publishFullContrib: true for ydb

<HIDDEN_URL>
commit_hash:c82a80ac4594723cebf2c7387dec9c60217f603e

44 files changed, 4816 insertions, 0 deletions

diff --git a/contrib/python/cryptography/py2/_cffi_src/__init__.py b/contrib/python/cryptography/py2/_cffi_src/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/__init__.py
diff --git a/contrib/python/cryptography/py2/_cffi_src/build_openssl.py b/contrib/python/cryptography/py2/_cffi_src/build_openssl.py
new file mode 100644
index 0000000000..4380c33969
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/build_openssl.py
@@ -0,0 +1,121 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+import os
+import sys
+from distutils import dist
+from distutils.ccompiler import get_default_compiler
+from distutils.command.config import config
+
+from _cffi_src.utils import (
+    build_ffi_for_binding,
+    compiler_type,
+    extra_link_args,
+)
+
+
+def _get_openssl_libraries(platform):
+    if os.environ.get("CRYPTOGRAPHY_SUPPRESS_LINK_FLAGS", None):
+        return []
+    # OpenSSL goes by a different library name on different operating systems.
+    if platform == "win32" and compiler_type() == "msvc":
+        return [
+            "libssl",
+            "libcrypto",
+            "advapi32",
+            "crypt32",
+            "gdi32",
+            "user32",
+            "ws2_32",
+        ]
+    else:
+        # darwin, linux, mingw all use this path
+        # In some circumstances, the order in which these libs are
+        # specified on the linker command-line is significant;
+        # libssl must come before libcrypto
+        # (https://marc.info/?l=openssl-users&m=135361825921871)
+        # -lpthread required due to usage of pthread an potential
+        # existance of a static part containing e.g. pthread_atfork
+        # (https://github.com/pyca/cryptography/issues/5084)
+        if sys.platform == "zos":
+            return ["ssl", "crypto"]
+        else:
+            return ["ssl", "crypto", "pthread"]
+
+
+def _extra_compile_args(platform):
+    """
+    We set -Wconversion args here so that we only do Wconversion checks on the
+    code we're compiling and not on cffi itself (as passing -Wconversion in
+    CFLAGS would do). We set no error on sign conversion because some
+    function signatures in LibreSSL differ from OpenSSL have changed on long
+    vs. unsigned long in the past. Since that isn't a precision issue we don't
+    care.
+    """
+    # make sure the compiler used supports the flags to be added
+    is_gcc = False
+    if get_default_compiler() == "unix":
+        d = dist.Distribution()
+        cmd = config(d)
+        cmd._check_compiler()
+        is_gcc = (
+            "gcc" in cmd.compiler.compiler[0]
+            or "clang" in cmd.compiler.compiler[0]
+        )
+    if is_gcc or not (
+        platform in ["win32", "hp-ux11", "sunos5"]
+        or platform.startswith("aix")
+    ):
+        return ["-Wconversion", "-Wno-error=sign-conversion"]
+    else:
+        return []
+
+
+ffi = build_ffi_for_binding(
+    module_name="_openssl",
+    module_prefix="_cffi_src.openssl.",
+    modules=[
+        # This goes first so we can define some cryptography-wide symbols.
+        "cryptography",
+        "aes",
+        "asn1",
+        "bignum",
+        "bio",
+        "cmac",
+        "conf",
+        "crypto",
+        "ct",
+        "dh",
+        "dsa",
+        "ec",
+        "ecdh",
+        "ecdsa",
+        "engine",
+        "err",
+        "evp",
+        "fips",
+        "hmac",
+        "nid",
+        "objects",
+        "ocsp",
+        "opensslv",
+        "osrandom_engine",
+        "pem",
+        "pkcs12",
+        "rand",
+        "rsa",
+        "ssl",
+        "x509",
+        "x509name",
+        "x509v3",
+        "x509_vfy",
+        "pkcs7",
+        "callbacks",
+    ],
+    libraries=_get_openssl_libraries(sys.platform),
+    extra_compile_args=_extra_compile_args(sys.platform),
+    extra_link_args=extra_link_args(compiler_type()),
+)
diff --git a/contrib/python/cryptography/py2/_cffi_src/build_padding.py b/contrib/python/cryptography/py2/_cffi_src/build_padding.py
new file mode 100644
index 0000000000..207f4a658e
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/build_padding.py
@@ -0,0 +1,27 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+import os
+
+from _cffi_src.utils import build_ffi, compiler_type, extra_link_args
+
+
+with open(
+    os.path.join(os.path.dirname(__file__), "hazmat_src/padding.h")
+) as f:
+    types = f.read()
+
+with open(
+    os.path.join(os.path.dirname(__file__), "hazmat_src/padding.c")
+) as f:
+    functions = f.read()
+
+ffi = build_ffi(
+    module_name="_padding",
+    cdef_source=types,
+    verify_source=functions,
+    extra_link_args=extra_link_args(compiler_type()),
+)
diff --git a/contrib/python/cryptography/py2/_cffi_src/hazmat_src/padding.c b/contrib/python/cryptography/py2/_cffi_src/hazmat_src/padding.c
new file mode 100644
index 0000000000..a6e05dee1e
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/hazmat_src/padding.c
@@ -0,0 +1,65 @@
+// This file is dual licensed under the terms of the Apache License, Version
+// 2.0, and the BSD License. See the LICENSE file in the root of this
+// repository for complete details.
+
+/* Returns the value of the input with the most-significant-bit copied to all
+   of the bits. */
+static uint16_t Cryptography_DUPLICATE_MSB_TO_ALL(uint16_t a) {
+    return (1 - (a >> (sizeof(uint16_t) * 8 - 1))) - 1;
+}
+
+/* This returns 0xFFFF if a < b else 0x0000, but does so in a constant time
+   fashion */
+static uint16_t Cryptography_constant_time_lt(uint16_t a, uint16_t b) {
+    a -= b;
+    return Cryptography_DUPLICATE_MSB_TO_ALL(a);
+}
+
+uint8_t Cryptography_check_pkcs7_padding(const uint8_t *data,
+                                         uint16_t block_len) {
+    uint16_t i;
+    uint16_t pad_size = data[block_len - 1];
+    uint16_t mismatch = 0;
+    for (i = 0; i < block_len; i++) {
+        unsigned int mask = Cryptography_constant_time_lt(i, pad_size);
+        uint16_t b = data[block_len - 1 - i];
+        mismatch |= (mask & (pad_size ^ b));
+    }
+
+    /* Check to make sure the pad_size was within the valid range. */
+    mismatch |= ~Cryptography_constant_time_lt(0, pad_size);
+    mismatch |= Cryptography_constant_time_lt(block_len, pad_size);
+
+    /* Make sure any bits set are copied to the lowest bit */
+    mismatch |= mismatch >> 8;
+    mismatch |= mismatch >> 4;
+    mismatch |= mismatch >> 2;
+    mismatch |= mismatch >> 1;
+    /* Now check the low bit to see if it's set */
+    return (mismatch & 1) == 0;
+}
+
+uint8_t Cryptography_check_ansix923_padding(const uint8_t *data,
+                                            uint16_t block_len) {
+    uint16_t i;
+    uint16_t pad_size = data[block_len - 1];
+    uint16_t mismatch = 0;
+    /* Skip the first one with the pad size */
+    for (i = 1; i < block_len; i++) {
+        unsigned int mask = Cryptography_constant_time_lt(i, pad_size);
+        uint16_t b = data[block_len - 1 - i];
+        mismatch |= (mask & b);
+    }
+
+    /* Check to make sure the pad_size was within the valid range. */
+    mismatch |= ~Cryptography_constant_time_lt(0, pad_size);
+    mismatch |= Cryptography_constant_time_lt(block_len, pad_size);
+
+    /* Make sure any bits set are copied to the lowest bit */
+    mismatch |= mismatch >> 8;
+    mismatch |= mismatch >> 4;
+    mismatch |= mismatch >> 2;
+    mismatch |= mismatch >> 1;
+    /* Now check the low bit to see if it's set */
+    return (mismatch & 1) == 0;
+}
diff --git a/contrib/python/cryptography/py2/_cffi_src/hazmat_src/padding.h b/contrib/python/cryptography/py2/_cffi_src/hazmat_src/padding.h
new file mode 100644
index 0000000000..fb023c1711
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/hazmat_src/padding.h
@@ -0,0 +1,6 @@
+// This file is dual licensed under the terms of the Apache License, Version
+// 2.0, and the BSD License. See the LICENSE file in the root of this
+// repository for complete details.
+
+uint8_t Cryptography_check_pkcs7_padding(const uint8_t *, uint8_t);
+uint8_t Cryptography_check_ansix923_padding(const uint8_t *, uint8_t);
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/__init__.py b/contrib/python/cryptography/py2/_cffi_src/openssl/__init__.py
new file mode 100644
index 0000000000..4b540884df
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/__init__.py
@@ -0,0 +1,5 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/aes.py b/contrib/python/cryptography/py2/_cffi_src/openssl/aes.py
new file mode 100644
index 0000000000..25ef3ec0e3
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/aes.py
@@ -0,0 +1,23 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/aes.h>
+"""
+
+TYPES = """
+typedef ... AES_KEY;
+"""
+
+FUNCTIONS = """
+int AES_wrap_key(AES_KEY *, const unsigned char *, unsigned char *,
+                 const unsigned char *, unsigned int);
+int AES_unwrap_key(AES_KEY *, const unsigned char *, unsigned char *,
+                   const unsigned char *, unsigned int);
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/asn1.py b/contrib/python/cryptography/py2/_cffi_src/openssl/asn1.py
new file mode 100644
index 0000000000..da55b670e0
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/asn1.py
@@ -0,0 +1,108 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/asn1.h>
+"""
+
+TYPES = """
+typedef int... time_t;
+
+typedef ... ASN1_INTEGER;
+
+struct asn1_string_st {
+    int length;
+    int type;
+    unsigned char *data;
+    long flags;
+};
+
+typedef struct asn1_string_st ASN1_OCTET_STRING;
+typedef struct asn1_string_st ASN1_IA5STRING;
+typedef struct asn1_string_st ASN1_BIT_STRING;
+typedef struct asn1_string_st ASN1_TIME;
+typedef ... ASN1_OBJECT;
+typedef struct asn1_string_st ASN1_STRING;
+typedef struct asn1_string_st ASN1_UTF8STRING;
+typedef struct {
+    int type;
+    ...;
+} ASN1_TYPE;
+typedef ... ASN1_GENERALIZEDTIME;
+typedef ... ASN1_ENUMERATED;
+typedef ... ASN1_NULL;
+
+static const int V_ASN1_GENERALIZEDTIME;
+
+static const int MBSTRING_UTF8;
+"""
+
+FUNCTIONS = """
+void ASN1_OBJECT_free(ASN1_OBJECT *);
+
+/*  ASN1 STRING */
+unsigned char *ASN1_STRING_data(ASN1_STRING *);
+int ASN1_STRING_set(ASN1_STRING *, const void *, int);
+
+/*  ASN1 OCTET STRING */
+ASN1_OCTET_STRING *ASN1_OCTET_STRING_new(void);
+void ASN1_OCTET_STRING_free(ASN1_OCTET_STRING *);
+int ASN1_OCTET_STRING_set(ASN1_OCTET_STRING *, const unsigned char *, int);
+
+/* ASN1 IA5STRING */
+ASN1_IA5STRING *ASN1_IA5STRING_new(void);
+
+/*  ASN1 INTEGER */
+void ASN1_INTEGER_free(ASN1_INTEGER *);
+int ASN1_INTEGER_set(ASN1_INTEGER *, long);
+
+/*  ASN1 TIME */
+ASN1_TIME *ASN1_TIME_new(void);
+void ASN1_TIME_free(ASN1_TIME *);
+int ASN1_TIME_set_string(ASN1_TIME *, const char *);
+
+/*  ASN1 GENERALIZEDTIME */
+ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *, time_t);
+void ASN1_GENERALIZEDTIME_free(ASN1_GENERALIZEDTIME *);
+
+/*  ASN1 ENUMERATED */
+ASN1_ENUMERATED *ASN1_ENUMERATED_new(void);
+void ASN1_ENUMERATED_free(ASN1_ENUMERATED *);
+int ASN1_ENUMERATED_set(ASN1_ENUMERATED *, long);
+
+int ASN1_BIT_STRING_set_bit(ASN1_BIT_STRING *, int, int);
+/* These became const ASN1_* in 1.1.0 */
+int ASN1_STRING_type(ASN1_STRING *);
+int ASN1_STRING_to_UTF8(unsigned char **, ASN1_STRING *);
+long ASN1_ENUMERATED_get(ASN1_ENUMERATED *);
+int i2a_ASN1_INTEGER(BIO *, ASN1_INTEGER *);
+
+/* This became const ASN1_TIME in 1.1.0f */
+ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *,
+                                                   ASN1_GENERALIZEDTIME **);
+
+ASN1_UTF8STRING *ASN1_UTF8STRING_new(void);
+void ASN1_UTF8STRING_free(ASN1_UTF8STRING *);
+
+ASN1_BIT_STRING *ASN1_BIT_STRING_new(void);
+void ASN1_BIT_STRING_free(ASN1_BIT_STRING *);
+/* This is not a macro, but is const on some versions of OpenSSL */
+int ASN1_BIT_STRING_get_bit(ASN1_BIT_STRING *, int);
+
+int ASN1_STRING_length(ASN1_STRING *);
+int ASN1_STRING_set_default_mask_asc(char *);
+
+BIGNUM *ASN1_INTEGER_to_BN(ASN1_INTEGER *, BIGNUM *);
+ASN1_INTEGER *BN_to_ASN1_INTEGER(BIGNUM *, ASN1_INTEGER *);
+
+int i2d_ASN1_TYPE(ASN1_TYPE *, unsigned char **);
+ASN1_TYPE *d2i_ASN1_TYPE(ASN1_TYPE **, const unsigned char **, long);
+
+ASN1_NULL *ASN1_NULL_new(void);
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/bignum.py b/contrib/python/cryptography/py2/_cffi_src/openssl/bignum.py
new file mode 100644
index 0000000000..751018391d
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/bignum.py
@@ -0,0 +1,85 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/bn.h>
+"""
+
+TYPES = """
+typedef ... BN_CTX;
+typedef ... BN_MONT_CTX;
+typedef ... BIGNUM;
+typedef int... BN_ULONG;
+"""
+
+FUNCTIONS = """
+#define BN_FLG_CONSTTIME ...
+
+void BN_set_flags(BIGNUM *, int);
+
+BIGNUM *BN_new(void);
+void BN_free(BIGNUM *);
+void BN_clear_free(BIGNUM *);
+
+int BN_rand_range(BIGNUM *, const BIGNUM *);
+
+BN_CTX *BN_CTX_new(void);
+void BN_CTX_free(BN_CTX *);
+
+void BN_CTX_start(BN_CTX *);
+BIGNUM *BN_CTX_get(BN_CTX *);
+void BN_CTX_end(BN_CTX *);
+
+BN_MONT_CTX *BN_MONT_CTX_new(void);
+int BN_MONT_CTX_set(BN_MONT_CTX *, const BIGNUM *, BN_CTX *);
+void BN_MONT_CTX_free(BN_MONT_CTX *);
+
+BIGNUM *BN_dup(const BIGNUM *);
+
+int BN_set_word(BIGNUM *, BN_ULONG);
+
+const BIGNUM *BN_value_one(void);
+
+char *BN_bn2hex(const BIGNUM *);
+int BN_hex2bn(BIGNUM **, const char *);
+
+int BN_bn2bin(const BIGNUM *, unsigned char *);
+BIGNUM *BN_bin2bn(const unsigned char *, int, BIGNUM *);
+
+int BN_num_bits(const BIGNUM *);
+
+int BN_cmp(const BIGNUM *, const BIGNUM *);
+int BN_is_negative(const BIGNUM *);
+int BN_add(BIGNUM *, const BIGNUM *, const BIGNUM *);
+int BN_sub(BIGNUM *, const BIGNUM *, const BIGNUM *);
+int BN_nnmod(BIGNUM *, const BIGNUM *, const BIGNUM *, BN_CTX *);
+int BN_mod_add(BIGNUM *, const BIGNUM *, const BIGNUM *, const BIGNUM *,
+               BN_CTX *);
+int BN_mod_sub(BIGNUM *, const BIGNUM *, const BIGNUM *, const BIGNUM *,
+               BN_CTX *);
+int BN_mod_mul(BIGNUM *, const BIGNUM *, const BIGNUM *, const BIGNUM *,
+               BN_CTX *);
+int BN_mod_exp(BIGNUM *, const BIGNUM *, const BIGNUM *, const BIGNUM *,
+               BN_CTX *);
+int BN_mod_exp_mont(BIGNUM *, const BIGNUM *, const BIGNUM *, const BIGNUM *,
+                    BN_CTX *, BN_MONT_CTX *);
+int BN_mod_exp_mont_consttime(BIGNUM *, const BIGNUM *, const BIGNUM *,
+                              const BIGNUM *, BN_CTX *, BN_MONT_CTX *);
+BIGNUM *BN_mod_inverse(BIGNUM *, const BIGNUM *, const BIGNUM *, BN_CTX *);
+
+int BN_num_bytes(const BIGNUM *);
+
+int BN_mod(BIGNUM *, const BIGNUM *, const BIGNUM *, BN_CTX *);
+
+/* The following 3 prime methods are exposed for Tribler. */
+int BN_generate_prime_ex(BIGNUM *, int, int, const BIGNUM *,
+                         const BIGNUM *, BN_GENCB *);
+int BN_is_prime_ex(const BIGNUM *, int, BN_CTX *, BN_GENCB *);
+const int BN_prime_checks_for_size(int);
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/bio.py b/contrib/python/cryptography/py2/_cffi_src/openssl/bio.py
new file mode 100644
index 0000000000..52d57c6228
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/bio.py
@@ -0,0 +1,44 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/bio.h>
+"""
+
+TYPES = """
+typedef ... BIO;
+typedef ... BIO_METHOD;
+"""
+
+FUNCTIONS = """
+int BIO_free(BIO *);
+void BIO_free_all(BIO *);
+BIO *BIO_new_file(const char *, const char *);
+BIO *BIO_new_dgram(int, int);
+size_t BIO_ctrl_pending(BIO *);
+int BIO_read(BIO *, void *, int);
+int BIO_gets(BIO *, char *, int);
+int BIO_write(BIO *, const void *, int);
+/* Added in 1.1.0 */
+int BIO_up_ref(BIO *);
+
+BIO *BIO_new(BIO_METHOD *);
+BIO_METHOD *BIO_s_mem(void);
+BIO_METHOD *BIO_s_datagram(void);
+BIO *BIO_new_mem_buf(const void *, int);
+long BIO_set_mem_eof_return(BIO *, int);
+long BIO_get_mem_data(BIO *, char **);
+int BIO_should_read(BIO *);
+int BIO_should_write(BIO *);
+int BIO_should_io_special(BIO *);
+int BIO_should_retry(BIO *);
+int BIO_reset(BIO *);
+void BIO_set_retry_read(BIO *);
+void BIO_clear_retry_flags(BIO *);
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/callbacks.py b/contrib/python/cryptography/py2/_cffi_src/openssl/callbacks.py
new file mode 100644
index 0000000000..19301b973a
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/callbacks.py
@@ -0,0 +1,52 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <string.h>
+"""
+
+TYPES = """
+typedef struct {
+    char *password;
+    int length;
+    int called;
+    int error;
+    int maxsize;
+} CRYPTOGRAPHY_PASSWORD_DATA;
+"""
+
+FUNCTIONS = """
+int Cryptography_pem_password_cb(char *, int, int, void *);
+"""
+
+CUSTOMIZATIONS = """
+typedef struct {
+    char *password;
+    int length;
+    int called;
+    int error;
+    int maxsize;
+} CRYPTOGRAPHY_PASSWORD_DATA;
+
+int Cryptography_pem_password_cb(char *buf, int size,
+                                  int rwflag, void *userdata) {
+    /* The password cb is only invoked if OpenSSL decides the private
+       key is encrypted. So this path only occurs if it needs a password */
+    CRYPTOGRAPHY_PASSWORD_DATA *st = (CRYPTOGRAPHY_PASSWORD_DATA *)userdata;
+    st->called += 1;
+    st->maxsize = size;
+    if (st->length == 0) {
+        st->error = -1;
+        return 0;
+    } else if (st->length < size) {
+        memcpy(buf, st->password, st->length);
+        return st->length;
+    } else {
+        st->error = -2;
+        return 0;
+    }
+}
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/cmac.py b/contrib/python/cryptography/py2/_cffi_src/openssl/cmac.py
new file mode 100644
index 0000000000..557abd1ca8
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/cmac.py
@@ -0,0 +1,27 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#if !defined(OPENSSL_NO_CMAC)
+#include <openssl/cmac.h>
+#endif
+"""
+
+TYPES = """
+typedef ... CMAC_CTX;
+"""
+
+FUNCTIONS = """
+CMAC_CTX *CMAC_CTX_new(void);
+int CMAC_Init(CMAC_CTX *, const void *, size_t, const EVP_CIPHER *, ENGINE *);
+int CMAC_Update(CMAC_CTX *, const void *, size_t);
+int CMAC_Final(CMAC_CTX *, unsigned char *, size_t *);
+int CMAC_CTX_copy(CMAC_CTX *, const CMAC_CTX *);
+void CMAC_CTX_free(CMAC_CTX *);
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/conf.py b/contrib/python/cryptography/py2/_cffi_src/openssl/conf.py
new file mode 100644
index 0000000000..9db0162a63
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/conf.py
@@ -0,0 +1,21 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/conf.h>
+"""
+
+TYPES = """
+"""
+
+FUNCTIONS = """
+void OPENSSL_config(const char *);
+/* This is a macro in 1.1.0 */
+void OPENSSL_no_config(void);
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/crypto.py b/contrib/python/cryptography/py2/_cffi_src/openssl/crypto.py
new file mode 100644
index 0000000000..6064a4eeea
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/crypto.py
@@ -0,0 +1,117 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/crypto.h>
+"""
+
+TYPES = """
+static const long Cryptography_HAS_MEM_FUNCTIONS;
+static const long Cryptography_HAS_OPENSSL_CLEANUP;
+
+static const int SSLEAY_VERSION;
+static const int SSLEAY_CFLAGS;
+static const int SSLEAY_PLATFORM;
+static const int SSLEAY_DIR;
+static const int SSLEAY_BUILT_ON;
+static const int OPENSSL_VERSION;
+static const int OPENSSL_CFLAGS;
+static const int OPENSSL_BUILT_ON;
+static const int OPENSSL_PLATFORM;
+static const int OPENSSL_DIR;
+"""
+
+FUNCTIONS = """
+void OPENSSL_cleanup(void);
+
+/* SSLeay was removed in 1.1.0 */
+unsigned long SSLeay(void);
+const char *SSLeay_version(int);
+/* these functions were added to replace the SSLeay functions in 1.1.0 */
+unsigned long OpenSSL_version_num(void);
+const char *OpenSSL_version(int);
+
+/* this is a macro in 1.1.0 */
+void *OPENSSL_malloc(size_t);
+void OPENSSL_free(void *);
+
+
+/* Signature changed significantly in 1.1.0, only expose there for sanity */
+int Cryptography_CRYPTO_set_mem_functions(
+    void *(*)(size_t, const char *, int),
+    void *(*)(void *, size_t, const char *, int),
+    void (*)(void *, const char *, int));
+
+void *Cryptography_malloc_wrapper(size_t, const char *, int);
+void *Cryptography_realloc_wrapper(void *, size_t, const char *, int);
+void Cryptography_free_wrapper(void *, const char *, int);
+"""
+
+CUSTOMIZATIONS = """
+/* In 1.1.0 SSLeay has finally been retired. We bidirectionally define the
+   values so you can use either one. This is so we can use the new function
+   names no matter what OpenSSL we're running on, but users on older pyOpenSSL
+   releases won't see issues if they're running OpenSSL 1.1.0 */
+#if !defined(SSLEAY_VERSION)
+# define SSLeay                  OpenSSL_version_num
+# define SSLeay_version          OpenSSL_version
+# define SSLEAY_VERSION_NUMBER   OPENSSL_VERSION_NUMBER
+# define SSLEAY_VERSION          OPENSSL_VERSION
+# define SSLEAY_CFLAGS           OPENSSL_CFLAGS
+# define SSLEAY_BUILT_ON         OPENSSL_BUILT_ON
+# define SSLEAY_PLATFORM         OPENSSL_PLATFORM
+# define SSLEAY_DIR              OPENSSL_DIR
+#endif
+#if !defined(OPENSSL_VERSION)
+# define OpenSSL_version_num     SSLeay
+# define OpenSSL_version         SSLeay_version
+# define OPENSSL_VERSION         SSLEAY_VERSION
+# define OPENSSL_CFLAGS          SSLEAY_CFLAGS
+# define OPENSSL_BUILT_ON        SSLEAY_BUILT_ON
+# define OPENSSL_PLATFORM        SSLEAY_PLATFORM
+# define OPENSSL_DIR             SSLEAY_DIR
+#endif
+
+#if CRYPTOGRAPHY_IS_LIBRESSL
+static const long Cryptography_HAS_OPENSSL_CLEANUP = 0;
+
+void (*OPENSSL_cleanup)(void) = NULL;
+
+/* This function has a significantly different signature pre-1.1.0. since it is
+ * for testing only, we don't bother to expose it on older OpenSSLs.
+ */
+static const long Cryptography_HAS_MEM_FUNCTIONS = 0;
+int (*Cryptography_CRYPTO_set_mem_functions)(
+    void *(*)(size_t, const char *, int),
+    void *(*)(void *, size_t, const char *, int),
+    void (*)(void *, const char *, int)) = NULL;
+
+#else
+static const long Cryptography_HAS_OPENSSL_CLEANUP = 1;
+static const long Cryptography_HAS_MEM_FUNCTIONS = 1;
+
+int Cryptography_CRYPTO_set_mem_functions(
+    void *(*m)(size_t, const char *, int),
+    void *(*r)(void *, size_t, const char *, int),
+    void (*f)(void *, const char *, int)
+) {
+    return CRYPTO_set_mem_functions(m, r, f);
+}
+#endif
+
+void *Cryptography_malloc_wrapper(size_t size, const char *path, int line) {
+    return malloc(size);
+}
+
+void *Cryptography_realloc_wrapper(void *ptr, size_t size, const char *path,
+                                   int line) {
+    return realloc(ptr, size);
+}
+
+void Cryptography_free_wrapper(void *ptr, const char *path, int line) {
+    free(ptr);
+}
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/cryptography.py b/contrib/python/cryptography/py2/_cffi_src/openssl/cryptography.py
new file mode 100644
index 0000000000..f24bee5a4f
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/cryptography.py
@@ -0,0 +1,69 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+/* define our OpenSSL API compatibility level to 1.0.1. Any symbols older than
+   that will raise an error during compilation. We can raise this number again
+   after we drop 1.0.2 support in the distant future.  */
+#define OPENSSL_API_COMPAT 0x10001000L
+
+#include <openssl/opensslv.h>
+
+
+#if defined(LIBRESSL_VERSION_NUMBER)
+#define CRYPTOGRAPHY_IS_LIBRESSL 1
+#else
+#define CRYPTOGRAPHY_IS_LIBRESSL 0
+#endif
+
+/*
+    LibreSSL removed e_os2.h from the public headers so we'll only include it
+    if we're using vanilla OpenSSL.
+*/
+#if !CRYPTOGRAPHY_IS_LIBRESSL
+#include <openssl/e_os2.h>
+#endif
+#if defined(_WIN32)
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <Wincrypt.h>
+#include <Winsock2.h>
+#endif
+
+#define CRYPTOGRAPHY_OPENSSL_110F_OR_GREATER \
+    (OPENSSL_VERSION_NUMBER >= 0x1010006f && !CRYPTOGRAPHY_IS_LIBRESSL)
+
+#define CRYPTOGRAPHY_OPENSSL_LESS_THAN_110J \
+    (OPENSSL_VERSION_NUMBER < 0x101000af || CRYPTOGRAPHY_IS_LIBRESSL)
+#define CRYPTOGRAPHY_OPENSSL_LESS_THAN_111 \
+    (OPENSSL_VERSION_NUMBER < 0x10101000 || CRYPTOGRAPHY_IS_LIBRESSL)
+#define CRYPTOGRAPHY_OPENSSL_LESS_THAN_111B \
+    (OPENSSL_VERSION_NUMBER < 0x10101020 || CRYPTOGRAPHY_IS_LIBRESSL)
+#define CRYPTOGRAPHY_OPENSSL_LESS_THAN_111D \
+    (OPENSSL_VERSION_NUMBER < 0x10101040 || CRYPTOGRAPHY_IS_LIBRESSL)
+#if (CRYPTOGRAPHY_OPENSSL_LESS_THAN_111D && !CRYPTOGRAPHY_IS_LIBRESSL && \
+    !defined(OPENSSL_NO_ENGINE)) || defined(USE_OSRANDOM_RNG_FOR_TESTING)
+#define CRYPTOGRAPHY_NEEDS_OSRANDOM_ENGINE 1
+#else
+#define CRYPTOGRAPHY_NEEDS_OSRANDOM_ENGINE 0
+#endif
+"""
+
+TYPES = """
+static const int CRYPTOGRAPHY_OPENSSL_110F_OR_GREATER;
+
+static const int CRYPTOGRAPHY_OPENSSL_LESS_THAN_111;
+static const int CRYPTOGRAPHY_OPENSSL_LESS_THAN_111B;
+static const int CRYPTOGRAPHY_NEEDS_OSRANDOM_ENGINE;
+
+static const int CRYPTOGRAPHY_IS_LIBRESSL;
+"""
+
+FUNCTIONS = """
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/ct.py b/contrib/python/cryptography/py2/_cffi_src/openssl/ct.py
new file mode 100644
index 0000000000..5f0670635f
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/ct.py
@@ -0,0 +1,118 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#if CRYPTOGRAPHY_OPENSSL_110F_OR_GREATER && !defined(OPENSSL_NO_CT)
+#include <openssl/ct.h>
+
+typedef STACK_OF(SCT) Cryptography_STACK_OF_SCT;
+#endif
+"""
+
+TYPES = """
+static const long Cryptography_HAS_SCT;
+
+typedef enum {
+    SCT_VERSION_NOT_SET,
+    SCT_VERSION_V1
+} sct_version_t;
+
+typedef enum {
+    CT_LOG_ENTRY_TYPE_NOT_SET,
+    CT_LOG_ENTRY_TYPE_X509,
+    CT_LOG_ENTRY_TYPE_PRECERT
+} ct_log_entry_type_t;
+
+typedef enum {
+    SCT_SOURCE_UNKNOWN,
+    SCT_SOURCE_TLS_EXTENSION,
+    SCT_SOURCE_X509V3_EXTENSION,
+    SCT_SOURCE_OCSP_STAPLED_RESPONSE
+} sct_source_t;
+
+typedef ... SCT;
+typedef ... Cryptography_STACK_OF_SCT;
+"""
+
+FUNCTIONS = """
+sct_version_t SCT_get_version(const SCT *);
+
+ct_log_entry_type_t SCT_get_log_entry_type(const SCT *);
+
+size_t SCT_get0_log_id(const SCT *, unsigned char **);
+
+size_t SCT_get0_signature(const SCT *, unsigned char **);
+
+uint64_t SCT_get_timestamp(const SCT *);
+
+int SCT_set_source(SCT *, sct_source_t);
+
+Cryptography_STACK_OF_SCT *sk_SCT_new_null(void);
+void sk_SCT_free(Cryptography_STACK_OF_SCT *);
+int sk_SCT_num(const Cryptography_STACK_OF_SCT *);
+SCT *sk_SCT_value(const Cryptography_STACK_OF_SCT *, int);
+int sk_SCT_push(Cryptography_STACK_OF_SCT *, SCT *);
+
+void SCT_LIST_free(Cryptography_STACK_OF_SCT *);
+
+SCT *SCT_new(void);
+int SCT_set1_log_id(SCT *, unsigned char *, size_t);
+void SCT_set_timestamp(SCT *, uint64_t);
+int SCT_set_version(SCT *, sct_version_t);
+int SCT_set_log_entry_type(SCT *, ct_log_entry_type_t);
+"""
+
+CUSTOMIZATIONS = """
+#if CRYPTOGRAPHY_OPENSSL_110F_OR_GREATER && !defined(OPENSSL_NO_CT)
+static const long Cryptography_HAS_SCT = 1;
+#else
+static const long Cryptography_HAS_SCT = 0;
+
+typedef enum {
+    SCT_VERSION_NOT_SET,
+    SCT_VERSION_V1
+} sct_version_t;
+typedef enum {
+    CT_LOG_ENTRY_TYPE_NOT_SET,
+    CT_LOG_ENTRY_TYPE_X509,
+    CT_LOG_ENTRY_TYPE_PRECERT
+} ct_log_entry_type_t;
+typedef enum {
+    SCT_SOURCE_UNKNOWN,
+    SCT_SOURCE_TLS_EXTENSION,
+    SCT_SOURCE_X509V3_EXTENSION,
+    SCT_SOURCE_OCSP_STAPLED_RESPONSE
+} sct_source_t;
+
+/* OpenSSL compiled with `no-ct` still defines the `SCT` struct. */
+#if !defined(OPENSSL_NO_CT)
+typedef void SCT;
+#endif
+
+typedef void Cryptography_STACK_OF_SCT;
+
+sct_version_t (*SCT_get_version)(const SCT *) = NULL;
+ct_log_entry_type_t (*SCT_get_log_entry_type)(const SCT *) = NULL;
+size_t (*SCT_get0_log_id)(const SCT *, unsigned char **) = NULL;
+size_t (*SCT_get0_signature)(const SCT *, unsigned char **) = NULL;
+uint64_t (*SCT_get_timestamp)(const SCT *) = NULL;
+
+int (*SCT_set_source)(SCT *, sct_source_t) = NULL;
+
+Cryptography_STACK_OF_SCT *(*sk_SCT_new_null)(void) = NULL;
+void (*sk_SCT_free)(Cryptography_STACK_OF_SCT *) = NULL;
+int (*sk_SCT_num)(const Cryptography_STACK_OF_SCT *) = NULL;
+SCT *(*sk_SCT_value)(const Cryptography_STACK_OF_SCT *, int) = NULL;
+int (*sk_SCT_push)(Cryptography_STACK_OF_SCT *, SCT *) = NULL;
+
+void (*SCT_LIST_free)(Cryptography_STACK_OF_SCT *) = NULL;
+SCT *(*SCT_new)(void) = NULL;
+int (*SCT_set1_log_id)(SCT *, unsigned char *, size_t) = NULL;
+void (*SCT_set_timestamp)(SCT *, uint64_t) = NULL;
+int (*SCT_set_version)(SCT *, sct_version_t) = NULL;
+int (*SCT_set_log_entry_type)(SCT *, ct_log_entry_type_t) = NULL;
+#endif
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/dh.py b/contrib/python/cryptography/py2/_cffi_src/openssl/dh.py
new file mode 100644
index 0000000000..947a5a8ee0
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/dh.py
@@ -0,0 +1,166 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/dh.h>
+"""
+
+TYPES = """
+typedef ... DH;
+
+const long DH_NOT_SUITABLE_GENERATOR;
+"""
+
+FUNCTIONS = """
+DH *DH_new(void);
+void DH_free(DH *);
+int DH_size(const DH *);
+int DH_generate_key(DH *);
+int DH_compute_key(unsigned char *, const BIGNUM *, DH *);
+DH *DHparams_dup(DH *);
+
+/* added in 1.1.0 when the DH struct was opaqued */
+void DH_get0_pqg(const DH *, const BIGNUM **, const BIGNUM **,
+                 const BIGNUM **);
+int DH_set0_pqg(DH *, BIGNUM *, BIGNUM *, BIGNUM *);
+void DH_get0_key(const DH *, const BIGNUM **, const BIGNUM **);
+int DH_set0_key(DH *, BIGNUM *, BIGNUM *);
+
+int Cryptography_DH_check(const DH *, int *);
+int DH_generate_parameters_ex(DH *, int, int, BN_GENCB *);
+DH *d2i_DHparams_bio(BIO *, DH **);
+int i2d_DHparams_bio(BIO *, DH *);
+DH *Cryptography_d2i_DHxparams_bio(BIO *bp, DH **x);
+int Cryptography_i2d_DHxparams_bio(BIO *bp, DH *x);
+"""
+
+CUSTOMIZATIONS = """
+#if CRYPTOGRAPHY_IS_LIBRESSL
+#ifndef DH_CHECK_Q_NOT_PRIME
+#define DH_CHECK_Q_NOT_PRIME            0x10
+#endif
+
+#ifndef DH_CHECK_INVALID_Q_VALUE
+#define DH_CHECK_INVALID_Q_VALUE        0x20
+#endif
+
+#ifndef DH_CHECK_INVALID_J_VALUE
+#define DH_CHECK_INVALID_J_VALUE        0x40
+#endif
+
+/* DH_check implementation taken from OpenSSL 1.1.0pre6 */
+
+/*-
+ * Check that p is a safe prime and
+ * if g is 2, 3 or 5, check that it is a suitable generator
+ * where
+ * for 2, p mod 24 == 11
+ * for 3, p mod 12 == 5
+ * for 5, p mod 10 == 3 or 7
+ * should hold.
+ */
+
+int Cryptography_DH_check(const DH *dh, int *ret)
+{
+    int ok = 0, r;
+    BN_CTX *ctx = NULL;
+    BN_ULONG l;
+    BIGNUM *t1 = NULL, *t2 = NULL;
+
+    *ret = 0;
+    ctx = BN_CTX_new();
+    if (ctx == NULL)
+        goto err;
+    BN_CTX_start(ctx);
+    t1 = BN_CTX_get(ctx);
+    if (t1 == NULL)
+        goto err;
+    t2 = BN_CTX_get(ctx);
+    if (t2 == NULL)
+        goto err;
+
+    if (dh->q) {
+        if (BN_cmp(dh->g, BN_value_one()) <= 0)
+            *ret |= DH_NOT_SUITABLE_GENERATOR;
+        else if (BN_cmp(dh->g, dh->p) >= 0)
+            *ret |= DH_NOT_SUITABLE_GENERATOR;
+        else {
+            /* Check g^q == 1 mod p */
+            if (!BN_mod_exp(t1, dh->g, dh->q, dh->p, ctx))
+                goto err;
+            if (!BN_is_one(t1))
+                *ret |= DH_NOT_SUITABLE_GENERATOR;
+        }
+        r = BN_is_prime_ex(dh->q, BN_prime_checks, ctx, NULL);
+        if (r < 0)
+            goto err;
+        if (!r)
+            *ret |= DH_CHECK_Q_NOT_PRIME;
+        /* Check p == 1 mod q  i.e. q divides p - 1 */
+        if (!BN_div(t1, t2, dh->p, dh->q, ctx))
+            goto err;
+        if (!BN_is_one(t2))
+            *ret |= DH_CHECK_INVALID_Q_VALUE;
+        if (dh->j && BN_cmp(dh->j, t1))
+            *ret |= DH_CHECK_INVALID_J_VALUE;
+
+    } else if (BN_is_word(dh->g, DH_GENERATOR_2)) {
+        l = BN_mod_word(dh->p, 24);
+        if (l == (BN_ULONG)-1)
+            goto err;
+        if (l != 11)
+            *ret |= DH_NOT_SUITABLE_GENERATOR;
+    } else if (BN_is_word(dh->g, DH_GENERATOR_5)) {
+        l = BN_mod_word(dh->p, 10);
+        if (l == (BN_ULONG)-1)
+            goto err;
+        if ((l != 3) && (l != 7))
+            *ret |= DH_NOT_SUITABLE_GENERATOR;
+    } else
+        *ret |= DH_UNABLE_TO_CHECK_GENERATOR;
+
+    r = BN_is_prime_ex(dh->p, BN_prime_checks, ctx, NULL);
+    if (r < 0)
+        goto err;
+    if (!r)
+        *ret |= DH_CHECK_P_NOT_PRIME;
+    else if (!dh->q) {
+        if (!BN_rshift1(t1, dh->p))
+            goto err;
+        r = BN_is_prime_ex(t1, BN_prime_checks, ctx, NULL);
+        if (r < 0)
+            goto err;
+        if (!r)
+            *ret |= DH_CHECK_P_NOT_SAFE_PRIME;
+    }
+    ok = 1;
+ err:
+    if (ctx != NULL) {
+        BN_CTX_end(ctx);
+        BN_CTX_free(ctx);
+    }
+    return (ok);
+}
+#else
+int Cryptography_DH_check(const DH *dh, int *ret) {
+    return DH_check(dh, ret);
+}
+#endif
+
+/* These functions were added in OpenSSL 1.1.0f commit d0c50e80a8 */
+/* Define our own to simplify support across all versions. */
+#if defined(EVP_PKEY_DHX) && EVP_PKEY_DHX != -1
+DH *Cryptography_d2i_DHxparams_bio(BIO *bp, DH **x) {
+    return ASN1_d2i_bio_of(DH, DH_new, d2i_DHxparams, bp, x);
+}
+int Cryptography_i2d_DHxparams_bio(BIO *bp, DH *x) {
+    return ASN1_i2d_bio_of_const(DH, i2d_DHxparams, bp, x);
+}
+#else
+DH *(*Cryptography_d2i_DHxparams_bio)(BIO *bp, DH **x) = NULL;
+int (*Cryptography_i2d_DHxparams_bio)(BIO *bp, DH *x) = NULL;
+#endif
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/dsa.py b/contrib/python/cryptography/py2/_cffi_src/openssl/dsa.py
new file mode 100644
index 0000000000..3a290067bc
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/dsa.py
@@ -0,0 +1,37 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/dsa.h>
+"""
+
+TYPES = """
+typedef ... DSA;
+"""
+
+FUNCTIONS = """
+int DSA_generate_key(DSA *);
+DSA *DSA_new(void);
+void DSA_free(DSA *);
+DSA *DSAparams_dup(DSA *);
+int DSA_size(const DSA *);
+int DSA_sign(int, const unsigned char *, int, unsigned char *, unsigned int *,
+             DSA *);
+int DSA_verify(int, const unsigned char *, int, const unsigned char *, int,
+               DSA *);
+
+/* added in 1.1.0 to access the opaque struct */
+void DSA_get0_pqg(const DSA *, const BIGNUM **, const BIGNUM **,
+                  const BIGNUM **);
+int DSA_set0_pqg(DSA *, BIGNUM *, BIGNUM *, BIGNUM *);
+void DSA_get0_key(const DSA *, const BIGNUM **, const BIGNUM **);
+int DSA_set0_key(DSA *, BIGNUM *, BIGNUM *);
+int DSA_generate_parameters_ex(DSA *, int, unsigned char *, int,
+                               int *, unsigned long *, BN_GENCB *);
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/ec.py b/contrib/python/cryptography/py2/_cffi_src/openssl/ec.py
new file mode 100644
index 0000000000..6432fc22e9
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/ec.py
@@ -0,0 +1,126 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/ec.h>
+#include <openssl/obj_mac.h>
+"""
+
+TYPES = """
+static const int Cryptography_HAS_EC2M;
+
+static const int OPENSSL_EC_NAMED_CURVE;
+
+typedef ... EC_KEY;
+typedef ... EC_GROUP;
+typedef ... EC_POINT;
+typedef ... EC_METHOD;
+typedef struct {
+    int nid;
+    const char *comment;
+} EC_builtin_curve;
+typedef enum {
+    POINT_CONVERSION_COMPRESSED,
+    POINT_CONVERSION_UNCOMPRESSED,
+    ...
+} point_conversion_form_t;
+"""
+
+FUNCTIONS = """
+void EC_GROUP_free(EC_GROUP *);
+
+EC_GROUP *EC_GROUP_new_by_curve_name(int);
+
+int EC_GROUP_get_degree(const EC_GROUP *);
+
+const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *);
+const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *);
+int EC_GROUP_get_curve_name(const EC_GROUP *);
+
+size_t EC_get_builtin_curves(EC_builtin_curve *, size_t);
+
+EC_KEY *EC_KEY_new(void);
+void EC_KEY_free(EC_KEY *);
+
+EC_KEY *EC_KEY_new_by_curve_name(int);
+const EC_GROUP *EC_KEY_get0_group(const EC_KEY *);
+int EC_GROUP_get_order(const EC_GROUP *, BIGNUM *, BN_CTX *);
+int EC_KEY_set_group(EC_KEY *, const EC_GROUP *);
+const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *);
+int EC_KEY_set_private_key(EC_KEY *, const BIGNUM *);
+const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *);
+int EC_KEY_set_public_key(EC_KEY *, const EC_POINT *);
+void EC_KEY_set_asn1_flag(EC_KEY *, int);
+int EC_KEY_generate_key(EC_KEY *);
+int EC_KEY_set_public_key_affine_coordinates(EC_KEY *, BIGNUM *, BIGNUM *);
+
+EC_POINT *EC_POINT_new(const EC_GROUP *);
+void EC_POINT_free(EC_POINT *);
+void EC_POINT_clear_free(EC_POINT *);
+EC_POINT *EC_POINT_dup(const EC_POINT *, const EC_GROUP *);
+
+int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *, EC_POINT *,
+    const BIGNUM *, const BIGNUM *, BN_CTX *);
+
+int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *,
+    const EC_POINT *, BIGNUM *, BIGNUM *, BN_CTX *);
+
+int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *, EC_POINT *,
+    const BIGNUM *, int, BN_CTX *);
+
+int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *, EC_POINT *,
+    const BIGNUM *, const BIGNUM *, BN_CTX *);
+
+int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *,
+    const EC_POINT *, BIGNUM *, BIGNUM *, BN_CTX *);
+
+int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *, EC_POINT *,
+    const BIGNUM *, int, BN_CTX *);
+
+size_t EC_POINT_point2oct(const EC_GROUP *, const EC_POINT *,
+    point_conversion_form_t,
+    unsigned char *, size_t, BN_CTX *);
+
+int EC_POINT_oct2point(const EC_GROUP *, EC_POINT *,
+    const unsigned char *, size_t, BN_CTX *);
+
+int EC_POINT_add(const EC_GROUP *, EC_POINT *, const EC_POINT *,
+    const EC_POINT *, BN_CTX *);
+
+int EC_POINT_dbl(const EC_GROUP *, EC_POINT *, const EC_POINT *, BN_CTX *);
+int EC_POINT_invert(const EC_GROUP *, EC_POINT *, BN_CTX *);
+int EC_POINT_is_at_infinity(const EC_GROUP *, const EC_POINT *);
+int EC_POINT_is_on_curve(const EC_GROUP *, const EC_POINT *, BN_CTX *);
+
+int EC_POINT_cmp(
+    const EC_GROUP *, const EC_POINT *, const EC_POINT *, BN_CTX *);
+
+int EC_POINT_mul(const EC_GROUP *, EC_POINT *, const BIGNUM *,
+    const EC_POINT *, const BIGNUM *, BN_CTX *);
+
+int EC_METHOD_get_field_type(const EC_METHOD *);
+
+const char *EC_curve_nid2nist(int);
+
+int EC_GROUP_get_asn1_flag(const EC_GROUP *);
+"""
+
+CUSTOMIZATIONS = """
+#if defined(OPENSSL_NO_EC2M)
+static const long Cryptography_HAS_EC2M = 0;
+
+int (*EC_POINT_set_affine_coordinates_GF2m)(const EC_GROUP *, EC_POINT *,
+    const BIGNUM *, const BIGNUM *, BN_CTX *) = NULL;
+
+int (*EC_POINT_get_affine_coordinates_GF2m)(const EC_GROUP *,
+    const EC_POINT *, BIGNUM *, BIGNUM *, BN_CTX *) = NULL;
+
+int (*EC_POINT_set_compressed_coordinates_GF2m)(const EC_GROUP *, EC_POINT *,
+    const BIGNUM *, int, BN_CTX *) = NULL;
+#else
+static const long Cryptography_HAS_EC2M = 1;
+#endif
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/ecdh.py b/contrib/python/cryptography/py2/_cffi_src/openssl/ecdh.py
new file mode 100644
index 0000000000..c73cc9f36f
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/ecdh.py
@@ -0,0 +1,21 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/ecdh.h>
+"""
+
+TYPES = """
+"""
+
+FUNCTIONS = """
+int ECDH_compute_key(void *, size_t, const EC_POINT *, EC_KEY *,
+                     void *(*)(const void *, size_t, void *, size_t *));
+long SSL_CTX_set_ecdh_auto(SSL_CTX *, int);
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/ecdsa.py b/contrib/python/cryptography/py2/_cffi_src/openssl/ecdsa.py
new file mode 100644
index 0000000000..3134e24b61
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/ecdsa.py
@@ -0,0 +1,29 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/ecdsa.h>
+"""
+
+TYPES = """
+typedef ... ECDSA_SIG;
+
+typedef ... CRYPTO_EX_new;
+typedef ... CRYPTO_EX_dup;
+typedef ... CRYPTO_EX_free;
+"""
+
+FUNCTIONS = """
+int ECDSA_sign(int, const unsigned char *, int, unsigned char *,
+               unsigned int *, EC_KEY *);
+int ECDSA_verify(int, const unsigned char *, int, const unsigned char *, int,
+                 EC_KEY *);
+int ECDSA_size(const EC_KEY *);
+
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/engine.py b/contrib/python/cryptography/py2/_cffi_src/openssl/engine.py
new file mode 100644
index 0000000000..24cdd42a83
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/engine.py
@@ -0,0 +1,65 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/engine.h>
+"""
+
+TYPES = """
+typedef ... ENGINE;
+typedef ... UI_METHOD;
+
+static const long Cryptography_HAS_ENGINE;
+"""
+
+FUNCTIONS = """
+ENGINE *ENGINE_by_id(const char *);
+int ENGINE_init(ENGINE *);
+int ENGINE_finish(ENGINE *);
+ENGINE *ENGINE_get_default_RAND(void);
+int ENGINE_set_default_RAND(ENGINE *);
+void ENGINE_unregister_RAND(ENGINE *);
+int ENGINE_ctrl_cmd(ENGINE *, const char *, long, void *, void (*)(void), int);
+int ENGINE_free(ENGINE *);
+const char *ENGINE_get_name(const ENGINE *);
+
+// These bindings are unused by cryptography or pyOpenSSL but are present
+// for advanced users who need them.
+int ENGINE_ctrl_cmd_string(ENGINE *, const char *, const char *, int);
+void ENGINE_load_builtin_engines(void);
+EVP_PKEY *ENGINE_load_private_key(ENGINE *, const char *, UI_METHOD *, void *);
+EVP_PKEY *ENGINE_load_public_key(ENGINE *, const char *, UI_METHOD *, void *);
+"""
+
+CUSTOMIZATIONS = """
+#ifdef OPENSSL_NO_ENGINE
+static const long Cryptography_HAS_ENGINE = 0;
+
+ENGINE *(*ENGINE_by_id)(const char *) = NULL;
+int (*ENGINE_init)(ENGINE *) = NULL;
+int (*ENGINE_finish)(ENGINE *) = NULL;
+ENGINE *(*ENGINE_get_default_RAND)(void) = NULL;
+int (*ENGINE_set_default_RAND)(ENGINE *) = NULL;
+void (*ENGINE_unregister_RAND)(ENGINE *) = NULL;
+int (*ENGINE_ctrl_cmd)(ENGINE *, const char *, long, void *,
+                       void (*)(void), int) = NULL;
+
+int (*ENGINE_free)(ENGINE *) = NULL;
+const char *(*ENGINE_get_id)(const ENGINE *) = NULL;
+const char *(*ENGINE_get_name)(const ENGINE *) = NULL;
+
+int (*ENGINE_ctrl_cmd_string)(ENGINE *, const char *, const char *,
+                              int) = NULL;
+void (*ENGINE_load_builtin_engines)(void) = NULL;
+EVP_PKEY *(*ENGINE_load_private_key)(ENGINE *, const char *, UI_METHOD *,
+                                     void *) = NULL;
+EVP_PKEY *(*ENGINE_load_public_key)(ENGINE *, const char *,
+                                    UI_METHOD *, void *) = NULL;
+
+#else
+static const long Cryptography_HAS_ENGINE = 1;
+#endif
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/err.py b/contrib/python/cryptography/py2/_cffi_src/openssl/err.py
new file mode 100644
index 0000000000..0dd7414674
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/err.py
@@ -0,0 +1,49 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/err.h>
+"""
+
+TYPES = """
+static const int EVP_F_EVP_ENCRYPTFINAL_EX;
+static const int EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH;
+static const int EVP_R_BAD_DECRYPT;
+static const int EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM;
+static const int PKCS12_R_PKCS12_CIPHERFINAL_ERROR;
+static const int PEM_R_UNSUPPORTED_ENCRYPTION;
+static const int EVP_R_UNKNOWN_PBE_ALGORITHM;
+
+static const int ERR_LIB_EVP;
+static const int ERR_LIB_PEM;
+static const int ERR_LIB_ASN1;
+static const int ERR_LIB_PKCS12;
+
+static const int SSL_TLSEXT_ERR_OK;
+static const int SSL_TLSEXT_ERR_ALERT_FATAL;
+static const int SSL_TLSEXT_ERR_NOACK;
+
+static const int X509_R_CERT_ALREADY_IN_HASH_TABLE;
+"""
+
+FUNCTIONS = """
+void ERR_error_string_n(unsigned long, char *, size_t);
+const char *ERR_lib_error_string(unsigned long);
+const char *ERR_func_error_string(unsigned long);
+const char *ERR_reason_error_string(unsigned long);
+unsigned long ERR_get_error(void);
+unsigned long ERR_peek_error(void);
+void ERR_clear_error(void);
+void ERR_put_error(int, int, int, const char *, int);
+
+int ERR_GET_LIB(unsigned long);
+int ERR_GET_FUNC(unsigned long);
+int ERR_GET_REASON(unsigned long);
+
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/evp.py b/contrib/python/cryptography/py2/_cffi_src/openssl/evp.py
new file mode 100644
index 0000000000..ab7cfeb395
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/evp.py
@@ -0,0 +1,272 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/evp.h>
+"""
+
+TYPES = """
+typedef ... EVP_CIPHER;
+typedef ... EVP_CIPHER_CTX;
+typedef ... EVP_MD;
+typedef ... EVP_MD_CTX;
+
+typedef ... EVP_PKEY;
+typedef ... EVP_PKEY_CTX;
+static const int EVP_PKEY_RSA;
+static const int EVP_PKEY_DSA;
+static const int EVP_PKEY_DH;
+static const int EVP_PKEY_DHX;
+static const int EVP_PKEY_EC;
+static const int EVP_PKEY_X25519;
+static const int EVP_PKEY_ED25519;
+static const int EVP_PKEY_X448;
+static const int EVP_PKEY_ED448;
+static const int EVP_PKEY_POLY1305;
+static const int EVP_MAX_MD_SIZE;
+static const int EVP_CTRL_AEAD_SET_IVLEN;
+static const int EVP_CTRL_AEAD_GET_TAG;
+static const int EVP_CTRL_AEAD_SET_TAG;
+
+static const int Cryptography_HAS_SCRYPT;
+static const int Cryptography_HAS_EVP_PKEY_DHX;
+static const int Cryptography_HAS_EVP_PKEY_get_set_tls_encodedpoint;
+static const int Cryptography_HAS_ONESHOT_EVP_DIGEST_SIGN_VERIFY;
+static const long Cryptography_HAS_RAW_KEY;
+static const long Cryptography_HAS_EVP_DIGESTFINAL_XOF;
+"""
+
+FUNCTIONS = """
+const EVP_CIPHER *EVP_get_cipherbyname(const char *);
+int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *, int);
+int EVP_CipherInit_ex(EVP_CIPHER_CTX *, const EVP_CIPHER *, ENGINE *,
+                      const unsigned char *, const unsigned char *, int);
+int EVP_CipherUpdate(EVP_CIPHER_CTX *, unsigned char *, int *,
+                     const unsigned char *, int);
+int EVP_CipherFinal_ex(EVP_CIPHER_CTX *, unsigned char *, int *);
+int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *);
+EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void);
+void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *);
+int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *, int);
+const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *);
+
+int EVP_MD_CTX_copy_ex(EVP_MD_CTX *, const EVP_MD_CTX *);
+int EVP_DigestInit_ex(EVP_MD_CTX *, const EVP_MD *, ENGINE *);
+int EVP_DigestUpdate(EVP_MD_CTX *, const void *, size_t);
+int EVP_DigestFinal_ex(EVP_MD_CTX *, unsigned char *, unsigned int *);
+int EVP_DigestFinalXOF(EVP_MD_CTX *, unsigned char *, size_t);
+const EVP_MD *EVP_get_digestbyname(const char *);
+
+EVP_PKEY *EVP_PKEY_new(void);
+void EVP_PKEY_free(EVP_PKEY *);
+int EVP_PKEY_type(int);
+int EVP_PKEY_size(EVP_PKEY *);
+RSA *EVP_PKEY_get1_RSA(EVP_PKEY *);
+DSA *EVP_PKEY_get1_DSA(EVP_PKEY *);
+DH *EVP_PKEY_get1_DH(EVP_PKEY *);
+
+int EVP_PKEY_encrypt(EVP_PKEY_CTX *, unsigned char *, size_t *,
+                     const unsigned char *, size_t);
+int EVP_PKEY_decrypt(EVP_PKEY_CTX *, unsigned char *, size_t *,
+                     const unsigned char *, size_t);
+
+int EVP_SignInit(EVP_MD_CTX *, const EVP_MD *);
+int EVP_SignUpdate(EVP_MD_CTX *, const void *, size_t);
+int EVP_SignFinal(EVP_MD_CTX *, unsigned char *, unsigned int *, EVP_PKEY *);
+
+int EVP_VerifyInit(EVP_MD_CTX *, const EVP_MD *);
+int EVP_VerifyUpdate(EVP_MD_CTX *, const void *, size_t);
+int EVP_VerifyFinal(EVP_MD_CTX *, const unsigned char *, unsigned int,
+                    EVP_PKEY *);
+
+int EVP_DigestSignInit(EVP_MD_CTX *, EVP_PKEY_CTX **, const EVP_MD *,
+                       ENGINE *, EVP_PKEY *);
+int EVP_DigestSignUpdate(EVP_MD_CTX *, const void *, size_t);
+int EVP_DigestSignFinal(EVP_MD_CTX *, unsigned char *, size_t *);
+int EVP_DigestVerifyInit(EVP_MD_CTX *, EVP_PKEY_CTX **, const EVP_MD *,
+                         ENGINE *, EVP_PKEY *);
+
+
+
+EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *, ENGINE *);
+EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int, ENGINE *);
+EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *);
+void EVP_PKEY_CTX_free(EVP_PKEY_CTX *);
+int EVP_PKEY_sign_init(EVP_PKEY_CTX *);
+int EVP_PKEY_sign(EVP_PKEY_CTX *, unsigned char *, size_t *,
+                  const unsigned char *, size_t);
+int EVP_PKEY_verify_init(EVP_PKEY_CTX *);
+int EVP_PKEY_verify(EVP_PKEY_CTX *, const unsigned char *, size_t,
+                    const unsigned char *, size_t);
+int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *);
+int EVP_PKEY_verify_recover(EVP_PKEY_CTX *, unsigned char *,
+                            size_t *, const unsigned char *, size_t);
+int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *);
+int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *);
+
+int EVP_PKEY_set1_RSA(EVP_PKEY *, RSA *);
+int EVP_PKEY_set1_DSA(EVP_PKEY *, DSA *);
+int EVP_PKEY_set1_DH(EVP_PKEY *, DH *);
+
+int EVP_PKEY_cmp(const EVP_PKEY *, const EVP_PKEY *);
+
+int EVP_PKEY_keygen_init(EVP_PKEY_CTX *);
+int EVP_PKEY_keygen(EVP_PKEY_CTX *, EVP_PKEY **);
+int EVP_PKEY_derive_init(EVP_PKEY_CTX *);
+int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *, EVP_PKEY *);
+int EVP_PKEY_derive(EVP_PKEY_CTX *, unsigned char *, size_t *);
+int EVP_PKEY_set_type(EVP_PKEY *, int);
+
+int EVP_PKEY_id(const EVP_PKEY *);
+int Cryptography_EVP_PKEY_id(const EVP_PKEY *);
+
+EVP_MD_CTX *EVP_MD_CTX_new(void);
+void EVP_MD_CTX_free(EVP_MD_CTX *);
+/* Backwards compat aliases for pyOpenSSL */
+EVP_MD_CTX *Cryptography_EVP_MD_CTX_new(void);
+void Cryptography_EVP_MD_CTX_free(EVP_MD_CTX *);
+
+/* Added in 1.1.1 */
+int EVP_DigestSign(EVP_MD_CTX *, unsigned char *, size_t *,
+                   const unsigned char *, size_t);
+int EVP_DigestVerify(EVP_MD_CTX *, const unsigned char *, size_t,
+                     const unsigned char *, size_t);
+/* Added in 1.1.0 */
+size_t EVP_PKEY_get1_tls_encodedpoint(EVP_PKEY *, unsigned char **);
+int EVP_PKEY_set1_tls_encodedpoint(EVP_PKEY *, const unsigned char *,
+                                   size_t);
+
+/* EVP_PKEY * became const in 1.1.0 */
+int EVP_PKEY_bits(EVP_PKEY *);
+
+void OpenSSL_add_all_algorithms(void);
+int EVP_PKEY_assign_RSA(EVP_PKEY *, RSA *);
+
+EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *);
+int EVP_PKEY_set1_EC_KEY(EVP_PKEY *, EC_KEY *);
+
+int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *, int, int, void *);
+
+int PKCS5_PBKDF2_HMAC(const char *, int, const unsigned char *, int, int,
+                      const EVP_MD *, int, unsigned char *);
+
+int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *, const EVP_MD *);
+
+int EVP_PBE_scrypt(const char *, size_t, const unsigned char *, size_t,
+                   uint64_t, uint64_t, uint64_t, uint64_t, unsigned char *,
+                   size_t);
+
+EVP_PKEY *EVP_PKEY_new_raw_private_key(int, ENGINE *, const unsigned char *,
+                                       size_t);
+EVP_PKEY *EVP_PKEY_new_raw_public_key(int, ENGINE *, const unsigned char *,
+                                      size_t);
+int EVP_PKEY_get_raw_private_key(const EVP_PKEY *, unsigned char *, size_t *);
+int EVP_PKEY_get_raw_public_key(const EVP_PKEY *, unsigned char *, size_t *);
+"""
+
+CUSTOMIZATIONS = """
+#ifdef EVP_PKEY_DHX
+const long Cryptography_HAS_EVP_PKEY_DHX = 1;
+#else
+const long Cryptography_HAS_EVP_PKEY_DHX = 0;
+const long EVP_PKEY_DHX = -1;
+#endif
+
+int Cryptography_EVP_PKEY_id(const EVP_PKEY *key) {
+    return EVP_PKEY_id(key);
+}
+EVP_MD_CTX *Cryptography_EVP_MD_CTX_new(void) {
+    return EVP_MD_CTX_new();
+}
+void Cryptography_EVP_MD_CTX_free(EVP_MD_CTX *md) {
+    EVP_MD_CTX_free(md);
+}
+
+#if CRYPTOGRAPHY_IS_LIBRESSL || defined(OPENSSL_NO_SCRYPT)
+static const long Cryptography_HAS_SCRYPT = 0;
+int (*EVP_PBE_scrypt)(const char *, size_t, const unsigned char *, size_t,
+                      uint64_t, uint64_t, uint64_t, uint64_t, unsigned char *,
+                      size_t) = NULL;
+#else
+static const long Cryptography_HAS_SCRYPT = 1;
+#endif
+
+#if !CRYPTOGRAPHY_IS_LIBRESSL
+static const long Cryptography_HAS_EVP_PKEY_get_set_tls_encodedpoint = 1;
+#else
+static const long Cryptography_HAS_EVP_PKEY_get_set_tls_encodedpoint = 0;
+size_t (*EVP_PKEY_get1_tls_encodedpoint)(EVP_PKEY *, unsigned char **) = NULL;
+int (*EVP_PKEY_set1_tls_encodedpoint)(EVP_PKEY *, const unsigned char *,
+                                      size_t) = NULL;
+#endif
+
+#if CRYPTOGRAPHY_OPENSSL_LESS_THAN_111
+static const long Cryptography_HAS_ONESHOT_EVP_DIGEST_SIGN_VERIFY = 0;
+static const long Cryptography_HAS_RAW_KEY = 0;
+static const long Cryptography_HAS_EVP_DIGESTFINAL_XOF = 0;
+int (*EVP_DigestFinalXOF)(EVP_MD_CTX *, unsigned char *, size_t) = NULL;
+int (*EVP_DigestSign)(EVP_MD_CTX *, unsigned char *, size_t *,
+                      const unsigned char *tbs, size_t) = NULL;
+int (*EVP_DigestVerify)(EVP_MD_CTX *, const unsigned char *, size_t,
+                        const unsigned char *, size_t) = NULL;
+EVP_PKEY *(*EVP_PKEY_new_raw_private_key)(int, ENGINE *, const unsigned char *,
+                                       size_t) = NULL;
+EVP_PKEY *(*EVP_PKEY_new_raw_public_key)(int, ENGINE *, const unsigned char *,
+                                      size_t) = NULL;
+int (*EVP_PKEY_get_raw_private_key)(const EVP_PKEY *, unsigned char *,
+                                    size_t *) = NULL;
+int (*EVP_PKEY_get_raw_public_key)(const EVP_PKEY *, unsigned char *,
+                                   size_t *) = NULL;
+#else
+static const long Cryptography_HAS_ONESHOT_EVP_DIGEST_SIGN_VERIFY = 1;
+static const long Cryptography_HAS_RAW_KEY = 1;
+static const long Cryptography_HAS_EVP_DIGESTFINAL_XOF = 1;
+#endif
+
+/* OpenSSL 1.1.0+ does this define for us, but if not present we'll do it */
+#if !defined(EVP_CTRL_AEAD_SET_IVLEN)
+# define EVP_CTRL_AEAD_SET_IVLEN EVP_CTRL_GCM_SET_IVLEN
+#endif
+#if !defined(EVP_CTRL_AEAD_GET_TAG)
+# define EVP_CTRL_AEAD_GET_TAG EVP_CTRL_GCM_GET_TAG
+#endif
+#if !defined(EVP_CTRL_AEAD_SET_TAG)
+# define EVP_CTRL_AEAD_SET_TAG EVP_CTRL_GCM_SET_TAG
+#endif
+
+/* This is tied to X25519 support so we reuse the Cryptography_HAS_X25519
+   conditional to remove it. OpenSSL 1.1.0 didn't have this define, but
+   1.1.1 will when it is released. We can remove this in the distant
+   future when we drop 1.1.0 support. */
+#ifndef EVP_PKEY_X25519
+#define EVP_PKEY_X25519 NID_X25519
+#endif
+
+/* This is tied to X448 support so we reuse the Cryptography_HAS_X448
+   conditional to remove it. OpenSSL 1.1.1 adds this define.  We can remove
+   this in the distant future when we drop 1.1.0 support. */
+#ifndef EVP_PKEY_X448
+#define EVP_PKEY_X448 NID_X448
+#endif
+
+/* This is tied to ED25519 support so we reuse the Cryptography_HAS_ED25519
+   conditional to remove it. */
+#ifndef EVP_PKEY_ED25519
+#define EVP_PKEY_ED25519 NID_ED25519
+#endif
+
+/* This is tied to ED448 support so we reuse the Cryptography_HAS_ED448
+   conditional to remove it. */
+#ifndef EVP_PKEY_ED448
+#define EVP_PKEY_ED448 NID_ED448
+#endif
+
+/* This is tied to poly1305 support so we reuse the Cryptography_HAS_POLY1305
+   conditional to remove it. */
+#ifndef EVP_PKEY_POLY1305
+#define EVP_PKEY_POLY1305 NID_poly1305
+#endif
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/fips.py b/contrib/python/cryptography/py2/_cffi_src/openssl/fips.py
new file mode 100644
index 0000000000..c92bca494b
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/fips.py
@@ -0,0 +1,28 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/crypto.h>
+"""
+
+TYPES = """
+static const long Cryptography_HAS_FIPS;
+"""
+
+FUNCTIONS = """
+int FIPS_mode_set(int);
+int FIPS_mode(void);
+"""
+
+CUSTOMIZATIONS = """
+#if CRYPTOGRAPHY_IS_LIBRESSL
+static const long Cryptography_HAS_FIPS = 0;
+int (*FIPS_mode_set)(int) = NULL;
+int (*FIPS_mode)(void) = NULL;
+#else
+static const long Cryptography_HAS_FIPS = 1;
+#endif
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/hmac.py b/contrib/python/cryptography/py2/_cffi_src/openssl/hmac.py
new file mode 100644
index 0000000000..2e0e33ffe3
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/hmac.py
@@ -0,0 +1,26 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/hmac.h>
+"""
+
+TYPES = """
+typedef ... HMAC_CTX;
+"""
+
+FUNCTIONS = """
+int HMAC_Init_ex(HMAC_CTX *, const void *, int, const EVP_MD *, ENGINE *);
+int HMAC_Update(HMAC_CTX *, const unsigned char *, size_t);
+int HMAC_Final(HMAC_CTX *, unsigned char *, unsigned int *);
+int HMAC_CTX_copy(HMAC_CTX *, HMAC_CTX *);
+
+HMAC_CTX *HMAC_CTX_new(void);
+void HMAC_CTX_free(HMAC_CTX *ctx);
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/nid.py b/contrib/python/cryptography/py2/_cffi_src/openssl/nid.py
new file mode 100644
index 0000000000..9ef88cdbbd
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/nid.py
@@ -0,0 +1,52 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/obj_mac.h>
+"""
+
+TYPES = """
+static const int Cryptography_HAS_ED448;
+static const int Cryptography_HAS_ED25519;
+static const int Cryptography_HAS_POLY1305;
+
+static const int NID_undef;
+static const int NID_pbe_WithSHA1And3_Key_TripleDES_CBC;
+static const int NID_X25519;
+static const int NID_X448;
+static const int NID_ED25519;
+static const int NID_ED448;
+static const int NID_poly1305;
+
+static const int NID_subject_alt_name;
+static const int NID_crl_reason;
+
+static const int NID_pkcs7_signed;
+"""
+
+FUNCTIONS = """
+"""
+
+CUSTOMIZATIONS = """
+#ifndef NID_ED25519
+static const long Cryptography_HAS_ED25519 = 0;
+static const int NID_ED25519 = 0;
+#else
+static const long Cryptography_HAS_ED25519 = 1;
+#endif
+#ifndef NID_ED448
+static const long Cryptography_HAS_ED448 = 0;
+static const int NID_ED448 = 0;
+#else
+static const long Cryptography_HAS_ED448 = 1;
+#endif
+#ifndef NID_poly1305
+static const long Cryptography_HAS_POLY1305 = 0;
+static const int NID_poly1305 = 0;
+#else
+static const long Cryptography_HAS_POLY1305 = 1;
+#endif
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/objects.py b/contrib/python/cryptography/py2/_cffi_src/openssl/objects.py
new file mode 100644
index 0000000000..236903d986
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/objects.py
@@ -0,0 +1,33 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/objects.h>
+"""
+
+TYPES = """
+typedef struct {
+    int type;
+    int alias;
+    const char *name;
+    const char *data;
+} OBJ_NAME;
+
+static const long OBJ_NAME_TYPE_MD_METH;
+"""
+
+FUNCTIONS = """
+const char *OBJ_nid2ln(int);
+const char *OBJ_nid2sn(int);
+int OBJ_obj2nid(const ASN1_OBJECT *);
+int OBJ_sn2nid(const char *);
+int OBJ_txt2nid(const char *);
+ASN1_OBJECT *OBJ_txt2obj(const char *, int);
+int OBJ_obj2txt(char *, int, const ASN1_OBJECT *, int);
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/ocsp.py b/contrib/python/cryptography/py2/_cffi_src/openssl/ocsp.py
new file mode 100644
index 0000000000..c3d034c2c4
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/ocsp.py
@@ -0,0 +1,166 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/ocsp.h>
+"""
+
+TYPES = """
+typedef ... OCSP_REQUEST;
+typedef ... OCSP_ONEREQ;
+typedef ... OCSP_RESPONSE;
+typedef ... OCSP_BASICRESP;
+typedef ... OCSP_SINGLERESP;
+typedef ... OCSP_CERTID;
+typedef ... OCSP_RESPDATA;
+static const long OCSP_NOCERTS;
+static const long OCSP_RESPID_KEY;
+"""
+
+FUNCTIONS = """
+int OCSP_response_status(OCSP_RESPONSE *);
+OCSP_BASICRESP *OCSP_response_get1_basic(OCSP_RESPONSE *);
+int OCSP_BASICRESP_get_ext_count(OCSP_BASICRESP *);
+const ASN1_OCTET_STRING *OCSP_resp_get0_signature(const OCSP_BASICRESP *);
+Cryptography_STACK_OF_X509 *OCSP_resp_get0_certs(const OCSP_BASICRESP *);
+const ASN1_GENERALIZEDTIME *OCSP_resp_get0_produced_at(
+    const OCSP_BASICRESP *);
+const OCSP_CERTID *OCSP_SINGLERESP_get0_id(const OCSP_SINGLERESP *);
+int OCSP_resp_get0_id(const OCSP_BASICRESP *, const ASN1_OCTET_STRING **,
+                      const X509_NAME **);
+const X509_ALGOR *OCSP_resp_get0_tbs_sigalg(const OCSP_BASICRESP *);
+const OCSP_RESPDATA *OCSP_resp_get0_respdata(const OCSP_BASICRESP *);
+X509_EXTENSION *OCSP_BASICRESP_get_ext(OCSP_BASICRESP *, int);
+int OCSP_resp_count(OCSP_BASICRESP *);
+OCSP_SINGLERESP *OCSP_resp_get0(OCSP_BASICRESP *, int);
+int OCSP_SINGLERESP_get_ext_count(OCSP_SINGLERESP *);
+X509_EXTENSION *OCSP_SINGLERESP_get_ext(OCSP_SINGLERESP *, int);
+
+int OCSP_single_get0_status(OCSP_SINGLERESP *, int *, ASN1_GENERALIZEDTIME **,
+                            ASN1_GENERALIZEDTIME **, ASN1_GENERALIZEDTIME **);
+
+int OCSP_REQUEST_get_ext_count(OCSP_REQUEST *);
+X509_EXTENSION *OCSP_REQUEST_get_ext(OCSP_REQUEST *, int);
+int OCSP_request_onereq_count(OCSP_REQUEST *);
+OCSP_ONEREQ *OCSP_request_onereq_get0(OCSP_REQUEST *, int);
+OCSP_CERTID *OCSP_onereq_get0_id(OCSP_ONEREQ *);
+OCSP_ONEREQ *OCSP_request_add0_id(OCSP_REQUEST *, OCSP_CERTID *);
+OCSP_CERTID *OCSP_cert_to_id(const EVP_MD *, const X509 *, const X509 *);
+void OCSP_CERTID_free(OCSP_CERTID *);
+
+
+OCSP_BASICRESP *OCSP_BASICRESP_new(void);
+void OCSP_BASICRESP_free(OCSP_BASICRESP *);
+OCSP_SINGLERESP *OCSP_basic_add1_status(OCSP_BASICRESP *, OCSP_CERTID *, int,
+                                        int, ASN1_TIME *, ASN1_TIME *,
+                                        ASN1_TIME *);
+int OCSP_basic_add1_cert(OCSP_BASICRESP *, X509 *);
+int OCSP_BASICRESP_add_ext(OCSP_BASICRESP *, X509_EXTENSION *, int);
+int OCSP_basic_sign(OCSP_BASICRESP *, X509 *, EVP_PKEY *, const EVP_MD *,
+                    Cryptography_STACK_OF_X509 *, unsigned long);
+OCSP_RESPONSE *OCSP_response_create(int, OCSP_BASICRESP *);
+void OCSP_RESPONSE_free(OCSP_RESPONSE *);
+
+OCSP_REQUEST *OCSP_REQUEST_new(void);
+void OCSP_REQUEST_free(OCSP_REQUEST *);
+int OCSP_REQUEST_add_ext(OCSP_REQUEST *, X509_EXTENSION *, int);
+int OCSP_id_get0_info(ASN1_OCTET_STRING **, ASN1_OBJECT **,
+                      ASN1_OCTET_STRING **, ASN1_INTEGER **, OCSP_CERTID *);
+OCSP_REQUEST *d2i_OCSP_REQUEST_bio(BIO *, OCSP_REQUEST **);
+OCSP_RESPONSE *d2i_OCSP_RESPONSE_bio(BIO *, OCSP_RESPONSE **);
+int i2d_OCSP_REQUEST_bio(BIO *, OCSP_REQUEST *);
+int i2d_OCSP_RESPONSE_bio(BIO *, OCSP_RESPONSE *);
+int i2d_OCSP_RESPDATA(OCSP_RESPDATA *, unsigned char **);
+"""
+
+CUSTOMIZATIONS = """
+#if ( \
+    !CRYPTOGRAPHY_IS_LIBRESSL && \
+    CRYPTOGRAPHY_OPENSSL_LESS_THAN_110J \
+    )
+/* These structs come from ocsp_lcl.h and are needed to de-opaque the struct
+   for the getters in OpenSSL 1.1.0 through 1.1.0i */
+struct ocsp_responder_id_st {
+    int type;
+    union {
+        X509_NAME *byName;
+        ASN1_OCTET_STRING *byKey;
+    } value;
+};
+struct ocsp_response_data_st {
+    ASN1_INTEGER *version;
+    OCSP_RESPID responderId;
+    ASN1_GENERALIZEDTIME *producedAt;
+    STACK_OF(OCSP_SINGLERESP) *responses;
+    STACK_OF(X509_EXTENSION) *responseExtensions;
+};
+struct ocsp_basic_response_st {
+    OCSP_RESPDATA tbsResponseData;
+    X509_ALGOR signatureAlgorithm;
+    ASN1_BIT_STRING *signature;
+    STACK_OF(X509) *certs;
+};
+#endif
+
+#if CRYPTOGRAPHY_IS_LIBRESSL
+/* These functions are all taken from ocsp_cl.c in OpenSSL 1.1.0 */
+const OCSP_CERTID *OCSP_SINGLERESP_get0_id(const OCSP_SINGLERESP *single)
+{
+    return single->certId;
+}
+const Cryptography_STACK_OF_X509 *OCSP_resp_get0_certs(
+    const OCSP_BASICRESP *bs)
+{
+    return bs->certs;
+}
+int OCSP_resp_get0_id(const OCSP_BASICRESP *bs,
+                      const ASN1_OCTET_STRING **pid,
+                      const X509_NAME **pname)
+{
+    const OCSP_RESPID *rid = bs->tbsResponseData->responderId;
+
+    if (rid->type == V_OCSP_RESPID_NAME) {
+        *pname = rid->value.byName;
+        *pid = NULL;
+    } else if (rid->type == V_OCSP_RESPID_KEY) {
+        *pid = rid->value.byKey;
+        *pname = NULL;
+    } else {
+        return 0;
+    }
+    return 1;
+}
+const ASN1_GENERALIZEDTIME *OCSP_resp_get0_produced_at(
+    const OCSP_BASICRESP* bs)
+{
+    return bs->tbsResponseData->producedAt;
+}
+const ASN1_OCTET_STRING *OCSP_resp_get0_signature(const OCSP_BASICRESP *bs)
+{
+    return bs->signature;
+}
+#endif
+
+#if CRYPTOGRAPHY_OPENSSL_LESS_THAN_110J
+const X509_ALGOR *OCSP_resp_get0_tbs_sigalg(const OCSP_BASICRESP *bs)
+{
+#if CRYPTOGRAPHY_IS_LIBRESSL
+    return bs->signatureAlgorithm;
+#else
+    return &bs->signatureAlgorithm;
+#endif
+}
+
+const OCSP_RESPDATA *OCSP_resp_get0_respdata(const OCSP_BASICRESP *bs)
+{
+#if CRYPTOGRAPHY_IS_LIBRESSL
+    return bs->tbsResponseData;
+#else
+    return &bs->tbsResponseData;
+#endif
+}
+#endif
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/opensslv.py b/contrib/python/cryptography/py2/_cffi_src/openssl/opensslv.py
new file mode 100644
index 0000000000..9b0c689338
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/opensslv.py
@@ -0,0 +1,22 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/opensslv.h>
+"""
+
+TYPES = """
+/* Note that these will be resolved when cryptography is compiled and are NOT
+   guaranteed to be the version that it actually loads. */
+static const int OPENSSL_VERSION_NUMBER;
+static const char *const OPENSSL_VERSION_TEXT;
+"""
+
+FUNCTIONS = """
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/osrandom_engine.py b/contrib/python/cryptography/py2/_cffi_src/openssl/osrandom_engine.py
new file mode 100644
index 0000000000..ed1068ef8a
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/osrandom_engine.py
@@ -0,0 +1,24 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+import os
+
+HERE = os.path.dirname(os.path.abspath(__file__))
+
+with open(os.path.join(HERE, "src/osrandom_engine.h")) as f:
+    INCLUDES = f.read()
+
+TYPES = """
+static const char *const Cryptography_osrandom_engine_name;
+static const char *const Cryptography_osrandom_engine_id;
+"""
+
+FUNCTIONS = """
+int Cryptography_add_osrandom_engine(void);
+"""
+
+with open(os.path.join(HERE, "src/osrandom_engine.c")) as f:
+    CUSTOMIZATIONS = f.read()
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/pem.py b/contrib/python/cryptography/py2/_cffi_src/openssl/pem.py
new file mode 100644
index 0000000000..3f279c4fff
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/pem.py
@@ -0,0 +1,75 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/pem.h>
+"""
+
+TYPES = """
+typedef int pem_password_cb(char *buf, int size, int rwflag, void *userdata);
+"""
+
+FUNCTIONS = """
+X509 *PEM_read_bio_X509(BIO *, X509 **, pem_password_cb *, void *);
+int PEM_write_bio_X509(BIO *, X509 *);
+
+int PEM_write_bio_PrivateKey(BIO *, EVP_PKEY *, const EVP_CIPHER *,
+                             unsigned char *, int, pem_password_cb *, void *);
+
+EVP_PKEY *PEM_read_bio_PrivateKey(BIO *, EVP_PKEY **, pem_password_cb *,
+                                 void *);
+
+int PEM_write_bio_PKCS8PrivateKey(BIO *, EVP_PKEY *, const EVP_CIPHER *,
+                                  char *, int, pem_password_cb *, void *);
+
+int i2d_PKCS8PrivateKey_bio(BIO *, EVP_PKEY *, const EVP_CIPHER *,
+                            char *, int, pem_password_cb *, void *);
+
+int i2d_PKCS7_bio(BIO *, PKCS7 *);
+PKCS7 *d2i_PKCS7_bio(BIO *, PKCS7 **);
+
+EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *, EVP_PKEY **, pem_password_cb *,
+                                  void *);
+
+int PEM_write_bio_X509_REQ(BIO *, X509_REQ *);
+
+X509_REQ *PEM_read_bio_X509_REQ(BIO *, X509_REQ **, pem_password_cb *, void *);
+
+X509_CRL *PEM_read_bio_X509_CRL(BIO *, X509_CRL **, pem_password_cb *, void *);
+
+int PEM_write_bio_X509_CRL(BIO *, X509_CRL *);
+
+PKCS7 *PEM_read_bio_PKCS7(BIO *, PKCS7 **, pem_password_cb *, void *);
+int PEM_write_bio_PKCS7(BIO *, PKCS7 *);
+
+DH *PEM_read_bio_DHparams(BIO *, DH **, pem_password_cb *, void *);
+
+int PEM_write_bio_DSAPrivateKey(BIO *, DSA *, const EVP_CIPHER *,
+                                unsigned char *, int,
+                                pem_password_cb *, void *);
+
+int PEM_write_bio_RSAPrivateKey(BIO *, RSA *, const EVP_CIPHER *,
+                                unsigned char *, int,
+                                pem_password_cb *, void *);
+
+RSA *PEM_read_bio_RSAPublicKey(BIO *, RSA **, pem_password_cb *, void *);
+
+int PEM_write_bio_RSAPublicKey(BIO *, const RSA *);
+
+EVP_PKEY *PEM_read_bio_PUBKEY(BIO *, EVP_PKEY **, pem_password_cb *, void *);
+int PEM_write_bio_PUBKEY(BIO *, EVP_PKEY *);
+int PEM_write_bio_ECPrivateKey(BIO *, EC_KEY *, const EVP_CIPHER *,
+                               unsigned char *, int, pem_password_cb *,
+                               void *);
+int PEM_write_bio_DHparams(BIO *, DH *);
+int PEM_write_bio_DHxparams(BIO *, DH *);
+"""
+
+CUSTOMIZATIONS = """
+#if !defined(EVP_PKEY_DHX) || EVP_PKEY_DHX == -1
+int (*PEM_write_bio_DHxparams)(BIO *, DH *) = NULL;
+#endif
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/pkcs12.py b/contrib/python/cryptography/py2/_cffi_src/openssl/pkcs12.py
new file mode 100644
index 0000000000..21a8481faa
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/pkcs12.py
@@ -0,0 +1,27 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/pkcs12.h>
+"""
+
+TYPES = """
+typedef ... PKCS12;
+"""
+
+FUNCTIONS = """
+void PKCS12_free(PKCS12 *);
+
+PKCS12 *d2i_PKCS12_bio(BIO *, PKCS12 **);
+int i2d_PKCS12_bio(BIO *, PKCS12 *);
+int PKCS12_parse(PKCS12 *, const char *, EVP_PKEY **, X509 **,
+                 Cryptography_STACK_OF_X509 **);
+PKCS12 *PKCS12_create(char *, char *, EVP_PKEY *, X509 *,
+                      Cryptography_STACK_OF_X509 *, int, int, int, int, int);
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/pkcs7.py b/contrib/python/cryptography/py2/_cffi_src/openssl/pkcs7.py
new file mode 100644
index 0000000000..c22263dfe6
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/pkcs7.py
@@ -0,0 +1,79 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/pkcs7.h>
+"""
+
+TYPES = """
+typedef struct {
+    Cryptography_STACK_OF_X509 *cert;
+    Cryptography_STACK_OF_X509_CRL *crl;
+    ...;
+} PKCS7_SIGNED;
+
+typedef struct {
+    Cryptography_STACK_OF_X509 *cert;
+    Cryptography_STACK_OF_X509_CRL *crl;
+    ...;
+} PKCS7_SIGN_ENVELOPE;
+
+typedef ... PKCS7_DIGEST;
+typedef ... PKCS7_ENCRYPT;
+typedef ... PKCS7_ENVELOPE;
+typedef ... PKCS7_SIGNER_INFO;
+
+typedef struct {
+    ASN1_OBJECT *type;
+    union {
+        char *ptr;
+        ASN1_OCTET_STRING *data;
+        PKCS7_SIGNED *sign;
+        PKCS7_ENVELOPE *enveloped;
+        PKCS7_SIGN_ENVELOPE *signed_and_enveloped;
+        PKCS7_DIGEST *digest;
+        PKCS7_ENCRYPT *encrypted;
+        ASN1_TYPE *other;
+     } d;
+    ...;
+} PKCS7;
+
+static const int PKCS7_BINARY;
+static const int PKCS7_DETACHED;
+static const int PKCS7_NOATTR;
+static const int PKCS7_NOCERTS;
+static const int PKCS7_NOCHAIN;
+static const int PKCS7_NOINTERN;
+static const int PKCS7_NOSIGS;
+static const int PKCS7_NOSMIMECAP;
+static const int PKCS7_NOVERIFY;
+static const int PKCS7_STREAM;
+static const int PKCS7_TEXT;
+static const int PKCS7_PARTIAL;
+"""
+
+FUNCTIONS = """
+void PKCS7_free(PKCS7 *);
+PKCS7 *PKCS7_sign(X509 *, EVP_PKEY *, Cryptography_STACK_OF_X509 *,
+                   BIO *, int);
+int SMIME_write_PKCS7(BIO *, PKCS7 *, BIO *, int);
+int PEM_write_bio_PKCS7_stream(BIO *, PKCS7 *, BIO *, int);
+PKCS7_SIGNER_INFO *PKCS7_sign_add_signer(PKCS7 *, X509 *, EVP_PKEY *,
+                                         const EVP_MD *, int);
+int PKCS7_final(PKCS7 *, BIO *, int);
+/* Included verify due to external consumer, see
+   https://github.com/pyca/cryptography/issues/5433 */
+int PKCS7_verify(PKCS7 *, Cryptography_STACK_OF_X509 *, X509_STORE *, BIO *,
+                 BIO *, int);
+PKCS7 *SMIME_read_PKCS7(BIO *, BIO **);
+
+int PKCS7_type_is_signed(PKCS7 *);
+int PKCS7_type_is_enveloped(PKCS7 *);
+int PKCS7_type_is_signedAndEnveloped(PKCS7 *);
+int PKCS7_type_is_data(PKCS7 *);
+"""
+
+CUSTOMIZATIONS = ""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/rand.py b/contrib/python/cryptography/py2/_cffi_src/openssl/rand.py
new file mode 100644
index 0000000000..1bc2ec0bc3
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/rand.py
@@ -0,0 +1,28 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/rand.h>
+"""
+
+TYPES = """
+typedef ... RAND_METHOD;
+"""
+
+FUNCTIONS = """
+int RAND_set_rand_method(const RAND_METHOD *);
+void RAND_add(const void *, int, double);
+int RAND_status(void);
+int RAND_bytes(unsigned char *, int);
+/* ERR_load_RAND_strings started returning an int in 1.1.0. Unfortunately we
+   can't declare a conditional signature like that. Since it always returns
+   1 we'll just lie about the signature to preserve compatibility for
+   pyOpenSSL (which calls this in its rand.py as of mid-2016) */
+void ERR_load_RAND_strings(void);
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/rsa.py b/contrib/python/cryptography/py2/_cffi_src/openssl/rsa.py
new file mode 100644
index 0000000000..92b8fa4600
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/rsa.py
@@ -0,0 +1,61 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/rsa.h>
+"""
+
+TYPES = """
+typedef ... RSA;
+typedef ... BN_GENCB;
+static const int RSA_PKCS1_PADDING;
+static const int RSA_NO_PADDING;
+static const int RSA_PKCS1_OAEP_PADDING;
+static const int RSA_PKCS1_PSS_PADDING;
+static const int RSA_F4;
+
+static const int Cryptography_HAS_RSA_OAEP_MD;
+static const int Cryptography_HAS_RSA_OAEP_LABEL;
+"""
+
+FUNCTIONS = """
+RSA *RSA_new(void);
+void RSA_free(RSA *);
+int RSA_generate_key_ex(RSA *, int, BIGNUM *, BN_GENCB *);
+int RSA_check_key(const RSA *);
+RSA *RSAPublicKey_dup(RSA *);
+int RSA_blinding_on(RSA *, BN_CTX *);
+int RSA_print(BIO *, const RSA *, int);
+
+/* added in 1.1.0 when the RSA struct was opaqued */
+int RSA_set0_key(RSA *, BIGNUM *, BIGNUM *, BIGNUM *);
+int RSA_set0_factors(RSA *, BIGNUM *, BIGNUM *);
+int RSA_set0_crt_params(RSA *, BIGNUM *, BIGNUM *, BIGNUM *);
+void RSA_get0_key(const RSA *, const BIGNUM **, const BIGNUM **,
+                  const BIGNUM **);
+void RSA_get0_factors(const RSA *, const BIGNUM **, const BIGNUM **);
+void RSA_get0_crt_params(const RSA *, const BIGNUM **, const BIGNUM **,
+                         const BIGNUM **);
+int EVP_PKEY_CTX_set_rsa_padding(EVP_PKEY_CTX *, int);
+int EVP_PKEY_CTX_set_rsa_pss_saltlen(EVP_PKEY_CTX *, int);
+int EVP_PKEY_CTX_set_rsa_mgf1_md(EVP_PKEY_CTX *, EVP_MD *);
+int EVP_PKEY_CTX_set0_rsa_oaep_label(EVP_PKEY_CTX *, unsigned char *, int);
+
+int EVP_PKEY_CTX_set_rsa_oaep_md(EVP_PKEY_CTX *, EVP_MD *);
+"""
+
+CUSTOMIZATIONS = """
+#if !CRYPTOGRAPHY_IS_LIBRESSL
+static const long Cryptography_HAS_RSA_OAEP_MD = 1;
+static const long Cryptography_HAS_RSA_OAEP_LABEL = 1;
+#else
+static const long Cryptography_HAS_RSA_OAEP_MD = 0;
+static const long Cryptography_HAS_RSA_OAEP_LABEL = 0;
+int (*EVP_PKEY_CTX_set_rsa_oaep_md)(EVP_PKEY_CTX *, EVP_MD *) = NULL;
+int (*EVP_PKEY_CTX_set0_rsa_oaep_label)(EVP_PKEY_CTX *, unsigned char *,
+                                        int) = NULL;
+#endif
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/src/osrandom_engine.c b/contrib/python/cryptography/py2/_cffi_src/openssl/src/osrandom_engine.c
new file mode 100644
index 0000000000..a84857b86d
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/src/osrandom_engine.c
@@ -0,0 +1,660 @@
+/* osurandom engine
+ *
+ * Windows         CryptGenRandom()
+ * macOS >= 10.12  getentropy()
+ * OpenBSD 5.6+    getentropy()
+ * other BSD       getentropy() if SYS_getentropy is defined
+ * Linux 3.17+     getrandom() with fallback to /dev/urandom
+ * other           /dev/urandom with cached fd
+ *
+ * The /dev/urandom, getrandom and getentropy code is derived from Python's
+ * Python/random.c, written by Antoine Pitrou and Victor Stinner.
+ *
+ * Copyright 2001-2016 Python Software Foundation; All Rights Reserved.
+ */
+
+#ifdef __linux__
+#include <poll.h>
+#endif
+
+#if CRYPTOGRAPHY_NEEDS_OSRANDOM_ENGINE
+/* OpenSSL has ENGINE support and is older than 1.1.1d (the first version that
+ * properly implements fork safety in its RNG) so build the engine. */
+static const char *Cryptography_osrandom_engine_id = "osrandom";
+
+/****************************************************************************
+ * Windows
+ */
+#if CRYPTOGRAPHY_OSRANDOM_ENGINE == CRYPTOGRAPHY_OSRANDOM_ENGINE_CRYPTGENRANDOM
+static const char *Cryptography_osrandom_engine_name = "osrandom_engine CryptGenRandom()";
+static HCRYPTPROV hCryptProv = 0;
+
+static int osrandom_init(ENGINE *e) {
+    if (hCryptProv != 0) {
+        return 1;
+    }
+    if (CryptAcquireContext(&hCryptProv, NULL, NULL,
+                            PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) {
+        return 1;
+    } else {
+        ERR_Cryptography_OSRandom_error(
+            CRYPTOGRAPHY_OSRANDOM_F_INIT,
+            CRYPTOGRAPHY_OSRANDOM_R_CRYPTACQUIRECONTEXT,
+            __FILE__, __LINE__
+        );
+        return 0;
+    }
+}
+
+static int osrandom_rand_bytes(unsigned char *buffer, int size) {
+    if (hCryptProv == 0) {
+        return 0;
+    }
+
+    if (!CryptGenRandom(hCryptProv, (DWORD)size, buffer)) {
+        ERR_Cryptography_OSRandom_error(
+            CRYPTOGRAPHY_OSRANDOM_F_RAND_BYTES,
+            CRYPTOGRAPHY_OSRANDOM_R_CRYPTGENRANDOM,
+            __FILE__, __LINE__
+        );
+        return 0;
+    }
+    return 1;
+}
+
+static int osrandom_finish(ENGINE *e) {
+    if (CryptReleaseContext(hCryptProv, 0)) {
+        hCryptProv = 0;
+        return 1;
+    } else {
+        ERR_Cryptography_OSRandom_error(
+            CRYPTOGRAPHY_OSRANDOM_F_FINISH,
+            CRYPTOGRAPHY_OSRANDOM_R_CRYPTRELEASECONTEXT,
+            __FILE__, __LINE__
+        );
+        return 0;
+    }
+}
+
+static int osrandom_rand_status(void) {
+    return hCryptProv != 0;
+}
+
+static const char *osurandom_get_implementation(void) {
+    return "CryptGenRandom";
+}
+
+#endif /* CRYPTOGRAPHY_OSRANDOM_ENGINE_CRYPTGENRANDOM */
+
+/****************************************************************************
+ * /dev/urandom helpers for all non-BSD Unix platforms
+ */
+#ifdef CRYPTOGRAPHY_OSRANDOM_NEEDS_DEV_URANDOM
+
+static struct {
+    int fd;
+    dev_t st_dev;
+    ino_t st_ino;
+} urandom_cache = { -1 };
+
+static int open_cloexec(const char *path) {
+    int open_flags = O_RDONLY;
+#ifdef O_CLOEXEC
+    open_flags |= O_CLOEXEC;
+#endif
+
+    int fd = open(path, open_flags);
+    if (fd == -1) {
+        return -1;
+    }
+
+#ifndef O_CLOEXEC
+    int flags = fcntl(fd, F_GETFD);
+    if (flags == -1) {
+        return -1;
+    }
+    if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1) {
+        return -1;
+    }
+#endif
+    return fd;
+}
+
+#ifdef __linux__
+/* On Linux, we open("/dev/random") and use poll() to wait until it's readable
+ * before we read from /dev/urandom, this ensures that we don't read from
+ * /dev/urandom before the kernel CSPRNG is initialized. This isn't necessary on
+ * other platforms because they don't have the same _bug_ as Linux does with
+ * /dev/urandom and early boot. */
+static int wait_on_devrandom(void) {
+    struct pollfd pfd = {};
+    int ret = 0;
+    int random_fd = open_cloexec("/dev/random");
+    if (random_fd < 0) {
+        return -1;
+    }
+    pfd.fd = random_fd;
+    pfd.events = POLLIN;
+    pfd.revents = 0;
+    do {
+        ret = poll(&pfd, 1, -1);
+    } while (ret < 0 && (errno == EINTR || errno == EAGAIN));
+    close(random_fd);
+    return ret;
+}
+#endif
+
+/* return -1 on error */
+static int dev_urandom_fd(void) {
+    int fd = -1;
+    struct stat st;
+
+    /* Check that fd still points to the correct device */
+    if (urandom_cache.fd >= 0) {
+        if (fstat(urandom_cache.fd, &st)
+                || st.st_dev != urandom_cache.st_dev
+                || st.st_ino != urandom_cache.st_ino) {
+            /* Somebody replaced our FD. Invalidate our cache but don't
+             * close the fd. */
+            urandom_cache.fd = -1;
+        }
+    }
+    if (urandom_cache.fd < 0) {
+#ifdef __linux__
+        if (wait_on_devrandom() < 0) {
+            goto error;
+        }
+#endif
+
+        fd = open_cloexec("/dev/urandom");
+        if (fd < 0) {
+            goto error;
+        }
+        if (fstat(fd, &st)) {
+            goto error;
+        }
+        /* Another thread initialized the fd */
+        if (urandom_cache.fd >= 0) {
+            close(fd);
+            return urandom_cache.fd;
+        }
+        urandom_cache.st_dev = st.st_dev;
+        urandom_cache.st_ino = st.st_ino;
+        urandom_cache.fd = fd;
+    }
+    return urandom_cache.fd;
+
+  error:
+    if (fd != -1) {
+        close(fd);
+    }
+    ERR_Cryptography_OSRandom_error(
+        CRYPTOGRAPHY_OSRANDOM_F_DEV_URANDOM_FD,
+        CRYPTOGRAPHY_OSRANDOM_R_DEV_URANDOM_OPEN_FAILED,
+        __FILE__, __LINE__
+    );
+    return -1;
+}
+
+static int dev_urandom_read(unsigned char *buffer, int size) {
+    int fd;
+    int n;
+
+    fd = dev_urandom_fd();
+    if (fd < 0) {
+        return 0;
+    }
+
+    while (size > 0) {
+        do {
+            n = (int)read(fd, buffer, (size_t)size);
+        } while (n < 0 && errno == EINTR);
+
+        if (n <= 0) {
+            ERR_Cryptography_OSRandom_error(
+                CRYPTOGRAPHY_OSRANDOM_F_DEV_URANDOM_READ,
+                CRYPTOGRAPHY_OSRANDOM_R_DEV_URANDOM_READ_FAILED,
+                __FILE__, __LINE__
+            );
+            return 0;
+        }
+        buffer += n;
+        size -= n;
+    }
+    return 1;
+}
+
+static void dev_urandom_close(void) {
+    if (urandom_cache.fd >= 0) {
+        int fd;
+        struct stat st;
+
+        if (fstat(urandom_cache.fd, &st)
+                && st.st_dev == urandom_cache.st_dev
+                && st.st_ino == urandom_cache.st_ino) {
+            fd = urandom_cache.fd;
+            urandom_cache.fd = -1;
+            close(fd);
+        }
+    }
+}
+#endif /* CRYPTOGRAPHY_OSRANDOM_NEEDS_DEV_URANDOM */
+
+/****************************************************************************
+ * BSD getentropy
+ */
+#if CRYPTOGRAPHY_OSRANDOM_ENGINE == CRYPTOGRAPHY_OSRANDOM_ENGINE_GETENTROPY
+static const char *Cryptography_osrandom_engine_name = "osrandom_engine getentropy()";
+
+static int getentropy_works = CRYPTOGRAPHY_OSRANDOM_GETENTROPY_NOT_INIT;
+
+static int osrandom_init(ENGINE *e) {
+#if !defined(__APPLE__)
+    getentropy_works = CRYPTOGRAPHY_OSRANDOM_GETENTROPY_WORKS;
+#else
+    if (__builtin_available(macOS 10.12, *)) {
+        getentropy_works = CRYPTOGRAPHY_OSRANDOM_GETENTROPY_WORKS;
+    } else {
+        getentropy_works = CRYPTOGRAPHY_OSRANDOM_GETENTROPY_FALLBACK;
+        int fd = dev_urandom_fd();
+        if (fd < 0) {
+            return 0;
+        }
+    }
+#endif
+    return 1;
+}
+
+static int osrandom_rand_bytes(unsigned char *buffer, int size) {
+    int len;
+    int res;
+
+    switch(getentropy_works) {
+#if defined(__APPLE__)
+    case CRYPTOGRAPHY_OSRANDOM_GETENTROPY_FALLBACK:
+        return dev_urandom_read(buffer, size);
+#endif
+    case CRYPTOGRAPHY_OSRANDOM_GETENTROPY_WORKS:
+        while (size > 0) {
+            /* OpenBSD and macOS restrict maximum buffer size to 256. */
+            len = size > 256 ? 256 : size;
+/* on mac, availability is already checked using `__builtin_available` above */
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunguarded-availability"
+            res = getentropy(buffer, (size_t)len);
+#pragma clang diagnostic pop
+            if (res < 0) {
+                ERR_Cryptography_OSRandom_error(
+                    CRYPTOGRAPHY_OSRANDOM_F_RAND_BYTES,
+                    CRYPTOGRAPHY_OSRANDOM_R_GETENTROPY_FAILED,
+                    __FILE__, __LINE__
+                );
+                return 0;
+            }
+            buffer += len;
+            size -= len;
+        }
+        return 1;
+    }
+    __builtin_unreachable();
+}
+
+static int osrandom_finish(ENGINE *e) {
+    return 1;
+}
+
+static int osrandom_rand_status(void) {
+    return 1;
+}
+
+static const char *osurandom_get_implementation(void) {
+    switch(getentropy_works) {
+    case CRYPTOGRAPHY_OSRANDOM_GETENTROPY_FALLBACK:
+        return "/dev/urandom";
+    case CRYPTOGRAPHY_OSRANDOM_GETENTROPY_WORKS:
+        return "getentropy";
+    }
+    __builtin_unreachable();
+}
+#endif /* CRYPTOGRAPHY_OSRANDOM_ENGINE_GETENTROPY */
+
+/****************************************************************************
+ * Linux getrandom engine with fallback to dev_urandom
+ */
+
+#if CRYPTOGRAPHY_OSRANDOM_ENGINE == CRYPTOGRAPHY_OSRANDOM_ENGINE_GETRANDOM
+static const char *Cryptography_osrandom_engine_name = "osrandom_engine getrandom()";
+
+static int getrandom_works = CRYPTOGRAPHY_OSRANDOM_GETRANDOM_NOT_INIT;
+
+static int osrandom_init(ENGINE *e) {
+    /* We try to detect working getrandom until we succeed. */
+    if (getrandom_works != CRYPTOGRAPHY_OSRANDOM_GETRANDOM_WORKS) {
+        long n;
+        char dest[1];
+        /* if the kernel CSPRNG is not initialized this will block */
+        n = syscall(SYS_getrandom, dest, sizeof(dest), 0);
+        if (n == sizeof(dest)) {
+            getrandom_works = CRYPTOGRAPHY_OSRANDOM_GETRANDOM_WORKS;
+        } else {
+            int e = errno;
+            switch(e) {
+            case ENOSYS:
+                /* Fallback: Kernel does not support the syscall. */
+                getrandom_works = CRYPTOGRAPHY_OSRANDOM_GETRANDOM_FALLBACK;
+                break;
+            case EPERM:
+                /* Fallback: seccomp prevents syscall */
+                getrandom_works = CRYPTOGRAPHY_OSRANDOM_GETRANDOM_FALLBACK;
+                break;
+            default:
+                /* EINTR cannot occur for buflen < 256. */
+                ERR_Cryptography_OSRandom_error(
+                    CRYPTOGRAPHY_OSRANDOM_F_INIT,
+                    CRYPTOGRAPHY_OSRANDOM_R_GETRANDOM_INIT_FAILED_UNEXPECTED,
+                    "errno", e
+                );
+                getrandom_works = CRYPTOGRAPHY_OSRANDOM_GETRANDOM_INIT_FAILED;
+                break;
+            }
+        }
+    }
+
+    /* fallback to dev urandom */
+    if (getrandom_works == CRYPTOGRAPHY_OSRANDOM_GETRANDOM_FALLBACK) {
+        int fd = dev_urandom_fd();
+        if (fd < 0) {
+            return 0;
+        }
+    }
+    return 1;
+}
+
+static int osrandom_rand_bytes(unsigned char *buffer, int size) {
+    long n;
+
+    switch(getrandom_works) {
+    case CRYPTOGRAPHY_OSRANDOM_GETRANDOM_INIT_FAILED:
+        ERR_Cryptography_OSRandom_error(
+            CRYPTOGRAPHY_OSRANDOM_F_RAND_BYTES,
+            CRYPTOGRAPHY_OSRANDOM_R_GETRANDOM_INIT_FAILED,
+            __FILE__, __LINE__
+        );
+        return 0;
+    case CRYPTOGRAPHY_OSRANDOM_GETRANDOM_NOT_INIT:
+        ERR_Cryptography_OSRandom_error(
+            CRYPTOGRAPHY_OSRANDOM_F_RAND_BYTES,
+            CRYPTOGRAPHY_OSRANDOM_R_GETRANDOM_NOT_INIT,
+            __FILE__, __LINE__
+        );
+        return 0;
+    case CRYPTOGRAPHY_OSRANDOM_GETRANDOM_FALLBACK:
+        return dev_urandom_read(buffer, size);
+    case CRYPTOGRAPHY_OSRANDOM_GETRANDOM_WORKS:
+        while (size > 0) {
+            do {
+                n = syscall(SYS_getrandom, buffer, size, 0);
+            } while (n < 0 && errno == EINTR);
+
+            if (n <= 0) {
+                ERR_Cryptography_OSRandom_error(
+                    CRYPTOGRAPHY_OSRANDOM_F_RAND_BYTES,
+                    CRYPTOGRAPHY_OSRANDOM_R_GETRANDOM_FAILED,
+                    __FILE__, __LINE__
+                );
+                return 0;
+            }
+            buffer += n;
+            size -= (int)n;
+        }
+        return 1;
+    }
+    __builtin_unreachable();
+}
+
+static int osrandom_finish(ENGINE *e) {
+    dev_urandom_close();
+    return 1;
+}
+
+static int osrandom_rand_status(void) {
+    switch(getrandom_works) {
+    case CRYPTOGRAPHY_OSRANDOM_GETRANDOM_INIT_FAILED:
+        return 0;
+    case CRYPTOGRAPHY_OSRANDOM_GETRANDOM_NOT_INIT:
+        return 0;
+    case CRYPTOGRAPHY_OSRANDOM_GETRANDOM_FALLBACK:
+        return urandom_cache.fd >= 0;
+    case CRYPTOGRAPHY_OSRANDOM_GETRANDOM_WORKS:
+        return 1;
+    }
+    __builtin_unreachable();
+}
+
+static const char *osurandom_get_implementation(void) {
+    switch(getrandom_works) {
+    case CRYPTOGRAPHY_OSRANDOM_GETRANDOM_INIT_FAILED:
+        return "<failed>";
+    case CRYPTOGRAPHY_OSRANDOM_GETRANDOM_NOT_INIT:
+        return "<not initialized>";
+    case CRYPTOGRAPHY_OSRANDOM_GETRANDOM_FALLBACK:
+        return "/dev/urandom";
+    case CRYPTOGRAPHY_OSRANDOM_GETRANDOM_WORKS:
+        return "getrandom";
+    }
+    __builtin_unreachable();
+}
+#endif /* CRYPTOGRAPHY_OSRANDOM_ENGINE_GETRANDOM */
+
+/****************************************************************************
+ * dev_urandom engine for all remaining platforms
+ */
+
+#if CRYPTOGRAPHY_OSRANDOM_ENGINE == CRYPTOGRAPHY_OSRANDOM_ENGINE_DEV_URANDOM
+static const char *Cryptography_osrandom_engine_name = "osrandom_engine /dev/urandom";
+
+static int osrandom_init(ENGINE *e) {
+    int fd = dev_urandom_fd();
+    if (fd < 0) {
+        return 0;
+    }
+    return 1;
+}
+
+static int osrandom_rand_bytes(unsigned char *buffer, int size) {
+    return dev_urandom_read(buffer, size);
+}
+
+static int osrandom_finish(ENGINE *e) {
+    dev_urandom_close();
+    return 1;
+}
+
+static int osrandom_rand_status(void) {
+    return urandom_cache.fd >= 0;
+}
+
+static const char *osurandom_get_implementation(void) {
+    return "/dev/urandom";
+}
+#endif /* CRYPTOGRAPHY_OSRANDOM_ENGINE_DEV_URANDOM */
+
+/****************************************************************************
+ * ENGINE boiler plate
+ */
+
+/* This replicates the behavior of the OpenSSL FIPS RNG, which returns a
+   -1 in the event that there is an error when calling RAND_pseudo_bytes. */
+static int osrandom_pseudo_rand_bytes(unsigned char *buffer, int size) {
+    int res = osrandom_rand_bytes(buffer, size);
+    if (res == 0) {
+        return -1;
+    } else {
+        return res;
+    }
+}
+
+static RAND_METHOD osrandom_rand = {
+    NULL,
+    osrandom_rand_bytes,
+    NULL,
+    NULL,
+    osrandom_pseudo_rand_bytes,
+    osrandom_rand_status,
+};
+
+static const ENGINE_CMD_DEFN osrandom_cmd_defns[] = {
+    {CRYPTOGRAPHY_OSRANDOM_GET_IMPLEMENTATION,
+     "get_implementation",
+     "Get CPRNG implementation.",
+     ENGINE_CMD_FLAG_NO_INPUT},
+     {0, NULL, NULL, 0}
+};
+
+static int osrandom_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void)) {
+    const char *name;
+    size_t len;
+
+    switch (cmd) {
+    case CRYPTOGRAPHY_OSRANDOM_GET_IMPLEMENTATION:
+        /* i: buffer size, p: char* buffer */
+        name = osurandom_get_implementation();
+        len = strlen(name);
+        if ((p == NULL) && (i == 0)) {
+            /* return required buffer len */
+            return (int)len;
+        }
+        if ((p == NULL) || i < 0 || ((size_t)i <= len)) {
+            /* no buffer or buffer too small */
+            ENGINEerr(ENGINE_F_ENGINE_CTRL, ENGINE_R_INVALID_ARGUMENT);
+            return 0;
+        }
+        strcpy((char *)p, name);
+        return (int)len;
+    default:
+        ENGINEerr(ENGINE_F_ENGINE_CTRL, ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED);
+        return 0;
+    }
+}
+
+/* error reporting */
+#define ERR_FUNC(func) ERR_PACK(0, func, 0)
+#define ERR_REASON(reason) ERR_PACK(0, 0, reason)
+
+static ERR_STRING_DATA CRYPTOGRAPHY_OSRANDOM_lib_name[] = {
+    {0, "osrandom_engine"},
+    {0, NULL}
+};
+
+static ERR_STRING_DATA CRYPTOGRAPHY_OSRANDOM_str_funcs[] = {
+    {ERR_FUNC(CRYPTOGRAPHY_OSRANDOM_F_INIT),
+     "osrandom_init"},
+    {ERR_FUNC(CRYPTOGRAPHY_OSRANDOM_F_RAND_BYTES),
+     "osrandom_rand_bytes"},
+    {ERR_FUNC(CRYPTOGRAPHY_OSRANDOM_F_FINISH),
+     "osrandom_finish"},
+    {ERR_FUNC(CRYPTOGRAPHY_OSRANDOM_F_DEV_URANDOM_FD),
+     "dev_urandom_fd"},
+    {ERR_FUNC(CRYPTOGRAPHY_OSRANDOM_F_DEV_URANDOM_READ),
+     "dev_urandom_read"},
+    {0, NULL}
+};
+
+static ERR_STRING_DATA CRYPTOGRAPHY_OSRANDOM_str_reasons[] = {
+    {ERR_REASON(CRYPTOGRAPHY_OSRANDOM_R_CRYPTACQUIRECONTEXT),
+     "CryptAcquireContext() failed."},
+    {ERR_REASON(CRYPTOGRAPHY_OSRANDOM_R_CRYPTGENRANDOM),
+     "CryptGenRandom() failed."},
+    {ERR_REASON(CRYPTOGRAPHY_OSRANDOM_R_CRYPTRELEASECONTEXT),
+     "CryptReleaseContext() failed."},
+    {ERR_REASON(CRYPTOGRAPHY_OSRANDOM_R_GETENTROPY_FAILED),
+     "getentropy() failed"},
+    {ERR_REASON(CRYPTOGRAPHY_OSRANDOM_R_DEV_URANDOM_OPEN_FAILED),
+     "open('/dev/urandom') failed."},
+    {ERR_REASON(CRYPTOGRAPHY_OSRANDOM_R_DEV_URANDOM_READ_FAILED),
+     "Reading from /dev/urandom fd failed."},
+    {ERR_REASON(CRYPTOGRAPHY_OSRANDOM_R_GETRANDOM_INIT_FAILED),
+     "getrandom() initialization failed."},
+    {ERR_REASON(CRYPTOGRAPHY_OSRANDOM_R_GETRANDOM_INIT_FAILED_UNEXPECTED),
+     "getrandom() initialization failed with unexpected errno."},
+    {ERR_REASON(CRYPTOGRAPHY_OSRANDOM_R_GETRANDOM_FAILED),
+     "getrandom() syscall failed."},
+    {ERR_REASON(CRYPTOGRAPHY_OSRANDOM_R_GETRANDOM_NOT_INIT),
+     "getrandom() engine was not properly initialized."},
+    {0, NULL}
+};
+
+static int Cryptography_OSRandom_lib_error_code = 0;
+
+static void ERR_load_Cryptography_OSRandom_strings(void)
+{
+    if (Cryptography_OSRandom_lib_error_code == 0) {
+        Cryptography_OSRandom_lib_error_code = ERR_get_next_error_library();
+        ERR_load_strings(Cryptography_OSRandom_lib_error_code,
+                         CRYPTOGRAPHY_OSRANDOM_lib_name);
+        ERR_load_strings(Cryptography_OSRandom_lib_error_code,
+                         CRYPTOGRAPHY_OSRANDOM_str_funcs);
+        ERR_load_strings(Cryptography_OSRandom_lib_error_code,
+                         CRYPTOGRAPHY_OSRANDOM_str_reasons);
+    }
+}
+
+static void ERR_Cryptography_OSRandom_error(int function, int reason,
+                                            char *file, int line)
+{
+    ERR_PUT_error(Cryptography_OSRandom_lib_error_code, function, reason,
+                  file, line);
+}
+
+/* Returns 1 if successfully added, 2 if engine has previously been added,
+   and 0 for error. */
+int Cryptography_add_osrandom_engine(void) {
+    ENGINE *e;
+
+    ERR_load_Cryptography_OSRandom_strings();
+
+    e = ENGINE_by_id(Cryptography_osrandom_engine_id);
+    if (e != NULL) {
+        ENGINE_free(e);
+        return 2;
+    } else {
+        ERR_clear_error();
+    }
+
+    e = ENGINE_new();
+    if (e == NULL) {
+        return 0;
+    }
+    if (!ENGINE_set_id(e, Cryptography_osrandom_engine_id) ||
+            !ENGINE_set_name(e, Cryptography_osrandom_engine_name) ||
+            !ENGINE_set_RAND(e, &osrandom_rand) ||
+            !ENGINE_set_init_function(e, osrandom_init) ||
+            !ENGINE_set_finish_function(e, osrandom_finish) ||
+            !ENGINE_set_cmd_defns(e, osrandom_cmd_defns) ||
+            !ENGINE_set_ctrl_function(e, osrandom_ctrl)) {
+        ENGINE_free(e);
+        return 0;
+    }
+    if (!ENGINE_add(e)) {
+        ENGINE_free(e);
+        return 0;
+    }
+    if (!ENGINE_free(e)) {
+        return 0;
+    }
+
+    return 1;
+}
+
+#else
+/* If OpenSSL has no ENGINE support then we don't want
+ * to compile the osrandom engine, but we do need some
+ * placeholders */
+static const char *Cryptography_osrandom_engine_id = "no-engine-support";
+static const char *Cryptography_osrandom_engine_name = "osrandom_engine disabled";
+
+int Cryptography_add_osrandom_engine(void) {
+    return 0;
+}
+
+#endif
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/src/osrandom_engine.h b/contrib/python/cryptography/py2/_cffi_src/openssl/src/osrandom_engine.h
new file mode 100644
index 0000000000..93d918b88b
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/src/osrandom_engine.h
@@ -0,0 +1,118 @@
+#ifndef OPENSSL_NO_ENGINE
+/* OpenSSL has ENGINE support so include all of this. */
+#ifdef _WIN32
+  #include <Wincrypt.h>
+#else
+  #include <fcntl.h>
+  #include <unistd.h>
+   /* for defined(BSD) */
+  #ifndef __MVS__
+    #include <sys/param.h>
+  #endif
+
+  #ifdef BSD
+    /* for SYS_getentropy */
+    #include <sys/syscall.h>
+  #endif
+
+  #ifdef __APPLE__
+    #include <sys/random.h>
+    /* To support weak linking we need to declare this as a weak import even if
+     * it's not present in sys/random (e.g. macOS < 10.12). */
+    extern int getentropy(void *buffer, size_t size) __attribute((weak_import));
+  #endif
+
+  #ifdef __linux__
+    /* for SYS_getrandom */
+    #include <sys/syscall.h>
+    #ifndef GRND_NONBLOCK
+      #define GRND_NONBLOCK 0x0001
+    #endif /* GRND_NONBLOCK */
+
+    #ifndef SYS_getrandom
+      /* We only bother to define the constants for platforms where we ship
+       * wheels, since that's the predominant way you get a situation where
+       * you don't have SYS_getrandom at compile time but do have the syscall
+       * at runtime */
+      #if defined(__x86_64__)
+        #define SYS_getrandom 318
+      #elif defined(__i386__)
+        #define SYS_getrandom 355
+      #elif defined(__aarch64__)
+        #define SYS_getrandom 278
+      #endif
+    #endif
+  #endif /* __linux__ */
+#endif /* _WIN32 */
+
+#define CRYPTOGRAPHY_OSRANDOM_ENGINE_CRYPTGENRANDOM 1
+#define CRYPTOGRAPHY_OSRANDOM_ENGINE_GETENTROPY 2
+#define CRYPTOGRAPHY_OSRANDOM_ENGINE_GETRANDOM 3
+#define CRYPTOGRAPHY_OSRANDOM_ENGINE_DEV_URANDOM 4
+
+#ifndef CRYPTOGRAPHY_OSRANDOM_ENGINE
+  #if defined(_WIN32)
+    /* Windows */
+    #define CRYPTOGRAPHY_OSRANDOM_ENGINE CRYPTOGRAPHY_OSRANDOM_ENGINE_CRYPTGENRANDOM
+  #elif defined(BSD) && defined(SYS_getentropy)
+    /* OpenBSD 5.6+ & macOS with SYS_getentropy defined, although < 10.12 will fallback
+     * to urandom */
+    #define CRYPTOGRAPHY_OSRANDOM_ENGINE CRYPTOGRAPHY_OSRANDOM_ENGINE_GETENTROPY
+  #elif defined(__linux__) && defined(SYS_getrandom)
+    /* Linux 3.17+ */
+    #define CRYPTOGRAPHY_OSRANDOM_ENGINE CRYPTOGRAPHY_OSRANDOM_ENGINE_GETRANDOM
+  #else
+    /* Keep this as last entry, fall back to /dev/urandom */
+    #define CRYPTOGRAPHY_OSRANDOM_ENGINE CRYPTOGRAPHY_OSRANDOM_ENGINE_DEV_URANDOM
+  #endif
+#endif /* CRYPTOGRAPHY_OSRANDOM_ENGINE */
+
+/* Fallbacks need /dev/urandom helper functions. */
+#if CRYPTOGRAPHY_OSRANDOM_ENGINE == CRYPTOGRAPHY_OSRANDOM_ENGINE_GETRANDOM || \
+     CRYPTOGRAPHY_OSRANDOM_ENGINE == CRYPTOGRAPHY_OSRANDOM_ENGINE_DEV_URANDOM || \
+     (CRYPTOGRAPHY_OSRANDOM_ENGINE == CRYPTOGRAPHY_OSRANDOM_ENGINE_GETENTROPY && \
+     defined(__APPLE__))
+  #define CRYPTOGRAPHY_OSRANDOM_NEEDS_DEV_URANDOM 1
+#endif
+
+enum {
+    CRYPTOGRAPHY_OSRANDOM_GETRANDOM_INIT_FAILED = -2,
+    CRYPTOGRAPHY_OSRANDOM_GETRANDOM_NOT_INIT,
+    CRYPTOGRAPHY_OSRANDOM_GETRANDOM_FALLBACK,
+    CRYPTOGRAPHY_OSRANDOM_GETRANDOM_WORKS
+};
+
+enum {
+    CRYPTOGRAPHY_OSRANDOM_GETENTROPY_NOT_INIT,
+    CRYPTOGRAPHY_OSRANDOM_GETENTROPY_FALLBACK,
+    CRYPTOGRAPHY_OSRANDOM_GETENTROPY_WORKS
+};
+
+/* engine ctrl */
+#define CRYPTOGRAPHY_OSRANDOM_GET_IMPLEMENTATION ENGINE_CMD_BASE
+
+/* error reporting */
+static void ERR_load_Cryptography_OSRandom_strings(void);
+static void ERR_Cryptography_OSRandom_error(int function, int reason,
+                                            char *file, int line);
+
+#define CRYPTOGRAPHY_OSRANDOM_F_INIT 100
+#define CRYPTOGRAPHY_OSRANDOM_F_RAND_BYTES 101
+#define CRYPTOGRAPHY_OSRANDOM_F_FINISH 102
+#define CRYPTOGRAPHY_OSRANDOM_F_DEV_URANDOM_FD 300
+#define CRYPTOGRAPHY_OSRANDOM_F_DEV_URANDOM_READ 301
+
+#define CRYPTOGRAPHY_OSRANDOM_R_CRYPTACQUIRECONTEXT 100
+#define CRYPTOGRAPHY_OSRANDOM_R_CRYPTGENRANDOM 101
+#define CRYPTOGRAPHY_OSRANDOM_R_CRYPTRELEASECONTEXT 102
+
+#define CRYPTOGRAPHY_OSRANDOM_R_GETENTROPY_FAILED 200
+
+#define CRYPTOGRAPHY_OSRANDOM_R_DEV_URANDOM_OPEN_FAILED 300
+#define CRYPTOGRAPHY_OSRANDOM_R_DEV_URANDOM_READ_FAILED 301
+
+#define CRYPTOGRAPHY_OSRANDOM_R_GETRANDOM_INIT_FAILED 400
+#define CRYPTOGRAPHY_OSRANDOM_R_GETRANDOM_INIT_FAILED_UNEXPECTED 402
+#define CRYPTOGRAPHY_OSRANDOM_R_GETRANDOM_FAILED 403
+#define CRYPTOGRAPHY_OSRANDOM_R_GETRANDOM_NOT_INIT 404
+#endif
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/ssl.py b/contrib/python/cryptography/py2/_cffi_src/openssl/ssl.py
new file mode 100644
index 0000000000..9400f115fb
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/ssl.py
@@ -0,0 +1,705 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/ssl.h>
+
+typedef STACK_OF(SSL_CIPHER) Cryptography_STACK_OF_SSL_CIPHER;
+"""
+
+TYPES = """
+static const long Cryptography_HAS_SSL_ST;
+static const long Cryptography_HAS_TLS_ST;
+static const long Cryptography_HAS_SSL3_METHOD;
+static const long Cryptography_HAS_TLSv1_1;
+static const long Cryptography_HAS_TLSv1_2;
+static const long Cryptography_HAS_TLSv1_3;
+static const long Cryptography_HAS_SECURE_RENEGOTIATION;
+static const long Cryptography_HAS_SSL_CTX_CLEAR_OPTIONS;
+static const long Cryptography_HAS_DTLS;
+static const long Cryptography_HAS_SIGALGS;
+static const long Cryptography_HAS_PSK;
+static const long Cryptography_HAS_VERIFIED_CHAIN;
+static const long Cryptography_HAS_KEYLOG;
+static const long Cryptography_HAS_GET_PROTO_VERSION;
+static const long Cryptography_HAS_TLSEXT_HOSTNAME;
+
+/* Internally invented symbol to tell us if SSL_MODE_RELEASE_BUFFERS is
+ * supported
+ */
+static const long Cryptography_HAS_RELEASE_BUFFERS;
+
+/* Internally invented symbol to tell us if SSL_OP_NO_COMPRESSION is
+ * supported
+ */
+static const long Cryptography_HAS_OP_NO_COMPRESSION;
+static const long Cryptography_HAS_SSL_OP_MSIE_SSLV2_RSA_PADDING;
+static const long Cryptography_HAS_SSL_SET_SSL_CTX;
+static const long Cryptography_HAS_SSL_OP_NO_TICKET;
+static const long Cryptography_HAS_ALPN;
+static const long Cryptography_HAS_NEXTPROTONEG;
+static const long Cryptography_HAS_SET_CERT_CB;
+static const long Cryptography_HAS_CUSTOM_EXT;
+static const long Cryptography_HAS_SRTP;
+
+static const long SSL_FILETYPE_PEM;
+static const long SSL_FILETYPE_ASN1;
+static const long SSL_ERROR_NONE;
+static const long SSL_ERROR_ZERO_RETURN;
+static const long SSL_ERROR_WANT_READ;
+static const long SSL_ERROR_WANT_WRITE;
+static const long SSL_ERROR_WANT_X509_LOOKUP;
+static const long SSL_ERROR_WANT_CONNECT;
+static const long SSL_ERROR_SYSCALL;
+static const long SSL_ERROR_SSL;
+static const long SSL_SENT_SHUTDOWN;
+static const long SSL_RECEIVED_SHUTDOWN;
+static const long SSL_OP_NO_SSLv2;
+static const long SSL_OP_NO_SSLv3;
+static const long SSL_OP_NO_TLSv1;
+static const long SSL_OP_NO_TLSv1_1;
+static const long SSL_OP_NO_TLSv1_2;
+static const long SSL_OP_NO_TLSv1_3;
+static const long SSL_OP_NO_DTLSv1;
+static const long SSL_OP_NO_DTLSv1_2;
+static const long SSL_OP_NO_COMPRESSION;
+static const long SSL_OP_SINGLE_DH_USE;
+static const long SSL_OP_EPHEMERAL_RSA;
+static const long SSL_OP_MICROSOFT_SESS_ID_BUG;
+static const long SSL_OP_NETSCAPE_CHALLENGE_BUG;
+static const long SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG;
+static const long SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG;
+static const long SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER;
+static const long SSL_OP_MSIE_SSLV2_RSA_PADDING;
+static const long SSL_OP_SSLEAY_080_CLIENT_DH_BUG;
+static const long SSL_OP_TLS_D5_BUG;
+static const long SSL_OP_TLS_BLOCK_PADDING_BUG;
+static const long SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS;
+static const long SSL_OP_CIPHER_SERVER_PREFERENCE;
+static const long SSL_OP_TLS_ROLLBACK_BUG;
+static const long SSL_OP_PKCS1_CHECK_1;
+static const long SSL_OP_PKCS1_CHECK_2;
+static const long SSL_OP_NETSCAPE_CA_DN_BUG;
+static const long SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG;
+static const long SSL_OP_NO_QUERY_MTU;
+static const long SSL_OP_COOKIE_EXCHANGE;
+static const long SSL_OP_NO_TICKET;
+static const long SSL_OP_ALL;
+static const long SSL_OP_SINGLE_ECDH_USE;
+static const long SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION;
+static const long SSL_OP_LEGACY_SERVER_CONNECT;
+static const long SSL_VERIFY_PEER;
+static const long SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
+static const long SSL_VERIFY_CLIENT_ONCE;
+static const long SSL_VERIFY_NONE;
+static const long SSL_VERIFY_POST_HANDSHAKE;
+static const long SSL_SESS_CACHE_OFF;
+static const long SSL_SESS_CACHE_CLIENT;
+static const long SSL_SESS_CACHE_SERVER;
+static const long SSL_SESS_CACHE_BOTH;
+static const long SSL_SESS_CACHE_NO_AUTO_CLEAR;
+static const long SSL_SESS_CACHE_NO_INTERNAL_LOOKUP;
+static const long SSL_SESS_CACHE_NO_INTERNAL_STORE;
+static const long SSL_SESS_CACHE_NO_INTERNAL;
+static const long SSL_ST_CONNECT;
+static const long SSL_ST_ACCEPT;
+static const long SSL_ST_MASK;
+static const long SSL_ST_INIT;
+static const long SSL_ST_BEFORE;
+static const long SSL_ST_OK;
+static const long SSL_ST_RENEGOTIATE;
+static const long SSL_CB_LOOP;
+static const long SSL_CB_EXIT;
+static const long SSL_CB_READ;
+static const long SSL_CB_WRITE;
+static const long SSL_CB_ALERT;
+static const long SSL_CB_READ_ALERT;
+static const long SSL_CB_WRITE_ALERT;
+static const long SSL_CB_ACCEPT_LOOP;
+static const long SSL_CB_ACCEPT_EXIT;
+static const long SSL_CB_CONNECT_LOOP;
+static const long SSL_CB_CONNECT_EXIT;
+static const long SSL_CB_HANDSHAKE_START;
+static const long SSL_CB_HANDSHAKE_DONE;
+static const long SSL_MODE_RELEASE_BUFFERS;
+static const long SSL_MODE_ENABLE_PARTIAL_WRITE;
+static const long SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER;
+static const long SSL_MODE_AUTO_RETRY;
+static const long SSL3_RANDOM_SIZE;
+static const long TLS_ST_BEFORE;
+static const long TLS_ST_OK;
+
+typedef ... SSL_METHOD;
+typedef ... SSL_CTX;
+
+typedef ... SSL_SESSION;
+
+typedef ... SSL;
+
+static const long TLSEXT_NAMETYPE_host_name;
+static const long TLSEXT_STATUSTYPE_ocsp;
+
+typedef ... SSL_CIPHER;
+typedef ... Cryptography_STACK_OF_SSL_CIPHER;
+
+typedef struct {
+    const char *name;
+    unsigned long id;
+} SRTP_PROTECTION_PROFILE;
+"""
+
+FUNCTIONS = """
+/*  SSL */
+const char *SSL_state_string_long(const SSL *);
+SSL_SESSION *SSL_get1_session(SSL *);
+int SSL_set_session(SSL *, SSL_SESSION *);
+SSL *SSL_new(SSL_CTX *);
+void SSL_free(SSL *);
+int SSL_set_fd(SSL *, int);
+SSL_CTX *SSL_set_SSL_CTX(SSL *, SSL_CTX *);
+void SSL_set_bio(SSL *, BIO *, BIO *);
+void SSL_set_connect_state(SSL *);
+void SSL_set_accept_state(SSL *);
+void SSL_set_shutdown(SSL *, int);
+int SSL_get_shutdown(const SSL *);
+int SSL_pending(const SSL *);
+int SSL_write(SSL *, const void *, int);
+int SSL_read(SSL *, void *, int);
+int SSL_peek(SSL *, void *, int);
+X509 *SSL_get_certificate(const SSL *);
+X509 *SSL_get_peer_certificate(const SSL *);
+int SSL_get_ex_data_X509_STORE_CTX_idx(void);
+
+/* Added in 1.0.2 */
+X509_VERIFY_PARAM *SSL_get0_param(SSL *);
+X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *);
+
+int SSL_get_sigalgs(SSL *, int, int *, int *, int *, unsigned char *,
+                    unsigned char *);
+
+Cryptography_STACK_OF_X509 *SSL_get_peer_cert_chain(const SSL *);
+Cryptography_STACK_OF_X509 *SSL_get0_verified_chain(const SSL *);
+Cryptography_STACK_OF_X509_NAME *SSL_get_client_CA_list(const SSL *);
+
+int SSL_get_error(const SSL *, int);
+long SSL_get_verify_result(const SSL *ssl);
+int SSL_do_handshake(SSL *);
+int SSL_shutdown(SSL *);
+int SSL_renegotiate(SSL *);
+int SSL_renegotiate_pending(SSL *);
+const char *SSL_get_cipher_list(const SSL *, int);
+
+/*  context */
+void SSL_CTX_free(SSL_CTX *);
+long SSL_CTX_set_timeout(SSL_CTX *, long);
+int SSL_CTX_set_default_verify_paths(SSL_CTX *);
+void SSL_CTX_set_verify(SSL_CTX *, int, int (*)(int, X509_STORE_CTX *));
+void SSL_CTX_set_verify_depth(SSL_CTX *, int);
+int SSL_CTX_get_verify_mode(const SSL_CTX *);
+int SSL_CTX_get_verify_depth(const SSL_CTX *);
+int SSL_CTX_set_cipher_list(SSL_CTX *, const char *);
+int SSL_CTX_load_verify_locations(SSL_CTX *, const char *, const char *);
+void SSL_CTX_set_default_passwd_cb(SSL_CTX *, pem_password_cb *);
+void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *, void *);
+int SSL_CTX_use_certificate(SSL_CTX *, X509 *);
+int SSL_CTX_use_certificate_file(SSL_CTX *, const char *, int);
+int SSL_CTX_use_certificate_chain_file(SSL_CTX *, const char *);
+int SSL_CTX_use_PrivateKey(SSL_CTX *, EVP_PKEY *);
+int SSL_CTX_use_PrivateKey_file(SSL_CTX *, const char *, int);
+int SSL_CTX_check_private_key(const SSL_CTX *);
+void SSL_CTX_set_cert_verify_callback(SSL_CTX *,
+                                      int (*)(X509_STORE_CTX *, void *),
+                                      void *);
+
+void SSL_CTX_set_cookie_generate_cb(SSL_CTX *,
+                                    int (*)(
+                                        SSL *,
+                                        unsigned char *,
+                                        unsigned int *
+                                    ));
+long SSL_CTX_get_read_ahead(SSL_CTX *);
+long SSL_CTX_set_read_ahead(SSL_CTX *, long);
+
+int SSL_CTX_use_psk_identity_hint(SSL_CTX *, const char *);
+void SSL_CTX_set_psk_server_callback(SSL_CTX *,
+                                     unsigned int (*)(
+                                         SSL *,
+                                         const char *,
+                                         unsigned char *,
+                                         unsigned int
+                                     ));
+void SSL_CTX_set_psk_client_callback(SSL_CTX *,
+                                     unsigned int (*)(
+                                         SSL *,
+                                         const char *,
+                                         char *,
+                                         unsigned int,
+                                         unsigned char *,
+                                         unsigned int
+                                     ));
+
+int SSL_CTX_set_session_id_context(SSL_CTX *, const unsigned char *,
+                                   unsigned int);
+
+void SSL_CTX_set_cert_store(SSL_CTX *, X509_STORE *);
+X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *);
+int SSL_CTX_add_client_CA(SSL_CTX *, X509 *);
+
+void SSL_CTX_set_client_CA_list(SSL_CTX *, Cryptography_STACK_OF_X509_NAME *);
+
+void SSL_CTX_set_info_callback(SSL_CTX *, void (*)(const SSL *, int, int));
+void (*SSL_CTX_get_info_callback(SSL_CTX *))(const SSL *, int, int);
+
+void SSL_CTX_set_keylog_callback(SSL_CTX *,
+                                 void (*)(const SSL *, const char *));
+void (*SSL_CTX_get_keylog_callback(SSL_CTX *))(const SSL *, const char *);
+
+long SSL_CTX_set1_sigalgs_list(SSL_CTX *, const char *);
+
+/*  SSL_SESSION */
+void SSL_SESSION_free(SSL_SESSION *);
+
+/* Information about actually used cipher */
+const char *SSL_CIPHER_get_name(const SSL_CIPHER *);
+int SSL_CIPHER_get_bits(const SSL_CIPHER *, int *);
+/* the modern signature of this is uint32_t, but older openssl declared it
+   as unsigned long. To make our compiler flags happy we'll declare it as a
+   64-bit wide value, which should always be safe */
+uint64_t SSL_CIPHER_get_id(const SSL_CIPHER *);
+int SSL_CIPHER_is_aead(const SSL_CIPHER *);
+int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *);
+int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *);
+int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *);
+int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *);
+
+size_t SSL_get_finished(const SSL *, void *, size_t);
+size_t SSL_get_peer_finished(const SSL *, void *, size_t);
+Cryptography_STACK_OF_X509_NAME *SSL_load_client_CA_file(const char *);
+
+const char *SSL_get_servername(const SSL *, const int);
+/* Function signature changed to const char * in 1.1.0 */
+const char *SSL_CIPHER_get_version(const SSL_CIPHER *);
+/* These became macros in 1.1.0 */
+int SSL_library_init(void);
+void SSL_load_error_strings(void);
+
+/* these CRYPTO_EX_DATA functions became macros in 1.1.0 */
+int SSL_get_ex_new_index(long, void *, CRYPTO_EX_new *, CRYPTO_EX_dup *,
+                         CRYPTO_EX_free *);
+int SSL_set_ex_data(SSL *, int, void *);
+int SSL_CTX_get_ex_new_index(long, void *, CRYPTO_EX_new *, CRYPTO_EX_dup *,
+                             CRYPTO_EX_free *);
+int SSL_CTX_set_ex_data(SSL_CTX *, int, void *);
+
+SSL_SESSION *SSL_get_session(const SSL *);
+const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *, unsigned int *);
+long SSL_SESSION_get_time(const SSL_SESSION *);
+long SSL_SESSION_get_timeout(const SSL_SESSION *);
+int SSL_SESSION_has_ticket(const SSL_SESSION *);
+long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *);
+
+unsigned long SSL_set_mode(SSL *, unsigned long);
+unsigned long SSL_clear_mode(SSL *, unsigned long);
+unsigned long SSL_get_mode(SSL *);
+
+unsigned long SSL_set_options(SSL *, unsigned long);
+unsigned long SSL_get_options(SSL *);
+
+int SSL_want_read(const SSL *);
+int SSL_want_write(const SSL *);
+
+long SSL_total_renegotiations(SSL *);
+long SSL_get_secure_renegotiation_support(SSL *);
+
+long SSL_CTX_set_min_proto_version(SSL_CTX *, int);
+long SSL_CTX_set_max_proto_version(SSL_CTX *, int);
+long SSL_set_min_proto_version(SSL *, int);
+long SSL_set_max_proto_version(SSL *, int);
+
+long SSL_CTX_get_min_proto_version(SSL_CTX *);
+long SSL_CTX_get_max_proto_version(SSL_CTX *);
+long SSL_get_min_proto_version(SSL *);
+long SSL_get_max_proto_version(SSL *);
+
+/* Defined as unsigned long because SSL_OP_ALL is greater than signed 32-bit
+   and Windows defines long as 32-bit. */
+unsigned long SSL_CTX_set_options(SSL_CTX *, unsigned long);
+unsigned long SSL_CTX_clear_options(SSL_CTX *, unsigned long);
+unsigned long SSL_CTX_get_options(SSL_CTX *);
+unsigned long SSL_CTX_set_mode(SSL_CTX *, unsigned long);
+unsigned long SSL_CTX_clear_mode(SSL_CTX *, unsigned long);
+unsigned long SSL_CTX_get_mode(SSL_CTX *);
+unsigned long SSL_CTX_set_session_cache_mode(SSL_CTX *, unsigned long);
+unsigned long SSL_CTX_get_session_cache_mode(SSL_CTX *);
+unsigned long SSL_CTX_set_tmp_dh(SSL_CTX *, DH *);
+unsigned long SSL_CTX_set_tmp_ecdh(SSL_CTX *, EC_KEY *);
+unsigned long SSL_CTX_add_extra_chain_cert(SSL_CTX *, X509 *);
+
+/*- These aren't macros these functions are all const X on openssl > 1.0.x -*/
+
+/*  methods */
+
+const SSL_METHOD *TLSv1_1_method(void);
+const SSL_METHOD *TLSv1_1_server_method(void);
+const SSL_METHOD *TLSv1_1_client_method(void);
+
+const SSL_METHOD *TLSv1_2_method(void);
+const SSL_METHOD *TLSv1_2_server_method(void);
+const SSL_METHOD *TLSv1_2_client_method(void);
+
+const SSL_METHOD *SSLv3_method(void);
+const SSL_METHOD *SSLv3_server_method(void);
+const SSL_METHOD *SSLv3_client_method(void);
+
+const SSL_METHOD *TLSv1_method(void);
+const SSL_METHOD *TLSv1_server_method(void);
+const SSL_METHOD *TLSv1_client_method(void);
+
+const SSL_METHOD *DTLSv1_method(void);
+const SSL_METHOD *DTLSv1_server_method(void);
+const SSL_METHOD *DTLSv1_client_method(void);
+
+/* Added in 1.0.2 */
+const SSL_METHOD *DTLS_method(void);
+const SSL_METHOD *DTLS_server_method(void);
+const SSL_METHOD *DTLS_client_method(void);
+
+const SSL_METHOD *SSLv23_method(void);
+const SSL_METHOD *SSLv23_server_method(void);
+const SSL_METHOD *SSLv23_client_method(void);
+
+const SSL_METHOD *TLS_method(void);
+const SSL_METHOD *TLS_server_method(void);
+const SSL_METHOD *TLS_client_method(void);
+
+/*- These aren't macros these arguments are all const X on openssl > 1.0.x -*/
+SSL_CTX *SSL_CTX_new(SSL_METHOD *);
+long SSL_CTX_get_timeout(const SSL_CTX *);
+
+const SSL_CIPHER *SSL_get_current_cipher(const SSL *);
+const char *SSL_get_version(const SSL *);
+int SSL_version(const SSL *);
+
+void *SSL_CTX_get_ex_data(const SSL_CTX *, int);
+void *SSL_get_ex_data(const SSL *, int);
+
+void SSL_set_tlsext_host_name(SSL *, char *);
+void SSL_CTX_set_tlsext_servername_callback(
+    SSL_CTX *,
+    int (*)(SSL *, int *, void *));
+void SSL_CTX_set_tlsext_servername_arg(
+    SSL_CTX *, void *);
+
+long SSL_set_tlsext_status_ocsp_resp(SSL *, unsigned char *, int);
+long SSL_get_tlsext_status_ocsp_resp(SSL *, const unsigned char **);
+long SSL_set_tlsext_status_type(SSL *, long);
+long SSL_CTX_set_tlsext_status_cb(SSL_CTX *, int(*)(SSL *, void *));
+long SSL_CTX_set_tlsext_status_arg(SSL_CTX *, void *);
+
+int SSL_CTX_set_tlsext_use_srtp(SSL_CTX *, const char *);
+int SSL_set_tlsext_use_srtp(SSL *, const char *);
+SRTP_PROTECTION_PROFILE *SSL_get_selected_srtp_profile(SSL *);
+
+long SSL_session_reused(SSL *);
+
+int SSL_select_next_proto(unsigned char **, unsigned char *,
+                          const unsigned char *, unsigned int,
+                          const unsigned char *, unsigned int);
+
+int sk_SSL_CIPHER_num(Cryptography_STACK_OF_SSL_CIPHER *);
+const SSL_CIPHER *sk_SSL_CIPHER_value(Cryptography_STACK_OF_SSL_CIPHER *, int);
+
+/* ALPN APIs were introduced in OpenSSL 1.0.2.  To continue to support earlier
+ * versions some special handling of these is necessary.
+ */
+int SSL_CTX_set_alpn_protos(SSL_CTX *, const unsigned char *, unsigned);
+int SSL_set_alpn_protos(SSL *, const unsigned char *, unsigned);
+void SSL_CTX_set_alpn_select_cb(SSL_CTX *,
+                                int (*) (SSL *,
+                                         const unsigned char **,
+                                         unsigned char *,
+                                         const unsigned char *,
+                                         unsigned int,
+                                         void *),
+                                void *);
+void SSL_get0_alpn_selected(const SSL *, const unsigned char **, unsigned *);
+
+long SSL_get_server_tmp_key(SSL *, EVP_PKEY **);
+
+/* SSL_CTX_set_cert_cb is introduced in OpenSSL 1.0.2. To continue to support
+ * earlier versions some special handling of these is necessary.
+ */
+void SSL_CTX_set_cert_cb(SSL_CTX *, int (*)(SSL *, void *), void *);
+void SSL_set_cert_cb(SSL *, int (*)(SSL *, void *), void *);
+
+int SSL_SESSION_set1_id_context(SSL_SESSION *, const unsigned char *,
+                                unsigned int);
+/* Added in 1.1.0 for the great opaquing of structs */
+size_t SSL_SESSION_get_master_key(const SSL_SESSION *, unsigned char *,
+                                  size_t);
+size_t SSL_get_client_random(const SSL *, unsigned char *, size_t);
+size_t SSL_get_server_random(const SSL *, unsigned char *, size_t);
+int SSL_export_keying_material(SSL *, unsigned char *, size_t, const char *,
+                               size_t, const unsigned char *, size_t, int);
+
+long SSL_CTX_sess_number(SSL_CTX *);
+long SSL_CTX_sess_connect(SSL_CTX *);
+long SSL_CTX_sess_connect_good(SSL_CTX *);
+long SSL_CTX_sess_connect_renegotiate(SSL_CTX *);
+long SSL_CTX_sess_accept(SSL_CTX *);
+long SSL_CTX_sess_accept_good(SSL_CTX *);
+long SSL_CTX_sess_accept_renegotiate(SSL_CTX *);
+long SSL_CTX_sess_hits(SSL_CTX *);
+long SSL_CTX_sess_cb_hits(SSL_CTX *);
+long SSL_CTX_sess_misses(SSL_CTX *);
+long SSL_CTX_sess_timeouts(SSL_CTX *);
+long SSL_CTX_sess_cache_full(SSL_CTX *);
+
+/* DTLS support */
+long Cryptography_DTLSv1_get_timeout(SSL *, time_t *, long *);
+long DTLSv1_handle_timeout(SSL *);
+long DTLS_set_link_mtu(SSL *, long);
+long DTLS_get_link_min_mtu(SSL *);
+
+/* Custom extensions. */
+typedef int (*custom_ext_add_cb)(SSL *, unsigned int,
+                                 const unsigned char **,
+                                 size_t *, int *,
+                                 void *);
+
+typedef void (*custom_ext_free_cb)(SSL *, unsigned int,
+                                   const unsigned char *,
+                                   void *);
+
+typedef int (*custom_ext_parse_cb)(SSL *, unsigned int,
+                                   const unsigned char *,
+                                   size_t, int *,
+                                   void *);
+
+int SSL_CTX_add_client_custom_ext(SSL_CTX *, unsigned int,
+                                  custom_ext_add_cb,
+                                  custom_ext_free_cb, void *,
+                                  custom_ext_parse_cb,
+                                  void *);
+
+int SSL_CTX_add_server_custom_ext(SSL_CTX *, unsigned int,
+                                  custom_ext_add_cb,
+                                  custom_ext_free_cb, void *,
+                                  custom_ext_parse_cb,
+                                  void *);
+
+int SSL_extension_supported(unsigned int);
+
+int SSL_CTX_set_ciphersuites(SSL_CTX *, const char *);
+int SSL_verify_client_post_handshake(SSL *);
+void SSL_CTX_set_post_handshake_auth(SSL_CTX *, int);
+void SSL_set_post_handshake_auth(SSL *, int);
+
+uint32_t SSL_SESSION_get_max_early_data(const SSL_SESSION *);
+int SSL_write_early_data(SSL *, const void *, size_t, size_t *);
+int SSL_read_early_data(SSL *, void *, size_t, size_t *);
+int SSL_CTX_set_max_early_data(SSL_CTX *, uint32_t);
+"""
+
+CUSTOMIZATIONS = """
+// This symbol is being preserved because removing it will break users with
+// pyOpenSSL < 19.1 and pip < 20.x. We need to leave this in place until those
+// users have upgraded. PersistentlyDeprecated2020
+static const long Cryptography_HAS_TLSEXT_HOSTNAME = 1;
+
+#if CRYPTOGRAPHY_IS_LIBRESSL
+static const long Cryptography_HAS_VERIFIED_CHAIN = 0;
+Cryptography_STACK_OF_X509 *(*SSL_get0_verified_chain)(const SSL *) = NULL;
+#else
+static const long Cryptography_HAS_VERIFIED_CHAIN = 1;
+#endif
+
+#if CRYPTOGRAPHY_OPENSSL_LESS_THAN_111
+static const long Cryptography_HAS_KEYLOG = 0;
+void (*SSL_CTX_set_keylog_callback)(SSL_CTX *,
+                                    void (*) (const SSL *, const char *)
+                                    ) = NULL;
+void (*(*SSL_CTX_get_keylog_callback)(SSL_CTX *))(
+                                                  const SSL *,
+                                                  const char *
+                                                  ) = NULL;
+#else
+static const long Cryptography_HAS_KEYLOG = 1;
+#endif
+
+static const long Cryptography_HAS_SECURE_RENEGOTIATION = 1;
+
+#ifdef OPENSSL_NO_SSL3_METHOD
+static const long Cryptography_HAS_SSL3_METHOD = 0;
+SSL_METHOD* (*SSLv3_method)(void) = NULL;
+SSL_METHOD* (*SSLv3_client_method)(void) = NULL;
+SSL_METHOD* (*SSLv3_server_method)(void) = NULL;
+#else
+static const long Cryptography_HAS_SSL3_METHOD = 1;
+#endif
+
+static const long Cryptography_HAS_RELEASE_BUFFERS = 1;
+static const long Cryptography_HAS_OP_NO_COMPRESSION = 1;
+static const long Cryptography_HAS_TLSv1_1 = 1;
+static const long Cryptography_HAS_TLSv1_2 = 1;
+static const long Cryptography_HAS_SSL_OP_MSIE_SSLV2_RSA_PADDING = 1;
+static const long Cryptography_HAS_SSL_OP_NO_TICKET = 1;
+static const long Cryptography_HAS_SSL_SET_SSL_CTX = 1;
+static const long Cryptography_HAS_NEXTPROTONEG = 0;
+static const long Cryptography_HAS_ALPN = 1;
+
+#if CRYPTOGRAPHY_IS_LIBRESSL
+void (*SSL_CTX_set_cert_cb)(SSL_CTX *, int (*)(SSL *, void *), void *) = NULL;
+void (*SSL_set_cert_cb)(SSL *, int (*)(SSL *, void *), void *) = NULL;
+static const long Cryptography_HAS_SET_CERT_CB = 0;
+#else
+static const long Cryptography_HAS_SET_CERT_CB = 1;
+#endif
+
+static const long Cryptography_HAS_SSL_CTX_CLEAR_OPTIONS = 1;
+
+/* in OpenSSL 1.1.0 the SSL_ST values were renamed to TLS_ST and several were
+   removed */
+#if CRYPTOGRAPHY_IS_LIBRESSL
+static const long Cryptography_HAS_SSL_ST = 1;
+#else
+static const long Cryptography_HAS_SSL_ST = 0;
+static const long SSL_ST_BEFORE = 0;
+static const long SSL_ST_OK = 0;
+static const long SSL_ST_INIT = 0;
+static const long SSL_ST_RENEGOTIATE = 0;
+#endif
+#if !CRYPTOGRAPHY_IS_LIBRESSL
+static const long Cryptography_HAS_TLS_ST = 1;
+#else
+static const long Cryptography_HAS_TLS_ST = 0;
+static const long TLS_ST_BEFORE = 0;
+static const long TLS_ST_OK = 0;
+#endif
+
+#if CRYPTOGRAPHY_IS_LIBRESSL
+static const long SSL_OP_NO_DTLSv1 = 0;
+static const long SSL_OP_NO_DTLSv1_2 = 0;
+long (*DTLS_set_link_mtu)(SSL *, long) = NULL;
+long (*DTLS_get_link_min_mtu)(SSL *) = NULL;
+#endif
+
+static const long Cryptography_HAS_DTLS = 1;
+/* Wrap DTLSv1_get_timeout to avoid cffi to handle a 'struct timeval'. */
+long Cryptography_DTLSv1_get_timeout(SSL *ssl, time_t *ptv_sec,
+                                     long *ptv_usec) {
+    struct timeval tv = { 0 };
+    long r = DTLSv1_get_timeout(ssl, &tv);
+
+    if (r == 1) {
+        if (ptv_sec) {
+            *ptv_sec = tv.tv_sec;
+        }
+
+        if (ptv_usec) {
+            *ptv_usec = tv.tv_usec;
+        }
+    }
+
+    return r;
+}
+
+#if CRYPTOGRAPHY_IS_LIBRESSL
+static const long Cryptography_HAS_SIGALGS = 0;
+const int (*SSL_get_sigalgs)(SSL *, int, int *, int *, int *, unsigned char *,
+                             unsigned char *) = NULL;
+const long (*SSL_CTX_set1_sigalgs_list)(SSL_CTX *, const char *) = NULL;
+#else
+static const long Cryptography_HAS_SIGALGS = 1;
+#endif
+
+#if CRYPTOGRAPHY_IS_LIBRESSL || defined(OPENSSL_NO_PSK)
+static const long Cryptography_HAS_PSK = 0;
+int (*SSL_CTX_use_psk_identity_hint)(SSL_CTX *, const char *) = NULL;
+void (*SSL_CTX_set_psk_server_callback)(SSL_CTX *,
+                                        unsigned int (*)(
+                                            SSL *,
+                                            const char *,
+                                            unsigned char *,
+                                            unsigned int
+                                        )) = NULL;
+void (*SSL_CTX_set_psk_client_callback)(SSL_CTX *,
+                                        unsigned int (*)(
+                                            SSL *,
+                                            const char *,
+                                            char *,
+                                            unsigned int,
+                                            unsigned char *,
+                                            unsigned int
+                                        )) = NULL;
+#else
+static const long Cryptography_HAS_PSK = 1;
+#endif
+
+#if !CRYPTOGRAPHY_IS_LIBRESSL
+static const long Cryptography_HAS_CUSTOM_EXT = 1;
+#else
+static const long Cryptography_HAS_CUSTOM_EXT = 0;
+typedef int (*custom_ext_add_cb)(SSL *, unsigned int,
+                                 const unsigned char **,
+                                 size_t *, int *,
+                                 void *);
+typedef void (*custom_ext_free_cb)(SSL *, unsigned int,
+                                   const unsigned char *,
+                                   void *);
+typedef int (*custom_ext_parse_cb)(SSL *, unsigned int,
+                                   const unsigned char *,
+                                   size_t, int *,
+                                   void *);
+int (*SSL_CTX_add_client_custom_ext)(SSL_CTX *, unsigned int,
+                                     custom_ext_add_cb,
+                                     custom_ext_free_cb, void *,
+                                     custom_ext_parse_cb,
+                                     void *) = NULL;
+int (*SSL_CTX_add_server_custom_ext)(SSL_CTX *, unsigned int,
+                                     custom_ext_add_cb,
+                                     custom_ext_free_cb, void *,
+                                     custom_ext_parse_cb,
+                                     void *) = NULL;
+int (*SSL_extension_supported)(unsigned int) = NULL;
+#endif
+
+#ifndef OPENSSL_NO_SRTP
+static const long Cryptography_HAS_SRTP = 1;
+#else
+static const long Cryptography_HAS_SRTP = 0;
+int (*SSL_CTX_set_tlsext_use_srtp)(SSL_CTX *, const char *) = NULL;
+int (*SSL_set_tlsext_use_srtp)(SSL *, const char *) = NULL;
+SRTP_PROTECTION_PROFILE * (*SSL_get_selected_srtp_profile)(SSL *) = NULL;
+#endif
+
+#if CRYPTOGRAPHY_OPENSSL_LESS_THAN_111
+static const long Cryptography_HAS_TLSv1_3 = 0;
+static const long SSL_OP_NO_TLSv1_3 = 0;
+static const long SSL_VERIFY_POST_HANDSHAKE = 0;
+int (*SSL_CTX_set_ciphersuites)(SSL_CTX *, const char *) = NULL;
+int (*SSL_verify_client_post_handshake)(SSL *) = NULL;
+void (*SSL_CTX_set_post_handshake_auth)(SSL_CTX *, int) = NULL;
+void (*SSL_set_post_handshake_auth)(SSL *, int) = NULL;
+uint32_t (*SSL_SESSION_get_max_early_data)(const SSL_SESSION *) = NULL;
+int (*SSL_write_early_data)(SSL *, const void *, size_t, size_t *) = NULL;
+int (*SSL_read_early_data)(SSL *, void *, size_t, size_t *) = NULL;
+int (*SSL_CTX_set_max_early_data)(SSL_CTX *, uint32_t) = NULL;
+#else
+static const long Cryptography_HAS_TLSv1_3 = 1;
+#endif
+
+#if CRYPTOGRAPHY_OPENSSL_LESS_THAN_111 && !CRYPTOGRAPHY_IS_LIBRESSL
+static const long Cryptography_HAS_GET_PROTO_VERSION = 0;
+
+long (*SSL_CTX_get_min_proto_version)(SSL_CTX *) = NULL;
+long (*SSL_CTX_get_max_proto_version)(SSL_CTX *) = NULL;
+long (*SSL_get_min_proto_version)(SSL *) = NULL;
+long (*SSL_get_max_proto_version)(SSL *) = NULL;
+#else
+static const long Cryptography_HAS_GET_PROTO_VERSION = 1;
+#endif
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/x509.py b/contrib/python/cryptography/py2/_cffi_src/openssl/x509.py
new file mode 100644
index 0000000000..24946ea48d
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/x509.py
@@ -0,0 +1,302 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/ssl.h>
+
+/*
+ * This is part of a work-around for the difficulty cffi has in dealing with
+ * `STACK_OF(foo)` as the name of a type.  We invent a new, simpler name that
+ * will be an alias for this type and use the alias throughout.  This works
+ * together with another opaque typedef for the same name in the TYPES section.
+ * Note that the result is an opaque type.
+ */
+typedef STACK_OF(X509) Cryptography_STACK_OF_X509;
+typedef STACK_OF(X509_CRL) Cryptography_STACK_OF_X509_CRL;
+typedef STACK_OF(X509_REVOKED) Cryptography_STACK_OF_X509_REVOKED;
+"""
+
+TYPES = """
+typedef ... Cryptography_STACK_OF_X509;
+typedef ... Cryptography_STACK_OF_X509_CRL;
+typedef ... Cryptography_STACK_OF_X509_REVOKED;
+
+typedef struct {
+    ASN1_OBJECT *algorithm;
+    ...;
+} X509_ALGOR;
+
+typedef ... X509_ATTRIBUTE;
+typedef ... X509_EXTENSION;
+typedef ... X509_EXTENSIONS;
+typedef ... X509_REQ;
+typedef ... X509_REVOKED;
+typedef ... X509_CRL;
+typedef ... X509;
+
+typedef ... NETSCAPE_SPKI;
+
+typedef ... PKCS8_PRIV_KEY_INFO;
+
+typedef void (*sk_X509_EXTENSION_freefunc)(X509_EXTENSION *);
+"""
+
+FUNCTIONS = """
+X509 *X509_new(void);
+void X509_free(X509 *);
+X509 *X509_dup(X509 *);
+int X509_cmp(const X509 *, const X509 *);
+int X509_up_ref(X509 *);
+
+int X509_print_ex(BIO *, X509 *, unsigned long, unsigned long);
+
+int X509_set_version(X509 *, long);
+
+EVP_PKEY *X509_get_pubkey(X509 *);
+int X509_set_pubkey(X509 *, EVP_PKEY *);
+
+unsigned char *X509_alias_get0(X509 *, int *);
+int X509_sign(X509 *, EVP_PKEY *, const EVP_MD *);
+
+int X509_digest(const X509 *, const EVP_MD *, unsigned char *, unsigned int *);
+
+ASN1_TIME *X509_gmtime_adj(ASN1_TIME *, long);
+
+unsigned long X509_subject_name_hash(X509 *);
+
+int X509_set_subject_name(X509 *, X509_NAME *);
+
+int X509_set_issuer_name(X509 *, X509_NAME *);
+
+int X509_add_ext(X509 *, X509_EXTENSION *, int);
+X509_EXTENSION *X509_EXTENSION_dup(X509_EXTENSION *);
+
+ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *);
+void X509_EXTENSION_free(X509_EXTENSION *);
+
+int X509_REQ_set_version(X509_REQ *, long);
+X509_REQ *X509_REQ_new(void);
+void X509_REQ_free(X509_REQ *);
+int X509_REQ_set_pubkey(X509_REQ *, EVP_PKEY *);
+int X509_REQ_set_subject_name(X509_REQ *, X509_NAME *);
+int X509_REQ_sign(X509_REQ *, EVP_PKEY *, const EVP_MD *);
+int X509_REQ_verify(X509_REQ *, EVP_PKEY *);
+EVP_PKEY *X509_REQ_get_pubkey(X509_REQ *);
+int X509_REQ_print_ex(BIO *, X509_REQ *, unsigned long, unsigned long);
+int X509_REQ_add_extensions(X509_REQ *, X509_EXTENSIONS *);
+X509_EXTENSIONS *X509_REQ_get_extensions(X509_REQ *);
+X509_ATTRIBUTE *X509_REQ_get_attr(const X509_REQ *, int);
+int X509_REQ_get_attr_by_OBJ(const X509_REQ *, const ASN1_OBJECT *, int);
+void *X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *, int, int, void *);
+ASN1_TYPE *X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *, int);
+int X509_ATTRIBUTE_count(const X509_ATTRIBUTE *);
+int X509_REQ_add1_attr_by_OBJ(X509_REQ *, const ASN1_OBJECT *,
+                              int, const unsigned char *, int);
+
+int X509V3_EXT_print(BIO *, X509_EXTENSION *, unsigned long, int);
+ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *);
+
+X509_REVOKED *X509_REVOKED_new(void);
+void X509_REVOKED_free(X509_REVOKED *);
+
+int X509_REVOKED_set_serialNumber(X509_REVOKED *, ASN1_INTEGER *);
+
+int X509_REVOKED_add_ext(X509_REVOKED *, X509_EXTENSION*, int);
+int X509_REVOKED_add1_ext_i2d(X509_REVOKED *, int, void *, int, unsigned long);
+X509_EXTENSION *X509_REVOKED_delete_ext(X509_REVOKED *, int);
+
+int X509_REVOKED_set_revocationDate(X509_REVOKED *, ASN1_TIME *);
+
+X509_CRL *X509_CRL_new(void);
+X509_CRL *X509_CRL_dup(X509_CRL *);
+X509_CRL *d2i_X509_CRL_bio(BIO *, X509_CRL **);
+int X509_CRL_add0_revoked(X509_CRL *, X509_REVOKED *);
+int X509_CRL_add_ext(X509_CRL *, X509_EXTENSION *, int);
+int X509_CRL_cmp(const X509_CRL *, const X509_CRL *);
+int X509_CRL_print(BIO *, X509_CRL *);
+int X509_CRL_set_issuer_name(X509_CRL *, X509_NAME *);
+int X509_CRL_set_version(X509_CRL *, long);
+int X509_CRL_sign(X509_CRL *, EVP_PKEY *, const EVP_MD *);
+int X509_CRL_sort(X509_CRL *);
+int X509_CRL_verify(X509_CRL *, EVP_PKEY *);
+int i2d_X509_CRL_bio(BIO *, X509_CRL *);
+void X509_CRL_free(X509_CRL *);
+
+int NETSCAPE_SPKI_verify(NETSCAPE_SPKI *, EVP_PKEY *);
+int NETSCAPE_SPKI_sign(NETSCAPE_SPKI *, EVP_PKEY *, const EVP_MD *);
+char *NETSCAPE_SPKI_b64_encode(NETSCAPE_SPKI *);
+NETSCAPE_SPKI *NETSCAPE_SPKI_b64_decode(const char *, int);
+EVP_PKEY *NETSCAPE_SPKI_get_pubkey(NETSCAPE_SPKI *);
+int NETSCAPE_SPKI_set_pubkey(NETSCAPE_SPKI *, EVP_PKEY *);
+NETSCAPE_SPKI *NETSCAPE_SPKI_new(void);
+void NETSCAPE_SPKI_free(NETSCAPE_SPKI *);
+
+/*  ASN1 serialization */
+int i2d_X509_bio(BIO *, X509 *);
+X509 *d2i_X509_bio(BIO *, X509 **);
+
+int i2d_X509_REQ_bio(BIO *, X509_REQ *);
+X509_REQ *d2i_X509_REQ_bio(BIO *, X509_REQ **);
+
+int i2d_PrivateKey_bio(BIO *, EVP_PKEY *);
+EVP_PKEY *d2i_PrivateKey_bio(BIO *, EVP_PKEY **);
+int i2d_PUBKEY_bio(BIO *, EVP_PKEY *);
+EVP_PKEY *d2i_PUBKEY_bio(BIO *, EVP_PKEY **);
+
+ASN1_INTEGER *X509_get_serialNumber(X509 *);
+int X509_set_serialNumber(X509 *, ASN1_INTEGER *);
+
+const char *X509_verify_cert_error_string(long);
+
+const char *X509_get_default_cert_dir(void);
+const char *X509_get_default_cert_file(void);
+const char *X509_get_default_cert_dir_env(void);
+const char *X509_get_default_cert_file_env(void);
+
+int i2d_RSAPrivateKey_bio(BIO *, RSA *);
+RSA *d2i_RSAPublicKey_bio(BIO *, RSA **);
+int i2d_RSAPublicKey_bio(BIO *, RSA *);
+int i2d_DSAPrivateKey_bio(BIO *, DSA *);
+
+/* These became const X509 in 1.1.0 */
+int X509_get_ext_count(X509 *);
+X509_EXTENSION *X509_get_ext(X509 *, int);
+X509_NAME *X509_get_subject_name(X509 *);
+X509_NAME *X509_get_issuer_name(X509 *);
+
+/* This became const ASN1_OBJECT * in 1.1.0 */
+X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **,
+                                             ASN1_OBJECT *, int,
+                                             ASN1_OCTET_STRING *);
+
+
+/* This became const X509_EXTENSION * in 1.1.0 */
+int X509_EXTENSION_get_critical(X509_EXTENSION *);
+
+/* This became const X509_REVOKED * in 1.1.0 */
+int X509_REVOKED_get_ext_count(X509_REVOKED *);
+X509_EXTENSION *X509_REVOKED_get_ext(X509_REVOKED *, int);
+
+/* This became const X509_CRL * in 1.1.0 */
+X509_EXTENSION *X509_CRL_get_ext(X509_CRL *, int);
+int X509_CRL_get_ext_count(X509_CRL *);
+
+int X509_CRL_get0_by_serial(X509_CRL *, X509_REVOKED **, ASN1_INTEGER *);
+
+X509_REVOKED *X509_REVOKED_dup(X509_REVOKED *);
+X509_REVOKED *Cryptography_X509_REVOKED_dup(X509_REVOKED *);
+
+/* new in 1.0.2 */
+int i2d_re_X509_tbs(X509 *, unsigned char **);
+int X509_get_signature_nid(const X509 *);
+
+const X509_ALGOR *X509_get0_tbs_sigalg(const X509 *);
+
+void X509_get0_signature(const ASN1_BIT_STRING **,
+                         const X509_ALGOR **, const X509 *);
+
+long X509_get_version(X509 *);
+
+ASN1_TIME *X509_get_notBefore(X509 *);
+ASN1_TIME *X509_get_notAfter(X509 *);
+ASN1_TIME *X509_getm_notBefore(X509 *);
+ASN1_TIME *X509_getm_notAfter(X509 *);
+
+long X509_REQ_get_version(X509_REQ *);
+X509_NAME *X509_REQ_get_subject_name(X509_REQ *);
+
+Cryptography_STACK_OF_X509 *sk_X509_new_null(void);
+void sk_X509_free(Cryptography_STACK_OF_X509 *);
+int sk_X509_num(Cryptography_STACK_OF_X509 *);
+int sk_X509_push(Cryptography_STACK_OF_X509 *, X509 *);
+X509 *sk_X509_value(Cryptography_STACK_OF_X509 *, int);
+
+X509_EXTENSIONS *sk_X509_EXTENSION_new_null(void);
+int sk_X509_EXTENSION_num(X509_EXTENSIONS *);
+X509_EXTENSION *sk_X509_EXTENSION_value(X509_EXTENSIONS *, int);
+int sk_X509_EXTENSION_push(X509_EXTENSIONS *, X509_EXTENSION *);
+int sk_X509_EXTENSION_insert(X509_EXTENSIONS *, X509_EXTENSION *, int);
+X509_EXTENSION *sk_X509_EXTENSION_delete(X509_EXTENSIONS *, int);
+void sk_X509_EXTENSION_free(X509_EXTENSIONS *);
+void sk_X509_EXTENSION_pop_free(X509_EXTENSIONS *, sk_X509_EXTENSION_freefunc);
+
+int sk_X509_REVOKED_num(Cryptography_STACK_OF_X509_REVOKED *);
+X509_REVOKED *sk_X509_REVOKED_value(Cryptography_STACK_OF_X509_REVOKED *, int);
+
+Cryptography_STACK_OF_X509_CRL *sk_X509_CRL_new_null(void);
+void sk_X509_CRL_free(Cryptography_STACK_OF_X509_CRL *);
+int sk_X509_CRL_num(Cryptography_STACK_OF_X509_CRL *);
+int sk_X509_CRL_push(Cryptography_STACK_OF_X509_CRL *, X509_CRL *);
+X509_CRL *sk_X509_CRL_value(Cryptography_STACK_OF_X509_CRL *, int);
+
+long X509_CRL_get_version(X509_CRL *);
+ASN1_TIME *X509_CRL_get_lastUpdate(X509_CRL *);
+ASN1_TIME *X509_CRL_get_nextUpdate(X509_CRL *);
+X509_NAME *X509_CRL_get_issuer(X509_CRL *);
+Cryptography_STACK_OF_X509_REVOKED *X509_CRL_get_REVOKED(X509_CRL *);
+
+/* These aren't macros these arguments are all const X on openssl > 1.0.x */
+int X509_CRL_set_lastUpdate(X509_CRL *, ASN1_TIME *);
+int X509_CRL_set_nextUpdate(X509_CRL *, ASN1_TIME *);
+int X509_set_notBefore(X509 *, ASN1_TIME *);
+int X509_set_notAfter(X509 *, ASN1_TIME *);
+int X509_set1_notBefore(X509 *, ASN1_TIME *);
+int X509_set1_notAfter(X509 *, ASN1_TIME *);
+
+EC_KEY *d2i_EC_PUBKEY_bio(BIO *, EC_KEY **);
+int i2d_EC_PUBKEY_bio(BIO *, EC_KEY *);
+EC_KEY *d2i_ECPrivateKey_bio(BIO *, EC_KEY **);
+int i2d_ECPrivateKey_bio(BIO *, EC_KEY *);
+
+// declared in safestack
+int sk_ASN1_OBJECT_num(Cryptography_STACK_OF_ASN1_OBJECT *);
+ASN1_OBJECT *sk_ASN1_OBJECT_value(Cryptography_STACK_OF_ASN1_OBJECT *, int);
+void sk_ASN1_OBJECT_free(Cryptography_STACK_OF_ASN1_OBJECT *);
+Cryptography_STACK_OF_ASN1_OBJECT *sk_ASN1_OBJECT_new_null(void);
+int sk_ASN1_OBJECT_push(Cryptography_STACK_OF_ASN1_OBJECT *, ASN1_OBJECT *);
+
+/* these functions were added in 1.1.0 */
+const ASN1_INTEGER *X509_REVOKED_get0_serialNumber(const X509_REVOKED *);
+const ASN1_TIME *X509_REVOKED_get0_revocationDate(const X509_REVOKED *);
+void X509_CRL_get0_signature(const X509_CRL *, const ASN1_BIT_STRING **,
+                             const X509_ALGOR **);
+int i2d_re_X509_REQ_tbs(X509_REQ *, unsigned char **);
+int i2d_re_X509_CRL_tbs(X509_CRL *, unsigned char **);
+void X509_REQ_get0_signature(const X509_REQ *, const ASN1_BIT_STRING **,
+                             const X509_ALGOR **);
+"""
+
+CUSTOMIZATIONS = """
+#if CRYPTOGRAPHY_IS_LIBRESSL
+int i2d_re_X509_tbs(X509 *x, unsigned char **pp)
+{
+    /* in 1.0.2+ this function also sets x->cert_info->enc.modified = 1
+       but older OpenSSLs don't have the enc ASN1_ENCODING member in the
+       X509 struct.  Setting modified to 1 marks the encoding
+       (x->cert_info->enc.enc) as invalid, but since the entire struct isn't
+       present we don't care. */
+    return i2d_X509_CINF(x->cert_info, pp);
+}
+#endif
+
+/* Being kept around for pyOpenSSL */
+X509_REVOKED *Cryptography_X509_REVOKED_dup(X509_REVOKED *rev) {
+    return X509_REVOKED_dup(rev);
+}
+/* Added in 1.1.0 but we need it in all versions now due to the great
+   opaquing. */
+#if CRYPTOGRAPHY_IS_LIBRESSL
+int i2d_re_X509_REQ_tbs(X509_REQ *req, unsigned char **pp)
+{
+    req->req_info->enc.modified = 1;
+    return i2d_X509_REQ_INFO(req->req_info, pp);
+}
+int i2d_re_X509_CRL_tbs(X509_CRL *crl, unsigned char **pp) {
+    crl->crl->enc.modified = 1;
+    return i2d_X509_CRL_INFO(crl->crl, pp);
+}
+#endif
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/x509_vfy.py b/contrib/python/cryptography/py2/_cffi_src/openssl/x509_vfy.py
new file mode 100644
index 0000000000..ba3d3dbb14
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/x509_vfy.py
@@ -0,0 +1,255 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/x509_vfy.h>
+
+/*
+ * This is part of a work-around for the difficulty cffi has in dealing with
+ * `STACK_OF(foo)` as the name of a type.  We invent a new, simpler name that
+ * will be an alias for this type and use the alias throughout.  This works
+ * together with another opaque typedef for the same name in the TYPES section.
+ * Note that the result is an opaque type.
+ */
+typedef STACK_OF(ASN1_OBJECT) Cryptography_STACK_OF_ASN1_OBJECT;
+typedef STACK_OF(X509_OBJECT) Cryptography_STACK_OF_X509_OBJECT;
+"""
+
+TYPES = """
+static const long Cryptography_HAS_102_VERIFICATION;
+static const long Cryptography_HAS_110_VERIFICATION_PARAMS;
+static const long Cryptography_HAS_X509_STORE_CTX_GET_ISSUER;
+
+typedef ... Cryptography_STACK_OF_ASN1_OBJECT;
+typedef ... Cryptography_STACK_OF_X509_OBJECT;
+
+typedef ... X509_OBJECT;
+typedef ... X509_STORE;
+typedef ... X509_VERIFY_PARAM;
+typedef ... X509_STORE_CTX;
+
+typedef int (*X509_STORE_CTX_get_issuer_fn)(X509 **, X509_STORE_CTX *, X509 *);
+
+/* While these are defined in the source as ints, they're tagged here
+   as longs, just in case they ever grow to large, such as what we saw
+   with OP_ALL. */
+
+/* Verification error codes */
+static const int X509_V_OK;
+static const int X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT;
+static const int X509_V_ERR_UNABLE_TO_GET_CRL;
+static const int X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE;
+static const int X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE;
+static const int X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
+static const int X509_V_ERR_CERT_SIGNATURE_FAILURE;
+static const int X509_V_ERR_CRL_SIGNATURE_FAILURE;
+static const int X509_V_ERR_CERT_NOT_YET_VALID;
+static const int X509_V_ERR_CERT_HAS_EXPIRED;
+static const int X509_V_ERR_CRL_NOT_YET_VALID;
+static const int X509_V_ERR_CRL_HAS_EXPIRED;
+static const int X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD;
+static const int X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD;
+static const int X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD;
+static const int X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD;
+static const int X509_V_ERR_OUT_OF_MEM;
+static const int X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT;
+static const int X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
+static const int X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY;
+static const int X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE;
+static const int X509_V_ERR_CERT_CHAIN_TOO_LONG;
+static const int X509_V_ERR_CERT_REVOKED;
+static const int X509_V_ERR_INVALID_CA;
+static const int X509_V_ERR_PATH_LENGTH_EXCEEDED;
+static const int X509_V_ERR_INVALID_PURPOSE;
+static const int X509_V_ERR_CERT_UNTRUSTED;
+static const int X509_V_ERR_CERT_REJECTED;
+static const int X509_V_ERR_SUBJECT_ISSUER_MISMATCH;
+static const int X509_V_ERR_AKID_SKID_MISMATCH;
+static const int X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH;
+static const int X509_V_ERR_KEYUSAGE_NO_CERTSIGN;
+static const int X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER;
+static const int X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION;
+static const int X509_V_ERR_KEYUSAGE_NO_CRL_SIGN;
+static const int X509_V_ERR_UNHANDLED_CRITICAL_CRL_EXTENSION;
+static const int X509_V_ERR_INVALID_NON_CA;
+static const int X509_V_ERR_PROXY_PATH_LENGTH_EXCEEDED;
+static const int X509_V_ERR_KEYUSAGE_NO_DIGITAL_SIGNATURE;
+static const int X509_V_ERR_PROXY_CERTIFICATES_NOT_ALLOWED;
+static const int X509_V_ERR_INVALID_EXTENSION;
+static const int X509_V_ERR_INVALID_POLICY_EXTENSION;
+static const int X509_V_ERR_NO_EXPLICIT_POLICY;
+static const int X509_V_ERR_DIFFERENT_CRL_SCOPE;
+static const int X509_V_ERR_UNSUPPORTED_EXTENSION_FEATURE;
+static const int X509_V_ERR_UNNESTED_RESOURCE;
+static const int X509_V_ERR_PERMITTED_VIOLATION;
+static const int X509_V_ERR_EXCLUDED_VIOLATION;
+static const int X509_V_ERR_SUBTREE_MINMAX;
+static const int X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE;
+static const int X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX;
+static const int X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
+static const int X509_V_ERR_CRL_PATH_VALIDATION_ERROR;
+static const int X509_V_ERR_SUITE_B_INVALID_VERSION;
+static const int X509_V_ERR_SUITE_B_INVALID_ALGORITHM;
+static const int X509_V_ERR_SUITE_B_INVALID_CURVE;
+static const int X509_V_ERR_SUITE_B_INVALID_SIGNATURE_ALGORITHM;
+static const int X509_V_ERR_SUITE_B_LOS_NOT_ALLOWED;
+static const int X509_V_ERR_SUITE_B_CANNOT_SIGN_P_384_WITH_P_256;
+static const int X509_V_ERR_HOSTNAME_MISMATCH;
+static const int X509_V_ERR_EMAIL_MISMATCH;
+static const int X509_V_ERR_IP_ADDRESS_MISMATCH;
+static const int X509_V_ERR_APPLICATION_VERIFICATION;
+
+/* Verification parameters */
+static const long X509_V_FLAG_CB_ISSUER_CHECK;
+static const long X509_V_FLAG_USE_CHECK_TIME;
+static const long X509_V_FLAG_CRL_CHECK;
+static const long X509_V_FLAG_CRL_CHECK_ALL;
+static const long X509_V_FLAG_IGNORE_CRITICAL;
+static const long X509_V_FLAG_X509_STRICT;
+static const long X509_V_FLAG_ALLOW_PROXY_CERTS;
+static const long X509_V_FLAG_POLICY_CHECK;
+static const long X509_V_FLAG_EXPLICIT_POLICY;
+static const long X509_V_FLAG_INHIBIT_ANY;
+static const long X509_V_FLAG_INHIBIT_MAP;
+static const long X509_V_FLAG_NOTIFY_POLICY;
+static const long X509_V_FLAG_EXTENDED_CRL_SUPPORT;
+static const long X509_V_FLAG_USE_DELTAS;
+static const long X509_V_FLAG_CHECK_SS_SIGNATURE;
+static const long X509_V_FLAG_TRUSTED_FIRST;
+static const long X509_V_FLAG_SUITEB_128_LOS_ONLY;
+static const long X509_V_FLAG_SUITEB_192_LOS;
+static const long X509_V_FLAG_SUITEB_128_LOS;
+static const long X509_V_FLAG_PARTIAL_CHAIN;
+
+static const long X509_LU_X509;
+static const long X509_LU_CRL;
+
+static const long X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT;
+static const long X509_CHECK_FLAG_NO_WILDCARDS;
+static const long X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS;
+static const long X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS;
+static const long X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS;
+static const long X509_CHECK_FLAG_NEVER_CHECK_SUBJECT;
+"""
+
+FUNCTIONS = """
+int X509_verify_cert(X509_STORE_CTX *);
+
+/* X509_STORE */
+X509_STORE *X509_STORE_new(void);
+int X509_STORE_add_cert(X509_STORE *, X509 *);
+int X509_STORE_add_crl(X509_STORE *, X509_CRL *);
+int X509_STORE_load_locations(X509_STORE *, const char *, const char *);
+int X509_STORE_set1_param(X509_STORE *, X509_VERIFY_PARAM *);
+int X509_STORE_set_default_paths(X509_STORE *);
+int X509_STORE_set_flags(X509_STORE *, unsigned long);
+void X509_STORE_free(X509_STORE *);
+
+/* X509_STORE_CTX */
+X509_STORE_CTX *X509_STORE_CTX_new(void);
+void X509_STORE_CTX_cleanup(X509_STORE_CTX *);
+void X509_STORE_CTX_free(X509_STORE_CTX *);
+int X509_STORE_CTX_init(X509_STORE_CTX *, X509_STORE *, X509 *,
+                        Cryptography_STACK_OF_X509 *);
+void X509_STORE_CTX_trusted_stack(X509_STORE_CTX *,
+                                  Cryptography_STACK_OF_X509 *);
+void X509_STORE_CTX_set_cert(X509_STORE_CTX *, X509 *);
+void X509_STORE_CTX_set_chain(X509_STORE_CTX *,Cryptography_STACK_OF_X509 *);
+X509_VERIFY_PARAM *X509_STORE_CTX_get0_param(X509_STORE_CTX *);
+void X509_STORE_CTX_set0_param(X509_STORE_CTX *, X509_VERIFY_PARAM *);
+int X509_STORE_CTX_set_default(X509_STORE_CTX *, const char *);
+void X509_STORE_CTX_set_verify_cb(X509_STORE_CTX *,
+                                  int (*)(int, X509_STORE_CTX *));
+Cryptography_STACK_OF_X509 *X509_STORE_CTX_get_chain(X509_STORE_CTX *);
+Cryptography_STACK_OF_X509 *X509_STORE_CTX_get1_chain(X509_STORE_CTX *);
+int X509_STORE_CTX_get_error(X509_STORE_CTX *);
+void X509_STORE_CTX_set_error(X509_STORE_CTX *, int);
+int X509_STORE_CTX_get_error_depth(X509_STORE_CTX *);
+X509 *X509_STORE_CTX_get_current_cert(X509_STORE_CTX *);
+int X509_STORE_CTX_set_ex_data(X509_STORE_CTX *, int, void *);
+void *X509_STORE_CTX_get_ex_data(X509_STORE_CTX *, int);
+int X509_STORE_CTX_get1_issuer(X509 **, X509_STORE_CTX *, X509 *);
+
+/* X509_VERIFY_PARAM */
+X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void);
+int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *, unsigned long);
+int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *, unsigned long);
+unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *);
+int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *, int);
+int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *, int);
+void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *, time_t);
+int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *, ASN1_OBJECT *);
+int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *,
+                                    Cryptography_STACK_OF_ASN1_OBJECT *);
+void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *, int);
+int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *);
+void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *);
+/* this CRYPTO_EX_DATA function became a macro in 1.1.0 */
+int X509_STORE_CTX_get_ex_new_index(long, void *, CRYPTO_EX_new *,
+                                    CRYPTO_EX_dup *, CRYPTO_EX_free *);
+
+/* X509_STORE_CTX */
+void X509_STORE_CTX_set0_crls(X509_STORE_CTX *,
+                              Cryptography_STACK_OF_X509_CRL *);
+
+/* X509_VERIFY_PARAM */
+int X509_VERIFY_PARAM_set1_host(X509_VERIFY_PARAM *, const char *,
+                                size_t);
+void X509_VERIFY_PARAM_set_hostflags(X509_VERIFY_PARAM *, unsigned int);
+int X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM *, const char *,
+                                 size_t);
+int X509_VERIFY_PARAM_set1_ip(X509_VERIFY_PARAM *, const unsigned char *,
+                              size_t);
+int X509_VERIFY_PARAM_set1_ip_asc(X509_VERIFY_PARAM *, const char *);
+
+int sk_X509_OBJECT_num(Cryptography_STACK_OF_X509_OBJECT *);
+X509_OBJECT *sk_X509_OBJECT_value(Cryptography_STACK_OF_X509_OBJECT *, int);
+X509_VERIFY_PARAM *X509_STORE_get0_param(X509_STORE *);
+Cryptography_STACK_OF_X509_OBJECT *X509_STORE_get0_objects(X509_STORE *);
+X509 *X509_OBJECT_get0_X509(X509_OBJECT *);
+int X509_OBJECT_get_type(const X509_OBJECT *);
+
+/* added in 1.1.0 */
+X509 *X509_STORE_CTX_get0_cert(X509_STORE_CTX *);
+X509_STORE_CTX_get_issuer_fn X509_STORE_get_get_issuer(X509_STORE *);
+void X509_STORE_set_get_issuer(X509_STORE *, X509_STORE_CTX_get_issuer_fn);
+"""
+
+CUSTOMIZATIONS = """
+#if !CRYPTOGRAPHY_IS_LIBRESSL
+static const long Cryptography_HAS_102_VERIFICATION = 1;
+#else
+static const long Cryptography_HAS_102_VERIFICATION = 0;
+static const long X509_V_ERR_SUITE_B_INVALID_VERSION = 0;
+static const long X509_V_ERR_SUITE_B_INVALID_ALGORITHM = 0;
+static const long X509_V_ERR_SUITE_B_INVALID_CURVE = 0;
+static const long X509_V_ERR_SUITE_B_INVALID_SIGNATURE_ALGORITHM = 0;
+static const long X509_V_ERR_SUITE_B_LOS_NOT_ALLOWED = 0;
+static const long X509_V_ERR_SUITE_B_CANNOT_SIGN_P_384_WITH_P_256 = 0;
+static const long X509_V_FLAG_SUITEB_128_LOS_ONLY = 0;
+static const long X509_V_FLAG_SUITEB_192_LOS = 0;
+static const long X509_V_FLAG_SUITEB_128_LOS = 0;
+#endif
+
+#if CRYPTOGRAPHY_IS_LIBRESSL
+static const long Cryptography_HAS_110_VERIFICATION_PARAMS = 0;
+#ifndef X509_CHECK_FLAG_NEVER_CHECK_SUBJECT
+static const long X509_CHECK_FLAG_NEVER_CHECK_SUBJECT = 0;
+#endif
+#else
+static const long Cryptography_HAS_110_VERIFICATION_PARAMS = 1;
+#endif
+
+#if CRYPTOGRAPHY_IS_LIBRESSL
+static const long Cryptography_HAS_X509_STORE_CTX_GET_ISSUER = 0;
+typedef void *X509_STORE_CTX_get_issuer_fn;
+X509_STORE_CTX_get_issuer_fn (*X509_STORE_get_get_issuer)(X509_STORE *) = NULL;
+void (*X509_STORE_set_get_issuer)(X509_STORE *,
+                                  X509_STORE_CTX_get_issuer_fn) = NULL;
+#else
+static const long Cryptography_HAS_X509_STORE_CTX_GET_ISSUER = 1;
+#endif
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/x509name.py b/contrib/python/cryptography/py2/_cffi_src/openssl/x509name.py
new file mode 100644
index 0000000000..1fbe26aa74
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/x509name.py
@@ -0,0 +1,78 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/x509.h>
+
+/*
+ * See the comment above Cryptography_STACK_OF_X509 in x509.py
+ */
+typedef STACK_OF(X509_NAME) Cryptography_STACK_OF_X509_NAME;
+typedef STACK_OF(X509_NAME_ENTRY) Cryptography_STACK_OF_X509_NAME_ENTRY;
+"""
+
+TYPES = """
+typedef ... Cryptography_STACK_OF_X509_NAME_ENTRY;
+typedef ... X509_NAME;
+typedef ... X509_NAME_ENTRY;
+typedef ... Cryptography_STACK_OF_X509_NAME;
+"""
+
+FUNCTIONS = """
+X509_NAME *X509_NAME_new(void);
+void X509_NAME_free(X509_NAME *);
+
+unsigned long X509_NAME_hash(X509_NAME *);
+
+int i2d_X509_NAME(X509_NAME *, unsigned char **);
+int X509_NAME_add_entry_by_txt(X509_NAME *, const char *, int,
+                               const unsigned char *, int, int, int);
+X509_NAME_ENTRY *X509_NAME_delete_entry(X509_NAME *, int);
+void X509_NAME_ENTRY_free(X509_NAME_ENTRY *);
+int X509_NAME_get_index_by_NID(X509_NAME *, int, int);
+int X509_NAME_cmp(const X509_NAME *, const X509_NAME *);
+X509_NAME *X509_NAME_dup(X509_NAME *);
+int X509_NAME_ENTRY_set(X509_NAME_ENTRY *);
+/* These became const X509_NAME * in 1.1.0 */
+int X509_NAME_entry_count(X509_NAME *);
+X509_NAME_ENTRY *X509_NAME_get_entry(X509_NAME *, int);
+char *X509_NAME_oneline(X509_NAME *, char *, int);
+int X509_NAME_print_ex(BIO *, X509_NAME *, int, unsigned long);
+
+/* These became const X509_NAME_ENTRY * in 1.1.0 */
+ASN1_OBJECT *X509_NAME_ENTRY_get_object(X509_NAME_ENTRY *);
+ASN1_STRING *X509_NAME_ENTRY_get_data(X509_NAME_ENTRY *);
+int X509_NAME_add_entry(X509_NAME *, X509_NAME_ENTRY *, int, int);
+
+/* this became const unsigned char * in 1.1.0 */
+int X509_NAME_add_entry_by_NID(X509_NAME *, int, int, unsigned char *,
+                               int, int, int);
+
+/* These became const ASN1_OBJECT * in 1.1.0 */
+X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_OBJ(X509_NAME_ENTRY **,
+                                               ASN1_OBJECT *, int,
+                                               const unsigned char *, int);
+int X509_NAME_add_entry_by_OBJ(X509_NAME *, ASN1_OBJECT *, int,
+                               unsigned char *, int, int, int);
+
+Cryptography_STACK_OF_X509_NAME *sk_X509_NAME_new_null(void);
+int sk_X509_NAME_num(Cryptography_STACK_OF_X509_NAME *);
+int sk_X509_NAME_push(Cryptography_STACK_OF_X509_NAME *, X509_NAME *);
+X509_NAME *sk_X509_NAME_value(Cryptography_STACK_OF_X509_NAME *, int);
+void sk_X509_NAME_free(Cryptography_STACK_OF_X509_NAME *);
+int sk_X509_NAME_ENTRY_num(Cryptography_STACK_OF_X509_NAME_ENTRY *);
+Cryptography_STACK_OF_X509_NAME_ENTRY *sk_X509_NAME_ENTRY_new_null(void);
+int sk_X509_NAME_ENTRY_push(Cryptography_STACK_OF_X509_NAME_ENTRY *,
+                            X509_NAME_ENTRY *);
+X509_NAME_ENTRY *sk_X509_NAME_ENTRY_value(
+    Cryptography_STACK_OF_X509_NAME_ENTRY *, int);
+Cryptography_STACK_OF_X509_NAME_ENTRY *sk_X509_NAME_ENTRY_dup(
+    Cryptography_STACK_OF_X509_NAME_ENTRY *
+);
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/openssl/x509v3.py b/contrib/python/cryptography/py2/_cffi_src/openssl/x509v3.py
new file mode 100644
index 0000000000..5968120652
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/openssl/x509v3.py
@@ -0,0 +1,314 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+INCLUDES = """
+#include <openssl/x509v3.h>
+
+/*
+ * This is part of a work-around for the difficulty cffi has in dealing with
+ * `LHASH_OF(foo)` as the name of a type.  We invent a new, simpler name that
+ * will be an alias for this type and use the alias throughout.  This works
+ * together with another opaque typedef for the same name in the TYPES section.
+ * Note that the result is an opaque type.
+ */
+typedef LHASH_OF(CONF_VALUE) Cryptography_LHASH_OF_CONF_VALUE;
+
+typedef STACK_OF(ACCESS_DESCRIPTION) Cryptography_STACK_OF_ACCESS_DESCRIPTION;
+typedef STACK_OF(DIST_POINT) Cryptography_STACK_OF_DIST_POINT;
+typedef STACK_OF(POLICYQUALINFO) Cryptography_STACK_OF_POLICYQUALINFO;
+typedef STACK_OF(POLICYINFO) Cryptography_STACK_OF_POLICYINFO;
+typedef STACK_OF(ASN1_INTEGER) Cryptography_STACK_OF_ASN1_INTEGER;
+typedef STACK_OF(GENERAL_SUBTREE) Cryptography_STACK_OF_GENERAL_SUBTREE;
+"""
+
+TYPES = """
+typedef ... Cryptography_STACK_OF_ACCESS_DESCRIPTION;
+typedef ... Cryptography_STACK_OF_POLICYQUALINFO;
+typedef ... Cryptography_STACK_OF_POLICYINFO;
+typedef ... Cryptography_STACK_OF_ASN1_INTEGER;
+typedef ... Cryptography_STACK_OF_GENERAL_SUBTREE;
+typedef ... EXTENDED_KEY_USAGE;
+typedef ... CONF;
+
+typedef struct {
+    X509 *issuer_cert;
+    X509 *subject_cert;
+    ...;
+} X509V3_CTX;
+
+typedef void * (*X509V3_EXT_D2I)(void *, const unsigned char **, long);
+
+static const int GEN_OTHERNAME;
+static const int GEN_EMAIL;
+static const int GEN_X400;
+static const int GEN_DNS;
+static const int GEN_URI;
+static const int GEN_DIRNAME;
+static const int GEN_EDIPARTY;
+static const int GEN_IPADD;
+static const int GEN_RID;
+
+typedef struct {
+    ASN1_OBJECT *type_id;
+    ASN1_TYPE *value;
+} OTHERNAME;
+
+typedef struct {
+    ...;
+} EDIPARTYNAME;
+
+typedef struct {
+    int ca;
+    ASN1_INTEGER *pathlen;
+} BASIC_CONSTRAINTS;
+
+typedef struct {
+    Cryptography_STACK_OF_GENERAL_SUBTREE *permittedSubtrees;
+    Cryptography_STACK_OF_GENERAL_SUBTREE *excludedSubtrees;
+} NAME_CONSTRAINTS;
+
+typedef struct {
+    ASN1_INTEGER *requireExplicitPolicy;
+    ASN1_INTEGER *inhibitPolicyMapping;
+} POLICY_CONSTRAINTS;
+
+
+typedef struct {
+    int type;
+    union {
+        char *ptr;
+        OTHERNAME *otherName;  /* otherName */
+        ASN1_IA5STRING *rfc822Name;
+        ASN1_IA5STRING *dNSName;
+        ASN1_TYPE *x400Address;
+        X509_NAME *directoryName;
+        EDIPARTYNAME *ediPartyName;
+        ASN1_IA5STRING *uniformResourceIdentifier;
+        ASN1_OCTET_STRING *iPAddress;
+        ASN1_OBJECT *registeredID;
+
+        /* Old names */
+        ASN1_OCTET_STRING *ip; /* iPAddress */
+        X509_NAME *dirn;       /* dirn */
+        ASN1_IA5STRING *ia5;   /* rfc822Name, dNSName, */
+                               /*   uniformResourceIdentifier */
+        ASN1_OBJECT *rid;      /* registeredID */
+        ASN1_TYPE *other;      /* x400Address */
+    } d;
+    ...;
+} GENERAL_NAME;
+
+typedef struct {
+    GENERAL_NAME *base;
+    ASN1_INTEGER *minimum;
+    ASN1_INTEGER *maximum;
+} GENERAL_SUBTREE;
+
+typedef struct stack_st_GENERAL_NAME GENERAL_NAMES;
+
+typedef struct {
+    ASN1_OCTET_STRING *keyid;
+    GENERAL_NAMES *issuer;
+    ASN1_INTEGER *serial;
+} AUTHORITY_KEYID;
+
+typedef struct {
+    ASN1_OBJECT *method;
+    GENERAL_NAME *location;
+} ACCESS_DESCRIPTION;
+
+typedef ... Cryptography_LHASH_OF_CONF_VALUE;
+
+
+typedef ... Cryptography_STACK_OF_DIST_POINT;
+
+typedef struct {
+    int type;
+    union {
+        GENERAL_NAMES *fullname;
+        Cryptography_STACK_OF_X509_NAME_ENTRY *relativename;
+    } name;
+    ...;
+} DIST_POINT_NAME;
+
+typedef struct {
+    DIST_POINT_NAME *distpoint;
+    ASN1_BIT_STRING *reasons;
+    GENERAL_NAMES *CRLissuer;
+    ...;
+} DIST_POINT;
+
+typedef struct {
+    DIST_POINT_NAME *distpoint;
+    int onlyuser;
+    int onlyCA;
+    ASN1_BIT_STRING *onlysomereasons;
+    int indirectCRL;
+    int onlyattr;
+} ISSUING_DIST_POINT;
+
+typedef struct {
+    ASN1_STRING *organization;
+    Cryptography_STACK_OF_ASN1_INTEGER *noticenos;
+} NOTICEREF;
+
+typedef struct {
+    NOTICEREF *noticeref;
+    ASN1_STRING *exptext;
+} USERNOTICE;
+
+typedef struct {
+    ASN1_OBJECT *pqualid;
+    union {
+        ASN1_IA5STRING *cpsuri;
+        USERNOTICE *usernotice;
+        ASN1_TYPE *other;
+    } d;
+} POLICYQUALINFO;
+
+typedef struct {
+    ASN1_OBJECT *policyid;
+    Cryptography_STACK_OF_POLICYQUALINFO *qualifiers;
+} POLICYINFO;
+
+typedef void (*sk_GENERAL_NAME_freefunc)(GENERAL_NAME *);
+typedef void (*sk_DIST_POINT_freefunc)(DIST_POINT *);
+typedef void (*sk_POLICYINFO_freefunc)(POLICYINFO *);
+typedef void (*sk_ACCESS_DESCRIPTION_freefunc)(ACCESS_DESCRIPTION *);
+"""
+
+
+FUNCTIONS = """
+int X509V3_EXT_add_alias(int, int);
+void X509V3_set_ctx(X509V3_CTX *, X509 *, X509 *, X509_REQ *, X509_CRL *, int);
+int GENERAL_NAME_print(BIO *, GENERAL_NAME *);
+GENERAL_NAMES *GENERAL_NAMES_new(void);
+void GENERAL_NAMES_free(GENERAL_NAMES *);
+void *X509V3_EXT_d2i(X509_EXTENSION *);
+int X509_check_ca(X509 *);
+/* X509 became a const arg in 1.1.0 */
+void *X509_get_ext_d2i(X509 *, int, int *, int *);
+/* The last two char * args became const char * in 1.1.0 */
+X509_EXTENSION *X509V3_EXT_nconf(CONF *, X509V3_CTX *, char *, char *);
+/* This is a macro defined by a call to DECLARE_ASN1_FUNCTIONS in the
+   x509v3.h header. */
+BASIC_CONSTRAINTS *BASIC_CONSTRAINTS_new(void);
+void BASIC_CONSTRAINTS_free(BASIC_CONSTRAINTS *);
+/* This is a macro defined by a call to DECLARE_ASN1_FUNCTIONS in the
+   x509v3.h header. */
+AUTHORITY_KEYID *AUTHORITY_KEYID_new(void);
+void AUTHORITY_KEYID_free(AUTHORITY_KEYID *);
+
+NAME_CONSTRAINTS *NAME_CONSTRAINTS_new(void);
+void NAME_CONSTRAINTS_free(NAME_CONSTRAINTS *);
+
+OTHERNAME *OTHERNAME_new(void);
+void OTHERNAME_free(OTHERNAME *);
+
+POLICY_CONSTRAINTS *POLICY_CONSTRAINTS_new(void);
+void POLICY_CONSTRAINTS_free(POLICY_CONSTRAINTS *);
+
+void *X509V3_set_ctx_nodb(X509V3_CTX *);
+
+int i2d_GENERAL_NAMES(GENERAL_NAMES *, unsigned char **);
+GENERAL_NAMES *d2i_GENERAL_NAMES(GENERAL_NAMES **, const unsigned char **,
+                                 long);
+
+int sk_GENERAL_NAME_num(struct stack_st_GENERAL_NAME *);
+int sk_GENERAL_NAME_push(struct stack_st_GENERAL_NAME *, GENERAL_NAME *);
+GENERAL_NAME *sk_GENERAL_NAME_value(struct stack_st_GENERAL_NAME *, int);
+void sk_GENERAL_NAME_pop_free(struct stack_st_GENERAL_NAME *,
+                              sk_GENERAL_NAME_freefunc);
+
+Cryptography_STACK_OF_ACCESS_DESCRIPTION *sk_ACCESS_DESCRIPTION_new_null(void);
+int sk_ACCESS_DESCRIPTION_num(Cryptography_STACK_OF_ACCESS_DESCRIPTION *);
+ACCESS_DESCRIPTION *sk_ACCESS_DESCRIPTION_value(
+    Cryptography_STACK_OF_ACCESS_DESCRIPTION *, int
+);
+void sk_ACCESS_DESCRIPTION_free(Cryptography_STACK_OF_ACCESS_DESCRIPTION *);
+void sk_ACCESS_DESCRIPTION_pop_free(Cryptography_STACK_OF_ACCESS_DESCRIPTION *,
+                              sk_ACCESS_DESCRIPTION_freefunc);
+int sk_ACCESS_DESCRIPTION_push(Cryptography_STACK_OF_ACCESS_DESCRIPTION *,
+                               ACCESS_DESCRIPTION *);
+
+ACCESS_DESCRIPTION *ACCESS_DESCRIPTION_new(void);
+void ACCESS_DESCRIPTION_free(ACCESS_DESCRIPTION *);
+
+X509_EXTENSION *X509V3_EXT_conf_nid(Cryptography_LHASH_OF_CONF_VALUE *,
+                                    X509V3_CTX *, int, char *);
+
+Cryptography_STACK_OF_DIST_POINT *sk_DIST_POINT_new_null(void);
+void sk_DIST_POINT_free(Cryptography_STACK_OF_DIST_POINT *);
+int sk_DIST_POINT_num(Cryptography_STACK_OF_DIST_POINT *);
+DIST_POINT *sk_DIST_POINT_value(Cryptography_STACK_OF_DIST_POINT *, int);
+int sk_DIST_POINT_push(Cryptography_STACK_OF_DIST_POINT *, DIST_POINT *);
+void sk_DIST_POINT_pop_free(Cryptography_STACK_OF_DIST_POINT *,
+                            sk_DIST_POINT_freefunc);
+void CRL_DIST_POINTS_free(Cryptography_STACK_OF_DIST_POINT *);
+
+void sk_POLICYINFO_free(Cryptography_STACK_OF_POLICYINFO *);
+int sk_POLICYINFO_num(Cryptography_STACK_OF_POLICYINFO *);
+POLICYINFO *sk_POLICYINFO_value(Cryptography_STACK_OF_POLICYINFO *, int);
+int sk_POLICYINFO_push(Cryptography_STACK_OF_POLICYINFO *, POLICYINFO *);
+Cryptography_STACK_OF_POLICYINFO *sk_POLICYINFO_new_null(void);
+void sk_POLICYINFO_pop_free(Cryptography_STACK_OF_POLICYINFO *,
+                            sk_POLICYINFO_freefunc);
+void CERTIFICATEPOLICIES_free(Cryptography_STACK_OF_POLICYINFO *);
+
+POLICYINFO *POLICYINFO_new(void);
+void POLICYINFO_free(POLICYINFO *);
+
+POLICYQUALINFO *POLICYQUALINFO_new(void);
+void POLICYQUALINFO_free(POLICYQUALINFO *);
+
+NOTICEREF *NOTICEREF_new(void);
+void NOTICEREF_free(NOTICEREF *);
+
+USERNOTICE *USERNOTICE_new(void);
+void USERNOTICE_free(USERNOTICE *);
+
+void sk_POLICYQUALINFO_free(Cryptography_STACK_OF_POLICYQUALINFO *);
+int sk_POLICYQUALINFO_num(Cryptography_STACK_OF_POLICYQUALINFO *);
+POLICYQUALINFO *sk_POLICYQUALINFO_value(Cryptography_STACK_OF_POLICYQUALINFO *,
+                                        int);
+int sk_POLICYQUALINFO_push(Cryptography_STACK_OF_POLICYQUALINFO *,
+                           POLICYQUALINFO *);
+Cryptography_STACK_OF_POLICYQUALINFO *sk_POLICYQUALINFO_new_null(void);
+
+Cryptography_STACK_OF_GENERAL_SUBTREE *sk_GENERAL_SUBTREE_new_null(void);
+void sk_GENERAL_SUBTREE_free(Cryptography_STACK_OF_GENERAL_SUBTREE *);
+int sk_GENERAL_SUBTREE_num(Cryptography_STACK_OF_GENERAL_SUBTREE *);
+GENERAL_SUBTREE *sk_GENERAL_SUBTREE_value(
+    Cryptography_STACK_OF_GENERAL_SUBTREE *, int
+);
+int sk_GENERAL_SUBTREE_push(Cryptography_STACK_OF_GENERAL_SUBTREE *,
+                            GENERAL_SUBTREE *);
+
+GENERAL_SUBTREE *GENERAL_SUBTREE_new(void);
+
+void sk_ASN1_INTEGER_free(Cryptography_STACK_OF_ASN1_INTEGER *);
+int sk_ASN1_INTEGER_num(Cryptography_STACK_OF_ASN1_INTEGER *);
+ASN1_INTEGER *sk_ASN1_INTEGER_value(Cryptography_STACK_OF_ASN1_INTEGER *, int);
+int sk_ASN1_INTEGER_push(Cryptography_STACK_OF_ASN1_INTEGER *, ASN1_INTEGER *);
+Cryptography_STACK_OF_ASN1_INTEGER *sk_ASN1_INTEGER_new_null(void);
+
+X509_EXTENSION *X509V3_EXT_i2d(int, int, void *);
+
+DIST_POINT *DIST_POINT_new(void);
+void DIST_POINT_free(DIST_POINT *);
+
+DIST_POINT_NAME *DIST_POINT_NAME_new(void);
+void DIST_POINT_NAME_free(DIST_POINT_NAME *);
+
+GENERAL_NAME *GENERAL_NAME_new(void);
+void GENERAL_NAME_free(GENERAL_NAME *);
+
+ISSUING_DIST_POINT *ISSUING_DIST_POINT_new(void);
+void ISSUING_DIST_POINT_free(ISSUING_DIST_POINT *);
+"""
+
+CUSTOMIZATIONS = """
+"""
diff --git a/contrib/python/cryptography/py2/_cffi_src/utils.py b/contrib/python/cryptography/py2/_cffi_src/utils.py
new file mode 100644
index 0000000000..56745a3e5b
--- /dev/null
+++ b/contrib/python/cryptography/py2/_cffi_src/utils.py
@@ -0,0 +1,110 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+import os
+import sys
+from distutils.ccompiler import new_compiler
+from distutils.dist import Distribution
+
+from cffi import FFI
+
+
+# Load the cryptography __about__ to get the current package version
+base_src = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+about = {}
+with open(os.path.join(base_src, "cryptography", "__about__.py")) as f:
+    exec (f.read(), about)
+
+
+def build_ffi_for_binding(
+    module_name,
+    module_prefix,
+    modules,
+    libraries=[],
+    extra_compile_args=[],
+    extra_link_args=[],
+):
+    """
+    Modules listed in ``modules`` should have the following attributes:
+
+    * ``INCLUDES``: A string containing C includes.
+    * ``TYPES``: A string containing C declarations for types.
+    * ``FUNCTIONS``: A string containing C declarations for functions & macros.
+    * ``CUSTOMIZATIONS``: A string containing arbitrary top-level C code, this
+        can be used to do things like test for a define and provide an
+        alternate implementation based on that.
+    """
+    types = []
+    includes = []
+    functions = []
+    customizations = []
+    for name in modules:
+        __import__(module_prefix + name)
+        module = sys.modules[module_prefix + name]
+
+        types.append(module.TYPES)
+        functions.append(module.FUNCTIONS)
+        includes.append(module.INCLUDES)
+        customizations.append(module.CUSTOMIZATIONS)
+
+    verify_source = "\n".join(includes + customizations)
+    ffi = build_ffi(
+        module_name,
+        cdef_source="\n".join(types + functions),
+        verify_source=verify_source,
+        libraries=libraries,
+        extra_compile_args=extra_compile_args,
+        extra_link_args=extra_link_args,
+    )
+
+    return ffi
+
+
+def build_ffi(
+    module_name,
+    cdef_source,
+    verify_source,
+    libraries=[],
+    extra_compile_args=[],
+    extra_link_args=[],
+):
+    ffi = FFI()
+    # Always add the CRYPTOGRAPHY_PACKAGE_VERSION to the shared object
+    cdef_source += "\nstatic const char *const CRYPTOGRAPHY_PACKAGE_VERSION;"
+    verify_source += '\n#define CRYPTOGRAPHY_PACKAGE_VERSION "{}"'.format(
+        about["__version__"]
+    )
+    ffi.cdef(cdef_source)
+    ffi.set_source(
+        module_name,
+        verify_source,
+        libraries=libraries,
+        extra_compile_args=extra_compile_args,
+        extra_link_args=extra_link_args,
+    )
+    return ffi
+
+
+def extra_link_args(compiler_type):
+    if compiler_type == "msvc":
+        # Enable NX and ASLR for Windows builds on MSVC. These are enabled by
+        # default on Python 3.3+ but not on 2.x.
+        return ["/NXCOMPAT", "/DYNAMICBASE"]
+    else:
+        return []
+
+
+def compiler_type():
+    """
+    Gets the compiler type from distutils. On Windows with MSVC it will be
+    "msvc". On macOS and linux it is "unix".
+    """
+    dist = Distribution()
+    dist.parse_config_files()
+    cmd = dist.get_command_obj("build")
+    cmd.ensure_finalized()
+    compiler = new_compiler(compiler=cmd.compiler)
+    return compiler.compiler_type