BoringSSL as optional cryptobackend for ngtcp2

PR добавляет возможность использовать BoringSSL в ngtcp2 в качестве криптобиблиотеки. Для проектов в Аркадии, уже зависящих от ngtcp2, добавлена явная зависимость от слоя абстракции quictls (сейчас в транке ngtcp2 собирается с quictls).
commit_hash:3d6607abecfcff2157859acbdd18f9d0345ac485

1 files changed, 717 insertions, 0 deletions

diff --git a/contrib/restricted/google/boringssl/crypto/fipsmodule/cipher/cipher.c b/contrib/restricted/google/boringssl/crypto/fipsmodule/cipher/cipher.c
new file mode 100644
index 00000000000..0d07fe7d174
--- /dev/null
+++ b/contrib/restricted/google/boringssl/crypto/fipsmodule/cipher/cipher.c
@@ -0,0 +1,717 @@
+/* Copyright (C) 1995-1998 Eric Young ([email protected])
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young ([email protected]).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson ([email protected]).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young ([email protected])"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson ([email protected])"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.] */
+
+#include <contrib/restricted/google/boringssl/include/openssl/cipher.h>
+
+#include <assert.h>
+#include <limits.h>
+#include <string.h>
+
+#include <contrib/restricted/google/boringssl/include/openssl/err.h>
+#include <contrib/restricted/google/boringssl/include/openssl/mem.h>
+#include <contrib/restricted/google/boringssl/include/openssl/nid.h>
+
+#include "internal.h"
+#include "../service_indicator/internal.h"
+#include "../../internal.h"
+
+
+void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx) {
+  OPENSSL_memset(ctx, 0, sizeof(EVP_CIPHER_CTX));
+}
+
+EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void) {
+  EVP_CIPHER_CTX *ctx = OPENSSL_malloc(sizeof(EVP_CIPHER_CTX));
+  if (ctx) {
+    EVP_CIPHER_CTX_init(ctx);
+  }
+  return ctx;
+}
+
+int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *c) {
+  if (c->cipher != NULL && c->cipher->cleanup) {
+    c->cipher->cleanup(c);
+  }
+  OPENSSL_free(c->cipher_data);
+
+  OPENSSL_memset(c, 0, sizeof(EVP_CIPHER_CTX));
+  return 1;
+}
+
+void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx) {
+  if (ctx) {
+    EVP_CIPHER_CTX_cleanup(ctx);
+    OPENSSL_free(ctx);
+  }
+}
+
+int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) {
+  if (in == NULL || in->cipher == NULL) {
+    OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_INPUT_NOT_INITIALIZED);
+    return 0;
+  }
+
+  if (in->poisoned) {
+    OPENSSL_PUT_ERROR(CIPHER, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+    return 0;
+  }
+
+  EVP_CIPHER_CTX_cleanup(out);
+  OPENSSL_memcpy(out, in, sizeof(EVP_CIPHER_CTX));
+
+  if (in->cipher_data && in->cipher->ctx_size) {
+    out->cipher_data = OPENSSL_memdup(in->cipher_data, in->cipher->ctx_size);
+    if (!out->cipher_data) {
+      out->cipher = NULL;
+      return 0;
+    }
+  }
+
+  if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) {
+    if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) {
+      out->cipher = NULL;
+      return 0;
+    }
+  }
+
+  return 1;
+}
+
+int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx) {
+  EVP_CIPHER_CTX_cleanup(ctx);
+  EVP_CIPHER_CTX_init(ctx);
+  return 1;
+}
+
+int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+                      ENGINE *engine, const uint8_t *key, const uint8_t *iv,
+                      int enc) {
+  if (enc == -1) {
+    enc = ctx->encrypt;
+  } else {
+    if (enc) {
+      enc = 1;
+    }
+    ctx->encrypt = enc;
+  }
+
+  if (cipher) {
+    // Ensure a context left from last time is cleared (the previous check
+    // attempted to avoid this if the same ENGINE and EVP_CIPHER could be
+    // used).
+    if (ctx->cipher) {
+      EVP_CIPHER_CTX_cleanup(ctx);
+      // Restore encrypt and flags
+      ctx->encrypt = enc;
+    }
+
+    ctx->cipher = cipher;
+    if (ctx->cipher->ctx_size) {
+      ctx->cipher_data = OPENSSL_malloc(ctx->cipher->ctx_size);
+      if (!ctx->cipher_data) {
+        ctx->cipher = NULL;
+        return 0;
+      }
+    } else {
+      ctx->cipher_data = NULL;
+    }
+
+    ctx->key_len = cipher->key_len;
+    ctx->flags = 0;
+
+    if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
+      if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) {
+        ctx->cipher = NULL;
+        OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_INITIALIZATION_ERROR);
+        return 0;
+      }
+    }
+  } else if (!ctx->cipher) {
+    OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_NO_CIPHER_SET);
+    return 0;
+  }
+
+  // we assume block size is a power of 2 in *cryptUpdate
+  assert(ctx->cipher->block_size == 1 || ctx->cipher->block_size == 8 ||
+         ctx->cipher->block_size == 16);
+
+  if (!(EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
+    switch (EVP_CIPHER_CTX_mode(ctx)) {
+      case EVP_CIPH_STREAM_CIPHER:
+      case EVP_CIPH_ECB_MODE:
+        break;
+
+      case EVP_CIPH_CFB_MODE:
+        ctx->num = 0;
+        OPENSSL_FALLTHROUGH;
+
+      case EVP_CIPH_CBC_MODE:
+        assert(EVP_CIPHER_CTX_iv_length(ctx) <= sizeof(ctx->iv));
+        if (iv) {
+          OPENSSL_memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx));
+        }
+        OPENSSL_memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx));
+        break;
+
+      case EVP_CIPH_CTR_MODE:
+      case EVP_CIPH_OFB_MODE:
+        ctx->num = 0;
+        // Don't reuse IV for CTR mode
+        if (iv) {
+          OPENSSL_memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx));
+        }
+        break;
+
+      default:
+        return 0;
+    }
+  }
+
+  if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
+    if (!ctx->cipher->init(ctx, key, iv, enc)) {
+      return 0;
+    }
+  }
+
+  ctx->buf_len = 0;
+  ctx->final_used = 0;
+  // Clear the poisoned flag to permit re-use of a CTX that previously had a
+  // failed operation.
+  ctx->poisoned = 0;
+  return 1;
+}
+
+int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+                       ENGINE *impl, const uint8_t *key, const uint8_t *iv) {
+  return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
+}
+
+int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+                       ENGINE *impl, const uint8_t *key, const uint8_t *iv) {
+  return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
+}
+
+// block_remainder returns the number of bytes to remove from |len| to get a
+// multiple of |ctx|'s block size.
+static int block_remainder(const EVP_CIPHER_CTX *ctx, int len) {
+  // |block_size| must be a power of two.
+  assert(ctx->cipher->block_size != 0);
+  assert((ctx->cipher->block_size & (ctx->cipher->block_size - 1)) == 0);
+  return len & (ctx->cipher->block_size - 1);
+}
+
+int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, uint8_t *out, int *out_len,
+                      const uint8_t *in, int in_len) {
+  if (ctx->poisoned) {
+    OPENSSL_PUT_ERROR(CIPHER, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+    return 0;
+  }
+  // If the first call to |cipher| succeeds and the second fails, |ctx| may be
+  // left in an indeterminate state. We set a poison flag on failure to ensure
+  // callers do not continue to use the object in that case.
+  ctx->poisoned = 1;
+
+  // Ciphers that use blocks may write up to |bl| extra bytes. Ensure the output
+  // does not overflow |*out_len|.
+  int bl = ctx->cipher->block_size;
+  if (bl > 1 && in_len > INT_MAX - bl) {
+    OPENSSL_PUT_ERROR(CIPHER, ERR_R_OVERFLOW);
+    return 0;
+  }
+
+  if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
+    int ret = ctx->cipher->cipher(ctx, out, in, in_len);
+    if (ret < 0) {
+      return 0;
+    } else {
+      *out_len = ret;
+    }
+    ctx->poisoned = 0;
+    return 1;
+  }
+
+  if (in_len <= 0) {
+    *out_len = 0;
+    if (in_len == 0) {
+      ctx->poisoned = 0;
+      return 1;
+    }
+    return 0;
+  }
+
+  if (ctx->buf_len == 0 && block_remainder(ctx, in_len) == 0) {
+    if (ctx->cipher->cipher(ctx, out, in, in_len)) {
+      *out_len = in_len;
+      ctx->poisoned = 0;
+      return 1;
+    } else {
+      *out_len = 0;
+      return 0;
+    }
+  }
+
+  int i = ctx->buf_len;
+  assert(bl <= (int)sizeof(ctx->buf));
+  if (i != 0) {
+    if (bl - i > in_len) {
+      OPENSSL_memcpy(&ctx->buf[i], in, in_len);
+      ctx->buf_len += in_len;
+      *out_len = 0;
+      ctx->poisoned = 0;
+      return 1;
+    } else {
+      int j = bl - i;
+      OPENSSL_memcpy(&ctx->buf[i], in, j);
+      if (!ctx->cipher->cipher(ctx, out, ctx->buf, bl)) {
+        return 0;
+      }
+      in_len -= j;
+      in += j;
+      out += bl;
+      *out_len = bl;
+    }
+  } else {
+    *out_len = 0;
+  }
+
+  i = block_remainder(ctx, in_len);
+  in_len -= i;
+  if (in_len > 0) {
+    if (!ctx->cipher->cipher(ctx, out, in, in_len)) {
+      return 0;
+    }
+    *out_len += in_len;
+  }
+
+  if (i != 0) {
+    OPENSSL_memcpy(ctx->buf, &in[in_len], i);
+  }
+  ctx->buf_len = i;
+  ctx->poisoned = 0;
+  return 1;
+}
+
+int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, uint8_t *out, int *out_len) {
+  int n;
+  unsigned int i, b, bl;
+
+  if (ctx->poisoned) {
+    OPENSSL_PUT_ERROR(CIPHER, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+    return 0;
+  }
+
+  if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
+    // When EVP_CIPH_FLAG_CUSTOM_CIPHER is set, the return value of |cipher| is
+    // the number of bytes written, or -1 on error. Otherwise the return value
+    // is one on success and zero on error.
+    const int num_bytes = ctx->cipher->cipher(ctx, out, NULL, 0);
+    if (num_bytes < 0) {
+      return 0;
+    }
+    *out_len = num_bytes;
+    goto out;
+  }
+
+  b = ctx->cipher->block_size;
+  assert(b <= sizeof(ctx->buf));
+  if (b == 1) {
+    *out_len = 0;
+    goto out;
+  }
+
+  bl = ctx->buf_len;
+  if (ctx->flags & EVP_CIPH_NO_PADDING) {
+    if (bl) {
+      OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
+      return 0;
+    }
+    *out_len = 0;
+    goto out;
+  }
+
+  n = b - bl;
+  for (i = bl; i < b; i++) {
+    ctx->buf[i] = n;
+  }
+  if (!ctx->cipher->cipher(ctx, out, ctx->buf, b)) {
+    return 0;
+  }
+  *out_len = b;
+
+out:
+  EVP_Cipher_verify_service_indicator(ctx);
+  return 1;
+}
+
+int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, uint8_t *out, int *out_len,
+                      const uint8_t *in, int in_len) {
+  if (ctx->poisoned) {
+    OPENSSL_PUT_ERROR(CIPHER, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+    return 0;
+  }
+
+  // Ciphers that use blocks may write up to |bl| extra bytes. Ensure the output
+  // does not overflow |*out_len|.
+  unsigned int b = ctx->cipher->block_size;
+  if (b > 1 && in_len > INT_MAX - (int)b) {
+    OPENSSL_PUT_ERROR(CIPHER, ERR_R_OVERFLOW);
+    return 0;
+  }
+
+  if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
+    int r = ctx->cipher->cipher(ctx, out, in, in_len);
+    if (r < 0) {
+      *out_len = 0;
+      return 0;
+    } else {
+      *out_len = r;
+    }
+    return 1;
+  }
+
+  if (in_len <= 0) {
+    *out_len = 0;
+    return in_len == 0;
+  }
+
+  if (ctx->flags & EVP_CIPH_NO_PADDING) {
+    return EVP_EncryptUpdate(ctx, out, out_len, in, in_len);
+  }
+
+  assert(b <= sizeof(ctx->final));
+  int fix_len = 0;
+  if (ctx->final_used) {
+    OPENSSL_memcpy(out, ctx->final, b);
+    out += b;
+    fix_len = 1;
+  }
+
+  if (!EVP_EncryptUpdate(ctx, out, out_len, in, in_len)) {
+    return 0;
+  }
+
+  // if we have 'decrypted' a multiple of block size, make sure
+  // we have a copy of this last block
+  if (b > 1 && !ctx->buf_len) {
+    *out_len -= b;
+    ctx->final_used = 1;
+    OPENSSL_memcpy(ctx->final, &out[*out_len], b);
+  } else {
+    ctx->final_used = 0;
+  }
+
+  if (fix_len) {
+    *out_len += b;
+  }
+
+  return 1;
+}
+
+int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *out_len) {
+  int i, n;
+  unsigned int b;
+  *out_len = 0;
+
+  if (ctx->poisoned) {
+    OPENSSL_PUT_ERROR(CIPHER, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+    return 0;
+  }
+
+  if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
+    i = ctx->cipher->cipher(ctx, out, NULL, 0);
+    if (i < 0) {
+      return 0;
+    } else {
+      *out_len = i;
+    }
+    goto out;
+  }
+
+  b = ctx->cipher->block_size;
+  if (ctx->flags & EVP_CIPH_NO_PADDING) {
+    if (ctx->buf_len) {
+      OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
+      return 0;
+    }
+    *out_len = 0;
+    goto out;
+  }
+
+  if (b > 1) {
+    if (ctx->buf_len || !ctx->final_used) {
+      OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_WRONG_FINAL_BLOCK_LENGTH);
+      return 0;
+    }
+    assert(b <= sizeof(ctx->final));
+
+    // The following assumes that the ciphertext has been authenticated.
+    // Otherwise it provides a padding oracle.
+    n = ctx->final[b - 1];
+    if (n == 0 || n > (int)b) {
+      OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BAD_DECRYPT);
+      return 0;
+    }
+
+    for (i = 0; i < n; i++) {
+      if (ctx->final[--b] != n) {
+        OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BAD_DECRYPT);
+        return 0;
+      }
+    }
+
+    n = ctx->cipher->block_size - n;
+    for (i = 0; i < n; i++) {
+      out[i] = ctx->final[i];
+    }
+    *out_len = n;
+  } else {
+    *out_len = 0;
+  }
+
+out:
+  EVP_Cipher_verify_service_indicator(ctx);
+  return 1;
+}
+
+int EVP_Cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in,
+               size_t in_len) {
+  const int ret = ctx->cipher->cipher(ctx, out, in, in_len);
+
+  // |EVP_CIPH_FLAG_CUSTOM_CIPHER| never sets the FIPS indicator via
+  // |EVP_Cipher| because it's complicated whether the operation has completed
+  // or not. E.g. AES-GCM with a non-NULL |in| argument hasn't completed an
+  // operation. Callers should use the |EVP_AEAD| API or, at least,
+  // |EVP_CipherUpdate| etc.
+  //
+  // This call can't be pushed into |EVP_Cipher_verify_service_indicator|
+  // because whether |ret| indicates success or not depends on whether
+  // |EVP_CIPH_FLAG_CUSTOM_CIPHER| is set. (This unreasonable, but matches
+  // OpenSSL.)
+  if (!(ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) && ret) {
+    EVP_Cipher_verify_service_indicator(ctx);
+  }
+
+  return ret;
+}
+
+int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, uint8_t *out, int *out_len,
+                     const uint8_t *in, int in_len) {
+  if (ctx->encrypt) {
+    return EVP_EncryptUpdate(ctx, out, out_len, in, in_len);
+  } else {
+    return EVP_DecryptUpdate(ctx, out, out_len, in, in_len);
+  }
+}
+
+int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, uint8_t *out, int *out_len) {
+  if (ctx->encrypt) {
+    return EVP_EncryptFinal_ex(ctx, out, out_len);
+  } else {
+    return EVP_DecryptFinal_ex(ctx, out, out_len);
+  }
+}
+
+const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx) {
+  return ctx->cipher;
+}
+
+int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx) {
+  return ctx->cipher->nid;
+}
+
+int EVP_CIPHER_CTX_encrypting(const EVP_CIPHER_CTX *ctx) {
+  return ctx->encrypt;
+}
+
+unsigned EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx) {
+  return ctx->cipher->block_size;
+}
+
+unsigned EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx) {
+  return ctx->key_len;
+}
+
+unsigned EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx) {
+  if (EVP_CIPHER_mode(ctx->cipher) == EVP_CIPH_GCM_MODE) {
+    int length;
+    int res = EVP_CIPHER_CTX_ctrl((EVP_CIPHER_CTX *)ctx, EVP_CTRL_GET_IVLEN, 0,
+                                  &length);
+    // EVP_CIPHER_CTX_ctrl returning an error should be impossible under this
+    // circumstance. If it somehow did, fallback to the static cipher iv_len.
+    if (res == 1) {
+      return length;
+    }
+  }
+  return ctx->cipher->iv_len;
+}
+
+void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx) {
+  return ctx->app_data;
+}
+
+void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data) {
+  ctx->app_data = data;
+}
+
+uint32_t EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx) {
+  return ctx->cipher->flags & ~EVP_CIPH_MODE_MASK;
+}
+
+uint32_t EVP_CIPHER_CTX_mode(const EVP_CIPHER_CTX *ctx) {
+  return ctx->cipher->flags & EVP_CIPH_MODE_MASK;
+}
+
+int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int command, int arg, void *ptr) {
+  int ret;
+  if (!ctx->cipher) {
+    OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_NO_CIPHER_SET);
+    return 0;
+  }
+
+  if (!ctx->cipher->ctrl) {
+    OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_CTRL_NOT_IMPLEMENTED);
+    return 0;
+  }
+
+  ret = ctx->cipher->ctrl(ctx, command, arg, ptr);
+  if (ret == -1) {
+    OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_CTRL_OPERATION_NOT_IMPLEMENTED);
+    return 0;
+  }
+
+  return ret;
+}
+
+int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) {
+  if (pad) {
+    ctx->flags &= ~EVP_CIPH_NO_PADDING;
+  } else {
+    ctx->flags |= EVP_CIPH_NO_PADDING;
+  }
+  return 1;
+}
+
+int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, unsigned key_len) {
+  if (c->key_len == key_len) {
+    return 1;
+  }
+
+  if (key_len == 0 || !(c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
+    OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_INVALID_KEY_LENGTH);
+    return 0;
+  }
+
+  c->key_len = key_len;
+  return 1;
+}
+
+int EVP_CIPHER_nid(const EVP_CIPHER *cipher) { return cipher->nid; }
+
+unsigned EVP_CIPHER_block_size(const EVP_CIPHER *cipher) {
+  return cipher->block_size;
+}
+
+unsigned EVP_CIPHER_key_length(const EVP_CIPHER *cipher) {
+  return cipher->key_len;
+}
+
+unsigned EVP_CIPHER_iv_length(const EVP_CIPHER *cipher) {
+  return cipher->iv_len;
+}
+
+uint32_t EVP_CIPHER_flags(const EVP_CIPHER *cipher) {
+  return cipher->flags & ~EVP_CIPH_MODE_MASK;
+}
+
+uint32_t EVP_CIPHER_mode(const EVP_CIPHER *cipher) {
+  return cipher->flags & EVP_CIPH_MODE_MASK;
+}
+
+int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+                   const uint8_t *key, const uint8_t *iv, int enc) {
+  if (cipher) {
+    EVP_CIPHER_CTX_init(ctx);
+  }
+  return EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, enc);
+}
+
+int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+                    const uint8_t *key, const uint8_t *iv) {
+  return EVP_CipherInit(ctx, cipher, key, iv, 1);
+}
+
+int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+                    const uint8_t *key, const uint8_t *iv) {
+  return EVP_CipherInit(ctx, cipher, key, iv, 0);
+}
+
+int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, uint8_t *out, int *out_len) {
+  return EVP_CipherFinal_ex(ctx, out, out_len);
+}
+
+int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, uint8_t *out, int *out_len) {
+  return EVP_EncryptFinal_ex(ctx, out, out_len);
+}
+
+int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, uint8_t *out, int *out_len) {
+  return EVP_DecryptFinal_ex(ctx, out, out_len);
+}
+
+int EVP_add_cipher_alias(const char *a, const char *b) {
+  return 1;
+}
+
+void EVP_CIPHER_CTX_set_flags(const EVP_CIPHER_CTX *ctx, uint32_t flags) {}