intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 886 insertions, 0 deletions

diff --git a/contrib/libs/openssl/crypto/pem/pvkfmt.c b/contrib/libs/openssl/crypto/pem/pvkfmt.c
new file mode 100644
index 0000000000..a933b7c181
--- /dev/null
+++ b/contrib/libs/openssl/crypto/pem/pvkfmt.c
@@ -0,0 +1,886 @@
+/*
+ * Copyright 2005-2020 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/*
+ * Support for PVK format keys and related structures (such a PUBLICKEYBLOB
+ * and PRIVATEKEYBLOB).
+ */
+
+#include "internal/cryptlib.h"
+#include <openssl/pem.h>
+#include <openssl/rand.h>
+#include <openssl/bn.h>
+#if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA)
+# include <openssl/dsa.h>
+# include <openssl/rsa.h>
+
+/*
+ * Utility function: read a DWORD (4 byte unsigned integer) in little endian
+ * format
+ */
+
+static unsigned int read_ledword(const unsigned char **in)
+{
+    const unsigned char *p = *in;
+    unsigned int ret;
+    ret = (unsigned int)*p++;
+    ret |= (unsigned int)*p++ << 8;
+    ret |= (unsigned int)*p++ << 16;
+    ret |= (unsigned int)*p++ << 24;
+    *in = p;
+    return ret;
+}
+
+/*
+ * Read a BIGNUM in little endian format. The docs say that this should take
+ * up bitlen/8 bytes.
+ */
+
+static int read_lebn(const unsigned char **in, unsigned int nbyte, BIGNUM **r)
+{
+    *r = BN_lebin2bn(*in, nbyte, NULL);
+    if (*r == NULL)
+        return 0;
+    *in += nbyte;
+    return 1;
+}
+
+/* Convert private key blob to EVP_PKEY: RSA and DSA keys supported */
+
+# define MS_PUBLICKEYBLOB        0x6
+# define MS_PRIVATEKEYBLOB       0x7
+# define MS_RSA1MAGIC            0x31415352L
+# define MS_RSA2MAGIC            0x32415352L
+# define MS_DSS1MAGIC            0x31535344L
+# define MS_DSS2MAGIC            0x32535344L
+
+# define MS_KEYALG_RSA_KEYX      0xa400
+# define MS_KEYALG_DSS_SIGN      0x2200
+
+# define MS_KEYTYPE_KEYX         0x1
+# define MS_KEYTYPE_SIGN         0x2
+
+/* Maximum length of a blob after header */
+# define BLOB_MAX_LENGTH          102400
+
+/* The PVK file magic number: seems to spell out "bobsfile", who is Bob? */
+# define MS_PVKMAGIC             0xb0b5f11eL
+/* Salt length for PVK files */
+# define PVK_SALTLEN             0x10
+/* Maximum length in PVK header */
+# define PVK_MAX_KEYLEN          102400
+/* Maximum salt length */
+# define PVK_MAX_SALTLEN         10240
+
+static EVP_PKEY *b2i_rsa(const unsigned char **in,
+                         unsigned int bitlen, int ispub);
+static EVP_PKEY *b2i_dss(const unsigned char **in,
+                         unsigned int bitlen, int ispub);
+
+static int do_blob_header(const unsigned char **in, unsigned int length,
+                          unsigned int *pmagic, unsigned int *pbitlen,
+                          int *pisdss, int *pispub)
+{
+    const unsigned char *p = *in;
+    if (length < 16)
+        return 0;
+    /* bType */
+    if (*p == MS_PUBLICKEYBLOB) {
+        if (*pispub == 0) {
+            PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
+            return 0;
+        }
+        *pispub = 1;
+    } else if (*p == MS_PRIVATEKEYBLOB) {
+        if (*pispub == 1) {
+            PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
+            return 0;
+        }
+        *pispub = 0;
+    } else
+        return 0;
+    p++;
+    /* Version */
+    if (*p++ != 0x2) {
+        PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_VERSION_NUMBER);
+        return 0;
+    }
+    /* Ignore reserved, aiKeyAlg */
+    p += 6;
+    *pmagic = read_ledword(&p);
+    *pbitlen = read_ledword(&p);
+    *pisdss = 0;
+    switch (*pmagic) {
+
+    case MS_DSS1MAGIC:
+        *pisdss = 1;
+        /* fall thru */
+    case MS_RSA1MAGIC:
+        if (*pispub == 0) {
+            PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
+            return 0;
+        }
+        break;
+
+    case MS_DSS2MAGIC:
+        *pisdss = 1;
+        /* fall thru */
+    case MS_RSA2MAGIC:
+        if (*pispub == 1) {
+            PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
+            return 0;
+        }
+        break;
+
+    default:
+        PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_MAGIC_NUMBER);
+        return -1;
+    }
+    *in = p;
+    return 1;
+}
+
+static unsigned int blob_length(unsigned bitlen, int isdss, int ispub)
+{
+    unsigned int nbyte, hnbyte;
+    nbyte = (bitlen + 7) >> 3;
+    hnbyte = (bitlen + 15) >> 4;
+    if (isdss) {
+
+        /*
+         * Expected length: 20 for q + 3 components bitlen each + 24 for seed
+         * structure.
+         */
+        if (ispub)
+            return 44 + 3 * nbyte;
+        /*
+         * Expected length: 20 for q, priv, 2 bitlen components + 24 for seed
+         * structure.
+         */
+        else
+            return 64 + 2 * nbyte;
+    } else {
+        /* Expected length: 4 for 'e' + 'n' */
+        if (ispub)
+            return 4 + nbyte;
+        else
+            /*
+             * Expected length: 4 for 'e' and 7 other components. 2
+             * components are bitlen size, 5 are bitlen/2
+             */
+            return 4 + 2 * nbyte + 5 * hnbyte;
+    }
+
+}
+
+static EVP_PKEY *do_b2i(const unsigned char **in, unsigned int length,
+                        int ispub)
+{
+    const unsigned char *p = *in;
+    unsigned int bitlen, magic;
+    int isdss;
+    if (do_blob_header(&p, length, &magic, &bitlen, &isdss, &ispub) <= 0) {
+        PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_HEADER_PARSE_ERROR);
+        return NULL;
+    }
+    length -= 16;
+    if (length < blob_length(bitlen, isdss, ispub)) {
+        PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_TOO_SHORT);
+        return NULL;
+    }
+    if (isdss)
+        return b2i_dss(&p, bitlen, ispub);
+    else
+        return b2i_rsa(&p, bitlen, ispub);
+}
+
+static EVP_PKEY *do_b2i_bio(BIO *in, int ispub)
+{
+    const unsigned char *p;
+    unsigned char hdr_buf[16], *buf = NULL;
+    unsigned int bitlen, magic, length;
+    int isdss;
+    EVP_PKEY *ret = NULL;
+    if (BIO_read(in, hdr_buf, 16) != 16) {
+        PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
+        return NULL;
+    }
+    p = hdr_buf;
+    if (do_blob_header(&p, 16, &magic, &bitlen, &isdss, &ispub) <= 0)
+        return NULL;
+
+    length = blob_length(bitlen, isdss, ispub);
+    if (length > BLOB_MAX_LENGTH) {
+        PEMerr(PEM_F_DO_B2I_BIO, PEM_R_HEADER_TOO_LONG);
+        return NULL;
+    }
+    buf = OPENSSL_malloc(length);
+    if (buf == NULL) {
+        PEMerr(PEM_F_DO_B2I_BIO, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
+    p = buf;
+    if (BIO_read(in, buf, length) != (int)length) {
+        PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
+        goto err;
+    }
+
+    if (isdss)
+        ret = b2i_dss(&p, bitlen, ispub);
+    else
+        ret = b2i_rsa(&p, bitlen, ispub);
+
+ err:
+    OPENSSL_free(buf);
+    return ret;
+}
+
+static EVP_PKEY *b2i_dss(const unsigned char **in,
+                         unsigned int bitlen, int ispub)
+{
+    const unsigned char *p = *in;
+    EVP_PKEY *ret = NULL;
+    DSA *dsa = NULL;
+    BN_CTX *ctx = NULL;
+    unsigned int nbyte;
+    BIGNUM *pbn = NULL, *qbn = NULL, *gbn = NULL, *priv_key = NULL;
+    BIGNUM *pub_key = NULL;
+
+    nbyte = (bitlen + 7) >> 3;
+
+    dsa = DSA_new();
+    ret = EVP_PKEY_new();
+    if (dsa == NULL || ret == NULL)
+        goto memerr;
+    if (!read_lebn(&p, nbyte, &pbn))
+        goto memerr;
+
+    if (!read_lebn(&p, 20, &qbn))
+        goto memerr;
+
+    if (!read_lebn(&p, nbyte, &gbn))
+        goto memerr;
+
+    if (ispub) {
+        if (!read_lebn(&p, nbyte, &pub_key))
+            goto memerr;
+    } else {
+        if (!read_lebn(&p, 20, &priv_key))
+            goto memerr;
+
+        /* Set constant time flag before public key calculation */
+        BN_set_flags(priv_key, BN_FLG_CONSTTIME);
+
+        /* Calculate public key */
+        pub_key = BN_new();
+        if (pub_key == NULL)
+            goto memerr;
+        if ((ctx = BN_CTX_new()) == NULL)
+            goto memerr;
+
+        if (!BN_mod_exp(pub_key, gbn, priv_key, pbn, ctx))
+            goto memerr;
+
+        BN_CTX_free(ctx);
+        ctx = NULL;
+    }
+    if (!DSA_set0_pqg(dsa, pbn, qbn, gbn))
+        goto memerr;
+    pbn = qbn = gbn = NULL;
+    if (!DSA_set0_key(dsa, pub_key, priv_key))
+        goto memerr;
+    pub_key = priv_key = NULL;
+
+    if (!EVP_PKEY_set1_DSA(ret, dsa))
+        goto memerr;
+    DSA_free(dsa);
+    *in = p;
+    return ret;
+
+ memerr:
+    PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE);
+    DSA_free(dsa);
+    BN_free(pbn);
+    BN_free(qbn);
+    BN_free(gbn);
+    BN_free(pub_key);
+    BN_free(priv_key);
+    EVP_PKEY_free(ret);
+    BN_CTX_free(ctx);
+    return NULL;
+}
+
+static EVP_PKEY *b2i_rsa(const unsigned char **in,
+                         unsigned int bitlen, int ispub)
+{
+    const unsigned char *pin = *in;
+    EVP_PKEY *ret = NULL;
+    BIGNUM *e = NULL, *n = NULL, *d = NULL;
+    BIGNUM *p = NULL, *q = NULL, *dmp1 = NULL, *dmq1 = NULL, *iqmp = NULL;
+    RSA *rsa = NULL;
+    unsigned int nbyte, hnbyte;
+    nbyte = (bitlen + 7) >> 3;
+    hnbyte = (bitlen + 15) >> 4;
+    rsa = RSA_new();
+    ret = EVP_PKEY_new();
+    if (rsa == NULL || ret == NULL)
+        goto memerr;
+    e = BN_new();
+    if (e == NULL)
+        goto memerr;
+    if (!BN_set_word(e, read_ledword(&pin)))
+        goto memerr;
+    if (!read_lebn(&pin, nbyte, &n))
+        goto memerr;
+    if (!ispub) {
+        if (!read_lebn(&pin, hnbyte, &p))
+            goto memerr;
+        if (!read_lebn(&pin, hnbyte, &q))
+            goto memerr;
+        if (!read_lebn(&pin, hnbyte, &dmp1))
+            goto memerr;
+        if (!read_lebn(&pin, hnbyte, &dmq1))
+            goto memerr;
+        if (!read_lebn(&pin, hnbyte, &iqmp))
+            goto memerr;
+        if (!read_lebn(&pin, nbyte, &d))
+            goto memerr;
+        if (!RSA_set0_factors(rsa, p, q))
+            goto memerr;
+        p = q = NULL;
+        if (!RSA_set0_crt_params(rsa, dmp1, dmq1, iqmp))
+            goto memerr;
+        dmp1 = dmq1 = iqmp = NULL;
+    }
+    if (!RSA_set0_key(rsa, n, e, d))
+        goto memerr;
+    n = e = d = NULL;
+
+    if (!EVP_PKEY_set1_RSA(ret, rsa))
+        goto memerr;
+    RSA_free(rsa);
+    *in = pin;
+    return ret;
+ memerr:
+    PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE);
+    BN_free(e);
+    BN_free(n);
+    BN_free(p);
+    BN_free(q);
+    BN_free(dmp1);
+    BN_free(dmq1);
+    BN_free(iqmp);
+    BN_free(d);
+    RSA_free(rsa);
+    EVP_PKEY_free(ret);
+    return NULL;
+}
+
+EVP_PKEY *b2i_PrivateKey(const unsigned char **in, long length)
+{
+    return do_b2i(in, length, 0);
+}
+
+EVP_PKEY *b2i_PublicKey(const unsigned char **in, long length)
+{
+    return do_b2i(in, length, 1);
+}
+
+EVP_PKEY *b2i_PrivateKey_bio(BIO *in)
+{
+    return do_b2i_bio(in, 0);
+}
+
+EVP_PKEY *b2i_PublicKey_bio(BIO *in)
+{
+    return do_b2i_bio(in, 1);
+}
+
+static void write_ledword(unsigned char **out, unsigned int dw)
+{
+    unsigned char *p = *out;
+    *p++ = dw & 0xff;
+    *p++ = (dw >> 8) & 0xff;
+    *p++ = (dw >> 16) & 0xff;
+    *p++ = (dw >> 24) & 0xff;
+    *out = p;
+}
+
+static void write_lebn(unsigned char **out, const BIGNUM *bn, int len)
+{
+    BN_bn2lebinpad(bn, *out, len);
+    *out += len;
+}
+
+static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *magic);
+static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *magic);
+
+static void write_rsa(unsigned char **out, RSA *rsa, int ispub);
+static void write_dsa(unsigned char **out, DSA *dsa, int ispub);
+
+static int do_i2b(unsigned char **out, EVP_PKEY *pk, int ispub)
+{
+    unsigned char *p;
+    unsigned int bitlen, magic = 0, keyalg;
+    int outlen, noinc = 0;
+    int pktype = EVP_PKEY_id(pk);
+    if (pktype == EVP_PKEY_DSA) {
+        bitlen = check_bitlen_dsa(EVP_PKEY_get0_DSA(pk), ispub, &magic);
+        keyalg = MS_KEYALG_DSS_SIGN;
+    } else if (pktype == EVP_PKEY_RSA) {
+        bitlen = check_bitlen_rsa(EVP_PKEY_get0_RSA(pk), ispub, &magic);
+        keyalg = MS_KEYALG_RSA_KEYX;
+    } else
+        return -1;
+    if (bitlen == 0)
+        return -1;
+    outlen = 16 + blob_length(bitlen,
+                              keyalg == MS_KEYALG_DSS_SIGN ? 1 : 0, ispub);
+    if (out == NULL)
+        return outlen;
+    if (*out)
+        p = *out;
+    else {
+        if ((p = OPENSSL_malloc(outlen)) == NULL) {
+            PEMerr(PEM_F_DO_I2B, ERR_R_MALLOC_FAILURE);
+            return -1;
+        }
+        *out = p;
+        noinc = 1;
+    }
+    if (ispub)
+        *p++ = MS_PUBLICKEYBLOB;
+    else
+        *p++ = MS_PRIVATEKEYBLOB;
+    *p++ = 0x2;
+    *p++ = 0;
+    *p++ = 0;
+    write_ledword(&p, keyalg);
+    write_ledword(&p, magic);
+    write_ledword(&p, bitlen);
+    if (keyalg == MS_KEYALG_DSS_SIGN)
+        write_dsa(&p, EVP_PKEY_get0_DSA(pk), ispub);
+    else
+        write_rsa(&p, EVP_PKEY_get0_RSA(pk), ispub);
+    if (!noinc)
+        *out += outlen;
+    return outlen;
+}
+
+static int do_i2b_bio(BIO *out, EVP_PKEY *pk, int ispub)
+{
+    unsigned char *tmp = NULL;
+    int outlen, wrlen;
+    outlen = do_i2b(&tmp, pk, ispub);
+    if (outlen < 0)
+        return -1;
+    wrlen = BIO_write(out, tmp, outlen);
+    OPENSSL_free(tmp);
+    if (wrlen == outlen)
+        return outlen;
+    return -1;
+}
+
+static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *pmagic)
+{
+    int bitlen;
+    const BIGNUM *p = NULL, *q = NULL, *g = NULL;
+    const BIGNUM *pub_key = NULL, *priv_key = NULL;
+
+    DSA_get0_pqg(dsa, &p, &q, &g);
+    DSA_get0_key(dsa, &pub_key, &priv_key);
+    bitlen = BN_num_bits(p);
+    if ((bitlen & 7) || (BN_num_bits(q) != 160)
+        || (BN_num_bits(g) > bitlen))
+        goto badkey;
+    if (ispub) {
+        if (BN_num_bits(pub_key) > bitlen)
+            goto badkey;
+        *pmagic = MS_DSS1MAGIC;
+    } else {
+        if (BN_num_bits(priv_key) > 160)
+            goto badkey;
+        *pmagic = MS_DSS2MAGIC;
+    }
+
+    return bitlen;
+ badkey:
+    PEMerr(PEM_F_CHECK_BITLEN_DSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
+    return 0;
+}
+
+static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *pmagic)
+{
+    int nbyte, hnbyte, bitlen;
+    const BIGNUM *e;
+
+    RSA_get0_key(rsa, NULL, &e, NULL);
+    if (BN_num_bits(e) > 32)
+        goto badkey;
+    bitlen = RSA_bits(rsa);
+    nbyte = RSA_size(rsa);
+    hnbyte = (bitlen + 15) >> 4;
+    if (ispub) {
+        *pmagic = MS_RSA1MAGIC;
+        return bitlen;
+    } else {
+        const BIGNUM *d, *p, *q, *iqmp, *dmp1, *dmq1;
+
+        *pmagic = MS_RSA2MAGIC;
+
+        /*
+         * For private key each component must fit within nbyte or hnbyte.
+         */
+        RSA_get0_key(rsa, NULL, NULL, &d);
+        if (BN_num_bytes(d) > nbyte)
+            goto badkey;
+        RSA_get0_factors(rsa, &p, &q);
+        RSA_get0_crt_params(rsa, &dmp1, &dmq1, &iqmp);
+        if ((BN_num_bytes(iqmp) > hnbyte)
+            || (BN_num_bytes(p) > hnbyte)
+            || (BN_num_bytes(q) > hnbyte)
+            || (BN_num_bytes(dmp1) > hnbyte)
+            || (BN_num_bytes(dmq1) > hnbyte))
+            goto badkey;
+    }
+    return bitlen;
+ badkey:
+    PEMerr(PEM_F_CHECK_BITLEN_RSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
+    return 0;
+}
+
+static void write_rsa(unsigned char **out, RSA *rsa, int ispub)
+{
+    int nbyte, hnbyte;
+    const BIGNUM *n, *d, *e, *p, *q, *iqmp, *dmp1, *dmq1;
+
+    nbyte = RSA_size(rsa);
+    hnbyte = (RSA_bits(rsa) + 15) >> 4;
+    RSA_get0_key(rsa, &n, &e, &d);
+    write_lebn(out, e, 4);
+    write_lebn(out, n, nbyte);
+    if (ispub)
+        return;
+    RSA_get0_factors(rsa, &p, &q);
+    RSA_get0_crt_params(rsa, &dmp1, &dmq1, &iqmp);
+    write_lebn(out, p, hnbyte);
+    write_lebn(out, q, hnbyte);
+    write_lebn(out, dmp1, hnbyte);
+    write_lebn(out, dmq1, hnbyte);
+    write_lebn(out, iqmp, hnbyte);
+    write_lebn(out, d, nbyte);
+}
+
+static void write_dsa(unsigned char **out, DSA *dsa, int ispub)
+{
+    int nbyte;
+    const BIGNUM *p = NULL, *q = NULL, *g = NULL;
+    const BIGNUM *pub_key = NULL, *priv_key = NULL;
+
+    DSA_get0_pqg(dsa, &p, &q, &g);
+    DSA_get0_key(dsa, &pub_key, &priv_key);
+    nbyte = BN_num_bytes(p);
+    write_lebn(out, p, nbyte);
+    write_lebn(out, q, 20);
+    write_lebn(out, g, nbyte);
+    if (ispub)
+        write_lebn(out, pub_key, nbyte);
+    else
+        write_lebn(out, priv_key, 20);
+    /* Set "invalid" for seed structure values */
+    memset(*out, 0xff, 24);
+    *out += 24;
+    return;
+}
+
+int i2b_PrivateKey_bio(BIO *out, EVP_PKEY *pk)
+{
+    return do_i2b_bio(out, pk, 0);
+}
+
+int i2b_PublicKey_bio(BIO *out, EVP_PKEY *pk)
+{
+    return do_i2b_bio(out, pk, 1);
+}
+
+# ifndef OPENSSL_NO_RC4
+
+static int do_PVK_header(const unsigned char **in, unsigned int length,
+                         int skip_magic,
+                         unsigned int *psaltlen, unsigned int *pkeylen)
+{
+    const unsigned char *p = *in;
+    unsigned int pvk_magic, is_encrypted;
+    if (skip_magic) {
+        if (length < 20) {
+            PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
+            return 0;
+        }
+    } else {
+        if (length < 24) {
+            PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
+            return 0;
+        }
+        pvk_magic = read_ledword(&p);
+        if (pvk_magic != MS_PVKMAGIC) {
+            PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_BAD_MAGIC_NUMBER);
+            return 0;
+        }
+    }
+    /* Skip reserved */
+    p += 4;
+    /*
+     * keytype =
+     */ read_ledword(&p);
+    is_encrypted = read_ledword(&p);
+    *psaltlen = read_ledword(&p);
+    *pkeylen = read_ledword(&p);
+
+    if (*pkeylen > PVK_MAX_KEYLEN || *psaltlen > PVK_MAX_SALTLEN)
+        return 0;
+
+    if (is_encrypted && !*psaltlen) {
+        PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_INCONSISTENT_HEADER);
+        return 0;
+    }
+
+    *in = p;
+    return 1;
+}
+
+static int derive_pvk_key(unsigned char *key,
+                          const unsigned char *salt, unsigned int saltlen,
+                          const unsigned char *pass, int passlen)
+{
+    EVP_MD_CTX *mctx = EVP_MD_CTX_new();
+    int rv = 1;
+    if (mctx == NULL
+        || !EVP_DigestInit_ex(mctx, EVP_sha1(), NULL)
+        || !EVP_DigestUpdate(mctx, salt, saltlen)
+        || !EVP_DigestUpdate(mctx, pass, passlen)
+        || !EVP_DigestFinal_ex(mctx, key, NULL))
+        rv = 0;
+
+    EVP_MD_CTX_free(mctx);
+    return rv;
+}
+
+static EVP_PKEY *do_PVK_body(const unsigned char **in,
+                             unsigned int saltlen, unsigned int keylen,
+                             pem_password_cb *cb, void *u)
+{
+    EVP_PKEY *ret = NULL;
+    const unsigned char *p = *in;
+    unsigned int magic;
+    unsigned char *enctmp = NULL, *q;
+    unsigned char keybuf[20];
+
+    EVP_CIPHER_CTX *cctx = EVP_CIPHER_CTX_new();
+    if (saltlen) {
+        char psbuf[PEM_BUFSIZE];
+        int enctmplen, inlen;
+        if (cb)
+            inlen = cb(psbuf, PEM_BUFSIZE, 0, u);
+        else
+            inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
+        if (inlen < 0) {
+            PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_PASSWORD_READ);
+            goto err;
+        }
+        enctmp = OPENSSL_malloc(keylen + 8);
+        if (enctmp == NULL) {
+            PEMerr(PEM_F_DO_PVK_BODY, ERR_R_MALLOC_FAILURE);
+            goto err;
+        }
+        if (!derive_pvk_key(keybuf, p, saltlen,
+                            (unsigned char *)psbuf, inlen))
+            goto err;
+        p += saltlen;
+        /* Copy BLOBHEADER across, decrypt rest */
+        memcpy(enctmp, p, 8);
+        p += 8;
+        if (keylen < 8) {
+            PEMerr(PEM_F_DO_PVK_BODY, PEM_R_PVK_TOO_SHORT);
+            goto err;
+        }
+        inlen = keylen - 8;
+        q = enctmp + 8;
+        if (!EVP_DecryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL))
+            goto err;
+        if (!EVP_DecryptUpdate(cctx, q, &enctmplen, p, inlen))
+            goto err;
+        if (!EVP_DecryptFinal_ex(cctx, q + enctmplen, &enctmplen))
+            goto err;
+        magic = read_ledword((const unsigned char **)&q);
+        if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
+            q = enctmp + 8;
+            memset(keybuf + 5, 0, 11);
+            if (!EVP_DecryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL))
+                goto err;
+            if (!EVP_DecryptUpdate(cctx, q, &enctmplen, p, inlen))
+                goto err;
+            if (!EVP_DecryptFinal_ex(cctx, q + enctmplen, &enctmplen))
+                goto err;
+            magic = read_ledword((const unsigned char **)&q);
+            if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
+                PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_DECRYPT);
+                goto err;
+            }
+        }
+        p = enctmp;
+    }
+
+    ret = b2i_PrivateKey(&p, keylen);
+ err:
+    EVP_CIPHER_CTX_free(cctx);
+    if (enctmp != NULL) {
+        OPENSSL_cleanse(keybuf, sizeof(keybuf));
+        OPENSSL_free(enctmp);
+    }
+    return ret;
+}
+
+EVP_PKEY *b2i_PVK_bio(BIO *in, pem_password_cb *cb, void *u)
+{
+    unsigned char pvk_hdr[24], *buf = NULL;
+    const unsigned char *p;
+    int buflen;
+    EVP_PKEY *ret = NULL;
+    unsigned int saltlen, keylen;
+    if (BIO_read(in, pvk_hdr, 24) != 24) {
+        PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
+        return NULL;
+    }
+    p = pvk_hdr;
+
+    if (!do_PVK_header(&p, 24, 0, &saltlen, &keylen))
+        return 0;
+    buflen = (int)keylen + saltlen;
+    buf = OPENSSL_malloc(buflen);
+    if (buf == NULL) {
+        PEMerr(PEM_F_B2I_PVK_BIO, ERR_R_MALLOC_FAILURE);
+        return 0;
+    }
+    p = buf;
+    if (BIO_read(in, buf, buflen) != buflen) {
+        PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
+        goto err;
+    }
+    ret = do_PVK_body(&p, saltlen, keylen, cb, u);
+
+ err:
+    OPENSSL_clear_free(buf, buflen);
+    return ret;
+}
+
+static int i2b_PVK(unsigned char **out, EVP_PKEY *pk, int enclevel,
+                   pem_password_cb *cb, void *u)
+{
+    int outlen = 24, pklen;
+    unsigned char *p = NULL, *start = NULL, *salt = NULL;
+    EVP_CIPHER_CTX *cctx = NULL;
+    if (enclevel)
+        outlen += PVK_SALTLEN;
+    pklen = do_i2b(NULL, pk, 0);
+    if (pklen < 0)
+        return -1;
+    outlen += pklen;
+    if (out == NULL)
+        return outlen;
+    if (*out != NULL) {
+        p = *out;
+    } else {
+        start = p = OPENSSL_malloc(outlen);
+        if (p == NULL) {
+            PEMerr(PEM_F_I2B_PVK, ERR_R_MALLOC_FAILURE);
+            return -1;
+        }
+    }
+
+    cctx = EVP_CIPHER_CTX_new();
+    if (cctx == NULL)
+        goto error;
+
+    write_ledword(&p, MS_PVKMAGIC);
+    write_ledword(&p, 0);
+    if (EVP_PKEY_id(pk) == EVP_PKEY_DSA)
+        write_ledword(&p, MS_KEYTYPE_SIGN);
+    else
+        write_ledword(&p, MS_KEYTYPE_KEYX);
+    write_ledword(&p, enclevel ? 1 : 0);
+    write_ledword(&p, enclevel ? PVK_SALTLEN : 0);
+    write_ledword(&p, pklen);
+    if (enclevel) {
+        if (RAND_bytes(p, PVK_SALTLEN) <= 0)
+            goto error;
+        salt = p;
+        p += PVK_SALTLEN;
+    }
+    do_i2b(&p, pk, 0);
+    if (enclevel != 0) {
+        char psbuf[PEM_BUFSIZE];
+        unsigned char keybuf[20];
+        int enctmplen, inlen;
+        if (cb)
+            inlen = cb(psbuf, PEM_BUFSIZE, 1, u);
+        else
+            inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 1, u);
+        if (inlen <= 0) {
+            PEMerr(PEM_F_I2B_PVK, PEM_R_BAD_PASSWORD_READ);
+            goto error;
+        }
+        if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN,
+                            (unsigned char *)psbuf, inlen))
+            goto error;
+        if (enclevel == 1)
+            memset(keybuf + 5, 0, 11);
+        p = salt + PVK_SALTLEN + 8;
+        if (!EVP_EncryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL))
+            goto error;
+        OPENSSL_cleanse(keybuf, 20);
+        if (!EVP_EncryptUpdate(cctx, p, &enctmplen, p, pklen - 8))
+            goto error;
+        if (!EVP_EncryptFinal_ex(cctx, p + enctmplen, &enctmplen))
+            goto error;
+    }
+
+    EVP_CIPHER_CTX_free(cctx);
+
+    if (*out == NULL)
+        *out = start;
+
+    return outlen;
+
+ error:
+    EVP_CIPHER_CTX_free(cctx);
+    if (*out == NULL)
+        OPENSSL_free(start);
+    return -1;
+}
+
+int i2b_PVK_bio(BIO *out, EVP_PKEY *pk, int enclevel,
+                pem_password_cb *cb, void *u)
+{
+    unsigned char *tmp = NULL;
+    int outlen, wrlen;
+    outlen = i2b_PVK(&tmp, pk, enclevel, cb, u);
+    if (outlen < 0)
+        return -1;
+    wrlen = BIO_write(out, tmp, outlen);
+    OPENSSL_free(tmp);
+    if (wrlen == outlen) {
+        return outlen;
+    }
+    PEMerr(PEM_F_I2B_PVK_BIO, PEM_R_BIO_WRITE_FAILURE);
+    return -1;
+}
+
+# endif
+
+#endif