diff options
Diffstat (limited to 'crypto/pem/pvkfmt.c')
| -rw-r--r-- | crypto/pem/pvkfmt.c | 949 |
1 files changed, 949 insertions, 0 deletions
diff --git a/crypto/pem/pvkfmt.c b/crypto/pem/pvkfmt.c new file mode 100644 index 0000000000..0d6c749c33 --- /dev/null +++ b/crypto/pem/pvkfmt.c @@ -0,0 +1,949 @@ +/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL + * project 2005. + */ +/* ==================================================================== + * Copyright (c) 2005 The OpenSSL Project. All rights reserved. + * + * 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 above 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 acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * licensing@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +/* Support for PVK format keys and related structures (such a PUBLICKEYBLOB + * and PRIVATEKEYBLOB). + */ + +#include "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 = *p++; + ret |= (*p++ << 8); + ret |= (*p++ << 16); + ret |= (*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) + { + const unsigned char *p; + unsigned char *tmpbuf, *q; + unsigned int i; + p = *in + nbyte - 1; + tmpbuf = OPENSSL_malloc(nbyte); + if (!tmpbuf) + return 0; + q = tmpbuf; + for (i = 0; i < nbyte; i++) + *q++ = *p--; + *r = BN_bin2bn(tmpbuf, nbyte, NULL); + OPENSSL_free(tmpbuf); + if (*r) + { + *in += nbyte; + return 1; + } + else + return 0; + } + + +/* 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 + +/* 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 + +static EVP_PKEY *b2i_rsa(const unsigned char **in, unsigned int length, + unsigned int bitlen, int ispub); +static EVP_PKEY *b2i_dss(const unsigned char **in, unsigned int length, + 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; + 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; + 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, length, bitlen, ispub); + else + return b2i_rsa(&p, length, 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); + buf = OPENSSL_malloc(length); + if (!buf) + { + 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, length, bitlen, ispub); + else + ret = b2i_rsa(&p, length, bitlen, ispub); + + err: + if (buf) + OPENSSL_free(buf); + return ret; + } + +static EVP_PKEY *b2i_dss(const unsigned char **in, unsigned int length, + unsigned int bitlen, int ispub) + { + const unsigned char *p = *in; + EVP_PKEY *ret = NULL; + DSA *dsa = NULL; + BN_CTX *ctx = NULL; + unsigned int nbyte; + nbyte = (bitlen + 7) >> 3; + + dsa = DSA_new(); + ret = EVP_PKEY_new(); + if (!dsa || !ret) + goto memerr; + if (!read_lebn(&p, nbyte, &dsa->p)) + goto memerr; + if (!read_lebn(&p, 20, &dsa->q)) + goto memerr; + if (!read_lebn(&p, nbyte, &dsa->g)) + goto memerr; + if (ispub) + { + if (!read_lebn(&p, nbyte, &dsa->pub_key)) + goto memerr; + } + else + { + if (!read_lebn(&p, 20, &dsa->priv_key)) + goto memerr; + /* Calculate public key */ + if (!(dsa->pub_key = BN_new())) + goto memerr; + if (!(ctx = BN_CTX_new())) + goto memerr; + + if (!BN_mod_exp(dsa->pub_key, dsa->g, + dsa->priv_key, dsa->p, ctx)) + + goto memerr; + BN_CTX_free(ctx); + } + + EVP_PKEY_set1_DSA(ret, dsa); + DSA_free(dsa); + *in = p; + return ret; + + memerr: + PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE); + if (dsa) + DSA_free(dsa); + if (ret) + EVP_PKEY_free(ret); + if (ctx) + BN_CTX_free(ctx); + return NULL; + } + +static EVP_PKEY *b2i_rsa(const unsigned char **in, unsigned int length, + unsigned int bitlen, int ispub) + + { + const unsigned char *p = *in; + EVP_PKEY *ret = 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 || !ret) + goto memerr; + rsa->e = BN_new(); + if (!rsa->e) + goto memerr; + if (!BN_set_word(rsa->e, read_ledword(&p))) + goto memerr; + if (!read_lebn(&p, nbyte, &rsa->n)) + goto memerr; + if (!ispub) + { + if (!read_lebn(&p, hnbyte, &rsa->p)) + goto memerr; + if (!read_lebn(&p, hnbyte, &rsa->q)) + goto memerr; + if (!read_lebn(&p, hnbyte, &rsa->dmp1)) + goto memerr; + if (!read_lebn(&p, hnbyte, &rsa->dmq1)) + goto memerr; + if (!read_lebn(&p, hnbyte, &rsa->iqmp)) + goto memerr; + if (!read_lebn(&p, nbyte, &rsa->d)) + goto memerr; + } + + EVP_PKEY_set1_RSA(ret, rsa); + RSA_free(rsa); + *in = p; + return ret; + memerr: + PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE); + if (rsa) + RSA_free(rsa); + if (ret) + 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) + { + int nb, i; + unsigned char *p = *out, *q, c; + nb = BN_num_bytes(bn); + BN_bn2bin(bn, p); + q = p + nb - 1; + /* In place byte order reversal */ + for (i = 0; i < nb/2; i++) + { + c = *p; + *p++ = *q; + *q-- = c; + } + *out += nb; + /* Pad with zeroes if we have to */ + if (len > 0) + { + len -= nb; + if (len > 0) + { + memset(*out, 0, 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; + if (pk->type == EVP_PKEY_DSA) + { + bitlen = check_bitlen_dsa(pk->pkey.dsa, ispub, &magic); + keyalg = MS_KEYALG_DSS_SIGN; + } + else if (pk->type == EVP_PKEY_RSA) + { + bitlen = check_bitlen_rsa(pk->pkey.rsa, 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 + { + p = OPENSSL_malloc(outlen); + if (!p) + 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, pk->pkey.dsa, ispub); + else + write_rsa(&p, pk->pkey.rsa, 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; + bitlen = BN_num_bits(dsa->p); + if ((bitlen & 7) || (BN_num_bits(dsa->q) != 160) + || (BN_num_bits(dsa->g) > bitlen)) + goto badkey; + if (ispub) + { + if (BN_num_bits(dsa->pub_key) > bitlen) + goto badkey; + *pmagic = MS_DSS1MAGIC; + } + else + { + if (BN_num_bits(dsa->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; + if (BN_num_bits(rsa->e) > 32) + goto badkey; + bitlen = BN_num_bits(rsa->n); + nbyte = BN_num_bytes(rsa->n); + hnbyte = (BN_num_bits(rsa->n) + 15) >> 4; + if (ispub) + { + *pmagic = MS_RSA1MAGIC; + return bitlen; + } + else + { + *pmagic = MS_RSA2MAGIC; + /* For private key each component must fit within nbyte or + * hnbyte. + */ + if (BN_num_bytes(rsa->d) > nbyte) + goto badkey; + if ((BN_num_bytes(rsa->iqmp) > hnbyte) + || (BN_num_bytes(rsa->p) > hnbyte) + || (BN_num_bytes(rsa->q) > hnbyte) + || (BN_num_bytes(rsa->dmp1) > hnbyte) + || (BN_num_bytes(rsa->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; + nbyte = BN_num_bytes(rsa->n); + hnbyte = (BN_num_bits(rsa->n) + 15) >> 4; + write_lebn(out, rsa->e, 4); + write_lebn(out, rsa->n, -1); + if (ispub) + return; + write_lebn(out, rsa->p, hnbyte); + write_lebn(out, rsa->q, hnbyte); + write_lebn(out, rsa->dmp1, hnbyte); + write_lebn(out, rsa->dmq1, hnbyte); + write_lebn(out, rsa->iqmp, hnbyte); + write_lebn(out, rsa->d, nbyte); + } + + +static void write_dsa(unsigned char **out, DSA *dsa, int ispub) + { + int nbyte; + nbyte = BN_num_bytes(dsa->p); + write_lebn(out, dsa->p, nbyte); + write_lebn(out, dsa->q, 20); + write_lebn(out, dsa->g, nbyte); + if (ispub) + write_lebn(out, dsa->pub_key, nbyte); + else + write_lebn(out, dsa->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); + } + +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, keytype, is_encrypted; + if (skip_magic) + { + if (length < 20) + { + PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT); + return 0; + } + length -= 20; + } + else + { + if (length < 24) + { + PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT); + return 0; + } + length -= 24; + 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 (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; + int rv = 1; + EVP_MD_CTX_init(&mctx); + if (!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_cleanup(&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; + EVP_CIPHER_CTX cctx; + EVP_CIPHER_CTX_init(&cctx); + if (saltlen) + { + char psbuf[PEM_BUFSIZE]; + unsigned char keybuf[20]; + 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); + return NULL; + } + enctmp = OPENSSL_malloc(keylen + 8); + if (!enctmp) + { + PEMerr(PEM_F_DO_PVK_BODY, ERR_R_MALLOC_FAILURE); + return NULL; + } + if (!derive_pvk_key(keybuf, p, saltlen, + (unsigned char *)psbuf, inlen)) + return NULL; + p += saltlen; + /* Copy BLOBHEADER across, decrypt rest */ + memcpy(enctmp, p, 8); + p += 8; + 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; + OPENSSL_cleanse(keybuf, 20); + 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; + } + } + else + OPENSSL_cleanse(keybuf, 20); + p = enctmp; + } + + ret = b2i_PrivateKey(&p, keylen); + err: + EVP_CIPHER_CTX_cleanup(&cctx); + if (enctmp && saltlen) + 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) + { + 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: + if (buf) + { + OPENSSL_cleanse(buf, buflen); + OPENSSL_free(buf); + } + return ret; + } + + + +static int i2b_PVK(unsigned char **out, EVP_PKEY*pk, int enclevel, + pem_password_cb *cb, void *u) + { + int outlen = 24, noinc, pklen; + unsigned char *p, *salt = NULL; + EVP_CIPHER_CTX cctx; + EVP_CIPHER_CTX_init(&cctx); + if (enclevel) + outlen += PVK_SALTLEN; + pklen = do_i2b(NULL, pk, 0); + if (pklen < 0) + return -1; + outlen += pklen; + if (!out) + return outlen; + if (*out) + { + p = *out; + noinc = 0; + } + else + { + p = OPENSSL_malloc(outlen); + if (!p) + { + PEMerr(PEM_F_I2B_PVK,ERR_R_MALLOC_FAILURE); + return -1; + } + *out = p; + noinc = 1; + } + + write_ledword(&p, MS_PVKMAGIC); + write_ledword(&p, 0); + if (pk->type == 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) + return outlen; + else + { + 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_DecryptUpdate(&cctx, p, &enctmplen, p, pklen - 8)) + goto error; + if (!EVP_DecryptFinal_ex(&cctx, p + enctmplen, &enctmplen)) + goto error; + } + EVP_CIPHER_CTX_cleanup(&cctx); + return outlen; + + error: + EVP_CIPHER_CTX_cleanup(&cctx); + 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) + { + PEMerr(PEM_F_I2B_PVK_BIO, PEM_R_BIO_WRITE_FAILURE); + return outlen; + } + return -1; + } +#endif |