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149 lines
5.2 KiB
149 lines
5.2 KiB
/* p5_crpt.c */ |
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/* |
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* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project |
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* 1999. |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 1999 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* licensing@OpenSSL.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include "cryptlib.h" |
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#include <openssl/x509.h> |
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#include <openssl/evp.h> |
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|
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/* |
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* Doesn't do anything now: Builtin PBE algorithms in static table. |
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*/ |
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void PKCS5_PBE_add(void) |
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{ |
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} |
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int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen, |
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ASN1_TYPE *param, const EVP_CIPHER *cipher, |
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const EVP_MD *md, int en_de) |
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{ |
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EVP_MD_CTX ctx; |
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unsigned char md_tmp[EVP_MAX_MD_SIZE]; |
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unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH]; |
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int i; |
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PBEPARAM *pbe; |
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int saltlen, iter; |
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unsigned char *salt; |
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const unsigned char *pbuf; |
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int mdsize; |
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int rv = 0; |
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EVP_MD_CTX_init(&ctx); |
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|
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/* Extract useful info from parameter */ |
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if (param == NULL || param->type != V_ASN1_SEQUENCE || |
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param->value.sequence == NULL) { |
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EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_DECODE_ERROR); |
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return 0; |
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} |
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pbuf = param->value.sequence->data; |
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if (!(pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length))) { |
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EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_DECODE_ERROR); |
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return 0; |
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} |
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if (!pbe->iter) |
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iter = 1; |
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else |
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iter = ASN1_INTEGER_get(pbe->iter); |
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salt = pbe->salt->data; |
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saltlen = pbe->salt->length; |
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if (!pass) |
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passlen = 0; |
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else if (passlen == -1) |
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passlen = strlen(pass); |
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if (!EVP_DigestInit_ex(&ctx, md, NULL)) |
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goto err; |
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if (!EVP_DigestUpdate(&ctx, pass, passlen)) |
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goto err; |
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if (!EVP_DigestUpdate(&ctx, salt, saltlen)) |
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goto err; |
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PBEPARAM_free(pbe); |
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if (!EVP_DigestFinal_ex(&ctx, md_tmp, NULL)) |
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goto err; |
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mdsize = EVP_MD_size(md); |
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if (mdsize < 0) |
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return 0; |
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for (i = 1; i < iter; i++) { |
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if (!EVP_DigestInit_ex(&ctx, md, NULL)) |
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goto err; |
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if (!EVP_DigestUpdate(&ctx, md_tmp, mdsize)) |
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goto err; |
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if (!EVP_DigestFinal_ex(&ctx, md_tmp, NULL)) |
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goto err; |
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} |
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OPENSSL_assert(EVP_CIPHER_key_length(cipher) <= (int)sizeof(md_tmp)); |
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memcpy(key, md_tmp, EVP_CIPHER_key_length(cipher)); |
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OPENSSL_assert(EVP_CIPHER_iv_length(cipher) <= 16); |
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memcpy(iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)), |
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EVP_CIPHER_iv_length(cipher)); |
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if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de)) |
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goto err; |
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OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE); |
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OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH); |
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OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH); |
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rv = 1; |
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err: |
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EVP_MD_CTX_cleanup(&ctx); |
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return rv; |
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}
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