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132 lines
4.7 KiB
132 lines
4.7 KiB
/* p5_crpt.c */
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/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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* project 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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/* 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, const EVP_MD *md,
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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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/* 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) iter = 1;
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else 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) passlen = 0;
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else if(passlen == -1) passlen = strlen(pass);
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EVP_MD_CTX_init(&ctx);
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EVP_DigestInit_ex(&ctx, md, NULL);
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EVP_DigestUpdate(&ctx, pass, passlen);
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EVP_DigestUpdate(&ctx, salt, saltlen);
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PBEPARAM_free(pbe);
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EVP_DigestFinal_ex(&ctx, md_tmp, NULL);
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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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EVP_DigestInit_ex(&ctx, md, NULL);
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EVP_DigestUpdate(&ctx, md_tmp, mdsize);
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EVP_DigestFinal_ex (&ctx, md_tmp, NULL);
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}
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EVP_MD_CTX_cleanup(&ctx);
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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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EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de);
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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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return 1;
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}
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