173 lines
6 KiB
C
173 lines
6 KiB
C
/* p12_mutl.c */
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/* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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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#ifndef OPENSSL_NO_HMAC
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/hmac.h>
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#include <openssl/rand.h>
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#include <openssl/pkcs12.h>
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/* Generate a MAC */
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int PKCS12_gen_mac (PKCS12 *p12, const char *pass, int passlen,
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unsigned char *mac, unsigned int *maclen)
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{
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const EVP_MD *md_type;
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HMAC_CTX hmac;
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unsigned char key[PKCS12_MAC_KEY_LENGTH], *salt;
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int saltlen, iter;
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salt = p12->mac->salt->data;
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saltlen = p12->mac->salt->length;
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if (!p12->mac->iter) iter = 1;
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else iter = ASN1_INTEGER_get (p12->mac->iter);
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if(!(md_type =
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EVP_get_digestbyobj (p12->mac->dinfo->algor->algorithm))) {
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PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
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return 0;
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}
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if(!PKCS12_key_gen (pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter,
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PKCS12_MAC_KEY_LENGTH, key, md_type)) {
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PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_KEY_GEN_ERROR);
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return 0;
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}
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HMAC_CTX_init(&hmac);
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HMAC_Init_ex(&hmac, key, PKCS12_MAC_KEY_LENGTH, md_type, NULL);
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HMAC_Update(&hmac, p12->authsafes->d.data->data,
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p12->authsafes->d.data->length);
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HMAC_Final(&hmac, mac, maclen);
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HMAC_CTX_cleanup(&hmac);
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return 1;
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}
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/* Verify the mac */
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int PKCS12_verify_mac (PKCS12 *p12, const char *pass, int passlen)
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{
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unsigned char mac[EVP_MAX_MD_SIZE];
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unsigned int maclen;
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if(p12->mac == NULL) {
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PKCS12err(PKCS12_F_VERIFY_MAC,PKCS12_R_MAC_ABSENT);
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return 0;
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}
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if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) {
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PKCS12err(PKCS12_F_VERIFY_MAC,PKCS12_R_MAC_GENERATION_ERROR);
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return 0;
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}
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if ((maclen != (unsigned int)p12->mac->dinfo->digest->length)
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|| memcmp (mac, p12->mac->dinfo->digest->data, maclen)) return 0;
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return 1;
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}
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/* Set a mac */
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int PKCS12_set_mac (PKCS12 *p12, const char *pass, int passlen,
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unsigned char *salt, int saltlen, int iter, const EVP_MD *md_type)
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{
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unsigned char mac[EVP_MAX_MD_SIZE];
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unsigned int maclen;
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if (!md_type) md_type = EVP_sha1();
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if (PKCS12_setup_mac (p12, iter, salt, saltlen, md_type) ==
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PKCS12_ERROR) {
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PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_SETUP_ERROR);
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return 0;
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}
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if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) {
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PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_GENERATION_ERROR);
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return 0;
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}
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if (!(M_ASN1_OCTET_STRING_set (p12->mac->dinfo->digest, mac, maclen))) {
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PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_STRING_SET_ERROR);
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return 0;
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}
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return 1;
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}
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/* Set up a mac structure */
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int PKCS12_setup_mac (PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
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const EVP_MD *md_type)
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{
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if (!(p12->mac = PKCS12_MAC_DATA_new())) return PKCS12_ERROR;
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if (iter > 1) {
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if(!(p12->mac->iter = M_ASN1_INTEGER_new())) {
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PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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ASN1_INTEGER_set(p12->mac->iter, iter);
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}
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if (!saltlen) saltlen = PKCS12_SALT_LEN;
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p12->mac->salt->length = saltlen;
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if (!(p12->mac->salt->data = OPENSSL_malloc (saltlen))) {
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PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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if (!salt) {
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if (RAND_pseudo_bytes (p12->mac->salt->data, saltlen) < 0)
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return 0;
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}
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else memcpy (p12->mac->salt->data, salt, saltlen);
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p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type));
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if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) {
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PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL;
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return 1;
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}
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#endif
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