sl@0: /* p12_mutl.c */
sl@0: /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
sl@0:  * project 1999.
sl@0:  */
sl@0: /* ====================================================================
sl@0:  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  *
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer. 
sl@0:  *
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in
sl@0:  *    the documentation and/or other materials provided with the
sl@0:  *    distribution.
sl@0:  *
sl@0:  * 3. All advertising materials mentioning features or use of this
sl@0:  *    software must display the following acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
sl@0:  *
sl@0:  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
sl@0:  *    endorse or promote products derived from this software without
sl@0:  *    prior written permission. For written permission, please contact
sl@0:  *    licensing@OpenSSL.org.
sl@0:  *
sl@0:  * 5. Products derived from this software may not be called "OpenSSL"
sl@0:  *    nor may "OpenSSL" appear in their names without prior written
sl@0:  *    permission of the OpenSSL Project.
sl@0:  *
sl@0:  * 6. Redistributions of any form whatsoever must retain the following
sl@0:  *    acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
sl@0:  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sl@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
sl@0:  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
sl@0:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
sl@0:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
sl@0:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
sl@0:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
sl@0:  * OF THE POSSIBILITY OF SUCH DAMAGE.
sl@0:  * ====================================================================
sl@0:  *
sl@0:  * This product includes cryptographic software written by Eric Young
sl@0:  * (eay@cryptsoft.com).  This product includes software written by Tim
sl@0:  * Hudson (tjh@cryptsoft.com).
sl@0:  *
sl@0:  */
sl@0: 
sl@0: #ifndef OPENSSL_NO_HMAC
sl@0: #include <stdio.h>
sl@0: #include "cryptlib.h"
sl@0: #include <openssl/hmac.h>
sl@0: #include <openssl/rand.h>
sl@0: #include <openssl/pkcs12.h>
sl@0: 
sl@0: /* Generate a MAC */
sl@0: EXPORT_C int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen,
sl@0: 		   unsigned char *mac, unsigned int *maclen)
sl@0: {
sl@0: 		const EVP_MD *md_type;
sl@0: 	HMAC_CTX hmac;
sl@0: 	unsigned char key[EVP_MAX_MD_SIZE], *salt;
sl@0: 	int saltlen, iter;
sl@0: 
sl@0: 	if (!PKCS7_type_is_data(p12->authsafes))
sl@0: 		{
sl@0: 		PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_CONTENT_TYPE_NOT_DATA);
sl@0: 		return 0;
sl@0: 		}
sl@0: 
sl@0: 	salt = p12->mac->salt->data;
sl@0: 	saltlen = p12->mac->salt->length;
sl@0: 	if (!p12->mac->iter) iter = 1;
sl@0: 	else iter = ASN1_INTEGER_get (p12->mac->iter);
sl@0:     	if(!(md_type =
sl@0: 		 EVP_get_digestbyobj (p12->mac->dinfo->algor->algorithm))) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
sl@0: 		return 0;
sl@0: 	}
sl@0: 	if(!PKCS12_key_gen (pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter,
sl@0: 				 EVP_MD_size(md_type), key, md_type)) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_KEY_GEN_ERROR);
sl@0: 		return 0;
sl@0: 	}
sl@0: 	HMAC_CTX_init(&hmac);
sl@0: 	HMAC_Init_ex(&hmac, key, EVP_MD_size(md_type), md_type, NULL);
sl@0:     	HMAC_Update(&hmac, p12->authsafes->d.data->data,
sl@0: 					 p12->authsafes->d.data->length);
sl@0:     	HMAC_Final(&hmac, mac, maclen);
sl@0:     	HMAC_CTX_cleanup(&hmac);
sl@0: 	return 1;
sl@0: 
sl@0: }
sl@0: 
sl@0: /* Verify the mac */
sl@0: EXPORT_C int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen)
sl@0: {
sl@0: 	unsigned char mac[EVP_MAX_MD_SIZE];
sl@0: 	unsigned int maclen;
sl@0: 	if(p12->mac == NULL) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC,PKCS12_R_MAC_ABSENT);
sl@0: 		return 0;
sl@0: 	}
sl@0: 	if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC,PKCS12_R_MAC_GENERATION_ERROR);
sl@0: 		return 0;
sl@0: 	}
sl@0: 	if ((maclen != (unsigned int)p12->mac->dinfo->digest->length)
sl@0: 	|| memcmp (mac, p12->mac->dinfo->digest->data, maclen)) return 0;
sl@0: 	return 1;
sl@0: }
sl@0: 
sl@0: /* Set a mac */
sl@0: 
sl@0: EXPORT_C int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen,
sl@0: 	     unsigned char *salt, int saltlen, int iter, const EVP_MD *md_type)
sl@0: {
sl@0: 	unsigned char mac[EVP_MAX_MD_SIZE];
sl@0: 	unsigned int maclen;
sl@0: 
sl@0: 	if (!md_type) md_type = EVP_sha1();
sl@0: 	if (PKCS12_setup_mac (p12, iter, salt, saltlen, md_type) ==
sl@0: 				 	PKCS12_ERROR) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_SETUP_ERROR);
sl@0: 		return 0;
sl@0: 	}
sl@0: 	if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_GENERATION_ERROR);
sl@0: 		return 0;
sl@0: 	}
sl@0: 	if (!(M_ASN1_OCTET_STRING_set (p12->mac->dinfo->digest, mac, maclen))) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_STRING_SET_ERROR);
sl@0: 						return 0;
sl@0: 	}
sl@0: 	return 1;
sl@0: }
sl@0: 
sl@0: /* Set up a mac structure */
sl@0: EXPORT_C int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
sl@0: 	     const EVP_MD *md_type)
sl@0: {
sl@0: 	if (!(p12->mac = PKCS12_MAC_DATA_new())) return PKCS12_ERROR;
sl@0: 	if (iter > 1) {
sl@0: 		if(!(p12->mac->iter = M_ASN1_INTEGER_new())) {
sl@0: 			PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
sl@0: 			return 0;
sl@0: 		}
sl@0: 		if (!ASN1_INTEGER_set(p12->mac->iter, iter)) {
sl@0: 			PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
sl@0: 			return 0;
sl@0: 		}
sl@0: 	}
sl@0: 	if (!saltlen) saltlen = PKCS12_SALT_LEN;
sl@0: 	p12->mac->salt->length = saltlen;
sl@0: 	if (!(p12->mac->salt->data = OPENSSL_malloc (saltlen))) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
sl@0: 		return 0;
sl@0: 	}
sl@0: 	if (!salt) {
sl@0: 		if (RAND_pseudo_bytes (p12->mac->salt->data, saltlen) < 0)
sl@0: 			return 0;
sl@0: 	}
sl@0: 	else memcpy (p12->mac->salt->data, salt, saltlen);
sl@0: 	p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type));
sl@0: 	if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
sl@0: 		return 0;
sl@0: 	}
sl@0: 	p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL;
sl@0: 	
sl@0: 	return 1;
sl@0: }
sl@0: #endif