1 /* p12_mutl.c */
2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
3 * project 1999.
4 */
5 /* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59 #ifndef OPENSSL_NO_HMAC
60 #include <stdio.h>
61 #include "cryptlib.h"
62 #include <openssl/hmac.h>
63 #include <openssl/rand.h>
64 #include <openssl/pkcs12.h>
65
66 /* Generate a MAC */
PKCS12_gen_mac(PKCS12 * p12,const char * pass,int passlen,unsigned char * mac,unsigned int * maclen)67 int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen,
68 unsigned char *mac, unsigned int *maclen)
69 {
70 const EVP_MD *md_type;
71 HMAC_CTX hmac;
72 unsigned char key[EVP_MAX_MD_SIZE], *salt;
73 int saltlen, iter;
74
75 if (!PKCS7_type_is_data(p12->authsafes))
76 {
77 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_CONTENT_TYPE_NOT_DATA);
78 return 0;
79 }
80
81 salt = p12->mac->salt->data;
82 saltlen = p12->mac->salt->length;
83 if (!p12->mac->iter) iter = 1;
84 else iter = ASN1_INTEGER_get (p12->mac->iter);
85 if(!(md_type =
86 EVP_get_digestbyobj (p12->mac->dinfo->algor->algorithm))) {
87 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
88 return 0;
89 }
90 if(!PKCS12_key_gen (pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter,
91 EVP_MD_size(md_type), key, md_type)) {
92 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_KEY_GEN_ERROR);
93 return 0;
94 }
95 HMAC_CTX_init(&hmac);
96 HMAC_Init_ex(&hmac, key, EVP_MD_size(md_type), md_type, NULL);
97 HMAC_Update(&hmac, p12->authsafes->d.data->data,
98 p12->authsafes->d.data->length);
99 HMAC_Final(&hmac, mac, maclen);
100 HMAC_CTX_cleanup(&hmac);
101 return 1;
102 }
103
104 /* Verify the mac */
PKCS12_verify_mac(PKCS12 * p12,const char * pass,int passlen)105 int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen)
106 {
107 unsigned char mac[EVP_MAX_MD_SIZE];
108 unsigned int maclen;
109 if(p12->mac == NULL) {
110 PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC,PKCS12_R_MAC_ABSENT);
111 return 0;
112 }
113 if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) {
114 PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC,PKCS12_R_MAC_GENERATION_ERROR);
115 return 0;
116 }
117 if ((maclen != (unsigned int)p12->mac->dinfo->digest->length)
118 || memcmp (mac, p12->mac->dinfo->digest->data, maclen)) return 0;
119 return 1;
120 }
121
122 /* Set a mac */
123
PKCS12_set_mac(PKCS12 * p12,const char * pass,int passlen,unsigned char * salt,int saltlen,int iter,const EVP_MD * md_type)124 int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen,
125 unsigned char *salt, int saltlen, int iter, const EVP_MD *md_type)
126 {
127 unsigned char mac[EVP_MAX_MD_SIZE];
128 unsigned int maclen;
129
130 if (!md_type) md_type = EVP_sha1();
131 if (PKCS12_setup_mac (p12, iter, salt, saltlen, md_type) ==
132 PKCS12_ERROR) {
133 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_SETUP_ERROR);
134 return 0;
135 }
136 if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) {
137 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_GENERATION_ERROR);
138 return 0;
139 }
140 if (!(M_ASN1_OCTET_STRING_set (p12->mac->dinfo->digest, mac, maclen))) {
141 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_STRING_SET_ERROR);
142 return 0;
143 }
144 return 1;
145 }
146
147 /* Set up a mac structure */
PKCS12_setup_mac(PKCS12 * p12,int iter,unsigned char * salt,int saltlen,const EVP_MD * md_type)148 int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
149 const EVP_MD *md_type)
150 {
151 if (!(p12->mac = PKCS12_MAC_DATA_new())) return PKCS12_ERROR;
152 if (iter > 1) {
153 if(!(p12->mac->iter = M_ASN1_INTEGER_new())) {
154 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
155 return 0;
156 }
157 if (!ASN1_INTEGER_set(p12->mac->iter, iter)) {
158 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
159 return 0;
160 }
161 }
162 if (!saltlen) saltlen = PKCS12_SALT_LEN;
163 p12->mac->salt->length = saltlen;
164 if (!(p12->mac->salt->data = OPENSSL_malloc (saltlen))) {
165 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
166 return 0;
167 }
168 if (!salt) {
169 if (RAND_pseudo_bytes (p12->mac->salt->data, saltlen) < 0)
170 return 0;
171 }
172 else memcpy (p12->mac->salt->data, salt, saltlen);
173 p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type));
174 if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) {
175 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
176 return 0;
177 }
178 p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL;
179
180 return 1;
181 }
182 #endif
183