1 /* p12_mutl.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) 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 */
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 int md_size;
75
76 if (!PKCS7_type_is_data(p12->authsafes))
77 {
78 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_CONTENT_TYPE_NOT_DATA);
79 return 0;
80 }
81
82 salt = p12->mac->salt->data;
83 saltlen = p12->mac->salt->length;
84 if (!p12->mac->iter) iter = 1;
85 else iter = ASN1_INTEGER_get (p12->mac->iter);
86 if(!(md_type =
87 EVP_get_digestbyobj (p12->mac->dinfo->algor->algorithm))) {
88 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
89 return 0;
90 }
91 md_size = EVP_MD_size(md_type);
92 if (md_size < 0)
93 return 0;
94 if(!PKCS12_key_gen (pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter,
95 md_size, key, md_type)) {
96 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_KEY_GEN_ERROR);
97 return 0;
98 }
99 HMAC_CTX_init(&hmac);
100 if (!HMAC_Init_ex(&hmac, key, md_size, md_type, NULL)
101 || !HMAC_Update(&hmac, p12->authsafes->d.data->data,
102 p12->authsafes->d.data->length)
103 || !HMAC_Final(&hmac, mac, maclen))
104 {
105 HMAC_CTX_cleanup(&hmac);
106 return 0;
107 }
108 HMAC_CTX_cleanup(&hmac);
109 return 1;
110 }
111
112 /* Verify the mac */
113 int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen)
114 {
115 unsigned char mac[EVP_MAX_MD_SIZE];
116 unsigned int maclen;
117 if(p12->mac == NULL) {
118 PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC,PKCS12_R_MAC_ABSENT);
119 return 0;
120 }
121 if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) {
122 PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC,PKCS12_R_MAC_GENERATION_ERROR);
123 return 0;
124 }
125 if ((maclen != (unsigned int)p12->mac->dinfo->digest->length)
126 || memcmp (mac, p12->mac->dinfo->digest->data, maclen)) return 0;
127 return 1;
128 }
129
130 /* Set a mac */
131
132 int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen,
133 unsigned char *salt, int saltlen, int iter, const EVP_MD *md_type)
134 {
135 unsigned char mac[EVP_MAX_MD_SIZE];
136 unsigned int maclen;
137
138 if (!md_type) md_type = EVP_sha1();
139 if (PKCS12_setup_mac (p12, iter, salt, saltlen, md_type) ==
140 PKCS12_ERROR) {
141 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_SETUP_ERROR);
142 return 0;
143 }
144 if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) {
145 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_GENERATION_ERROR);
146 return 0;
147 }
148 if (!(M_ASN1_OCTET_STRING_set (p12->mac->dinfo->digest, mac, maclen))) {
149 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_STRING_SET_ERROR);
150 return 0;
151 }
152 return 1;
153 }
154
155 /* Set up a mac structure */
156 int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
157 const EVP_MD *md_type)
158 {
159 if (!(p12->mac = PKCS12_MAC_DATA_new())) return PKCS12_ERROR;
160 if (iter > 1) {
161 if(!(p12->mac->iter = M_ASN1_INTEGER_new())) {
162 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
163 return 0;
164 }
165 if (!ASN1_INTEGER_set(p12->mac->iter, iter)) {
166 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
167 return 0;
168 }
169 }
170 if (!saltlen) saltlen = PKCS12_SALT_LEN;
171 p12->mac->salt->length = saltlen;
172 if (!(p12->mac->salt->data = OPENSSL_malloc (saltlen))) {
173 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
174 return 0;
175 }
176 if (!salt) {
177 if (RAND_pseudo_bytes (p12->mac->salt->data, saltlen) < 0)
178 return 0;
179 }
180 else memcpy (p12->mac->salt->data, salt, saltlen);
181 p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type));
182 if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) {
183 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
184 return 0;
185 }
186 p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL;
187
188 return 1;
189 }
190 #endif