1 /* p12_mutl.c */
2 /*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 1999.
5 */
6 /* ====================================================================
7 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60 #ifndef OPENSSL_NO_HMAC
61 # include <stdio.h>
62 # include "cryptlib.h"
63 # include <openssl/crypto.h>
64 # include <openssl/hmac.h>
65 # include <openssl/rand.h>
66 # include <openssl/pkcs12.h>
67
68 /* Generate a MAC */
PKCS12_gen_mac(PKCS12 * p12,const char * pass,int passlen,unsigned char * mac,unsigned int * maclen)69 int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen,
70 unsigned char *mac, unsigned int *maclen)
71 {
72 const EVP_MD *md_type;
73 HMAC_CTX hmac;
74 unsigned char key[EVP_MAX_MD_SIZE], *salt;
75 int saltlen, iter;
76 int md_size;
77
78 if (!PKCS7_type_is_data(p12->authsafes)) {
79 PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_CONTENT_TYPE_NOT_DATA);
80 return 0;
81 }
82
83 salt = p12->mac->salt->data;
84 saltlen = p12->mac->salt->length;
85 if (!p12->mac->iter)
86 iter = 1;
87 else
88 iter = ASN1_INTEGER_get(p12->mac->iter);
89 if (!(md_type = EVP_get_digestbyobj(p12->mac->dinfo->algor->algorithm))) {
90 PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
91 return 0;
92 }
93 md_size = EVP_MD_size(md_type);
94 if (md_size < 0)
95 return 0;
96 if (!PKCS12_key_gen(pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter,
97 md_size, key, md_type)) {
98 PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_KEY_GEN_ERROR);
99 return 0;
100 }
101 HMAC_CTX_init(&hmac);
102 if (!HMAC_Init_ex(&hmac, key, md_size, md_type, NULL)
103 || !HMAC_Update(&hmac, p12->authsafes->d.data->data,
104 p12->authsafes->d.data->length)
105 || !HMAC_Final(&hmac, mac, maclen)) {
106 HMAC_CTX_cleanup(&hmac);
107 return 0;
108 }
109 HMAC_CTX_cleanup(&hmac);
110 return 1;
111 }
112
113 /* Verify the mac */
PKCS12_verify_mac(PKCS12 * p12,const char * pass,int passlen)114 int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen)
115 {
116 unsigned char mac[EVP_MAX_MD_SIZE];
117 unsigned int maclen;
118 if (p12->mac == NULL) {
119 PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_ABSENT);
120 return 0;
121 }
122 if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) {
123 PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_GENERATION_ERROR);
124 return 0;
125 }
126 if ((maclen != (unsigned int)p12->mac->dinfo->digest->length)
127 || CRYPTO_memcmp(mac, p12->mac->dinfo->digest->data, maclen))
128 return 0;
129 return 1;
130 }
131
132 /* Set a mac */
133
PKCS12_set_mac(PKCS12 * p12,const char * pass,int passlen,unsigned char * salt,int saltlen,int iter,const EVP_MD * md_type)134 int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen,
135 unsigned char *salt, int saltlen, int iter,
136 const EVP_MD *md_type)
137 {
138 unsigned char mac[EVP_MAX_MD_SIZE];
139 unsigned int maclen;
140
141 if (!md_type)
142 md_type = EVP_sha1();
143 if (PKCS12_setup_mac(p12, iter, salt, saltlen, md_type) == PKCS12_ERROR) {
144 PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_SETUP_ERROR);
145 return 0;
146 }
147 if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) {
148 PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_GENERATION_ERROR);
149 return 0;
150 }
151 if (!(M_ASN1_OCTET_STRING_set(p12->mac->dinfo->digest, mac, maclen))) {
152 PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_STRING_SET_ERROR);
153 return 0;
154 }
155 return 1;
156 }
157
158 /* Set up a mac structure */
PKCS12_setup_mac(PKCS12 * p12,int iter,unsigned char * salt,int saltlen,const EVP_MD * md_type)159 int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
160 const EVP_MD *md_type)
161 {
162 if (!(p12->mac = PKCS12_MAC_DATA_new()))
163 return PKCS12_ERROR;
164 if (iter > 1) {
165 if (!(p12->mac->iter = M_ASN1_INTEGER_new())) {
166 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
167 return 0;
168 }
169 if (!ASN1_INTEGER_set(p12->mac->iter, iter)) {
170 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
171 return 0;
172 }
173 }
174 if (!saltlen)
175 saltlen = PKCS12_SALT_LEN;
176 p12->mac->salt->length = saltlen;
177 if (!(p12->mac->salt->data = OPENSSL_malloc(saltlen))) {
178 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
179 return 0;
180 }
181 if (!salt) {
182 if (RAND_pseudo_bytes(p12->mac->salt->data, saltlen) < 0)
183 return 0;
184 } else
185 memcpy(p12->mac->salt->data, salt, saltlen);
186 p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type));
187 if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) {
188 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
189 return 0;
190 }
191 p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL;
192
193 return 1;
194 }
195 #endif
196