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 */
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 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 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 HMAC_CTX_cleanup(&hmac);
105 return 1;
106 }
107
108 /* Verify the mac */
PKCS12_verify_mac(PKCS12 * p12,const char * pass,int passlen)109 int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen)
110 {
111 unsigned char mac[EVP_MAX_MD_SIZE];
112 unsigned int maclen;
113 if(p12->mac == NULL) {
114 PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC,PKCS12_R_MAC_ABSENT);
115 return 0;
116 }
117 if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) {
118 PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC,PKCS12_R_MAC_GENERATION_ERROR);
119 return 0;
120 }
121 if ((maclen != (unsigned int)p12->mac->dinfo->digest->length)
122 || memcmp (mac, p12->mac->dinfo->digest->data, maclen)) return 0;
123 return 1;
124 }
125
126 /* Set a mac */
127
PKCS12_set_mac(PKCS12 * p12,const char * pass,int passlen,unsigned char * salt,int saltlen,int iter,const EVP_MD * md_type)128 int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen,
129 unsigned char *salt, int saltlen, int iter, const EVP_MD *md_type)
130 {
131 unsigned char mac[EVP_MAX_MD_SIZE];
132 unsigned int maclen;
133
134 if (!md_type) md_type = EVP_sha1();
135 if (PKCS12_setup_mac (p12, iter, salt, saltlen, md_type) ==
136 PKCS12_ERROR) {
137 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_SETUP_ERROR);
138 return 0;
139 }
140 if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) {
141 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_GENERATION_ERROR);
142 return 0;
143 }
144 if (!(M_ASN1_OCTET_STRING_set (p12->mac->dinfo->digest, mac, maclen))) {
145 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_STRING_SET_ERROR);
146 return 0;
147 }
148 return 1;
149 }
150
151 /* Set up a mac structure */
PKCS12_setup_mac(PKCS12 * p12,int iter,unsigned char * salt,int saltlen,const EVP_MD * md_type)152 int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
153 const EVP_MD *md_type)
154 {
155 if (!(p12->mac = PKCS12_MAC_DATA_new())) return PKCS12_ERROR;
156 if (iter > 1) {
157 if(!(p12->mac->iter = M_ASN1_INTEGER_new())) {
158 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
159 return 0;
160 }
161 if (!ASN1_INTEGER_set(p12->mac->iter, iter)) {
162 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
163 return 0;
164 }
165 }
166 if (!saltlen) saltlen = PKCS12_SALT_LEN;
167 p12->mac->salt->length = saltlen;
168 if (!(p12->mac->salt->data = OPENSSL_malloc (saltlen))) {
169 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
170 return 0;
171 }
172 if (!salt) {
173 if (RAND_pseudo_bytes (p12->mac->salt->data, saltlen) < 0)
174 return 0;
175 }
176 else memcpy (p12->mac->salt->data, salt, saltlen);
177 p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type));
178 if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) {
179 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
180 return 0;
181 }
182 p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL;
183
184 return 1;
185 }
186 #endif
187