p12_mutl.c revision 296465 
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/hmac.h>
64# include <openssl/rand.h>
65# include <openssl/pkcs12.h>
66
67/* Generate a MAC */
68int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen,
69                   unsigned char *mac, unsigned int *maclen)
70{
71    const EVP_MD *md_type;
72    HMAC_CTX hmac;
73    unsigned char key[EVP_MAX_MD_SIZE], *salt;
74    int saltlen, iter;
75
76    if (!PKCS7_type_is_data(p12->authsafes)) {
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)
84        iter = 1;
85    else
86        iter = ASN1_INTEGER_get(p12->mac->iter);
87    if (!(md_type = 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    if (!PKCS12_key_gen(pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter,
92                        EVP_MD_size(md_type), key, md_type)) {
93        PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_KEY_GEN_ERROR);
94        return 0;
95    }
96    HMAC_CTX_init(&hmac);
97    HMAC_Init_ex(&hmac, key, EVP_MD_size(md_type), md_type, NULL);
98    HMAC_Update(&hmac, p12->authsafes->d.data->data,
99                p12->authsafes->d.data->length);
100    HMAC_Final(&hmac, mac, maclen);
101    HMAC_CTX_cleanup(&hmac);
102    return 1;
103}
104
105/* Verify the mac */
106int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen)
107{
108    unsigned char mac[EVP_MAX_MD_SIZE];
109    unsigned int maclen;
110    if (p12->mac == NULL) {
111        PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_ABSENT);
112        return 0;
113    }
114    if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) {
115        PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_GENERATION_ERROR);
116        return 0;
117    }
118    if ((maclen != (unsigned int)p12->mac->dinfo->digest->length)
119        || memcmp(mac, p12->mac->dinfo->digest->data, maclen))
120        return 0;
121    return 1;
122}
123
124/* Set a mac */
125
126int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen,
127                   unsigned char *salt, int saltlen, int iter,
128                   const EVP_MD *md_type)
129{
130    unsigned char mac[EVP_MAX_MD_SIZE];
131    unsigned int maclen;
132
133    if (!md_type)
134        md_type = EVP_sha1();
135    if (PKCS12_setup_mac(p12, iter, salt, saltlen, md_type) == PKCS12_ERROR) {
136        PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_SETUP_ERROR);
137        return 0;
138    }
139    if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) {
140        PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_GENERATION_ERROR);
141        return 0;
142    }
143    if (!(M_ASN1_OCTET_STRING_set(p12->mac->dinfo->digest, mac, maclen))) {
144        PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_STRING_SET_ERROR);
145        return 0;
146    }
147    return 1;
148}
149
150/* Set up a mac structure */
151int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
152                     const EVP_MD *md_type)
153{
154    if (!(p12->mac = PKCS12_MAC_DATA_new()))
155        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)
167        saltlen = PKCS12_SALT_LEN;
168    p12->mac->salt->length = saltlen;
169    if (!(p12->mac->salt->data = OPENSSL_malloc(saltlen))) {
170        PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
171        return 0;
172    }
173    if (!salt) {
174        if (RAND_pseudo_bytes(p12->mac->salt->data, saltlen) < 0)
175            return 0;
176    } else
177        memcpy(p12->mac->salt->data, salt, saltlen);
178    p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type));
179    if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) {
180        PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
181        return 0;
182    }
183    p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL;
184
185    return 1;
186}
187#endif
188