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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_ALGORI
THM); | |
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_ERR
OR); | |
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_FAILUR
E); | |
163 return 0; | |
164 } | |
165 if (!ASN1_INTEGER_set(p12->mac->iter, iter)) { | |
166 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILUR
E); | |
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 | |
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