|
1 /* crypto/asn1/a_verify.c */ |
|
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
|
3 * All rights reserved. |
|
4 * |
|
5 * This package is an SSL implementation written |
|
6 * by Eric Young (eay@cryptsoft.com). |
|
7 * The implementation was written so as to conform with Netscapes SSL. |
|
8 * |
|
9 * This library is free for commercial and non-commercial use as long as |
|
10 * the following conditions are aheared to. The following conditions |
|
11 * apply to all code found in this distribution, be it the RC4, RSA, |
|
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
|
13 * included with this distribution is covered by the same copyright terms |
|
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
|
15 * |
|
16 * Copyright remains Eric Young's, and as such any Copyright notices in |
|
17 * the code are not to be removed. |
|
18 * If this package is used in a product, Eric Young should be given attribution |
|
19 * as the author of the parts of the library used. |
|
20 * This can be in the form of a textual message at program startup or |
|
21 * in documentation (online or textual) provided with the package. |
|
22 * |
|
23 * Redistribution and use in source and binary forms, with or without |
|
24 * modification, are permitted provided that the following conditions |
|
25 * are met: |
|
26 * 1. Redistributions of source code must retain the copyright |
|
27 * notice, this list of conditions and the following disclaimer. |
|
28 * 2. Redistributions in binary form must reproduce the above copyright |
|
29 * notice, this list of conditions and the following disclaimer in the |
|
30 * documentation and/or other materials provided with the distribution. |
|
31 * 3. All advertising materials mentioning features or use of this software |
|
32 * must display the following acknowledgement: |
|
33 * "This product includes cryptographic software written by |
|
34 * Eric Young (eay@cryptsoft.com)" |
|
35 * The word 'cryptographic' can be left out if the rouines from the library |
|
36 * being used are not cryptographic related :-). |
|
37 * 4. If you include any Windows specific code (or a derivative thereof) from |
|
38 * the apps directory (application code) you must include an acknowledgement: |
|
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
|
40 * |
|
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
|
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
|
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
|
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
|
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
|
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
|
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
|
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
|
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
|
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
|
51 * SUCH DAMAGE. |
|
52 * |
|
53 * The licence and distribution terms for any publically available version or |
|
54 * derivative of this code cannot be changed. i.e. this code cannot simply be |
|
55 * copied and put under another distribution licence |
|
56 * [including the GNU Public Licence.] |
|
57 */ |
|
58 |
|
59 #include <stdio.h> |
|
60 #include <time.h> |
|
61 |
|
62 #include "cryptlib.h" |
|
63 |
|
64 #ifndef NO_SYS_TYPES_H |
|
65 # include <sys/types.h> |
|
66 #endif |
|
67 |
|
68 #include <openssl/bn.h> |
|
69 #include <openssl/x509.h> |
|
70 #include <openssl/objects.h> |
|
71 #include <openssl/buffer.h> |
|
72 #include <openssl/evp.h> |
|
73 |
|
74 #ifndef NO_ASN1_OLD |
|
75 |
|
76 EXPORT_C int ASN1_verify(i2d_of_void *i2d, X509_ALGOR *a, ASN1_BIT_STRING *signature, |
|
77 char *data, EVP_PKEY *pkey) |
|
78 { |
|
79 EVP_MD_CTX ctx; |
|
80 const EVP_MD *type; |
|
81 unsigned char *p,*buf_in=NULL; |
|
82 int ret= -1,i,inl; |
|
83 |
|
84 EVP_MD_CTX_init(&ctx); |
|
85 i=OBJ_obj2nid(a->algorithm); |
|
86 type=EVP_get_digestbyname(OBJ_nid2sn(i)); |
|
87 if (type == NULL) |
|
88 { |
|
89 ASN1err(ASN1_F_ASN1_VERIFY,ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM); |
|
90 goto err; |
|
91 } |
|
92 |
|
93 inl=i2d(data,NULL); |
|
94 buf_in=OPENSSL_malloc((unsigned int)inl); |
|
95 if (buf_in == NULL) |
|
96 { |
|
97 ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_MALLOC_FAILURE); |
|
98 goto err; |
|
99 } |
|
100 p=buf_in; |
|
101 |
|
102 i2d(data,&p); |
|
103 EVP_VerifyInit_ex(&ctx,type, NULL); |
|
104 EVP_VerifyUpdate(&ctx,(unsigned char *)buf_in,inl); |
|
105 |
|
106 OPENSSL_cleanse(buf_in,(unsigned int)inl); |
|
107 OPENSSL_free(buf_in); |
|
108 |
|
109 if (EVP_VerifyFinal(&ctx,(unsigned char *)signature->data, |
|
110 (unsigned int)signature->length,pkey) <= 0) |
|
111 { |
|
112 ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_EVP_LIB); |
|
113 ret=0; |
|
114 goto err; |
|
115 } |
|
116 /* we don't need to zero the 'ctx' because we just checked |
|
117 * public information */ |
|
118 /* memset(&ctx,0,sizeof(ctx)); */ |
|
119 ret=1; |
|
120 err: |
|
121 EVP_MD_CTX_cleanup(&ctx); |
|
122 return(ret); |
|
123 } |
|
124 |
|
125 #endif |
|
126 |
|
127 |
|
128 EXPORT_C int ASN1_item_verify(const ASN1_ITEM *it, X509_ALGOR *a, ASN1_BIT_STRING *signature, |
|
129 void *asn, EVP_PKEY *pkey) |
|
130 { |
|
131 EVP_MD_CTX ctx; |
|
132 const EVP_MD *type; |
|
133 unsigned char *buf_in=NULL; |
|
134 int ret= -1,i,inl; |
|
135 |
|
136 EVP_MD_CTX_init(&ctx); |
|
137 i=OBJ_obj2nid(a->algorithm); |
|
138 type=EVP_get_digestbyname(OBJ_nid2sn(i)); |
|
139 if (type == NULL) |
|
140 { |
|
141 ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM); |
|
142 goto err; |
|
143 } |
|
144 |
|
145 if (!EVP_VerifyInit_ex(&ctx,type, NULL)) |
|
146 { |
|
147 ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ERR_R_EVP_LIB); |
|
148 ret=0; |
|
149 goto err; |
|
150 } |
|
151 |
|
152 inl = ASN1_item_i2d(asn, &buf_in, it); |
|
153 |
|
154 if (buf_in == NULL) |
|
155 { |
|
156 ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ERR_R_MALLOC_FAILURE); |
|
157 goto err; |
|
158 } |
|
159 |
|
160 EVP_VerifyUpdate(&ctx,(unsigned char *)buf_in,inl); |
|
161 |
|
162 OPENSSL_cleanse(buf_in,(unsigned int)inl); |
|
163 OPENSSL_free(buf_in); |
|
164 |
|
165 if (EVP_VerifyFinal(&ctx,(unsigned char *)signature->data, |
|
166 (unsigned int)signature->length,pkey) <= 0) |
|
167 { |
|
168 ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ERR_R_EVP_LIB); |
|
169 ret=0; |
|
170 goto err; |
|
171 } |
|
172 /* we don't need to zero the 'ctx' because we just checked |
|
173 * public information */ |
|
174 /* memset(&ctx,0,sizeof(ctx)); */ |
|
175 ret=1; |
|
176 err: |
|
177 EVP_MD_CTX_cleanup(&ctx); |
|
178 return(ret); |
|
179 } |
|
180 |
|
181 |