]>
Commit | Line | Data |
---|---|---|
d02b48c6 | 1 | /* crypto/asn1/a_verify.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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> | |
d02b48c6 | 61 | |
b39fc560 | 62 | #include "internal/cryptlib.h" |
17f389bb AP |
63 | |
64 | #ifndef NO_SYS_TYPES_H | |
65 | # include <sys/types.h> | |
66 | #endif | |
67 | ||
ec577822 BM |
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> | |
5fe736e5 | 73 | #include "internal/asn1_int.h" |
3aeb9348 | 74 | #include "internal/evp_int.h" |
d02b48c6 | 75 | |
73e92de5 DSH |
76 | #ifndef NO_ASN1_OLD |
77 | ||
8bb826ee | 78 | int ASN1_verify(i2d_of_void *i2d, X509_ALGOR *a, ASN1_BIT_STRING *signature, |
0f113f3e MC |
79 | char *data, EVP_PKEY *pkey) |
80 | { | |
bfb0641f | 81 | EVP_MD_CTX *ctx = EVP_MD_CTX_new(); |
0f113f3e MC |
82 | const EVP_MD *type; |
83 | unsigned char *p, *buf_in = NULL; | |
84 | int ret = -1, i, inl; | |
85 | ||
6e59a892 RL |
86 | if (ctx == NULL) { |
87 | ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_MALLOC_FAILURE); | |
88 | goto err; | |
89 | } | |
0f113f3e MC |
90 | i = OBJ_obj2nid(a->algorithm); |
91 | type = EVP_get_digestbyname(OBJ_nid2sn(i)); | |
92 | if (type == NULL) { | |
93 | ASN1err(ASN1_F_ASN1_VERIFY, ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM); | |
94 | goto err; | |
95 | } | |
96 | ||
97 | if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) { | |
98 | ASN1err(ASN1_F_ASN1_VERIFY, ASN1_R_INVALID_BIT_STRING_BITS_LEFT); | |
99 | goto err; | |
100 | } | |
101 | ||
102 | inl = i2d(data, NULL); | |
103 | buf_in = OPENSSL_malloc((unsigned int)inl); | |
104 | if (buf_in == NULL) { | |
105 | ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_MALLOC_FAILURE); | |
106 | goto err; | |
107 | } | |
108 | p = buf_in; | |
109 | ||
110 | i2d(data, &p); | |
6e59a892 RL |
111 | ret = EVP_VerifyInit_ex(ctx, type, NULL) |
112 | && EVP_VerifyUpdate(ctx, (unsigned char *)buf_in, inl); | |
0f113f3e | 113 | |
4b45c6e5 | 114 | OPENSSL_clear_free(buf_in, (unsigned int)inl); |
0f113f3e MC |
115 | |
116 | if (!ret) { | |
117 | ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_EVP_LIB); | |
118 | goto err; | |
119 | } | |
120 | ret = -1; | |
121 | ||
6e59a892 | 122 | if (EVP_VerifyFinal(ctx, (unsigned char *)signature->data, |
0f113f3e MC |
123 | (unsigned int)signature->length, pkey) <= 0) { |
124 | ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_EVP_LIB); | |
125 | ret = 0; | |
126 | goto err; | |
127 | } | |
0f113f3e MC |
128 | ret = 1; |
129 | err: | |
bfb0641f | 130 | EVP_MD_CTX_free(ctx); |
0f113f3e MC |
131 | return (ret); |
132 | } | |
09ab755c | 133 | |
73e92de5 DSH |
134 | #endif |
135 | ||
31904ecd | 136 | int ASN1_item_verify(const ASN1_ITEM *it, X509_ALGOR *a, |
0f113f3e MC |
137 | ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey) |
138 | { | |
6e59a892 | 139 | EVP_MD_CTX *ctx = NULL; |
0f113f3e MC |
140 | unsigned char *buf_in = NULL; |
141 | int ret = -1, inl; | |
142 | ||
143 | int mdnid, pknid; | |
144 | ||
145 | if (!pkey) { | |
146 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_PASSED_NULL_PARAMETER); | |
147 | return -1; | |
148 | } | |
149 | ||
150 | if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) { | |
151 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ASN1_R_INVALID_BIT_STRING_BITS_LEFT); | |
152 | return -1; | |
153 | } | |
154 | ||
bfb0641f | 155 | ctx = EVP_MD_CTX_new(); |
6e59a892 RL |
156 | if (ctx == NULL) { |
157 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_MALLOC_FAILURE); | |
158 | goto err; | |
159 | } | |
0f113f3e MC |
160 | |
161 | /* Convert signature OID into digest and public key OIDs */ | |
162 | if (!OBJ_find_sigid_algs(OBJ_obj2nid(a->algorithm), &mdnid, &pknid)) { | |
163 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM); | |
164 | goto err; | |
165 | } | |
166 | if (mdnid == NID_undef) { | |
167 | if (!pkey->ameth || !pkey->ameth->item_verify) { | |
168 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, | |
169 | ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM); | |
170 | goto err; | |
171 | } | |
6e59a892 | 172 | ret = pkey->ameth->item_verify(ctx, it, asn, a, signature, pkey); |
0f113f3e MC |
173 | /* |
174 | * Return value of 2 means carry on, anything else means we exit | |
175 | * straight away: either a fatal error of the underlying verification | |
176 | * routine handles all verification. | |
177 | */ | |
178 | if (ret != 2) | |
179 | goto err; | |
180 | ret = -1; | |
181 | } else { | |
182 | const EVP_MD *type; | |
183 | type = EVP_get_digestbynid(mdnid); | |
184 | if (type == NULL) { | |
185 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, | |
186 | ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM); | |
187 | goto err; | |
188 | } | |
189 | ||
190 | /* Check public key OID matches public key type */ | |
191 | if (EVP_PKEY_type(pknid) != pkey->ameth->pkey_id) { | |
192 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ASN1_R_WRONG_PUBLIC_KEY_TYPE); | |
193 | goto err; | |
194 | } | |
195 | ||
6e59a892 | 196 | if (!EVP_DigestVerifyInit(ctx, NULL, type, NULL, pkey)) { |
0f113f3e MC |
197 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_EVP_LIB); |
198 | ret = 0; | |
199 | goto err; | |
200 | } | |
201 | ||
202 | } | |
203 | ||
204 | inl = ASN1_item_i2d(asn, &buf_in, it); | |
205 | ||
206 | if (buf_in == NULL) { | |
207 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_MALLOC_FAILURE); | |
208 | goto err; | |
209 | } | |
210 | ||
6e59a892 | 211 | ret = EVP_DigestVerifyUpdate(ctx, buf_in, inl); |
0f113f3e | 212 | |
4b45c6e5 | 213 | OPENSSL_clear_free(buf_in, (unsigned int)inl); |
0f113f3e MC |
214 | |
215 | if (!ret) { | |
216 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_EVP_LIB); | |
217 | goto err; | |
218 | } | |
219 | ret = -1; | |
220 | ||
6e59a892 | 221 | if (EVP_DigestVerifyFinal(ctx, signature->data, |
0f113f3e MC |
222 | (size_t)signature->length) <= 0) { |
223 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_EVP_LIB); | |
224 | ret = 0; | |
225 | goto err; | |
226 | } | |
0f113f3e MC |
227 | ret = 1; |
228 | err: | |
bfb0641f | 229 | EVP_MD_CTX_free(ctx); |
0f113f3e MC |
230 | return (ret); |
231 | } |