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1 /* crypto/evp/p_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 "cryptlib.h" | |
61 #include <openssl/evp.h> | |
62 #include <openssl/objects.h> | |
63 #include <openssl/x509.h> | |
64 | |
65 int EVP_VerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sigbuf, | |
66 unsigned int siglen, EVP_PKEY *pkey) | |
67 { | |
68 unsigned char m[EVP_MAX_MD_SIZE]; | |
69 unsigned int m_len; | |
70 int i = 0,ok = 0,v; | |
71 EVP_MD_CTX tmp_ctx; | |
72 EVP_PKEY_CTX *pkctx = NULL; | |
73 | |
74 EVP_MD_CTX_init(&tmp_ctx); | |
75 if (!EVP_MD_CTX_copy_ex(&tmp_ctx,ctx)) | |
76 goto err; | |
77 if (!EVP_DigestFinal_ex(&tmp_ctx,&(m[0]),&m_len)) | |
78 goto err; | |
79 EVP_MD_CTX_cleanup(&tmp_ctx); | |
80 | |
81 if (ctx->digest->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE) | |
82 { | |
83 i = -1; | |
84 pkctx = EVP_PKEY_CTX_new(pkey, NULL); | |
85 if (!pkctx) | |
86 goto err; | |
87 if (EVP_PKEY_verify_init(pkctx) <= 0) | |
88 goto err; | |
89 if (EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0) | |
90 goto err; | |
91 i = EVP_PKEY_verify(pkctx, sigbuf, siglen, m, m_len); | |
92 err: | |
93 EVP_PKEY_CTX_free(pkctx); | |
94 return i; | |
95 } | |
96 | |
97 for (i=0; i<4; i++) | |
98 { | |
99 v=ctx->digest->required_pkey_type[i]; | |
100 if (v == 0) break; | |
101 if (pkey->type == v) | |
102 { | |
103 ok=1; | |
104 break; | |
105 } | |
106 } | |
107 if (!ok) | |
108 { | |
109 EVPerr(EVP_F_EVP_VERIFYFINAL,EVP_R_WRONG_PUBLIC_KEY_TYPE); | |
110 return(-1); | |
111 } | |
112 if (ctx->digest->verify == NULL) | |
113 { | |
114 EVPerr(EVP_F_EVP_VERIFYFINAL,EVP_R_NO_VERIFY_FUNCTION_CONFIGURED
); | |
115 return(0); | |
116 } | |
117 | |
118 return(ctx->digest->verify(ctx->digest->type,m,m_len, | |
119 sigbuf,siglen,pkey->pkey.ptr)); | |
120 } | |
121 | |
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