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031e5cce SM |
1 | /* crypto/evp/p_verify.c */ |
2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
3 | * All rights reserved. | |
3e575651 | 4 | * |
031e5cce SM |
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.] | |
3e575651 SL |
57 | */ |
58 | ||
59 | #include <stdio.h> | |
031e5cce | 60 | #include "cryptlib.h" |
3e575651 SL |
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, | |
d3819813 MTL |
66 | unsigned int siglen, EVP_PKEY *pkey) |
67 | { | |
68 | unsigned char m[EVP_MAX_MD_SIZE]; | |
031e5cce SM |
69 | unsigned int m_len; |
70 | int i = 0, ok = 0, v; | |
71 | EVP_MD_CTX tmp_ctx; | |
d3819813 MTL |
72 | EVP_PKEY_CTX *pkctx = NULL; |
73 | ||
031e5cce SM |
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 | i = -1; | |
83 | pkctx = EVP_PKEY_CTX_new(pkey, NULL); | |
84 | if (!pkctx) | |
85 | goto err; | |
86 | if (EVP_PKEY_verify_init(pkctx) <= 0) | |
87 | goto err; | |
88 | if (EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0) | |
d3819813 | 89 | goto err; |
031e5cce SM |
90 | i = EVP_PKEY_verify(pkctx, sigbuf, siglen, m, m_len); |
91 | err: | |
92 | EVP_PKEY_CTX_free(pkctx); | |
93 | return i; | |
94 | } | |
95 | ||
96 | for (i = 0; i < 4; i++) { | |
97 | v = ctx->digest->required_pkey_type[i]; | |
98 | if (v == 0) | |
99 | break; | |
100 | if (pkey->type == v) { | |
101 | ok = 1; | |
102 | break; | |
d3819813 | 103 | } |
031e5cce SM |
104 | } |
105 | if (!ok) { | |
106 | EVPerr(EVP_F_EVP_VERIFYFINAL, EVP_R_WRONG_PUBLIC_KEY_TYPE); | |
107 | return (-1); | |
108 | } | |
109 | if (ctx->digest->verify == NULL) { | |
110 | EVPerr(EVP_F_EVP_VERIFYFINAL, EVP_R_NO_VERIFY_FUNCTION_CONFIGURED); | |
111 | return (0); | |
d3819813 | 112 | } |
3e575651 | 113 | |
031e5cce SM |
114 | return (ctx->digest->verify(ctx->digest->type, m, m_len, |
115 | sigbuf, siglen, pkey->pkey.ptr)); | |
d3819813 | 116 | } |