Branch data Line data Source code
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 : 242 : 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 : 242 : int i = 0,ok = 0,v;
71 : 242 : EVP_PKEY_CTX *pkctx = NULL;
72 : :
73 [ - + ]: 242 : if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
74 : : {
75 [ # # ]: 0 : if (!EVP_DigestFinal_ex(ctx, m, &m_len))
76 : : goto err;
77 : : }
78 : : else
79 : : {
80 : : int rv;
81 : : EVP_MD_CTX tmp_ctx;
82 : 242 : EVP_MD_CTX_init(&tmp_ctx);
83 : 242 : rv = EVP_MD_CTX_copy_ex(&tmp_ctx,ctx);
84 [ + - ]: 242 : if (rv)
85 : 242 : rv = EVP_DigestFinal_ex(&tmp_ctx, m, &m_len);
86 : 242 : EVP_MD_CTX_cleanup(&tmp_ctx);
87 [ - + ]: 242 : if (!rv)
88 : 242 : return 0;
89 : : }
90 : :
91 [ + + ]: 242 : if (ctx->digest->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE)
92 : : {
93 : 198 : i = -1;
94 : 198 : pkctx = EVP_PKEY_CTX_new(pkey, NULL);
95 [ + - ]: 198 : if (!pkctx)
96 : : goto err;
97 [ + - ]: 198 : if (EVP_PKEY_verify_init(pkctx) <= 0)
98 : : goto err;
99 [ + - ]: 198 : if (EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0)
100 : : goto err;
101 : 198 : i = EVP_PKEY_verify(pkctx, sigbuf, siglen, m, m_len);
102 : : err:
103 : 198 : EVP_PKEY_CTX_free(pkctx);
104 : 198 : return i;
105 : : }
106 : :
107 [ + - ]: 44 : for (i=0; i<4; i++)
108 : : {
109 : 44 : v=ctx->digest->required_pkey_type[i];
110 [ + - ]: 44 : if (v == 0) break;
111 [ - + ]: 44 : if (pkey->type == v)
112 : : {
113 : : ok=1;
114 : : break;
115 : : }
116 : : }
117 [ - + ]: 44 : if (!ok)
118 : : {
119 : 0 : EVPerr(EVP_F_EVP_VERIFYFINAL,EVP_R_WRONG_PUBLIC_KEY_TYPE);
120 : 0 : return(-1);
121 : : }
122 [ - + ]: 44 : if (ctx->digest->verify == NULL)
123 : : {
124 : 0 : EVPerr(EVP_F_EVP_VERIFYFINAL,EVP_R_NO_VERIFY_FUNCTION_CONFIGURED);
125 : 0 : return(0);
126 : : }
127 : :
128 : 44 : return(ctx->digest->verify(ctx->digest->type,m,m_len,
129 : 44 : sigbuf,siglen,pkey->pkey.ptr));
130 : : }
131 : :
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