Line data Source code
1 : /* crypto/evp/p_sign.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 : #ifdef undef
66 : void EVP_SignInit(EVP_MD_CTX *ctx, EVP_MD *type)
67 : {
68 : EVP_DigestInit_ex(ctx, type);
69 : }
70 :
71 : void EVP_SignUpdate(EVP_MD_CTX *ctx, unsigned char *data, unsigned int count)
72 : {
73 : EVP_DigestUpdate(ctx, data, count);
74 : }
75 : #endif
76 :
77 373 : int EVP_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
78 : unsigned int *siglen, EVP_PKEY *pkey)
79 : {
80 : unsigned char m[EVP_MAX_MD_SIZE];
81 : unsigned int m_len;
82 : int i = 0, ok = 0, v;
83 : EVP_MD_CTX tmp_ctx;
84 : EVP_PKEY_CTX *pkctx = NULL;
85 :
86 373 : *siglen = 0;
87 373 : EVP_MD_CTX_init(&tmp_ctx);
88 373 : if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx))
89 : goto err;
90 373 : if (!EVP_DigestFinal_ex(&tmp_ctx, &(m[0]), &m_len))
91 : goto err;
92 373 : EVP_MD_CTX_cleanup(&tmp_ctx);
93 :
94 373 : if (ctx->digest->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE) {
95 373 : size_t sltmp = (size_t)EVP_PKEY_size(pkey);
96 : i = 0;
97 373 : pkctx = EVP_PKEY_CTX_new(pkey, NULL);
98 373 : if (!pkctx)
99 : goto err;
100 373 : if (EVP_PKEY_sign_init(pkctx) <= 0)
101 : goto err;
102 373 : if (EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0)
103 : goto err;
104 373 : if (EVP_PKEY_sign(pkctx, sigret, &sltmp, m, m_len) <= 0)
105 : goto err;
106 373 : *siglen = sltmp;
107 : i = 1;
108 : err:
109 373 : EVP_PKEY_CTX_free(pkctx);
110 : return i;
111 : }
112 :
113 0 : for (i = 0; i < 4; i++) {
114 0 : v = ctx->digest->required_pkey_type[i];
115 0 : if (v == 0)
116 : break;
117 0 : if (pkey->type == v) {
118 : ok = 1;
119 : break;
120 : }
121 : }
122 0 : if (!ok) {
123 0 : EVPerr(EVP_F_EVP_SIGNFINAL, EVP_R_WRONG_PUBLIC_KEY_TYPE);
124 0 : return (0);
125 : }
126 :
127 0 : if (ctx->digest->sign == NULL) {
128 0 : EVPerr(EVP_F_EVP_SIGNFINAL, EVP_R_NO_SIGN_FUNCTION_CONFIGURED);
129 0 : return (0);
130 : }
131 0 : return (ctx->digest->sign(ctx->digest->type, m, m_len, sigret, siglen,
132 0 : pkey->pkey.ptr));
133 : }
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