Branch data 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,
72 : : unsigned int count)
73 : : {
74 : : EVP_DigestUpdate(ctx,data,count);
75 : : }
76 : : #endif
77 : :
78 : 221 : int EVP_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret, unsigned int *siglen,
79 : : EVP_PKEY *pkey)
80 : : {
81 : : unsigned char m[EVP_MAX_MD_SIZE];
82 : : unsigned int m_len;
83 : 221 : int i = 0,ok = 0,v;
84 : 221 : EVP_PKEY_CTX *pkctx = NULL;
85 : :
86 : 221 : *siglen=0;
87 [ - + ]: 221 : if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
88 : : {
89 [ # # ]: 0 : if (!EVP_DigestFinal_ex(ctx, m, &m_len))
90 : : goto err;
91 : : }
92 : : else
93 : : {
94 : : int rv;
95 : : EVP_MD_CTX tmp_ctx;
96 : 221 : EVP_MD_CTX_init(&tmp_ctx);
97 : 221 : rv = EVP_MD_CTX_copy_ex(&tmp_ctx,ctx);
98 [ + - ]: 221 : if (rv)
99 : 221 : rv = EVP_DigestFinal_ex(&tmp_ctx, m, &m_len);
100 : 221 : EVP_MD_CTX_cleanup(&tmp_ctx);
101 [ - + ]: 221 : if (!rv)
102 : 221 : return 0;
103 : : }
104 : :
105 [ + + ]: 221 : if (ctx->digest->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE)
106 : : {
107 : 177 : size_t sltmp = (size_t)EVP_PKEY_size(pkey);
108 : 177 : i = 0;
109 : 177 : pkctx = EVP_PKEY_CTX_new(pkey, NULL);
110 [ + - ]: 177 : if (!pkctx)
111 : : goto err;
112 [ + - ]: 177 : if (EVP_PKEY_sign_init(pkctx) <= 0)
113 : : goto err;
114 [ + - ]: 177 : if (EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0)
115 : : goto err;
116 [ + - ]: 177 : if (EVP_PKEY_sign(pkctx, sigret, &sltmp, m, m_len) <= 0)
117 : : goto err;
118 : 177 : *siglen = sltmp;
119 : 177 : i = 1;
120 : : err:
121 : 177 : EVP_PKEY_CTX_free(pkctx);
122 : : return i;
123 : : }
124 : :
125 [ + - ]: 44 : for (i=0; i<4; i++)
126 : : {
127 : 44 : v=ctx->digest->required_pkey_type[i];
128 [ + - ]: 44 : if (v == 0) break;
129 [ - + ]: 44 : if (pkey->type == v)
130 : : {
131 : : ok=1;
132 : : break;
133 : : }
134 : : }
135 [ - + ]: 44 : if (!ok)
136 : : {
137 : 0 : EVPerr(EVP_F_EVP_SIGNFINAL,EVP_R_WRONG_PUBLIC_KEY_TYPE);
138 : 0 : return(0);
139 : : }
140 : :
141 [ - + ]: 44 : if (ctx->digest->sign == NULL)
142 : : {
143 : 0 : EVPerr(EVP_F_EVP_SIGNFINAL,EVP_R_NO_SIGN_FUNCTION_CONFIGURED);
144 : 0 : return(0);
145 : : }
146 : 44 : return ctx->digest->sign(ctx->digest->type,m,m_len,sigret,siglen,
147 : 44 : pkey->pkey.ptr);
148 : : }
149 : :
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