1 /* crypto/pem/pem_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/rand.h>
62 #include <openssl/evp.h>
63 #include <openssl/objects.h>
64 #include <openssl/x509.h>
65 #include <openssl/pem.h>
66
PEM_SignInit(EVP_MD_CTX * ctx,EVP_MD * type)67 void PEM_SignInit(EVP_MD_CTX *ctx, EVP_MD *type)
68 {
69 EVP_DigestInit_ex(ctx, type, NULL);
70 }
71
PEM_SignUpdate(EVP_MD_CTX * ctx,unsigned char * data,unsigned int count)72 void PEM_SignUpdate(EVP_MD_CTX *ctx, unsigned char *data, unsigned int count)
73 {
74 EVP_DigestUpdate(ctx, data, count);
75 }
76
PEM_SignFinal(EVP_MD_CTX * ctx,unsigned char * sigret,unsigned int * siglen,EVP_PKEY * pkey)77 int PEM_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
78 unsigned int *siglen, EVP_PKEY *pkey)
79 {
80 unsigned char *m;
81 int i, ret = 0;
82 unsigned int m_len;
83
84 m = (unsigned char *)OPENSSL_malloc(EVP_PKEY_size(pkey) + 2);
85 if (m == NULL) {
86 PEMerr(PEM_F_PEM_SIGNFINAL, ERR_R_MALLOC_FAILURE);
87 goto err;
88 }
89
90 if (EVP_SignFinal(ctx, m, &m_len, pkey) <= 0)
91 goto err;
92
93 i = EVP_EncodeBlock(sigret, m, m_len);
94 *siglen = i;
95 ret = 1;
96 err:
97 /* ctx has been zeroed by EVP_SignFinal() */
98 if (m != NULL)
99 OPENSSL_free(m);
100 return (ret);
101 }
102