1*de0e0e4dSAntonio Huete Jimenez /* $OpenBSD: p_sign.c,v 1.16 2022/01/14 08:38:06 tb Exp $ */
2f5b1c8a1SJohn Marino /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3f5b1c8a1SJohn Marino * All rights reserved.
4f5b1c8a1SJohn Marino *
5f5b1c8a1SJohn Marino * This package is an SSL implementation written
6f5b1c8a1SJohn Marino * by Eric Young (eay@cryptsoft.com).
7f5b1c8a1SJohn Marino * The implementation was written so as to conform with Netscapes SSL.
8f5b1c8a1SJohn Marino *
9f5b1c8a1SJohn Marino * This library is free for commercial and non-commercial use as long as
10f5b1c8a1SJohn Marino * the following conditions are aheared to. The following conditions
11f5b1c8a1SJohn Marino * apply to all code found in this distribution, be it the RC4, RSA,
12f5b1c8a1SJohn Marino * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13f5b1c8a1SJohn Marino * included with this distribution is covered by the same copyright terms
14f5b1c8a1SJohn Marino * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15f5b1c8a1SJohn Marino *
16f5b1c8a1SJohn Marino * Copyright remains Eric Young's, and as such any Copyright notices in
17f5b1c8a1SJohn Marino * the code are not to be removed.
18f5b1c8a1SJohn Marino * If this package is used in a product, Eric Young should be given attribution
19f5b1c8a1SJohn Marino * as the author of the parts of the library used.
20f5b1c8a1SJohn Marino * This can be in the form of a textual message at program startup or
21f5b1c8a1SJohn Marino * in documentation (online or textual) provided with the package.
22f5b1c8a1SJohn Marino *
23f5b1c8a1SJohn Marino * Redistribution and use in source and binary forms, with or without
24f5b1c8a1SJohn Marino * modification, are permitted provided that the following conditions
25f5b1c8a1SJohn Marino * are met:
26f5b1c8a1SJohn Marino * 1. Redistributions of source code must retain the copyright
27f5b1c8a1SJohn Marino * notice, this list of conditions and the following disclaimer.
28f5b1c8a1SJohn Marino * 2. Redistributions in binary form must reproduce the above copyright
29f5b1c8a1SJohn Marino * notice, this list of conditions and the following disclaimer in the
30f5b1c8a1SJohn Marino * documentation and/or other materials provided with the distribution.
31f5b1c8a1SJohn Marino * 3. All advertising materials mentioning features or use of this software
32f5b1c8a1SJohn Marino * must display the following acknowledgement:
33f5b1c8a1SJohn Marino * "This product includes cryptographic software written by
34f5b1c8a1SJohn Marino * Eric Young (eay@cryptsoft.com)"
35f5b1c8a1SJohn Marino * The word 'cryptographic' can be left out if the rouines from the library
36f5b1c8a1SJohn Marino * being used are not cryptographic related :-).
37f5b1c8a1SJohn Marino * 4. If you include any Windows specific code (or a derivative thereof) from
38f5b1c8a1SJohn Marino * the apps directory (application code) you must include an acknowledgement:
39f5b1c8a1SJohn Marino * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40f5b1c8a1SJohn Marino *
41f5b1c8a1SJohn Marino * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42f5b1c8a1SJohn Marino * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43f5b1c8a1SJohn Marino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44f5b1c8a1SJohn Marino * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45f5b1c8a1SJohn Marino * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46f5b1c8a1SJohn Marino * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47f5b1c8a1SJohn Marino * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48f5b1c8a1SJohn Marino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49f5b1c8a1SJohn Marino * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50f5b1c8a1SJohn Marino * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51f5b1c8a1SJohn Marino * SUCH DAMAGE.
52f5b1c8a1SJohn Marino *
53f5b1c8a1SJohn Marino * The licence and distribution terms for any publically available version or
54f5b1c8a1SJohn Marino * derivative of this code cannot be changed. i.e. this code cannot simply be
55f5b1c8a1SJohn Marino * copied and put under another distribution licence
56f5b1c8a1SJohn Marino * [including the GNU Public Licence.]
57f5b1c8a1SJohn Marino */
58f5b1c8a1SJohn Marino
59f5b1c8a1SJohn Marino #include <stdio.h>
60f5b1c8a1SJohn Marino
61f5b1c8a1SJohn Marino #include <openssl/err.h>
62f5b1c8a1SJohn Marino #include <openssl/evp.h>
63f5b1c8a1SJohn Marino #include <openssl/objects.h>
64f5b1c8a1SJohn Marino #include <openssl/x509.h>
65f5b1c8a1SJohn Marino
66*de0e0e4dSAntonio Huete Jimenez #include "evp_locl.h"
67*de0e0e4dSAntonio Huete Jimenez
68f5b1c8a1SJohn Marino int
EVP_SignFinal(EVP_MD_CTX * ctx,unsigned char * sigret,unsigned int * siglen,EVP_PKEY * pkey)69f5b1c8a1SJohn Marino EVP_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret, unsigned int *siglen,
70f5b1c8a1SJohn Marino EVP_PKEY *pkey)
71f5b1c8a1SJohn Marino {
72f5b1c8a1SJohn Marino unsigned char m[EVP_MAX_MD_SIZE];
73f5b1c8a1SJohn Marino unsigned int m_len;
74f5b1c8a1SJohn Marino EVP_MD_CTX tmp_ctx;
75f5b1c8a1SJohn Marino EVP_PKEY_CTX *pkctx = NULL;
76*de0e0e4dSAntonio Huete Jimenez size_t sltmp;
77*de0e0e4dSAntonio Huete Jimenez int ret = 0;
78f5b1c8a1SJohn Marino
79f5b1c8a1SJohn Marino *siglen = 0;
80f5b1c8a1SJohn Marino EVP_MD_CTX_init(&tmp_ctx);
81f5b1c8a1SJohn Marino if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx))
82f5b1c8a1SJohn Marino goto err;
83f5b1c8a1SJohn Marino if (!EVP_DigestFinal_ex(&tmp_ctx, &(m[0]), &m_len))
84f5b1c8a1SJohn Marino goto err;
85f5b1c8a1SJohn Marino EVP_MD_CTX_cleanup(&tmp_ctx);
86f5b1c8a1SJohn Marino
87*de0e0e4dSAntonio Huete Jimenez sltmp = (size_t)EVP_PKEY_size(pkey);
88*de0e0e4dSAntonio Huete Jimenez
89*de0e0e4dSAntonio Huete Jimenez if ((pkctx = EVP_PKEY_CTX_new(pkey, NULL)) == NULL)
90f5b1c8a1SJohn Marino goto err;
91f5b1c8a1SJohn Marino if (EVP_PKEY_sign_init(pkctx) <= 0)
92f5b1c8a1SJohn Marino goto err;
93f5b1c8a1SJohn Marino if (EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0)
94f5b1c8a1SJohn Marino goto err;
95f5b1c8a1SJohn Marino if (EVP_PKEY_sign(pkctx, sigret, &sltmp, m, m_len) <= 0)
96f5b1c8a1SJohn Marino goto err;
97f5b1c8a1SJohn Marino *siglen = sltmp;
98*de0e0e4dSAntonio Huete Jimenez
99*de0e0e4dSAntonio Huete Jimenez ret = 1;
100*de0e0e4dSAntonio Huete Jimenez
101f5b1c8a1SJohn Marino err:
102f5b1c8a1SJohn Marino EVP_PKEY_CTX_free(pkctx);
103*de0e0e4dSAntonio Huete Jimenez return ret;
104f5b1c8a1SJohn Marino }
105