blob: 8c1b3b92da9b33b3d32bed4ff5d2739e7b4efe9b [file] [log] [blame]
Damien Millerd7834352006-08-05 12:39:39 +10001/* $OpenBSD: md-sha256.c,v 1.5 2006/08/03 03:34:42 deraadt Exp $ */
Damien Millera63128d2006-03-15 12:08:28 +11002/*
3 * Copyright (c) 2005 Damien Miller <djm@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/* EVP wrapper for SHA256 */
19
20#include "includes.h"
Damien Millerd7834352006-08-05 12:39:39 +100021
22#include <sys/types.h>
Tim Rice425a6882006-03-15 20:17:05 -080023#include <openssl/opensslv.h>
Damien Milleraf87af12006-03-15 13:02:28 +110024
Tim Rice425a6882006-03-15 20:17:05 -080025#if !defined(HAVE_EVP_SHA256) && (OPENSSL_VERSION_NUMBER >= 0x00907000L)
Damien Milleraf87af12006-03-15 13:02:28 +110026
Damien Miller41e364b2006-03-15 13:12:41 +110027#include <string.h>
Damien Millera63128d2006-03-15 12:08:28 +110028#include <openssl/evp.h>
Darren Tuckerc4953012006-03-16 08:14:34 +110029#ifdef HAVE_SHA256_UPDATE
30# ifdef HAVE_SHA2_H
31# include <sha2.h>
32# elif defined(HAVE_CRYPTO_SHA2_H)
33# include <crypto/sha2.h>
34# endif
Damien Miller41e364b2006-03-15 13:12:41 +110035#endif
Damien Millera63128d2006-03-15 12:08:28 +110036
Damien Millera63128d2006-03-15 12:08:28 +110037const EVP_MD *evp_ssh_sha256(void);
38
39static int
40ssh_sha256_init(EVP_MD_CTX *ctxt)
41{
42 SHA256_Init(ctxt->md_data);
43 return (1);
44}
45
46static int
47ssh_sha256_update(EVP_MD_CTX *ctxt, const void *data, unsigned long len)
48{
49 SHA256_Update(ctxt->md_data, data, len);
50 return (1);
51}
52
53static int
54ssh_sha256_final(EVP_MD_CTX *ctxt, unsigned char *digest)
55{
56 SHA256_Final(digest, ctxt->md_data);
57 return (1);
58}
59
60static int
61ssh_sha256_cleanup(EVP_MD_CTX *ctxt)
62{
63 memset(ctxt->md_data, 0, sizeof(SHA256_CTX));
64 return (1);
65}
66
67const EVP_MD *
68evp_ssh_sha256(void)
69{
70 static EVP_MD ssh_sha256;
71
72 memset(&ssh_sha256, 0, sizeof(ssh_sha256));
73 ssh_sha256.type = NID_undef;
74 ssh_sha256.md_size = SHA256_DIGEST_LENGTH;
75 ssh_sha256.init = ssh_sha256_init;
76 ssh_sha256.update = ssh_sha256_update;
77 ssh_sha256.final = ssh_sha256_final;
78 ssh_sha256.cleanup = ssh_sha256_cleanup;
79 ssh_sha256.block_size = SHA256_BLOCK_LENGTH;
80 ssh_sha256.ctx_size = sizeof(SHA256_CTX);
81
82 return (&ssh_sha256);
83}
Damien Milleraf87af12006-03-15 13:02:28 +110084
Tim Rice425a6882006-03-15 20:17:05 -080085#endif /* !defined(HAVE_EVP_SHA256) && (OPENSSL_VERSION_NUMBER >= 0x00907000L) */
Damien Milleraf87af12006-03-15 13:02:28 +110086