[openssh.git] / md-sha256.c

/* $OpenBSD: md-sha256.c,v 1.5 2006/08/03 03:34:42 deraadt Exp $ */
/*
 * Copyright (c) 2005 Damien Miller <djm@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/* EVP wrapper for SHA256 */

#include "includes.h"

#include <sys/types.h>
#include <openssl/opensslv.h>

#if !defined(HAVE_EVP_SHA256) && (OPENSSL_VERSION_NUMBER >= 0x00907000L)

#include <string.h>
#include <openssl/evp.h>
#ifdef HAVE_SHA256_UPDATE
# ifdef HAVE_SHA2_H
#  include <sha2.h>
# elif defined(HAVE_CRYPTO_SHA2_H)
#  include <crypto/sha2.h>
# endif
#endif

const EVP_MD *evp_ssh_sha256(void);

static int
ssh_sha256_init(EVP_MD_CTX *ctxt)
{
	SHA256_Init(ctxt->md_data);
	return (1);
}

static int
ssh_sha256_update(EVP_MD_CTX *ctxt, const void *data, unsigned long len)
{
	SHA256_Update(ctxt->md_data, data, len);
	return (1);
}

static int
ssh_sha256_final(EVP_MD_CTX *ctxt, unsigned char *digest)
{
	SHA256_Final(digest, ctxt->md_data);
	return (1);
}

static int
ssh_sha256_cleanup(EVP_MD_CTX *ctxt)
{
	memset(ctxt->md_data, 0, sizeof(SHA256_CTX));
	return (1);
}

const EVP_MD *
evp_ssh_sha256(void)
{
	static EVP_MD ssh_sha256;

	memset(&ssh_sha256, 0, sizeof(ssh_sha256));
	ssh_sha256.type = NID_undef;
	ssh_sha256.md_size = SHA256_DIGEST_LENGTH;
	ssh_sha256.init = ssh_sha256_init;
	ssh_sha256.update = ssh_sha256_update;
	ssh_sha256.final = ssh_sha256_final;
	ssh_sha256.cleanup = ssh_sha256_cleanup;
	ssh_sha256.block_size = SHA256_BLOCK_LENGTH;
	ssh_sha256.ctx_size = sizeof(SHA256_CTX);

	return (&ssh_sha256);
}

#endif /* !defined(HAVE_EVP_SHA256) && (OPENSSL_VERSION_NUMBER >= 0x00907000L) */
Commit	Line	Data
31652869	1	/* $OpenBSD: md-sha256.c,v 1.5 2006/08/03 03:34:42 deraadt Exp $ */
2ff8003a	2	/*
	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"
31652869	21
31652869	22	#include <sys/types.h>
b1f0c612	23	#include <openssl/opensslv.h>
13ff27b7	24
b1f0c612	25	#if !defined(HAVE_EVP_SHA256) && (OPENSSL_VERSION_NUMBER >= 0x00907000L)
13ff27b7	26
f73e2ad7	27	#include <string.h>
2ff8003a	28	#include <openssl/evp.h>
2f360c89	29	#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
f73e2ad7	35	#endif
2ff8003a	36
2ff8003a	37	const EVP_MD *evp_ssh_sha256(void);
	38
	39	static int
	40	ssh_sha256_init(EVP_MD_CTX *ctxt)
	41	{
	42	SHA256_Init(ctxt->md_data);
	43	return (1);
	44	}
	45
	46	static int
	47	ssh_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
	53	static int
	54	ssh_sha256_final(EVP_MD_CTX ctxt, unsigned char digest)
	55	{
	56	SHA256_Final(digest, ctxt->md_data);
	57	return (1);
	58	}
	59
	60	static int
	61	ssh_sha256_cleanup(EVP_MD_CTX *ctxt)
	62	{
	63	memset(ctxt->md_data, 0, sizeof(SHA256_CTX));
	64	return (1);
	65	}
	66
	67	const EVP_MD *
	68	evp_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	}
13ff27b7	84
b1f0c612	85	#endif /* !defined(HAVE_EVP_SHA256) && (OPENSSL_VERSION_NUMBER >= 0x00907000L) */
13ff27b7	86