[openssh.git] / md-sha256.c

/* $OpenBSD: md-sha256.c,v 1.4 2006/07/22 20:48:23 stevesk 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 <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
00146caa	1	/* $OpenBSD: md-sha256.c,v 1.4 2006/07/22 20:48:23 stevesk 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"
b1f0c612	21	#include <openssl/opensslv.h>
13ff27b7	22
b1f0c612	23	#if !defined(HAVE_EVP_SHA256) && (OPENSSL_VERSION_NUMBER >= 0x00907000L)
13ff27b7	24
f73e2ad7	25	#include <string.h>
2ff8003a	26	#include <openssl/evp.h>
2f360c89	27	#ifdef HAVE_SHA256_UPDATE
	28	# ifdef HAVE_SHA2_H
	29	# include <sha2.h>
	30	# elif defined(HAVE_CRYPTO_SHA2_H)
	31	# include <crypto/sha2.h>
	32	# endif
f73e2ad7	33	#endif
2ff8003a	34
2ff8003a	35	const EVP_MD *evp_ssh_sha256(void);
	36
	37	static int
	38	ssh_sha256_init(EVP_MD_CTX *ctxt)
	39	{
	40	SHA256_Init(ctxt->md_data);
	41	return (1);
	42	}
	43
	44	static int
	45	ssh_sha256_update(EVP_MD_CTX ctxt, const void data, unsigned long len)
	46	{
	47	SHA256_Update(ctxt->md_data, data, len);
	48	return (1);
	49	}
	50
	51	static int
	52	ssh_sha256_final(EVP_MD_CTX ctxt, unsigned char digest)
	53	{
	54	SHA256_Final(digest, ctxt->md_data);
	55	return (1);
	56	}
	57
	58	static int
	59	ssh_sha256_cleanup(EVP_MD_CTX *ctxt)
	60	{
	61	memset(ctxt->md_data, 0, sizeof(SHA256_CTX));
	62	return (1);
	63	}
	64
	65	const EVP_MD *
	66	evp_ssh_sha256(void)
	67	{
	68	static EVP_MD ssh_sha256;
	69
	70	memset(&ssh_sha256, 0, sizeof(ssh_sha256));
	71	ssh_sha256.type = NID_undef;
	72	ssh_sha256.md_size = SHA256_DIGEST_LENGTH;
	73	ssh_sha256.init = ssh_sha256_init;
	74	ssh_sha256.update = ssh_sha256_update;
	75	ssh_sha256.final = ssh_sha256_final;
	76	ssh_sha256.cleanup = ssh_sha256_cleanup;
	77	ssh_sha256.block_size = SHA256_BLOCK_LENGTH;
	78	ssh_sha256.ctx_size = sizeof(SHA256_CTX);
	79
	80	return (&ssh_sha256);
	81	}
13ff27b7	82
b1f0c612	83	#endif /* !defined(HAVE_EVP_SHA256) && (OPENSSL_VERSION_NUMBER >= 0x00907000L) */
13ff27b7	84