[openssh.git] / md-sha256.c

/*
 * 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"

#ifndef HAVE_EVP_SHA256

#include <openssl/evp.h>

RCSID("$OpenBSD: md-sha256.c,v 1.1 2006/03/07 09:07:40 djm Exp $");

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 /* HAVE_EVP_SHA256 */
Commit	Line	Data
2ff8003a	1	/*
	2	* Copyright (c) 2005 Damien Miller <djm@openbsd.org>
	3	*
	4	* Permission to use, copy, modify, and distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	11	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	13	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	14	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15	*/
	16
	17	/* EVP wrapper for SHA256 */
	18
	19	#include "includes.h"
13ff27b7	20
	21	#ifndef HAVE_EVP_SHA256
	22
2ff8003a	23	#include <openssl/evp.h>
2ff8003a	24
	25	RCSID("$OpenBSD: md-sha256.c,v 1.1 2006/03/07 09:07:40 djm Exp $");
	26
	27	const EVP_MD *evp_ssh_sha256(void);
	28
	29	static int
	30	ssh_sha256_init(EVP_MD_CTX *ctxt)
	31	{
	32	SHA256_Init(ctxt->md_data);
	33	return (1);
	34	}
	35
	36	static int
	37	ssh_sha256_update(EVP_MD_CTX ctxt, const void data, unsigned long len)
	38	{
	39	SHA256_Update(ctxt->md_data, data, len);
	40	return (1);
	41	}
	42
	43	static int
	44	ssh_sha256_final(EVP_MD_CTX ctxt, unsigned char digest)
	45	{
	46	SHA256_Final(digest, ctxt->md_data);
	47	return (1);
	48	}
	49
	50	static int
	51	ssh_sha256_cleanup(EVP_MD_CTX *ctxt)
	52	{
	53	memset(ctxt->md_data, 0, sizeof(SHA256_CTX));
	54	return (1);
	55	}
	56
	57	const EVP_MD *
	58	evp_ssh_sha256(void)
	59	{
	60	static EVP_MD ssh_sha256;
	61
	62	memset(&ssh_sha256, 0, sizeof(ssh_sha256));
	63	ssh_sha256.type = NID_undef;
	64	ssh_sha256.md_size = SHA256_DIGEST_LENGTH;
	65	ssh_sha256.init = ssh_sha256_init;
	66	ssh_sha256.update = ssh_sha256_update;
	67	ssh_sha256.final = ssh_sha256_final;
	68	ssh_sha256.cleanup = ssh_sha256_cleanup;
	69	ssh_sha256.block_size = SHA256_BLOCK_LENGTH;
	70	ssh_sha256.ctx_size = sizeof(SHA256_CTX);
	71
	72	return (&ssh_sha256);
	73	}
13ff27b7	74
	75	#endif /* HAVE_EVP_SHA256 */
	76