[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"
#include <openssl/evp.h>
#include <sha2.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);
}
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"
	20	#include <openssl/evp.h>
	21	#include <sha2.h>
	22
	23	RCSID("$OpenBSD: md-sha256.c,v 1.1 2006/03/07 09:07:40 djm Exp $");
	24
	25	const EVP_MD *evp_ssh_sha256(void);
	26
	27	static int
	28	ssh_sha256_init(EVP_MD_CTX *ctxt)
	29	{
	30	SHA256_Init(ctxt->md_data);
	31	return (1);
	32	}
	33
	34	static int
	35	ssh_sha256_update(EVP_MD_CTX ctxt, const void data, unsigned long len)
	36	{
	37	SHA256_Update(ctxt->md_data, data, len);
	38	return (1);
	39	}
	40
	41	static int
	42	ssh_sha256_final(EVP_MD_CTX ctxt, unsigned char digest)
	43	{
	44	SHA256_Final(digest, ctxt->md_data);
	45	return (1);
	46	}
	47
	48	static int
	49	ssh_sha256_cleanup(EVP_MD_CTX *ctxt)
	50	{
	51	memset(ctxt->md_data, 0, sizeof(SHA256_CTX));
	52	return (1);
	53	}
	54
	55	const EVP_MD *
	56	evp_ssh_sha256(void)
	57	{
	58	static EVP_MD ssh_sha256;
	59
	60	memset(&ssh_sha256, 0, sizeof(ssh_sha256));
	61	ssh_sha256.type = NID_undef;
	62	ssh_sha256.md_size = SHA256_DIGEST_LENGTH;
	63	ssh_sha256.init = ssh_sha256_init;
	64	ssh_sha256.update = ssh_sha256_update;
65	ssh_sha256.final = ssh_sha256_final;
66	ssh_sha256.cleanup = ssh_sha256_cleanup;
67	ssh_sha256.block_size = SHA256_BLOCK_LENGTH;
68	ssh_sha256.ctx_size = sizeof(SHA256_CTX);
69
70	return (&ssh_sha256);
71	}