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87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
/* $OpenBSD: md-sha256.c,v 1.5 2006/08/03 03:34:42 deraadt Exp $ */
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/*
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* Copyright (c) 2005 Damien Miller <djm@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* EVP wrapper for SHA256 */
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#include "includes.h"
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#include <sys/types.h>
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#include <openssl/opensslv.h>
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#if !defined(HAVE_EVP_SHA256) && (OPENSSL_VERSION_NUMBER >= 0x00907000L)
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#include <string.h>
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#include <openssl/evp.h>
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#ifdef HAVE_SHA256_UPDATE
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# ifdef HAVE_SHA2_H
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# include <sha2.h>
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# elif defined(HAVE_CRYPTO_SHA2_H)
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# include <crypto/sha2.h>
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# endif
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#endif
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const EVP_MD *evp_ssh_sha256(void);
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static int
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ssh_sha256_init(EVP_MD_CTX *ctxt)
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{
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SHA256_Init(ctxt->md_data);
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return (1);
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}
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static int
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ssh_sha256_update(EVP_MD_CTX *ctxt, const void *data, unsigned long len)
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{
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SHA256_Update(ctxt->md_data, data, len);
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return (1);
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}
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static int
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ssh_sha256_final(EVP_MD_CTX *ctxt, unsigned char *digest)
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{
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SHA256_Final(digest, ctxt->md_data);
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return (1);
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}
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static int
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ssh_sha256_cleanup(EVP_MD_CTX *ctxt)
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{
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memset(ctxt->md_data, 0, sizeof(SHA256_CTX));
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return (1);
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}
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const EVP_MD *
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evp_ssh_sha256(void)
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{
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static EVP_MD ssh_sha256;
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memset(&ssh_sha256, 0, sizeof(ssh_sha256));
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ssh_sha256.type = NID_undef;
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ssh_sha256.md_size = SHA256_DIGEST_LENGTH;
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ssh_sha256.init = ssh_sha256_init;
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ssh_sha256.update = ssh_sha256_update;
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ssh_sha256.final = ssh_sha256_final;
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ssh_sha256.cleanup = ssh_sha256_cleanup;
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ssh_sha256.block_size = SHA256_BLOCK_LENGTH;
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ssh_sha256.ctx_size = sizeof(SHA256_CTX);
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return (&ssh_sha256);
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}
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#endif /* !defined(HAVE_EVP_SHA256) && (OPENSSL_VERSION_NUMBER >= 0x00907000L) */
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