/* $OpenBSD: m_sha1.c,v 1.19 2022/01/14 08:38:06 tb Exp $ */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 *

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 *

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 *

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

#include <stdio.h>

#include <openssl/opensslconf.h>

#ifndef OPENSSL_NO_SHA

#include <openssl/evp.h>

#include <openssl/objects.h>

#include <openssl/sha.h>

#ifndef OPENSSL_NO_RSA

#include <openssl/rsa.h>

#endif

#include "evp_locl.h"

static int

init(EVP_MD_CTX *ctx)

{

  return SHA1_Init(ctx->md_data);

}

static int

update(EVP_MD_CTX *ctx, const void *data, size_t count)

{

  return SHA1_Update(ctx->md_data, data, count);

}

static int

final(EVP_MD_CTX *ctx, unsigned char *md)

{

  return SHA1_Final(md, ctx->md_data);

}

static const EVP_MD sha1_md = {

  .type = NID_sha1,

  .pkey_type = NID_sha1WithRSAEncryption,

  .md_size = SHA_DIGEST_LENGTH,

  .flags = EVP_MD_FLAG_DIGALGID_ABSENT,

  .init = init,

  .update = update,

  .final = final,

  .copy = NULL,

  .cleanup = NULL,

  .block_size = SHA_CBLOCK,

  .ctx_size = sizeof(EVP_MD *) + sizeof(SHA_CTX),

};

const EVP_MD *

EVP_sha1(void)

{

  return (&sha1_md);

}

#endif

#ifndef OPENSSL_NO_SHA256

static int

init224(EVP_MD_CTX *ctx)

{

  return SHA224_Init(ctx->md_data);

}

static int

init256(EVP_MD_CTX *ctx)

{

  return SHA256_Init(ctx->md_data);

}

/*

 * Even though there're separate SHA224_[Update|Final], we call

 * SHA256 functions even in SHA224 context. This is what happens

 * there anyway, so we can spare few CPU cycles:-)

 */

static int

update256(EVP_MD_CTX *ctx, const void *data, size_t count)

{

  return SHA256_Update(ctx->md_data, data, count);

}

static int

final256(EVP_MD_CTX *ctx, unsigned char *md)

{

  return SHA256_Final(md, ctx->md_data);

}

static const EVP_MD sha224_md = {

  .type = NID_sha224,

  .pkey_type = NID_sha224WithRSAEncryption,

  .md_size = SHA224_DIGEST_LENGTH,

  .flags = EVP_MD_FLAG_DIGALGID_ABSENT,

  .init = init224,

  .update = update256,

  .final = final256,

  .copy = NULL,

  .cleanup = NULL,

  .block_size = SHA256_CBLOCK,

  .ctx_size = sizeof(EVP_MD *) + sizeof(SHA256_CTX),

};

const EVP_MD *

EVP_sha224(void)

{

  return (&sha224_md);

}

static const EVP_MD sha256_md = {

  .type = NID_sha256,

  .pkey_type = NID_sha256WithRSAEncryption,

  .md_size = SHA256_DIGEST_LENGTH,

  .flags = EVP_MD_FLAG_DIGALGID_ABSENT,

  .init = init256,

  .update = update256,

  .final = final256,

  .copy = NULL,

  .cleanup = NULL,

  .block_size = SHA256_CBLOCK,

  .ctx_size = sizeof(EVP_MD *) + sizeof(SHA256_CTX),

};

const EVP_MD *

EVP_sha256(void)

{

  return (&sha256_md);

}

#endif  /* ifndef OPENSSL_NO_SHA256 */

#ifndef OPENSSL_NO_SHA512

static int

init384(EVP_MD_CTX *ctx)

{

  return SHA384_Init(ctx->md_data);

}

static int

init512(EVP_MD_CTX *ctx)

{

  return SHA512_Init(ctx->md_data);

}

/* See comment in SHA224/256 section */

static int

update512(EVP_MD_CTX *ctx, const void *data, size_t count)

{

  return SHA512_Update(ctx->md_data, data, count);

}

static int

final512(EVP_MD_CTX *ctx, unsigned char *md)

{

  return SHA512_Final(md, ctx->md_data);

}

static const EVP_MD sha384_md = {

  .type = NID_sha384,

  .pkey_type = NID_sha384WithRSAEncryption,

  .md_size = SHA384_DIGEST_LENGTH,

  .flags = EVP_MD_FLAG_DIGALGID_ABSENT,

  .init = init384,

  .update = update512,

  .final = final512,

  .copy = NULL,

  .cleanup = NULL,

  .block_size = SHA512_CBLOCK,

  .ctx_size = sizeof(EVP_MD *) + sizeof(SHA512_CTX),

};

const EVP_MD *

EVP_sha384(void)

{

  return (&sha384_md);

}

static const EVP_MD sha512_md = {

  .type = NID_sha512,

  .pkey_type = NID_sha512WithRSAEncryption,

  .md_size = SHA512_DIGEST_LENGTH,

  .flags = EVP_MD_FLAG_DIGALGID_ABSENT,

  .init = init512,

  .update = update512,

  .final = final512,

  .copy = NULL,

  .cleanup = NULL,

  .block_size = SHA512_CBLOCK,

  .ctx_size = sizeof(EVP_MD *) + sizeof(SHA512_CTX),

};

const EVP_MD *

EVP_sha512(void)

{

  return (&sha512_md);

}

#endif  /* ifndef OPENSSL_NO_SHA512 */