/*

 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

 * See the COPYRIGHT file distributed with this work for additional

 * information regarding copyright ownership.

 */

/* $Id$ */

/*	$FreeBSD: src/sys/crypto/sha2/sha2.c,v 1.2.2.2 2002/03/05 08:36:47 ume Exp $	*/

/*	$KAME: sha2.c,v 1.8 2001/11/08 01:07:52 itojun Exp $	*/

/*

 * sha2.c

 *

 * Version 1.0.0beta1

 *

 * Written by Aaron D. Gifford <me@aarongifford.com>

 *

 * Copyright 2000 Aaron D. Gifford.  All rights reserved.

 *

 * 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 above 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. Neither the name of the copyright holder nor the names of contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTOR(S) ``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(S) OR CONTRIBUTOR(S) 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.

 *

 */

#include <config.h>

#include <inttypes.h>

#include <isc/assertions.h>

#include <isc/platform.h>

#include <isc/safe.h>

#include <isc/sha2.h>

#include <isc/string.h>

#include <isc/util.h>

#if PKCS11CRYPTO

#include <pk11/internal.h>

#include <pk11/pk11.h>

#endif

#if defined(ISC_PLATFORM_OPENSSLHASH) && !defined(LIBRESSL_VERSION_NUMBER)

#if OPENSSL_VERSION_NUMBER < 0x10100000L

#define EVP_MD_CTX_new() &(context->_ctx)

#define EVP_MD_CTX_free(ptr) EVP_MD_CTX_cleanup(ptr)

#define EVP_MD_CTX_reset(c) EVP_MD_CTX_cleanup(c)

#endif

void

isc_sha224_init(isc_sha224_t *context) {

	if (context == (isc_sha224_t *)0) {

		return;

	}

	context->ctx = EVP_MD_CTX_new();

	RUNTIME_CHECK(context->ctx != NULL);

	if (EVP_DigestInit(context->ctx, EVP_sha224()) != 1) {

		FATAL_ERROR(__FILE__, __LINE__, "Cannot initialize SHA224.");

	}

}

void

isc_sha224_invalidate(isc_sha224_t *context) {

	EVP_MD_CTX_free(context->ctx);

	context->ctx = NULL;

}

void

isc_sha224_update(isc_sha224_t *context, const uint8_t* data, size_t len) {

	if (len == 0U) {

		/* Calling with no data is valid - we do nothing */

		return;

	}

	/* Sanity check: */

	REQUIRE(context != (isc_sha224_t *)0);

	REQUIRE(context->ctx != (EVP_MD_CTX *)0);

	REQUIRE(data != (uint8_t*)0);

	RUNTIME_CHECK(EVP_DigestUpdate(context->ctx,

				       (const void *) data, len) == 1);

}

void

isc_sha224_final(uint8_t digest[], isc_sha224_t *context) {

	/* Sanity check: */

	REQUIRE(context != (isc_sha224_t *)0);

	REQUIRE(context->ctx != (EVP_MD_CTX *)0);

	/* If no digest buffer is passed, we don't bother doing this: */

	if (digest != (uint8_t*)0)

		RUNTIME_CHECK(EVP_DigestFinal(context->ctx,

					      digest, NULL) == 1);

	EVP_MD_CTX_free(context->ctx);

	context->ctx = NULL;

}

void

isc_sha256_init(isc_sha256_t *context) {

	if (context == (isc_sha256_t *)0) {

		return;

	}

	context->ctx = EVP_MD_CTX_new();

	RUNTIME_CHECK(context->ctx != NULL);

	if (EVP_DigestInit(context->ctx, EVP_sha256()) != 1) {

		FATAL_ERROR(__FILE__, __LINE__, "Cannot initialize SHA256.");

	}

}

void

isc_sha256_invalidate(isc_sha256_t *context) {

	EVP_MD_CTX_free(context->ctx);

	context->ctx = NULL;

}

void

isc_sha256_update(isc_sha256_t *context, const uint8_t *data, size_t len) {

	if (len == 0U) {

		/* Calling with no data is valid - we do nothing */

		return;

	}

	/* Sanity check: */

	REQUIRE(context != (isc_sha256_t *)0);

	REQUIRE(context->ctx != (EVP_MD_CTX *)0);

	REQUIRE(data != (uint8_t*)0);

	RUNTIME_CHECK(EVP_DigestUpdate(context->ctx,

				       (const void *) data, len) == 1);

}

void

isc_sha256_final(uint8_t digest[], isc_sha256_t *context) {

	/* Sanity check: */

	REQUIRE(context != (isc_sha256_t *)0);

	REQUIRE(context->ctx != (EVP_MD_CTX *)0);

	/* If no digest buffer is passed, we don't bother doing this: */

	if (digest != (uint8_t*)0)

		RUNTIME_CHECK(EVP_DigestFinal(context->ctx,

					      digest, NULL) == 1);

	EVP_MD_CTX_free(context->ctx);

	context->ctx = NULL;

}

void

isc_sha512_init(isc_sha512_t *context) {

	if (context == (isc_sha512_t *)0) {

		return;

	}

	context->ctx = EVP_MD_CTX_new();

	RUNTIME_CHECK(context->ctx != NULL);

	if (EVP_DigestInit(context->ctx, EVP_sha512()) != 1) {

		FATAL_ERROR(__FILE__, __LINE__, "Cannot initialize SHA512.");

	}

}

void

isc_sha512_invalidate(isc_sha512_t *context) {

	EVP_MD_CTX_free(context->ctx);

	context->ctx = NULL;

}

void isc_sha512_update(isc_sha512_t *context, const uint8_t *data, size_t len) {

	if (len == 0U) {

		/* Calling with no data is valid - we do nothing */

		return;

	}

	/* Sanity check: */

	REQUIRE(context != (isc_sha512_t *)0);

	REQUIRE(context->ctx != (EVP_MD_CTX *)0);

	REQUIRE(data != (uint8_t*)0);

	RUNTIME_CHECK(EVP_DigestUpdate(context->ctx,

				       (const void *) data, len) == 1);

}

void isc_sha512_final(uint8_t digest[], isc_sha512_t *context) {

	/* Sanity check: */

	REQUIRE(context != (isc_sha512_t *)0);

	REQUIRE(context->ctx != (EVP_MD_CTX *)0);

	/* If no digest buffer is passed, we don't bother doing this: */

	if (digest != (uint8_t*)0)

		RUNTIME_CHECK(EVP_DigestFinal(context->ctx,

					      digest, NULL) == 1);

	EVP_MD_CTX_free(context->ctx);

	context->ctx = NULL;

}

void

isc_sha384_init(isc_sha384_t *context) {

	if (context == (isc_sha384_t *)0) {

		return;

	}

	context->ctx = EVP_MD_CTX_new();

	RUNTIME_CHECK(context->ctx != NULL);

	if (EVP_DigestInit(context->ctx, EVP_sha384()) != 1) {

		FATAL_ERROR(__FILE__, __LINE__, "Cannot initialize SHA384.");

	}

}

void

isc_sha384_invalidate(isc_sha384_t *context) {

	EVP_MD_CTX_free(context->ctx);

	context->ctx = NULL;

}

void

isc_sha384_update(isc_sha384_t *context, const uint8_t* data, size_t len) {

	if (len == 0U) {

		/* Calling with no data is valid - we do nothing */

		return;

	}

	/* Sanity check: */

	REQUIRE(context != (isc_sha512_t *)0);

	REQUIRE(context->ctx != (EVP_MD_CTX *)0);

	REQUIRE(data != (uint8_t*)0);

	RUNTIME_CHECK(EVP_DigestUpdate(context->ctx,

				       (const void *) data, len) == 1);

}

void

isc_sha384_final(uint8_t digest[], isc_sha384_t *context) {

	/* Sanity check: */

	REQUIRE(context != (isc_sha384_t *)0);

	REQUIRE(context->ctx != (EVP_MD_CTX *)0);

	/* If no digest buffer is passed, we don't bother doing this: */

	if (digest != (uint8_t*)0)

		RUNTIME_CHECK(EVP_DigestFinal(context->ctx,

					      digest, NULL) == 1);

	EVP_MD_CTX_free(context->ctx);

	context->ctx = NULL;

}

#elif PKCS11CRYPTO

void

isc_sha224_init(isc_sha224_t *context) {

	CK_RV rv;

	CK_MECHANISM mech = { CKM_SHA224, NULL, 0 };

	if (context == (isc_sha224_t *)0) {

		return;

	}

	RUNTIME_CHECK(pk11_get_session(context, OP_DIGEST, true, false,

				       false, NULL, 0) == ISC_R_SUCCESS);

	PK11_FATALCHECK(pkcs_C_DigestInit, (context->session, &mech));

}

void

isc_sha224_invalidate(isc_sha224_t *context) {

	CK_BYTE garbage[ISC_SHA224_DIGESTLENGTH];

	CK_ULONG len = ISC_SHA224_DIGESTLENGTH;

	if (context->handle == NULL)

		return;

	(void) pkcs_C_DigestFinal(context->session, garbage, &len;;

	isc_safe_memwipe(garbage, sizeof(garbage));

	pk11_return_session(context);

}

void

isc_sha224_update(isc_sha224_t *context, const uint8_t* data, size_t len) {

	CK_RV rv;

	CK_BYTE_PTR pPart;

	if (len == 0U) {

		/* Calling with no data is valid - we do nothing */

		return;

	}

	/* Sanity check: */

	REQUIRE(context != (isc_sha224_t *)0 && data != (uint8_t*)0);

	DE_CONST(data, pPart);

	PK11_FATALCHECK(pkcs_C_DigestUpdate,

			(context->session, pPart, (CK_ULONG) len));

}

void

isc_sha224_final(uint8_t digest[], isc_sha224_t *context) {

	CK_RV rv;

	CK_ULONG len = ISC_SHA224_DIGESTLENGTH;

	/* Sanity check: */

	REQUIRE(context != (isc_sha224_t *)0);

	/* If no digest buffer is passed, we don't bother doing this: */

	if (digest != (uint8_t*)0) {

		PK11_FATALCHECK(pkcs_C_DigestFinal,

				(context->session,

				 (CK_BYTE_PTR) digest,

				 &len));

	} else {

		CK_BYTE garbage[ISC_SHA224_DIGESTLENGTH];

		(void) pkcs_C_DigestFinal(context->session, garbage, &len;;

		isc_safe_memwipe(garbage, sizeof(garbage));

	}

	pk11_return_session(context);

}

void

isc_sha256_init(isc_sha256_t *context) {

	CK_RV rv;

	CK_MECHANISM mech = { CKM_SHA256, NULL, 0 };

	if (context == (isc_sha256_t *)0) {

		return;

	}

	RUNTIME_CHECK(pk11_get_session(context, OP_DIGEST, true, false,

				       false, NULL, 0) == ISC_R_SUCCESS);

	PK11_FATALCHECK(pkcs_C_DigestInit, (context->session, &mech));

}

void

isc_sha256_invalidate(isc_sha256_t *context) {

	CK_BYTE garbage[ISC_SHA256_DIGESTLENGTH];

	CK_ULONG len = ISC_SHA256_DIGESTLENGTH;

	if (context->handle == NULL)

		return;

	(void) pkcs_C_DigestFinal(context->session, garbage, &len;;

	isc_safe_memwipe(garbage, sizeof(garbage));

	pk11_return_session(context);

}

void

isc_sha256_update(isc_sha256_t *context, const uint8_t* data, size_t len) {

	CK_RV rv;

	CK_BYTE_PTR pPart;

	if (len == 0U) {

		/* Calling with no data is valid - we do nothing */

		return;

	}

	/* Sanity check: */

	REQUIRE(context != (isc_sha256_t *)0 && data != (uint8_t*)0);

	DE_CONST(data, pPart);

	PK11_FATALCHECK(pkcs_C_DigestUpdate,

			(context->session, pPart, (CK_ULONG) len));

}

void

isc_sha256_final(uint8_t digest[], isc_sha256_t *context) {

	CK_RV rv;

	CK_ULONG len = ISC_SHA256_DIGESTLENGTH;

	/* Sanity check: */

	REQUIRE(context != (isc_sha256_t *)0);

	/* If no digest buffer is passed, we don't bother doing this: */

	if (digest != (uint8_t*)0) {

		PK11_FATALCHECK(pkcs_C_DigestFinal,

				(context->session,

				 (CK_BYTE_PTR) digest,

				 &len));

	} else {

		CK_BYTE garbage[ISC_SHA256_DIGESTLENGTH];

		(void) pkcs_C_DigestFinal(context->session, garbage, &len;;

		isc_safe_memwipe(garbage, sizeof(garbage));

	}

	pk11_return_session(context);

}

void

isc_sha512_init(isc_sha512_t *context) {

	CK_RV rv;

	CK_MECHANISM mech = { CKM_SHA512, NULL, 0 };

	if (context == (isc_sha512_t *)0) {

		return;

	}

	RUNTIME_CHECK(pk11_get_session(context, OP_DIGEST, true, false,

				       false, NULL, 0) == ISC_R_SUCCESS);

	PK11_FATALCHECK(pkcs_C_DigestInit, (context->session, &mech));

}

void

isc_sha512_invalidate(isc_sha512_t *context) {

	CK_BYTE garbage[ISC_SHA512_DIGESTLENGTH];

	CK_ULONG len = ISC_SHA512_DIGESTLENGTH;

	if (context->handle == NULL)

		return;

	(void) pkcs_C_DigestFinal(context->session, garbage, &len;;

	isc_safe_memwipe(garbage, sizeof(garbage));

	pk11_return_session(context);

}

void

isc_sha512_update(isc_sha512_t *context, const uint8_t* data, size_t len) {

	CK_RV rv;

	CK_BYTE_PTR pPart;

	if (len == 0U) {

		/* Calling with no data is valid - we do nothing */

		return;

	}

	/* Sanity check: */

	REQUIRE(context != (isc_sha512_t *)0 && data != (uint8_t*)0);

	DE_CONST(data, pPart);

	PK11_FATALCHECK(pkcs_C_DigestUpdate,

			(context->session, pPart, (CK_ULONG) len));

}

void

isc_sha512_final(uint8_t digest[], isc_sha512_t *context) {

	CK_RV rv;

	CK_ULONG len = ISC_SHA512_DIGESTLENGTH;

	/* Sanity check: */

	REQUIRE(context != (isc_sha512_t *)0);

	/* If no digest buffer is passed, we don't bother doing this: */

	if (digest != (uint8_t*)0) {

		PK11_FATALCHECK(pkcs_C_DigestFinal,

				(context->session,

				 (CK_BYTE_PTR) digest,

				 &len));

	} else {

		CK_BYTE garbage[ISC_SHA512_DIGESTLENGTH];

		(void) pkcs_C_DigestFinal(context->session, garbage, &len;;

		isc_safe_memwipe(garbage, sizeof(garbage));

	}

	pk11_return_session(context);

}

void

isc_sha384_init(isc_sha384_t *context) {

	CK_RV rv;

	CK_MECHANISM mech = { CKM_SHA384, NULL, 0 };

	if (context == (isc_sha384_t *)0) {

		return;

	}

	RUNTIME_CHECK(pk11_get_session(context, OP_DIGEST, true, false,

				       false, NULL, 0) == ISC_R_SUCCESS);

	PK11_FATALCHECK(pkcs_C_DigestInit, (context->session, &mech));

}

void

isc_sha384_invalidate(isc_sha384_t *context) {

	CK_BYTE garbage[ISC_SHA384_DIGESTLENGTH];

	CK_ULONG len = ISC_SHA384_DIGESTLENGTH;

	if (context->handle == NULL)

		return;

	(void) pkcs_C_DigestFinal(context->session, garbage, &len;;

	isc_safe_memwipe(garbage, sizeof(garbage));

	pk11_return_session(context);

}

void

isc_sha384_update(isc_sha384_t *context, const uint8_t* data, size_t len) {

	CK_RV rv;

	CK_BYTE_PTR pPart;

	if (len == 0U) {

		/* Calling with no data is valid - we do nothing */

		return;

	}

	/* Sanity check: */

	REQUIRE(context != (isc_sha384_t *)0 && data != (uint8_t*)0);

	DE_CONST(data, pPart);

	PK11_FATALCHECK(pkcs_C_DigestUpdate,

			(context->session, pPart, (CK_ULONG) len));

}

void

isc_sha384_final(uint8_t digest[], isc_sha384_t *context) {

	CK_RV rv;

	CK_ULONG len = ISC_SHA384_DIGESTLENGTH;

	/* Sanity check: */

	REQUIRE(context != (isc_sha384_t *)0);

	/* If no digest buffer is passed, we don't bother doing this: */

	if (digest != (uint8_t*)0) {

		PK11_FATALCHECK(pkcs_C_DigestFinal,

				(context->session,

				 (CK_BYTE_PTR) digest,

				 &len));

	} else {

		CK_BYTE garbage[ISC_SHA384_DIGESTLENGTH];

		(void) pkcs_C_DigestFinal(context->session, garbage, &len;;

		isc_safe_memwipe(garbage, sizeof(garbage));

	}

	pk11_return_session(context);

}

#else

/*

 * UNROLLED TRANSFORM LOOP NOTE:

 * You can define SHA2_UNROLL_TRANSFORM to use the unrolled transform

 * loop version for the hash transform rounds (defined using macros

 * later in this file).  Either define on the command line, for example:

 *

 *   cc -DISC_SHA2_UNROLL_TRANSFORM -o sha2 sha2.c sha2prog.c

 *

 * or define below:

 *

 *   \#define ISC_SHA2_UNROLL_TRANSFORM

 *

 */

/*** SHA-256/384/512 Machine Architecture Definitions *****************/

/*

 * BYTE_ORDER NOTE:

 *

 * Please make sure that your system defines BYTE_ORDER.  If your

 * architecture is little-endian, make sure it also defines

 * LITTLE_ENDIAN and that the two (BYTE_ORDER and LITTLE_ENDIAN) are

 * equivalent.

 *

 * If your system does not define the above, then you can do so by

 * hand like this:

 *

 *   \#define LITTLE_ENDIAN 1234

 *   \#define BIG_ENDIAN    4321

 *

 * And for little-endian machines, add:

 *

 *   \#define BYTE_ORDER LITTLE_ENDIAN

 *

 * Or for big-endian machines:

 *

 *   \#define BYTE_ORDER BIG_ENDIAN

 *

 * The FreeBSD machine this was written on defines BYTE_ORDER

 * appropriately by including <sys/types.h> (which in turn includes

 * <machine/endian.h> where the appropriate definitions are actually

 * made).

 */

#if !defined(BYTE_ORDER) || (BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != BIG_ENDIAN)

#ifndef BYTE_ORDER

#ifndef BIG_ENDIAN

#define BIG_ENDIAN 4321

#endif

#ifndef LITTLE_ENDIAN

#define LITTLE_ENDIAN 1234

#endif

#ifdef WORDS_BIGENDIAN

#define BYTE_ORDER BIG_ENDIAN

#else

#define BYTE_ORDER LITTLE_ENDIAN

#endif

#else

#error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN

#endif

#endif

/*** SHA-256/384/512 Various Length Definitions ***********************/

/* NOTE: Most of these are in sha2.h */

#define ISC_SHA256_SHORT_BLOCK_LENGTH	(ISC_SHA256_BLOCK_LENGTH - 8)

#define ISC_SHA384_SHORT_BLOCK_LENGTH	(ISC_SHA384_BLOCK_LENGTH - 16)

#define ISC_SHA512_SHORT_BLOCK_LENGTH	(ISC_SHA512_BLOCK_LENGTH - 16)

/*** ENDIAN REVERSAL MACROS *******************************************/

#if BYTE_ORDER == LITTLE_ENDIAN

#define REVERSE32(w,x)	{ \

	uint32_t tmp = (w); \

	tmp = (tmp >> 16) | (tmp << 16); \

	(x) = ((tmp & 0xff00ff00UL) >> 8) | ((tmp & 0x00ff00ffUL) << 8); \

}

#ifdef WIN32

#define REVERSE64(w,x)	{ \

	uint64_t tmp = (w); \

	tmp = (tmp >> 32) | (tmp << 32); \

	tmp = ((tmp & 0xff00ff00ff00ff00UL) >> 8) | \

	      ((tmp & 0x00ff00ff00ff00ffUL) << 8); \

	(x) = ((tmp & 0xffff0000ffff0000UL) >> 16) | \

	      ((tmp & 0x0000ffff0000ffffUL) << 16); \

}

#else

#define REVERSE64(w,x)	{ \

	uint64_t tmp = (w); \

	tmp = (tmp >> 32) | (tmp << 32); \

	tmp = ((tmp & 0xff00ff00ff00ff00ULL) >> 8) | \

	      ((tmp & 0x00ff00ff00ff00ffULL) << 8); \

	(x) = ((tmp & 0xffff0000ffff0000ULL) >> 16) | \

	      ((tmp & 0x0000ffff0000ffffULL) << 16); \

}

#endif

#endif /* BYTE_ORDER == LITTLE_ENDIAN */

/*

 * Macro for incrementally adding the unsigned 64-bit integer n to the

 * unsigned 128-bit integer (represented using a two-element array of

 * 64-bit words):

 */

#define ADDINC128(w,n)	{ \

	(w)[0] += (uint64_t)(n); \

	if ((w)[0] < (n)) { \

		(w)[1]++; \

	} \

}

/*** THE SIX LOGICAL FUNCTIONS ****************************************/

/*

 * Bit shifting and rotation (used by the six SHA-XYZ logical functions:

 *

 *   NOTE:  The naming of R and S appears backwards here (R is a SHIFT and

 *   S is a ROTATION) because the SHA-256/384/512 description document

 *   (see http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf) uses this

 *   same "backwards" definition.

 */

/* Shift-right (used in SHA-256, SHA-384, and SHA-512): */

#define R(b,x) 		((x) >> (b))

/* 32-bit Rotate-right (used in SHA-256): */

#define S32(b,x)	(((x) >> (b)) | ((x) << (32 - (b))))

/* 64-bit Rotate-right (used in SHA-384 and SHA-512): */

#define S64(b,x)	(((x) >> (b)) | ((x) << (64 - (b))))

/* Two of six logical functions used in SHA-256, SHA-384, and SHA-512: */

#define Ch(x,y,z)	(((x) & (y)) ^ ((~(x)) & (z)))

#define Maj(x,y,z)	(((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))

/* Four of six logical functions used in SHA-256: */

#define Sigma0_256(x)	(S32(2,  (x)) ^ S32(13, (x)) ^ S32(22, (x)))

#define Sigma1_256(x)	(S32(6,  (x)) ^ S32(11, (x)) ^ S32(25, (x)))

#define sigma0_256(x)	(S32(7,  (x)) ^ S32(18, (x)) ^ R(3 ,   (x)))

#define sigma1_256(x)	(S32(17, (x)) ^ S32(19, (x)) ^ R(10,   (x)))

/* Four of six logical functions used in SHA-384 and SHA-512: */

#define Sigma0_512(x)	(S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x)))

#define Sigma1_512(x)	(S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x)))

#define sigma0_512(x)	(S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7,   (x)))

#define sigma1_512(x)	(S64(19, (x)) ^ S64(61, (x)) ^ R( 6,   (x)))

/*** INTERNAL FUNCTION PROTOTYPES *************************************/

/* NOTE: These should not be accessed directly from outside this

 * library -- they are intended for private internal visibility/use

 * only.

 */

void isc_sha512_last(isc_sha512_t *);

void isc_sha256_transform(isc_sha256_t *, const uint32_t*);

void isc_sha512_transform(isc_sha512_t *, const uint64_t*);

/*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/

/* Hash constant words K for SHA-224 and SHA-256: */

static const uint32_t K256[64] = {

	0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,

	0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,

	0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,

	0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,

	0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,

	0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,

	0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,

	0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,

	0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,

	0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,

	0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,

	0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,

	0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,

	0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,

	0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,

	0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL

};

/* Initial hash value H for SHA-224: */

static const uint32_t sha224_initial_hash_value[8] = {

	0xc1059ed8UL,

	0x367cd507UL,

	0x3070dd17UL,

	0xf70e5939UL,

	0xffc00b31UL,

	0x68581511UL,

	0x64f98fa7UL,

	0xbefa4fa4UL

};

/* Initial hash value H for SHA-256: */

static const uint32_t sha256_initial_hash_value[8] = {

	0x6a09e667UL,

	0xbb67ae85UL,

	0x3c6ef372UL,

	0xa54ff53aUL,

	0x510e527fUL,

	0x9b05688cUL,

	0x1f83d9abUL,

	0x5be0cd19UL

};

#ifdef WIN32

/* Hash constant words K for SHA-384 and SHA-512: */

static const uint64_t K512[80] = {

	0x428a2f98d728ae22UL, 0x7137449123ef65cdUL,

	0xb5c0fbcfec4d3b2fUL, 0xe9b5dba58189dbbcUL,

	0x3956c25bf348b538UL, 0x59f111f1b605d019UL,

	0x923f82a4af194f9bUL, 0xab1c5ed5da6d8118UL,

	0xd807aa98a3030242UL, 0x12835b0145706fbeUL,

	0x243185be4ee4b28cUL, 0x550c7dc3d5ffb4e2UL,

	0x72be5d74f27b896fUL, 0x80deb1fe3b1696b1UL,

	0x9bdc06a725c71235UL, 0xc19bf174cf692694UL,

	0xe49b69c19ef14ad2UL, 0xefbe4786384f25e3UL,

	0x0fc19dc68b8cd5b5UL, 0x240ca1cc77ac9c65UL,

	0x2de92c6f592b0275UL, 0x4a7484aa6ea6e483UL,

	0x5cb0a9dcbd41fbd4UL, 0x76f988da831153b5UL,

	0x983e5152ee66dfabUL, 0xa831c66d2db43210UL,

	0xb00327c898fb213fUL, 0xbf597fc7beef0ee4UL,

	0xc6e00bf33da88fc2UL, 0xd5a79147930aa725UL,

	0x06ca6351e003826fUL, 0x142929670a0e6e70UL,

	0x27b70a8546d22ffcUL, 0x2e1b21385c26c926UL,

	0x4d2c6dfc5ac42aedUL, 0x53380d139d95b3dfUL,

	0x650a73548baf63deUL, 0x766a0abb3c77b2a8UL,

	0x81c2c92e47edaee6UL, 0x92722c851482353bUL,

	0xa2bfe8a14cf10364UL, 0xa81a664bbc423001UL,

	0xc24b8b70d0f89791UL, 0xc76c51a30654be30UL,

	0xd192e819d6ef5218UL, 0xd69906245565a910UL,

	0xf40e35855771202aUL, 0x106aa07032bbd1b8UL,

	0x19a4c116b8d2d0c8UL, 0x1e376c085141ab53UL,

	0x2748774cdf8eeb99UL, 0x34b0bcb5e19b48a8UL,

	0x391c0cb3c5c95a63UL, 0x4ed8aa4ae3418acbUL,

	0x5b9cca4f7763e373UL, 0x682e6ff3d6b2b8a3UL,

	0x748f82ee5defb2fcUL, 0x78a5636f43172f60UL,

	0x84c87814a1f0ab72UL, 0x8cc702081a6439ecUL,

	0x90befffa23631e28UL, 0xa4506cebde82bde9UL,

	0xbef9a3f7b2c67915UL, 0xc67178f2e372532bUL,

	0xca273eceea26619cUL, 0xd186b8c721c0c207UL,

	0xeada7dd6cde0eb1eUL, 0xf57d4f7fee6ed178UL,

	0x06f067aa72176fbaUL, 0x0a637dc5a2c898a6UL,

	0x113f9804bef90daeUL, 0x1b710b35131c471bUL,

	0x28db77f523047d84UL, 0x32caab7b40c72493UL,

	0x3c9ebe0a15c9bebcUL, 0x431d67c49c100d4cUL,

	0x4cc5d4becb3e42b6UL, 0x597f299cfc657e2aUL,

	0x5fcb6fab3ad6faecUL, 0x6c44198c4a475817UL

};

/* Initial hash value H for SHA-384: */

static const uint64_t sha384_initial_hash_value[8] = {

	0xcbbb9d5dc1059ed8UL,

	0x629a292a367cd507UL,

	0x9159015a3070dd17UL,

	0x152fecd8f70e5939UL,

	0x67332667ffc00b31UL,

	0x8eb44a8768581511UL,

	0xdb0c2e0d64f98fa7UL,

	0x47b5481dbefa4fa4UL

};

/* Initial hash value H for SHA-512: */

static const uint64_t sha512_initial_hash_value[8] = {

	0x6a09e667f3bcc908U,

	0xbb67ae8584caa73bUL,

	0x3c6ef372fe94f82bUL,

	0xa54ff53a5f1d36f1UL,

	0x510e527fade682d1UL,

	0x9b05688c2b3e6c1fUL,

	0x1f83d9abfb41bd6bUL,

	0x5be0cd19137e2179UL

};

#else

/* Hash constant words K for SHA-384 and SHA-512: */

static const uint64_t K512[80] = {

	0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,

	0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,

	0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,

	0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,

	0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,

	0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,

	0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,

	0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,

	0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,

	0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,

	0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,

	0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,

	0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,

	0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,

	0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,

	0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,

	0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,

	0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,

	0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,

	0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,

	0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,

	0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,

	0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,

	0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,

	0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,

	0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,

	0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,

	0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,

	0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,

	0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,

	0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,

	0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,

	0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,

	0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,

	0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,

	0x113f9804bef90daeULL, 0x1b710b35131c471bULL,

	0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,

	0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,

	0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,

	0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL

};

/* Initial hash value H for SHA-384: */

static const uint64_t sha384_initial_hash_value[8] = {

	0xcbbb9d5dc1059ed8ULL,

	0x629a292a367cd507ULL,

	0x9159015a3070dd17ULL,

	0x152fecd8f70e5939ULL,

	0x67332667ffc00b31ULL,

	0x8eb44a8768581511ULL,

	0xdb0c2e0d64f98fa7ULL,

	0x47b5481dbefa4fa4ULL

};

/* Initial hash value H for SHA-512: */

static const uint64_t sha512_initial_hash_value[8] = {

	0x6a09e667f3bcc908ULL,

	0xbb67ae8584caa73bULL,

	0x3c6ef372fe94f82bULL,

	0xa54ff53a5f1d36f1ULL,

	0x510e527fade682d1ULL,

	0x9b05688c2b3e6c1fULL,

	0x1f83d9abfb41bd6bULL,

	0x5be0cd19137e2179ULL

};

#endif

/*** SHA-224: *********************************************************/

void

isc_sha224_init(isc_sha224_t *context) {

	if (context == (isc_sha256_t *)0) {

		return;

	}

	memmove(context->state, sha224_initial_hash_value,

		ISC_SHA256_DIGESTLENGTH);

	memset(context->buffer, 0, ISC_SHA256_BLOCK_LENGTH);

	context->bitcount = 0;

}

void

isc_sha224_invalidate(isc_sha224_t *context) {