google3/third_party/grte/v5_src/glibc-2.27/crypt/sha512.c - GRTEv5 - Git at Google

 /* Functions to compute SHA512 message digest of files or memory blocks.
    according to the definition of SHA512 in FIPS 180-2.
    Copyright (C) 2007-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.

    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    The GNU C Library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */

 /* Written by Ulrich Drepper <drepper@redhat.com>, 2007.  */

 #ifdef HAVE_CONFIG_H
 # include <config.h>
 #endif

 #include <endian.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdint.h>
 #include <sys/types.h>

 #include "sha512.h"

 #if __BYTE_ORDER == __LITTLE_ENDIAN
 # ifdef _LIBC
 #  include <byteswap.h>
 #  define SWAP(n) bswap_64 (n)
 # else
 #  define SWAP(n) \
   (((n) << 56)					\
    | (((n) & 0xff00) << 40)			\
    | (((n) & 0xff0000) << 24)			\
    | (((n) & 0xff000000) << 8)			\
    | (((n) >> 8) & 0xff000000)			\
    | (((n) >> 24) & 0xff0000)			\
    | (((n) >> 40) & 0xff00)			\
    | ((n) >> 56))
 # endif
 #else
 # define SWAP(n) (n)
 #endif


 /* This array contains the bytes used to pad the buffer to the next
    64-byte boundary.  (FIPS 180-2:5.1.2)  */
 static const unsigned char fillbuf[128] = { 0x80, 0 /* , 0, 0, ...  */ };


 /* Constants for SHA512 from FIPS 180-2:4.2.3.  */
 static const uint64_t K[80] =
   {
     UINT64_C (0x428a2f98d728ae22), UINT64_C (0x7137449123ef65cd),
     UINT64_C (0xb5c0fbcfec4d3b2f), UINT64_C (0xe9b5dba58189dbbc),
     UINT64_C (0x3956c25bf348b538), UINT64_C (0x59f111f1b605d019),
     UINT64_C (0x923f82a4af194f9b), UINT64_C (0xab1c5ed5da6d8118),
     UINT64_C (0xd807aa98a3030242), UINT64_C (0x12835b0145706fbe),
     UINT64_C (0x243185be4ee4b28c), UINT64_C (0x550c7dc3d5ffb4e2),
     UINT64_C (0x72be5d74f27b896f), UINT64_C (0x80deb1fe3b1696b1),
     UINT64_C (0x9bdc06a725c71235), UINT64_C (0xc19bf174cf692694),
     UINT64_C (0xe49b69c19ef14ad2), UINT64_C (0xefbe4786384f25e3),
     UINT64_C (0x0fc19dc68b8cd5b5), UINT64_C (0x240ca1cc77ac9c65),
     UINT64_C (0x2de92c6f592b0275), UINT64_C (0x4a7484aa6ea6e483),
     UINT64_C (0x5cb0a9dcbd41fbd4), UINT64_C (0x76f988da831153b5),
     UINT64_C (0x983e5152ee66dfab), UINT64_C (0xa831c66d2db43210),
     UINT64_C (0xb00327c898fb213f), UINT64_C (0xbf597fc7beef0ee4),
     UINT64_C (0xc6e00bf33da88fc2), UINT64_C (0xd5a79147930aa725),
     UINT64_C (0x06ca6351e003826f), UINT64_C (0x142929670a0e6e70),
     UINT64_C (0x27b70a8546d22ffc), UINT64_C (0x2e1b21385c26c926),
     UINT64_C (0x4d2c6dfc5ac42aed), UINT64_C (0x53380d139d95b3df),
     UINT64_C (0x650a73548baf63de), UINT64_C (0x766a0abb3c77b2a8),
     UINT64_C (0x81c2c92e47edaee6), UINT64_C (0x92722c851482353b),
     UINT64_C (0xa2bfe8a14cf10364), UINT64_C (0xa81a664bbc423001),
     UINT64_C (0xc24b8b70d0f89791), UINT64_C (0xc76c51a30654be30),
     UINT64_C (0xd192e819d6ef5218), UINT64_C (0xd69906245565a910),
     UINT64_C (0xf40e35855771202a), UINT64_C (0x106aa07032bbd1b8),
     UINT64_C (0x19a4c116b8d2d0c8), UINT64_C (0x1e376c085141ab53),
     UINT64_C (0x2748774cdf8eeb99), UINT64_C (0x34b0bcb5e19b48a8),
     UINT64_C (0x391c0cb3c5c95a63), UINT64_C (0x4ed8aa4ae3418acb),
     UINT64_C (0x5b9cca4f7763e373), UINT64_C (0x682e6ff3d6b2b8a3),
     UINT64_C (0x748f82ee5defb2fc), UINT64_C (0x78a5636f43172f60),
     UINT64_C (0x84c87814a1f0ab72), UINT64_C (0x8cc702081a6439ec),
     UINT64_C (0x90befffa23631e28), UINT64_C (0xa4506cebde82bde9),
     UINT64_C (0xbef9a3f7b2c67915), UINT64_C (0xc67178f2e372532b),
     UINT64_C (0xca273eceea26619c), UINT64_C (0xd186b8c721c0c207),
     UINT64_C (0xeada7dd6cde0eb1e), UINT64_C (0xf57d4f7fee6ed178),
     UINT64_C (0x06f067aa72176fba), UINT64_C (0x0a637dc5a2c898a6),
     UINT64_C (0x113f9804bef90dae), UINT64_C (0x1b710b35131c471b),
     UINT64_C (0x28db77f523047d84), UINT64_C (0x32caab7b40c72493),
     UINT64_C (0x3c9ebe0a15c9bebc), UINT64_C (0x431d67c49c100d4c),
     UINT64_C (0x4cc5d4becb3e42b6), UINT64_C (0x597f299cfc657e2a),
     UINT64_C (0x5fcb6fab3ad6faec), UINT64_C (0x6c44198c4a475817)
   };

 void __sha512_process_block (const void *buffer, size_t len,
 			     struct sha512_ctx *ctx);

 /* Initialize structure containing state of computation.
    (FIPS 180-2:5.3.3)  */
 void
 __sha512_init_ctx (struct sha512_ctx *ctx)
 {
   ctx->H[0] = UINT64_C (0x6a09e667f3bcc908);
   ctx->H[1] = UINT64_C (0xbb67ae8584caa73b);
   ctx->H[2] = UINT64_C (0x3c6ef372fe94f82b);
   ctx->H[3] = UINT64_C (0xa54ff53a5f1d36f1);
   ctx->H[4] = UINT64_C (0x510e527fade682d1);
   ctx->H[5] = UINT64_C (0x9b05688c2b3e6c1f);
   ctx->H[6] = UINT64_C (0x1f83d9abfb41bd6b);
   ctx->H[7] = UINT64_C (0x5be0cd19137e2179);

   ctx->total[0] = ctx->total[1] = 0;
   ctx->buflen = 0;
 }


 /* Process the remaining bytes in the internal buffer and the usual
    prolog according to the standard and write the result to RESBUF.

    IMPORTANT: On some systems it is required that RESBUF is correctly
    aligned for a 32 bits value.  */
 void *
 __sha512_finish_ctx (struct sha512_ctx *ctx, void *resbuf)
 {
   /* Take yet unprocessed bytes into account.  */
   uint64_t bytes = ctx->buflen;
   size_t pad;

   /* Now count remaining bytes.  */
 #ifdef USE_TOTAL128
   ctx->total128 += bytes;
 #else
   ctx->total[TOTAL128_low] += bytes;
   if (ctx->total[TOTAL128_low] < bytes)
     ++ctx->total[TOTAL128_high];
 #endif

   pad = bytes >= 112 ? 128 + 112 - bytes : 112 - bytes;
   memcpy (&ctx->buffer[bytes], fillbuf, pad);

   /* Put the 128-bit file length in *bits* at the end of the buffer.  */
   ctx->buffer64[(bytes + pad + 8) / 8] = SWAP (ctx->total[TOTAL128_low] << 3);
   ctx->buffer64[(bytes + pad) / 8] = SWAP ((ctx->total[TOTAL128_high] << 3) |
 					   (ctx->total[TOTAL128_low] >> 61));

   /* Process last bytes.  */
   __sha512_process_block (ctx->buffer, bytes + pad + 16, ctx);

   /* Put result from CTX in first 64 bytes following RESBUF.  */
   for (unsigned int i = 0; i < 8; ++i)
     ((uint64_t *) resbuf)[i] = SWAP (ctx->H[i]);

   return resbuf;
 }


 void
 __sha512_process_bytes (const void *buffer, size_t len, struct sha512_ctx *ctx)
 {
   /* When we already have some bits in our internal buffer concatenate
      both inputs first.  */
   if (ctx->buflen != 0)
     {
       size_t left_over = ctx->buflen;
       size_t add = 256 - left_over > len ? len : 256 - left_over;

       memcpy (&ctx->buffer[left_over], buffer, add);
       ctx->buflen += add;

       if (ctx->buflen > 128)
 	{
 	  __sha512_process_block (ctx->buffer, ctx->buflen & ~127, ctx);

 	  ctx->buflen &= 127;
 	  /* The regions in the following copy operation cannot overlap.  */
 	  memcpy (ctx->buffer, &ctx->buffer[(left_over + add) & ~127],
 		  ctx->buflen);
 	}

       buffer = (const char *) buffer + add;
       len -= add;
     }

   /* Process available complete blocks.  */
   if (len >= 128)
     {
 #if !_STRING_ARCH_unaligned
 /* To check alignment gcc has an appropriate operator.  Other
    compilers don't.  */
 # if __GNUC__ >= 2
 #  define UNALIGNED_P(p) (((uintptr_t) p) % __alignof__ (uint64_t) != 0)
 # else
 #  define UNALIGNED_P(p) (((uintptr_t) p) % sizeof (uint64_t) != 0)
 # endif
       if (UNALIGNED_P (buffer))
 	while (len > 128)
 	  {
 	    __sha512_process_block (memcpy (ctx->buffer, buffer, 128), 128,
 				    ctx);
 	    buffer = (const char *) buffer + 128;
 	    len -= 128;
 	  }
       else
 #endif
 	{
 	  __sha512_process_block (buffer, len & ~127, ctx);
 	  buffer = (const char *) buffer + (len & ~127);
 	  len &= 127;
 	}
     }

   /* Move remaining bytes into internal buffer.  */
   if (len > 0)
     {
       size_t left_over = ctx->buflen;

       memcpy (&ctx->buffer[left_over], buffer, len);
       left_over += len;
       if (left_over >= 128)
 	{
 	  __sha512_process_block (ctx->buffer, 128, ctx);
 	  left_over -= 128;
 	  memcpy (ctx->buffer, &ctx->buffer[128], left_over);
 	}
       ctx->buflen = left_over;
     }
 }

 #include <sha512-block.c>
	/* Functions to compute SHA512 message digest of files or memory blocks.
	according to the definition of SHA512 in FIPS 180-2.
	Copyright (C) 2007-2018 Free Software Foundation, Inc.
	This file is part of the GNU C Library.

	The GNU C Library is free software; you can redistribute it and/or
	modify it under the terms of the GNU Lesser General Public
	License as published by the Free Software Foundation; either
	version 2.1 of the License, or (at your option) any later version.

	The GNU C Library is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public
	License along with the GNU C Library; if not, see
	<http://www.gnu.org/licenses/>. */

	/* Written by Ulrich Drepper <drepper@redhat.com>, 2007. */

	#ifdef HAVE_CONFIG_H
	# include <config.h>
	#endif

	#include <endian.h>
	#include <stdlib.h>
	#include <string.h>
	#include <stdint.h>
	#include <sys/types.h>

	#include "sha512.h"

	#if __BYTE_ORDER == __LITTLE_ENDIAN
	# ifdef _LIBC
	# include <byteswap.h>
	# define SWAP(n) bswap_64 (n)
	# else
	# define SWAP(n) \
	(((n) << 56) \
	\| (((n) & 0xff00) << 40) \
	\| (((n) & 0xff0000) << 24) \
	\| (((n) & 0xff000000) << 8) \
	\| (((n) >> 8) & 0xff000000) \
	\| (((n) >> 24) & 0xff0000) \
	\| (((n) >> 40) & 0xff00) \
	\| ((n) >> 56))
	# endif
	#else
	# define SWAP(n) (n)
	#endif


	/* This array contains the bytes used to pad the buffer to the next
	64-byte boundary. (FIPS 180-2:5.1.2) */
	static const unsigned char fillbuf[128] = { 0x80, 0 /* , 0, 0, ... */ };


	/* Constants for SHA512 from FIPS 180-2:4.2.3. */
	static const uint64_t K[80] =
	{
	UINT64_C (0x428a2f98d728ae22), UINT64_C (0x7137449123ef65cd),
	UINT64_C (0xb5c0fbcfec4d3b2f), UINT64_C (0xe9b5dba58189dbbc),
	UINT64_C (0x3956c25bf348b538), UINT64_C (0x59f111f1b605d019),
	UINT64_C (0x923f82a4af194f9b), UINT64_C (0xab1c5ed5da6d8118),
	UINT64_C (0xd807aa98a3030242), UINT64_C (0x12835b0145706fbe),
	UINT64_C (0x243185be4ee4b28c), UINT64_C (0x550c7dc3d5ffb4e2),
	UINT64_C (0x72be5d74f27b896f), UINT64_C (0x80deb1fe3b1696b1),
	UINT64_C (0x9bdc06a725c71235), UINT64_C (0xc19bf174cf692694),
	UINT64_C (0xe49b69c19ef14ad2), UINT64_C (0xefbe4786384f25e3),
	UINT64_C (0x0fc19dc68b8cd5b5), UINT64_C (0x240ca1cc77ac9c65),
	UINT64_C (0x2de92c6f592b0275), UINT64_C (0x4a7484aa6ea6e483),
	UINT64_C (0x5cb0a9dcbd41fbd4), UINT64_C (0x76f988da831153b5),
	UINT64_C (0x983e5152ee66dfab), UINT64_C (0xa831c66d2db43210),
	UINT64_C (0xb00327c898fb213f), UINT64_C (0xbf597fc7beef0ee4),
	UINT64_C (0xc6e00bf33da88fc2), UINT64_C (0xd5a79147930aa725),
	UINT64_C (0x06ca6351e003826f), UINT64_C (0x142929670a0e6e70),
	UINT64_C (0x27b70a8546d22ffc), UINT64_C (0x2e1b21385c26c926),
	UINT64_C (0x4d2c6dfc5ac42aed), UINT64_C (0x53380d139d95b3df),
	UINT64_C (0x650a73548baf63de), UINT64_C (0x766a0abb3c77b2a8),
	UINT64_C (0x81c2c92e47edaee6), UINT64_C (0x92722c851482353b),
	UINT64_C (0xa2bfe8a14cf10364), UINT64_C (0xa81a664bbc423001),
	UINT64_C (0xc24b8b70d0f89791), UINT64_C (0xc76c51a30654be30),
	UINT64_C (0xd192e819d6ef5218), UINT64_C (0xd69906245565a910),
	UINT64_C (0xf40e35855771202a), UINT64_C (0x106aa07032bbd1b8),
	UINT64_C (0x19a4c116b8d2d0c8), UINT64_C (0x1e376c085141ab53),
	UINT64_C (0x2748774cdf8eeb99), UINT64_C (0x34b0bcb5e19b48a8),
	UINT64_C (0x391c0cb3c5c95a63), UINT64_C (0x4ed8aa4ae3418acb),
	UINT64_C (0x5b9cca4f7763e373), UINT64_C (0x682e6ff3d6b2b8a3),
	UINT64_C (0x748f82ee5defb2fc), UINT64_C (0x78a5636f43172f60),
	UINT64_C (0x84c87814a1f0ab72), UINT64_C (0x8cc702081a6439ec),
	UINT64_C (0x90befffa23631e28), UINT64_C (0xa4506cebde82bde9),
	UINT64_C (0xbef9a3f7b2c67915), UINT64_C (0xc67178f2e372532b),
	UINT64_C (0xca273eceea26619c), UINT64_C (0xd186b8c721c0c207),
	UINT64_C (0xeada7dd6cde0eb1e), UINT64_C (0xf57d4f7fee6ed178),
	UINT64_C (0x06f067aa72176fba), UINT64_C (0x0a637dc5a2c898a6),
	UINT64_C (0x113f9804bef90dae), UINT64_C (0x1b710b35131c471b),
	UINT64_C (0x28db77f523047d84), UINT64_C (0x32caab7b40c72493),
	UINT64_C (0x3c9ebe0a15c9bebc), UINT64_C (0x431d67c49c100d4c),
	UINT64_C (0x4cc5d4becb3e42b6), UINT64_C (0x597f299cfc657e2a),
	UINT64_C (0x5fcb6fab3ad6faec), UINT64_C (0x6c44198c4a475817)
	};

	void __sha512_process_block (const void *buffer, size_t len,
	struct sha512_ctx *ctx);

	/* Initialize structure containing state of computation.
	(FIPS 180-2:5.3.3) */
	void
	__sha512_init_ctx (struct sha512_ctx *ctx)
	{
	ctx->H[0] = UINT64_C (0x6a09e667f3bcc908);
	ctx->H[1] = UINT64_C (0xbb67ae8584caa73b);
	ctx->H[2] = UINT64_C (0x3c6ef372fe94f82b);
	ctx->H[3] = UINT64_C (0xa54ff53a5f1d36f1);
	ctx->H[4] = UINT64_C (0x510e527fade682d1);
	ctx->H[5] = UINT64_C (0x9b05688c2b3e6c1f);
	ctx->H[6] = UINT64_C (0x1f83d9abfb41bd6b);
	ctx->H[7] = UINT64_C (0x5be0cd19137e2179);

	ctx->total[0] = ctx->total[1] = 0;
	ctx->buflen = 0;
	}


	/* Process the remaining bytes in the internal buffer and the usual
	prolog according to the standard and write the result to RESBUF.

	IMPORTANT: On some systems it is required that RESBUF is correctly
	aligned for a 32 bits value. */
	void *
	__sha512_finish_ctx (struct sha512_ctx ctx, void resbuf)
	{
	/* Take yet unprocessed bytes into account. */
	uint64_t bytes = ctx->buflen;
	size_t pad;

	/* Now count remaining bytes. */
	#ifdef USE_TOTAL128
	ctx->total128 += bytes;
	#else
	ctx->total[TOTAL128_low] += bytes;
	if (ctx->total[TOTAL128_low] < bytes)
	++ctx->total[TOTAL128_high];
	#endif

	pad = bytes >= 112 ? 128 + 112 - bytes : 112 - bytes;
	memcpy (&ctx->buffer[bytes], fillbuf, pad);

	/* Put the 128-bit file length in bits at the end of the buffer. */
	ctx->buffer64[(bytes + pad + 8) / 8] = SWAP (ctx->total[TOTAL128_low] << 3);
	ctx->buffer64[(bytes + pad) / 8] = SWAP ((ctx->total[TOTAL128_high] << 3) \|
	(ctx->total[TOTAL128_low] >> 61));

	/* Process last bytes. */
	__sha512_process_block (ctx->buffer, bytes + pad + 16, ctx);

	/* Put result from CTX in first 64 bytes following RESBUF. */
	for (unsigned int i = 0; i < 8; ++i)
	((uint64_t *) resbuf)[i] = SWAP (ctx->H[i]);

	return resbuf;
	}


	void
	__sha512_process_bytes (const void buffer, size_t len, struct sha512_ctx ctx)
	{
	/* When we already have some bits in our internal buffer concatenate
	both inputs first. */
	if (ctx->buflen != 0)
	{
	size_t left_over = ctx->buflen;
	size_t add = 256 - left_over > len ? len : 256 - left_over;

	memcpy (&ctx->buffer[left_over], buffer, add);
	ctx->buflen += add;

	if (ctx->buflen > 128)
	{
	__sha512_process_block (ctx->buffer, ctx->buflen & ~127, ctx);

	ctx->buflen &= 127;
	/* The regions in the following copy operation cannot overlap. */
	memcpy (ctx->buffer, &ctx->buffer[(left_over + add) & ~127],
	ctx->buflen);
	}

	buffer = (const char *) buffer + add;
	len -= add;
	}

	/* Process available complete blocks. */
	if (len >= 128)
	{
	#if !_STRING_ARCH_unaligned
	/* To check alignment gcc has an appropriate operator. Other
	compilers don't. */
	# if __GNUC__ >= 2
	# define UNALIGNED_P(p) (((uintptr_t) p) % __alignof__ (uint64_t) != 0)
	# else
	# define UNALIGNED_P(p) (((uintptr_t) p) % sizeof (uint64_t) != 0)
	# endif
	if (UNALIGNED_P (buffer))
	while (len > 128)
	{
	__sha512_process_block (memcpy (ctx->buffer, buffer, 128), 128,
	ctx);
	buffer = (const char *) buffer + 128;
	len -= 128;
	}
	else
	#endif
	{
	__sha512_process_block (buffer, len & ~127, ctx);
	buffer = (const char *) buffer + (len & ~127);
	len &= 127;
	}
	}

	/* Move remaining bytes into internal buffer. */
	if (len > 0)
	{
	size_t left_over = ctx->buflen;

	memcpy (&ctx->buffer[left_over], buffer, len);
	left_over += len;
	if (left_over >= 128)
	{
	__sha512_process_block (ctx->buffer, 128, ctx);
	left_over -= 128;
	memcpy (ctx->buffer, &ctx->buffer[128], left_over);
	}
	ctx->buflen = left_over;
	}
	}

	#include <sha512-block.c>