lib/libavb/avb_sha512.c - manifest_repos/u-boot - Git at Google

 /* SHA-256 and SHA-512 implementation based on code by Oliver Gay
  * <olivier.gay@a3.epfl.ch> under a BSD-style license. See below.
  */

 /*
  * FIPS 180-2 SHA-224/256/384/512 implementation
  * Last update: 02/02/2007
  * Issue date:  04/30/2005
  *
  * Copyright (C) 2005, 2007 Olivier Gay <olivier.gay@a3.epfl.ch>
  * 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 project nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``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 PROJECT 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.
  */

 #include "avb_sha.h"

 #define SHFR(x, n) (x >> n)
 #define ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
 #define ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
 #define CH(x, y, z) ((x & y) ^ (~x & z))
 #define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))

 #define SHA512_F1(x) (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39))
 #define SHA512_F2(x) (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41))
 #define SHA512_F3(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ SHFR(x, 7))
 #define SHA512_F4(x) (ROTR(x, 19) ^ ROTR(x, 61) ^ SHFR(x, 6))

 #define UNPACK32(x, str)                 \
   {                                      \
     *((str) + 3) = (uint8_t)((x));       \
     *((str) + 2) = (uint8_t)((x) >> 8);  \
     *((str) + 1) = (uint8_t)((x) >> 16); \
     *((str) + 0) = (uint8_t)((x) >> 24); \
   }

 #define UNPACK64(x, str)                         \
   {                                              \
     *((str) + 7) = (uint8_t)x;                   \
     *((str) + 6) = (uint8_t)((uint64_t)x >> 8);  \
     *((str) + 5) = (uint8_t)((uint64_t)x >> 16); \
     *((str) + 4) = (uint8_t)((uint64_t)x >> 24); \
     *((str) + 3) = (uint8_t)((uint64_t)x >> 32); \
     *((str) + 2) = (uint8_t)((uint64_t)x >> 40); \
     *((str) + 1) = (uint8_t)((uint64_t)x >> 48); \
     *((str) + 0) = (uint8_t)((uint64_t)x >> 56); \
   }

 #define PACK64(str, x)                                                        \
   {                                                                           \
     *(x) =                                                                    \
         ((uint64_t) * ((str) + 7)) | ((uint64_t) * ((str) + 6) << 8) |        \
         ((uint64_t) * ((str) + 5) << 16) | ((uint64_t) * ((str) + 4) << 24) | \
         ((uint64_t) * ((str) + 3) << 32) | ((uint64_t) * ((str) + 2) << 40) | \
         ((uint64_t) * ((str) + 1) << 48) | ((uint64_t) * ((str) + 0) << 56);  \
   }

 /* Macros used for loops unrolling */

 #define SHA512_SCR(i) \
   { w[i] = SHA512_F4(w[i - 2]) + w[i - 7] + SHA512_F3(w[i - 15]) + w[i - 16]; }

 #define SHA512_EXP(a, b, c, d, e, f, g, h, j)                               \
   {                                                                         \
     t1 = wv[h] + SHA512_F2(wv[e]) + CH(wv[e], wv[f], wv[g]) + sha512_k[j] + \
          w[j];                                                              \
     t2 = SHA512_F1(wv[a]) + MAJ(wv[a], wv[b], wv[c]);                       \
     wv[d] += t1;                                                            \
     wv[h] = t1 + t2;                                                        \
   }

 static const uint64_t sha512_h0[8] = {0x6a09e667f3bcc908ULL,
                                       0xbb67ae8584caa73bULL,
                                       0x3c6ef372fe94f82bULL,
                                       0xa54ff53a5f1d36f1ULL,
                                       0x510e527fade682d1ULL,
                                       0x9b05688c2b3e6c1fULL,
                                       0x1f83d9abfb41bd6bULL,
                                       0x5be0cd19137e2179ULL};

 static const uint64_t sha512_k[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};

 /* SHA-512 implementation */

 void avb_sha512_init(AvbSHA512Ctx* ctx) {
 #ifdef UNROLL_LOOPS_SHA512
   ctx->h[0] = sha512_h0[0];
   ctx->h[1] = sha512_h0[1];
   ctx->h[2] = sha512_h0[2];
   ctx->h[3] = sha512_h0[3];
   ctx->h[4] = sha512_h0[4];
   ctx->h[5] = sha512_h0[5];
   ctx->h[6] = sha512_h0[6];
   ctx->h[7] = sha512_h0[7];
 #else
   int i;

   for (i = 0; i < 8; i++)
     ctx->h[i] = sha512_h0[i];
 #endif /* UNROLL_LOOPS_SHA512 */

   ctx->len = 0;
   ctx->tot_len = 0;
 }

 static void SHA512_transform(AvbSHA512Ctx* ctx,
                              const uint8_t* message,
                              unsigned int block_nb) {
   uint64_t w[80];
   uint64_t wv[8];
   uint64_t t1, t2;
   const uint8_t* sub_block;
   int i, j;

   for (i = 0; i < (int)block_nb; i++) {
     sub_block = message + (i << 7);

 #ifdef UNROLL_LOOPS_SHA512
     PACK64(&sub_block[0], &w[0]);
     PACK64(&sub_block[8], &w[1]);
     PACK64(&sub_block[16], &w[2]);
     PACK64(&sub_block[24], &w[3]);
     PACK64(&sub_block[32], &w[4]);
     PACK64(&sub_block[40], &w[5]);
     PACK64(&sub_block[48], &w[6]);
     PACK64(&sub_block[56], &w[7]);
     PACK64(&sub_block[64], &w[8]);
     PACK64(&sub_block[72], &w[9]);
     PACK64(&sub_block[80], &w[10]);
     PACK64(&sub_block[88], &w[11]);
     PACK64(&sub_block[96], &w[12]);
     PACK64(&sub_block[104], &w[13]);
     PACK64(&sub_block[112], &w[14]);
     PACK64(&sub_block[120], &w[15]);

     SHA512_SCR(16);
     SHA512_SCR(17);
     SHA512_SCR(18);
     SHA512_SCR(19);
     SHA512_SCR(20);
     SHA512_SCR(21);
     SHA512_SCR(22);
     SHA512_SCR(23);
     SHA512_SCR(24);
     SHA512_SCR(25);
     SHA512_SCR(26);
     SHA512_SCR(27);
     SHA512_SCR(28);
     SHA512_SCR(29);
     SHA512_SCR(30);
     SHA512_SCR(31);
     SHA512_SCR(32);
     SHA512_SCR(33);
     SHA512_SCR(34);
     SHA512_SCR(35);
     SHA512_SCR(36);
     SHA512_SCR(37);
     SHA512_SCR(38);
     SHA512_SCR(39);
     SHA512_SCR(40);
     SHA512_SCR(41);
     SHA512_SCR(42);
     SHA512_SCR(43);
     SHA512_SCR(44);
     SHA512_SCR(45);
     SHA512_SCR(46);
     SHA512_SCR(47);
     SHA512_SCR(48);
     SHA512_SCR(49);
     SHA512_SCR(50);
     SHA512_SCR(51);
     SHA512_SCR(52);
     SHA512_SCR(53);
     SHA512_SCR(54);
     SHA512_SCR(55);
     SHA512_SCR(56);
     SHA512_SCR(57);
     SHA512_SCR(58);
     SHA512_SCR(59);
     SHA512_SCR(60);
     SHA512_SCR(61);
     SHA512_SCR(62);
     SHA512_SCR(63);
     SHA512_SCR(64);
     SHA512_SCR(65);
     SHA512_SCR(66);
     SHA512_SCR(67);
     SHA512_SCR(68);
     SHA512_SCR(69);
     SHA512_SCR(70);
     SHA512_SCR(71);
     SHA512_SCR(72);
     SHA512_SCR(73);
     SHA512_SCR(74);
     SHA512_SCR(75);
     SHA512_SCR(76);
     SHA512_SCR(77);
     SHA512_SCR(78);
     SHA512_SCR(79);

     wv[0] = ctx->h[0];
     wv[1] = ctx->h[1];
     wv[2] = ctx->h[2];
     wv[3] = ctx->h[3];
     wv[4] = ctx->h[4];
     wv[5] = ctx->h[5];
     wv[6] = ctx->h[6];
     wv[7] = ctx->h[7];

     j = 0;

     do {
       SHA512_EXP(0, 1, 2, 3, 4, 5, 6, 7, j);
       j++;
       SHA512_EXP(7, 0, 1, 2, 3, 4, 5, 6, j);
       j++;
       SHA512_EXP(6, 7, 0, 1, 2, 3, 4, 5, j);
       j++;
       SHA512_EXP(5, 6, 7, 0, 1, 2, 3, 4, j);
       j++;
       SHA512_EXP(4, 5, 6, 7, 0, 1, 2, 3, j);
       j++;
       SHA512_EXP(3, 4, 5, 6, 7, 0, 1, 2, j);
       j++;
       SHA512_EXP(2, 3, 4, 5, 6, 7, 0, 1, j);
       j++;
       SHA512_EXP(1, 2, 3, 4, 5, 6, 7, 0, j);
       j++;
     } while (j < 80);

     ctx->h[0] += wv[0];
     ctx->h[1] += wv[1];
     ctx->h[2] += wv[2];
     ctx->h[3] += wv[3];
     ctx->h[4] += wv[4];
     ctx->h[5] += wv[5];
     ctx->h[6] += wv[6];
     ctx->h[7] += wv[7];
 #else
     for (j = 0; j < 16; j++) {
       PACK64(&sub_block[j << 3], &w[j]);
     }

     for (j = 16; j < 80; j++) {
       SHA512_SCR(j);
     }

     for (j = 0; j < 8; j++) {
       wv[j] = ctx->h[j];
     }

     for (j = 0; j < 80; j++) {
       t1 = wv[7] + SHA512_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) + sha512_k[j] +
            w[j];
       t2 = SHA512_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
       wv[7] = wv[6];
       wv[6] = wv[5];
       wv[5] = wv[4];
       wv[4] = wv[3] + t1;
       wv[3] = wv[2];
       wv[2] = wv[1];
       wv[1] = wv[0];
       wv[0] = t1 + t2;
     }

     for (j = 0; j < 8; j++)
       ctx->h[j] += wv[j];
 #endif /* UNROLL_LOOPS_SHA512 */
   }
 }

 void avb_sha512_update(AvbSHA512Ctx* ctx, const uint8_t* data, uint32_t len) {
   unsigned int block_nb;
   unsigned int new_len, rem_len, tmp_len;
   const uint8_t* shifted_data;

   tmp_len = AVB_SHA512_BLOCK_SIZE - ctx->len;
   rem_len = len < tmp_len ? len : tmp_len;

   avb_memcpy(&ctx->block[ctx->len], data, rem_len);

   if (ctx->len + len < AVB_SHA512_BLOCK_SIZE) {
     ctx->len += len;
     return;
   }

   new_len = len - rem_len;
   block_nb = new_len / AVB_SHA512_BLOCK_SIZE;

   shifted_data = data + rem_len;

   SHA512_transform(ctx, ctx->block, 1);
   SHA512_transform(ctx, shifted_data, block_nb);

   rem_len = new_len % AVB_SHA512_BLOCK_SIZE;

   avb_memcpy(ctx->block, &shifted_data[block_nb << 7], rem_len);

   ctx->len = rem_len;
   ctx->tot_len += (block_nb + 1) << 7;
 }

 uint8_t* avb_sha512_final(AvbSHA512Ctx* ctx) {
   unsigned int block_nb;
   unsigned int pm_len;
   unsigned int len_b;

 #ifndef UNROLL_LOOPS_SHA512
   int i;
 #endif

   block_nb =
       1 + ((AVB_SHA512_BLOCK_SIZE - 17) < (ctx->len % AVB_SHA512_BLOCK_SIZE));

   len_b = (ctx->tot_len + ctx->len) << 3;
   pm_len = block_nb << 7;

   avb_memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
   ctx->block[ctx->len] = 0x80;
   UNPACK32(len_b, ctx->block + pm_len - 4);

   SHA512_transform(ctx, ctx->block, block_nb);

 #ifdef UNROLL_LOOPS_SHA512
   UNPACK64(ctx->h[0], &ctx->buf[0]);
   UNPACK64(ctx->h[1], &ctx->buf[8]);
   UNPACK64(ctx->h[2], &ctx->buf[16]);
   UNPACK64(ctx->h[3], &ctx->buf[24]);
   UNPACK64(ctx->h[4], &ctx->buf[32]);
   UNPACK64(ctx->h[5], &ctx->buf[40]);
   UNPACK64(ctx->h[6], &ctx->buf[48]);
   UNPACK64(ctx->h[7], &ctx->buf[56]);
 #else
   for (i = 0; i < 8; i++)
     UNPACK64(ctx->h[i], &ctx->buf[i << 3]);
 #endif /* UNROLL_LOOPS_SHA512 */

   return ctx->buf;
 }
	/* SHA-256 and SHA-512 implementation based on code by Oliver Gay
	* <olivier.gay@a3.epfl.ch> under a BSD-style license. See below.
	*/

	/*
	* FIPS 180-2 SHA-224/256/384/512 implementation
	* Last update: 02/02/2007
	* Issue date: 04/30/2005
	*
	* Copyright (C) 2005, 2007 Olivier Gay <olivier.gay@a3.epfl.ch>
	* 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 project nor the names of its contributors
	* may be used to endorse or promote products derived from this software
	* without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``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 PROJECT 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.
	*/

	#include "avb_sha.h"

	#define SHFR(x, n) (x >> n)
	#define ROTR(x, n) ((x >> n) \| (x << ((sizeof(x) << 3) - n)))
	#define ROTL(x, n) ((x << n) \| (x >> ((sizeof(x) << 3) - n)))
	#define CH(x, y, z) ((x & y) ^ (~x & z))
	#define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))

	#define SHA512_F1(x) (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39))
	#define SHA512_F2(x) (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41))
	#define SHA512_F3(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ SHFR(x, 7))
	#define SHA512_F4(x) (ROTR(x, 19) ^ ROTR(x, 61) ^ SHFR(x, 6))

	#define UNPACK32(x, str) \
	{ \
	*((str) + 3) = (uint8_t)((x)); \
	*((str) + 2) = (uint8_t)((x) >> 8); \
	*((str) + 1) = (uint8_t)((x) >> 16); \
	*((str) + 0) = (uint8_t)((x) >> 24); \
	}

	#define UNPACK64(x, str) \
	{ \
	*((str) + 7) = (uint8_t)x; \
	*((str) + 6) = (uint8_t)((uint64_t)x >> 8); \
	*((str) + 5) = (uint8_t)((uint64_t)x >> 16); \
	*((str) + 4) = (uint8_t)((uint64_t)x >> 24); \
	*((str) + 3) = (uint8_t)((uint64_t)x >> 32); \
	*((str) + 2) = (uint8_t)((uint64_t)x >> 40); \
	*((str) + 1) = (uint8_t)((uint64_t)x >> 48); \
	*((str) + 0) = (uint8_t)((uint64_t)x >> 56); \
	}

	#define PACK64(str, x) \
	{ \
	*(x) = \
	((uint64_t) * ((str) + 7)) \| ((uint64_t) * ((str) + 6) << 8) \| \
	((uint64_t) * ((str) + 5) << 16) \| ((uint64_t) * ((str) + 4) << 24) \| \
	((uint64_t) * ((str) + 3) << 32) \| ((uint64_t) * ((str) + 2) << 40) \| \
	((uint64_t) * ((str) + 1) << 48) \| ((uint64_t) * ((str) + 0) << 56); \
	}

	/* Macros used for loops unrolling */

	#define SHA512_SCR(i) \
	{ w[i] = SHA512_F4(w[i - 2]) + w[i - 7] + SHA512_F3(w[i - 15]) + w[i - 16]; }

	#define SHA512_EXP(a, b, c, d, e, f, g, h, j) \
	{ \
	t1 = wv[h] + SHA512_F2(wv[e]) + CH(wv[e], wv[f], wv[g]) + sha512_k[j] + \
	w[j]; \
	t2 = SHA512_F1(wv[a]) + MAJ(wv[a], wv[b], wv[c]); \
	wv[d] += t1; \
	wv[h] = t1 + t2; \
	}

	static const uint64_t sha512_h0[8] = {0x6a09e667f3bcc908ULL,
	0xbb67ae8584caa73bULL,
	0x3c6ef372fe94f82bULL,
	0xa54ff53a5f1d36f1ULL,
	0x510e527fade682d1ULL,
	0x9b05688c2b3e6c1fULL,
	0x1f83d9abfb41bd6bULL,
	0x5be0cd19137e2179ULL};

	static const uint64_t sha512_k[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};

	/* SHA-512 implementation */

	void avb_sha512_init(AvbSHA512Ctx* ctx) {
	#ifdef UNROLL_LOOPS_SHA512
	ctx->h[0] = sha512_h0[0];
	ctx->h[1] = sha512_h0[1];
	ctx->h[2] = sha512_h0[2];
	ctx->h[3] = sha512_h0[3];
	ctx->h[4] = sha512_h0[4];
	ctx->h[5] = sha512_h0[5];
	ctx->h[6] = sha512_h0[6];
	ctx->h[7] = sha512_h0[7];
	#else
	int i;

	for (i = 0; i < 8; i++)
	ctx->h[i] = sha512_h0[i];
	#endif /* UNROLL_LOOPS_SHA512 */

	ctx->len = 0;
	ctx->tot_len = 0;
	}

	static void SHA512_transform(AvbSHA512Ctx* ctx,
	const uint8_t* message,
	unsigned int block_nb) {
	uint64_t w[80];
	uint64_t wv[8];
	uint64_t t1, t2;
	const uint8_t* sub_block;
	int i, j;

	for (i = 0; i < (int)block_nb; i++) {
	sub_block = message + (i << 7);

	#ifdef UNROLL_LOOPS_SHA512
	PACK64(&sub_block[0], &w[0]);
	PACK64(&sub_block[8], &w[1]);
	PACK64(&sub_block[16], &w[2]);
	PACK64(&sub_block[24], &w[3]);
	PACK64(&sub_block[32], &w[4]);
	PACK64(&sub_block[40], &w[5]);
	PACK64(&sub_block[48], &w[6]);
	PACK64(&sub_block[56], &w[7]);
	PACK64(&sub_block[64], &w[8]);
	PACK64(&sub_block[72], &w[9]);
	PACK64(&sub_block[80], &w[10]);
	PACK64(&sub_block[88], &w[11]);
	PACK64(&sub_block[96], &w[12]);
	PACK64(&sub_block[104], &w[13]);
	PACK64(&sub_block[112], &w[14]);
	PACK64(&sub_block[120], &w[15]);

	SHA512_SCR(16);
	SHA512_SCR(17);
	SHA512_SCR(18);
	SHA512_SCR(19);
	SHA512_SCR(20);
	SHA512_SCR(21);
	SHA512_SCR(22);
	SHA512_SCR(23);
	SHA512_SCR(24);
	SHA512_SCR(25);
	SHA512_SCR(26);
	SHA512_SCR(27);
	SHA512_SCR(28);
	SHA512_SCR(29);
	SHA512_SCR(30);
	SHA512_SCR(31);
	SHA512_SCR(32);
	SHA512_SCR(33);
	SHA512_SCR(34);
	SHA512_SCR(35);
	SHA512_SCR(36);
	SHA512_SCR(37);
	SHA512_SCR(38);
	SHA512_SCR(39);
	SHA512_SCR(40);
	SHA512_SCR(41);
	SHA512_SCR(42);
	SHA512_SCR(43);
	SHA512_SCR(44);
	SHA512_SCR(45);
	SHA512_SCR(46);
	SHA512_SCR(47);
	SHA512_SCR(48);
	SHA512_SCR(49);
	SHA512_SCR(50);
	SHA512_SCR(51);
	SHA512_SCR(52);
	SHA512_SCR(53);
	SHA512_SCR(54);
	SHA512_SCR(55);
	SHA512_SCR(56);
	SHA512_SCR(57);
	SHA512_SCR(58);
	SHA512_SCR(59);
	SHA512_SCR(60);
	SHA512_SCR(61);
	SHA512_SCR(62);
	SHA512_SCR(63);
	SHA512_SCR(64);
	SHA512_SCR(65);
	SHA512_SCR(66);
	SHA512_SCR(67);
	SHA512_SCR(68);
	SHA512_SCR(69);
	SHA512_SCR(70);
	SHA512_SCR(71);
	SHA512_SCR(72);
	SHA512_SCR(73);
	SHA512_SCR(74);
	SHA512_SCR(75);
	SHA512_SCR(76);
	SHA512_SCR(77);
	SHA512_SCR(78);
	SHA512_SCR(79);

	wv[0] = ctx->h[0];
	wv[1] = ctx->h[1];
	wv[2] = ctx->h[2];
	wv[3] = ctx->h[3];
	wv[4] = ctx->h[4];
	wv[5] = ctx->h[5];
	wv[6] = ctx->h[6];
	wv[7] = ctx->h[7];

	j = 0;

	do {
	SHA512_EXP(0, 1, 2, 3, 4, 5, 6, 7, j);
	j++;
	SHA512_EXP(7, 0, 1, 2, 3, 4, 5, 6, j);
	j++;
	SHA512_EXP(6, 7, 0, 1, 2, 3, 4, 5, j);
	j++;
	SHA512_EXP(5, 6, 7, 0, 1, 2, 3, 4, j);
	j++;
	SHA512_EXP(4, 5, 6, 7, 0, 1, 2, 3, j);
	j++;
	SHA512_EXP(3, 4, 5, 6, 7, 0, 1, 2, j);
	j++;
	SHA512_EXP(2, 3, 4, 5, 6, 7, 0, 1, j);
	j++;
	SHA512_EXP(1, 2, 3, 4, 5, 6, 7, 0, j);
	j++;
	} while (j < 80);

	ctx->h[0] += wv[0];
	ctx->h[1] += wv[1];
	ctx->h[2] += wv[2];
	ctx->h[3] += wv[3];
	ctx->h[4] += wv[4];
	ctx->h[5] += wv[5];
	ctx->h[6] += wv[6];
	ctx->h[7] += wv[7];
	#else
	for (j = 0; j < 16; j++) {
	PACK64(&sub_block[j << 3], &w[j]);
	}

	for (j = 16; j < 80; j++) {
	SHA512_SCR(j);
	}

	for (j = 0; j < 8; j++) {
	wv[j] = ctx->h[j];
	}

	for (j = 0; j < 80; j++) {
	t1 = wv[7] + SHA512_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) + sha512_k[j] +
	w[j];
	t2 = SHA512_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
	wv[7] = wv[6];
	wv[6] = wv[5];
	wv[5] = wv[4];
	wv[4] = wv[3] + t1;
	wv[3] = wv[2];
	wv[2] = wv[1];
	wv[1] = wv[0];
	wv[0] = t1 + t2;
	}

	for (j = 0; j < 8; j++)
	ctx->h[j] += wv[j];
	#endif /* UNROLL_LOOPS_SHA512 */
	}
	}

	void avb_sha512_update(AvbSHA512Ctx* ctx, const uint8_t* data, uint32_t len) {
	unsigned int block_nb;
	unsigned int new_len, rem_len, tmp_len;
	const uint8_t* shifted_data;

	tmp_len = AVB_SHA512_BLOCK_SIZE - ctx->len;
	rem_len = len < tmp_len ? len : tmp_len;

	avb_memcpy(&ctx->block[ctx->len], data, rem_len);

	if (ctx->len + len < AVB_SHA512_BLOCK_SIZE) {
	ctx->len += len;
	return;
	}

	new_len = len - rem_len;
	block_nb = new_len / AVB_SHA512_BLOCK_SIZE;

	shifted_data = data + rem_len;

	SHA512_transform(ctx, ctx->block, 1);
	SHA512_transform(ctx, shifted_data, block_nb);

	rem_len = new_len % AVB_SHA512_BLOCK_SIZE;

	avb_memcpy(ctx->block, &shifted_data[block_nb << 7], rem_len);

	ctx->len = rem_len;
	ctx->tot_len += (block_nb + 1) << 7;
	}

	uint8_t* avb_sha512_final(AvbSHA512Ctx* ctx) {
	unsigned int block_nb;
	unsigned int pm_len;
	unsigned int len_b;

	#ifndef UNROLL_LOOPS_SHA512
	int i;
	#endif

	block_nb =
	1 + ((AVB_SHA512_BLOCK_SIZE - 17) < (ctx->len % AVB_SHA512_BLOCK_SIZE));

	len_b = (ctx->tot_len + ctx->len) << 3;
	pm_len = block_nb << 7;

	avb_memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
	ctx->block[ctx->len] = 0x80;
	UNPACK32(len_b, ctx->block + pm_len - 4);

	SHA512_transform(ctx, ctx->block, block_nb);

	#ifdef UNROLL_LOOPS_SHA512
	UNPACK64(ctx->h[0], &ctx->buf[0]);
	UNPACK64(ctx->h[1], &ctx->buf[8]);
	UNPACK64(ctx->h[2], &ctx->buf[16]);
	UNPACK64(ctx->h[3], &ctx->buf[24]);
	UNPACK64(ctx->h[4], &ctx->buf[32]);
	UNPACK64(ctx->h[5], &ctx->buf[40]);
	UNPACK64(ctx->h[6], &ctx->buf[48]);
	UNPACK64(ctx->h[7], &ctx->buf[56]);
	#else
	for (i = 0; i < 8; i++)
	UNPACK64(ctx->h[i], &ctx->buf[i << 3]);
	#endif /* UNROLL_LOOPS_SHA512 */

	return ctx->buf;
	}