/* SHA-256 and SHA-512 implementation based on code by Oliver Gay
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* <olivier.gay@a3.epfl.ch> under a BSD-style license. See below.
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*/
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/*
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* FIPS 180-2 SHA-224/256/384/512 implementation
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* Last update: 02/02/2007
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* Issue date: 04/30/2005
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*
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* Copyright (C) 2005, 2007 Olivier Gay <olivier.gay@a3.epfl.ch>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "avb_sha.h"
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#define SHFR(x, n) (x >> n)
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#define ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
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#define ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
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#define CH(x, y, z) ((x & y) ^ (~x & z))
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#define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
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#define SHA512_F1(x) (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39))
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#define SHA512_F2(x) (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41))
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#define SHA512_F3(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ SHFR(x, 7))
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#define SHA512_F4(x) (ROTR(x, 19) ^ ROTR(x, 61) ^ SHFR(x, 6))
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#define UNPACK32(x, str) \
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{ \
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*((str) + 3) = (uint8_t)((x)); \
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*((str) + 2) = (uint8_t)((x) >> 8); \
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*((str) + 1) = (uint8_t)((x) >> 16); \
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*((str) + 0) = (uint8_t)((x) >> 24); \
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}
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#define UNPACK64(x, str) \
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{ \
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*((str) + 7) = (uint8_t)x; \
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*((str) + 6) = (uint8_t)((uint64_t)x >> 8); \
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*((str) + 5) = (uint8_t)((uint64_t)x >> 16); \
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*((str) + 4) = (uint8_t)((uint64_t)x >> 24); \
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*((str) + 3) = (uint8_t)((uint64_t)x >> 32); \
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*((str) + 2) = (uint8_t)((uint64_t)x >> 40); \
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*((str) + 1) = (uint8_t)((uint64_t)x >> 48); \
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*((str) + 0) = (uint8_t)((uint64_t)x >> 56); \
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}
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#define PACK64(str, x) \
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{ \
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*(x) = \
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((uint64_t) * ((str) + 7)) | ((uint64_t) * ((str) + 6) << 8) | \
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((uint64_t) * ((str) + 5) << 16) | ((uint64_t) * ((str) + 4) << 24) | \
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((uint64_t) * ((str) + 3) << 32) | ((uint64_t) * ((str) + 2) << 40) | \
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((uint64_t) * ((str) + 1) << 48) | ((uint64_t) * ((str) + 0) << 56); \
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}
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/* Macros used for loops unrolling */
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#define SHA512_SCR(i) \
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{ w[i] = SHA512_F4(w[i - 2]) + w[i - 7] + SHA512_F3(w[i - 15]) + w[i - 16]; }
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#define SHA512_EXP(a, b, c, d, e, f, g, h, j) \
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{ \
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t1 = wv[h] + SHA512_F2(wv[e]) + CH(wv[e], wv[f], wv[g]) + sha512_k[j] + \
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w[j]; \
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t2 = SHA512_F1(wv[a]) + MAJ(wv[a], wv[b], wv[c]); \
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wv[d] += t1; \
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wv[h] = t1 + t2; \
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}
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static const uint64_t sha512_h0[8] = {0x6a09e667f3bcc908ULL,
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0xbb67ae8584caa73bULL,
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0x3c6ef372fe94f82bULL,
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0xa54ff53a5f1d36f1ULL,
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0x510e527fade682d1ULL,
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0x9b05688c2b3e6c1fULL,
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0x1f83d9abfb41bd6bULL,
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0x5be0cd19137e2179ULL};
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static const uint64_t sha512_k[80] = {
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0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
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0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
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0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
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0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
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0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
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0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
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0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
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0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
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0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
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0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
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0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
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0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
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0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
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0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
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0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
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0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
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0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
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0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
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0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
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0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
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0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
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0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
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0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
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0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
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0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
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0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
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0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL};
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/* SHA-512 implementation */
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void avb_sha512_init(AvbSHA512Ctx* ctx) {
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#ifdef UNROLL_LOOPS_SHA512
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ctx->h[0] = sha512_h0[0];
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ctx->h[1] = sha512_h0[1];
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ctx->h[2] = sha512_h0[2];
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ctx->h[3] = sha512_h0[3];
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ctx->h[4] = sha512_h0[4];
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ctx->h[5] = sha512_h0[5];
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ctx->h[6] = sha512_h0[6];
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ctx->h[7] = sha512_h0[7];
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#else
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int i;
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for (i = 0; i < 8; i++)
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ctx->h[i] = sha512_h0[i];
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#endif /* UNROLL_LOOPS_SHA512 */
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ctx->len = 0;
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ctx->tot_len = 0;
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}
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static void SHA512_transform(AvbSHA512Ctx* ctx,
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const uint8_t* message,
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unsigned int block_nb) {
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uint64_t w[80];
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uint64_t wv[8];
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uint64_t t1, t2;
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const uint8_t* sub_block;
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int i, j;
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for (i = 0; i < (int)block_nb; i++) {
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sub_block = message + (i << 7);
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#ifdef UNROLL_LOOPS_SHA512
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PACK64(&sub_block[0], &w[0]);
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PACK64(&sub_block[8], &w[1]);
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PACK64(&sub_block[16], &w[2]);
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PACK64(&sub_block[24], &w[3]);
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PACK64(&sub_block[32], &w[4]);
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PACK64(&sub_block[40], &w[5]);
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PACK64(&sub_block[48], &w[6]);
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PACK64(&sub_block[56], &w[7]);
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PACK64(&sub_block[64], &w[8]);
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PACK64(&sub_block[72], &w[9]);
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PACK64(&sub_block[80], &w[10]);
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PACK64(&sub_block[88], &w[11]);
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PACK64(&sub_block[96], &w[12]);
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PACK64(&sub_block[104], &w[13]);
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PACK64(&sub_block[112], &w[14]);
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PACK64(&sub_block[120], &w[15]);
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SHA512_SCR(16);
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SHA512_SCR(17);
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SHA512_SCR(18);
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SHA512_SCR(19);
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SHA512_SCR(20);
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SHA512_SCR(21);
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SHA512_SCR(22);
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SHA512_SCR(23);
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SHA512_SCR(24);
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SHA512_SCR(25);
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SHA512_SCR(26);
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SHA512_SCR(27);
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SHA512_SCR(28);
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SHA512_SCR(29);
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SHA512_SCR(30);
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SHA512_SCR(31);
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SHA512_SCR(32);
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SHA512_SCR(33);
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SHA512_SCR(34);
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SHA512_SCR(35);
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SHA512_SCR(36);
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SHA512_SCR(37);
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SHA512_SCR(38);
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SHA512_SCR(39);
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SHA512_SCR(40);
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SHA512_SCR(41);
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SHA512_SCR(42);
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SHA512_SCR(43);
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SHA512_SCR(44);
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SHA512_SCR(45);
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SHA512_SCR(46);
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SHA512_SCR(47);
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SHA512_SCR(48);
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SHA512_SCR(49);
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SHA512_SCR(50);
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SHA512_SCR(51);
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SHA512_SCR(52);
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SHA512_SCR(53);
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SHA512_SCR(54);
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SHA512_SCR(55);
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SHA512_SCR(56);
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SHA512_SCR(57);
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SHA512_SCR(58);
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SHA512_SCR(59);
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SHA512_SCR(60);
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SHA512_SCR(61);
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SHA512_SCR(62);
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SHA512_SCR(63);
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SHA512_SCR(64);
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SHA512_SCR(65);
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SHA512_SCR(66);
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SHA512_SCR(67);
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SHA512_SCR(68);
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SHA512_SCR(69);
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SHA512_SCR(70);
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SHA512_SCR(71);
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SHA512_SCR(72);
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SHA512_SCR(73);
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SHA512_SCR(74);
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SHA512_SCR(75);
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SHA512_SCR(76);
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SHA512_SCR(77);
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SHA512_SCR(78);
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SHA512_SCR(79);
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wv[0] = ctx->h[0];
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wv[1] = ctx->h[1];
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wv[2] = ctx->h[2];
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wv[3] = ctx->h[3];
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wv[4] = ctx->h[4];
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wv[5] = ctx->h[5];
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wv[6] = ctx->h[6];
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wv[7] = ctx->h[7];
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j = 0;
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do {
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SHA512_EXP(0, 1, 2, 3, 4, 5, 6, 7, j);
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j++;
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SHA512_EXP(7, 0, 1, 2, 3, 4, 5, 6, j);
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j++;
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SHA512_EXP(6, 7, 0, 1, 2, 3, 4, 5, j);
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j++;
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SHA512_EXP(5, 6, 7, 0, 1, 2, 3, 4, j);
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j++;
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SHA512_EXP(4, 5, 6, 7, 0, 1, 2, 3, j);
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j++;
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SHA512_EXP(3, 4, 5, 6, 7, 0, 1, 2, j);
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j++;
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SHA512_EXP(2, 3, 4, 5, 6, 7, 0, 1, j);
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j++;
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SHA512_EXP(1, 2, 3, 4, 5, 6, 7, 0, j);
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j++;
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} while (j < 80);
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ctx->h[0] += wv[0];
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ctx->h[1] += wv[1];
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ctx->h[2] += wv[2];
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ctx->h[3] += wv[3];
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ctx->h[4] += wv[4];
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ctx->h[5] += wv[5];
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ctx->h[6] += wv[6];
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ctx->h[7] += wv[7];
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#else
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for (j = 0; j < 16; j++) {
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PACK64(&sub_block[j << 3], &w[j]);
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}
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for (j = 16; j < 80; j++) {
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SHA512_SCR(j);
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}
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for (j = 0; j < 8; j++) {
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wv[j] = ctx->h[j];
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}
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for (j = 0; j < 80; j++) {
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t1 = wv[7] + SHA512_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) + sha512_k[j] +
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w[j];
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t2 = SHA512_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
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wv[7] = wv[6];
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wv[6] = wv[5];
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wv[5] = wv[4];
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wv[4] = wv[3] + t1;
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wv[3] = wv[2];
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wv[2] = wv[1];
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wv[1] = wv[0];
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wv[0] = t1 + t2;
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}
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for (j = 0; j < 8; j++)
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ctx->h[j] += wv[j];
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#endif /* UNROLL_LOOPS_SHA512 */
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}
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}
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void avb_sha512_update(AvbSHA512Ctx* ctx, const uint8_t* data, uint32_t len) {
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unsigned int block_nb;
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unsigned int new_len, rem_len, tmp_len;
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const uint8_t* shifted_data;
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tmp_len = AVB_SHA512_BLOCK_SIZE - ctx->len;
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rem_len = len < tmp_len ? len : tmp_len;
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avb_memcpy(&ctx->block[ctx->len], data, rem_len);
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if (ctx->len + len < AVB_SHA512_BLOCK_SIZE) {
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ctx->len += len;
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return;
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}
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new_len = len - rem_len;
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block_nb = new_len / AVB_SHA512_BLOCK_SIZE;
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shifted_data = data + rem_len;
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SHA512_transform(ctx, ctx->block, 1);
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SHA512_transform(ctx, shifted_data, block_nb);
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rem_len = new_len % AVB_SHA512_BLOCK_SIZE;
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avb_memcpy(ctx->block, &shifted_data[block_nb << 7], rem_len);
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ctx->len = rem_len;
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ctx->tot_len += (block_nb + 1) << 7;
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}
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uint8_t* avb_sha512_final(AvbSHA512Ctx* ctx) {
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unsigned int block_nb;
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unsigned int pm_len;
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unsigned int len_b;
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#ifndef UNROLL_LOOPS_SHA512
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int i;
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#endif
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block_nb =
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1 + ((AVB_SHA512_BLOCK_SIZE - 17) < (ctx->len % AVB_SHA512_BLOCK_SIZE));
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len_b = (ctx->tot_len + ctx->len) << 3;
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pm_len = block_nb << 7;
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avb_memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
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ctx->block[ctx->len] = 0x80;
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UNPACK32(len_b, ctx->block + pm_len - 4);
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SHA512_transform(ctx, ctx->block, block_nb);
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#ifdef UNROLL_LOOPS_SHA512
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UNPACK64(ctx->h[0], &ctx->buf[0]);
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UNPACK64(ctx->h[1], &ctx->buf[8]);
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UNPACK64(ctx->h[2], &ctx->buf[16]);
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UNPACK64(ctx->h[3], &ctx->buf[24]);
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UNPACK64(ctx->h[4], &ctx->buf[32]);
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UNPACK64(ctx->h[5], &ctx->buf[40]);
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UNPACK64(ctx->h[6], &ctx->buf[48]);
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UNPACK64(ctx->h[7], &ctx->buf[56]);
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#else
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for (i = 0; i < 8; i++)
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UNPACK64(ctx->h[i], &ctx->buf[i << 3]);
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#endif /* UNROLL_LOOPS_SHA512 */
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return ctx->buf;
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}
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