From 2e80472f1cfe352a5494cd5fbebf7705911501bb Mon Sep 17 00:00:00 2001 From: NIIBE Yutaka Date: Wed, 5 Feb 2014 16:20:26 +0900 Subject: [PATCH] Add sha512 --- ChangeLog | 2 + src/sha512.c | 216 +++++++++++++++++++++++++++++++++++++++++++++++++++ src/sha512.h | 17 ++++ 3 files changed, 235 insertions(+) create mode 100644 src/sha512.c create mode 100644 src/sha512.h diff --git a/ChangeLog b/ChangeLog index 790cf12..d51898b 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,7 @@ 2014-02-05 NIIBE Yutaka + * src/sha512.h, src/sha512.c: New. + * src/sha256.c (initial_state): Don't export, it's internal. 2014-01-28 Niibe Yutaka diff --git a/src/sha512.c b/src/sha512.c new file mode 100644 index 0000000..c9e3897 --- /dev/null +++ b/src/sha512.c @@ -0,0 +1,216 @@ +/* + * sha512.c -- Compute SHA-512 hash (for little endian architecture). + * + * This module is written by gniibe, following the API of sha256.c. + * + * Copyright (C) 2014 Free Software Initiative of Japan + * Author: NIIBE Yutaka + * + * This file is a part of Gnuk, a GnuPG USB Token implementation. + * + * Gnuk is free software: you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * Gnuk 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 General Public + * License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + * + */ + +/* + * Reference: + * + * [1] FIPS PUB 180-4: Secure hash Standard (SHS), March, 2012. + * + */ + +#include +#include +#include +#include "sha512.h" + +#define SHA512_MASK (SHA512_BLOCK_SIZE - 1) + +static void memcpy_bswap64 (unsigned char dst[64], const uint64_t *p) +{ + int i; + uint64_t q; + + for (i = 0; i < 64; i++) + { + if ((i & 7) == 0) + q = __builtin_bswap64 (p[i >> 3]); /* bswap64 is GCC extention */ + dst[i] = q >> ((i & 7) * 8); + } +} + +#define rotr64(x,n) (((x) >> n) | ((x) << (64 - n))) + +#define ch(x,y,z) ((z) ^ ((x) & ((y) ^ (z)))) +#define maj(x,y,z) (((x) & (y)) | ((z) & ((x) ^ (y)))) + +/* round transforms for SHA512 compression functions */ +#define vf(n,i) v[(n - i) & 7] + +#define hf(i) (p[i & 15] += \ + g_1(p[(i + 14) & 15]) + p[(i + 9) & 15] + g_0(p[(i + 1) & 15])) + +#define v_cycle0(i) \ + p[i] = __builtin_bswap64 (p[i]); \ + vf(7,i) += p[i] + k_0[i] \ + + s_1(vf(4,i)) + ch(vf(4,i),vf(5,i),vf(6,i)); \ + vf(3,i) += vf(7,i); \ + vf(7,i) += s_0(vf(0,i))+ maj(vf(0,i),vf(1,i),vf(2,i)) + +#define v_cycle(i, j) \ + vf(7,i) += hf(i) + k_0[i+j] \ + + s_1(vf(4,i)) + ch(vf(4,i),vf(5,i),vf(6,i)); \ + vf(3,i) += vf(7,i); \ + vf(7,i) += s_0(vf(0,i))+ maj(vf(0,i),vf(1,i),vf(2,i)) + +#define s_0(x) (rotr64((x), 28) ^ rotr64((x), 34) ^ rotr64((x), 39)) +#define s_1(x) (rotr64((x), 14) ^ rotr64((x), 18) ^ rotr64((x), 41)) +#define g_0(x) (rotr64((x), 1) ^ rotr64((x), 8) ^ ((x) >> 7)) +#define g_1(x) (rotr64((x), 19) ^ rotr64((x), 61) ^ ((x) >> 6)) +#define k_0 k512 + +/* Taken from section 4.2.3 of [1]. */ +static const uint64_t k512[80] = { +0x428a2f98d728ae22, 0x7137449123ef65cd, 0xb5c0fbcfec4d3b2f, 0xe9b5dba58189dbbc, +0x3956c25bf348b538, 0x59f111f1b605d019, 0x923f82a4af194f9b, 0xab1c5ed5da6d8118, +0xd807aa98a3030242, 0x12835b0145706fbe, 0x243185be4ee4b28c, 0x550c7dc3d5ffb4e2, +0x72be5d74f27b896f, 0x80deb1fe3b1696b1, 0x9bdc06a725c71235, 0xc19bf174cf692694, +0xe49b69c19ef14ad2, 0xefbe4786384f25e3, 0x0fc19dc68b8cd5b5, 0x240ca1cc77ac9c65, +0x2de92c6f592b0275, 0x4a7484aa6ea6e483, 0x5cb0a9dcbd41fbd4, 0x76f988da831153b5, +0x983e5152ee66dfab, 0xa831c66d2db43210, 0xb00327c898fb213f, 0xbf597fc7beef0ee4, +0xc6e00bf33da88fc2, 0xd5a79147930aa725, 0x06ca6351e003826f, 0x142929670a0e6e70, +0x27b70a8546d22ffc, 0x2e1b21385c26c926, 0x4d2c6dfc5ac42aed, 0x53380d139d95b3df, +0x650a73548baf63de, 0x766a0abb3c77b2a8, 0x81c2c92e47edaee6, 0x92722c851482353b, +0xa2bfe8a14cf10364, 0xa81a664bbc423001, 0xc24b8b70d0f89791, 0xc76c51a30654be30, +0xd192e819d6ef5218, 0xd69906245565a910, 0xf40e35855771202a, 0x106aa07032bbd1b8, +0x19a4c116b8d2d0c8, 0x1e376c085141ab53, 0x2748774cdf8eeb99, 0x34b0bcb5e19b48a8, +0x391c0cb3c5c95a63, 0x4ed8aa4ae3418acb, 0x5b9cca4f7763e373, 0x682e6ff3d6b2b8a3, +0x748f82ee5defb2fc, 0x78a5636f43172f60, 0x84c87814a1f0ab72, 0x8cc702081a6439ec, +0x90befffa23631e28, 0xa4506cebde82bde9, 0xbef9a3f7b2c67915, 0xc67178f2e372532b, +0xca273eceea26619c, 0xd186b8c721c0c207, 0xeada7dd6cde0eb1e, 0xf57d4f7fee6ed178, +0x06f067aa72176fba, 0x0a637dc5a2c898a6, 0x113f9804bef90dae, 0x1b710b35131c471b, +0x28db77f523047d84, 0x32caab7b40c72493, 0x3c9ebe0a15c9bebc, 0x431d67c49c100d4c, +0x4cc5d4becb3e42b6, 0x597f299cfc657e2a, 0x5fcb6fab3ad6faec, 0x6c44198c4a475817 +}; + +void +sha512_process (sha512_context *ctx) +{ + uint32_t i; + uint64_t *p = ctx->wbuf; + uint64_t v[8]; + + memcpy (v, ctx->state, 8 * sizeof (uint64_t)); + + v_cycle0 ( 0); v_cycle0 ( 1); v_cycle0 ( 2); v_cycle0 ( 3); + v_cycle0 ( 4); v_cycle0 ( 5); v_cycle0 ( 6); v_cycle0 ( 7); + v_cycle0 ( 8); v_cycle0 ( 9); v_cycle0 (10); v_cycle0 (11); + v_cycle0 (12); v_cycle0 (13); v_cycle0 (14); v_cycle0 (15); + + for (i = 16; i < 80; i += 16) + { + v_cycle ( 0, i); v_cycle ( 1, i); v_cycle ( 2, i); v_cycle ( 3, i); + v_cycle ( 4, i); v_cycle ( 5, i); v_cycle ( 6, i); v_cycle ( 7, i); + v_cycle ( 8, i); v_cycle ( 9, i); v_cycle (10, i); v_cycle (11, i); + v_cycle (12, i); v_cycle (13, i); v_cycle (14, i); v_cycle (15, i); + } + + ctx->state[0] += v[0]; + ctx->state[1] += v[1]; + ctx->state[2] += v[2]; + ctx->state[3] += v[3]; + ctx->state[4] += v[4]; + ctx->state[5] += v[5]; + ctx->state[6] += v[6]; + ctx->state[7] += v[7]; +} + +void +sha512_update (sha512_context *ctx, const unsigned char *input, + unsigned int ilen) +{ + uint32_t left = (ctx->total[0] & SHA512_MASK); + uint32_t fill = SHA512_BLOCK_SIZE - left; + + ctx->total[0] += ilen; + if (ctx->total[0] < ilen) + ctx->total[1]++; + + while (ilen >= fill) + { + memcpy (((unsigned char*)ctx->wbuf) + left, input, fill); + sha512_process (ctx); + input += fill; + ilen -= fill; + left = 0; + fill = SHA512_BLOCK_SIZE; + } + + memcpy (((unsigned char*)ctx->wbuf) + left, input, ilen); +} + +void +sha512_finish (sha512_context *ctx, unsigned char output[64]) +{ + uint32_t last = (ctx->total[0] & SHA512_MASK); + + ctx->wbuf[last >> 3] = __builtin_bswap64 (ctx->wbuf[last >> 3]); + ctx->wbuf[last >> 3] &= 0xffffffffffffff80LL << (8 * (~last & 7)); + ctx->wbuf[last >> 3] |= 0x0000000000000080LL << (8 * (~last & 7)); + ctx->wbuf[last >> 3] = __builtin_bswap64 (ctx->wbuf[last >> 3]); + + if (last > SHA512_BLOCK_SIZE - 17) + { + if (last < 120) + ctx->wbuf[15] = 0; + sha512_process (ctx); + last = 0; + } + else + last = (last >> 3) + 1; + + while (last < 14) + ctx->wbuf[last++] = 0; + + ctx->wbuf[14] = __builtin_bswap64 ((ctx->total[0] >> 61) | (ctx->total[1] << 3)); + ctx->wbuf[15] = __builtin_bswap64 (ctx->total[0] << 3); + sha512_process (ctx); + + memcpy_bswap64 (output, ctx->state); + memset (ctx, 0, sizeof (sha512_context)); +} + +/* Taken from section 5.3.5 of [1]. */ +static const uint64_t initial_state[8] = { +0x6a09e667f3bcc908, 0xbb67ae8584caa73b, 0x3c6ef372fe94f82b, 0xa54ff53a5f1d36f1, +0x510e527fade682d1, 0x9b05688c2b3e6c1f, 0x1f83d9abfb41bd6b, 0x5be0cd19137e2179 +}; + +void +sha512_start (sha512_context *ctx) +{ + ctx->total[0] = ctx->total[1] = 0; + memcpy (ctx->state, initial_state, 8 * sizeof(uint64_t)); +} + +void +sha512 (const unsigned char *input, unsigned int ilen, + unsigned char output[64]) +{ + sha512_context ctx; + + sha512_start (&ctx); + sha512_update (&ctx, input, ilen); + sha512_finish (&ctx, output); +} diff --git a/src/sha512.h b/src/sha512.h new file mode 100644 index 0000000..221f81e --- /dev/null +++ b/src/sha512.h @@ -0,0 +1,17 @@ +#define SHA512_DIGEST_SIZE 64 +#define SHA512_BLOCK_SIZE 128 + +typedef struct +{ + uint64_t total[2]; + uint64_t state[8]; + uint64_t wbuf[16]; +} sha512_context; + +void sha512 (const unsigned char *input, unsigned int ilen, + unsigned char output[64]); +void sha512_start (sha512_context *ctx); +void sha512_finish (sha512_context *ctx, unsigned char output[64]); +void sha512_update (sha512_context *ctx, const unsigned char *input, + unsigned int ilen); +void sha512_process (sha512_context *ctx);