c8329c9568
function old new delta sha512_end 182 204 +22 sha256_end 137 147 +10 sha1_hash 113 108 -5 sha1_end 143 129 -14 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/2 up/down: 32/-19) Total: 13 bytes
610 lines
16 KiB
C
610 lines
16 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Based on shasum from http://www.netsw.org/crypto/hash/
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* Majorly hacked up to use Dr Brian Gladman's sha1 code
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*
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* Copyright (C) 2002 Dr Brian Gladman <brg@gladman.me.uk>, Worcester, UK.
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* Copyright (C) 2003 Glenn L. McGrath
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* Copyright (C) 2003 Erik Andersen
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*
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* ---------------------------------------------------------------------------
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* Issue Date: 10/11/2002
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*
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* This is a byte oriented version of SHA1 that operates on arrays of bytes
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* stored in memory. It runs at 22 cycles per byte on a Pentium P4 processor
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*
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* ---------------------------------------------------------------------------
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*
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* SHA256 and SHA512 parts are:
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* Released into the Public Domain by Ulrich Drepper <drepper@redhat.com>.
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* Shrank by Denys Vlasenko.
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*
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* ---------------------------------------------------------------------------
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*
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* The best way to test random blocksizes is to go to coreutils/md5_sha1_sum.c
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* and replace "4096" with something like "2000 + time(NULL) % 2097",
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* then rebuild and compare "shaNNNsum bigfile" results.
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*/
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#include "libbb.h"
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#define rotl32(x,n) (((x) << (n)) | ((x) >> (32 - (n))))
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#define rotr32(x,n) (((x) >> (n)) | ((x) << (32 - (n))))
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/* for sha512: */
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#define rotr64(x,n) (((x) >> (n)) | ((x) << (64 - (n))))
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#if BB_LITTLE_ENDIAN
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static inline uint64_t hton64(uint64_t v)
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{
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return (((uint64_t)htonl(v)) << 32) | htonl(v >> 32);
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}
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#else
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#define hton64(v) (v)
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#endif
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#define ntoh64(v) hton64(v)
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/* To check alignment gcc has an appropriate operator. Other
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compilers don't. */
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#if defined(__GNUC__) && __GNUC__ >= 2
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# define UNALIGNED_P(p,type) (((uintptr_t) p) % __alignof__(type) != 0)
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#else
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# define UNALIGNED_P(p,type) (((uintptr_t) p) % sizeof(type) != 0)
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#endif
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#define SHA1_BLOCK_SIZE 64
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#define SHA1_MASK (SHA1_BLOCK_SIZE - 1)
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static void sha1_process_block64(sha1_ctx_t *ctx)
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{
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unsigned i;
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uint32_t w[80], a, b, c, d, e, t;
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uint32_t *words;
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words = (uint32_t*) ctx->wbuffer;
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for (i = 0; i < SHA1_BLOCK_SIZE / 4; ++i) {
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w[i] = ntohl(*words);
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words++;
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}
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for (/*i = SHA1_BLOCK_SIZE / 4*/; i < 80; ++i) {
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t = w[i - 3] ^ w[i - 8] ^ w[i - 14] ^ w[i - 16];
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w[i] = rotl32(t, 1);
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}
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a = ctx->hash[0];
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b = ctx->hash[1];
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c = ctx->hash[2];
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d = ctx->hash[3];
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e = ctx->hash[4];
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/* Reverse byte order in 32-bit words */
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#define ch(x,y,z) ((z) ^ ((x) & ((y) ^ (z))))
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#define parity(x,y,z) ((x) ^ (y) ^ (z))
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#define maj(x,y,z) (((x) & (y)) | ((z) & ((x) | (y))))
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/* A normal version as set out in the FIPS. This version uses */
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/* partial loop unrolling and is optimised for the Pentium 4 */
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#define rnd(f,k) \
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do { \
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t = a; a = rotl32(a,5) + f(b,c,d) + e + k + w[i]; \
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e = d; d = c; c = rotl32(b, 30); b = t; \
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} while (0)
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for (i = 0; i < 20; ++i)
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rnd(ch, 0x5a827999);
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for (/*i = 20*/; i < 40; ++i)
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rnd(parity, 0x6ed9eba1);
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for (/*i = 40*/; i < 60; ++i)
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rnd(maj, 0x8f1bbcdc);
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for (/*i = 60*/; i < 80; ++i)
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rnd(parity, 0xca62c1d6);
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#undef ch
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#undef parity
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#undef maj
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#undef rnd
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ctx->hash[0] += a;
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ctx->hash[1] += b;
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ctx->hash[2] += c;
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ctx->hash[3] += d;
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ctx->hash[4] += e;
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}
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/* Constants for SHA256 from FIPS 180-2:4.2.2. */
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static const uint32_t K256[80] = {
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0x428a2f98, 0x71374491,
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0xb5c0fbcf, 0xe9b5dba5,
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0x3956c25b, 0x59f111f1,
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0x923f82a4, 0xab1c5ed5,
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0xd807aa98, 0x12835b01,
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0x243185be, 0x550c7dc3,
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0x72be5d74, 0x80deb1fe,
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0x9bdc06a7, 0xc19bf174,
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0xe49b69c1, 0xefbe4786,
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0x0fc19dc6, 0x240ca1cc,
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0x2de92c6f, 0x4a7484aa,
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0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d,
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0xb00327c8, 0xbf597fc7,
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0xc6e00bf3, 0xd5a79147,
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0x06ca6351, 0x14292967,
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0x27b70a85, 0x2e1b2138,
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0x4d2c6dfc, 0x53380d13,
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0x650a7354, 0x766a0abb,
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0x81c2c92e, 0x92722c85,
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0xa2bfe8a1, 0xa81a664b,
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0xc24b8b70, 0xc76c51a3,
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0xd192e819, 0xd6990624,
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0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08,
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0x2748774c, 0x34b0bcb5,
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0x391c0cb3, 0x4ed8aa4a,
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0x5b9cca4f, 0x682e6ff3,
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0x748f82ee, 0x78a5636f,
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0x84c87814, 0x8cc70208,
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0x90befffa, 0xa4506ceb,
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0xbef9a3f7, 0xc67178f2,
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0xca273ece, 0xd186b8c7, /* [64]+ are used for sha512 only */
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0xeada7dd6, 0xf57d4f7f,
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0x06f067aa, 0x0a637dc5,
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0x113f9804, 0x1b710b35,
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0x28db77f5, 0x32caab7b,
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0x3c9ebe0a, 0x431d67c4,
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0x4cc5d4be, 0x597f299c,
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0x5fcb6fab, 0x6c44198c
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};
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/* Constants for SHA512 from FIPS 180-2:4.2.3. */
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static const uint32_t K512_lo[80] = {
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0xd728ae22, 0x23ef65cd,
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0xec4d3b2f, 0x8189dbbc,
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0xf348b538, 0xb605d019,
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0xaf194f9b, 0xda6d8118,
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0xa3030242, 0x45706fbe,
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0x4ee4b28c, 0xd5ffb4e2,
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0xf27b896f, 0x3b1696b1,
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0x25c71235, 0xcf692694,
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0x9ef14ad2, 0x384f25e3,
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0x8b8cd5b5, 0x77ac9c65,
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0x592b0275, 0x6ea6e483,
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0xbd41fbd4, 0x831153b5,
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0xee66dfab, 0x2db43210,
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0x98fb213f, 0xbeef0ee4,
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0x3da88fc2, 0x930aa725,
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0xe003826f, 0x0a0e6e70,
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0x46d22ffc, 0x5c26c926,
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0x5ac42aed, 0x9d95b3df,
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0x8baf63de, 0x3c77b2a8,
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0x47edaee6, 0x1482353b,
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0x4cf10364, 0xbc423001,
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0xd0f89791, 0x0654be30,
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0xd6ef5218, 0x5565a910,
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0x5771202a, 0x32bbd1b8,
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0xb8d2d0c8, 0x5141ab53,
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0xdf8eeb99, 0xe19b48a8,
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0xc5c95a63, 0xe3418acb,
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0x7763e373, 0xd6b2b8a3,
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0x5defb2fc, 0x43172f60,
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0xa1f0ab72, 0x1a6439ec,
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0x23631e28, 0xde82bde9,
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0xb2c67915, 0xe372532b,
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0xea26619c, 0x21c0c207,
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0xcde0eb1e, 0xee6ed178,
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0x72176fba, 0xa2c898a6,
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0xbef90dae, 0x131c471b,
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0x23047d84, 0x40c72493,
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0x15c9bebc, 0x9c100d4c,
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0xcb3e42b6, 0xfc657e2a,
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0x3ad6faec, 0x4a475817
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};
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/* Process LEN bytes of BUFFER, accumulating context into CTX.
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LEN is rounded _down_ to 64. */
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static void sha256_process_block64(const void *buffer, size_t len, sha256_ctx_t *ctx)
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{
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const uint32_t *words = buffer;
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uint32_t a = ctx->hash[0];
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uint32_t b = ctx->hash[1];
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uint32_t c = ctx->hash[2];
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uint32_t d = ctx->hash[3];
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uint32_t e = ctx->hash[4];
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uint32_t f = ctx->hash[5];
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uint32_t g = ctx->hash[6];
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uint32_t h = ctx->hash[7];
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/* Process all bytes in the buffer with 64 bytes in each round of
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the loop. */
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len /= (sizeof(uint32_t) * 16);
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while (len) {
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unsigned t;
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uint32_t W[64];
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/* Operators defined in FIPS 180-2:4.1.2. */
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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 S0(x) (rotr32(x, 2) ^ rotr32(x, 13) ^ rotr32(x, 22))
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#define S1(x) (rotr32(x, 6) ^ rotr32(x, 11) ^ rotr32(x, 25))
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#define R0(x) (rotr32(x, 7) ^ rotr32(x, 18) ^ (x >> 3))
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#define R1(x) (rotr32(x, 17) ^ rotr32(x, 19) ^ (x >> 10))
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/* Compute the message schedule according to FIPS 180-2:6.2.2 step 2. */
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for (t = 0; t < 16; ++t) {
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W[t] = ntohl(*words);
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words++;
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}
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for (/*t = 16*/; t < 64; ++t)
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W[t] = R1(W[t - 2]) + W[t - 7] + R0(W[t - 15]) + W[t - 16];
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/* The actual computation according to FIPS 180-2:6.2.2 step 3. */
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for (t = 0; t < 64; ++t) {
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uint32_t T1 = h + S1(e) + Ch(e, f, g) + K256[t] + W[t];
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uint32_t T2 = S0(a) + Maj(a, b, c);
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h = g;
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g = f;
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f = e;
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e = d + T1;
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d = c;
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c = b;
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b = a;
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a = T1 + T2;
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}
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#undef Ch
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#undef Maj
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#undef S0
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#undef S1
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#undef R0
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#undef R1
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/* Add the starting values of the context according to FIPS 180-2:6.2.2
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step 4. */
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ctx->hash[0] = a += ctx->hash[0];
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ctx->hash[1] = b += ctx->hash[1];
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ctx->hash[2] = c += ctx->hash[2];
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ctx->hash[3] = d += ctx->hash[3];
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ctx->hash[4] = e += ctx->hash[4];
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ctx->hash[5] = f += ctx->hash[5];
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ctx->hash[6] = g += ctx->hash[6];
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ctx->hash[7] = h += ctx->hash[7];
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/* Prepare for the next round. */
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len--;
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}
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}
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/* Process LEN bytes of BUFFER, accumulating context into CTX.
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LEN is rounded _down_ to 128. */
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static void sha512_process_block128(const void *buffer, size_t len, sha512_ctx_t *ctx)
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{
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const uint64_t *words = buffer;
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uint64_t a = ctx->hash[0];
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uint64_t b = ctx->hash[1];
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uint64_t c = ctx->hash[2];
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uint64_t d = ctx->hash[3];
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uint64_t e = ctx->hash[4];
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uint64_t f = ctx->hash[5];
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uint64_t g = ctx->hash[6];
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uint64_t h = ctx->hash[7];
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len /= (sizeof(uint64_t) * 16);
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while (len) {
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unsigned t;
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uint64_t W[80];
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/* Operators defined in FIPS 180-2:4.1.2. */
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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 S0(x) (rotr64(x, 28) ^ rotr64(x, 34) ^ rotr64(x, 39))
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#define S1(x) (rotr64(x, 14) ^ rotr64(x, 18) ^ rotr64(x, 41))
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#define R0(x) (rotr64(x, 1) ^ rotr64(x, 8) ^ (x >> 7))
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#define R1(x) (rotr64(x, 19) ^ rotr64(x, 61) ^ (x >> 6))
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/* Compute the message schedule according to FIPS 180-2:6.3.2 step 2. */
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for (t = 0; t < 16; ++t) {
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W[t] = ntoh64(*words);
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words++;
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}
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for (/*t = 16*/; t < 80; ++t)
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W[t] = R1(W[t - 2]) + W[t - 7] + R0(W[t - 15]) + W[t - 16];
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/* The actual computation according to FIPS 180-2:6.3.2 step 3. */
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for (t = 0; t < 80; ++t) {
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uint64_t K512_t = ((uint64_t)(K256[t]) << 32) + K512_lo[t];
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uint64_t T1 = h + S1(e) + Ch(e, f, g) + K512_t + W[t];
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uint64_t T2 = S0(a) + Maj(a, b, c);
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h = g;
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g = f;
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f = e;
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e = d + T1;
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d = c;
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c = b;
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b = a;
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a = T1 + T2;
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}
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#undef Ch
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#undef Maj
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#undef S0
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#undef S1
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#undef R0
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#undef R1
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/* Add the starting values of the context according to FIPS 180-2:6.3.2
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step 4. */
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ctx->hash[0] = a += ctx->hash[0];
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ctx->hash[1] = b += ctx->hash[1];
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ctx->hash[2] = c += ctx->hash[2];
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ctx->hash[3] = d += ctx->hash[3];
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ctx->hash[4] = e += ctx->hash[4];
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ctx->hash[5] = f += ctx->hash[5];
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ctx->hash[6] = g += ctx->hash[6];
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ctx->hash[7] = h += ctx->hash[7];
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len--;
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}
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}
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void FAST_FUNC sha1_begin(sha1_ctx_t *ctx)
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{
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ctx->total64 = 0;
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ctx->hash[0] = 0x67452301;
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ctx->hash[1] = 0xefcdab89;
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ctx->hash[2] = 0x98badcfe;
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ctx->hash[3] = 0x10325476;
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ctx->hash[4] = 0xc3d2e1f0;
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}
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static const uint32_t init256[] = {
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0x6a09e667,
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0xbb67ae85,
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0x3c6ef372,
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0xa54ff53a,
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0x510e527f,
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0x9b05688c,
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0x1f83d9ab,
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0x5be0cd19
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};
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static const uint32_t init512_lo[] = {
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0xf3bcc908,
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0x84caa73b,
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0xfe94f82b,
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0x5f1d36f1,
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0xade682d1,
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0x2b3e6c1f,
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0xfb41bd6b,
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0x137e2179
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};
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/* Initialize structure containing state of computation.
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(FIPS 180-2:5.3.2) */
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void FAST_FUNC sha256_begin(sha256_ctx_t *ctx)
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{
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memcpy(ctx->hash, init256, sizeof(init256));
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ctx->total64 = 0;
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}
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/* Initialize structure containing state of computation.
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(FIPS 180-2:5.3.3) */
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void FAST_FUNC sha512_begin(sha512_ctx_t *ctx)
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{
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int i;
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for (i = 0; i < 8; i++)
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ctx->hash[i] = ((uint64_t)(init256[i]) << 32) + init512_lo[i];
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ctx->total64[0] = ctx->total64[1] = 0;
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}
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void FAST_FUNC sha1_hash(const void *buffer, size_t len, sha1_ctx_t *ctx)
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{
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unsigned in_buf = ctx->total64 & SHA1_MASK;
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unsigned add = SHA1_BLOCK_SIZE - in_buf;
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ctx->total64 += len;
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while (len >= add) { /* transfer whole blocks while possible */
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memcpy(ctx->wbuffer + in_buf, buffer, add);
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buffer = (const char *)buffer + add;
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len -= add;
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add = SHA1_BLOCK_SIZE;
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in_buf = 0;
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sha1_process_block64(ctx);
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}
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memcpy(ctx->wbuffer + in_buf, buffer, len);
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}
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void FAST_FUNC sha256_hash(const void *buffer, size_t len, sha256_ctx_t *ctx)
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{
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unsigned in_buf = ctx->total64 & 63;
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/* First increment the byte count. FIPS 180-2 specifies the possible
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length of the file up to 2^64 _bits_.
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We compute the number of _bytes_ and convert to bits later. */
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ctx->total64 += len;
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/* When we already have some bits in our internal buffer concatenate
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|
both inputs first. */
|
|
if (in_buf != 0) {
|
|
unsigned add;
|
|
|
|
add = sizeof(ctx->wbuffer) - in_buf;
|
|
if (add > len)
|
|
add = len;
|
|
memcpy(ctx->wbuffer + in_buf, buffer, add);
|
|
in_buf += add;
|
|
|
|
/* If we still didn't collect full wbuffer, bail out */
|
|
if (in_buf < sizeof(ctx->wbuffer))
|
|
return;
|
|
|
|
sha256_process_block64(ctx->wbuffer, 64, ctx);
|
|
buffer = (const char *)buffer + add;
|
|
len -= add;
|
|
}
|
|
|
|
/* Process available complete blocks. */
|
|
if (len >= 64) {
|
|
if (UNALIGNED_P(buffer, uint32_t)) {
|
|
while (len >= 64) {
|
|
sha256_process_block64(memcpy(ctx->wbuffer, buffer, 64), 64, ctx);
|
|
buffer = (const char *)buffer + 64;
|
|
len -= 64;
|
|
}
|
|
} else {
|
|
sha256_process_block64(buffer, len /*& ~63*/, ctx);
|
|
buffer = (const char *)buffer + (len & ~63);
|
|
len &= 63;
|
|
}
|
|
}
|
|
|
|
/* Move remaining bytes into internal buffer. */
|
|
if (len > 0)
|
|
memcpy(ctx->wbuffer, buffer, len);
|
|
}
|
|
|
|
void FAST_FUNC sha512_hash(const void *buffer, size_t len, sha512_ctx_t *ctx)
|
|
{
|
|
unsigned in_buf = ctx->total64[0] & 127;
|
|
|
|
/* First increment the byte count. FIPS 180-2 specifies the possible
|
|
length of the file up to 2^128 _bits_.
|
|
We compute the number of _bytes_ and convert to bits later. */
|
|
ctx->total64[0] += len;
|
|
if (ctx->total64[0] < len)
|
|
ctx->total64[1]++;
|
|
|
|
if (in_buf != 0) {
|
|
unsigned add;
|
|
|
|
add = sizeof(ctx->wbuffer) - in_buf;
|
|
if (add > len)
|
|
add = len;
|
|
memcpy(ctx->wbuffer + in_buf, buffer, add);
|
|
in_buf += add;
|
|
|
|
if (in_buf < sizeof(ctx->wbuffer))
|
|
return;
|
|
|
|
sha512_process_block128(ctx->wbuffer, 128, ctx);
|
|
buffer = (const char *)buffer + add;
|
|
len -= add;
|
|
}
|
|
|
|
if (len >= 128) {
|
|
if (UNALIGNED_P(buffer, uint64_t)) {
|
|
while (len >= 128) {
|
|
sha512_process_block128(memcpy(ctx->wbuffer, buffer, 128), 128, ctx);
|
|
buffer = (const char *)buffer + 128;
|
|
len -= 128;
|
|
}
|
|
} else {
|
|
sha512_process_block128(buffer, len /*& ~127*/, ctx);
|
|
buffer = (const char *)buffer + (len & ~127);
|
|
len &= 127;
|
|
}
|
|
}
|
|
|
|
if (len > 0)
|
|
memcpy(ctx->wbuffer, buffer, len);
|
|
}
|
|
|
|
|
|
void FAST_FUNC sha1_end(void *resbuf, sha1_ctx_t *ctx)
|
|
{
|
|
unsigned i, pad, in_buf;
|
|
|
|
in_buf = ctx->total64 & SHA1_MASK;
|
|
/* Pad the buffer to the next 64-byte boundary with 0x80,0,0,0... */
|
|
ctx->wbuffer[in_buf++] = 0x80;
|
|
|
|
/* This loop iterates either once or twice, no more, no less */
|
|
while (1) {
|
|
pad = SHA1_BLOCK_SIZE - in_buf;
|
|
memset(ctx->wbuffer + in_buf, 0, pad);
|
|
in_buf = 0;
|
|
/* Do we have enough space for the length count? */
|
|
if (pad >= 8) {
|
|
/* Store the 64-bit counter of bits in the buffer in BE format */
|
|
uint64_t t = ctx->total64 << 3;
|
|
t = hton64(t);
|
|
/* wbuffer is suitably aligned for this */
|
|
*(uint64_t *) (&ctx->wbuffer[SHA1_BLOCK_SIZE - 8]) = t;
|
|
}
|
|
sha1_process_block64(ctx);
|
|
if (pad >= 8)
|
|
break;
|
|
}
|
|
|
|
/* This way we do not impose alignment constraints on resbuf: */
|
|
#if BB_LITTLE_ENDIAN
|
|
for (i = 0; i < ARRAY_SIZE(ctx->hash); ++i)
|
|
ctx->hash[i] = htonl(ctx->hash[i]);
|
|
#endif
|
|
memcpy(resbuf, ctx->hash, sizeof(ctx->hash));
|
|
}
|
|
|
|
void FAST_FUNC sha256_end(void *resbuf, sha256_ctx_t *ctx)
|
|
{
|
|
unsigned i, pad, in_buf;
|
|
|
|
in_buf = ctx->total64 & 63;
|
|
/* Pad the buffer to the next 64-byte boundary with 0x80,0,0,0...
|
|
* (FIPS 180-2:5.1.1)
|
|
*/
|
|
ctx->wbuffer[in_buf++] = 0x80;
|
|
|
|
while (1) {
|
|
pad = 64 - in_buf;
|
|
memset(ctx->wbuffer + in_buf, 0, pad);
|
|
in_buf = 0;
|
|
if (pad >= 8) {
|
|
uint64_t t = ctx->total64 << 3;
|
|
t = hton64(t);
|
|
*(uint64_t *) (&ctx->wbuffer[64 - 8]) = t;
|
|
}
|
|
sha256_process_block64(ctx->wbuffer, 64, ctx);
|
|
if (pad >= 8)
|
|
break;
|
|
}
|
|
|
|
#if BB_LITTLE_ENDIAN
|
|
for (i = 0; i < ARRAY_SIZE(ctx->hash); ++i)
|
|
ctx->hash[i] = htonl(ctx->hash[i]);
|
|
#endif
|
|
memcpy(resbuf, ctx->hash, sizeof(ctx->hash));
|
|
}
|
|
|
|
void FAST_FUNC sha512_end(void *resbuf, sha512_ctx_t *ctx)
|
|
{
|
|
unsigned i, pad, in_buf;
|
|
|
|
in_buf = ctx->total64[0] & 127;
|
|
/* Pad the buffer to the next 128-byte boundary with 0x80,0,0,0...
|
|
* (FIPS 180-2:5.1.2)
|
|
*/
|
|
ctx->wbuffer[in_buf++] = 0x80;
|
|
|
|
while (1) {
|
|
pad = 128 - in_buf;
|
|
memset(ctx->wbuffer + in_buf, 0, pad);
|
|
in_buf = 0;
|
|
if (pad >= 16) {
|
|
/* Store the 128-bit counter of bits in the buffer in BE format */
|
|
uint64_t t;
|
|
t = ctx->total64[0] << 3;
|
|
t = hton64(t);
|
|
*(uint64_t *) (&ctx->wbuffer[128 - 8]) = t;
|
|
t = (ctx->total64[1] << 3) | (ctx->total64[0] >> 61);
|
|
t = hton64(t);
|
|
*(uint64_t *) (&ctx->wbuffer[128 - 16]) = t;
|
|
}
|
|
sha512_process_block128(ctx->wbuffer, 128, ctx);
|
|
if (pad >= 16)
|
|
break;
|
|
}
|
|
|
|
#if BB_LITTLE_ENDIAN
|
|
for (i = 0; i < ARRAY_SIZE(ctx->hash); ++i)
|
|
ctx->hash[i] = hton64(ctx->hash[i]);
|
|
#endif
|
|
memcpy(resbuf, ctx->hash, sizeof(ctx->hash));
|
|
}
|