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899 lines
24 KiB
C
899 lines
24 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) 2010 Denys Vlasenko
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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#include "libbb.h"
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/* gcc 4.2.1 optimizes rotr64 better with inline than with macro
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* (for rotX32, there is no difference). Why? My guess is that
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* macro requires clever common subexpression elimination heuristics
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* in gcc, while inline basically forces it to happen.
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*/
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//#define rotl32(x,n) (((x) << (n)) | ((x) >> (32 - (n))))
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static ALWAYS_INLINE uint32_t rotl32(uint32_t x, unsigned n)
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{
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return (x << n) | (x >> (32 - n));
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}
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//#define rotr32(x,n) (((x) >> (n)) | ((x) << (32 - (n))))
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static ALWAYS_INLINE uint32_t rotr32(uint32_t x, unsigned n)
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{
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return (x >> n) | (x << (32 - n));
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}
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/* rotr64 in needed for sha512 only: */
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//#define rotr64(x,n) (((x) >> (n)) | ((x) << (64 - (n))))
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static ALWAYS_INLINE uint64_t rotr64(uint64_t x, unsigned n)
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{
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return (x >> n) | (x << (64 - n));
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}
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/* Feed data through a temporary buffer.
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* The internal buffer remembers previous data until it has 64
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* bytes worth to pass on.
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*/
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static void FAST_FUNC common64_hash(md5_ctx_t *ctx, const void *buffer, size_t len)
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{
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unsigned bufpos = ctx->total64 & 63;
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ctx->total64 += len;
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while (1) {
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unsigned remaining = 64 - bufpos;
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if (remaining > len)
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remaining = len;
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/* Copy data into aligned buffer */
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memcpy(ctx->wbuffer + bufpos, buffer, remaining);
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len -= remaining;
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buffer = (const char *)buffer + remaining;
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bufpos += remaining;
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/* clever way to do "if (bufpos != 64) break; ... ; bufpos = 0;" */
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bufpos -= 64;
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if (bufpos != 0)
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break;
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/* Buffer is filled up, process it */
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ctx->process_block(ctx);
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/*bufpos = 0; - already is */
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}
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}
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/* Process the remaining bytes in the buffer */
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static void FAST_FUNC common64_end(md5_ctx_t *ctx, int swap_needed)
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{
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unsigned bufpos = ctx->total64 & 63;
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/* Pad the buffer to the next 64-byte boundary with 0x80,0,0,0... */
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ctx->wbuffer[bufpos++] = 0x80;
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/* This loop iterates either once or twice, no more, no less */
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while (1) {
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unsigned remaining = 64 - bufpos;
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memset(ctx->wbuffer + bufpos, 0, remaining);
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/* Do we have enough space for the length count? */
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if (remaining >= 8) {
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/* Store the 64-bit counter of bits in the buffer */
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uint64_t t = ctx->total64 << 3;
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if (swap_needed)
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t = bb_bswap_64(t);
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/* wbuffer is suitably aligned for this */
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*(uint64_t *) (&ctx->wbuffer[64 - 8]) = t;
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}
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ctx->process_block(ctx);
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if (remaining >= 8)
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break;
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bufpos = 0;
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}
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}
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/*
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* Compute MD5 checksum of strings according to the
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* definition of MD5 in RFC 1321 from April 1992.
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*
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* Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
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*
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* Copyright (C) 1995-1999 Free Software Foundation, Inc.
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* Copyright (C) 2001 Manuel Novoa III
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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 source tree.
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*/
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/* 0: fastest, 3: smallest */
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#if CONFIG_MD5_SIZE_VS_SPEED < 0
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# define MD5_SIZE_VS_SPEED 0
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#elif CONFIG_MD5_SIZE_VS_SPEED > 3
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# define MD5_SIZE_VS_SPEED 3
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#else
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# define MD5_SIZE_VS_SPEED CONFIG_MD5_SIZE_VS_SPEED
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#endif
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/* These are the four functions used in the four steps of the MD5 algorithm
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* and defined in the RFC 1321. The first function is a little bit optimized
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* (as found in Colin Plumbs public domain implementation).
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* #define FF(b, c, d) ((b & c) | (~b & d))
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*/
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#undef FF
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#undef FG
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#undef FH
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#undef FI
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#define FF(b, c, d) (d ^ (b & (c ^ d)))
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#define FG(b, c, d) FF(d, b, c)
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#define FH(b, c, d) (b ^ c ^ d)
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#define FI(b, c, d) (c ^ (b | ~d))
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/* Hash a single block, 64 bytes long and 4-byte aligned */
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static void FAST_FUNC md5_process_block64(md5_ctx_t *ctx)
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{
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#if MD5_SIZE_VS_SPEED > 0
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/* Before we start, one word to the strange constants.
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They are defined in RFC 1321 as
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T[i] = (int)(4294967296.0 * fabs(sin(i))), i=1..64
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*/
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static const uint32_t C_array[] = {
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/* round 1 */
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0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
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0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
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0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
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0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
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/* round 2 */
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0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
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0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
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0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
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0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
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/* round 3 */
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0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
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0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
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0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x4881d05,
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0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
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/* round 4 */
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0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
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0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
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0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
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0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391
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};
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static const char P_array[] ALIGN1 = {
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# if MD5_SIZE_VS_SPEED > 1
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, /* 1 */
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# endif
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1, 6, 11, 0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, /* 2 */
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5, 8, 11, 14, 1, 4, 7, 10, 13, 0, 3, 6, 9, 12, 15, 2, /* 3 */
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0, 7, 14, 5, 12, 3, 10, 1, 8, 15, 6, 13, 4, 11, 2, 9 /* 4 */
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};
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#endif
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uint32_t *words = (void*) ctx->wbuffer;
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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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#if MD5_SIZE_VS_SPEED >= 2 /* 2 or 3 */
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static const char S_array[] ALIGN1 = {
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7, 12, 17, 22,
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5, 9, 14, 20,
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4, 11, 16, 23,
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6, 10, 15, 21
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};
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const uint32_t *pc;
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const char *pp;
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const char *ps;
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int i;
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uint32_t temp;
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# if BB_BIG_ENDIAN
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for (i = 0; i < 16; i++)
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words[i] = SWAP_LE32(words[i]);
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# endif
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# if MD5_SIZE_VS_SPEED == 3
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pc = C_array;
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pp = P_array;
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ps = S_array - 4;
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for (i = 0; i < 64; i++) {
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if ((i & 0x0f) == 0)
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ps += 4;
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temp = A;
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switch (i >> 4) {
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case 0:
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temp += FF(B, C, D);
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break;
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case 1:
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temp += FG(B, C, D);
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break;
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case 2:
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temp += FH(B, C, D);
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break;
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case 3:
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temp += FI(B, C, D);
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}
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temp += words[(int) (*pp++)] + *pc++;
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temp = rotl32(temp, ps[i & 3]);
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temp += B;
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A = D;
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D = C;
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C = B;
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B = temp;
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}
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# else /* MD5_SIZE_VS_SPEED == 2 */
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pc = C_array;
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pp = P_array;
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ps = S_array;
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for (i = 0; i < 16; i++) {
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temp = A + FF(B, C, D) + words[(int) (*pp++)] + *pc++;
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temp = rotl32(temp, ps[i & 3]);
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temp += B;
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A = D;
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D = C;
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C = B;
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B = temp;
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}
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ps += 4;
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for (i = 0; i < 16; i++) {
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temp = A + FG(B, C, D) + words[(int) (*pp++)] + *pc++;
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temp = rotl32(temp, ps[i & 3]);
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temp += B;
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A = D;
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D = C;
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C = B;
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B = temp;
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}
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ps += 4;
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for (i = 0; i < 16; i++) {
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temp = A + FH(B, C, D) + words[(int) (*pp++)] + *pc++;
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temp = rotl32(temp, ps[i & 3]);
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temp += B;
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A = D;
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D = C;
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C = B;
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B = temp;
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}
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ps += 4;
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for (i = 0; i < 16; i++) {
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temp = A + FI(B, C, D) + words[(int) (*pp++)] + *pc++;
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temp = rotl32(temp, ps[i & 3]);
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temp += B;
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A = D;
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D = C;
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C = B;
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B = temp;
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}
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# endif
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/* Add checksum to the starting values */
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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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#else /* MD5_SIZE_VS_SPEED == 0 or 1 */
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uint32_t A_save = A;
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uint32_t B_save = B;
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uint32_t C_save = C;
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uint32_t D_save = D;
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# if MD5_SIZE_VS_SPEED == 1
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const uint32_t *pc;
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const char *pp;
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int i;
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# endif
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/* First round: using the given function, the context and a constant
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the next context is computed. Because the algorithm's processing
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unit is a 32-bit word and it is determined to work on words in
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little endian byte order we perhaps have to change the byte order
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before the computation. To reduce the work for the next steps
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we save swapped words in WORDS array. */
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# undef OP
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# define OP(a, b, c, d, s, T) \
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do { \
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a += FF(b, c, d) + (*words IF_BIG_ENDIAN(= SWAP_LE32(*words))) + T; \
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words++; \
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a = rotl32(a, s); \
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a += b; \
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} while (0)
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/* Round 1 */
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# if MD5_SIZE_VS_SPEED == 1
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pc = C_array;
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for (i = 0; i < 4; i++) {
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OP(A, B, C, D, 7, *pc++);
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OP(D, A, B, C, 12, *pc++);
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OP(C, D, A, B, 17, *pc++);
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OP(B, C, D, A, 22, *pc++);
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}
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# else
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OP(A, B, C, D, 7, 0xd76aa478);
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OP(D, A, B, C, 12, 0xe8c7b756);
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OP(C, D, A, B, 17, 0x242070db);
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OP(B, C, D, A, 22, 0xc1bdceee);
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OP(A, B, C, D, 7, 0xf57c0faf);
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OP(D, A, B, C, 12, 0x4787c62a);
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OP(C, D, A, B, 17, 0xa8304613);
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OP(B, C, D, A, 22, 0xfd469501);
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OP(A, B, C, D, 7, 0x698098d8);
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OP(D, A, B, C, 12, 0x8b44f7af);
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OP(C, D, A, B, 17, 0xffff5bb1);
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OP(B, C, D, A, 22, 0x895cd7be);
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OP(A, B, C, D, 7, 0x6b901122);
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OP(D, A, B, C, 12, 0xfd987193);
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OP(C, D, A, B, 17, 0xa679438e);
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OP(B, C, D, A, 22, 0x49b40821);
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# endif
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words -= 16;
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/* For the second to fourth round we have the possibly swapped words
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in WORDS. Redefine the macro to take an additional first
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argument specifying the function to use. */
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# undef OP
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# define OP(f, a, b, c, d, k, s, T) \
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do { \
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a += f(b, c, d) + words[k] + T; \
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a = rotl32(a, s); \
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a += b; \
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} while (0)
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/* Round 2 */
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# if MD5_SIZE_VS_SPEED == 1
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pp = P_array;
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for (i = 0; i < 4; i++) {
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OP(FG, A, B, C, D, (int) (*pp++), 5, *pc++);
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OP(FG, D, A, B, C, (int) (*pp++), 9, *pc++);
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OP(FG, C, D, A, B, (int) (*pp++), 14, *pc++);
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OP(FG, B, C, D, A, (int) (*pp++), 20, *pc++);
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}
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# else
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OP(FG, A, B, C, D, 1, 5, 0xf61e2562);
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OP(FG, D, A, B, C, 6, 9, 0xc040b340);
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OP(FG, C, D, A, B, 11, 14, 0x265e5a51);
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OP(FG, B, C, D, A, 0, 20, 0xe9b6c7aa);
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OP(FG, A, B, C, D, 5, 5, 0xd62f105d);
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OP(FG, D, A, B, C, 10, 9, 0x02441453);
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OP(FG, C, D, A, B, 15, 14, 0xd8a1e681);
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OP(FG, B, C, D, A, 4, 20, 0xe7d3fbc8);
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OP(FG, A, B, C, D, 9, 5, 0x21e1cde6);
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OP(FG, D, A, B, C, 14, 9, 0xc33707d6);
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OP(FG, C, D, A, B, 3, 14, 0xf4d50d87);
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OP(FG, B, C, D, A, 8, 20, 0x455a14ed);
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OP(FG, A, B, C, D, 13, 5, 0xa9e3e905);
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OP(FG, D, A, B, C, 2, 9, 0xfcefa3f8);
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OP(FG, C, D, A, B, 7, 14, 0x676f02d9);
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OP(FG, B, C, D, A, 12, 20, 0x8d2a4c8a);
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# endif
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/* Round 3 */
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# if MD5_SIZE_VS_SPEED == 1
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for (i = 0; i < 4; i++) {
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OP(FH, A, B, C, D, (int) (*pp++), 4, *pc++);
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OP(FH, D, A, B, C, (int) (*pp++), 11, *pc++);
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OP(FH, C, D, A, B, (int) (*pp++), 16, *pc++);
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OP(FH, B, C, D, A, (int) (*pp++), 23, *pc++);
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}
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# else
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OP(FH, A, B, C, D, 5, 4, 0xfffa3942);
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OP(FH, D, A, B, C, 8, 11, 0x8771f681);
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OP(FH, C, D, A, B, 11, 16, 0x6d9d6122);
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OP(FH, B, C, D, A, 14, 23, 0xfde5380c);
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OP(FH, A, B, C, D, 1, 4, 0xa4beea44);
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OP(FH, D, A, B, C, 4, 11, 0x4bdecfa9);
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OP(FH, C, D, A, B, 7, 16, 0xf6bb4b60);
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OP(FH, B, C, D, A, 10, 23, 0xbebfbc70);
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OP(FH, A, B, C, D, 13, 4, 0x289b7ec6);
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OP(FH, D, A, B, C, 0, 11, 0xeaa127fa);
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OP(FH, C, D, A, B, 3, 16, 0xd4ef3085);
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OP(FH, B, C, D, A, 6, 23, 0x04881d05);
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OP(FH, A, B, C, D, 9, 4, 0xd9d4d039);
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OP(FH, D, A, B, C, 12, 11, 0xe6db99e5);
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OP(FH, C, D, A, B, 15, 16, 0x1fa27cf8);
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OP(FH, B, C, D, A, 2, 23, 0xc4ac5665);
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# endif
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/* Round 4 */
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# if MD5_SIZE_VS_SPEED == 1
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for (i = 0; i < 4; i++) {
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OP(FI, A, B, C, D, (int) (*pp++), 6, *pc++);
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OP(FI, D, A, B, C, (int) (*pp++), 10, *pc++);
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OP(FI, C, D, A, B, (int) (*pp++), 15, *pc++);
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OP(FI, B, C, D, A, (int) (*pp++), 21, *pc++);
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}
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# else
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OP(FI, A, B, C, D, 0, 6, 0xf4292244);
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OP(FI, D, A, B, C, 7, 10, 0x432aff97);
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OP(FI, C, D, A, B, 14, 15, 0xab9423a7);
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OP(FI, B, C, D, A, 5, 21, 0xfc93a039);
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OP(FI, A, B, C, D, 12, 6, 0x655b59c3);
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OP(FI, D, A, B, C, 3, 10, 0x8f0ccc92);
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OP(FI, C, D, A, B, 10, 15, 0xffeff47d);
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OP(FI, B, C, D, A, 1, 21, 0x85845dd1);
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OP(FI, A, B, C, D, 8, 6, 0x6fa87e4f);
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OP(FI, D, A, B, C, 15, 10, 0xfe2ce6e0);
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|
OP(FI, C, D, A, B, 6, 15, 0xa3014314);
|
|
OP(FI, B, C, D, A, 13, 21, 0x4e0811a1);
|
|
OP(FI, A, B, C, D, 4, 6, 0xf7537e82);
|
|
OP(FI, D, A, B, C, 11, 10, 0xbd3af235);
|
|
OP(FI, C, D, A, B, 2, 15, 0x2ad7d2bb);
|
|
OP(FI, B, C, D, A, 9, 21, 0xeb86d391);
|
|
# undef OP
|
|
# endif
|
|
/* Add checksum to the starting values */
|
|
ctx->hash[0] = A_save + A;
|
|
ctx->hash[1] = B_save + B;
|
|
ctx->hash[2] = C_save + C;
|
|
ctx->hash[3] = D_save + D;
|
|
#endif
|
|
}
|
|
#undef FF
|
|
#undef FG
|
|
#undef FH
|
|
#undef FI
|
|
|
|
/* Initialize structure containing state of computation.
|
|
* (RFC 1321, 3.3: Step 3)
|
|
*/
|
|
void FAST_FUNC md5_begin(md5_ctx_t *ctx)
|
|
{
|
|
ctx->hash[0] = 0x67452301;
|
|
ctx->hash[1] = 0xefcdab89;
|
|
ctx->hash[2] = 0x98badcfe;
|
|
ctx->hash[3] = 0x10325476;
|
|
ctx->total64 = 0;
|
|
ctx->process_block = md5_process_block64;
|
|
}
|
|
|
|
/* Used also for sha1 and sha256 */
|
|
void FAST_FUNC md5_hash(md5_ctx_t *ctx, const void *buffer, size_t len)
|
|
{
|
|
common64_hash(ctx, buffer, len);
|
|
}
|
|
|
|
/* Process the remaining bytes in the buffer and put result from CTX
|
|
* in first 16 bytes following RESBUF. The result is always in little
|
|
* endian byte order, so that a byte-wise output yields to the wanted
|
|
* ASCII representation of the message digest.
|
|
*/
|
|
void FAST_FUNC md5_end(md5_ctx_t *ctx, void *resbuf)
|
|
{
|
|
/* MD5 stores total in LE, need to swap on BE arches: */
|
|
common64_end(ctx, /*swap_needed:*/ BB_BIG_ENDIAN);
|
|
|
|
/* The MD5 result is in little endian byte order */
|
|
#if BB_BIG_ENDIAN
|
|
ctx->hash[0] = SWAP_LE32(ctx->hash[0]);
|
|
ctx->hash[1] = SWAP_LE32(ctx->hash[1]);
|
|
ctx->hash[2] = SWAP_LE32(ctx->hash[2]);
|
|
ctx->hash[3] = SWAP_LE32(ctx->hash[3]);
|
|
#endif
|
|
memcpy(resbuf, ctx->hash, sizeof(ctx->hash[0]) * 4);
|
|
}
|
|
|
|
|
|
/*
|
|
* SHA1 part is:
|
|
* Copyright 2007 Rob Landley <rob@landley.net>
|
|
*
|
|
* Based on the public domain SHA-1 in C by Steve Reid <steve@edmweb.com>
|
|
* from http://www.mirrors.wiretapped.net/security/cryptography/hashes/sha1/
|
|
*
|
|
* Licensed under GPLv2, see file LICENSE in this source tree.
|
|
*
|
|
* ---------------------------------------------------------------------------
|
|
*
|
|
* SHA256 and SHA512 parts are:
|
|
* Released into the Public Domain by Ulrich Drepper <drepper@redhat.com>.
|
|
* Shrank by Denys Vlasenko.
|
|
*
|
|
* ---------------------------------------------------------------------------
|
|
*
|
|
* The best way to test random blocksizes is to go to coreutils/md5_sha1_sum.c
|
|
* and replace "4096" with something like "2000 + time(NULL) % 2097",
|
|
* then rebuild and compare "shaNNNsum bigfile" results.
|
|
*/
|
|
|
|
static void FAST_FUNC sha1_process_block64(sha1_ctx_t *ctx)
|
|
{
|
|
static const uint32_t rconsts[] = {
|
|
0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xCA62C1D6
|
|
};
|
|
int i, j;
|
|
int cnt;
|
|
uint32_t W[16+16];
|
|
uint32_t a, b, c, d, e;
|
|
|
|
/* On-stack work buffer frees up one register in the main loop
|
|
* which otherwise will be needed to hold ctx pointer */
|
|
for (i = 0; i < 16; i++)
|
|
W[i] = W[i+16] = SWAP_BE32(((uint32_t*)ctx->wbuffer)[i]);
|
|
|
|
a = ctx->hash[0];
|
|
b = ctx->hash[1];
|
|
c = ctx->hash[2];
|
|
d = ctx->hash[3];
|
|
e = ctx->hash[4];
|
|
|
|
/* 4 rounds of 20 operations each */
|
|
cnt = 0;
|
|
for (i = 0; i < 4; i++) {
|
|
j = 19;
|
|
do {
|
|
uint32_t work;
|
|
|
|
work = c ^ d;
|
|
if (i == 0) {
|
|
work = (work & b) ^ d;
|
|
if (j <= 3)
|
|
goto ge16;
|
|
/* Used to do SWAP_BE32 here, but this
|
|
* requires ctx (see comment above) */
|
|
work += W[cnt];
|
|
} else {
|
|
if (i == 2)
|
|
work = ((b | c) & d) | (b & c);
|
|
else /* i = 1 or 3 */
|
|
work ^= b;
|
|
ge16:
|
|
W[cnt] = W[cnt+16] = rotl32(W[cnt+13] ^ W[cnt+8] ^ W[cnt+2] ^ W[cnt], 1);
|
|
work += W[cnt];
|
|
}
|
|
work += e + rotl32(a, 5) + rconsts[i];
|
|
|
|
/* Rotate by one for next time */
|
|
e = d;
|
|
d = c;
|
|
c = /* b = */ rotl32(b, 30);
|
|
b = a;
|
|
a = work;
|
|
cnt = (cnt + 1) & 15;
|
|
} while (--j >= 0);
|
|
}
|
|
|
|
ctx->hash[0] += a;
|
|
ctx->hash[1] += b;
|
|
ctx->hash[2] += c;
|
|
ctx->hash[3] += d;
|
|
ctx->hash[4] += e;
|
|
}
|
|
|
|
/* Constants for SHA512 from FIPS 180-2:4.2.3.
|
|
* SHA256 constants from FIPS 180-2:4.2.2
|
|
* are the most significant half of first 64 elements
|
|
* of the same array.
|
|
*/
|
|
static const uint64_t sha_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, /* [64]+ are used for sha512 only */
|
|
0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
|
|
0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
|
|
0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
|
|
0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
|
|
0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
|
|
0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
|
|
0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
|
|
};
|
|
|
|
#undef Ch
|
|
#undef Maj
|
|
#undef S0
|
|
#undef S1
|
|
#undef R0
|
|
#undef R1
|
|
|
|
static void FAST_FUNC sha256_process_block64(sha256_ctx_t *ctx)
|
|
{
|
|
unsigned t;
|
|
uint32_t W[64], a, b, c, d, e, f, g, h;
|
|
const uint32_t *words = (uint32_t*) ctx->wbuffer;
|
|
|
|
/* Operators defined in FIPS 180-2:4.1.2. */
|
|
#define Ch(x, y, z) ((x & y) ^ (~x & z))
|
|
#define Maj(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
|
|
#define S0(x) (rotr32(x, 2) ^ rotr32(x, 13) ^ rotr32(x, 22))
|
|
#define S1(x) (rotr32(x, 6) ^ rotr32(x, 11) ^ rotr32(x, 25))
|
|
#define R0(x) (rotr32(x, 7) ^ rotr32(x, 18) ^ (x >> 3))
|
|
#define R1(x) (rotr32(x, 17) ^ rotr32(x, 19) ^ (x >> 10))
|
|
|
|
/* Compute the message schedule according to FIPS 180-2:6.2.2 step 2. */
|
|
for (t = 0; t < 16; ++t)
|
|
W[t] = SWAP_BE32(words[t]);
|
|
for (/*t = 16*/; t < 64; ++t)
|
|
W[t] = R1(W[t - 2]) + W[t - 7] + R0(W[t - 15]) + W[t - 16];
|
|
|
|
a = ctx->hash[0];
|
|
b = ctx->hash[1];
|
|
c = ctx->hash[2];
|
|
d = ctx->hash[3];
|
|
e = ctx->hash[4];
|
|
f = ctx->hash[5];
|
|
g = ctx->hash[6];
|
|
h = ctx->hash[7];
|
|
|
|
/* The actual computation according to FIPS 180-2:6.2.2 step 3. */
|
|
for (t = 0; t < 64; ++t) {
|
|
/* Need to fetch upper half of sha_K[t]
|
|
* (I hope compiler is clever enough to just fetch
|
|
* upper half)
|
|
*/
|
|
uint32_t K_t = sha_K[t] >> 32;
|
|
uint32_t T1 = h + S1(e) + Ch(e, f, g) + K_t + W[t];
|
|
uint32_t T2 = S0(a) + Maj(a, b, c);
|
|
h = g;
|
|
g = f;
|
|
f = e;
|
|
e = d + T1;
|
|
d = c;
|
|
c = b;
|
|
b = a;
|
|
a = T1 + T2;
|
|
}
|
|
#undef Ch
|
|
#undef Maj
|
|
#undef S0
|
|
#undef S1
|
|
#undef R0
|
|
#undef R1
|
|
/* Add the starting values of the context according to FIPS 180-2:6.2.2
|
|
step 4. */
|
|
ctx->hash[0] += a;
|
|
ctx->hash[1] += b;
|
|
ctx->hash[2] += c;
|
|
ctx->hash[3] += d;
|
|
ctx->hash[4] += e;
|
|
ctx->hash[5] += f;
|
|
ctx->hash[6] += g;
|
|
ctx->hash[7] += h;
|
|
}
|
|
|
|
static void FAST_FUNC sha512_process_block128(sha512_ctx_t *ctx)
|
|
{
|
|
unsigned t;
|
|
uint64_t W[80];
|
|
/* On i386, having assignments here (not later as sha256 does)
|
|
* produces 99 bytes smaller code with gcc 4.3.1
|
|
*/
|
|
uint64_t a = ctx->hash[0];
|
|
uint64_t b = ctx->hash[1];
|
|
uint64_t c = ctx->hash[2];
|
|
uint64_t d = ctx->hash[3];
|
|
uint64_t e = ctx->hash[4];
|
|
uint64_t f = ctx->hash[5];
|
|
uint64_t g = ctx->hash[6];
|
|
uint64_t h = ctx->hash[7];
|
|
const uint64_t *words = (uint64_t*) ctx->wbuffer;
|
|
|
|
/* Operators defined in FIPS 180-2:4.1.2. */
|
|
#define Ch(x, y, z) ((x & y) ^ (~x & z))
|
|
#define Maj(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
|
|
#define S0(x) (rotr64(x, 28) ^ rotr64(x, 34) ^ rotr64(x, 39))
|
|
#define S1(x) (rotr64(x, 14) ^ rotr64(x, 18) ^ rotr64(x, 41))
|
|
#define R0(x) (rotr64(x, 1) ^ rotr64(x, 8) ^ (x >> 7))
|
|
#define R1(x) (rotr64(x, 19) ^ rotr64(x, 61) ^ (x >> 6))
|
|
|
|
/* Compute the message schedule according to FIPS 180-2:6.3.2 step 2. */
|
|
for (t = 0; t < 16; ++t)
|
|
W[t] = SWAP_BE64(words[t]);
|
|
for (/*t = 16*/; t < 80; ++t)
|
|
W[t] = R1(W[t - 2]) + W[t - 7] + R0(W[t - 15]) + W[t - 16];
|
|
|
|
/* The actual computation according to FIPS 180-2:6.3.2 step 3. */
|
|
for (t = 0; t < 80; ++t) {
|
|
uint64_t T1 = h + S1(e) + Ch(e, f, g) + sha_K[t] + W[t];
|
|
uint64_t T2 = S0(a) + Maj(a, b, c);
|
|
h = g;
|
|
g = f;
|
|
f = e;
|
|
e = d + T1;
|
|
d = c;
|
|
c = b;
|
|
b = a;
|
|
a = T1 + T2;
|
|
}
|
|
#undef Ch
|
|
#undef Maj
|
|
#undef S0
|
|
#undef S1
|
|
#undef R0
|
|
#undef R1
|
|
/* Add the starting values of the context according to FIPS 180-2:6.3.2
|
|
step 4. */
|
|
ctx->hash[0] += a;
|
|
ctx->hash[1] += b;
|
|
ctx->hash[2] += c;
|
|
ctx->hash[3] += d;
|
|
ctx->hash[4] += e;
|
|
ctx->hash[5] += f;
|
|
ctx->hash[6] += g;
|
|
ctx->hash[7] += h;
|
|
}
|
|
|
|
|
|
void FAST_FUNC sha1_begin(sha1_ctx_t *ctx)
|
|
{
|
|
ctx->hash[0] = 0x67452301;
|
|
ctx->hash[1] = 0xefcdab89;
|
|
ctx->hash[2] = 0x98badcfe;
|
|
ctx->hash[3] = 0x10325476;
|
|
ctx->hash[4] = 0xc3d2e1f0;
|
|
ctx->total64 = 0;
|
|
ctx->process_block = sha1_process_block64;
|
|
}
|
|
|
|
static const uint32_t init256[] = {
|
|
0,
|
|
0,
|
|
0x6a09e667,
|
|
0xbb67ae85,
|
|
0x3c6ef372,
|
|
0xa54ff53a,
|
|
0x510e527f,
|
|
0x9b05688c,
|
|
0x1f83d9ab,
|
|
0x5be0cd19,
|
|
};
|
|
static const uint32_t init512_lo[] = {
|
|
0,
|
|
0,
|
|
0xf3bcc908,
|
|
0x84caa73b,
|
|
0xfe94f82b,
|
|
0x5f1d36f1,
|
|
0xade682d1,
|
|
0x2b3e6c1f,
|
|
0xfb41bd6b,
|
|
0x137e2179,
|
|
};
|
|
|
|
/* Initialize structure containing state of computation.
|
|
(FIPS 180-2:5.3.2) */
|
|
void FAST_FUNC sha256_begin(sha256_ctx_t *ctx)
|
|
{
|
|
memcpy(&ctx->total64, init256, sizeof(init256));
|
|
/*ctx->total64 = 0; - done by prepending two 32-bit zeros to init256 */
|
|
ctx->process_block = sha256_process_block64;
|
|
}
|
|
|
|
/* Initialize structure containing state of computation.
|
|
(FIPS 180-2:5.3.3) */
|
|
void FAST_FUNC sha512_begin(sha512_ctx_t *ctx)
|
|
{
|
|
int i;
|
|
/* Two extra iterations zero out ctx->total64[2] */
|
|
uint64_t *tp = ctx->total64;
|
|
for (i = 0; i < 2+8; i++)
|
|
tp[i] = ((uint64_t)(init256[i]) << 32) + init512_lo[i];
|
|
/*ctx->total64[0] = ctx->total64[1] = 0; - already done */
|
|
}
|
|
|
|
void FAST_FUNC sha512_hash(sha512_ctx_t *ctx, const void *buffer, size_t len)
|
|
{
|
|
unsigned bufpos = ctx->total64[0] & 127;
|
|
unsigned remaining;
|
|
|
|
/* 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 0
|
|
remaining = 128 - bufpos;
|
|
|
|
/* Hash whole blocks */
|
|
while (len >= remaining) {
|
|
memcpy(ctx->wbuffer + bufpos, buffer, remaining);
|
|
buffer = (const char *)buffer + remaining;
|
|
len -= remaining;
|
|
remaining = 128;
|
|
bufpos = 0;
|
|
sha512_process_block128(ctx);
|
|
}
|
|
|
|
/* Save last, partial blosk */
|
|
memcpy(ctx->wbuffer + bufpos, buffer, len);
|
|
#else
|
|
while (1) {
|
|
remaining = 128 - bufpos;
|
|
if (remaining > len)
|
|
remaining = len;
|
|
/* Copy data into aligned buffer */
|
|
memcpy(ctx->wbuffer + bufpos, buffer, remaining);
|
|
len -= remaining;
|
|
buffer = (const char *)buffer + remaining;
|
|
bufpos += remaining;
|
|
/* clever way to do "if (bufpos != 128) break; ... ; bufpos = 0;" */
|
|
bufpos -= 128;
|
|
if (bufpos != 0)
|
|
break;
|
|
/* Buffer is filled up, process it */
|
|
sha512_process_block128(ctx);
|
|
/*bufpos = 0; - already is */
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* Used also for sha256 */
|
|
void FAST_FUNC sha1_end(sha1_ctx_t *ctx, void *resbuf)
|
|
{
|
|
unsigned hash_size;
|
|
|
|
/* SHA stores total in BE, need to swap on LE arches: */
|
|
common64_end(ctx, /*swap_needed:*/ BB_LITTLE_ENDIAN);
|
|
|
|
hash_size = (ctx->process_block == sha1_process_block64) ? 5 : 8;
|
|
/* This way we do not impose alignment constraints on resbuf: */
|
|
if (BB_LITTLE_ENDIAN) {
|
|
unsigned i;
|
|
for (i = 0; i < hash_size; ++i)
|
|
ctx->hash[i] = SWAP_BE32(ctx->hash[i]);
|
|
}
|
|
memcpy(resbuf, ctx->hash, sizeof(ctx->hash[0]) * hash_size);
|
|
}
|
|
|
|
void FAST_FUNC sha512_end(sha512_ctx_t *ctx, void *resbuf)
|
|
{
|
|
unsigned bufpos = ctx->total64[0] & 127;
|
|
|
|
/* Pad the buffer to the next 128-byte boundary with 0x80,0,0,0... */
|
|
ctx->wbuffer[bufpos++] = 0x80;
|
|
|
|
while (1) {
|
|
unsigned remaining = 128 - bufpos;
|
|
memset(ctx->wbuffer + bufpos, 0, remaining);
|
|
if (remaining >= 16) {
|
|
/* Store the 128-bit counter of bits in the buffer in BE format */
|
|
uint64_t t;
|
|
t = ctx->total64[0] << 3;
|
|
t = SWAP_BE64(t);
|
|
*(uint64_t *) (&ctx->wbuffer[128 - 8]) = t;
|
|
t = (ctx->total64[1] << 3) | (ctx->total64[0] >> 61);
|
|
t = SWAP_BE64(t);
|
|
*(uint64_t *) (&ctx->wbuffer[128 - 16]) = t;
|
|
}
|
|
sha512_process_block128(ctx);
|
|
if (remaining >= 16)
|
|
break;
|
|
bufpos = 0;
|
|
}
|
|
|
|
if (BB_LITTLE_ENDIAN) {
|
|
unsigned i;
|
|
for (i = 0; i < ARRAY_SIZE(ctx->hash); ++i)
|
|
ctx->hash[i] = SWAP_BE64(ctx->hash[i]);
|
|
}
|
|
memcpy(resbuf, ctx->hash, sizeof(ctx->hash));
|
|
}
|