[2725] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Utility routines.
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| 4 | *
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| 5 | * Copyright (C) 2010 Denys Vlasenko
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| 6 | *
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| 7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 8 | */
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| 9 |
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| 10 | #include "libbb.h"
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| 11 |
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| 12 | /* gcc 4.2.1 optimizes rotr64 better with inline than with macro
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| 13 | * (for rotX32, there is no difference). Why? My guess is that
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| 14 | * macro requires clever common subexpression elimination heuristics
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| 15 | * in gcc, while inline basically forces it to happen.
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| 16 | */
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| 17 | //#define rotl32(x,n) (((x) << (n)) | ((x) >> (32 - (n))))
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| 18 | static ALWAYS_INLINE uint32_t rotl32(uint32_t x, unsigned n)
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| 19 | {
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| 20 | return (x << n) | (x >> (32 - n));
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| 21 | }
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| 22 | //#define rotr32(x,n) (((x) >> (n)) | ((x) << (32 - (n))))
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| 23 | static ALWAYS_INLINE uint32_t rotr32(uint32_t x, unsigned n)
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| 24 | {
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| 25 | return (x >> n) | (x << (32 - n));
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| 26 | }
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| 27 | /* rotr64 in needed for sha512 only: */
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| 28 | //#define rotr64(x,n) (((x) >> (n)) | ((x) << (64 - (n))))
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| 29 | static ALWAYS_INLINE uint64_t rotr64(uint64_t x, unsigned n)
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| 30 | {
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| 31 | return (x >> n) | (x << (64 - n));
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| 32 | }
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| 33 |
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[3232] | 34 | /* rotl64 only used for sha3 currently */
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| 35 | static ALWAYS_INLINE uint64_t rotl64(uint64_t x, unsigned n)
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| 36 | {
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| 37 | return (x << n) | (x >> (64 - n));
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| 38 | }
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[2725] | 39 |
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| 40 | /* Feed data through a temporary buffer.
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| 41 | * The internal buffer remembers previous data until it has 64
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| 42 | * bytes worth to pass on.
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| 43 | */
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| 44 | static void FAST_FUNC common64_hash(md5_ctx_t *ctx, const void *buffer, size_t len)
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| 45 | {
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| 46 | unsigned bufpos = ctx->total64 & 63;
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| 47 |
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| 48 | ctx->total64 += len;
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| 49 |
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| 50 | while (1) {
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| 51 | unsigned remaining = 64 - bufpos;
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| 52 | if (remaining > len)
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| 53 | remaining = len;
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| 54 | /* Copy data into aligned buffer */
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| 55 | memcpy(ctx->wbuffer + bufpos, buffer, remaining);
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| 56 | len -= remaining;
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| 57 | buffer = (const char *)buffer + remaining;
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| 58 | bufpos += remaining;
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[3232] | 59 | /* Clever way to do "if (bufpos != N) break; ... ; bufpos = 0;" */
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[2725] | 60 | bufpos -= 64;
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| 61 | if (bufpos != 0)
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| 62 | break;
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| 63 | /* Buffer is filled up, process it */
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| 64 | ctx->process_block(ctx);
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| 65 | /*bufpos = 0; - already is */
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| 66 | }
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| 67 | }
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| 68 |
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| 69 | /* Process the remaining bytes in the buffer */
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| 70 | static void FAST_FUNC common64_end(md5_ctx_t *ctx, int swap_needed)
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| 71 | {
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| 72 | unsigned bufpos = ctx->total64 & 63;
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| 73 | /* Pad the buffer to the next 64-byte boundary with 0x80,0,0,0... */
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| 74 | ctx->wbuffer[bufpos++] = 0x80;
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| 75 |
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| 76 | /* This loop iterates either once or twice, no more, no less */
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| 77 | while (1) {
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| 78 | unsigned remaining = 64 - bufpos;
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| 79 | memset(ctx->wbuffer + bufpos, 0, remaining);
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| 80 | /* Do we have enough space for the length count? */
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| 81 | if (remaining >= 8) {
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| 82 | /* Store the 64-bit counter of bits in the buffer */
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| 83 | uint64_t t = ctx->total64 << 3;
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| 84 | if (swap_needed)
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| 85 | t = bb_bswap_64(t);
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| 86 | /* wbuffer is suitably aligned for this */
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| 87 | *(uint64_t *) (&ctx->wbuffer[64 - 8]) = t;
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| 88 | }
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| 89 | ctx->process_block(ctx);
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| 90 | if (remaining >= 8)
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| 91 | break;
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| 92 | bufpos = 0;
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| 93 | }
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| 94 | }
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| 95 |
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| 96 |
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| 97 | /*
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| 98 | * Compute MD5 checksum of strings according to the
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| 99 | * definition of MD5 in RFC 1321 from April 1992.
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| 100 | *
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| 101 | * Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
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| 102 | *
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| 103 | * Copyright (C) 1995-1999 Free Software Foundation, Inc.
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| 104 | * Copyright (C) 2001 Manuel Novoa III
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| 105 | * Copyright (C) 2003 Glenn L. McGrath
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| 106 | * Copyright (C) 2003 Erik Andersen
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| 107 | *
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| 108 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 109 | */
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| 110 |
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| 111 | /* 0: fastest, 3: smallest */
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[3232] | 112 | #if CONFIG_MD5_SMALL < 0
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| 113 | # define MD5_SMALL 0
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| 114 | #elif CONFIG_MD5_SMALL > 3
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| 115 | # define MD5_SMALL 3
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[2725] | 116 | #else
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[3232] | 117 | # define MD5_SMALL CONFIG_MD5_SMALL
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[2725] | 118 | #endif
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| 119 |
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| 120 | /* These are the four functions used in the four steps of the MD5 algorithm
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| 121 | * and defined in the RFC 1321. The first function is a little bit optimized
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| 122 | * (as found in Colin Plumbs public domain implementation).
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| 123 | * #define FF(b, c, d) ((b & c) | (~b & d))
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| 124 | */
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| 125 | #undef FF
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| 126 | #undef FG
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| 127 | #undef FH
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| 128 | #undef FI
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| 129 | #define FF(b, c, d) (d ^ (b & (c ^ d)))
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| 130 | #define FG(b, c, d) FF(d, b, c)
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| 131 | #define FH(b, c, d) (b ^ c ^ d)
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| 132 | #define FI(b, c, d) (c ^ (b | ~d))
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| 133 |
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| 134 | /* Hash a single block, 64 bytes long and 4-byte aligned */
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| 135 | static void FAST_FUNC md5_process_block64(md5_ctx_t *ctx)
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| 136 | {
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[3232] | 137 | #if MD5_SMALL > 0
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[2725] | 138 | /* Before we start, one word to the strange constants.
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| 139 | They are defined in RFC 1321 as
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| 140 | T[i] = (int)(4294967296.0 * fabs(sin(i))), i=1..64
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| 141 | */
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| 142 | static const uint32_t C_array[] = {
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| 143 | /* round 1 */
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| 144 | 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
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| 145 | 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
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| 146 | 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
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| 147 | 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
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| 148 | /* round 2 */
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| 149 | 0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
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| 150 | 0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
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| 151 | 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
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| 152 | 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
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| 153 | /* round 3 */
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| 154 | 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
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| 155 | 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
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| 156 | 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x4881d05,
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| 157 | 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
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| 158 | /* round 4 */
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| 159 | 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
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| 160 | 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
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| 161 | 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
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| 162 | 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391
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| 163 | };
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| 164 | static const char P_array[] ALIGN1 = {
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[3232] | 165 | # if MD5_SMALL > 1
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[2725] | 166 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, /* 1 */
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| 167 | # endif
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| 168 | 1, 6, 11, 0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, /* 2 */
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| 169 | 5, 8, 11, 14, 1, 4, 7, 10, 13, 0, 3, 6, 9, 12, 15, 2, /* 3 */
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| 170 | 0, 7, 14, 5, 12, 3, 10, 1, 8, 15, 6, 13, 4, 11, 2, 9 /* 4 */
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| 171 | };
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| 172 | #endif
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| 173 | uint32_t *words = (void*) ctx->wbuffer;
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| 174 | uint32_t A = ctx->hash[0];
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| 175 | uint32_t B = ctx->hash[1];
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| 176 | uint32_t C = ctx->hash[2];
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| 177 | uint32_t D = ctx->hash[3];
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| 178 |
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[3232] | 179 | #if MD5_SMALL >= 2 /* 2 or 3 */
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[2725] | 180 |
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| 181 | static const char S_array[] ALIGN1 = {
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| 182 | 7, 12, 17, 22,
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| 183 | 5, 9, 14, 20,
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| 184 | 4, 11, 16, 23,
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| 185 | 6, 10, 15, 21
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| 186 | };
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| 187 | const uint32_t *pc;
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| 188 | const char *pp;
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| 189 | const char *ps;
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| 190 | int i;
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| 191 | uint32_t temp;
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| 192 |
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[3232] | 193 | if (BB_BIG_ENDIAN)
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| 194 | for (i = 0; i < 16; i++)
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| 195 | words[i] = SWAP_LE32(words[i]);
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[2725] | 196 |
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[3232] | 197 | # if MD5_SMALL == 3
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[2725] | 198 | pc = C_array;
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| 199 | pp = P_array;
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| 200 | ps = S_array - 4;
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| 201 |
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| 202 | for (i = 0; i < 64; i++) {
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| 203 | if ((i & 0x0f) == 0)
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| 204 | ps += 4;
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| 205 | temp = A;
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| 206 | switch (i >> 4) {
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| 207 | case 0:
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| 208 | temp += FF(B, C, D);
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| 209 | break;
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| 210 | case 1:
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| 211 | temp += FG(B, C, D);
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| 212 | break;
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| 213 | case 2:
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| 214 | temp += FH(B, C, D);
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| 215 | break;
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| 216 | case 3:
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| 217 | temp += FI(B, C, D);
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| 218 | }
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| 219 | temp += words[(int) (*pp++)] + *pc++;
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| 220 | temp = rotl32(temp, ps[i & 3]);
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| 221 | temp += B;
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| 222 | A = D;
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| 223 | D = C;
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| 224 | C = B;
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| 225 | B = temp;
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| 226 | }
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[3232] | 227 | # else /* MD5_SMALL == 2 */
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[2725] | 228 | pc = C_array;
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| 229 | pp = P_array;
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| 230 | ps = S_array;
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| 231 |
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| 232 | for (i = 0; i < 16; i++) {
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| 233 | temp = A + FF(B, C, D) + words[(int) (*pp++)] + *pc++;
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| 234 | temp = rotl32(temp, ps[i & 3]);
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| 235 | temp += B;
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| 236 | A = D;
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| 237 | D = C;
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| 238 | C = B;
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| 239 | B = temp;
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| 240 | }
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| 241 | ps += 4;
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| 242 | for (i = 0; i < 16; i++) {
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| 243 | temp = A + FG(B, C, D) + words[(int) (*pp++)] + *pc++;
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| 244 | temp = rotl32(temp, ps[i & 3]);
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| 245 | temp += B;
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| 246 | A = D;
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| 247 | D = C;
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| 248 | C = B;
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| 249 | B = temp;
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| 250 | }
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| 251 | ps += 4;
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| 252 | for (i = 0; i < 16; i++) {
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| 253 | temp = A + FH(B, C, D) + words[(int) (*pp++)] + *pc++;
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| 254 | temp = rotl32(temp, ps[i & 3]);
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| 255 | temp += B;
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| 256 | A = D;
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| 257 | D = C;
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| 258 | C = B;
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| 259 | B = temp;
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| 260 | }
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| 261 | ps += 4;
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| 262 | for (i = 0; i < 16; i++) {
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| 263 | temp = A + FI(B, C, D) + words[(int) (*pp++)] + *pc++;
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| 264 | temp = rotl32(temp, ps[i & 3]);
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| 265 | temp += B;
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| 266 | A = D;
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| 267 | D = C;
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| 268 | C = B;
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| 269 | B = temp;
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| 270 | }
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| 271 | # endif
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| 272 | /* Add checksum to the starting values */
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| 273 | ctx->hash[0] += A;
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| 274 | ctx->hash[1] += B;
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| 275 | ctx->hash[2] += C;
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| 276 | ctx->hash[3] += D;
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| 277 |
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[3232] | 278 | #else /* MD5_SMALL == 0 or 1 */
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[2725] | 279 |
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| 280 | uint32_t A_save = A;
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| 281 | uint32_t B_save = B;
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| 282 | uint32_t C_save = C;
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| 283 | uint32_t D_save = D;
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[3232] | 284 | # if MD5_SMALL == 1
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[2725] | 285 | const uint32_t *pc;
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| 286 | const char *pp;
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| 287 | int i;
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| 288 | # endif
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| 289 |
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| 290 | /* First round: using the given function, the context and a constant
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| 291 | the next context is computed. Because the algorithm's processing
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| 292 | unit is a 32-bit word and it is determined to work on words in
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| 293 | little endian byte order we perhaps have to change the byte order
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| 294 | before the computation. To reduce the work for the next steps
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| 295 | we save swapped words in WORDS array. */
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| 296 | # undef OP
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| 297 | # define OP(a, b, c, d, s, T) \
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| 298 | do { \
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| 299 | a += FF(b, c, d) + (*words IF_BIG_ENDIAN(= SWAP_LE32(*words))) + T; \
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| 300 | words++; \
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| 301 | a = rotl32(a, s); \
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| 302 | a += b; \
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| 303 | } while (0)
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| 304 |
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| 305 | /* Round 1 */
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[3232] | 306 | # if MD5_SMALL == 1
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[2725] | 307 | pc = C_array;
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| 308 | for (i = 0; i < 4; i++) {
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| 309 | OP(A, B, C, D, 7, *pc++);
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| 310 | OP(D, A, B, C, 12, *pc++);
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| 311 | OP(C, D, A, B, 17, *pc++);
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| 312 | OP(B, C, D, A, 22, *pc++);
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| 313 | }
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| 314 | # else
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| 315 | OP(A, B, C, D, 7, 0xd76aa478);
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| 316 | OP(D, A, B, C, 12, 0xe8c7b756);
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| 317 | OP(C, D, A, B, 17, 0x242070db);
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| 318 | OP(B, C, D, A, 22, 0xc1bdceee);
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| 319 | OP(A, B, C, D, 7, 0xf57c0faf);
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| 320 | OP(D, A, B, C, 12, 0x4787c62a);
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| 321 | OP(C, D, A, B, 17, 0xa8304613);
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| 322 | OP(B, C, D, A, 22, 0xfd469501);
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| 323 | OP(A, B, C, D, 7, 0x698098d8);
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| 324 | OP(D, A, B, C, 12, 0x8b44f7af);
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| 325 | OP(C, D, A, B, 17, 0xffff5bb1);
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| 326 | OP(B, C, D, A, 22, 0x895cd7be);
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| 327 | OP(A, B, C, D, 7, 0x6b901122);
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| 328 | OP(D, A, B, C, 12, 0xfd987193);
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| 329 | OP(C, D, A, B, 17, 0xa679438e);
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| 330 | OP(B, C, D, A, 22, 0x49b40821);
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| 331 | # endif
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| 332 | words -= 16;
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| 333 |
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| 334 | /* For the second to fourth round we have the possibly swapped words
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| 335 | in WORDS. Redefine the macro to take an additional first
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| 336 | argument specifying the function to use. */
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| 337 | # undef OP
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| 338 | # define OP(f, a, b, c, d, k, s, T) \
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| 339 | do { \
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| 340 | a += f(b, c, d) + words[k] + T; \
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| 341 | a = rotl32(a, s); \
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| 342 | a += b; \
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| 343 | } while (0)
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| 344 |
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| 345 | /* Round 2 */
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[3232] | 346 | # if MD5_SMALL == 1
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[2725] | 347 | pp = P_array;
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| 348 | for (i = 0; i < 4; i++) {
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| 349 | OP(FG, A, B, C, D, (int) (*pp++), 5, *pc++);
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| 350 | OP(FG, D, A, B, C, (int) (*pp++), 9, *pc++);
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| 351 | OP(FG, C, D, A, B, (int) (*pp++), 14, *pc++);
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| 352 | OP(FG, B, C, D, A, (int) (*pp++), 20, *pc++);
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| 353 | }
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| 354 | # else
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| 355 | OP(FG, A, B, C, D, 1, 5, 0xf61e2562);
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| 356 | OP(FG, D, A, B, C, 6, 9, 0xc040b340);
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| 357 | OP(FG, C, D, A, B, 11, 14, 0x265e5a51);
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| 358 | OP(FG, B, C, D, A, 0, 20, 0xe9b6c7aa);
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| 359 | OP(FG, A, B, C, D, 5, 5, 0xd62f105d);
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| 360 | OP(FG, D, A, B, C, 10, 9, 0x02441453);
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| 361 | OP(FG, C, D, A, B, 15, 14, 0xd8a1e681);
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| 362 | OP(FG, B, C, D, A, 4, 20, 0xe7d3fbc8);
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| 363 | OP(FG, A, B, C, D, 9, 5, 0x21e1cde6);
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| 364 | OP(FG, D, A, B, C, 14, 9, 0xc33707d6);
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| 365 | OP(FG, C, D, A, B, 3, 14, 0xf4d50d87);
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| 366 | OP(FG, B, C, D, A, 8, 20, 0x455a14ed);
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| 367 | OP(FG, A, B, C, D, 13, 5, 0xa9e3e905);
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| 368 | OP(FG, D, A, B, C, 2, 9, 0xfcefa3f8);
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| 369 | OP(FG, C, D, A, B, 7, 14, 0x676f02d9);
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| 370 | OP(FG, B, C, D, A, 12, 20, 0x8d2a4c8a);
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| 371 | # endif
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| 372 |
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| 373 | /* Round 3 */
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[3232] | 374 | # if MD5_SMALL == 1
|
---|
[2725] | 375 | for (i = 0; i < 4; i++) {
|
---|
| 376 | OP(FH, A, B, C, D, (int) (*pp++), 4, *pc++);
|
---|
| 377 | OP(FH, D, A, B, C, (int) (*pp++), 11, *pc++);
|
---|
| 378 | OP(FH, C, D, A, B, (int) (*pp++), 16, *pc++);
|
---|
| 379 | OP(FH, B, C, D, A, (int) (*pp++), 23, *pc++);
|
---|
| 380 | }
|
---|
| 381 | # else
|
---|
| 382 | OP(FH, A, B, C, D, 5, 4, 0xfffa3942);
|
---|
| 383 | OP(FH, D, A, B, C, 8, 11, 0x8771f681);
|
---|
| 384 | OP(FH, C, D, A, B, 11, 16, 0x6d9d6122);
|
---|
| 385 | OP(FH, B, C, D, A, 14, 23, 0xfde5380c);
|
---|
| 386 | OP(FH, A, B, C, D, 1, 4, 0xa4beea44);
|
---|
| 387 | OP(FH, D, A, B, C, 4, 11, 0x4bdecfa9);
|
---|
| 388 | OP(FH, C, D, A, B, 7, 16, 0xf6bb4b60);
|
---|
| 389 | OP(FH, B, C, D, A, 10, 23, 0xbebfbc70);
|
---|
| 390 | OP(FH, A, B, C, D, 13, 4, 0x289b7ec6);
|
---|
| 391 | OP(FH, D, A, B, C, 0, 11, 0xeaa127fa);
|
---|
| 392 | OP(FH, C, D, A, B, 3, 16, 0xd4ef3085);
|
---|
| 393 | OP(FH, B, C, D, A, 6, 23, 0x04881d05);
|
---|
| 394 | OP(FH, A, B, C, D, 9, 4, 0xd9d4d039);
|
---|
| 395 | OP(FH, D, A, B, C, 12, 11, 0xe6db99e5);
|
---|
| 396 | OP(FH, C, D, A, B, 15, 16, 0x1fa27cf8);
|
---|
| 397 | OP(FH, B, C, D, A, 2, 23, 0xc4ac5665);
|
---|
| 398 | # endif
|
---|
| 399 |
|
---|
| 400 | /* Round 4 */
|
---|
[3232] | 401 | # if MD5_SMALL == 1
|
---|
[2725] | 402 | for (i = 0; i < 4; i++) {
|
---|
| 403 | OP(FI, A, B, C, D, (int) (*pp++), 6, *pc++);
|
---|
| 404 | OP(FI, D, A, B, C, (int) (*pp++), 10, *pc++);
|
---|
| 405 | OP(FI, C, D, A, B, (int) (*pp++), 15, *pc++);
|
---|
| 406 | OP(FI, B, C, D, A, (int) (*pp++), 21, *pc++);
|
---|
| 407 | }
|
---|
| 408 | # else
|
---|
| 409 | OP(FI, A, B, C, D, 0, 6, 0xf4292244);
|
---|
| 410 | OP(FI, D, A, B, C, 7, 10, 0x432aff97);
|
---|
| 411 | OP(FI, C, D, A, B, 14, 15, 0xab9423a7);
|
---|
| 412 | OP(FI, B, C, D, A, 5, 21, 0xfc93a039);
|
---|
| 413 | OP(FI, A, B, C, D, 12, 6, 0x655b59c3);
|
---|
| 414 | OP(FI, D, A, B, C, 3, 10, 0x8f0ccc92);
|
---|
| 415 | OP(FI, C, D, A, B, 10, 15, 0xffeff47d);
|
---|
| 416 | OP(FI, B, C, D, A, 1, 21, 0x85845dd1);
|
---|
| 417 | OP(FI, A, B, C, D, 8, 6, 0x6fa87e4f);
|
---|
| 418 | OP(FI, D, A, B, C, 15, 10, 0xfe2ce6e0);
|
---|
| 419 | OP(FI, C, D, A, B, 6, 15, 0xa3014314);
|
---|
| 420 | OP(FI, B, C, D, A, 13, 21, 0x4e0811a1);
|
---|
| 421 | OP(FI, A, B, C, D, 4, 6, 0xf7537e82);
|
---|
| 422 | OP(FI, D, A, B, C, 11, 10, 0xbd3af235);
|
---|
| 423 | OP(FI, C, D, A, B, 2, 15, 0x2ad7d2bb);
|
---|
| 424 | OP(FI, B, C, D, A, 9, 21, 0xeb86d391);
|
---|
| 425 | # undef OP
|
---|
| 426 | # endif
|
---|
| 427 | /* Add checksum to the starting values */
|
---|
| 428 | ctx->hash[0] = A_save + A;
|
---|
| 429 | ctx->hash[1] = B_save + B;
|
---|
| 430 | ctx->hash[2] = C_save + C;
|
---|
| 431 | ctx->hash[3] = D_save + D;
|
---|
| 432 | #endif
|
---|
| 433 | }
|
---|
| 434 | #undef FF
|
---|
| 435 | #undef FG
|
---|
| 436 | #undef FH
|
---|
| 437 | #undef FI
|
---|
| 438 |
|
---|
| 439 | /* Initialize structure containing state of computation.
|
---|
| 440 | * (RFC 1321, 3.3: Step 3)
|
---|
| 441 | */
|
---|
| 442 | void FAST_FUNC md5_begin(md5_ctx_t *ctx)
|
---|
| 443 | {
|
---|
| 444 | ctx->hash[0] = 0x67452301;
|
---|
| 445 | ctx->hash[1] = 0xefcdab89;
|
---|
| 446 | ctx->hash[2] = 0x98badcfe;
|
---|
| 447 | ctx->hash[3] = 0x10325476;
|
---|
| 448 | ctx->total64 = 0;
|
---|
| 449 | ctx->process_block = md5_process_block64;
|
---|
| 450 | }
|
---|
| 451 |
|
---|
| 452 | /* Used also for sha1 and sha256 */
|
---|
| 453 | void FAST_FUNC md5_hash(md5_ctx_t *ctx, const void *buffer, size_t len)
|
---|
| 454 | {
|
---|
| 455 | common64_hash(ctx, buffer, len);
|
---|
| 456 | }
|
---|
| 457 |
|
---|
| 458 | /* Process the remaining bytes in the buffer and put result from CTX
|
---|
| 459 | * in first 16 bytes following RESBUF. The result is always in little
|
---|
| 460 | * endian byte order, so that a byte-wise output yields to the wanted
|
---|
| 461 | * ASCII representation of the message digest.
|
---|
| 462 | */
|
---|
| 463 | void FAST_FUNC md5_end(md5_ctx_t *ctx, void *resbuf)
|
---|
| 464 | {
|
---|
| 465 | /* MD5 stores total in LE, need to swap on BE arches: */
|
---|
| 466 | common64_end(ctx, /*swap_needed:*/ BB_BIG_ENDIAN);
|
---|
| 467 |
|
---|
| 468 | /* The MD5 result is in little endian byte order */
|
---|
[3232] | 469 | if (BB_BIG_ENDIAN) {
|
---|
| 470 | ctx->hash[0] = SWAP_LE32(ctx->hash[0]);
|
---|
| 471 | ctx->hash[1] = SWAP_LE32(ctx->hash[1]);
|
---|
| 472 | ctx->hash[2] = SWAP_LE32(ctx->hash[2]);
|
---|
| 473 | ctx->hash[3] = SWAP_LE32(ctx->hash[3]);
|
---|
| 474 | }
|
---|
| 475 |
|
---|
[2725] | 476 | memcpy(resbuf, ctx->hash, sizeof(ctx->hash[0]) * 4);
|
---|
| 477 | }
|
---|
| 478 |
|
---|
| 479 |
|
---|
| 480 | /*
|
---|
| 481 | * SHA1 part is:
|
---|
| 482 | * Copyright 2007 Rob Landley <rob@landley.net>
|
---|
| 483 | *
|
---|
| 484 | * Based on the public domain SHA-1 in C by Steve Reid <steve@edmweb.com>
|
---|
| 485 | * from http://www.mirrors.wiretapped.net/security/cryptography/hashes/sha1/
|
---|
| 486 | *
|
---|
| 487 | * Licensed under GPLv2, see file LICENSE in this source tree.
|
---|
| 488 | *
|
---|
| 489 | * ---------------------------------------------------------------------------
|
---|
| 490 | *
|
---|
| 491 | * SHA256 and SHA512 parts are:
|
---|
| 492 | * Released into the Public Domain by Ulrich Drepper <drepper@redhat.com>.
|
---|
| 493 | * Shrank by Denys Vlasenko.
|
---|
| 494 | *
|
---|
| 495 | * ---------------------------------------------------------------------------
|
---|
| 496 | *
|
---|
| 497 | * The best way to test random blocksizes is to go to coreutils/md5_sha1_sum.c
|
---|
| 498 | * and replace "4096" with something like "2000 + time(NULL) % 2097",
|
---|
| 499 | * then rebuild and compare "shaNNNsum bigfile" results.
|
---|
| 500 | */
|
---|
| 501 |
|
---|
| 502 | static void FAST_FUNC sha1_process_block64(sha1_ctx_t *ctx)
|
---|
| 503 | {
|
---|
| 504 | static const uint32_t rconsts[] = {
|
---|
| 505 | 0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xCA62C1D6
|
---|
| 506 | };
|
---|
| 507 | int i, j;
|
---|
| 508 | int cnt;
|
---|
| 509 | uint32_t W[16+16];
|
---|
| 510 | uint32_t a, b, c, d, e;
|
---|
| 511 |
|
---|
| 512 | /* On-stack work buffer frees up one register in the main loop
|
---|
| 513 | * which otherwise will be needed to hold ctx pointer */
|
---|
| 514 | for (i = 0; i < 16; i++)
|
---|
| 515 | W[i] = W[i+16] = SWAP_BE32(((uint32_t*)ctx->wbuffer)[i]);
|
---|
| 516 |
|
---|
| 517 | a = ctx->hash[0];
|
---|
| 518 | b = ctx->hash[1];
|
---|
| 519 | c = ctx->hash[2];
|
---|
| 520 | d = ctx->hash[3];
|
---|
| 521 | e = ctx->hash[4];
|
---|
| 522 |
|
---|
| 523 | /* 4 rounds of 20 operations each */
|
---|
| 524 | cnt = 0;
|
---|
| 525 | for (i = 0; i < 4; i++) {
|
---|
| 526 | j = 19;
|
---|
| 527 | do {
|
---|
| 528 | uint32_t work;
|
---|
| 529 |
|
---|
| 530 | work = c ^ d;
|
---|
| 531 | if (i == 0) {
|
---|
| 532 | work = (work & b) ^ d;
|
---|
| 533 | if (j <= 3)
|
---|
| 534 | goto ge16;
|
---|
| 535 | /* Used to do SWAP_BE32 here, but this
|
---|
| 536 | * requires ctx (see comment above) */
|
---|
| 537 | work += W[cnt];
|
---|
| 538 | } else {
|
---|
| 539 | if (i == 2)
|
---|
| 540 | work = ((b | c) & d) | (b & c);
|
---|
| 541 | else /* i = 1 or 3 */
|
---|
| 542 | work ^= b;
|
---|
| 543 | ge16:
|
---|
| 544 | W[cnt] = W[cnt+16] = rotl32(W[cnt+13] ^ W[cnt+8] ^ W[cnt+2] ^ W[cnt], 1);
|
---|
| 545 | work += W[cnt];
|
---|
| 546 | }
|
---|
| 547 | work += e + rotl32(a, 5) + rconsts[i];
|
---|
| 548 |
|
---|
| 549 | /* Rotate by one for next time */
|
---|
| 550 | e = d;
|
---|
| 551 | d = c;
|
---|
| 552 | c = /* b = */ rotl32(b, 30);
|
---|
| 553 | b = a;
|
---|
| 554 | a = work;
|
---|
| 555 | cnt = (cnt + 1) & 15;
|
---|
| 556 | } while (--j >= 0);
|
---|
| 557 | }
|
---|
| 558 |
|
---|
| 559 | ctx->hash[0] += a;
|
---|
| 560 | ctx->hash[1] += b;
|
---|
| 561 | ctx->hash[2] += c;
|
---|
| 562 | ctx->hash[3] += d;
|
---|
| 563 | ctx->hash[4] += e;
|
---|
| 564 | }
|
---|
| 565 |
|
---|
| 566 | /* Constants for SHA512 from FIPS 180-2:4.2.3.
|
---|
| 567 | * SHA256 constants from FIPS 180-2:4.2.2
|
---|
| 568 | * are the most significant half of first 64 elements
|
---|
| 569 | * of the same array.
|
---|
| 570 | */
|
---|
| 571 | static const uint64_t sha_K[80] = {
|
---|
| 572 | 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
|
---|
| 573 | 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
|
---|
| 574 | 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
|
---|
| 575 | 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
|
---|
| 576 | 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
|
---|
| 577 | 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
|
---|
| 578 | 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
|
---|
| 579 | 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
|
---|
| 580 | 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
|
---|
| 581 | 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
|
---|
| 582 | 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
|
---|
| 583 | 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
|
---|
| 584 | 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
|
---|
| 585 | 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
|
---|
| 586 | 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
|
---|
| 587 | 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
|
---|
| 588 | 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
|
---|
| 589 | 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
|
---|
| 590 | 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
|
---|
| 591 | 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
|
---|
| 592 | 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
|
---|
| 593 | 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
|
---|
| 594 | 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
|
---|
| 595 | 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
|
---|
| 596 | 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
|
---|
| 597 | 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
|
---|
| 598 | 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
|
---|
| 599 | 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
|
---|
| 600 | 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
|
---|
| 601 | 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
|
---|
| 602 | 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
|
---|
| 603 | 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
|
---|
| 604 | 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, /* [64]+ are used for sha512 only */
|
---|
| 605 | 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
|
---|
| 606 | 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
|
---|
| 607 | 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
|
---|
| 608 | 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
|
---|
| 609 | 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
|
---|
| 610 | 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
|
---|
| 611 | 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
|
---|
| 612 | };
|
---|
| 613 |
|
---|
| 614 | #undef Ch
|
---|
| 615 | #undef Maj
|
---|
| 616 | #undef S0
|
---|
| 617 | #undef S1
|
---|
| 618 | #undef R0
|
---|
| 619 | #undef R1
|
---|
| 620 |
|
---|
| 621 | static void FAST_FUNC sha256_process_block64(sha256_ctx_t *ctx)
|
---|
| 622 | {
|
---|
| 623 | unsigned t;
|
---|
| 624 | uint32_t W[64], a, b, c, d, e, f, g, h;
|
---|
| 625 | const uint32_t *words = (uint32_t*) ctx->wbuffer;
|
---|
| 626 |
|
---|
| 627 | /* Operators defined in FIPS 180-2:4.1.2. */
|
---|
| 628 | #define Ch(x, y, z) ((x & y) ^ (~x & z))
|
---|
| 629 | #define Maj(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
|
---|
| 630 | #define S0(x) (rotr32(x, 2) ^ rotr32(x, 13) ^ rotr32(x, 22))
|
---|
| 631 | #define S1(x) (rotr32(x, 6) ^ rotr32(x, 11) ^ rotr32(x, 25))
|
---|
| 632 | #define R0(x) (rotr32(x, 7) ^ rotr32(x, 18) ^ (x >> 3))
|
---|
| 633 | #define R1(x) (rotr32(x, 17) ^ rotr32(x, 19) ^ (x >> 10))
|
---|
| 634 |
|
---|
| 635 | /* Compute the message schedule according to FIPS 180-2:6.2.2 step 2. */
|
---|
| 636 | for (t = 0; t < 16; ++t)
|
---|
| 637 | W[t] = SWAP_BE32(words[t]);
|
---|
| 638 | for (/*t = 16*/; t < 64; ++t)
|
---|
| 639 | W[t] = R1(W[t - 2]) + W[t - 7] + R0(W[t - 15]) + W[t - 16];
|
---|
| 640 |
|
---|
| 641 | a = ctx->hash[0];
|
---|
| 642 | b = ctx->hash[1];
|
---|
| 643 | c = ctx->hash[2];
|
---|
| 644 | d = ctx->hash[3];
|
---|
| 645 | e = ctx->hash[4];
|
---|
| 646 | f = ctx->hash[5];
|
---|
| 647 | g = ctx->hash[6];
|
---|
| 648 | h = ctx->hash[7];
|
---|
| 649 |
|
---|
| 650 | /* The actual computation according to FIPS 180-2:6.2.2 step 3. */
|
---|
| 651 | for (t = 0; t < 64; ++t) {
|
---|
| 652 | /* Need to fetch upper half of sha_K[t]
|
---|
| 653 | * (I hope compiler is clever enough to just fetch
|
---|
| 654 | * upper half)
|
---|
| 655 | */
|
---|
| 656 | uint32_t K_t = sha_K[t] >> 32;
|
---|
| 657 | uint32_t T1 = h + S1(e) + Ch(e, f, g) + K_t + W[t];
|
---|
| 658 | uint32_t T2 = S0(a) + Maj(a, b, c);
|
---|
| 659 | h = g;
|
---|
| 660 | g = f;
|
---|
| 661 | f = e;
|
---|
| 662 | e = d + T1;
|
---|
| 663 | d = c;
|
---|
| 664 | c = b;
|
---|
| 665 | b = a;
|
---|
| 666 | a = T1 + T2;
|
---|
| 667 | }
|
---|
| 668 | #undef Ch
|
---|
| 669 | #undef Maj
|
---|
| 670 | #undef S0
|
---|
| 671 | #undef S1
|
---|
| 672 | #undef R0
|
---|
| 673 | #undef R1
|
---|
| 674 | /* Add the starting values of the context according to FIPS 180-2:6.2.2
|
---|
| 675 | step 4. */
|
---|
| 676 | ctx->hash[0] += a;
|
---|
| 677 | ctx->hash[1] += b;
|
---|
| 678 | ctx->hash[2] += c;
|
---|
| 679 | ctx->hash[3] += d;
|
---|
| 680 | ctx->hash[4] += e;
|
---|
| 681 | ctx->hash[5] += f;
|
---|
| 682 | ctx->hash[6] += g;
|
---|
| 683 | ctx->hash[7] += h;
|
---|
| 684 | }
|
---|
| 685 |
|
---|
| 686 | static void FAST_FUNC sha512_process_block128(sha512_ctx_t *ctx)
|
---|
| 687 | {
|
---|
| 688 | unsigned t;
|
---|
| 689 | uint64_t W[80];
|
---|
| 690 | /* On i386, having assignments here (not later as sha256 does)
|
---|
| 691 | * produces 99 bytes smaller code with gcc 4.3.1
|
---|
| 692 | */
|
---|
| 693 | uint64_t a = ctx->hash[0];
|
---|
| 694 | uint64_t b = ctx->hash[1];
|
---|
| 695 | uint64_t c = ctx->hash[2];
|
---|
| 696 | uint64_t d = ctx->hash[3];
|
---|
| 697 | uint64_t e = ctx->hash[4];
|
---|
| 698 | uint64_t f = ctx->hash[5];
|
---|
| 699 | uint64_t g = ctx->hash[6];
|
---|
| 700 | uint64_t h = ctx->hash[7];
|
---|
| 701 | const uint64_t *words = (uint64_t*) ctx->wbuffer;
|
---|
| 702 |
|
---|
| 703 | /* Operators defined in FIPS 180-2:4.1.2. */
|
---|
| 704 | #define Ch(x, y, z) ((x & y) ^ (~x & z))
|
---|
| 705 | #define Maj(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
|
---|
| 706 | #define S0(x) (rotr64(x, 28) ^ rotr64(x, 34) ^ rotr64(x, 39))
|
---|
| 707 | #define S1(x) (rotr64(x, 14) ^ rotr64(x, 18) ^ rotr64(x, 41))
|
---|
| 708 | #define R0(x) (rotr64(x, 1) ^ rotr64(x, 8) ^ (x >> 7))
|
---|
| 709 | #define R1(x) (rotr64(x, 19) ^ rotr64(x, 61) ^ (x >> 6))
|
---|
| 710 |
|
---|
| 711 | /* Compute the message schedule according to FIPS 180-2:6.3.2 step 2. */
|
---|
| 712 | for (t = 0; t < 16; ++t)
|
---|
| 713 | W[t] = SWAP_BE64(words[t]);
|
---|
| 714 | for (/*t = 16*/; t < 80; ++t)
|
---|
| 715 | W[t] = R1(W[t - 2]) + W[t - 7] + R0(W[t - 15]) + W[t - 16];
|
---|
| 716 |
|
---|
| 717 | /* The actual computation according to FIPS 180-2:6.3.2 step 3. */
|
---|
| 718 | for (t = 0; t < 80; ++t) {
|
---|
| 719 | uint64_t T1 = h + S1(e) + Ch(e, f, g) + sha_K[t] + W[t];
|
---|
| 720 | uint64_t T2 = S0(a) + Maj(a, b, c);
|
---|
| 721 | h = g;
|
---|
| 722 | g = f;
|
---|
| 723 | f = e;
|
---|
| 724 | e = d + T1;
|
---|
| 725 | d = c;
|
---|
| 726 | c = b;
|
---|
| 727 | b = a;
|
---|
| 728 | a = T1 + T2;
|
---|
| 729 | }
|
---|
| 730 | #undef Ch
|
---|
| 731 | #undef Maj
|
---|
| 732 | #undef S0
|
---|
| 733 | #undef S1
|
---|
| 734 | #undef R0
|
---|
| 735 | #undef R1
|
---|
| 736 | /* Add the starting values of the context according to FIPS 180-2:6.3.2
|
---|
| 737 | step 4. */
|
---|
| 738 | ctx->hash[0] += a;
|
---|
| 739 | ctx->hash[1] += b;
|
---|
| 740 | ctx->hash[2] += c;
|
---|
| 741 | ctx->hash[3] += d;
|
---|
| 742 | ctx->hash[4] += e;
|
---|
| 743 | ctx->hash[5] += f;
|
---|
| 744 | ctx->hash[6] += g;
|
---|
| 745 | ctx->hash[7] += h;
|
---|
| 746 | }
|
---|
| 747 |
|
---|
| 748 |
|
---|
| 749 | void FAST_FUNC sha1_begin(sha1_ctx_t *ctx)
|
---|
| 750 | {
|
---|
| 751 | ctx->hash[0] = 0x67452301;
|
---|
| 752 | ctx->hash[1] = 0xefcdab89;
|
---|
| 753 | ctx->hash[2] = 0x98badcfe;
|
---|
| 754 | ctx->hash[3] = 0x10325476;
|
---|
| 755 | ctx->hash[4] = 0xc3d2e1f0;
|
---|
| 756 | ctx->total64 = 0;
|
---|
| 757 | ctx->process_block = sha1_process_block64;
|
---|
| 758 | }
|
---|
| 759 |
|
---|
| 760 | static const uint32_t init256[] = {
|
---|
| 761 | 0,
|
---|
| 762 | 0,
|
---|
| 763 | 0x6a09e667,
|
---|
| 764 | 0xbb67ae85,
|
---|
| 765 | 0x3c6ef372,
|
---|
| 766 | 0xa54ff53a,
|
---|
| 767 | 0x510e527f,
|
---|
| 768 | 0x9b05688c,
|
---|
| 769 | 0x1f83d9ab,
|
---|
| 770 | 0x5be0cd19,
|
---|
| 771 | };
|
---|
| 772 | static const uint32_t init512_lo[] = {
|
---|
| 773 | 0,
|
---|
| 774 | 0,
|
---|
| 775 | 0xf3bcc908,
|
---|
| 776 | 0x84caa73b,
|
---|
| 777 | 0xfe94f82b,
|
---|
| 778 | 0x5f1d36f1,
|
---|
| 779 | 0xade682d1,
|
---|
| 780 | 0x2b3e6c1f,
|
---|
| 781 | 0xfb41bd6b,
|
---|
| 782 | 0x137e2179,
|
---|
| 783 | };
|
---|
| 784 |
|
---|
| 785 | /* Initialize structure containing state of computation.
|
---|
| 786 | (FIPS 180-2:5.3.2) */
|
---|
| 787 | void FAST_FUNC sha256_begin(sha256_ctx_t *ctx)
|
---|
| 788 | {
|
---|
| 789 | memcpy(&ctx->total64, init256, sizeof(init256));
|
---|
| 790 | /*ctx->total64 = 0; - done by prepending two 32-bit zeros to init256 */
|
---|
| 791 | ctx->process_block = sha256_process_block64;
|
---|
| 792 | }
|
---|
| 793 |
|
---|
| 794 | /* Initialize structure containing state of computation.
|
---|
| 795 | (FIPS 180-2:5.3.3) */
|
---|
| 796 | void FAST_FUNC sha512_begin(sha512_ctx_t *ctx)
|
---|
| 797 | {
|
---|
| 798 | int i;
|
---|
| 799 | /* Two extra iterations zero out ctx->total64[2] */
|
---|
| 800 | uint64_t *tp = ctx->total64;
|
---|
| 801 | for (i = 0; i < 2+8; i++)
|
---|
| 802 | tp[i] = ((uint64_t)(init256[i]) << 32) + init512_lo[i];
|
---|
| 803 | /*ctx->total64[0] = ctx->total64[1] = 0; - already done */
|
---|
| 804 | }
|
---|
| 805 |
|
---|
| 806 | void FAST_FUNC sha512_hash(sha512_ctx_t *ctx, const void *buffer, size_t len)
|
---|
| 807 | {
|
---|
| 808 | unsigned bufpos = ctx->total64[0] & 127;
|
---|
| 809 | unsigned remaining;
|
---|
| 810 |
|
---|
| 811 | /* First increment the byte count. FIPS 180-2 specifies the possible
|
---|
| 812 | length of the file up to 2^128 _bits_.
|
---|
| 813 | We compute the number of _bytes_ and convert to bits later. */
|
---|
| 814 | ctx->total64[0] += len;
|
---|
| 815 | if (ctx->total64[0] < len)
|
---|
| 816 | ctx->total64[1]++;
|
---|
| 817 | #if 0
|
---|
| 818 | remaining = 128 - bufpos;
|
---|
| 819 |
|
---|
| 820 | /* Hash whole blocks */
|
---|
| 821 | while (len >= remaining) {
|
---|
| 822 | memcpy(ctx->wbuffer + bufpos, buffer, remaining);
|
---|
| 823 | buffer = (const char *)buffer + remaining;
|
---|
| 824 | len -= remaining;
|
---|
| 825 | remaining = 128;
|
---|
| 826 | bufpos = 0;
|
---|
| 827 | sha512_process_block128(ctx);
|
---|
| 828 | }
|
---|
| 829 |
|
---|
| 830 | /* Save last, partial blosk */
|
---|
| 831 | memcpy(ctx->wbuffer + bufpos, buffer, len);
|
---|
| 832 | #else
|
---|
| 833 | while (1) {
|
---|
| 834 | remaining = 128 - bufpos;
|
---|
| 835 | if (remaining > len)
|
---|
| 836 | remaining = len;
|
---|
| 837 | /* Copy data into aligned buffer */
|
---|
| 838 | memcpy(ctx->wbuffer + bufpos, buffer, remaining);
|
---|
| 839 | len -= remaining;
|
---|
| 840 | buffer = (const char *)buffer + remaining;
|
---|
| 841 | bufpos += remaining;
|
---|
[3232] | 842 | /* Clever way to do "if (bufpos != N) break; ... ; bufpos = 0;" */
|
---|
[2725] | 843 | bufpos -= 128;
|
---|
| 844 | if (bufpos != 0)
|
---|
| 845 | break;
|
---|
| 846 | /* Buffer is filled up, process it */
|
---|
| 847 | sha512_process_block128(ctx);
|
---|
| 848 | /*bufpos = 0; - already is */
|
---|
| 849 | }
|
---|
| 850 | #endif
|
---|
| 851 | }
|
---|
| 852 |
|
---|
| 853 | /* Used also for sha256 */
|
---|
| 854 | void FAST_FUNC sha1_end(sha1_ctx_t *ctx, void *resbuf)
|
---|
| 855 | {
|
---|
| 856 | unsigned hash_size;
|
---|
| 857 |
|
---|
| 858 | /* SHA stores total in BE, need to swap on LE arches: */
|
---|
| 859 | common64_end(ctx, /*swap_needed:*/ BB_LITTLE_ENDIAN);
|
---|
| 860 |
|
---|
| 861 | hash_size = (ctx->process_block == sha1_process_block64) ? 5 : 8;
|
---|
| 862 | /* This way we do not impose alignment constraints on resbuf: */
|
---|
| 863 | if (BB_LITTLE_ENDIAN) {
|
---|
| 864 | unsigned i;
|
---|
| 865 | for (i = 0; i < hash_size; ++i)
|
---|
| 866 | ctx->hash[i] = SWAP_BE32(ctx->hash[i]);
|
---|
| 867 | }
|
---|
| 868 | memcpy(resbuf, ctx->hash, sizeof(ctx->hash[0]) * hash_size);
|
---|
| 869 | }
|
---|
| 870 |
|
---|
| 871 | void FAST_FUNC sha512_end(sha512_ctx_t *ctx, void *resbuf)
|
---|
| 872 | {
|
---|
| 873 | unsigned bufpos = ctx->total64[0] & 127;
|
---|
| 874 |
|
---|
| 875 | /* Pad the buffer to the next 128-byte boundary with 0x80,0,0,0... */
|
---|
| 876 | ctx->wbuffer[bufpos++] = 0x80;
|
---|
| 877 |
|
---|
| 878 | while (1) {
|
---|
| 879 | unsigned remaining = 128 - bufpos;
|
---|
| 880 | memset(ctx->wbuffer + bufpos, 0, remaining);
|
---|
| 881 | if (remaining >= 16) {
|
---|
| 882 | /* Store the 128-bit counter of bits in the buffer in BE format */
|
---|
| 883 | uint64_t t;
|
---|
| 884 | t = ctx->total64[0] << 3;
|
---|
| 885 | t = SWAP_BE64(t);
|
---|
| 886 | *(uint64_t *) (&ctx->wbuffer[128 - 8]) = t;
|
---|
| 887 | t = (ctx->total64[1] << 3) | (ctx->total64[0] >> 61);
|
---|
| 888 | t = SWAP_BE64(t);
|
---|
| 889 | *(uint64_t *) (&ctx->wbuffer[128 - 16]) = t;
|
---|
| 890 | }
|
---|
| 891 | sha512_process_block128(ctx);
|
---|
| 892 | if (remaining >= 16)
|
---|
| 893 | break;
|
---|
| 894 | bufpos = 0;
|
---|
| 895 | }
|
---|
| 896 |
|
---|
| 897 | if (BB_LITTLE_ENDIAN) {
|
---|
| 898 | unsigned i;
|
---|
| 899 | for (i = 0; i < ARRAY_SIZE(ctx->hash); ++i)
|
---|
| 900 | ctx->hash[i] = SWAP_BE64(ctx->hash[i]);
|
---|
| 901 | }
|
---|
| 902 | memcpy(resbuf, ctx->hash, sizeof(ctx->hash));
|
---|
| 903 | }
|
---|
[3232] | 904 |
|
---|
| 905 |
|
---|
| 906 | /*
|
---|
| 907 | * The Keccak sponge function, designed by Guido Bertoni, Joan Daemen,
|
---|
| 908 | * Michael Peeters and Gilles Van Assche. For more information, feedback or
|
---|
| 909 | * questions, please refer to our website: http://keccak.noekeon.org/
|
---|
| 910 | *
|
---|
| 911 | * Implementation by Ronny Van Keer,
|
---|
| 912 | * hereby denoted as "the implementer".
|
---|
| 913 | *
|
---|
| 914 | * To the extent possible under law, the implementer has waived all copyright
|
---|
| 915 | * and related or neighboring rights to the source code in this file.
|
---|
| 916 | * http://creativecommons.org/publicdomain/zero/1.0/
|
---|
| 917 | *
|
---|
| 918 | * Busybox modifications (C) Lauri Kasanen, under the GPLv2.
|
---|
| 919 | */
|
---|
| 920 |
|
---|
| 921 | #if CONFIG_SHA3_SMALL < 0
|
---|
| 922 | # define SHA3_SMALL 0
|
---|
| 923 | #elif CONFIG_SHA3_SMALL > 1
|
---|
| 924 | # define SHA3_SMALL 1
|
---|
| 925 | #else
|
---|
| 926 | # define SHA3_SMALL CONFIG_SHA3_SMALL
|
---|
| 927 | #endif
|
---|
| 928 |
|
---|
| 929 | enum {
|
---|
| 930 | SHA3_IBLK_BYTES = 72, /* 576 bits / 8 */
|
---|
| 931 | };
|
---|
| 932 |
|
---|
| 933 | /*
|
---|
| 934 | * In the crypto literature this function is usually called Keccak-f().
|
---|
| 935 | */
|
---|
| 936 | static void sha3_process_block72(uint64_t *state)
|
---|
| 937 | {
|
---|
| 938 | enum { NROUNDS = 24 };
|
---|
| 939 |
|
---|
| 940 | /* Elements should be 64-bit, but top half is always zero or 0x80000000.
|
---|
| 941 | * We encode 63rd bits in a separate word below.
|
---|
| 942 | * Same is true for 31th bits, which lets us use 16-bit table instead of 64-bit.
|
---|
| 943 | * The speed penalty is lost in the noise.
|
---|
| 944 | */
|
---|
| 945 | static const uint16_t IOTA_CONST[NROUNDS] = {
|
---|
| 946 | 0x0001,
|
---|
| 947 | 0x8082,
|
---|
| 948 | 0x808a,
|
---|
| 949 | 0x8000,
|
---|
| 950 | 0x808b,
|
---|
| 951 | 0x0001,
|
---|
| 952 | 0x8081,
|
---|
| 953 | 0x8009,
|
---|
| 954 | 0x008a,
|
---|
| 955 | 0x0088,
|
---|
| 956 | 0x8009,
|
---|
| 957 | 0x000a,
|
---|
| 958 | 0x808b,
|
---|
| 959 | 0x008b,
|
---|
| 960 | 0x8089,
|
---|
| 961 | 0x8003,
|
---|
| 962 | 0x8002,
|
---|
| 963 | 0x0080,
|
---|
| 964 | 0x800a,
|
---|
| 965 | 0x000a,
|
---|
| 966 | 0x8081,
|
---|
| 967 | 0x8080,
|
---|
| 968 | 0x0001,
|
---|
| 969 | 0x8008,
|
---|
| 970 | };
|
---|
| 971 | /* bit for CONST[0] is in msb: 0011 0011 0000 0111 1101 1101 */
|
---|
| 972 | const uint32_t IOTA_CONST_bit63 = (uint32_t)(0x3307dd00);
|
---|
| 973 | /* bit for CONST[0] is in msb: 0001 0110 0011 1000 0001 1011 */
|
---|
| 974 | const uint32_t IOTA_CONST_bit31 = (uint32_t)(0x16381b00);
|
---|
| 975 |
|
---|
| 976 | static const uint8_t ROT_CONST[24] = {
|
---|
| 977 | 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 2, 14,
|
---|
| 978 | 27, 41, 56, 8, 25, 43, 62, 18, 39, 61, 20, 44,
|
---|
| 979 | };
|
---|
| 980 | static const uint8_t PI_LANE[24] = {
|
---|
| 981 | 10, 7, 11, 17, 18, 3, 5, 16, 8, 21, 24, 4,
|
---|
| 982 | 15, 23, 19, 13, 12, 2, 20, 14, 22, 9, 6, 1,
|
---|
| 983 | };
|
---|
| 984 | /*static const uint8_t MOD5[10] = { 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, };*/
|
---|
| 985 |
|
---|
| 986 | unsigned x, y;
|
---|
| 987 | unsigned round;
|
---|
| 988 |
|
---|
| 989 | if (BB_BIG_ENDIAN) {
|
---|
| 990 | for (x = 0; x < 25; x++) {
|
---|
| 991 | state[x] = SWAP_LE64(state[x]);
|
---|
| 992 | }
|
---|
| 993 | }
|
---|
| 994 |
|
---|
| 995 | for (round = 0; round < NROUNDS; ++round) {
|
---|
| 996 | /* Theta */
|
---|
| 997 | {
|
---|
| 998 | uint64_t BC[10];
|
---|
| 999 | for (x = 0; x < 5; ++x) {
|
---|
| 1000 | BC[x + 5] = BC[x] = state[x]
|
---|
| 1001 | ^ state[x + 5] ^ state[x + 10]
|
---|
| 1002 | ^ state[x + 15] ^ state[x + 20];
|
---|
| 1003 | }
|
---|
| 1004 | /* Using 2x5 vector above eliminates the need to use
|
---|
| 1005 | * BC[MOD5[x+N]] trick below to fetch BC[(x+N) % 5],
|
---|
| 1006 | * and the code is a bit _smaller_.
|
---|
| 1007 | */
|
---|
| 1008 | for (x = 0; x < 5; ++x) {
|
---|
| 1009 | uint64_t temp = BC[x + 4] ^ rotl64(BC[x + 1], 1);
|
---|
| 1010 | state[x] ^= temp;
|
---|
| 1011 | state[x + 5] ^= temp;
|
---|
| 1012 | state[x + 10] ^= temp;
|
---|
| 1013 | state[x + 15] ^= temp;
|
---|
| 1014 | state[x + 20] ^= temp;
|
---|
| 1015 | }
|
---|
| 1016 | }
|
---|
| 1017 |
|
---|
| 1018 | /* Rho Pi */
|
---|
| 1019 | if (SHA3_SMALL) {
|
---|
| 1020 | uint64_t t1 = state[1];
|
---|
| 1021 | for (x = 0; x < 24; ++x) {
|
---|
| 1022 | uint64_t t0 = state[PI_LANE[x]];
|
---|
| 1023 | state[PI_LANE[x]] = rotl64(t1, ROT_CONST[x]);
|
---|
| 1024 | t1 = t0;
|
---|
| 1025 | }
|
---|
| 1026 | } else {
|
---|
| 1027 | /* Especially large benefit for 32-bit arch (75% faster):
|
---|
| 1028 | * 64-bit rotations by non-constant usually are SLOW on those.
|
---|
| 1029 | * We resort to unrolling here.
|
---|
| 1030 | * This optimizes out PI_LANE[] and ROT_CONST[],
|
---|
| 1031 | * but generates 300-500 more bytes of code.
|
---|
| 1032 | */
|
---|
| 1033 | uint64_t t0;
|
---|
| 1034 | uint64_t t1 = state[1];
|
---|
| 1035 | #define RhoPi_twice(x) \
|
---|
| 1036 | t0 = state[PI_LANE[x ]]; \
|
---|
| 1037 | state[PI_LANE[x ]] = rotl64(t1, ROT_CONST[x ]); \
|
---|
| 1038 | t1 = state[PI_LANE[x+1]]; \
|
---|
| 1039 | state[PI_LANE[x+1]] = rotl64(t0, ROT_CONST[x+1]);
|
---|
| 1040 | RhoPi_twice(0); RhoPi_twice(2);
|
---|
| 1041 | RhoPi_twice(4); RhoPi_twice(6);
|
---|
| 1042 | RhoPi_twice(8); RhoPi_twice(10);
|
---|
| 1043 | RhoPi_twice(12); RhoPi_twice(14);
|
---|
| 1044 | RhoPi_twice(16); RhoPi_twice(18);
|
---|
| 1045 | RhoPi_twice(20); RhoPi_twice(22);
|
---|
| 1046 | #undef RhoPi_twice
|
---|
| 1047 | }
|
---|
| 1048 |
|
---|
| 1049 | /* Chi */
|
---|
| 1050 | for (y = 0; y <= 20; y += 5) {
|
---|
| 1051 | uint64_t BC0, BC1, BC2, BC3, BC4;
|
---|
| 1052 | BC0 = state[y + 0];
|
---|
| 1053 | BC1 = state[y + 1];
|
---|
| 1054 | BC2 = state[y + 2];
|
---|
| 1055 | state[y + 0] = BC0 ^ ((~BC1) & BC2);
|
---|
| 1056 | BC3 = state[y + 3];
|
---|
| 1057 | state[y + 1] = BC1 ^ ((~BC2) & BC3);
|
---|
| 1058 | BC4 = state[y + 4];
|
---|
| 1059 | state[y + 2] = BC2 ^ ((~BC3) & BC4);
|
---|
| 1060 | state[y + 3] = BC3 ^ ((~BC4) & BC0);
|
---|
| 1061 | state[y + 4] = BC4 ^ ((~BC0) & BC1);
|
---|
| 1062 | }
|
---|
| 1063 |
|
---|
| 1064 | /* Iota */
|
---|
| 1065 | state[0] ^= IOTA_CONST[round]
|
---|
| 1066 | | (uint32_t)((IOTA_CONST_bit31 << round) & 0x80000000)
|
---|
| 1067 | | (uint64_t)((IOTA_CONST_bit63 << round) & 0x80000000) << 32;
|
---|
| 1068 | }
|
---|
| 1069 |
|
---|
| 1070 | if (BB_BIG_ENDIAN) {
|
---|
| 1071 | for (x = 0; x < 25; x++) {
|
---|
| 1072 | state[x] = SWAP_LE64(state[x]);
|
---|
| 1073 | }
|
---|
| 1074 | }
|
---|
| 1075 | }
|
---|
| 1076 |
|
---|
| 1077 | void FAST_FUNC sha3_begin(sha3_ctx_t *ctx)
|
---|
| 1078 | {
|
---|
| 1079 | memset(ctx, 0, sizeof(*ctx));
|
---|
| 1080 | }
|
---|
| 1081 |
|
---|
| 1082 | void FAST_FUNC sha3_hash(sha3_ctx_t *ctx, const void *buffer, size_t len)
|
---|
| 1083 | {
|
---|
| 1084 | #if SHA3_SMALL
|
---|
| 1085 | const uint8_t *data = buffer;
|
---|
| 1086 | unsigned bufpos = ctx->bytes_queued;
|
---|
| 1087 |
|
---|
| 1088 | while (1) {
|
---|
| 1089 | unsigned remaining = SHA3_IBLK_BYTES - bufpos;
|
---|
| 1090 | if (remaining > len)
|
---|
| 1091 | remaining = len;
|
---|
| 1092 | len -= remaining;
|
---|
| 1093 | /* XOR data into buffer */
|
---|
| 1094 | while (remaining != 0) {
|
---|
| 1095 | uint8_t *buf = (uint8_t*)ctx->state;
|
---|
| 1096 | buf[bufpos] ^= *data++;
|
---|
| 1097 | bufpos++;
|
---|
| 1098 | remaining--;
|
---|
| 1099 | }
|
---|
| 1100 | /* Clever way to do "if (bufpos != N) break; ... ; bufpos = 0;" */
|
---|
| 1101 | bufpos -= SHA3_IBLK_BYTES;
|
---|
| 1102 | if (bufpos != 0)
|
---|
| 1103 | break;
|
---|
| 1104 | /* Buffer is filled up, process it */
|
---|
| 1105 | sha3_process_block72(ctx->state);
|
---|
| 1106 | /*bufpos = 0; - already is */
|
---|
| 1107 | }
|
---|
| 1108 | ctx->bytes_queued = bufpos + SHA3_IBLK_BYTES;
|
---|
| 1109 | #else
|
---|
| 1110 | /* +50 bytes code size, but a bit faster because of long-sized XORs */
|
---|
| 1111 | const uint8_t *data = buffer;
|
---|
| 1112 | unsigned bufpos = ctx->bytes_queued;
|
---|
| 1113 |
|
---|
| 1114 | /* If already data in queue, continue queuing first */
|
---|
| 1115 | while (len != 0 && bufpos != 0) {
|
---|
| 1116 | uint8_t *buf = (uint8_t*)ctx->state;
|
---|
| 1117 | buf[bufpos] ^= *data++;
|
---|
| 1118 | len--;
|
---|
| 1119 | bufpos++;
|
---|
| 1120 | if (bufpos == SHA3_IBLK_BYTES) {
|
---|
| 1121 | bufpos = 0;
|
---|
| 1122 | goto do_block;
|
---|
| 1123 | }
|
---|
| 1124 | }
|
---|
| 1125 |
|
---|
| 1126 | /* Absorb complete blocks */
|
---|
| 1127 | while (len >= SHA3_IBLK_BYTES) {
|
---|
| 1128 | /* XOR data onto beginning of state[].
|
---|
| 1129 | * We try to be efficient - operate one word at a time, not byte.
|
---|
| 1130 | * Careful wrt unaligned access: can't just use "*(long*)data"!
|
---|
| 1131 | */
|
---|
| 1132 | unsigned count = SHA3_IBLK_BYTES / sizeof(long);
|
---|
| 1133 | long *buf = (long*)ctx->state;
|
---|
| 1134 | do {
|
---|
| 1135 | long v;
|
---|
| 1136 | move_from_unaligned_long(v, (long*)data);
|
---|
| 1137 | *buf++ ^= v;
|
---|
| 1138 | data += sizeof(long);
|
---|
| 1139 | } while (--count);
|
---|
| 1140 | len -= SHA3_IBLK_BYTES;
|
---|
| 1141 | do_block:
|
---|
| 1142 | sha3_process_block72(ctx->state);
|
---|
| 1143 | }
|
---|
| 1144 |
|
---|
| 1145 | /* Queue remaining data bytes */
|
---|
| 1146 | while (len != 0) {
|
---|
| 1147 | uint8_t *buf = (uint8_t*)ctx->state;
|
---|
| 1148 | buf[bufpos] ^= *data++;
|
---|
| 1149 | bufpos++;
|
---|
| 1150 | len--;
|
---|
| 1151 | }
|
---|
| 1152 |
|
---|
| 1153 | ctx->bytes_queued = bufpos;
|
---|
| 1154 | #endif
|
---|
| 1155 | }
|
---|
| 1156 |
|
---|
| 1157 | void FAST_FUNC sha3_end(sha3_ctx_t *ctx, void *resbuf)
|
---|
| 1158 | {
|
---|
| 1159 | /* Padding */
|
---|
| 1160 | uint8_t *buf = (uint8_t*)ctx->state;
|
---|
| 1161 | buf[ctx->bytes_queued] ^= 1;
|
---|
| 1162 | buf[SHA3_IBLK_BYTES - 1] ^= 0x80;
|
---|
| 1163 |
|
---|
| 1164 | sha3_process_block72(ctx->state);
|
---|
| 1165 |
|
---|
| 1166 | /* Output */
|
---|
| 1167 | memcpy(resbuf, ctx->state, 64);
|
---|
| 1168 | }
|
---|