[3320] | 1 | /* This file is not used by busybox right now.
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| 2 | * However, the code here seems to be a tiny bit smaller
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| 3 | * than one in md5.c. Need to investigate which one
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| 4 | * is better overall...
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| 5 | * Hint: grep for md5prime to find places where you can switch
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| 6 | * md5.c/md5prime.c
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| 7 | */
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| 8 |
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| 9 | /*
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| 10 | * MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
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| 11 | *
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| 12 | * Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
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| 13 | * rights reserved.
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| 14 | *
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| 15 | * License to copy and use this software is granted provided that it
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| 16 | * is identified as the "RSA Data Security, Inc. MD5 Message-Digest
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| 17 | * Algorithm" in all material mentioning or referencing this software
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| 18 | * or this function.
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| 19 | *
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| 20 | * License is also granted to make and use derivative works provided
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| 21 | * that such works are identified as "derived from the RSA Data
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| 22 | * Security, Inc. MD5 Message-Digest Algorithm" in all material
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| 23 | * mentioning or referencing the derived work.
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| 24 | *
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| 25 | * RSA Data Security, Inc. makes no representations concerning either
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| 26 | * the merchantability of this software or the suitability of this
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| 27 | * software for any particular purpose. It is provided "as is"
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| 28 | * without express or implied warranty of any kind.
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| 29 | *
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| 30 | * These notices must be retained in any copies of any part of this
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| 31 | * documentation and/or software.
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| 32 | *
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| 33 | * $FreeBSD: src/lib/libmd/md5c.c,v 1.9.2.1 1999/08/29 14:57:12 peter Exp $
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| 34 | *
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| 35 | * This code is the same as the code published by RSA Inc. It has been
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| 36 | * edited for clarity and style only.
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| 37 | *
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| 38 | * ----------------------------------------------------------------------------
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| 39 | * The md5_crypt() function was taken from freeBSD's libcrypt and contains
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| 40 | * this license:
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| 41 | * "THE BEER-WARE LICENSE" (Revision 42):
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| 42 | * <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
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| 43 | * can do whatever you want with this stuff. If we meet some day, and you think
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| 44 | * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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| 45 | *
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| 46 | * $FreeBSD: src/lib/libcrypt/crypt.c,v 1.7.2.1 1999/08/29 14:56:33 peter Exp $
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| 47 | *
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| 48 | * ----------------------------------------------------------------------------
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| 49 | * On April 19th, 2001 md5_crypt() was modified to make it reentrant
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| 50 | * by Erik Andersen <andersen@uclibc.org>
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| 51 | *
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| 52 | * June 28, 2001 Manuel Novoa III
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| 53 | *
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| 54 | * "Un-inlined" code using loops and static const tables in order to
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| 55 | * reduce generated code size (on i386 from approx 4k to approx 2.5k).
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| 56 | *
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| 57 | * June 29, 2001 Manuel Novoa III
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| 58 | *
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| 59 | * Completely removed static PADDING array.
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| 60 | *
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| 61 | * Reintroduced the loop unrolling in md5_transform and added the
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| 62 | * MD5_SIZE_VS_SPEED option for configurability. Define below as:
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| 63 | * 0 fully unrolled loops
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| 64 | * 1 partially unrolled (4 ops per loop)
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| 65 | * 2 no unrolling -- introduces the need to swap 4 variables (slow)
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| 66 | * 3 no unrolling and all 4 loops merged into one with switch
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| 67 | * in each loop (glacial)
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| 68 | * On i386, sizes are roughly (-Os -fno-builtin):
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| 69 | * 0: 3k 1: 2.5k 2: 2.2k 3: 2k
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| 70 | *
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| 71 | * Since SuSv3 does not require crypt_r, modified again August 7, 2002
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| 72 | * by Erik Andersen to remove reentrance stuff...
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| 73 | */
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| 74 |
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| 75 | #include "libbb.h"
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| 76 |
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| 77 | /* 1: fastest, 3: smallest */
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| 78 | #if CONFIG_MD5_SIZE_VS_SPEED < 1
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| 79 | # define MD5_SIZE_VS_SPEED 1
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| 80 | #elif CONFIG_MD5_SIZE_VS_SPEED > 3
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| 81 | # define MD5_SIZE_VS_SPEED 3
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| 82 | #else
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| 83 | # define MD5_SIZE_VS_SPEED CONFIG_MD5_SIZE_VS_SPEED
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| 84 | #endif
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| 85 |
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| 86 | #if BB_LITTLE_ENDIAN
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| 87 | #define memcpy32_cpu2le memcpy
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| 88 | #define memcpy32_le2cpu memcpy
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| 89 | #else
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| 90 | /* Encodes input (uint32_t) into output (unsigned char).
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| 91 | * Assumes len is a multiple of 4. */
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| 92 | static void
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| 93 | memcpy32_cpu2le(unsigned char *output, uint32_t *input, unsigned len)
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| 94 | {
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| 95 | unsigned i, j;
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| 96 | for (i = 0, j = 0; j < len; i++, j += 4) {
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| 97 | output[j] = input[i];
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| 98 | output[j+1] = (input[i] >> 8);
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| 99 | output[j+2] = (input[i] >> 16);
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| 100 | output[j+3] = (input[i] >> 24);
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| 101 | }
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| 102 | }
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| 103 | /* Decodes input (unsigned char) into output (uint32_t).
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| 104 | * Assumes len is a multiple of 4. */
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| 105 | static void
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| 106 | memcpy32_le2cpu(uint32_t *output, const unsigned char *input, unsigned len)
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| 107 | {
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| 108 | unsigned i, j;
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| 109 | for (i = 0, j = 0; j < len; i++, j += 4)
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| 110 | output[i] = ((uint32_t)input[j])
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| 111 | | (((uint32_t)input[j+1]) << 8)
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| 112 | | (((uint32_t)input[j+2]) << 16)
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| 113 | | (((uint32_t)input[j+3]) << 24);
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| 114 | }
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| 115 | #endif /* i386 */
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| 116 |
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| 117 | /* F, G, H and I are basic MD5 functions. */
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| 118 | #define F(x, y, z) (((x) & (y)) | (~(x) & (z)))
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| 119 | #define G(x, y, z) (((x) & (z)) | ((y) & ~(z)))
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| 120 | #define H(x, y, z) ((x) ^ (y) ^ (z))
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| 121 | #define I(x, y, z) ((y) ^ ((x) | ~(z)))
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| 122 |
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| 123 | /* rotl32 rotates x left n bits. */
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| 124 | #define rotl32(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
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| 125 |
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| 126 | /*
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| 127 | * FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
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| 128 | * Rotation is separate from addition to prevent recomputation.
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| 129 | */
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| 130 | #define FF(a, b, c, d, x, s, ac) { \
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| 131 | (a) += F((b), (c), (d)) + (x) + (uint32_t)(ac); \
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| 132 | (a) = rotl32((a), (s)); \
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| 133 | (a) += (b); \
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| 134 | }
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| 135 | #define GG(a, b, c, d, x, s, ac) { \
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| 136 | (a) += G((b), (c), (d)) + (x) + (uint32_t)(ac); \
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| 137 | (a) = rotl32((a), (s)); \
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| 138 | (a) += (b); \
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| 139 | }
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| 140 | #define HH(a, b, c, d, x, s, ac) { \
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| 141 | (a) += H((b), (c), (d)) + (x) + (uint32_t)(ac); \
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| 142 | (a) = rotl32((a), (s)); \
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| 143 | (a) += (b); \
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| 144 | }
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| 145 | #define II(a, b, c, d, x, s, ac) { \
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| 146 | (a) += I((b), (c), (d)) + (x) + (uint32_t)(ac); \
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| 147 | (a) = rotl32((a), (s)); \
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| 148 | (a) += (b); \
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| 149 | }
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| 150 |
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| 151 | /* MD5 basic transformation. Transforms state based on block. */
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| 152 | static void md5_transform(uint32_t state[4], const unsigned char block[64])
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| 153 | {
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| 154 | uint32_t a, b, c, d, x[16];
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| 155 | #if MD5_SIZE_VS_SPEED > 1
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| 156 | uint32_t temp;
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| 157 | const unsigned char *ps;
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| 158 |
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| 159 | static const unsigned char S[] = {
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| 160 | 7, 12, 17, 22,
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| 161 | 5, 9, 14, 20,
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| 162 | 4, 11, 16, 23,
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| 163 | 6, 10, 15, 21
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| 164 | };
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| 165 | #endif /* MD5_SIZE_VS_SPEED > 1 */
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| 166 |
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| 167 | #if MD5_SIZE_VS_SPEED > 0
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| 168 | const uint32_t *pc;
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| 169 | const unsigned char *pp;
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| 170 | int i;
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| 171 |
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| 172 | static const uint32_t C[] = {
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| 173 | /* round 1 */
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| 174 | 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
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| 175 | 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
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| 176 | 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
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| 177 | 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
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| 178 | /* round 2 */
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| 179 | 0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
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| 180 | 0xd62f105d, 0x2441453, 0xd8a1e681, 0xe7d3fbc8,
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| 181 | 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
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| 182 | 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
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| 183 | /* round 3 */
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| 184 | 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
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| 185 | 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
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| 186 | 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x4881d05,
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| 187 | 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
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| 188 | /* round 4 */
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| 189 | 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
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| 190 | 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
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| 191 | 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
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| 192 | 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391
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| 193 | };
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| 194 | static const unsigned char P[] = {
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| 195 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, /* 1 */
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| 196 | 1, 6, 11, 0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, /* 2 */
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| 197 | 5, 8, 11, 14, 1, 4, 7, 10, 13, 0, 3, 6, 9, 12, 15, 2, /* 3 */
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| 198 | 0, 7, 14, 5, 12, 3, 10, 1, 8, 15, 6, 13, 4, 11, 2, 9 /* 4 */
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| 199 | };
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| 200 |
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| 201 | #endif /* MD5_SIZE_VS_SPEED > 0 */
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| 202 |
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| 203 | memcpy32_le2cpu(x, block, 64);
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| 204 |
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| 205 | a = state[0];
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| 206 | b = state[1];
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| 207 | c = state[2];
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| 208 | d = state[3];
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| 209 |
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| 210 | #if MD5_SIZE_VS_SPEED > 2
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| 211 | pc = C;
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| 212 | pp = P;
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| 213 | ps = S - 4;
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| 214 | for (i = 0; i < 64; i++) {
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| 215 | if ((i & 0x0f) == 0) ps += 4;
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| 216 | temp = a;
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| 217 | switch (i>>4) {
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| 218 | case 0:
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| 219 | temp += F(b, c, d);
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| 220 | break;
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| 221 | case 1:
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| 222 | temp += G(b, c, d);
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| 223 | break;
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| 224 | case 2:
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| 225 | temp += H(b, c, d);
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| 226 | break;
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| 227 | case 3:
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| 228 | temp += I(b, c, d);
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| 229 | break;
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| 230 | }
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| 231 | temp += x[*pp++] + *pc++;
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| 232 | temp = rotl32(temp, ps[i & 3]);
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| 233 | temp += b;
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| 234 | a = d; d = c; c = b; b = temp;
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| 235 | }
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| 236 | #elif MD5_SIZE_VS_SPEED > 1
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| 237 | pc = C;
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| 238 | pp = P;
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| 239 | ps = S;
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| 240 | /* Round 1 */
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| 241 | for (i = 0; i < 16; i++) {
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| 242 | FF(a, b, c, d, x[*pp], ps[i & 0x3], *pc); pp++; pc++;
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| 243 | temp = d; d = c; c = b; b = a; a = temp;
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| 244 | }
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| 245 | /* Round 2 */
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| 246 | ps += 4;
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| 247 | for (; i < 32; i++) {
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| 248 | GG(a, b, c, d, x[*pp], ps[i & 0x3], *pc); pp++; pc++;
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| 249 | temp = d; d = c; c = b; b = a; a = temp;
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| 250 | }
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| 251 | /* Round 3 */
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| 252 | ps += 4;
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| 253 | for (; i < 48; i++) {
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| 254 | HH(a, b, c, d, x[*pp], ps[i & 0x3], *pc); pp++; pc++;
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| 255 | temp = d; d = c; c = b; b = a; a = temp;
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| 256 | }
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| 257 | /* Round 4 */
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| 258 | ps += 4;
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| 259 | for (; i < 64; i++) {
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| 260 | II(a, b, c, d, x[*pp], ps[i & 0x3], *pc); pp++; pc++;
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| 261 | temp = d; d = c; c = b; b = a; a = temp;
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| 262 | }
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| 263 | #elif MD5_SIZE_VS_SPEED > 0
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| 264 | pc = C;
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| 265 | pp = P;
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| 266 | /* Round 1 */
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| 267 | for (i = 0; i < 4; i++) {
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| 268 | FF(a, b, c, d, x[*pp], 7, *pc); pp++; pc++;
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| 269 | FF(d, a, b, c, x[*pp], 12, *pc); pp++; pc++;
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| 270 | FF(c, d, a, b, x[*pp], 17, *pc); pp++; pc++;
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| 271 | FF(b, c, d, a, x[*pp], 22, *pc); pp++; pc++;
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| 272 | }
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| 273 | /* Round 2 */
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| 274 | for (i = 0; i < 4; i++) {
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| 275 | GG(a, b, c, d, x[*pp], 5, *pc); pp++; pc++;
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| 276 | GG(d, a, b, c, x[*pp], 9, *pc); pp++; pc++;
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| 277 | GG(c, d, a, b, x[*pp], 14, *pc); pp++; pc++;
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| 278 | GG(b, c, d, a, x[*pp], 20, *pc); pp++; pc++;
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| 279 | }
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| 280 | /* Round 3 */
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| 281 | for (i = 0; i < 4; i++) {
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| 282 | HH(a, b, c, d, x[*pp], 4, *pc); pp++; pc++;
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| 283 | HH(d, a, b, c, x[*pp], 11, *pc); pp++; pc++;
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| 284 | HH(c, d, a, b, x[*pp], 16, *pc); pp++; pc++;
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| 285 | HH(b, c, d, a, x[*pp], 23, *pc); pp++; pc++;
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| 286 | }
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| 287 | /* Round 4 */
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| 288 | for (i = 0; i < 4; i++) {
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| 289 | II(a, b, c, d, x[*pp], 6, *pc); pp++; pc++;
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| 290 | II(d, a, b, c, x[*pp], 10, *pc); pp++; pc++;
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| 291 | II(c, d, a, b, x[*pp], 15, *pc); pp++; pc++;
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| 292 | II(b, c, d, a, x[*pp], 21, *pc); pp++; pc++;
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| 293 | }
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| 294 | #else
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| 295 | /* Round 1 */
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| 296 | #define S11 7
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| 297 | #define S12 12
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| 298 | #define S13 17
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| 299 | #define S14 22
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| 300 | FF(a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
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| 301 | FF(d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
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| 302 | FF(c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
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| 303 | FF(b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
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| 304 | FF(a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
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| 305 | FF(d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
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| 306 | FF(c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
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| 307 | FF(b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
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| 308 | FF(a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
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| 309 | FF(d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
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| 310 | FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
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| 311 | FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
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| 312 | FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
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| 313 | FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
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| 314 | FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
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| 315 | FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
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| 316 | /* Round 2 */
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| 317 | #define S21 5
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| 318 | #define S22 9
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| 319 | #define S23 14
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| 320 | #define S24 20
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| 321 | GG(a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
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| 322 | GG(d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
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| 323 | GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
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| 324 | GG(b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
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| 325 | GG(a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
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| 326 | GG(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
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| 327 | GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
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| 328 | GG(b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
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| 329 | GG(a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
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| 330 | GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
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| 331 | GG(c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
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| 332 | GG(b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
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| 333 | GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
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| 334 | GG(d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
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| 335 | GG(c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
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| 336 | GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
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| 337 | /* Round 3 */
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| 338 | #define S31 4
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| 339 | #define S32 11
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| 340 | #define S33 16
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| 341 | #define S34 23
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| 342 | HH(a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
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| 343 | HH(d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
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| 344 | HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
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| 345 | HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
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| 346 | HH(a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
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| 347 | HH(d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
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| 348 | HH(c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
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| 349 | HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
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| 350 | HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
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| 351 | HH(d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
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| 352 | HH(c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
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| 353 | HH(b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */
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| 354 | HH(a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
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| 355 | HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
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| 356 | HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
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| 357 | HH(b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
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| 358 | /* Round 4 */
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| 359 | #define S41 6
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| 360 | #define S42 10
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| 361 | #define S43 15
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| 362 | #define S44 21
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| 363 | II(a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
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| 364 | II(d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
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| 365 | II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
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| 366 | II(b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
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| 367 | II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
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| 368 | II(d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
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| 369 | II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
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| 370 | II(b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
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| 371 | II(a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
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| 372 | II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
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| 373 | II(c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
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| 374 | II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
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| 375 | II(a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
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| 376 | II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
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| 377 | II(c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
|
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| 378 | II(b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
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| 379 | #endif
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| 380 |
|
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| 381 | state[0] += a;
|
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| 382 | state[1] += b;
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| 383 | state[2] += c;
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| 384 | state[3] += d;
|
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| 385 |
|
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| 386 | /* Zeroize sensitive information. */
|
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| 387 | memset(x, 0, sizeof(x));
|
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| 388 | }
|
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| 389 |
|
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| 390 |
|
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| 391 | /* MD5 initialization. */
|
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| 392 | void FAST_FUNC md5_begin(md5_ctx_t *context)
|
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| 393 | {
|
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| 394 | context->count[0] = context->count[1] = 0;
|
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| 395 | /* Load magic initialization constants. */
|
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| 396 | context->state[0] = 0x67452301;
|
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| 397 | context->state[1] = 0xefcdab89;
|
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| 398 | context->state[2] = 0x98badcfe;
|
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| 399 | context->state[3] = 0x10325476;
|
---|
| 400 | }
|
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| 401 |
|
---|
| 402 | /*
|
---|
| 403 | * MD5 block update operation. Continues an MD5 message-digest
|
---|
| 404 | * operation, processing another message block, and updating
|
---|
| 405 | * the context.
|
---|
| 406 | */
|
---|
| 407 | void FAST_FUNC md5_hash(const void *buffer, size_t inputLen, md5_ctx_t *context)
|
---|
| 408 | {
|
---|
| 409 | unsigned i, idx, partLen;
|
---|
| 410 | const unsigned char *input = buffer;
|
---|
| 411 |
|
---|
| 412 | /* Compute number of bytes mod 64 */
|
---|
| 413 | idx = (context->count[0] >> 3) & 0x3F;
|
---|
| 414 |
|
---|
| 415 | /* Update number of bits */
|
---|
| 416 | context->count[0] += (inputLen << 3);
|
---|
| 417 | if (context->count[0] < (inputLen << 3))
|
---|
| 418 | context->count[1]++;
|
---|
| 419 | context->count[1] += (inputLen >> 29);
|
---|
| 420 |
|
---|
| 421 | /* Transform as many times as possible. */
|
---|
| 422 | i = 0;
|
---|
| 423 | partLen = 64 - idx;
|
---|
| 424 | if (inputLen >= partLen) {
|
---|
| 425 | memcpy(&context->buffer[idx], input, partLen);
|
---|
| 426 | md5_transform(context->state, context->buffer);
|
---|
| 427 | for (i = partLen; i + 63 < inputLen; i += 64)
|
---|
| 428 | md5_transform(context->state, &input[i]);
|
---|
| 429 | idx = 0;
|
---|
| 430 | }
|
---|
| 431 |
|
---|
| 432 | /* Buffer remaining input */
|
---|
| 433 | memcpy(&context->buffer[idx], &input[i], inputLen - i);
|
---|
| 434 | }
|
---|
| 435 |
|
---|
| 436 | /*
|
---|
| 437 | * MD5 finalization. Ends an MD5 message-digest operation,
|
---|
| 438 | * writing the message digest.
|
---|
| 439 | */
|
---|
| 440 | void FAST_FUNC md5_end(void *digest, md5_ctx_t *context)
|
---|
| 441 | {
|
---|
| 442 | unsigned idx, padLen;
|
---|
| 443 | unsigned char bits[8];
|
---|
| 444 | unsigned char padding[64];
|
---|
| 445 |
|
---|
| 446 | /* Add padding followed by original length. */
|
---|
| 447 | memset(padding, 0, sizeof(padding));
|
---|
| 448 | padding[0] = 0x80;
|
---|
| 449 | /* save number of bits */
|
---|
| 450 | memcpy32_cpu2le(bits, context->count, 8);
|
---|
| 451 | /* pad out to 56 mod 64 */
|
---|
| 452 | idx = (context->count[0] >> 3) & 0x3f;
|
---|
| 453 | padLen = (idx < 56) ? (56 - idx) : (120 - idx);
|
---|
| 454 | md5_hash(padding, padLen, context);
|
---|
| 455 | /* append length (before padding) */
|
---|
| 456 | md5_hash(bits, 8, context);
|
---|
| 457 |
|
---|
| 458 | /* Store state in digest */
|
---|
| 459 | memcpy32_cpu2le(digest, context->state, 16);
|
---|
| 460 | }
|
---|