[164] | 1 | /* md4.c
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| 2 | *
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| 3 | * Copyright (C) 2006-2015 wolfSSL Inc.
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| 4 | *
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| 5 | * This file is part of wolfSSL. (formerly known as CyaSSL)
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| 6 | *
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| 7 | * wolfSSL is free software; you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation; either version 2 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * wolfSSL is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with this program; if not, write to the Free Software
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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| 20 | */
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| 21 |
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| 22 | #ifdef HAVE_CONFIG_H
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| 23 | #include <config.h>
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| 24 | #endif
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| 25 |
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| 26 | #include <wolfssl/wolfcrypt/settings.h>
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| 27 |
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| 28 | #ifndef NO_MD4
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| 29 |
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| 30 | #include <wolfssl/wolfcrypt/md4.h>
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| 31 | #ifdef NO_INLINE
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| 32 | #include <wolfssl/wolfcrypt/misc.h>
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| 33 | #else
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| 34 | #include <wolfcrypt/src/misc.c>
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| 35 | #endif
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| 36 |
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| 37 |
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| 38 | #ifdef min
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| 39 | #define WOLFSSL_HAVE_MIN
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| 40 | #endif
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| 41 | #ifndef WOLFSSL_HAVE_MIN
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| 42 | #define WOLFSSL_HAVE_MIN
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| 43 |
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| 44 | static INLINE word32 min(word32 a, word32 b)
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| 45 | {
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| 46 | return a > b ? b : a;
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| 47 | }
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| 48 |
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| 49 | #endif /* WOLFSSL_HAVE_MIN */
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| 50 |
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| 51 |
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| 52 | void wc_InitMd4(Md4* md4)
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| 53 | {
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| 54 | md4->digest[0] = 0x67452301L;
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| 55 | md4->digest[1] = 0xefcdab89L;
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| 56 | md4->digest[2] = 0x98badcfeL;
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| 57 | md4->digest[3] = 0x10325476L;
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| 58 |
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| 59 | md4->buffLen = 0;
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| 60 | md4->loLen = 0;
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| 61 | md4->hiLen = 0;
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| 62 | }
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| 63 |
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| 64 |
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| 65 | static void Transform(Md4* md4)
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| 66 | {
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| 67 | #define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
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| 68 | #define G(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))
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| 69 | #define H(x, y, z) ((x) ^ (y) ^ (z))
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| 70 |
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| 71 | /* Copy context->state[] to working vars */
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| 72 | word32 A = md4->digest[0];
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| 73 | word32 B = md4->digest[1];
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| 74 | word32 C = md4->digest[2];
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| 75 | word32 D = md4->digest[3];
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| 76 |
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| 77 | #define function(a,b,c,d,k,s) a=rotlFixed(a+F(b,c,d)+md4->buffer[k],s);
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| 78 | function(A,B,C,D, 0, 3);
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| 79 | function(D,A,B,C, 1, 7);
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| 80 | function(C,D,A,B, 2,11);
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| 81 | function(B,C,D,A, 3,19);
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| 82 | function(A,B,C,D, 4, 3);
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| 83 | function(D,A,B,C, 5, 7);
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| 84 | function(C,D,A,B, 6,11);
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| 85 | function(B,C,D,A, 7,19);
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| 86 | function(A,B,C,D, 8, 3);
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| 87 | function(D,A,B,C, 9, 7);
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| 88 | function(C,D,A,B,10,11);
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| 89 | function(B,C,D,A,11,19);
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| 90 | function(A,B,C,D,12, 3);
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| 91 | function(D,A,B,C,13, 7);
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| 92 | function(C,D,A,B,14,11);
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| 93 | function(B,C,D,A,15,19);
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| 94 |
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| 95 | #undef function
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| 96 | #define function(a,b,c,d,k,s) \
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| 97 | a=rotlFixed(a+G(b,c,d)+md4->buffer[k]+0x5a827999,s);
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| 98 |
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| 99 | function(A,B,C,D, 0, 3);
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| 100 | function(D,A,B,C, 4, 5);
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| 101 | function(C,D,A,B, 8, 9);
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| 102 | function(B,C,D,A,12,13);
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| 103 | function(A,B,C,D, 1, 3);
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| 104 | function(D,A,B,C, 5, 5);
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| 105 | function(C,D,A,B, 9, 9);
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| 106 | function(B,C,D,A,13,13);
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| 107 | function(A,B,C,D, 2, 3);
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| 108 | function(D,A,B,C, 6, 5);
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| 109 | function(C,D,A,B,10, 9);
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| 110 | function(B,C,D,A,14,13);
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| 111 | function(A,B,C,D, 3, 3);
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| 112 | function(D,A,B,C, 7, 5);
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| 113 | function(C,D,A,B,11, 9);
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| 114 | function(B,C,D,A,15,13);
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| 115 |
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| 116 | #undef function
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| 117 | #define function(a,b,c,d,k,s) \
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| 118 | a=rotlFixed(a+H(b,c,d)+md4->buffer[k]+0x6ed9eba1,s);
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| 119 |
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| 120 | function(A,B,C,D, 0, 3);
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| 121 | function(D,A,B,C, 8, 9);
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| 122 | function(C,D,A,B, 4,11);
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| 123 | function(B,C,D,A,12,15);
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| 124 | function(A,B,C,D, 2, 3);
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| 125 | function(D,A,B,C,10, 9);
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| 126 | function(C,D,A,B, 6,11);
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| 127 | function(B,C,D,A,14,15);
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| 128 | function(A,B,C,D, 1, 3);
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| 129 | function(D,A,B,C, 9, 9);
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| 130 | function(C,D,A,B, 5,11);
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| 131 | function(B,C,D,A,13,15);
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| 132 | function(A,B,C,D, 3, 3);
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| 133 | function(D,A,B,C,11, 9);
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| 134 | function(C,D,A,B, 7,11);
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| 135 | function(B,C,D,A,15,15);
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| 136 |
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| 137 | /* Add the working vars back into digest state[] */
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| 138 | md4->digest[0] += A;
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| 139 | md4->digest[1] += B;
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| 140 | md4->digest[2] += C;
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| 141 | md4->digest[3] += D;
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| 142 | }
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| 143 |
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| 144 |
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| 145 | static INLINE void AddLength(Md4* md4, word32 len)
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| 146 | {
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| 147 | word32 tmp = md4->loLen;
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| 148 | if ( (md4->loLen += len) < tmp)
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| 149 | md4->hiLen++; /* carry low to high */
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| 150 | }
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| 151 |
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| 152 |
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| 153 | void wc_Md4Update(Md4* md4, const byte* data, word32 len)
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| 154 | {
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| 155 | /* do block size increments */
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| 156 | byte* local = (byte*)md4->buffer;
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| 157 |
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| 158 | while (len) {
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| 159 | word32 add = min(len, MD4_BLOCK_SIZE - md4->buffLen);
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| 160 | XMEMCPY(&local[md4->buffLen], data, add);
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| 161 |
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| 162 | md4->buffLen += add;
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| 163 | data += add;
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| 164 | len -= add;
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| 165 |
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| 166 | if (md4->buffLen == MD4_BLOCK_SIZE) {
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| 167 | #ifdef BIG_ENDIAN_ORDER
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| 168 | ByteReverseWords(md4->buffer, md4->buffer, MD4_BLOCK_SIZE);
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| 169 | #endif
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| 170 | Transform(md4);
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| 171 | AddLength(md4, MD4_BLOCK_SIZE);
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| 172 | md4->buffLen = 0;
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| 173 | }
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| 174 | }
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| 175 | }
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| 176 |
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| 177 |
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| 178 | void wc_Md4Final(Md4* md4, byte* hash)
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| 179 | {
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| 180 | byte* local = (byte*)md4->buffer;
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| 181 |
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| 182 | AddLength(md4, md4->buffLen); /* before adding pads */
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| 183 |
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| 184 | local[md4->buffLen++] = 0x80; /* add 1 */
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| 185 |
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| 186 | /* pad with zeros */
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| 187 | if (md4->buffLen > MD4_PAD_SIZE) {
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| 188 | XMEMSET(&local[md4->buffLen], 0, MD4_BLOCK_SIZE - md4->buffLen);
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| 189 | md4->buffLen += MD4_BLOCK_SIZE - md4->buffLen;
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| 190 |
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| 191 | #ifdef BIG_ENDIAN_ORDER
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| 192 | ByteReverseWords(md4->buffer, md4->buffer, MD4_BLOCK_SIZE);
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| 193 | #endif
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| 194 | Transform(md4);
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| 195 | md4->buffLen = 0;
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| 196 | }
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| 197 | XMEMSET(&local[md4->buffLen], 0, MD4_PAD_SIZE - md4->buffLen);
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| 198 |
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| 199 | /* put lengths in bits */
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| 200 | md4->hiLen = (md4->loLen >> (8*sizeof(md4->loLen) - 3)) +
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| 201 | (md4->hiLen << 3);
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| 202 | md4->loLen = md4->loLen << 3;
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| 203 |
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| 204 | /* store lengths */
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| 205 | #ifdef BIG_ENDIAN_ORDER
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| 206 | ByteReverseWords(md4->buffer, md4->buffer, MD4_BLOCK_SIZE);
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| 207 | #endif
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| 208 | /* ! length ordering dependent on digest endian type ! */
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| 209 | XMEMCPY(&local[MD4_PAD_SIZE], &md4->loLen, sizeof(word32));
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| 210 | XMEMCPY(&local[MD4_PAD_SIZE + sizeof(word32)], &md4->hiLen, sizeof(word32));
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| 211 |
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| 212 | Transform(md4);
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| 213 | #ifdef BIG_ENDIAN_ORDER
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| 214 | ByteReverseWords(md4->digest, md4->digest, MD4_DIGEST_SIZE);
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| 215 | #endif
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| 216 | XMEMCPY(hash, md4->digest, MD4_DIGEST_SIZE);
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| 217 |
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| 218 | wc_InitMd4(md4); /* reset state */
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| 219 | }
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| 220 |
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| 221 |
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| 222 | #endif /* NO_MD4 */
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| 223 |
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