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| mbed714 |
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/*
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| mbed714 |
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***********************************************************************
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| mbed714 |
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** md5.c -- the source code for MD5 routines **
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| mbed714 |
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** RSA Data Security, Inc. MD5 Message-Digest Algorithm **
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| mbed714 |
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** Created: 2/17/90 RLR **
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| mbed714 |
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** Revised: 1/91 SRD,AJ,BSK,JT Reference C ver., 7/10 constant corr. **
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***********************************************************************
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*/
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/*
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***********************************************************************
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** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved. **
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** **
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** License to copy and use this software is granted provided that **
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** it is identified as the "RSA Data Security, Inc. MD5 Message- **
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** Digest Algorithm" in all material mentioning or referencing this **
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| mbed714 |
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** software or this function. **
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** **
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** License is also granted to make and use derivative works **
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** provided that such works are identified as "derived from the RSA **
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** Data Security, Inc. MD5 Message-Digest Algorithm" in all **
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| mbed714 |
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** material mentioning or referencing the derived work. **
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** **
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** RSA Data Security, Inc. makes no representations concerning **
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** either the merchantability of this software or the suitability **
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** of this software for any particular purpose. It is provided "as **
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** is" without express or implied warranty of any kind. **
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** **
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** These notices must be retained in any copies of any part of this **
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** documentation and/or software. **
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***********************************************************************
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*/
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#include "lwip/opt.h"
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#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
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#if CHAP_SUPPORT || MD5_SUPPORT
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#include "ppp.h"
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#include "pppdebug.h"
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#include "md5.h"
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#include <string.h>
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/*
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***********************************************************************
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| mbed714 |
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** Message-digest routines: **
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** To form the message digest for a message M **
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** (1) Initialize a context buffer mdContext using MD5Init **
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** (2) Call MD5Update on mdContext and M **
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** (3) Call MD5Final on mdContext **
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** The message digest is now in mdContext->digest[0...15] **
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***********************************************************************
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*/
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/* forward declaration */
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static void Transform (u32_t *buf, u32_t *in);
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static unsigned char PADDING[64] = {
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0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| mbed714 |
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63
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| mbed714 |
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64
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| mbed714 |
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65
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| mbed714 |
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66
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| mbed714 |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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| mbed714 |
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/* F, G, H and I are basic MD5 functions */
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#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
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#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
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#define H(x, y, z) ((x) ^ (y) ^ (z))
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#define I(x, y, z) ((y) ^ ((x) | (~z)))
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77
|
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/* ROTATE_LEFT rotates x left n bits */
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#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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80
|
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/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */
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82
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/* Rotation is separate from addition to prevent recomputation */
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#define FF(a, b, c, d, x, s, ac) \
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{(a) += F ((b), (c), (d)) + (x) + (u32_t)(ac); \
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(a) = ROTATE_LEFT ((a), (s)); \
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(a) += (b); \
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}
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#define GG(a, b, c, d, x, s, ac) \
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{(a) += G ((b), (c), (d)) + (x) + (u32_t)(ac); \
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90
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(a) = ROTATE_LEFT ((a), (s)); \
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(a) += (b); \
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}
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#define HH(a, b, c, d, x, s, ac) \
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{(a) += H ((b), (c), (d)) + (x) + (u32_t)(ac); \
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(a) = ROTATE_LEFT ((a), (s)); \
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(a) += (b); \
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}
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#define II(a, b, c, d, x, s, ac) \
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{(a) += I ((b), (c), (d)) + (x) + (u32_t)(ac); \
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(a) = ROTATE_LEFT ((a), (s)); \
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(a) += (b); \
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}
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| mbed714 |
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#ifdef __STDC__
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#define UL(x) x##UL
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#else
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#ifdef WIN32
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#define UL(x) x##UL
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#else
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#define UL(x) x
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#endif
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#endif
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/* The routine MD5Init initializes the message-digest context
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mdContext. All fields are set to zero.
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*/
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void
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MD5Init (MD5_CTX *mdContext)
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{
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mdContext->i[0] = mdContext->i[1] = (u32_t)0;
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121
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122
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/* Load magic initialization constants. */
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mdContext->buf[0] = (u32_t)0x67452301UL;
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mdContext->buf[1] = (u32_t)0xefcdab89UL;
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mdContext->buf[2] = (u32_t)0x98badcfeUL;
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mdContext->buf[3] = (u32_t)0x10325476UL;
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}
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128
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/* The routine MD5Update updates the message-digest context to
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130
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account for the presence of each of the characters inBuf[0..inLen-1]
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131
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in the message whose digest is being computed.
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*/
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133
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void
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134
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MD5Update(MD5_CTX *mdContext, unsigned char *inBuf, unsigned int inLen)
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135
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{
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136
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u32_t in[16];
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int mdi;
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unsigned int i, ii;
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139
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#if 0
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141
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PPPDEBUG(LOG_INFO, ("MD5Update: %u:%.*H\n", inLen, LWIP_MIN(inLen, 20) * 2, inBuf));
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PPPDEBUG(LOG_INFO, ("MD5Update: %u:%s\n", inLen, inBuf));
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#endif
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144
|
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145
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/* compute number of bytes mod 64 */
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146
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mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
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147
|
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| mbed714 |
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148
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/* update number of bits */
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149
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if ((mdContext->i[0] + ((u32_t)inLen << 3)) < mdContext->i[0]) {
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150
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mdContext->i[1]++;
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| mbed714 |
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151
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}
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| mbed714 |
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152
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mdContext->i[0] += ((u32_t)inLen << 3);
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| mbed714 |
0:d616ece2d859
|
153
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mdContext->i[1] += ((u32_t)inLen >> 29);
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| mbed714 |
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|
154
|
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| mbed714 |
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|
155
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while (inLen--) {
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| mbed714 |
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156
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/* add new character to buffer, increment mdi */
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| mbed714 |
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157
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mdContext->in[mdi++] = *inBuf++;
|
| mbed714 |
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|
158
|
|
| mbed714 |
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|
159
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/* transform if necessary */
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| mbed714 |
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|
160
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if (mdi == 0x40) {
|
| mbed714 |
0:d616ece2d859
|
161
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for (i = 0, ii = 0; i < 16; i++, ii += 4) {
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| mbed714 |
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162
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in[i] = (((u32_t)mdContext->in[ii+3]) << 24) |
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| mbed714 |
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|
163
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(((u32_t)mdContext->in[ii+2]) << 16) |
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| mbed714 |
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|
164
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(((u32_t)mdContext->in[ii+1]) << 8) |
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| mbed714 |
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|
165
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((u32_t)mdContext->in[ii]);
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| mbed714 |
0:d616ece2d859
|
166
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}
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| mbed714 |
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|
167
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Transform (mdContext->buf, in);
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| mbed714 |
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|
168
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mdi = 0;
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| mbed714 |
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|
169
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}
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| mbed714 |
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|
170
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}
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| mbed714 |
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|
171
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}
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|
172
|
|
| mbed714 |
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173
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/* The routine MD5Final terminates the message-digest computation and
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174
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ends with the desired message digest in mdContext->digest[0...15].
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175
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*/
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176
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void
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177
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MD5Final (unsigned char hash[], MD5_CTX *mdContext)
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178
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{
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179
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u32_t in[16];
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180
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int mdi;
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| mbed714 |
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|
181
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unsigned int i, ii;
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| mbed714 |
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182
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unsigned int padLen;
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| mbed714 |
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|
183
|
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184
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/* save number of bits */
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185
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in[14] = mdContext->i[0];
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186
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in[15] = mdContext->i[1];
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| mbed714 |
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187
|
|
| mbed714 |
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188
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/* compute number of bytes mod 64 */
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189
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mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
|
| mbed714 |
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|
190
|
|
| mbed714 |
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191
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/* pad out to 56 mod 64 */
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192
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padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);
|
| mbed714 |
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193
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MD5Update (mdContext, PADDING, padLen);
|
| mbed714 |
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194
|
|
| mbed714 |
0:d616ece2d859
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195
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/* append length in bits and transform */
|
| mbed714 |
0:d616ece2d859
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196
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for (i = 0, ii = 0; i < 14; i++, ii += 4) {
|
| mbed714 |
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197
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in[i] = (((u32_t)mdContext->in[ii+3]) << 24) |
|
| mbed714 |
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198
|
(((u32_t)mdContext->in[ii+2]) << 16) |
|
| mbed714 |
0:d616ece2d859
|
199
|
(((u32_t)mdContext->in[ii+1]) << 8) |
|
| mbed714 |
0:d616ece2d859
|
200
|
((u32_t)mdContext->in[ii]);
|
| mbed714 |
0:d616ece2d859
|
201
|
}
|
| mbed714 |
0:d616ece2d859
|
202
|
Transform (mdContext->buf, in);
|
| mbed714 |
0:d616ece2d859
|
203
|
|
| mbed714 |
0:d616ece2d859
|
204
|
/* store buffer in digest */
|
| mbed714 |
0:d616ece2d859
|
205
|
for (i = 0, ii = 0; i < 4; i++, ii += 4) {
|
| mbed714 |
0:d616ece2d859
|
206
|
mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF);
|
| mbed714 |
0:d616ece2d859
|
207
|
mdContext->digest[ii+1] =
|
| mbed714 |
0:d616ece2d859
|
208
|
(unsigned char)((mdContext->buf[i] >> 8) & 0xFF);
|
| mbed714 |
0:d616ece2d859
|
209
|
mdContext->digest[ii+2] =
|
| mbed714 |
0:d616ece2d859
|
210
|
(unsigned char)((mdContext->buf[i] >> 16) & 0xFF);
|
| mbed714 |
0:d616ece2d859
|
211
|
mdContext->digest[ii+3] =
|
| mbed714 |
0:d616ece2d859
|
212
|
(unsigned char)((mdContext->buf[i] >> 24) & 0xFF);
|
| mbed714 |
0:d616ece2d859
|
213
|
}
|
| mbed714 |
0:d616ece2d859
|
214
|
SMEMCPY(hash, mdContext->digest, 16);
|
| mbed714 |
0:d616ece2d859
|
215
|
}
|
| mbed714 |
0:d616ece2d859
|
216
|
|
| mbed714 |
0:d616ece2d859
|
217
|
/* Basic MD5 step. Transforms buf based on in.
|
| mbed714 |
0:d616ece2d859
|
218
|
*/
|
| mbed714 |
0:d616ece2d859
|
219
|
static void
|
| mbed714 |
0:d616ece2d859
|
220
|
Transform (u32_t *buf, u32_t *in)
|
| mbed714 |
0:d616ece2d859
|
221
|
{
|
| mbed714 |
0:d616ece2d859
|
222
|
u32_t a = buf[0], b = buf[1], c = buf[2], d = buf[3];
|
| mbed714 |
0:d616ece2d859
|
223
|
|
| mbed714 |
0:d616ece2d859
|
224
|
/* Round 1 */
|
| mbed714 |
0:d616ece2d859
|
225
|
#define S11 7
|
| mbed714 |
0:d616ece2d859
|
226
|
#define S12 12
|
| mbed714 |
0:d616ece2d859
|
227
|
#define S13 17
|
| mbed714 |
0:d616ece2d859
|
228
|
#define S14 22
|
| mbed714 |
0:d616ece2d859
|
229
|
FF ( a, b, c, d, in[ 0], S11, UL(3614090360)); /* 1 */
|
| mbed714 |
0:d616ece2d859
|
230
|
FF ( d, a, b, c, in[ 1], S12, UL(3905402710)); /* 2 */
|
| mbed714 |
0:d616ece2d859
|
231
|
FF ( c, d, a, b, in[ 2], S13, UL( 606105819)); /* 3 */
|
| mbed714 |
0:d616ece2d859
|
232
|
FF ( b, c, d, a, in[ 3], S14, UL(3250441966)); /* 4 */
|
| mbed714 |
0:d616ece2d859
|
233
|
FF ( a, b, c, d, in[ 4], S11, UL(4118548399)); /* 5 */
|
| mbed714 |
0:d616ece2d859
|
234
|
FF ( d, a, b, c, in[ 5], S12, UL(1200080426)); /* 6 */
|
| mbed714 |
0:d616ece2d859
|
235
|
FF ( c, d, a, b, in[ 6], S13, UL(2821735955)); /* 7 */
|
| mbed714 |
0:d616ece2d859
|
236
|
FF ( b, c, d, a, in[ 7], S14, UL(4249261313)); /* 8 */
|
| mbed714 |
0:d616ece2d859
|
237
|
FF ( a, b, c, d, in[ 8], S11, UL(1770035416)); /* 9 */
|
| mbed714 |
0:d616ece2d859
|
238
|
FF ( d, a, b, c, in[ 9], S12, UL(2336552879)); /* 10 */
|
| mbed714 |
0:d616ece2d859
|
239
|
FF ( c, d, a, b, in[10], S13, UL(4294925233)); /* 11 */
|
| mbed714 |
0:d616ece2d859
|
240
|
FF ( b, c, d, a, in[11], S14, UL(2304563134)); /* 12 */
|
| mbed714 |
0:d616ece2d859
|
241
|
FF ( a, b, c, d, in[12], S11, UL(1804603682)); /* 13 */
|
| mbed714 |
0:d616ece2d859
|
242
|
FF ( d, a, b, c, in[13], S12, UL(4254626195)); /* 14 */
|
| mbed714 |
0:d616ece2d859
|
243
|
FF ( c, d, a, b, in[14], S13, UL(2792965006)); /* 15 */
|
| mbed714 |
0:d616ece2d859
|
244
|
FF ( b, c, d, a, in[15], S14, UL(1236535329)); /* 16 */
|
| mbed714 |
0:d616ece2d859
|
245
|
|
| mbed714 |
0:d616ece2d859
|
246
|
/* Round 2 */
|
| mbed714 |
0:d616ece2d859
|
247
|
#define S21 5
|
| mbed714 |
0:d616ece2d859
|
248
|
#define S22 9
|
| mbed714 |
0:d616ece2d859
|
249
|
#define S23 14
|
| mbed714 |
0:d616ece2d859
|
250
|
#define S24 20
|
| mbed714 |
0:d616ece2d859
|
251
|
GG ( a, b, c, d, in[ 1], S21, UL(4129170786)); /* 17 */
|
| mbed714 |
0:d616ece2d859
|
252
|
GG ( d, a, b, c, in[ 6], S22, UL(3225465664)); /* 18 */
|
| mbed714 |
0:d616ece2d859
|
253
|
GG ( c, d, a, b, in[11], S23, UL( 643717713)); /* 19 */
|
| mbed714 |
0:d616ece2d859
|
254
|
GG ( b, c, d, a, in[ 0], S24, UL(3921069994)); /* 20 */
|
| mbed714 |
0:d616ece2d859
|
255
|
GG ( a, b, c, d, in[ 5], S21, UL(3593408605)); /* 21 */
|
| mbed714 |
0:d616ece2d859
|
256
|
GG ( d, a, b, c, in[10], S22, UL( 38016083)); /* 22 */
|
| mbed714 |
0:d616ece2d859
|
257
|
GG ( c, d, a, b, in[15], S23, UL(3634488961)); /* 23 */
|
| mbed714 |
0:d616ece2d859
|
258
|
GG ( b, c, d, a, in[ 4], S24, UL(3889429448)); /* 24 */
|
| mbed714 |
0:d616ece2d859
|
259
|
GG ( a, b, c, d, in[ 9], S21, UL( 568446438)); /* 25 */
|
| mbed714 |
0:d616ece2d859
|
260
|
GG ( d, a, b, c, in[14], S22, UL(3275163606)); /* 26 */
|
| mbed714 |
0:d616ece2d859
|
261
|
GG ( c, d, a, b, in[ 3], S23, UL(4107603335)); /* 27 */
|
| mbed714 |
0:d616ece2d859
|
262
|
GG ( b, c, d, a, in[ 8], S24, UL(1163531501)); /* 28 */
|
| mbed714 |
0:d616ece2d859
|
263
|
GG ( a, b, c, d, in[13], S21, UL(2850285829)); /* 29 */
|
| mbed714 |
0:d616ece2d859
|
264
|
GG ( d, a, b, c, in[ 2], S22, UL(4243563512)); /* 30 */
|
| mbed714 |
0:d616ece2d859
|
265
|
GG ( c, d, a, b, in[ 7], S23, UL(1735328473)); /* 31 */
|
| mbed714 |
0:d616ece2d859
|
266
|
GG ( b, c, d, a, in[12], S24, UL(2368359562)); /* 32 */
|
| mbed714 |
0:d616ece2d859
|
267
|
|
| mbed714 |
0:d616ece2d859
|
268
|
/* Round 3 */
|
| mbed714 |
0:d616ece2d859
|
269
|
#define S31 4
|
| mbed714 |
0:d616ece2d859
|
270
|
#define S32 11
|
| mbed714 |
0:d616ece2d859
|
271
|
#define S33 16
|
| mbed714 |
0:d616ece2d859
|
272
|
#define S34 23
|
| mbed714 |
0:d616ece2d859
|
273
|
HH ( a, b, c, d, in[ 5], S31, UL(4294588738)); /* 33 */
|
| mbed714 |
0:d616ece2d859
|
274
|
HH ( d, a, b, c, in[ 8], S32, UL(2272392833)); /* 34 */
|
| mbed714 |
0:d616ece2d859
|
275
|
HH ( c, d, a, b, in[11], S33, UL(1839030562)); /* 35 */
|
| mbed714 |
0:d616ece2d859
|
276
|
HH ( b, c, d, a, in[14], S34, UL(4259657740)); /* 36 */
|
| mbed714 |
0:d616ece2d859
|
277
|
HH ( a, b, c, d, in[ 1], S31, UL(2763975236)); /* 37 */
|
| mbed714 |
0:d616ece2d859
|
278
|
HH ( d, a, b, c, in[ 4], S32, UL(1272893353)); /* 38 */
|
| mbed714 |
0:d616ece2d859
|
279
|
HH ( c, d, a, b, in[ 7], S33, UL(4139469664)); /* 39 */
|
| mbed714 |
0:d616ece2d859
|
280
|
HH ( b, c, d, a, in[10], S34, UL(3200236656)); /* 40 */
|
| mbed714 |
0:d616ece2d859
|
281
|
HH ( a, b, c, d, in[13], S31, UL( 681279174)); /* 41 */
|
| mbed714 |
0:d616ece2d859
|
282
|
HH ( d, a, b, c, in[ 0], S32, UL(3936430074)); /* 42 */
|
| mbed714 |
0:d616ece2d859
|
283
|
HH ( c, d, a, b, in[ 3], S33, UL(3572445317)); /* 43 */
|
| mbed714 |
0:d616ece2d859
|
284
|
HH ( b, c, d, a, in[ 6], S34, UL( 76029189)); /* 44 */
|
| mbed714 |
0:d616ece2d859
|
285
|
HH ( a, b, c, d, in[ 9], S31, UL(3654602809)); /* 45 */
|
| mbed714 |
0:d616ece2d859
|
286
|
HH ( d, a, b, c, in[12], S32, UL(3873151461)); /* 46 */
|
| mbed714 |
0:d616ece2d859
|
287
|
HH ( c, d, a, b, in[15], S33, UL( 530742520)); /* 47 */
|
| mbed714 |
0:d616ece2d859
|
288
|
HH ( b, c, d, a, in[ 2], S34, UL(3299628645)); /* 48 */
|
| mbed714 |
0:d616ece2d859
|
289
|
|
| mbed714 |
0:d616ece2d859
|
290
|
/* Round 4 */
|
| mbed714 |
0:d616ece2d859
|
291
|
#define S41 6
|
| mbed714 |
0:d616ece2d859
|
292
|
#define S42 10
|
| mbed714 |
0:d616ece2d859
|
293
|
#define S43 15
|
| mbed714 |
0:d616ece2d859
|
294
|
#define S44 21
|
| mbed714 |
0:d616ece2d859
|
295
|
II ( a, b, c, d, in[ 0], S41, UL(4096336452)); /* 49 */
|
| mbed714 |
0:d616ece2d859
|
296
|
II ( d, a, b, c, in[ 7], S42, UL(1126891415)); /* 50 */
|
| mbed714 |
0:d616ece2d859
|
297
|
II ( c, d, a, b, in[14], S43, UL(2878612391)); /* 51 */
|
| mbed714 |
0:d616ece2d859
|
298
|
II ( b, c, d, a, in[ 5], S44, UL(4237533241)); /* 52 */
|
| mbed714 |
0:d616ece2d859
|
299
|
II ( a, b, c, d, in[12], S41, UL(1700485571)); /* 53 */
|
| mbed714 |
0:d616ece2d859
|
300
|
II ( d, a, b, c, in[ 3], S42, UL(2399980690)); /* 54 */
|
| mbed714 |
0:d616ece2d859
|
301
|
II ( c, d, a, b, in[10], S43, UL(4293915773)); /* 55 */
|
| mbed714 |
0:d616ece2d859
|
302
|
II ( b, c, d, a, in[ 1], S44, UL(2240044497)); /* 56 */
|
| mbed714 |
0:d616ece2d859
|
303
|
II ( a, b, c, d, in[ 8], S41, UL(1873313359)); /* 57 */
|
| mbed714 |
0:d616ece2d859
|
304
|
II ( d, a, b, c, in[15], S42, UL(4264355552)); /* 58 */
|
| mbed714 |
0:d616ece2d859
|
305
|
II ( c, d, a, b, in[ 6], S43, UL(2734768916)); /* 59 */
|
| mbed714 |
0:d616ece2d859
|
306
|
II ( b, c, d, a, in[13], S44, UL(1309151649)); /* 60 */
|
| mbed714 |
0:d616ece2d859
|
307
|
II ( a, b, c, d, in[ 4], S41, UL(4149444226)); /* 61 */
|
| mbed714 |
0:d616ece2d859
|
308
|
II ( d, a, b, c, in[11], S42, UL(3174756917)); /* 62 */
|
| mbed714 |
0:d616ece2d859
|
309
|
II ( c, d, a, b, in[ 2], S43, UL( 718787259)); /* 63 */
|
| mbed714 |
0:d616ece2d859
|
310
|
II ( b, c, d, a, in[ 9], S44, UL(3951481745)); /* 64 */
|
| mbed714 |
0:d616ece2d859
|
311
|
|
| mbed714 |
0:d616ece2d859
|
312
|
buf[0] += a;
|
| mbed714 |
0:d616ece2d859
|
313
|
buf[1] += b;
|
| mbed714 |
0:d616ece2d859
|
314
|
buf[2] += c;
|
| mbed714 |
0:d616ece2d859
|
315
|
buf[3] += d;
|
| mbed714 |
0:d616ece2d859
|
316
|
}
|
| mbed714 |
0:d616ece2d859
|
317
|
|
| mbed714 |
0:d616ece2d859
|
318
|
#endif /* CHAP_SUPPORT || MD5_SUPPORT */
|
| mbed714 |
0:d616ece2d859
|
319
|
|
| mbed714 |
0:d616ece2d859
|
320
|
#endif /* PPP_SUPPORT */
|
Daniel Peter