Adam Green / Mbed 2 deprecated WeatherStation

Web server based weather station using Sparkfun Weather Meters.

Dependencies:   FatFileSystem mbed WeatherMeters SDFileSystem

NetStack/lwip/netif/ppp/md5.c@1:c7958aa34fa1, 2012-02-25 (annotated)

Committer:
AdamGreen
Date:
Sat Feb 25 03:28:05 2012 +0000
Revision:
1:c7958aa34fa1
Parent:
0:616601bde9fb 
Use published libraries where possible.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AdamGreen 0:616601bde9fb 1 /*
AdamGreen 0:616601bde9fb 2 ***********************************************************************
AdamGreen 0:616601bde9fb 3 ** md5.c -- the source code for MD5 routines **
AdamGreen 0:616601bde9fb 4 ** RSA Data Security, Inc. MD5 Message-Digest Algorithm **
AdamGreen 0:616601bde9fb 5 ** Created: 2/17/90 RLR **
AdamGreen 0:616601bde9fb 6 ** Revised: 1/91 SRD,AJ,BSK,JT Reference C ver., 7/10 constant corr. **
AdamGreen 0:616601bde9fb 7 ***********************************************************************
AdamGreen 0:616601bde9fb 8 */
AdamGreen 0:616601bde9fb 9
AdamGreen 0:616601bde9fb 10 /*
AdamGreen 0:616601bde9fb 11 ***********************************************************************
AdamGreen 0:616601bde9fb 12 ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved. **
AdamGreen 0:616601bde9fb 13 ** **
AdamGreen 0:616601bde9fb 14 ** License to copy and use this software is granted provided that **
AdamGreen 0:616601bde9fb 15 ** it is identified as the "RSA Data Security, Inc. MD5 Message- **
AdamGreen 0:616601bde9fb 16 ** Digest Algorithm" in all material mentioning or referencing this **
AdamGreen 0:616601bde9fb 17 ** software or this function. **
AdamGreen 0:616601bde9fb 18 ** **
AdamGreen 0:616601bde9fb 19 ** License is also granted to make and use derivative works **
AdamGreen 0:616601bde9fb 20 ** provided that such works are identified as "derived from the RSA **
AdamGreen 0:616601bde9fb 21 ** Data Security, Inc. MD5 Message-Digest Algorithm" in all **
AdamGreen 0:616601bde9fb 22 ** material mentioning or referencing the derived work. **
AdamGreen 0:616601bde9fb 23 ** **
AdamGreen 0:616601bde9fb 24 ** RSA Data Security, Inc. makes no representations concerning **
AdamGreen 0:616601bde9fb 25 ** either the merchantability of this software or the suitability **
AdamGreen 0:616601bde9fb 26 ** of this software for any particular purpose. It is provided "as **
AdamGreen 0:616601bde9fb 27 ** is" without express or implied warranty of any kind. **
AdamGreen 0:616601bde9fb 28 ** **
AdamGreen 0:616601bde9fb 29 ** These notices must be retained in any copies of any part of this **
AdamGreen 0:616601bde9fb 30 ** documentation and/or software. **
AdamGreen 0:616601bde9fb 31 ***********************************************************************
AdamGreen 0:616601bde9fb 32 */
AdamGreen 0:616601bde9fb 33
AdamGreen 0:616601bde9fb 34 #include "lwip/opt.h"
AdamGreen 0:616601bde9fb 35
AdamGreen 0:616601bde9fb 36 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
AdamGreen 0:616601bde9fb 37
AdamGreen 0:616601bde9fb 38 #if CHAP_SUPPORT || MD5_SUPPORT
AdamGreen 0:616601bde9fb 39
AdamGreen 0:616601bde9fb 40 #include "ppp.h"
AdamGreen 0:616601bde9fb 41 #include "pppdebug.h"
AdamGreen 0:616601bde9fb 42
AdamGreen 0:616601bde9fb 43 #include "md5.h"
AdamGreen 0:616601bde9fb 44
AdamGreen 0:616601bde9fb 45 #include <string.h>
AdamGreen 0:616601bde9fb 46
AdamGreen 0:616601bde9fb 47 /*
AdamGreen 0:616601bde9fb 48 ***********************************************************************
AdamGreen 0:616601bde9fb 49 ** Message-digest routines: **
AdamGreen 0:616601bde9fb 50 ** To form the message digest for a message M **
AdamGreen 0:616601bde9fb 51 ** (1) Initialize a context buffer mdContext using MD5Init **
AdamGreen 0:616601bde9fb 52 ** (2) Call MD5Update on mdContext and M **
AdamGreen 0:616601bde9fb 53 ** (3) Call MD5Final on mdContext **
AdamGreen 0:616601bde9fb 54 ** The message digest is now in mdContext->digest[0...15] **
AdamGreen 0:616601bde9fb 55 ***********************************************************************
AdamGreen 0:616601bde9fb 56 */
AdamGreen 0:616601bde9fb 57
AdamGreen 0:616601bde9fb 58 /* forward declaration */
AdamGreen 0:616601bde9fb 59 static void Transform (u32_t *buf, u32_t *in);
AdamGreen 0:616601bde9fb 60
AdamGreen 0:616601bde9fb 61 static unsigned char PADDING[64] = {
AdamGreen 0:616601bde9fb 62 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
AdamGreen 0:616601bde9fb 63 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
AdamGreen 0:616601bde9fb 64 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
AdamGreen 0:616601bde9fb 65 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
AdamGreen 0:616601bde9fb 66 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
AdamGreen 0:616601bde9fb 67 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
AdamGreen 0:616601bde9fb 68 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
AdamGreen 0:616601bde9fb 69 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
AdamGreen 0:616601bde9fb 70 };
AdamGreen 0:616601bde9fb 71
AdamGreen 0:616601bde9fb 72 /* F, G, H and I are basic MD5 functions */
AdamGreen 0:616601bde9fb 73 #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
AdamGreen 0:616601bde9fb 74 #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
AdamGreen 0:616601bde9fb 75 #define H(x, y, z) ((x) ^ (y) ^ (z))
AdamGreen 0:616601bde9fb 76 #define I(x, y, z) ((y) ^ ((x) | (~z)))
AdamGreen 0:616601bde9fb 77
AdamGreen 0:616601bde9fb 78 /* ROTATE_LEFT rotates x left n bits */
AdamGreen 0:616601bde9fb 79 #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
AdamGreen 0:616601bde9fb 80
AdamGreen 0:616601bde9fb 81 /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */
AdamGreen 0:616601bde9fb 82 /* Rotation is separate from addition to prevent recomputation */
AdamGreen 0:616601bde9fb 83 #define FF(a, b, c, d, x, s, ac) \
AdamGreen 0:616601bde9fb 84 {(a) += F ((b), (c), (d)) + (x) + (u32_t)(ac); \
AdamGreen 0:616601bde9fb 85 (a) = ROTATE_LEFT ((a), (s)); \
AdamGreen 0:616601bde9fb 86 (a) += (b); \
AdamGreen 0:616601bde9fb 87 }
AdamGreen 0:616601bde9fb 88 #define GG(a, b, c, d, x, s, ac) \
AdamGreen 0:616601bde9fb 89 {(a) += G ((b), (c), (d)) + (x) + (u32_t)(ac); \
AdamGreen 0:616601bde9fb 90 (a) = ROTATE_LEFT ((a), (s)); \
AdamGreen 0:616601bde9fb 91 (a) += (b); \
AdamGreen 0:616601bde9fb 92 }
AdamGreen 0:616601bde9fb 93 #define HH(a, b, c, d, x, s, ac) \
AdamGreen 0:616601bde9fb 94 {(a) += H ((b), (c), (d)) + (x) + (u32_t)(ac); \
AdamGreen 0:616601bde9fb 95 (a) = ROTATE_LEFT ((a), (s)); \
AdamGreen 0:616601bde9fb 96 (a) += (b); \
AdamGreen 0:616601bde9fb 97 }
AdamGreen 0:616601bde9fb 98 #define II(a, b, c, d, x, s, ac) \
AdamGreen 0:616601bde9fb 99 {(a) += I ((b), (c), (d)) + (x) + (u32_t)(ac); \
AdamGreen 0:616601bde9fb 100 (a) = ROTATE_LEFT ((a), (s)); \
AdamGreen 0:616601bde9fb 101 (a) += (b); \
AdamGreen 0:616601bde9fb 102 }
AdamGreen 0:616601bde9fb 103
AdamGreen 0:616601bde9fb 104 #ifdef __STDC__
AdamGreen 0:616601bde9fb 105 #define UL(x) x##UL
AdamGreen 0:616601bde9fb 106 #else
AdamGreen 0:616601bde9fb 107 #ifdef WIN32
AdamGreen 0:616601bde9fb 108 #define UL(x) x##UL
AdamGreen 0:616601bde9fb 109 #else
AdamGreen 0:616601bde9fb 110 #define UL(x) x
AdamGreen 0:616601bde9fb 111 #endif
AdamGreen 0:616601bde9fb 112 #endif
AdamGreen 0:616601bde9fb 113
AdamGreen 0:616601bde9fb 114 /* The routine MD5Init initializes the message-digest context
AdamGreen 0:616601bde9fb 115 mdContext. All fields are set to zero.
AdamGreen 0:616601bde9fb 116 */
AdamGreen 0:616601bde9fb 117 void
AdamGreen 0:616601bde9fb 118 MD5Init (MD5_CTX *mdContext)
AdamGreen 0:616601bde9fb 119 {
AdamGreen 0:616601bde9fb 120 mdContext->i[0] = mdContext->i[1] = (u32_t)0;
AdamGreen 0:616601bde9fb 121
AdamGreen 0:616601bde9fb 122 /* Load magic initialization constants. */
AdamGreen 0:616601bde9fb 123 mdContext->buf[0] = (u32_t)0x67452301UL;
AdamGreen 0:616601bde9fb 124 mdContext->buf[1] = (u32_t)0xefcdab89UL;
AdamGreen 0:616601bde9fb 125 mdContext->buf[2] = (u32_t)0x98badcfeUL;
AdamGreen 0:616601bde9fb 126 mdContext->buf[3] = (u32_t)0x10325476UL;
AdamGreen 0:616601bde9fb 127 }
AdamGreen 0:616601bde9fb 128
AdamGreen 0:616601bde9fb 129 /* The routine MD5Update updates the message-digest context to
AdamGreen 0:616601bde9fb 130 account for the presence of each of the characters inBuf[0..inLen-1]
AdamGreen 0:616601bde9fb 131 in the message whose digest is being computed.
AdamGreen 0:616601bde9fb 132 */
AdamGreen 0:616601bde9fb 133 void
AdamGreen 0:616601bde9fb 134 MD5Update(MD5_CTX *mdContext, unsigned char *inBuf, unsigned int inLen)
AdamGreen 0:616601bde9fb 135 {
AdamGreen 0:616601bde9fb 136 u32_t in[16];
AdamGreen 0:616601bde9fb 137 int mdi;
AdamGreen 0:616601bde9fb 138 unsigned int i, ii;
AdamGreen 0:616601bde9fb 139
AdamGreen 0:616601bde9fb 140 #if 0
AdamGreen 0:616601bde9fb 141 PPPDEBUG(LOG_INFO, ("MD5Update: %u:%.*H\n", inLen, LWIP_MIN(inLen, 20) * 2, inBuf));
AdamGreen 0:616601bde9fb 142 PPPDEBUG(LOG_INFO, ("MD5Update: %u:%s\n", inLen, inBuf));
AdamGreen 0:616601bde9fb 143 #endif
AdamGreen 0:616601bde9fb 144
AdamGreen 0:616601bde9fb 145 /* compute number of bytes mod 64 */
AdamGreen 0:616601bde9fb 146 mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
AdamGreen 0:616601bde9fb 147
AdamGreen 0:616601bde9fb 148 /* update number of bits */
AdamGreen 0:616601bde9fb 149 if ((mdContext->i[0] + ((u32_t)inLen << 3)) < mdContext->i[0]) {
AdamGreen 0:616601bde9fb 150 mdContext->i[1]++;
AdamGreen 0:616601bde9fb 151 }
AdamGreen 0:616601bde9fb 152 mdContext->i[0] += ((u32_t)inLen << 3);
AdamGreen 0:616601bde9fb 153 mdContext->i[1] += ((u32_t)inLen >> 29);
AdamGreen 0:616601bde9fb 154
AdamGreen 0:616601bde9fb 155 while (inLen--) {
AdamGreen 0:616601bde9fb 156 /* add new character to buffer, increment mdi */
AdamGreen 0:616601bde9fb 157 mdContext->in[mdi++] = *inBuf++;
AdamGreen 0:616601bde9fb 158
AdamGreen 0:616601bde9fb 159 /* transform if necessary */
AdamGreen 0:616601bde9fb 160 if (mdi == 0x40) {
AdamGreen 0:616601bde9fb 161 for (i = 0, ii = 0; i < 16; i++, ii += 4) {
AdamGreen 0:616601bde9fb 162 in[i] = (((u32_t)mdContext->in[ii+3]) << 24) |
AdamGreen 0:616601bde9fb 163 (((u32_t)mdContext->in[ii+2]) << 16) |
AdamGreen 0:616601bde9fb 164 (((u32_t)mdContext->in[ii+1]) << 8) |
AdamGreen 0:616601bde9fb 165 ((u32_t)mdContext->in[ii]);
AdamGreen 0:616601bde9fb 166 }
AdamGreen 0:616601bde9fb 167 Transform (mdContext->buf, in);
AdamGreen 0:616601bde9fb 168 mdi = 0;
AdamGreen 0:616601bde9fb 169 }
AdamGreen 0:616601bde9fb 170 }
AdamGreen 0:616601bde9fb 171 }
AdamGreen 0:616601bde9fb 172
AdamGreen 0:616601bde9fb 173 /* The routine MD5Final terminates the message-digest computation and
AdamGreen 0:616601bde9fb 174 ends with the desired message digest in mdContext->digest[0...15].
AdamGreen 0:616601bde9fb 175 */
AdamGreen 0:616601bde9fb 176 void
AdamGreen 0:616601bde9fb 177 MD5Final (unsigned char hash[], MD5_CTX *mdContext)
AdamGreen 0:616601bde9fb 178 {
AdamGreen 0:616601bde9fb 179 u32_t in[16];
AdamGreen 0:616601bde9fb 180 int mdi;
AdamGreen 0:616601bde9fb 181 unsigned int i, ii;
AdamGreen 0:616601bde9fb 182 unsigned int padLen;
AdamGreen 0:616601bde9fb 183
AdamGreen 0:616601bde9fb 184 /* save number of bits */
AdamGreen 0:616601bde9fb 185 in[14] = mdContext->i[0];
AdamGreen 0:616601bde9fb 186 in[15] = mdContext->i[1];
AdamGreen 0:616601bde9fb 187
AdamGreen 0:616601bde9fb 188 /* compute number of bytes mod 64 */
AdamGreen 0:616601bde9fb 189 mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
AdamGreen 0:616601bde9fb 190
AdamGreen 0:616601bde9fb 191 /* pad out to 56 mod 64 */
AdamGreen 0:616601bde9fb 192 padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);
AdamGreen 0:616601bde9fb 193 MD5Update (mdContext, PADDING, padLen);
AdamGreen 0:616601bde9fb 194
AdamGreen 0:616601bde9fb 195 /* append length in bits and transform */
AdamGreen 0:616601bde9fb 196 for (i = 0, ii = 0; i < 14; i++, ii += 4) {
AdamGreen 0:616601bde9fb 197 in[i] = (((u32_t)mdContext->in[ii+3]) << 24) |
AdamGreen 0:616601bde9fb 198 (((u32_t)mdContext->in[ii+2]) << 16) |
AdamGreen 0:616601bde9fb 199 (((u32_t)mdContext->in[ii+1]) << 8) |
AdamGreen 0:616601bde9fb 200 ((u32_t)mdContext->in[ii]);
AdamGreen 0:616601bde9fb 201 }
AdamGreen 0:616601bde9fb 202 Transform (mdContext->buf, in);
AdamGreen 0:616601bde9fb 203
AdamGreen 0:616601bde9fb 204 /* store buffer in digest */
AdamGreen 0:616601bde9fb 205 for (i = 0, ii = 0; i < 4; i++, ii += 4) {
AdamGreen 0:616601bde9fb 206 mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF);
AdamGreen 0:616601bde9fb 207 mdContext->digest[ii+1] =
AdamGreen 0:616601bde9fb 208 (unsigned char)((mdContext->buf[i] >> 8) & 0xFF);
AdamGreen 0:616601bde9fb 209 mdContext->digest[ii+2] =
AdamGreen 0:616601bde9fb 210 (unsigned char)((mdContext->buf[i] >> 16) & 0xFF);
AdamGreen 0:616601bde9fb 211 mdContext->digest[ii+3] =
AdamGreen 0:616601bde9fb 212 (unsigned char)((mdContext->buf[i] >> 24) & 0xFF);
AdamGreen 0:616601bde9fb 213 }
AdamGreen 0:616601bde9fb 214 SMEMCPY(hash, mdContext->digest, 16);
AdamGreen 0:616601bde9fb 215 }
AdamGreen 0:616601bde9fb 216
AdamGreen 0:616601bde9fb 217 /* Basic MD5 step. Transforms buf based on in.
AdamGreen 0:616601bde9fb 218 */
AdamGreen 0:616601bde9fb 219 static void
AdamGreen 0:616601bde9fb 220 Transform (u32_t *buf, u32_t *in)
AdamGreen 0:616601bde9fb 221 {
AdamGreen 0:616601bde9fb 222 u32_t a = buf[0], b = buf[1], c = buf[2], d = buf[3];
AdamGreen 0:616601bde9fb 223
AdamGreen 0:616601bde9fb 224 /* Round 1 */
AdamGreen 0:616601bde9fb 225 #define S11 7
AdamGreen 0:616601bde9fb 226 #define S12 12
AdamGreen 0:616601bde9fb 227 #define S13 17
AdamGreen 0:616601bde9fb 228 #define S14 22
AdamGreen 0:616601bde9fb 229 FF ( a, b, c, d, in[ 0], S11, UL(3614090360)); /* 1 */
AdamGreen 0:616601bde9fb 230 FF ( d, a, b, c, in[ 1], S12, UL(3905402710)); /* 2 */
AdamGreen 0:616601bde9fb 231 FF ( c, d, a, b, in[ 2], S13, UL( 606105819)); /* 3 */
AdamGreen 0:616601bde9fb 232 FF ( b, c, d, a, in[ 3], S14, UL(3250441966)); /* 4 */
AdamGreen 0:616601bde9fb 233 FF ( a, b, c, d, in[ 4], S11, UL(4118548399)); /* 5 */
AdamGreen 0:616601bde9fb 234 FF ( d, a, b, c, in[ 5], S12, UL(1200080426)); /* 6 */
AdamGreen 0:616601bde9fb 235 FF ( c, d, a, b, in[ 6], S13, UL(2821735955)); /* 7 */
AdamGreen 0:616601bde9fb 236 FF ( b, c, d, a, in[ 7], S14, UL(4249261313)); /* 8 */
AdamGreen 0:616601bde9fb 237 FF ( a, b, c, d, in[ 8], S11, UL(1770035416)); /* 9 */
AdamGreen 0:616601bde9fb 238 FF ( d, a, b, c, in[ 9], S12, UL(2336552879)); /* 10 */
AdamGreen 0:616601bde9fb 239 FF ( c, d, a, b, in[10], S13, UL(4294925233)); /* 11 */
AdamGreen 0:616601bde9fb 240 FF ( b, c, d, a, in[11], S14, UL(2304563134)); /* 12 */
AdamGreen 0:616601bde9fb 241 FF ( a, b, c, d, in[12], S11, UL(1804603682)); /* 13 */
AdamGreen 0:616601bde9fb 242 FF ( d, a, b, c, in[13], S12, UL(4254626195)); /* 14 */
AdamGreen 0:616601bde9fb 243 FF ( c, d, a, b, in[14], S13, UL(2792965006)); /* 15 */
AdamGreen 0:616601bde9fb 244 FF ( b, c, d, a, in[15], S14, UL(1236535329)); /* 16 */
AdamGreen 0:616601bde9fb 245
AdamGreen 0:616601bde9fb 246 /* Round 2 */
AdamGreen 0:616601bde9fb 247 #define S21 5
AdamGreen 0:616601bde9fb 248 #define S22 9
AdamGreen 0:616601bde9fb 249 #define S23 14
AdamGreen 0:616601bde9fb 250 #define S24 20
AdamGreen 0:616601bde9fb 251 GG ( a, b, c, d, in[ 1], S21, UL(4129170786)); /* 17 */
AdamGreen 0:616601bde9fb 252 GG ( d, a, b, c, in[ 6], S22, UL(3225465664)); /* 18 */
AdamGreen 0:616601bde9fb 253 GG ( c, d, a, b, in[11], S23, UL( 643717713)); /* 19 */
AdamGreen 0:616601bde9fb 254 GG ( b, c, d, a, in[ 0], S24, UL(3921069994)); /* 20 */
AdamGreen 0:616601bde9fb 255 GG ( a, b, c, d, in[ 5], S21, UL(3593408605)); /* 21 */
AdamGreen 0:616601bde9fb 256 GG ( d, a, b, c, in[10], S22, UL( 38016083)); /* 22 */
AdamGreen 0:616601bde9fb 257 GG ( c, d, a, b, in[15], S23, UL(3634488961)); /* 23 */
AdamGreen 0:616601bde9fb 258 GG ( b, c, d, a, in[ 4], S24, UL(3889429448)); /* 24 */
AdamGreen 0:616601bde9fb 259 GG ( a, b, c, d, in[ 9], S21, UL( 568446438)); /* 25 */
AdamGreen 0:616601bde9fb 260 GG ( d, a, b, c, in[14], S22, UL(3275163606)); /* 26 */
AdamGreen 0:616601bde9fb 261 GG ( c, d, a, b, in[ 3], S23, UL(4107603335)); /* 27 */
AdamGreen 0:616601bde9fb 262 GG ( b, c, d, a, in[ 8], S24, UL(1163531501)); /* 28 */
AdamGreen 0:616601bde9fb 263 GG ( a, b, c, d, in[13], S21, UL(2850285829)); /* 29 */
AdamGreen 0:616601bde9fb 264 GG ( d, a, b, c, in[ 2], S22, UL(4243563512)); /* 30 */
AdamGreen 0:616601bde9fb 265 GG ( c, d, a, b, in[ 7], S23, UL(1735328473)); /* 31 */
AdamGreen 0:616601bde9fb 266 GG ( b, c, d, a, in[12], S24, UL(2368359562)); /* 32 */
AdamGreen 0:616601bde9fb 267
AdamGreen 0:616601bde9fb 268 /* Round 3 */
AdamGreen 0:616601bde9fb 269 #define S31 4
AdamGreen 0:616601bde9fb 270 #define S32 11
AdamGreen 0:616601bde9fb 271 #define S33 16
AdamGreen 0:616601bde9fb 272 #define S34 23
AdamGreen 0:616601bde9fb 273 HH ( a, b, c, d, in[ 5], S31, UL(4294588738)); /* 33 */
AdamGreen 0:616601bde9fb 274 HH ( d, a, b, c, in[ 8], S32, UL(2272392833)); /* 34 */
AdamGreen 0:616601bde9fb 275 HH ( c, d, a, b, in[11], S33, UL(1839030562)); /* 35 */
AdamGreen 0:616601bde9fb 276 HH ( b, c, d, a, in[14], S34, UL(4259657740)); /* 36 */
AdamGreen 0:616601bde9fb 277 HH ( a, b, c, d, in[ 1], S31, UL(2763975236)); /* 37 */
AdamGreen 0:616601bde9fb 278 HH ( d, a, b, c, in[ 4], S32, UL(1272893353)); /* 38 */
AdamGreen 0:616601bde9fb 279 HH ( c, d, a, b, in[ 7], S33, UL(4139469664)); /* 39 */
AdamGreen 0:616601bde9fb 280 HH ( b, c, d, a, in[10], S34, UL(3200236656)); /* 40 */
AdamGreen 0:616601bde9fb 281 HH ( a, b, c, d, in[13], S31, UL( 681279174)); /* 41 */
AdamGreen 0:616601bde9fb 282 HH ( d, a, b, c, in[ 0], S32, UL(3936430074)); /* 42 */
AdamGreen 0:616601bde9fb 283 HH ( c, d, a, b, in[ 3], S33, UL(3572445317)); /* 43 */
AdamGreen 0:616601bde9fb 284 HH ( b, c, d, a, in[ 6], S34, UL( 76029189)); /* 44 */
AdamGreen 0:616601bde9fb 285 HH ( a, b, c, d, in[ 9], S31, UL(3654602809)); /* 45 */
AdamGreen 0:616601bde9fb 286 HH ( d, a, b, c, in[12], S32, UL(3873151461)); /* 46 */
AdamGreen 0:616601bde9fb 287 HH ( c, d, a, b, in[15], S33, UL( 530742520)); /* 47 */
AdamGreen 0:616601bde9fb 288 HH ( b, c, d, a, in[ 2], S34, UL(3299628645)); /* 48 */
AdamGreen 0:616601bde9fb 289
AdamGreen 0:616601bde9fb 290 /* Round 4 */
AdamGreen 0:616601bde9fb 291 #define S41 6
AdamGreen 0:616601bde9fb 292 #define S42 10
AdamGreen 0:616601bde9fb 293 #define S43 15
AdamGreen 0:616601bde9fb 294 #define S44 21
AdamGreen 0:616601bde9fb 295 II ( a, b, c, d, in[ 0], S41, UL(4096336452)); /* 49 */
AdamGreen 0:616601bde9fb 296 II ( d, a, b, c, in[ 7], S42, UL(1126891415)); /* 50 */
AdamGreen 0:616601bde9fb 297 II ( c, d, a, b, in[14], S43, UL(2878612391)); /* 51 */
AdamGreen 0:616601bde9fb 298 II ( b, c, d, a, in[ 5], S44, UL(4237533241)); /* 52 */
AdamGreen 0:616601bde9fb 299 II ( a, b, c, d, in[12], S41, UL(1700485571)); /* 53 */
AdamGreen 0:616601bde9fb 300 II ( d, a, b, c, in[ 3], S42, UL(2399980690)); /* 54 */
AdamGreen 0:616601bde9fb 301 II ( c, d, a, b, in[10], S43, UL(4293915773)); /* 55 */
AdamGreen 0:616601bde9fb 302 II ( b, c, d, a, in[ 1], S44, UL(2240044497)); /* 56 */
AdamGreen 0:616601bde9fb 303 II ( a, b, c, d, in[ 8], S41, UL(1873313359)); /* 57 */
AdamGreen 0:616601bde9fb 304 II ( d, a, b, c, in[15], S42, UL(4264355552)); /* 58 */
AdamGreen 0:616601bde9fb 305 II ( c, d, a, b, in[ 6], S43, UL(2734768916)); /* 59 */
AdamGreen 0:616601bde9fb 306 II ( b, c, d, a, in[13], S44, UL(1309151649)); /* 60 */
AdamGreen 0:616601bde9fb 307 II ( a, b, c, d, in[ 4], S41, UL(4149444226)); /* 61 */
AdamGreen 0:616601bde9fb 308 II ( d, a, b, c, in[11], S42, UL(3174756917)); /* 62 */
AdamGreen 0:616601bde9fb 309 II ( c, d, a, b, in[ 2], S43, UL( 718787259)); /* 63 */
AdamGreen 0:616601bde9fb 310 II ( b, c, d, a, in[ 9], S44, UL(3951481745)); /* 64 */
AdamGreen 0:616601bde9fb 311
AdamGreen 0:616601bde9fb 312 buf[0] += a;
AdamGreen 0:616601bde9fb 313 buf[1] += b;
AdamGreen 0:616601bde9fb 314 buf[2] += c;
AdamGreen 0:616601bde9fb 315 buf[3] += d;
AdamGreen 0:616601bde9fb 316 }
AdamGreen 0:616601bde9fb 317
AdamGreen 0:616601bde9fb 318 #endif /* CHAP_SUPPORT || MD5_SUPPORT */
AdamGreen 0:616601bde9fb 319
AdamGreen 0:616601bde9fb 320 #endif /* PPP_SUPPORT */