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Dependencies:   mbed

NetServices/lwip/netif/ppp/md5.c@1:f5ac63519541, 2014-03-05 (annotated)

Committer:
Michael J. Spencer
Date:
Wed Mar 05 06:14:02 2014 -0800
Revision:
1:f5ac63519541
Initial commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Michael J. Spencer 1:f5ac63519541 1 /*
Michael J. Spencer 1:f5ac63519541 2 ***********************************************************************
Michael J. Spencer 1:f5ac63519541 3 ** md5.c -- the source code for MD5 routines **
Michael J. Spencer 1:f5ac63519541 4 ** RSA Data Security, Inc. MD5 Message-Digest Algorithm **
Michael J. Spencer 1:f5ac63519541 5 ** Created: 2/17/90 RLR **
Michael J. Spencer 1:f5ac63519541 6 ** Revised: 1/91 SRD,AJ,BSK,JT Reference C ver., 7/10 constant corr. **
Michael J. Spencer 1:f5ac63519541 7 ***********************************************************************
Michael J. Spencer 1:f5ac63519541 8 */
Michael J. Spencer 1:f5ac63519541 9
Michael J. Spencer 1:f5ac63519541 10 /*
Michael J. Spencer 1:f5ac63519541 11 ***********************************************************************
Michael J. Spencer 1:f5ac63519541 12 ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved. **
Michael J. Spencer 1:f5ac63519541 13 ** **
Michael J. Spencer 1:f5ac63519541 14 ** License to copy and use this software is granted provided that **
Michael J. Spencer 1:f5ac63519541 15 ** it is identified as the "RSA Data Security, Inc. MD5 Message- **
Michael J. Spencer 1:f5ac63519541 16 ** Digest Algorithm" in all material mentioning or referencing this **
Michael J. Spencer 1:f5ac63519541 17 ** software or this function. **
Michael J. Spencer 1:f5ac63519541 18 ** **
Michael J. Spencer 1:f5ac63519541 19 ** License is also granted to make and use derivative works **
Michael J. Spencer 1:f5ac63519541 20 ** provided that such works are identified as "derived from the RSA **
Michael J. Spencer 1:f5ac63519541 21 ** Data Security, Inc. MD5 Message-Digest Algorithm" in all **
Michael J. Spencer 1:f5ac63519541 22 ** material mentioning or referencing the derived work. **
Michael J. Spencer 1:f5ac63519541 23 ** **
Michael J. Spencer 1:f5ac63519541 24 ** RSA Data Security, Inc. makes no representations concerning **
Michael J. Spencer 1:f5ac63519541 25 ** either the merchantability of this software or the suitability **
Michael J. Spencer 1:f5ac63519541 26 ** of this software for any particular purpose. It is provided "as **
Michael J. Spencer 1:f5ac63519541 27 ** is" without express or implied warranty of any kind. **
Michael J. Spencer 1:f5ac63519541 28 ** **
Michael J. Spencer 1:f5ac63519541 29 ** These notices must be retained in any copies of any part of this **
Michael J. Spencer 1:f5ac63519541 30 ** documentation and/or software. **
Michael J. Spencer 1:f5ac63519541 31 ***********************************************************************
Michael J. Spencer 1:f5ac63519541 32 */
Michael J. Spencer 1:f5ac63519541 33
Michael J. Spencer 1:f5ac63519541 34 #include "lwip/opt.h"
Michael J. Spencer 1:f5ac63519541 35
Michael J. Spencer 1:f5ac63519541 36 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
Michael J. Spencer 1:f5ac63519541 37
Michael J. Spencer 1:f5ac63519541 38 #if CHAP_SUPPORT || MD5_SUPPORT
Michael J. Spencer 1:f5ac63519541 39
Michael J. Spencer 1:f5ac63519541 40 #include "ppp.h"
Michael J. Spencer 1:f5ac63519541 41 #include "pppdebug.h"
Michael J. Spencer 1:f5ac63519541 42
Michael J. Spencer 1:f5ac63519541 43 #include "md5.h"
Michael J. Spencer 1:f5ac63519541 44
Michael J. Spencer 1:f5ac63519541 45 #include <string.h>
Michael J. Spencer 1:f5ac63519541 46
Michael J. Spencer 1:f5ac63519541 47 /*
Michael J. Spencer 1:f5ac63519541 48 ***********************************************************************
Michael J. Spencer 1:f5ac63519541 49 ** Message-digest routines: **
Michael J. Spencer 1:f5ac63519541 50 ** To form the message digest for a message M **
Michael J. Spencer 1:f5ac63519541 51 ** (1) Initialize a context buffer mdContext using MD5Init **
Michael J. Spencer 1:f5ac63519541 52 ** (2) Call MD5Update on mdContext and M **
Michael J. Spencer 1:f5ac63519541 53 ** (3) Call MD5Final on mdContext **
Michael J. Spencer 1:f5ac63519541 54 ** The message digest is now in mdContext->digest[0...15] **
Michael J. Spencer 1:f5ac63519541 55 ***********************************************************************
Michael J. Spencer 1:f5ac63519541 56 */
Michael J. Spencer 1:f5ac63519541 57
Michael J. Spencer 1:f5ac63519541 58 /* forward declaration */
Michael J. Spencer 1:f5ac63519541 59 static void Transform (u32_t *buf, u32_t *in);
Michael J. Spencer 1:f5ac63519541 60
Michael J. Spencer 1:f5ac63519541 61 static unsigned char PADDING[64] = {
Michael J. Spencer 1:f5ac63519541 62 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
Michael J. Spencer 1:f5ac63519541 63 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
Michael J. Spencer 1:f5ac63519541 64 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
Michael J. Spencer 1:f5ac63519541 65 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
Michael J. Spencer 1:f5ac63519541 66 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
Michael J. Spencer 1:f5ac63519541 67 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
Michael J. Spencer 1:f5ac63519541 68 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
Michael J. Spencer 1:f5ac63519541 69 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
Michael J. Spencer 1:f5ac63519541 70 };
Michael J. Spencer 1:f5ac63519541 71
Michael J. Spencer 1:f5ac63519541 72 /* F, G, H and I are basic MD5 functions */
Michael J. Spencer 1:f5ac63519541 73 #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
Michael J. Spencer 1:f5ac63519541 74 #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
Michael J. Spencer 1:f5ac63519541 75 #define H(x, y, z) ((x) ^ (y) ^ (z))
Michael J. Spencer 1:f5ac63519541 76 #define I(x, y, z) ((y) ^ ((x) | (~z)))
Michael J. Spencer 1:f5ac63519541 77
Michael J. Spencer 1:f5ac63519541 78 /* ROTATE_LEFT rotates x left n bits */
Michael J. Spencer 1:f5ac63519541 79 #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
Michael J. Spencer 1:f5ac63519541 80
Michael J. Spencer 1:f5ac63519541 81 /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */
Michael J. Spencer 1:f5ac63519541 82 /* Rotation is separate from addition to prevent recomputation */
Michael J. Spencer 1:f5ac63519541 83 #define FF(a, b, c, d, x, s, ac) \
Michael J. Spencer 1:f5ac63519541 84 {(a) += F ((b), (c), (d)) + (x) + (u32_t)(ac); \
Michael J. Spencer 1:f5ac63519541 85 (a) = ROTATE_LEFT ((a), (s)); \
Michael J. Spencer 1:f5ac63519541 86 (a) += (b); \
Michael J. Spencer 1:f5ac63519541 87 }
Michael J. Spencer 1:f5ac63519541 88 #define GG(a, b, c, d, x, s, ac) \
Michael J. Spencer 1:f5ac63519541 89 {(a) += G ((b), (c), (d)) + (x) + (u32_t)(ac); \
Michael J. Spencer 1:f5ac63519541 90 (a) = ROTATE_LEFT ((a), (s)); \
Michael J. Spencer 1:f5ac63519541 91 (a) += (b); \
Michael J. Spencer 1:f5ac63519541 92 }
Michael J. Spencer 1:f5ac63519541 93 #define HH(a, b, c, d, x, s, ac) \
Michael J. Spencer 1:f5ac63519541 94 {(a) += H ((b), (c), (d)) + (x) + (u32_t)(ac); \
Michael J. Spencer 1:f5ac63519541 95 (a) = ROTATE_LEFT ((a), (s)); \
Michael J. Spencer 1:f5ac63519541 96 (a) += (b); \
Michael J. Spencer 1:f5ac63519541 97 }
Michael J. Spencer 1:f5ac63519541 98 #define II(a, b, c, d, x, s, ac) \
Michael J. Spencer 1:f5ac63519541 99 {(a) += I ((b), (c), (d)) + (x) + (u32_t)(ac); \
Michael J. Spencer 1:f5ac63519541 100 (a) = ROTATE_LEFT ((a), (s)); \
Michael J. Spencer 1:f5ac63519541 101 (a) += (b); \
Michael J. Spencer 1:f5ac63519541 102 }
Michael J. Spencer 1:f5ac63519541 103
Michael J. Spencer 1:f5ac63519541 104 #ifdef __STDC__
Michael J. Spencer 1:f5ac63519541 105 #define UL(x) x##UL
Michael J. Spencer 1:f5ac63519541 106 #else
Michael J. Spencer 1:f5ac63519541 107 #ifdef WIN32
Michael J. Spencer 1:f5ac63519541 108 #define UL(x) x##UL
Michael J. Spencer 1:f5ac63519541 109 #else
Michael J. Spencer 1:f5ac63519541 110 #define UL(x) x
Michael J. Spencer 1:f5ac63519541 111 #endif
Michael J. Spencer 1:f5ac63519541 112 #endif
Michael J. Spencer 1:f5ac63519541 113
Michael J. Spencer 1:f5ac63519541 114 /* The routine MD5Init initializes the message-digest context
Michael J. Spencer 1:f5ac63519541 115 mdContext. All fields are set to zero.
Michael J. Spencer 1:f5ac63519541 116 */
Michael J. Spencer 1:f5ac63519541 117 void
Michael J. Spencer 1:f5ac63519541 118 MD5Init (MD5_CTX *mdContext)
Michael J. Spencer 1:f5ac63519541 119 {
Michael J. Spencer 1:f5ac63519541 120 mdContext->i[0] = mdContext->i[1] = (u32_t)0;
Michael J. Spencer 1:f5ac63519541 121
Michael J. Spencer 1:f5ac63519541 122 /* Load magic initialization constants. */
Michael J. Spencer 1:f5ac63519541 123 mdContext->buf[0] = (u32_t)0x67452301UL;
Michael J. Spencer 1:f5ac63519541 124 mdContext->buf[1] = (u32_t)0xefcdab89UL;
Michael J. Spencer 1:f5ac63519541 125 mdContext->buf[2] = (u32_t)0x98badcfeUL;
Michael J. Spencer 1:f5ac63519541 126 mdContext->buf[3] = (u32_t)0x10325476UL;
Michael J. Spencer 1:f5ac63519541 127 }
Michael J. Spencer 1:f5ac63519541 128
Michael J. Spencer 1:f5ac63519541 129 /* The routine MD5Update updates the message-digest context to
Michael J. Spencer 1:f5ac63519541 130 account for the presence of each of the characters inBuf[0..inLen-1]
Michael J. Spencer 1:f5ac63519541 131 in the message whose digest is being computed.
Michael J. Spencer 1:f5ac63519541 132 */
Michael J. Spencer 1:f5ac63519541 133 void
Michael J. Spencer 1:f5ac63519541 134 MD5Update(MD5_CTX *mdContext, unsigned char *inBuf, unsigned int inLen)
Michael J. Spencer 1:f5ac63519541 135 {
Michael J. Spencer 1:f5ac63519541 136 u32_t in[16];
Michael J. Spencer 1:f5ac63519541 137 int mdi;
Michael J. Spencer 1:f5ac63519541 138 unsigned int i, ii;
Michael J. Spencer 1:f5ac63519541 139
Michael J. Spencer 1:f5ac63519541 140 #if 0
Michael J. Spencer 1:f5ac63519541 141 PPPDEBUG(LOG_INFO, ("MD5Update: %u:%.*H\n", inLen, LWIP_MIN(inLen, 20) * 2, inBuf));
Michael J. Spencer 1:f5ac63519541 142 PPPDEBUG(LOG_INFO, ("MD5Update: %u:%s\n", inLen, inBuf));
Michael J. Spencer 1:f5ac63519541 143 #endif
Michael J. Spencer 1:f5ac63519541 144
Michael J. Spencer 1:f5ac63519541 145 /* compute number of bytes mod 64 */
Michael J. Spencer 1:f5ac63519541 146 mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
Michael J. Spencer 1:f5ac63519541 147
Michael J. Spencer 1:f5ac63519541 148 /* update number of bits */
Michael J. Spencer 1:f5ac63519541 149 if ((mdContext->i[0] + ((u32_t)inLen << 3)) < mdContext->i[0]) {
Michael J. Spencer 1:f5ac63519541 150 mdContext->i[1]++;
Michael J. Spencer 1:f5ac63519541 151 }
Michael J. Spencer 1:f5ac63519541 152 mdContext->i[0] += ((u32_t)inLen << 3);
Michael J. Spencer 1:f5ac63519541 153 mdContext->i[1] += ((u32_t)inLen >> 29);
Michael J. Spencer 1:f5ac63519541 154
Michael J. Spencer 1:f5ac63519541 155 while (inLen--) {
Michael J. Spencer 1:f5ac63519541 156 /* add new character to buffer, increment mdi */
Michael J. Spencer 1:f5ac63519541 157 mdContext->in[mdi++] = *inBuf++;
Michael J. Spencer 1:f5ac63519541 158
Michael J. Spencer 1:f5ac63519541 159 /* transform if necessary */
Michael J. Spencer 1:f5ac63519541 160 if (mdi == 0x40) {
Michael J. Spencer 1:f5ac63519541 161 for (i = 0, ii = 0; i < 16; i++, ii += 4) {
Michael J. Spencer 1:f5ac63519541 162 in[i] = (((u32_t)mdContext->in[ii+3]) << 24) |
Michael J. Spencer 1:f5ac63519541 163 (((u32_t)mdContext->in[ii+2]) << 16) |
Michael J. Spencer 1:f5ac63519541 164 (((u32_t)mdContext->in[ii+1]) << 8) |
Michael J. Spencer 1:f5ac63519541 165 ((u32_t)mdContext->in[ii]);
Michael J. Spencer 1:f5ac63519541 166 }
Michael J. Spencer 1:f5ac63519541 167 Transform (mdContext->buf, in);
Michael J. Spencer 1:f5ac63519541 168 mdi = 0;
Michael J. Spencer 1:f5ac63519541 169 }
Michael J. Spencer 1:f5ac63519541 170 }
Michael J. Spencer 1:f5ac63519541 171 }
Michael J. Spencer 1:f5ac63519541 172
Michael J. Spencer 1:f5ac63519541 173 /* The routine MD5Final terminates the message-digest computation and
Michael J. Spencer 1:f5ac63519541 174 ends with the desired message digest in mdContext->digest[0...15].
Michael J. Spencer 1:f5ac63519541 175 */
Michael J. Spencer 1:f5ac63519541 176 void
Michael J. Spencer 1:f5ac63519541 177 MD5Final (unsigned char hash[], MD5_CTX *mdContext)
Michael J. Spencer 1:f5ac63519541 178 {
Michael J. Spencer 1:f5ac63519541 179 u32_t in[16];
Michael J. Spencer 1:f5ac63519541 180 int mdi;
Michael J. Spencer 1:f5ac63519541 181 unsigned int i, ii;
Michael J. Spencer 1:f5ac63519541 182 unsigned int padLen;
Michael J. Spencer 1:f5ac63519541 183
Michael J. Spencer 1:f5ac63519541 184 /* save number of bits */
Michael J. Spencer 1:f5ac63519541 185 in[14] = mdContext->i[0];
Michael J. Spencer 1:f5ac63519541 186 in[15] = mdContext->i[1];
Michael J. Spencer 1:f5ac63519541 187
Michael J. Spencer 1:f5ac63519541 188 /* compute number of bytes mod 64 */
Michael J. Spencer 1:f5ac63519541 189 mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
Michael J. Spencer 1:f5ac63519541 190
Michael J. Spencer 1:f5ac63519541 191 /* pad out to 56 mod 64 */
Michael J. Spencer 1:f5ac63519541 192 padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);
Michael J. Spencer 1:f5ac63519541 193 MD5Update (mdContext, PADDING, padLen);
Michael J. Spencer 1:f5ac63519541 194
Michael J. Spencer 1:f5ac63519541 195 /* append length in bits and transform */
Michael J. Spencer 1:f5ac63519541 196 for (i = 0, ii = 0; i < 14; i++, ii += 4) {
Michael J. Spencer 1:f5ac63519541 197 in[i] = (((u32_t)mdContext->in[ii+3]) << 24) |
Michael J. Spencer 1:f5ac63519541 198 (((u32_t)mdContext->in[ii+2]) << 16) |
Michael J. Spencer 1:f5ac63519541 199 (((u32_t)mdContext->in[ii+1]) << 8) |
Michael J. Spencer 1:f5ac63519541 200 ((u32_t)mdContext->in[ii]);
Michael J. Spencer 1:f5ac63519541 201 }
Michael J. Spencer 1:f5ac63519541 202 Transform (mdContext->buf, in);
Michael J. Spencer 1:f5ac63519541 203
Michael J. Spencer 1:f5ac63519541 204 /* store buffer in digest */
Michael J. Spencer 1:f5ac63519541 205 for (i = 0, ii = 0; i < 4; i++, ii += 4) {
Michael J. Spencer 1:f5ac63519541 206 mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF);
Michael J. Spencer 1:f5ac63519541 207 mdContext->digest[ii+1] =
Michael J. Spencer 1:f5ac63519541 208 (unsigned char)((mdContext->buf[i] >> 8) & 0xFF);
Michael J. Spencer 1:f5ac63519541 209 mdContext->digest[ii+2] =
Michael J. Spencer 1:f5ac63519541 210 (unsigned char)((mdContext->buf[i] >> 16) & 0xFF);
Michael J. Spencer 1:f5ac63519541 211 mdContext->digest[ii+3] =
Michael J. Spencer 1:f5ac63519541 212 (unsigned char)((mdContext->buf[i] >> 24) & 0xFF);
Michael J. Spencer 1:f5ac63519541 213 }
Michael J. Spencer 1:f5ac63519541 214 SMEMCPY(hash, mdContext->digest, 16);
Michael J. Spencer 1:f5ac63519541 215 }
Michael J. Spencer 1:f5ac63519541 216
Michael J. Spencer 1:f5ac63519541 217 /* Basic MD5 step. Transforms buf based on in.
Michael J. Spencer 1:f5ac63519541 218 */
Michael J. Spencer 1:f5ac63519541 219 static void
Michael J. Spencer 1:f5ac63519541 220 Transform (u32_t *buf, u32_t *in)
Michael J. Spencer 1:f5ac63519541 221 {
Michael J. Spencer 1:f5ac63519541 222 u32_t a = buf[0], b = buf[1], c = buf[2], d = buf[3];
Michael J. Spencer 1:f5ac63519541 223
Michael J. Spencer 1:f5ac63519541 224 /* Round 1 */
Michael J. Spencer 1:f5ac63519541 225 #define S11 7
Michael J. Spencer 1:f5ac63519541 226 #define S12 12
Michael J. Spencer 1:f5ac63519541 227 #define S13 17
Michael J. Spencer 1:f5ac63519541 228 #define S14 22
Michael J. Spencer 1:f5ac63519541 229 FF ( a, b, c, d, in[ 0], S11, UL(3614090360)); /* 1 */
Michael J. Spencer 1:f5ac63519541 230 FF ( d, a, b, c, in[ 1], S12, UL(3905402710)); /* 2 */
Michael J. Spencer 1:f5ac63519541 231 FF ( c, d, a, b, in[ 2], S13, UL( 606105819)); /* 3 */
Michael J. Spencer 1:f5ac63519541 232 FF ( b, c, d, a, in[ 3], S14, UL(3250441966)); /* 4 */
Michael J. Spencer 1:f5ac63519541 233 FF ( a, b, c, d, in[ 4], S11, UL(4118548399)); /* 5 */
Michael J. Spencer 1:f5ac63519541 234 FF ( d, a, b, c, in[ 5], S12, UL(1200080426)); /* 6 */
Michael J. Spencer 1:f5ac63519541 235 FF ( c, d, a, b, in[ 6], S13, UL(2821735955)); /* 7 */
Michael J. Spencer 1:f5ac63519541 236 FF ( b, c, d, a, in[ 7], S14, UL(4249261313)); /* 8 */
Michael J. Spencer 1:f5ac63519541 237 FF ( a, b, c, d, in[ 8], S11, UL(1770035416)); /* 9 */
Michael J. Spencer 1:f5ac63519541 238 FF ( d, a, b, c, in[ 9], S12, UL(2336552879)); /* 10 */
Michael J. Spencer 1:f5ac63519541 239 FF ( c, d, a, b, in[10], S13, UL(4294925233)); /* 11 */
Michael J. Spencer 1:f5ac63519541 240 FF ( b, c, d, a, in[11], S14, UL(2304563134)); /* 12 */
Michael J. Spencer 1:f5ac63519541 241 FF ( a, b, c, d, in[12], S11, UL(1804603682)); /* 13 */
Michael J. Spencer 1:f5ac63519541 242 FF ( d, a, b, c, in[13], S12, UL(4254626195)); /* 14 */
Michael J. Spencer 1:f5ac63519541 243 FF ( c, d, a, b, in[14], S13, UL(2792965006)); /* 15 */
Michael J. Spencer 1:f5ac63519541 244 FF ( b, c, d, a, in[15], S14, UL(1236535329)); /* 16 */
Michael J. Spencer 1:f5ac63519541 245
Michael J. Spencer 1:f5ac63519541 246 /* Round 2 */
Michael J. Spencer 1:f5ac63519541 247 #define S21 5
Michael J. Spencer 1:f5ac63519541 248 #define S22 9
Michael J. Spencer 1:f5ac63519541 249 #define S23 14
Michael J. Spencer 1:f5ac63519541 250 #define S24 20
Michael J. Spencer 1:f5ac63519541 251 GG ( a, b, c, d, in[ 1], S21, UL(4129170786)); /* 17 */
Michael J. Spencer 1:f5ac63519541 252 GG ( d, a, b, c, in[ 6], S22, UL(3225465664)); /* 18 */
Michael J. Spencer 1:f5ac63519541 253 GG ( c, d, a, b, in[11], S23, UL( 643717713)); /* 19 */
Michael J. Spencer 1:f5ac63519541 254 GG ( b, c, d, a, in[ 0], S24, UL(3921069994)); /* 20 */
Michael J. Spencer 1:f5ac63519541 255 GG ( a, b, c, d, in[ 5], S21, UL(3593408605)); /* 21 */
Michael J. Spencer 1:f5ac63519541 256 GG ( d, a, b, c, in[10], S22, UL( 38016083)); /* 22 */
Michael J. Spencer 1:f5ac63519541 257 GG ( c, d, a, b, in[15], S23, UL(3634488961)); /* 23 */
Michael J. Spencer 1:f5ac63519541 258 GG ( b, c, d, a, in[ 4], S24, UL(3889429448)); /* 24 */
Michael J. Spencer 1:f5ac63519541 259 GG ( a, b, c, d, in[ 9], S21, UL( 568446438)); /* 25 */
Michael J. Spencer 1:f5ac63519541 260 GG ( d, a, b, c, in[14], S22, UL(3275163606)); /* 26 */
Michael J. Spencer 1:f5ac63519541 261 GG ( c, d, a, b, in[ 3], S23, UL(4107603335)); /* 27 */
Michael J. Spencer 1:f5ac63519541 262 GG ( b, c, d, a, in[ 8], S24, UL(1163531501)); /* 28 */
Michael J. Spencer 1:f5ac63519541 263 GG ( a, b, c, d, in[13], S21, UL(2850285829)); /* 29 */
Michael J. Spencer 1:f5ac63519541 264 GG ( d, a, b, c, in[ 2], S22, UL(4243563512)); /* 30 */
Michael J. Spencer 1:f5ac63519541 265 GG ( c, d, a, b, in[ 7], S23, UL(1735328473)); /* 31 */
Michael J. Spencer 1:f5ac63519541 266 GG ( b, c, d, a, in[12], S24, UL(2368359562)); /* 32 */
Michael J. Spencer 1:f5ac63519541 267
Michael J. Spencer 1:f5ac63519541 268 /* Round 3 */
Michael J. Spencer 1:f5ac63519541 269 #define S31 4
Michael J. Spencer 1:f5ac63519541 270 #define S32 11
Michael J. Spencer 1:f5ac63519541 271 #define S33 16
Michael J. Spencer 1:f5ac63519541 272 #define S34 23
Michael J. Spencer 1:f5ac63519541 273 HH ( a, b, c, d, in[ 5], S31, UL(4294588738)); /* 33 */
Michael J. Spencer 1:f5ac63519541 274 HH ( d, a, b, c, in[ 8], S32, UL(2272392833)); /* 34 */
Michael J. Spencer 1:f5ac63519541 275 HH ( c, d, a, b, in[11], S33, UL(1839030562)); /* 35 */
Michael J. Spencer 1:f5ac63519541 276 HH ( b, c, d, a, in[14], S34, UL(4259657740)); /* 36 */
Michael J. Spencer 1:f5ac63519541 277 HH ( a, b, c, d, in[ 1], S31, UL(2763975236)); /* 37 */
Michael J. Spencer 1:f5ac63519541 278 HH ( d, a, b, c, in[ 4], S32, UL(1272893353)); /* 38 */
Michael J. Spencer 1:f5ac63519541 279 HH ( c, d, a, b, in[ 7], S33, UL(4139469664)); /* 39 */
Michael J. Spencer 1:f5ac63519541 280 HH ( b, c, d, a, in[10], S34, UL(3200236656)); /* 40 */
Michael J. Spencer 1:f5ac63519541 281 HH ( a, b, c, d, in[13], S31, UL( 681279174)); /* 41 */
Michael J. Spencer 1:f5ac63519541 282 HH ( d, a, b, c, in[ 0], S32, UL(3936430074)); /* 42 */
Michael J. Spencer 1:f5ac63519541 283 HH ( c, d, a, b, in[ 3], S33, UL(3572445317)); /* 43 */
Michael J. Spencer 1:f5ac63519541 284 HH ( b, c, d, a, in[ 6], S34, UL( 76029189)); /* 44 */
Michael J. Spencer 1:f5ac63519541 285 HH ( a, b, c, d, in[ 9], S31, UL(3654602809)); /* 45 */
Michael J. Spencer 1:f5ac63519541 286 HH ( d, a, b, c, in[12], S32, UL(3873151461)); /* 46 */
Michael J. Spencer 1:f5ac63519541 287 HH ( c, d, a, b, in[15], S33, UL( 530742520)); /* 47 */
Michael J. Spencer 1:f5ac63519541 288 HH ( b, c, d, a, in[ 2], S34, UL(3299628645)); /* 48 */
Michael J. Spencer 1:f5ac63519541 289
Michael J. Spencer 1:f5ac63519541 290 /* Round 4 */
Michael J. Spencer 1:f5ac63519541 291 #define S41 6
Michael J. Spencer 1:f5ac63519541 292 #define S42 10
Michael J. Spencer 1:f5ac63519541 293 #define S43 15
Michael J. Spencer 1:f5ac63519541 294 #define S44 21
Michael J. Spencer 1:f5ac63519541 295 II ( a, b, c, d, in[ 0], S41, UL(4096336452)); /* 49 */
Michael J. Spencer 1:f5ac63519541 296 II ( d, a, b, c, in[ 7], S42, UL(1126891415)); /* 50 */
Michael J. Spencer 1:f5ac63519541 297 II ( c, d, a, b, in[14], S43, UL(2878612391)); /* 51 */
Michael J. Spencer 1:f5ac63519541 298 II ( b, c, d, a, in[ 5], S44, UL(4237533241)); /* 52 */
Michael J. Spencer 1:f5ac63519541 299 II ( a, b, c, d, in[12], S41, UL(1700485571)); /* 53 */
Michael J. Spencer 1:f5ac63519541 300 II ( d, a, b, c, in[ 3], S42, UL(2399980690)); /* 54 */
Michael J. Spencer 1:f5ac63519541 301 II ( c, d, a, b, in[10], S43, UL(4293915773)); /* 55 */
Michael J. Spencer 1:f5ac63519541 302 II ( b, c, d, a, in[ 1], S44, UL(2240044497)); /* 56 */
Michael J. Spencer 1:f5ac63519541 303 II ( a, b, c, d, in[ 8], S41, UL(1873313359)); /* 57 */
Michael J. Spencer 1:f5ac63519541 304 II ( d, a, b, c, in[15], S42, UL(4264355552)); /* 58 */
Michael J. Spencer 1:f5ac63519541 305 II ( c, d, a, b, in[ 6], S43, UL(2734768916)); /* 59 */
Michael J. Spencer 1:f5ac63519541 306 II ( b, c, d, a, in[13], S44, UL(1309151649)); /* 60 */
Michael J. Spencer 1:f5ac63519541 307 II ( a, b, c, d, in[ 4], S41, UL(4149444226)); /* 61 */
Michael J. Spencer 1:f5ac63519541 308 II ( d, a, b, c, in[11], S42, UL(3174756917)); /* 62 */
Michael J. Spencer 1:f5ac63519541 309 II ( c, d, a, b, in[ 2], S43, UL( 718787259)); /* 63 */
Michael J. Spencer 1:f5ac63519541 310 II ( b, c, d, a, in[ 9], S44, UL(3951481745)); /* 64 */
Michael J. Spencer 1:f5ac63519541 311
Michael J. Spencer 1:f5ac63519541 312 buf[0] += a;
Michael J. Spencer 1:f5ac63519541 313 buf[1] += b;
Michael J. Spencer 1:f5ac63519541 314 buf[2] += c;
Michael J. Spencer 1:f5ac63519541 315 buf[3] += d;
Michael J. Spencer 1:f5ac63519541 316 }
Michael J. Spencer 1:f5ac63519541 317
Michael J. Spencer 1:f5ac63519541 318 #endif /* CHAP_SUPPORT || MD5_SUPPORT */
Michael J. Spencer 1:f5ac63519541 319
Michael J. Spencer 1:f5ac63519541 320 #endif /* PPP_SUPPORT */