Sam Walsh / F7_Ethernet_F746ZG

Forked from the DieterGraef Library

Fork of F7_Ethernet by Dieter Graef

lwip/netif/ppp/md5.c@2:fdef48f830c0, 2016-11-18 (annotated)

Committer:
EmbeddedSam
Date:
Fri Nov 18 12:48:10 2016 +0000
Revision:
2:fdef48f830c0
Parent:
0:d26c1b55cfca 
Linking MQTT together, starting with mbed-cli

Who changed what in which revision?

UserRevisionLine numberNew contents of line
DieterGraef 0:d26c1b55cfca 1 /*
DieterGraef 0:d26c1b55cfca 2 ***********************************************************************
DieterGraef 0:d26c1b55cfca 3 ** md5.c -- the source code for MD5 routines **
DieterGraef 0:d26c1b55cfca 4 ** RSA Data Security, Inc. MD5 Message-Digest Algorithm **
DieterGraef 0:d26c1b55cfca 5 ** Created: 2/17/90 RLR **
DieterGraef 0:d26c1b55cfca 6 ** Revised: 1/91 SRD,AJ,BSK,JT Reference C ver., 7/10 constant corr. **
DieterGraef 0:d26c1b55cfca 7 ***********************************************************************
DieterGraef 0:d26c1b55cfca 8 */
DieterGraef 0:d26c1b55cfca 9
DieterGraef 0:d26c1b55cfca 10 /*
DieterGraef 0:d26c1b55cfca 11 ***********************************************************************
DieterGraef 0:d26c1b55cfca 12 ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved. **
DieterGraef 0:d26c1b55cfca 13 ** **
DieterGraef 0:d26c1b55cfca 14 ** License to copy and use this software is granted provided that **
DieterGraef 0:d26c1b55cfca 15 ** it is identified as the "RSA Data Security, Inc. MD5 Message- **
DieterGraef 0:d26c1b55cfca 16 ** Digest Algorithm" in all material mentioning or referencing this **
DieterGraef 0:d26c1b55cfca 17 ** software or this function. **
DieterGraef 0:d26c1b55cfca 18 ** **
DieterGraef 0:d26c1b55cfca 19 ** License is also granted to make and use derivative works **
DieterGraef 0:d26c1b55cfca 20 ** provided that such works are identified as "derived from the RSA **
DieterGraef 0:d26c1b55cfca 21 ** Data Security, Inc. MD5 Message-Digest Algorithm" in all **
DieterGraef 0:d26c1b55cfca 22 ** material mentioning or referencing the derived work. **
DieterGraef 0:d26c1b55cfca 23 ** **
DieterGraef 0:d26c1b55cfca 24 ** RSA Data Security, Inc. makes no representations concerning **
DieterGraef 0:d26c1b55cfca 25 ** either the merchantability of this software or the suitability **
DieterGraef 0:d26c1b55cfca 26 ** of this software for any particular purpose. It is provided "as **
DieterGraef 0:d26c1b55cfca 27 ** is" without express or implied warranty of any kind. **
DieterGraef 0:d26c1b55cfca 28 ** **
DieterGraef 0:d26c1b55cfca 29 ** These notices must be retained in any copies of any part of this **
DieterGraef 0:d26c1b55cfca 30 ** documentation and/or software. **
DieterGraef 0:d26c1b55cfca 31 ***********************************************************************
DieterGraef 0:d26c1b55cfca 32 */
DieterGraef 0:d26c1b55cfca 33
DieterGraef 0:d26c1b55cfca 34 #include "lwip/opt.h"
DieterGraef 0:d26c1b55cfca 35
DieterGraef 0:d26c1b55cfca 36 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
DieterGraef 0:d26c1b55cfca 37
DieterGraef 0:d26c1b55cfca 38 #if CHAP_SUPPORT || MD5_SUPPORT
DieterGraef 0:d26c1b55cfca 39
DieterGraef 0:d26c1b55cfca 40 #include "ppp_impl.h"
DieterGraef 0:d26c1b55cfca 41 #include "pppdebug.h"
DieterGraef 0:d26c1b55cfca 42
DieterGraef 0:d26c1b55cfca 43 #include "md5.h"
DieterGraef 0:d26c1b55cfca 44
DieterGraef 0:d26c1b55cfca 45 #include <string.h>
DieterGraef 0:d26c1b55cfca 46
DieterGraef 0:d26c1b55cfca 47 /*
DieterGraef 0:d26c1b55cfca 48 ***********************************************************************
DieterGraef 0:d26c1b55cfca 49 ** Message-digest routines: **
DieterGraef 0:d26c1b55cfca 50 ** To form the message digest for a message M **
DieterGraef 0:d26c1b55cfca 51 ** (1) Initialize a context buffer mdContext using MD5Init **
DieterGraef 0:d26c1b55cfca 52 ** (2) Call MD5Update on mdContext and M **
DieterGraef 0:d26c1b55cfca 53 ** (3) Call MD5Final on mdContext **
DieterGraef 0:d26c1b55cfca 54 ** The message digest is now in mdContext->digest[0...15] **
DieterGraef 0:d26c1b55cfca 55 ***********************************************************************
DieterGraef 0:d26c1b55cfca 56 */
DieterGraef 0:d26c1b55cfca 57
DieterGraef 0:d26c1b55cfca 58 /* forward declaration */
DieterGraef 0:d26c1b55cfca 59 static void Transform (u32_t *buf, u32_t *in);
DieterGraef 0:d26c1b55cfca 60
DieterGraef 0:d26c1b55cfca 61 static unsigned char PADDING[64] = {
DieterGraef 0:d26c1b55cfca 62 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
DieterGraef 0:d26c1b55cfca 63 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
DieterGraef 0:d26c1b55cfca 64 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
DieterGraef 0:d26c1b55cfca 65 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
DieterGraef 0:d26c1b55cfca 66 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
DieterGraef 0:d26c1b55cfca 67 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
DieterGraef 0:d26c1b55cfca 68 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
DieterGraef 0:d26c1b55cfca 69 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
DieterGraef 0:d26c1b55cfca 70 };
DieterGraef 0:d26c1b55cfca 71
DieterGraef 0:d26c1b55cfca 72 /* F, G, H and I are basic MD5 functions */
DieterGraef 0:d26c1b55cfca 73 #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
DieterGraef 0:d26c1b55cfca 74 #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
DieterGraef 0:d26c1b55cfca 75 #define H(x, y, z) ((x) ^ (y) ^ (z))
DieterGraef 0:d26c1b55cfca 76 #define I(x, y, z) ((y) ^ ((x) | (~z)))
DieterGraef 0:d26c1b55cfca 77
DieterGraef 0:d26c1b55cfca 78 /* ROTATE_LEFT rotates x left n bits */
DieterGraef 0:d26c1b55cfca 79 #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
DieterGraef 0:d26c1b55cfca 80
DieterGraef 0:d26c1b55cfca 81 /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */
DieterGraef 0:d26c1b55cfca 82 /* Rotation is separate from addition to prevent recomputation */
DieterGraef 0:d26c1b55cfca 83 #define FF(a, b, c, d, x, s, ac) \
DieterGraef 0:d26c1b55cfca 84 {(a) += F ((b), (c), (d)) + (x) + (u32_t)(ac); \
DieterGraef 0:d26c1b55cfca 85 (a) = ROTATE_LEFT ((a), (s)); \
DieterGraef 0:d26c1b55cfca 86 (a) += (b); \
DieterGraef 0:d26c1b55cfca 87 }
DieterGraef 0:d26c1b55cfca 88 #define GG(a, b, c, d, x, s, ac) \
DieterGraef 0:d26c1b55cfca 89 {(a) += G ((b), (c), (d)) + (x) + (u32_t)(ac); \
DieterGraef 0:d26c1b55cfca 90 (a) = ROTATE_LEFT ((a), (s)); \
DieterGraef 0:d26c1b55cfca 91 (a) += (b); \
DieterGraef 0:d26c1b55cfca 92 }
DieterGraef 0:d26c1b55cfca 93 #define HH(a, b, c, d, x, s, ac) \
DieterGraef 0:d26c1b55cfca 94 {(a) += H ((b), (c), (d)) + (x) + (u32_t)(ac); \
DieterGraef 0:d26c1b55cfca 95 (a) = ROTATE_LEFT ((a), (s)); \
DieterGraef 0:d26c1b55cfca 96 (a) += (b); \
DieterGraef 0:d26c1b55cfca 97 }
DieterGraef 0:d26c1b55cfca 98 #define II(a, b, c, d, x, s, ac) \
DieterGraef 0:d26c1b55cfca 99 {(a) += I ((b), (c), (d)) + (x) + (u32_t)(ac); \
DieterGraef 0:d26c1b55cfca 100 (a) = ROTATE_LEFT ((a), (s)); \
DieterGraef 0:d26c1b55cfca 101 (a) += (b); \
DieterGraef 0:d26c1b55cfca 102 }
DieterGraef 0:d26c1b55cfca 103
DieterGraef 0:d26c1b55cfca 104 #ifdef __STDC__
DieterGraef 0:d26c1b55cfca 105 #define UL(x) x##UL
DieterGraef 0:d26c1b55cfca 106 #else
DieterGraef 0:d26c1b55cfca 107 #ifdef WIN32
DieterGraef 0:d26c1b55cfca 108 #define UL(x) x##UL
DieterGraef 0:d26c1b55cfca 109 #else
DieterGraef 0:d26c1b55cfca 110 #define UL(x) x
DieterGraef 0:d26c1b55cfca 111 #endif
DieterGraef 0:d26c1b55cfca 112 #endif
DieterGraef 0:d26c1b55cfca 113
DieterGraef 0:d26c1b55cfca 114 /* The routine MD5Init initializes the message-digest context
DieterGraef 0:d26c1b55cfca 115 mdContext. All fields are set to zero.
DieterGraef 0:d26c1b55cfca 116 */
DieterGraef 0:d26c1b55cfca 117 void
DieterGraef 0:d26c1b55cfca 118 MD5Init (MD5_CTX *mdContext)
DieterGraef 0:d26c1b55cfca 119 {
DieterGraef 0:d26c1b55cfca 120 mdContext->i[0] = mdContext->i[1] = (u32_t)0;
DieterGraef 0:d26c1b55cfca 121
DieterGraef 0:d26c1b55cfca 122 /* Load magic initialization constants. */
DieterGraef 0:d26c1b55cfca 123 mdContext->buf[0] = (u32_t)0x67452301UL;
DieterGraef 0:d26c1b55cfca 124 mdContext->buf[1] = (u32_t)0xefcdab89UL;
DieterGraef 0:d26c1b55cfca 125 mdContext->buf[2] = (u32_t)0x98badcfeUL;
DieterGraef 0:d26c1b55cfca 126 mdContext->buf[3] = (u32_t)0x10325476UL;
DieterGraef 0:d26c1b55cfca 127 }
DieterGraef 0:d26c1b55cfca 128
DieterGraef 0:d26c1b55cfca 129 /* The routine MD5Update updates the message-digest context to
DieterGraef 0:d26c1b55cfca 130 account for the presence of each of the characters inBuf[0..inLen-1]
DieterGraef 0:d26c1b55cfca 131 in the message whose digest is being computed.
DieterGraef 0:d26c1b55cfca 132 */
DieterGraef 0:d26c1b55cfca 133 void
DieterGraef 0:d26c1b55cfca 134 MD5Update(MD5_CTX *mdContext, unsigned char *inBuf, unsigned int inLen)
DieterGraef 0:d26c1b55cfca 135 {
DieterGraef 0:d26c1b55cfca 136 u32_t in[16];
DieterGraef 0:d26c1b55cfca 137 int mdi;
DieterGraef 0:d26c1b55cfca 138 unsigned int i, ii;
DieterGraef 0:d26c1b55cfca 139
DieterGraef 0:d26c1b55cfca 140 #if 0
DieterGraef 0:d26c1b55cfca 141 PPPDEBUG(LOG_INFO, ("MD5Update: %u:%.*H\n", inLen, LWIP_MIN(inLen, 20) * 2, inBuf));
DieterGraef 0:d26c1b55cfca 142 PPPDEBUG(LOG_INFO, ("MD5Update: %u:%s\n", inLen, inBuf));
DieterGraef 0:d26c1b55cfca 143 #endif
DieterGraef 0:d26c1b55cfca 144
DieterGraef 0:d26c1b55cfca 145 /* compute number of bytes mod 64 */
DieterGraef 0:d26c1b55cfca 146 mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
DieterGraef 0:d26c1b55cfca 147
DieterGraef 0:d26c1b55cfca 148 /* update number of bits */
DieterGraef 0:d26c1b55cfca 149 if ((mdContext->i[0] + ((u32_t)inLen << 3)) < mdContext->i[0]) {
DieterGraef 0:d26c1b55cfca 150 mdContext->i[1]++;
DieterGraef 0:d26c1b55cfca 151 }
DieterGraef 0:d26c1b55cfca 152 mdContext->i[0] += ((u32_t)inLen << 3);
DieterGraef 0:d26c1b55cfca 153 mdContext->i[1] += ((u32_t)inLen >> 29);
DieterGraef 0:d26c1b55cfca 154
DieterGraef 0:d26c1b55cfca 155 while (inLen--) {
DieterGraef 0:d26c1b55cfca 156 /* add new character to buffer, increment mdi */
DieterGraef 0:d26c1b55cfca 157 mdContext->in[mdi++] = *inBuf++;
DieterGraef 0:d26c1b55cfca 158
DieterGraef 0:d26c1b55cfca 159 /* transform if necessary */
DieterGraef 0:d26c1b55cfca 160 if (mdi == 0x40) {
DieterGraef 0:d26c1b55cfca 161 for (i = 0, ii = 0; i < 16; i++, ii += 4) {
DieterGraef 0:d26c1b55cfca 162 in[i] = (((u32_t)mdContext->in[ii+3]) << 24) |
DieterGraef 0:d26c1b55cfca 163 (((u32_t)mdContext->in[ii+2]) << 16) |
DieterGraef 0:d26c1b55cfca 164 (((u32_t)mdContext->in[ii+1]) << 8) |
DieterGraef 0:d26c1b55cfca 165 ((u32_t)mdContext->in[ii]);
DieterGraef 0:d26c1b55cfca 166 }
DieterGraef 0:d26c1b55cfca 167 Transform (mdContext->buf, in);
DieterGraef 0:d26c1b55cfca 168 mdi = 0;
DieterGraef 0:d26c1b55cfca 169 }
DieterGraef 0:d26c1b55cfca 170 }
DieterGraef 0:d26c1b55cfca 171 }
DieterGraef 0:d26c1b55cfca 172
DieterGraef 0:d26c1b55cfca 173 /* The routine MD5Final terminates the message-digest computation and
DieterGraef 0:d26c1b55cfca 174 ends with the desired message digest in mdContext->digest[0...15].
DieterGraef 0:d26c1b55cfca 175 */
DieterGraef 0:d26c1b55cfca 176 void
DieterGraef 0:d26c1b55cfca 177 MD5Final (unsigned char hash[], MD5_CTX *mdContext)
DieterGraef 0:d26c1b55cfca 178 {
DieterGraef 0:d26c1b55cfca 179 u32_t in[16];
DieterGraef 0:d26c1b55cfca 180 int mdi;
DieterGraef 0:d26c1b55cfca 181 unsigned int i, ii;
DieterGraef 0:d26c1b55cfca 182 unsigned int padLen;
DieterGraef 0:d26c1b55cfca 183
DieterGraef 0:d26c1b55cfca 184 /* save number of bits */
DieterGraef 0:d26c1b55cfca 185 in[14] = mdContext->i[0];
DieterGraef 0:d26c1b55cfca 186 in[15] = mdContext->i[1];
DieterGraef 0:d26c1b55cfca 187
DieterGraef 0:d26c1b55cfca 188 /* compute number of bytes mod 64 */
DieterGraef 0:d26c1b55cfca 189 mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
DieterGraef 0:d26c1b55cfca 190
DieterGraef 0:d26c1b55cfca 191 /* pad out to 56 mod 64 */
DieterGraef 0:d26c1b55cfca 192 padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);
DieterGraef 0:d26c1b55cfca 193 MD5Update (mdContext, PADDING, padLen);
DieterGraef 0:d26c1b55cfca 194
DieterGraef 0:d26c1b55cfca 195 /* append length in bits and transform */
DieterGraef 0:d26c1b55cfca 196 for (i = 0, ii = 0; i < 14; i++, ii += 4) {
DieterGraef 0:d26c1b55cfca 197 in[i] = (((u32_t)mdContext->in[ii+3]) << 24) |
DieterGraef 0:d26c1b55cfca 198 (((u32_t)mdContext->in[ii+2]) << 16) |
DieterGraef 0:d26c1b55cfca 199 (((u32_t)mdContext->in[ii+1]) << 8) |
DieterGraef 0:d26c1b55cfca 200 ((u32_t)mdContext->in[ii]);
DieterGraef 0:d26c1b55cfca 201 }
DieterGraef 0:d26c1b55cfca 202 Transform (mdContext->buf, in);
DieterGraef 0:d26c1b55cfca 203
DieterGraef 0:d26c1b55cfca 204 /* store buffer in digest */
DieterGraef 0:d26c1b55cfca 205 for (i = 0, ii = 0; i < 4; i++, ii += 4) {
DieterGraef 0:d26c1b55cfca 206 mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF);
DieterGraef 0:d26c1b55cfca 207 mdContext->digest[ii+1] =
DieterGraef 0:d26c1b55cfca 208 (unsigned char)((mdContext->buf[i] >> 8) & 0xFF);
DieterGraef 0:d26c1b55cfca 209 mdContext->digest[ii+2] =
DieterGraef 0:d26c1b55cfca 210 (unsigned char)((mdContext->buf[i] >> 16) & 0xFF);
DieterGraef 0:d26c1b55cfca 211 mdContext->digest[ii+3] =
DieterGraef 0:d26c1b55cfca 212 (unsigned char)((mdContext->buf[i] >> 24) & 0xFF);
DieterGraef 0:d26c1b55cfca 213 }
DieterGraef 0:d26c1b55cfca 214 SMEMCPY(hash, mdContext->digest, 16);
DieterGraef 0:d26c1b55cfca 215 }
DieterGraef 0:d26c1b55cfca 216
DieterGraef 0:d26c1b55cfca 217 /* Basic MD5 step. Transforms buf based on in.
DieterGraef 0:d26c1b55cfca 218 */
DieterGraef 0:d26c1b55cfca 219 static void
DieterGraef 0:d26c1b55cfca 220 Transform (u32_t *buf, u32_t *in)
DieterGraef 0:d26c1b55cfca 221 {
DieterGraef 0:d26c1b55cfca 222 u32_t a = buf[0], b = buf[1], c = buf[2], d = buf[3];
DieterGraef 0:d26c1b55cfca 223
DieterGraef 0:d26c1b55cfca 224 /* Round 1 */
DieterGraef 0:d26c1b55cfca 225 #define S11 7
DieterGraef 0:d26c1b55cfca 226 #define S12 12
DieterGraef 0:d26c1b55cfca 227 #define S13 17
DieterGraef 0:d26c1b55cfca 228 #define S14 22
DieterGraef 0:d26c1b55cfca 229 FF ( a, b, c, d, in[ 0], S11, UL(3614090360)); /* 1 */
DieterGraef 0:d26c1b55cfca 230 FF ( d, a, b, c, in[ 1], S12, UL(3905402710)); /* 2 */
DieterGraef 0:d26c1b55cfca 231 FF ( c, d, a, b, in[ 2], S13, UL( 606105819)); /* 3 */
DieterGraef 0:d26c1b55cfca 232 FF ( b, c, d, a, in[ 3], S14, UL(3250441966)); /* 4 */
DieterGraef 0:d26c1b55cfca 233 FF ( a, b, c, d, in[ 4], S11, UL(4118548399)); /* 5 */
DieterGraef 0:d26c1b55cfca 234 FF ( d, a, b, c, in[ 5], S12, UL(1200080426)); /* 6 */
DieterGraef 0:d26c1b55cfca 235 FF ( c, d, a, b, in[ 6], S13, UL(2821735955)); /* 7 */
DieterGraef 0:d26c1b55cfca 236 FF ( b, c, d, a, in[ 7], S14, UL(4249261313)); /* 8 */
DieterGraef 0:d26c1b55cfca 237 FF ( a, b, c, d, in[ 8], S11, UL(1770035416)); /* 9 */
DieterGraef 0:d26c1b55cfca 238 FF ( d, a, b, c, in[ 9], S12, UL(2336552879)); /* 10 */
DieterGraef 0:d26c1b55cfca 239 FF ( c, d, a, b, in[10], S13, UL(4294925233)); /* 11 */
DieterGraef 0:d26c1b55cfca 240 FF ( b, c, d, a, in[11], S14, UL(2304563134)); /* 12 */
DieterGraef 0:d26c1b55cfca 241 FF ( a, b, c, d, in[12], S11, UL(1804603682)); /* 13 */
DieterGraef 0:d26c1b55cfca 242 FF ( d, a, b, c, in[13], S12, UL(4254626195)); /* 14 */
DieterGraef 0:d26c1b55cfca 243 FF ( c, d, a, b, in[14], S13, UL(2792965006)); /* 15 */
DieterGraef 0:d26c1b55cfca 244 FF ( b, c, d, a, in[15], S14, UL(1236535329)); /* 16 */
DieterGraef 0:d26c1b55cfca 245
DieterGraef 0:d26c1b55cfca 246 /* Round 2 */
DieterGraef 0:d26c1b55cfca 247 #define S21 5
DieterGraef 0:d26c1b55cfca 248 #define S22 9
DieterGraef 0:d26c1b55cfca 249 #define S23 14
DieterGraef 0:d26c1b55cfca 250 #define S24 20
DieterGraef 0:d26c1b55cfca 251 GG ( a, b, c, d, in[ 1], S21, UL(4129170786)); /* 17 */
DieterGraef 0:d26c1b55cfca 252 GG ( d, a, b, c, in[ 6], S22, UL(3225465664)); /* 18 */
DieterGraef 0:d26c1b55cfca 253 GG ( c, d, a, b, in[11], S23, UL( 643717713)); /* 19 */
DieterGraef 0:d26c1b55cfca 254 GG ( b, c, d, a, in[ 0], S24, UL(3921069994)); /* 20 */
DieterGraef 0:d26c1b55cfca 255 GG ( a, b, c, d, in[ 5], S21, UL(3593408605)); /* 21 */
DieterGraef 0:d26c1b55cfca 256 GG ( d, a, b, c, in[10], S22, UL( 38016083)); /* 22 */
DieterGraef 0:d26c1b55cfca 257 GG ( c, d, a, b, in[15], S23, UL(3634488961)); /* 23 */
DieterGraef 0:d26c1b55cfca 258 GG ( b, c, d, a, in[ 4], S24, UL(3889429448)); /* 24 */
DieterGraef 0:d26c1b55cfca 259 GG ( a, b, c, d, in[ 9], S21, UL( 568446438)); /* 25 */
DieterGraef 0:d26c1b55cfca 260 GG ( d, a, b, c, in[14], S22, UL(3275163606)); /* 26 */
DieterGraef 0:d26c1b55cfca 261 GG ( c, d, a, b, in[ 3], S23, UL(4107603335)); /* 27 */
DieterGraef 0:d26c1b55cfca 262 GG ( b, c, d, a, in[ 8], S24, UL(1163531501)); /* 28 */
DieterGraef 0:d26c1b55cfca 263 GG ( a, b, c, d, in[13], S21, UL(2850285829)); /* 29 */
DieterGraef 0:d26c1b55cfca 264 GG ( d, a, b, c, in[ 2], S22, UL(4243563512)); /* 30 */
DieterGraef 0:d26c1b55cfca 265 GG ( c, d, a, b, in[ 7], S23, UL(1735328473)); /* 31 */
DieterGraef 0:d26c1b55cfca 266 GG ( b, c, d, a, in[12], S24, UL(2368359562)); /* 32 */
DieterGraef 0:d26c1b55cfca 267
DieterGraef 0:d26c1b55cfca 268 /* Round 3 */
DieterGraef 0:d26c1b55cfca 269 #define S31 4
DieterGraef 0:d26c1b55cfca 270 #define S32 11
DieterGraef 0:d26c1b55cfca 271 #define S33 16
DieterGraef 0:d26c1b55cfca 272 #define S34 23
DieterGraef 0:d26c1b55cfca 273 HH ( a, b, c, d, in[ 5], S31, UL(4294588738)); /* 33 */
DieterGraef 0:d26c1b55cfca 274 HH ( d, a, b, c, in[ 8], S32, UL(2272392833)); /* 34 */
DieterGraef 0:d26c1b55cfca 275 HH ( c, d, a, b, in[11], S33, UL(1839030562)); /* 35 */
DieterGraef 0:d26c1b55cfca 276 HH ( b, c, d, a, in[14], S34, UL(4259657740)); /* 36 */
DieterGraef 0:d26c1b55cfca 277 HH ( a, b, c, d, in[ 1], S31, UL(2763975236)); /* 37 */
DieterGraef 0:d26c1b55cfca 278 HH ( d, a, b, c, in[ 4], S32, UL(1272893353)); /* 38 */
DieterGraef 0:d26c1b55cfca 279 HH ( c, d, a, b, in[ 7], S33, UL(4139469664)); /* 39 */
DieterGraef 0:d26c1b55cfca 280 HH ( b, c, d, a, in[10], S34, UL(3200236656)); /* 40 */
DieterGraef 0:d26c1b55cfca 281 HH ( a, b, c, d, in[13], S31, UL( 681279174)); /* 41 */
DieterGraef 0:d26c1b55cfca 282 HH ( d, a, b, c, in[ 0], S32, UL(3936430074)); /* 42 */
DieterGraef 0:d26c1b55cfca 283 HH ( c, d, a, b, in[ 3], S33, UL(3572445317)); /* 43 */
DieterGraef 0:d26c1b55cfca 284 HH ( b, c, d, a, in[ 6], S34, UL( 76029189)); /* 44 */
DieterGraef 0:d26c1b55cfca 285 HH ( a, b, c, d, in[ 9], S31, UL(3654602809)); /* 45 */
DieterGraef 0:d26c1b55cfca 286 HH ( d, a, b, c, in[12], S32, UL(3873151461)); /* 46 */
DieterGraef 0:d26c1b55cfca 287 HH ( c, d, a, b, in[15], S33, UL( 530742520)); /* 47 */
DieterGraef 0:d26c1b55cfca 288 HH ( b, c, d, a, in[ 2], S34, UL(3299628645)); /* 48 */
DieterGraef 0:d26c1b55cfca 289
DieterGraef 0:d26c1b55cfca 290 /* Round 4 */
DieterGraef 0:d26c1b55cfca 291 #define S41 6
DieterGraef 0:d26c1b55cfca 292 #define S42 10
DieterGraef 0:d26c1b55cfca 293 #define S43 15
DieterGraef 0:d26c1b55cfca 294 #define S44 21
DieterGraef 0:d26c1b55cfca 295 II ( a, b, c, d, in[ 0], S41, UL(4096336452)); /* 49 */
DieterGraef 0:d26c1b55cfca 296 II ( d, a, b, c, in[ 7], S42, UL(1126891415)); /* 50 */
DieterGraef 0:d26c1b55cfca 297 II ( c, d, a, b, in[14], S43, UL(2878612391)); /* 51 */
DieterGraef 0:d26c1b55cfca 298 II ( b, c, d, a, in[ 5], S44, UL(4237533241)); /* 52 */
DieterGraef 0:d26c1b55cfca 299 II ( a, b, c, d, in[12], S41, UL(1700485571)); /* 53 */
DieterGraef 0:d26c1b55cfca 300 II ( d, a, b, c, in[ 3], S42, UL(2399980690)); /* 54 */
DieterGraef 0:d26c1b55cfca 301 II ( c, d, a, b, in[10], S43, UL(4293915773)); /* 55 */
DieterGraef 0:d26c1b55cfca 302 II ( b, c, d, a, in[ 1], S44, UL(2240044497)); /* 56 */
DieterGraef 0:d26c1b55cfca 303 II ( a, b, c, d, in[ 8], S41, UL(1873313359)); /* 57 */
DieterGraef 0:d26c1b55cfca 304 II ( d, a, b, c, in[15], S42, UL(4264355552)); /* 58 */
DieterGraef 0:d26c1b55cfca 305 II ( c, d, a, b, in[ 6], S43, UL(2734768916)); /* 59 */
DieterGraef 0:d26c1b55cfca 306 II ( b, c, d, a, in[13], S44, UL(1309151649)); /* 60 */
DieterGraef 0:d26c1b55cfca 307 II ( a, b, c, d, in[ 4], S41, UL(4149444226)); /* 61 */
DieterGraef 0:d26c1b55cfca 308 II ( d, a, b, c, in[11], S42, UL(3174756917)); /* 62 */
DieterGraef 0:d26c1b55cfca 309 II ( c, d, a, b, in[ 2], S43, UL( 718787259)); /* 63 */
DieterGraef 0:d26c1b55cfca 310 II ( b, c, d, a, in[ 9], S44, UL(3951481745)); /* 64 */
DieterGraef 0:d26c1b55cfca 311
DieterGraef 0:d26c1b55cfca 312 buf[0] += a;
DieterGraef 0:d26c1b55cfca 313 buf[1] += b;
DieterGraef 0:d26c1b55cfca 314 buf[2] += c;
DieterGraef 0:d26c1b55cfca 315 buf[3] += d;
DieterGraef 0:d26c1b55cfca 316 }
DieterGraef 0:d26c1b55cfca 317
DieterGraef 0:d26c1b55cfca 318 #endif /* CHAP_SUPPORT || MD5_SUPPORT */
DieterGraef 0:d26c1b55cfca 319
DieterGraef 0:d26c1b55cfca 320 #endif /* PPP_SUPPORT */