Adam Green / Mbed 2 deprecated WeatherStation

Web server based weather station using Sparkfun Weather Meters.

Dependencies:   FatFileSystem mbed WeatherMeters SDFileSystem

NetStack/lwip/netif/ppp/chpms.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 /*** WARNING - THIS CODE HAS NOT BEEN FINISHED! ***/
AdamGreen 0:616601bde9fb 2 /*** The original PPPD code is written in a way to require either the UNIX DES
AdamGreen 0:616601bde9fb 3 encryption functions encrypt(3) and setkey(3) or the DES library libdes.
AdamGreen 0:616601bde9fb 4 Since both is not included in lwIP, MSCHAP currently does not work! */
AdamGreen 0:616601bde9fb 5 /*****************************************************************************
AdamGreen 0:616601bde9fb 6 * chpms.c - Network MicroSoft Challenge Handshake Authentication Protocol program file.
AdamGreen 0:616601bde9fb 7 *
AdamGreen 0:616601bde9fb 8 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
AdamGreen 0:616601bde9fb 9 * Copyright (c) 1997 by Global Election Systems Inc. All rights reserved.
AdamGreen 0:616601bde9fb 10 *
AdamGreen 0:616601bde9fb 11 * The authors hereby grant permission to use, copy, modify, distribute,
AdamGreen 0:616601bde9fb 12 * and license this software and its documentation for any purpose, provided
AdamGreen 0:616601bde9fb 13 * that existing copyright notices are retained in all copies and that this
AdamGreen 0:616601bde9fb 14 * notice and the following disclaimer are included verbatim in any
AdamGreen 0:616601bde9fb 15 * distributions. No written agreement, license, or royalty fee is required
AdamGreen 0:616601bde9fb 16 * for any of the authorized uses.
AdamGreen 0:616601bde9fb 17 *
AdamGreen 0:616601bde9fb 18 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
AdamGreen 0:616601bde9fb 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
AdamGreen 0:616601bde9fb 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
AdamGreen 0:616601bde9fb 21 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
AdamGreen 0:616601bde9fb 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
AdamGreen 0:616601bde9fb 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
AdamGreen 0:616601bde9fb 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
AdamGreen 0:616601bde9fb 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
AdamGreen 0:616601bde9fb 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
AdamGreen 0:616601bde9fb 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AdamGreen 0:616601bde9fb 28 *
AdamGreen 0:616601bde9fb 29 ******************************************************************************
AdamGreen 0:616601bde9fb 30 * REVISION HISTORY
AdamGreen 0:616601bde9fb 31 *
AdamGreen 0:616601bde9fb 32 * 03-01-01 Marc Boucher <marc@mbsi.ca>
AdamGreen 0:616601bde9fb 33 * Ported to lwIP.
AdamGreen 0:616601bde9fb 34 * 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
AdamGreen 0:616601bde9fb 35 * Original based on BSD chap_ms.c.
AdamGreen 0:616601bde9fb 36 *****************************************************************************/
AdamGreen 0:616601bde9fb 37 /*
AdamGreen 0:616601bde9fb 38 * chap_ms.c - Microsoft MS-CHAP compatible implementation.
AdamGreen 0:616601bde9fb 39 *
AdamGreen 0:616601bde9fb 40 * Copyright (c) 1995 Eric Rosenquist, Strata Software Limited.
AdamGreen 0:616601bde9fb 41 * http://www.strataware.com/
AdamGreen 0:616601bde9fb 42 *
AdamGreen 0:616601bde9fb 43 * All rights reserved.
AdamGreen 0:616601bde9fb 44 *
AdamGreen 0:616601bde9fb 45 * Redistribution and use in source and binary forms are permitted
AdamGreen 0:616601bde9fb 46 * provided that the above copyright notice and this paragraph are
AdamGreen 0:616601bde9fb 47 * duplicated in all such forms and that any documentation,
AdamGreen 0:616601bde9fb 48 * advertising materials, and other materials related to such
AdamGreen 0:616601bde9fb 49 * distribution and use acknowledge that the software was developed
AdamGreen 0:616601bde9fb 50 * by Eric Rosenquist. The name of the author may not be used to
AdamGreen 0:616601bde9fb 51 * endorse or promote products derived from this software without
AdamGreen 0:616601bde9fb 52 * specific prior written permission.
AdamGreen 0:616601bde9fb 53 *
AdamGreen 0:616601bde9fb 54 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
AdamGreen 0:616601bde9fb 55 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
AdamGreen 0:616601bde9fb 56 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
AdamGreen 0:616601bde9fb 57 */
AdamGreen 0:616601bde9fb 58
AdamGreen 0:616601bde9fb 59 /*
AdamGreen 0:616601bde9fb 60 * Modifications by Lauri Pesonen / lpesonen@clinet.fi, april 1997
AdamGreen 0:616601bde9fb 61 *
AdamGreen 0:616601bde9fb 62 * Implemented LANManager type password response to MS-CHAP challenges.
AdamGreen 0:616601bde9fb 63 * Now pppd provides both NT style and LANMan style blocks, and the
AdamGreen 0:616601bde9fb 64 * prefered is set by option "ms-lanman". Default is to use NT.
AdamGreen 0:616601bde9fb 65 * The hash text (StdText) was taken from Win95 RASAPI32.DLL.
AdamGreen 0:616601bde9fb 66 *
AdamGreen 0:616601bde9fb 67 * You should also use DOMAIN\\USERNAME as described in README.MSCHAP80
AdamGreen 0:616601bde9fb 68 */
AdamGreen 0:616601bde9fb 69
AdamGreen 0:616601bde9fb 70 #define USE_CRYPT
AdamGreen 0:616601bde9fb 71
AdamGreen 0:616601bde9fb 72 #include "lwip/opt.h"
AdamGreen 0:616601bde9fb 73
AdamGreen 0:616601bde9fb 74 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
AdamGreen 0:616601bde9fb 75
AdamGreen 0:616601bde9fb 76 #if MSCHAP_SUPPORT /* don't build if not configured for use in lwipopts.h */
AdamGreen 0:616601bde9fb 77
AdamGreen 0:616601bde9fb 78 #include "ppp.h"
AdamGreen 0:616601bde9fb 79 #include "pppdebug.h"
AdamGreen 0:616601bde9fb 80
AdamGreen 0:616601bde9fb 81 #include "md4.h"
AdamGreen 0:616601bde9fb 82 #ifndef USE_CRYPT
AdamGreen 0:616601bde9fb 83 #include "des.h"
AdamGreen 0:616601bde9fb 84 #endif
AdamGreen 0:616601bde9fb 85 #include "chap.h"
AdamGreen 0:616601bde9fb 86 #include "chpms.h"
AdamGreen 0:616601bde9fb 87
AdamGreen 0:616601bde9fb 88 #include <string.h>
AdamGreen 0:616601bde9fb 89
AdamGreen 0:616601bde9fb 90
AdamGreen 0:616601bde9fb 91 /*************************/
AdamGreen 0:616601bde9fb 92 /*** LOCAL DEFINITIONS ***/
AdamGreen 0:616601bde9fb 93 /*************************/
AdamGreen 0:616601bde9fb 94
AdamGreen 0:616601bde9fb 95
AdamGreen 0:616601bde9fb 96 /************************/
AdamGreen 0:616601bde9fb 97 /*** LOCAL DATA TYPES ***/
AdamGreen 0:616601bde9fb 98 /************************/
AdamGreen 0:616601bde9fb 99 typedef struct {
AdamGreen 0:616601bde9fb 100 u_char LANManResp[24];
AdamGreen 0:616601bde9fb 101 u_char NTResp[24];
AdamGreen 0:616601bde9fb 102 u_char UseNT; /* If 1, ignore the LANMan response field */
AdamGreen 0:616601bde9fb 103 } MS_ChapResponse;
AdamGreen 0:616601bde9fb 104 /* We use MS_CHAP_RESPONSE_LEN, rather than sizeof(MS_ChapResponse),
AdamGreen 0:616601bde9fb 105 in case this struct gets padded. */
AdamGreen 0:616601bde9fb 106
AdamGreen 0:616601bde9fb 107
AdamGreen 0:616601bde9fb 108
AdamGreen 0:616601bde9fb 109 /***********************************/
AdamGreen 0:616601bde9fb 110 /*** LOCAL FUNCTION DECLARATIONS ***/
AdamGreen 0:616601bde9fb 111 /***********************************/
AdamGreen 0:616601bde9fb 112
AdamGreen 0:616601bde9fb 113 /* XXX Don't know what to do with these. */
AdamGreen 0:616601bde9fb 114 extern void setkey(const char *);
AdamGreen 0:616601bde9fb 115 extern void encrypt(char *, int);
AdamGreen 0:616601bde9fb 116
AdamGreen 0:616601bde9fb 117 static void DesEncrypt (u_char *, u_char *, u_char *);
AdamGreen 0:616601bde9fb 118 static void MakeKey (u_char *, u_char *);
AdamGreen 0:616601bde9fb 119
AdamGreen 0:616601bde9fb 120 #ifdef USE_CRYPT
AdamGreen 0:616601bde9fb 121 static void Expand (u_char *, u_char *);
AdamGreen 0:616601bde9fb 122 static void Collapse (u_char *, u_char *);
AdamGreen 0:616601bde9fb 123 #endif
AdamGreen 0:616601bde9fb 124
AdamGreen 0:616601bde9fb 125 static void ChallengeResponse(
AdamGreen 0:616601bde9fb 126 u_char *challenge, /* IN 8 octets */
AdamGreen 0:616601bde9fb 127 u_char *pwHash, /* IN 16 octets */
AdamGreen 0:616601bde9fb 128 u_char *response /* OUT 24 octets */
AdamGreen 0:616601bde9fb 129 );
AdamGreen 0:616601bde9fb 130 static void ChapMS_NT(
AdamGreen 0:616601bde9fb 131 char *rchallenge,
AdamGreen 0:616601bde9fb 132 int rchallenge_len,
AdamGreen 0:616601bde9fb 133 char *secret,
AdamGreen 0:616601bde9fb 134 int secret_len,
AdamGreen 0:616601bde9fb 135 MS_ChapResponse *response
AdamGreen 0:616601bde9fb 136 );
AdamGreen 0:616601bde9fb 137 static u_char Get7Bits(
AdamGreen 0:616601bde9fb 138 u_char *input,
AdamGreen 0:616601bde9fb 139 int startBit
AdamGreen 0:616601bde9fb 140 );
AdamGreen 0:616601bde9fb 141
AdamGreen 0:616601bde9fb 142 static void
AdamGreen 0:616601bde9fb 143 ChallengeResponse( u_char *challenge, /* IN 8 octets */
AdamGreen 0:616601bde9fb 144 u_char *pwHash, /* IN 16 octets */
AdamGreen 0:616601bde9fb 145 u_char *response /* OUT 24 octets */)
AdamGreen 0:616601bde9fb 146 {
AdamGreen 0:616601bde9fb 147 u_char ZPasswordHash[21];
AdamGreen 0:616601bde9fb 148
AdamGreen 0:616601bde9fb 149 BZERO(ZPasswordHash, sizeof(ZPasswordHash));
AdamGreen 0:616601bde9fb 150 BCOPY(pwHash, ZPasswordHash, 16);
AdamGreen 0:616601bde9fb 151
AdamGreen 0:616601bde9fb 152 #if 0
AdamGreen 0:616601bde9fb 153 log_packet(ZPasswordHash, sizeof(ZPasswordHash), "ChallengeResponse - ZPasswordHash", LOG_DEBUG);
AdamGreen 0:616601bde9fb 154 #endif
AdamGreen 0:616601bde9fb 155
AdamGreen 0:616601bde9fb 156 DesEncrypt(challenge, ZPasswordHash + 0, response + 0);
AdamGreen 0:616601bde9fb 157 DesEncrypt(challenge, ZPasswordHash + 7, response + 8);
AdamGreen 0:616601bde9fb 158 DesEncrypt(challenge, ZPasswordHash + 14, response + 16);
AdamGreen 0:616601bde9fb 159
AdamGreen 0:616601bde9fb 160 #if 0
AdamGreen 0:616601bde9fb 161 log_packet(response, 24, "ChallengeResponse - response", LOG_DEBUG);
AdamGreen 0:616601bde9fb 162 #endif
AdamGreen 0:616601bde9fb 163 }
AdamGreen 0:616601bde9fb 164
AdamGreen 0:616601bde9fb 165
AdamGreen 0:616601bde9fb 166 #ifdef USE_CRYPT
AdamGreen 0:616601bde9fb 167 static void
AdamGreen 0:616601bde9fb 168 DesEncrypt( u_char *clear, /* IN 8 octets */
AdamGreen 0:616601bde9fb 169 u_char *key, /* IN 7 octets */
AdamGreen 0:616601bde9fb 170 u_char *cipher /* OUT 8 octets */)
AdamGreen 0:616601bde9fb 171 {
AdamGreen 0:616601bde9fb 172 u_char des_key[8];
AdamGreen 0:616601bde9fb 173 u_char crypt_key[66];
AdamGreen 0:616601bde9fb 174 u_char des_input[66];
AdamGreen 0:616601bde9fb 175
AdamGreen 0:616601bde9fb 176 MakeKey(key, des_key);
AdamGreen 0:616601bde9fb 177
AdamGreen 0:616601bde9fb 178 Expand(des_key, crypt_key);
AdamGreen 0:616601bde9fb 179 setkey((char*)crypt_key);
AdamGreen 0:616601bde9fb 180
AdamGreen 0:616601bde9fb 181 #if 0
AdamGreen 0:616601bde9fb 182 CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X\n",
AdamGreen 0:616601bde9fb 183 clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7]));
AdamGreen 0:616601bde9fb 184 #endif
AdamGreen 0:616601bde9fb 185
AdamGreen 0:616601bde9fb 186 Expand(clear, des_input);
AdamGreen 0:616601bde9fb 187 encrypt((char*)des_input, 0);
AdamGreen 0:616601bde9fb 188 Collapse(des_input, cipher);
AdamGreen 0:616601bde9fb 189
AdamGreen 0:616601bde9fb 190 #if 0
AdamGreen 0:616601bde9fb 191 CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
AdamGreen 0:616601bde9fb 192 cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7]));
AdamGreen 0:616601bde9fb 193 #endif
AdamGreen 0:616601bde9fb 194 }
AdamGreen 0:616601bde9fb 195
AdamGreen 0:616601bde9fb 196 #else /* USE_CRYPT */
AdamGreen 0:616601bde9fb 197
AdamGreen 0:616601bde9fb 198 static void
AdamGreen 0:616601bde9fb 199 DesEncrypt( u_char *clear, /* IN 8 octets */
AdamGreen 0:616601bde9fb 200 u_char *key, /* IN 7 octets */
AdamGreen 0:616601bde9fb 201 u_char *cipher /* OUT 8 octets */)
AdamGreen 0:616601bde9fb 202 {
AdamGreen 0:616601bde9fb 203 des_cblock des_key;
AdamGreen 0:616601bde9fb 204 des_key_schedule key_schedule;
AdamGreen 0:616601bde9fb 205
AdamGreen 0:616601bde9fb 206 MakeKey(key, des_key);
AdamGreen 0:616601bde9fb 207
AdamGreen 0:616601bde9fb 208 des_set_key(&des_key, key_schedule);
AdamGreen 0:616601bde9fb 209
AdamGreen 0:616601bde9fb 210 #if 0
AdamGreen 0:616601bde9fb 211 CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X\n",
AdamGreen 0:616601bde9fb 212 clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7]));
AdamGreen 0:616601bde9fb 213 #endif
AdamGreen 0:616601bde9fb 214
AdamGreen 0:616601bde9fb 215 des_ecb_encrypt((des_cblock *)clear, (des_cblock *)cipher, key_schedule, 1);
AdamGreen 0:616601bde9fb 216
AdamGreen 0:616601bde9fb 217 #if 0
AdamGreen 0:616601bde9fb 218 CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
AdamGreen 0:616601bde9fb 219 cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7]));
AdamGreen 0:616601bde9fb 220 #endif
AdamGreen 0:616601bde9fb 221 }
AdamGreen 0:616601bde9fb 222
AdamGreen 0:616601bde9fb 223 #endif /* USE_CRYPT */
AdamGreen 0:616601bde9fb 224
AdamGreen 0:616601bde9fb 225
AdamGreen 0:616601bde9fb 226 static u_char
AdamGreen 0:616601bde9fb 227 Get7Bits( u_char *input, int startBit)
AdamGreen 0:616601bde9fb 228 {
AdamGreen 0:616601bde9fb 229 register unsigned int word;
AdamGreen 0:616601bde9fb 230
AdamGreen 0:616601bde9fb 231 word = (unsigned)input[startBit / 8] << 8;
AdamGreen 0:616601bde9fb 232 word |= (unsigned)input[startBit / 8 + 1];
AdamGreen 0:616601bde9fb 233
AdamGreen 0:616601bde9fb 234 word >>= 15 - (startBit % 8 + 7);
AdamGreen 0:616601bde9fb 235
AdamGreen 0:616601bde9fb 236 return word & 0xFE;
AdamGreen 0:616601bde9fb 237 }
AdamGreen 0:616601bde9fb 238
AdamGreen 0:616601bde9fb 239 #ifdef USE_CRYPT
AdamGreen 0:616601bde9fb 240
AdamGreen 0:616601bde9fb 241 /* in == 8-byte string (expanded version of the 56-bit key)
AdamGreen 0:616601bde9fb 242 * out == 64-byte string where each byte is either 1 or 0
AdamGreen 0:616601bde9fb 243 * Note that the low-order "bit" is always ignored by by setkey()
AdamGreen 0:616601bde9fb 244 */
AdamGreen 0:616601bde9fb 245 static void
AdamGreen 0:616601bde9fb 246 Expand(u_char *in, u_char *out)
AdamGreen 0:616601bde9fb 247 {
AdamGreen 0:616601bde9fb 248 int j, c;
AdamGreen 0:616601bde9fb 249 int i;
AdamGreen 0:616601bde9fb 250
AdamGreen 0:616601bde9fb 251 for(i = 0; i < 64; in++){
AdamGreen 0:616601bde9fb 252 c = *in;
AdamGreen 0:616601bde9fb 253 for(j = 7; j >= 0; j--) {
AdamGreen 0:616601bde9fb 254 *out++ = (c >> j) & 01;
AdamGreen 0:616601bde9fb 255 }
AdamGreen 0:616601bde9fb 256 i += 8;
AdamGreen 0:616601bde9fb 257 }
AdamGreen 0:616601bde9fb 258 }
AdamGreen 0:616601bde9fb 259
AdamGreen 0:616601bde9fb 260 /* The inverse of Expand
AdamGreen 0:616601bde9fb 261 */
AdamGreen 0:616601bde9fb 262 static void
AdamGreen 0:616601bde9fb 263 Collapse(u_char *in, u_char *out)
AdamGreen 0:616601bde9fb 264 {
AdamGreen 0:616601bde9fb 265 int j;
AdamGreen 0:616601bde9fb 266 int i;
AdamGreen 0:616601bde9fb 267 unsigned int c;
AdamGreen 0:616601bde9fb 268
AdamGreen 0:616601bde9fb 269 for (i = 0; i < 64; i += 8, out++) {
AdamGreen 0:616601bde9fb 270 c = 0;
AdamGreen 0:616601bde9fb 271 for (j = 7; j >= 0; j--, in++) {
AdamGreen 0:616601bde9fb 272 c |= *in << j;
AdamGreen 0:616601bde9fb 273 }
AdamGreen 0:616601bde9fb 274 *out = c & 0xff;
AdamGreen 0:616601bde9fb 275 }
AdamGreen 0:616601bde9fb 276 }
AdamGreen 0:616601bde9fb 277 #endif
AdamGreen 0:616601bde9fb 278
AdamGreen 0:616601bde9fb 279 static void
AdamGreen 0:616601bde9fb 280 MakeKey( u_char *key, /* IN 56 bit DES key missing parity bits */
AdamGreen 0:616601bde9fb 281 u_char *des_key /* OUT 64 bit DES key with parity bits added */)
AdamGreen 0:616601bde9fb 282 {
AdamGreen 0:616601bde9fb 283 des_key[0] = Get7Bits(key, 0);
AdamGreen 0:616601bde9fb 284 des_key[1] = Get7Bits(key, 7);
AdamGreen 0:616601bde9fb 285 des_key[2] = Get7Bits(key, 14);
AdamGreen 0:616601bde9fb 286 des_key[3] = Get7Bits(key, 21);
AdamGreen 0:616601bde9fb 287 des_key[4] = Get7Bits(key, 28);
AdamGreen 0:616601bde9fb 288 des_key[5] = Get7Bits(key, 35);
AdamGreen 0:616601bde9fb 289 des_key[6] = Get7Bits(key, 42);
AdamGreen 0:616601bde9fb 290 des_key[7] = Get7Bits(key, 49);
AdamGreen 0:616601bde9fb 291
AdamGreen 0:616601bde9fb 292 #ifndef USE_CRYPT
AdamGreen 0:616601bde9fb 293 des_set_odd_parity((des_cblock *)des_key);
AdamGreen 0:616601bde9fb 294 #endif
AdamGreen 0:616601bde9fb 295
AdamGreen 0:616601bde9fb 296 #if 0
AdamGreen 0:616601bde9fb 297 CHAPDEBUG(LOG_INFO, ("MakeKey: 56-bit input : %02X%02X%02X%02X%02X%02X%02X\n",
AdamGreen 0:616601bde9fb 298 key[0], key[1], key[2], key[3], key[4], key[5], key[6]));
AdamGreen 0:616601bde9fb 299 CHAPDEBUG(LOG_INFO, ("MakeKey: 64-bit output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
AdamGreen 0:616601bde9fb 300 des_key[0], des_key[1], des_key[2], des_key[3], des_key[4], des_key[5], des_key[6], des_key[7]));
AdamGreen 0:616601bde9fb 301 #endif
AdamGreen 0:616601bde9fb 302 }
AdamGreen 0:616601bde9fb 303
AdamGreen 0:616601bde9fb 304 static void
AdamGreen 0:616601bde9fb 305 ChapMS_NT( char *rchallenge,
AdamGreen 0:616601bde9fb 306 int rchallenge_len,
AdamGreen 0:616601bde9fb 307 char *secret,
AdamGreen 0:616601bde9fb 308 int secret_len,
AdamGreen 0:616601bde9fb 309 MS_ChapResponse *response)
AdamGreen 0:616601bde9fb 310 {
AdamGreen 0:616601bde9fb 311 int i;
AdamGreen 0:616601bde9fb 312 MDstruct md4Context;
AdamGreen 0:616601bde9fb 313 u_char unicodePassword[MAX_NT_PASSWORD * 2];
AdamGreen 0:616601bde9fb 314 static int low_byte_first = -1;
AdamGreen 0:616601bde9fb 315
AdamGreen 0:616601bde9fb 316 LWIP_UNUSED_ARG(rchallenge_len);
AdamGreen 0:616601bde9fb 317
AdamGreen 0:616601bde9fb 318 /* Initialize the Unicode version of the secret (== password). */
AdamGreen 0:616601bde9fb 319 /* This implicitly supports 8-bit ISO8859/1 characters. */
AdamGreen 0:616601bde9fb 320 BZERO(unicodePassword, sizeof(unicodePassword));
AdamGreen 0:616601bde9fb 321 for (i = 0; i < secret_len; i++) {
AdamGreen 0:616601bde9fb 322 unicodePassword[i * 2] = (u_char)secret[i];
AdamGreen 0:616601bde9fb 323 }
AdamGreen 0:616601bde9fb 324 MDbegin(&md4Context);
AdamGreen 0:616601bde9fb 325 MDupdate(&md4Context, unicodePassword, secret_len * 2 * 8); /* Unicode is 2 bytes/char, *8 for bit count */
AdamGreen 0:616601bde9fb 326
AdamGreen 0:616601bde9fb 327 if (low_byte_first == -1) {
AdamGreen 0:616601bde9fb 328 low_byte_first = (PP_HTONS((unsigned short int)1) != 1);
AdamGreen 0:616601bde9fb 329 }
AdamGreen 0:616601bde9fb 330 if (low_byte_first == 0) {
AdamGreen 0:616601bde9fb 331 /* @todo: arg type - u_long* or u_int* ? */
AdamGreen 0:616601bde9fb 332 MDreverse((unsigned int*)&md4Context); /* sfb 961105 */
AdamGreen 0:616601bde9fb 333 }
AdamGreen 0:616601bde9fb 334
AdamGreen 0:616601bde9fb 335 MDupdate(&md4Context, NULL, 0); /* Tell MD4 we're done */
AdamGreen 0:616601bde9fb 336
AdamGreen 0:616601bde9fb 337 ChallengeResponse((u_char*)rchallenge, (u_char*)md4Context.buffer, response->NTResp);
AdamGreen 0:616601bde9fb 338 }
AdamGreen 0:616601bde9fb 339
AdamGreen 0:616601bde9fb 340 #ifdef MSLANMAN
AdamGreen 0:616601bde9fb 341 static u_char *StdText = (u_char *)"KGS!@#$%"; /* key from rasapi32.dll */
AdamGreen 0:616601bde9fb 342
AdamGreen 0:616601bde9fb 343 static void
AdamGreen 0:616601bde9fb 344 ChapMS_LANMan( char *rchallenge,
AdamGreen 0:616601bde9fb 345 int rchallenge_len,
AdamGreen 0:616601bde9fb 346 char *secret,
AdamGreen 0:616601bde9fb 347 int secret_len,
AdamGreen 0:616601bde9fb 348 MS_ChapResponse *response)
AdamGreen 0:616601bde9fb 349 {
AdamGreen 0:616601bde9fb 350 int i;
AdamGreen 0:616601bde9fb 351 u_char UcasePassword[MAX_NT_PASSWORD]; /* max is actually 14 */
AdamGreen 0:616601bde9fb 352 u_char PasswordHash[16];
AdamGreen 0:616601bde9fb 353
AdamGreen 0:616601bde9fb 354 /* LANMan password is case insensitive */
AdamGreen 0:616601bde9fb 355 BZERO(UcasePassword, sizeof(UcasePassword));
AdamGreen 0:616601bde9fb 356 for (i = 0; i < secret_len; i++) {
AdamGreen 0:616601bde9fb 357 UcasePassword[i] = (u_char)toupper(secret[i]);
AdamGreen 0:616601bde9fb 358 }
AdamGreen 0:616601bde9fb 359 DesEncrypt( StdText, UcasePassword + 0, PasswordHash + 0 );
AdamGreen 0:616601bde9fb 360 DesEncrypt( StdText, UcasePassword + 7, PasswordHash + 8 );
AdamGreen 0:616601bde9fb 361 ChallengeResponse(rchallenge, PasswordHash, response->LANManResp);
AdamGreen 0:616601bde9fb 362 }
AdamGreen 0:616601bde9fb 363 #endif
AdamGreen 0:616601bde9fb 364
AdamGreen 0:616601bde9fb 365 void
AdamGreen 0:616601bde9fb 366 ChapMS( chap_state *cstate, char *rchallenge, int rchallenge_len, char *secret, int secret_len)
AdamGreen 0:616601bde9fb 367 {
AdamGreen 0:616601bde9fb 368 MS_ChapResponse response;
AdamGreen 0:616601bde9fb 369 #ifdef MSLANMAN
AdamGreen 0:616601bde9fb 370 extern int ms_lanman;
AdamGreen 0:616601bde9fb 371 #endif
AdamGreen 0:616601bde9fb 372
AdamGreen 0:616601bde9fb 373 #if 0
AdamGreen 0:616601bde9fb 374 CHAPDEBUG(LOG_INFO, ("ChapMS: secret is '%.*s'\n", secret_len, secret));
AdamGreen 0:616601bde9fb 375 #endif
AdamGreen 0:616601bde9fb 376 BZERO(&response, sizeof(response));
AdamGreen 0:616601bde9fb 377
AdamGreen 0:616601bde9fb 378 /* Calculate both always */
AdamGreen 0:616601bde9fb 379 ChapMS_NT(rchallenge, rchallenge_len, secret, secret_len, &response);
AdamGreen 0:616601bde9fb 380
AdamGreen 0:616601bde9fb 381 #ifdef MSLANMAN
AdamGreen 0:616601bde9fb 382 ChapMS_LANMan(rchallenge, rchallenge_len, secret, secret_len, &response);
AdamGreen 0:616601bde9fb 383
AdamGreen 0:616601bde9fb 384 /* prefered method is set by option */
AdamGreen 0:616601bde9fb 385 response.UseNT = !ms_lanman;
AdamGreen 0:616601bde9fb 386 #else
AdamGreen 0:616601bde9fb 387 response.UseNT = 1;
AdamGreen 0:616601bde9fb 388 #endif
AdamGreen 0:616601bde9fb 389
AdamGreen 0:616601bde9fb 390 BCOPY(&response, cstate->response, MS_CHAP_RESPONSE_LEN);
AdamGreen 0:616601bde9fb 391 cstate->resp_length = MS_CHAP_RESPONSE_LEN;
AdamGreen 0:616601bde9fb 392 }
AdamGreen 0:616601bde9fb 393
AdamGreen 0:616601bde9fb 394 #endif /* MSCHAP_SUPPORT */
AdamGreen 0:616601bde9fb 395
AdamGreen 0:616601bde9fb 396 #endif /* PPP_SUPPORT */