Sam Walsh / F7_Ethernet_F746ZG

Forked from the DieterGraef Library

Fork of F7_Ethernet by Dieter Graef

lwip/netif/ppp/chpms.c@0:d26c1b55cfca, 2016-06-19 (annotated)

Committer:
DieterGraef
Date:
Sun Jun 19 16:23:40 2016 +0000
Revision:
0:d26c1b55cfca
Ethernet Library for Nucleo stm32f746ZG and Disco stm32f746NG  works under arm and gcc environment

Who changed what in which revision?

UserRevisionLine numberNew contents of line
DieterGraef 0:d26c1b55cfca 1 /*** WARNING - THIS CODE HAS NOT BEEN FINISHED! ***/
DieterGraef 0:d26c1b55cfca 2 /*** The original PPPD code is written in a way to require either the UNIX DES
DieterGraef 0:d26c1b55cfca 3 encryption functions encrypt(3) and setkey(3) or the DES library libdes.
DieterGraef 0:d26c1b55cfca 4 Since both is not included in lwIP, MSCHAP currently does not work! */
DieterGraef 0:d26c1b55cfca 5 /*****************************************************************************
DieterGraef 0:d26c1b55cfca 6 * chpms.c - Network MicroSoft Challenge Handshake Authentication Protocol program file.
DieterGraef 0:d26c1b55cfca 7 *
DieterGraef 0:d26c1b55cfca 8 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
DieterGraef 0:d26c1b55cfca 9 * Copyright (c) 1997 by Global Election Systems Inc. All rights reserved.
DieterGraef 0:d26c1b55cfca 10 *
DieterGraef 0:d26c1b55cfca 11 * The authors hereby grant permission to use, copy, modify, distribute,
DieterGraef 0:d26c1b55cfca 12 * and license this software and its documentation for any purpose, provided
DieterGraef 0:d26c1b55cfca 13 * that existing copyright notices are retained in all copies and that this
DieterGraef 0:d26c1b55cfca 14 * notice and the following disclaimer are included verbatim in any
DieterGraef 0:d26c1b55cfca 15 * distributions. No written agreement, license, or royalty fee is required
DieterGraef 0:d26c1b55cfca 16 * for any of the authorized uses.
DieterGraef 0:d26c1b55cfca 17 *
DieterGraef 0:d26c1b55cfca 18 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
DieterGraef 0:d26c1b55cfca 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
DieterGraef 0:d26c1b55cfca 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
DieterGraef 0:d26c1b55cfca 21 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
DieterGraef 0:d26c1b55cfca 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
DieterGraef 0:d26c1b55cfca 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DieterGraef 0:d26c1b55cfca 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
DieterGraef 0:d26c1b55cfca 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
DieterGraef 0:d26c1b55cfca 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
DieterGraef 0:d26c1b55cfca 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
DieterGraef 0:d26c1b55cfca 28 *
DieterGraef 0:d26c1b55cfca 29 ******************************************************************************
DieterGraef 0:d26c1b55cfca 30 * REVISION HISTORY
DieterGraef 0:d26c1b55cfca 31 *
DieterGraef 0:d26c1b55cfca 32 * 03-01-01 Marc Boucher <marc@mbsi.ca>
DieterGraef 0:d26c1b55cfca 33 * Ported to lwIP.
DieterGraef 0:d26c1b55cfca 34 * 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
DieterGraef 0:d26c1b55cfca 35 * Original based on BSD chap_ms.c.
DieterGraef 0:d26c1b55cfca 36 *****************************************************************************/
DieterGraef 0:d26c1b55cfca 37 /*
DieterGraef 0:d26c1b55cfca 38 * chap_ms.c - Microsoft MS-CHAP compatible implementation.
DieterGraef 0:d26c1b55cfca 39 *
DieterGraef 0:d26c1b55cfca 40 * Copyright (c) 1995 Eric Rosenquist, Strata Software Limited.
DieterGraef 0:d26c1b55cfca 41 * http://www.strataware.com/
DieterGraef 0:d26c1b55cfca 42 *
DieterGraef 0:d26c1b55cfca 43 * All rights reserved.
DieterGraef 0:d26c1b55cfca 44 *
DieterGraef 0:d26c1b55cfca 45 * Redistribution and use in source and binary forms are permitted
DieterGraef 0:d26c1b55cfca 46 * provided that the above copyright notice and this paragraph are
DieterGraef 0:d26c1b55cfca 47 * duplicated in all such forms and that any documentation,
DieterGraef 0:d26c1b55cfca 48 * advertising materials, and other materials related to such
DieterGraef 0:d26c1b55cfca 49 * distribution and use acknowledge that the software was developed
DieterGraef 0:d26c1b55cfca 50 * by Eric Rosenquist. The name of the author may not be used to
DieterGraef 0:d26c1b55cfca 51 * endorse or promote products derived from this software without
DieterGraef 0:d26c1b55cfca 52 * specific prior written permission.
DieterGraef 0:d26c1b55cfca 53 *
DieterGraef 0:d26c1b55cfca 54 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
DieterGraef 0:d26c1b55cfca 55 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
DieterGraef 0:d26c1b55cfca 56 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
DieterGraef 0:d26c1b55cfca 57 */
DieterGraef 0:d26c1b55cfca 58
DieterGraef 0:d26c1b55cfca 59 /*
DieterGraef 0:d26c1b55cfca 60 * Modifications by Lauri Pesonen / lpesonen@clinet.fi, april 1997
DieterGraef 0:d26c1b55cfca 61 *
DieterGraef 0:d26c1b55cfca 62 * Implemented LANManager type password response to MS-CHAP challenges.
DieterGraef 0:d26c1b55cfca 63 * Now pppd provides both NT style and LANMan style blocks, and the
DieterGraef 0:d26c1b55cfca 64 * prefered is set by option "ms-lanman". Default is to use NT.
DieterGraef 0:d26c1b55cfca 65 * The hash text (StdText) was taken from Win95 RASAPI32.DLL.
DieterGraef 0:d26c1b55cfca 66 *
DieterGraef 0:d26c1b55cfca 67 * You should also use DOMAIN\\USERNAME as described in README.MSCHAP80
DieterGraef 0:d26c1b55cfca 68 */
DieterGraef 0:d26c1b55cfca 69
DieterGraef 0:d26c1b55cfca 70 #define USE_CRYPT
DieterGraef 0:d26c1b55cfca 71
DieterGraef 0:d26c1b55cfca 72 #include "lwip/opt.h"
DieterGraef 0:d26c1b55cfca 73
DieterGraef 0:d26c1b55cfca 74 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
DieterGraef 0:d26c1b55cfca 75
DieterGraef 0:d26c1b55cfca 76 #if MSCHAP_SUPPORT /* don't build if not configured for use in lwipopts.h */
DieterGraef 0:d26c1b55cfca 77
DieterGraef 0:d26c1b55cfca 78 #include "ppp_impl.h"
DieterGraef 0:d26c1b55cfca 79 #include "pppdebug.h"
DieterGraef 0:d26c1b55cfca 80
DieterGraef 0:d26c1b55cfca 81 #include "md4.h"
DieterGraef 0:d26c1b55cfca 82 #ifndef USE_CRYPT
DieterGraef 0:d26c1b55cfca 83 #include "des.h"
DieterGraef 0:d26c1b55cfca 84 #endif
DieterGraef 0:d26c1b55cfca 85 #include "chap.h"
DieterGraef 0:d26c1b55cfca 86 #include "chpms.h"
DieterGraef 0:d26c1b55cfca 87
DieterGraef 0:d26c1b55cfca 88 #include <string.h>
DieterGraef 0:d26c1b55cfca 89
DieterGraef 0:d26c1b55cfca 90
DieterGraef 0:d26c1b55cfca 91 /*************************/
DieterGraef 0:d26c1b55cfca 92 /*** LOCAL DEFINITIONS ***/
DieterGraef 0:d26c1b55cfca 93 /*************************/
DieterGraef 0:d26c1b55cfca 94
DieterGraef 0:d26c1b55cfca 95
DieterGraef 0:d26c1b55cfca 96 /************************/
DieterGraef 0:d26c1b55cfca 97 /*** LOCAL DATA TYPES ***/
DieterGraef 0:d26c1b55cfca 98 /************************/
DieterGraef 0:d26c1b55cfca 99 typedef struct {
DieterGraef 0:d26c1b55cfca 100 u_char LANManResp[24];
DieterGraef 0:d26c1b55cfca 101 u_char NTResp[24];
DieterGraef 0:d26c1b55cfca 102 u_char UseNT; /* If 1, ignore the LANMan response field */
DieterGraef 0:d26c1b55cfca 103 } MS_ChapResponse;
DieterGraef 0:d26c1b55cfca 104 /* We use MS_CHAP_RESPONSE_LEN, rather than sizeof(MS_ChapResponse),
DieterGraef 0:d26c1b55cfca 105 in case this struct gets padded. */
DieterGraef 0:d26c1b55cfca 106
DieterGraef 0:d26c1b55cfca 107
DieterGraef 0:d26c1b55cfca 108
DieterGraef 0:d26c1b55cfca 109 /***********************************/
DieterGraef 0:d26c1b55cfca 110 /*** LOCAL FUNCTION DECLARATIONS ***/
DieterGraef 0:d26c1b55cfca 111 /***********************************/
DieterGraef 0:d26c1b55cfca 112
DieterGraef 0:d26c1b55cfca 113 /* XXX Don't know what to do with these. */
DieterGraef 0:d26c1b55cfca 114 extern void setkey(const char *);
DieterGraef 0:d26c1b55cfca 115 extern void encrypt(char *, int);
DieterGraef 0:d26c1b55cfca 116
DieterGraef 0:d26c1b55cfca 117 static void DesEncrypt (u_char *, u_char *, u_char *);
DieterGraef 0:d26c1b55cfca 118 static void MakeKey (u_char *, u_char *);
DieterGraef 0:d26c1b55cfca 119
DieterGraef 0:d26c1b55cfca 120 #ifdef USE_CRYPT
DieterGraef 0:d26c1b55cfca 121 static void Expand (u_char *, u_char *);
DieterGraef 0:d26c1b55cfca 122 static void Collapse (u_char *, u_char *);
DieterGraef 0:d26c1b55cfca 123 #endif
DieterGraef 0:d26c1b55cfca 124
DieterGraef 0:d26c1b55cfca 125 static void ChallengeResponse(
DieterGraef 0:d26c1b55cfca 126 u_char *challenge, /* IN 8 octets */
DieterGraef 0:d26c1b55cfca 127 u_char *pwHash, /* IN 16 octets */
DieterGraef 0:d26c1b55cfca 128 u_char *response /* OUT 24 octets */
DieterGraef 0:d26c1b55cfca 129 );
DieterGraef 0:d26c1b55cfca 130 static void ChapMS_NT(
DieterGraef 0:d26c1b55cfca 131 char *rchallenge,
DieterGraef 0:d26c1b55cfca 132 int rchallenge_len,
DieterGraef 0:d26c1b55cfca 133 char *secret,
DieterGraef 0:d26c1b55cfca 134 int secret_len,
DieterGraef 0:d26c1b55cfca 135 MS_ChapResponse *response
DieterGraef 0:d26c1b55cfca 136 );
DieterGraef 0:d26c1b55cfca 137 static u_char Get7Bits(
DieterGraef 0:d26c1b55cfca 138 u_char *input,
DieterGraef 0:d26c1b55cfca 139 int startBit
DieterGraef 0:d26c1b55cfca 140 );
DieterGraef 0:d26c1b55cfca 141
DieterGraef 0:d26c1b55cfca 142 static void
DieterGraef 0:d26c1b55cfca 143 ChallengeResponse( u_char *challenge, /* IN 8 octets */
DieterGraef 0:d26c1b55cfca 144 u_char *pwHash, /* IN 16 octets */
DieterGraef 0:d26c1b55cfca 145 u_char *response /* OUT 24 octets */)
DieterGraef 0:d26c1b55cfca 146 {
DieterGraef 0:d26c1b55cfca 147 u_char ZPasswordHash[21];
DieterGraef 0:d26c1b55cfca 148
DieterGraef 0:d26c1b55cfca 149 BZERO(ZPasswordHash, sizeof(ZPasswordHash));
DieterGraef 0:d26c1b55cfca 150 BCOPY(pwHash, ZPasswordHash, 16);
DieterGraef 0:d26c1b55cfca 151
DieterGraef 0:d26c1b55cfca 152 #if 0
DieterGraef 0:d26c1b55cfca 153 log_packet(ZPasswordHash, sizeof(ZPasswordHash), "ChallengeResponse - ZPasswordHash", LOG_DEBUG);
DieterGraef 0:d26c1b55cfca 154 #endif
DieterGraef 0:d26c1b55cfca 155
DieterGraef 0:d26c1b55cfca 156 DesEncrypt(challenge, ZPasswordHash + 0, response + 0);
DieterGraef 0:d26c1b55cfca 157 DesEncrypt(challenge, ZPasswordHash + 7, response + 8);
DieterGraef 0:d26c1b55cfca 158 DesEncrypt(challenge, ZPasswordHash + 14, response + 16);
DieterGraef 0:d26c1b55cfca 159
DieterGraef 0:d26c1b55cfca 160 #if 0
DieterGraef 0:d26c1b55cfca 161 log_packet(response, 24, "ChallengeResponse - response", LOG_DEBUG);
DieterGraef 0:d26c1b55cfca 162 #endif
DieterGraef 0:d26c1b55cfca 163 }
DieterGraef 0:d26c1b55cfca 164
DieterGraef 0:d26c1b55cfca 165
DieterGraef 0:d26c1b55cfca 166 #ifdef USE_CRYPT
DieterGraef 0:d26c1b55cfca 167 static void
DieterGraef 0:d26c1b55cfca 168 DesEncrypt( u_char *clear, /* IN 8 octets */
DieterGraef 0:d26c1b55cfca 169 u_char *key, /* IN 7 octets */
DieterGraef 0:d26c1b55cfca 170 u_char *cipher /* OUT 8 octets */)
DieterGraef 0:d26c1b55cfca 171 {
DieterGraef 0:d26c1b55cfca 172 u_char des_key[8];
DieterGraef 0:d26c1b55cfca 173 u_char crypt_key[66];
DieterGraef 0:d26c1b55cfca 174 u_char des_input[66];
DieterGraef 0:d26c1b55cfca 175
DieterGraef 0:d26c1b55cfca 176 MakeKey(key, des_key);
DieterGraef 0:d26c1b55cfca 177
DieterGraef 0:d26c1b55cfca 178 Expand(des_key, crypt_key);
DieterGraef 0:d26c1b55cfca 179 setkey((char*)crypt_key);
DieterGraef 0:d26c1b55cfca 180
DieterGraef 0:d26c1b55cfca 181 #if 0
DieterGraef 0:d26c1b55cfca 182 CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X\n",
DieterGraef 0:d26c1b55cfca 183 clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7]));
DieterGraef 0:d26c1b55cfca 184 #endif
DieterGraef 0:d26c1b55cfca 185
DieterGraef 0:d26c1b55cfca 186 Expand(clear, des_input);
DieterGraef 0:d26c1b55cfca 187 encrypt((char*)des_input, 0);
DieterGraef 0:d26c1b55cfca 188 Collapse(des_input, cipher);
DieterGraef 0:d26c1b55cfca 189
DieterGraef 0:d26c1b55cfca 190 #if 0
DieterGraef 0:d26c1b55cfca 191 CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
DieterGraef 0:d26c1b55cfca 192 cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7]));
DieterGraef 0:d26c1b55cfca 193 #endif
DieterGraef 0:d26c1b55cfca 194 }
DieterGraef 0:d26c1b55cfca 195
DieterGraef 0:d26c1b55cfca 196 #else /* USE_CRYPT */
DieterGraef 0:d26c1b55cfca 197
DieterGraef 0:d26c1b55cfca 198 static void
DieterGraef 0:d26c1b55cfca 199 DesEncrypt( u_char *clear, /* IN 8 octets */
DieterGraef 0:d26c1b55cfca 200 u_char *key, /* IN 7 octets */
DieterGraef 0:d26c1b55cfca 201 u_char *cipher /* OUT 8 octets */)
DieterGraef 0:d26c1b55cfca 202 {
DieterGraef 0:d26c1b55cfca 203 des_cblock des_key;
DieterGraef 0:d26c1b55cfca 204 des_key_schedule key_schedule;
DieterGraef 0:d26c1b55cfca 205
DieterGraef 0:d26c1b55cfca 206 MakeKey(key, des_key);
DieterGraef 0:d26c1b55cfca 207
DieterGraef 0:d26c1b55cfca 208 des_set_key(&des_key, key_schedule);
DieterGraef 0:d26c1b55cfca 209
DieterGraef 0:d26c1b55cfca 210 #if 0
DieterGraef 0:d26c1b55cfca 211 CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X\n",
DieterGraef 0:d26c1b55cfca 212 clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7]));
DieterGraef 0:d26c1b55cfca 213 #endif
DieterGraef 0:d26c1b55cfca 214
DieterGraef 0:d26c1b55cfca 215 des_ecb_encrypt((des_cblock *)clear, (des_cblock *)cipher, key_schedule, 1);
DieterGraef 0:d26c1b55cfca 216
DieterGraef 0:d26c1b55cfca 217 #if 0
DieterGraef 0:d26c1b55cfca 218 CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
DieterGraef 0:d26c1b55cfca 219 cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7]));
DieterGraef 0:d26c1b55cfca 220 #endif
DieterGraef 0:d26c1b55cfca 221 }
DieterGraef 0:d26c1b55cfca 222
DieterGraef 0:d26c1b55cfca 223 #endif /* USE_CRYPT */
DieterGraef 0:d26c1b55cfca 224
DieterGraef 0:d26c1b55cfca 225
DieterGraef 0:d26c1b55cfca 226 static u_char
DieterGraef 0:d26c1b55cfca 227 Get7Bits( u_char *input, int startBit)
DieterGraef 0:d26c1b55cfca 228 {
DieterGraef 0:d26c1b55cfca 229 register unsigned int word;
DieterGraef 0:d26c1b55cfca 230
DieterGraef 0:d26c1b55cfca 231 word = (unsigned)input[startBit / 8] << 8;
DieterGraef 0:d26c1b55cfca 232 word |= (unsigned)input[startBit / 8 + 1];
DieterGraef 0:d26c1b55cfca 233
DieterGraef 0:d26c1b55cfca 234 word >>= 15 - (startBit % 8 + 7);
DieterGraef 0:d26c1b55cfca 235
DieterGraef 0:d26c1b55cfca 236 return word & 0xFE;
DieterGraef 0:d26c1b55cfca 237 }
DieterGraef 0:d26c1b55cfca 238
DieterGraef 0:d26c1b55cfca 239 #ifdef USE_CRYPT
DieterGraef 0:d26c1b55cfca 240
DieterGraef 0:d26c1b55cfca 241 /* in == 8-byte string (expanded version of the 56-bit key)
DieterGraef 0:d26c1b55cfca 242 * out == 64-byte string where each byte is either 1 or 0
DieterGraef 0:d26c1b55cfca 243 * Note that the low-order "bit" is always ignored by by setkey()
DieterGraef 0:d26c1b55cfca 244 */
DieterGraef 0:d26c1b55cfca 245 static void
DieterGraef 0:d26c1b55cfca 246 Expand(u_char *in, u_char *out)
DieterGraef 0:d26c1b55cfca 247 {
DieterGraef 0:d26c1b55cfca 248 int j, c;
DieterGraef 0:d26c1b55cfca 249 int i;
DieterGraef 0:d26c1b55cfca 250
DieterGraef 0:d26c1b55cfca 251 for(i = 0; i < 64; in++){
DieterGraef 0:d26c1b55cfca 252 c = *in;
DieterGraef 0:d26c1b55cfca 253 for(j = 7; j >= 0; j--) {
DieterGraef 0:d26c1b55cfca 254 *out++ = (c >> j) & 01;
DieterGraef 0:d26c1b55cfca 255 }
DieterGraef 0:d26c1b55cfca 256 i += 8;
DieterGraef 0:d26c1b55cfca 257 }
DieterGraef 0:d26c1b55cfca 258 }
DieterGraef 0:d26c1b55cfca 259
DieterGraef 0:d26c1b55cfca 260 /* The inverse of Expand
DieterGraef 0:d26c1b55cfca 261 */
DieterGraef 0:d26c1b55cfca 262 static void
DieterGraef 0:d26c1b55cfca 263 Collapse(u_char *in, u_char *out)
DieterGraef 0:d26c1b55cfca 264 {
DieterGraef 0:d26c1b55cfca 265 int j;
DieterGraef 0:d26c1b55cfca 266 int i;
DieterGraef 0:d26c1b55cfca 267 unsigned int c;
DieterGraef 0:d26c1b55cfca 268
DieterGraef 0:d26c1b55cfca 269 for (i = 0; i < 64; i += 8, out++) {
DieterGraef 0:d26c1b55cfca 270 c = 0;
DieterGraef 0:d26c1b55cfca 271 for (j = 7; j >= 0; j--, in++) {
DieterGraef 0:d26c1b55cfca 272 c |= *in << j;
DieterGraef 0:d26c1b55cfca 273 }
DieterGraef 0:d26c1b55cfca 274 *out = c & 0xff;
DieterGraef 0:d26c1b55cfca 275 }
DieterGraef 0:d26c1b55cfca 276 }
DieterGraef 0:d26c1b55cfca 277 #endif
DieterGraef 0:d26c1b55cfca 278
DieterGraef 0:d26c1b55cfca 279 static void
DieterGraef 0:d26c1b55cfca 280 MakeKey( u_char *key, /* IN 56 bit DES key missing parity bits */
DieterGraef 0:d26c1b55cfca 281 u_char *des_key /* OUT 64 bit DES key with parity bits added */)
DieterGraef 0:d26c1b55cfca 282 {
DieterGraef 0:d26c1b55cfca 283 des_key[0] = Get7Bits(key, 0);
DieterGraef 0:d26c1b55cfca 284 des_key[1] = Get7Bits(key, 7);
DieterGraef 0:d26c1b55cfca 285 des_key[2] = Get7Bits(key, 14);
DieterGraef 0:d26c1b55cfca 286 des_key[3] = Get7Bits(key, 21);
DieterGraef 0:d26c1b55cfca 287 des_key[4] = Get7Bits(key, 28);
DieterGraef 0:d26c1b55cfca 288 des_key[5] = Get7Bits(key, 35);
DieterGraef 0:d26c1b55cfca 289 des_key[6] = Get7Bits(key, 42);
DieterGraef 0:d26c1b55cfca 290 des_key[7] = Get7Bits(key, 49);
DieterGraef 0:d26c1b55cfca 291
DieterGraef 0:d26c1b55cfca 292 #ifndef USE_CRYPT
DieterGraef 0:d26c1b55cfca 293 des_set_odd_parity((des_cblock *)des_key);
DieterGraef 0:d26c1b55cfca 294 #endif
DieterGraef 0:d26c1b55cfca 295
DieterGraef 0:d26c1b55cfca 296 #if 0
DieterGraef 0:d26c1b55cfca 297 CHAPDEBUG(LOG_INFO, ("MakeKey: 56-bit input : %02X%02X%02X%02X%02X%02X%02X\n",
DieterGraef 0:d26c1b55cfca 298 key[0], key[1], key[2], key[3], key[4], key[5], key[6]));
DieterGraef 0:d26c1b55cfca 299 CHAPDEBUG(LOG_INFO, ("MakeKey: 64-bit output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
DieterGraef 0:d26c1b55cfca 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]));
DieterGraef 0:d26c1b55cfca 301 #endif
DieterGraef 0:d26c1b55cfca 302 }
DieterGraef 0:d26c1b55cfca 303
DieterGraef 0:d26c1b55cfca 304 static void
DieterGraef 0:d26c1b55cfca 305 ChapMS_NT( char *rchallenge,
DieterGraef 0:d26c1b55cfca 306 int rchallenge_len,
DieterGraef 0:d26c1b55cfca 307 char *secret,
DieterGraef 0:d26c1b55cfca 308 int secret_len,
DieterGraef 0:d26c1b55cfca 309 MS_ChapResponse *response)
DieterGraef 0:d26c1b55cfca 310 {
DieterGraef 0:d26c1b55cfca 311 int i;
DieterGraef 0:d26c1b55cfca 312 MDstruct md4Context;
DieterGraef 0:d26c1b55cfca 313 u_char unicodePassword[MAX_NT_PASSWORD * 2];
DieterGraef 0:d26c1b55cfca 314 static int low_byte_first = -1;
DieterGraef 0:d26c1b55cfca 315
DieterGraef 0:d26c1b55cfca 316 LWIP_UNUSED_ARG(rchallenge_len);
DieterGraef 0:d26c1b55cfca 317
DieterGraef 0:d26c1b55cfca 318 /* Initialize the Unicode version of the secret (== password). */
DieterGraef 0:d26c1b55cfca 319 /* This implicitly supports 8-bit ISO8859/1 characters. */
DieterGraef 0:d26c1b55cfca 320 BZERO(unicodePassword, sizeof(unicodePassword));
DieterGraef 0:d26c1b55cfca 321 for (i = 0; i < secret_len; i++) {
DieterGraef 0:d26c1b55cfca 322 unicodePassword[i * 2] = (u_char)secret[i];
DieterGraef 0:d26c1b55cfca 323 }
DieterGraef 0:d26c1b55cfca 324 MDbegin(&md4Context);
DieterGraef 0:d26c1b55cfca 325 MDupdate(&md4Context, unicodePassword, secret_len * 2 * 8); /* Unicode is 2 bytes/char, *8 for bit count */
DieterGraef 0:d26c1b55cfca 326
DieterGraef 0:d26c1b55cfca 327 if (low_byte_first == -1) {
DieterGraef 0:d26c1b55cfca 328 low_byte_first = (PP_HTONS((unsigned short int)1) != 1);
DieterGraef 0:d26c1b55cfca 329 }
DieterGraef 0:d26c1b55cfca 330 if (low_byte_first == 0) {
DieterGraef 0:d26c1b55cfca 331 /* @todo: arg type - u_long* or u_int* ? */
DieterGraef 0:d26c1b55cfca 332 MDreverse((unsigned int*)&md4Context); /* sfb 961105 */
DieterGraef 0:d26c1b55cfca 333 }
DieterGraef 0:d26c1b55cfca 334
DieterGraef 0:d26c1b55cfca 335 MDupdate(&md4Context, NULL, 0); /* Tell MD4 we're done */
DieterGraef 0:d26c1b55cfca 336
DieterGraef 0:d26c1b55cfca 337 ChallengeResponse((u_char*)rchallenge, (u_char*)md4Context.buffer, response->NTResp);
DieterGraef 0:d26c1b55cfca 338 }
DieterGraef 0:d26c1b55cfca 339
DieterGraef 0:d26c1b55cfca 340 #ifdef MSLANMAN
DieterGraef 0:d26c1b55cfca 341 static u_char *StdText = (u_char *)"KGS!@#$%"; /* key from rasapi32.dll */
DieterGraef 0:d26c1b55cfca 342
DieterGraef 0:d26c1b55cfca 343 static void
DieterGraef 0:d26c1b55cfca 344 ChapMS_LANMan( char *rchallenge,
DieterGraef 0:d26c1b55cfca 345 int rchallenge_len,
DieterGraef 0:d26c1b55cfca 346 char *secret,
DieterGraef 0:d26c1b55cfca 347 int secret_len,
DieterGraef 0:d26c1b55cfca 348 MS_ChapResponse *response)
DieterGraef 0:d26c1b55cfca 349 {
DieterGraef 0:d26c1b55cfca 350 int i;
DieterGraef 0:d26c1b55cfca 351 u_char UcasePassword[MAX_NT_PASSWORD]; /* max is actually 14 */
DieterGraef 0:d26c1b55cfca 352 u_char PasswordHash[16];
DieterGraef 0:d26c1b55cfca 353
DieterGraef 0:d26c1b55cfca 354 /* LANMan password is case insensitive */
DieterGraef 0:d26c1b55cfca 355 BZERO(UcasePassword, sizeof(UcasePassword));
DieterGraef 0:d26c1b55cfca 356 for (i = 0; i < secret_len; i++) {
DieterGraef 0:d26c1b55cfca 357 UcasePassword[i] = (u_char)toupper(secret[i]);
DieterGraef 0:d26c1b55cfca 358 }
DieterGraef 0:d26c1b55cfca 359 DesEncrypt( StdText, UcasePassword + 0, PasswordHash + 0 );
DieterGraef 0:d26c1b55cfca 360 DesEncrypt( StdText, UcasePassword + 7, PasswordHash + 8 );
DieterGraef 0:d26c1b55cfca 361 ChallengeResponse(rchallenge, PasswordHash, response->LANManResp);
DieterGraef 0:d26c1b55cfca 362 }
DieterGraef 0:d26c1b55cfca 363 #endif
DieterGraef 0:d26c1b55cfca 364
DieterGraef 0:d26c1b55cfca 365 void
DieterGraef 0:d26c1b55cfca 366 ChapMS( chap_state *cstate, char *rchallenge, int rchallenge_len, char *secret, int secret_len)
DieterGraef 0:d26c1b55cfca 367 {
DieterGraef 0:d26c1b55cfca 368 MS_ChapResponse response;
DieterGraef 0:d26c1b55cfca 369 #ifdef MSLANMAN
DieterGraef 0:d26c1b55cfca 370 extern int ms_lanman;
DieterGraef 0:d26c1b55cfca 371 #endif
DieterGraef 0:d26c1b55cfca 372
DieterGraef 0:d26c1b55cfca 373 #if 0
DieterGraef 0:d26c1b55cfca 374 CHAPDEBUG(LOG_INFO, ("ChapMS: secret is '%.*s'\n", secret_len, secret));
DieterGraef 0:d26c1b55cfca 375 #endif
DieterGraef 0:d26c1b55cfca 376 BZERO(&response, sizeof(response));
DieterGraef 0:d26c1b55cfca 377
DieterGraef 0:d26c1b55cfca 378 /* Calculate both always */
DieterGraef 0:d26c1b55cfca 379 ChapMS_NT(rchallenge, rchallenge_len, secret, secret_len, &response);
DieterGraef 0:d26c1b55cfca 380
DieterGraef 0:d26c1b55cfca 381 #ifdef MSLANMAN
DieterGraef 0:d26c1b55cfca 382 ChapMS_LANMan(rchallenge, rchallenge_len, secret, secret_len, &response);
DieterGraef 0:d26c1b55cfca 383
DieterGraef 0:d26c1b55cfca 384 /* prefered method is set by option */
DieterGraef 0:d26c1b55cfca 385 response.UseNT = !ms_lanman;
DieterGraef 0:d26c1b55cfca 386 #else
DieterGraef 0:d26c1b55cfca 387 response.UseNT = 1;
DieterGraef 0:d26c1b55cfca 388 #endif
DieterGraef 0:d26c1b55cfca 389
DieterGraef 0:d26c1b55cfca 390 BCOPY(&response, cstate->response, MS_CHAP_RESPONSE_LEN);
DieterGraef 0:d26c1b55cfca 391 cstate->resp_length = MS_CHAP_RESPONSE_LEN;
DieterGraef 0:d26c1b55cfca 392 }
DieterGraef 0:d26c1b55cfca 393
DieterGraef 0:d26c1b55cfca 394 #endif /* MSCHAP_SUPPORT */
DieterGraef 0:d26c1b55cfca 395
DieterGraef 0:d26c1b55cfca 396 #endif /* PPP_SUPPORT */