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NetServices/lwip/netif/ppp/chpms.c@0:05ccbd4f84f1, 2013-12-02 (annotated)

Committer:
hendrikvincent
Date:
Mon Dec 02 09:01:23 2013 +0000
Revision:
0:05ccbd4f84f1
eerste programma;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hendrikvincent 0:05ccbd4f84f1 1 /*** WARNING - THIS CODE HAS NOT BEEN FINISHED! ***/
hendrikvincent 0:05ccbd4f84f1 2 /*** The original PPPD code is written in a way to require either the UNIX DES
hendrikvincent 0:05ccbd4f84f1 3 encryption functions encrypt(3) and setkey(3) or the DES library libdes.
hendrikvincent 0:05ccbd4f84f1 4 Since both is not included in lwIP, MSCHAP currently does not work! */
hendrikvincent 0:05ccbd4f84f1 5 /*****************************************************************************
hendrikvincent 0:05ccbd4f84f1 6 * chpms.c - Network MicroSoft Challenge Handshake Authentication Protocol program file.
hendrikvincent 0:05ccbd4f84f1 7 *
hendrikvincent 0:05ccbd4f84f1 8 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
hendrikvincent 0:05ccbd4f84f1 9 * Copyright (c) 1997 by Global Election Systems Inc. All rights reserved.
hendrikvincent 0:05ccbd4f84f1 10 *
hendrikvincent 0:05ccbd4f84f1 11 * The authors hereby grant permission to use, copy, modify, distribute,
hendrikvincent 0:05ccbd4f84f1 12 * and license this software and its documentation for any purpose, provided
hendrikvincent 0:05ccbd4f84f1 13 * that existing copyright notices are retained in all copies and that this
hendrikvincent 0:05ccbd4f84f1 14 * notice and the following disclaimer are included verbatim in any
hendrikvincent 0:05ccbd4f84f1 15 * distributions. No written agreement, license, or royalty fee is required
hendrikvincent 0:05ccbd4f84f1 16 * for any of the authorized uses.
hendrikvincent 0:05ccbd4f84f1 17 *
hendrikvincent 0:05ccbd4f84f1 18 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
hendrikvincent 0:05ccbd4f84f1 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
hendrikvincent 0:05ccbd4f84f1 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
hendrikvincent 0:05ccbd4f84f1 21 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
hendrikvincent 0:05ccbd4f84f1 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
hendrikvincent 0:05ccbd4f84f1 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
hendrikvincent 0:05ccbd4f84f1 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
hendrikvincent 0:05ccbd4f84f1 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
hendrikvincent 0:05ccbd4f84f1 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
hendrikvincent 0:05ccbd4f84f1 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
hendrikvincent 0:05ccbd4f84f1 28 *
hendrikvincent 0:05ccbd4f84f1 29 ******************************************************************************
hendrikvincent 0:05ccbd4f84f1 30 * REVISION HISTORY
hendrikvincent 0:05ccbd4f84f1 31 *
hendrikvincent 0:05ccbd4f84f1 32 * 03-01-01 Marc Boucher <marc@mbsi.ca>
hendrikvincent 0:05ccbd4f84f1 33 * Ported to lwIP.
hendrikvincent 0:05ccbd4f84f1 34 * 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
hendrikvincent 0:05ccbd4f84f1 35 * Original based on BSD chap_ms.c.
hendrikvincent 0:05ccbd4f84f1 36 *****************************************************************************/
hendrikvincent 0:05ccbd4f84f1 37 /*
hendrikvincent 0:05ccbd4f84f1 38 * chap_ms.c - Microsoft MS-CHAP compatible implementation.
hendrikvincent 0:05ccbd4f84f1 39 *
hendrikvincent 0:05ccbd4f84f1 40 * Copyright (c) 1995 Eric Rosenquist, Strata Software Limited.
hendrikvincent 0:05ccbd4f84f1 41 * http://www.strataware.com/
hendrikvincent 0:05ccbd4f84f1 42 *
hendrikvincent 0:05ccbd4f84f1 43 * All rights reserved.
hendrikvincent 0:05ccbd4f84f1 44 *
hendrikvincent 0:05ccbd4f84f1 45 * Redistribution and use in source and binary forms are permitted
hendrikvincent 0:05ccbd4f84f1 46 * provided that the above copyright notice and this paragraph are
hendrikvincent 0:05ccbd4f84f1 47 * duplicated in all such forms and that any documentation,
hendrikvincent 0:05ccbd4f84f1 48 * advertising materials, and other materials related to such
hendrikvincent 0:05ccbd4f84f1 49 * distribution and use acknowledge that the software was developed
hendrikvincent 0:05ccbd4f84f1 50 * by Eric Rosenquist. The name of the author may not be used to
hendrikvincent 0:05ccbd4f84f1 51 * endorse or promote products derived from this software without
hendrikvincent 0:05ccbd4f84f1 52 * specific prior written permission.
hendrikvincent 0:05ccbd4f84f1 53 *
hendrikvincent 0:05ccbd4f84f1 54 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
hendrikvincent 0:05ccbd4f84f1 55 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
hendrikvincent 0:05ccbd4f84f1 56 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
hendrikvincent 0:05ccbd4f84f1 57 */
hendrikvincent 0:05ccbd4f84f1 58
hendrikvincent 0:05ccbd4f84f1 59 /*
hendrikvincent 0:05ccbd4f84f1 60 * Modifications by Lauri Pesonen / lpesonen@clinet.fi, april 1997
hendrikvincent 0:05ccbd4f84f1 61 *
hendrikvincent 0:05ccbd4f84f1 62 * Implemented LANManager type password response to MS-CHAP challenges.
hendrikvincent 0:05ccbd4f84f1 63 * Now pppd provides both NT style and LANMan style blocks, and the
hendrikvincent 0:05ccbd4f84f1 64 * prefered is set by option "ms-lanman". Default is to use NT.
hendrikvincent 0:05ccbd4f84f1 65 * The hash text (StdText) was taken from Win95 RASAPI32.DLL.
hendrikvincent 0:05ccbd4f84f1 66 *
hendrikvincent 0:05ccbd4f84f1 67 * You should also use DOMAIN\\USERNAME as described in README.MSCHAP80
hendrikvincent 0:05ccbd4f84f1 68 */
hendrikvincent 0:05ccbd4f84f1 69
hendrikvincent 0:05ccbd4f84f1 70 #define USE_CRYPT
hendrikvincent 0:05ccbd4f84f1 71
hendrikvincent 0:05ccbd4f84f1 72 #include "lwip/opt.h"
hendrikvincent 0:05ccbd4f84f1 73
hendrikvincent 0:05ccbd4f84f1 74 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
hendrikvincent 0:05ccbd4f84f1 75
hendrikvincent 0:05ccbd4f84f1 76 #if MSCHAP_SUPPORT /* don't build if not configured for use in lwipopts.h */
hendrikvincent 0:05ccbd4f84f1 77
hendrikvincent 0:05ccbd4f84f1 78 #include "ppp.h"
hendrikvincent 0:05ccbd4f84f1 79 #include "pppdebug.h"
hendrikvincent 0:05ccbd4f84f1 80
hendrikvincent 0:05ccbd4f84f1 81 #include "md4.h"
hendrikvincent 0:05ccbd4f84f1 82 #ifndef USE_CRYPT
hendrikvincent 0:05ccbd4f84f1 83 #include "des.h"
hendrikvincent 0:05ccbd4f84f1 84 #endif
hendrikvincent 0:05ccbd4f84f1 85 #include "chap.h"
hendrikvincent 0:05ccbd4f84f1 86 #include "chpms.h"
hendrikvincent 0:05ccbd4f84f1 87
hendrikvincent 0:05ccbd4f84f1 88 #include <string.h>
hendrikvincent 0:05ccbd4f84f1 89
hendrikvincent 0:05ccbd4f84f1 90
hendrikvincent 0:05ccbd4f84f1 91 /*************************/
hendrikvincent 0:05ccbd4f84f1 92 /*** LOCAL DEFINITIONS ***/
hendrikvincent 0:05ccbd4f84f1 93 /*************************/
hendrikvincent 0:05ccbd4f84f1 94
hendrikvincent 0:05ccbd4f84f1 95
hendrikvincent 0:05ccbd4f84f1 96 /************************/
hendrikvincent 0:05ccbd4f84f1 97 /*** LOCAL DATA TYPES ***/
hendrikvincent 0:05ccbd4f84f1 98 /************************/
hendrikvincent 0:05ccbd4f84f1 99 typedef struct {
hendrikvincent 0:05ccbd4f84f1 100 u_char LANManResp[24];
hendrikvincent 0:05ccbd4f84f1 101 u_char NTResp[24];
hendrikvincent 0:05ccbd4f84f1 102 u_char UseNT; /* If 1, ignore the LANMan response field */
hendrikvincent 0:05ccbd4f84f1 103 } MS_ChapResponse;
hendrikvincent 0:05ccbd4f84f1 104 /* We use MS_CHAP_RESPONSE_LEN, rather than sizeof(MS_ChapResponse),
hendrikvincent 0:05ccbd4f84f1 105 in case this struct gets padded. */
hendrikvincent 0:05ccbd4f84f1 106
hendrikvincent 0:05ccbd4f84f1 107
hendrikvincent 0:05ccbd4f84f1 108
hendrikvincent 0:05ccbd4f84f1 109 /***********************************/
hendrikvincent 0:05ccbd4f84f1 110 /*** LOCAL FUNCTION DECLARATIONS ***/
hendrikvincent 0:05ccbd4f84f1 111 /***********************************/
hendrikvincent 0:05ccbd4f84f1 112
hendrikvincent 0:05ccbd4f84f1 113 /* XXX Don't know what to do with these. */
hendrikvincent 0:05ccbd4f84f1 114 extern void setkey(const char *);
hendrikvincent 0:05ccbd4f84f1 115 extern void encrypt(char *, int);
hendrikvincent 0:05ccbd4f84f1 116
hendrikvincent 0:05ccbd4f84f1 117 static void DesEncrypt (u_char *, u_char *, u_char *);
hendrikvincent 0:05ccbd4f84f1 118 static void MakeKey (u_char *, u_char *);
hendrikvincent 0:05ccbd4f84f1 119
hendrikvincent 0:05ccbd4f84f1 120 #ifdef USE_CRYPT
hendrikvincent 0:05ccbd4f84f1 121 static void Expand (u_char *, u_char *);
hendrikvincent 0:05ccbd4f84f1 122 static void Collapse (u_char *, u_char *);
hendrikvincent 0:05ccbd4f84f1 123 #endif
hendrikvincent 0:05ccbd4f84f1 124
hendrikvincent 0:05ccbd4f84f1 125 static void ChallengeResponse(
hendrikvincent 0:05ccbd4f84f1 126 u_char *challenge, /* IN 8 octets */
hendrikvincent 0:05ccbd4f84f1 127 u_char *pwHash, /* IN 16 octets */
hendrikvincent 0:05ccbd4f84f1 128 u_char *response /* OUT 24 octets */
hendrikvincent 0:05ccbd4f84f1 129 );
hendrikvincent 0:05ccbd4f84f1 130 static void ChapMS_NT(
hendrikvincent 0:05ccbd4f84f1 131 char *rchallenge,
hendrikvincent 0:05ccbd4f84f1 132 int rchallenge_len,
hendrikvincent 0:05ccbd4f84f1 133 char *secret,
hendrikvincent 0:05ccbd4f84f1 134 int secret_len,
hendrikvincent 0:05ccbd4f84f1 135 MS_ChapResponse *response
hendrikvincent 0:05ccbd4f84f1 136 );
hendrikvincent 0:05ccbd4f84f1 137 static u_char Get7Bits(
hendrikvincent 0:05ccbd4f84f1 138 u_char *input,
hendrikvincent 0:05ccbd4f84f1 139 int startBit
hendrikvincent 0:05ccbd4f84f1 140 );
hendrikvincent 0:05ccbd4f84f1 141
hendrikvincent 0:05ccbd4f84f1 142 static void
hendrikvincent 0:05ccbd4f84f1 143 ChallengeResponse( u_char *challenge, /* IN 8 octets */
hendrikvincent 0:05ccbd4f84f1 144 u_char *pwHash, /* IN 16 octets */
hendrikvincent 0:05ccbd4f84f1 145 u_char *response /* OUT 24 octets */)
hendrikvincent 0:05ccbd4f84f1 146 {
hendrikvincent 0:05ccbd4f84f1 147 u_char ZPasswordHash[21];
hendrikvincent 0:05ccbd4f84f1 148
hendrikvincent 0:05ccbd4f84f1 149 BZERO(ZPasswordHash, sizeof(ZPasswordHash));
hendrikvincent 0:05ccbd4f84f1 150 BCOPY(pwHash, ZPasswordHash, 16);
hendrikvincent 0:05ccbd4f84f1 151
hendrikvincent 0:05ccbd4f84f1 152 #if 0
hendrikvincent 0:05ccbd4f84f1 153 log_packet(ZPasswordHash, sizeof(ZPasswordHash), "ChallengeResponse - ZPasswordHash", LOG_DEBUG);
hendrikvincent 0:05ccbd4f84f1 154 #endif
hendrikvincent 0:05ccbd4f84f1 155
hendrikvincent 0:05ccbd4f84f1 156 DesEncrypt(challenge, ZPasswordHash + 0, response + 0);
hendrikvincent 0:05ccbd4f84f1 157 DesEncrypt(challenge, ZPasswordHash + 7, response + 8);
hendrikvincent 0:05ccbd4f84f1 158 DesEncrypt(challenge, ZPasswordHash + 14, response + 16);
hendrikvincent 0:05ccbd4f84f1 159
hendrikvincent 0:05ccbd4f84f1 160 #if 0
hendrikvincent 0:05ccbd4f84f1 161 log_packet(response, 24, "ChallengeResponse - response", LOG_DEBUG);
hendrikvincent 0:05ccbd4f84f1 162 #endif
hendrikvincent 0:05ccbd4f84f1 163 }
hendrikvincent 0:05ccbd4f84f1 164
hendrikvincent 0:05ccbd4f84f1 165
hendrikvincent 0:05ccbd4f84f1 166 #ifdef USE_CRYPT
hendrikvincent 0:05ccbd4f84f1 167 static void
hendrikvincent 0:05ccbd4f84f1 168 DesEncrypt( u_char *clear, /* IN 8 octets */
hendrikvincent 0:05ccbd4f84f1 169 u_char *key, /* IN 7 octets */
hendrikvincent 0:05ccbd4f84f1 170 u_char *cipher /* OUT 8 octets */)
hendrikvincent 0:05ccbd4f84f1 171 {
hendrikvincent 0:05ccbd4f84f1 172 u_char des_key[8];
hendrikvincent 0:05ccbd4f84f1 173 u_char crypt_key[66];
hendrikvincent 0:05ccbd4f84f1 174 u_char des_input[66];
hendrikvincent 0:05ccbd4f84f1 175
hendrikvincent 0:05ccbd4f84f1 176 MakeKey(key, des_key);
hendrikvincent 0:05ccbd4f84f1 177
hendrikvincent 0:05ccbd4f84f1 178 Expand(des_key, crypt_key);
hendrikvincent 0:05ccbd4f84f1 179 setkey((char*)crypt_key);
hendrikvincent 0:05ccbd4f84f1 180
hendrikvincent 0:05ccbd4f84f1 181 #if 0
hendrikvincent 0:05ccbd4f84f1 182 CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X\n",
hendrikvincent 0:05ccbd4f84f1 183 clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7]));
hendrikvincent 0:05ccbd4f84f1 184 #endif
hendrikvincent 0:05ccbd4f84f1 185
hendrikvincent 0:05ccbd4f84f1 186 Expand(clear, des_input);
hendrikvincent 0:05ccbd4f84f1 187 encrypt((char*)des_input, 0);
hendrikvincent 0:05ccbd4f84f1 188 Collapse(des_input, cipher);
hendrikvincent 0:05ccbd4f84f1 189
hendrikvincent 0:05ccbd4f84f1 190 #if 0
hendrikvincent 0:05ccbd4f84f1 191 CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
hendrikvincent 0:05ccbd4f84f1 192 cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7]));
hendrikvincent 0:05ccbd4f84f1 193 #endif
hendrikvincent 0:05ccbd4f84f1 194 }
hendrikvincent 0:05ccbd4f84f1 195
hendrikvincent 0:05ccbd4f84f1 196 #else /* USE_CRYPT */
hendrikvincent 0:05ccbd4f84f1 197
hendrikvincent 0:05ccbd4f84f1 198 static void
hendrikvincent 0:05ccbd4f84f1 199 DesEncrypt( u_char *clear, /* IN 8 octets */
hendrikvincent 0:05ccbd4f84f1 200 u_char *key, /* IN 7 octets */
hendrikvincent 0:05ccbd4f84f1 201 u_char *cipher /* OUT 8 octets */)
hendrikvincent 0:05ccbd4f84f1 202 {
hendrikvincent 0:05ccbd4f84f1 203 des_cblock des_key;
hendrikvincent 0:05ccbd4f84f1 204 des_key_schedule key_schedule;
hendrikvincent 0:05ccbd4f84f1 205
hendrikvincent 0:05ccbd4f84f1 206 MakeKey(key, des_key);
hendrikvincent 0:05ccbd4f84f1 207
hendrikvincent 0:05ccbd4f84f1 208 des_set_key(&des_key, key_schedule);
hendrikvincent 0:05ccbd4f84f1 209
hendrikvincent 0:05ccbd4f84f1 210 #if 0
hendrikvincent 0:05ccbd4f84f1 211 CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X\n",
hendrikvincent 0:05ccbd4f84f1 212 clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7]));
hendrikvincent 0:05ccbd4f84f1 213 #endif
hendrikvincent 0:05ccbd4f84f1 214
hendrikvincent 0:05ccbd4f84f1 215 des_ecb_encrypt((des_cblock *)clear, (des_cblock *)cipher, key_schedule, 1);
hendrikvincent 0:05ccbd4f84f1 216
hendrikvincent 0:05ccbd4f84f1 217 #if 0
hendrikvincent 0:05ccbd4f84f1 218 CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
hendrikvincent 0:05ccbd4f84f1 219 cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7]));
hendrikvincent 0:05ccbd4f84f1 220 #endif
hendrikvincent 0:05ccbd4f84f1 221 }
hendrikvincent 0:05ccbd4f84f1 222
hendrikvincent 0:05ccbd4f84f1 223 #endif /* USE_CRYPT */
hendrikvincent 0:05ccbd4f84f1 224
hendrikvincent 0:05ccbd4f84f1 225
hendrikvincent 0:05ccbd4f84f1 226 static u_char
hendrikvincent 0:05ccbd4f84f1 227 Get7Bits( u_char *input, int startBit)
hendrikvincent 0:05ccbd4f84f1 228 {
hendrikvincent 0:05ccbd4f84f1 229 register unsigned int word;
hendrikvincent 0:05ccbd4f84f1 230
hendrikvincent 0:05ccbd4f84f1 231 word = (unsigned)input[startBit / 8] << 8;
hendrikvincent 0:05ccbd4f84f1 232 word |= (unsigned)input[startBit / 8 + 1];
hendrikvincent 0:05ccbd4f84f1 233
hendrikvincent 0:05ccbd4f84f1 234 word >>= 15 - (startBit % 8 + 7);
hendrikvincent 0:05ccbd4f84f1 235
hendrikvincent 0:05ccbd4f84f1 236 return word & 0xFE;
hendrikvincent 0:05ccbd4f84f1 237 }
hendrikvincent 0:05ccbd4f84f1 238
hendrikvincent 0:05ccbd4f84f1 239 #ifdef USE_CRYPT
hendrikvincent 0:05ccbd4f84f1 240
hendrikvincent 0:05ccbd4f84f1 241 /* in == 8-byte string (expanded version of the 56-bit key)
hendrikvincent 0:05ccbd4f84f1 242 * out == 64-byte string where each byte is either 1 or 0
hendrikvincent 0:05ccbd4f84f1 243 * Note that the low-order "bit" is always ignored by by setkey()
hendrikvincent 0:05ccbd4f84f1 244 */
hendrikvincent 0:05ccbd4f84f1 245 static void
hendrikvincent 0:05ccbd4f84f1 246 Expand(u_char *in, u_char *out)
hendrikvincent 0:05ccbd4f84f1 247 {
hendrikvincent 0:05ccbd4f84f1 248 int j, c;
hendrikvincent 0:05ccbd4f84f1 249 int i;
hendrikvincent 0:05ccbd4f84f1 250
hendrikvincent 0:05ccbd4f84f1 251 for(i = 0; i < 64; in++){
hendrikvincent 0:05ccbd4f84f1 252 c = *in;
hendrikvincent 0:05ccbd4f84f1 253 for(j = 7; j >= 0; j--) {
hendrikvincent 0:05ccbd4f84f1 254 *out++ = (c >> j) & 01;
hendrikvincent 0:05ccbd4f84f1 255 }
hendrikvincent 0:05ccbd4f84f1 256 i += 8;
hendrikvincent 0:05ccbd4f84f1 257 }
hendrikvincent 0:05ccbd4f84f1 258 }
hendrikvincent 0:05ccbd4f84f1 259
hendrikvincent 0:05ccbd4f84f1 260 /* The inverse of Expand
hendrikvincent 0:05ccbd4f84f1 261 */
hendrikvincent 0:05ccbd4f84f1 262 static void
hendrikvincent 0:05ccbd4f84f1 263 Collapse(u_char *in, u_char *out)
hendrikvincent 0:05ccbd4f84f1 264 {
hendrikvincent 0:05ccbd4f84f1 265 int j;
hendrikvincent 0:05ccbd4f84f1 266 int i;
hendrikvincent 0:05ccbd4f84f1 267 unsigned int c;
hendrikvincent 0:05ccbd4f84f1 268
hendrikvincent 0:05ccbd4f84f1 269 for (i = 0; i < 64; i += 8, out++) {
hendrikvincent 0:05ccbd4f84f1 270 c = 0;
hendrikvincent 0:05ccbd4f84f1 271 for (j = 7; j >= 0; j--, in++) {
hendrikvincent 0:05ccbd4f84f1 272 c |= *in << j;
hendrikvincent 0:05ccbd4f84f1 273 }
hendrikvincent 0:05ccbd4f84f1 274 *out = c & 0xff;
hendrikvincent 0:05ccbd4f84f1 275 }
hendrikvincent 0:05ccbd4f84f1 276 }
hendrikvincent 0:05ccbd4f84f1 277 #endif
hendrikvincent 0:05ccbd4f84f1 278
hendrikvincent 0:05ccbd4f84f1 279 static void
hendrikvincent 0:05ccbd4f84f1 280 MakeKey( u_char *key, /* IN 56 bit DES key missing parity bits */
hendrikvincent 0:05ccbd4f84f1 281 u_char *des_key /* OUT 64 bit DES key with parity bits added */)
hendrikvincent 0:05ccbd4f84f1 282 {
hendrikvincent 0:05ccbd4f84f1 283 des_key[0] = Get7Bits(key, 0);
hendrikvincent 0:05ccbd4f84f1 284 des_key[1] = Get7Bits(key, 7);
hendrikvincent 0:05ccbd4f84f1 285 des_key[2] = Get7Bits(key, 14);
hendrikvincent 0:05ccbd4f84f1 286 des_key[3] = Get7Bits(key, 21);
hendrikvincent 0:05ccbd4f84f1 287 des_key[4] = Get7Bits(key, 28);
hendrikvincent 0:05ccbd4f84f1 288 des_key[5] = Get7Bits(key, 35);
hendrikvincent 0:05ccbd4f84f1 289 des_key[6] = Get7Bits(key, 42);
hendrikvincent 0:05ccbd4f84f1 290 des_key[7] = Get7Bits(key, 49);
hendrikvincent 0:05ccbd4f84f1 291
hendrikvincent 0:05ccbd4f84f1 292 #ifndef USE_CRYPT
hendrikvincent 0:05ccbd4f84f1 293 des_set_odd_parity((des_cblock *)des_key);
hendrikvincent 0:05ccbd4f84f1 294 #endif
hendrikvincent 0:05ccbd4f84f1 295
hendrikvincent 0:05ccbd4f84f1 296 #if 0
hendrikvincent 0:05ccbd4f84f1 297 CHAPDEBUG(LOG_INFO, ("MakeKey: 56-bit input : %02X%02X%02X%02X%02X%02X%02X\n",
hendrikvincent 0:05ccbd4f84f1 298 key[0], key[1], key[2], key[3], key[4], key[5], key[6]));
hendrikvincent 0:05ccbd4f84f1 299 CHAPDEBUG(LOG_INFO, ("MakeKey: 64-bit output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
hendrikvincent 0:05ccbd4f84f1 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]));
hendrikvincent 0:05ccbd4f84f1 301 #endif
hendrikvincent 0:05ccbd4f84f1 302 }
hendrikvincent 0:05ccbd4f84f1 303
hendrikvincent 0:05ccbd4f84f1 304 static void
hendrikvincent 0:05ccbd4f84f1 305 ChapMS_NT( char *rchallenge,
hendrikvincent 0:05ccbd4f84f1 306 int rchallenge_len,
hendrikvincent 0:05ccbd4f84f1 307 char *secret,
hendrikvincent 0:05ccbd4f84f1 308 int secret_len,
hendrikvincent 0:05ccbd4f84f1 309 MS_ChapResponse *response)
hendrikvincent 0:05ccbd4f84f1 310 {
hendrikvincent 0:05ccbd4f84f1 311 int i;
hendrikvincent 0:05ccbd4f84f1 312 MDstruct md4Context;
hendrikvincent 0:05ccbd4f84f1 313 u_char unicodePassword[MAX_NT_PASSWORD * 2];
hendrikvincent 0:05ccbd4f84f1 314 static int low_byte_first = -1;
hendrikvincent 0:05ccbd4f84f1 315
hendrikvincent 0:05ccbd4f84f1 316 LWIP_UNUSED_ARG(rchallenge_len);
hendrikvincent 0:05ccbd4f84f1 317
hendrikvincent 0:05ccbd4f84f1 318 /* Initialize the Unicode version of the secret (== password). */
hendrikvincent 0:05ccbd4f84f1 319 /* This implicitly supports 8-bit ISO8859/1 characters. */
hendrikvincent 0:05ccbd4f84f1 320 BZERO(unicodePassword, sizeof(unicodePassword));
hendrikvincent 0:05ccbd4f84f1 321 for (i = 0; i < secret_len; i++) {
hendrikvincent 0:05ccbd4f84f1 322 unicodePassword[i * 2] = (u_char)secret[i];
hendrikvincent 0:05ccbd4f84f1 323 }
hendrikvincent 0:05ccbd4f84f1 324 MDbegin(&md4Context);
hendrikvincent 0:05ccbd4f84f1 325 MDupdate(&md4Context, unicodePassword, secret_len * 2 * 8); /* Unicode is 2 bytes/char, *8 for bit count */
hendrikvincent 0:05ccbd4f84f1 326
hendrikvincent 0:05ccbd4f84f1 327 if (low_byte_first == -1) {
hendrikvincent 0:05ccbd4f84f1 328 low_byte_first = (PP_HTONS((unsigned short int)1) != 1);
hendrikvincent 0:05ccbd4f84f1 329 }
hendrikvincent 0:05ccbd4f84f1 330 if (low_byte_first == 0) {
hendrikvincent 0:05ccbd4f84f1 331 /* @todo: arg type - u_long* or u_int* ? */
hendrikvincent 0:05ccbd4f84f1 332 MDreverse((unsigned int*)&md4Context); /* sfb 961105 */
hendrikvincent 0:05ccbd4f84f1 333 }
hendrikvincent 0:05ccbd4f84f1 334
hendrikvincent 0:05ccbd4f84f1 335 MDupdate(&md4Context, NULL, 0); /* Tell MD4 we're done */
hendrikvincent 0:05ccbd4f84f1 336
hendrikvincent 0:05ccbd4f84f1 337 ChallengeResponse((u_char*)rchallenge, (u_char*)md4Context.buffer, response->NTResp);
hendrikvincent 0:05ccbd4f84f1 338 }
hendrikvincent 0:05ccbd4f84f1 339
hendrikvincent 0:05ccbd4f84f1 340 #ifdef MSLANMAN
hendrikvincent 0:05ccbd4f84f1 341 static u_char *StdText = (u_char *)"KGS!@#$%"; /* key from rasapi32.dll */
hendrikvincent 0:05ccbd4f84f1 342
hendrikvincent 0:05ccbd4f84f1 343 static void
hendrikvincent 0:05ccbd4f84f1 344 ChapMS_LANMan( char *rchallenge,
hendrikvincent 0:05ccbd4f84f1 345 int rchallenge_len,
hendrikvincent 0:05ccbd4f84f1 346 char *secret,
hendrikvincent 0:05ccbd4f84f1 347 int secret_len,
hendrikvincent 0:05ccbd4f84f1 348 MS_ChapResponse *response)
hendrikvincent 0:05ccbd4f84f1 349 {
hendrikvincent 0:05ccbd4f84f1 350 int i;
hendrikvincent 0:05ccbd4f84f1 351 u_char UcasePassword[MAX_NT_PASSWORD]; /* max is actually 14 */
hendrikvincent 0:05ccbd4f84f1 352 u_char PasswordHash[16];
hendrikvincent 0:05ccbd4f84f1 353
hendrikvincent 0:05ccbd4f84f1 354 /* LANMan password is case insensitive */
hendrikvincent 0:05ccbd4f84f1 355 BZERO(UcasePassword, sizeof(UcasePassword));
hendrikvincent 0:05ccbd4f84f1 356 for (i = 0; i < secret_len; i++) {
hendrikvincent 0:05ccbd4f84f1 357 UcasePassword[i] = (u_char)toupper(secret[i]);
hendrikvincent 0:05ccbd4f84f1 358 }
hendrikvincent 0:05ccbd4f84f1 359 DesEncrypt( StdText, UcasePassword + 0, PasswordHash + 0 );
hendrikvincent 0:05ccbd4f84f1 360 DesEncrypt( StdText, UcasePassword + 7, PasswordHash + 8 );
hendrikvincent 0:05ccbd4f84f1 361 ChallengeResponse(rchallenge, PasswordHash, response->LANManResp);
hendrikvincent 0:05ccbd4f84f1 362 }
hendrikvincent 0:05ccbd4f84f1 363 #endif
hendrikvincent 0:05ccbd4f84f1 364
hendrikvincent 0:05ccbd4f84f1 365 void
hendrikvincent 0:05ccbd4f84f1 366 ChapMS( chap_state *cstate, char *rchallenge, int rchallenge_len, char *secret, int secret_len)
hendrikvincent 0:05ccbd4f84f1 367 {
hendrikvincent 0:05ccbd4f84f1 368 MS_ChapResponse response;
hendrikvincent 0:05ccbd4f84f1 369 #ifdef MSLANMAN
hendrikvincent 0:05ccbd4f84f1 370 extern int ms_lanman;
hendrikvincent 0:05ccbd4f84f1 371 #endif
hendrikvincent 0:05ccbd4f84f1 372
hendrikvincent 0:05ccbd4f84f1 373 #if 0
hendrikvincent 0:05ccbd4f84f1 374 CHAPDEBUG(LOG_INFO, ("ChapMS: secret is '%.*s'\n", secret_len, secret));
hendrikvincent 0:05ccbd4f84f1 375 #endif
hendrikvincent 0:05ccbd4f84f1 376 BZERO(&response, sizeof(response));
hendrikvincent 0:05ccbd4f84f1 377
hendrikvincent 0:05ccbd4f84f1 378 /* Calculate both always */
hendrikvincent 0:05ccbd4f84f1 379 ChapMS_NT(rchallenge, rchallenge_len, secret, secret_len, &response);
hendrikvincent 0:05ccbd4f84f1 380
hendrikvincent 0:05ccbd4f84f1 381 #ifdef MSLANMAN
hendrikvincent 0:05ccbd4f84f1 382 ChapMS_LANMan(rchallenge, rchallenge_len, secret, secret_len, &response);
hendrikvincent 0:05ccbd4f84f1 383
hendrikvincent 0:05ccbd4f84f1 384 /* prefered method is set by option */
hendrikvincent 0:05ccbd4f84f1 385 response.UseNT = !ms_lanman;
hendrikvincent 0:05ccbd4f84f1 386 #else
hendrikvincent 0:05ccbd4f84f1 387 response.UseNT = 1;
hendrikvincent 0:05ccbd4f84f1 388 #endif
hendrikvincent 0:05ccbd4f84f1 389
hendrikvincent 0:05ccbd4f84f1 390 BCOPY(&response, cstate->response, MS_CHAP_RESPONSE_LEN);
hendrikvincent 0:05ccbd4f84f1 391 cstate->resp_length = MS_CHAP_RESPONSE_LEN;
hendrikvincent 0:05ccbd4f84f1 392 }
hendrikvincent 0:05ccbd4f84f1 393
hendrikvincent 0:05ccbd4f84f1 394 #endif /* MSCHAP_SUPPORT */
hendrikvincent 0:05ccbd4f84f1 395
hendrikvincent 0:05ccbd4f84f1 396 #endif /* PPP_SUPPORT */