Nino Der Kinderen / Mbed 2 deprecated InetTest

Embedded C project:18/12/2014

Dependencies:   DS1307 TextLCD mbed

NetServices/lwip/netif/ppp/chap.c@0:8d87bc453349, 2014-12-18 (annotated)

Committer:
ninoderkinderen
Date:
Thu Dec 18 09:35:49 2014 +0000
Revision:
0:8d87bc453349
Programma embedded C

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ninoderkinderen 0:8d87bc453349 1 /*** WARNING - THIS HAS NEVER BEEN FINISHED ***/
ninoderkinderen 0:8d87bc453349 2 /*****************************************************************************
ninoderkinderen 0:8d87bc453349 3 * chap.c - Network Challenge Handshake Authentication Protocol program file.
ninoderkinderen 0:8d87bc453349 4 *
ninoderkinderen 0:8d87bc453349 5 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
ninoderkinderen 0:8d87bc453349 6 * portions Copyright (c) 1997 by Global Election Systems Inc.
ninoderkinderen 0:8d87bc453349 7 *
ninoderkinderen 0:8d87bc453349 8 * The authors hereby grant permission to use, copy, modify, distribute,
ninoderkinderen 0:8d87bc453349 9 * and license this software and its documentation for any purpose, provided
ninoderkinderen 0:8d87bc453349 10 * that existing copyright notices are retained in all copies and that this
ninoderkinderen 0:8d87bc453349 11 * notice and the following disclaimer are included verbatim in any
ninoderkinderen 0:8d87bc453349 12 * distributions. No written agreement, license, or royalty fee is required
ninoderkinderen 0:8d87bc453349 13 * for any of the authorized uses.
ninoderkinderen 0:8d87bc453349 14 *
ninoderkinderen 0:8d87bc453349 15 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
ninoderkinderen 0:8d87bc453349 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
ninoderkinderen 0:8d87bc453349 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
ninoderkinderen 0:8d87bc453349 18 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
ninoderkinderen 0:8d87bc453349 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
ninoderkinderen 0:8d87bc453349 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
ninoderkinderen 0:8d87bc453349 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
ninoderkinderen 0:8d87bc453349 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
ninoderkinderen 0:8d87bc453349 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
ninoderkinderen 0:8d87bc453349 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
ninoderkinderen 0:8d87bc453349 25 *
ninoderkinderen 0:8d87bc453349 26 ******************************************************************************
ninoderkinderen 0:8d87bc453349 27 * REVISION HISTORY
ninoderkinderen 0:8d87bc453349 28 *
ninoderkinderen 0:8d87bc453349 29 * 03-01-01 Marc Boucher <marc@mbsi.ca>
ninoderkinderen 0:8d87bc453349 30 * Ported to lwIP.
ninoderkinderen 0:8d87bc453349 31 * 97-12-04 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
ninoderkinderen 0:8d87bc453349 32 * Original based on BSD chap.c.
ninoderkinderen 0:8d87bc453349 33 *****************************************************************************/
ninoderkinderen 0:8d87bc453349 34 /*
ninoderkinderen 0:8d87bc453349 35 * chap.c - Challenge Handshake Authentication Protocol.
ninoderkinderen 0:8d87bc453349 36 *
ninoderkinderen 0:8d87bc453349 37 * Copyright (c) 1993 The Australian National University.
ninoderkinderen 0:8d87bc453349 38 * All rights reserved.
ninoderkinderen 0:8d87bc453349 39 *
ninoderkinderen 0:8d87bc453349 40 * Redistribution and use in source and binary forms are permitted
ninoderkinderen 0:8d87bc453349 41 * provided that the above copyright notice and this paragraph are
ninoderkinderen 0:8d87bc453349 42 * duplicated in all such forms and that any documentation,
ninoderkinderen 0:8d87bc453349 43 * advertising materials, and other materials related to such
ninoderkinderen 0:8d87bc453349 44 * distribution and use acknowledge that the software was developed
ninoderkinderen 0:8d87bc453349 45 * by the Australian National University. The name of the University
ninoderkinderen 0:8d87bc453349 46 * may not be used to endorse or promote products derived from this
ninoderkinderen 0:8d87bc453349 47 * software without specific prior written permission.
ninoderkinderen 0:8d87bc453349 48 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
ninoderkinderen 0:8d87bc453349 49 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
ninoderkinderen 0:8d87bc453349 50 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
ninoderkinderen 0:8d87bc453349 51 *
ninoderkinderen 0:8d87bc453349 52 * Copyright (c) 1991 Gregory M. Christy.
ninoderkinderen 0:8d87bc453349 53 * All rights reserved.
ninoderkinderen 0:8d87bc453349 54 *
ninoderkinderen 0:8d87bc453349 55 * Redistribution and use in source and binary forms are permitted
ninoderkinderen 0:8d87bc453349 56 * provided that the above copyright notice and this paragraph are
ninoderkinderen 0:8d87bc453349 57 * duplicated in all such forms and that any documentation,
ninoderkinderen 0:8d87bc453349 58 * advertising materials, and other materials related to such
ninoderkinderen 0:8d87bc453349 59 * distribution and use acknowledge that the software was developed
ninoderkinderen 0:8d87bc453349 60 * by Gregory M. Christy. The name of the author may not be used to
ninoderkinderen 0:8d87bc453349 61 * endorse or promote products derived from this software without
ninoderkinderen 0:8d87bc453349 62 * specific prior written permission.
ninoderkinderen 0:8d87bc453349 63 *
ninoderkinderen 0:8d87bc453349 64 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
ninoderkinderen 0:8d87bc453349 65 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
ninoderkinderen 0:8d87bc453349 66 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
ninoderkinderen 0:8d87bc453349 67 */
ninoderkinderen 0:8d87bc453349 68
ninoderkinderen 0:8d87bc453349 69 #include "lwip/opt.h"
ninoderkinderen 0:8d87bc453349 70
ninoderkinderen 0:8d87bc453349 71 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
ninoderkinderen 0:8d87bc453349 72
ninoderkinderen 0:8d87bc453349 73 #if CHAP_SUPPORT /* don't build if not configured for use in lwipopts.h */
ninoderkinderen 0:8d87bc453349 74
ninoderkinderen 0:8d87bc453349 75 #include "ppp.h"
ninoderkinderen 0:8d87bc453349 76 #include "pppdebug.h"
ninoderkinderen 0:8d87bc453349 77
ninoderkinderen 0:8d87bc453349 78 #include "magic.h"
ninoderkinderen 0:8d87bc453349 79 #include "randm.h"
ninoderkinderen 0:8d87bc453349 80 #include "auth.h"
ninoderkinderen 0:8d87bc453349 81 #include "md5.h"
ninoderkinderen 0:8d87bc453349 82 #include "chap.h"
ninoderkinderen 0:8d87bc453349 83 #include "chpms.h"
ninoderkinderen 0:8d87bc453349 84
ninoderkinderen 0:8d87bc453349 85 #include <string.h>
ninoderkinderen 0:8d87bc453349 86
ninoderkinderen 0:8d87bc453349 87 #if 0 /* UNUSED */
ninoderkinderen 0:8d87bc453349 88 /*
ninoderkinderen 0:8d87bc453349 89 * Command-line options.
ninoderkinderen 0:8d87bc453349 90 */
ninoderkinderen 0:8d87bc453349 91 static option_t chap_option_list[] = {
ninoderkinderen 0:8d87bc453349 92 { "chap-restart", o_int, &chap[0].timeouttime,
ninoderkinderen 0:8d87bc453349 93 "Set timeout for CHAP" },
ninoderkinderen 0:8d87bc453349 94 { "chap-max-challenge", o_int, &chap[0].max_transmits,
ninoderkinderen 0:8d87bc453349 95 "Set max #xmits for challenge" },
ninoderkinderen 0:8d87bc453349 96 { "chap-interval", o_int, &chap[0].chal_interval,
ninoderkinderen 0:8d87bc453349 97 "Set interval for rechallenge" },
ninoderkinderen 0:8d87bc453349 98 #ifdef MSLANMAN
ninoderkinderen 0:8d87bc453349 99 { "ms-lanman", o_bool, &ms_lanman,
ninoderkinderen 0:8d87bc453349 100 "Use LanMan passwd when using MS-CHAP", 1 },
ninoderkinderen 0:8d87bc453349 101 #endif
ninoderkinderen 0:8d87bc453349 102 { NULL }
ninoderkinderen 0:8d87bc453349 103 };
ninoderkinderen 0:8d87bc453349 104 #endif /* UNUSED */
ninoderkinderen 0:8d87bc453349 105
ninoderkinderen 0:8d87bc453349 106 /*
ninoderkinderen 0:8d87bc453349 107 * Protocol entry points.
ninoderkinderen 0:8d87bc453349 108 */
ninoderkinderen 0:8d87bc453349 109 static void ChapInit (int);
ninoderkinderen 0:8d87bc453349 110 static void ChapLowerUp (int);
ninoderkinderen 0:8d87bc453349 111 static void ChapLowerDown (int);
ninoderkinderen 0:8d87bc453349 112 static void ChapInput (int, u_char *, int);
ninoderkinderen 0:8d87bc453349 113 static void ChapProtocolReject (int);
ninoderkinderen 0:8d87bc453349 114 #if PPP_ADDITIONAL_CALLBACKS
ninoderkinderen 0:8d87bc453349 115 static int ChapPrintPkt (u_char *, int, void (*) (void *, char *, ...), void *);
ninoderkinderen 0:8d87bc453349 116 #endif
ninoderkinderen 0:8d87bc453349 117
ninoderkinderen 0:8d87bc453349 118 struct protent chap_protent = {
ninoderkinderen 0:8d87bc453349 119 PPP_CHAP,
ninoderkinderen 0:8d87bc453349 120 ChapInit,
ninoderkinderen 0:8d87bc453349 121 ChapInput,
ninoderkinderen 0:8d87bc453349 122 ChapProtocolReject,
ninoderkinderen 0:8d87bc453349 123 ChapLowerUp,
ninoderkinderen 0:8d87bc453349 124 ChapLowerDown,
ninoderkinderen 0:8d87bc453349 125 NULL,
ninoderkinderen 0:8d87bc453349 126 NULL,
ninoderkinderen 0:8d87bc453349 127 #if PPP_ADDITIONAL_CALLBACKS
ninoderkinderen 0:8d87bc453349 128 ChapPrintPkt,
ninoderkinderen 0:8d87bc453349 129 NULL,
ninoderkinderen 0:8d87bc453349 130 #endif /* PPP_ADDITIONAL_CALLBACKS */
ninoderkinderen 0:8d87bc453349 131 1,
ninoderkinderen 0:8d87bc453349 132 "CHAP",
ninoderkinderen 0:8d87bc453349 133 #if PPP_ADDITIONAL_CALLBACKS
ninoderkinderen 0:8d87bc453349 134 NULL,
ninoderkinderen 0:8d87bc453349 135 NULL,
ninoderkinderen 0:8d87bc453349 136 NULL
ninoderkinderen 0:8d87bc453349 137 #endif /* PPP_ADDITIONAL_CALLBACKS */
ninoderkinderen 0:8d87bc453349 138 };
ninoderkinderen 0:8d87bc453349 139
ninoderkinderen 0:8d87bc453349 140 chap_state chap[NUM_PPP]; /* CHAP state; one for each unit */
ninoderkinderen 0:8d87bc453349 141
ninoderkinderen 0:8d87bc453349 142 static void ChapChallengeTimeout (void *);
ninoderkinderen 0:8d87bc453349 143 static void ChapResponseTimeout (void *);
ninoderkinderen 0:8d87bc453349 144 static void ChapReceiveChallenge (chap_state *, u_char *, u_char, int);
ninoderkinderen 0:8d87bc453349 145 static void ChapRechallenge (void *);
ninoderkinderen 0:8d87bc453349 146 static void ChapReceiveResponse (chap_state *, u_char *, int, int);
ninoderkinderen 0:8d87bc453349 147 static void ChapReceiveSuccess(chap_state *cstate, u_char *inp, u_char id, int len);
ninoderkinderen 0:8d87bc453349 148 static void ChapReceiveFailure(chap_state *cstate, u_char *inp, u_char id, int len);
ninoderkinderen 0:8d87bc453349 149 static void ChapSendStatus (chap_state *, int);
ninoderkinderen 0:8d87bc453349 150 static void ChapSendChallenge (chap_state *);
ninoderkinderen 0:8d87bc453349 151 static void ChapSendResponse (chap_state *);
ninoderkinderen 0:8d87bc453349 152 static void ChapGenChallenge (chap_state *);
ninoderkinderen 0:8d87bc453349 153
ninoderkinderen 0:8d87bc453349 154 /*
ninoderkinderen 0:8d87bc453349 155 * ChapInit - Initialize a CHAP unit.
ninoderkinderen 0:8d87bc453349 156 */
ninoderkinderen 0:8d87bc453349 157 static void
ninoderkinderen 0:8d87bc453349 158 ChapInit(int unit)
ninoderkinderen 0:8d87bc453349 159 {
ninoderkinderen 0:8d87bc453349 160 chap_state *cstate = &chap[unit];
ninoderkinderen 0:8d87bc453349 161
ninoderkinderen 0:8d87bc453349 162 BZERO(cstate, sizeof(*cstate));
ninoderkinderen 0:8d87bc453349 163 cstate->unit = unit;
ninoderkinderen 0:8d87bc453349 164 cstate->clientstate = CHAPCS_INITIAL;
ninoderkinderen 0:8d87bc453349 165 cstate->serverstate = CHAPSS_INITIAL;
ninoderkinderen 0:8d87bc453349 166 cstate->timeouttime = CHAP_DEFTIMEOUT;
ninoderkinderen 0:8d87bc453349 167 cstate->max_transmits = CHAP_DEFTRANSMITS;
ninoderkinderen 0:8d87bc453349 168 /* random number generator is initialized in magic_init */
ninoderkinderen 0:8d87bc453349 169 }
ninoderkinderen 0:8d87bc453349 170
ninoderkinderen 0:8d87bc453349 171
ninoderkinderen 0:8d87bc453349 172 /*
ninoderkinderen 0:8d87bc453349 173 * ChapAuthWithPeer - Authenticate us with our peer (start client).
ninoderkinderen 0:8d87bc453349 174 *
ninoderkinderen 0:8d87bc453349 175 */
ninoderkinderen 0:8d87bc453349 176 void
ninoderkinderen 0:8d87bc453349 177 ChapAuthWithPeer(int unit, char *our_name, u_char digest)
ninoderkinderen 0:8d87bc453349 178 {
ninoderkinderen 0:8d87bc453349 179 chap_state *cstate = &chap[unit];
ninoderkinderen 0:8d87bc453349 180
ninoderkinderen 0:8d87bc453349 181 cstate->resp_name = our_name;
ninoderkinderen 0:8d87bc453349 182 cstate->resp_type = digest;
ninoderkinderen 0:8d87bc453349 183
ninoderkinderen 0:8d87bc453349 184 if (cstate->clientstate == CHAPCS_INITIAL ||
ninoderkinderen 0:8d87bc453349 185 cstate->clientstate == CHAPCS_PENDING) {
ninoderkinderen 0:8d87bc453349 186 /* lower layer isn't up - wait until later */
ninoderkinderen 0:8d87bc453349 187 cstate->clientstate = CHAPCS_PENDING;
ninoderkinderen 0:8d87bc453349 188 return;
ninoderkinderen 0:8d87bc453349 189 }
ninoderkinderen 0:8d87bc453349 190
ninoderkinderen 0:8d87bc453349 191 /*
ninoderkinderen 0:8d87bc453349 192 * We get here as a result of LCP coming up.
ninoderkinderen 0:8d87bc453349 193 * So even if CHAP was open before, we will
ninoderkinderen 0:8d87bc453349 194 * have to re-authenticate ourselves.
ninoderkinderen 0:8d87bc453349 195 */
ninoderkinderen 0:8d87bc453349 196 cstate->clientstate = CHAPCS_LISTEN;
ninoderkinderen 0:8d87bc453349 197 }
ninoderkinderen 0:8d87bc453349 198
ninoderkinderen 0:8d87bc453349 199
ninoderkinderen 0:8d87bc453349 200 /*
ninoderkinderen 0:8d87bc453349 201 * ChapAuthPeer - Authenticate our peer (start server).
ninoderkinderen 0:8d87bc453349 202 */
ninoderkinderen 0:8d87bc453349 203 void
ninoderkinderen 0:8d87bc453349 204 ChapAuthPeer(int unit, char *our_name, u_char digest)
ninoderkinderen 0:8d87bc453349 205 {
ninoderkinderen 0:8d87bc453349 206 chap_state *cstate = &chap[unit];
ninoderkinderen 0:8d87bc453349 207
ninoderkinderen 0:8d87bc453349 208 cstate->chal_name = our_name;
ninoderkinderen 0:8d87bc453349 209 cstate->chal_type = digest;
ninoderkinderen 0:8d87bc453349 210
ninoderkinderen 0:8d87bc453349 211 if (cstate->serverstate == CHAPSS_INITIAL ||
ninoderkinderen 0:8d87bc453349 212 cstate->serverstate == CHAPSS_PENDING) {
ninoderkinderen 0:8d87bc453349 213 /* lower layer isn't up - wait until later */
ninoderkinderen 0:8d87bc453349 214 cstate->serverstate = CHAPSS_PENDING;
ninoderkinderen 0:8d87bc453349 215 return;
ninoderkinderen 0:8d87bc453349 216 }
ninoderkinderen 0:8d87bc453349 217
ninoderkinderen 0:8d87bc453349 218 ChapGenChallenge(cstate);
ninoderkinderen 0:8d87bc453349 219 ChapSendChallenge(cstate); /* crank it up dude! */
ninoderkinderen 0:8d87bc453349 220 cstate->serverstate = CHAPSS_INITIAL_CHAL;
ninoderkinderen 0:8d87bc453349 221 }
ninoderkinderen 0:8d87bc453349 222
ninoderkinderen 0:8d87bc453349 223
ninoderkinderen 0:8d87bc453349 224 /*
ninoderkinderen 0:8d87bc453349 225 * ChapChallengeTimeout - Timeout expired on sending challenge.
ninoderkinderen 0:8d87bc453349 226 */
ninoderkinderen 0:8d87bc453349 227 static void
ninoderkinderen 0:8d87bc453349 228 ChapChallengeTimeout(void *arg)
ninoderkinderen 0:8d87bc453349 229 {
ninoderkinderen 0:8d87bc453349 230 chap_state *cstate = (chap_state *) arg;
ninoderkinderen 0:8d87bc453349 231
ninoderkinderen 0:8d87bc453349 232 /* if we aren't sending challenges, don't worry. then again we */
ninoderkinderen 0:8d87bc453349 233 /* probably shouldn't be here either */
ninoderkinderen 0:8d87bc453349 234 if (cstate->serverstate != CHAPSS_INITIAL_CHAL &&
ninoderkinderen 0:8d87bc453349 235 cstate->serverstate != CHAPSS_RECHALLENGE) {
ninoderkinderen 0:8d87bc453349 236 return;
ninoderkinderen 0:8d87bc453349 237 }
ninoderkinderen 0:8d87bc453349 238
ninoderkinderen 0:8d87bc453349 239 if (cstate->chal_transmits >= cstate->max_transmits) {
ninoderkinderen 0:8d87bc453349 240 /* give up on peer */
ninoderkinderen 0:8d87bc453349 241 CHAPDEBUG(LOG_ERR, ("Peer failed to respond to CHAP challenge\n"));
ninoderkinderen 0:8d87bc453349 242 cstate->serverstate = CHAPSS_BADAUTH;
ninoderkinderen 0:8d87bc453349 243 auth_peer_fail(cstate->unit, PPP_CHAP);
ninoderkinderen 0:8d87bc453349 244 return;
ninoderkinderen 0:8d87bc453349 245 }
ninoderkinderen 0:8d87bc453349 246
ninoderkinderen 0:8d87bc453349 247 ChapSendChallenge(cstate); /* Re-send challenge */
ninoderkinderen 0:8d87bc453349 248 }
ninoderkinderen 0:8d87bc453349 249
ninoderkinderen 0:8d87bc453349 250
ninoderkinderen 0:8d87bc453349 251 /*
ninoderkinderen 0:8d87bc453349 252 * ChapResponseTimeout - Timeout expired on sending response.
ninoderkinderen 0:8d87bc453349 253 */
ninoderkinderen 0:8d87bc453349 254 static void
ninoderkinderen 0:8d87bc453349 255 ChapResponseTimeout(void *arg)
ninoderkinderen 0:8d87bc453349 256 {
ninoderkinderen 0:8d87bc453349 257 chap_state *cstate = (chap_state *) arg;
ninoderkinderen 0:8d87bc453349 258
ninoderkinderen 0:8d87bc453349 259 /* if we aren't sending a response, don't worry. */
ninoderkinderen 0:8d87bc453349 260 if (cstate->clientstate != CHAPCS_RESPONSE) {
ninoderkinderen 0:8d87bc453349 261 return;
ninoderkinderen 0:8d87bc453349 262 }
ninoderkinderen 0:8d87bc453349 263
ninoderkinderen 0:8d87bc453349 264 ChapSendResponse(cstate); /* re-send response */
ninoderkinderen 0:8d87bc453349 265 }
ninoderkinderen 0:8d87bc453349 266
ninoderkinderen 0:8d87bc453349 267
ninoderkinderen 0:8d87bc453349 268 /*
ninoderkinderen 0:8d87bc453349 269 * ChapRechallenge - Time to challenge the peer again.
ninoderkinderen 0:8d87bc453349 270 */
ninoderkinderen 0:8d87bc453349 271 static void
ninoderkinderen 0:8d87bc453349 272 ChapRechallenge(void *arg)
ninoderkinderen 0:8d87bc453349 273 {
ninoderkinderen 0:8d87bc453349 274 chap_state *cstate = (chap_state *) arg;
ninoderkinderen 0:8d87bc453349 275
ninoderkinderen 0:8d87bc453349 276 /* if we aren't sending a response, don't worry. */
ninoderkinderen 0:8d87bc453349 277 if (cstate->serverstate != CHAPSS_OPEN) {
ninoderkinderen 0:8d87bc453349 278 return;
ninoderkinderen 0:8d87bc453349 279 }
ninoderkinderen 0:8d87bc453349 280
ninoderkinderen 0:8d87bc453349 281 ChapGenChallenge(cstate);
ninoderkinderen 0:8d87bc453349 282 ChapSendChallenge(cstate);
ninoderkinderen 0:8d87bc453349 283 cstate->serverstate = CHAPSS_RECHALLENGE;
ninoderkinderen 0:8d87bc453349 284 }
ninoderkinderen 0:8d87bc453349 285
ninoderkinderen 0:8d87bc453349 286
ninoderkinderen 0:8d87bc453349 287 /*
ninoderkinderen 0:8d87bc453349 288 * ChapLowerUp - The lower layer is up.
ninoderkinderen 0:8d87bc453349 289 *
ninoderkinderen 0:8d87bc453349 290 * Start up if we have pending requests.
ninoderkinderen 0:8d87bc453349 291 */
ninoderkinderen 0:8d87bc453349 292 static void
ninoderkinderen 0:8d87bc453349 293 ChapLowerUp(int unit)
ninoderkinderen 0:8d87bc453349 294 {
ninoderkinderen 0:8d87bc453349 295 chap_state *cstate = &chap[unit];
ninoderkinderen 0:8d87bc453349 296
ninoderkinderen 0:8d87bc453349 297 if (cstate->clientstate == CHAPCS_INITIAL) {
ninoderkinderen 0:8d87bc453349 298 cstate->clientstate = CHAPCS_CLOSED;
ninoderkinderen 0:8d87bc453349 299 } else if (cstate->clientstate == CHAPCS_PENDING) {
ninoderkinderen 0:8d87bc453349 300 cstate->clientstate = CHAPCS_LISTEN;
ninoderkinderen 0:8d87bc453349 301 }
ninoderkinderen 0:8d87bc453349 302
ninoderkinderen 0:8d87bc453349 303 if (cstate->serverstate == CHAPSS_INITIAL) {
ninoderkinderen 0:8d87bc453349 304 cstate->serverstate = CHAPSS_CLOSED;
ninoderkinderen 0:8d87bc453349 305 } else if (cstate->serverstate == CHAPSS_PENDING) {
ninoderkinderen 0:8d87bc453349 306 ChapGenChallenge(cstate);
ninoderkinderen 0:8d87bc453349 307 ChapSendChallenge(cstate);
ninoderkinderen 0:8d87bc453349 308 cstate->serverstate = CHAPSS_INITIAL_CHAL;
ninoderkinderen 0:8d87bc453349 309 }
ninoderkinderen 0:8d87bc453349 310 }
ninoderkinderen 0:8d87bc453349 311
ninoderkinderen 0:8d87bc453349 312
ninoderkinderen 0:8d87bc453349 313 /*
ninoderkinderen 0:8d87bc453349 314 * ChapLowerDown - The lower layer is down.
ninoderkinderen 0:8d87bc453349 315 *
ninoderkinderen 0:8d87bc453349 316 * Cancel all timeouts.
ninoderkinderen 0:8d87bc453349 317 */
ninoderkinderen 0:8d87bc453349 318 static void
ninoderkinderen 0:8d87bc453349 319 ChapLowerDown(int unit)
ninoderkinderen 0:8d87bc453349 320 {
ninoderkinderen 0:8d87bc453349 321 chap_state *cstate = &chap[unit];
ninoderkinderen 0:8d87bc453349 322
ninoderkinderen 0:8d87bc453349 323 /* Timeout(s) pending? Cancel if so. */
ninoderkinderen 0:8d87bc453349 324 if (cstate->serverstate == CHAPSS_INITIAL_CHAL ||
ninoderkinderen 0:8d87bc453349 325 cstate->serverstate == CHAPSS_RECHALLENGE) {
ninoderkinderen 0:8d87bc453349 326 UNTIMEOUT(ChapChallengeTimeout, cstate);
ninoderkinderen 0:8d87bc453349 327 } else if (cstate->serverstate == CHAPSS_OPEN
ninoderkinderen 0:8d87bc453349 328 && cstate->chal_interval != 0) {
ninoderkinderen 0:8d87bc453349 329 UNTIMEOUT(ChapRechallenge, cstate);
ninoderkinderen 0:8d87bc453349 330 }
ninoderkinderen 0:8d87bc453349 331 if (cstate->clientstate == CHAPCS_RESPONSE) {
ninoderkinderen 0:8d87bc453349 332 UNTIMEOUT(ChapResponseTimeout, cstate);
ninoderkinderen 0:8d87bc453349 333 }
ninoderkinderen 0:8d87bc453349 334 cstate->clientstate = CHAPCS_INITIAL;
ninoderkinderen 0:8d87bc453349 335 cstate->serverstate = CHAPSS_INITIAL;
ninoderkinderen 0:8d87bc453349 336 }
ninoderkinderen 0:8d87bc453349 337
ninoderkinderen 0:8d87bc453349 338
ninoderkinderen 0:8d87bc453349 339 /*
ninoderkinderen 0:8d87bc453349 340 * ChapProtocolReject - Peer doesn't grok CHAP.
ninoderkinderen 0:8d87bc453349 341 */
ninoderkinderen 0:8d87bc453349 342 static void
ninoderkinderen 0:8d87bc453349 343 ChapProtocolReject(int unit)
ninoderkinderen 0:8d87bc453349 344 {
ninoderkinderen 0:8d87bc453349 345 chap_state *cstate = &chap[unit];
ninoderkinderen 0:8d87bc453349 346
ninoderkinderen 0:8d87bc453349 347 if (cstate->serverstate != CHAPSS_INITIAL &&
ninoderkinderen 0:8d87bc453349 348 cstate->serverstate != CHAPSS_CLOSED) {
ninoderkinderen 0:8d87bc453349 349 auth_peer_fail(unit, PPP_CHAP);
ninoderkinderen 0:8d87bc453349 350 }
ninoderkinderen 0:8d87bc453349 351 if (cstate->clientstate != CHAPCS_INITIAL &&
ninoderkinderen 0:8d87bc453349 352 cstate->clientstate != CHAPCS_CLOSED) {
ninoderkinderen 0:8d87bc453349 353 auth_withpeer_fail(unit, PPP_CHAP); /* lwip: just sets the PPP error code on this unit to PPPERR_AUTHFAIL */
ninoderkinderen 0:8d87bc453349 354 }
ninoderkinderen 0:8d87bc453349 355 ChapLowerDown(unit); /* shutdown chap */
ninoderkinderen 0:8d87bc453349 356 }
ninoderkinderen 0:8d87bc453349 357
ninoderkinderen 0:8d87bc453349 358
ninoderkinderen 0:8d87bc453349 359 /*
ninoderkinderen 0:8d87bc453349 360 * ChapInput - Input CHAP packet.
ninoderkinderen 0:8d87bc453349 361 */
ninoderkinderen 0:8d87bc453349 362 static void
ninoderkinderen 0:8d87bc453349 363 ChapInput(int unit, u_char *inpacket, int packet_len)
ninoderkinderen 0:8d87bc453349 364 {
ninoderkinderen 0:8d87bc453349 365 chap_state *cstate = &chap[unit];
ninoderkinderen 0:8d87bc453349 366 u_char *inp;
ninoderkinderen 0:8d87bc453349 367 u_char code, id;
ninoderkinderen 0:8d87bc453349 368 int len;
ninoderkinderen 0:8d87bc453349 369
ninoderkinderen 0:8d87bc453349 370 /*
ninoderkinderen 0:8d87bc453349 371 * Parse header (code, id and length).
ninoderkinderen 0:8d87bc453349 372 * If packet too short, drop it.
ninoderkinderen 0:8d87bc453349 373 */
ninoderkinderen 0:8d87bc453349 374 inp = inpacket;
ninoderkinderen 0:8d87bc453349 375 if (packet_len < CHAP_HEADERLEN) {
ninoderkinderen 0:8d87bc453349 376 CHAPDEBUG(LOG_INFO, ("ChapInput: rcvd short header.\n"));
ninoderkinderen 0:8d87bc453349 377 return;
ninoderkinderen 0:8d87bc453349 378 }
ninoderkinderen 0:8d87bc453349 379 GETCHAR(code, inp);
ninoderkinderen 0:8d87bc453349 380 GETCHAR(id, inp);
ninoderkinderen 0:8d87bc453349 381 GETSHORT(len, inp);
ninoderkinderen 0:8d87bc453349 382 if (len < CHAP_HEADERLEN) {
ninoderkinderen 0:8d87bc453349 383 CHAPDEBUG(LOG_INFO, ("ChapInput: rcvd illegal length.\n"));
ninoderkinderen 0:8d87bc453349 384 return;
ninoderkinderen 0:8d87bc453349 385 }
ninoderkinderen 0:8d87bc453349 386 if (len > packet_len) {
ninoderkinderen 0:8d87bc453349 387 CHAPDEBUG(LOG_INFO, ("ChapInput: rcvd short packet.\n"));
ninoderkinderen 0:8d87bc453349 388 return;
ninoderkinderen 0:8d87bc453349 389 }
ninoderkinderen 0:8d87bc453349 390 len -= CHAP_HEADERLEN;
ninoderkinderen 0:8d87bc453349 391
ninoderkinderen 0:8d87bc453349 392 /*
ninoderkinderen 0:8d87bc453349 393 * Action depends on code (as in fact it usually does :-).
ninoderkinderen 0:8d87bc453349 394 */
ninoderkinderen 0:8d87bc453349 395 switch (code) {
ninoderkinderen 0:8d87bc453349 396 case CHAP_CHALLENGE:
ninoderkinderen 0:8d87bc453349 397 ChapReceiveChallenge(cstate, inp, id, len);
ninoderkinderen 0:8d87bc453349 398 break;
ninoderkinderen 0:8d87bc453349 399
ninoderkinderen 0:8d87bc453349 400 case CHAP_RESPONSE:
ninoderkinderen 0:8d87bc453349 401 ChapReceiveResponse(cstate, inp, id, len);
ninoderkinderen 0:8d87bc453349 402 break;
ninoderkinderen 0:8d87bc453349 403
ninoderkinderen 0:8d87bc453349 404 case CHAP_FAILURE:
ninoderkinderen 0:8d87bc453349 405 ChapReceiveFailure(cstate, inp, id, len);
ninoderkinderen 0:8d87bc453349 406 break;
ninoderkinderen 0:8d87bc453349 407
ninoderkinderen 0:8d87bc453349 408 case CHAP_SUCCESS:
ninoderkinderen 0:8d87bc453349 409 ChapReceiveSuccess(cstate, inp, id, len);
ninoderkinderen 0:8d87bc453349 410 break;
ninoderkinderen 0:8d87bc453349 411
ninoderkinderen 0:8d87bc453349 412 default: /* Need code reject? */
ninoderkinderen 0:8d87bc453349 413 CHAPDEBUG(LOG_WARNING, ("Unknown CHAP code (%d) received.\n", code));
ninoderkinderen 0:8d87bc453349 414 break;
ninoderkinderen 0:8d87bc453349 415 }
ninoderkinderen 0:8d87bc453349 416 }
ninoderkinderen 0:8d87bc453349 417
ninoderkinderen 0:8d87bc453349 418
ninoderkinderen 0:8d87bc453349 419 /*
ninoderkinderen 0:8d87bc453349 420 * ChapReceiveChallenge - Receive Challenge and send Response.
ninoderkinderen 0:8d87bc453349 421 */
ninoderkinderen 0:8d87bc453349 422 static void
ninoderkinderen 0:8d87bc453349 423 ChapReceiveChallenge(chap_state *cstate, u_char *inp, u_char id, int len)
ninoderkinderen 0:8d87bc453349 424 {
ninoderkinderen 0:8d87bc453349 425 int rchallenge_len;
ninoderkinderen 0:8d87bc453349 426 u_char *rchallenge;
ninoderkinderen 0:8d87bc453349 427 int secret_len;
ninoderkinderen 0:8d87bc453349 428 char secret[MAXSECRETLEN];
ninoderkinderen 0:8d87bc453349 429 char rhostname[256];
ninoderkinderen 0:8d87bc453349 430 MD5_CTX mdContext;
ninoderkinderen 0:8d87bc453349 431 u_char hash[MD5_SIGNATURE_SIZE];
ninoderkinderen 0:8d87bc453349 432
ninoderkinderen 0:8d87bc453349 433 CHAPDEBUG(LOG_INFO, ("ChapReceiveChallenge: Rcvd id %d.\n", id));
ninoderkinderen 0:8d87bc453349 434 if (cstate->clientstate == CHAPCS_CLOSED ||
ninoderkinderen 0:8d87bc453349 435 cstate->clientstate == CHAPCS_PENDING) {
ninoderkinderen 0:8d87bc453349 436 CHAPDEBUG(LOG_INFO, ("ChapReceiveChallenge: in state %d\n",
ninoderkinderen 0:8d87bc453349 437 cstate->clientstate));
ninoderkinderen 0:8d87bc453349 438 return;
ninoderkinderen 0:8d87bc453349 439 }
ninoderkinderen 0:8d87bc453349 440
ninoderkinderen 0:8d87bc453349 441 if (len < 2) {
ninoderkinderen 0:8d87bc453349 442 CHAPDEBUG(LOG_INFO, ("ChapReceiveChallenge: rcvd short packet.\n"));
ninoderkinderen 0:8d87bc453349 443 return;
ninoderkinderen 0:8d87bc453349 444 }
ninoderkinderen 0:8d87bc453349 445
ninoderkinderen 0:8d87bc453349 446 GETCHAR(rchallenge_len, inp);
ninoderkinderen 0:8d87bc453349 447 len -= sizeof (u_char) + rchallenge_len; /* now name field length */
ninoderkinderen 0:8d87bc453349 448 if (len < 0) {
ninoderkinderen 0:8d87bc453349 449 CHAPDEBUG(LOG_INFO, ("ChapReceiveChallenge: rcvd short packet.\n"));
ninoderkinderen 0:8d87bc453349 450 return;
ninoderkinderen 0:8d87bc453349 451 }
ninoderkinderen 0:8d87bc453349 452 rchallenge = inp;
ninoderkinderen 0:8d87bc453349 453 INCPTR(rchallenge_len, inp);
ninoderkinderen 0:8d87bc453349 454
ninoderkinderen 0:8d87bc453349 455 if (len >= (int)sizeof(rhostname)) {
ninoderkinderen 0:8d87bc453349 456 len = sizeof(rhostname) - 1;
ninoderkinderen 0:8d87bc453349 457 }
ninoderkinderen 0:8d87bc453349 458 BCOPY(inp, rhostname, len);
ninoderkinderen 0:8d87bc453349 459 rhostname[len] = '\000';
ninoderkinderen 0:8d87bc453349 460
ninoderkinderen 0:8d87bc453349 461 CHAPDEBUG(LOG_INFO, ("ChapReceiveChallenge: received name field '%s'\n",
ninoderkinderen 0:8d87bc453349 462 rhostname));
ninoderkinderen 0:8d87bc453349 463
ninoderkinderen 0:8d87bc453349 464 /* Microsoft doesn't send their name back in the PPP packet */
ninoderkinderen 0:8d87bc453349 465 if (ppp_settings.remote_name[0] != 0 && (ppp_settings.explicit_remote || rhostname[0] == 0)) {
ninoderkinderen 0:8d87bc453349 466 strncpy(rhostname, ppp_settings.remote_name, sizeof(rhostname));
ninoderkinderen 0:8d87bc453349 467 rhostname[sizeof(rhostname) - 1] = 0;
ninoderkinderen 0:8d87bc453349 468 CHAPDEBUG(LOG_INFO, ("ChapReceiveChallenge: using '%s' as remote name\n",
ninoderkinderen 0:8d87bc453349 469 rhostname));
ninoderkinderen 0:8d87bc453349 470 }
ninoderkinderen 0:8d87bc453349 471
ninoderkinderen 0:8d87bc453349 472 /* get secret for authenticating ourselves with the specified host */
ninoderkinderen 0:8d87bc453349 473 if (!get_secret(cstate->unit, cstate->resp_name, rhostname,
ninoderkinderen 0:8d87bc453349 474 secret, &secret_len, 0)) {
ninoderkinderen 0:8d87bc453349 475 secret_len = 0; /* assume null secret if can't find one */
ninoderkinderen 0:8d87bc453349 476 CHAPDEBUG(LOG_WARNING, ("No CHAP secret found for authenticating us to %s\n",
ninoderkinderen 0:8d87bc453349 477 rhostname));
ninoderkinderen 0:8d87bc453349 478 }
ninoderkinderen 0:8d87bc453349 479
ninoderkinderen 0:8d87bc453349 480 /* cancel response send timeout if necessary */
ninoderkinderen 0:8d87bc453349 481 if (cstate->clientstate == CHAPCS_RESPONSE) {
ninoderkinderen 0:8d87bc453349 482 UNTIMEOUT(ChapResponseTimeout, cstate);
ninoderkinderen 0:8d87bc453349 483 }
ninoderkinderen 0:8d87bc453349 484
ninoderkinderen 0:8d87bc453349 485 cstate->resp_id = id;
ninoderkinderen 0:8d87bc453349 486 cstate->resp_transmits = 0;
ninoderkinderen 0:8d87bc453349 487
ninoderkinderen 0:8d87bc453349 488 /* generate MD based on negotiated type */
ninoderkinderen 0:8d87bc453349 489 switch (cstate->resp_type) {
ninoderkinderen 0:8d87bc453349 490
ninoderkinderen 0:8d87bc453349 491 case CHAP_DIGEST_MD5:
ninoderkinderen 0:8d87bc453349 492 MD5Init(&mdContext);
ninoderkinderen 0:8d87bc453349 493 MD5Update(&mdContext, &cstate->resp_id, 1);
ninoderkinderen 0:8d87bc453349 494 MD5Update(&mdContext, (u_char*)secret, secret_len);
ninoderkinderen 0:8d87bc453349 495 MD5Update(&mdContext, rchallenge, rchallenge_len);
ninoderkinderen 0:8d87bc453349 496 MD5Final(hash, &mdContext);
ninoderkinderen 0:8d87bc453349 497 BCOPY(hash, cstate->response, MD5_SIGNATURE_SIZE);
ninoderkinderen 0:8d87bc453349 498 cstate->resp_length = MD5_SIGNATURE_SIZE;
ninoderkinderen 0:8d87bc453349 499 break;
ninoderkinderen 0:8d87bc453349 500
ninoderkinderen 0:8d87bc453349 501 #if MSCHAP_SUPPORT
ninoderkinderen 0:8d87bc453349 502 case CHAP_MICROSOFT:
ninoderkinderen 0:8d87bc453349 503 ChapMS(cstate, rchallenge, rchallenge_len, secret, secret_len);
ninoderkinderen 0:8d87bc453349 504 break;
ninoderkinderen 0:8d87bc453349 505 #endif
ninoderkinderen 0:8d87bc453349 506
ninoderkinderen 0:8d87bc453349 507 default:
ninoderkinderen 0:8d87bc453349 508 CHAPDEBUG(LOG_INFO, ("unknown digest type %d\n", cstate->resp_type));
ninoderkinderen 0:8d87bc453349 509 return;
ninoderkinderen 0:8d87bc453349 510 }
ninoderkinderen 0:8d87bc453349 511
ninoderkinderen 0:8d87bc453349 512 BZERO(secret, sizeof(secret));
ninoderkinderen 0:8d87bc453349 513 ChapSendResponse(cstate);
ninoderkinderen 0:8d87bc453349 514 }
ninoderkinderen 0:8d87bc453349 515
ninoderkinderen 0:8d87bc453349 516
ninoderkinderen 0:8d87bc453349 517 /*
ninoderkinderen 0:8d87bc453349 518 * ChapReceiveResponse - Receive and process response.
ninoderkinderen 0:8d87bc453349 519 */
ninoderkinderen 0:8d87bc453349 520 static void
ninoderkinderen 0:8d87bc453349 521 ChapReceiveResponse(chap_state *cstate, u_char *inp, int id, int len)
ninoderkinderen 0:8d87bc453349 522 {
ninoderkinderen 0:8d87bc453349 523 u_char *remmd, remmd_len;
ninoderkinderen 0:8d87bc453349 524 int secret_len, old_state;
ninoderkinderen 0:8d87bc453349 525 int code;
ninoderkinderen 0:8d87bc453349 526 char rhostname[256];
ninoderkinderen 0:8d87bc453349 527 MD5_CTX mdContext;
ninoderkinderen 0:8d87bc453349 528 char secret[MAXSECRETLEN];
ninoderkinderen 0:8d87bc453349 529 u_char hash[MD5_SIGNATURE_SIZE];
ninoderkinderen 0:8d87bc453349 530
ninoderkinderen 0:8d87bc453349 531 CHAPDEBUG(LOG_INFO, ("ChapReceiveResponse: Rcvd id %d.\n", id));
ninoderkinderen 0:8d87bc453349 532
ninoderkinderen 0:8d87bc453349 533 if (cstate->serverstate == CHAPSS_CLOSED ||
ninoderkinderen 0:8d87bc453349 534 cstate->serverstate == CHAPSS_PENDING) {
ninoderkinderen 0:8d87bc453349 535 CHAPDEBUG(LOG_INFO, ("ChapReceiveResponse: in state %d\n",
ninoderkinderen 0:8d87bc453349 536 cstate->serverstate));
ninoderkinderen 0:8d87bc453349 537 return;
ninoderkinderen 0:8d87bc453349 538 }
ninoderkinderen 0:8d87bc453349 539
ninoderkinderen 0:8d87bc453349 540 if (id != cstate->chal_id) {
ninoderkinderen 0:8d87bc453349 541 return; /* doesn't match ID of last challenge */
ninoderkinderen 0:8d87bc453349 542 }
ninoderkinderen 0:8d87bc453349 543
ninoderkinderen 0:8d87bc453349 544 /*
ninoderkinderen 0:8d87bc453349 545 * If we have received a duplicate or bogus Response,
ninoderkinderen 0:8d87bc453349 546 * we have to send the same answer (Success/Failure)
ninoderkinderen 0:8d87bc453349 547 * as we did for the first Response we saw.
ninoderkinderen 0:8d87bc453349 548 */
ninoderkinderen 0:8d87bc453349 549 if (cstate->serverstate == CHAPSS_OPEN) {
ninoderkinderen 0:8d87bc453349 550 ChapSendStatus(cstate, CHAP_SUCCESS);
ninoderkinderen 0:8d87bc453349 551 return;
ninoderkinderen 0:8d87bc453349 552 }
ninoderkinderen 0:8d87bc453349 553 if (cstate->serverstate == CHAPSS_BADAUTH) {
ninoderkinderen 0:8d87bc453349 554 ChapSendStatus(cstate, CHAP_FAILURE);
ninoderkinderen 0:8d87bc453349 555 return;
ninoderkinderen 0:8d87bc453349 556 }
ninoderkinderen 0:8d87bc453349 557
ninoderkinderen 0:8d87bc453349 558 if (len < 2) {
ninoderkinderen 0:8d87bc453349 559 CHAPDEBUG(LOG_INFO, ("ChapReceiveResponse: rcvd short packet.\n"));
ninoderkinderen 0:8d87bc453349 560 return;
ninoderkinderen 0:8d87bc453349 561 }
ninoderkinderen 0:8d87bc453349 562 GETCHAR(remmd_len, inp); /* get length of MD */
ninoderkinderen 0:8d87bc453349 563 remmd = inp; /* get pointer to MD */
ninoderkinderen 0:8d87bc453349 564 INCPTR(remmd_len, inp);
ninoderkinderen 0:8d87bc453349 565
ninoderkinderen 0:8d87bc453349 566 len -= sizeof (u_char) + remmd_len;
ninoderkinderen 0:8d87bc453349 567 if (len < 0) {
ninoderkinderen 0:8d87bc453349 568 CHAPDEBUG(LOG_INFO, ("ChapReceiveResponse: rcvd short packet.\n"));
ninoderkinderen 0:8d87bc453349 569 return;
ninoderkinderen 0:8d87bc453349 570 }
ninoderkinderen 0:8d87bc453349 571
ninoderkinderen 0:8d87bc453349 572 UNTIMEOUT(ChapChallengeTimeout, cstate);
ninoderkinderen 0:8d87bc453349 573
ninoderkinderen 0:8d87bc453349 574 if (len >= (int)sizeof(rhostname)) {
ninoderkinderen 0:8d87bc453349 575 len = sizeof(rhostname) - 1;
ninoderkinderen 0:8d87bc453349 576 }
ninoderkinderen 0:8d87bc453349 577 BCOPY(inp, rhostname, len);
ninoderkinderen 0:8d87bc453349 578 rhostname[len] = '\000';
ninoderkinderen 0:8d87bc453349 579
ninoderkinderen 0:8d87bc453349 580 CHAPDEBUG(LOG_INFO, ("ChapReceiveResponse: received name field: %s\n",
ninoderkinderen 0:8d87bc453349 581 rhostname));
ninoderkinderen 0:8d87bc453349 582
ninoderkinderen 0:8d87bc453349 583 /*
ninoderkinderen 0:8d87bc453349 584 * Get secret for authenticating them with us,
ninoderkinderen 0:8d87bc453349 585 * do the hash ourselves, and compare the result.
ninoderkinderen 0:8d87bc453349 586 */
ninoderkinderen 0:8d87bc453349 587 code = CHAP_FAILURE;
ninoderkinderen 0:8d87bc453349 588 if (!get_secret(cstate->unit, rhostname, cstate->chal_name,
ninoderkinderen 0:8d87bc453349 589 secret, &secret_len, 1)) {
ninoderkinderen 0:8d87bc453349 590 CHAPDEBUG(LOG_WARNING, ("No CHAP secret found for authenticating %s\n",
ninoderkinderen 0:8d87bc453349 591 rhostname));
ninoderkinderen 0:8d87bc453349 592 } else {
ninoderkinderen 0:8d87bc453349 593 /* generate MD based on negotiated type */
ninoderkinderen 0:8d87bc453349 594 switch (cstate->chal_type) {
ninoderkinderen 0:8d87bc453349 595
ninoderkinderen 0:8d87bc453349 596 case CHAP_DIGEST_MD5: /* only MD5 is defined for now */
ninoderkinderen 0:8d87bc453349 597 if (remmd_len != MD5_SIGNATURE_SIZE) {
ninoderkinderen 0:8d87bc453349 598 break; /* it's not even the right length */
ninoderkinderen 0:8d87bc453349 599 }
ninoderkinderen 0:8d87bc453349 600 MD5Init(&mdContext);
ninoderkinderen 0:8d87bc453349 601 MD5Update(&mdContext, &cstate->chal_id, 1);
ninoderkinderen 0:8d87bc453349 602 MD5Update(&mdContext, (u_char*)secret, secret_len);
ninoderkinderen 0:8d87bc453349 603 MD5Update(&mdContext, cstate->challenge, cstate->chal_len);
ninoderkinderen 0:8d87bc453349 604 MD5Final(hash, &mdContext);
ninoderkinderen 0:8d87bc453349 605
ninoderkinderen 0:8d87bc453349 606 /* compare local and remote MDs and send the appropriate status */
ninoderkinderen 0:8d87bc453349 607 if (memcmp (hash, remmd, MD5_SIGNATURE_SIZE) == 0) {
ninoderkinderen 0:8d87bc453349 608 code = CHAP_SUCCESS; /* they are the same! */
ninoderkinderen 0:8d87bc453349 609 }
ninoderkinderen 0:8d87bc453349 610 break;
ninoderkinderen 0:8d87bc453349 611
ninoderkinderen 0:8d87bc453349 612 default:
ninoderkinderen 0:8d87bc453349 613 CHAPDEBUG(LOG_INFO, ("unknown digest type %d\n", cstate->chal_type));
ninoderkinderen 0:8d87bc453349 614 }
ninoderkinderen 0:8d87bc453349 615 }
ninoderkinderen 0:8d87bc453349 616
ninoderkinderen 0:8d87bc453349 617 BZERO(secret, sizeof(secret));
ninoderkinderen 0:8d87bc453349 618 ChapSendStatus(cstate, code);
ninoderkinderen 0:8d87bc453349 619
ninoderkinderen 0:8d87bc453349 620 if (code == CHAP_SUCCESS) {
ninoderkinderen 0:8d87bc453349 621 old_state = cstate->serverstate;
ninoderkinderen 0:8d87bc453349 622 cstate->serverstate = CHAPSS_OPEN;
ninoderkinderen 0:8d87bc453349 623 if (old_state == CHAPSS_INITIAL_CHAL) {
ninoderkinderen 0:8d87bc453349 624 auth_peer_success(cstate->unit, PPP_CHAP, rhostname, len);
ninoderkinderen 0:8d87bc453349 625 }
ninoderkinderen 0:8d87bc453349 626 if (cstate->chal_interval != 0) {
ninoderkinderen 0:8d87bc453349 627 TIMEOUT(ChapRechallenge, cstate, cstate->chal_interval);
ninoderkinderen 0:8d87bc453349 628 }
ninoderkinderen 0:8d87bc453349 629 } else {
ninoderkinderen 0:8d87bc453349 630 CHAPDEBUG(LOG_ERR, ("CHAP peer authentication failed\n"));
ninoderkinderen 0:8d87bc453349 631 cstate->serverstate = CHAPSS_BADAUTH;
ninoderkinderen 0:8d87bc453349 632 auth_peer_fail(cstate->unit, PPP_CHAP);
ninoderkinderen 0:8d87bc453349 633 }
ninoderkinderen 0:8d87bc453349 634 }
ninoderkinderen 0:8d87bc453349 635
ninoderkinderen 0:8d87bc453349 636 /*
ninoderkinderen 0:8d87bc453349 637 * ChapReceiveSuccess - Receive Success
ninoderkinderen 0:8d87bc453349 638 */
ninoderkinderen 0:8d87bc453349 639 static void
ninoderkinderen 0:8d87bc453349 640 ChapReceiveSuccess(chap_state *cstate, u_char *inp, u_char id, int len)
ninoderkinderen 0:8d87bc453349 641 {
ninoderkinderen 0:8d87bc453349 642 LWIP_UNUSED_ARG(id);
ninoderkinderen 0:8d87bc453349 643 LWIP_UNUSED_ARG(inp);
ninoderkinderen 0:8d87bc453349 644
ninoderkinderen 0:8d87bc453349 645 CHAPDEBUG(LOG_INFO, ("ChapReceiveSuccess: Rcvd id %d.\n", id));
ninoderkinderen 0:8d87bc453349 646
ninoderkinderen 0:8d87bc453349 647 if (cstate->clientstate == CHAPCS_OPEN) {
ninoderkinderen 0:8d87bc453349 648 /* presumably an answer to a duplicate response */
ninoderkinderen 0:8d87bc453349 649 return;
ninoderkinderen 0:8d87bc453349 650 }
ninoderkinderen 0:8d87bc453349 651
ninoderkinderen 0:8d87bc453349 652 if (cstate->clientstate != CHAPCS_RESPONSE) {
ninoderkinderen 0:8d87bc453349 653 /* don't know what this is */
ninoderkinderen 0:8d87bc453349 654 CHAPDEBUG(LOG_INFO, ("ChapReceiveSuccess: in state %d\n",
ninoderkinderen 0:8d87bc453349 655 cstate->clientstate));
ninoderkinderen 0:8d87bc453349 656 return;
ninoderkinderen 0:8d87bc453349 657 }
ninoderkinderen 0:8d87bc453349 658
ninoderkinderen 0:8d87bc453349 659 UNTIMEOUT(ChapResponseTimeout, cstate);
ninoderkinderen 0:8d87bc453349 660
ninoderkinderen 0:8d87bc453349 661 /*
ninoderkinderen 0:8d87bc453349 662 * Print message.
ninoderkinderen 0:8d87bc453349 663 */
ninoderkinderen 0:8d87bc453349 664 if (len > 0) {
ninoderkinderen 0:8d87bc453349 665 PRINTMSG(inp, len);
ninoderkinderen 0:8d87bc453349 666 }
ninoderkinderen 0:8d87bc453349 667
ninoderkinderen 0:8d87bc453349 668 cstate->clientstate = CHAPCS_OPEN;
ninoderkinderen 0:8d87bc453349 669
ninoderkinderen 0:8d87bc453349 670 auth_withpeer_success(cstate->unit, PPP_CHAP);
ninoderkinderen 0:8d87bc453349 671 }
ninoderkinderen 0:8d87bc453349 672
ninoderkinderen 0:8d87bc453349 673
ninoderkinderen 0:8d87bc453349 674 /*
ninoderkinderen 0:8d87bc453349 675 * ChapReceiveFailure - Receive failure.
ninoderkinderen 0:8d87bc453349 676 */
ninoderkinderen 0:8d87bc453349 677 static void
ninoderkinderen 0:8d87bc453349 678 ChapReceiveFailure(chap_state *cstate, u_char *inp, u_char id, int len)
ninoderkinderen 0:8d87bc453349 679 {
ninoderkinderen 0:8d87bc453349 680 LWIP_UNUSED_ARG(id);
ninoderkinderen 0:8d87bc453349 681 LWIP_UNUSED_ARG(inp);
ninoderkinderen 0:8d87bc453349 682
ninoderkinderen 0:8d87bc453349 683 CHAPDEBUG(LOG_INFO, ("ChapReceiveFailure: Rcvd id %d.\n", id));
ninoderkinderen 0:8d87bc453349 684
ninoderkinderen 0:8d87bc453349 685 if (cstate->clientstate != CHAPCS_RESPONSE) {
ninoderkinderen 0:8d87bc453349 686 /* don't know what this is */
ninoderkinderen 0:8d87bc453349 687 CHAPDEBUG(LOG_INFO, ("ChapReceiveFailure: in state %d\n",
ninoderkinderen 0:8d87bc453349 688 cstate->clientstate));
ninoderkinderen 0:8d87bc453349 689 return;
ninoderkinderen 0:8d87bc453349 690 }
ninoderkinderen 0:8d87bc453349 691
ninoderkinderen 0:8d87bc453349 692 UNTIMEOUT(ChapResponseTimeout, cstate);
ninoderkinderen 0:8d87bc453349 693
ninoderkinderen 0:8d87bc453349 694 /*
ninoderkinderen 0:8d87bc453349 695 * Print message.
ninoderkinderen 0:8d87bc453349 696 */
ninoderkinderen 0:8d87bc453349 697 if (len > 0) {
ninoderkinderen 0:8d87bc453349 698 PRINTMSG(inp, len);
ninoderkinderen 0:8d87bc453349 699 }
ninoderkinderen 0:8d87bc453349 700
ninoderkinderen 0:8d87bc453349 701 CHAPDEBUG(LOG_ERR, ("CHAP authentication failed\n"));
ninoderkinderen 0:8d87bc453349 702 auth_withpeer_fail(cstate->unit, PPP_CHAP); /* lwip: just sets the PPP error code on this unit to PPPERR_AUTHFAIL */
ninoderkinderen 0:8d87bc453349 703 }
ninoderkinderen 0:8d87bc453349 704
ninoderkinderen 0:8d87bc453349 705
ninoderkinderen 0:8d87bc453349 706 /*
ninoderkinderen 0:8d87bc453349 707 * ChapSendChallenge - Send an Authenticate challenge.
ninoderkinderen 0:8d87bc453349 708 */
ninoderkinderen 0:8d87bc453349 709 static void
ninoderkinderen 0:8d87bc453349 710 ChapSendChallenge(chap_state *cstate)
ninoderkinderen 0:8d87bc453349 711 {
ninoderkinderen 0:8d87bc453349 712 u_char *outp;
ninoderkinderen 0:8d87bc453349 713 int chal_len, name_len;
ninoderkinderen 0:8d87bc453349 714 int outlen;
ninoderkinderen 0:8d87bc453349 715
ninoderkinderen 0:8d87bc453349 716 chal_len = cstate->chal_len;
ninoderkinderen 0:8d87bc453349 717 name_len = (int)strlen(cstate->chal_name);
ninoderkinderen 0:8d87bc453349 718 outlen = CHAP_HEADERLEN + sizeof (u_char) + chal_len + name_len;
ninoderkinderen 0:8d87bc453349 719 outp = outpacket_buf[cstate->unit];
ninoderkinderen 0:8d87bc453349 720
ninoderkinderen 0:8d87bc453349 721 MAKEHEADER(outp, PPP_CHAP); /* paste in a CHAP header */
ninoderkinderen 0:8d87bc453349 722
ninoderkinderen 0:8d87bc453349 723 PUTCHAR(CHAP_CHALLENGE, outp);
ninoderkinderen 0:8d87bc453349 724 PUTCHAR(cstate->chal_id, outp);
ninoderkinderen 0:8d87bc453349 725 PUTSHORT(outlen, outp);
ninoderkinderen 0:8d87bc453349 726
ninoderkinderen 0:8d87bc453349 727 PUTCHAR(chal_len, outp); /* put length of challenge */
ninoderkinderen 0:8d87bc453349 728 BCOPY(cstate->challenge, outp, chal_len);
ninoderkinderen 0:8d87bc453349 729 INCPTR(chal_len, outp);
ninoderkinderen 0:8d87bc453349 730
ninoderkinderen 0:8d87bc453349 731 BCOPY(cstate->chal_name, outp, name_len); /* append hostname */
ninoderkinderen 0:8d87bc453349 732
ninoderkinderen 0:8d87bc453349 733 pppWrite(cstate->unit, outpacket_buf[cstate->unit], outlen + PPP_HDRLEN);
ninoderkinderen 0:8d87bc453349 734
ninoderkinderen 0:8d87bc453349 735 CHAPDEBUG(LOG_INFO, ("ChapSendChallenge: Sent id %d.\n", cstate->chal_id));
ninoderkinderen 0:8d87bc453349 736
ninoderkinderen 0:8d87bc453349 737 TIMEOUT(ChapChallengeTimeout, cstate, cstate->timeouttime);
ninoderkinderen 0:8d87bc453349 738 ++cstate->chal_transmits;
ninoderkinderen 0:8d87bc453349 739 }
ninoderkinderen 0:8d87bc453349 740
ninoderkinderen 0:8d87bc453349 741
ninoderkinderen 0:8d87bc453349 742 /*
ninoderkinderen 0:8d87bc453349 743 * ChapSendStatus - Send a status response (ack or nak).
ninoderkinderen 0:8d87bc453349 744 */
ninoderkinderen 0:8d87bc453349 745 static void
ninoderkinderen 0:8d87bc453349 746 ChapSendStatus(chap_state *cstate, int code)
ninoderkinderen 0:8d87bc453349 747 {
ninoderkinderen 0:8d87bc453349 748 u_char *outp;
ninoderkinderen 0:8d87bc453349 749 int outlen, msglen;
ninoderkinderen 0:8d87bc453349 750 char msg[256]; /* @todo: this can be a char*, no strcpy needed */
ninoderkinderen 0:8d87bc453349 751
ninoderkinderen 0:8d87bc453349 752 if (code == CHAP_SUCCESS) {
ninoderkinderen 0:8d87bc453349 753 strcpy(msg, "Welcome!");
ninoderkinderen 0:8d87bc453349 754 } else {
ninoderkinderen 0:8d87bc453349 755 strcpy(msg, "I don't like you. Go 'way.");
ninoderkinderen 0:8d87bc453349 756 }
ninoderkinderen 0:8d87bc453349 757 msglen = (int)strlen(msg);
ninoderkinderen 0:8d87bc453349 758
ninoderkinderen 0:8d87bc453349 759 outlen = CHAP_HEADERLEN + msglen;
ninoderkinderen 0:8d87bc453349 760 outp = outpacket_buf[cstate->unit];
ninoderkinderen 0:8d87bc453349 761
ninoderkinderen 0:8d87bc453349 762 MAKEHEADER(outp, PPP_CHAP); /* paste in a header */
ninoderkinderen 0:8d87bc453349 763
ninoderkinderen 0:8d87bc453349 764 PUTCHAR(code, outp);
ninoderkinderen 0:8d87bc453349 765 PUTCHAR(cstate->chal_id, outp);
ninoderkinderen 0:8d87bc453349 766 PUTSHORT(outlen, outp);
ninoderkinderen 0:8d87bc453349 767 BCOPY(msg, outp, msglen);
ninoderkinderen 0:8d87bc453349 768 pppWrite(cstate->unit, outpacket_buf[cstate->unit], outlen + PPP_HDRLEN);
ninoderkinderen 0:8d87bc453349 769
ninoderkinderen 0:8d87bc453349 770 CHAPDEBUG(LOG_INFO, ("ChapSendStatus: Sent code %d, id %d.\n", code,
ninoderkinderen 0:8d87bc453349 771 cstate->chal_id));
ninoderkinderen 0:8d87bc453349 772 }
ninoderkinderen 0:8d87bc453349 773
ninoderkinderen 0:8d87bc453349 774 /*
ninoderkinderen 0:8d87bc453349 775 * ChapGenChallenge is used to generate a pseudo-random challenge string of
ninoderkinderen 0:8d87bc453349 776 * a pseudo-random length between min_len and max_len. The challenge
ninoderkinderen 0:8d87bc453349 777 * string and its length are stored in *cstate, and various other fields of
ninoderkinderen 0:8d87bc453349 778 * *cstate are initialized.
ninoderkinderen 0:8d87bc453349 779 */
ninoderkinderen 0:8d87bc453349 780
ninoderkinderen 0:8d87bc453349 781 static void
ninoderkinderen 0:8d87bc453349 782 ChapGenChallenge(chap_state *cstate)
ninoderkinderen 0:8d87bc453349 783 {
ninoderkinderen 0:8d87bc453349 784 int chal_len;
ninoderkinderen 0:8d87bc453349 785 u_char *ptr = cstate->challenge;
ninoderkinderen 0:8d87bc453349 786 int i;
ninoderkinderen 0:8d87bc453349 787
ninoderkinderen 0:8d87bc453349 788 /* pick a random challenge length between MIN_CHALLENGE_LENGTH and
ninoderkinderen 0:8d87bc453349 789 MAX_CHALLENGE_LENGTH */
ninoderkinderen 0:8d87bc453349 790 chal_len = (unsigned)
ninoderkinderen 0:8d87bc453349 791 ((((magic() >> 16) *
ninoderkinderen 0:8d87bc453349 792 (MAX_CHALLENGE_LENGTH - MIN_CHALLENGE_LENGTH)) >> 16)
ninoderkinderen 0:8d87bc453349 793 + MIN_CHALLENGE_LENGTH);
ninoderkinderen 0:8d87bc453349 794 LWIP_ASSERT("chal_len <= 0xff", chal_len <= 0xffff);
ninoderkinderen 0:8d87bc453349 795 cstate->chal_len = (u_char)chal_len;
ninoderkinderen 0:8d87bc453349 796 cstate->chal_id = ++cstate->id;
ninoderkinderen 0:8d87bc453349 797 cstate->chal_transmits = 0;
ninoderkinderen 0:8d87bc453349 798
ninoderkinderen 0:8d87bc453349 799 /* generate a random string */
ninoderkinderen 0:8d87bc453349 800 for (i = 0; i < chal_len; i++ ) {
ninoderkinderen 0:8d87bc453349 801 *ptr++ = (char) (magic() & 0xff);
ninoderkinderen 0:8d87bc453349 802 }
ninoderkinderen 0:8d87bc453349 803 }
ninoderkinderen 0:8d87bc453349 804
ninoderkinderen 0:8d87bc453349 805 /*
ninoderkinderen 0:8d87bc453349 806 * ChapSendResponse - send a response packet with values as specified
ninoderkinderen 0:8d87bc453349 807 * in *cstate.
ninoderkinderen 0:8d87bc453349 808 */
ninoderkinderen 0:8d87bc453349 809 /* ARGSUSED */
ninoderkinderen 0:8d87bc453349 810 static void
ninoderkinderen 0:8d87bc453349 811 ChapSendResponse(chap_state *cstate)
ninoderkinderen 0:8d87bc453349 812 {
ninoderkinderen 0:8d87bc453349 813 u_char *outp;
ninoderkinderen 0:8d87bc453349 814 int outlen, md_len, name_len;
ninoderkinderen 0:8d87bc453349 815
ninoderkinderen 0:8d87bc453349 816 md_len = cstate->resp_length;
ninoderkinderen 0:8d87bc453349 817 name_len = (int)strlen(cstate->resp_name);
ninoderkinderen 0:8d87bc453349 818 outlen = CHAP_HEADERLEN + sizeof (u_char) + md_len + name_len;
ninoderkinderen 0:8d87bc453349 819 outp = outpacket_buf[cstate->unit];
ninoderkinderen 0:8d87bc453349 820
ninoderkinderen 0:8d87bc453349 821 MAKEHEADER(outp, PPP_CHAP);
ninoderkinderen 0:8d87bc453349 822
ninoderkinderen 0:8d87bc453349 823 PUTCHAR(CHAP_RESPONSE, outp); /* we are a response */
ninoderkinderen 0:8d87bc453349 824 PUTCHAR(cstate->resp_id, outp); /* copy id from challenge packet */
ninoderkinderen 0:8d87bc453349 825 PUTSHORT(outlen, outp); /* packet length */
ninoderkinderen 0:8d87bc453349 826
ninoderkinderen 0:8d87bc453349 827 PUTCHAR(md_len, outp); /* length of MD */
ninoderkinderen 0:8d87bc453349 828 BCOPY(cstate->response, outp, md_len); /* copy MD to buffer */
ninoderkinderen 0:8d87bc453349 829 INCPTR(md_len, outp);
ninoderkinderen 0:8d87bc453349 830
ninoderkinderen 0:8d87bc453349 831 BCOPY(cstate->resp_name, outp, name_len); /* append our name */
ninoderkinderen 0:8d87bc453349 832
ninoderkinderen 0:8d87bc453349 833 /* send the packet */
ninoderkinderen 0:8d87bc453349 834 pppWrite(cstate->unit, outpacket_buf[cstate->unit], outlen + PPP_HDRLEN);
ninoderkinderen 0:8d87bc453349 835
ninoderkinderen 0:8d87bc453349 836 cstate->clientstate = CHAPCS_RESPONSE;
ninoderkinderen 0:8d87bc453349 837 TIMEOUT(ChapResponseTimeout, cstate, cstate->timeouttime);
ninoderkinderen 0:8d87bc453349 838 ++cstate->resp_transmits;
ninoderkinderen 0:8d87bc453349 839 }
ninoderkinderen 0:8d87bc453349 840
ninoderkinderen 0:8d87bc453349 841 #if PPP_ADDITIONAL_CALLBACKS
ninoderkinderen 0:8d87bc453349 842 static char *ChapCodenames[] = {
ninoderkinderen 0:8d87bc453349 843 "Challenge", "Response", "Success", "Failure"
ninoderkinderen 0:8d87bc453349 844 };
ninoderkinderen 0:8d87bc453349 845 /*
ninoderkinderen 0:8d87bc453349 846 * ChapPrintPkt - print the contents of a CHAP packet.
ninoderkinderen 0:8d87bc453349 847 */
ninoderkinderen 0:8d87bc453349 848 static int
ninoderkinderen 0:8d87bc453349 849 ChapPrintPkt( u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
ninoderkinderen 0:8d87bc453349 850 {
ninoderkinderen 0:8d87bc453349 851 int code, id, len;
ninoderkinderen 0:8d87bc453349 852 int clen, nlen;
ninoderkinderen 0:8d87bc453349 853 u_char x;
ninoderkinderen 0:8d87bc453349 854
ninoderkinderen 0:8d87bc453349 855 if (plen < CHAP_HEADERLEN) {
ninoderkinderen 0:8d87bc453349 856 return 0;
ninoderkinderen 0:8d87bc453349 857 }
ninoderkinderen 0:8d87bc453349 858 GETCHAR(code, p);
ninoderkinderen 0:8d87bc453349 859 GETCHAR(id, p);
ninoderkinderen 0:8d87bc453349 860 GETSHORT(len, p);
ninoderkinderen 0:8d87bc453349 861 if (len < CHAP_HEADERLEN || len > plen) {
ninoderkinderen 0:8d87bc453349 862 return 0;
ninoderkinderen 0:8d87bc453349 863 }
ninoderkinderen 0:8d87bc453349 864
ninoderkinderen 0:8d87bc453349 865 if (code >= 1 && code <= sizeof(ChapCodenames) / sizeof(char *)) {
ninoderkinderen 0:8d87bc453349 866 printer(arg, " %s", ChapCodenames[code-1]);
ninoderkinderen 0:8d87bc453349 867 } else {
ninoderkinderen 0:8d87bc453349 868 printer(arg, " code=0x%x", code);
ninoderkinderen 0:8d87bc453349 869 }
ninoderkinderen 0:8d87bc453349 870 printer(arg, " id=0x%x", id);
ninoderkinderen 0:8d87bc453349 871 len -= CHAP_HEADERLEN;
ninoderkinderen 0:8d87bc453349 872 switch (code) {
ninoderkinderen 0:8d87bc453349 873 case CHAP_CHALLENGE:
ninoderkinderen 0:8d87bc453349 874 case CHAP_RESPONSE:
ninoderkinderen 0:8d87bc453349 875 if (len < 1) {
ninoderkinderen 0:8d87bc453349 876 break;
ninoderkinderen 0:8d87bc453349 877 }
ninoderkinderen 0:8d87bc453349 878 clen = p[0];
ninoderkinderen 0:8d87bc453349 879 if (len < clen + 1) {
ninoderkinderen 0:8d87bc453349 880 break;
ninoderkinderen 0:8d87bc453349 881 }
ninoderkinderen 0:8d87bc453349 882 ++p;
ninoderkinderen 0:8d87bc453349 883 nlen = len - clen - 1;
ninoderkinderen 0:8d87bc453349 884 printer(arg, " <");
ninoderkinderen 0:8d87bc453349 885 for (; clen > 0; --clen) {
ninoderkinderen 0:8d87bc453349 886 GETCHAR(x, p);
ninoderkinderen 0:8d87bc453349 887 printer(arg, "%.2x", x);
ninoderkinderen 0:8d87bc453349 888 }
ninoderkinderen 0:8d87bc453349 889 printer(arg, ">, name = %.*Z", nlen, p);
ninoderkinderen 0:8d87bc453349 890 break;
ninoderkinderen 0:8d87bc453349 891 case CHAP_FAILURE:
ninoderkinderen 0:8d87bc453349 892 case CHAP_SUCCESS:
ninoderkinderen 0:8d87bc453349 893 printer(arg, " %.*Z", len, p);
ninoderkinderen 0:8d87bc453349 894 break;
ninoderkinderen 0:8d87bc453349 895 default:
ninoderkinderen 0:8d87bc453349 896 for (clen = len; clen > 0; --clen) {
ninoderkinderen 0:8d87bc453349 897 GETCHAR(x, p);
ninoderkinderen 0:8d87bc453349 898 printer(arg, " %.2x", x);
ninoderkinderen 0:8d87bc453349 899 }
ninoderkinderen 0:8d87bc453349 900 }
ninoderkinderen 0:8d87bc453349 901
ninoderkinderen 0:8d87bc453349 902 return len + CHAP_HEADERLEN;
ninoderkinderen 0:8d87bc453349 903 }
ninoderkinderen 0:8d87bc453349 904 #endif /* PPP_ADDITIONAL_CALLBACKS */
ninoderkinderen 0:8d87bc453349 905
ninoderkinderen 0:8d87bc453349 906 #endif /* CHAP_SUPPORT */
ninoderkinderen 0:8d87bc453349 907
ninoderkinderen 0:8d87bc453349 908 #endif /* PPP_SUPPORT */