Adam Green / EthernetInterface

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lwip/netif/ppp/chap.c@0:3b00827bb0b7, 2013-09-07 (annotated)

Committer:
AdamGreen
Date:
Sat Sep 07 21:38:42 2013 +0000
Revision:
0:3b00827bb0b7
Sync to latest network stack source from github.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AdamGreen 0:3b00827bb0b7 1 /*** WARNING - THIS HAS NEVER BEEN FINISHED ***/
AdamGreen 0:3b00827bb0b7 2 /*****************************************************************************
AdamGreen 0:3b00827bb0b7 3 * chap.c - Network Challenge Handshake Authentication Protocol program file.
AdamGreen 0:3b00827bb0b7 4 *
AdamGreen 0:3b00827bb0b7 5 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
AdamGreen 0:3b00827bb0b7 6 * portions Copyright (c) 1997 by Global Election Systems Inc.
AdamGreen 0:3b00827bb0b7 7 *
AdamGreen 0:3b00827bb0b7 8 * The authors hereby grant permission to use, copy, modify, distribute,
AdamGreen 0:3b00827bb0b7 9 * and license this software and its documentation for any purpose, provided
AdamGreen 0:3b00827bb0b7 10 * that existing copyright notices are retained in all copies and that this
AdamGreen 0:3b00827bb0b7 11 * notice and the following disclaimer are included verbatim in any
AdamGreen 0:3b00827bb0b7 12 * distributions. No written agreement, license, or royalty fee is required
AdamGreen 0:3b00827bb0b7 13 * for any of the authorized uses.
AdamGreen 0:3b00827bb0b7 14 *
AdamGreen 0:3b00827bb0b7 15 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
AdamGreen 0:3b00827bb0b7 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
AdamGreen 0:3b00827bb0b7 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
AdamGreen 0:3b00827bb0b7 18 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
AdamGreen 0:3b00827bb0b7 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
AdamGreen 0:3b00827bb0b7 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
AdamGreen 0:3b00827bb0b7 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
AdamGreen 0:3b00827bb0b7 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
AdamGreen 0:3b00827bb0b7 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
AdamGreen 0:3b00827bb0b7 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AdamGreen 0:3b00827bb0b7 25 *
AdamGreen 0:3b00827bb0b7 26 ******************************************************************************
AdamGreen 0:3b00827bb0b7 27 * REVISION HISTORY
AdamGreen 0:3b00827bb0b7 28 *
AdamGreen 0:3b00827bb0b7 29 * 03-01-01 Marc Boucher <marc@mbsi.ca>
AdamGreen 0:3b00827bb0b7 30 * Ported to lwIP.
AdamGreen 0:3b00827bb0b7 31 * 97-12-04 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
AdamGreen 0:3b00827bb0b7 32 * Original based on BSD chap.c.
AdamGreen 0:3b00827bb0b7 33 *****************************************************************************/
AdamGreen 0:3b00827bb0b7 34 /*
AdamGreen 0:3b00827bb0b7 35 * chap.c - Challenge Handshake Authentication Protocol.
AdamGreen 0:3b00827bb0b7 36 *
AdamGreen 0:3b00827bb0b7 37 * Copyright (c) 1993 The Australian National University.
AdamGreen 0:3b00827bb0b7 38 * All rights reserved.
AdamGreen 0:3b00827bb0b7 39 *
AdamGreen 0:3b00827bb0b7 40 * Redistribution and use in source and binary forms are permitted
AdamGreen 0:3b00827bb0b7 41 * provided that the above copyright notice and this paragraph are
AdamGreen 0:3b00827bb0b7 42 * duplicated in all such forms and that any documentation,
AdamGreen 0:3b00827bb0b7 43 * advertising materials, and other materials related to such
AdamGreen 0:3b00827bb0b7 44 * distribution and use acknowledge that the software was developed
AdamGreen 0:3b00827bb0b7 45 * by the Australian National University. The name of the University
AdamGreen 0:3b00827bb0b7 46 * may not be used to endorse or promote products derived from this
AdamGreen 0:3b00827bb0b7 47 * software without specific prior written permission.
AdamGreen 0:3b00827bb0b7 48 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
AdamGreen 0:3b00827bb0b7 49 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
AdamGreen 0:3b00827bb0b7 50 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
AdamGreen 0:3b00827bb0b7 51 *
AdamGreen 0:3b00827bb0b7 52 * Copyright (c) 1991 Gregory M. Christy.
AdamGreen 0:3b00827bb0b7 53 * All rights reserved.
AdamGreen 0:3b00827bb0b7 54 *
AdamGreen 0:3b00827bb0b7 55 * Redistribution and use in source and binary forms are permitted
AdamGreen 0:3b00827bb0b7 56 * provided that the above copyright notice and this paragraph are
AdamGreen 0:3b00827bb0b7 57 * duplicated in all such forms and that any documentation,
AdamGreen 0:3b00827bb0b7 58 * advertising materials, and other materials related to such
AdamGreen 0:3b00827bb0b7 59 * distribution and use acknowledge that the software was developed
AdamGreen 0:3b00827bb0b7 60 * by Gregory M. Christy. The name of the author may not be used to
AdamGreen 0:3b00827bb0b7 61 * endorse or promote products derived from this software without
AdamGreen 0:3b00827bb0b7 62 * specific prior written permission.
AdamGreen 0:3b00827bb0b7 63 *
AdamGreen 0:3b00827bb0b7 64 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
AdamGreen 0:3b00827bb0b7 65 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
AdamGreen 0:3b00827bb0b7 66 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
AdamGreen 0:3b00827bb0b7 67 */
AdamGreen 0:3b00827bb0b7 68
AdamGreen 0:3b00827bb0b7 69 #include "lwip/opt.h"
AdamGreen 0:3b00827bb0b7 70
AdamGreen 0:3b00827bb0b7 71 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
AdamGreen 0:3b00827bb0b7 72
AdamGreen 0:3b00827bb0b7 73 #if CHAP_SUPPORT /* don't build if not configured for use in lwipopts.h */
AdamGreen 0:3b00827bb0b7 74
AdamGreen 0:3b00827bb0b7 75 #include "ppp.h"
AdamGreen 0:3b00827bb0b7 76 #include "pppdebug.h"
AdamGreen 0:3b00827bb0b7 77
AdamGreen 0:3b00827bb0b7 78 #include "magic.h"
AdamGreen 0:3b00827bb0b7 79 #include "randm.h"
AdamGreen 0:3b00827bb0b7 80 #include "auth.h"
AdamGreen 0:3b00827bb0b7 81 #include "md5.h"
AdamGreen 0:3b00827bb0b7 82 #include "chap.h"
AdamGreen 0:3b00827bb0b7 83 #include "chpms.h"
AdamGreen 0:3b00827bb0b7 84
AdamGreen 0:3b00827bb0b7 85 #include <string.h>
AdamGreen 0:3b00827bb0b7 86
AdamGreen 0:3b00827bb0b7 87 #if 0 /* UNUSED */
AdamGreen 0:3b00827bb0b7 88 /*
AdamGreen 0:3b00827bb0b7 89 * Command-line options.
AdamGreen 0:3b00827bb0b7 90 */
AdamGreen 0:3b00827bb0b7 91 static option_t chap_option_list[] = {
AdamGreen 0:3b00827bb0b7 92 { "chap-restart", o_int, &chap[0].timeouttime,
AdamGreen 0:3b00827bb0b7 93 "Set timeout for CHAP" },
AdamGreen 0:3b00827bb0b7 94 { "chap-max-challenge", o_int, &chap[0].max_transmits,
AdamGreen 0:3b00827bb0b7 95 "Set max #xmits for challenge" },
AdamGreen 0:3b00827bb0b7 96 { "chap-interval", o_int, &chap[0].chal_interval,
AdamGreen 0:3b00827bb0b7 97 "Set interval for rechallenge" },
AdamGreen 0:3b00827bb0b7 98 #ifdef MSLANMAN
AdamGreen 0:3b00827bb0b7 99 { "ms-lanman", o_bool, &ms_lanman,
AdamGreen 0:3b00827bb0b7 100 "Use LanMan passwd when using MS-CHAP", 1 },
AdamGreen 0:3b00827bb0b7 101 #endif
AdamGreen 0:3b00827bb0b7 102 { NULL }
AdamGreen 0:3b00827bb0b7 103 };
AdamGreen 0:3b00827bb0b7 104 #endif /* UNUSED */
AdamGreen 0:3b00827bb0b7 105
AdamGreen 0:3b00827bb0b7 106 /*
AdamGreen 0:3b00827bb0b7 107 * Protocol entry points.
AdamGreen 0:3b00827bb0b7 108 */
AdamGreen 0:3b00827bb0b7 109 static void ChapInit (int);
AdamGreen 0:3b00827bb0b7 110 static void ChapLowerUp (int);
AdamGreen 0:3b00827bb0b7 111 static void ChapLowerDown (int);
AdamGreen 0:3b00827bb0b7 112 static void ChapInput (int, u_char *, int);
AdamGreen 0:3b00827bb0b7 113 static void ChapProtocolReject (int);
AdamGreen 0:3b00827bb0b7 114 #if PPP_ADDITIONAL_CALLBACKS
AdamGreen 0:3b00827bb0b7 115 static int ChapPrintPkt (u_char *, int, void (*) (void *, char *, ...), void *);
AdamGreen 0:3b00827bb0b7 116 #endif
AdamGreen 0:3b00827bb0b7 117
AdamGreen 0:3b00827bb0b7 118 struct protent chap_protent = {
AdamGreen 0:3b00827bb0b7 119 PPP_CHAP,
AdamGreen 0:3b00827bb0b7 120 ChapInit,
AdamGreen 0:3b00827bb0b7 121 ChapInput,
AdamGreen 0:3b00827bb0b7 122 ChapProtocolReject,
AdamGreen 0:3b00827bb0b7 123 ChapLowerUp,
AdamGreen 0:3b00827bb0b7 124 ChapLowerDown,
AdamGreen 0:3b00827bb0b7 125 NULL,
AdamGreen 0:3b00827bb0b7 126 NULL,
AdamGreen 0:3b00827bb0b7 127 #if PPP_ADDITIONAL_CALLBACKS
AdamGreen 0:3b00827bb0b7 128 ChapPrintPkt,
AdamGreen 0:3b00827bb0b7 129 NULL,
AdamGreen 0:3b00827bb0b7 130 #endif /* PPP_ADDITIONAL_CALLBACKS */
AdamGreen 0:3b00827bb0b7 131 1,
AdamGreen 0:3b00827bb0b7 132 "CHAP",
AdamGreen 0:3b00827bb0b7 133 #if PPP_ADDITIONAL_CALLBACKS
AdamGreen 0:3b00827bb0b7 134 NULL,
AdamGreen 0:3b00827bb0b7 135 NULL,
AdamGreen 0:3b00827bb0b7 136 NULL
AdamGreen 0:3b00827bb0b7 137 #endif /* PPP_ADDITIONAL_CALLBACKS */
AdamGreen 0:3b00827bb0b7 138 };
AdamGreen 0:3b00827bb0b7 139
AdamGreen 0:3b00827bb0b7 140 chap_state chap[NUM_PPP]; /* CHAP state; one for each unit */
AdamGreen 0:3b00827bb0b7 141
AdamGreen 0:3b00827bb0b7 142 static void ChapChallengeTimeout (void *);
AdamGreen 0:3b00827bb0b7 143 static void ChapResponseTimeout (void *);
AdamGreen 0:3b00827bb0b7 144 static void ChapReceiveChallenge (chap_state *, u_char *, u_char, int);
AdamGreen 0:3b00827bb0b7 145 static void ChapRechallenge (void *);
AdamGreen 0:3b00827bb0b7 146 static void ChapReceiveResponse (chap_state *, u_char *, int, int);
AdamGreen 0:3b00827bb0b7 147 static void ChapReceiveSuccess(chap_state *cstate, u_char *inp, u_char id, int len);
AdamGreen 0:3b00827bb0b7 148 static void ChapReceiveFailure(chap_state *cstate, u_char *inp, u_char id, int len);
AdamGreen 0:3b00827bb0b7 149 static void ChapSendStatus (chap_state *, int);
AdamGreen 0:3b00827bb0b7 150 static void ChapSendChallenge (chap_state *);
AdamGreen 0:3b00827bb0b7 151 static void ChapSendResponse (chap_state *);
AdamGreen 0:3b00827bb0b7 152 static void ChapGenChallenge (chap_state *);
AdamGreen 0:3b00827bb0b7 153
AdamGreen 0:3b00827bb0b7 154 /*
AdamGreen 0:3b00827bb0b7 155 * ChapInit - Initialize a CHAP unit.
AdamGreen 0:3b00827bb0b7 156 */
AdamGreen 0:3b00827bb0b7 157 static void
AdamGreen 0:3b00827bb0b7 158 ChapInit(int unit)
AdamGreen 0:3b00827bb0b7 159 {
AdamGreen 0:3b00827bb0b7 160 chap_state *cstate = &chap[unit];
AdamGreen 0:3b00827bb0b7 161
AdamGreen 0:3b00827bb0b7 162 BZERO(cstate, sizeof(*cstate));
AdamGreen 0:3b00827bb0b7 163 cstate->unit = unit;
AdamGreen 0:3b00827bb0b7 164 cstate->clientstate = CHAPCS_INITIAL;
AdamGreen 0:3b00827bb0b7 165 cstate->serverstate = CHAPSS_INITIAL;
AdamGreen 0:3b00827bb0b7 166 cstate->timeouttime = CHAP_DEFTIMEOUT;
AdamGreen 0:3b00827bb0b7 167 cstate->max_transmits = CHAP_DEFTRANSMITS;
AdamGreen 0:3b00827bb0b7 168 /* random number generator is initialized in magic_init */
AdamGreen 0:3b00827bb0b7 169 }
AdamGreen 0:3b00827bb0b7 170
AdamGreen 0:3b00827bb0b7 171
AdamGreen 0:3b00827bb0b7 172 /*
AdamGreen 0:3b00827bb0b7 173 * ChapAuthWithPeer - Authenticate us with our peer (start client).
AdamGreen 0:3b00827bb0b7 174 *
AdamGreen 0:3b00827bb0b7 175 */
AdamGreen 0:3b00827bb0b7 176 void
AdamGreen 0:3b00827bb0b7 177 ChapAuthWithPeer(int unit, char *our_name, u_char digest)
AdamGreen 0:3b00827bb0b7 178 {
AdamGreen 0:3b00827bb0b7 179 chap_state *cstate = &chap[unit];
AdamGreen 0:3b00827bb0b7 180
AdamGreen 0:3b00827bb0b7 181 cstate->resp_name = our_name;
AdamGreen 0:3b00827bb0b7 182 cstate->resp_type = digest;
AdamGreen 0:3b00827bb0b7 183
AdamGreen 0:3b00827bb0b7 184 if (cstate->clientstate == CHAPCS_INITIAL ||
AdamGreen 0:3b00827bb0b7 185 cstate->clientstate == CHAPCS_PENDING) {
AdamGreen 0:3b00827bb0b7 186 /* lower layer isn't up - wait until later */
AdamGreen 0:3b00827bb0b7 187 cstate->clientstate = CHAPCS_PENDING;
AdamGreen 0:3b00827bb0b7 188 return;
AdamGreen 0:3b00827bb0b7 189 }
AdamGreen 0:3b00827bb0b7 190
AdamGreen 0:3b00827bb0b7 191 /*
AdamGreen 0:3b00827bb0b7 192 * We get here as a result of LCP coming up.
AdamGreen 0:3b00827bb0b7 193 * So even if CHAP was open before, we will
AdamGreen 0:3b00827bb0b7 194 * have to re-authenticate ourselves.
AdamGreen 0:3b00827bb0b7 195 */
AdamGreen 0:3b00827bb0b7 196 cstate->clientstate = CHAPCS_LISTEN;
AdamGreen 0:3b00827bb0b7 197 }
AdamGreen 0:3b00827bb0b7 198
AdamGreen 0:3b00827bb0b7 199
AdamGreen 0:3b00827bb0b7 200 /*
AdamGreen 0:3b00827bb0b7 201 * ChapAuthPeer - Authenticate our peer (start server).
AdamGreen 0:3b00827bb0b7 202 */
AdamGreen 0:3b00827bb0b7 203 void
AdamGreen 0:3b00827bb0b7 204 ChapAuthPeer(int unit, char *our_name, u_char digest)
AdamGreen 0:3b00827bb0b7 205 {
AdamGreen 0:3b00827bb0b7 206 chap_state *cstate = &chap[unit];
AdamGreen 0:3b00827bb0b7 207
AdamGreen 0:3b00827bb0b7 208 cstate->chal_name = our_name;
AdamGreen 0:3b00827bb0b7 209 cstate->chal_type = digest;
AdamGreen 0:3b00827bb0b7 210
AdamGreen 0:3b00827bb0b7 211 if (cstate->serverstate == CHAPSS_INITIAL ||
AdamGreen 0:3b00827bb0b7 212 cstate->serverstate == CHAPSS_PENDING) {
AdamGreen 0:3b00827bb0b7 213 /* lower layer isn't up - wait until later */
AdamGreen 0:3b00827bb0b7 214 cstate->serverstate = CHAPSS_PENDING;
AdamGreen 0:3b00827bb0b7 215 return;
AdamGreen 0:3b00827bb0b7 216 }
AdamGreen 0:3b00827bb0b7 217
AdamGreen 0:3b00827bb0b7 218 ChapGenChallenge(cstate);
AdamGreen 0:3b00827bb0b7 219 ChapSendChallenge(cstate); /* crank it up dude! */
AdamGreen 0:3b00827bb0b7 220 cstate->serverstate = CHAPSS_INITIAL_CHAL;
AdamGreen 0:3b00827bb0b7 221 }
AdamGreen 0:3b00827bb0b7 222
AdamGreen 0:3b00827bb0b7 223
AdamGreen 0:3b00827bb0b7 224 /*
AdamGreen 0:3b00827bb0b7 225 * ChapChallengeTimeout - Timeout expired on sending challenge.
AdamGreen 0:3b00827bb0b7 226 */
AdamGreen 0:3b00827bb0b7 227 static void
AdamGreen 0:3b00827bb0b7 228 ChapChallengeTimeout(void *arg)
AdamGreen 0:3b00827bb0b7 229 {
AdamGreen 0:3b00827bb0b7 230 chap_state *cstate = (chap_state *) arg;
AdamGreen 0:3b00827bb0b7 231
AdamGreen 0:3b00827bb0b7 232 /* if we aren't sending challenges, don't worry. then again we */
AdamGreen 0:3b00827bb0b7 233 /* probably shouldn't be here either */
AdamGreen 0:3b00827bb0b7 234 if (cstate->serverstate != CHAPSS_INITIAL_CHAL &&
AdamGreen 0:3b00827bb0b7 235 cstate->serverstate != CHAPSS_RECHALLENGE) {
AdamGreen 0:3b00827bb0b7 236 return;
AdamGreen 0:3b00827bb0b7 237 }
AdamGreen 0:3b00827bb0b7 238
AdamGreen 0:3b00827bb0b7 239 if (cstate->chal_transmits >= cstate->max_transmits) {
AdamGreen 0:3b00827bb0b7 240 /* give up on peer */
AdamGreen 0:3b00827bb0b7 241 CHAPDEBUG(LOG_ERR, ("Peer failed to respond to CHAP challenge\n"));
AdamGreen 0:3b00827bb0b7 242 cstate->serverstate = CHAPSS_BADAUTH;
AdamGreen 0:3b00827bb0b7 243 auth_peer_fail(cstate->unit, PPP_CHAP);
AdamGreen 0:3b00827bb0b7 244 return;
AdamGreen 0:3b00827bb0b7 245 }
AdamGreen 0:3b00827bb0b7 246
AdamGreen 0:3b00827bb0b7 247 ChapSendChallenge(cstate); /* Re-send challenge */
AdamGreen 0:3b00827bb0b7 248 }
AdamGreen 0:3b00827bb0b7 249
AdamGreen 0:3b00827bb0b7 250
AdamGreen 0:3b00827bb0b7 251 /*
AdamGreen 0:3b00827bb0b7 252 * ChapResponseTimeout - Timeout expired on sending response.
AdamGreen 0:3b00827bb0b7 253 */
AdamGreen 0:3b00827bb0b7 254 static void
AdamGreen 0:3b00827bb0b7 255 ChapResponseTimeout(void *arg)
AdamGreen 0:3b00827bb0b7 256 {
AdamGreen 0:3b00827bb0b7 257 chap_state *cstate = (chap_state *) arg;
AdamGreen 0:3b00827bb0b7 258
AdamGreen 0:3b00827bb0b7 259 /* if we aren't sending a response, don't worry. */
AdamGreen 0:3b00827bb0b7 260 if (cstate->clientstate != CHAPCS_RESPONSE) {
AdamGreen 0:3b00827bb0b7 261 return;
AdamGreen 0:3b00827bb0b7 262 }
AdamGreen 0:3b00827bb0b7 263
AdamGreen 0:3b00827bb0b7 264 ChapSendResponse(cstate); /* re-send response */
AdamGreen 0:3b00827bb0b7 265 }
AdamGreen 0:3b00827bb0b7 266
AdamGreen 0:3b00827bb0b7 267
AdamGreen 0:3b00827bb0b7 268 /*
AdamGreen 0:3b00827bb0b7 269 * ChapRechallenge - Time to challenge the peer again.
AdamGreen 0:3b00827bb0b7 270 */
AdamGreen 0:3b00827bb0b7 271 static void
AdamGreen 0:3b00827bb0b7 272 ChapRechallenge(void *arg)
AdamGreen 0:3b00827bb0b7 273 {
AdamGreen 0:3b00827bb0b7 274 chap_state *cstate = (chap_state *) arg;
AdamGreen 0:3b00827bb0b7 275
AdamGreen 0:3b00827bb0b7 276 /* if we aren't sending a response, don't worry. */
AdamGreen 0:3b00827bb0b7 277 if (cstate->serverstate != CHAPSS_OPEN) {
AdamGreen 0:3b00827bb0b7 278 return;
AdamGreen 0:3b00827bb0b7 279 }
AdamGreen 0:3b00827bb0b7 280
AdamGreen 0:3b00827bb0b7 281 ChapGenChallenge(cstate);
AdamGreen 0:3b00827bb0b7 282 ChapSendChallenge(cstate);
AdamGreen 0:3b00827bb0b7 283 cstate->serverstate = CHAPSS_RECHALLENGE;
AdamGreen 0:3b00827bb0b7 284 }
AdamGreen 0:3b00827bb0b7 285
AdamGreen 0:3b00827bb0b7 286
AdamGreen 0:3b00827bb0b7 287 /*
AdamGreen 0:3b00827bb0b7 288 * ChapLowerUp - The lower layer is up.
AdamGreen 0:3b00827bb0b7 289 *
AdamGreen 0:3b00827bb0b7 290 * Start up if we have pending requests.
AdamGreen 0:3b00827bb0b7 291 */
AdamGreen 0:3b00827bb0b7 292 static void
AdamGreen 0:3b00827bb0b7 293 ChapLowerUp(int unit)
AdamGreen 0:3b00827bb0b7 294 {
AdamGreen 0:3b00827bb0b7 295 chap_state *cstate = &chap[unit];
AdamGreen 0:3b00827bb0b7 296
AdamGreen 0:3b00827bb0b7 297 if (cstate->clientstate == CHAPCS_INITIAL) {
AdamGreen 0:3b00827bb0b7 298 cstate->clientstate = CHAPCS_CLOSED;
AdamGreen 0:3b00827bb0b7 299 } else if (cstate->clientstate == CHAPCS_PENDING) {
AdamGreen 0:3b00827bb0b7 300 cstate->clientstate = CHAPCS_LISTEN;
AdamGreen 0:3b00827bb0b7 301 }
AdamGreen 0:3b00827bb0b7 302
AdamGreen 0:3b00827bb0b7 303 if (cstate->serverstate == CHAPSS_INITIAL) {
AdamGreen 0:3b00827bb0b7 304 cstate->serverstate = CHAPSS_CLOSED;
AdamGreen 0:3b00827bb0b7 305 } else if (cstate->serverstate == CHAPSS_PENDING) {
AdamGreen 0:3b00827bb0b7 306 ChapGenChallenge(cstate);
AdamGreen 0:3b00827bb0b7 307 ChapSendChallenge(cstate);
AdamGreen 0:3b00827bb0b7 308 cstate->serverstate = CHAPSS_INITIAL_CHAL;
AdamGreen 0:3b00827bb0b7 309 }
AdamGreen 0:3b00827bb0b7 310 }
AdamGreen 0:3b00827bb0b7 311
AdamGreen 0:3b00827bb0b7 312
AdamGreen 0:3b00827bb0b7 313 /*
AdamGreen 0:3b00827bb0b7 314 * ChapLowerDown - The lower layer is down.
AdamGreen 0:3b00827bb0b7 315 *
AdamGreen 0:3b00827bb0b7 316 * Cancel all timeouts.
AdamGreen 0:3b00827bb0b7 317 */
AdamGreen 0:3b00827bb0b7 318 static void
AdamGreen 0:3b00827bb0b7 319 ChapLowerDown(int unit)
AdamGreen 0:3b00827bb0b7 320 {
AdamGreen 0:3b00827bb0b7 321 chap_state *cstate = &chap[unit];
AdamGreen 0:3b00827bb0b7 322
AdamGreen 0:3b00827bb0b7 323 /* Timeout(s) pending? Cancel if so. */
AdamGreen 0:3b00827bb0b7 324 if (cstate->serverstate == CHAPSS_INITIAL_CHAL ||
AdamGreen 0:3b00827bb0b7 325 cstate->serverstate == CHAPSS_RECHALLENGE) {
AdamGreen 0:3b00827bb0b7 326 UNTIMEOUT(ChapChallengeTimeout, cstate);
AdamGreen 0:3b00827bb0b7 327 } else if (cstate->serverstate == CHAPSS_OPEN
AdamGreen 0:3b00827bb0b7 328 && cstate->chal_interval != 0) {
AdamGreen 0:3b00827bb0b7 329 UNTIMEOUT(ChapRechallenge, cstate);
AdamGreen 0:3b00827bb0b7 330 }
AdamGreen 0:3b00827bb0b7 331 if (cstate->clientstate == CHAPCS_RESPONSE) {
AdamGreen 0:3b00827bb0b7 332 UNTIMEOUT(ChapResponseTimeout, cstate);
AdamGreen 0:3b00827bb0b7 333 }
AdamGreen 0:3b00827bb0b7 334 cstate->clientstate = CHAPCS_INITIAL;
AdamGreen 0:3b00827bb0b7 335 cstate->serverstate = CHAPSS_INITIAL;
AdamGreen 0:3b00827bb0b7 336 }
AdamGreen 0:3b00827bb0b7 337
AdamGreen 0:3b00827bb0b7 338
AdamGreen 0:3b00827bb0b7 339 /*
AdamGreen 0:3b00827bb0b7 340 * ChapProtocolReject - Peer doesn't grok CHAP.
AdamGreen 0:3b00827bb0b7 341 */
AdamGreen 0:3b00827bb0b7 342 static void
AdamGreen 0:3b00827bb0b7 343 ChapProtocolReject(int unit)
AdamGreen 0:3b00827bb0b7 344 {
AdamGreen 0:3b00827bb0b7 345 chap_state *cstate = &chap[unit];
AdamGreen 0:3b00827bb0b7 346
AdamGreen 0:3b00827bb0b7 347 if (cstate->serverstate != CHAPSS_INITIAL &&
AdamGreen 0:3b00827bb0b7 348 cstate->serverstate != CHAPSS_CLOSED) {
AdamGreen 0:3b00827bb0b7 349 auth_peer_fail(unit, PPP_CHAP);
AdamGreen 0:3b00827bb0b7 350 }
AdamGreen 0:3b00827bb0b7 351 if (cstate->clientstate != CHAPCS_INITIAL &&
AdamGreen 0:3b00827bb0b7 352 cstate->clientstate != CHAPCS_CLOSED) {
AdamGreen 0:3b00827bb0b7 353 auth_withpeer_fail(unit, PPP_CHAP); /* lwip: just sets the PPP error code on this unit to PPPERR_AUTHFAIL */
AdamGreen 0:3b00827bb0b7 354 }
AdamGreen 0:3b00827bb0b7 355 ChapLowerDown(unit); /* shutdown chap */
AdamGreen 0:3b00827bb0b7 356 }
AdamGreen 0:3b00827bb0b7 357
AdamGreen 0:3b00827bb0b7 358
AdamGreen 0:3b00827bb0b7 359 /*
AdamGreen 0:3b00827bb0b7 360 * ChapInput - Input CHAP packet.
AdamGreen 0:3b00827bb0b7 361 */
AdamGreen 0:3b00827bb0b7 362 static void
AdamGreen 0:3b00827bb0b7 363 ChapInput(int unit, u_char *inpacket, int packet_len)
AdamGreen 0:3b00827bb0b7 364 {
AdamGreen 0:3b00827bb0b7 365 chap_state *cstate = &chap[unit];
AdamGreen 0:3b00827bb0b7 366 u_char *inp;
AdamGreen 0:3b00827bb0b7 367 u_char code, id;
AdamGreen 0:3b00827bb0b7 368 int len;
AdamGreen 0:3b00827bb0b7 369
AdamGreen 0:3b00827bb0b7 370 /*
AdamGreen 0:3b00827bb0b7 371 * Parse header (code, id and length).
AdamGreen 0:3b00827bb0b7 372 * If packet too short, drop it.
AdamGreen 0:3b00827bb0b7 373 */
AdamGreen 0:3b00827bb0b7 374 inp = inpacket;
AdamGreen 0:3b00827bb0b7 375 if (packet_len < CHAP_HEADERLEN) {
AdamGreen 0:3b00827bb0b7 376 CHAPDEBUG(LOG_INFO, ("ChapInput: rcvd short header.\n"));
AdamGreen 0:3b00827bb0b7 377 return;
AdamGreen 0:3b00827bb0b7 378 }
AdamGreen 0:3b00827bb0b7 379 GETCHAR(code, inp);
AdamGreen 0:3b00827bb0b7 380 GETCHAR(id, inp);
AdamGreen 0:3b00827bb0b7 381 GETSHORT(len, inp);
AdamGreen 0:3b00827bb0b7 382 if (len < CHAP_HEADERLEN) {
AdamGreen 0:3b00827bb0b7 383 CHAPDEBUG(LOG_INFO, ("ChapInput: rcvd illegal length.\n"));
AdamGreen 0:3b00827bb0b7 384 return;
AdamGreen 0:3b00827bb0b7 385 }
AdamGreen 0:3b00827bb0b7 386 if (len > packet_len) {
AdamGreen 0:3b00827bb0b7 387 CHAPDEBUG(LOG_INFO, ("ChapInput: rcvd short packet.\n"));
AdamGreen 0:3b00827bb0b7 388 return;
AdamGreen 0:3b00827bb0b7 389 }
AdamGreen 0:3b00827bb0b7 390 len -= CHAP_HEADERLEN;
AdamGreen 0:3b00827bb0b7 391
AdamGreen 0:3b00827bb0b7 392 /*
AdamGreen 0:3b00827bb0b7 393 * Action depends on code (as in fact it usually does :-).
AdamGreen 0:3b00827bb0b7 394 */
AdamGreen 0:3b00827bb0b7 395 switch (code) {
AdamGreen 0:3b00827bb0b7 396 case CHAP_CHALLENGE:
AdamGreen 0:3b00827bb0b7 397 ChapReceiveChallenge(cstate, inp, id, len);
AdamGreen 0:3b00827bb0b7 398 break;
AdamGreen 0:3b00827bb0b7 399
AdamGreen 0:3b00827bb0b7 400 case CHAP_RESPONSE:
AdamGreen 0:3b00827bb0b7 401 ChapReceiveResponse(cstate, inp, id, len);
AdamGreen 0:3b00827bb0b7 402 break;
AdamGreen 0:3b00827bb0b7 403
AdamGreen 0:3b00827bb0b7 404 case CHAP_FAILURE:
AdamGreen 0:3b00827bb0b7 405 ChapReceiveFailure(cstate, inp, id, len);
AdamGreen 0:3b00827bb0b7 406 break;
AdamGreen 0:3b00827bb0b7 407
AdamGreen 0:3b00827bb0b7 408 case CHAP_SUCCESS:
AdamGreen 0:3b00827bb0b7 409 ChapReceiveSuccess(cstate, inp, id, len);
AdamGreen 0:3b00827bb0b7 410 break;
AdamGreen 0:3b00827bb0b7 411
AdamGreen 0:3b00827bb0b7 412 default: /* Need code reject? */
AdamGreen 0:3b00827bb0b7 413 CHAPDEBUG(LOG_WARNING, ("Unknown CHAP code (%d) received.\n", code));
AdamGreen 0:3b00827bb0b7 414 break;
AdamGreen 0:3b00827bb0b7 415 }
AdamGreen 0:3b00827bb0b7 416 }
AdamGreen 0:3b00827bb0b7 417
AdamGreen 0:3b00827bb0b7 418
AdamGreen 0:3b00827bb0b7 419 /*
AdamGreen 0:3b00827bb0b7 420 * ChapReceiveChallenge - Receive Challenge and send Response.
AdamGreen 0:3b00827bb0b7 421 */
AdamGreen 0:3b00827bb0b7 422 static void
AdamGreen 0:3b00827bb0b7 423 ChapReceiveChallenge(chap_state *cstate, u_char *inp, u_char id, int len)
AdamGreen 0:3b00827bb0b7 424 {
AdamGreen 0:3b00827bb0b7 425 int rchallenge_len;
AdamGreen 0:3b00827bb0b7 426 u_char *rchallenge;
AdamGreen 0:3b00827bb0b7 427 int secret_len;
AdamGreen 0:3b00827bb0b7 428 char secret[MAXSECRETLEN];
AdamGreen 0:3b00827bb0b7 429 char rhostname[256];
AdamGreen 0:3b00827bb0b7 430 MD5_CTX mdContext;
AdamGreen 0:3b00827bb0b7 431 u_char hash[MD5_SIGNATURE_SIZE];
AdamGreen 0:3b00827bb0b7 432
AdamGreen 0:3b00827bb0b7 433 CHAPDEBUG(LOG_INFO, ("ChapReceiveChallenge: Rcvd id %d.\n", id));
AdamGreen 0:3b00827bb0b7 434 if (cstate->clientstate == CHAPCS_CLOSED ||
AdamGreen 0:3b00827bb0b7 435 cstate->clientstate == CHAPCS_PENDING) {
AdamGreen 0:3b00827bb0b7 436 CHAPDEBUG(LOG_INFO, ("ChapReceiveChallenge: in state %d\n",
AdamGreen 0:3b00827bb0b7 437 cstate->clientstate));
AdamGreen 0:3b00827bb0b7 438 return;
AdamGreen 0:3b00827bb0b7 439 }
AdamGreen 0:3b00827bb0b7 440
AdamGreen 0:3b00827bb0b7 441 if (len < 2) {
AdamGreen 0:3b00827bb0b7 442 CHAPDEBUG(LOG_INFO, ("ChapReceiveChallenge: rcvd short packet.\n"));
AdamGreen 0:3b00827bb0b7 443 return;
AdamGreen 0:3b00827bb0b7 444 }
AdamGreen 0:3b00827bb0b7 445
AdamGreen 0:3b00827bb0b7 446 GETCHAR(rchallenge_len, inp);
AdamGreen 0:3b00827bb0b7 447 len -= sizeof (u_char) + rchallenge_len; /* now name field length */
AdamGreen 0:3b00827bb0b7 448 if (len < 0) {
AdamGreen 0:3b00827bb0b7 449 CHAPDEBUG(LOG_INFO, ("ChapReceiveChallenge: rcvd short packet.\n"));
AdamGreen 0:3b00827bb0b7 450 return;
AdamGreen 0:3b00827bb0b7 451 }
AdamGreen 0:3b00827bb0b7 452 rchallenge = inp;
AdamGreen 0:3b00827bb0b7 453 INCPTR(rchallenge_len, inp);
AdamGreen 0:3b00827bb0b7 454
AdamGreen 0:3b00827bb0b7 455 if (len >= (int)sizeof(rhostname)) {
AdamGreen 0:3b00827bb0b7 456 len = sizeof(rhostname) - 1;
AdamGreen 0:3b00827bb0b7 457 }
AdamGreen 0:3b00827bb0b7 458 BCOPY(inp, rhostname, len);
AdamGreen 0:3b00827bb0b7 459 rhostname[len] = '\000';
AdamGreen 0:3b00827bb0b7 460
AdamGreen 0:3b00827bb0b7 461 CHAPDEBUG(LOG_INFO, ("ChapReceiveChallenge: received name field '%s'\n",
AdamGreen 0:3b00827bb0b7 462 rhostname));
AdamGreen 0:3b00827bb0b7 463
AdamGreen 0:3b00827bb0b7 464 /* Microsoft doesn't send their name back in the PPP packet */
AdamGreen 0:3b00827bb0b7 465 if (ppp_settings.remote_name[0] != 0 && (ppp_settings.explicit_remote || rhostname[0] == 0)) {
AdamGreen 0:3b00827bb0b7 466 strncpy(rhostname, ppp_settings.remote_name, sizeof(rhostname));
AdamGreen 0:3b00827bb0b7 467 rhostname[sizeof(rhostname) - 1] = 0;
AdamGreen 0:3b00827bb0b7 468 CHAPDEBUG(LOG_INFO, ("ChapReceiveChallenge: using '%s' as remote name\n",
AdamGreen 0:3b00827bb0b7 469 rhostname));
AdamGreen 0:3b00827bb0b7 470 }
AdamGreen 0:3b00827bb0b7 471
AdamGreen 0:3b00827bb0b7 472 /* get secret for authenticating ourselves with the specified host */
AdamGreen 0:3b00827bb0b7 473 if (!get_secret(cstate->unit, cstate->resp_name, rhostname,
AdamGreen 0:3b00827bb0b7 474 secret, &secret_len, 0)) {
AdamGreen 0:3b00827bb0b7 475 secret_len = 0; /* assume null secret if can't find one */
AdamGreen 0:3b00827bb0b7 476 CHAPDEBUG(LOG_WARNING, ("No CHAP secret found for authenticating us to %s\n",
AdamGreen 0:3b00827bb0b7 477 rhostname));
AdamGreen 0:3b00827bb0b7 478 }
AdamGreen 0:3b00827bb0b7 479
AdamGreen 0:3b00827bb0b7 480 /* cancel response send timeout if necessary */
AdamGreen 0:3b00827bb0b7 481 if (cstate->clientstate == CHAPCS_RESPONSE) {
AdamGreen 0:3b00827bb0b7 482 UNTIMEOUT(ChapResponseTimeout, cstate);
AdamGreen 0:3b00827bb0b7 483 }
AdamGreen 0:3b00827bb0b7 484
AdamGreen 0:3b00827bb0b7 485 cstate->resp_id = id;
AdamGreen 0:3b00827bb0b7 486 cstate->resp_transmits = 0;
AdamGreen 0:3b00827bb0b7 487
AdamGreen 0:3b00827bb0b7 488 /* generate MD based on negotiated type */
AdamGreen 0:3b00827bb0b7 489 switch (cstate->resp_type) {
AdamGreen 0:3b00827bb0b7 490
AdamGreen 0:3b00827bb0b7 491 case CHAP_DIGEST_MD5:
AdamGreen 0:3b00827bb0b7 492 MD5Init(&mdContext);
AdamGreen 0:3b00827bb0b7 493 MD5Update(&mdContext, &cstate->resp_id, 1);
AdamGreen 0:3b00827bb0b7 494 MD5Update(&mdContext, (u_char*)secret, secret_len);
AdamGreen 0:3b00827bb0b7 495 MD5Update(&mdContext, rchallenge, rchallenge_len);
AdamGreen 0:3b00827bb0b7 496 MD5Final(hash, &mdContext);
AdamGreen 0:3b00827bb0b7 497 BCOPY(hash, cstate->response, MD5_SIGNATURE_SIZE);
AdamGreen 0:3b00827bb0b7 498 cstate->resp_length = MD5_SIGNATURE_SIZE;
AdamGreen 0:3b00827bb0b7 499 break;
AdamGreen 0:3b00827bb0b7 500
AdamGreen 0:3b00827bb0b7 501 #if MSCHAP_SUPPORT
AdamGreen 0:3b00827bb0b7 502 case CHAP_MICROSOFT:
AdamGreen 0:3b00827bb0b7 503 ChapMS(cstate, rchallenge, rchallenge_len, secret, secret_len);
AdamGreen 0:3b00827bb0b7 504 break;
AdamGreen 0:3b00827bb0b7 505 #endif
AdamGreen 0:3b00827bb0b7 506
AdamGreen 0:3b00827bb0b7 507 default:
AdamGreen 0:3b00827bb0b7 508 CHAPDEBUG(LOG_INFO, ("unknown digest type %d\n", cstate->resp_type));
AdamGreen 0:3b00827bb0b7 509 return;
AdamGreen 0:3b00827bb0b7 510 }
AdamGreen 0:3b00827bb0b7 511
AdamGreen 0:3b00827bb0b7 512 BZERO(secret, sizeof(secret));
AdamGreen 0:3b00827bb0b7 513 ChapSendResponse(cstate);
AdamGreen 0:3b00827bb0b7 514 }
AdamGreen 0:3b00827bb0b7 515
AdamGreen 0:3b00827bb0b7 516
AdamGreen 0:3b00827bb0b7 517 /*
AdamGreen 0:3b00827bb0b7 518 * ChapReceiveResponse - Receive and process response.
AdamGreen 0:3b00827bb0b7 519 */
AdamGreen 0:3b00827bb0b7 520 static void
AdamGreen 0:3b00827bb0b7 521 ChapReceiveResponse(chap_state *cstate, u_char *inp, int id, int len)
AdamGreen 0:3b00827bb0b7 522 {
AdamGreen 0:3b00827bb0b7 523 u_char *remmd, remmd_len;
AdamGreen 0:3b00827bb0b7 524 int secret_len, old_state;
AdamGreen 0:3b00827bb0b7 525 int code;
AdamGreen 0:3b00827bb0b7 526 char rhostname[256];
AdamGreen 0:3b00827bb0b7 527 MD5_CTX mdContext;
AdamGreen 0:3b00827bb0b7 528 char secret[MAXSECRETLEN];
AdamGreen 0:3b00827bb0b7 529 u_char hash[MD5_SIGNATURE_SIZE];
AdamGreen 0:3b00827bb0b7 530
AdamGreen 0:3b00827bb0b7 531 CHAPDEBUG(LOG_INFO, ("ChapReceiveResponse: Rcvd id %d.\n", id));
AdamGreen 0:3b00827bb0b7 532
AdamGreen 0:3b00827bb0b7 533 if (cstate->serverstate == CHAPSS_CLOSED ||
AdamGreen 0:3b00827bb0b7 534 cstate->serverstate == CHAPSS_PENDING) {
AdamGreen 0:3b00827bb0b7 535 CHAPDEBUG(LOG_INFO, ("ChapReceiveResponse: in state %d\n",
AdamGreen 0:3b00827bb0b7 536 cstate->serverstate));
AdamGreen 0:3b00827bb0b7 537 return;
AdamGreen 0:3b00827bb0b7 538 }
AdamGreen 0:3b00827bb0b7 539
AdamGreen 0:3b00827bb0b7 540 if (id != cstate->chal_id) {
AdamGreen 0:3b00827bb0b7 541 return; /* doesn't match ID of last challenge */
AdamGreen 0:3b00827bb0b7 542 }
AdamGreen 0:3b00827bb0b7 543
AdamGreen 0:3b00827bb0b7 544 /*
AdamGreen 0:3b00827bb0b7 545 * If we have received a duplicate or bogus Response,
AdamGreen 0:3b00827bb0b7 546 * we have to send the same answer (Success/Failure)
AdamGreen 0:3b00827bb0b7 547 * as we did for the first Response we saw.
AdamGreen 0:3b00827bb0b7 548 */
AdamGreen 0:3b00827bb0b7 549 if (cstate->serverstate == CHAPSS_OPEN) {
AdamGreen 0:3b00827bb0b7 550 ChapSendStatus(cstate, CHAP_SUCCESS);
AdamGreen 0:3b00827bb0b7 551 return;
AdamGreen 0:3b00827bb0b7 552 }
AdamGreen 0:3b00827bb0b7 553 if (cstate->serverstate == CHAPSS_BADAUTH) {
AdamGreen 0:3b00827bb0b7 554 ChapSendStatus(cstate, CHAP_FAILURE);
AdamGreen 0:3b00827bb0b7 555 return;
AdamGreen 0:3b00827bb0b7 556 }
AdamGreen 0:3b00827bb0b7 557
AdamGreen 0:3b00827bb0b7 558 if (len < 2) {
AdamGreen 0:3b00827bb0b7 559 CHAPDEBUG(LOG_INFO, ("ChapReceiveResponse: rcvd short packet.\n"));
AdamGreen 0:3b00827bb0b7 560 return;
AdamGreen 0:3b00827bb0b7 561 }
AdamGreen 0:3b00827bb0b7 562 GETCHAR(remmd_len, inp); /* get length of MD */
AdamGreen 0:3b00827bb0b7 563 remmd = inp; /* get pointer to MD */
AdamGreen 0:3b00827bb0b7 564 INCPTR(remmd_len, inp);
AdamGreen 0:3b00827bb0b7 565
AdamGreen 0:3b00827bb0b7 566 len -= sizeof (u_char) + remmd_len;
AdamGreen 0:3b00827bb0b7 567 if (len < 0) {
AdamGreen 0:3b00827bb0b7 568 CHAPDEBUG(LOG_INFO, ("ChapReceiveResponse: rcvd short packet.\n"));
AdamGreen 0:3b00827bb0b7 569 return;
AdamGreen 0:3b00827bb0b7 570 }
AdamGreen 0:3b00827bb0b7 571
AdamGreen 0:3b00827bb0b7 572 UNTIMEOUT(ChapChallengeTimeout, cstate);
AdamGreen 0:3b00827bb0b7 573
AdamGreen 0:3b00827bb0b7 574 if (len >= (int)sizeof(rhostname)) {
AdamGreen 0:3b00827bb0b7 575 len = sizeof(rhostname) - 1;
AdamGreen 0:3b00827bb0b7 576 }
AdamGreen 0:3b00827bb0b7 577 BCOPY(inp, rhostname, len);
AdamGreen 0:3b00827bb0b7 578 rhostname[len] = '\000';
AdamGreen 0:3b00827bb0b7 579
AdamGreen 0:3b00827bb0b7 580 CHAPDEBUG(LOG_INFO, ("ChapReceiveResponse: received name field: %s\n",
AdamGreen 0:3b00827bb0b7 581 rhostname));
AdamGreen 0:3b00827bb0b7 582
AdamGreen 0:3b00827bb0b7 583 /*
AdamGreen 0:3b00827bb0b7 584 * Get secret for authenticating them with us,
AdamGreen 0:3b00827bb0b7 585 * do the hash ourselves, and compare the result.
AdamGreen 0:3b00827bb0b7 586 */
AdamGreen 0:3b00827bb0b7 587 code = CHAP_FAILURE;
AdamGreen 0:3b00827bb0b7 588 if (!get_secret(cstate->unit, rhostname, cstate->chal_name,
AdamGreen 0:3b00827bb0b7 589 secret, &secret_len, 1)) {
AdamGreen 0:3b00827bb0b7 590 CHAPDEBUG(LOG_WARNING, ("No CHAP secret found for authenticating %s\n",
AdamGreen 0:3b00827bb0b7 591 rhostname));
AdamGreen 0:3b00827bb0b7 592 } else {
AdamGreen 0:3b00827bb0b7 593 /* generate MD based on negotiated type */
AdamGreen 0:3b00827bb0b7 594 switch (cstate->chal_type) {
AdamGreen 0:3b00827bb0b7 595
AdamGreen 0:3b00827bb0b7 596 case CHAP_DIGEST_MD5: /* only MD5 is defined for now */
AdamGreen 0:3b00827bb0b7 597 if (remmd_len != MD5_SIGNATURE_SIZE) {
AdamGreen 0:3b00827bb0b7 598 break; /* it's not even the right length */
AdamGreen 0:3b00827bb0b7 599 }
AdamGreen 0:3b00827bb0b7 600 MD5Init(&mdContext);
AdamGreen 0:3b00827bb0b7 601 MD5Update(&mdContext, &cstate->chal_id, 1);
AdamGreen 0:3b00827bb0b7 602 MD5Update(&mdContext, (u_char*)secret, secret_len);
AdamGreen 0:3b00827bb0b7 603 MD5Update(&mdContext, cstate->challenge, cstate->chal_len);
AdamGreen 0:3b00827bb0b7 604 MD5Final(hash, &mdContext);
AdamGreen 0:3b00827bb0b7 605
AdamGreen 0:3b00827bb0b7 606 /* compare local and remote MDs and send the appropriate status */
AdamGreen 0:3b00827bb0b7 607 if (memcmp (hash, remmd, MD5_SIGNATURE_SIZE) == 0) {
AdamGreen 0:3b00827bb0b7 608 code = CHAP_SUCCESS; /* they are the same! */
AdamGreen 0:3b00827bb0b7 609 }
AdamGreen 0:3b00827bb0b7 610 break;
AdamGreen 0:3b00827bb0b7 611
AdamGreen 0:3b00827bb0b7 612 default:
AdamGreen 0:3b00827bb0b7 613 CHAPDEBUG(LOG_INFO, ("unknown digest type %d\n", cstate->chal_type));
AdamGreen 0:3b00827bb0b7 614 }
AdamGreen 0:3b00827bb0b7 615 }
AdamGreen 0:3b00827bb0b7 616
AdamGreen 0:3b00827bb0b7 617 BZERO(secret, sizeof(secret));
AdamGreen 0:3b00827bb0b7 618 ChapSendStatus(cstate, code);
AdamGreen 0:3b00827bb0b7 619
AdamGreen 0:3b00827bb0b7 620 if (code == CHAP_SUCCESS) {
AdamGreen 0:3b00827bb0b7 621 old_state = cstate->serverstate;
AdamGreen 0:3b00827bb0b7 622 cstate->serverstate = CHAPSS_OPEN;
AdamGreen 0:3b00827bb0b7 623 if (old_state == CHAPSS_INITIAL_CHAL) {
AdamGreen 0:3b00827bb0b7 624 auth_peer_success(cstate->unit, PPP_CHAP, rhostname, len);
AdamGreen 0:3b00827bb0b7 625 }
AdamGreen 0:3b00827bb0b7 626 if (cstate->chal_interval != 0) {
AdamGreen 0:3b00827bb0b7 627 TIMEOUT(ChapRechallenge, cstate, cstate->chal_interval);
AdamGreen 0:3b00827bb0b7 628 }
AdamGreen 0:3b00827bb0b7 629 } else {
AdamGreen 0:3b00827bb0b7 630 CHAPDEBUG(LOG_ERR, ("CHAP peer authentication failed\n"));
AdamGreen 0:3b00827bb0b7 631 cstate->serverstate = CHAPSS_BADAUTH;
AdamGreen 0:3b00827bb0b7 632 auth_peer_fail(cstate->unit, PPP_CHAP);
AdamGreen 0:3b00827bb0b7 633 }
AdamGreen 0:3b00827bb0b7 634 }
AdamGreen 0:3b00827bb0b7 635
AdamGreen 0:3b00827bb0b7 636 /*
AdamGreen 0:3b00827bb0b7 637 * ChapReceiveSuccess - Receive Success
AdamGreen 0:3b00827bb0b7 638 */
AdamGreen 0:3b00827bb0b7 639 static void
AdamGreen 0:3b00827bb0b7 640 ChapReceiveSuccess(chap_state *cstate, u_char *inp, u_char id, int len)
AdamGreen 0:3b00827bb0b7 641 {
AdamGreen 0:3b00827bb0b7 642 LWIP_UNUSED_ARG(id);
AdamGreen 0:3b00827bb0b7 643 LWIP_UNUSED_ARG(inp);
AdamGreen 0:3b00827bb0b7 644
AdamGreen 0:3b00827bb0b7 645 CHAPDEBUG(LOG_INFO, ("ChapReceiveSuccess: Rcvd id %d.\n", id));
AdamGreen 0:3b00827bb0b7 646
AdamGreen 0:3b00827bb0b7 647 if (cstate->clientstate == CHAPCS_OPEN) {
AdamGreen 0:3b00827bb0b7 648 /* presumably an answer to a duplicate response */
AdamGreen 0:3b00827bb0b7 649 return;
AdamGreen 0:3b00827bb0b7 650 }
AdamGreen 0:3b00827bb0b7 651
AdamGreen 0:3b00827bb0b7 652 if (cstate->clientstate != CHAPCS_RESPONSE) {
AdamGreen 0:3b00827bb0b7 653 /* don't know what this is */
AdamGreen 0:3b00827bb0b7 654 CHAPDEBUG(LOG_INFO, ("ChapReceiveSuccess: in state %d\n",
AdamGreen 0:3b00827bb0b7 655 cstate->clientstate));
AdamGreen 0:3b00827bb0b7 656 return;
AdamGreen 0:3b00827bb0b7 657 }
AdamGreen 0:3b00827bb0b7 658
AdamGreen 0:3b00827bb0b7 659 UNTIMEOUT(ChapResponseTimeout, cstate);
AdamGreen 0:3b00827bb0b7 660
AdamGreen 0:3b00827bb0b7 661 /*
AdamGreen 0:3b00827bb0b7 662 * Print message.
AdamGreen 0:3b00827bb0b7 663 */
AdamGreen 0:3b00827bb0b7 664 if (len > 0) {
AdamGreen 0:3b00827bb0b7 665 PRINTMSG(inp, len);
AdamGreen 0:3b00827bb0b7 666 }
AdamGreen 0:3b00827bb0b7 667
AdamGreen 0:3b00827bb0b7 668 cstate->clientstate = CHAPCS_OPEN;
AdamGreen 0:3b00827bb0b7 669
AdamGreen 0:3b00827bb0b7 670 auth_withpeer_success(cstate->unit, PPP_CHAP);
AdamGreen 0:3b00827bb0b7 671 }
AdamGreen 0:3b00827bb0b7 672
AdamGreen 0:3b00827bb0b7 673
AdamGreen 0:3b00827bb0b7 674 /*
AdamGreen 0:3b00827bb0b7 675 * ChapReceiveFailure - Receive failure.
AdamGreen 0:3b00827bb0b7 676 */
AdamGreen 0:3b00827bb0b7 677 static void
AdamGreen 0:3b00827bb0b7 678 ChapReceiveFailure(chap_state *cstate, u_char *inp, u_char id, int len)
AdamGreen 0:3b00827bb0b7 679 {
AdamGreen 0:3b00827bb0b7 680 LWIP_UNUSED_ARG(id);
AdamGreen 0:3b00827bb0b7 681 LWIP_UNUSED_ARG(inp);
AdamGreen 0:3b00827bb0b7 682
AdamGreen 0:3b00827bb0b7 683 CHAPDEBUG(LOG_INFO, ("ChapReceiveFailure: Rcvd id %d.\n", id));
AdamGreen 0:3b00827bb0b7 684
AdamGreen 0:3b00827bb0b7 685 if (cstate->clientstate != CHAPCS_RESPONSE) {
AdamGreen 0:3b00827bb0b7 686 /* don't know what this is */
AdamGreen 0:3b00827bb0b7 687 CHAPDEBUG(LOG_INFO, ("ChapReceiveFailure: in state %d\n",
AdamGreen 0:3b00827bb0b7 688 cstate->clientstate));
AdamGreen 0:3b00827bb0b7 689 return;
AdamGreen 0:3b00827bb0b7 690 }
AdamGreen 0:3b00827bb0b7 691
AdamGreen 0:3b00827bb0b7 692 UNTIMEOUT(ChapResponseTimeout, cstate);
AdamGreen 0:3b00827bb0b7 693
AdamGreen 0:3b00827bb0b7 694 /*
AdamGreen 0:3b00827bb0b7 695 * Print message.
AdamGreen 0:3b00827bb0b7 696 */
AdamGreen 0:3b00827bb0b7 697 if (len > 0) {
AdamGreen 0:3b00827bb0b7 698 PRINTMSG(inp, len);
AdamGreen 0:3b00827bb0b7 699 }
AdamGreen 0:3b00827bb0b7 700
AdamGreen 0:3b00827bb0b7 701 CHAPDEBUG(LOG_ERR, ("CHAP authentication failed\n"));
AdamGreen 0:3b00827bb0b7 702 auth_withpeer_fail(cstate->unit, PPP_CHAP); /* lwip: just sets the PPP error code on this unit to PPPERR_AUTHFAIL */
AdamGreen 0:3b00827bb0b7 703 }
AdamGreen 0:3b00827bb0b7 704
AdamGreen 0:3b00827bb0b7 705
AdamGreen 0:3b00827bb0b7 706 /*
AdamGreen 0:3b00827bb0b7 707 * ChapSendChallenge - Send an Authenticate challenge.
AdamGreen 0:3b00827bb0b7 708 */
AdamGreen 0:3b00827bb0b7 709 static void
AdamGreen 0:3b00827bb0b7 710 ChapSendChallenge(chap_state *cstate)
AdamGreen 0:3b00827bb0b7 711 {
AdamGreen 0:3b00827bb0b7 712 u_char *outp;
AdamGreen 0:3b00827bb0b7 713 int chal_len, name_len;
AdamGreen 0:3b00827bb0b7 714 int outlen;
AdamGreen 0:3b00827bb0b7 715
AdamGreen 0:3b00827bb0b7 716 chal_len = cstate->chal_len;
AdamGreen 0:3b00827bb0b7 717 name_len = (int)strlen(cstate->chal_name);
AdamGreen 0:3b00827bb0b7 718 outlen = CHAP_HEADERLEN + sizeof (u_char) + chal_len + name_len;
AdamGreen 0:3b00827bb0b7 719 outp = outpacket_buf[cstate->unit];
AdamGreen 0:3b00827bb0b7 720
AdamGreen 0:3b00827bb0b7 721 MAKEHEADER(outp, PPP_CHAP); /* paste in a CHAP header */
AdamGreen 0:3b00827bb0b7 722
AdamGreen 0:3b00827bb0b7 723 PUTCHAR(CHAP_CHALLENGE, outp);
AdamGreen 0:3b00827bb0b7 724 PUTCHAR(cstate->chal_id, outp);
AdamGreen 0:3b00827bb0b7 725 PUTSHORT(outlen, outp);
AdamGreen 0:3b00827bb0b7 726
AdamGreen 0:3b00827bb0b7 727 PUTCHAR(chal_len, outp); /* put length of challenge */
AdamGreen 0:3b00827bb0b7 728 BCOPY(cstate->challenge, outp, chal_len);
AdamGreen 0:3b00827bb0b7 729 INCPTR(chal_len, outp);
AdamGreen 0:3b00827bb0b7 730
AdamGreen 0:3b00827bb0b7 731 BCOPY(cstate->chal_name, outp, name_len); /* append hostname */
AdamGreen 0:3b00827bb0b7 732
AdamGreen 0:3b00827bb0b7 733 pppWrite(cstate->unit, outpacket_buf[cstate->unit], outlen + PPP_HDRLEN);
AdamGreen 0:3b00827bb0b7 734
AdamGreen 0:3b00827bb0b7 735 CHAPDEBUG(LOG_INFO, ("ChapSendChallenge: Sent id %d.\n", cstate->chal_id));
AdamGreen 0:3b00827bb0b7 736
AdamGreen 0:3b00827bb0b7 737 TIMEOUT(ChapChallengeTimeout, cstate, cstate->timeouttime);
AdamGreen 0:3b00827bb0b7 738 ++cstate->chal_transmits;
AdamGreen 0:3b00827bb0b7 739 }
AdamGreen 0:3b00827bb0b7 740
AdamGreen 0:3b00827bb0b7 741
AdamGreen 0:3b00827bb0b7 742 /*
AdamGreen 0:3b00827bb0b7 743 * ChapSendStatus - Send a status response (ack or nak).
AdamGreen 0:3b00827bb0b7 744 */
AdamGreen 0:3b00827bb0b7 745 static void
AdamGreen 0:3b00827bb0b7 746 ChapSendStatus(chap_state *cstate, int code)
AdamGreen 0:3b00827bb0b7 747 {
AdamGreen 0:3b00827bb0b7 748 u_char *outp;
AdamGreen 0:3b00827bb0b7 749 int outlen, msglen;
AdamGreen 0:3b00827bb0b7 750 char msg[256]; /* @todo: this can be a char*, no strcpy needed */
AdamGreen 0:3b00827bb0b7 751
AdamGreen 0:3b00827bb0b7 752 if (code == CHAP_SUCCESS) {
AdamGreen 0:3b00827bb0b7 753 strcpy(msg, "Welcome!");
AdamGreen 0:3b00827bb0b7 754 } else {
AdamGreen 0:3b00827bb0b7 755 strcpy(msg, "I don't like you. Go 'way.");
AdamGreen 0:3b00827bb0b7 756 }
AdamGreen 0:3b00827bb0b7 757 msglen = (int)strlen(msg);
AdamGreen 0:3b00827bb0b7 758
AdamGreen 0:3b00827bb0b7 759 outlen = CHAP_HEADERLEN + msglen;
AdamGreen 0:3b00827bb0b7 760 outp = outpacket_buf[cstate->unit];
AdamGreen 0:3b00827bb0b7 761
AdamGreen 0:3b00827bb0b7 762 MAKEHEADER(outp, PPP_CHAP); /* paste in a header */
AdamGreen 0:3b00827bb0b7 763
AdamGreen 0:3b00827bb0b7 764 PUTCHAR(code, outp);
AdamGreen 0:3b00827bb0b7 765 PUTCHAR(cstate->chal_id, outp);
AdamGreen 0:3b00827bb0b7 766 PUTSHORT(outlen, outp);
AdamGreen 0:3b00827bb0b7 767 BCOPY(msg, outp, msglen);
AdamGreen 0:3b00827bb0b7 768 pppWrite(cstate->unit, outpacket_buf[cstate->unit], outlen + PPP_HDRLEN);
AdamGreen 0:3b00827bb0b7 769
AdamGreen 0:3b00827bb0b7 770 CHAPDEBUG(LOG_INFO, ("ChapSendStatus: Sent code %d, id %d.\n", code,
AdamGreen 0:3b00827bb0b7 771 cstate->chal_id));
AdamGreen 0:3b00827bb0b7 772 }
AdamGreen 0:3b00827bb0b7 773
AdamGreen 0:3b00827bb0b7 774 /*
AdamGreen 0:3b00827bb0b7 775 * ChapGenChallenge is used to generate a pseudo-random challenge string of
AdamGreen 0:3b00827bb0b7 776 * a pseudo-random length between min_len and max_len. The challenge
AdamGreen 0:3b00827bb0b7 777 * string and its length are stored in *cstate, and various other fields of
AdamGreen 0:3b00827bb0b7 778 * *cstate are initialized.
AdamGreen 0:3b00827bb0b7 779 */
AdamGreen 0:3b00827bb0b7 780
AdamGreen 0:3b00827bb0b7 781 static void
AdamGreen 0:3b00827bb0b7 782 ChapGenChallenge(chap_state *cstate)
AdamGreen 0:3b00827bb0b7 783 {
AdamGreen 0:3b00827bb0b7 784 int chal_len;
AdamGreen 0:3b00827bb0b7 785 u_char *ptr = cstate->challenge;
AdamGreen 0:3b00827bb0b7 786 int i;
AdamGreen 0:3b00827bb0b7 787
AdamGreen 0:3b00827bb0b7 788 /* pick a random challenge length between MIN_CHALLENGE_LENGTH and
AdamGreen 0:3b00827bb0b7 789 MAX_CHALLENGE_LENGTH */
AdamGreen 0:3b00827bb0b7 790 chal_len = (unsigned)
AdamGreen 0:3b00827bb0b7 791 ((((magic() >> 16) *
AdamGreen 0:3b00827bb0b7 792 (MAX_CHALLENGE_LENGTH - MIN_CHALLENGE_LENGTH)) >> 16)
AdamGreen 0:3b00827bb0b7 793 + MIN_CHALLENGE_LENGTH);
AdamGreen 0:3b00827bb0b7 794 LWIP_ASSERT("chal_len <= 0xff", chal_len <= 0xffff);
AdamGreen 0:3b00827bb0b7 795 cstate->chal_len = (u_char)chal_len;
AdamGreen 0:3b00827bb0b7 796 cstate->chal_id = ++cstate->id;
AdamGreen 0:3b00827bb0b7 797 cstate->chal_transmits = 0;
AdamGreen 0:3b00827bb0b7 798
AdamGreen 0:3b00827bb0b7 799 /* generate a random string */
AdamGreen 0:3b00827bb0b7 800 for (i = 0; i < chal_len; i++ ) {
AdamGreen 0:3b00827bb0b7 801 *ptr++ = (char) (magic() & 0xff);
AdamGreen 0:3b00827bb0b7 802 }
AdamGreen 0:3b00827bb0b7 803 }
AdamGreen 0:3b00827bb0b7 804
AdamGreen 0:3b00827bb0b7 805 /*
AdamGreen 0:3b00827bb0b7 806 * ChapSendResponse - send a response packet with values as specified
AdamGreen 0:3b00827bb0b7 807 * in *cstate.
AdamGreen 0:3b00827bb0b7 808 */
AdamGreen 0:3b00827bb0b7 809 /* ARGSUSED */
AdamGreen 0:3b00827bb0b7 810 static void
AdamGreen 0:3b00827bb0b7 811 ChapSendResponse(chap_state *cstate)
AdamGreen 0:3b00827bb0b7 812 {
AdamGreen 0:3b00827bb0b7 813 u_char *outp;
AdamGreen 0:3b00827bb0b7 814 int outlen, md_len, name_len;
AdamGreen 0:3b00827bb0b7 815
AdamGreen 0:3b00827bb0b7 816 md_len = cstate->resp_length;
AdamGreen 0:3b00827bb0b7 817 name_len = (int)strlen(cstate->resp_name);
AdamGreen 0:3b00827bb0b7 818 outlen = CHAP_HEADERLEN + sizeof (u_char) + md_len + name_len;
AdamGreen 0:3b00827bb0b7 819 outp = outpacket_buf[cstate->unit];
AdamGreen 0:3b00827bb0b7 820
AdamGreen 0:3b00827bb0b7 821 MAKEHEADER(outp, PPP_CHAP);
AdamGreen 0:3b00827bb0b7 822
AdamGreen 0:3b00827bb0b7 823 PUTCHAR(CHAP_RESPONSE, outp); /* we are a response */
AdamGreen 0:3b00827bb0b7 824 PUTCHAR(cstate->resp_id, outp); /* copy id from challenge packet */
AdamGreen 0:3b00827bb0b7 825 PUTSHORT(outlen, outp); /* packet length */
AdamGreen 0:3b00827bb0b7 826
AdamGreen 0:3b00827bb0b7 827 PUTCHAR(md_len, outp); /* length of MD */
AdamGreen 0:3b00827bb0b7 828 BCOPY(cstate->response, outp, md_len); /* copy MD to buffer */
AdamGreen 0:3b00827bb0b7 829 INCPTR(md_len, outp);
AdamGreen 0:3b00827bb0b7 830
AdamGreen 0:3b00827bb0b7 831 BCOPY(cstate->resp_name, outp, name_len); /* append our name */
AdamGreen 0:3b00827bb0b7 832
AdamGreen 0:3b00827bb0b7 833 /* send the packet */
AdamGreen 0:3b00827bb0b7 834 pppWrite(cstate->unit, outpacket_buf[cstate->unit], outlen + PPP_HDRLEN);
AdamGreen 0:3b00827bb0b7 835
AdamGreen 0:3b00827bb0b7 836 cstate->clientstate = CHAPCS_RESPONSE;
AdamGreen 0:3b00827bb0b7 837 TIMEOUT(ChapResponseTimeout, cstate, cstate->timeouttime);
AdamGreen 0:3b00827bb0b7 838 ++cstate->resp_transmits;
AdamGreen 0:3b00827bb0b7 839 }
AdamGreen 0:3b00827bb0b7 840
AdamGreen 0:3b00827bb0b7 841 #if PPP_ADDITIONAL_CALLBACKS
AdamGreen 0:3b00827bb0b7 842 static char *ChapCodenames[] = {
AdamGreen 0:3b00827bb0b7 843 "Challenge", "Response", "Success", "Failure"
AdamGreen 0:3b00827bb0b7 844 };
AdamGreen 0:3b00827bb0b7 845 /*
AdamGreen 0:3b00827bb0b7 846 * ChapPrintPkt - print the contents of a CHAP packet.
AdamGreen 0:3b00827bb0b7 847 */
AdamGreen 0:3b00827bb0b7 848 static int
AdamGreen 0:3b00827bb0b7 849 ChapPrintPkt( u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
AdamGreen 0:3b00827bb0b7 850 {
AdamGreen 0:3b00827bb0b7 851 int code, id, len;
AdamGreen 0:3b00827bb0b7 852 int clen, nlen;
AdamGreen 0:3b00827bb0b7 853 u_char x;
AdamGreen 0:3b00827bb0b7 854
AdamGreen 0:3b00827bb0b7 855 if (plen < CHAP_HEADERLEN) {
AdamGreen 0:3b00827bb0b7 856 return 0;
AdamGreen 0:3b00827bb0b7 857 }
AdamGreen 0:3b00827bb0b7 858 GETCHAR(code, p);
AdamGreen 0:3b00827bb0b7 859 GETCHAR(id, p);
AdamGreen 0:3b00827bb0b7 860 GETSHORT(len, p);
AdamGreen 0:3b00827bb0b7 861 if (len < CHAP_HEADERLEN || len > plen) {
AdamGreen 0:3b00827bb0b7 862 return 0;
AdamGreen 0:3b00827bb0b7 863 }
AdamGreen 0:3b00827bb0b7 864
AdamGreen 0:3b00827bb0b7 865 if (code >= 1 && code <= sizeof(ChapCodenames) / sizeof(char *)) {
AdamGreen 0:3b00827bb0b7 866 printer(arg, " %s", ChapCodenames[code-1]);
AdamGreen 0:3b00827bb0b7 867 } else {
AdamGreen 0:3b00827bb0b7 868 printer(arg, " code=0x%x", code);
AdamGreen 0:3b00827bb0b7 869 }
AdamGreen 0:3b00827bb0b7 870 printer(arg, " id=0x%x", id);
AdamGreen 0:3b00827bb0b7 871 len -= CHAP_HEADERLEN;
AdamGreen 0:3b00827bb0b7 872 switch (code) {
AdamGreen 0:3b00827bb0b7 873 case CHAP_CHALLENGE:
AdamGreen 0:3b00827bb0b7 874 case CHAP_RESPONSE:
AdamGreen 0:3b00827bb0b7 875 if (len < 1) {
AdamGreen 0:3b00827bb0b7 876 break;
AdamGreen 0:3b00827bb0b7 877 }
AdamGreen 0:3b00827bb0b7 878 clen = p[0];
AdamGreen 0:3b00827bb0b7 879 if (len < clen + 1) {
AdamGreen 0:3b00827bb0b7 880 break;
AdamGreen 0:3b00827bb0b7 881 }
AdamGreen 0:3b00827bb0b7 882 ++p;
AdamGreen 0:3b00827bb0b7 883 nlen = len - clen - 1;
AdamGreen 0:3b00827bb0b7 884 printer(arg, " <");
AdamGreen 0:3b00827bb0b7 885 for (; clen > 0; --clen) {
AdamGreen 0:3b00827bb0b7 886 GETCHAR(x, p);
AdamGreen 0:3b00827bb0b7 887 printer(arg, "%.2x", x);
AdamGreen 0:3b00827bb0b7 888 }
AdamGreen 0:3b00827bb0b7 889 printer(arg, ">, name = %.*Z", nlen, p);
AdamGreen 0:3b00827bb0b7 890 break;
AdamGreen 0:3b00827bb0b7 891 case CHAP_FAILURE:
AdamGreen 0:3b00827bb0b7 892 case CHAP_SUCCESS:
AdamGreen 0:3b00827bb0b7 893 printer(arg, " %.*Z", len, p);
AdamGreen 0:3b00827bb0b7 894 break;
AdamGreen 0:3b00827bb0b7 895 default:
AdamGreen 0:3b00827bb0b7 896 for (clen = len; clen > 0; --clen) {
AdamGreen 0:3b00827bb0b7 897 GETCHAR(x, p);
AdamGreen 0:3b00827bb0b7 898 printer(arg, " %.2x", x);
AdamGreen 0:3b00827bb0b7 899 }
AdamGreen 0:3b00827bb0b7 900 }
AdamGreen 0:3b00827bb0b7 901
AdamGreen 0:3b00827bb0b7 902 return len + CHAP_HEADERLEN;
AdamGreen 0:3b00827bb0b7 903 }
AdamGreen 0:3b00827bb0b7 904 #endif /* PPP_ADDITIONAL_CALLBACKS */
AdamGreen 0:3b00827bb0b7 905
AdamGreen 0:3b00827bb0b7 906 #endif /* CHAP_SUPPORT */
AdamGreen 0:3b00827bb0b7 907
AdamGreen 0:3b00827bb0b7 908 #endif /* PPP_SUPPORT */