1 /* 2 * Copyright 1999 Internet Business Solutions Ltd., Switzerland 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 * 28 */ 29 30 #include <sys/param.h> 31 32 #include <sys/socket.h> 33 #include <netinet/in_systm.h> 34 #include <netinet/in.h> 35 #include <netinet/ip.h> 36 #include <arpa/inet.h> 37 #include <sys/un.h> 38 #include <net/route.h> 39 40 #ifdef LOCALRAD 41 #include "radlib.h" 42 #include "radlib_vs.h" 43 #else 44 #include <radlib.h> 45 #include <radlib_vs.h> 46 #endif 47 48 #include <errno.h> 49 #ifndef NODES 50 #include <md5.h> 51 #endif 52 #include <stdarg.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <sys/time.h> 57 #include <termios.h> 58 #include <unistd.h> 59 #include <netdb.h> 60 61 #include "layer.h" 62 #include "defs.h" 63 #include "log.h" 64 #include "descriptor.h" 65 #include "prompt.h" 66 #include "timer.h" 67 #include "fsm.h" 68 #include "iplist.h" 69 #include "slcompress.h" 70 #include "throughput.h" 71 #include "lqr.h" 72 #include "hdlc.h" 73 #include "mbuf.h" 74 #include "ncpaddr.h" 75 #include "ip.h" 76 #include "ipcp.h" 77 #include "ipv6cp.h" 78 #include "route.h" 79 #include "command.h" 80 #include "filter.h" 81 #include "lcp.h" 82 #include "ccp.h" 83 #include "link.h" 84 #include "mp.h" 85 #include "radius.h" 86 #include "auth.h" 87 #include "async.h" 88 #include "physical.h" 89 #include "chat.h" 90 #include "cbcp.h" 91 #include "chap.h" 92 #include "datalink.h" 93 #include "ncp.h" 94 #include "bundle.h" 95 #include "proto.h" 96 97 #ifndef NODES 98 struct mschap_response { 99 u_char ident; 100 u_char flags; 101 u_char lm_response[24]; 102 u_char nt_response[24]; 103 }; 104 105 struct mschap2_response { 106 u_char ident; 107 u_char flags; 108 u_char pchallenge[16]; 109 u_char reserved[8]; 110 u_char response[24]; 111 }; 112 113 #define AUTH_LEN 16 114 #define SALT_LEN 2 115 #endif 116 117 static const char * 118 radius_policyname(int policy) 119 { 120 switch(policy) { 121 case MPPE_POLICY_ALLOWED: 122 return "Allowed"; 123 case MPPE_POLICY_REQUIRED: 124 return "Required"; 125 } 126 return NumStr(policy, NULL, 0); 127 } 128 129 static const char * 130 radius_typesname(int types) 131 { 132 switch(types) { 133 case MPPE_TYPE_40BIT: 134 return "40 bit"; 135 case MPPE_TYPE_128BIT: 136 return "128 bit"; 137 case MPPE_TYPE_40BIT|MPPE_TYPE_128BIT: 138 return "40 or 128 bit"; 139 } 140 return NumStr(types, NULL, 0); 141 } 142 143 #ifndef NODES 144 static void 145 demangle(struct radius *r, const void *mangled, size_t mlen, 146 char **buf, size_t *len) 147 { 148 char R[AUTH_LEN]; /* variable names as per rfc2548 */ 149 const char *S; 150 u_char b[16]; 151 const u_char *A, *C; 152 MD5_CTX Context; 153 int Slen, i, Clen, Ppos; 154 u_char *P; 155 156 if (mlen % 16 != SALT_LEN) { 157 log_Printf(LogWARN, "Cannot interpret mangled data of length %ld\n", 158 (u_long)mlen); 159 *buf = NULL; 160 *len = 0; 161 return; 162 } 163 164 /* We need the RADIUS Request-Authenticator */ 165 if (rad_request_authenticator(r->cx.rad, R, sizeof R) != AUTH_LEN) { 166 log_Printf(LogWARN, "Cannot obtain the RADIUS request authenticator\n"); 167 *buf = NULL; 168 *len = 0; 169 return; 170 } 171 172 A = (const u_char *)mangled; /* Salt comes first */ 173 C = (const u_char *)mangled + SALT_LEN; /* Then the ciphertext */ 174 Clen = mlen - SALT_LEN; 175 S = rad_server_secret(r->cx.rad); /* We need the RADIUS secret */ 176 Slen = strlen(S); 177 P = alloca(Clen); /* We derive our plaintext */ 178 179 MD5Init(&Context); 180 MD5Update(&Context, S, Slen); 181 MD5Update(&Context, R, AUTH_LEN); 182 MD5Update(&Context, A, SALT_LEN); 183 MD5Final(b, &Context); 184 Ppos = 0; 185 186 while (Clen) { 187 Clen -= 16; 188 189 for (i = 0; i < 16; i++) 190 P[Ppos++] = C[i] ^ b[i]; 191 192 if (Clen) { 193 MD5Init(&Context); 194 MD5Update(&Context, S, Slen); 195 MD5Update(&Context, C, 16); 196 MD5Final(b, &Context); 197 } 198 199 C += 16; 200 } 201 202 /* 203 * The resulting plain text consists of a one-byte length, the text and 204 * maybe some padding. 205 */ 206 *len = *P; 207 if (*len > mlen - 1) { 208 log_Printf(LogWARN, "Mangled data seems to be garbage\n"); 209 *buf = NULL; 210 *len = 0; 211 return; 212 } 213 214 *buf = malloc(*len); 215 memcpy(*buf, P + 1, *len); 216 } 217 #endif 218 219 /* XXX: This should go into librarius. */ 220 #ifndef NOINET6 221 static uint8_t * 222 rad_cvt_ipv6prefix(const void *data, size_t len) 223 { 224 const size_t ipv6len = sizeof(struct in6_addr) + 2; 225 uint8_t *s; 226 227 if (len > ipv6len) 228 return NULL; 229 s = malloc(ipv6len); 230 if (s != NULL) { 231 memset(s, 0, ipv6len); 232 memcpy(s, data, len); 233 } 234 return s; 235 } 236 #endif 237 238 /* 239 * rad_continue_send_request() has given us `got' (non-zero). Deal with it. 240 */ 241 static void 242 radius_Process(struct radius *r, int got) 243 { 244 char *argv[MAXARGS], *nuke; 245 struct bundle *bundle; 246 int argc, addrs, res, width; 247 size_t len; 248 struct ncprange dest; 249 struct ncpaddr gw; 250 const void *data; 251 const char *stype; 252 u_int32_t ipaddr, vendor; 253 struct in_addr ip; 254 #ifndef NOINET6 255 uint8_t ipv6addr[INET6_ADDRSTRLEN]; 256 struct in6_addr ip6; 257 #endif 258 259 r->cx.fd = -1; /* Stop select()ing */ 260 stype = r->cx.auth ? "auth" : "acct"; 261 262 switch (got) { 263 case RAD_ACCESS_ACCEPT: 264 log_Printf(LogPHASE, "Radius(%s): ACCEPT received\n", stype); 265 if (!r->cx.auth) { 266 rad_close(r->cx.rad); 267 return; 268 } 269 break; 270 271 case RAD_ACCESS_REJECT: 272 log_Printf(LogPHASE, "Radius(%s): REJECT received\n", stype); 273 if (!r->cx.auth) { 274 rad_close(r->cx.rad); 275 return; 276 } 277 break; 278 279 case RAD_ACCESS_CHALLENGE: 280 /* we can't deal with this (for now) ! */ 281 log_Printf(LogPHASE, "Radius: CHALLENGE received (can't handle yet)\n"); 282 if (r->cx.auth) 283 auth_Failure(r->cx.auth); 284 rad_close(r->cx.rad); 285 return; 286 287 case RAD_ACCOUNTING_RESPONSE: 288 log_Printf(LogPHASE, "Radius(%s): Accounting response received\n", stype); 289 if (r->cx.auth) 290 auth_Failure(r->cx.auth); /* unexpected !!! */ 291 292 /* No further processing for accounting requests, please */ 293 rad_close(r->cx.rad); 294 return; 295 296 case -1: 297 log_Printf(LogPHASE, "radius(%s): %s\n", stype, rad_strerror(r->cx.rad)); 298 if (r->cx.auth) 299 auth_Failure(r->cx.auth); 300 rad_close(r->cx.rad); 301 return; 302 303 default: 304 log_Printf(LogERROR, "rad_send_request(%s): Failed %d: %s\n", stype, 305 got, rad_strerror(r->cx.rad)); 306 if (r->cx.auth) 307 auth_Failure(r->cx.auth); 308 rad_close(r->cx.rad); 309 return; 310 } 311 312 /* Let's see what we've got in our reply */ 313 r->ip.s_addr = r->mask.s_addr = INADDR_NONE; 314 r->mtu = 0; 315 r->vj = 0; 316 while ((res = rad_get_attr(r->cx.rad, &data, &len)) > 0) { 317 switch (res) { 318 case RAD_FRAMED_IP_ADDRESS: 319 r->ip = rad_cvt_addr(data); 320 log_Printf(LogPHASE, " IP %s\n", inet_ntoa(r->ip)); 321 break; 322 323 case RAD_FILTER_ID: 324 free(r->filterid); 325 if ((r->filterid = rad_cvt_string(data, len)) == NULL) { 326 log_Printf(LogERROR, "rad_cvt_string: %s\n", rad_strerror(r->cx.rad)); 327 auth_Failure(r->cx.auth); 328 rad_close(r->cx.rad); 329 return; 330 } 331 log_Printf(LogPHASE, " Filter \"%s\"\n", r->filterid); 332 break; 333 334 case RAD_SESSION_TIMEOUT: 335 r->sessiontime = rad_cvt_int(data); 336 log_Printf(LogPHASE, " Session-Timeout %lu\n", r->sessiontime); 337 break; 338 339 case RAD_FRAMED_IP_NETMASK: 340 r->mask = rad_cvt_addr(data); 341 log_Printf(LogPHASE, " Netmask %s\n", inet_ntoa(r->mask)); 342 break; 343 344 case RAD_FRAMED_MTU: 345 r->mtu = rad_cvt_int(data); 346 log_Printf(LogPHASE, " MTU %lu\n", r->mtu); 347 break; 348 349 case RAD_FRAMED_ROUTING: 350 /* Disabled for now - should we automatically set up some filters ? */ 351 /* rad_cvt_int(data); */ 352 /* bit 1 = Send routing packets */ 353 /* bit 2 = Receive routing packets */ 354 break; 355 356 case RAD_FRAMED_COMPRESSION: 357 r->vj = rad_cvt_int(data) == 1 ? 1 : 0; 358 log_Printf(LogPHASE, " VJ %sabled\n", r->vj ? "en" : "dis"); 359 break; 360 361 case RAD_FRAMED_ROUTE: 362 /* 363 * We expect a string of the format ``dest[/bits] gw [metrics]'' 364 * Any specified metrics are ignored. MYADDR and HISADDR are 365 * understood for ``dest'' and ``gw'' and ``0.0.0.0'' is the same 366 * as ``HISADDR''. 367 */ 368 369 if ((nuke = rad_cvt_string(data, len)) == NULL) { 370 log_Printf(LogERROR, "rad_cvt_string: %s\n", rad_strerror(r->cx.rad)); 371 auth_Failure(r->cx.auth); 372 rad_close(r->cx.rad); 373 return; 374 } 375 376 log_Printf(LogPHASE, " Route: %s\n", nuke); 377 bundle = r->cx.auth->physical->dl->bundle; 378 ip.s_addr = INADDR_ANY; 379 ncpaddr_setip4(&gw, ip); 380 ncprange_setip4host(&dest, ip); 381 argc = command_Interpret(nuke, strlen(nuke), argv); 382 if (argc < 0) 383 log_Printf(LogWARN, "radius: %s: Syntax error\n", 384 argc == 1 ? argv[0] : "\"\""); 385 else if (argc < 2) 386 log_Printf(LogWARN, "radius: %s: Invalid route\n", 387 argc == 1 ? argv[0] : "\"\""); 388 else if ((strcasecmp(argv[0], "default") != 0 && 389 !ncprange_aton(&dest, &bundle->ncp, argv[0])) || 390 !ncpaddr_aton(&gw, &bundle->ncp, argv[1])) 391 log_Printf(LogWARN, "radius: %s %s: Invalid route\n", 392 argv[0], argv[1]); 393 else { 394 ncprange_getwidth(&dest, &width); 395 if (width == 32 && strchr(argv[0], '/') == NULL) { 396 /* No mask specified - use the natural mask */ 397 ncprange_getip4addr(&dest, &ip); 398 ncprange_setip4mask(&dest, addr2mask(ip)); 399 } 400 addrs = 0; 401 402 if (!strncasecmp(argv[0], "HISADDR", 7)) 403 addrs = ROUTE_DSTHISADDR; 404 else if (!strncasecmp(argv[0], "MYADDR", 6)) 405 addrs = ROUTE_DSTMYADDR; 406 407 if (ncpaddr_getip4addr(&gw, &ipaddr) && ipaddr == INADDR_ANY) { 408 addrs |= ROUTE_GWHISADDR; 409 ncpaddr_setip4(&gw, bundle->ncp.ipcp.peer_ip); 410 } else if (strcasecmp(argv[1], "HISADDR") == 0) 411 addrs |= ROUTE_GWHISADDR; 412 413 route_Add(&r->routes, addrs, &dest, &gw); 414 } 415 free(nuke); 416 break; 417 418 case RAD_REPLY_MESSAGE: 419 free(r->repstr); 420 if ((r->repstr = rad_cvt_string(data, len)) == NULL) { 421 log_Printf(LogERROR, "rad_cvt_string: %s\n", rad_strerror(r->cx.rad)); 422 auth_Failure(r->cx.auth); 423 rad_close(r->cx.rad); 424 return; 425 } 426 log_Printf(LogPHASE, " Reply-Message \"%s\"\n", r->repstr); 427 break; 428 429 #ifndef NOINET6 430 case RAD_FRAMED_IPV6_PREFIX: 431 free(r->ipv6prefix); 432 r->ipv6prefix = rad_cvt_ipv6prefix(data, len); 433 inet_ntop(AF_INET6, &r->ipv6prefix[2], ipv6addr, sizeof(ipv6addr)); 434 log_Printf(LogPHASE, " IPv6 %s/%d\n", ipv6addr, r->ipv6prefix[1]); 435 break; 436 437 case RAD_FRAMED_IPV6_ROUTE: 438 /* 439 * We expect a string of the format ``dest[/bits] gw [metrics]'' 440 * Any specified metrics are ignored. MYADDR6 and HISADDR6 are 441 * understood for ``dest'' and ``gw'' and ``::'' is the same 442 * as ``HISADDR6''. 443 */ 444 445 if ((nuke = rad_cvt_string(data, len)) == NULL) { 446 log_Printf(LogERROR, "rad_cvt_string: %s\n", rad_strerror(r->cx.rad)); 447 auth_Failure(r->cx.auth); 448 rad_close(r->cx.rad); 449 return; 450 } 451 452 log_Printf(LogPHASE, " IPv6 Route: %s\n", nuke); 453 bundle = r->cx.auth->physical->dl->bundle; 454 ncpaddr_setip6(&gw, &in6addr_any); 455 ncprange_set(&dest, &gw, 0); 456 argc = command_Interpret(nuke, strlen(nuke), argv); 457 if (argc < 0) 458 log_Printf(LogWARN, "radius: %s: Syntax error\n", 459 argc == 1 ? argv[0] : "\"\""); 460 else if (argc < 2) 461 log_Printf(LogWARN, "radius: %s: Invalid route\n", 462 argc == 1 ? argv[0] : "\"\""); 463 else if ((strcasecmp(argv[0], "default") != 0 && 464 !ncprange_aton(&dest, &bundle->ncp, argv[0])) || 465 !ncpaddr_aton(&gw, &bundle->ncp, argv[1])) 466 log_Printf(LogWARN, "radius: %s %s: Invalid route\n", 467 argv[0], argv[1]); 468 else { 469 addrs = 0; 470 471 if (!strncasecmp(argv[0], "HISADDR6", 8)) 472 addrs = ROUTE_DSTHISADDR6; 473 else if (!strncasecmp(argv[0], "MYADDR6", 7)) 474 addrs = ROUTE_DSTMYADDR6; 475 476 if (ncpaddr_getip6(&gw, &ip6) && IN6_IS_ADDR_UNSPECIFIED(&ip6)) { 477 addrs |= ROUTE_GWHISADDR6; 478 ncpaddr_copy(&gw, &bundle->ncp.ipv6cp.hisaddr); 479 } else if (strcasecmp(argv[1], "HISADDR6") == 0) 480 addrs |= ROUTE_GWHISADDR6; 481 482 route_Add(&r->ipv6routes, addrs, &dest, &gw); 483 } 484 free(nuke); 485 break; 486 #endif 487 488 case RAD_VENDOR_SPECIFIC: 489 if ((res = rad_get_vendor_attr(&vendor, &data, &len)) <= 0) { 490 log_Printf(LogERROR, "rad_get_vendor_attr: %s (failing!)\n", 491 rad_strerror(r->cx.rad)); 492 auth_Failure(r->cx.auth); 493 rad_close(r->cx.rad); 494 return; 495 } 496 497 switch (vendor) { 498 case RAD_VENDOR_MICROSOFT: 499 switch (res) { 500 #ifndef NODES 501 case RAD_MICROSOFT_MS_CHAP_ERROR: 502 free(r->errstr); 503 if (len == 0) 504 r->errstr = NULL; 505 else { 506 if (len < 3 || ((const char *)data)[1] != '=') { 507 /* 508 * Only point at the String field if we don't think the 509 * peer has misformatted the response. 510 */ 511 ((const char *)data)++; 512 len--; 513 } else 514 log_Printf(LogWARN, "Warning: The MS-CHAP-Error " 515 "attribute is mis-formatted. Compensating\n"); 516 if ((r->errstr = rad_cvt_string((const char *)data, 517 len)) == NULL) { 518 log_Printf(LogERROR, "rad_cvt_string: %s\n", 519 rad_strerror(r->cx.rad)); 520 auth_Failure(r->cx.auth); 521 rad_close(r->cx.rad); 522 return; 523 } 524 log_Printf(LogPHASE, " MS-CHAP-Error \"%s\"\n", r->errstr); 525 } 526 break; 527 528 case RAD_MICROSOFT_MS_CHAP2_SUCCESS: 529 free(r->msrepstr); 530 if (len == 0) 531 r->msrepstr = NULL; 532 else { 533 if (len < 3 || ((const char *)data)[1] != '=') { 534 /* 535 * Only point at the String field if we don't think the 536 * peer has misformatted the response. 537 */ 538 ((const char *)data)++; 539 len--; 540 } else 541 log_Printf(LogWARN, "Warning: The MS-CHAP2-Success " 542 "attribute is mis-formatted. Compensating\n"); 543 if ((r->msrepstr = rad_cvt_string((const char *)data, 544 len)) == NULL) { 545 log_Printf(LogERROR, "rad_cvt_string: %s\n", 546 rad_strerror(r->cx.rad)); 547 auth_Failure(r->cx.auth); 548 rad_close(r->cx.rad); 549 return; 550 } 551 log_Printf(LogPHASE, " MS-CHAP2-Success \"%s\"\n", 552 r->msrepstr); 553 } 554 break; 555 556 case RAD_MICROSOFT_MS_MPPE_ENCRYPTION_POLICY: 557 r->mppe.policy = rad_cvt_int(data); 558 log_Printf(LogPHASE, " MS-MPPE-Encryption-Policy %s\n", 559 radius_policyname(r->mppe.policy)); 560 break; 561 562 case RAD_MICROSOFT_MS_MPPE_ENCRYPTION_TYPES: 563 r->mppe.types = rad_cvt_int(data); 564 log_Printf(LogPHASE, " MS-MPPE-Encryption-Types %s\n", 565 radius_typesname(r->mppe.types)); 566 break; 567 568 case RAD_MICROSOFT_MS_MPPE_RECV_KEY: 569 free(r->mppe.recvkey); 570 demangle(r, data, len, &r->mppe.recvkey, &r->mppe.recvkeylen); 571 log_Printf(LogPHASE, " MS-MPPE-Recv-Key ********\n"); 572 break; 573 574 case RAD_MICROSOFT_MS_MPPE_SEND_KEY: 575 demangle(r, data, len, &r->mppe.sendkey, &r->mppe.sendkeylen); 576 log_Printf(LogPHASE, " MS-MPPE-Send-Key ********\n"); 577 break; 578 #endif 579 580 default: 581 log_Printf(LogDEBUG, "Dropping MICROSOFT vendor specific " 582 "RADIUS attribute %d\n", res); 583 break; 584 } 585 break; 586 587 default: 588 log_Printf(LogDEBUG, "Dropping vendor %lu RADIUS attribute %d\n", 589 (unsigned long)vendor, res); 590 break; 591 } 592 break; 593 594 default: 595 log_Printf(LogDEBUG, "Dropping RADIUS attribute %d\n", res); 596 break; 597 } 598 } 599 600 if (res == -1) { 601 log_Printf(LogERROR, "rad_get_attr: %s (failing!)\n", 602 rad_strerror(r->cx.rad)); 603 auth_Failure(r->cx.auth); 604 } else if (got == RAD_ACCESS_REJECT) 605 auth_Failure(r->cx.auth); 606 else { 607 r->valid = 1; 608 auth_Success(r->cx.auth); 609 } 610 rad_close(r->cx.rad); 611 } 612 613 /* 614 * We've either timed out or select()ed on the read descriptor 615 */ 616 static void 617 radius_Continue(struct radius *r, int sel) 618 { 619 struct timeval tv; 620 int got; 621 622 timer_Stop(&r->cx.timer); 623 if ((got = rad_continue_send_request(r->cx.rad, sel, &r->cx.fd, &tv)) == 0) { 624 log_Printf(LogPHASE, "Radius: Request re-sent\n"); 625 r->cx.timer.load = tv.tv_usec / TICKUNIT + tv.tv_sec * SECTICKS; 626 timer_Start(&r->cx.timer); 627 return; 628 } 629 630 radius_Process(r, got); 631 } 632 633 /* 634 * Time to call rad_continue_send_request() - timed out. 635 */ 636 static void 637 radius_Timeout(void *v) 638 { 639 radius_Continue((struct radius *)v, 0); 640 } 641 642 /* 643 * Time to call rad_continue_send_request() - something to read. 644 */ 645 static void 646 radius_Read(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset) 647 { 648 radius_Continue(descriptor2radius(d), 1); 649 } 650 651 /* 652 * Behave as a struct fdescriptor (descriptor.h) 653 */ 654 static int 655 radius_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) 656 { 657 struct radius *rad = descriptor2radius(d); 658 659 if (r && rad->cx.fd != -1) { 660 FD_SET(rad->cx.fd, r); 661 if (*n < rad->cx.fd + 1) 662 *n = rad->cx.fd + 1; 663 log_Printf(LogTIMER, "Radius: fdset(r) %d\n", rad->cx.fd); 664 return 1; 665 } 666 667 return 0; 668 } 669 670 /* 671 * Behave as a struct fdescriptor (descriptor.h) 672 */ 673 static int 674 radius_IsSet(struct fdescriptor *d, const fd_set *fdset) 675 { 676 struct radius *r = descriptor2radius(d); 677 678 return r && r->cx.fd != -1 && FD_ISSET(r->cx.fd, fdset); 679 } 680 681 /* 682 * Behave as a struct fdescriptor (descriptor.h) 683 */ 684 static int 685 radius_Write(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset) 686 { 687 /* We never want to write here ! */ 688 log_Printf(LogALERT, "radius_Write: Internal error: Bad call !\n"); 689 return 0; 690 } 691 692 /* 693 * Initialise ourselves 694 */ 695 void 696 radius_Init(struct radius *r) 697 { 698 r->desc.type = RADIUS_DESCRIPTOR; 699 r->desc.UpdateSet = radius_UpdateSet; 700 r->desc.IsSet = radius_IsSet; 701 r->desc.Read = radius_Read; 702 r->desc.Write = radius_Write; 703 r->cx.fd = -1; 704 r->cx.rad = NULL; 705 memset(&r->cx.timer, '\0', sizeof r->cx.timer); 706 r->cx.auth = NULL; 707 r->valid = 0; 708 r->vj = 0; 709 r->ip.s_addr = INADDR_ANY; 710 r->mask.s_addr = INADDR_NONE; 711 r->routes = NULL; 712 r->mtu = DEF_MTU; 713 r->msrepstr = NULL; 714 r->repstr = NULL; 715 #ifndef NOINET6 716 r->ipv6prefix = NULL; 717 r->ipv6routes = NULL; 718 #endif 719 r->errstr = NULL; 720 r->mppe.policy = 0; 721 r->mppe.types = 0; 722 r->mppe.recvkey = NULL; 723 r->mppe.recvkeylen = 0; 724 r->mppe.sendkey = NULL; 725 r->mppe.sendkeylen = 0; 726 *r->cfg.file = '\0';; 727 log_Printf(LogDEBUG, "Radius: radius_Init\n"); 728 } 729 730 /* 731 * Forget everything and go back to initialised state. 732 */ 733 void 734 radius_Destroy(struct radius *r) 735 { 736 r->valid = 0; 737 log_Printf(LogDEBUG, "Radius: radius_Destroy\n"); 738 timer_Stop(&r->cx.timer); 739 route_DeleteAll(&r->routes); 740 #ifndef NOINET6 741 route_DeleteAll(&r->ipv6routes); 742 #endif 743 free(r->filterid); 744 r->filterid = NULL; 745 free(r->msrepstr); 746 r->msrepstr = NULL; 747 free(r->repstr); 748 r->repstr = NULL; 749 #ifndef NOINET6 750 free(r->ipv6prefix); 751 r->ipv6prefix = NULL; 752 #endif 753 free(r->errstr); 754 r->errstr = NULL; 755 free(r->mppe.recvkey); 756 r->mppe.recvkey = NULL; 757 r->mppe.recvkeylen = 0; 758 free(r->mppe.sendkey); 759 r->mppe.sendkey = NULL; 760 r->mppe.sendkeylen = 0; 761 if (r->cx.fd != -1) { 762 r->cx.fd = -1; 763 rad_close(r->cx.rad); 764 } 765 } 766 767 static int 768 radius_put_physical_details(struct rad_handle *rad, struct physical *p) 769 { 770 int slot, type; 771 772 type = RAD_VIRTUAL; 773 if (p->handler) 774 switch (p->handler->type) { 775 case I4B_DEVICE: 776 type = RAD_ISDN_SYNC; 777 break; 778 779 case TTY_DEVICE: 780 type = RAD_ASYNC; 781 break; 782 783 case ETHER_DEVICE: 784 type = RAD_ETHERNET; 785 break; 786 787 case TCP_DEVICE: 788 case UDP_DEVICE: 789 case EXEC_DEVICE: 790 case ATM_DEVICE: 791 case NG_DEVICE: 792 type = RAD_VIRTUAL; 793 break; 794 } 795 796 if (rad_put_int(rad, RAD_NAS_PORT_TYPE, type) != 0) { 797 log_Printf(LogERROR, "rad_put: rad_put_int: %s\n", rad_strerror(rad)); 798 rad_close(rad); 799 return 0; 800 } 801 802 if ((slot = physical_Slot(p)) >= 0) 803 if (rad_put_int(rad, RAD_NAS_PORT, slot) != 0) { 804 log_Printf(LogERROR, "rad_put: rad_put_int: %s\n", rad_strerror(rad)); 805 rad_close(rad); 806 return 0; 807 } 808 809 return 1; 810 } 811 812 /* 813 * Start an authentication request to the RADIUS server. 814 */ 815 int 816 radius_Authenticate(struct radius *r, struct authinfo *authp, const char *name, 817 const char *key, int klen, const char *nchallenge, 818 int nclen) 819 { 820 struct timeval tv; 821 int got; 822 char hostname[MAXHOSTNAMELEN]; 823 #if 0 824 struct hostent *hp; 825 struct in_addr hostaddr; 826 #endif 827 #ifndef NODES 828 struct mschap_response msresp; 829 struct mschap2_response msresp2; 830 const struct MSCHAPv2_resp *keyv2; 831 #endif 832 833 if (!*r->cfg.file) 834 return 0; 835 836 if (r->cx.fd != -1) 837 /* 838 * We assume that our name/key/challenge is the same as last time, 839 * and just continue to wait for the RADIUS server(s). 840 */ 841 return 1; 842 843 radius_Destroy(r); 844 845 if ((r->cx.rad = rad_auth_open()) == NULL) { 846 log_Printf(LogERROR, "rad_auth_open: %s\n", strerror(errno)); 847 return 0; 848 } 849 850 if (rad_config(r->cx.rad, r->cfg.file) != 0) { 851 log_Printf(LogERROR, "rad_config: %s\n", rad_strerror(r->cx.rad)); 852 rad_close(r->cx.rad); 853 return 0; 854 } 855 856 if (rad_create_request(r->cx.rad, RAD_ACCESS_REQUEST) != 0) { 857 log_Printf(LogERROR, "rad_create_request: %s\n", rad_strerror(r->cx.rad)); 858 rad_close(r->cx.rad); 859 return 0; 860 } 861 862 if (rad_put_string(r->cx.rad, RAD_USER_NAME, name) != 0 || 863 rad_put_int(r->cx.rad, RAD_SERVICE_TYPE, RAD_FRAMED) != 0 || 864 rad_put_int(r->cx.rad, RAD_FRAMED_PROTOCOL, RAD_PPP) != 0) { 865 log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad)); 866 rad_close(r->cx.rad); 867 return 0; 868 } 869 870 switch (authp->physical->link.lcp.want_auth) { 871 case PROTO_PAP: 872 /* We're talking PAP */ 873 if (rad_put_attr(r->cx.rad, RAD_USER_PASSWORD, key, klen) != 0) { 874 log_Printf(LogERROR, "PAP: rad_put_string: %s\n", 875 rad_strerror(r->cx.rad)); 876 rad_close(r->cx.rad); 877 return 0; 878 } 879 break; 880 881 case PROTO_CHAP: 882 switch (authp->physical->link.lcp.want_authtype) { 883 case 0x5: 884 if (rad_put_attr(r->cx.rad, RAD_CHAP_PASSWORD, key, klen) != 0 || 885 rad_put_attr(r->cx.rad, RAD_CHAP_CHALLENGE, nchallenge, nclen) != 0) { 886 log_Printf(LogERROR, "CHAP: rad_put_string: %s\n", 887 rad_strerror(r->cx.rad)); 888 rad_close(r->cx.rad); 889 return 0; 890 } 891 break; 892 893 #ifndef NODES 894 case 0x80: 895 if (klen != 50) { 896 log_Printf(LogERROR, "CHAP80: Unrecognised key length %d\n", klen); 897 rad_close(r->cx.rad); 898 return 0; 899 } 900 901 rad_put_vendor_attr(r->cx.rad, RAD_VENDOR_MICROSOFT, 902 RAD_MICROSOFT_MS_CHAP_CHALLENGE, nchallenge, nclen); 903 msresp.ident = *key; 904 msresp.flags = 0x01; 905 memcpy(msresp.lm_response, key + 1, 24); 906 memcpy(msresp.nt_response, key + 25, 24); 907 rad_put_vendor_attr(r->cx.rad, RAD_VENDOR_MICROSOFT, 908 RAD_MICROSOFT_MS_CHAP_RESPONSE, &msresp, 909 sizeof msresp); 910 break; 911 912 case 0x81: 913 if (klen != sizeof(*keyv2) + 1) { 914 log_Printf(LogERROR, "CHAP81: Unrecognised key length %d\n", klen); 915 rad_close(r->cx.rad); 916 return 0; 917 } 918 919 keyv2 = (const struct MSCHAPv2_resp *)(key + 1); 920 rad_put_vendor_attr(r->cx.rad, RAD_VENDOR_MICROSOFT, 921 RAD_MICROSOFT_MS_CHAP_CHALLENGE, nchallenge, nclen); 922 msresp2.ident = *key; 923 msresp2.flags = keyv2->Flags; 924 memcpy(msresp2.response, keyv2->NTResponse, sizeof msresp2.response); 925 memset(msresp2.reserved, '\0', sizeof msresp2.reserved); 926 memcpy(msresp2.pchallenge, keyv2->PeerChallenge, 927 sizeof msresp2.pchallenge); 928 rad_put_vendor_attr(r->cx.rad, RAD_VENDOR_MICROSOFT, 929 RAD_MICROSOFT_MS_CHAP2_RESPONSE, &msresp2, 930 sizeof msresp2); 931 break; 932 #endif 933 default: 934 log_Printf(LogERROR, "CHAP: Unrecognised type 0x%02x\n", 935 authp->physical->link.lcp.want_authtype); 936 rad_close(r->cx.rad); 937 return 0; 938 } 939 } 940 941 if (gethostname(hostname, sizeof hostname) != 0) 942 log_Printf(LogERROR, "rad_put: gethostname(): %s\n", strerror(errno)); 943 else { 944 #if 0 945 if ((hp = gethostbyname(hostname)) != NULL) { 946 hostaddr.s_addr = *(u_long *)hp->h_addr; 947 if (rad_put_addr(r->cx.rad, RAD_NAS_IP_ADDRESS, hostaddr) != 0) { 948 log_Printf(LogERROR, "rad_put: rad_put_string: %s\n", 949 rad_strerror(r->cx.rad)); 950 rad_close(r->cx.rad); 951 return 0; 952 } 953 } 954 #endif 955 if (rad_put_string(r->cx.rad, RAD_NAS_IDENTIFIER, hostname) != 0) { 956 log_Printf(LogERROR, "rad_put: rad_put_string: %s\n", 957 rad_strerror(r->cx.rad)); 958 rad_close(r->cx.rad); 959 return 0; 960 } 961 } 962 963 radius_put_physical_details(r->cx.rad, authp->physical); 964 965 r->cx.auth = authp; 966 if ((got = rad_init_send_request(r->cx.rad, &r->cx.fd, &tv))) 967 radius_Process(r, got); 968 else { 969 log_Printf(LogPHASE, "Radius: Request sent\n"); 970 log_Printf(LogDEBUG, "Using radius_Timeout [%p]\n", radius_Timeout); 971 r->cx.timer.load = tv.tv_usec / TICKUNIT + tv.tv_sec * SECTICKS; 972 r->cx.timer.func = radius_Timeout; 973 r->cx.timer.name = "radius auth"; 974 r->cx.timer.arg = r; 975 timer_Start(&r->cx.timer); 976 } 977 978 return 1; 979 } 980 981 /* Fetch IP, netmask from IPCP */ 982 void 983 radius_Account_Set_Ip(struct radacct *ac, struct in_addr *peer_ip, 984 struct in_addr *netmask) 985 { 986 ac->proto = PROTO_IPCP; 987 memcpy(&ac->peer.ip.addr, peer_ip, sizeof(ac->peer.ip.addr)); 988 memcpy(&ac->peer.ip.mask, netmask, sizeof(ac->peer.ip.mask)); 989 } 990 991 #ifndef NOINET6 992 /* Fetch interface-id from IPV6CP */ 993 void 994 radius_Account_Set_Ipv6(struct radacct *ac, u_char *ifid) 995 { 996 ac->proto = PROTO_IPV6CP; 997 memcpy(&ac->peer.ipv6.ifid, ifid, sizeof(ac->peer.ipv6.ifid)); 998 } 999 #endif 1000 1001 /* 1002 * Send an accounting request to the RADIUS server 1003 */ 1004 void 1005 radius_Account(struct radius *r, struct radacct *ac, struct datalink *dl, 1006 int acct_type, struct pppThroughput *stats) 1007 { 1008 struct timeval tv; 1009 int got; 1010 char hostname[MAXHOSTNAMELEN]; 1011 #if 0 1012 struct hostent *hp; 1013 struct in_addr hostaddr; 1014 #endif 1015 1016 if (!*r->cfg.file) 1017 return; 1018 1019 if (r->cx.fd != -1) 1020 /* 1021 * We assume that our name/key/challenge is the same as last time, 1022 * and just continue to wait for the RADIUS server(s). 1023 */ 1024 return; 1025 1026 timer_Stop(&r->cx.timer); 1027 1028 if ((r->cx.rad = rad_acct_open()) == NULL) { 1029 log_Printf(LogERROR, "rad_auth_open: %s\n", strerror(errno)); 1030 return; 1031 } 1032 1033 if (rad_config(r->cx.rad, r->cfg.file) != 0) { 1034 log_Printf(LogERROR, "rad_config: %s\n", rad_strerror(r->cx.rad)); 1035 rad_close(r->cx.rad); 1036 return; 1037 } 1038 1039 if (rad_create_request(r->cx.rad, RAD_ACCOUNTING_REQUEST) != 0) { 1040 log_Printf(LogERROR, "rad_create_request: %s\n", rad_strerror(r->cx.rad)); 1041 rad_close(r->cx.rad); 1042 return; 1043 } 1044 1045 /* Grab some accounting data and initialize structure */ 1046 if (acct_type == RAD_START) { 1047 ac->rad_parent = r; 1048 /* Fetch username from datalink */ 1049 strncpy(ac->user_name, dl->peer.authname, sizeof ac->user_name); 1050 ac->user_name[AUTHLEN-1] = '\0'; 1051 1052 ac->authentic = 2; /* Assume RADIUS verified auth data */ 1053 1054 /* Generate a session ID */ 1055 snprintf(ac->session_id, sizeof ac->session_id, "%s%ld-%s%lu", 1056 dl->bundle->cfg.auth.name, (long)getpid(), 1057 dl->peer.authname, (unsigned long)stats->uptime); 1058 1059 /* And grab our MP socket name */ 1060 snprintf(ac->multi_session_id, sizeof ac->multi_session_id, "%s", 1061 dl->bundle->ncp.mp.active ? 1062 dl->bundle->ncp.mp.server.socket.sun_path : ""); 1063 }; 1064 1065 if (rad_put_string(r->cx.rad, RAD_USER_NAME, ac->user_name) != 0 || 1066 rad_put_int(r->cx.rad, RAD_SERVICE_TYPE, RAD_FRAMED) != 0 || 1067 rad_put_int(r->cx.rad, RAD_FRAMED_PROTOCOL, RAD_PPP) != 0) { 1068 log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad)); 1069 rad_close(r->cx.rad); 1070 return; 1071 } 1072 switch (ac->proto) { 1073 case PROTO_IPCP: 1074 if (rad_put_addr(r->cx.rad, RAD_FRAMED_IP_ADDRESS, 1075 ac->peer.ip.addr) != 0 || \ 1076 rad_put_addr(r->cx.rad, RAD_FRAMED_IP_NETMASK, 1077 ac->peer.ip.mask) != 0) { 1078 log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad)); 1079 rad_close(r->cx.rad); 1080 return; 1081 } 1082 break; 1083 #ifndef NOINET6 1084 case PROTO_IPV6CP: 1085 if (rad_put_attr(r->cx.rad, RAD_FRAMED_INTERFACE_ID, ac->peer.ipv6.ifid, 1086 sizeof(ac->peer.ipv6.ifid)) != 0) { 1087 log_Printf(LogERROR, "rad_put_attr: %s\n", rad_strerror(r->cx.rad)); 1088 rad_close(r->cx.rad); 1089 return; 1090 } 1091 if (r->ipv6prefix) { 1092 /* 1093 * Since PPP doesn't delegate an IPv6 prefix to a peer, 1094 * Framed-IPv6-Prefix may be not used, actually. 1095 */ 1096 if (rad_put_attr(r->cx.rad, RAD_FRAMED_IPV6_PREFIX, r->ipv6prefix, 1097 sizeof(struct in6_addr) + 2) != 0) { 1098 log_Printf(LogERROR, "rad_put_attr: %s\n", rad_strerror(r->cx.rad)); 1099 rad_close(r->cx.rad); 1100 return; 1101 } 1102 } 1103 break; 1104 #endif 1105 default: 1106 /* We don't log any protocol specific information */ 1107 break; 1108 } 1109 1110 if (gethostname(hostname, sizeof hostname) != 0) 1111 log_Printf(LogERROR, "rad_put: gethostname(): %s\n", strerror(errno)); 1112 else { 1113 #if 0 1114 if ((hp = gethostbyname(hostname)) != NULL) { 1115 hostaddr.s_addr = *(u_long *)hp->h_addr; 1116 if (rad_put_addr(r->cx.rad, RAD_NAS_IP_ADDRESS, hostaddr) != 0) { 1117 log_Printf(LogERROR, "rad_put: rad_put_string: %s\n", 1118 rad_strerror(r->cx.rad)); 1119 rad_close(r->cx.rad); 1120 return; 1121 } 1122 } 1123 #endif 1124 if (rad_put_string(r->cx.rad, RAD_NAS_IDENTIFIER, hostname) != 0) { 1125 log_Printf(LogERROR, "rad_put: rad_put_string: %s\n", 1126 rad_strerror(r->cx.rad)); 1127 rad_close(r->cx.rad); 1128 return; 1129 } 1130 } 1131 1132 radius_put_physical_details(r->cx.rad, dl->physical); 1133 1134 if (rad_put_int(r->cx.rad, RAD_ACCT_STATUS_TYPE, acct_type) != 0 || 1135 rad_put_string(r->cx.rad, RAD_ACCT_SESSION_ID, ac->session_id) != 0 || 1136 rad_put_string(r->cx.rad, RAD_ACCT_MULTI_SESSION_ID, 1137 ac->multi_session_id) != 0 || 1138 rad_put_int(r->cx.rad, RAD_ACCT_DELAY_TIME, 0) != 0) { 1139 /* XXX ACCT_DELAY_TIME should be increased each time a packet is waiting */ 1140 log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad)); 1141 rad_close(r->cx.rad); 1142 return; 1143 } 1144 1145 if (acct_type == RAD_STOP) 1146 /* Show some statistics */ 1147 if (rad_put_int(r->cx.rad, RAD_ACCT_INPUT_OCTETS, stats->OctetsIn) != 0 || 1148 rad_put_int(r->cx.rad, RAD_ACCT_INPUT_PACKETS, stats->PacketsIn) != 0 || 1149 rad_put_int(r->cx.rad, RAD_ACCT_OUTPUT_OCTETS, stats->OctetsOut) != 0 || 1150 rad_put_int(r->cx.rad, RAD_ACCT_OUTPUT_PACKETS, stats->PacketsOut) 1151 != 0 || 1152 rad_put_int(r->cx.rad, RAD_ACCT_SESSION_TIME, throughput_uptime(stats)) 1153 != 0) { 1154 log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad)); 1155 rad_close(r->cx.rad); 1156 return; 1157 } 1158 1159 r->cx.auth = NULL; /* Not valid for accounting requests */ 1160 if ((got = rad_init_send_request(r->cx.rad, &r->cx.fd, &tv))) 1161 radius_Process(r, got); 1162 else { 1163 log_Printf(LogDEBUG, "Using radius_Timeout [%p]\n", radius_Timeout); 1164 r->cx.timer.load = tv.tv_usec / TICKUNIT + tv.tv_sec * SECTICKS; 1165 r->cx.timer.func = radius_Timeout; 1166 r->cx.timer.name = "radius acct"; 1167 r->cx.timer.arg = r; 1168 timer_Start(&r->cx.timer); 1169 } 1170 } 1171 1172 /* 1173 * How do things look at the moment ? 1174 */ 1175 void 1176 radius_Show(struct radius *r, struct prompt *p) 1177 { 1178 prompt_Printf(p, " Radius config: %s", 1179 *r->cfg.file ? r->cfg.file : "none"); 1180 if (r->valid) { 1181 prompt_Printf(p, "\n IP: %s\n", inet_ntoa(r->ip)); 1182 prompt_Printf(p, " Netmask: %s\n", inet_ntoa(r->mask)); 1183 prompt_Printf(p, " MTU: %lu\n", r->mtu); 1184 prompt_Printf(p, " VJ: %sabled\n", r->vj ? "en" : "dis"); 1185 prompt_Printf(p, " Message: %s\n", r->repstr ? r->repstr : ""); 1186 prompt_Printf(p, " MPPE Enc Policy: %s\n", 1187 radius_policyname(r->mppe.policy)); 1188 prompt_Printf(p, " MPPE Enc Types: %s\n", 1189 radius_typesname(r->mppe.types)); 1190 prompt_Printf(p, " MPPE Recv Key: %seceived\n", 1191 r->mppe.recvkey ? "R" : "Not r"); 1192 prompt_Printf(p, " MPPE Send Key: %seceived\n", 1193 r->mppe.sendkey ? "R" : "Not r"); 1194 prompt_Printf(p, " MS-CHAP2-Response: %s\n", 1195 r->msrepstr ? r->msrepstr : ""); 1196 prompt_Printf(p, " Error Message: %s\n", r->errstr ? r->errstr : ""); 1197 if (r->routes) 1198 route_ShowSticky(p, r->routes, " Routes", 16); 1199 #ifndef NOINET6 1200 if (r->ipv6routes) 1201 route_ShowSticky(p, r->ipv6routes, " IPv6 Routes", 16); 1202 #endif 1203 } else 1204 prompt_Printf(p, " (not authenticated)\n"); 1205 } 1206