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Merge changes from CUPS trunk, r6758.
[thirdparty/cups.git] / scheduler / auth.c
1 /*
2 * "$Id: auth.c 6758 2007-08-02 00:13:44Z mike $"
3 *
4 * Authorization routines for the Common UNIX Printing System (CUPS).
5 *
6 * Copyright 2007 by Apple Inc.
7 * Copyright 1997-2007 by Easy Software Products, all rights reserved.
8 *
9 * This file contains Kerberos support code, copyright 2006 by
10 * Jelmer Vernooij.
11 *
12 * These coded instructions, statements, and computer programs are the
13 * property of Apple Inc. and are protected by Federal copyright
14 * law. Distribution and use rights are outlined in the file "LICENSE.txt"
15 * which should have been included with this file. If this file is
16 * file is missing or damaged, see the license at "http://www.cups.org/".
17 *
18 * Contents:
19 *
20 * cupsdAddLocation() - Add a location for authorization.
21 * cupsdAddName() - Add a name to a location...
22 * cupsdAllowHost() - Add a host name that is allowed to access the
23 * location.
24 * cupsdAllowIP() - Add an IP address or network that is allowed
25 * to access the location.
26 * cupsdAuthorize() - Validate any authorization credentials.
27 * cupsdCheckAuth() - Check authorization masks.
28 * cupsdCheckGroup() - Check for a user's group membership.
29 * cupsdCopyLocation() - Make a copy of a location...
30 * cupsdDeleteAllLocations() - Free all memory used for location
31 * authorization.
32 * cupsdDeleteLocation() - Free all memory used by a location.
33 * cupsdDenyHost() - Add a host name that is not allowed to access
34 * the location.
35 * cupsdDenyIP() - Add an IP address or network that is not
36 * allowed to access the location.
37 * cupsdFindBest() - Find the location entry that best matches the
38 * resource.
39 * cupsdFindLocation() - Find the named location.
40 * cupsdIsAuthorized() - Check to see if the user is authorized...
41 * add_allow() - Add an allow mask to the location.
42 * add_deny() - Add a deny mask to the location.
43 * compare_locations() - Compare two locations.
44 * cups_crypt() - Encrypt the password using the DES or MD5
45 * algorithms, as needed.
46 * get_gss_creds() - Obtain GSS credentials.
47 * get_md5_password() - Get an MD5 password.
48 * pam_func() - PAM conversation function.
49 * to64() - Base64-encode an integer value...
50 * check_authref() - Check an authorization services reference.
51 */
52
53 /*
54 * Include necessary headers...
55 */
56
57 #include "cupsd.h"
58 #include <grp.h>
59 #ifdef HAVE_SHADOW_H
60 # include <shadow.h>
61 #endif /* HAVE_SHADOW_H */
62 #ifdef HAVE_CRYPT_H
63 # include <crypt.h>
64 #endif /* HAVE_CRYPT_H */
65 #if HAVE_LIBPAM
66 # ifdef HAVE_PAM_PAM_APPL_H
67 # include <pam/pam_appl.h>
68 # else
69 # include <security/pam_appl.h>
70 # endif /* HAVE_PAM_PAM_APPL_H */
71 #endif /* HAVE_LIBPAM */
72 #ifdef HAVE_USERSEC_H
73 # include <usersec.h>
74 #endif /* HAVE_USERSEC_H */
75 #ifdef HAVE_MEMBERSHIP_H
76 # include <membership.h>
77 #endif /* HAVE_MEMBERSHIP_H */
78 #ifdef HAVE_AUTHORIZATION_H
79 # include <Security/AuthorizationTags.h>
80 # ifdef HAVE_SECBASEPRIV_H
81 # include <Security/SecBasePriv.h>
82 # else
83 extern const char *cssmErrorString(int error);
84 # endif /* HAVE_SECBASEPRIV_H */
85 #endif /* HAVE_AUTHORIZATION_H */
86 #ifdef HAVE_SYS_UCRED_H
87 # include <sys/ucred.h>
88 typedef struct xucred cupsd_ucred_t;
89 # define CUPSD_UCRED_UID(c) (c).cr_uid
90 #else
91 typedef struct ucred cupsd_ucred_t;
92 # define CUPSD_UCRED_UID(c) (c).uid
93 #endif /* HAVE_SYS_UCRED_H */
94
95
96 /*
97 * Local functions...
98 */
99
100 static cupsd_authmask_t *add_allow(cupsd_location_t *loc);
101 static cupsd_authmask_t *add_deny(cupsd_location_t *loc);
102 #ifdef HAVE_AUTHORIZATION_H
103 static int check_authref(cupsd_client_t *con, const char *right);
104 #endif /* HAVE_AUTHORIZATION_H */
105 static int compare_locations(cupsd_location_t *a,
106 cupsd_location_t *b);
107 #if !HAVE_LIBPAM && !defined(HAVE_USERSEC_H)
108 static char *cups_crypt(const char *pw, const char *salt);
109 #endif /* !HAVE_LIBPAM && !HAVE_USERSEC_H */
110 #ifdef HAVE_GSSAPI
111 static gss_cred_id_t get_gss_creds(const char *service_name);
112 #endif /* HAVE_GSSAPI */
113 static char *get_md5_password(const char *username,
114 const char *group, char passwd[33]);
115 #if HAVE_LIBPAM
116 static int pam_func(int, const struct pam_message **,
117 struct pam_response **, void *);
118 #elif !defined(HAVE_USERSEC_H)
119 static void to64(char *s, unsigned long v, int n);
120 #endif /* HAVE_LIBPAM */
121
122
123 /*
124 * Local structures...
125 */
126
127 #if HAVE_LIBPAM
128 typedef struct cupsd_authdata_s /**** Authentication data ****/
129 {
130 char username[33], /* Username string */
131 password[33]; /* Password string */
132 } cupsd_authdata_t;
133 #endif /* HAVE_LIBPAM */
134
135
136 /*
137 * Local globals...
138 */
139
140 #if defined(__hpux) && HAVE_LIBPAM
141 static cupsd_authdata_t *auth_data; /* Current client being authenticated */
142 #endif /* __hpux && HAVE_LIBPAM */
143
144
145 /*
146 * 'cupsdAddLocation()' - Add a location for authorization.
147 */
148
149 cupsd_location_t * /* O - Pointer to new location record */
150 cupsdAddLocation(const char *location) /* I - Location path */
151 {
152 cupsd_location_t *temp; /* New location */
153
154
155 /*
156 * Make sure the locations array is created...
157 */
158
159 if (!Locations)
160 Locations = cupsArrayNew((cups_array_func_t)compare_locations, NULL);
161
162 if (!Locations)
163 return (NULL);
164
165 /*
166 * Try to allocate memory for the new location.
167 */
168
169 if ((temp = calloc(1, sizeof(cupsd_location_t))) == NULL)
170 return (NULL);
171
172 /*
173 * Initialize the record and copy the name over...
174 */
175
176 temp->location = strdup(location);
177 temp->length = strlen(temp->location);
178
179 cupsArrayAdd(Locations, temp);
180
181 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdAddLocation: added location \'%s\'",
182 location);
183
184 /*
185 * Return the new record...
186 */
187
188 return (temp);
189 }
190
191
192 /*
193 * 'cupsdAddName()' - Add a name to a location...
194 */
195
196 void
197 cupsdAddName(cupsd_location_t *loc, /* I - Location to add to */
198 char *name) /* I - Name to add */
199 {
200 char **temp; /* Pointer to names array */
201
202
203 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdAddName(loc=%p, name=\"%s\")",
204 loc, name);
205
206 if (loc->num_names == 0)
207 temp = malloc(sizeof(char *));
208 else
209 temp = realloc(loc->names, (loc->num_names + 1) * sizeof(char *));
210
211 if (temp == NULL)
212 {
213 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to add name to location %s: %s",
214 loc->location ? loc->location : "nil", strerror(errno));
215 return;
216 }
217
218 loc->names = temp;
219
220 if ((temp[loc->num_names] = strdup(name)) == NULL)
221 {
222 cupsdLogMessage(CUPSD_LOG_ERROR,
223 "Unable to duplicate name for location %s: %s",
224 loc->location ? loc->location : "nil", strerror(errno));
225 return;
226 }
227
228 loc->num_names ++;
229 }
230
231
232 /*
233 * 'cupsdAllowHost()' - Add a host name that is allowed to access the location.
234 */
235
236 void
237 cupsdAllowHost(cupsd_location_t *loc, /* I - Location to add to */
238 char *name) /* I - Name of host or domain to add */
239 {
240 cupsd_authmask_t *temp; /* New host/domain mask */
241 char ifname[32], /* Interface name */
242 *ifptr; /* Pointer to end of name */
243
244
245 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdAllowHost(loc=%p(%s), name=\"%s\")",
246 loc, loc->location ? loc->location : "nil", name);
247
248 if ((temp = add_allow(loc)) == NULL)
249 return;
250
251 if (!strcasecmp(name, "@LOCAL"))
252 {
253 /*
254 * Allow *interface*...
255 */
256
257 temp->type = AUTH_INTERFACE;
258 temp->mask.name.name = strdup("*");
259 temp->mask.name.length = 1;
260 }
261 else if (!strncasecmp(name, "@IF(", 4))
262 {
263 /*
264 * Allow *interface*...
265 */
266
267 strlcpy(ifname, name + 4, sizeof(ifname));
268
269 ifptr = ifname + strlen(ifname);
270
271 if (ifptr[-1] == ')')
272 {
273 ifptr --;
274 *ifptr = '\0';
275 }
276
277 temp->type = AUTH_INTERFACE;
278 temp->mask.name.name = strdup(ifname);
279 temp->mask.name.length = ifptr - ifname;
280 }
281 else
282 {
283 /*
284 * Allow name...
285 */
286
287 temp->type = AUTH_NAME;
288 temp->mask.name.name = strdup(name);
289 temp->mask.name.length = strlen(name);
290 }
291 }
292
293
294 /*
295 * 'cupsdAllowIP()' - Add an IP address or network that is allowed to access
296 * the location.
297 */
298
299 void
300 cupsdAllowIP(cupsd_location_t *loc, /* I - Location to add to */
301 unsigned address[4], /* I - IP address to add */
302 unsigned netmask[4]) /* I - Netmask of address */
303 {
304 cupsd_authmask_t *temp; /* New host/domain mask */
305
306
307 cupsdLogMessage(CUPSD_LOG_DEBUG2,
308 "cupsdAllowIP(loc=%p(%s), address=%x:%x:%x:%x, netmask=%x:%x:%x:%x)",
309 loc, loc->location ? loc->location : "nil",
310 address[0], address[1], address[2], address[3],
311 netmask[0], netmask[1], netmask[2], netmask[3]);
312
313 if ((temp = add_allow(loc)) == NULL)
314 return;
315
316 temp->type = AUTH_IP;
317 memcpy(temp->mask.ip.address, address, sizeof(temp->mask.ip.address));
318 memcpy(temp->mask.ip.netmask, netmask, sizeof(temp->mask.ip.netmask));
319 }
320
321
322 /*
323 * 'cupsdAuthorize()' - Validate any authorization credentials.
324 */
325
326 void
327 cupsdAuthorize(cupsd_client_t *con) /* I - Client connection */
328 {
329 int type; /* Authentication type */
330 const char *authorization; /* Pointer into Authorization string */
331 char *ptr, /* Pointer into string */
332 username[65], /* Username string */
333 password[33]; /* Password string */
334 const char *localuser; /* Certificate username */
335 char nonce[HTTP_MAX_VALUE], /* Nonce value from client */
336 md5[33], /* MD5 password */
337 basicmd5[33]; /* MD5 of Basic password */
338 static const char * const states[] = /* HTTP client states... */
339 {
340 "WAITING",
341 "OPTIONS",
342 "GET",
343 "GET",
344 "HEAD",
345 "POST",
346 "POST",
347 "POST",
348 "PUT",
349 "PUT",
350 "DELETE",
351 "TRACE",
352 "CLOSE",
353 "STATUS"
354 };
355
356
357 /*
358 * Locate the best matching location so we know what kind of
359 * authentication to expect...
360 */
361
362 con->best = cupsdFindBest(con->uri, con->http.state);
363
364 cupsdLogMessage(CUPSD_LOG_DEBUG2,
365 "cupsdAuthorize: con->uri=\"%s\", con->best=%p(%s)",
366 con->uri, con->best, con->best ? con->best->location : "");
367
368 if (con->best && con->best->type != AUTH_NONE)
369 type = con->best->type;
370 else
371 type = DefaultAuthType;
372
373 /*
374 * Decode the Authorization string...
375 */
376
377 authorization = httpGetField(&con->http, HTTP_FIELD_AUTHORIZATION);
378
379 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdAuthorize: Authorization=\"%s\"",
380 authorization);
381
382 username[0] = '\0';
383 password[0] = '\0';
384
385 #ifdef HAVE_AUTHORIZATION_H
386 if (con->authref)
387 {
388 AuthorizationFree(con->authref, kAuthorizationFlagDefaults);
389 con->authref = NULL;
390 }
391 #endif /* HAVE_AUTHORIZATION_H */
392
393 if (type == AUTH_NONE)
394 {
395 /*
396 * No authorization required, return early...
397 */
398
399 cupsdLogMessage(CUPSD_LOG_DEBUG,
400 "cupsdAuthorize: No authentication required.");
401 return;
402 }
403 else if (!*authorization)
404 {
405 /*
406 * No authorization data provided, return early...
407 */
408
409 cupsdLogMessage(CUPSD_LOG_DEBUG,
410 "cupsdAuthorize: No authentication data provided.");
411 return;
412 }
413 #ifdef HAVE_AUTHORIZATION_H
414 else if (!strncmp(authorization, "AuthRef", 6) &&
415 !strcasecmp(con->http.hostname, "localhost"))
416 {
417 OSStatus status; /* Status */
418 int authlen; /* Auth string length */
419 AuthorizationItemSet *authinfo; /* Authorization item set */
420
421 /*
422 * Get the Authorization Services data...
423 */
424
425 authorization += 7;
426 while (isspace(*authorization & 255))
427 authorization ++;
428
429 authlen = sizeof(nonce);
430 httpDecode64_2(nonce, &authlen, authorization);
431
432 if (authlen != kAuthorizationExternalFormLength)
433 {
434 cupsdLogMessage(CUPSD_LOG_ERROR,
435 "External Authorization reference size is incorrect!");
436 return;
437 }
438
439 if ((status = AuthorizationCreateFromExternalForm(
440 (AuthorizationExternalForm *)nonce, &con->authref)) != 0)
441 {
442 cupsdLogMessage(CUPSD_LOG_ERROR,
443 "AuthorizationCreateFromExternalForm returned %d (%s)",
444 (int)status, cssmErrorString(status));
445 return;
446 }
447
448 if ((status = AuthorizationCopyInfo(con->authref,
449 kAuthorizationEnvironmentUsername,
450 &authinfo)) != 0)
451 {
452 cupsdLogMessage(CUPSD_LOG_ERROR,
453 "AuthorizationCopyInfo returned %d (%s)",
454 (int)status, cssmErrorString(status));
455 return;
456 }
457
458 if (authinfo->count == 1)
459 strlcpy(username, authinfo->items[0].value, sizeof(username));
460
461 cupsdLogMessage(CUPSD_LOG_DEBUG,
462 "cupsdAuthorize: Authorized as %s using AuthRef",
463 username);
464
465 AuthorizationFreeItemSet(authinfo);
466 }
467 #endif /* HAVE_AUTHORIZATION_H */
468 #if defined(SO_PEERCRED) && defined(AF_LOCAL)
469 else if (!strncmp(authorization, "PeerCred ", 9) &&
470 con->http.hostaddr->addr.sa_family == AF_LOCAL)
471 {
472 /*
473 * Use peer credentials from domain socket connection...
474 */
475
476 struct passwd *pwd; /* Password entry for this user */
477 cupsd_ucred_t peercred; /* Peer credentials */
478 socklen_t peersize; /* Size of peer credentials */
479
480
481 if ((pwd = getpwnam(authorization + 9)) == NULL)
482 {
483 cupsdLogMessage(CUPSD_LOG_ERROR, "User \"%s\" does not exist!",
484 authorization + 9);
485 return;
486 }
487
488 peersize = sizeof(peercred);
489
490 if (getsockopt(con->http.fd, SOL_SOCKET, SO_PEERCRED, &peercred, &peersize))
491 {
492 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to get peer credentials - %s",
493 strerror(errno));
494 return;
495 }
496
497 if (pwd->pw_uid != CUPSD_UCRED_UID(peercred))
498 {
499 cupsdLogMessage(CUPSD_LOG_ERROR,
500 "Invalid peer credentials for \"%s\" - got %d, "
501 "expected %d!", authorization + 9,
502 CUPSD_UCRED_UID(peercred), pwd->pw_uid);
503 # ifdef HAVE_SYS_UCRED_H
504 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAuthorize: cr_version=%d",
505 peercred.cr_version);
506 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAuthorize: cr_uid=%d",
507 peercred.cr_uid);
508 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAuthorize: cr_ngroups=%d",
509 peercred.cr_ngroups);
510 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAuthorize: cr_groups[0]=%d",
511 peercred.cr_groups[0]);
512 # endif /* HAVE_SYS_UCRED_H */
513 return;
514 }
515
516 strlcpy(username, authorization + 9, sizeof(username));
517
518 cupsdLogMessage(CUPSD_LOG_DEBUG,
519 "cupsdAuthorize: Authorized as %s using PeerCred",
520 username);
521 }
522 #endif /* SO_PEERCRED && AF_LOCAL */
523 else if (!strncmp(authorization, "Local", 5) &&
524 !strcasecmp(con->http.hostname, "localhost"))
525 {
526 /*
527 * Get Local certificate authentication data...
528 */
529
530 authorization += 5;
531 while (isspace(*authorization & 255))
532 authorization ++;
533
534 if ((localuser = cupsdFindCert(authorization)) != NULL)
535 {
536 strlcpy(username, localuser, sizeof(username));
537
538 cupsdLogMessage(CUPSD_LOG_DEBUG,
539 "cupsdAuthorize: Authorized as %s using Local",
540 username);
541 }
542 else
543 {
544 cupsdLogMessage(CUPSD_LOG_ERROR,
545 "cupsdAuthorize: Local authentication certificate not "
546 "found!");
547 return;
548 }
549 }
550 else if (!strncmp(authorization, "Basic", 5) &&
551 (type == AUTH_BASIC || type == AUTH_BASICDIGEST))
552 {
553 /*
554 * Get the Basic authentication data...
555 */
556
557 int userlen; /* Username:password length */
558
559
560 authorization += 5;
561 while (isspace(*authorization & 255))
562 authorization ++;
563
564 userlen = sizeof(username);
565 httpDecode64_2(username, &userlen, authorization);
566
567 /*
568 * Pull the username and password out...
569 */
570
571 if ((ptr = strchr(username, ':')) == NULL)
572 {
573 cupsdLogMessage(CUPSD_LOG_ERROR,
574 "cupsdAuthorize: Missing Basic password!");
575 return;
576 }
577
578 *ptr++ = '\0';
579
580 if (!username[0])
581 {
582 /*
583 * Username must not be empty...
584 */
585
586 cupsdLogMessage(CUPSD_LOG_ERROR,
587 "cupsdAuthorize: Empty Basic username!");
588 return;
589 }
590
591 if (!*ptr)
592 {
593 /*
594 * Password must not be empty...
595 */
596
597 cupsdLogMessage(CUPSD_LOG_ERROR,
598 "cupsdAuthorize: Empty Basic password!");
599 return;
600 }
601
602 strlcpy(password, ptr, sizeof(password));
603
604 /*
605 * Validate the username and password...
606 */
607
608 switch (type)
609 {
610 case AUTH_BASIC :
611 {
612 #if HAVE_LIBPAM
613 /*
614 * Only use PAM to do authentication. This supports MD5
615 * passwords, among other things...
616 */
617
618 pam_handle_t *pamh; /* PAM authentication handle */
619 int pamerr; /* PAM error code */
620 struct pam_conv pamdata;/* PAM conversation data */
621 cupsd_authdata_t data; /* Authentication data */
622
623
624 strlcpy(data.username, username, sizeof(data.username));
625 strlcpy(data.password, password, sizeof(data.password));
626
627 # if defined(__sun) || defined(__hpux)
628 pamdata.conv = (int (*)(int, struct pam_message **,
629 struct pam_response **,
630 void *))pam_func;
631 # else
632 pamdata.conv = pam_func;
633 # endif /* __sun || __hpux */
634 pamdata.appdata_ptr = &data;
635
636 # ifdef __hpux
637 /*
638 * Workaround for HP-UX bug in pam_unix; see pam_func() below for
639 * more info...
640 */
641
642 auth_data = &data;
643 # endif /* __hpux */
644
645 pamerr = pam_start("cups", username, &pamdata, &pamh);
646 if (pamerr != PAM_SUCCESS)
647 {
648 cupsdLogMessage(CUPSD_LOG_ERROR,
649 "cupsdAuthorize: pam_start() returned %d (%s)!\n",
650 pamerr, pam_strerror(pamh, pamerr));
651 pam_end(pamh, 0);
652 return;
653 }
654
655 pamerr = pam_authenticate(pamh, PAM_SILENT);
656 if (pamerr != PAM_SUCCESS)
657 {
658 cupsdLogMessage(CUPSD_LOG_ERROR,
659 "cupsdAuthorize: pam_authenticate() returned %d "
660 "(%s)!\n",
661 pamerr, pam_strerror(pamh, pamerr));
662 pam_end(pamh, 0);
663 return;
664 }
665
666 pamerr = pam_acct_mgmt(pamh, PAM_SILENT);
667 if (pamerr != PAM_SUCCESS)
668 {
669 cupsdLogMessage(CUPSD_LOG_ERROR,
670 "cupsdAuthorize: pam_acct_mgmt() returned %d "
671 "(%s)!\n",
672 pamerr, pam_strerror(pamh, pamerr));
673 pam_end(pamh, 0);
674 return;
675 }
676
677 pam_end(pamh, PAM_SUCCESS);
678
679 #elif defined(HAVE_USERSEC_H)
680 /*
681 * Use AIX authentication interface...
682 */
683
684 char *authmsg; /* Authentication message */
685 int reenter; /* ??? */
686
687
688 cupsdLogMessage(CUPSD_LOG_DEBUG,
689 "cupsdAuthorize: AIX authenticate of username \"%s\"",
690 username);
691
692 reenter = 1;
693 if (authenticate(username, password, &reenter, &authmsg) != 0)
694 {
695 cupsdLogMessage(CUPSD_LOG_DEBUG,
696 "cupsdAuthorize: Unable to authenticate username "
697 "\"%s\": %s",
698 username, strerror(errno));
699 return;
700 }
701
702 #else
703 /*
704 * Use normal UNIX password file-based authentication...
705 */
706
707 char *pass; /* Encrypted password */
708 struct passwd *pw; /* User password data */
709 # ifdef HAVE_SHADOW_H
710 struct spwd *spw; /* Shadow password data */
711 # endif /* HAVE_SHADOW_H */
712
713
714 pw = getpwnam(username); /* Get the current password */
715 endpwent(); /* Close the password file */
716
717 if (!pw)
718 {
719 /*
720 * No such user...
721 */
722
723 cupsdLogMessage(CUPSD_LOG_ERROR,
724 "cupsdAuthorize: Unknown username \"%s\"!",
725 username);
726 return;
727 }
728
729 # ifdef HAVE_SHADOW_H
730 spw = getspnam(username);
731 endspent();
732
733 if (!spw && !strcmp(pw->pw_passwd, "x"))
734 {
735 /*
736 * Don't allow blank passwords!
737 */
738
739 cupsdLogMessage(CUPSD_LOG_ERROR,
740 "cupsdAuthorize: Username \"%s\" has no shadow "
741 "password!", username);
742 return;
743 }
744
745 if (spw && !spw->sp_pwdp[0] && !pw->pw_passwd[0])
746 # else
747 if (!pw->pw_passwd[0])
748 # endif /* HAVE_SHADOW_H */
749 {
750 /*
751 * Don't allow blank passwords!
752 */
753
754 cupsdLogMessage(CUPSD_LOG_ERROR,
755 "cupsdAuthorize: Username \"%s\" has no password!",
756 username);
757 return;
758 }
759
760 /*
761 * OK, the password isn't blank, so compare with what came from the
762 * client...
763 */
764
765 pass = cups_crypt(password, pw->pw_passwd);
766
767 cupsdLogMessage(CUPSD_LOG_DEBUG2,
768 "cupsdAuthorize: pw_passwd=\"%s\", crypt=\"%s\"",
769 pw->pw_passwd, pass);
770
771 if (!pass || strcmp(pw->pw_passwd, pass))
772 {
773 # ifdef HAVE_SHADOW_H
774 if (spw)
775 {
776 pass = cups_crypt(password, spw->sp_pwdp);
777
778 cupsdLogMessage(CUPSD_LOG_DEBUG2,
779 "cupsdAuthorize: sp_pwdp=\"%s\", crypt=\"%s\"",
780 spw->sp_pwdp, pass);
781
782 if (pass == NULL || strcmp(spw->sp_pwdp, pass))
783 {
784 cupsdLogMessage(CUPSD_LOG_ERROR,
785 "cupsdAuthorize: Authentication failed for "
786 "user \"%s\"!",
787 username);
788 return;
789 }
790 }
791 else
792 # endif /* HAVE_SHADOW_H */
793 {
794 cupsdLogMessage(CUPSD_LOG_ERROR,
795 "cupsdAuthorize: Authentication failed for "
796 "user \"%s\"!",
797 username);
798 return;
799 }
800 }
801 #endif /* HAVE_LIBPAM */
802 }
803
804 cupsdLogMessage(CUPSD_LOG_DEBUG,
805 "cupsdAuthorize: Authorized as %s using Basic",
806 username);
807 break;
808
809 case AUTH_BASICDIGEST :
810 /*
811 * Do Basic authentication with the Digest password file...
812 */
813
814 if (!get_md5_password(username, NULL, md5))
815 {
816 cupsdLogMessage(CUPSD_LOG_ERROR,
817 "cupsdAuthorize: Unknown MD5 username \"%s\"!",
818 username);
819 return;
820 }
821
822 httpMD5(username, "CUPS", password, basicmd5);
823
824 if (strcmp(md5, basicmd5))
825 {
826 cupsdLogMessage(CUPSD_LOG_ERROR,
827 "cupsdAuthorize: Authentication failed for \"%s\"!",
828 username);
829 return;
830 }
831
832 cupsdLogMessage(CUPSD_LOG_DEBUG,
833 "cupsdAuthorize: Authorized as %s using BasicDigest",
834 username);
835 break;
836 }
837 }
838 else if (!strncmp(authorization, "Digest", 6) && type == AUTH_DIGEST)
839 {
840 /*
841 * Get the username, password, and nonce from the Digest attributes...
842 */
843
844 if (!httpGetSubField2(&(con->http), HTTP_FIELD_AUTHORIZATION, "username",
845 username, sizeof(username)) || !username[0])
846 {
847 /*
848 * Username must not be empty...
849 */
850
851 cupsdLogMessage(CUPSD_LOG_ERROR,
852 "cupsdAuthorize: Empty or missing Digest username!");
853 return;
854 }
855
856 if (!httpGetSubField2(&(con->http), HTTP_FIELD_AUTHORIZATION, "response",
857 password, sizeof(password)) || !password[0])
858 {
859 /*
860 * Password must not be empty...
861 */
862
863 cupsdLogMessage(CUPSD_LOG_ERROR,
864 "cupsdAuthorize: Empty or missing Digest password!");
865 return;
866 }
867
868 if (!httpGetSubField(&(con->http), HTTP_FIELD_AUTHORIZATION, "nonce",
869 nonce))
870 {
871 cupsdLogMessage(CUPSD_LOG_ERROR,
872 "cupsdAuthorize: No nonce value for Digest "
873 "authentication!");
874 return;
875 }
876
877 if (strcmp(con->http.hostname, nonce))
878 {
879 cupsdLogMessage(CUPSD_LOG_ERROR,
880 "cupsdAuthorize: Bad nonce value, expected \"%s\", "
881 "got \"%s\"!", con->http.hostname, nonce);
882 return;
883 }
884
885 /*
886 * Validate the username and password...
887 */
888
889 if (!get_md5_password(username, NULL, md5))
890 {
891 cupsdLogMessage(CUPSD_LOG_ERROR,
892 "cupsdAuthorize: Unknown MD5 username \"%s\"!",
893 username);
894 return;
895 }
896
897 httpMD5Final(nonce, states[con->http.state], con->uri, md5);
898
899 if (strcmp(md5, password))
900 {
901 cupsdLogMessage(CUPSD_LOG_ERROR,
902 "cupsdAuthorize: Authentication failed for \"%s\"!",
903 username);
904 return;
905 }
906
907 cupsdLogMessage(CUPSD_LOG_DEBUG,
908 "cupsdAuthorize: Authorized as %s using Digest",
909 username);
910 }
911 #ifdef HAVE_GSSAPI
912 else if (!strncmp(authorization, "Negotiate", 9) && type == AUTH_NEGOTIATE)
913 {
914 int len; /* Length of authorization string */
915 gss_cred_id_t server_creds; /* Server credentials */
916 gss_ctx_id_t context; /* Authorization context */
917 OM_uint32 major_status, /* Major status code */
918 minor_status; /* Minor status code */
919 gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER,
920 /* Input token from string */
921 output_token = GSS_C_EMPTY_BUFFER;
922 /* Output token for username */
923 gss_name_t client_name; /* Client name */
924 unsigned int ret_flags; /* Credential flags */
925
926
927 # ifdef __APPLE__
928 /*
929 * If the weak-linked GSSAPI/Kerberos library is not present, don't try
930 * to use it...
931 */
932
933 if (gss_init_sec_context == NULL)
934 {
935 cupsdLogMessage(CUPSD_LOG_WARN,
936 "GSSAPI/Kerberos authentication failed because the "
937 "Kerberos framework is not present.");
938 return;
939 }
940 # endif /* __APPLE__ */
941
942 con->gss_output_token.length = 0;
943
944 /*
945 * Find the start of the Kerberos input token...
946 */
947
948 authorization += 9;
949 while (isspace(*authorization & 255))
950 authorization ++;
951
952 if (!*authorization)
953 {
954 cupsdLogMessage(CUPSD_LOG_DEBUG2,
955 "cupsdAuthorize: No authentication data specified.");
956 return;
957 }
958
959 /*
960 * Get the server credentials...
961 */
962
963 if ((server_creds = get_gss_creds(GSSServiceName)) == NULL)
964 return;
965
966 /*
967 * Decode the authorization string to get the input token...
968 */
969
970 len = strlen(authorization);
971 input_token.value = malloc(len);
972 input_token.value = httpDecode64_2(input_token.value, &len,
973 authorization);
974 input_token.length = len;
975
976 /*
977 * Accept the input token to get the authorization info...
978 */
979
980 context = GSS_C_NO_CONTEXT;
981 client_name = GSS_C_NO_NAME;
982 major_status = gss_accept_sec_context(&minor_status,
983 &context,
984 server_creds,
985 &input_token,
986 GSS_C_NO_CHANNEL_BINDINGS,
987 &client_name,
988 NULL,
989 &con->gss_output_token,
990 &ret_flags,
991 NULL,
992 &con->gss_delegated_cred);
993
994 if (GSS_ERROR(major_status))
995 {
996 cupsdLogGSSMessage(CUPSD_LOG_DEBUG, major_status, minor_status,
997 "cupsdAuthorize: Error accepting GSSAPI security "
998 "context");
999
1000 if (context != GSS_C_NO_CONTEXT)
1001 gss_delete_sec_context(&minor_status, &context, GSS_C_NO_BUFFER);
1002 return;
1003 }
1004
1005 /*
1006 * Get the username associated with the credentials...
1007 */
1008
1009 if (!con->gss_delegated_cred)
1010 cupsdLogMessage(CUPSD_LOG_DEBUG,
1011 "cupsdAuthorize: No delegated credentials!");
1012
1013 if (major_status == GSS_S_CONTINUE_NEEDED)
1014 cupsdLogGSSMessage(CUPSD_LOG_DEBUG, major_status, minor_status,
1015 "cupsdAuthorize: Credentials not complete");
1016 else if (major_status == GSS_S_COMPLETE)
1017 {
1018 major_status = gss_display_name(&minor_status, client_name,
1019 &output_token, NULL);
1020
1021 if (GSS_ERROR(major_status))
1022 {
1023 cupsdLogGSSMessage(CUPSD_LOG_DEBUG, major_status, minor_status,
1024 "cupsdAuthorize: Error getting username");
1025 gss_release_name(&minor_status, &client_name);
1026 gss_delete_sec_context(&minor_status, &context, GSS_C_NO_BUFFER);
1027 return;
1028 }
1029
1030 gss_release_name(&minor_status, &client_name);
1031 strlcpy(username, output_token.value, sizeof(username));
1032 if ((ptr = strchr(username, '@')) != NULL)
1033 *ptr = '\0'; /* Strip @KDC from the username */
1034
1035 cupsdLogMessage(CUPSD_LOG_DEBUG,
1036 "cupsdAuthorize: Authorized as %s using Negotiate",
1037 username);
1038
1039 gss_release_buffer(&minor_status, &output_token);
1040 gss_delete_sec_context(&minor_status, &context, GSS_C_NO_BUFFER);
1041
1042 con->gss_have_creds = 1;
1043 }
1044 else
1045 gss_release_name(&minor_status, &client_name);
1046 }
1047 #endif /* HAVE_GSSAPI */
1048 else if (type != AUTH_NONE)
1049 {
1050 char scheme[256]; /* Auth scheme... */
1051 static const char * const types[] = /* Auth types */
1052 {
1053 "None",
1054 "Basic",
1055 "Digest",
1056 "BasicDigest",
1057 "Negotiate"
1058 };
1059
1060
1061 if (sscanf(authorization, "%255s", scheme) != 1)
1062 strcpy(scheme, "UNKNOWN");
1063
1064 cupsdLogMessage(CUPSD_LOG_ERROR,
1065 "Bad authentication data \"%s ...\", expected \"%s ...\"",
1066 scheme, types[type]);
1067 return;
1068 }
1069
1070 /*
1071 * If we get here, then we were able to validate the username and
1072 * password - copy the validated username and password to the client
1073 * data and return...
1074 */
1075
1076 strlcpy(con->username, username, sizeof(con->username));
1077 strlcpy(con->password, password, sizeof(con->password));
1078 }
1079
1080
1081 /*
1082 * 'cupsdCheckAuth()' - Check authorization masks.
1083 */
1084
1085 int /* O - 1 if mask matches, 0 otherwise */
1086 cupsdCheckAuth(
1087 unsigned ip[4], /* I - Client address */
1088 char *name, /* I - Client hostname */
1089 int name_len, /* I - Length of hostname */
1090 int num_masks, /* I - Number of masks */
1091 cupsd_authmask_t *masks) /* I - Masks */
1092 {
1093 int i; /* Looping var */
1094 cupsd_netif_t *iface; /* Network interface */
1095 unsigned netip4; /* IPv4 network address */
1096 #ifdef AF_INET6
1097 unsigned netip6[4]; /* IPv6 network address */
1098 #endif /* AF_INET6 */
1099
1100 while (num_masks > 0)
1101 {
1102 switch (masks->type)
1103 {
1104 case AUTH_INTERFACE :
1105 /*
1106 * Check for a match with a network interface...
1107 */
1108
1109 netip4 = htonl(ip[3]);
1110
1111 #ifdef AF_INET6
1112 netip6[0] = htonl(ip[0]);
1113 netip6[1] = htonl(ip[1]);
1114 netip6[2] = htonl(ip[2]);
1115 netip6[3] = htonl(ip[3]);
1116 #endif /* AF_INET6 */
1117
1118 if (!strcmp(masks->mask.name.name, "*"))
1119 {
1120 /*
1121 * Check against all local interfaces...
1122 */
1123
1124 cupsdNetIFUpdate();
1125
1126 for (iface = (cupsd_netif_t *)cupsArrayFirst(NetIFList);
1127 iface;
1128 iface = (cupsd_netif_t *)cupsArrayNext(NetIFList))
1129 {
1130 /*
1131 * Only check local interfaces...
1132 */
1133
1134 if (!iface->is_local)
1135 continue;
1136
1137 if (iface->address.addr.sa_family == AF_INET)
1138 {
1139 /*
1140 * Check IPv4 address...
1141 */
1142
1143 if ((netip4 & iface->mask.ipv4.sin_addr.s_addr) ==
1144 (iface->address.ipv4.sin_addr.s_addr &
1145 iface->mask.ipv4.sin_addr.s_addr))
1146 return (1);
1147 }
1148 #ifdef AF_INET6
1149 else
1150 {
1151 /*
1152 * Check IPv6 address...
1153 */
1154
1155 for (i = 0; i < 4; i ++)
1156 if ((netip6[i] & iface->mask.ipv6.sin6_addr.s6_addr32[i]) !=
1157 (iface->address.ipv6.sin6_addr.s6_addr32[i] &
1158 iface->mask.ipv6.sin6_addr.s6_addr32[i]))
1159 break;
1160
1161 if (i == 4)
1162 return (1);
1163 }
1164 #endif /* AF_INET6 */
1165 }
1166 }
1167 else
1168 {
1169 /*
1170 * Check the named interface...
1171 */
1172
1173 for (iface = (cupsd_netif_t *)cupsArrayFirst(NetIFList);
1174 iface;
1175 iface = (cupsd_netif_t *)cupsArrayNext(NetIFList))
1176 {
1177 if (strcmp(masks->mask.name.name, iface->name))
1178 continue;
1179
1180 if (iface->address.addr.sa_family == AF_INET)
1181 {
1182 /*
1183 * Check IPv4 address...
1184 */
1185
1186 if ((netip4 & iface->mask.ipv4.sin_addr.s_addr) ==
1187 (iface->address.ipv4.sin_addr.s_addr &
1188 iface->mask.ipv4.sin_addr.s_addr))
1189 return (1);
1190 }
1191 #ifdef AF_INET6
1192 else
1193 {
1194 /*
1195 * Check IPv6 address...
1196 */
1197
1198 for (i = 0; i < 4; i ++)
1199 if ((netip6[i] & iface->mask.ipv6.sin6_addr.s6_addr32[i]) !=
1200 (iface->address.ipv6.sin6_addr.s6_addr32[i] &
1201 iface->mask.ipv6.sin6_addr.s6_addr32[i]))
1202 break;
1203
1204 if (i == 4)
1205 return (1);
1206 }
1207 #endif /* AF_INET6 */
1208 }
1209 }
1210 break;
1211
1212 case AUTH_NAME :
1213 /*
1214 * Check for exact name match...
1215 */
1216
1217 if (!strcasecmp(name, masks->mask.name.name))
1218 return (1);
1219
1220 /*
1221 * Check for domain match...
1222 */
1223
1224 if (name_len >= masks->mask.name.length &&
1225 masks->mask.name.name[0] == '.' &&
1226 !strcasecmp(name + name_len - masks->mask.name.length,
1227 masks->mask.name.name))
1228 return (1);
1229 break;
1230
1231 case AUTH_IP :
1232 /*
1233 * Check for IP/network address match...
1234 */
1235
1236 for (i = 0; i < 4; i ++)
1237 if ((ip[i] & masks->mask.ip.netmask[i]) !=
1238 masks->mask.ip.address[i])
1239 break;
1240
1241 if (i == 4)
1242 return (1);
1243 break;
1244 }
1245
1246 masks ++;
1247 num_masks --;
1248 }
1249
1250 return (0);
1251 }
1252
1253
1254 /*
1255 * 'cupsdCheckGroup()' - Check for a user's group membership.
1256 */
1257
1258 int /* O - 1 if user is a member, 0 otherwise */
1259 cupsdCheckGroup(
1260 const char *username, /* I - User name */
1261 struct passwd *user, /* I - System user info */
1262 const char *groupname) /* I - Group name */
1263 {
1264 int i; /* Looping var */
1265 struct group *group; /* System group info */
1266 char junk[33]; /* MD5 password (not used) */
1267 #ifdef HAVE_MBR_UID_TO_UUID
1268 uuid_t useruuid, /* UUID for username */
1269 groupuuid; /* UUID for groupname */
1270 int is_member; /* True if user is a member of group */
1271 #endif /* HAVE_MBR_UID_TO_UUID */
1272
1273
1274 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1275 "cupsdCheckGroup(username=\"%s\", user=%p, groupname=\"%s\")",
1276 username, user, groupname);
1277
1278 /*
1279 * Validate input...
1280 */
1281
1282 if (!username || !groupname)
1283 return (0);
1284
1285 /*
1286 * Check to see if the user is a member of the named group...
1287 */
1288
1289 group = getgrnam(groupname);
1290 endgrent();
1291
1292 if (group != NULL)
1293 {
1294 /*
1295 * Group exists, check it...
1296 */
1297
1298 for (i = 0; group->gr_mem[i]; i ++)
1299 if (!strcasecmp(username, group->gr_mem[i]))
1300 return (1);
1301 }
1302
1303 /*
1304 * Group doesn't exist or user not in group list, check the group ID
1305 * against the user's group ID...
1306 */
1307
1308 if (user && group && group->gr_gid == user->pw_gid)
1309 return (1);
1310
1311 #ifdef HAVE_MBR_UID_TO_UUID
1312 /*
1313 * Check group membership through MacOS X membership API...
1314 */
1315
1316 if (user && group)
1317 if (!mbr_uid_to_uuid(user->pw_uid, useruuid))
1318 if (!mbr_gid_to_uuid(group->gr_gid, groupuuid))
1319 if (!mbr_check_membership(useruuid, groupuuid, &is_member))
1320 if (is_member)
1321 return (1);
1322 #endif /* HAVE_MBR_UID_TO_UUID */
1323
1324 /*
1325 * Username not found, group not found, or user is not part of the
1326 * system group... Check for a user and group in the MD5 password
1327 * file...
1328 */
1329
1330 if (get_md5_password(username, groupname, junk) != NULL)
1331 return (1);
1332
1333 /*
1334 * If we get this far, then the user isn't part of the named group...
1335 */
1336
1337 return (0);
1338 }
1339
1340
1341 /*
1342 * 'cupsdCopyLocation()' - Make a copy of a location...
1343 */
1344
1345 cupsd_location_t * /* O - New location */
1346 cupsdCopyLocation(
1347 cupsd_location_t **loc) /* IO - Original location */
1348 {
1349 int i; /* Looping var */
1350 cupsd_location_t *temp; /* New location */
1351 char location[HTTP_MAX_URI];
1352 /* Location of resource */
1353
1354
1355 /*
1356 * Use a local copy of location because cupsdAddLocation may cause
1357 * this memory to be moved...
1358 */
1359
1360 strlcpy(location, (*loc)->location, sizeof(location));
1361
1362 if ((temp = cupsdAddLocation(location)) == NULL)
1363 return (NULL);
1364
1365 /*
1366 * Copy the information from the original location to the new one.
1367 */
1368
1369 temp->limit = (*loc)->limit;
1370 temp->order_type = (*loc)->order_type;
1371 temp->type = (*loc)->type;
1372 temp->level = (*loc)->level;
1373 temp->satisfy = (*loc)->satisfy;
1374 temp->encryption = (*loc)->encryption;
1375
1376 if ((temp->num_names = (*loc)->num_names) > 0)
1377 {
1378 /*
1379 * Copy the names array...
1380 */
1381
1382 if ((temp->names = calloc(temp->num_names, sizeof(char *))) == NULL)
1383 {
1384 cupsdLogMessage(CUPSD_LOG_ERROR,
1385 "cupsdCopyLocation: Unable to allocate memory for %d names: %s",
1386 temp->num_names, strerror(errno));
1387
1388 cupsdDeleteLocation(temp);
1389 return (NULL);
1390 }
1391
1392 for (i = 0; i < temp->num_names; i ++)
1393 if ((temp->names[i] = strdup((*loc)->names[i])) == NULL)
1394 {
1395 cupsdLogMessage(CUPSD_LOG_ERROR,
1396 "cupsdCopyLocation: Unable to copy name \"%s\": %s",
1397 (*loc)->names[i], strerror(errno));
1398
1399 cupsdDeleteLocation(temp);
1400 return (NULL);
1401 }
1402 }
1403
1404 if ((temp->num_allow = (*loc)->num_allow) > 0)
1405 {
1406 /*
1407 * Copy allow rules...
1408 */
1409
1410 if ((temp->allow = calloc(temp->num_allow, sizeof(cupsd_authmask_t))) == NULL)
1411 {
1412 cupsdLogMessage(CUPSD_LOG_ERROR,
1413 "cupsdCopyLocation: Unable to allocate memory for %d allow rules: %s",
1414 temp->num_allow, strerror(errno));
1415 cupsdDeleteLocation(temp);
1416 return (NULL);
1417 }
1418
1419 for (i = 0; i < temp->num_allow; i ++)
1420 switch (temp->allow[i].type = (*loc)->allow[i].type)
1421 {
1422 case AUTH_NAME :
1423 temp->allow[i].mask.name.length = (*loc)->allow[i].mask.name.length;
1424 temp->allow[i].mask.name.name = strdup((*loc)->allow[i].mask.name.name);
1425
1426 if (temp->allow[i].mask.name.name == NULL)
1427 {
1428 cupsdLogMessage(CUPSD_LOG_ERROR,
1429 "cupsdCopyLocation: Unable to copy allow name \"%s\": %s",
1430 (*loc)->allow[i].mask.name.name, strerror(errno));
1431 cupsdDeleteLocation(temp);
1432 return (NULL);
1433 }
1434 break;
1435 case AUTH_IP :
1436 memcpy(&(temp->allow[i].mask.ip), &((*loc)->allow[i].mask.ip),
1437 sizeof(cupsd_ipmask_t));
1438 break;
1439 }
1440 }
1441
1442 if ((temp->num_deny = (*loc)->num_deny) > 0)
1443 {
1444 /*
1445 * Copy deny rules...
1446 */
1447
1448 if ((temp->deny = calloc(temp->num_deny, sizeof(cupsd_authmask_t))) == NULL)
1449 {
1450 cupsdLogMessage(CUPSD_LOG_ERROR,
1451 "cupsdCopyLocation: Unable to allocate memory for %d deny rules: %s",
1452 temp->num_deny, strerror(errno));
1453 cupsdDeleteLocation(temp);
1454 return (NULL);
1455 }
1456
1457 for (i = 0; i < temp->num_deny; i ++)
1458 switch (temp->deny[i].type = (*loc)->deny[i].type)
1459 {
1460 case AUTH_NAME :
1461 temp->deny[i].mask.name.length = (*loc)->deny[i].mask.name.length;
1462 temp->deny[i].mask.name.name = strdup((*loc)->deny[i].mask.name.name);
1463
1464 if (temp->deny[i].mask.name.name == NULL)
1465 {
1466 cupsdLogMessage(CUPSD_LOG_ERROR,
1467 "cupsdCopyLocation: Unable to copy deny name \"%s\": %s",
1468 (*loc)->deny[i].mask.name.name, strerror(errno));
1469 cupsdDeleteLocation(temp);
1470 return (NULL);
1471 }
1472 break;
1473 case AUTH_IP :
1474 memcpy(&(temp->deny[i].mask.ip), &((*loc)->deny[i].mask.ip),
1475 sizeof(cupsd_ipmask_t));
1476 break;
1477 }
1478 }
1479
1480 return (temp);
1481 }
1482
1483
1484 /*
1485 * 'cupsdDeleteAllLocations()' - Free all memory used for location authorization.
1486 */
1487
1488 void
1489 cupsdDeleteAllLocations(void)
1490 {
1491 cupsd_location_t *loc; /* Current location */
1492
1493
1494 /*
1495 * Free all of the allow/deny records first...
1496 */
1497
1498 for (loc = (cupsd_location_t *)cupsArrayFirst(Locations);
1499 loc;
1500 loc = (cupsd_location_t *)cupsArrayNext(Locations))
1501 cupsdDeleteLocation(loc);
1502
1503 /*
1504 * Then free the location array...
1505 */
1506
1507 cupsArrayDelete(Locations);
1508 Locations = NULL;
1509 }
1510
1511
1512 /*
1513 * 'cupsdDeleteLocation()' - Free all memory used by a location.
1514 */
1515
1516 void
1517 cupsdDeleteLocation(
1518 cupsd_location_t *loc) /* I - Location to delete */
1519 {
1520 int i; /* Looping var */
1521 cupsd_authmask_t *mask; /* Current mask */
1522
1523
1524 cupsArrayRemove(Locations, loc);
1525
1526 for (i = loc->num_names - 1; i >= 0; i --)
1527 free(loc->names[i]);
1528
1529 if (loc->num_names > 0)
1530 free(loc->names);
1531
1532 for (i = loc->num_allow, mask = loc->allow; i > 0; i --, mask ++)
1533 if (mask->type == AUTH_NAME || mask->type == AUTH_INTERFACE)
1534 free(mask->mask.name.name);
1535
1536 if (loc->num_allow > 0)
1537 free(loc->allow);
1538
1539 for (i = loc->num_deny, mask = loc->deny; i > 0; i --, mask ++)
1540 if (mask->type == AUTH_NAME || mask->type == AUTH_INTERFACE)
1541 free(mask->mask.name.name);
1542
1543 if (loc->num_deny > 0)
1544 free(loc->deny);
1545
1546 free(loc->location);
1547 free(loc);
1548 }
1549
1550
1551 /*
1552 * 'cupsdDenyHost()' - Add a host name that is not allowed to access the
1553 * location.
1554 */
1555
1556 void
1557 cupsdDenyHost(cupsd_location_t *loc, /* I - Location to add to */
1558 char *name) /* I - Name of host or domain to add */
1559 {
1560 cupsd_authmask_t *temp; /* New host/domain mask */
1561 char ifname[32], /* Interface name */
1562 *ifptr; /* Pointer to end of name */
1563
1564
1565 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdDenyHost(loc=%p(%s), name=\"%s\")",
1566 loc, loc->location ? loc->location : "nil", name);
1567
1568 if ((temp = add_deny(loc)) == NULL)
1569 return;
1570
1571 if (!strcasecmp(name, "@LOCAL"))
1572 {
1573 /*
1574 * Deny *interface*...
1575 */
1576
1577 temp->type = AUTH_INTERFACE;
1578 temp->mask.name.name = strdup("*");
1579 temp->mask.name.length = 1;
1580 }
1581 else if (!strncasecmp(name, "@IF(", 4))
1582 {
1583 /*
1584 * Deny *interface*...
1585 */
1586
1587 strlcpy(ifname, name + 4, sizeof(ifname));
1588
1589 ifptr = ifname + strlen(ifname);
1590
1591 if (ifptr[-1] == ')')
1592 {
1593 ifptr --;
1594 *ifptr = '\0';
1595 }
1596
1597 temp->type = AUTH_INTERFACE;
1598 temp->mask.name.name = strdup(ifname);
1599 temp->mask.name.length = ifptr - ifname;
1600 }
1601 else
1602 {
1603 /*
1604 * Deny name...
1605 */
1606
1607 temp->type = AUTH_NAME;
1608 temp->mask.name.name = strdup(name);
1609 temp->mask.name.length = strlen(name);
1610 }
1611 }
1612
1613
1614 /*
1615 * 'cupsdDenyIP()' - Add an IP address or network that is not allowed to
1616 * access the location.
1617 */
1618
1619 void
1620 cupsdDenyIP(cupsd_location_t *loc, /* I - Location to add to */
1621 unsigned address[4],/* I - IP address to add */
1622 unsigned netmask[4])/* I - Netmask of address */
1623 {
1624 cupsd_authmask_t *temp; /* New host/domain mask */
1625
1626
1627 cupsdLogMessage(CUPSD_LOG_DEBUG,
1628 "cupsdDenyIP(loc=%p(%s), address=%x:%x:%x:%x, netmask=%x:%x:%x:%x)",
1629 loc, loc->location ? loc->location : "nil",
1630 address[0], address[1], address[2], address[3],
1631 netmask[0], netmask[1], netmask[2], netmask[3]);
1632
1633 if ((temp = add_deny(loc)) == NULL)
1634 return;
1635
1636 temp->type = AUTH_IP;
1637 memcpy(temp->mask.ip.address, address, sizeof(temp->mask.ip.address));
1638 memcpy(temp->mask.ip.netmask, netmask, sizeof(temp->mask.ip.netmask));
1639 }
1640
1641
1642 /*
1643 * 'cupsdFindBest()' - Find the location entry that best matches the resource.
1644 */
1645
1646 cupsd_location_t * /* O - Location that matches */
1647 cupsdFindBest(const char *path, /* I - Resource path */
1648 http_state_t state) /* I - HTTP state/request */
1649 {
1650 char uri[HTTP_MAX_URI],
1651 /* URI in request... */
1652 *uriptr; /* Pointer into URI */
1653 cupsd_location_t *loc, /* Current location */
1654 *best; /* Best match for location so far */
1655 int bestlen; /* Length of best match */
1656 int limit; /* Limit field */
1657 static const int limits[] = /* Map http_status_t to AUTH_LIMIT_xyz */
1658 {
1659 AUTH_LIMIT_ALL,
1660 AUTH_LIMIT_OPTIONS,
1661 AUTH_LIMIT_GET,
1662 AUTH_LIMIT_GET,
1663 AUTH_LIMIT_HEAD,
1664 AUTH_LIMIT_POST,
1665 AUTH_LIMIT_POST,
1666 AUTH_LIMIT_POST,
1667 AUTH_LIMIT_PUT,
1668 AUTH_LIMIT_PUT,
1669 AUTH_LIMIT_DELETE,
1670 AUTH_LIMIT_TRACE,
1671 AUTH_LIMIT_ALL,
1672 AUTH_LIMIT_ALL
1673 };
1674
1675
1676 /*
1677 * First copy the connection URI to a local string so we have drop
1678 * any .ppd extension from the pathname in /printers or /classes
1679 * URIs...
1680 */
1681
1682 strlcpy(uri, path, sizeof(uri));
1683
1684 if (!strncmp(uri, "/printers/", 10) ||
1685 !strncmp(uri, "/classes/", 9))
1686 {
1687 /*
1688 * Check if the URI has .ppd on the end...
1689 */
1690
1691 uriptr = uri + strlen(uri) - 4; /* len > 4 if we get here... */
1692
1693 if (!strcmp(uriptr, ".ppd"))
1694 *uriptr = '\0';
1695 }
1696
1697 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindBest: uri = \"%s\"...", uri);
1698
1699 /*
1700 * Loop through the list of locations to find a match...
1701 */
1702
1703 limit = limits[state];
1704 best = NULL;
1705 bestlen = 0;
1706
1707 for (loc = (cupsd_location_t *)cupsArrayFirst(Locations);
1708 loc;
1709 loc = (cupsd_location_t *)cupsArrayNext(Locations))
1710 {
1711 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindBest: Location %s Limit %x",
1712 loc->location ? loc->location : "nil", loc->limit);
1713
1714 if (!strncmp(uri, "/printers/", 10) || !strncmp(uri, "/classes/", 9))
1715 {
1716 /*
1717 * Use case-insensitive comparison for queue names...
1718 */
1719
1720 if (loc->length > bestlen && loc->location &&
1721 !strncasecmp(uri, loc->location, loc->length) &&
1722 loc->location[0] == '/' &&
1723 (limit & loc->limit) != 0)
1724 {
1725 best = loc;
1726 bestlen = loc->length;
1727 }
1728 }
1729 else
1730 {
1731 /*
1732 * Use case-sensitive comparison for other URIs...
1733 */
1734
1735 if (loc->length > bestlen && loc->location &&
1736 !strncmp(uri, loc->location, loc->length) &&
1737 loc->location[0] == '/' &&
1738 (limit & loc->limit) != 0)
1739 {
1740 best = loc;
1741 bestlen = loc->length;
1742 }
1743 }
1744 }
1745
1746 /*
1747 * Return the match, if any...
1748 */
1749
1750 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindBest: best = %s",
1751 best ? best->location : "NONE");
1752
1753 return (best);
1754 }
1755
1756
1757 /*
1758 * 'cupsdFindLocation()' - Find the named location.
1759 */
1760
1761 cupsd_location_t * /* O - Location that matches */
1762 cupsdFindLocation(const char *location) /* I - Connection */
1763 {
1764 cupsd_location_t key; /* Search key */
1765
1766
1767 key.location = (char *)location;
1768
1769 return ((cupsd_location_t *)cupsArrayFind(Locations, &key));
1770 }
1771
1772
1773 /*
1774 * 'cupsdIsAuthorized()' - Check to see if the user is authorized...
1775 */
1776
1777 http_status_t /* O - HTTP_OK if authorized or error code */
1778 cupsdIsAuthorized(cupsd_client_t *con, /* I - Connection */
1779 const char *owner)/* I - Owner of object */
1780 {
1781 int i, j, /* Looping vars */
1782 auth; /* Authorization status */
1783 unsigned address[4]; /* Authorization address */
1784 cupsd_location_t *best; /* Best match for location so far */
1785 int hostlen; /* Length of hostname */
1786 const char *username; /* Username to authorize */
1787 struct passwd *pw; /* User password data */
1788 static const char * const levels[] = /* Auth levels */
1789 {
1790 "ANON",
1791 "USER",
1792 "GROUP"
1793 };
1794 static const char * const types[] = /* Auth types */
1795 {
1796 "NONE",
1797 "BASIC",
1798 "DIGEST",
1799 "BASICDIGEST",
1800 "KERBEROS"
1801 };
1802
1803
1804 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1805 "cupsdIsAuthorized: con->uri=\"%s\", con->best=%p(%s)",
1806 con->uri, con->best, con->best ? con->best->location ?
1807 con->best->location : "(null)" : "");
1808 if (owner)
1809 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1810 "cupsdIsAuthorized: owner=\"%s\"", owner);
1811
1812 /*
1813 * If there is no "best" authentication rule for this request, then
1814 * access is allowed from the local system and denied from other
1815 * addresses...
1816 */
1817
1818 if (!con->best)
1819 {
1820 if (!strcmp(con->http.hostname, "localhost") ||
1821 !strcmp(con->http.hostname, ServerName))
1822 return (HTTP_OK);
1823 else
1824 return (HTTP_FORBIDDEN);
1825 }
1826
1827 best = con->best;
1828
1829 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1830 "cupsdIsAuthorized: level=AUTH_%s, type=AUTH_%s, "
1831 "satisfy=AUTH_SATISFY_%s, num_names=%d",
1832 levels[best->level], types[best->type],
1833 best->satisfy ? "ANY" : "ALL", best->num_names);
1834
1835 if (best->limit == AUTH_LIMIT_IPP)
1836 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdIsAuthorized: op=%x(%s)",
1837 best->op, ippOpString(best->op));
1838
1839 /*
1840 * Check host/ip-based accesses...
1841 */
1842
1843 #ifdef AF_INET6
1844 if (con->http.hostaddr->addr.sa_family == AF_INET6)
1845 {
1846 /*
1847 * Copy IPv6 address...
1848 */
1849
1850 address[0] = ntohl(con->http.hostaddr->ipv6.sin6_addr.s6_addr32[0]);
1851 address[1] = ntohl(con->http.hostaddr->ipv6.sin6_addr.s6_addr32[1]);
1852 address[2] = ntohl(con->http.hostaddr->ipv6.sin6_addr.s6_addr32[2]);
1853 address[3] = ntohl(con->http.hostaddr->ipv6.sin6_addr.s6_addr32[3]);
1854 }
1855 else
1856 #endif /* AF_INET6 */
1857 if (con->http.hostaddr->addr.sa_family == AF_INET)
1858 {
1859 /*
1860 * Copy IPv4 address...
1861 */
1862
1863 address[0] = 0;
1864 address[1] = 0;
1865 address[2] = 0;
1866 address[3] = ntohl(con->http.hostaddr->ipv4.sin_addr.s_addr);
1867 }
1868 else
1869 memset(address, 0, sizeof(address));
1870
1871 hostlen = strlen(con->http.hostname);
1872
1873 if (!strcasecmp(con->http.hostname, "localhost"))
1874 {
1875 /*
1876 * Access from localhost (127.0.0.1 or ::1) is always allowed...
1877 */
1878
1879 auth = AUTH_ALLOW;
1880 }
1881 else
1882 {
1883 /*
1884 * Do authorization checks on the domain/address...
1885 */
1886
1887 switch (best->order_type)
1888 {
1889 default :
1890 auth = AUTH_DENY; /* anti-compiler-warning-code */
1891 break;
1892
1893 case AUTH_ALLOW : /* Order Deny,Allow */
1894 auth = AUTH_ALLOW;
1895
1896 if (cupsdCheckAuth(address, con->http.hostname, hostlen,
1897 best->num_deny, best->deny))
1898 auth = AUTH_DENY;
1899
1900 if (cupsdCheckAuth(address, con->http.hostname, hostlen,
1901 best->num_allow, best->allow))
1902 auth = AUTH_ALLOW;
1903 break;
1904
1905 case AUTH_DENY : /* Order Allow,Deny */
1906 auth = AUTH_DENY;
1907
1908 if (cupsdCheckAuth(address, con->http.hostname, hostlen,
1909 best->num_allow, best->allow))
1910 auth = AUTH_ALLOW;
1911
1912 if (cupsdCheckAuth(address, con->http.hostname, hostlen,
1913 best->num_deny, best->deny))
1914 auth = AUTH_DENY;
1915 break;
1916 }
1917 }
1918
1919 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdIsAuthorized: auth=AUTH_%s...",
1920 auth ? "DENY" : "ALLOW");
1921
1922 if (auth == AUTH_DENY && best->satisfy == AUTH_SATISFY_ALL)
1923 return (HTTP_FORBIDDEN);
1924
1925 #ifdef HAVE_SSL
1926 /*
1927 * See if encryption is required...
1928 */
1929
1930 if ((best->encryption >= HTTP_ENCRYPT_REQUIRED && !con->http.tls &&
1931 strcasecmp(con->http.hostname, "localhost") &&
1932 best->satisfy == AUTH_SATISFY_ALL) &&
1933 !(best->type == AUTH_NEGOTIATE ||
1934 (best->type == AUTH_NONE && DefaultAuthType == AUTH_NEGOTIATE)))
1935 {
1936 cupsdLogMessage(CUPSD_LOG_DEBUG,
1937 "cupsdIsAuthorized: Need upgrade to TLS...");
1938 return (HTTP_UPGRADE_REQUIRED);
1939 }
1940 #endif /* HAVE_SSL */
1941
1942 /*
1943 * Now see what access level is required...
1944 */
1945
1946 if (best->level == AUTH_ANON || /* Anonymous access - allow it */
1947 (best->type == AUTH_NONE && best->num_names == 0))
1948 return (HTTP_OK);
1949
1950 if (!con->username[0] && best->type == AUTH_NONE &&
1951 best->limit == AUTH_LIMIT_IPP)
1952 {
1953 /*
1954 * Check for unauthenticated username...
1955 */
1956
1957 ipp_attribute_t *attr; /* requesting-user-name attribute */
1958
1959
1960 attr = ippFindAttribute(con->request, "requesting-user-name", IPP_TAG_NAME);
1961 if (attr)
1962 {
1963 cupsdLogMessage(CUPSD_LOG_DEBUG,
1964 "cupsdIsAuthorized: requesting-user-name=\"%s\"",
1965 attr->values[0].string.text);
1966 username = attr->values[0].string.text;
1967 }
1968 else if (best->satisfy == AUTH_SATISFY_ALL || auth == AUTH_DENY)
1969 return (HTTP_UNAUTHORIZED); /* Non-anonymous needs user/pass */
1970 else
1971 return (HTTP_OK); /* unless overridden with Satisfy */
1972 }
1973 else
1974 {
1975 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdIsAuthorized: username=\"%s\"",
1976 con->username);
1977
1978 #ifdef HAVE_AUTHORIZATION_H
1979 if (!con->username[0] && !con->authref)
1980 #else
1981 if (!con->username[0])
1982 #endif /* HAVE_AUTHORIZATION_H */
1983 {
1984 if (best->satisfy == AUTH_SATISFY_ALL || auth == AUTH_DENY)
1985 return (HTTP_UNAUTHORIZED); /* Non-anonymous needs user/pass */
1986 else
1987 return (HTTP_OK); /* unless overridden with Satisfy */
1988 }
1989
1990 username = con->username;
1991 }
1992
1993 /*
1994 * OK, got a username. See if we need normal user access, or group
1995 * access... (root always matches)
1996 */
1997
1998 if (!strcmp(username, "root"))
1999 return (HTTP_OK);
2000
2001 /*
2002 * Get the user info...
2003 */
2004
2005 if (username[0])
2006 {
2007 pw = getpwnam(username);
2008 endpwent();
2009 }
2010 else
2011 pw = NULL;
2012
2013 if (best->level == AUTH_USER)
2014 {
2015 /*
2016 * If there are no names associated with this location, then
2017 * any valid user is OK...
2018 */
2019
2020 if (best->num_names == 0)
2021 return (HTTP_OK);
2022
2023 /*
2024 * Otherwise check the user list and return OK if this user is
2025 * allowed...
2026 */
2027
2028 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2029 "cupsdIsAuthorized: Checking user membership...");
2030
2031 #ifdef HAVE_AUTHORIZATION_H
2032 /*
2033 * If an authorization reference was supplied it must match a right name...
2034 */
2035
2036 if (con->authref)
2037 {
2038 for (i = 0; i < best->num_names; i ++)
2039 {
2040 if (!strncasecmp(best->names[i], "@AUTHKEY(", 9) &&
2041 check_authref(con, best->names[i] + 9))
2042 return (HTTP_OK);
2043 else if (!strcasecmp(best->names[i], "@SYSTEM") &&
2044 SystemGroupAuthKey &&
2045 check_authref(con, SystemGroupAuthKey))
2046 return (HTTP_OK);
2047 }
2048
2049 return (HTTP_UNAUTHORIZED);
2050 }
2051 #endif /* HAVE_AUTHORIZATION_H */
2052
2053 for (i = 0; i < best->num_names; i ++)
2054 {
2055 if (!strcasecmp(best->names[i], "@OWNER") && owner &&
2056 !strcasecmp(username, owner))
2057 return (HTTP_OK);
2058 else if (!strcasecmp(best->names[i], "@SYSTEM"))
2059 {
2060 for (j = 0; j < NumSystemGroups; j ++)
2061 if (cupsdCheckGroup(username, pw, SystemGroups[j]))
2062 return (HTTP_OK);
2063 }
2064 else if (best->names[i][0] == '@')
2065 {
2066 if (cupsdCheckGroup(username, pw, best->names[i] + 1))
2067 return (HTTP_OK);
2068 }
2069 else if (!strcasecmp(username, best->names[i]))
2070 return (HTTP_OK);
2071 }
2072
2073 return (HTTP_UNAUTHORIZED);
2074 }
2075
2076 /*
2077 * Check to see if this user is in any of the named groups...
2078 */
2079
2080 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2081 "cupsdIsAuthorized: Checking group membership...");
2082
2083 /*
2084 * Check to see if this user is in any of the named groups...
2085 */
2086
2087 for (i = 0; i < best->num_names; i ++)
2088 {
2089 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2090 "cupsdIsAuthorized: Checking group \"%s\" membership...",
2091 best->names[i]);
2092
2093 if (!strcasecmp(best->names[i], "@SYSTEM"))
2094 {
2095 for (j = 0; j < NumSystemGroups; j ++)
2096 if (cupsdCheckGroup(username, pw, SystemGroups[j]))
2097 return (HTTP_OK);
2098 }
2099 else if (cupsdCheckGroup(username, pw, best->names[i]))
2100 return (HTTP_OK);
2101 }
2102
2103 /*
2104 * The user isn't part of the specified group, so deny access...
2105 */
2106
2107 cupsdLogMessage(CUPSD_LOG_DEBUG,
2108 "cupsdIsAuthorized: User not in group(s)!");
2109
2110 return (HTTP_UNAUTHORIZED);
2111 }
2112
2113
2114 /*
2115 * 'add_allow()' - Add an allow mask to the location.
2116 */
2117
2118 static cupsd_authmask_t * /* O - New mask record */
2119 add_allow(cupsd_location_t *loc) /* I - Location to add to */
2120 {
2121 cupsd_authmask_t *temp; /* New mask record */
2122
2123
2124 /*
2125 * Range-check...
2126 */
2127
2128 if (loc == NULL)
2129 return (NULL);
2130
2131 /*
2132 * Try to allocate memory for the record...
2133 */
2134
2135 if (loc->num_allow == 0)
2136 temp = malloc(sizeof(cupsd_authmask_t));
2137 else
2138 temp = realloc(loc->allow, sizeof(cupsd_authmask_t) * (loc->num_allow + 1));
2139
2140 if (temp == NULL)
2141 return (NULL);
2142
2143 loc->allow = temp;
2144 temp += loc->num_allow;
2145 loc->num_allow ++;
2146
2147 /*
2148 * Clear the mask record and return...
2149 */
2150
2151 memset(temp, 0, sizeof(cupsd_authmask_t));
2152 return (temp);
2153 }
2154
2155
2156 /*
2157 * 'add_deny()' - Add a deny mask to the location.
2158 */
2159
2160 static cupsd_authmask_t * /* O - New mask record */
2161 add_deny(cupsd_location_t *loc) /* I - Location to add to */
2162 {
2163 cupsd_authmask_t *temp; /* New mask record */
2164
2165
2166 /*
2167 * Range-check...
2168 */
2169
2170 if (loc == NULL)
2171 return (NULL);
2172
2173 /*
2174 * Try to allocate memory for the record...
2175 */
2176
2177 if (loc->num_deny == 0)
2178 temp = malloc(sizeof(cupsd_authmask_t));
2179 else
2180 temp = realloc(loc->deny, sizeof(cupsd_authmask_t) * (loc->num_deny + 1));
2181
2182 if (temp == NULL)
2183 return (NULL);
2184
2185 loc->deny = temp;
2186 temp += loc->num_deny;
2187 loc->num_deny ++;
2188
2189 /*
2190 * Clear the mask record and return...
2191 */
2192
2193 memset(temp, 0, sizeof(cupsd_authmask_t));
2194 return (temp);
2195 }
2196
2197
2198 #ifdef HAVE_AUTHORIZATION_H
2199 /*
2200 * 'check_authref()' - Check if an authorization services reference has the
2201 * supplied right.
2202 */
2203
2204 static int /* O - 1 if right is valid, 0 otherwise */
2205 check_authref(cupsd_client_t *con, /* I - Connection */
2206 const char *right) /* I - Right name */
2207 {
2208 OSStatus status; /* OS Status */
2209 AuthorizationItem authright; /* Authorization right */
2210 AuthorizationRights authrights; /* Authorization rights */
2211 AuthorizationFlags authflags; /* Authorization flags */
2212
2213
2214 /*
2215 * Check to see if the user is allowed to perform the task...
2216 */
2217
2218 if (!con->authref)
2219 return (0);
2220
2221 authright.name = right;
2222 authright.valueLength = 0;
2223 authright.value = NULL;
2224 authright.flags = 0;
2225
2226 authrights.count = 1;
2227 authrights.items = &authright;
2228
2229 authflags = kAuthorizationFlagDefaults |
2230 kAuthorizationFlagExtendRights;
2231
2232 if ((status = AuthorizationCopyRights(con->authref, &authrights,
2233 kAuthorizationEmptyEnvironment,
2234 authflags, NULL)) != 0)
2235 {
2236 cupsdLogMessage(CUPSD_LOG_ERROR,
2237 "AuthorizationCopyRights(\"%s\") returned %d (%s)",
2238 authright.name, (int)status, cssmErrorString(status));
2239 return (0);
2240 }
2241
2242 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2243 "AuthorizationCopyRights(\"%s\") succeeded!",
2244 authright.name);
2245
2246 return (1);
2247 }
2248 #endif /* HAVE_AUTHORIZATION_H */
2249
2250
2251 /*
2252 * 'compare_locations()' - Compare two locations.
2253 */
2254
2255 static int /* O - Result of comparison */
2256 compare_locations(cupsd_location_t *a, /* I - First location */
2257 cupsd_location_t *b) /* I - Second location */
2258 {
2259 return (strcmp(b->location, a->location));
2260 }
2261
2262
2263 #if !HAVE_LIBPAM && !defined(HAVE_USERSEC_H)
2264 /*
2265 * 'cups_crypt()' - Encrypt the password using the DES or MD5 algorithms,
2266 * as needed.
2267 */
2268
2269 static char * /* O - Encrypted password */
2270 cups_crypt(const char *pw, /* I - Password string */
2271 const char *salt) /* I - Salt (key) string */
2272 {
2273 if (!strncmp(salt, "$1$", 3))
2274 {
2275 /*
2276 * Use MD5 passwords without the benefit of PAM; this is for
2277 * Slackware Linux, and the algorithm was taken from the
2278 * old shadow-19990827/lib/md5crypt.c source code... :(
2279 */
2280
2281 int i; /* Looping var */
2282 unsigned long n; /* Output number */
2283 int pwlen; /* Length of password string */
2284 const char *salt_end; /* End of "salt" data for MD5 */
2285 char *ptr; /* Pointer into result string */
2286 _cups_md5_state_t state; /* Primary MD5 state info */
2287 _cups_md5_state_t state2; /* Secondary MD5 state info */
2288 unsigned char digest[16]; /* MD5 digest result */
2289 static char result[120]; /* Final password string */
2290
2291
2292 /*
2293 * Get the salt data between dollar signs, e.g. $1$saltdata$md5.
2294 * Get a maximum of 8 characters of salt data after $1$...
2295 */
2296
2297 for (salt_end = salt + 3; *salt_end && (salt_end - salt) < 11; salt_end ++)
2298 if (*salt_end == '$')
2299 break;
2300
2301 /*
2302 * Compute the MD5 sum we need...
2303 */
2304
2305 pwlen = strlen(pw);
2306
2307 _cupsMD5Init(&state);
2308 _cupsMD5Append(&state, (unsigned char *)pw, pwlen);
2309 _cupsMD5Append(&state, (unsigned char *)salt, salt_end - salt);
2310
2311 _cupsMD5Init(&state2);
2312 _cupsMD5Append(&state2, (unsigned char *)pw, pwlen);
2313 _cupsMD5Append(&state2, (unsigned char *)salt + 3, salt_end - salt - 3);
2314 _cupsMD5Append(&state2, (unsigned char *)pw, pwlen);
2315 _cupsMD5Finish(&state2, digest);
2316
2317 for (i = pwlen; i > 0; i -= 16)
2318 _cupsMD5Append(&state, digest, i > 16 ? 16 : i);
2319
2320 for (i = pwlen; i > 0; i >>= 1)
2321 _cupsMD5Append(&state, (unsigned char *)((i & 1) ? "" : pw), 1);
2322
2323 _cupsMD5Finish(&state, digest);
2324
2325 for (i = 0; i < 1000; i ++)
2326 {
2327 _cupsMD5Init(&state);
2328
2329 if (i & 1)
2330 _cupsMD5Append(&state, (unsigned char *)pw, pwlen);
2331 else
2332 _cupsMD5Append(&state, digest, 16);
2333
2334 if (i % 3)
2335 _cupsMD5Append(&state, (unsigned char *)salt + 3, salt_end - salt - 3);
2336
2337 if (i % 7)
2338 _cupsMD5Append(&state, (unsigned char *)pw, pwlen);
2339
2340 if (i & 1)
2341 _cupsMD5Append(&state, digest, 16);
2342 else
2343 _cupsMD5Append(&state, (unsigned char *)pw, pwlen);
2344
2345 _cupsMD5Finish(&state, digest);
2346 }
2347
2348 /*
2349 * Copy the final sum to the result string and return...
2350 */
2351
2352 memcpy(result, salt, salt_end - salt);
2353 ptr = result + (salt_end - salt);
2354 *ptr++ = '$';
2355
2356 for (i = 0; i < 5; i ++, ptr += 4)
2357 {
2358 n = (((digest[i] << 8) | digest[i + 6]) << 8);
2359
2360 if (i < 4)
2361 n |= digest[i + 12];
2362 else
2363 n |= digest[5];
2364
2365 to64(ptr, n, 4);
2366 }
2367
2368 to64(ptr, digest[11], 2);
2369 ptr += 2;
2370 *ptr = '\0';
2371
2372 return (result);
2373 }
2374 else
2375 {
2376 /*
2377 * Use the standard crypt() function...
2378 */
2379
2380 return (crypt(pw, salt));
2381 }
2382 }
2383 #endif /* !HAVE_LIBPAM && !HAVE_USERSEC_H */
2384
2385
2386 #ifdef HAVE_GSSAPI
2387 /*
2388 * 'get_gss_creds()' - Obtain GSS credentials.
2389 */
2390
2391 static gss_cred_id_t /* O - Server credentials */
2392 get_gss_creds(const char *service_name) /* I - Service name */
2393 {
2394 OM_uint32 major_status, /* Major status code */
2395 minor_status; /* Minor status code */
2396 gss_name_t server_name; /* Server name */
2397 gss_cred_id_t server_creds; /* Server credentials */
2398 gss_buffer_desc token = GSS_C_EMPTY_BUFFER;
2399 /* Service name token */
2400 char buf[1024], /* Service name buffer */
2401 fqdn[HTTP_MAX_URI]; /* Hostname of server */
2402
2403
2404 snprintf(buf, sizeof(buf), "%s@%s", service_name,
2405 httpGetHostname(NULL, fqdn, sizeof(fqdn)));
2406
2407 token.value = buf;
2408 token.length = strlen(buf);
2409 server_name = GSS_C_NO_NAME;
2410 major_status = gss_import_name(&minor_status, &token,
2411 GSS_C_NT_HOSTBASED_SERVICE,
2412 &server_name);
2413
2414 memset(&token, 0, sizeof(token));
2415
2416 if (GSS_ERROR(major_status))
2417 {
2418 cupsdLogGSSMessage(CUPSD_LOG_WARN, major_status, minor_status,
2419 "gss_import_name() failed");
2420 return (NULL);
2421 }
2422
2423 major_status = gss_display_name(&minor_status, server_name, &token, NULL);
2424
2425 if (GSS_ERROR(major_status))
2426 {
2427 cupsdLogGSSMessage(CUPSD_LOG_WARN, major_status, minor_status,
2428 "gss_display_name() failed");
2429 return (NULL);
2430 }
2431
2432 cupsdLogMessage(CUPSD_LOG_DEBUG,
2433 "get_gss_creds: Attempting to acquire credentials for %s...",
2434 (char *)token.value);
2435
2436 server_creds = GSS_C_NO_CREDENTIAL;
2437 major_status = gss_acquire_cred(&minor_status, server_name, GSS_C_INDEFINITE,
2438 GSS_C_NO_OID_SET, GSS_C_ACCEPT,
2439 &server_creds, NULL, NULL);
2440 if (GSS_ERROR(major_status))
2441 {
2442 cupsdLogGSSMessage(CUPSD_LOG_WARN, major_status, minor_status,
2443 "gss_acquire_cred() failed");
2444 gss_release_name(&minor_status, &server_name);
2445 gss_release_buffer(&minor_status, &token);
2446 return (NULL);
2447 }
2448
2449 cupsdLogMessage(CUPSD_LOG_DEBUG,
2450 "get_gss_creds: Credentials acquired successfully for %s.",
2451 (char *)token.value);
2452
2453 gss_release_name(&minor_status, &server_name);
2454 gss_release_buffer(&minor_status, &token);
2455
2456 return (server_creds);
2457 }
2458 #endif /* HAVE_GSSAPI */
2459
2460
2461 /*
2462 * 'get_md5_password()' - Get an MD5 password.
2463 */
2464
2465 static char * /* O - MD5 password string */
2466 get_md5_password(const char *username, /* I - Username */
2467 const char *group, /* I - Group */
2468 char passwd[33]) /* O - MD5 password string */
2469 {
2470 cups_file_t *fp; /* passwd.md5 file */
2471 char filename[1024], /* passwd.md5 filename */
2472 line[256], /* Line from file */
2473 tempuser[33], /* User from file */
2474 tempgroup[33]; /* Group from file */
2475
2476
2477 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2478 "get_md5_password(username=\"%s\", group=\"%s\", passwd=%p)",
2479 username, group ? group : "(null)", passwd);
2480
2481 snprintf(filename, sizeof(filename), "%s/passwd.md5", ServerRoot);
2482 if ((fp = cupsFileOpen(filename, "r")) == NULL)
2483 {
2484 if (errno != ENOENT)
2485 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open %s - %s", filename,
2486 strerror(errno));
2487
2488 return (NULL);
2489 }
2490
2491 while (cupsFileGets(fp, line, sizeof(line)) != NULL)
2492 {
2493 if (sscanf(line, "%32[^:]:%32[^:]:%32s", tempuser, tempgroup, passwd) != 3)
2494 {
2495 cupsdLogMessage(CUPSD_LOG_ERROR, "Bad MD5 password line: %s", line);
2496 continue;
2497 }
2498
2499 if (!strcmp(username, tempuser) &&
2500 (group == NULL || !strcmp(group, tempgroup)))
2501 {
2502 /*
2503 * Found the password entry!
2504 */
2505
2506 cupsdLogMessage(CUPSD_LOG_DEBUG2, "Found MD5 user %s, group %s...",
2507 username, tempgroup);
2508
2509 cupsFileClose(fp);
2510 return (passwd);
2511 }
2512 }
2513
2514 /*
2515 * Didn't find a password entry - return NULL!
2516 */
2517
2518 cupsFileClose(fp);
2519 return (NULL);
2520 }
2521
2522
2523 #if HAVE_LIBPAM
2524 /*
2525 * 'pam_func()' - PAM conversation function.
2526 */
2527
2528 static int /* O - Success or failure */
2529 pam_func(
2530 int num_msg, /* I - Number of messages */
2531 const struct pam_message **msg, /* I - Messages */
2532 struct pam_response **resp, /* O - Responses */
2533 void *appdata_ptr)
2534 /* I - Pointer to connection */
2535 {
2536 int i; /* Looping var */
2537 struct pam_response *replies; /* Replies */
2538 cupsd_authdata_t *data; /* Pointer to auth data */
2539
2540
2541 /*
2542 * Allocate memory for the responses...
2543 */
2544
2545 if ((replies = malloc(sizeof(struct pam_response) * num_msg)) == NULL)
2546 return (PAM_CONV_ERR);
2547
2548 /*
2549 * Answer all of the messages...
2550 */
2551
2552 DEBUG_printf(("pam_func: appdata_ptr = %p\n", appdata_ptr));
2553
2554 #ifdef __hpux
2555 /*
2556 * Apparently some versions of HP-UX 11 have a broken pam_unix security
2557 * module. This is a workaround...
2558 */
2559
2560 data = auth_data;
2561 (void)appdata_ptr;
2562 #else
2563 data = (cupsd_authdata_t *)appdata_ptr;
2564 #endif /* __hpux */
2565
2566 for (i = 0; i < num_msg; i ++)
2567 {
2568 DEBUG_printf(("pam_func: Message = \"%s\"\n", msg[i]->msg));
2569
2570 switch (msg[i]->msg_style)
2571 {
2572 case PAM_PROMPT_ECHO_ON:
2573 DEBUG_printf(("pam_func: PAM_PROMPT_ECHO_ON, returning \"%s\"...\n",
2574 data->username));
2575 replies[i].resp_retcode = PAM_SUCCESS;
2576 replies[i].resp = strdup(data->username);
2577 break;
2578
2579 case PAM_PROMPT_ECHO_OFF:
2580 DEBUG_printf(("pam_func: PAM_PROMPT_ECHO_OFF, returning \"%s\"...\n",
2581 data->password));
2582 replies[i].resp_retcode = PAM_SUCCESS;
2583 replies[i].resp = strdup(data->password);
2584 break;
2585
2586 case PAM_TEXT_INFO:
2587 DEBUG_puts("pam_func: PAM_TEXT_INFO...");
2588 replies[i].resp_retcode = PAM_SUCCESS;
2589 replies[i].resp = NULL;
2590 break;
2591
2592 case PAM_ERROR_MSG:
2593 DEBUG_puts("pam_func: PAM_ERROR_MSG...");
2594 replies[i].resp_retcode = PAM_SUCCESS;
2595 replies[i].resp = NULL;
2596 break;
2597
2598 default:
2599 DEBUG_printf(("pam_func: Unknown PAM message %d...\n",
2600 msg[i]->msg_style));
2601 free(replies);
2602 return (PAM_CONV_ERR);
2603 }
2604 }
2605
2606 /*
2607 * Return the responses back to PAM...
2608 */
2609
2610 *resp = replies;
2611
2612 return (PAM_SUCCESS);
2613 }
2614 #elif !defined(HAVE_USERSEC_H)
2615
2616
2617 /*
2618 * 'to64()' - Base64-encode an integer value...
2619 */
2620
2621 static void
2622 to64(char *s, /* O - Output string */
2623 unsigned long v, /* I - Value to encode */
2624 int n) /* I - Number of digits */
2625 {
2626 const char *itoa64 = "./0123456789"
2627 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
2628 "abcdefghijklmnopqrstuvwxyz";
2629
2630
2631 for (; n > 0; n --, v >>= 6)
2632 *s++ = itoa64[v & 0x3f];
2633 }
2634 #endif /* HAVE_LIBPAM */
2635
2636
2637 /*
2638 * End of "$Id: auth.c 6758 2007-08-02 00:13:44Z mike $".
2639 */
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