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Merge changes from CUPS 1.4svn-r8394.
[thirdparty/cups.git] / scheduler / client.c
1 /*
2 * "$Id: client.c 7950 2008-09-17 00:21:59Z mike $"
3 *
4 * Client routines for the Common UNIX Printing System (CUPS) scheduler.
5 *
6 * Copyright 2007-2009 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 * cupsdAcceptClient() - Accept a new client.
21 * cupsdCloseAllClients() - Close all remote clients immediately.
22 * cupsdCloseClient() - Close a remote client.
23 * cupsdFlushHeader() - Flush the header fields to the client.
24 * cupsdReadClient() - Read data from a client.
25 * cupsdSendCommand() - Send output from a command via HTTP.
26 * cupsdSendError() - Send an error message via HTTP.
27 * cupsdSendHeader() - Send an HTTP request.
28 * cupsdUpdateCGI() - Read status messages from CGI scripts and programs.
29 * cupsdWriteClient() - Write data to a client as needed.
30 * check_if_modified() - Decode an "If-Modified-Since" line.
31 * compare_clients() - Compare two client connections.
32 * data_ready() - Check whether data is available from a client.
33 * encrypt_client() - Enable encryption for the client...
34 * get_cdsa_certificate() - Convert a keychain name into the CFArrayRef
35 * required by SSLSetCertificate.
36 * get_file() - Get a filename and state info.
37 * install_conf_file() - Install a configuration file.
38 * is_cgi() - Is the resource a CGI script/program?
39 * is_path_absolute() - Is a path absolute and free of relative elements.
40 * make_certificate() - Make a self-signed SSL/TLS certificate.
41 * pipe_command() - Pipe the output of a command to the remote client.
42 * write_file() - Send a file via HTTP.
43 * write_pipe() - Flag that data is available on the CGI pipe.
44 */
45
46 /*
47 * Include necessary headers...
48 */
49
50 #include "cupsd.h"
51
52 #ifdef HAVE_CDSASSL
53 # include <Security/Security.h>
54 # ifdef HAVE_SECIDENTITYSEARCHPRIV_H
55 # include <Security/SecIdentitySearchPriv.h>
56 # else /* Declare prototype for function in that header... */
57 extern OSStatus SecIdentitySearchCreateWithPolicy(SecPolicyRef policy,
58 CFStringRef idString, CSSM_KEYUSE keyUsage,
59 CFTypeRef keychainOrArray,
60 Boolean returnOnlyValidIdentities,
61 SecIdentitySearchRef* searchRef);
62 # endif /* HAVE_SECIDENTITYSEARCHPRIV_H */
63 # ifdef HAVE_SECPOLICYPRIV_H
64 # include <Security/SecPolicyPriv.h>
65 # else /* Declare prototype for function in that header... */
66 extern OSStatus SecPolicySetValue(SecPolicyRef policyRef,
67 const CSSM_DATA *value);
68 # endif /* HAVE_SECPOLICYPRIV_H */
69 # ifdef HAVE_SECBASEPRIV_H
70 # include <Security/SecBasePriv.h>
71 # else /* Declare prototype for function in that header... */
72 extern const char *cssmErrorString(int error);
73 # endif /* HAVE_SECBASEPRIV_H */
74 #endif /* HAVE_CDSASSL */
75
76 #ifdef HAVE_GNUTLS
77 # include <gnutls/x509.h>
78 #endif /* HAVE_GNUTLS */
79
80 #ifdef HAVE_TCPD_H
81 # include <tcpd.h>
82 #endif /* HAVE_TCPD_H */
83
84
85 /*
86 * Local functions...
87 */
88
89 static int check_if_modified(cupsd_client_t *con,
90 struct stat *filestats);
91 static int compare_clients(cupsd_client_t *a, cupsd_client_t *b,
92 void *data);
93 static int data_ready(cupsd_client_t *con);
94 #ifdef HAVE_SSL
95 static int encrypt_client(cupsd_client_t *con);
96 #endif /* HAVE_SSL */
97 #ifdef HAVE_CDSASSL
98 static CFArrayRef get_cdsa_certificate(cupsd_client_t *con);
99 #endif /* HAVE_CDSASSL */
100 static char *get_file(cupsd_client_t *con, struct stat *filestats,
101 char *filename, int len);
102 static http_status_t install_conf_file(cupsd_client_t *con);
103 static int is_cgi(cupsd_client_t *con, const char *filename,
104 struct stat *filestats, mime_type_t *type);
105 static int is_path_absolute(const char *path);
106 #ifdef HAVE_SSL
107 static int make_certificate(cupsd_client_t *con);
108 #endif /* HAVE_SSL */
109 static int pipe_command(cupsd_client_t *con, int infile, int *outfile,
110 char *command, char *options, int root);
111 static int write_file(cupsd_client_t *con, http_status_t code,
112 char *filename, char *type,
113 struct stat *filestats);
114 static void write_pipe(cupsd_client_t *con);
115
116
117 /*
118 * 'cupsdAcceptClient()' - Accept a new client.
119 */
120
121 void
122 cupsdAcceptClient(cupsd_listener_t *lis)/* I - Listener socket */
123 {
124 int count; /* Count of connections on a host */
125 int val; /* Parameter value */
126 cupsd_client_t *con, /* New client pointer */
127 *tempcon; /* Temporary client pointer */
128 http_addrlist_t *addrlist, /* List of adddresses for host */
129 *addr; /* Current address */
130 socklen_t addrlen; /* Length of address */
131 char *hostname; /* Hostname for address */
132 http_addr_t temp; /* Temporary address variable */
133 static time_t last_dos = 0; /* Time of last DoS attack */
134 #ifdef HAVE_TCPD_H
135 struct request_info wrap_req; /* TCP wrappers request information */
136 #endif /* HAVE_TCPD_H */
137
138
139 cupsdLogMessage(CUPSD_LOG_DEBUG2,
140 "cupsdAcceptClient(lis=%p(%d)) Clients=%d",
141 lis, lis->fd, cupsArrayCount(Clients));
142
143 /*
144 * Make sure we don't have a full set of clients already...
145 */
146
147 if (cupsArrayCount(Clients) == MaxClients)
148 return;
149
150 /*
151 * Get a pointer to the next available client...
152 */
153
154 if (!Clients)
155 Clients = cupsArrayNew(NULL, NULL);
156
157 if (!Clients)
158 {
159 cupsdLogMessage(CUPSD_LOG_ERROR,
160 "Unable to allocate memory for clients array!");
161 cupsdPauseListening();
162 return;
163 }
164
165 if (!ActiveClients)
166 ActiveClients = cupsArrayNew((cups_array_func_t)compare_clients, NULL);
167
168 if (!ActiveClients)
169 {
170 cupsdLogMessage(CUPSD_LOG_ERROR,
171 "Unable to allocate memory for active clients array!");
172 cupsdPauseListening();
173 return;
174 }
175
176 if ((con = calloc(1, sizeof(cupsd_client_t))) == NULL)
177 {
178 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to allocate memory for client!");
179 cupsdPauseListening();
180 return;
181 }
182
183 con->http.activity = time(NULL);
184 con->file = -1;
185 con->http.hostaddr = &(con->clientaddr);
186
187 /*
188 * Accept the client and get the remote address...
189 */
190
191 addrlen = sizeof(http_addr_t);
192
193 if ((con->http.fd = accept(lis->fd, (struct sockaddr *)con->http.hostaddr,
194 &addrlen)) < 0)
195 {
196 if (errno == ENFILE || errno == EMFILE)
197 cupsdPauseListening();
198
199 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to accept client connection - %s.",
200 strerror(errno));
201 free(con);
202
203 return;
204 }
205
206 #ifdef AF_INET6
207 if (lis->address.addr.sa_family == AF_INET6)
208 {
209 /*
210 * Save the connected port number...
211 */
212
213 con->http.hostaddr->ipv6.sin6_port = lis->address.ipv6.sin6_port;
214
215 /*
216 * Convert IPv4 over IPv6 addresses (::ffff:n.n.n.n) to IPv4 forms we
217 * can more easily use...
218 */
219
220 if (con->http.hostaddr->ipv6.sin6_addr.s6_addr32[0] == 0 &&
221 con->http.hostaddr->ipv6.sin6_addr.s6_addr32[1] == 0 &&
222 ntohl(con->http.hostaddr->ipv6.sin6_addr.s6_addr32[2]) == 0xffff)
223 con->http.hostaddr->ipv6.sin6_addr.s6_addr32[2] = 0;
224 }
225 else
226 #endif /* AF_INET6 */
227 if (lis->address.addr.sa_family == AF_INET)
228 con->http.hostaddr->ipv4.sin_port = lis->address.ipv4.sin_port;
229
230 /*
231 * Check the number of clients on the same address...
232 */
233
234 for (count = 0, tempcon = (cupsd_client_t *)cupsArrayFirst(Clients);
235 tempcon;
236 tempcon = (cupsd_client_t *)cupsArrayNext(Clients))
237 if (httpAddrEqual(tempcon->http.hostaddr, con->http.hostaddr))
238 {
239 count ++;
240 if (count >= MaxClientsPerHost)
241 break;
242 }
243
244 if (count >= MaxClientsPerHost)
245 {
246 if ((time(NULL) - last_dos) >= 60)
247 {
248 last_dos = time(NULL);
249 cupsdLogMessage(CUPSD_LOG_WARN,
250 "Possible DoS attack - more than %d clients connecting "
251 "from %s!",
252 MaxClientsPerHost,
253 httpAddrString(con->http.hostaddr, con->http.hostname,
254 sizeof(con->http.hostname)));
255 }
256
257 #ifdef WIN32
258 closesocket(con->http.fd);
259 #else
260 close(con->http.fd);
261 #endif /* WIN32 */
262
263 free(con);
264 return;
265 }
266
267 /*
268 * Get the hostname or format the IP address as needed...
269 */
270
271 if (httpAddrLocalhost(con->http.hostaddr))
272 {
273 /*
274 * Map accesses from the loopback interface to "localhost"...
275 */
276
277 strlcpy(con->http.hostname, "localhost", sizeof(con->http.hostname));
278 hostname = con->http.hostname;
279 }
280 else
281 {
282 /*
283 * Map accesses from the same host to the server name.
284 */
285
286 if (HostNameLookups)
287 hostname = httpAddrLookup(con->http.hostaddr, con->http.hostname,
288 sizeof(con->http.hostname));
289 else
290 {
291 hostname = NULL;
292 httpAddrString(con->http.hostaddr, con->http.hostname,
293 sizeof(con->http.hostname));
294 }
295 }
296
297 if (hostname == NULL && HostNameLookups == 2)
298 {
299 /*
300 * Can't have an unresolved IP address with double-lookups enabled...
301 */
302
303 #ifdef WIN32
304 closesocket(con->http.fd);
305 #else
306 close(con->http.fd);
307 #endif /* WIN32 */
308
309 cupsdLogMessage(CUPSD_LOG_WARN,
310 "Name lookup failed - connection from %s closed!",
311 con->http.hostname);
312
313 free(con);
314 return;
315 }
316
317 if (HostNameLookups == 2)
318 {
319 /*
320 * Do double lookups as needed...
321 */
322
323 if ((addrlist = httpAddrGetList(con->http.hostname, AF_UNSPEC, NULL))
324 != NULL)
325 {
326 /*
327 * See if the hostname maps to the same IP address...
328 */
329
330 for (addr = addrlist; addr; addr = addr->next)
331 if (httpAddrEqual(con->http.hostaddr, &(addr->addr)))
332 break;
333 }
334 else
335 addr = NULL;
336
337 httpAddrFreeList(addrlist);
338
339 if (!addr)
340 {
341 /*
342 * Can't have a hostname that doesn't resolve to the same IP address
343 * with double-lookups enabled...
344 */
345
346 #ifdef WIN32
347 closesocket(con->http.fd);
348 #else
349 close(con->http.fd);
350 #endif /* WIN32 */
351
352 cupsdLogMessage(CUPSD_LOG_WARN,
353 "IP lookup failed - connection from %s closed!",
354 con->http.hostname);
355 free(con);
356 return;
357 }
358 }
359
360 #ifdef HAVE_TCPD_H
361 /*
362 * See if the connection is denied by TCP wrappers...
363 */
364
365 request_init(&wrap_req, RQ_DAEMON, "cupsd", RQ_FILE, con->http.fd, NULL);
366 fromhost(&wrap_req);
367
368 if (!hosts_access(&wrap_req))
369 {
370 #ifdef WIN32
371 closesocket(con->http.fd);
372 #else
373 close(con->http.fd);
374 #endif /* WIN32 */
375
376 cupsdLogMessage(CUPSD_LOG_WARN,
377 "Connection from %s refused by /etc/hosts.allow and "
378 "/etc/hosts.deny rules.", con->http.hostname);
379 free(con);
380 return;
381 }
382 #endif /* HAVE_TCPD_H */
383
384 #ifdef AF_INET6
385 if (con->http.hostaddr->addr.sa_family == AF_INET6)
386 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s:%d (IPv6)",
387 con->http.fd, con->http.hostname,
388 ntohs(con->http.hostaddr->ipv6.sin6_port));
389 else
390 #endif /* AF_INET6 */
391 #ifdef AF_LOCAL
392 if (con->http.hostaddr->addr.sa_family == AF_LOCAL)
393 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s (Domain)",
394 con->http.fd, con->http.hostname);
395 else
396 #endif /* AF_LOCAL */
397 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s:%d (IPv4)",
398 con->http.fd, con->http.hostname,
399 ntohs(con->http.hostaddr->ipv4.sin_port));
400
401 /*
402 * Get the local address the client connected to...
403 */
404
405 addrlen = sizeof(temp);
406 if (getsockname(con->http.fd, (struct sockaddr *)&temp, &addrlen))
407 {
408 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to get local address - %s",
409 strerror(errno));
410
411 strcpy(con->servername, "localhost");
412 con->serverport = LocalPort;
413 }
414 else
415 {
416 #ifdef AF_INET6
417 if (temp.addr.sa_family == AF_INET6)
418 {
419 if (HostNameLookups)
420 httpAddrLookup(&temp, con->servername, sizeof(con->servername));
421 else if (httpAddrLocalhost(&temp))
422 strlcpy(con->servername, "localhost", sizeof(con->servername));
423 else
424 httpAddrString(&temp, con->servername, sizeof(con->servername));
425
426 con->serverport = ntohs(lis->address.ipv6.sin6_port);
427 }
428 else
429 #endif /* AF_INET6 */
430 if (temp.addr.sa_family == AF_INET)
431 {
432 if (HostNameLookups)
433 httpAddrLookup(&temp, con->servername, sizeof(con->servername));
434 else if (httpAddrLocalhost(&temp))
435 strlcpy(con->servername, "localhost", sizeof(con->servername));
436 else
437 httpAddrString(&temp, con->servername, sizeof(con->servername));
438
439 con->serverport = ntohs(lis->address.ipv4.sin_port);
440 }
441 else
442 {
443 strcpy(con->servername, "localhost");
444 con->serverport = LocalPort;
445 }
446 }
447
448 cupsArrayAdd(Clients, con);
449
450 /*
451 * Using TCP_NODELAY improves responsiveness, especially on systems with a slow
452 * loopback interface. Since we write large buffers when sending print files
453 * and requests there shouldn't be any performance penalty for this...
454 */
455
456 val = 1;
457 setsockopt(con->http.fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
458
459 /*
460 * Close this file on all execs...
461 */
462
463 fcntl(con->http.fd, F_SETFD, fcntl(con->http.fd, F_GETFD) | FD_CLOEXEC);
464
465 /*
466 * Add the socket to the server select.
467 */
468
469 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
470
471 /*
472 * Temporarily suspend accept()'s until we lose a client...
473 */
474
475 if (cupsArrayCount(Clients) == MaxClients)
476 cupsdPauseListening();
477
478 #ifdef HAVE_SSL
479 /*
480 * See if we are connecting on a secure port...
481 */
482
483 if (lis->encryption == HTTP_ENCRYPT_ALWAYS)
484 {
485 /*
486 * https connection; go secure...
487 */
488
489 con->http.encryption = HTTP_ENCRYPT_ALWAYS;
490
491 if (!encrypt_client(con))
492 cupsdCloseClient(con);
493 }
494 else
495 con->auto_ssl = 1;
496 #endif /* HAVE_SSL */
497 }
498
499
500 /*
501 * 'cupsdCloseAllClients()' - Close all remote clients immediately.
502 */
503
504 void
505 cupsdCloseAllClients(void)
506 {
507 cupsd_client_t *con; /* Current client */
508
509
510 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCloseAllClients() Clients=%d",
511 cupsArrayCount(Clients));
512
513 for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
514 con;
515 con = (cupsd_client_t *)cupsArrayNext(Clients))
516 if (cupsdCloseClient(con))
517 cupsdCloseClient(con);
518 }
519
520
521 /*
522 * 'cupsdCloseClient()' - Close a remote client.
523 */
524
525 int /* O - 1 if partial close, 0 if fully closed */
526 cupsdCloseClient(cupsd_client_t *con) /* I - Client to close */
527 {
528 int partial; /* Do partial close for SSL? */
529 #ifdef HAVE_LIBSSL
530 SSL_CTX *context; /* Context for encryption */
531 SSL *conn; /* Connection for encryption */
532 unsigned long error; /* Error code */
533 #elif defined(HAVE_GNUTLS)
534 http_tls_t *conn; /* TLS connection information */
535 int error; /* Error code */
536 gnutls_certificate_server_credentials *credentials;
537 /* TLS credentials */
538 # elif defined(HAVE_CDSASSL)
539 http_tls_t *conn; /* CDSA connection information */
540 #endif /* HAVE_LIBSSL */
541
542
543 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCloseClient(con=%p(%d))", con,
544 con->http.fd);
545
546 /*
547 * Flush pending writes before closing...
548 */
549
550 httpFlushWrite(HTTP(con));
551
552 partial = 0;
553
554 #ifdef HAVE_SSL
555 /*
556 * Shutdown encryption as needed...
557 */
558
559 if (con->http.tls)
560 {
561 partial = 1;
562
563 # ifdef HAVE_LIBSSL
564 conn = (SSL *)(con->http.tls);
565 context = SSL_get_SSL_CTX(conn);
566
567 switch (SSL_shutdown(conn))
568 {
569 case 1 :
570 cupsdLogMessage(CUPSD_LOG_DEBUG,
571 "SSL shutdown successful!");
572 break;
573 case -1 :
574 cupsdLogMessage(CUPSD_LOG_ERROR,
575 "Fatal error during SSL shutdown!");
576 default :
577 while ((error = ERR_get_error()) != 0)
578 cupsdLogMessage(CUPSD_LOG_ERROR, "SSL shutdown failed: %s",
579 ERR_error_string(error, NULL));
580 break;
581 }
582
583 SSL_CTX_free(context);
584 SSL_free(conn);
585
586 # elif defined(HAVE_GNUTLS)
587 conn = (http_tls_t *)(con->http.tls);
588 credentials = (gnutls_certificate_server_credentials *)(conn->credentials);
589
590 error = gnutls_bye(conn->session, GNUTLS_SHUT_WR);
591 switch (error)
592 {
593 case GNUTLS_E_SUCCESS:
594 cupsdLogMessage(CUPSD_LOG_DEBUG,
595 "SSL shutdown successful!");
596 break;
597 default:
598 cupsdLogMessage(CUPSD_LOG_ERROR,
599 "SSL shutdown failed: %s", gnutls_strerror(error));
600 break;
601 }
602
603 gnutls_deinit(conn->session);
604 gnutls_certificate_free_credentials(*credentials);
605 free(credentials);
606 free(conn);
607
608 # elif defined(HAVE_CDSASSL)
609 conn = (http_tls_t *)(con->http.tls);
610
611 while (SSLClose(conn->session) == errSSLWouldBlock)
612 usleep(1000);
613
614 SSLDisposeContext(conn->session);
615
616 if (conn->certsArray)
617 CFRelease(conn->certsArray);
618
619 free(conn);
620 # endif /* HAVE_LIBSSL */
621
622 con->http.tls = NULL;
623 }
624 #endif /* HAVE_SSL */
625
626 if (con->pipe_pid != 0)
627 {
628 /*
629 * Stop any CGI process...
630 */
631
632 cupsdEndProcess(con->pipe_pid, 1);
633 con->pipe_pid = 0;
634 }
635
636 if (con->file >= 0)
637 {
638 cupsdRemoveSelect(con->file);
639
640 close(con->file);
641 con->file = -1;
642 }
643
644 /*
645 * Close the socket and clear the file from the input set for select()...
646 */
647
648 if (con->http.fd >= 0)
649 {
650 cupsArrayRemove(ActiveClients, con);
651 cupsdSetBusyState();
652
653 if (partial)
654 {
655 /*
656 * Only do a partial close so that the encrypted client gets everything.
657 */
658
659 shutdown(con->http.fd, 0);
660 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
661 }
662 else
663 {
664 /*
665 * Shut the socket down fully...
666 */
667
668 cupsdRemoveSelect(con->http.fd);
669 close(con->http.fd);
670 con->http.fd = -1;
671 }
672 }
673
674 if (!partial)
675 {
676 /*
677 * Free memory...
678 */
679
680 if (con->http.input_set)
681 free(con->http.input_set);
682
683 httpClearCookie(HTTP(con));
684 httpClearFields(HTTP(con));
685
686 cupsdClearString(&con->filename);
687 cupsdClearString(&con->command);
688 cupsdClearString(&con->options);
689 cupsdClearString(&con->query_string);
690
691 if (con->request)
692 {
693 ippDelete(con->request);
694 con->request = NULL;
695 }
696
697 if (con->response)
698 {
699 ippDelete(con->response);
700 con->response = NULL;
701 }
702
703 if (con->language)
704 {
705 cupsLangFree(con->language);
706 con->language = NULL;
707 }
708
709 #ifdef HAVE_AUTHORIZATION_H
710 if (con->authref)
711 {
712 AuthorizationFree(con->authref, kAuthorizationFlagDefaults);
713 con->authref = NULL;
714 }
715 #endif /* HAVE_AUTHORIZATION_H */
716
717 /*
718 * Re-enable new client connections if we are going back under the
719 * limit...
720 */
721
722 if (cupsArrayCount(Clients) == MaxClients)
723 cupsdResumeListening();
724
725 /*
726 * Compact the list of clients as necessary...
727 */
728
729 cupsArrayRemove(Clients, con);
730
731 free(con);
732 }
733
734 return (partial);
735 }
736
737
738 /*
739 * 'cupsdFlushHeader()' - Flush the header fields to the client.
740 */
741
742 int /* I - Bytes written or -1 on error */
743 cupsdFlushHeader(cupsd_client_t *con) /* I - Client to flush to */
744 {
745 int bytes = httpFlushWrite(HTTP(con));
746
747 con->http.data_encoding = HTTP_ENCODE_LENGTH;
748
749 return (bytes);
750 }
751
752
753 /*
754 * 'cupsdReadClient()' - Read data from a client.
755 */
756
757 void
758 cupsdReadClient(cupsd_client_t *con) /* I - Client to read from */
759 {
760 char line[32768], /* Line from client... */
761 operation[64], /* Operation code from socket */
762 version[64], /* HTTP version number string */
763 locale[64], /* Locale */
764 *ptr; /* Pointer into strings */
765 int major, minor; /* HTTP version numbers */
766 http_status_t status; /* Transfer status */
767 ipp_state_t ipp_state; /* State of IPP transfer */
768 int bytes; /* Number of bytes to POST */
769 char *filename; /* Name of file for GET/HEAD */
770 char buf[1024]; /* Buffer for real filename */
771 struct stat filestats; /* File information */
772 mime_type_t *type; /* MIME type of file */
773 cupsd_printer_t *p; /* Printer */
774 static unsigned request_id = 0; /* Request ID for temp files */
775
776
777 status = HTTP_CONTINUE;
778
779 cupsdLogMessage(CUPSD_LOG_DEBUG2,
780 "cupsdReadClient(con=%p(%d)) "
781 "con->http.error=%d "
782 "con->http.used=%d, "
783 "con->http.state=%d "
784 "con->data_encoding=HTTP_ENCODE_%s, "
785 "con->data_remaining=" CUPS_LLFMT ", "
786 "con->file=%d",
787 con, con->http.fd, con->http.error, con->http.used,
788 con->http.state,
789 con->http.data_encoding == HTTP_ENCODE_CHUNKED ?
790 "CHUNKED" : "LENGTH",
791 CUPS_LLCAST con->http.data_remaining, con->file);
792
793 if (con->http.error)
794 {
795 cupsdCloseClient(con);
796 return;
797 }
798
799 #ifdef HAVE_SSL
800 if (con->auto_ssl)
801 {
802 /*
803 * Automatically check for a SSL/TLS handshake...
804 */
805
806 con->auto_ssl = 0;
807
808 if (recv(con->http.fd, buf, 1, MSG_PEEK) == 1 &&
809 (!buf[0] || !strchr("DGHOPT", buf[0])))
810 {
811 /*
812 * Encrypt this connection...
813 */
814
815 cupsdLogMessage(CUPSD_LOG_DEBUG2,
816 "cupsdReadClient: Saw first byte %02X, auto-negotiating "
817 "SSL/TLS session...", buf[0] & 255);
818
819 if (!encrypt_client(con))
820 cupsdCloseClient(con);
821
822 return;
823 }
824 }
825 #endif /* HAVE_SSL */
826
827 switch (con->http.state)
828 {
829 case HTTP_WAITING :
830 /*
831 * See if we've received a request line...
832 */
833
834 if (httpGets(line, sizeof(line) - 1, HTTP(con)) == NULL)
835 {
836 cupsdCloseClient(con);
837 return;
838 }
839
840 /*
841 * Ignore blank request lines...
842 */
843
844 if (line[0] == '\0')
845 break;
846
847 /*
848 * Clear other state variables...
849 */
850
851 httpClearFields(HTTP(con));
852
853 con->http.activity = time(NULL);
854 con->http.version = HTTP_1_0;
855 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
856 con->http.data_encoding = HTTP_ENCODE_LENGTH;
857 con->http.data_remaining = 0;
858 con->http._data_remaining = 0;
859 con->operation = HTTP_WAITING;
860 con->bytes = 0;
861 con->file = -1;
862 con->file_ready = 0;
863 con->pipe_pid = 0;
864 con->username[0] = '\0';
865 con->password[0] = '\0';
866 con->uri[0] = '\0';
867
868 cupsdClearString(&con->command);
869 cupsdClearString(&con->options);
870 cupsdClearString(&con->query_string);
871
872 if (con->request)
873 {
874 ippDelete(con->request);
875 con->request = NULL;
876 }
877
878 if (con->response)
879 {
880 ippDelete(con->response);
881 con->response = NULL;
882 }
883
884 if (con->language)
885 {
886 cupsLangFree(con->language);
887 con->language = NULL;
888 }
889
890 #ifdef HAVE_GSSAPI
891 con->gss_have_creds = 0;
892 #endif /* HAVE_GSSAPI */
893
894 /*
895 * Grab the request line...
896 */
897
898 switch (sscanf(line, "%63s%1023s%63s", operation, con->uri, version))
899 {
900 case 1 :
901 if (line[0])
902 {
903 cupsdLogMessage(CUPSD_LOG_ERROR,
904 "Bad request line \"%s\" from %s!", line,
905 con->http.hostname);
906 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
907 cupsdCloseClient(con);
908 }
909 return;
910 case 2 :
911 con->http.version = HTTP_0_9;
912 break;
913 case 3 :
914 if (sscanf(version, "HTTP/%d.%d", &major, &minor) != 2)
915 {
916 cupsdLogMessage(CUPSD_LOG_ERROR,
917 "Bad request line \"%s\" from %s!", line,
918 con->http.hostname);
919 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
920 cupsdCloseClient(con);
921 return;
922 }
923
924 if (major < 2)
925 {
926 con->http.version = (http_version_t)(major * 100 + minor);
927 if (con->http.version == HTTP_1_1 && KeepAlive)
928 con->http.keep_alive = HTTP_KEEPALIVE_ON;
929 else
930 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
931 }
932 else
933 {
934 cupsdSendError(con, HTTP_NOT_SUPPORTED, CUPSD_AUTH_NONE);
935 cupsdCloseClient(con);
936 return;
937 }
938 break;
939 }
940
941 /*
942 * Handle full URLs in the request line...
943 */
944
945 if (strcmp(con->uri, "*"))
946 {
947 char scheme[HTTP_MAX_URI], /* Method/scheme */
948 userpass[HTTP_MAX_URI], /* Username:password */
949 hostname[HTTP_MAX_URI], /* Hostname */
950 resource[HTTP_MAX_URI]; /* Resource path */
951 int port; /* Port number */
952
953
954 /*
955 * Separate the URI into its components...
956 */
957
958 httpSeparateURI(HTTP_URI_CODING_MOST, con->uri,
959 scheme, sizeof(scheme),
960 userpass, sizeof(userpass),
961 hostname, sizeof(hostname), &port,
962 resource, sizeof(resource));
963
964 /*
965 * Only allow URIs with the servername, localhost, or an IP
966 * address...
967 */
968
969 if (strcmp(scheme, "file") &&
970 strcasecmp(hostname, ServerName) &&
971 strcasecmp(hostname, "localhost") &&
972 !isdigit(hostname[0]) && hostname[0] != '[')
973 {
974 /*
975 * Nope, we don't do proxies...
976 */
977
978 cupsdLogMessage(CUPSD_LOG_ERROR, "Bad URI \"%s\" in request!",
979 con->uri);
980 cupsdSendError(con, HTTP_METHOD_NOT_ALLOWED, CUPSD_AUTH_NONE);
981 cupsdCloseClient(con);
982 return;
983 }
984
985 /*
986 * Copy the resource portion back into the URI; both resource and
987 * con->uri are HTTP_MAX_URI bytes in size...
988 */
989
990 strcpy(con->uri, resource);
991 }
992
993 /*
994 * Process the request...
995 */
996
997 if (!strcmp(operation, "GET"))
998 con->http.state = HTTP_GET;
999 else if (!strcmp(operation, "PUT"))
1000 con->http.state = HTTP_PUT;
1001 else if (!strcmp(operation, "POST"))
1002 con->http.state = HTTP_POST;
1003 else if (!strcmp(operation, "DELETE"))
1004 con->http.state = HTTP_DELETE;
1005 else if (!strcmp(operation, "TRACE"))
1006 con->http.state = HTTP_TRACE;
1007 else if (!strcmp(operation, "OPTIONS"))
1008 con->http.state = HTTP_OPTIONS;
1009 else if (!strcmp(operation, "HEAD"))
1010 con->http.state = HTTP_HEAD;
1011 else
1012 {
1013 cupsdLogMessage(CUPSD_LOG_ERROR, "Bad operation \"%s\"!", operation);
1014 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
1015 cupsdCloseClient(con);
1016 return;
1017 }
1018
1019 gettimeofday(&(con->start), NULL);
1020 con->operation = con->http.state;
1021
1022 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdReadClient: %d %s %s HTTP/%d.%d",
1023 con->http.fd, operation, con->uri,
1024 con->http.version / 100, con->http.version % 100);
1025
1026 con->http.status = HTTP_OK;
1027
1028 if (!cupsArrayFind(ActiveClients, con))
1029 {
1030 cupsArrayAdd(ActiveClients, con);
1031 cupsdSetBusyState();
1032 }
1033
1034 case HTTP_OPTIONS :
1035 case HTTP_DELETE :
1036 case HTTP_GET :
1037 case HTTP_HEAD :
1038 case HTTP_POST :
1039 case HTTP_PUT :
1040 case HTTP_TRACE :
1041 /*
1042 * Parse incoming parameters until the status changes...
1043 */
1044
1045 while ((status = httpUpdate(HTTP(con))) == HTTP_CONTINUE)
1046 if (!data_ready(con))
1047 break;
1048
1049 if (status != HTTP_OK && status != HTTP_CONTINUE)
1050 {
1051 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
1052 cupsdCloseClient(con);
1053 return;
1054 }
1055 break;
1056
1057 default :
1058 if (!data_ready(con) && recv(con->http.fd, buf, 1, MSG_PEEK) < 1)
1059 {
1060 /*
1061 * Connection closed...
1062 */
1063
1064 cupsdCloseClient(con);
1065 return;
1066 }
1067 break; /* Anti-compiler-warning-code */
1068 }
1069
1070 /*
1071 * Handle new transfers...
1072 */
1073
1074 if (status == HTTP_OK)
1075 {
1076 if (con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE][0])
1077 {
1078 /*
1079 * Figure out the locale from the Accept-Language and Content-Type
1080 * fields...
1081 */
1082
1083 if ((ptr = strchr(con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], ',')) != NULL)
1084 *ptr = '\0';
1085
1086 if ((ptr = strchr(con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], ';')) != NULL)
1087 *ptr = '\0';
1088
1089 if ((ptr = strstr(con->http.fields[HTTP_FIELD_CONTENT_TYPE], "charset=")) != NULL)
1090 {
1091 /*
1092 * Combine language and charset, and trim any extra params in the
1093 * content-type.
1094 */
1095
1096 snprintf(locale, sizeof(locale), "%s.%s",
1097 con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], ptr + 8);
1098
1099 if ((ptr = strchr(locale, ',')) != NULL)
1100 *ptr = '\0';
1101 }
1102 else
1103 snprintf(locale, sizeof(locale), "%s.%s",
1104 con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], DefaultCharset);
1105
1106 con->language = cupsLangGet(locale);
1107 }
1108 else
1109 con->language = cupsLangGet(DefaultLocale);
1110
1111 cupsdAuthorize(con);
1112
1113 if (!strncasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Keep-Alive", 10) &&
1114 KeepAlive)
1115 con->http.keep_alive = HTTP_KEEPALIVE_ON;
1116 else if (!strncasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "close", 5))
1117 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1118
1119 if (!con->http.fields[HTTP_FIELD_HOST][0] &&
1120 con->http.version >= HTTP_1_1)
1121 {
1122 /*
1123 * HTTP/1.1 and higher require the "Host:" field...
1124 */
1125
1126 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1127 {
1128 cupsdCloseClient(con);
1129 return;
1130 }
1131 }
1132 else if (httpAddrLocalhost(con->http.hostaddr) &&
1133 strcasecmp(con->http.fields[HTTP_FIELD_HOST], "localhost") &&
1134 strncasecmp(con->http.fields[HTTP_FIELD_HOST], "localhost:", 10) &&
1135 strcmp(con->http.fields[HTTP_FIELD_HOST], "127.0.0.1") &&
1136 strncmp(con->http.fields[HTTP_FIELD_HOST], "127.0.0.1:", 10) &&
1137 strcmp(con->http.fields[HTTP_FIELD_HOST], "[::1]") &&
1138 strncmp(con->http.fields[HTTP_FIELD_HOST], "[::1]:", 6))
1139 {
1140 /*
1141 * Access to localhost must use "localhost" or the corresponding IPv4
1142 * or IPv6 values in the Host: field.
1143 */
1144
1145 cupsdLogMessage(CUPSD_LOG_WARN,
1146 "Request from \"%s\" using invalid Host: field \"%s\"",
1147 con->http.hostname, con->http.fields[HTTP_FIELD_HOST]);
1148
1149 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1150 {
1151 cupsdCloseClient(con);
1152 return;
1153 }
1154 }
1155 else if (con->operation == HTTP_OPTIONS)
1156 {
1157 /*
1158 * Do OPTIONS command...
1159 */
1160
1161 if (con->best && con->best->type != CUPSD_AUTH_NONE)
1162 {
1163 if (!cupsdSendHeader(con, HTTP_UNAUTHORIZED, NULL, CUPSD_AUTH_NONE))
1164 {
1165 cupsdCloseClient(con);
1166 return;
1167 }
1168 }
1169
1170 if (!strcasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Upgrade") &&
1171 con->http.tls == NULL)
1172 {
1173 #ifdef HAVE_SSL
1174 /*
1175 * Do encryption stuff...
1176 */
1177
1178 if (!cupsdSendHeader(con, HTTP_SWITCHING_PROTOCOLS, NULL, CUPSD_AUTH_NONE))
1179 {
1180 cupsdCloseClient(con);
1181 return;
1182 }
1183
1184 httpPrintf(HTTP(con), "Connection: Upgrade\r\n");
1185 httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n");
1186 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1187 httpPrintf(HTTP(con), "\r\n");
1188
1189 if (cupsdFlushHeader(con) < 0)
1190 {
1191 cupsdCloseClient(con);
1192 return;
1193 }
1194
1195 if (!encrypt_client(con))
1196 {
1197 cupsdCloseClient(con);
1198 return;
1199 }
1200 #else
1201 if (!cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE))
1202 {
1203 cupsdCloseClient(con);
1204 return;
1205 }
1206 #endif /* HAVE_SSL */
1207 }
1208
1209 if (!cupsdSendHeader(con, HTTP_OK, NULL, CUPSD_AUTH_NONE))
1210 {
1211 cupsdCloseClient(con);
1212 return;
1213 }
1214
1215 httpPrintf(HTTP(con), "Allow: GET, HEAD, OPTIONS, POST, PUT\r\n");
1216 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1217 httpPrintf(HTTP(con), "\r\n");
1218
1219 if (cupsdFlushHeader(con) < 0)
1220 {
1221 cupsdCloseClient(con);
1222 return;
1223 }
1224 }
1225 else if (!is_path_absolute(con->uri))
1226 {
1227 /*
1228 * Protect against malicious users!
1229 */
1230
1231 cupsdLogMessage(CUPSD_LOG_ERROR,
1232 "Request for non-absolute resource \"%s\"!", con->uri);
1233
1234 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1235 {
1236 cupsdCloseClient(con);
1237 return;
1238 }
1239 }
1240 else
1241 {
1242 if (!strcasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Upgrade") &&
1243 con->http.tls == NULL)
1244 {
1245 #ifdef HAVE_SSL
1246 /*
1247 * Do encryption stuff...
1248 */
1249
1250 if (!cupsdSendHeader(con, HTTP_SWITCHING_PROTOCOLS, NULL, CUPSD_AUTH_NONE))
1251 {
1252 cupsdCloseClient(con);
1253 return;
1254 }
1255
1256 httpPrintf(HTTP(con), "Connection: Upgrade\r\n");
1257 httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n");
1258 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1259 httpPrintf(HTTP(con), "\r\n");
1260
1261 if (cupsdFlushHeader(con) < 0)
1262 {
1263 cupsdCloseClient(con);
1264 return;
1265 }
1266
1267 if (!encrypt_client(con))
1268 {
1269 cupsdCloseClient(con);
1270 return;
1271 }
1272 #else
1273 if (!cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE))
1274 {
1275 cupsdCloseClient(con);
1276 return;
1277 }
1278 #endif /* HAVE_SSL */
1279 }
1280
1281 if ((status = cupsdIsAuthorized(con, NULL)) != HTTP_OK)
1282 {
1283 cupsdSendError(con, status, CUPSD_AUTH_NONE);
1284 cupsdCloseClient(con);
1285 return;
1286 }
1287
1288 if (con->http.expect &&
1289 (con->operation == HTTP_POST || con->operation == HTTP_PUT))
1290 {
1291 if (con->http.expect == HTTP_CONTINUE)
1292 {
1293 /*
1294 * Send 100-continue header...
1295 */
1296
1297 if (!cupsdSendHeader(con, HTTP_CONTINUE, NULL, CUPSD_AUTH_NONE))
1298 {
1299 cupsdCloseClient(con);
1300 return;
1301 }
1302 }
1303 else
1304 {
1305 /*
1306 * Send 417-expectation-failed header...
1307 */
1308
1309 if (!cupsdSendHeader(con, HTTP_EXPECTATION_FAILED, NULL, CUPSD_AUTH_NONE))
1310 {
1311 cupsdCloseClient(con);
1312 return;
1313 }
1314
1315 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1316 httpPrintf(HTTP(con), "\r\n");
1317
1318 if (cupsdFlushHeader(con) < 0)
1319 {
1320 cupsdCloseClient(con);
1321 return;
1322 }
1323 }
1324 }
1325
1326 switch (con->http.state)
1327 {
1328 case HTTP_GET_SEND :
1329 if (!strncmp(con->uri, "/printers/", 10) &&
1330 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1331 {
1332 /*
1333 * Send PPD file - get the real printer name since printer
1334 * names are not case sensitive but filenames can be...
1335 */
1336
1337 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1338
1339 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1340 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1341 else
1342 {
1343 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1344 {
1345 cupsdCloseClient(con);
1346 return;
1347 }
1348
1349 break;
1350 }
1351 }
1352
1353 if ((!strncmp(con->uri, "/admin", 6) &&
1354 strncmp(con->uri, "/admin/conf/", 12) &&
1355 strncmp(con->uri, "/admin/log/", 11)) ||
1356 !strncmp(con->uri, "/printers", 9) ||
1357 !strncmp(con->uri, "/classes", 8) ||
1358 !strncmp(con->uri, "/help", 5) ||
1359 !strncmp(con->uri, "/jobs", 5))
1360 {
1361 /*
1362 * Send CGI output...
1363 */
1364
1365 if (!strncmp(con->uri, "/admin", 6))
1366 {
1367 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1368 ServerBin);
1369
1370 cupsdSetString(&con->options, strchr(con->uri + 6, '?'));
1371 }
1372 else if (!strncmp(con->uri, "/printers", 9))
1373 {
1374 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1375 ServerBin);
1376
1377 if (con->uri[9] && con->uri[10])
1378 cupsdSetString(&con->options, con->uri + 9);
1379 else
1380 cupsdSetString(&con->options, NULL);
1381 }
1382 else if (!strncmp(con->uri, "/classes", 8))
1383 {
1384 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1385 ServerBin);
1386
1387 if (con->uri[8] && con->uri[9])
1388 cupsdSetString(&con->options, con->uri + 8);
1389 else
1390 cupsdSetString(&con->options, NULL);
1391 }
1392 else if (!strncmp(con->uri, "/jobs", 5))
1393 {
1394 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1395 ServerBin);
1396
1397 if (con->uri[5] && con->uri[6])
1398 cupsdSetString(&con->options, con->uri + 5);
1399 else
1400 cupsdSetString(&con->options, NULL);
1401 }
1402 else
1403 {
1404 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1405 ServerBin);
1406
1407 if (con->uri[5] && con->uri[6])
1408 cupsdSetString(&con->options, con->uri + 5);
1409 else
1410 cupsdSetString(&con->options, NULL);
1411 }
1412
1413 if (!cupsdSendCommand(con, con->command, con->options, 0))
1414 {
1415 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1416 {
1417 cupsdCloseClient(con);
1418 return;
1419 }
1420 }
1421 else
1422 cupsdLogRequest(con, HTTP_OK);
1423
1424 if (con->http.version <= HTTP_1_0)
1425 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1426 }
1427 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1428 (strchr(con->uri + 12, '/') ||
1429 strlen(con->uri) == 12)) ||
1430 (!strncmp(con->uri, "/admin/log/", 11) &&
1431 (strchr(con->uri + 11, '/') ||
1432 strlen(con->uri) == 11)))
1433 {
1434 /*
1435 * GET can only be done to configuration files directly under
1436 * /admin/conf...
1437 */
1438
1439 cupsdLogMessage(CUPSD_LOG_ERROR,
1440 "Request for subdirectory \"%s\"!", con->uri);
1441
1442 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1443 {
1444 cupsdCloseClient(con);
1445 return;
1446 }
1447
1448 break;
1449 }
1450 else
1451 {
1452 /*
1453 * Serve a file...
1454 */
1455
1456 if ((filename = get_file(con, &filestats, buf,
1457 sizeof(buf))) == NULL)
1458 {
1459 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1460 {
1461 cupsdCloseClient(con);
1462 return;
1463 }
1464
1465 break;
1466 }
1467
1468 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1469
1470 if (is_cgi(con, filename, &filestats, type))
1471 {
1472 /*
1473 * Note: con->command and con->options were set by
1474 * is_cgi()...
1475 */
1476
1477 if (!cupsdSendCommand(con, con->command, con->options, 0))
1478 {
1479 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1480 {
1481 cupsdCloseClient(con);
1482 return;
1483 }
1484 }
1485 else
1486 cupsdLogRequest(con, HTTP_OK);
1487
1488 if (con->http.version <= HTTP_1_0)
1489 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1490 break;
1491 }
1492
1493 if (!check_if_modified(con, &filestats))
1494 {
1495 if (!cupsdSendError(con, HTTP_NOT_MODIFIED, CUPSD_AUTH_NONE))
1496 {
1497 cupsdCloseClient(con);
1498 return;
1499 }
1500 }
1501 else
1502 {
1503 if (type == NULL)
1504 strcpy(line, "text/plain");
1505 else
1506 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
1507
1508 if (!write_file(con, HTTP_OK, filename, line, &filestats))
1509 {
1510 cupsdCloseClient(con);
1511 return;
1512 }
1513 }
1514 }
1515 break;
1516
1517 case HTTP_POST_RECV :
1518 /*
1519 * See if the POST request includes a Content-Length field, and if
1520 * so check the length against any limits that are set...
1521 */
1522
1523 if (con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1524 MaxRequestSize > 0 &&
1525 con->http.data_remaining > MaxRequestSize)
1526 {
1527 /*
1528 * Request too large...
1529 */
1530
1531 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1532 {
1533 cupsdCloseClient(con);
1534 return;
1535 }
1536
1537 break;
1538 }
1539 else if (con->http.data_remaining < 0 ||
1540 (!con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1541 con->http.data_encoding == HTTP_ENCODE_LENGTH))
1542 {
1543 /*
1544 * Negative content lengths are invalid!
1545 */
1546
1547 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1548 {
1549 cupsdCloseClient(con);
1550 return;
1551 }
1552
1553 break;
1554 }
1555
1556 /*
1557 * See what kind of POST request this is; for IPP requests the
1558 * content-type field will be "application/ipp"...
1559 */
1560
1561 if (!strcmp(con->http.fields[HTTP_FIELD_CONTENT_TYPE],
1562 "application/ipp"))
1563 con->request = ippNew();
1564 else if ((!strncmp(con->uri, "/admin", 6) &&
1565 strncmp(con->uri, "/admin/conf/", 12) &&
1566 strncmp(con->uri, "/admin/log/", 11)) ||
1567 !strncmp(con->uri, "/printers", 9) ||
1568 !strncmp(con->uri, "/classes", 8) ||
1569 !strncmp(con->uri, "/help", 5) ||
1570 !strncmp(con->uri, "/jobs", 5))
1571 {
1572 /*
1573 * CGI request...
1574 */
1575
1576 if (!strncmp(con->uri, "/admin", 6))
1577 {
1578 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1579 ServerBin);
1580
1581 cupsdSetString(&con->options, strchr(con->uri + 6, '?'));
1582 }
1583 else if (!strncmp(con->uri, "/printers", 9))
1584 {
1585 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1586 ServerBin);
1587
1588 if (con->uri[9] && con->uri[10])
1589 cupsdSetString(&con->options, con->uri + 9);
1590 else
1591 cupsdSetString(&con->options, NULL);
1592 }
1593 else if (!strncmp(con->uri, "/classes", 8))
1594 {
1595 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1596 ServerBin);
1597
1598 if (con->uri[8] && con->uri[9])
1599 cupsdSetString(&con->options, con->uri + 8);
1600 else
1601 cupsdSetString(&con->options, NULL);
1602 }
1603 else if (!strncmp(con->uri, "/jobs", 5))
1604 {
1605 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1606 ServerBin);
1607
1608 if (con->uri[5] && con->uri[6])
1609 cupsdSetString(&con->options, con->uri + 5);
1610 else
1611 cupsdSetString(&con->options, NULL);
1612 }
1613 else
1614 {
1615 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1616 ServerBin);
1617
1618 if (con->uri[5] && con->uri[6])
1619 cupsdSetString(&con->options, con->uri + 5);
1620 else
1621 cupsdSetString(&con->options, NULL);
1622 }
1623
1624 if (con->http.version <= HTTP_1_0)
1625 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1626 }
1627 else
1628 {
1629 /*
1630 * POST to a file...
1631 */
1632
1633 if ((filename = get_file(con, &filestats, buf,
1634 sizeof(buf))) == NULL)
1635 {
1636 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1637 {
1638 cupsdCloseClient(con);
1639 return;
1640 }
1641
1642 break;
1643 }
1644
1645 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1646
1647 if (!is_cgi(con, filename, &filestats, type))
1648 {
1649 /*
1650 * Only POST to CGI's...
1651 */
1652
1653 if (!cupsdSendError(con, HTTP_UNAUTHORIZED, CUPSD_AUTH_NONE))
1654 {
1655 cupsdCloseClient(con);
1656 return;
1657 }
1658 }
1659 }
1660 break;
1661
1662 case HTTP_PUT_RECV :
1663 /*
1664 * Validate the resource name...
1665 */
1666
1667 if (strncmp(con->uri, "/admin/conf/", 12) ||
1668 strchr(con->uri + 12, '/') ||
1669 strlen(con->uri) == 12)
1670 {
1671 /*
1672 * PUT can only be done to configuration files under
1673 * /admin/conf...
1674 */
1675
1676 cupsdLogMessage(CUPSD_LOG_ERROR,
1677 "Request for subdirectory \"%s\"!", con->uri);
1678
1679 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1680 {
1681 cupsdCloseClient(con);
1682 return;
1683 }
1684
1685 break;
1686 }
1687
1688 /*
1689 * See if the PUT request includes a Content-Length field, and if
1690 * so check the length against any limits that are set...
1691 */
1692
1693 if (con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1694 MaxRequestSize > 0 &&
1695 con->http.data_remaining > MaxRequestSize)
1696 {
1697 /*
1698 * Request too large...
1699 */
1700
1701 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1702 {
1703 cupsdCloseClient(con);
1704 return;
1705 }
1706
1707 break;
1708 }
1709 else if (con->http.data_remaining < 0)
1710 {
1711 /*
1712 * Negative content lengths are invalid!
1713 */
1714
1715 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1716 {
1717 cupsdCloseClient(con);
1718 return;
1719 }
1720
1721 break;
1722 }
1723
1724 /*
1725 * Open a temporary file to hold the request...
1726 */
1727
1728 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot,
1729 request_id ++);
1730 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
1731
1732 if (con->file < 0)
1733 {
1734 cupsdLogMessage(CUPSD_LOG_ERROR,
1735 "Unable to create request file %s: %s",
1736 con->filename, strerror(errno));
1737
1738 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1739 {
1740 cupsdCloseClient(con);
1741 return;
1742 }
1743 }
1744
1745 fchmod(con->file, 0640);
1746 fchown(con->file, RunUser, Group);
1747 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
1748 break;
1749
1750 case HTTP_DELETE :
1751 case HTTP_TRACE :
1752 cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE);
1753 cupsdCloseClient(con);
1754 return;
1755
1756 case HTTP_HEAD :
1757 if (!strncmp(con->uri, "/printers/", 10) &&
1758 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1759 {
1760 /*
1761 * Send PPD file - get the real printer name since printer
1762 * names are not case sensitive but filenames can be...
1763 */
1764
1765 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1766
1767 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1768 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1769 else
1770 {
1771 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1772 {
1773 cupsdCloseClient(con);
1774 return;
1775 }
1776
1777 break;
1778 }
1779 }
1780
1781 if ((!strncmp(con->uri, "/admin", 6) &&
1782 strncmp(con->uri, "/admin/conf/", 12) &&
1783 strncmp(con->uri, "/admin/log/", 11)) ||
1784 !strncmp(con->uri, "/printers", 9) ||
1785 !strncmp(con->uri, "/classes", 8) ||
1786 !strncmp(con->uri, "/help", 5) ||
1787 !strncmp(con->uri, "/jobs", 5))
1788 {
1789 /*
1790 * CGI output...
1791 */
1792
1793 if (!cupsdSendHeader(con, HTTP_OK, "text/html", CUPSD_AUTH_NONE))
1794 {
1795 cupsdCloseClient(con);
1796 return;
1797 }
1798
1799 if (httpPrintf(HTTP(con), "\r\n") < 0)
1800 {
1801 cupsdCloseClient(con);
1802 return;
1803 }
1804
1805 if (cupsdFlushHeader(con) < 0)
1806 {
1807 cupsdCloseClient(con);
1808 return;
1809 }
1810
1811 cupsdLogRequest(con, HTTP_OK);
1812 }
1813 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1814 (strchr(con->uri + 12, '/') ||
1815 strlen(con->uri) == 12)) ||
1816 (!strncmp(con->uri, "/admin/log/", 11) &&
1817 (strchr(con->uri + 11, '/') ||
1818 strlen(con->uri) == 11)))
1819 {
1820 /*
1821 * HEAD can only be done to configuration files under
1822 * /admin/conf...
1823 */
1824
1825 cupsdLogMessage(CUPSD_LOG_ERROR,
1826 "Request for subdirectory \"%s\"!", con->uri);
1827
1828 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1829 {
1830 cupsdCloseClient(con);
1831 return;
1832 }
1833
1834 break;
1835 }
1836 else if ((filename = get_file(con, &filestats, buf,
1837 sizeof(buf))) == NULL)
1838 {
1839 if (!cupsdSendHeader(con, HTTP_NOT_FOUND, "text/html", CUPSD_AUTH_NONE))
1840 {
1841 cupsdCloseClient(con);
1842 return;
1843 }
1844
1845 cupsdLogRequest(con, HTTP_NOT_FOUND);
1846 }
1847 else if (!check_if_modified(con, &filestats))
1848 {
1849 if (!cupsdSendError(con, HTTP_NOT_MODIFIED, CUPSD_AUTH_NONE))
1850 {
1851 cupsdCloseClient(con);
1852 return;
1853 }
1854
1855 cupsdLogRequest(con, HTTP_NOT_MODIFIED);
1856 }
1857 else
1858 {
1859 /*
1860 * Serve a file...
1861 */
1862
1863 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1864 if (type == NULL)
1865 strcpy(line, "text/plain");
1866 else
1867 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
1868
1869 if (!cupsdSendHeader(con, HTTP_OK, line, CUPSD_AUTH_NONE))
1870 {
1871 cupsdCloseClient(con);
1872 return;
1873 }
1874
1875 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
1876 httpGetDateString(filestats.st_mtime)) < 0)
1877 {
1878 cupsdCloseClient(con);
1879 return;
1880 }
1881
1882 if (httpPrintf(HTTP(con), "Content-Length: %lu\r\n",
1883 (unsigned long)filestats.st_size) < 0)
1884 {
1885 cupsdCloseClient(con);
1886 return;
1887 }
1888
1889 cupsdLogRequest(con, HTTP_OK);
1890 }
1891
1892 if (httpPrintf(HTTP(con), "\r\n") < 0)
1893 {
1894 cupsdCloseClient(con);
1895 return;
1896 }
1897
1898 if (cupsdFlushHeader(con) < 0)
1899 {
1900 cupsdCloseClient(con);
1901 return;
1902 }
1903
1904 con->http.state = HTTP_WAITING;
1905 break;
1906
1907 default :
1908 break; /* Anti-compiler-warning-code */
1909 }
1910 }
1911 }
1912
1913 /*
1914 * Handle any incoming data...
1915 */
1916
1917 switch (con->http.state)
1918 {
1919 case HTTP_PUT_RECV :
1920 do
1921 {
1922 if ((bytes = httpRead2(HTTP(con), line, sizeof(line))) < 0)
1923 {
1924 cupsdCloseClient(con);
1925 return;
1926 }
1927 else if (bytes > 0)
1928 {
1929 con->bytes += bytes;
1930
1931 if (write(con->file, line, bytes) < bytes)
1932 {
1933 cupsdLogMessage(CUPSD_LOG_ERROR,
1934 "cupsdReadClient: Unable to write %d bytes to %s: %s",
1935 bytes, con->filename, strerror(errno));
1936
1937 close(con->file);
1938 con->file = -1;
1939 unlink(con->filename);
1940 cupsdClearString(&con->filename);
1941
1942 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1943 {
1944 cupsdCloseClient(con);
1945 return;
1946 }
1947 }
1948 }
1949 }
1950 while (con->http.state == HTTP_PUT_RECV && data_ready(con));
1951
1952 if (con->http.state == HTTP_WAITING)
1953 {
1954 /*
1955 * End of file, see how big it is...
1956 */
1957
1958 fstat(con->file, &filestats);
1959
1960 close(con->file);
1961 con->file = -1;
1962
1963 if (filestats.st_size > MaxRequestSize &&
1964 MaxRequestSize > 0)
1965 {
1966 /*
1967 * Request is too big; remove it and send an error...
1968 */
1969
1970 unlink(con->filename);
1971 cupsdClearString(&con->filename);
1972
1973 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1974 {
1975 cupsdCloseClient(con);
1976 return;
1977 }
1978 }
1979
1980 /*
1981 * Install the configuration file...
1982 */
1983
1984 status = install_conf_file(con);
1985
1986 /*
1987 * Return the status to the client...
1988 */
1989
1990 if (!cupsdSendError(con, status, CUPSD_AUTH_NONE))
1991 {
1992 cupsdCloseClient(con);
1993 return;
1994 }
1995 }
1996 break;
1997
1998 case HTTP_POST_RECV :
1999 do
2000 {
2001 if (con->request)
2002 {
2003 /*
2004 * Grab any request data from the connection...
2005 */
2006
2007 if ((ipp_state = ippRead(&(con->http), con->request)) == IPP_ERROR)
2008 {
2009 cupsdLogMessage(CUPSD_LOG_ERROR,
2010 "cupsdReadClient: %d IPP Read Error!",
2011 con->http.fd);
2012
2013 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
2014 cupsdCloseClient(con);
2015 return;
2016 }
2017 else if (ipp_state != IPP_DATA)
2018 {
2019 if (con->http.state == HTTP_POST_SEND)
2020 {
2021 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
2022 cupsdCloseClient(con);
2023 return;
2024 }
2025
2026 break;
2027 }
2028 else
2029 con->bytes += ippLength(con->request);
2030 }
2031
2032 if (con->file < 0 && con->http.state != HTTP_POST_SEND)
2033 {
2034 /*
2035 * Create a file as needed for the request data...
2036 */
2037
2038 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot, request_id ++);
2039 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
2040
2041 if (con->file < 0)
2042 {
2043 cupsdLogMessage(CUPSD_LOG_ERROR,
2044 "Unable to create request file %s: %s",
2045 con->filename, strerror(errno));
2046
2047 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2048 {
2049 cupsdCloseClient(con);
2050 return;
2051 }
2052 }
2053
2054 fchmod(con->file, 0640);
2055 fchown(con->file, RunUser, Group);
2056 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
2057 }
2058
2059 if (con->http.state != HTTP_POST_SEND)
2060 {
2061 if ((bytes = httpRead2(HTTP(con), line, sizeof(line))) < 0)
2062 {
2063 cupsdCloseClient(con);
2064 return;
2065 }
2066 else if (bytes > 0)
2067 {
2068 con->bytes += bytes;
2069
2070 if (write(con->file, line, bytes) < bytes)
2071 {
2072 cupsdLogMessage(CUPSD_LOG_ERROR,
2073 "cupsdReadClient: Unable to write %d bytes to %s: %s",
2074 bytes, con->filename, strerror(errno));
2075
2076 close(con->file);
2077 con->file = -1;
2078 unlink(con->filename);
2079 cupsdClearString(&con->filename);
2080
2081 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2082 {
2083 cupsdCloseClient(con);
2084 return;
2085 }
2086 }
2087 }
2088 else if (con->http.state == HTTP_POST_RECV)
2089 return;
2090 else if (con->http.state != HTTP_POST_SEND)
2091 {
2092 cupsdCloseClient(con);
2093 return;
2094 }
2095 }
2096 }
2097 while (con->http.state == HTTP_POST_RECV && data_ready(con));
2098
2099 if (con->http.state == HTTP_POST_SEND)
2100 {
2101 if (con->file >= 0)
2102 {
2103 fstat(con->file, &filestats);
2104
2105 close(con->file);
2106 con->file = -1;
2107
2108 if (filestats.st_size > MaxRequestSize &&
2109 MaxRequestSize > 0)
2110 {
2111 /*
2112 * Request is too big; remove it and send an error...
2113 */
2114
2115 unlink(con->filename);
2116 cupsdClearString(&con->filename);
2117
2118 if (con->request)
2119 {
2120 /*
2121 * Delete any IPP request data...
2122 */
2123
2124 ippDelete(con->request);
2125 con->request = NULL;
2126 }
2127
2128 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2129 {
2130 cupsdCloseClient(con);
2131 return;
2132 }
2133 }
2134
2135 if (con->command)
2136 {
2137 if (!cupsdSendCommand(con, con->command, con->options, 0))
2138 {
2139 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
2140 {
2141 cupsdCloseClient(con);
2142 return;
2143 }
2144 }
2145 else
2146 cupsdLogRequest(con, HTTP_OK);
2147 }
2148 }
2149
2150 if (con->request)
2151 {
2152 cupsdProcessIPPRequest(con);
2153
2154 if (con->filename)
2155 {
2156 unlink(con->filename);
2157 cupsdClearString(&con->filename);
2158 }
2159
2160 return;
2161 }
2162 }
2163 break;
2164
2165 default :
2166 break; /* Anti-compiler-warning-code */
2167 }
2168
2169 if (con->http.state == HTTP_WAITING)
2170 {
2171 if (!con->http.keep_alive)
2172 cupsdCloseClient(con);
2173 else
2174 {
2175 cupsArrayRemove(ActiveClients, con);
2176 cupsdSetBusyState();
2177 }
2178 }
2179 }
2180
2181
2182 /*
2183 * 'cupsdSendCommand()' - Send output from a command via HTTP.
2184 */
2185
2186 int /* O - 1 on success, 0 on failure */
2187 cupsdSendCommand(
2188 cupsd_client_t *con, /* I - Client connection */
2189 char *command, /* I - Command to run */
2190 char *options, /* I - Command-line options */
2191 int root) /* I - Run as root? */
2192 {
2193 int fd; /* Standard input file descriptor */
2194
2195
2196 if (con->filename)
2197 {
2198 fd = open(con->filename, O_RDONLY);
2199
2200 if (fd < 0)
2201 {
2202 cupsdLogMessage(CUPSD_LOG_ERROR,
2203 "cupsdSendCommand: %d Unable to open \"%s\" for reading: %s",
2204 con->http.fd, con->filename ? con->filename : "/dev/null",
2205 strerror(errno));
2206 return (0);
2207 }
2208
2209 fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
2210 }
2211 else
2212 fd = -1;
2213
2214 con->pipe_pid = pipe_command(con, fd, &(con->file), command, options, root);
2215
2216 if (fd >= 0)
2217 close(fd);
2218
2219 cupsdLogMessage(CUPSD_LOG_INFO, "Started \"%s\" (pid=%d)", command,
2220 con->pipe_pid);
2221
2222 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdSendCommand: %d file=%d",
2223 con->http.fd, con->file);
2224
2225 if (con->pipe_pid == 0)
2226 return (0);
2227
2228 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
2229
2230 cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con);
2231
2232 con->sent_header = 0;
2233 con->file_ready = 0;
2234 con->got_fields = 0;
2235 con->field_col = 0;
2236
2237 return (1);
2238 }
2239
2240
2241 /*
2242 * 'cupsdSendError()' - Send an error message via HTTP.
2243 */
2244
2245 int /* O - 1 if successful, 0 otherwise */
2246 cupsdSendError(cupsd_client_t *con, /* I - Connection */
2247 http_status_t code, /* I - Error code */
2248 int auth_type)/* I - Authentication type */
2249 {
2250 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2251 "cupsdSendError(con=%p(%d), code=%d, auth_type=%d", con,
2252 con->http.fd, code, auth_type);
2253
2254 #ifdef HAVE_SSL
2255 /*
2256 * Force client to upgrade for authentication if that is how the
2257 * server is configured...
2258 */
2259
2260 if (code == HTTP_UNAUTHORIZED &&
2261 DefaultEncryption == HTTP_ENCRYPT_REQUIRED &&
2262 strcasecmp(con->http.hostname, "localhost") &&
2263 !con->http.tls)
2264 {
2265 code = HTTP_UPGRADE_REQUIRED;
2266 }
2267 #endif /* HAVE_SSL */
2268
2269 /*
2270 * Put the request in the access_log file...
2271 */
2272
2273 cupsdLogRequest(con, code);
2274
2275 /*
2276 * To work around bugs in some proxies, don't use Keep-Alive for some
2277 * error messages...
2278 *
2279 * Kerberos authentication doesn't work without Keep-Alive, so
2280 * never disable it in that case.
2281 */
2282
2283 if (code >= HTTP_BAD_REQUEST && con->http.auth_type != CUPSD_AUTH_NEGOTIATE)
2284 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
2285
2286 /*
2287 * Send an error message back to the client. If the error code is a
2288 * 400 or 500 series, make sure the message contains some text, too!
2289 */
2290
2291 if (!cupsdSendHeader(con, code, NULL, auth_type))
2292 return (0);
2293
2294 #ifdef HAVE_SSL
2295 if (code == HTTP_UPGRADE_REQUIRED)
2296 if (httpPrintf(HTTP(con), "Connection: Upgrade\r\n") < 0)
2297 return (0);
2298
2299 if (httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n") < 0)
2300 return (0);
2301 #endif /* HAVE_SSL */
2302
2303 if (con->http.version >= HTTP_1_1 &&
2304 con->http.keep_alive == HTTP_KEEPALIVE_OFF)
2305 {
2306 if (httpPrintf(HTTP(con), "Connection: close\r\n") < 0)
2307 return (0);
2308 }
2309
2310 if (code >= HTTP_BAD_REQUEST)
2311 {
2312 /*
2313 * Send a human-readable error message.
2314 */
2315
2316 char message[4096], /* Message for user */
2317 urltext[1024], /* URL redirection text */
2318 redirect[1024]; /* Redirection link */
2319 const char *text; /* Status-specific text */
2320
2321
2322 redirect[0] = '\0';
2323
2324 if (code == HTTP_UNAUTHORIZED)
2325 text = _cupsLangString(con->language,
2326 _("Enter your username and password or the "
2327 "root username and password to access this "
2328 "page. If you are using Kerberos authentication, "
2329 "make sure you have a valid Kerberos ticket."));
2330 else if (code == HTTP_UPGRADE_REQUIRED)
2331 {
2332 text = urltext;
2333
2334 snprintf(urltext, sizeof(urltext),
2335 _cupsLangString(con->language,
2336 _("You must access this page using the URL "
2337 "<A HREF=\"https://%s:%d%s\">"
2338 "https://%s:%d%s</A>.")),
2339 con->servername, con->serverport, con->uri,
2340 con->servername, con->serverport, con->uri);
2341
2342 snprintf(redirect, sizeof(redirect),
2343 "<META HTTP-EQUIV=\"Refresh\" "
2344 "CONTENT=\"3;URL=https://%s:%d%s\">\n",
2345 con->servername, con->serverport, con->uri);
2346 }
2347 else
2348 text = "";
2349
2350 snprintf(message, sizeof(message),
2351 "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" "
2352 "\"http://www.w3.org/TR/html4/loose.dtd\">\n"
2353 "<HTML>\n"
2354 "<HEAD>\n"
2355 "\t<META HTTP-EQUIV=\"Content-Type\" "
2356 "CONTENT=\"text/html; charset=utf-8\">\n"
2357 "\t<TITLE>%d %s</TITLE>\n"
2358 "\t<LINK REL=\"STYLESHEET\" TYPE=\"text/css\" "
2359 "HREF=\"/cups.css\">\n"
2360 "%s"
2361 "</HEAD>\n"
2362 "<BODY>\n"
2363 "<H1>%d %s</H1>\n"
2364 "<P>%s</P>\n"
2365 "</BODY>\n"
2366 "</HTML>\n",
2367 code, httpStatus(code), redirect, code, httpStatus(code), text);
2368
2369 if (httpPrintf(HTTP(con), "Content-Type: text/html; charset=utf-8\r\n") < 0)
2370 return (0);
2371 if (httpPrintf(HTTP(con), "Content-Length: %d\r\n",
2372 (int)strlen(message)) < 0)
2373 return (0);
2374 if (httpPrintf(HTTP(con), "\r\n") < 0)
2375 return (0);
2376 if (httpPrintf(HTTP(con), "%s", message) < 0)
2377 return (0);
2378 }
2379 else if (httpPrintf(HTTP(con), "\r\n") < 0)
2380 return (0);
2381
2382 if (cupsdFlushHeader(con) < 0)
2383 return (0);
2384
2385 con->http.state = HTTP_WAITING;
2386
2387 return (1);
2388 }
2389
2390
2391 /*
2392 * 'cupsdSendHeader()' - Send an HTTP request.
2393 */
2394
2395 int /* O - 1 on success, 0 on failure */
2396 cupsdSendHeader(
2397 cupsd_client_t *con, /* I - Client to send to */
2398 http_status_t code, /* I - HTTP status code */
2399 char *type, /* I - MIME type of document */
2400 int auth_type) /* I - Type of authentication */
2401 {
2402 char auth_str[1024]; /* Authorization string */
2403 #ifdef HAVE_GSSAPI
2404 static char *gss_buf = NULL; /* Kerberos auth data buffer */
2405 static int gss_bufsize = 0; /* Size of Kerberos auth data buffer */
2406 #endif /* HAVE_GSSAPI */
2407
2408
2409 /*
2410 * Send the HTTP status header...
2411 */
2412
2413 if (code == HTTP_CONTINUE)
2414 {
2415 /*
2416 * 100-continue doesn't send any headers...
2417 */
2418
2419 return (httpPrintf(HTTP(con), "HTTP/%d.%d 100 Continue\r\n\r\n",
2420 con->http.version / 100, con->http.version % 100) > 0);
2421 }
2422
2423 httpFlushWrite(HTTP(con));
2424
2425 con->http.data_encoding = HTTP_ENCODE_FIELDS;
2426
2427 if (httpPrintf(HTTP(con), "HTTP/%d.%d %d %s\r\n", con->http.version / 100,
2428 con->http.version % 100, code, httpStatus(code)) < 0)
2429 return (0);
2430 if (httpPrintf(HTTP(con), "Date: %s\r\n", httpGetDateString(time(NULL))) < 0)
2431 return (0);
2432 if (ServerHeader)
2433 if (httpPrintf(HTTP(con), "Server: %s\r\n", ServerHeader) < 0)
2434 return (0);
2435 if (con->http.keep_alive && con->http.version >= HTTP_1_0)
2436 {
2437 if (httpPrintf(HTTP(con), "Connection: Keep-Alive\r\n") < 0)
2438 return (0);
2439 if (httpPrintf(HTTP(con), "Keep-Alive: timeout=%d\r\n",
2440 KeepAliveTimeout) < 0)
2441 return (0);
2442 }
2443 if (code == HTTP_METHOD_NOT_ALLOWED)
2444 if (httpPrintf(HTTP(con), "Allow: GET, HEAD, OPTIONS, POST, PUT\r\n") < 0)
2445 return (0);
2446
2447 if (code == HTTP_UNAUTHORIZED)
2448 {
2449 if (auth_type == CUPSD_AUTH_NONE)
2450 {
2451 if (!con->best || con->best->type <= CUPSD_AUTH_NONE)
2452 auth_type = DefaultAuthType;
2453 else
2454 auth_type = con->best->type;
2455 }
2456
2457 auth_str[0] = '\0';
2458
2459 if (auth_type == CUPSD_AUTH_BASIC || auth_type == CUPSD_AUTH_BASICDIGEST)
2460 strlcpy(auth_str, "Basic realm=\"CUPS\"", sizeof(auth_str));
2461 else if (auth_type == CUPSD_AUTH_DIGEST)
2462 snprintf(auth_str, sizeof(auth_str), "Digest realm=\"CUPS\", nonce=\"%s\"",
2463 con->http.hostname);
2464 #ifdef HAVE_GSSAPI
2465 else if (auth_type == CUPSD_AUTH_NEGOTIATE && con->gss_output_token.length == 0)
2466 strlcpy(auth_str, "Negotiate", sizeof(auth_str));
2467 #endif /* HAVE_GSSAPI */
2468
2469 #ifdef HAVE_AUTHORIZATION_H
2470 if (con->best && auth_type != CUPSD_AUTH_NEGOTIATE)
2471 {
2472 int i; /* Looping var */
2473 char *auth_key; /* Auth key buffer */
2474 size_t auth_size; /* Size of remaining buffer */
2475
2476
2477 auth_key = auth_str + strlen(auth_str);
2478 auth_size = sizeof(auth_str) - (auth_key - auth_str);
2479
2480 for (i = 0; i < con->best->num_names; i ++)
2481 {
2482 if (!strncasecmp(con->best->names[i], "@AUTHKEY(", 9))
2483 {
2484 snprintf(auth_key, auth_size, ", authkey=\"%s\"",
2485 con->best->names[i] + 9);
2486 /* end parenthesis is stripped in conf.c */
2487 break;
2488 }
2489 else if (!strcasecmp(con->best->names[i], "@SYSTEM") &&
2490 SystemGroupAuthKey)
2491 {
2492 snprintf(auth_key, auth_size, ", authkey=\"%s\"", SystemGroupAuthKey);
2493 break;
2494 }
2495 }
2496 }
2497 #endif /* HAVE_AUTHORIZATION_H */
2498
2499 if (auth_str[0])
2500 {
2501 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdSendHeader: WWW-Authenticate: %s",
2502 auth_str);
2503
2504 if (httpPrintf(HTTP(con), "WWW-Authenticate: %s\r\n", auth_str) < 0)
2505 return (0);
2506 }
2507 }
2508
2509 #ifdef HAVE_GSSAPI
2510 /*
2511 * WWW-Authenticate: Negotiate can be included even for
2512 * non-401 replies...
2513 */
2514
2515 if (con->gss_output_token.length > 0 && con->gss_output_token.length <= 65536)
2516 {
2517 OM_uint32 minor_status; /* Minor status code */
2518 int bufsize; /* Size of output token buffer */
2519
2520
2521 bufsize = con->gss_output_token.length * 4 / 3 + 2;
2522
2523 if (bufsize > gss_bufsize)
2524 {
2525 char *buf; /* New buffer */
2526
2527
2528 bufsize = (bufsize + 1023) & 1023;/* Round up */
2529
2530 if (gss_buf)
2531 buf = realloc(gss_buf, bufsize);
2532 else
2533 buf = malloc(bufsize);
2534
2535 if (!buf)
2536 {
2537 cupsdLogMessage(CUPSD_LOG_ERROR,
2538 "Unable to allocate %d bytes for Kerberos credentials!",
2539 bufsize);
2540 return (0);
2541 }
2542
2543 gss_buf = buf;
2544 gss_bufsize = bufsize;
2545 }
2546
2547 httpEncode64_2(gss_buf, gss_bufsize,
2548 con->gss_output_token.value,
2549 con->gss_output_token.length);
2550 gss_release_buffer(&minor_status, &con->gss_output_token);
2551
2552 cupsdLogMessage(CUPSD_LOG_DEBUG,
2553 "cupsdSendHeader: WWW-Authenticate: Negotiate %s", gss_buf);
2554
2555 if (httpPrintf(HTTP(con), "WWW-Authenticate: Negotiate %s\r\n",
2556 gss_buf) < 0)
2557 return (0);
2558 }
2559 else if (con->gss_output_token.length > 65536)
2560 {
2561 cupsdLogMessage(CUPSD_LOG_ERROR,
2562 "Kerberos credentials larger than 64k (%d)!",
2563 (int)con->gss_output_token.length);
2564 return (0);
2565 }
2566 #endif /* HAVE_GSSAPI */
2567
2568 if (con->language && strcmp(con->language->language, "C"))
2569 {
2570 if (httpPrintf(HTTP(con), "Content-Language: %s\r\n",
2571 con->language->language) < 0)
2572 return (0);
2573 }
2574
2575 if (type)
2576 {
2577 if (!strcmp(type, "text/html"))
2578 {
2579 if (httpPrintf(HTTP(con),
2580 "Content-Type: text/html; charset=utf-8\r\n") < 0)
2581 return (0);
2582 }
2583 else if (httpPrintf(HTTP(con), "Content-Type: %s\r\n", type) < 0)
2584 return (0);
2585 }
2586
2587 return (1);
2588 }
2589
2590
2591 /*
2592 * 'cupsdUpdateCGI()' - Read status messages from CGI scripts and programs.
2593 */
2594
2595 void
2596 cupsdUpdateCGI(void)
2597 {
2598 char *ptr, /* Pointer to end of line in buffer */
2599 message[1024]; /* Pointer to message text */
2600 int loglevel; /* Log level for message */
2601
2602
2603 while ((ptr = cupsdStatBufUpdate(CGIStatusBuffer, &loglevel,
2604 message, sizeof(message))) != NULL)
2605 {
2606 if (loglevel == CUPSD_LOG_INFO)
2607 cupsdLogMessage(CUPSD_LOG_INFO, "%s", message);
2608
2609 if (!strchr(CGIStatusBuffer->buffer, '\n'))
2610 break;
2611 }
2612
2613 if (ptr == NULL && !CGIStatusBuffer->bufused)
2614 {
2615 /*
2616 * Fatal error on pipe - should never happen!
2617 */
2618
2619 cupsdLogMessage(CUPSD_LOG_CRIT,
2620 "cupsdUpdateCGI: error reading from CGI error pipe - %s",
2621 strerror(errno));
2622 }
2623 }
2624
2625
2626 /*
2627 * 'cupsdWriteClient()' - Write data to a client as needed.
2628 */
2629
2630 void
2631 cupsdWriteClient(cupsd_client_t *con) /* I - Client connection */
2632 {
2633 int bytes; /* Number of bytes written */
2634 char buf[16385]; /* Data buffer */
2635 char *bufptr; /* Pointer into buffer */
2636 ipp_state_t ipp_state; /* IPP state value */
2637
2638
2639 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2640 "cupsdWriteClient(con=%p(%d)) response=%p(%d), file=%d "
2641 "pipe_pid=%d state=%d",
2642 con, con->http.fd, con->response,
2643 con->response ? con->response->state : -1,
2644 con->file, con->pipe_pid, con->http.state);
2645
2646 if (con->http.state != HTTP_GET_SEND &&
2647 con->http.state != HTTP_POST_SEND)
2648 return;
2649
2650 if (con->pipe_pid)
2651 {
2652 /*
2653 * Make sure we select on the CGI output...
2654 */
2655
2656 cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con);
2657
2658 if (!con->file_ready)
2659 {
2660 /*
2661 * Try again later when there is CGI output available...
2662 */
2663
2664 cupsdRemoveSelect(con->http.fd);
2665 return;
2666 }
2667
2668 con->file_ready = 0;
2669 }
2670
2671 if (con->response && con->response->state != IPP_DATA)
2672 {
2673 ipp_state = ippWrite(HTTP(con), con->response);
2674 bytes = ipp_state != IPP_ERROR &&
2675 (con->file >= 0 || ipp_state != IPP_DATA);
2676 }
2677 else if ((bytes = read(con->file, buf, sizeof(buf) - 1)) > 0)
2678 {
2679 if (con->pipe_pid && !con->got_fields)
2680 {
2681 /*
2682 * Inspect the data for Content-Type and other fields.
2683 */
2684
2685 buf[bytes] = '\0';
2686
2687 for (bufptr = buf; !con->got_fields && *bufptr; bufptr ++)
2688 {
2689 if (*bufptr == '\n')
2690 {
2691 /*
2692 * Send line to client...
2693 */
2694
2695 if (bufptr > buf && bufptr[-1] == '\r')
2696 bufptr[-1] = '\0';
2697 *bufptr++ = '\0';
2698
2699 cupsdLogMessage(CUPSD_LOG_DEBUG, "Script header: %s", buf);
2700
2701 if (!con->sent_header)
2702 {
2703 /*
2704 * Handle redirection and CGI status codes...
2705 */
2706
2707 if (!strncasecmp(buf, "Location:", 9))
2708 {
2709 cupsdSendHeader(con, HTTP_SEE_OTHER, NULL, CUPSD_AUTH_NONE);
2710 con->sent_header = 2;
2711
2712 if (httpPrintf(HTTP(con), "Content-Length: 0\r\n") < 0)
2713 return;
2714 }
2715 else if (!strncasecmp(buf, "Status:", 7))
2716 {
2717 cupsdSendError(con, (http_status_t)atoi(buf + 7), CUPSD_AUTH_NONE);
2718 con->sent_header = 2;
2719 }
2720 else
2721 {
2722 cupsdSendHeader(con, HTTP_OK, NULL, CUPSD_AUTH_NONE);
2723 con->sent_header = 1;
2724
2725 if (con->http.version == HTTP_1_1)
2726 {
2727 if (httpPrintf(HTTP(con), "Transfer-Encoding: chunked\r\n") < 0)
2728 return;
2729 }
2730 }
2731 }
2732
2733 if (strncasecmp(buf, "Status:", 7))
2734 httpPrintf(HTTP(con), "%s\r\n", buf);
2735
2736 /*
2737 * Update buffer...
2738 */
2739
2740 bytes -= (bufptr - buf);
2741
2742 if (bytes > 0)
2743 memmove(buf, bufptr, bytes + 1);
2744 else
2745 buf[0] = '\0';
2746
2747 bufptr = buf - 1;
2748
2749 /*
2750 * See if the line was empty...
2751 */
2752
2753 if (con->field_col == 0)
2754 {
2755 con->got_fields = 1;
2756
2757 if (cupsdFlushHeader(con) < 0)
2758 {
2759 cupsdCloseClient(con);
2760 return;
2761 }
2762
2763 if (con->http.version == HTTP_1_1)
2764 con->http.data_encoding = HTTP_ENCODE_CHUNKED;
2765 }
2766 else
2767 con->field_col = 0;
2768 }
2769 else if (*bufptr != '\r')
2770 con->field_col ++;
2771 }
2772
2773 if (bytes > 0 && !con->got_fields)
2774 {
2775 /*
2776 * Remaining text needs to go out...
2777 */
2778
2779 httpPrintf(HTTP(con), "%s", buf);
2780
2781 con->http.activity = time(NULL);
2782 return;
2783 }
2784 else if (bytes == 0)
2785 {
2786 con->http.activity = time(NULL);
2787 return;
2788 }
2789 }
2790
2791 if (bytes > 0)
2792 {
2793 if (httpWrite2(HTTP(con), buf, bytes) < 0)
2794 {
2795 cupsdCloseClient(con);
2796 return;
2797 }
2798
2799 if (con->http.data_encoding == HTTP_ENCODE_CHUNKED)
2800 httpFlushWrite(HTTP(con));
2801
2802 con->bytes += bytes;
2803
2804 if (con->http.state == HTTP_WAITING)
2805 bytes = 0;
2806 }
2807 }
2808
2809 if (bytes <= 0)
2810 {
2811 cupsdLogRequest(con, HTTP_OK);
2812
2813 httpFlushWrite(HTTP(con));
2814
2815 if (con->http.data_encoding == HTTP_ENCODE_CHUNKED && con->sent_header == 1)
2816 {
2817 if (httpWrite2(HTTP(con), "", 0) < 0)
2818 {
2819 cupsdCloseClient(con);
2820 return;
2821 }
2822 }
2823
2824 con->http.state = HTTP_WAITING;
2825
2826 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
2827
2828 if (con->file >= 0)
2829 {
2830 cupsdRemoveSelect(con->file);
2831
2832 if (con->pipe_pid)
2833 cupsdEndProcess(con->pipe_pid, 0);
2834
2835 close(con->file);
2836 con->file = -1;
2837 con->pipe_pid = 0;
2838 }
2839
2840 if (con->filename)
2841 {
2842 unlink(con->filename);
2843 cupsdClearString(&con->filename);
2844 }
2845
2846 if (con->request)
2847 {
2848 ippDelete(con->request);
2849 con->request = NULL;
2850 }
2851
2852 if (con->response)
2853 {
2854 ippDelete(con->response);
2855 con->response = NULL;
2856 }
2857
2858 cupsdClearString(&con->command);
2859 cupsdClearString(&con->options);
2860 cupsdClearString(&con->query_string);
2861
2862 if (!con->http.keep_alive)
2863 {
2864 cupsdCloseClient(con);
2865 return;
2866 }
2867 }
2868
2869 con->http.activity = time(NULL);
2870 }
2871
2872
2873 /*
2874 * 'check_if_modified()' - Decode an "If-Modified-Since" line.
2875 */
2876
2877 static int /* O - 1 if modified since */
2878 check_if_modified(
2879 cupsd_client_t *con, /* I - Client connection */
2880 struct stat *filestats) /* I - File information */
2881 {
2882 char *ptr; /* Pointer into field */
2883 time_t date; /* Time/date value */
2884 off_t size; /* Size/length value */
2885
2886
2887 size = 0;
2888 date = 0;
2889 ptr = con->http.fields[HTTP_FIELD_IF_MODIFIED_SINCE];
2890
2891 if (*ptr == '\0')
2892 return (1);
2893
2894 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2895 "check_if_modified(con=%p(%d), "
2896 "filestats=%p(" CUPS_LLFMT ", %d)) If-Modified-Since=\"%s\"",
2897 con, con->http.fd, filestats, CUPS_LLCAST filestats->st_size,
2898 (int)filestats->st_mtime, ptr);
2899
2900 while (*ptr != '\0')
2901 {
2902 while (isspace(*ptr) || *ptr == ';')
2903 ptr ++;
2904
2905 if (strncasecmp(ptr, "length=", 7) == 0)
2906 {
2907 ptr += 7;
2908 size = strtoll(ptr, NULL, 10);
2909
2910 while (isdigit(*ptr))
2911 ptr ++;
2912 }
2913 else if (isalpha(*ptr))
2914 {
2915 date = httpGetDateTime(ptr);
2916 while (*ptr != '\0' && *ptr != ';')
2917 ptr ++;
2918 }
2919 else
2920 ptr ++;
2921 }
2922
2923 return ((size != filestats->st_size && size != 0) ||
2924 (date < filestats->st_mtime && date != 0) ||
2925 (size == 0 && date == 0));
2926 }
2927
2928
2929 /*
2930 * 'compare_clients()' - Compare two client connections.
2931 */
2932
2933 static int /* O - Result of comparison */
2934 compare_clients(cupsd_client_t *a, /* I - First client */
2935 cupsd_client_t *b, /* I - Second client */
2936 void *data) /* I - User data (not used) */
2937 {
2938 (void)data;
2939
2940 if (a == b)
2941 return (0);
2942 else if (a < b)
2943 return (-1);
2944 else
2945 return (1);
2946 }
2947
2948
2949 /*
2950 * 'data_ready()' - Check whether data is available from a client.
2951 */
2952
2953 static int /* O - 1 if data is ready, 0 otherwise */
2954 data_ready(cupsd_client_t *con) /* I - Client */
2955 {
2956 if (con->http.used > 0)
2957 return (1);
2958 #ifdef HAVE_SSL
2959 else if (con->http.tls)
2960 {
2961 # ifdef HAVE_LIBSSL
2962 if (SSL_pending((SSL *)(con->http.tls)))
2963 return (1);
2964 # elif defined(HAVE_GNUTLS)
2965 if (gnutls_record_check_pending(((http_tls_t *)(con->http.tls))->session))
2966 return (1);
2967 # elif defined(HAVE_CDSASSL)
2968 size_t bytes; /* Bytes that are available */
2969
2970 if (!SSLGetBufferedReadSize(((http_tls_t *)(con->http.tls))->session,
2971 &bytes) && bytes > 0)
2972 return (1);
2973 # endif /* HAVE_LIBSSL */
2974 }
2975 #endif /* HAVE_SSL */
2976
2977 return (0);
2978 }
2979
2980
2981 #ifdef HAVE_SSL
2982 /*
2983 * 'encrypt_client()' - Enable encryption for the client...
2984 */
2985
2986 static int /* O - 1 on success, 0 on error */
2987 encrypt_client(cupsd_client_t *con) /* I - Client to encrypt */
2988 {
2989 # ifdef HAVE_LIBSSL
2990 SSL_CTX *context; /* Context for encryption */
2991 SSL *conn; /* Connection for encryption */
2992 BIO *bio; /* BIO data */
2993 unsigned long error; /* Error code */
2994
2995
2996 cupsdLogMessage(CUPSD_LOG_DEBUG2, "encrypt_client(con=%p(%d))", con,
2997 con->http.fd);
2998
2999 /*
3000 * Verify that we have a certificate...
3001 */
3002
3003 if (access(ServerKey, 0) || access(ServerCertificate, 0))
3004 {
3005 /*
3006 * Nope, make a self-signed certificate...
3007 */
3008
3009 if (!make_certificate(con))
3010 return (0);
3011 }
3012
3013 /*
3014 * Create the SSL context and accept the connection...
3015 */
3016
3017 context = SSL_CTX_new(SSLv23_server_method());
3018
3019 SSL_CTX_set_options(context, SSL_OP_NO_SSLv2); /* Only use SSLv3 or TLS */
3020 if (SSLOptions & CUPSD_SSL_NOEMPTY)
3021 SSL_CTX_set_options(context, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
3022 SSL_CTX_use_PrivateKey_file(context, ServerKey, SSL_FILETYPE_PEM);
3023 SSL_CTX_use_certificate_chain_file(context, ServerCertificate);
3024
3025 bio = BIO_new(_httpBIOMethods());
3026 BIO_ctrl(bio, BIO_C_SET_FILE_PTR, 0, (char *)HTTP(con));
3027
3028 conn = SSL_new(context);
3029 SSL_set_bio(conn, bio, bio);
3030
3031 if (SSL_accept(conn) != 1)
3032 {
3033 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to encrypt connection from %s!",
3034 con->http.hostname);
3035
3036 while ((error = ERR_get_error()) != 0)
3037 cupsdLogMessage(CUPSD_LOG_ERROR, "%s", ERR_error_string(error, NULL));
3038
3039 SSL_CTX_free(context);
3040 SSL_free(conn);
3041 return (0);
3042 }
3043
3044 cupsdLogMessage(CUPSD_LOG_DEBUG, "Connection from %s now encrypted.",
3045 con->http.hostname);
3046
3047 con->http.tls = conn;
3048 return (1);
3049
3050 # elif defined(HAVE_GNUTLS)
3051 http_tls_t *conn; /* TLS session object */
3052 int error; /* Error code */
3053 gnutls_certificate_server_credentials *credentials;
3054 /* TLS credentials */
3055
3056
3057 cupsdLogMessage(CUPSD_LOG_DEBUG2, "encrypt_client(con=%p(%d))", con,
3058 con->http.fd);
3059
3060 /*
3061 * Verify that we have a certificate...
3062 */
3063
3064 if (access(ServerKey, 0) || access(ServerCertificate, 0))
3065 {
3066 /*
3067 * Nope, make a self-signed certificate...
3068 */
3069
3070 if (!make_certificate(con))
3071 return (0);
3072 }
3073
3074 /*
3075 * Create the SSL object and perform the SSL handshake...
3076 */
3077
3078 conn = (http_tls_t *)malloc(sizeof(http_tls_t));
3079
3080 if (conn == NULL)
3081 return (0);
3082
3083 credentials = (gnutls_certificate_server_credentials *)
3084 malloc(sizeof(gnutls_certificate_server_credentials));
3085 if (credentials == NULL)
3086 {
3087 cupsdLogMessage(CUPSD_LOG_ERROR,
3088 "Unable to encrypt connection from %s - %s",
3089 con->http.hostname, strerror(errno));
3090
3091 free(conn);
3092 return (0);
3093 }
3094
3095 gnutls_certificate_allocate_credentials(credentials);
3096 gnutls_certificate_set_x509_key_file(*credentials, ServerCertificate,
3097 ServerKey, GNUTLS_X509_FMT_PEM);
3098
3099 gnutls_init(&(conn->session), GNUTLS_SERVER);
3100 gnutls_set_default_priority(conn->session);
3101 gnutls_credentials_set(conn->session, GNUTLS_CRD_CERTIFICATE, *credentials);
3102 gnutls_transport_set_ptr(conn->session, (gnutls_transport_ptr)HTTP(con));
3103 gnutls_transport_set_pull_function(conn->session, _httpReadGNUTLS);
3104 gnutls_transport_set_push_function(conn->session, _httpWriteGNUTLS);
3105
3106 error = gnutls_handshake(conn->session);
3107
3108 if (error != GNUTLS_E_SUCCESS)
3109 {
3110 cupsdLogMessage(CUPSD_LOG_ERROR,
3111 "Unable to encrypt connection from %s - %s",
3112 con->http.hostname, gnutls_strerror(error));
3113
3114 gnutls_deinit(conn->session);
3115 gnutls_certificate_free_credentials(*credentials);
3116 free(conn);
3117 free(credentials);
3118 return (0);
3119 }
3120
3121 cupsdLogMessage(CUPSD_LOG_DEBUG, "Connection from %s now encrypted.",
3122 con->http.hostname);
3123
3124 conn->credentials = credentials;
3125 con->http.tls = conn;
3126 return (1);
3127
3128 # elif defined(HAVE_CDSASSL)
3129 OSStatus error; /* Error code */
3130 http_tls_t *conn; /* CDSA connection information */
3131
3132
3133 cupsdLogMessage(CUPSD_LOG_DEBUG2, "encrypt_client(con=%p(%d))", con,
3134 con->http.fd);
3135
3136 if ((conn = (http_tls_t *)malloc(sizeof(http_tls_t))) == NULL)
3137 return (0);
3138
3139 error = 0;
3140 conn->session = NULL;
3141 conn->certsArray = get_cdsa_certificate(con);
3142
3143 if (!conn->certsArray)
3144 {
3145 /*
3146 * No keychain (yet), make a self-signed certificate...
3147 */
3148
3149 if (make_certificate(con))
3150 conn->certsArray = get_cdsa_certificate(con);
3151 }
3152
3153 if (!conn->certsArray)
3154 {
3155 cupsdLogMessage(CUPSD_LOG_ERROR,
3156 "Could not find signing key in keychain \"%s\"",
3157 ServerCertificate);
3158 error = errSSLBadCert; /* errSSLBadConfiguration is a better choice, but not available on 10.2.x */
3159 }
3160
3161 if (!error)
3162 error = SSLNewContext(true, &conn->session);
3163
3164 if (!error)
3165 error = SSLSetIOFuncs(conn->session, _httpReadCDSA, _httpWriteCDSA);
3166
3167 if (!error)
3168 error = SSLSetProtocolVersionEnabled(conn->session, kSSLProtocol2, false);
3169
3170 if (!error)
3171 error = SSLSetConnection(conn->session, HTTP(con));
3172
3173 if (!error)
3174 error = SSLSetAllowsExpiredCerts(conn->session, true);
3175
3176 if (!error)
3177 error = SSLSetAllowsAnyRoot(conn->session, true);
3178
3179 if (!error)
3180 error = SSLSetCertificate(conn->session, conn->certsArray);
3181
3182 if (!error)
3183 {
3184 /*
3185 * Perform SSL/TLS handshake
3186 */
3187
3188 while ((error = SSLHandshake(conn->session)) == errSSLWouldBlock)
3189 usleep(1000);
3190 }
3191
3192 if (error)
3193 {
3194 cupsdLogMessage(CUPSD_LOG_ERROR,
3195 "Unable to encrypt connection from %s - %s (%d)",
3196 con->http.hostname, cssmErrorString(error), (int)error);
3197
3198 con->http.error = error;
3199 con->http.status = HTTP_ERROR;
3200
3201 if (conn->session)
3202 SSLDisposeContext(conn->session);
3203
3204 if (conn->certsArray)
3205 CFRelease(conn->certsArray);
3206
3207 free(conn);
3208
3209 return (0);
3210 }
3211
3212 cupsdLogMessage(CUPSD_LOG_DEBUG, "Connection from %s now encrypted.",
3213 con->http.hostname);
3214
3215 con->http.tls = conn;
3216 return (1);
3217
3218 # endif /* HAVE_LIBSSL */
3219 }
3220 #endif /* HAVE_SSL */
3221
3222
3223 #ifdef HAVE_CDSASSL
3224 /*
3225 * 'get_cdsa_certificate()' - Get a SSL/TLS certificate from the System keychain.
3226 */
3227
3228 static CFArrayRef /* O - Array of certificates */
3229 get_cdsa_certificate(cupsd_client_t *con) /* I - Client connection */
3230 {
3231 OSStatus err; /* Error info */
3232 SecKeychainRef keychain; /* Keychain reference */
3233 SecIdentitySearchRef search; /* Search reference */
3234 SecIdentityRef identity; /* Identity */
3235 CFArrayRef certificates = NULL;
3236 /* Certificate array */
3237
3238
3239 if ((err = SecKeychainOpen(ServerCertificate, &keychain)))
3240 {
3241 cupsdLogMessage(CUPSD_LOG_ERROR, "Cannot open keychain \"%s\" - %s (%d)",
3242 ServerCertificate, cssmErrorString(err), (int)err);
3243 return (NULL);
3244 }
3245
3246 # if HAVE_SECIDENTITYSEARCHCREATEWITHPOLICY
3247 /*
3248 * Use a policy to search for valid certificates who's common name matches the
3249 * servername...
3250 */
3251
3252 SecPolicySearchRef policy_search; /* Policy search ref */
3253 SecPolicyRef policy; /* Policy ref */
3254 CSSM_DATA options; /* Policy options */
3255 CSSM_APPLE_TP_SSL_OPTIONS
3256 ssl_options; /* SSL Option for hostname */
3257
3258
3259 if (SecPolicySearchCreate(CSSM_CERT_X_509v3, &CSSMOID_APPLE_TP_SSL,
3260 NULL, &policy_search))
3261 {
3262 cupsdLogMessage(CUPSD_LOG_ERROR, "Cannot create a policy search reference");
3263 CFRelease(keychain);
3264 return (NULL);
3265 }
3266
3267 if (SecPolicySearchCopyNext(policy_search, &policy))
3268 {
3269 cupsdLogMessage(CUPSD_LOG_ERROR,
3270 "Cannot find a policy to use for searching");
3271 CFRelease(keychain);
3272 CFRelease(policy_search);
3273 return (NULL);
3274 }
3275
3276 memset(&ssl_options, 0, sizeof(ssl_options));
3277 ssl_options.Version = CSSM_APPLE_TP_SSL_OPTS_VERSION;
3278 ssl_options.ServerName = con->servername;
3279 ssl_options.ServerNameLen = strlen(con->servername);
3280
3281 options.Data = (uint8 *)&ssl_options;
3282 options.Length = sizeof(ssl_options);
3283
3284 if (SecPolicySetValue(policy, &options))
3285 {
3286 cupsdLogMessage(CUPSD_LOG_ERROR,
3287 "Cannot set policy value to use for searching");
3288 CFRelease(keychain);
3289 CFRelease(policy_search);
3290 return (NULL);
3291 }
3292
3293 err = SecIdentitySearchCreateWithPolicy(policy, NULL, CSSM_KEYUSE_SIGN,
3294 keychain, FALSE, &search);
3295 # else
3296 /*
3297 * Assume there is exactly one SecIdentity in the keychain...
3298 */
3299
3300 err = SecIdentitySearchCreate(keychain, CSSM_KEYUSE_SIGN, &search);
3301 # endif /* HAVE_SECIDENTITYSEARCHCREATEWITHPOLICY */
3302
3303 if (err)
3304 cupsdLogMessage(CUPSD_LOG_DEBUG,
3305 "Cannot create keychain search reference: %s (%d)",
3306 cssmErrorString(err), (int)err);
3307 else
3308 {
3309 if ((err = SecIdentitySearchCopyNext(search, &identity)))
3310 {
3311 cupsdLogMessage(CUPSD_LOG_DEBUG,
3312 "Cannot find signing key in keychain \"%s\": %s (%d)",
3313 ServerCertificate, cssmErrorString(err), (int)err);
3314 }
3315 else
3316 {
3317 if (CFGetTypeID(identity) != SecIdentityGetTypeID())
3318 cupsdLogMessage(CUPSD_LOG_ERROR,
3319 "SecIdentitySearchCopyNext CFTypeID failure!");
3320 else
3321 {
3322 if ((certificates = CFArrayCreate(NULL, (const void **)&identity,
3323 1, &kCFTypeArrayCallBacks)) == NULL)
3324 cupsdLogMessage(CUPSD_LOG_ERROR, "Cannot create certificate array");
3325 }
3326
3327 CFRelease(identity);
3328 }
3329
3330 CFRelease(search);
3331 }
3332
3333 # if HAVE_SECIDENTITYSEARCHCREATEWITHPOLICY
3334 CFRelease(policy);
3335 CFRelease(policy_search);
3336 # endif /* HAVE_SECIDENTITYSEARCHCREATEWITHPOLICY */
3337
3338 return (certificates);
3339 }
3340 #endif /* HAVE_CDSASSL */
3341
3342
3343 /*
3344 * 'get_file()' - Get a filename and state info.
3345 */
3346
3347 static char * /* O - Real filename */
3348 get_file(cupsd_client_t *con, /* I - Client connection */
3349 struct stat *filestats, /* O - File information */
3350 char *filename, /* IO - Filename buffer */
3351 int len) /* I - Buffer length */
3352 {
3353 int status; /* Status of filesystem calls */
3354 char *ptr; /* Pointer info filename */
3355 int plen; /* Remaining length after pointer */
3356 char language[7]; /* Language subdirectory, if any */
3357
3358
3359 /*
3360 * Figure out the real filename...
3361 */
3362
3363 language[0] = '\0';
3364
3365 if (!strncmp(con->uri, "/ppd/", 5))
3366 snprintf(filename, len, "%s%s", ServerRoot, con->uri);
3367 else if (!strncmp(con->uri, "/rss/", 5) && !strchr(con->uri + 5, '/'))
3368 snprintf(filename, len, "%s/rss/%s", CacheDir, con->uri + 5);
3369 else if (!strncmp(con->uri, "/admin/conf/", 12))
3370 snprintf(filename, len, "%s%s", ServerRoot, con->uri + 11);
3371 else if (!strncmp(con->uri, "/admin/log/", 11))
3372 {
3373 if (!strncmp(con->uri + 11, "access_log", 10) && AccessLog[0] == '/')
3374 strlcpy(filename, AccessLog, len);
3375 else if (!strncmp(con->uri + 11, "error_log", 9) && ErrorLog[0] == '/')
3376 strlcpy(filename, ErrorLog, len);
3377 else if (!strncmp(con->uri + 11, "page_log", 8) && PageLog[0] == '/')
3378 strlcpy(filename, PageLog, len);
3379 else
3380 return (NULL);
3381 }
3382 else if (con->language)
3383 {
3384 snprintf(language, sizeof(language), "/%s", con->language->language);
3385 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3386 }
3387 else
3388 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
3389
3390 if ((ptr = strchr(filename, '?')) != NULL)
3391 *ptr = '\0';
3392
3393 /*
3394 * Grab the status for this language; if there isn't a language-specific file
3395 * then fallback to the default one...
3396 */
3397
3398 if ((status = stat(filename, filestats)) != 0 && language[0] &&
3399 strncmp(con->uri, "/ppd/", 5) &&
3400 strncmp(con->uri, "/admin/conf/", 12) &&
3401 strncmp(con->uri, "/admin/log/", 11))
3402 {
3403 /*
3404 * Drop the country code...
3405 */
3406
3407 language[3] = '\0';
3408 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3409
3410 if ((ptr = strchr(filename, '?')) != NULL)
3411 *ptr = '\0';
3412
3413 if ((status = stat(filename, filestats)) != 0)
3414 {
3415 /*
3416 * Drop the language prefix and try the root directory...
3417 */
3418
3419 language[0] = '\0';
3420 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
3421
3422 if ((ptr = strchr(filename, '?')) != NULL)
3423 *ptr = '\0';
3424
3425 status = stat(filename, filestats);
3426 }
3427 }
3428
3429 /*
3430 * If we're found a directory, get the index.html file instead...
3431 */
3432
3433 if (!status && S_ISDIR(filestats->st_mode))
3434 {
3435 /*
3436 * Make sure the URI ends with a slash...
3437 */
3438
3439 if (con->uri[strlen(con->uri) - 1] != '/')
3440 strlcat(con->uri, "/", sizeof(con->uri));
3441
3442 /*
3443 * Find the directory index file, trying every language...
3444 */
3445
3446 do
3447 {
3448 if (status && language[0])
3449 {
3450 /*
3451 * Try a different language subset...
3452 */
3453
3454 if (language[3])
3455 language[0] = '\0'; /* Strip country code */
3456 else
3457 language[0] = '\0'; /* Strip language */
3458 }
3459
3460 /*
3461 * Look for the index file...
3462 */
3463
3464 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3465
3466 if ((ptr = strchr(filename, '?')) != NULL)
3467 *ptr = '\0';
3468
3469 ptr = filename + strlen(filename);
3470 plen = len - (ptr - filename);
3471
3472 strlcpy(ptr, "index.html", plen);
3473 status = stat(filename, filestats);
3474
3475 #ifdef HAVE_JAVA
3476 if (status)
3477 {
3478 strlcpy(ptr, "index.class", plen);
3479 status = stat(filename, filestats);
3480 }
3481 #endif /* HAVE_JAVA */
3482
3483 #ifdef HAVE_PERL
3484 if (status)
3485 {
3486 strlcpy(ptr, "index.pl", plen);
3487 status = stat(filename, filestats);
3488 }
3489 #endif /* HAVE_PERL */
3490
3491 #ifdef HAVE_PHP
3492 if (status)
3493 {
3494 strlcpy(ptr, "index.php", plen);
3495 status = stat(filename, filestats);
3496 }
3497 #endif /* HAVE_PHP */
3498
3499 #ifdef HAVE_PYTHON
3500 if (status)
3501 {
3502 strlcpy(ptr, "index.pyc", plen);
3503 status = stat(filename, filestats);
3504 }
3505
3506 if (status)
3507 {
3508 strlcpy(ptr, "index.py", plen);
3509 status = stat(filename, filestats);
3510 }
3511 #endif /* HAVE_PYTHON */
3512
3513 }
3514 while (status && language[0]);
3515 }
3516
3517 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3518 "get_file(con=%p(%d), filestats=%p, filename=%p, len=%d) = "
3519 "%s", con, con->http.fd, filestats, filename, len,
3520 status ? "(null)" : filename);
3521
3522 if (!status)
3523 con->http.data_remaining = (int)filestats->st_size;
3524
3525 if (status)
3526 return (NULL);
3527 else
3528 return (filename);
3529 }
3530
3531
3532 /*
3533 * 'install_conf_file()' - Install a configuration file.
3534 */
3535
3536 static http_status_t /* O - Status */
3537 install_conf_file(cupsd_client_t *con) /* I - Connection */
3538 {
3539 cups_file_t *in, /* Input file */
3540 *out; /* Output file */
3541 char buffer[1024]; /* Copy buffer */
3542 int bytes; /* Number of bytes */
3543 char conffile[1024], /* Configuration filename */
3544 newfile[1024], /* New config filename */
3545 oldfile[1024]; /* Old config filename */
3546 struct stat confinfo; /* Config file info */
3547
3548
3549 /*
3550 * First construct the filenames...
3551 */
3552
3553 snprintf(conffile, sizeof(conffile), "%s%s", ServerRoot, con->uri + 11);
3554 snprintf(newfile, sizeof(newfile), "%s%s.N", ServerRoot, con->uri + 11);
3555 snprintf(oldfile, sizeof(oldfile), "%s%s.O", ServerRoot, con->uri + 11);
3556
3557 cupsdLogMessage(CUPSD_LOG_INFO, "Installing config file \"%s\"...", conffile);
3558
3559 /*
3560 * Get the owner, group, and permissions of the configuration file.
3561 * If it doesn't exist, assign it to the User and Group in the
3562 * cupsd.conf file with mode 0640 permissions.
3563 */
3564
3565 if (stat(conffile, &confinfo))
3566 {
3567 confinfo.st_uid = User;
3568 confinfo.st_gid = Group;
3569 confinfo.st_mode = ConfigFilePerm;
3570 }
3571
3572 /*
3573 * Open the request file and new config file...
3574 */
3575
3576 if ((in = cupsFileOpen(con->filename, "rb")) == NULL)
3577 {
3578 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open request file \"%s\" - %s",
3579 con->filename, strerror(errno));
3580 return (HTTP_SERVER_ERROR);
3581 }
3582
3583 if ((out = cupsFileOpen(newfile, "wb")) == NULL)
3584 {
3585 cupsFileClose(in);
3586 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open config file \"%s\" - %s",
3587 newfile, strerror(errno));
3588 return (HTTP_SERVER_ERROR);
3589 }
3590
3591 fchmod(cupsFileNumber(out), confinfo.st_mode);
3592 fchown(cupsFileNumber(out), confinfo.st_uid, confinfo.st_gid);
3593
3594 /*
3595 * Copy from the request to the new config file...
3596 */
3597
3598 while ((bytes = cupsFileRead(in, buffer, sizeof(buffer))) > 0)
3599 if (cupsFileWrite(out, buffer, bytes) < bytes)
3600 {
3601 cupsdLogMessage(CUPSD_LOG_ERROR,
3602 "Unable to copy to config file \"%s\" - %s",
3603 newfile, strerror(errno));
3604
3605 cupsFileClose(in);
3606 cupsFileClose(out);
3607 unlink(newfile);
3608
3609 return (HTTP_SERVER_ERROR);
3610 }
3611
3612 /*
3613 * Close the files...
3614 */
3615
3616 cupsFileClose(in);
3617 if (cupsFileClose(out))
3618 {
3619 cupsdLogMessage(CUPSD_LOG_ERROR,
3620 "Error file closing config file \"%s\" - %s",
3621 newfile, strerror(errno));
3622
3623 unlink(newfile);
3624
3625 return (HTTP_SERVER_ERROR);
3626 }
3627
3628 /*
3629 * Remove the request file...
3630 */
3631
3632 unlink(con->filename);
3633 cupsdClearString(&con->filename);
3634
3635 /*
3636 * Unlink the old backup, rename the current config file to the backup
3637 * filename, and rename the new config file to the config file name...
3638 */
3639
3640 if (unlink(oldfile))
3641 if (errno != ENOENT)
3642 {
3643 cupsdLogMessage(CUPSD_LOG_ERROR,
3644 "Unable to remove backup config file \"%s\" - %s",
3645 oldfile, strerror(errno));
3646
3647 unlink(newfile);
3648
3649 return (HTTP_SERVER_ERROR);
3650 }
3651
3652 if (rename(conffile, oldfile))
3653 if (errno != ENOENT)
3654 {
3655 cupsdLogMessage(CUPSD_LOG_ERROR,
3656 "Unable to rename old config file \"%s\" - %s",
3657 conffile, strerror(errno));
3658
3659 unlink(newfile);
3660
3661 return (HTTP_SERVER_ERROR);
3662 }
3663
3664 if (rename(newfile, conffile))
3665 {
3666 cupsdLogMessage(CUPSD_LOG_ERROR,
3667 "Unable to rename new config file \"%s\" - %s",
3668 newfile, strerror(errno));
3669
3670 rename(oldfile, conffile);
3671 unlink(newfile);
3672
3673 return (HTTP_SERVER_ERROR);
3674 }
3675
3676 /*
3677 * If the cupsd.conf file was updated, set the NeedReload flag...
3678 */
3679
3680 if (!strcmp(con->uri, "/admin/conf/cupsd.conf"))
3681 NeedReload = RELOAD_CUPSD;
3682 else
3683 NeedReload = RELOAD_ALL;
3684
3685 ReloadTime = time(NULL);
3686
3687 /*
3688 * Return that the file was created successfully...
3689 */
3690
3691 return (HTTP_CREATED);
3692 }
3693
3694
3695 /*
3696 * 'is_cgi()' - Is the resource a CGI script/program?
3697 */
3698
3699 static int /* O - 1 = CGI, 0 = file */
3700 is_cgi(cupsd_client_t *con, /* I - Client connection */
3701 const char *filename, /* I - Real filename */
3702 struct stat *filestats, /* I - File information */
3703 mime_type_t *type) /* I - MIME type */
3704 {
3705 const char *options; /* Options on URL */
3706
3707
3708 /*
3709 * Get the options, if any...
3710 */
3711
3712 if ((options = strchr(con->uri, '?')) != NULL)
3713 {
3714 options ++;
3715 cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", options);
3716 }
3717
3718 /*
3719 * Check for known types...
3720 */
3721
3722 if (!type || strcasecmp(type->super, "application"))
3723 {
3724 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3725 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3726 "type=%s/%s) = 0", con, con->http.fd, filename, filestats,
3727 type ? type->super : "unknown",
3728 type ? type->type : "unknown");
3729 return (0);
3730 }
3731
3732 if (!strcasecmp(type->type, "x-httpd-cgi") &&
3733 (filestats->st_mode & 0111))
3734 {
3735 /*
3736 * "application/x-httpd-cgi" is a CGI script.
3737 */
3738
3739 cupsdSetString(&con->command, filename);
3740
3741 if (options)
3742 cupsdSetStringf(&con->options, " %s", options);
3743
3744 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3745 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3746 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3747 type ? type->super : "unknown",
3748 type ? type->type : "unknown");
3749 return (1);
3750 }
3751 #ifdef HAVE_JAVA
3752 else if (!strcasecmp(type->type, "x-httpd-java"))
3753 {
3754 /*
3755 * "application/x-httpd-java" is a Java servlet.
3756 */
3757
3758 cupsdSetString(&con->command, CUPS_JAVA);
3759
3760 if (options)
3761 cupsdSetStringf(&con->options, " %s %s", filename, options);
3762 else
3763 cupsdSetStringf(&con->options, " %s", filename);
3764
3765 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3766 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3767 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3768 type ? type->super : "unknown",
3769 type ? type->type : "unknown");
3770 return (1);
3771 }
3772 #endif /* HAVE_JAVA */
3773 #ifdef HAVE_PERL
3774 else if (!strcasecmp(type->type, "x-httpd-perl"))
3775 {
3776 /*
3777 * "application/x-httpd-perl" is a Perl page.
3778 */
3779
3780 cupsdSetString(&con->command, CUPS_PERL);
3781
3782 if (options)
3783 cupsdSetStringf(&con->options, " %s %s", filename, options);
3784 else
3785 cupsdSetStringf(&con->options, " %s", filename);
3786
3787 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3788 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3789 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3790 type ? type->super : "unknown",
3791 type ? type->type : "unknown");
3792 return (1);
3793 }
3794 #endif /* HAVE_PERL */
3795 #ifdef HAVE_PHP
3796 else if (!strcasecmp(type->type, "x-httpd-php"))
3797 {
3798 /*
3799 * "application/x-httpd-php" is a PHP page.
3800 */
3801
3802 cupsdSetString(&con->command, CUPS_PHP);
3803
3804 if (options)
3805 cupsdSetStringf(&con->options, " %s %s", filename, options);
3806 else
3807 cupsdSetStringf(&con->options, " %s", filename);
3808
3809 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3810 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3811 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3812 type ? type->super : "unknown",
3813 type ? type->type : "unknown");
3814 return (1);
3815 }
3816 #endif /* HAVE_PHP */
3817 #ifdef HAVE_PYTHON
3818 else if (!strcasecmp(type->type, "x-httpd-python"))
3819 {
3820 /*
3821 * "application/x-httpd-python" is a Python page.
3822 */
3823
3824 cupsdSetString(&con->command, CUPS_PYTHON);
3825
3826 if (options)
3827 cupsdSetStringf(&con->options, " %s %s", filename, options);
3828 else
3829 cupsdSetStringf(&con->options, " %s", filename);
3830
3831 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3832 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3833 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3834 type ? type->super : "unknown",
3835 type ? type->type : "unknown");
3836 return (1);
3837 }
3838 #endif /* HAVE_PYTHON */
3839
3840 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3841 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3842 "type=%s/%s) = 0", con, con->http.fd, filename, filestats,
3843 type ? type->super : "unknown",
3844 type ? type->type : "unknown");
3845 return (0);
3846 }
3847
3848
3849 /*
3850 * 'is_path_absolute()' - Is a path absolute and free of relative elements (i.e. "..").
3851 */
3852
3853 static int /* O - 0 if relative, 1 if absolute */
3854 is_path_absolute(const char *path) /* I - Input path */
3855 {
3856 /*
3857 * Check for a leading slash...
3858 */
3859
3860 if (path[0] != '/')
3861 return (0);
3862
3863 /*
3864 * Check for "/.." in the path...
3865 */
3866
3867 while ((path = strstr(path, "/..")) != NULL)
3868 {
3869 if (!path[3] || path[3] == '/')
3870 return (0);
3871
3872 path ++;
3873 }
3874
3875 /*
3876 * If we haven't found any relative paths, return 1 indicating an
3877 * absolute path...
3878 */
3879
3880 return (1);
3881 }
3882
3883
3884 #ifdef HAVE_SSL
3885 /*
3886 * 'make_certificate()' - Make a self-signed SSL/TLS certificate.
3887 */
3888
3889 static int /* O - 1 on success, 0 on failure */
3890 make_certificate(cupsd_client_t *con) /* I - Client connection */
3891 {
3892 #if defined(HAVE_LIBSSL) && defined(HAVE_WAITPID)
3893 int pid, /* Process ID of command */
3894 status; /* Status of command */
3895 char command[1024], /* Command */
3896 *argv[12], /* Command-line arguments */
3897 *envp[MAX_ENV + 1], /* Environment variables */
3898 home[1024], /* HOME environment variable */
3899 infofile[1024], /* Type-in information for cert */
3900 seedfile[1024]; /* Random number seed file */
3901 int envc, /* Number of environment variables */
3902 bytes; /* Bytes written */
3903 cups_file_t *fp; /* Seed/info file */
3904 int infofd; /* Info file descriptor */
3905
3906
3907 /*
3908 * Run the "openssl" command to seed the random number generator and
3909 * generate a self-signed certificate that is good for 10 years:
3910 *
3911 * openssl rand -rand seedfile 1
3912 *
3913 * openssl req -new -x509 -keyout ServerKey \
3914 * -out ServerCertificate -days 3650 -nodes
3915 *
3916 * The seeding step is crucial in ensuring that the openssl command
3917 * does not block on systems without sufficient entropy...
3918 */
3919
3920 if (!cupsFileFind("openssl", getenv("PATH"), 1, command, sizeof(command)))
3921 {
3922 cupsdLogMessage(CUPSD_LOG_ERROR,
3923 "No SSL certificate and openssl command not found!");
3924 return (0);
3925 }
3926
3927 if (access("/dev/urandom", 0))
3928 {
3929 /*
3930 * If the system doesn't provide /dev/urandom, then any random source
3931 * will probably be blocking-style, so generate some random data to
3932 * use as a seed for the certificate. Note that we have already
3933 * seeded the random number generator in cupsdInitCerts()...
3934 */
3935
3936 cupsdLogMessage(CUPSD_LOG_INFO,
3937 "Seeding the random number generator...");
3938
3939 snprintf(home, sizeof(home), "HOME=%s", TempDir);
3940
3941 /*
3942 * Write the seed file...
3943 */
3944
3945 if ((fp = cupsTempFile2(seedfile, sizeof(seedfile))) == NULL)
3946 {
3947 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to create seed file %s - %s",
3948 seedfile, strerror(errno));
3949 return (0);
3950 }
3951
3952 for (bytes = 0; bytes < 262144; bytes ++)
3953 cupsFilePutChar(fp, random());
3954
3955 cupsFileClose(fp);
3956
3957 /*
3958 * Run the openssl command to seed its random number generator...
3959 */
3960
3961 argv[0] = "openssl";
3962 argv[1] = "rand";
3963 argv[2] = "-rand";
3964 argv[3] = seedfile;
3965 argv[4] = "1";
3966 argv[5] = NULL;
3967
3968 envc = cupsdLoadEnv(envp, MAX_ENV);
3969 envp[envc++] = home;
3970 envp[envc] = NULL;
3971
3972 if (!cupsdStartProcess(command, argv, envp, -1, -1, -1, -1, -1, 1, NULL, 0,
3973 &pid))
3974 {
3975 unlink(seedfile);
3976 return (0);
3977 }
3978
3979 while (waitpid(pid, &status, 0) < 0)
3980 if (errno != EINTR)
3981 {
3982 status = 1;
3983 break;
3984 }
3985
3986 cupsdFinishProcess(pid, command, sizeof(command), NULL);
3987
3988 /*
3989 * Remove the seed file, as it is no longer needed...
3990 */
3991
3992 unlink(seedfile);
3993
3994 if (status)
3995 {
3996 if (WIFEXITED(status))
3997 cupsdLogMessage(CUPSD_LOG_ERROR,
3998 "Unable to seed random number generator - "
3999 "the openssl command stopped with status %d!",
4000 WEXITSTATUS(status));
4001 else
4002 cupsdLogMessage(CUPSD_LOG_ERROR,
4003 "Unable to seed random number generator - "
4004 "the openssl command crashed on signal %d!",
4005 WTERMSIG(status));
4006
4007 return (0);
4008 }
4009 }
4010
4011 /*
4012 * Create a file with the certificate information fields...
4013 *
4014 * Note: This assumes that the default questions are asked by the openssl
4015 * command...
4016 */
4017
4018 if ((fp = cupsTempFile2(infofile, sizeof(infofile))) == NULL)
4019 {
4020 cupsdLogMessage(CUPSD_LOG_ERROR,
4021 "Unable to create certificate information file %s - %s",
4022 infofile, strerror(errno));
4023 return (0);
4024 }
4025
4026 cupsFilePrintf(fp, ".\n.\n.\n%s\n.\n%s\n%s\n",
4027 ServerName, ServerName, ServerAdmin);
4028 cupsFileClose(fp);
4029
4030 cupsdLogMessage(CUPSD_LOG_INFO,
4031 "Generating SSL server key and certificate...");
4032
4033 argv[0] = "openssl";
4034 argv[1] = "req";
4035 argv[2] = "-new";
4036 argv[3] = "-x509";
4037 argv[4] = "-keyout";
4038 argv[5] = ServerKey;
4039 argv[6] = "-out";
4040 argv[7] = ServerCertificate;
4041 argv[8] = "-days";
4042 argv[9] = "3650";
4043 argv[10] = "-nodes";
4044 argv[11] = NULL;
4045
4046 cupsdLoadEnv(envp, MAX_ENV);
4047
4048 infofd = open(infofile, O_RDONLY);
4049
4050 if (!cupsdStartProcess(command, argv, envp, infofd, -1, -1, -1, -1, 1, NULL,
4051 0, &pid))
4052 {
4053 close(infofd);
4054 unlink(infofile);
4055 return (0);
4056 }
4057
4058 close(infofd);
4059 unlink(infofile);
4060
4061 while (waitpid(pid, &status, 0) < 0)
4062 if (errno != EINTR)
4063 {
4064 status = 1;
4065 break;
4066 }
4067
4068 cupsdFinishProcess(pid, command, sizeof(command), NULL);
4069
4070 if (status)
4071 {
4072 if (WIFEXITED(status))
4073 cupsdLogMessage(CUPSD_LOG_ERROR,
4074 "Unable to create SSL server key and certificate - "
4075 "the openssl command stopped with status %d!",
4076 WEXITSTATUS(status));
4077 else
4078 cupsdLogMessage(CUPSD_LOG_ERROR,
4079 "Unable to create SSL server key and certificate - "
4080 "the openssl command crashed on signal %d!",
4081 WTERMSIG(status));
4082 }
4083 else
4084 {
4085 cupsdLogMessage(CUPSD_LOG_INFO, "Created SSL server key file \"%s\"...",
4086 ServerKey);
4087 cupsdLogMessage(CUPSD_LOG_INFO,
4088 "Created SSL server certificate file \"%s\"...",
4089 ServerCertificate);
4090 }
4091
4092 return (!status);
4093
4094 #elif defined(HAVE_GNUTLS)
4095 gnutls_x509_crt crt; /* Self-signed certificate */
4096 gnutls_x509_privkey key; /* Encryption key */
4097 cups_lang_t *language; /* Default language info */
4098 cups_file_t *fp; /* Key/cert file */
4099 unsigned char buffer[8192]; /* Buffer for x509 data */
4100 size_t bytes; /* Number of bytes of data */
4101 unsigned char serial[4]; /* Serial number buffer */
4102 time_t curtime; /* Current time */
4103 int result; /* Result of GNU TLS calls */
4104
4105
4106 /*
4107 * Create the encryption key...
4108 */
4109
4110 cupsdLogMessage(CUPSD_LOG_INFO, "Generating SSL server key...");
4111
4112 gnutls_x509_privkey_init(&key);
4113 gnutls_x509_privkey_generate(key, GNUTLS_PK_RSA, 2048, 0);
4114
4115 /*
4116 * Save it...
4117 */
4118
4119 bytes = sizeof(buffer);
4120
4121 if ((result = gnutls_x509_privkey_export(key, GNUTLS_X509_FMT_PEM,
4122 buffer, &bytes)) < 0)
4123 {
4124 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to export SSL server key - %s",
4125 gnutls_strerror(result));
4126 gnutls_x509_privkey_deinit(key);
4127 return (0);
4128 }
4129 else if ((fp = cupsFileOpen(ServerKey, "w")) != NULL)
4130 {
4131 cupsFileWrite(fp, (char *)buffer, bytes);
4132 cupsFileClose(fp);
4133
4134 cupsdLogMessage(CUPSD_LOG_INFO, "Created SSL server key file \"%s\"...",
4135 ServerKey);
4136 }
4137 else
4138 {
4139 cupsdLogMessage(CUPSD_LOG_ERROR,
4140 "Unable to create SSL server key file \"%s\" - %s",
4141 ServerKey, strerror(errno));
4142 gnutls_x509_privkey_deinit(key);
4143 return (0);
4144 }
4145
4146 /*
4147 * Create the self-signed certificate...
4148 */
4149
4150 cupsdLogMessage(CUPSD_LOG_INFO, "Generating self-signed SSL certificate...");
4151
4152 language = cupsLangDefault();
4153 curtime = time(NULL);
4154 serial[0] = curtime >> 24;
4155 serial[1] = curtime >> 16;
4156 serial[2] = curtime >> 8;
4157 serial[3] = curtime;
4158
4159 gnutls_x509_crt_init(&crt);
4160 if (strlen(language->language) == 5)
4161 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0,
4162 language->language + 3, 2);
4163 else
4164 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0,
4165 "US", 2);
4166 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0,
4167 ServerName, strlen(ServerName));
4168 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATION_NAME, 0,
4169 ServerName, strlen(ServerName));
4170 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATIONAL_UNIT_NAME,
4171 0, "Unknown", 7);
4172 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_STATE_OR_PROVINCE_NAME, 0,
4173 "Unknown", 7);
4174 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_LOCALITY_NAME, 0,
4175 "Unknown", 7);
4176 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_PKCS9_EMAIL, 0,
4177 ServerAdmin, strlen(ServerAdmin));
4178 gnutls_x509_crt_set_key(crt, key);
4179 gnutls_x509_crt_set_serial(crt, serial, sizeof(serial));
4180 gnutls_x509_crt_set_activation_time(crt, curtime);
4181 gnutls_x509_crt_set_expiration_time(crt, curtime + 10 * 365 * 86400);
4182 gnutls_x509_crt_set_ca_status(crt, 0);
4183 gnutls_x509_crt_set_subject_alternative_name(crt, GNUTLS_SAN_DNSNAME,
4184 ServerName);
4185 gnutls_x509_crt_set_key_purpose_oid(crt, GNUTLS_KP_TLS_WWW_SERVER, 0);
4186 gnutls_x509_crt_set_key_usage(crt, GNUTLS_KEY_KEY_ENCIPHERMENT);
4187 gnutls_x509_crt_set_version(crt, 3);
4188
4189 bytes = sizeof(buffer);
4190 if (gnutls_x509_crt_get_key_id(crt, 0, buffer, &bytes) >= 0)
4191 gnutls_x509_crt_set_subject_key_id(crt, buffer, bytes);
4192
4193 gnutls_x509_crt_sign(crt, crt, key);
4194
4195 /*
4196 * Save it...
4197 */
4198
4199 bytes = sizeof(buffer);
4200 if ((result = gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM,
4201 buffer, &bytes)) < 0)
4202 cupsdLogMessage(CUPSD_LOG_ERROR,
4203 "Unable to export SSL server certificate - %s",
4204 gnutls_strerror(result));
4205 else if ((fp = cupsFileOpen(ServerCertificate, "w")) != NULL)
4206 {
4207 cupsFileWrite(fp, (char *)buffer, bytes);
4208 cupsFileClose(fp);
4209
4210 cupsdLogMessage(CUPSD_LOG_INFO,
4211 "Created SSL server certificate file \"%s\"...",
4212 ServerCertificate);
4213 }
4214 else
4215 cupsdLogMessage(CUPSD_LOG_ERROR,
4216 "Unable to create SSL server certificate file \"%s\" - %s",
4217 ServerCertificate, strerror(errno));
4218
4219 /*
4220 * Cleanup...
4221 */
4222
4223 gnutls_x509_crt_deinit(crt);
4224 gnutls_x509_privkey_deinit(key);
4225
4226 return (1);
4227
4228 #elif defined(HAVE_CDSASSL) && defined(HAVE_WAITPID)
4229 int pid, /* Process ID of command */
4230 status; /* Status of command */
4231 char command[1024], /* Command */
4232 *argv[4], /* Command-line arguments */
4233 *envp[MAX_ENV + 1], /* Environment variables */
4234 keychain[1024], /* Keychain argument */
4235 infofile[1024]; /* Type-in information for cert */
4236 cups_file_t *fp; /* Seed/info file */
4237 int infofd; /* Info file descriptor */
4238
4239
4240 /*
4241 * Run the "certtool" command to generate a self-signed certificate...
4242 */
4243
4244 if (!cupsFileFind("certtool", getenv("PATH"), 1, command, sizeof(command)))
4245 {
4246 cupsdLogMessage(CUPSD_LOG_ERROR,
4247 "No SSL certificate and certtool command not found!");
4248 return (0);
4249 }
4250
4251 /*
4252 * Create a file with the certificate information fields...
4253 *
4254 * Note: This assumes that the default questions are asked by the certtool
4255 * command...
4256 */
4257
4258 if ((fp = cupsTempFile2(infofile, sizeof(infofile))) == NULL)
4259 {
4260 cupsdLogMessage(CUPSD_LOG_ERROR,
4261 "Unable to create certificate information file %s - %s",
4262 infofile, strerror(errno));
4263 return (0);
4264 }
4265
4266 cupsFilePrintf(fp, "%s\nr\n\ny\nb\ns\ny\n%s\n\n\n\n\n%s\ny\n",
4267 con->servername, con->servername, ServerAdmin);
4268 cupsFileClose(fp);
4269
4270 cupsdLogMessage(CUPSD_LOG_INFO,
4271 "Generating SSL server key and certificate...");
4272
4273 snprintf(keychain, sizeof(keychain), "k=%s", ServerCertificate);
4274
4275 argv[0] = "certtool";
4276 argv[1] = "c";
4277 argv[2] = keychain;
4278 argv[3] = NULL;
4279
4280 cupsdLoadEnv(envp, MAX_ENV);
4281
4282 infofd = open(infofile, O_RDONLY);
4283
4284 if (!cupsdStartProcess(command, argv, envp, infofd, -1, -1, -1, -1, 1, NULL,
4285 0, &pid))
4286 {
4287 close(infofd);
4288 unlink(infofile);
4289 return (0);
4290 }
4291
4292 close(infofd);
4293 unlink(infofile);
4294
4295 while (waitpid(pid, &status, 0) < 0)
4296 if (errno != EINTR)
4297 {
4298 status = 1;
4299 break;
4300 }
4301
4302 cupsdFinishProcess(pid, command, sizeof(command), NULL);
4303
4304 if (status)
4305 {
4306 if (WIFEXITED(status))
4307 cupsdLogMessage(CUPSD_LOG_ERROR,
4308 "Unable to create SSL server key and certificate - "
4309 "the certtool command stopped with status %d!",
4310 WEXITSTATUS(status));
4311 else
4312 cupsdLogMessage(CUPSD_LOG_ERROR,
4313 "Unable to create SSL server key and certificate - "
4314 "the certtool command crashed on signal %d!",
4315 WTERMSIG(status));
4316 }
4317 else
4318 {
4319 cupsdLogMessage(CUPSD_LOG_INFO,
4320 "Created SSL server certificate file \"%s\"...",
4321 ServerCertificate);
4322 }
4323
4324 return (!status);
4325
4326 #else
4327 return (0);
4328 #endif /* HAVE_LIBSSL && HAVE_WAITPID */
4329 }
4330 #endif /* HAVE_SSL */
4331
4332
4333 /*
4334 * 'pipe_command()' - Pipe the output of a command to the remote client.
4335 */
4336
4337 static int /* O - Process ID */
4338 pipe_command(cupsd_client_t *con, /* I - Client connection */
4339 int infile, /* I - Standard input for command */
4340 int *outfile, /* O - Standard output for command */
4341 char *command, /* I - Command to run */
4342 char *options, /* I - Options for command */
4343 int root) /* I - Run as root? */
4344 {
4345 int i; /* Looping var */
4346 int pid; /* Process ID */
4347 char *commptr, /* Command string pointer */
4348 commch; /* Command string character */
4349 char *uriptr; /* URI string pointer */
4350 int fds[2]; /* Pipe FDs */
4351 int argc; /* Number of arguments */
4352 int envc; /* Number of environment variables */
4353 char argbuf[10240], /* Argument buffer */
4354 *argv[100], /* Argument strings */
4355 *envp[MAX_ENV + 20]; /* Environment variables */
4356 char auth_type[256], /* CUPSD_AUTH_TYPE environment variable */
4357 content_length[1024], /* CONTENT_LENGTH environment variable */
4358 content_type[1024], /* CONTENT_TYPE environment variable */
4359 http_cookie[32768], /* HTTP_COOKIE environment variable */
4360 http_referer[1024], /* HTTP_REFERER environment variable */
4361 http_user_agent[1024], /* HTTP_USER_AGENT environment variable */
4362 lang[1024], /* LANG environment variable */
4363 path_info[1024], /* PATH_INFO environment variable */
4364 remote_addr[1024], /* REMOTE_ADDR environment variable */
4365 remote_host[1024], /* REMOTE_HOST environment variable */
4366 remote_user[1024], /* REMOTE_USER environment variable */
4367 script_filename[1024], /* SCRIPT_FILENAME environment variable */
4368 script_name[1024], /* SCRIPT_NAME environment variable */
4369 server_name[1024], /* SERVER_NAME environment variable */
4370 server_port[1024]; /* SERVER_PORT environment variable */
4371 ipp_attribute_t *attr; /* attributes-natural-language attribute */
4372 #ifdef HAVE_GSSAPI
4373 krb5_ccache ccache = NULL; /* Kerberos credentials */
4374 # if defined(HAVE_KRB5_CC_NEW_UNIQUE) || defined(HAVE_HEIMDAL)
4375 char krb5ccname[1024]; /* KRB5CCNAME environment variable */
4376 # endif /* HAVE_KRB5_CC_NEW_UNIQUE || HAVE_HEIMDAL */
4377 #endif /* HAVE_GSSAPI */
4378
4379
4380 /*
4381 * Parse a copy of the options string, which is of the form:
4382 *
4383 * argument+argument+argument
4384 * ?argument+argument+argument
4385 * param=value&param=value
4386 * ?param=value&param=value
4387 * /name?argument+argument+argument
4388 * /name?param=value&param=value
4389 *
4390 * If the string contains an "=" character after the initial name,
4391 * then we treat it as a HTTP GET form request and make a copy of
4392 * the remaining string for the environment variable.
4393 *
4394 * The string is always parsed out as command-line arguments, to
4395 * be consistent with Apache...
4396 */
4397
4398 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4399 "pipe_command(con=%p(%d), infile=%d, outfile=%p, "
4400 "command=\"%s\", options=\"%s\", root=%d)",
4401 con, con->http.fd, infile, outfile, command,
4402 options ? options : "(null)", root);
4403
4404 argv[0] = command;
4405
4406 if (options)
4407 strlcpy(argbuf, options, sizeof(argbuf));
4408 else
4409 argbuf[0] = '\0';
4410
4411 if (argbuf[0] == '/')
4412 {
4413 /*
4414 * Found some trailing path information, set PATH_INFO...
4415 */
4416
4417 if ((commptr = strchr(argbuf, '?')) == NULL)
4418 commptr = argbuf + strlen(argbuf);
4419
4420 commch = *commptr;
4421 *commptr = '\0';
4422 snprintf(path_info, sizeof(path_info), "PATH_INFO=%s", argbuf);
4423 *commptr = commch;
4424 }
4425 else
4426 {
4427 commptr = argbuf;
4428 path_info[0] = '\0';
4429
4430 if (*commptr == ' ')
4431 commptr ++;
4432 }
4433
4434 if (*commptr == '?' && con->operation == HTTP_GET && !con->query_string)
4435 {
4436 commptr ++;
4437 cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", commptr);
4438 }
4439
4440 argc = 1;
4441
4442 if (*commptr)
4443 {
4444 argv[argc ++] = commptr;
4445
4446 for (; *commptr && argc < 99; commptr ++)
4447 {
4448 /*
4449 * Break arguments whenever we see a + or space...
4450 */
4451
4452 if (*commptr == ' ' || *commptr == '+')
4453 {
4454 while (*commptr == ' ' || *commptr == '+')
4455 *commptr++ = '\0';
4456
4457 /*
4458 * If we don't have a blank string, save it as another argument...
4459 */
4460
4461 if (*commptr)
4462 {
4463 argv[argc] = commptr;
4464 argc ++;
4465 }
4466 else
4467 break;
4468 }
4469 else if (*commptr == '%' && isxdigit(commptr[1] & 255) &&
4470 isxdigit(commptr[2] & 255))
4471 {
4472 /*
4473 * Convert the %xx notation to the individual character.
4474 */
4475
4476 if (commptr[1] >= '0' && commptr[1] <= '9')
4477 *commptr = (commptr[1] - '0') << 4;
4478 else
4479 *commptr = (tolower(commptr[1]) - 'a' + 10) << 4;
4480
4481 if (commptr[2] >= '0' && commptr[2] <= '9')
4482 *commptr |= commptr[2] - '0';
4483 else
4484 *commptr |= tolower(commptr[2]) - 'a' + 10;
4485
4486 _cups_strcpy(commptr + 1, commptr + 3);
4487
4488 /*
4489 * Check for a %00 and break if that is the case...
4490 */
4491
4492 if (!*commptr)
4493 break;
4494 }
4495 }
4496 }
4497
4498 argv[argc] = NULL;
4499
4500 /*
4501 * Setup the environment variables as needed...
4502 */
4503
4504 if (con->username[0])
4505 {
4506 snprintf(auth_type, sizeof(auth_type), "CUPSD_AUTH_TYPE=%s",
4507 httpGetField(HTTP(con), HTTP_FIELD_AUTHORIZATION));
4508
4509 if ((uriptr = strchr(auth_type + 10, ' ')) != NULL)
4510 *uriptr = '\0';
4511 }
4512 else
4513 auth_type[0] = '\0';
4514
4515 if (con->request &&
4516 (attr = ippFindAttribute(con->request, "attributes-natural-language",
4517 IPP_TAG_LANGUAGE)) != NULL)
4518 {
4519 switch (strlen(attr->values[0].string.text))
4520 {
4521 default :
4522 /*
4523 * This is an unknown or badly formatted language code; use
4524 * the POSIX locale...
4525 */
4526
4527 strcpy(lang, "LANG=C");
4528 break;
4529
4530 case 2 :
4531 /*
4532 * Just the language code (ll)...
4533 */
4534
4535 snprintf(lang, sizeof(lang), "LANG=%s.UTF8",
4536 attr->values[0].string.text);
4537 break;
4538
4539 case 5 :
4540 /*
4541 * Language and country code (ll-cc)...
4542 */
4543
4544 snprintf(lang, sizeof(lang), "LANG=%c%c_%c%c.UTF8",
4545 attr->values[0].string.text[0],
4546 attr->values[0].string.text[1],
4547 toupper(attr->values[0].string.text[3] & 255),
4548 toupper(attr->values[0].string.text[4] & 255));
4549 break;
4550 }
4551 }
4552 else if (con->language)
4553 snprintf(lang, sizeof(lang), "LANG=%s.UTF8", con->language->language);
4554 else
4555 strcpy(lang, "LANG=C");
4556
4557 strcpy(remote_addr, "REMOTE_ADDR=");
4558 httpAddrString(con->http.hostaddr, remote_addr + 12,
4559 sizeof(remote_addr) - 12);
4560
4561 snprintf(remote_host, sizeof(remote_host), "REMOTE_HOST=%s",
4562 con->http.hostname);
4563
4564 snprintf(script_name, sizeof(script_name), "SCRIPT_NAME=%s", con->uri);
4565 if ((uriptr = strchr(script_name, '?')) != NULL)
4566 *uriptr = '\0';
4567
4568 snprintf(script_filename, sizeof(script_filename), "SCRIPT_FILENAME=%s%s",
4569 DocumentRoot, script_name + 12);
4570
4571 sprintf(server_port, "SERVER_PORT=%d", con->serverport);
4572
4573 snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s",
4574 con->servername);
4575
4576 envc = cupsdLoadEnv(envp, (int)(sizeof(envp) / sizeof(envp[0])));
4577
4578 if (auth_type[0])
4579 envp[envc ++] = auth_type;
4580
4581 envp[envc ++] = lang;
4582 envp[envc ++] = "REDIRECT_STATUS=1";
4583 envp[envc ++] = "GATEWAY_INTERFACE=CGI/1.1";
4584 envp[envc ++] = server_name;
4585 envp[envc ++] = server_port;
4586 envp[envc ++] = remote_addr;
4587 envp[envc ++] = remote_host;
4588 envp[envc ++] = script_name;
4589 envp[envc ++] = script_filename;
4590
4591 if (path_info[0])
4592 envp[envc ++] = path_info;
4593
4594 if (con->username[0])
4595 {
4596 snprintf(remote_user, sizeof(remote_user), "REMOTE_USER=%s", con->username);
4597
4598 envp[envc ++] = remote_user;
4599
4600 /*
4601 * Save Kerberos credentials, if any...
4602 */
4603
4604 #ifdef HAVE_GSSAPI
4605 if (con->gss_have_creds)
4606 {
4607 # if !defined(HAVE_KRB5_CC_NEW_UNIQUE) && !defined(HAVE_HEIMDAL)
4608 cupsdLogMessage(CUPSD_LOG_INFO,
4609 "Sorry, your version of Kerberos does not support "
4610 "delegated credentials!");
4611
4612 # else
4613 krb5_error_code error; /* Kerberos error code */
4614 OM_uint32 major_status, /* Major status code */
4615 minor_status; /* Minor status code */
4616 krb5_principal principal; /* Kerberos principal */
4617
4618
4619 # ifdef __APPLE__
4620 /*
4621 * If the weak-linked GSSAPI/Kerberos library is not present, don't try
4622 * to use it...
4623 */
4624
4625 if (krb5_init_context != NULL)
4626 {
4627 # endif /* __APPLE__ */
4628
4629 if (!KerberosInitialized)
4630 {
4631 /*
4632 * Setup a Kerberos context for the scheduler to use...
4633 */
4634
4635 KerberosInitialized = 1;
4636
4637 if (krb5_init_context(&KerberosContext))
4638 {
4639 KerberosContext = NULL;
4640
4641 cupsdLogMessage(CUPSD_LOG_ERROR,
4642 "Unable to initialize Kerberos context");
4643 }
4644 }
4645
4646 /*
4647 * We MUST create a file-based cache because memory-based caches are
4648 * only valid for the current process/address space.
4649 *
4650 * Due to various bugs/features in different versions of Kerberos, we
4651 * need either the krb5_cc_new_unique() function or Heimdal's version
4652 * of krb5_cc_gen_new() to create a new FILE: credential cache that
4653 * can be passed to the backend. These functions create a temporary
4654 * file (typically in /tmp) containing the cached credentials, which
4655 * are removed when we have successfully printed a job.
4656 */
4657
4658 if (KerberosContext)
4659 {
4660 # ifdef HAVE_KRB5_CC_NEW_UNIQUE
4661 if ((error = krb5_cc_new_unique(KerberosContext, "FILE", NULL,
4662 &ccache)) != 0)
4663 # else /* HAVE_HEIMDAL */
4664 if ((error = krb5_cc_gen_new(KerberosContext, &krb5_fcc_ops,
4665 &ccache)) != 0)
4666 # endif /* HAVE_KRB5_CC_NEW_UNIQUE */
4667 {
4668 cupsdLogMessage(CUPSD_LOG_ERROR,
4669 "Unable to create new credentials cache (%d/%s)",
4670 error, strerror(errno));
4671 ccache = NULL;
4672 }
4673 else if ((error = krb5_parse_name(KerberosContext, con->username,
4674 &principal)) != 0)
4675 {
4676 cupsdLogMessage(CUPSD_LOG_ERROR,
4677 "Unable to parse kerberos username (%d/%s)", error,
4678 strerror(errno));
4679 krb5_cc_destroy(KerberosContext, ccache);
4680 ccache = NULL;
4681 }
4682 else if ((error = krb5_cc_initialize(KerberosContext, ccache,
4683 principal)))
4684 {
4685 cupsdLogMessage(CUPSD_LOG_ERROR,
4686 "Unable to initialize credentials cache (%d/%s)",
4687 error, strerror(errno));
4688 krb5_cc_destroy(KerberosContext, ccache);
4689 krb5_free_principal(KerberosContext, principal);
4690 ccache = NULL;
4691 }
4692 else
4693 {
4694 krb5_free_principal(KerberosContext, principal);
4695
4696 /*
4697 * Copy the user's credentials to the new cache file...
4698 */
4699
4700 major_status = gss_krb5_copy_ccache(&minor_status,
4701 con->gss_delegated_cred, ccache);
4702
4703 if (GSS_ERROR(major_status))
4704 {
4705 cupsdLogGSSMessage(CUPSD_LOG_ERROR, major_status, minor_status,
4706 "Unable to import client credentials cache");
4707 krb5_cc_destroy(KerberosContext, ccache);
4708 ccache = NULL;
4709 }
4710 else
4711 {
4712 /*
4713 * Add the KRB5CCNAME environment variable to the job so that the
4714 * backend can use the credentials when printing.
4715 */
4716
4717 snprintf(krb5ccname, sizeof(krb5ccname), "KRB5CCNAME=FILE:%s",
4718 krb5_cc_get_name(KerberosContext, ccache));
4719 envp[envc++] = krb5ccname;
4720
4721 if (!RunUser)
4722 chown(krb5_cc_get_name(KerberosContext, ccache), User, Group);
4723 }
4724 }
4725 }
4726 # ifdef __APPLE__
4727 }
4728 # endif /* __APPLE__ */
4729 # endif /* HAVE_KRB5_CC_NEW_UNIQUE || HAVE_HEIMDAL */
4730 }
4731 #endif /* HAVE_GSSAPI */
4732 }
4733
4734 if (con->http.version == HTTP_1_1)
4735 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.1";
4736 else if (con->http.version == HTTP_1_0)
4737 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.0";
4738 else
4739 envp[envc ++] = "SERVER_PROTOCOL=HTTP/0.9";
4740
4741 if (con->http.cookie)
4742 {
4743 snprintf(http_cookie, sizeof(http_cookie), "HTTP_COOKIE=%s",
4744 con->http.cookie);
4745 envp[envc ++] = http_cookie;
4746 }
4747
4748 if (con->http.fields[HTTP_FIELD_USER_AGENT][0])
4749 {
4750 snprintf(http_user_agent, sizeof(http_user_agent), "HTTP_USER_AGENT=%s",
4751 con->http.fields[HTTP_FIELD_USER_AGENT]);
4752 envp[envc ++] = http_user_agent;
4753 }
4754
4755 if (con->http.fields[HTTP_FIELD_REFERER][0])
4756 {
4757 snprintf(http_referer, sizeof(http_referer), "HTTP_REFERER=%s",
4758 con->http.fields[HTTP_FIELD_REFERER]);
4759 envp[envc ++] = http_referer;
4760 }
4761
4762 if (con->operation == HTTP_GET)
4763 {
4764 envp[envc ++] = "REQUEST_METHOD=GET";
4765
4766 if (con->query_string)
4767 {
4768 /*
4769 * Add GET form variables after ?...
4770 */
4771
4772 envp[envc ++] = con->query_string;
4773 }
4774 else
4775 envp[envc ++] = "QUERY_STRING=";
4776 }
4777 else
4778 {
4779 sprintf(content_length, "CONTENT_LENGTH=" CUPS_LLFMT,
4780 CUPS_LLCAST con->bytes);
4781 snprintf(content_type, sizeof(content_type), "CONTENT_TYPE=%s",
4782 con->http.fields[HTTP_FIELD_CONTENT_TYPE]);
4783
4784 envp[envc ++] = "REQUEST_METHOD=POST";
4785 envp[envc ++] = content_length;
4786 envp[envc ++] = content_type;
4787 }
4788
4789 /*
4790 * Tell the CGI if we are using encryption...
4791 */
4792
4793 if (con->http.tls)
4794 envp[envc ++] = "HTTPS=ON";
4795
4796 /*
4797 * Terminate the environment array...
4798 */
4799
4800 envp[envc] = NULL;
4801
4802 if (LogLevel == CUPSD_LOG_DEBUG2)
4803 {
4804 for (i = 0; i < argc; i ++)
4805 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4806 "pipe_command: argv[%d] = \"%s\"", i, argv[i]);
4807 for (i = 0; i < envc; i ++)
4808 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4809 "pipe_command: envp[%d] = \"%s\"", i, envp[i]);
4810 }
4811
4812 /*
4813 * Create a pipe for the output...
4814 */
4815
4816 if (cupsdOpenPipe(fds))
4817 {
4818 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to create pipes for CGI %s - %s",
4819 argv[0], strerror(errno));
4820 return (0);
4821 }
4822
4823 /*
4824 * Then execute the command...
4825 */
4826
4827 if (cupsdStartProcess(command, argv, envp, infile, fds[1], CGIPipes[1],
4828 -1, -1, root, DefaultProfile, 0, &pid) < 0)
4829 {
4830 /*
4831 * Error - can't fork!
4832 */
4833
4834 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to fork for CGI %s - %s", argv[0],
4835 strerror(errno));
4836
4837 cupsdClosePipe(fds);
4838 pid = 0;
4839 }
4840 else
4841 {
4842 /*
4843 * Fork successful - return the PID...
4844 */
4845
4846 if (con->username[0])
4847 #ifdef HAVE_GSSAPI
4848 cupsdAddCert(pid, con->username, ccache);
4849 #else
4850 cupsdAddCert(pid, con->username, NULL);
4851 #endif /* HAVE_GSSAPI */
4852
4853 cupsdLogMessage(CUPSD_LOG_DEBUG, "[CGI] %s started - PID = %d",
4854 command, pid);
4855
4856 *outfile = fds[0];
4857 close(fds[1]);
4858 }
4859
4860 return (pid);
4861 }
4862
4863
4864 /*
4865 * 'write_file()' - Send a file via HTTP.
4866 */
4867
4868 static int /* O - 0 on failure, 1 on success */
4869 write_file(cupsd_client_t *con, /* I - Client connection */
4870 http_status_t code, /* I - HTTP status */
4871 char *filename, /* I - Filename */
4872 char *type, /* I - File type */
4873 struct stat *filestats) /* O - File information */
4874 {
4875 con->file = open(filename, O_RDONLY);
4876
4877 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4878 "write_file(con=%p(%d), code=%d, filename=\"%s\" (%d), "
4879 "type=\"%s\", filestats=%p)", con, con->http.fd,
4880 code, filename, con->file, type ? type : "(null)", filestats);
4881
4882 if (con->file < 0)
4883 return (0);
4884
4885 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
4886
4887 con->pipe_pid = 0;
4888
4889 if (!cupsdSendHeader(con, code, type, CUPSD_AUTH_NONE))
4890 return (0);
4891
4892 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
4893 httpGetDateString(filestats->st_mtime)) < 0)
4894 return (0);
4895 if (httpPrintf(HTTP(con), "Content-Length: " CUPS_LLFMT "\r\n",
4896 CUPS_LLCAST filestats->st_size) < 0)
4897 return (0);
4898 if (httpPrintf(HTTP(con), "\r\n") < 0)
4899 return (0);
4900
4901 if (cupsdFlushHeader(con) < 0)
4902 return (0);
4903
4904 con->http.data_encoding = HTTP_ENCODE_LENGTH;
4905 con->http.data_remaining = filestats->st_size;
4906
4907 if (con->http.data_remaining <= INT_MAX)
4908 con->http._data_remaining = con->http.data_remaining;
4909 else
4910 con->http._data_remaining = INT_MAX;
4911
4912 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient,
4913 (cupsd_selfunc_t)cupsdWriteClient, con);
4914
4915 return (1);
4916 }
4917
4918
4919 /*
4920 * 'write_pipe()' - Flag that data is available on the CGI pipe.
4921 */
4922
4923 static void
4924 write_pipe(cupsd_client_t *con) /* I - Client connection */
4925 {
4926 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4927 "write_pipe(con=%p(%d)) CGI output on fd %d",
4928 con, con->http.fd, con->file);
4929
4930 con->file_ready = 1;
4931
4932 cupsdRemoveSelect(con->file);
4933 cupsdAddSelect(con->http.fd, NULL, (cupsd_selfunc_t)cupsdWriteClient, con);
4934 }
4935
4936
4937 /*
4938 * End of "$Id: client.c 7950 2008-09-17 00:21:59Z mike $".
4939 */
Unnamed repository; edit this file 'description' to name the repository.