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[thirdparty/cups.git] / scheduler / client.c
1 /*
2 * "$Id: client.c 5972 2006-09-19 20:44:07Z mike $"
3 *
4 * Client routines for the Common UNIX Printing System (CUPS) scheduler.
5 *
6 * Copyright 1997-2006 by Easy Software Products, all rights reserved.
7 *
8 * These coded instructions, statements, and computer programs are the
9 * property of Easy Software Products and are protected by Federal
10 * copyright law. Distribution and use rights are outlined in the file
11 * "LICENSE.txt" which should have been included with this file. If this
12 * file is missing or damaged please contact Easy Software Products
13 * at:
14 *
15 * Attn: CUPS Licensing Information
16 * Easy Software Products
17 * 44141 Airport View Drive, Suite 204
18 * Hollywood, Maryland 20636 USA
19 *
20 * Voice: (301) 373-9600
21 * EMail: cups-info@cups.org
22 * WWW: http://www.cups.org
23 *
24 * Contents:
25 *
26 * cupsdAcceptClient() - Accept a new client.
27 * cupsdCloseAllClients() - Close all remote clients immediately.
28 * cupsdCloseClient() - Close a remote client.
29 * cupsdFlushHeader() - Flush the header fields to the client.
30 * cupsdReadClient() - Read data from a client.
31 * cupsdSendCommand() - Send output from a command via HTTP.
32 * cupsdSendError() - Send an error message via HTTP.
33 * cupsdSendHeader() - Send an HTTP request.
34 * cupsdUpdateCGI() - Read status messages from CGI scripts and programs.
35 * cupsdWriteClient() - Write data to a client as needed.
36 * check_if_modified() - Decode an "If-Modified-Since" line.
37 * encrypt_client() - Enable encryption for the client...
38 * get_cdsa_server_certs() - Convert a keychain name into the CFArrayRef
39 * required by SSLSetCertificate.
40 * get_file() - Get a filename and state info.
41 * install_conf_file() - Install a configuration file.
42 * is_cgi() - Is the resource a CGI script/program?
43 * is_path_absolute() - Is a path absolute and free of relative elements.
44 * make_certificate() - Make a self-signed SSL/TLS certificate.
45 * pipe_command() - Pipe the output of a command to the remote client.
46 * write_file() - Send a file via HTTP.
47 */
48
49 /*
50 * Include necessary headers...
51 */
52
53 #include <cups/http-private.h>
54 #include "cupsd.h"
55
56 #ifdef HAVE_CDSASSL
57 # include <Security/Security.h>
58 # ifdef HAVE_SECBASEPRIV_H
59 # include <Security/SecBasePriv.h>
60 # else
61 extern const char *cssmErrorString(int error);
62 # endif /* HAVE_SECBASEPRIV_H */
63 #endif /* HAVE_CDSASSL */
64 #ifdef HAVE_GNUTLS
65 # include <gnutls/x509.h>
66 #endif /* HAVE_GNUTLS */
67
68
69 /*
70 * Local functions...
71 */
72
73 static int check_if_modified(cupsd_client_t *con,
74 struct stat *filestats);
75 #ifdef HAVE_SSL
76 static int encrypt_client(cupsd_client_t *con);
77 #endif /* HAVE_SSL */
78 #ifdef HAVE_CDSASSL
79 static CFArrayRef get_cdsa_server_certs(void);
80 #endif /* HAVE_CDSASSL */
81 static char *get_file(cupsd_client_t *con, struct stat *filestats,
82 char *filename, int len);
83 static http_status_t install_conf_file(cupsd_client_t *con);
84 static int is_cgi(cupsd_client_t *con, const char *filename,
85 struct stat *filestats, mime_type_t *type);
86 static int is_path_absolute(const char *path);
87 #ifdef HAVE_SSL
88 static int make_certificate(void);
89 #endif /* HAVE_SSL */
90 static int pipe_command(cupsd_client_t *con, int infile, int *outfile,
91 char *command, char *options, int root);
92 static int write_file(cupsd_client_t *con, http_status_t code,
93 char *filename, char *type,
94 struct stat *filestats);
95
96
97 /*
98 * 'cupsdAcceptClient()' - Accept a new client.
99 */
100
101 void
102 cupsdAcceptClient(cupsd_listener_t *lis)/* I - Listener socket */
103 {
104 int count; /* Count of connections on a host */
105 int val; /* Parameter value */
106 cupsd_client_t *con, /* New client pointer */
107 *tempcon; /* Temporary client pointer */
108 http_addrlist_t *addrlist, /* List of adddresses for host */
109 *addr; /* Current address */
110 socklen_t addrlen; /* Length of address */
111 char *hostname; /* Hostname for address */
112 http_addr_t temp; /* Temporary address variable */
113 static time_t last_dos = 0; /* Time of last DoS attack */
114
115
116 cupsdLogMessage(CUPSD_LOG_DEBUG2,
117 "cupsdAcceptClient(lis=%p) %d Clients = %d",
118 lis, lis->fd, cupsArrayCount(Clients));
119
120 /*
121 * Make sure we don't have a full set of clients already...
122 */
123
124 if (cupsArrayCount(Clients) == MaxClients)
125 return;
126
127 /*
128 * Get a pointer to the next available client...
129 */
130
131 if (!Clients)
132 Clients = cupsArrayNew(NULL, NULL);
133
134 if (!Clients)
135 return;
136
137 con = calloc(1, sizeof(cupsd_client_t));
138
139 con->http.activity = time(NULL);
140 con->file = -1;
141 con->http.hostaddr = &(con->clientaddr);
142
143 /*
144 * Accept the client and get the remote address...
145 */
146
147 addrlen = sizeof(http_addr_t);
148
149 if ((con->http.fd = accept(lis->fd, (struct sockaddr *)con->http.hostaddr,
150 &addrlen)) < 0)
151 {
152 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to accept client connection - %s.",
153 strerror(errno));
154 free(con);
155 return;
156 }
157
158 #ifdef AF_INET6
159 if (lis->address.addr.sa_family == AF_INET6)
160 {
161 /*
162 * Save the connected port number...
163 */
164
165 con->http.hostaddr->ipv6.sin6_port = lis->address.ipv6.sin6_port;
166
167 /*
168 * Convert IPv4 over IPv6 addresses (::ffff:n.n.n.n) to IPv4 forms we
169 * can more easily use...
170 */
171
172 if (con->http.hostaddr->ipv6.sin6_addr.s6_addr32[0] == 0 &&
173 con->http.hostaddr->ipv6.sin6_addr.s6_addr32[1] == 0 &&
174 ntohl(con->http.hostaddr->ipv6.sin6_addr.s6_addr32[2]) == 0xffff)
175 con->http.hostaddr->ipv6.sin6_addr.s6_addr32[2] = 0;
176 }
177 else
178 #endif /* AF_INET6 */
179 if (lis->address.addr.sa_family == AF_INET)
180 con->http.hostaddr->ipv4.sin_port = lis->address.ipv4.sin_port;
181
182 /*
183 * Check the number of clients on the same address...
184 */
185
186 for (count = 0, tempcon = (cupsd_client_t *)cupsArrayFirst(Clients);
187 tempcon;
188 tempcon = (cupsd_client_t *)cupsArrayNext(Clients))
189 if (httpAddrEqual(tempcon->http.hostaddr, con->http.hostaddr))
190 {
191 count ++;
192 if (count >= MaxClientsPerHost)
193 break;
194 }
195
196 if (count >= MaxClientsPerHost)
197 {
198 if ((time(NULL) - last_dos) >= 60)
199 {
200 last_dos = time(NULL);
201 cupsdLogMessage(CUPSD_LOG_WARN,
202 "Possible DoS attack - more than %d clients connecting "
203 "from %s!",
204 MaxClientsPerHost, tempcon->http.hostname);
205 }
206
207 #ifdef WIN32
208 closesocket(con->http.fd);
209 #else
210 close(con->http.fd);
211 #endif /* WIN32 */
212
213 free(con);
214 return;
215 }
216
217 /*
218 * Get the hostname or format the IP address as needed...
219 */
220
221 if (httpAddrLocalhost(con->http.hostaddr))
222 {
223 /*
224 * Map accesses from the loopback interface to "localhost"...
225 */
226
227 strlcpy(con->http.hostname, "localhost", sizeof(con->http.hostname));
228 hostname = con->http.hostname;
229 }
230 else
231 {
232 /*
233 * Map accesses from the same host to the server name.
234 */
235
236 for (addr = ServerAddrs; addr; addr = addr->next)
237 if (httpAddrEqual(con->http.hostaddr, &(addr->addr)))
238 break;
239
240 if (addr)
241 {
242 strlcpy(con->http.hostname, ServerName, sizeof(con->http.hostname));
243 hostname = con->http.hostname;
244 }
245 else if (HostNameLookups)
246 hostname = httpAddrLookup(con->http.hostaddr, con->http.hostname,
247 sizeof(con->http.hostname));
248 else
249 {
250 hostname = NULL;
251 httpAddrString(con->http.hostaddr, con->http.hostname,
252 sizeof(con->http.hostname));
253 }
254 }
255
256 if (hostname == NULL && HostNameLookups == 2)
257 {
258 /*
259 * Can't have an unresolved IP address with double-lookups enabled...
260 */
261
262 cupsdLogMessage(CUPSD_LOG_DEBUG2,
263 "cupsdAcceptClient: Closing connection %d...",
264 con->http.fd);
265
266 #ifdef WIN32
267 closesocket(con->http.fd);
268 #else
269 close(con->http.fd);
270 #endif /* WIN32 */
271
272 cupsdLogMessage(CUPSD_LOG_WARN,
273 "Name lookup failed - connection from %s closed!",
274 con->http.hostname);
275
276 free(con);
277 return;
278 }
279
280 if (HostNameLookups == 2)
281 {
282 /*
283 * Do double lookups as needed...
284 */
285
286 if ((addrlist = httpAddrGetList(con->http.hostname, AF_UNSPEC, NULL)) != NULL)
287 {
288 /*
289 * See if the hostname maps to the same IP address...
290 */
291
292 for (addr = addrlist; addr; addr = addr->next)
293 if (httpAddrEqual(con->http.hostaddr, &(addr->addr)))
294 break;
295 }
296 else
297 addr = NULL;
298
299 httpAddrFreeList(addrlist);
300
301 if (!addr)
302 {
303 /*
304 * Can't have a hostname that doesn't resolve to the same IP address
305 * with double-lookups enabled...
306 */
307
308 cupsdLogMessage(CUPSD_LOG_DEBUG2,
309 "cupsdAcceptClient: Closing connection %d...",
310 con->http.fd);
311
312 #ifdef WIN32
313 closesocket(con->http.fd);
314 #else
315 close(con->http.fd);
316 #endif /* WIN32 */
317
318 cupsdLogMessage(CUPSD_LOG_WARN,
319 "IP lookup failed - connection from %s closed!",
320 con->http.hostname);
321 free(con);
322 return;
323 }
324 }
325
326 #ifdef AF_INET6
327 if (con->http.hostaddr->addr.sa_family == AF_INET6)
328 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s:%d (IPv6)",
329 con->http.fd, con->http.hostname,
330 ntohs(con->http.hostaddr->ipv6.sin6_port));
331 else
332 #endif /* AF_INET6 */
333 #ifdef AF_LOCAL
334 if (con->http.hostaddr->addr.sa_family == AF_LOCAL)
335 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s (Domain)",
336 con->http.fd, con->http.hostname);
337 else
338 #endif /* AF_LOCAL */
339 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s:%d (IPv4)",
340 con->http.fd, con->http.hostname,
341 ntohs(con->http.hostaddr->ipv4.sin_port));
342
343 /*
344 * Get the local address the client connected to...
345 */
346
347 addrlen = sizeof(temp);
348 if (getsockname(con->http.fd, (struct sockaddr *)&temp, &addrlen))
349 {
350 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to get local address - %s",
351 strerror(errno));
352
353 strcpy(con->servername, "localhost");
354 con->serverport = LocalPort;
355 }
356 else
357 {
358 #ifdef AF_INET6
359 if (temp.addr.sa_family == AF_INET6)
360 {
361 httpAddrLookup(&temp, con->servername, sizeof(con->servername));
362 con->serverport = ntohs(lis->address.ipv6.sin6_port);
363 }
364 else
365 #endif /* AF_INET6 */
366 if (temp.addr.sa_family == AF_INET)
367 {
368 httpAddrLookup(&temp, con->servername, sizeof(con->servername));
369 con->serverport = ntohs(lis->address.ipv4.sin_port);
370 }
371 else
372 {
373 strcpy(con->servername, "localhost");
374 con->serverport = LocalPort;
375 }
376 }
377
378 cupsArrayAdd(Clients, con);
379
380 cupsdLogMessage(CUPSD_LOG_DEBUG2,
381 "cupsdAcceptClient: %d connected to server on %s:%d",
382 con->http.fd, con->servername, con->serverport);
383
384 /*
385 * Using TCP_NODELAY improves responsiveness, especially on systems
386 * with a slow loopback interface... Since we write large buffers
387 * when sending print files and requests, there shouldn't be any
388 * performance penalty for this...
389 */
390
391 val = 1;
392 setsockopt(con->http.fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
393
394 /*
395 * Close this file on all execs...
396 */
397
398 fcntl(con->http.fd, F_SETFD, fcntl(con->http.fd, F_GETFD) | FD_CLOEXEC);
399
400 /*
401 * Add the socket to the select() input mask.
402 */
403
404 cupsdLogMessage(CUPSD_LOG_DEBUG2,
405 "cupsdAcceptClient: Adding fd %d to InputSet...",
406 con->http.fd);
407 FD_SET(con->http.fd, InputSet);
408
409 /*
410 * Temporarily suspend accept()'s until we lose a client...
411 */
412
413 if (cupsArrayCount(Clients) == MaxClients)
414 cupsdPauseListening();
415
416 #ifdef HAVE_SSL
417 /*
418 * See if we are connecting on a secure port...
419 */
420
421 if (lis->encryption == HTTP_ENCRYPT_ALWAYS)
422 {
423 /*
424 * https connection; go secure...
425 */
426
427 con->http.encryption = HTTP_ENCRYPT_ALWAYS;
428
429 encrypt_client(con);
430 }
431 else
432 con->auto_ssl = 1;
433 #endif /* HAVE_SSL */
434 }
435
436
437 /*
438 * 'cupsdCloseAllClients()' - Close all remote clients immediately.
439 */
440
441 void
442 cupsdCloseAllClients(void)
443 {
444 cupsd_client_t *con; /* Current client */
445
446
447 for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
448 con;
449 con = (cupsd_client_t *)cupsArrayNext(Clients))
450 cupsdCloseClient(con);
451 }
452
453
454 /*
455 * 'cupsdCloseClient()' - Close a remote client.
456 */
457
458 int /* O - 1 if partial close, 0 if fully closed */
459 cupsdCloseClient(cupsd_client_t *con) /* I - Client to close */
460 {
461 int partial; /* Do partial close for SSL? */
462 #ifdef HAVE_LIBSSL
463 SSL_CTX *context; /* Context for encryption */
464 SSL *conn; /* Connection for encryption */
465 unsigned long error; /* Error code */
466 #elif defined(HAVE_GNUTLS)
467 http_tls_t *conn; /* TLS connection information */
468 int error; /* Error code */
469 gnutls_certificate_server_credentials *credentials;
470 /* TLS credentials */
471 # elif defined(HAVE_CDSASSL)
472 http_tls_t *conn; /* CDSA connection information */
473 #endif /* HAVE_LIBSSL */
474
475
476 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdCloseClient: %d", con->http.fd);
477
478 /*
479 * Flush pending writes before closing...
480 */
481
482 httpFlushWrite(HTTP(con));
483
484 partial = 0;
485
486 #ifdef HAVE_SSL
487 /*
488 * Shutdown encryption as needed...
489 */
490
491 if (con->http.tls)
492 {
493 partial = 1;
494
495 # ifdef HAVE_LIBSSL
496 conn = (SSL *)(con->http.tls);
497 context = SSL_get_SSL_CTX(conn);
498
499 switch (SSL_shutdown(conn))
500 {
501 case 1 :
502 cupsdLogMessage(CUPSD_LOG_INFO,
503 "cupsdCloseClient: SSL shutdown successful!");
504 break;
505 case -1 :
506 cupsdLogMessage(CUPSD_LOG_ERROR,
507 "cupsdCloseClient: Fatal error during SSL shutdown!");
508 default :
509 while ((error = ERR_get_error()) != 0)
510 cupsdLogMessage(CUPSD_LOG_ERROR, "cupsdCloseClient: %s",
511 ERR_error_string(error, NULL));
512 break;
513 }
514
515 SSL_CTX_free(context);
516 SSL_free(conn);
517
518 # elif defined(HAVE_GNUTLS)
519 conn = (http_tls_t *)(con->http.tls);
520 credentials = (gnutls_certificate_server_credentials *)(conn->credentials);
521
522 error = gnutls_bye(conn->session, GNUTLS_SHUT_WR);
523 switch (error)
524 {
525 case GNUTLS_E_SUCCESS:
526 cupsdLogMessage(CUPSD_LOG_INFO,
527 "cupsdCloseClient: SSL shutdown successful!");
528 break;
529 default:
530 cupsdLogMessage(CUPSD_LOG_ERROR,
531 "cupsdCloseClient: %s", gnutls_strerror(error));
532 break;
533 }
534
535 gnutls_deinit(conn->session);
536 gnutls_certificate_free_credentials(*credentials);
537 free(credentials);
538 free(conn);
539
540 # elif defined(HAVE_CDSASSL)
541 conn = (http_tls_t *)(con->http.tls);
542
543 while (SSLClose(conn->session) == errSSLWouldBlock)
544 usleep(1000);
545
546 SSLDisposeContext(conn->session);
547
548 if (conn->certsArray)
549 CFRelease(conn->certsArray);
550
551 free(conn);
552 # endif /* HAVE_LIBSSL */
553
554 con->http.tls = NULL;
555 }
556 #endif /* HAVE_SSL */
557
558 if (con->pipe_pid != 0)
559 {
560 /*
561 * Stop any CGI process...
562 */
563
564 cupsdLogMessage(CUPSD_LOG_DEBUG2,
565 "cupsdCloseClient: %d Killing process ID %d...",
566 con->http.fd, con->pipe_pid);
567 cupsdEndProcess(con->pipe_pid, 1);
568 con->pipe_pid = 0;
569 }
570
571 if (con->file >= 0)
572 {
573 if (FD_ISSET(con->file, InputSet))
574 {
575 cupsdLogMessage(CUPSD_LOG_DEBUG2,
576 "cupsdCloseClient: %d Removing fd %d from InputSet...",
577 con->http.fd, con->file);
578 FD_CLR(con->file, InputSet);
579 }
580
581 cupsdLogMessage(CUPSD_LOG_DEBUG2,
582 "cupsdCloseClient: %d Closing data file %d.",
583 con->http.fd, con->file);
584
585 close(con->file);
586 con->file = -1;
587 }
588
589 /*
590 * Close the socket and clear the file from the input set for select()...
591 */
592
593 if (con->http.fd > 0)
594 {
595 if (partial)
596 {
597 /*
598 * Only do a partial close so that the encrypted client gets everything.
599 */
600
601 cupsdLogMessage(CUPSD_LOG_DEBUG2,
602 "cupsdCloseClient: Removing fd %d from OutputSet...",
603 con->http.fd);
604 shutdown(con->http.fd, 0);
605 FD_CLR(con->http.fd, OutputSet);
606 }
607 else
608 {
609 /*
610 * Shut the socket down fully...
611 */
612
613 cupsdLogMessage(CUPSD_LOG_DEBUG2,
614 "cupsdCloseClient: Removing fd %d from InputSet and OutputSet...",
615 con->http.fd);
616 close(con->http.fd);
617 FD_CLR(con->http.fd, InputSet);
618 FD_CLR(con->http.fd, OutputSet);
619 con->http.fd = -1;
620 }
621 }
622
623 if (!partial)
624 {
625 /*
626 * Free memory...
627 */
628
629 if (con->http.input_set)
630 free(con->http.input_set);
631
632 httpClearCookie(HTTP(con));
633
634 cupsdClearString(&con->filename);
635 cupsdClearString(&con->command);
636 cupsdClearString(&con->options);
637
638 if (con->request)
639 {
640 ippDelete(con->request);
641 con->request = NULL;
642 }
643
644 if (con->response)
645 {
646 ippDelete(con->response);
647 con->response = NULL;
648 }
649
650 if (con->language)
651 {
652 cupsLangFree(con->language);
653 con->language = NULL;
654 }
655
656 /*
657 * Re-enable new client connections if we are going back under the
658 * limit...
659 */
660
661 if (cupsArrayCount(Clients) == MaxClients)
662 cupsdResumeListening();
663
664 /*
665 * Compact the list of clients as necessary...
666 */
667
668 cupsArrayRemove(Clients, con);
669
670 free(con);
671 }
672
673 return (partial);
674 }
675
676
677 /*
678 * 'cupsdFlushHeader()' - Flush the header fields to the client.
679 */
680
681 int /* I - Bytes written or -1 on error */
682 cupsdFlushHeader(cupsd_client_t *con) /* I - Client to flush to */
683 {
684 int bytes = httpFlushWrite(HTTP(con));
685
686 con->http.data_encoding = HTTP_ENCODE_LENGTH;
687
688 return (bytes);
689 }
690
691
692 /*
693 * 'cupsdReadClient()' - Read data from a client.
694 */
695
696 int /* O - 1 on success, 0 on error */
697 cupsdReadClient(cupsd_client_t *con) /* I - Client to read from */
698 {
699 char line[32768], /* Line from client... */
700 operation[64], /* Operation code from socket */
701 version[64], /* HTTP version number string */
702 locale[64], /* Locale */
703 *ptr; /* Pointer into strings */
704 int major, minor; /* HTTP version numbers */
705 http_status_t status; /* Transfer status */
706 ipp_state_t ipp_state; /* State of IPP transfer */
707 int bytes; /* Number of bytes to POST */
708 char *filename; /* Name of file for GET/HEAD */
709 char buf[1024]; /* Buffer for real filename */
710 struct stat filestats; /* File information */
711 mime_type_t *type; /* MIME type of file */
712 cupsd_printer_t *p; /* Printer */
713 static unsigned request_id = 0; /* Request ID for temp files */
714
715
716 status = HTTP_CONTINUE;
717
718 cupsdLogMessage(CUPSD_LOG_DEBUG2,
719 "cupsdReadClient: %d, used=%d, file=%d state=%d",
720 con->http.fd, con->http.used, con->file, con->http.state);
721
722 if (con->http.error)
723 {
724 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdReadClient: http error seen...");
725 return (cupsdCloseClient(con));
726 }
727
728 #ifdef HAVE_SSL
729 if (con->auto_ssl)
730 {
731 /*
732 * Automatically check for a SSL/TLS handshake...
733 */
734
735 con->auto_ssl = 0;
736
737 if (recv(con->http.fd, buf, 1, MSG_PEEK) == 1 &&
738 (!buf[0] || !strchr("DGHOPT", buf[0])))
739 {
740 /*
741 * Encrypt this connection...
742 */
743
744 cupsdLogMessage(CUPSD_LOG_DEBUG2,
745 "cupsdReadClient: Saw first byte %02X, auto-negotiating SSL/TLS session...",
746 buf[0] & 255);
747
748 encrypt_client(con);
749 return (1);
750 }
751 }
752 #endif /* HAVE_SSL */
753
754 switch (con->http.state)
755 {
756 case HTTP_WAITING :
757 /*
758 * See if we've received a request line...
759 */
760
761 if (httpGets(line, sizeof(line) - 1, HTTP(con)) == NULL)
762 {
763 cupsdLogMessage(CUPSD_LOG_DEBUG2,
764 "cupsdReadClient: httpGets returned EOF...");
765 return (cupsdCloseClient(con));
766 }
767
768 /*
769 * Ignore blank request lines...
770 */
771
772 if (line[0] == '\0')
773 break;
774
775 /*
776 * Clear other state variables...
777 */
778
779 httpClearFields(HTTP(con));
780
781 con->http.activity = time(NULL);
782 con->http.version = HTTP_1_0;
783 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
784 con->http.data_encoding = HTTP_ENCODE_LENGTH;
785 con->http.data_remaining = 0;
786 con->http._data_remaining = 0;
787 con->operation = HTTP_WAITING;
788 con->bytes = 0;
789 con->file = -1;
790 con->file_ready = 0;
791 con->pipe_pid = 0;
792 con->username[0] = '\0';
793 con->password[0] = '\0';
794 con->uri[0] = '\0';
795
796 cupsdClearString(&con->command);
797 cupsdClearString(&con->options);
798
799 if (con->language != NULL)
800 {
801 cupsLangFree(con->language);
802 con->language = NULL;
803 }
804
805 /*
806 * Grab the request line...
807 */
808
809 switch (sscanf(line, "%63s%1023s%63s", operation, con->uri, version))
810 {
811 case 1 :
812 cupsdLogMessage(CUPSD_LOG_ERROR,
813 "Bad request line \"%s\" from %s!", line,
814 con->http.hostname);
815 cupsdSendError(con, HTTP_BAD_REQUEST);
816 return (cupsdCloseClient(con));
817 case 2 :
818 con->http.version = HTTP_0_9;
819 break;
820 case 3 :
821 if (sscanf(version, "HTTP/%d.%d", &major, &minor) != 2)
822 {
823 cupsdLogMessage(CUPSD_LOG_ERROR,
824 "Bad request line \"%s\" from %s!", line,
825 con->http.hostname);
826 cupsdSendError(con, HTTP_BAD_REQUEST);
827 return (cupsdCloseClient(con));
828 }
829
830 if (major < 2)
831 {
832 con->http.version = (http_version_t)(major * 100 + minor);
833 if (con->http.version == HTTP_1_1 && KeepAlive)
834 con->http.keep_alive = HTTP_KEEPALIVE_ON;
835 else
836 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
837 }
838 else
839 {
840 cupsdSendError(con, HTTP_NOT_SUPPORTED);
841 return (cupsdCloseClient(con));
842 }
843 break;
844 }
845
846 /*
847 * Handle full URLs in the request line...
848 */
849
850 if (strcmp(con->uri, "*"))
851 {
852 char method[HTTP_MAX_URI], /* Method/scheme */
853 userpass[HTTP_MAX_URI], /* Username:password */
854 hostname[HTTP_MAX_URI], /* Hostname */
855 resource[HTTP_MAX_URI]; /* Resource path */
856 int port; /* Port number */
857
858
859 /*
860 * Separate the URI into its components...
861 */
862
863 httpSeparateURI(HTTP_URI_CODING_MOST, con->uri,
864 method, sizeof(method),
865 userpass, sizeof(userpass),
866 hostname, sizeof(hostname), &port,
867 resource, sizeof(resource));
868
869 /*
870 * Only allow URIs with the servername, localhost, or an IP
871 * address...
872 */
873
874 if (strcmp(method, "file") &&
875 strcasecmp(hostname, ServerName) &&
876 strcasecmp(hostname, "localhost") &&
877 !isdigit(hostname[0]))
878 {
879 /*
880 * Nope, we don't do proxies...
881 */
882
883 cupsdLogMessage(CUPSD_LOG_ERROR, "Bad URI \"%s\" in request!",
884 con->uri);
885 cupsdSendError(con, HTTP_METHOD_NOT_ALLOWED);
886 return (cupsdCloseClient(con));
887 }
888
889 /*
890 * Copy the resource portion back into the URI; both resource and
891 * con->uri are HTTP_MAX_URI bytes in size...
892 */
893
894 strcpy(con->uri, resource);
895 }
896
897 /*
898 * Process the request...
899 */
900
901 if (!strcmp(operation, "GET"))
902 con->http.state = HTTP_GET;
903 else if (!strcmp(operation, "PUT"))
904 con->http.state = HTTP_PUT;
905 else if (!strcmp(operation, "POST"))
906 con->http.state = HTTP_POST;
907 else if (!strcmp(operation, "DELETE"))
908 con->http.state = HTTP_DELETE;
909 else if (!strcmp(operation, "TRACE"))
910 con->http.state = HTTP_TRACE;
911 else if (!strcmp(operation, "OPTIONS"))
912 con->http.state = HTTP_OPTIONS;
913 else if (!strcmp(operation, "HEAD"))
914 con->http.state = HTTP_HEAD;
915 else
916 {
917 cupsdLogMessage(CUPSD_LOG_ERROR, "Bad operation \"%s\"!", operation);
918 cupsdSendError(con, HTTP_BAD_REQUEST);
919 return (cupsdCloseClient(con));
920 }
921
922 con->start = time(NULL);
923 con->operation = con->http.state;
924
925 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdReadClient: %d %s %s HTTP/%d.%d",
926 con->http.fd, operation, con->uri,
927 con->http.version / 100, con->http.version % 100);
928
929 con->http.status = HTTP_OK;
930
931 case HTTP_OPTIONS :
932 case HTTP_DELETE :
933 case HTTP_GET :
934 case HTTP_HEAD :
935 case HTTP_POST :
936 case HTTP_PUT :
937 case HTTP_TRACE :
938 /*
939 * Parse incoming parameters until the status changes...
940 */
941
942 status = httpUpdate(HTTP(con));
943
944 if (status != HTTP_OK && status != HTTP_CONTINUE)
945 {
946 cupsdSendError(con, HTTP_BAD_REQUEST);
947 return (cupsdCloseClient(con));
948 }
949 break;
950
951 default :
952 break; /* Anti-compiler-warning-code */
953 }
954
955 /*
956 * Handle new transfers...
957 */
958
959 if (status == HTTP_OK)
960 {
961 if (con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE][0])
962 {
963 /*
964 * Figure out the locale from the Accept-Language and Content-Type
965 * fields...
966 */
967
968 if ((ptr = strchr(con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], ',')) != NULL)
969 *ptr = '\0';
970
971 if ((ptr = strchr(con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], ';')) != NULL)
972 *ptr = '\0';
973
974 if ((ptr = strstr(con->http.fields[HTTP_FIELD_CONTENT_TYPE], "charset=")) != NULL)
975 {
976 /*
977 * Combine language and charset, and trim any extra params in the
978 * content-type.
979 */
980
981 snprintf(locale, sizeof(locale), "%s.%s",
982 con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], ptr + 8);
983
984 if ((ptr = strchr(locale, ',')) != NULL)
985 *ptr = '\0';
986 }
987 else
988 snprintf(locale, sizeof(locale), "%s.%s",
989 con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], DefaultCharset);
990
991 cupsdLogMessage(CUPSD_LOG_DEBUG,
992 "cupsdReadClient: %d Browser asked for language \"%s\"...",
993 con->http.fd, locale);
994
995 con->language = cupsLangGet(locale);
996 }
997 else
998 con->language = cupsLangGet(DefaultLocale);
999
1000 cupsdAuthorize(con);
1001
1002 if (!strncmp(con->http.fields[HTTP_FIELD_CONNECTION], "Keep-Alive", 10) &&
1003 KeepAlive)
1004 con->http.keep_alive = HTTP_KEEPALIVE_ON;
1005
1006 if (!con->http.fields[HTTP_FIELD_HOST][0] &&
1007 con->http.version >= HTTP_1_1)
1008 {
1009 /*
1010 * HTTP/1.1 and higher require the "Host:" field...
1011 */
1012
1013 if (!cupsdSendError(con, HTTP_BAD_REQUEST))
1014 return (cupsdCloseClient(con));
1015 }
1016 else if (con->operation == HTTP_OPTIONS)
1017 {
1018 /*
1019 * Do OPTIONS command...
1020 */
1021
1022 if (con->best && con->best->type != AUTH_NONE)
1023 {
1024 if (!cupsdSendHeader(con, HTTP_UNAUTHORIZED, NULL))
1025 return (cupsdCloseClient(con));
1026 }
1027
1028 if (!strcasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Upgrade") &&
1029 con->http.tls == NULL)
1030 {
1031 #ifdef HAVE_SSL
1032 /*
1033 * Do encryption stuff...
1034 */
1035
1036 if (!cupsdSendHeader(con, HTTP_SWITCHING_PROTOCOLS, NULL))
1037 return (cupsdCloseClient(con));
1038
1039 httpPrintf(HTTP(con), "Connection: Upgrade\r\n");
1040 httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n");
1041 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1042 httpPrintf(HTTP(con), "\r\n");
1043
1044 if (cupsdFlushHeader(con) < 0)
1045 return (cupsdCloseClient(con));
1046
1047 encrypt_client(con);
1048 #else
1049 if (!cupsdSendError(con, HTTP_NOT_IMPLEMENTED))
1050 return (cupsdCloseClient(con));
1051 #endif /* HAVE_SSL */
1052 }
1053
1054 if (!cupsdSendHeader(con, HTTP_OK, NULL))
1055 return (cupsdCloseClient(con));
1056
1057 httpPrintf(HTTP(con), "Allow: GET, HEAD, OPTIONS, POST, PUT\r\n");
1058 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1059 httpPrintf(HTTP(con), "\r\n");
1060
1061 if (cupsdFlushHeader(con) < 0)
1062 return (cupsdCloseClient(con));
1063 }
1064 else if (!is_path_absolute(con->uri))
1065 {
1066 /*
1067 * Protect against malicious users!
1068 */
1069
1070 if (!cupsdSendError(con, HTTP_FORBIDDEN))
1071 return (cupsdCloseClient(con));
1072 }
1073 else
1074 {
1075 if (!strcasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Upgrade") &&
1076 con->http.tls == NULL)
1077 {
1078 #ifdef HAVE_SSL
1079 /*
1080 * Do encryption stuff...
1081 */
1082
1083 if (!cupsdSendHeader(con, HTTP_SWITCHING_PROTOCOLS, NULL))
1084 return (cupsdCloseClient(con));
1085
1086 httpPrintf(HTTP(con), "Connection: Upgrade\r\n");
1087 httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n");
1088 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1089 httpPrintf(HTTP(con), "\r\n");
1090
1091 if (cupsdFlushHeader(con) < 0)
1092 return (cupsdCloseClient(con));
1093
1094 encrypt_client(con);
1095 #else
1096 if (!cupsdSendError(con, HTTP_NOT_IMPLEMENTED))
1097 return (cupsdCloseClient(con));
1098 #endif /* HAVE_SSL */
1099 }
1100
1101 if ((status = cupsdIsAuthorized(con, NULL)) != HTTP_OK)
1102 {
1103 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1104 "cupsdReadClient: Unauthorized request for %s...\n",
1105 con->uri);
1106 cupsdSendError(con, status);
1107 return (cupsdCloseClient(con));
1108 }
1109
1110 if (con->http.expect &&
1111 (con->operation == HTTP_POST || con->operation == HTTP_PUT))
1112 {
1113 if (con->http.expect == HTTP_CONTINUE)
1114 {
1115 /*
1116 * Send 100-continue header...
1117 */
1118
1119 if (!cupsdSendHeader(con, HTTP_CONTINUE, NULL))
1120 return (cupsdCloseClient(con));
1121 }
1122 else
1123 {
1124 /*
1125 * Send 417-expectation-failed header...
1126 */
1127
1128 if (!cupsdSendHeader(con, HTTP_EXPECTATION_FAILED, NULL))
1129 return (cupsdCloseClient(con));
1130
1131 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1132 httpPrintf(HTTP(con), "\r\n");
1133
1134 if (cupsdFlushHeader(con) < 0)
1135 return (cupsdCloseClient(con));
1136 }
1137 }
1138
1139 switch (con->http.state)
1140 {
1141 case HTTP_GET_SEND :
1142 if (!strncmp(con->uri, "/printers/", 10) &&
1143 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1144 {
1145 /*
1146 * Send PPD file - get the real printer name since printer
1147 * names are not case sensitive but filenames can be...
1148 */
1149
1150 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1151
1152 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1153 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1154 else
1155 {
1156 if (!cupsdSendError(con, HTTP_NOT_FOUND))
1157 return (cupsdCloseClient(con));
1158
1159 break;
1160 }
1161 }
1162
1163 if ((!strncmp(con->uri, "/admin", 6) &&
1164 strncmp(con->uri, "/admin/conf/", 12) &&
1165 strncmp(con->uri, "/admin/log/", 11)) ||
1166 !strncmp(con->uri, "/printers", 9) ||
1167 !strncmp(con->uri, "/classes", 8) ||
1168 !strncmp(con->uri, "/help", 5) ||
1169 !strncmp(con->uri, "/jobs", 5))
1170 {
1171 /*
1172 * Send CGI output...
1173 */
1174
1175 if (!strncmp(con->uri, "/admin", 6))
1176 {
1177 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1178 ServerBin);
1179
1180 cupsdSetString(&con->options, strchr(con->uri + 6, '?'));
1181 }
1182 else if (!strncmp(con->uri, "/printers", 9))
1183 {
1184 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1185 ServerBin);
1186
1187 if (con->uri[9] && con->uri[10])
1188 cupsdSetString(&con->options, con->uri + 9);
1189 else
1190 cupsdSetString(&con->options, NULL);
1191 }
1192 else if (!strncmp(con->uri, "/classes", 8))
1193 {
1194 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1195 ServerBin);
1196
1197 if (con->uri[8] && con->uri[9])
1198 cupsdSetString(&con->options, con->uri + 8);
1199 else
1200 cupsdSetString(&con->options, NULL);
1201 }
1202 else if (!strncmp(con->uri, "/jobs", 5))
1203 {
1204 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1205 ServerBin);
1206
1207 if (con->uri[5] && con->uri[6])
1208 cupsdSetString(&con->options, con->uri + 5);
1209 else
1210 cupsdSetString(&con->options, NULL);
1211 }
1212 else
1213 {
1214 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1215 ServerBin);
1216
1217 if (con->uri[5] && con->uri[6])
1218 cupsdSetString(&con->options, con->uri + 5);
1219 else
1220 cupsdSetString(&con->options, NULL);
1221 }
1222
1223 if (!cupsdSendCommand(con, con->command, con->options, 0))
1224 {
1225 if (!cupsdSendError(con, HTTP_NOT_FOUND))
1226 return (cupsdCloseClient(con));
1227 }
1228 else
1229 cupsdLogRequest(con, HTTP_OK);
1230
1231 if (con->http.version <= HTTP_1_0)
1232 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1233 }
1234 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1235 (strchr(con->uri + 12, '/') ||
1236 strlen(con->uri) == 12)) ||
1237 (!strncmp(con->uri, "/admin/log/", 11) &&
1238 (strchr(con->uri + 11, '/') ||
1239 strlen(con->uri) == 11)))
1240 {
1241 /*
1242 * GET can only be done to configuration files under
1243 * /admin/conf...
1244 */
1245
1246 if (!cupsdSendError(con, HTTP_FORBIDDEN))
1247 return (cupsdCloseClient(con));
1248
1249 break;
1250 }
1251 else
1252 {
1253 /*
1254 * Serve a file...
1255 */
1256
1257 if ((filename = get_file(con, &filestats, buf,
1258 sizeof(buf))) == NULL)
1259 {
1260 if (!cupsdSendError(con, HTTP_NOT_FOUND))
1261 return (cupsdCloseClient(con));
1262
1263 break;
1264 }
1265
1266 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1267
1268 if (is_cgi(con, filename, &filestats, type))
1269 {
1270 /*
1271 * Note: con->command and con->options were set by
1272 * is_cgi()...
1273 */
1274
1275 if (!cupsdSendCommand(con, con->command, con->options, 0))
1276 {
1277 if (!cupsdSendError(con, HTTP_NOT_FOUND))
1278 return (cupsdCloseClient(con));
1279 }
1280 else
1281 cupsdLogRequest(con, HTTP_OK);
1282
1283 if (con->http.version <= HTTP_1_0)
1284 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1285 break;
1286 }
1287
1288 if (!check_if_modified(con, &filestats))
1289 {
1290 if (!cupsdSendError(con, HTTP_NOT_MODIFIED))
1291 return (cupsdCloseClient(con));
1292 }
1293 else
1294 {
1295 if (type == NULL)
1296 strcpy(line, "text/plain");
1297 else
1298 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
1299
1300 if (!write_file(con, HTTP_OK, filename, line, &filestats))
1301 return (cupsdCloseClient(con));
1302 }
1303 }
1304 break;
1305
1306 case HTTP_POST_RECV :
1307 /*
1308 * See if the POST request includes a Content-Length field, and if
1309 * so check the length against any limits that are set...
1310 */
1311
1312 cupsdLogMessage(CUPSD_LOG_DEBUG2, "POST %s", con->uri);
1313 cupsdLogMessage(CUPSD_LOG_DEBUG2, "CONTENT_TYPE = %s",
1314 con->http.fields[HTTP_FIELD_CONTENT_TYPE]);
1315
1316 if (con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1317 MaxRequestSize > 0 &&
1318 con->http.data_remaining > MaxRequestSize)
1319 {
1320 /*
1321 * Request too large...
1322 */
1323
1324 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
1325 return (cupsdCloseClient(con));
1326
1327 break;
1328 }
1329 else if (con->http.data_remaining < 0)
1330 {
1331 /*
1332 * Negative content lengths are invalid!
1333 */
1334
1335 if (!cupsdSendError(con, HTTP_BAD_REQUEST))
1336 return (cupsdCloseClient(con));
1337
1338 break;
1339 }
1340
1341 /*
1342 * See what kind of POST request this is; for IPP requests the
1343 * content-type field will be "application/ipp"...
1344 */
1345
1346 if (!strcmp(con->http.fields[HTTP_FIELD_CONTENT_TYPE],
1347 "application/ipp"))
1348 con->request = ippNew();
1349 else if ((!strncmp(con->uri, "/admin", 6) &&
1350 strncmp(con->uri, "/admin/conf/", 12) &&
1351 strncmp(con->uri, "/admin/log/", 11)) ||
1352 !strncmp(con->uri, "/printers", 9) ||
1353 !strncmp(con->uri, "/classes", 8) ||
1354 !strncmp(con->uri, "/help", 5) ||
1355 !strncmp(con->uri, "/jobs", 5))
1356 {
1357 /*
1358 * CGI request...
1359 */
1360
1361 if (!strncmp(con->uri, "/admin", 6))
1362 {
1363 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1364 ServerBin);
1365
1366 cupsdSetString(&con->options, strchr(con->uri + 6, '?'));
1367 }
1368 else if (!strncmp(con->uri, "/printers", 9))
1369 {
1370 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1371 ServerBin);
1372
1373 if (con->uri[9] && con->uri[10])
1374 cupsdSetString(&con->options, con->uri + 9);
1375 else
1376 cupsdSetString(&con->options, NULL);
1377 }
1378 else if (!strncmp(con->uri, "/classes", 8))
1379 {
1380 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1381 ServerBin);
1382
1383 if (con->uri[8] && con->uri[9])
1384 cupsdSetString(&con->options, con->uri + 8);
1385 else
1386 cupsdSetString(&con->options, NULL);
1387 }
1388 else if (!strncmp(con->uri, "/jobs", 5))
1389 {
1390 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1391 ServerBin);
1392
1393 if (con->uri[5] && con->uri[6])
1394 cupsdSetString(&con->options, con->uri + 5);
1395 else
1396 cupsdSetString(&con->options, NULL);
1397 }
1398 else
1399 {
1400 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1401 ServerBin);
1402
1403 if (con->uri[5] && con->uri[6])
1404 cupsdSetString(&con->options, con->uri + 5);
1405 else
1406 cupsdSetString(&con->options, NULL);
1407 }
1408
1409 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1410 "cupsdReadClient: %d command=\"%s\", "
1411 "options = \"%s\"",
1412 con->http.fd, con->command,
1413 con->options ? con->options : "(null)");
1414
1415 if (con->http.version <= HTTP_1_0)
1416 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1417 }
1418 else
1419 {
1420 /*
1421 * POST to a file...
1422 */
1423
1424 if ((filename = get_file(con, &filestats, buf,
1425 sizeof(buf))) == NULL)
1426 {
1427 if (!cupsdSendError(con, HTTP_NOT_FOUND))
1428 return (cupsdCloseClient(con));
1429
1430 break;
1431 }
1432
1433 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1434
1435 if (!is_cgi(con, filename, &filestats, type))
1436 {
1437 /*
1438 * Only POST to CGI's...
1439 */
1440
1441 if (!cupsdSendError(con, HTTP_UNAUTHORIZED))
1442 return (cupsdCloseClient(con));
1443 }
1444 }
1445 break;
1446
1447 case HTTP_PUT_RECV :
1448 /*
1449 * Validate the resource name...
1450 */
1451
1452 if (strncmp(con->uri, "/admin/conf/", 12) ||
1453 strchr(con->uri + 12, '/') ||
1454 strlen(con->uri) == 12)
1455 {
1456 /*
1457 * PUT can only be done to configuration files under
1458 * /admin/conf...
1459 */
1460
1461 if (!cupsdSendError(con, HTTP_FORBIDDEN))
1462 return (cupsdCloseClient(con));
1463
1464 break;
1465 }
1466
1467 /*
1468 * See if the PUT request includes a Content-Length field, and if
1469 * so check the length against any limits that are set...
1470 */
1471
1472 cupsdLogMessage(CUPSD_LOG_DEBUG2, "PUT %s", con->uri);
1473 cupsdLogMessage(CUPSD_LOG_DEBUG2, "CONTENT_TYPE = %s",
1474 con->http.fields[HTTP_FIELD_CONTENT_TYPE]);
1475
1476 if (con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1477 MaxRequestSize > 0 &&
1478 con->http.data_remaining > MaxRequestSize)
1479 {
1480 /*
1481 * Request too large...
1482 */
1483
1484 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
1485 return (cupsdCloseClient(con));
1486
1487 break;
1488 }
1489 else if (con->http.data_remaining < 0)
1490 {
1491 /*
1492 * Negative content lengths are invalid!
1493 */
1494
1495 if (!cupsdSendError(con, HTTP_BAD_REQUEST))
1496 return (cupsdCloseClient(con));
1497
1498 break;
1499 }
1500
1501 /*
1502 * Open a temporary file to hold the request...
1503 */
1504
1505 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot,
1506 request_id ++);
1507 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
1508
1509 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1510 "cupsdReadClient: %d REQUEST %s=%d", con->http.fd,
1511 con->filename, con->file);
1512
1513 if (con->file < 0)
1514 {
1515 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
1516 return (cupsdCloseClient(con));
1517 }
1518
1519 fchmod(con->file, 0640);
1520 fchown(con->file, RunUser, Group);
1521 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
1522 break;
1523
1524 case HTTP_DELETE :
1525 case HTTP_TRACE :
1526 cupsdSendError(con, HTTP_NOT_IMPLEMENTED);
1527 return (cupsdCloseClient(con));
1528
1529 case HTTP_HEAD :
1530 if (!strncmp(con->uri, "/printers/", 10) &&
1531 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1532 {
1533 /*
1534 * Send PPD file - get the real printer name since printer
1535 * names are not case sensitive but filenames can be...
1536 */
1537
1538 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1539
1540 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1541 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1542 else
1543 {
1544 if (!cupsdSendError(con, HTTP_NOT_FOUND))
1545 return (cupsdCloseClient(con));
1546
1547 break;
1548 }
1549 }
1550
1551 if ((!strncmp(con->uri, "/admin", 6) &&
1552 strncmp(con->uri, "/admin/conf/", 12) &&
1553 strncmp(con->uri, "/admin/log/", 11)) ||
1554 !strncmp(con->uri, "/printers", 9) ||
1555 !strncmp(con->uri, "/classes", 8) ||
1556 !strncmp(con->uri, "/help", 5) ||
1557 !strncmp(con->uri, "/jobs", 5))
1558 {
1559 /*
1560 * CGI output...
1561 */
1562
1563 if (!cupsdSendHeader(con, HTTP_OK, "text/html"))
1564 return (cupsdCloseClient(con));
1565
1566 if (httpPrintf(HTTP(con), "\r\n") < 0)
1567 return (cupsdCloseClient(con));
1568
1569 if (cupsdFlushHeader(con) < 0)
1570 return (cupsdCloseClient(con));
1571
1572 cupsdLogRequest(con, HTTP_OK);
1573 }
1574 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1575 (strchr(con->uri + 12, '/') ||
1576 strlen(con->uri) == 12)) ||
1577 (!strncmp(con->uri, "/admin/log/", 11) &&
1578 (strchr(con->uri + 11, '/') ||
1579 strlen(con->uri) == 11)))
1580 {
1581 /*
1582 * HEAD can only be done to configuration files under
1583 * /admin/conf...
1584 */
1585
1586 if (!cupsdSendError(con, HTTP_FORBIDDEN))
1587 return (cupsdCloseClient(con));
1588
1589 break;
1590 }
1591 else if ((filename = get_file(con, &filestats, buf,
1592 sizeof(buf))) == NULL)
1593 {
1594 if (!cupsdSendHeader(con, HTTP_NOT_FOUND, "text/html"))
1595 return (cupsdCloseClient(con));
1596
1597 cupsdLogRequest(con, HTTP_NOT_FOUND);
1598 }
1599 else if (!check_if_modified(con, &filestats))
1600 {
1601 if (!cupsdSendError(con, HTTP_NOT_MODIFIED))
1602 return (cupsdCloseClient(con));
1603
1604 cupsdLogRequest(con, HTTP_NOT_MODIFIED);
1605 }
1606 else
1607 {
1608 /*
1609 * Serve a file...
1610 */
1611
1612 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1613 if (type == NULL)
1614 strcpy(line, "text/plain");
1615 else
1616 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
1617
1618 if (!cupsdSendHeader(con, HTTP_OK, line))
1619 return (cupsdCloseClient(con));
1620
1621 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
1622 httpGetDateString(filestats.st_mtime)) < 0)
1623 return (cupsdCloseClient(con));
1624
1625 if (httpPrintf(HTTP(con), "Content-Length: %lu\r\n",
1626 (unsigned long)filestats.st_size) < 0)
1627 return (cupsdCloseClient(con));
1628
1629 cupsdLogRequest(con, HTTP_OK);
1630 }
1631
1632 if (httpPrintf(HTTP(con), "\r\n") < 0)
1633 return (cupsdCloseClient(con));
1634
1635 if (cupsdFlushHeader(con) < 0)
1636 return (cupsdCloseClient(con));
1637
1638 con->http.state = HTTP_WAITING;
1639 break;
1640
1641 default :
1642 break; /* Anti-compiler-warning-code */
1643 }
1644 }
1645 }
1646
1647 /*
1648 * Handle any incoming data...
1649 */
1650
1651 switch (con->http.state)
1652 {
1653 case HTTP_PUT_RECV :
1654 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1655 "cupsdReadClient: %d con->data_encoding=HTTP_ENCODE_%s, "
1656 "con->data_remaining=" CUPS_LLFMT ", con->file=%d",
1657 con->http.fd,
1658 con->http.data_encoding == HTTP_ENCODE_CHUNKED ?
1659 "CHUNKED" : "LENGTH",
1660 CUPS_LLCAST con->http.data_remaining, con->file);
1661
1662 if ((bytes = httpRead2(HTTP(con), line, sizeof(line))) < 0)
1663 return (cupsdCloseClient(con));
1664 else if (bytes > 0)
1665 {
1666 con->bytes += bytes;
1667
1668 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1669 "cupsdReadClient: %d writing %d bytes to %d",
1670 con->http.fd, bytes, con->file);
1671
1672 if (write(con->file, line, bytes) < bytes)
1673 {
1674 cupsdLogMessage(CUPSD_LOG_ERROR,
1675 "cupsdReadClient: Unable to write %d bytes to %s: %s",
1676 bytes, con->filename, strerror(errno));
1677
1678 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1679 "cupsdReadClient: Closing data file %d...",
1680 con->file);
1681
1682 close(con->file);
1683 con->file = -1;
1684 unlink(con->filename);
1685 cupsdClearString(&con->filename);
1686
1687 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
1688 return (cupsdCloseClient(con));
1689 }
1690 }
1691
1692 if (con->http.state == HTTP_WAITING)
1693 {
1694 /*
1695 * End of file, see how big it is...
1696 */
1697
1698 fstat(con->file, &filestats);
1699
1700 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1701 "cupsdReadClient: %d Closing data file %d, size="
1702 CUPS_LLFMT ".",
1703 con->http.fd, con->file,
1704 CUPS_LLCAST filestats.st_size);
1705
1706 close(con->file);
1707 con->file = -1;
1708
1709 if (filestats.st_size > MaxRequestSize &&
1710 MaxRequestSize > 0)
1711 {
1712 /*
1713 * Request is too big; remove it and send an error...
1714 */
1715
1716 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1717 "cupsdReadClient: %d Removing temp file %s",
1718 con->http.fd, con->filename);
1719 unlink(con->filename);
1720 cupsdClearString(&con->filename);
1721
1722 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
1723 return (cupsdCloseClient(con));
1724 }
1725
1726 /*
1727 * Install the configuration file...
1728 */
1729
1730 status = install_conf_file(con);
1731
1732 /*
1733 * Return the status to the client...
1734 */
1735
1736 if (!cupsdSendError(con, status))
1737 return (cupsdCloseClient(con));
1738 }
1739 break;
1740
1741 case HTTP_POST_RECV :
1742 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1743 "cupsdReadClient: %d con->data_encoding=HTTP_ENCODE_"
1744 "%s, con->data_remaining=" CUPS_LLFMT ", con->file=%d",
1745 con->http.fd,
1746 con->http.data_encoding == HTTP_ENCODE_CHUNKED ?
1747 "CHUNKED" : "LENGTH",
1748 CUPS_LLCAST con->http.data_remaining, con->file);
1749
1750 if (con->request != NULL)
1751 {
1752 /*
1753 * Grab any request data from the connection...
1754 */
1755
1756 if ((ipp_state = ippRead(&(con->http), con->request)) == IPP_ERROR)
1757 {
1758 cupsdLogMessage(CUPSD_LOG_ERROR,
1759 "cupsdReadClient: %d IPP Read Error!",
1760 con->http.fd);
1761
1762 cupsdSendError(con, HTTP_BAD_REQUEST);
1763 return (cupsdCloseClient(con));
1764 }
1765 else if (ipp_state != IPP_DATA)
1766 {
1767 if (con->http.state == HTTP_POST_SEND)
1768 {
1769 cupsdSendError(con, HTTP_BAD_REQUEST);
1770 return (cupsdCloseClient(con));
1771 }
1772
1773 break;
1774 }
1775 else
1776 con->bytes += ippLength(con->request);
1777 }
1778
1779 if (con->file < 0 && con->http.state != HTTP_POST_SEND)
1780 {
1781 /*
1782 * Create a file as needed for the request data...
1783 */
1784
1785 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot, request_id ++);
1786 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
1787
1788 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdReadClient: %d REQUEST %s=%d", con->http.fd,
1789 con->filename, con->file);
1790
1791 if (con->file < 0)
1792 {
1793 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
1794 return (cupsdCloseClient(con));
1795 }
1796
1797 fchmod(con->file, 0640);
1798 fchown(con->file, RunUser, Group);
1799 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
1800 }
1801
1802 if (con->http.state != HTTP_POST_SEND)
1803 {
1804 if ((bytes = httpRead2(HTTP(con), line, sizeof(line))) < 0)
1805 return (cupsdCloseClient(con));
1806 else if (bytes > 0)
1807 {
1808 con->bytes += bytes;
1809
1810 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1811 "cupsdReadClient: %d writing %d bytes to %d",
1812 con->http.fd, bytes, con->file);
1813
1814 if (write(con->file, line, bytes) < bytes)
1815 {
1816 cupsdLogMessage(CUPSD_LOG_ERROR,
1817 "cupsdReadClient: Unable to write %d bytes to %s: %s",
1818 bytes, con->filename, strerror(errno));
1819
1820 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1821 "cupsdReadClient: Closing file %d...",
1822 con->file);
1823
1824 close(con->file);
1825 con->file = -1;
1826 unlink(con->filename);
1827 cupsdClearString(&con->filename);
1828
1829 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
1830 return (cupsdCloseClient(con));
1831 }
1832 }
1833 else if (con->http.state == HTTP_POST_RECV)
1834 return (1); /* ??? */
1835 else if (con->http.state != HTTP_POST_SEND)
1836 return (cupsdCloseClient(con));
1837 }
1838
1839 if (con->http.state == HTTP_POST_SEND)
1840 {
1841 if (con->file >= 0)
1842 {
1843 fstat(con->file, &filestats);
1844
1845 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1846 "cupsdReadClient: %d Closing data file %d, "
1847 "size=" CUPS_LLFMT ".",
1848 con->http.fd, con->file,
1849 CUPS_LLCAST filestats.st_size);
1850
1851 close(con->file);
1852 con->file = -1;
1853
1854 if (filestats.st_size > MaxRequestSize &&
1855 MaxRequestSize > 0)
1856 {
1857 /*
1858 * Request is too big; remove it and send an error...
1859 */
1860
1861 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1862 "cupsdReadClient: %d Removing temp file %s",
1863 con->http.fd, con->filename);
1864 unlink(con->filename);
1865 cupsdClearString(&con->filename);
1866
1867 if (con->request)
1868 {
1869 /*
1870 * Delete any IPP request data...
1871 */
1872
1873 ippDelete(con->request);
1874 con->request = NULL;
1875 }
1876
1877 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE))
1878 return (cupsdCloseClient(con));
1879 }
1880
1881 if (con->command)
1882 {
1883 if (!cupsdSendCommand(con, con->command, con->options, 0))
1884 {
1885 if (!cupsdSendError(con, HTTP_NOT_FOUND))
1886 return (cupsdCloseClient(con));
1887 }
1888 else
1889 cupsdLogRequest(con, HTTP_OK);
1890 }
1891 }
1892
1893 if (con->request)
1894 return (cupsdProcessIPPRequest(con));
1895 }
1896 break;
1897
1898 default :
1899 break; /* Anti-compiler-warning-code */
1900 }
1901
1902 if (!con->http.keep_alive && con->http.state == HTTP_WAITING)
1903 return (cupsdCloseClient(con));
1904 else
1905 return (1);
1906 }
1907
1908
1909 /*
1910 * 'cupsdSendCommand()' - Send output from a command via HTTP.
1911 */
1912
1913 int /* O - 1 on success, 0 on failure */
1914 cupsdSendCommand(
1915 cupsd_client_t *con, /* I - Client connection */
1916 char *command, /* I - Command to run */
1917 char *options, /* I - Command-line options */
1918 int root) /* I - Run as root? */
1919 {
1920 int fd; /* Standard input file descriptor */
1921
1922
1923 if (con->filename)
1924 {
1925 fd = open(con->filename, O_RDONLY);
1926
1927 if (fd < 0)
1928 {
1929 cupsdLogMessage(CUPSD_LOG_ERROR,
1930 "cupsdSendCommand: %d Unable to open \"%s\" for reading: %s",
1931 con->http.fd, con->filename ? con->filename : "/dev/null",
1932 strerror(errno));
1933 return (0);
1934 }
1935
1936 fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
1937 }
1938 else
1939 fd = -1;
1940
1941 con->pipe_pid = pipe_command(con, fd, &(con->file), command, options, root);
1942
1943 if (fd >= 0)
1944 close(fd);
1945
1946 cupsdLogMessage(CUPSD_LOG_INFO, "Started \"%s\" (pid=%d)", command,
1947 con->pipe_pid);
1948
1949 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdSendCommand: %d file=%d",
1950 con->http.fd, con->file);
1951
1952 if (con->pipe_pid == 0)
1953 return (0);
1954
1955 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
1956
1957 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1958 "cupsdSendCommand: Adding fd %d to InputSet...", con->file);
1959 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1960 "cupsdSendCommand: Adding fd %d to OutputSet...",
1961 con->http.fd);
1962
1963 FD_SET(con->file, InputSet);
1964 FD_SET(con->http.fd, OutputSet);
1965
1966 con->sent_header = 0;
1967 con->file_ready = 0;
1968 con->got_fields = 0;
1969 con->field_col = 0;
1970
1971 return (1);
1972 }
1973
1974
1975 /*
1976 * 'cupsdSendError()' - Send an error message via HTTP.
1977 */
1978
1979 int /* O - 1 if successful, 0 otherwise */
1980 cupsdSendError(cupsd_client_t *con, /* I - Connection */
1981 http_status_t code) /* I - Error code */
1982 {
1983 #ifdef HAVE_SSL
1984 /*
1985 * Force client to upgrade for authentication if that is how the
1986 * server is configured...
1987 */
1988
1989 if (code == HTTP_UNAUTHORIZED &&
1990 DefaultEncryption == HTTP_ENCRYPT_REQUIRED &&
1991 strcasecmp(con->http.hostname, "localhost") &&
1992 !con->http.tls)
1993 {
1994 cupsdLogMessage(CUPSD_LOG_DEBUG2,
1995 "cupsdSendError: Encryption before authentication!");
1996 code = HTTP_UPGRADE_REQUIRED;
1997 }
1998 #endif /* HAVE_SSL */
1999
2000 /*
2001 * Put the request in the access_log file...
2002 */
2003
2004 cupsdLogRequest(con, code);
2005
2006 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdSendError: %d code=%d (%s)",
2007 con->http.fd, code, httpStatus(code));
2008
2009 /*
2010 * To work around bugs in some proxies, don't use Keep-Alive for some
2011 * error messages...
2012 */
2013
2014 if (code >= HTTP_BAD_REQUEST)
2015 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
2016
2017 /*
2018 * Send an error message back to the client. If the error code is a
2019 * 400 or 500 series, make sure the message contains some text, too!
2020 */
2021
2022 if (!cupsdSendHeader(con, code, NULL))
2023 return (0);
2024
2025 #ifdef HAVE_SSL
2026 if (code == HTTP_UPGRADE_REQUIRED)
2027 if (httpPrintf(HTTP(con), "Connection: Upgrade\r\n") < 0)
2028 return (0);
2029
2030 if (httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n") < 0)
2031 return (0);
2032 #endif /* HAVE_SSL */
2033
2034 if ((con->http.version >= HTTP_1_1 && !con->http.keep_alive) ||
2035 (code >= HTTP_BAD_REQUEST && code != HTTP_UPGRADE_REQUIRED))
2036 {
2037 if (httpPrintf(HTTP(con), "Connection: close\r\n") < 0)
2038 return (0);
2039 }
2040
2041 if (code >= HTTP_BAD_REQUEST)
2042 {
2043 /*
2044 * Send a human-readable error message.
2045 */
2046
2047 char message[4096], /* Message for user */
2048 urltext[1024], /* URL redirection text */
2049 redirect[1024]; /* Redirection link */
2050 const char *text; /* Status-specific text */
2051
2052
2053 redirect[0] = '\0';
2054
2055 if (code == HTTP_UNAUTHORIZED)
2056 text = _cupsLangString(con->language,
2057 _("Enter your username and password or the "
2058 "root username and password to access this "
2059 "page."));
2060 else if (code == HTTP_UPGRADE_REQUIRED)
2061 {
2062 text = urltext;
2063
2064 snprintf(urltext, sizeof(urltext),
2065 _cupsLangString(con->language,
2066 _("You must access this page using the URL "
2067 "<A HREF=\"https://%s:%d%s\">"
2068 "https://%s:%d%s</A>.")),
2069 con->servername, con->serverport, con->uri,
2070 con->servername, con->serverport, con->uri);
2071
2072 snprintf(redirect, sizeof(redirect),
2073 "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"3;https://%s:%d%s\">\n",
2074 con->servername, con->serverport, con->uri);
2075 }
2076 else
2077 text = "";
2078
2079 snprintf(message, sizeof(message),
2080 "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" "
2081 "\"http://www.w3.org/TR/REC-html40/loose.dtd\">\n"
2082 "<HTML>\n"
2083 "<HEAD>\n"
2084 "\t<META HTTP-EQUIV=\"Content-Type\" "
2085 "CONTENT=\"text/html; charset=utf-8\">\n"
2086 "\t<TITLE>%d %s</TITLE>\n"
2087 "\t<LINK REL=\"STYLESHEET\" TYPE=\"text/css\" "
2088 "HREF=\"/cups.css\">\n"
2089 "%s"
2090 "</HEAD>\n"
2091 "<BODY>\n"
2092 "<H1>%d %s</H1>\n"
2093 "<P>%s</P>\n"
2094 "</BODY>\n"
2095 "</HTML>\n",
2096 code, httpStatus(code), redirect, code, httpStatus(code), text);
2097
2098 if (httpPrintf(HTTP(con), "Content-Type: text/html; charset=utf-8\r\n") < 0)
2099 return (0);
2100 if (httpPrintf(HTTP(con), "Content-Length: %d\r\n",
2101 (int)strlen(message)) < 0)
2102 return (0);
2103 if (httpPrintf(HTTP(con), "\r\n") < 0)
2104 return (0);
2105 if (httpPrintf(HTTP(con), "%s", message) < 0)
2106 return (0);
2107 }
2108 else if (httpPrintf(HTTP(con), "\r\n") < 0)
2109 return (0);
2110
2111 if (cupsdFlushHeader(con) < 0)
2112 return (0);
2113
2114 con->http.state = HTTP_WAITING;
2115
2116 return (1);
2117 }
2118
2119
2120 /*
2121 * 'cupsdSendHeader()' - Send an HTTP request.
2122 */
2123
2124 int /* O - 1 on success, 0 on failure */
2125 cupsdSendHeader(cupsd_client_t *con, /* I - Client to send to */
2126 http_status_t code, /* I - HTTP status code */
2127 char *type) /* I - MIME type of document */
2128 {
2129 /*
2130 * Send the HTTP status header...
2131 */
2132
2133 if (code == HTTP_CONTINUE)
2134 {
2135 /*
2136 * 100-continue doesn't send any headers...
2137 */
2138
2139 return (httpPrintf(HTTP(con), "HTTP/%d.%d 100 Continue\r\n\r\n",
2140 con->http.version / 100, con->http.version % 100) > 0);
2141 }
2142
2143 httpFlushWrite(HTTP(con));
2144
2145 con->http.data_encoding = HTTP_ENCODE_FIELDS;
2146
2147 if (httpPrintf(HTTP(con), "HTTP/%d.%d %d %s\r\n", con->http.version / 100,
2148 con->http.version % 100, code, httpStatus(code)) < 0)
2149 return (0);
2150 if (httpPrintf(HTTP(con), "Date: %s\r\n", httpGetDateString(time(NULL))) < 0)
2151 return (0);
2152 if (ServerHeader)
2153 if (httpPrintf(HTTP(con), "Server: %s\r\n", ServerHeader) < 0)
2154 return (0);
2155 if (con->http.keep_alive && con->http.version >= HTTP_1_0)
2156 {
2157 if (httpPrintf(HTTP(con), "Connection: Keep-Alive\r\n") < 0)
2158 return (0);
2159 if (httpPrintf(HTTP(con), "Keep-Alive: timeout=%d\r\n",
2160 KeepAliveTimeout) < 0)
2161 return (0);
2162 }
2163 if (code == HTTP_METHOD_NOT_ALLOWED)
2164 if (httpPrintf(HTTP(con), "Allow: GET, HEAD, OPTIONS, POST\r\n") < 0)
2165 return (0);
2166
2167 if (code == HTTP_UNAUTHORIZED)
2168 {
2169 int auth_type; /* Authentication type */
2170
2171
2172 if (!con->best || con->best->type == AUTH_NONE)
2173 auth_type = DefaultAuthType;
2174 else
2175 auth_type = con->best->type;
2176
2177 if (auth_type != AUTH_DIGEST)
2178 {
2179 if (httpPrintf(HTTP(con),
2180 "WWW-Authenticate: Basic realm=\"CUPS\"\r\n") < 0)
2181 return (0);
2182 }
2183 else
2184 {
2185 if (httpPrintf(HTTP(con),
2186 "WWW-Authenticate: Digest realm=\"CUPS\", nonce=\"%s\"\r\n",
2187 con->http.hostname) < 0)
2188 return (0);
2189 }
2190 }
2191
2192 if (con->language && strcmp(con->language->language, "C"))
2193 {
2194 if (httpPrintf(HTTP(con), "Content-Language: %s\r\n",
2195 con->language->language) < 0)
2196 return (0);
2197 }
2198
2199 if (type)
2200 {
2201 if (!strcmp(type, "text/html"))
2202 {
2203 if (httpPrintf(HTTP(con),
2204 "Content-Type: text/html; charset=utf-8\r\n") < 0)
2205 return (0);
2206 }
2207 else if (httpPrintf(HTTP(con), "Content-Type: %s\r\n", type) < 0)
2208 return (0);
2209 }
2210
2211 return (1);
2212 }
2213
2214
2215 /*
2216 * 'cupsdUpdateCGI()' - Read status messages from CGI scripts and programs.
2217 */
2218
2219 void
2220 cupsdUpdateCGI(void)
2221 {
2222 char *ptr, /* Pointer to end of line in buffer */
2223 message[1024]; /* Pointer to message text */
2224 int loglevel; /* Log level for message */
2225
2226
2227 while ((ptr = cupsdStatBufUpdate(CGIStatusBuffer, &loglevel,
2228 message, sizeof(message))) != NULL)
2229 if (!strchr(CGIStatusBuffer->buffer, '\n'))
2230 break;
2231
2232 if (ptr == NULL && !CGIStatusBuffer->bufused)
2233 {
2234 /*
2235 * Fatal error on pipe - should never happen!
2236 */
2237
2238 cupsdLogMessage(CUPSD_LOG_CRIT,
2239 "cupsdUpdateCGI: error reading from CGI error pipe - %s",
2240 strerror(errno));
2241 }
2242 }
2243
2244
2245 /*
2246 * 'cupsdWriteClient()' - Write data to a client as needed.
2247 */
2248
2249 int /* O - 1 if success, 0 if fail */
2250 cupsdWriteClient(cupsd_client_t *con) /* I - Client connection */
2251 {
2252 int bytes; /* Number of bytes written */
2253 char buf[16385]; /* Data buffer */
2254 char *bufptr; /* Pointer into buffer */
2255 ipp_state_t ipp_state; /* IPP state value */
2256
2257
2258 #ifdef DEBUG
2259 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2260 "cupsdWriteClient(con=%p) %d response=%p, file=%d "
2261 "pipe_pid=%d state=%d",
2262 con, con->http.fd, con->response, con->file, con->pipe_pid,
2263 con->http.state);
2264 #endif /* DEBUG */
2265
2266 if (con->http.state != HTTP_GET_SEND &&
2267 con->http.state != HTTP_POST_SEND)
2268 return (1);
2269
2270 if (con->response != NULL)
2271 {
2272 ipp_state = ippWrite(HTTP(con), con->response);
2273 bytes = ipp_state != IPP_ERROR && ipp_state != IPP_DATA;
2274 }
2275 else if ((bytes = read(con->file, buf, sizeof(buf) - 1)) > 0)
2276 {
2277 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2278 "cupsdWriteClient: Read %d bytes from file %d...",
2279 bytes, con->file);
2280
2281 if (con->pipe_pid && !con->got_fields)
2282 {
2283 /*
2284 * Inspect the data for Content-Type and other fields.
2285 */
2286
2287 buf[bytes] = '\0';
2288
2289 for (bufptr = buf; !con->got_fields && *bufptr; bufptr ++)
2290 if (*bufptr == '\n')
2291 {
2292 /*
2293 * Send line to client...
2294 */
2295
2296 if (bufptr > buf && bufptr[-1] == '\r')
2297 bufptr[-1] = '\0';
2298 *bufptr++ = '\0';
2299
2300 cupsdLogMessage(CUPSD_LOG_DEBUG2, "Script header: %s", buf);
2301
2302 if (!con->sent_header)
2303 {
2304 /*
2305 * Handle redirection and CGI status codes...
2306 */
2307
2308 if (!strncasecmp(buf, "Location:", 9))
2309 {
2310 cupsdSendHeader(con, HTTP_SEE_OTHER, NULL);
2311 con->sent_header = 2;
2312
2313 if (httpPrintf(HTTP(con), "Content-Length: 0\r\n") < 0)
2314 return (0);
2315 }
2316 else if (!strncasecmp(buf, "Status:", 7))
2317 {
2318 cupsdSendError(con, (http_status_t)atoi(buf + 7));
2319 con->sent_header = 2;
2320 }
2321 else
2322 {
2323 cupsdSendHeader(con, HTTP_OK, NULL);
2324 con->sent_header = 1;
2325
2326 if (con->http.version == HTTP_1_1)
2327 {
2328 if (httpPrintf(HTTP(con), "Transfer-Encoding: chunked\r\n") < 0)
2329 return (0);
2330 }
2331 }
2332 }
2333
2334 if (strncasecmp(buf, "Status:", 7))
2335 httpPrintf(HTTP(con), "%s\r\n", buf);
2336
2337 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdWriteClient: %d %s",
2338 con->http.fd, buf);
2339
2340 /*
2341 * Update buffer...
2342 */
2343
2344 bytes -= (bufptr - buf);
2345 memmove(buf, bufptr, bytes + 1);
2346 bufptr = buf - 1;
2347
2348 /*
2349 * See if the line was empty...
2350 */
2351
2352 if (con->field_col == 0)
2353 {
2354 con->got_fields = 1;
2355
2356 if (cupsdFlushHeader(con) < 0)
2357 {
2358 cupsdCloseClient(con);
2359 return (0);
2360 }
2361
2362 if (con->http.version == HTTP_1_1)
2363 con->http.data_encoding = HTTP_ENCODE_CHUNKED;
2364 }
2365 else
2366 con->field_col = 0;
2367 }
2368 else if (*bufptr != '\r')
2369 con->field_col ++;
2370
2371 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2372 "cupsdWriteClient: %d bytes=%d, got_fields=%d",
2373 con->http.fd, bytes, con->got_fields);
2374
2375 if (bytes > 0 && !con->got_fields)
2376 {
2377 /*
2378 * Remaining text needs to go out...
2379 */
2380
2381 httpPrintf(HTTP(con), "%s", buf);
2382
2383 con->http.activity = time(NULL);
2384 return (1);
2385 }
2386 else if (bytes == 0)
2387 con->http.activity = time(NULL);
2388 }
2389
2390 if (bytes > 0)
2391 {
2392 if (httpWrite2(HTTP(con), buf, bytes) < 0)
2393 {
2394 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2395 "cupsdWriteClient: %d Write of %d bytes failed!",
2396 con->http.fd, bytes);
2397
2398 cupsdCloseClient(con);
2399 return (0);
2400 }
2401
2402 con->bytes += bytes;
2403
2404 if (con->http.state == HTTP_WAITING)
2405 bytes = 0;
2406 }
2407 }
2408
2409 if (bytes <= 0)
2410 {
2411 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdWriteClient: %d bytes < 0",
2412 con->http.fd);
2413
2414 cupsdLogRequest(con, HTTP_OK);
2415
2416 httpFlushWrite(HTTP(con));
2417
2418 if (con->http.data_encoding == HTTP_ENCODE_CHUNKED && con->sent_header == 1)
2419 {
2420 if (httpWrite2(HTTP(con), "", 0) < 0)
2421 {
2422 cupsdCloseClient(con);
2423 return (0);
2424 }
2425 }
2426
2427 con->http.state = HTTP_WAITING;
2428
2429 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2430 "cupsdWriteClient: Removing fd %d from OutputSet...",
2431 con->http.fd);
2432
2433 FD_CLR(con->http.fd, OutputSet);
2434
2435 if (con->file >= 0)
2436 {
2437 if (FD_ISSET(con->file, InputSet))
2438 {
2439 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2440 "cupsdWriteClient: Removing fd %d from InputSet...",
2441 con->file);
2442 FD_CLR(con->file, InputSet);
2443 }
2444
2445 if (con->pipe_pid)
2446 cupsdEndProcess(con->pipe_pid, 0);
2447
2448 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2449 "cupsdWriteClient: %d Closing data file %d.",
2450 con->http.fd, con->file);
2451
2452 close(con->file);
2453 con->file = -1;
2454 con->pipe_pid = 0;
2455 }
2456
2457 if (con->filename)
2458 {
2459 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2460 "cupsdWriteClient: %d Removing temp file %s",
2461 con->http.fd, con->filename);
2462 unlink(con->filename);
2463 cupsdClearString(&con->filename);
2464 }
2465
2466 if (con->request != NULL)
2467 {
2468 ippDelete(con->request);
2469 con->request = NULL;
2470 }
2471
2472 if (con->response != NULL)
2473 {
2474 ippDelete(con->response);
2475 con->response = NULL;
2476 }
2477
2478 cupsdClearString(&con->command);
2479 cupsdClearString(&con->options);
2480
2481 if (!con->http.keep_alive)
2482 {
2483 cupsdCloseClient(con);
2484 return (0);
2485 }
2486 }
2487 else
2488 {
2489 con->file_ready = 0;
2490
2491 if (con->pipe_pid && !FD_ISSET(con->file, InputSet))
2492 {
2493 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2494 "cupsdWriteClient: Adding fd %d to InputSet...",
2495 con->file);
2496 FD_SET(con->file, InputSet);
2497 }
2498 }
2499
2500 con->http.activity = time(NULL);
2501
2502 return (1);
2503 }
2504
2505
2506 /*
2507 * 'check_if_modified()' - Decode an "If-Modified-Since" line.
2508 */
2509
2510 static int /* O - 1 if modified since */
2511 check_if_modified(
2512 cupsd_client_t *con, /* I - Client connection */
2513 struct stat *filestats) /* I - File information */
2514 {
2515 char *ptr; /* Pointer into field */
2516 time_t date; /* Time/date value */
2517 off_t size; /* Size/length value */
2518
2519
2520 size = 0;
2521 date = 0;
2522 ptr = con->http.fields[HTTP_FIELD_IF_MODIFIED_SINCE];
2523
2524 if (*ptr == '\0')
2525 return (1);
2526
2527 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2528 "check_if_modified: %d If-Modified-Since=\"%s\"",
2529 con->http.fd, ptr);
2530
2531 while (*ptr != '\0')
2532 {
2533 while (isspace(*ptr) || *ptr == ';')
2534 ptr ++;
2535
2536 if (strncasecmp(ptr, "length=", 7) == 0)
2537 {
2538 ptr += 7;
2539 size = strtoll(ptr, NULL, 10);
2540
2541 while (isdigit(*ptr))
2542 ptr ++;
2543 }
2544 else if (isalpha(*ptr))
2545 {
2546 date = httpGetDateTime(ptr);
2547 while (*ptr != '\0' && *ptr != ';')
2548 ptr ++;
2549 }
2550 else
2551 ptr ++;
2552 }
2553
2554 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2555 "check_if_modified: %d sizes=" CUPS_LLFMT ","
2556 CUPS_LLFMT " dates=%d,%d",
2557 con->http.fd, CUPS_LLCAST size,
2558 CUPS_LLCAST filestats->st_size, (int)date,
2559 (int)filestats->st_mtime);
2560
2561 return ((size != filestats->st_size && size != 0) ||
2562 (date < filestats->st_mtime && date != 0) ||
2563 (size == 0 && date == 0));
2564 }
2565
2566
2567 #ifdef HAVE_SSL
2568 /*
2569 * 'encrypt_client()' - Enable encryption for the client...
2570 */
2571
2572 static int /* O - 1 on success, 0 on error */
2573 encrypt_client(cupsd_client_t *con) /* I - Client to encrypt */
2574 {
2575 # ifdef HAVE_LIBSSL
2576 SSL_CTX *context; /* Context for encryption */
2577 SSL *conn; /* Connection for encryption */
2578 unsigned long error; /* Error code */
2579
2580
2581 /*
2582 * Verify that we have a certificate...
2583 */
2584
2585 if (access(ServerKey, 0) || access(ServerCertificate, 0))
2586 {
2587 /*
2588 * Nope, make a self-signed certificate...
2589 */
2590
2591 if (!make_certificate())
2592 return (0);
2593 }
2594
2595 /*
2596 * Create the SSL context and accept the connection...
2597 */
2598
2599 context = SSL_CTX_new(SSLv23_server_method());
2600
2601 SSL_CTX_set_options(context, SSL_OP_NO_SSLv2); /* Only use SSLv3 or TLS */
2602 SSL_CTX_use_PrivateKey_file(context, ServerKey, SSL_FILETYPE_PEM);
2603 SSL_CTX_use_certificate_file(context, ServerCertificate, SSL_FILETYPE_PEM);
2604
2605 conn = SSL_new(context);
2606
2607 SSL_set_fd(conn, con->http.fd);
2608 if (SSL_accept(conn) != 1)
2609 {
2610 cupsdLogMessage(CUPSD_LOG_ERROR,
2611 "encrypt_client: Unable to encrypt connection from %s!",
2612 con->http.hostname);
2613
2614 while ((error = ERR_get_error()) != 0)
2615 cupsdLogMessage(CUPSD_LOG_ERROR, "encrypt_client: %s",
2616 ERR_error_string(error, NULL));
2617
2618 SSL_CTX_free(context);
2619 SSL_free(conn);
2620 return (0);
2621 }
2622
2623 cupsdLogMessage(CUPSD_LOG_DEBUG,
2624 "encrypt_client: %d Connection from %s now encrypted.",
2625 con->http.fd, con->http.hostname);
2626
2627 con->http.tls = conn;
2628 return (1);
2629
2630 # elif defined(HAVE_GNUTLS)
2631 http_tls_t *conn; /* TLS session object */
2632 int error; /* Error code */
2633 gnutls_certificate_server_credentials *credentials;
2634 /* TLS credentials */
2635
2636
2637 /*
2638 * Verify that we have a certificate...
2639 */
2640
2641 if (access(ServerKey, 0) || access(ServerCertificate, 0))
2642 {
2643 /*
2644 * Nope, make a self-signed certificate...
2645 */
2646
2647 if (!make_certificate())
2648 return (0);
2649 }
2650
2651 /*
2652 * Create the SSL object and perform the SSL handshake...
2653 */
2654
2655 conn = (http_tls_t *)malloc(sizeof(http_tls_t));
2656
2657 if (conn == NULL)
2658 return (0);
2659
2660 credentials = (gnutls_certificate_server_credentials *)
2661 malloc(sizeof(gnutls_certificate_server_credentials));
2662 if (credentials == NULL)
2663 {
2664 cupsdLogMessage(CUPSD_LOG_ERROR,
2665 "encrypt_client: Unable to encrypt connection from %s!",
2666 con->http.hostname);
2667 cupsdLogMessage(CUPSD_LOG_ERROR, "encrypt_client: %s", strerror(errno));
2668
2669 free(conn);
2670 return (0);
2671 }
2672
2673 gnutls_certificate_allocate_credentials(credentials);
2674 gnutls_certificate_set_x509_key_file(*credentials, ServerCertificate,
2675 ServerKey, GNUTLS_X509_FMT_PEM);
2676
2677 gnutls_init(&(conn->session), GNUTLS_SERVER);
2678 gnutls_set_default_priority(conn->session);
2679 gnutls_credentials_set(conn->session, GNUTLS_CRD_CERTIFICATE, *credentials);
2680 gnutls_transport_set_ptr(conn->session,
2681 (gnutls_transport_ptr)((long)con->http.fd));
2682
2683 error = gnutls_handshake(conn->session);
2684
2685 if (error != GNUTLS_E_SUCCESS)
2686 {
2687 cupsdLogMessage(CUPSD_LOG_ERROR,
2688 "encrypt_client: Unable to encrypt connection from %s!",
2689 con->http.hostname);
2690 cupsdLogMessage(CUPSD_LOG_ERROR, "encrypt_client: %s",
2691 gnutls_strerror(error));
2692
2693 gnutls_deinit(conn->session);
2694 gnutls_certificate_free_credentials(*credentials);
2695 free(conn);
2696 free(credentials);
2697 return (0);
2698 }
2699
2700 cupsdLogMessage(CUPSD_LOG_DEBUG,
2701 "encrypt_client: %d Connection from %s now encrypted.",
2702 con->http.fd, con->http.hostname);
2703
2704 conn->credentials = credentials;
2705 con->http.tls = conn;
2706 return (1);
2707
2708 # elif defined(HAVE_CDSASSL)
2709 OSStatus error; /* Error code */
2710 http_tls_t *conn; /* CDSA connection information */
2711 cdsa_conn_ref_t u; /* Connection reference union */
2712
2713
2714 if ((conn = (http_tls_t *)malloc(sizeof(http_tls_t))) == NULL)
2715 return (0);
2716
2717 error = 0;
2718 conn->session = NULL;
2719 conn->certsArray = get_cdsa_server_certs();
2720
2721 if (!conn->certsArray)
2722 {
2723 /*
2724 * No keychain (yet), make a self-signed certificate...
2725 */
2726
2727 if (make_certificate())
2728 conn->certsArray = get_cdsa_server_certs();
2729 }
2730
2731 if (!conn->certsArray)
2732 {
2733 cupsdLogMessage(CUPSD_LOG_ERROR,
2734 "EncryptClient: Could not find signing key in keychain "
2735 "\"%s\"", ServerCertificate);
2736 error = errSSLBadCert; /* errSSLBadConfiguration is a better choice, but not available on 10.2.x */
2737 }
2738
2739 if (!error)
2740 error = SSLNewContext(true, &conn->session);
2741
2742 if (!error)
2743 error = SSLSetIOFuncs(conn->session, _httpReadCDSA, _httpWriteCDSA);
2744
2745 if (!error)
2746 error = SSLSetProtocolVersionEnabled(conn->session, kSSLProtocol2, false);
2747
2748 if (!error)
2749 {
2750 /*
2751 * Use a union to resolve warnings about int/pointer size mismatches...
2752 */
2753
2754 u.connection = NULL;
2755 u.sock = con->http.fd;
2756 error = SSLSetConnection(conn->session, u.connection);
2757 }
2758
2759 if (!error)
2760 error = SSLSetAllowsExpiredCerts(conn->session, true);
2761
2762 if (!error)
2763 error = SSLSetAllowsAnyRoot(conn->session, true);
2764
2765 if (!error)
2766 error = SSLSetCertificate(conn->session, conn->certsArray);
2767
2768 if (!error)
2769 {
2770 /*
2771 * Perform SSL/TLS handshake
2772 */
2773
2774 while ((error = SSLHandshake(conn->session)) == errSSLWouldBlock)
2775 usleep(1000);
2776 }
2777
2778 if (error)
2779 {
2780 cupsdLogMessage(CUPSD_LOG_ERROR,
2781 "encrypt_client: Unable to encrypt connection from %s!",
2782 con->http.hostname);
2783
2784 cupsdLogMessage(CUPSD_LOG_ERROR, "encrypt_client: %s (%d)",
2785 cssmErrorString(error), (int)error);
2786
2787 con->http.error = error;
2788 con->http.status = HTTP_ERROR;
2789
2790 if (conn->session)
2791 SSLDisposeContext(conn->session);
2792
2793 if (conn->certsArray)
2794 CFRelease(conn->certsArray);
2795
2796 free(conn);
2797
2798 return (0);
2799 }
2800
2801 cupsdLogMessage(CUPSD_LOG_DEBUG,
2802 "encrypt_client: %d Connection from %s now encrypted.",
2803 con->http.fd, con->http.hostname);
2804
2805 con->http.tls = conn;
2806 return (1);
2807
2808 # endif /* HAVE_LIBSSL */
2809 }
2810 #endif /* HAVE_SSL */
2811
2812
2813 #ifdef HAVE_CDSASSL
2814 /*
2815 * 'get_cdsa_server_certs()' - Convert a keychain name into the CFArrayRef
2816 * required by SSLSetCertificate.
2817 *
2818 * For now we assumes that there is exactly one SecIdentity in the
2819 * keychain - i.e. there is exactly one matching cert/private key pair.
2820 * In the future we will search a keychain for a SecIdentity matching a
2821 * specific criteria. We also skip the operation of adding additional
2822 * non-signing certs from the keychain to the CFArrayRef.
2823 *
2824 * To create a self-signed certificate for testing use the certtool.
2825 * Executing the following as root will do it:
2826 *
2827 * certtool c k=/Library/Keychains/System.keychain
2828 */
2829
2830 static CFArrayRef /* O - Array of certificates */
2831 get_cdsa_server_certs(void)
2832 {
2833 OSStatus err; /* Error info */
2834 SecKeychainRef kcRef; /* Keychain reference */
2835 SecIdentitySearchRef srchRef; /* Search reference */
2836 SecIdentityRef identity; /* Identity */
2837 CFArrayRef ca; /* Certificate array */
2838
2839
2840 kcRef = NULL;
2841 srchRef = NULL;
2842 identity = NULL;
2843 ca = NULL;
2844 err = SecKeychainOpen(ServerCertificate, &kcRef);
2845
2846 if (err)
2847 cupsdLogMessage(CUPSD_LOG_ERROR, "Cannot open keychain \"%s\", error %d.",
2848 ServerCertificate, (int)err);
2849 else
2850 {
2851 /*
2852 * Search for "any" identity matching specified key use;
2853 * in this app, we expect there to be exactly one.
2854 */
2855
2856 err = SecIdentitySearchCreate(kcRef, CSSM_KEYUSE_SIGN, &srchRef);
2857
2858 if (err)
2859 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2860 "Cannot find signing key in keychain \"%s\", error %d",
2861 ServerCertificate, (int)err);
2862 else
2863 {
2864 err = SecIdentitySearchCopyNext(srchRef, &identity);
2865
2866 if (err)
2867 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2868 "Cannot find signing key in keychain \"%s\", error %d",
2869 ServerCertificate, (int)err);
2870 else
2871 {
2872 if (CFGetTypeID(identity) != SecIdentityGetTypeID())
2873 cupsdLogMessage(CUPSD_LOG_ERROR,
2874 "SecIdentitySearchCopyNext CFTypeID failure!");
2875 else
2876 {
2877 /*
2878 * Found one. Place it in a CFArray.
2879 * TBD: snag other (non-identity) certs from keychain and add them
2880 * to array as well.
2881 */
2882
2883 ca = CFArrayCreate(NULL, (const void **)&identity, 1, &kCFTypeArrayCallBacks);
2884
2885 if (ca == nil)
2886 cupsdLogMessage(CUPSD_LOG_ERROR, "CFArrayCreate error");
2887 }
2888
2889 CFRelease(identity);
2890 }
2891
2892 CFRelease(srchRef);
2893 }
2894
2895 CFRelease(kcRef);
2896 }
2897
2898 return (ca);
2899 }
2900 #endif /* HAVE_CDSASSL */
2901
2902
2903 /*
2904 * 'get_file()' - Get a filename and state info.
2905 */
2906
2907 static char * /* O - Real filename */
2908 get_file(cupsd_client_t *con, /* I - Client connection */
2909 struct stat *filestats, /* O - File information */
2910 char *filename, /* IO - Filename buffer */
2911 int len) /* I - Buffer length */
2912 {
2913 int status; /* Status of filesystem calls */
2914 char *ptr; /* Pointer info filename */
2915 int plen; /* Remaining length after pointer */
2916
2917
2918 /*
2919 * Need to add DocumentRoot global...
2920 */
2921
2922 if (!strncmp(con->uri, "/ppd/", 5))
2923 snprintf(filename, len, "%s%s", ServerRoot, con->uri);
2924 else if (!strncmp(con->uri, "/admin/conf/", 12))
2925 snprintf(filename, len, "%s%s", ServerRoot, con->uri + 11);
2926 else if (!strncmp(con->uri, "/admin/log/", 11))
2927 {
2928 if (!strcmp(con->uri + 11, "access_log") && AccessLog[0] == '/')
2929 strlcpy(filename, AccessLog, len);
2930 else if (!strcmp(con->uri + 11, "error_log") && ErrorLog[0] == '/')
2931 strlcpy(filename, ErrorLog, len);
2932 else if (!strcmp(con->uri + 11, "page_log") && PageLog[0] == '/')
2933 strlcpy(filename, PageLog, len);
2934 else
2935 return (NULL);
2936 }
2937 else if (con->language)
2938 snprintf(filename, len, "%s/%s%s", DocumentRoot, con->language->language,
2939 con->uri);
2940 else
2941 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
2942
2943 if ((ptr = strchr(filename, '?')) != NULL)
2944 *ptr = '\0';
2945
2946 /*
2947 * Grab the status for this language; if there isn't a language-specific file
2948 * then fallback to the default one...
2949 */
2950
2951 if ((status = stat(filename, filestats)) != 0 && con->language &&
2952 strncmp(con->uri, "/ppd/", 5) &&
2953 strncmp(con->uri, "/admin/conf/", 12) &&
2954 strncmp(con->uri, "/admin/log/", 11))
2955 {
2956 /*
2957 * Drop the country code...
2958 */
2959
2960 char ll[3]; /* Short language name */
2961
2962
2963 strlcpy(ll, con->language->language, sizeof(ll));
2964 snprintf(filename, len, "%s/%s%s", DocumentRoot, ll, con->uri);
2965
2966 if ((ptr = strchr(filename, '?')) != NULL)
2967 *ptr = '\0';
2968
2969 if ((status = stat(filename, filestats)) != 0)
2970 {
2971 /*
2972 * Drop the language prefix and try the root directory...
2973 */
2974
2975 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
2976
2977 if ((ptr = strchr(filename, '?')) != NULL)
2978 *ptr = '\0';
2979
2980 status = stat(filename, filestats);
2981 }
2982 }
2983
2984 /*
2985 * If we're found a directory, get the index.html file instead...
2986 */
2987
2988 if (!status && S_ISDIR(filestats->st_mode))
2989 {
2990 if (filename[strlen(filename) - 1] != '/')
2991 strlcat(filename, "/", len);
2992
2993 ptr = filename + strlen(filename);
2994 plen = len - (ptr - filename);
2995
2996 strlcpy(ptr, "index.html", plen);
2997 status = stat(filename, filestats);
2998
2999 #ifdef HAVE_JAVA
3000 if (status)
3001 {
3002 strlcpy(ptr, "index.class", plen);
3003 status = stat(filename, filestats);
3004 }
3005 #endif /* HAVE_JAVA */
3006
3007 #ifdef HAVE_PERL
3008 if (status)
3009 {
3010 strlcpy(ptr, "index.pl", plen);
3011 status = stat(filename, filestats);
3012 }
3013 #endif /* HAVE_PERL */
3014
3015 #ifdef HAVE_PHP
3016 if (status)
3017 {
3018 strlcpy(ptr, "index.php", plen);
3019 status = stat(filename, filestats);
3020 }
3021 #endif /* HAVE_PHP */
3022
3023 #ifdef HAVE_PYTHON
3024 if (status)
3025 {
3026 strlcpy(ptr, "index.pyc", plen);
3027 status = stat(filename, filestats);
3028 }
3029
3030 if (status)
3031 {
3032 strlcpy(ptr, "index.py", plen);
3033 status = stat(filename, filestats);
3034 }
3035 #endif /* HAVE_PYTHON */
3036 }
3037
3038 cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_file: %d filename=%s size=%d",
3039 con->http.fd, filename,
3040 status ? -1 : (int)filestats->st_size);
3041
3042 if (!status)
3043 con->http.data_remaining = (int)filestats->st_size;
3044
3045 if (status)
3046 return (NULL);
3047 else
3048 return (filename);
3049 }
3050
3051
3052 /*
3053 * 'install_conf_file()' - Install a configuration file.
3054 */
3055
3056 static http_status_t /* O - Status */
3057 install_conf_file(cupsd_client_t *con) /* I - Connection */
3058 {
3059 cups_file_t *in, /* Input file */
3060 *out; /* Output file */
3061 char buffer[1024]; /* Copy buffer */
3062 int bytes; /* Number of bytes */
3063 char conffile[1024], /* Configuration filename */
3064 newfile[1024], /* New config filename */
3065 oldfile[1024]; /* Old config filename */
3066 struct stat confinfo; /* Config file info */
3067
3068
3069 /*
3070 * First construct the filenames...
3071 */
3072
3073 snprintf(conffile, sizeof(conffile), "%s%s", ServerRoot, con->uri + 11);
3074 snprintf(newfile, sizeof(newfile), "%s%s.N", ServerRoot, con->uri + 11);
3075 snprintf(oldfile, sizeof(oldfile), "%s%s.O", ServerRoot, con->uri + 11);
3076
3077 cupsdLogMessage(CUPSD_LOG_INFO, "Installing config file \"%s\"...", conffile);
3078
3079 /*
3080 * Get the owner, group, and permissions of the configuration file.
3081 * If it doesn't exist, assign it to the User and Group in the
3082 * cupsd.conf file with mode 0640 permissions.
3083 */
3084
3085 if (stat(conffile, &confinfo))
3086 {
3087 confinfo.st_uid = User;
3088 confinfo.st_gid = Group;
3089 confinfo.st_mode = ConfigFilePerm;
3090 }
3091
3092 /*
3093 * Open the request file and new config file...
3094 */
3095
3096 if ((in = cupsFileOpen(con->filename, "rb")) == NULL)
3097 {
3098 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open request file \"%s\" - %s",
3099 con->filename, strerror(errno));
3100 return (HTTP_SERVER_ERROR);
3101 }
3102
3103 if ((out = cupsFileOpen(newfile, "wb")) == NULL)
3104 {
3105 cupsFileClose(in);
3106 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open config file \"%s\" - %s",
3107 newfile, strerror(errno));
3108 return (HTTP_SERVER_ERROR);
3109 }
3110
3111 fchmod(cupsFileNumber(out), confinfo.st_mode);
3112 fchown(cupsFileNumber(out), confinfo.st_uid, confinfo.st_gid);
3113
3114 /*
3115 * Copy from the request to the new config file...
3116 */
3117
3118 while ((bytes = cupsFileRead(in, buffer, sizeof(buffer))) > 0)
3119 if (cupsFileWrite(out, buffer, bytes) < bytes)
3120 {
3121 cupsdLogMessage(CUPSD_LOG_ERROR,
3122 "Unable to copy to config file \"%s\" - %s",
3123 newfile, strerror(errno));
3124
3125 cupsFileClose(in);
3126 cupsFileClose(out);
3127 unlink(newfile);
3128
3129 return (HTTP_SERVER_ERROR);
3130 }
3131
3132 /*
3133 * Close the files...
3134 */
3135
3136 cupsFileClose(in);
3137 if (cupsFileClose(out))
3138 {
3139 cupsdLogMessage(CUPSD_LOG_ERROR,
3140 "Error file closing config file \"%s\" - %s",
3141 newfile, strerror(errno));
3142
3143 unlink(newfile);
3144
3145 return (HTTP_SERVER_ERROR);
3146 }
3147
3148 /*
3149 * Remove the request file...
3150 */
3151
3152 unlink(con->filename);
3153 cupsdClearString(&con->filename);
3154
3155 /*
3156 * Unlink the old backup, rename the current config file to the backup
3157 * filename, and rename the new config file to the config file name...
3158 */
3159
3160 if (unlink(oldfile))
3161 if (errno != ENOENT)
3162 {
3163 cupsdLogMessage(CUPSD_LOG_ERROR,
3164 "Unable to remove backup config file \"%s\" - %s",
3165 oldfile, strerror(errno));
3166
3167 unlink(newfile);
3168
3169 return (HTTP_SERVER_ERROR);
3170 }
3171
3172 if (rename(conffile, oldfile))
3173 if (errno != ENOENT)
3174 {
3175 cupsdLogMessage(CUPSD_LOG_ERROR,
3176 "Unable to rename old config file \"%s\" - %s",
3177 conffile, strerror(errno));
3178
3179 unlink(newfile);
3180
3181 return (HTTP_SERVER_ERROR);
3182 }
3183
3184 if (rename(newfile, conffile))
3185 {
3186 cupsdLogMessage(CUPSD_LOG_ERROR,
3187 "Unable to rename new config file \"%s\" - %s",
3188 newfile, strerror(errno));
3189
3190 rename(oldfile, conffile);
3191 unlink(newfile);
3192
3193 return (HTTP_SERVER_ERROR);
3194 }
3195
3196 /*
3197 * If the cupsd.conf file was updated, set the NeedReload flag...
3198 */
3199
3200 if (!strcmp(con->uri, "/admin/conf/cupsd.conf"))
3201 NeedReload = RELOAD_CUPSD;
3202 else
3203 NeedReload = RELOAD_ALL;
3204
3205 ReloadTime = time(NULL);
3206
3207 /*
3208 * Return that the file was created successfully...
3209 */
3210
3211 return (HTTP_CREATED);
3212 }
3213
3214
3215 /*
3216 * 'is_cgi()' - Is the resource a CGI script/program?
3217 */
3218
3219 static int /* O - 1 = CGI, 0 = file */
3220 is_cgi(cupsd_client_t *con, /* I - Client connection */
3221 const char *filename, /* I - Real filename */
3222 struct stat *filestats, /* I - File information */
3223 mime_type_t *type) /* I - MIME type */
3224 {
3225 const char *options; /* Options on URL */
3226
3227
3228 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3229 "is_cgi(con=%p, filename=\"%s\", filestats=%p, type=%s/%s)\n",
3230 con, filename, filestats, type ? type->super : "unknown",
3231 type ? type->type : "unknown");
3232
3233 /*
3234 * Get the options, if any...
3235 */
3236
3237 if ((options = strchr(con->uri, '?')) != NULL)
3238 options ++;
3239
3240 /*
3241 * Check for known types...
3242 */
3243
3244 if (!type || strcasecmp(type->super, "application"))
3245 {
3246 cupsdLogMessage(CUPSD_LOG_DEBUG2, "is_cgi: Returning 0...");
3247 return (0);
3248 }
3249
3250 if (!strcasecmp(type->type, "x-httpd-cgi") &&
3251 (filestats->st_mode & 0111))
3252 {
3253 /*
3254 * "application/x-httpd-cgi" is a CGI script.
3255 */
3256
3257 cupsdSetString(&con->command, filename);
3258
3259 filename = strrchr(filename, '/') + 1; /* Filename always absolute */
3260
3261 cupsdSetString(&con->options, options);
3262
3263 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3264 "is_cgi: Returning 1 with command=\"%s\" and options=\"%s\"",
3265 con->command, con->options);
3266
3267 return (1);
3268 }
3269 #ifdef HAVE_JAVA
3270 else if (!strcasecmp(type->type, "x-httpd-java"))
3271 {
3272 /*
3273 * "application/x-httpd-java" is a Java servlet.
3274 */
3275
3276 cupsdSetString(&con->command, CUPS_JAVA);
3277
3278 if (options)
3279 cupsdSetStringf(&con->options, "%s %s", filename, options);
3280 else
3281 cupsdSetString(&con->options, filename);
3282
3283 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3284 "is_cgi: Returning 1 with command=\"%s\" and options=\"%s\"",
3285 con->command, con->options);
3286
3287 return (1);
3288 }
3289 #endif /* HAVE_JAVA */
3290 #ifdef HAVE_PERL
3291 else if (!strcasecmp(type->type, "x-httpd-perl"))
3292 {
3293 /*
3294 * "application/x-httpd-perl" is a Perl page.
3295 */
3296
3297 cupsdSetString(&con->command, CUPS_PERL);
3298
3299 if (options)
3300 cupsdSetStringf(&con->options, "%s %s", filename, options);
3301 else
3302 cupsdSetString(&con->options, filename);
3303
3304 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3305 "is_cgi: Returning 1 with command=\"%s\" and options=\"%s\"",
3306 con->command, con->options);
3307
3308 return (1);
3309 }
3310 #endif /* HAVE_PERL */
3311 #ifdef HAVE_PHP
3312 else if (!strcasecmp(type->type, "x-httpd-php"))
3313 {
3314 /*
3315 * "application/x-httpd-php" is a PHP page.
3316 */
3317
3318 cupsdSetString(&con->command, CUPS_PHP);
3319
3320 if (options)
3321 cupsdSetStringf(&con->options, "%s %s", filename, options);
3322 else
3323 cupsdSetString(&con->options, filename);
3324
3325 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3326 "is_cgi: Returning 1 with command=\"%s\" and options=\"%s\"",
3327 con->command, con->options);
3328
3329 return (1);
3330 }
3331 #endif /* HAVE_PHP */
3332 #ifdef HAVE_PYTHON
3333 else if (!strcasecmp(type->type, "x-httpd-python"))
3334 {
3335 /*
3336 * "application/x-httpd-python" is a Python page.
3337 */
3338
3339 cupsdSetString(&con->command, CUPS_PYTHON);
3340
3341 if (options)
3342 cupsdSetStringf(&con->options, "%s %s", filename, options);
3343 else
3344 cupsdSetString(&con->options, filename);
3345
3346 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3347 "is_cgi: Returning 1 with command=\"%s\" and options=\"%s\"",
3348 con->command, con->options);
3349
3350 return (1);
3351 }
3352 #endif /* HAVE_PYTHON */
3353
3354 cupsdLogMessage(CUPSD_LOG_DEBUG2, "is_cgi: Returning 0...");
3355
3356 return (0);
3357 }
3358
3359
3360 /*
3361 * 'is_path_absolute()' - Is a path absolute and free of relative elements (i.e. "..").
3362 */
3363
3364 static int /* O - 0 if relative, 1 if absolute */
3365 is_path_absolute(const char *path) /* I - Input path */
3366 {
3367 /*
3368 * Check for a leading slash...
3369 */
3370
3371 if (path[0] != '/')
3372 return (0);
3373
3374 /*
3375 * Check for "/.." in the path...
3376 */
3377
3378 while ((path = strstr(path, "/..")) != NULL)
3379 {
3380 if (!path[3] || path[3] == '/')
3381 return (0);
3382
3383 path ++;
3384 }
3385
3386 /*
3387 * If we haven't found any relative paths, return 1 indicating an
3388 * absolute path...
3389 */
3390
3391 return (1);
3392 }
3393
3394
3395 #ifdef HAVE_SSL
3396 /*
3397 * 'make_certificate()' - Make a self-signed SSL/TLS certificate.
3398 */
3399
3400 static int /* O - 1 on success, 0 on failure */
3401 make_certificate(void)
3402 {
3403 #if defined(HAVE_LIBSSL) && defined(HAVE_WAITPID)
3404 int pid, /* Process ID of command */
3405 status; /* Status of command */
3406 char command[1024], /* Command */
3407 *argv[11], /* Command-line arguments */
3408 *envp[MAX_ENV + 1], /* Environment variables */
3409 home[1024], /* HOME environment variable */
3410 infofile[1024], /* Type-in information for cert */
3411 seedfile[1024]; /* Random number seed file */
3412 int envc, /* Number of environment variables */
3413 bytes; /* Bytes written */
3414 cups_file_t *fp; /* Seed/info file */
3415 int infofd; /* Info file descriptor */
3416
3417
3418 /*
3419 * Run the "openssl" command to seed the random number generator and
3420 * generate a self-signed certificate that is good for 10 years:
3421 *
3422 * openssl rand -rand seedfile 1
3423 *
3424 * openssl req -new -x509 -keyout ServerKey \
3425 * -out ServerCertificate -days 3650 -nodes
3426 *
3427 * The seeding step is crucial in ensuring that the openssl command
3428 * does not block on systems without sufficient entropy...
3429 */
3430
3431 if (!cupsFileFind("openssl", getenv("PATH"), 1, command, sizeof(command)))
3432 {
3433 cupsdLogMessage(CUPSD_LOG_ERROR,
3434 "No SSL certificate and openssl command not found!");
3435 return (0);
3436 }
3437
3438 if (access("/dev/urandom", 0))
3439 {
3440 /*
3441 * If the system doesn't provide /dev/urandom, then any random source
3442 * will probably be blocking-style, so generate some random data to
3443 * use as a seed for the certificate. Note that we have already
3444 * seeded the random number generator in cupsdInitCerts()...
3445 */
3446
3447 cupsdLogMessage(CUPSD_LOG_INFO,
3448 "Seeding the random number generator...");
3449
3450 snprintf(home, sizeof(home), "HOME=%s", TempDir);
3451
3452 /*
3453 * Write the seed file...
3454 */
3455
3456 if ((fp = cupsTempFile2(seedfile, sizeof(seedfile))) == NULL)
3457 {
3458 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to create seed file %s - %s",
3459 seedfile, strerror(errno));
3460 return (0);
3461 }
3462
3463 for (bytes = 0; bytes < 262144; bytes ++)
3464 cupsFilePutChar(fp, random());
3465
3466 cupsFileClose(fp);
3467
3468 /*
3469 * Run the openssl command to seed its random number generator...
3470 */
3471
3472 argv[0] = "openssl";
3473 argv[1] = "rand";
3474 argv[2] = "-rand";
3475 argv[3] = seedfile;
3476 argv[4] = "1";
3477 argv[5] = NULL;
3478
3479 envc = cupsdLoadEnv(envp, MAX_ENV);
3480 envp[envc++] = home;
3481 envp[envc] = NULL;
3482
3483 if (!cupsdStartProcess(command, argv, envp, -1, -1, -1, -1, 1, &pid))
3484 {
3485 unlink(seedfile);
3486 return (0);
3487 }
3488
3489 while (waitpid(pid, &status, 0) < 0)
3490 if (errno != EINTR)
3491 {
3492 status = 1;
3493 break;
3494 }
3495
3496 cupsdFinishProcess(pid, command, sizeof(command));
3497
3498 /*
3499 * Remove the seed file, as it is no longer needed...
3500 */
3501
3502 unlink(seedfile);
3503
3504 if (status)
3505 {
3506 if (WIFEXITED(status))
3507 cupsdLogMessage(CUPSD_LOG_ERROR,
3508 "Unable to seed random number generator - "
3509 "the openssl command stopped with status %d!",
3510 WEXITSTATUS(status));
3511 else
3512 cupsdLogMessage(CUPSD_LOG_ERROR,
3513 "Unable to seed random number generator - "
3514 "the openssl command crashed on signal %d!",
3515 WTERMSIG(status));
3516
3517 return (0);
3518 }
3519 }
3520
3521 /*
3522 * Create a file with the certificate information fields...
3523 *
3524 * Note: This assumes that the default questions are asked by the openssl
3525 * command...
3526 */
3527
3528 if ((fp = cupsTempFile2(infofile, sizeof(infofile))) == NULL)
3529 {
3530 cupsdLogMessage(CUPSD_LOG_ERROR,
3531 "Unable to create certificate information file %s - %s",
3532 infofile, strerror(errno));
3533 return (0);
3534 }
3535
3536 cupsFilePrintf(fp, ".\n.\n.\n%s\n.\n%s\n%s\n",
3537 ServerName, ServerName, ServerAdmin);
3538 cupsFileClose(fp);
3539
3540 cupsdLogMessage(CUPSD_LOG_INFO,
3541 "Generating SSL server key and certificate...");
3542
3543 argv[0] = "openssl";
3544 argv[1] = "req";
3545 argv[2] = "-new";
3546 argv[3] = "-x509";
3547 argv[4] = "-keyout";
3548 argv[5] = ServerKey;
3549 argv[6] = "-out";
3550 argv[7] = ServerCertificate;
3551 argv[8] = "-days";
3552 argv[9] = "3650";
3553 argv[10] = "-nodes";
3554 argv[11] = NULL;
3555
3556 cupsdLoadEnv(envp, MAX_ENV);
3557
3558 infofd = open(infofile, O_RDONLY);
3559
3560 if (!cupsdStartProcess(command, argv, envp, infofd, -1, -1, -1, 1, &pid))
3561 {
3562 close(infofd);
3563 unlink(infofile);
3564 return (0);
3565 }
3566
3567 close(infofd);
3568 unlink(infofile);
3569
3570 while (waitpid(pid, &status, 0) < 0)
3571 if (errno != EINTR)
3572 {
3573 status = 1;
3574 break;
3575 }
3576
3577 cupsdFinishProcess(pid, command, sizeof(command));
3578
3579 if (status)
3580 {
3581 if (WIFEXITED(status))
3582 cupsdLogMessage(CUPSD_LOG_ERROR,
3583 "Unable to create SSL server key and certificate - "
3584 "the openssl command stopped with status %d!",
3585 WEXITSTATUS(status));
3586 else
3587 cupsdLogMessage(CUPSD_LOG_ERROR,
3588 "Unable to create SSL server key and certificate - "
3589 "the openssl command crashed on signal %d!",
3590 WTERMSIG(status));
3591 }
3592 else
3593 {
3594 cupsdLogMessage(CUPSD_LOG_INFO, "Created SSL server key file \"%s\"...",
3595 ServerKey);
3596 cupsdLogMessage(CUPSD_LOG_INFO,
3597 "Created SSL server certificate file \"%s\"...",
3598 ServerCertificate);
3599 }
3600
3601 return (!status);
3602
3603 #elif defined(HAVE_GNUTLS)
3604 gnutls_x509_crt crt; /* Self-signed certificate */
3605 gnutls_x509_privkey key; /* Encryption key */
3606 cups_lang_t *language; /* Default language info */
3607 cups_file_t *fp; /* Key/cert file */
3608 unsigned char buffer[8192]; /* Buffer for x509 data */
3609 size_t bytes; /* Number of bytes of data */
3610 unsigned char serial[4]; /* Serial number buffer */
3611 time_t curtime; /* Current time */
3612 int result; /* Result of GNU TLS calls */
3613
3614
3615 /*
3616 * Create the encryption key...
3617 */
3618
3619 cupsdLogMessage(CUPSD_LOG_INFO, "Generating SSL server key...");
3620
3621 gnutls_x509_privkey_init(&key);
3622 gnutls_x509_privkey_generate(key, GNUTLS_PK_RSA, 2048, 0);
3623
3624 /*
3625 * Save it...
3626 */
3627
3628 bytes = sizeof(buffer);
3629
3630 if ((result = gnutls_x509_privkey_export(key, GNUTLS_X509_FMT_PEM,
3631 buffer, &bytes)) < 0)
3632 {
3633 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to export SSL server key - %s",
3634 gnutls_strerror(result));
3635 gnutls_x509_privkey_deinit(key);
3636 return (0);
3637 }
3638 else if ((fp = cupsFileOpen(ServerKey, "w")) != NULL)
3639 {
3640 cupsFileWrite(fp, (char *)buffer, bytes);
3641 cupsFileClose(fp);
3642
3643 cupsdLogMessage(CUPSD_LOG_INFO, "Created SSL server key file \"%s\"...",
3644 ServerKey);
3645 }
3646 else
3647 {
3648 cupsdLogMessage(CUPSD_LOG_ERROR,
3649 "Unable to create SSL server key file \"%s\" - %s",
3650 ServerKey, strerror(errno));
3651 gnutls_x509_privkey_deinit(key);
3652 return (0);
3653 }
3654
3655 /*
3656 * Create the self-signed certificate...
3657 */
3658
3659 cupsdLogMessage(CUPSD_LOG_INFO, "Generating self-signed SSL certificate...");
3660
3661 language = cupsLangDefault();
3662 curtime = time(NULL);
3663 serial[0] = curtime >> 24;
3664 serial[1] = curtime >> 16;
3665 serial[2] = curtime >> 8;
3666 serial[3] = curtime;
3667
3668 gnutls_x509_crt_init(&crt);
3669 if (strlen(language->language) == 5)
3670 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0,
3671 language->language + 3, 2);
3672 else
3673 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0,
3674 "US", 2);
3675 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0,
3676 ServerName, strlen(ServerName));
3677 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATION_NAME, 0,
3678 ServerName, strlen(ServerName));
3679 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATIONAL_UNIT_NAME,
3680 0, "Unknown", 7);
3681 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_STATE_OR_PROVINCE_NAME, 0,
3682 "Unknown", 7);
3683 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_LOCALITY_NAME, 0,
3684 "Unknown", 7);
3685 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_PKCS9_EMAIL, 0,
3686 ServerAdmin, strlen(ServerAdmin));
3687 gnutls_x509_crt_set_key(crt, key);
3688 gnutls_x509_crt_set_serial(crt, serial, sizeof(serial));
3689 gnutls_x509_crt_set_activation_time(crt, curtime);
3690 gnutls_x509_crt_set_expiration_time(crt, curtime + 10 * 365 * 86400);
3691 gnutls_x509_crt_set_ca_status(crt, 0);
3692 gnutls_x509_crt_set_subject_alternative_name(crt, GNUTLS_SAN_DNSNAME,
3693 ServerName);
3694 gnutls_x509_crt_set_key_purpose_oid(crt, GNUTLS_KP_TLS_WWW_SERVER, 0);
3695 gnutls_x509_crt_set_key_usage(crt, GNUTLS_KEY_KEY_ENCIPHERMENT);
3696 gnutls_x509_crt_set_version(crt, 3);
3697
3698 bytes = sizeof(buffer);
3699 if (gnutls_x509_crt_get_key_id(crt, 0, buffer, &bytes) >= 0)
3700 gnutls_x509_crt_set_subject_key_id(crt, buffer, bytes);
3701
3702 gnutls_x509_crt_sign(crt, crt, key);
3703
3704 /*
3705 * Save it...
3706 */
3707
3708 bytes = sizeof(buffer);
3709 if ((result = gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM,
3710 buffer, &bytes)) < 0)
3711 cupsdLogMessage(CUPSD_LOG_ERROR,
3712 "Unable to export SSL server certificate - %s",
3713 gnutls_strerror(result));
3714 else if ((fp = cupsFileOpen(ServerCertificate, "w")) != NULL)
3715 {
3716 cupsFileWrite(fp, (char *)buffer, bytes);
3717 cupsFileClose(fp);
3718
3719 cupsdLogMessage(CUPSD_LOG_INFO,
3720 "Created SSL server certificate file \"%s\"...",
3721 ServerCertificate);
3722 }
3723 else
3724 cupsdLogMessage(CUPSD_LOG_ERROR,
3725 "Unable to create SSL server certificate file \"%s\" - %s",
3726 ServerCertificate, strerror(errno));
3727
3728 /*
3729 * Cleanup...
3730 */
3731
3732 gnutls_x509_crt_deinit(crt);
3733 gnutls_x509_privkey_deinit(key);
3734
3735 return (1);
3736
3737 #elif defined(HAVE_CDSASSL) && defined(HAVE_WAITPID)
3738 int pid, /* Process ID of command */
3739 status; /* Status of command */
3740 char command[1024], /* Command */
3741 keychain[1024], /* Keychain argument */
3742 *argv[5], /* Command-line arguments */
3743 *envp[MAX_ENV]; /* Environment variables */
3744
3745
3746 /*
3747 * Run the "certtool" command to generate a self-signed certificate:
3748 *
3749 * certtool c Z k=ServerCertificate
3750 */
3751
3752 if (!cupsFileFind("certtool", getenv("PATH"), 1, command, sizeof(command)))
3753 {
3754 cupsdLogMessage(CUPSD_LOG_ERROR,
3755 "No SSL certificate and certtool command not found!");
3756 return (0);
3757 }
3758
3759 cupsdLogMessage(CUPSD_LOG_INFO,
3760 "Generating SSL server key and certificate...");
3761
3762 snprintf(keychain, sizeof(keychain), "k=%s", ServerCertificate);
3763
3764 argv[0] = "certtool";
3765 argv[1] = "c";
3766 argv[2] = "Z";
3767 argv[3] = keychain;
3768 argv[4] = NULL;
3769
3770 cupsdLoadEnv(envp, MAX_ENV);
3771
3772 if (!cupsdStartProcess(command, argv, envp, -1, -1, -1, -1, 1, &pid))
3773 return (0);
3774
3775 while (waitpid(pid, &status, 0) < 0)
3776 if (errno != EINTR)
3777 {
3778 status = 1;
3779 break;
3780 }
3781
3782 cupsdFinishProcess(pid, command, sizeof(command));
3783
3784 if (status)
3785 {
3786 if (WIFEXITED(status))
3787 cupsdLogMessage(CUPSD_LOG_ERROR,
3788 "Unable to create SSL server key and certificate - "
3789 "the certtool command stopped with status %d!",
3790 WEXITSTATUS(status));
3791 else
3792 cupsdLogMessage(CUPSD_LOG_ERROR,
3793 "Unable to create SSL server key and certificate - "
3794 "the certtool command crashed on signal %d!",
3795 WTERMSIG(status));
3796 }
3797 else
3798 {
3799 cupsdLogMessage(CUPSD_LOG_INFO,
3800 "Created SSL server certificate file \"%s\"...",
3801 ServerCertificate);
3802 }
3803
3804 return (!status);
3805
3806 #else
3807 return (0);
3808 #endif /* HAVE_LIBSSL && HAVE_WAITPID */
3809 }
3810 #endif /* HAVE_SSL */
3811
3812
3813 /*
3814 * 'pipe_command()' - Pipe the output of a command to the remote client.
3815 */
3816
3817 static int /* O - Process ID */
3818 pipe_command(cupsd_client_t *con, /* I - Client connection */
3819 int infile, /* I - Standard input for command */
3820 int *outfile, /* O - Standard output for command */
3821 char *command, /* I - Command to run */
3822 char *options, /* I - Options for command */
3823 int root) /* I - Run as root? */
3824 {
3825 int i; /* Looping var */
3826 int pid; /* Process ID */
3827 char *commptr, /* Command string pointer */
3828 commch; /* Command string character */
3829 char *uriptr; /* URI string pointer */
3830 int fds[2]; /* Pipe FDs */
3831 int argc; /* Number of arguments */
3832 int envc; /* Number of environment variables */
3833 char argbuf[10240], /* Argument buffer */
3834 *argv[100], /* Argument strings */
3835 *envp[MAX_ENV + 17]; /* Environment variables */
3836 char content_length[1024], /* CONTENT_LENGTH environment variable */
3837 content_type[1024], /* CONTENT_TYPE environment variable */
3838 http_cookie[32768], /* HTTP_COOKIE environment variable */
3839 http_user_agent[1024], /* HTTP_USER_AGENT environment variable */
3840 lang[1024], /* LANG environment variable */
3841 path_info[1024], /* PATH_INFO environment variable */
3842 *query_string, /* QUERY_STRING env variable */
3843 remote_addr[1024], /* REMOTE_ADDR environment variable */
3844 remote_host[1024], /* REMOTE_HOST environment variable */
3845 remote_user[1024], /* REMOTE_USER environment variable */
3846 script_name[1024], /* SCRIPT_NAME environment variable */
3847 server_name[1024], /* SERVER_NAME environment variable */
3848 server_port[1024]; /* SERVER_PORT environment variable */
3849
3850
3851 /*
3852 * Parse a copy of the options string, which is of the form:
3853 *
3854 * argument+argument+argument
3855 * ?argument+argument+argument
3856 * param=value&param=value
3857 * ?param=value&param=value
3858 * /name?argument+argument+argument
3859 * /name?param=value&param=value
3860 *
3861 * If the string contains an "=" character after the initial name,
3862 * then we treat it as a HTTP GET form request and make a copy of
3863 * the remaining string for the environment variable.
3864 *
3865 * The string is always parsed out as command-line arguments, to
3866 * be consistent with Apache...
3867 */
3868
3869 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3870 "pipe_command: command=\"%s\", options=\"%s\"",
3871 command, options ? options : "(null)");
3872
3873 argv[0] = command;
3874 query_string = NULL;
3875
3876 if (options)
3877 strlcpy(argbuf, options, sizeof(argbuf));
3878 else
3879 argbuf[0] = '\0';
3880
3881 if (argbuf[0] == '/')
3882 {
3883 /*
3884 * Found some trailing path information, set PATH_INFO...
3885 */
3886
3887 if ((commptr = strchr(argbuf, '?')) == NULL)
3888 commptr = argbuf + strlen(argbuf);
3889
3890 commch = *commptr;
3891 *commptr = '\0';
3892 snprintf(path_info, sizeof(path_info), "PATH_INFO=%s", argbuf);
3893 *commptr = commch;
3894 }
3895 else
3896 {
3897 commptr = argbuf;
3898 path_info[0] = '\0';
3899 }
3900
3901 if (*commptr == '?' && con->operation == HTTP_GET)
3902 {
3903 commptr ++;
3904 cupsdSetStringf(&query_string, "QUERY_STRING=%s", commptr);
3905 }
3906
3907 argc = 1;
3908
3909 if (*commptr)
3910 {
3911 argv[argc ++] = commptr;
3912
3913 for (; *commptr && argc < 99; commptr ++)
3914 {
3915 /*
3916 * Break arguments whenever we see a + or space...
3917 */
3918
3919 if (*commptr == ' ' || *commptr == '+')
3920 {
3921 while (*commptr == ' ' || *commptr == '+')
3922 *commptr++ = '\0';
3923
3924 /*
3925 * If we don't have a blank string, save it as another argument...
3926 */
3927
3928 if (*commptr)
3929 {
3930 argv[argc] = commptr;
3931 argc ++;
3932 }
3933 else
3934 break;
3935 }
3936 else if (*commptr == '%' && isxdigit(commptr[1] & 255) &&
3937 isxdigit(commptr[2] & 255))
3938 {
3939 /*
3940 * Convert the %xx notation to the individual character.
3941 */
3942
3943 if (commptr[1] >= '0' && commptr[1] <= '9')
3944 *commptr = (commptr[1] - '0') << 4;
3945 else
3946 *commptr = (tolower(commptr[1]) - 'a' + 10) << 4;
3947
3948 if (commptr[2] >= '0' && commptr[2] <= '9')
3949 *commptr |= commptr[2] - '0';
3950 else
3951 *commptr |= tolower(commptr[2]) - 'a' + 10;
3952
3953 _cups_strcpy(commptr + 1, commptr + 3);
3954
3955 /*
3956 * Check for a %00 and break if that is the case...
3957 */
3958
3959 if (!*commptr)
3960 break;
3961 }
3962 }
3963 }
3964
3965 argv[argc] = NULL;
3966
3967 /*
3968 * Setup the environment variables as needed...
3969 */
3970
3971 if (con->language)
3972 snprintf(lang, sizeof(lang), "LANG=%s.UTF-8", con->language->language);
3973 else
3974 strcpy(lang, "LANG=C");
3975
3976 strcpy(remote_addr, "REMOTE_ADDR=");
3977 httpAddrString(con->http.hostaddr, remote_addr + 12,
3978 sizeof(remote_addr) - 12);
3979
3980 snprintf(remote_host, sizeof(remote_host), "REMOTE_HOST=%s",
3981 con->http.hostname);
3982
3983 snprintf(script_name, sizeof(script_name), "SCRIPT_NAME=%s", con->uri);
3984 if ((uriptr = strchr(script_name, '?')) != NULL)
3985 *uriptr = '\0';
3986
3987 sprintf(server_port, "SERVER_PORT=%d", con->serverport);
3988
3989 snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s",
3990 con->servername);
3991
3992 envc = cupsdLoadEnv(envp, (int)(sizeof(envp) / sizeof(envp[0])));
3993
3994 envp[envc ++] = lang;
3995 envp[envc ++] = "REDIRECT_STATUS=1";
3996 envp[envc ++] = server_name;
3997 envp[envc ++] = server_port;
3998 envp[envc ++] = remote_addr;
3999 envp[envc ++] = remote_host;
4000 envp[envc ++] = script_name;
4001
4002 if (path_info[0])
4003 envp[envc ++] = path_info;
4004
4005 if (con->username[0])
4006 {
4007 snprintf(remote_user, sizeof(remote_user), "REMOTE_USER=%s", con->username);
4008
4009 envp[envc ++] = remote_user;
4010 }
4011
4012 if (con->http.version == HTTP_1_1)
4013 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.1";
4014 else if (con->http.version == HTTP_1_0)
4015 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.0";
4016 else
4017 envp[envc ++] = "SERVER_PROTOCOL=HTTP/0.9";
4018
4019 if (con->http.cookie)
4020 {
4021 snprintf(http_cookie, sizeof(http_cookie), "HTTP_COOKIE=%s",
4022 con->http.cookie);
4023 envp[envc ++] = http_cookie;
4024 }
4025
4026 if (con->http.fields[HTTP_FIELD_USER_AGENT][0])
4027 {
4028 snprintf(http_user_agent, sizeof(http_user_agent), "HTTP_USER_AGENT=%s",
4029 con->http.fields[HTTP_FIELD_USER_AGENT]);
4030 envp[envc ++] = http_user_agent;
4031 }
4032
4033 if (con->operation == HTTP_GET)
4034 {
4035 for (i = 0; i < argc; i ++)
4036 cupsdLogMessage(CUPSD_LOG_DEBUG2, "argv[%d] = \"%s\"", i, argv[i]);
4037
4038 envp[envc ++] = "REQUEST_METHOD=GET";
4039
4040 if (query_string)
4041 {
4042 /*
4043 * Add GET form variables after ?...
4044 */
4045
4046 envp[envc ++] = query_string;
4047 }
4048 }
4049 else
4050 {
4051 sprintf(content_length, "CONTENT_LENGTH=" CUPS_LLFMT,
4052 CUPS_LLCAST con->bytes);
4053 snprintf(content_type, sizeof(content_type), "CONTENT_TYPE=%s",
4054 con->http.fields[HTTP_FIELD_CONTENT_TYPE]);
4055
4056 envp[envc ++] = "REQUEST_METHOD=POST";
4057 envp[envc ++] = content_length;
4058 envp[envc ++] = content_type;
4059 }
4060
4061 /*
4062 * Tell the CGI if we are using encryption...
4063 */
4064
4065 if (con->http.tls)
4066 envp[envc ++] = "HTTPS=ON";
4067
4068 /*
4069 * Terminate the environment array...
4070 */
4071
4072 envp[envc] = NULL;
4073
4074 if (LogLevel == CUPSD_LOG_DEBUG2)
4075 {
4076 for (i = 0; i < argc; i ++)
4077 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4078 "pipe_command: argv[%d] = \"%s\"", i, argv[i]);
4079 for (i = 0; i < envc; i ++)
4080 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4081 "pipe_command: envp[%d] = \"%s\"", i, envp[i]);
4082 }
4083
4084 /*
4085 * Create a pipe for the output...
4086 */
4087
4088 if (cupsdOpenPipe(fds))
4089 {
4090 cupsdClearString(&query_string);
4091
4092 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to create pipes for CGI %s - %s",
4093 argv[0], strerror(errno));
4094 return (0);
4095 }
4096
4097 /*
4098 * Then execute the command...
4099 */
4100
4101 if (cupsdStartProcess(command, argv, envp, infile, fds[1], CGIPipes[1],
4102 -1, root, &pid) < 0)
4103 {
4104 /*
4105 * Error - can't fork!
4106 */
4107
4108 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to fork for CGI %s - %s", argv[0],
4109 strerror(errno));
4110
4111 cupsdClosePipe(fds);
4112 pid = 0;
4113 }
4114 else
4115 {
4116 /*
4117 * Fork successful - return the PID...
4118 */
4119
4120 if (con->username[0])
4121 cupsdAddCert(pid, con->username);
4122
4123 cupsdLogMessage(CUPSD_LOG_DEBUG, "CGI %s started - PID = %d", command, pid);
4124
4125 *outfile = fds[0];
4126 close(fds[1]);
4127 }
4128
4129 cupsdClearString(&query_string);
4130
4131 return (pid);
4132 }
4133
4134
4135 /*
4136 * 'write_file()' - Send a file via HTTP.
4137 */
4138
4139 static int /* O - 0 on failure, 1 on success */
4140 write_file(cupsd_client_t *con, /* I - Client connection */
4141 http_status_t code, /* I - HTTP status */
4142 char *filename, /* I - Filename */
4143 char *type, /* I - File type */
4144 struct stat *filestats) /* O - File information */
4145 {
4146 con->file = open(filename, O_RDONLY);
4147
4148 cupsdLogMessage(CUPSD_LOG_DEBUG, "write_file: %d file=%d", con->http.fd,
4149 con->file);
4150
4151 if (con->file < 0)
4152 return (0);
4153
4154 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
4155
4156 con->pipe_pid = 0;
4157
4158 if (!cupsdSendHeader(con, code, type))
4159 return (0);
4160
4161 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
4162 httpGetDateString(filestats->st_mtime)) < 0)
4163 return (0);
4164 if (httpPrintf(HTTP(con), "Content-Length: " CUPS_LLFMT "\r\n",
4165 CUPS_LLCAST filestats->st_size) < 0)
4166 return (0);
4167 if (httpPrintf(HTTP(con), "\r\n") < 0)
4168 return (0);
4169
4170 if (cupsdFlushHeader(con) < 0)
4171 return (0);
4172
4173 con->http.data_encoding = HTTP_ENCODE_LENGTH;
4174 con->http.data_remaining = filestats->st_size;
4175
4176 if (con->http.data_remaining <= INT_MAX)
4177 con->http._data_remaining = con->http.data_remaining;
4178 else
4179 con->http._data_remaining = INT_MAX;
4180
4181 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4182 "write_file: Adding fd %d to OutputSet...", con->http.fd);
4183
4184 FD_SET(con->http.fd, OutputSet);
4185
4186 return (1);
4187 }
4188
4189
4190 /*
4191 * End of "$Id: client.c 5972 2006-09-19 20:44:07Z mike $".
4192 */
Unnamed repository; edit this file 'description' to name the repository.