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1 | /* | |
2 | * "$Id$" | |
3 | * | |
4 | * CGI form variable and array functions for CUPS. | |
5 | * | |
6 | * Copyright 2007-2011 by Apple Inc. | |
7 | * Copyright 1997-2005 by Easy Software Products. | |
8 | * | |
9 | * These coded instructions, statements, and computer programs are the | |
10 | * property of Apple Inc. and are protected by Federal copyright | |
11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
12 | * which should have been included with this file. If this file is | |
13 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
14 | * | |
15 | * Contents: | |
16 | * | |
17 | * cgiCheckVariables() - Check for the presence of "required" | |
18 | * variables. | |
19 | * cgiClearVariables() - Clear all form variables. | |
20 | * cgiGetArray() - Get an element from a form array. | |
21 | * cgiGetCookie() - Get a cookie value. | |
22 | * cgiGetFile() - Get the file (if any) that was submitted in | |
23 | * the form. | |
24 | * cgiGetSize() - Get the size of a form array value. | |
25 | * cgiGetVariable() - Get a CGI variable from the database. | |
26 | * cgiInitialize() - Initialize the CGI variable "database". | |
27 | * cgiIsPOST() - Determine whether this page was POSTed. | |
28 | * cgiSetArray() - Set array element N to the specified string. | |
29 | * cgiSetCookie() - Set a cookie value. | |
30 | * cgiSetSize() - Set the array size. | |
31 | * cgiSetVariable() - Set a CGI variable in the database. | |
32 | * cgi_add_variable() - Add a form variable. | |
33 | * cgi_compare_variables() - Compare two variables. | |
34 | * cgi_find_variable() - Find a variable. | |
35 | * cgi_initialize_cookies() - Initialize cookies. | |
36 | * cgi_initialize_get() - Initialize form variables using the GET | |
37 | * method. | |
38 | * cgi_initialize_multipart() - Initialize variables and file using the POST | |
39 | * method. | |
40 | * cgi_initialize_post() - Initialize variables using the POST method. | |
41 | * cgi_initialize_string() - Initialize form variables from a string. | |
42 | * cgi_passwd() - Catch authentication requests and notify the | |
43 | * server. | |
44 | * cgi_set_sid() - Set the CUPS session ID. | |
45 | * cgi_sort_variables() - Sort all form variables for faster lookup. | |
46 | * cgi_unlink_file() - Remove the uploaded form. | |
47 | */ | |
48 | ||
49 | /*#define DEBUG*/ | |
50 | #include "cgi-private.h" | |
51 | #include <cups/http.h> | |
52 | #include <cups/md5-private.h> | |
53 | ||
54 | ||
55 | /* | |
56 | * Session ID name | |
57 | */ | |
58 | ||
59 | #define CUPS_SID "org.cups.sid" | |
60 | ||
61 | ||
62 | /* | |
63 | * Data structure to hold all the CGI form variables and arrays... | |
64 | */ | |
65 | ||
66 | typedef struct /**** Form variable structure ****/ | |
67 | { | |
68 | const char *name; /* Name of variable */ | |
69 | int nvalues, /* Number of values */ | |
70 | avalues; /* Number of values allocated */ | |
71 | const char **values; /* Value(s) of variable */ | |
72 | } _cgi_var_t; | |
73 | ||
74 | ||
75 | /* | |
76 | * Local globals... | |
77 | */ | |
78 | ||
79 | static int num_cookies = 0;/* Number of cookies */ | |
80 | static cups_option_t *cookies = NULL;/* Cookies */ | |
81 | static int form_count = 0, /* Form variable count */ | |
82 | form_alloc = 0; /* Number of variables allocated */ | |
83 | static _cgi_var_t *form_vars = NULL; | |
84 | /* Form variables */ | |
85 | static cgi_file_t *form_file = NULL; | |
86 | /* Uploaded file */ | |
87 | ||
88 | ||
89 | /* | |
90 | * Local functions... | |
91 | */ | |
92 | ||
93 | static void cgi_add_variable(const char *name, int element, | |
94 | const char *value); | |
95 | static int cgi_compare_variables(const _cgi_var_t *v1, | |
96 | const _cgi_var_t *v2); | |
97 | static _cgi_var_t *cgi_find_variable(const char *name); | |
98 | static void cgi_initialize_cookies(void); | |
99 | static int cgi_initialize_get(void); | |
100 | static int cgi_initialize_multipart(const char *boundary); | |
101 | static int cgi_initialize_post(void); | |
102 | static int cgi_initialize_string(const char *data); | |
103 | static const char *cgi_passwd(const char *prompt); | |
104 | static const char *cgi_set_sid(void); | |
105 | static void cgi_sort_variables(void); | |
106 | static void cgi_unlink_file(void); | |
107 | ||
108 | ||
109 | /* | |
110 | * 'cgiCheckVariables()' - Check for the presence of "required" variables. | |
111 | * | |
112 | * Names may be separated by spaces and/or commas. | |
113 | */ | |
114 | ||
115 | int /* O - 1 if all variables present, 0 otherwise */ | |
116 | cgiCheckVariables(const char *names) /* I - Variables to look for */ | |
117 | { | |
118 | char name[255], /* Current variable name */ | |
119 | *s; /* Pointer in string */ | |
120 | const char *val; /* Value of variable */ | |
121 | int element; /* Array element number */ | |
122 | ||
123 | ||
124 | if (names == NULL) | |
125 | return (1); | |
126 | ||
127 | while (*names != '\0') | |
128 | { | |
129 | while (*names == ' ' || *names == ',') | |
130 | names ++; | |
131 | ||
132 | for (s = name; *names != '\0' && *names != ' ' && *names != ','; s ++, names ++) | |
133 | *s = *names; | |
134 | ||
135 | *s = 0; | |
136 | if (name[0] == '\0') | |
137 | break; | |
138 | ||
139 | if ((s = strrchr(name, '-')) != NULL) | |
140 | { | |
141 | *s = '\0'; | |
142 | element = atoi(s + 1) - 1; | |
143 | val = cgiGetArray(name, element); | |
144 | } | |
145 | else | |
146 | val = cgiGetVariable(name); | |
147 | ||
148 | if (val == NULL) | |
149 | return (0); | |
150 | ||
151 | if (*val == '\0') | |
152 | return (0); /* Can't be blank, either! */ | |
153 | } | |
154 | ||
155 | return (1); | |
156 | } | |
157 | ||
158 | ||
159 | /* | |
160 | * 'cgiClearVariables()' - Clear all form variables. | |
161 | */ | |
162 | ||
163 | void | |
164 | cgiClearVariables(void) | |
165 | { | |
166 | int i, j; /* Looping vars */ | |
167 | _cgi_var_t *v; /* Current variable */ | |
168 | ||
169 | ||
170 | fputs("DEBUG: cgiClearVariables called.\n", stderr); | |
171 | ||
172 | for (v = form_vars, i = form_count; i > 0; v ++, i --) | |
173 | { | |
174 | _cupsStrFree(v->name); | |
175 | for (j = 0; j < v->nvalues; j ++) | |
176 | if (v->values[j]) | |
177 | _cupsStrFree(v->values[j]); | |
178 | } | |
179 | ||
180 | form_count = 0; | |
181 | ||
182 | cgi_unlink_file(); | |
183 | } | |
184 | ||
185 | ||
186 | /* | |
187 | * 'cgiGetArray()' - Get an element from a form array. | |
188 | */ | |
189 | ||
190 | const char * /* O - Element value or NULL */ | |
191 | cgiGetArray(const char *name, /* I - Name of array variable */ | |
192 | int element) /* I - Element number (0 to N) */ | |
193 | { | |
194 | _cgi_var_t *var; /* Pointer to variable */ | |
195 | ||
196 | ||
197 | if ((var = cgi_find_variable(name)) == NULL) | |
198 | return (NULL); | |
199 | ||
200 | if (element < 0 || element >= var->nvalues) | |
201 | return (NULL); | |
202 | ||
203 | return (_cupsStrRetain(var->values[element])); | |
204 | } | |
205 | ||
206 | ||
207 | /* | |
208 | * 'cgiGetCookie()' - Get a cookie value. | |
209 | */ | |
210 | ||
211 | const char * /* O - Value or NULL */ | |
212 | cgiGetCookie(const char *name) /* I - Name of cookie */ | |
213 | { | |
214 | return (cupsGetOption(name, num_cookies, cookies)); | |
215 | } | |
216 | ||
217 | ||
218 | /* | |
219 | * 'cgiGetFile()' - Get the file (if any) that was submitted in the form. | |
220 | */ | |
221 | ||
222 | const cgi_file_t * /* O - Attached file or NULL */ | |
223 | cgiGetFile(void) | |
224 | { | |
225 | return (form_file); | |
226 | } | |
227 | ||
228 | ||
229 | /* | |
230 | * 'cgiGetSize()' - Get the size of a form array value. | |
231 | */ | |
232 | ||
233 | int /* O - Number of elements */ | |
234 | cgiGetSize(const char *name) /* I - Name of variable */ | |
235 | { | |
236 | _cgi_var_t *var; /* Pointer to variable */ | |
237 | ||
238 | ||
239 | if ((var = cgi_find_variable(name)) == NULL) | |
240 | return (0); | |
241 | ||
242 | return (var->nvalues); | |
243 | } | |
244 | ||
245 | ||
246 | /* | |
247 | * 'cgiGetVariable()' - Get a CGI variable from the database. | |
248 | * | |
249 | * Returns NULL if the variable doesn't exist. If the variable is an | |
250 | * array of values, returns the last element. | |
251 | */ | |
252 | ||
253 | const char * /* O - Value of variable */ | |
254 | cgiGetVariable(const char *name) /* I - Name of variable */ | |
255 | { | |
256 | const _cgi_var_t *var; /* Returned variable */ | |
257 | ||
258 | ||
259 | var = cgi_find_variable(name); | |
260 | ||
261 | #ifdef DEBUG | |
262 | if (var == NULL) | |
263 | DEBUG_printf(("cgiGetVariable(\"%s\") is returning NULL...\n", name)); | |
264 | else | |
265 | DEBUG_printf(("cgiGetVariable(\"%s\") is returning \"%s\"...\n", name, | |
266 | var->values[var->nvalues - 1])); | |
267 | #endif /* DEBUG */ | |
268 | ||
269 | return ((var == NULL) ? NULL : _cupsStrRetain(var->values[var->nvalues - 1])); | |
270 | } | |
271 | ||
272 | ||
273 | /* | |
274 | * 'cgiInitialize()' - Initialize the CGI variable "database". | |
275 | */ | |
276 | ||
277 | int /* O - Non-zero if there was form data */ | |
278 | cgiInitialize(void) | |
279 | { | |
280 | const char *method, /* Form posting method */ | |
281 | *content_type, /* Content-Type of post data */ | |
282 | *cups_sid_cookie, /* SID cookie */ | |
283 | *cups_sid_form; /* SID form variable */ | |
284 | ||
285 | ||
286 | /* | |
287 | * Setup a password callback for authentication... | |
288 | */ | |
289 | ||
290 | cupsSetPasswordCB(cgi_passwd); | |
291 | ||
292 | /* | |
293 | * Set the locale so that times, etc. are formatted properly... | |
294 | */ | |
295 | ||
296 | setlocale(LC_ALL, ""); | |
297 | ||
298 | #ifdef DEBUG | |
299 | /* | |
300 | * Disable output buffering to find bugs... | |
301 | */ | |
302 | ||
303 | setbuf(stdout, NULL); | |
304 | #endif /* DEBUG */ | |
305 | ||
306 | /* | |
307 | * Get cookies... | |
308 | */ | |
309 | ||
310 | cgi_initialize_cookies(); | |
311 | ||
312 | if ((cups_sid_cookie = cgiGetCookie(CUPS_SID)) == NULL) | |
313 | { | |
314 | fputs("DEBUG: " CUPS_SID " cookie not found, initializing!\n", stderr); | |
315 | cups_sid_cookie = cgi_set_sid(); | |
316 | } | |
317 | ||
318 | fprintf(stderr, "DEBUG: " CUPS_SID " cookie is \"%s\"\n", cups_sid_cookie); | |
319 | ||
320 | /* | |
321 | * Get the request method (GET or POST)... | |
322 | */ | |
323 | ||
324 | method = getenv("REQUEST_METHOD"); | |
325 | content_type = getenv("CONTENT_TYPE"); | |
326 | if (!method) | |
327 | return (0); | |
328 | ||
329 | /* | |
330 | * Grab form data from the corresponding location... | |
331 | */ | |
332 | ||
333 | if (!_cups_strcasecmp(method, "GET")) | |
334 | return (cgi_initialize_get()); | |
335 | else if (!_cups_strcasecmp(method, "POST") && content_type) | |
336 | { | |
337 | const char *boundary = strstr(content_type, "boundary="); | |
338 | ||
339 | if (boundary) | |
340 | boundary += 9; | |
341 | ||
342 | if (content_type && !strncmp(content_type, "multipart/form-data; ", 21)) | |
343 | { | |
344 | if (!cgi_initialize_multipart(boundary)) | |
345 | return (0); | |
346 | } | |
347 | else if (!cgi_initialize_post()) | |
348 | return (0); | |
349 | ||
350 | if ((cups_sid_form = cgiGetVariable(CUPS_SID)) == NULL || | |
351 | strcmp(cups_sid_cookie, cups_sid_form)) | |
352 | { | |
353 | if (cups_sid_form) | |
354 | fprintf(stderr, "DEBUG: " CUPS_SID " form variable is \"%s\"\n", | |
355 | cups_sid_form); | |
356 | else | |
357 | fputs("DEBUG: " CUPS_SID " form variable is not present.\n", stderr); | |
358 | ||
359 | cgiClearVariables(); | |
360 | return (0); | |
361 | } | |
362 | else | |
363 | return (1); | |
364 | } | |
365 | else | |
366 | return (0); | |
367 | } | |
368 | ||
369 | ||
370 | /* | |
371 | * 'cgiIsPOST()' - Determine whether this page was POSTed. | |
372 | */ | |
373 | ||
374 | int /* O - 1 if POST, 0 if GET */ | |
375 | cgiIsPOST(void) | |
376 | { | |
377 | const char *method; /* REQUEST_METHOD environment variable */ | |
378 | ||
379 | ||
380 | if ((method = getenv("REQUEST_METHOD")) == NULL) | |
381 | return (0); | |
382 | else | |
383 | return (!strcmp(method, "POST")); | |
384 | } | |
385 | ||
386 | ||
387 | /* | |
388 | * 'cgiSetArray()' - Set array element N to the specified string. | |
389 | * | |
390 | * If the variable array is smaller than (element + 1), the intervening | |
391 | * elements are set to NULL. | |
392 | */ | |
393 | ||
394 | void | |
395 | cgiSetArray(const char *name, /* I - Name of variable */ | |
396 | int element, /* I - Element number (0 to N) */ | |
397 | const char *value) /* I - Value of variable */ | |
398 | { | |
399 | int i; /* Looping var */ | |
400 | _cgi_var_t *var; /* Returned variable */ | |
401 | ||
402 | ||
403 | if (name == NULL || value == NULL || element < 0 || element > 100000) | |
404 | return; | |
405 | ||
406 | fprintf(stderr, "DEBUG: cgiSetArray: %s[%d]=\"%s\"\n", name, element, value); | |
407 | ||
408 | if ((var = cgi_find_variable(name)) == NULL) | |
409 | { | |
410 | cgi_add_variable(name, element, value); | |
411 | cgi_sort_variables(); | |
412 | } | |
413 | else | |
414 | { | |
415 | if (element >= var->avalues) | |
416 | { | |
417 | const char **temp; /* Temporary pointer */ | |
418 | ||
419 | temp = (const char **)realloc((void *)(var->values), | |
420 | sizeof(char *) * (element + 16)); | |
421 | if (!temp) | |
422 | return; | |
423 | ||
424 | var->avalues = element + 16; | |
425 | var->values = temp; | |
426 | } | |
427 | ||
428 | if (element >= var->nvalues) | |
429 | { | |
430 | for (i = var->nvalues; i < element; i ++) | |
431 | var->values[i] = NULL; | |
432 | ||
433 | var->nvalues = element + 1; | |
434 | } | |
435 | else if (var->values[element]) | |
436 | _cupsStrFree((char *)var->values[element]); | |
437 | ||
438 | var->values[element] = _cupsStrAlloc(value); | |
439 | } | |
440 | } | |
441 | ||
442 | ||
443 | /* | |
444 | * 'cgiSetCookie()' - Set a cookie value. | |
445 | */ | |
446 | ||
447 | void | |
448 | cgiSetCookie(const char *name, /* I - Name */ | |
449 | const char *value, /* I - Value */ | |
450 | const char *path, /* I - Path (typically "/") */ | |
451 | const char *domain, /* I - Domain name */ | |
452 | time_t expires, /* I - Expiration date (0 for session) */ | |
453 | int secure) /* I - Require SSL */ | |
454 | { | |
455 | num_cookies = cupsAddOption(name, value, num_cookies, &cookies); | |
456 | ||
457 | printf("Set-Cookie: %s=%s;", name, value); | |
458 | if (path) | |
459 | printf(" path=%s;", path); | |
460 | if (domain) | |
461 | printf(" domain=%s;", domain); | |
462 | if (expires) | |
463 | { | |
464 | char date[256]; /* Date string */ | |
465 | ||
466 | printf(" expires=%s;", httpGetDateString2(expires, date, sizeof(date))); | |
467 | } | |
468 | if (secure) | |
469 | puts(" secure;"); | |
470 | else | |
471 | putchar('\n'); | |
472 | } | |
473 | ||
474 | ||
475 | /* | |
476 | * 'cgiSetSize()' - Set the array size. | |
477 | */ | |
478 | ||
479 | void | |
480 | cgiSetSize(const char *name, /* I - Name of variable */ | |
481 | int size) /* I - Number of elements (0 to N) */ | |
482 | { | |
483 | int i; /* Looping var */ | |
484 | _cgi_var_t *var; /* Returned variable */ | |
485 | ||
486 | ||
487 | if (name == NULL || size < 0 || size > 100000) | |
488 | return; | |
489 | ||
490 | if ((var = cgi_find_variable(name)) == NULL) | |
491 | return; | |
492 | ||
493 | if (size >= var->avalues) | |
494 | { | |
495 | const char **temp; /* Temporary pointer */ | |
496 | ||
497 | temp = (const char **)realloc((void *)(var->values), | |
498 | sizeof(char *) * (size + 16)); | |
499 | if (!temp) | |
500 | return; | |
501 | ||
502 | var->avalues = size + 16; | |
503 | var->values = temp; | |
504 | } | |
505 | ||
506 | if (size > var->nvalues) | |
507 | { | |
508 | for (i = var->nvalues; i < size; i ++) | |
509 | var->values[i] = NULL; | |
510 | } | |
511 | else if (size < var->nvalues) | |
512 | { | |
513 | for (i = size; i < var->nvalues; i ++) | |
514 | if (var->values[i]) | |
515 | _cupsStrFree((void *)(var->values[i])); | |
516 | } | |
517 | ||
518 | var->nvalues = size; | |
519 | } | |
520 | ||
521 | ||
522 | /* | |
523 | * 'cgiSetVariable()' - Set a CGI variable in the database. | |
524 | * | |
525 | * If the variable is an array, this truncates the array to a single element. | |
526 | */ | |
527 | ||
528 | void | |
529 | cgiSetVariable(const char *name, /* I - Name of variable */ | |
530 | const char *value) /* I - Value of variable */ | |
531 | { | |
532 | int i; /* Looping var */ | |
533 | _cgi_var_t *var; /* Returned variable */ | |
534 | ||
535 | ||
536 | if (name == NULL || value == NULL) | |
537 | return; | |
538 | ||
539 | fprintf(stderr, "cgiSetVariable: %s=\"%s\"\n", name, value); | |
540 | ||
541 | if ((var = cgi_find_variable(name)) == NULL) | |
542 | { | |
543 | cgi_add_variable(name, 0, value); | |
544 | cgi_sort_variables(); | |
545 | } | |
546 | else | |
547 | { | |
548 | for (i = 0; i < var->nvalues; i ++) | |
549 | if (var->values[i]) | |
550 | _cupsStrFree((char *)var->values[i]); | |
551 | ||
552 | var->values[0] = _cupsStrAlloc(value); | |
553 | var->nvalues = 1; | |
554 | } | |
555 | } | |
556 | ||
557 | ||
558 | /* | |
559 | * 'cgi_add_variable()' - Add a form variable. | |
560 | */ | |
561 | ||
562 | static void | |
563 | cgi_add_variable(const char *name, /* I - Variable name */ | |
564 | int element, /* I - Array element number */ | |
565 | const char *value) /* I - Variable value */ | |
566 | { | |
567 | _cgi_var_t *var; /* New variable */ | |
568 | ||
569 | ||
570 | if (name == NULL || value == NULL || element < 0 || element > 100000) | |
571 | return; | |
572 | ||
573 | DEBUG_printf(("cgi_add_variable: Adding variable \'%s\' with value " | |
574 | "\'%s\'...\n", name, value)); | |
575 | ||
576 | if (form_count >= form_alloc) | |
577 | { | |
578 | _cgi_var_t *temp_vars; /* Temporary form pointer */ | |
579 | ||
580 | ||
581 | if (form_alloc == 0) | |
582 | temp_vars = malloc(sizeof(_cgi_var_t) * 16); | |
583 | else | |
584 | temp_vars = realloc(form_vars, (form_alloc + 16) * sizeof(_cgi_var_t)); | |
585 | ||
586 | if (!temp_vars) | |
587 | return; | |
588 | ||
589 | form_vars = temp_vars; | |
590 | form_alloc += 16; | |
591 | } | |
592 | ||
593 | var = form_vars + form_count; | |
594 | ||
595 | if ((var->values = calloc(element + 1, sizeof(char *))) == NULL) | |
596 | return; | |
597 | ||
598 | var->name = _cupsStrAlloc(name); | |
599 | var->nvalues = element + 1; | |
600 | var->avalues = element + 1; | |
601 | var->values[element] = _cupsStrAlloc(value); | |
602 | ||
603 | form_count ++; | |
604 | } | |
605 | ||
606 | ||
607 | /* | |
608 | * 'cgi_compare_variables()' - Compare two variables. | |
609 | */ | |
610 | ||
611 | static int /* O - Result of comparison */ | |
612 | cgi_compare_variables( | |
613 | const _cgi_var_t *v1, /* I - First variable */ | |
614 | const _cgi_var_t *v2) /* I - Second variable */ | |
615 | { | |
616 | return (_cups_strcasecmp(v1->name, v2->name)); | |
617 | } | |
618 | ||
619 | ||
620 | /* | |
621 | * 'cgi_find_variable()' - Find a variable. | |
622 | */ | |
623 | ||
624 | static _cgi_var_t * /* O - Variable pointer or NULL */ | |
625 | cgi_find_variable(const char *name) /* I - Name of variable */ | |
626 | { | |
627 | _cgi_var_t key; /* Search key */ | |
628 | ||
629 | ||
630 | if (form_count < 1 || name == NULL) | |
631 | return (NULL); | |
632 | ||
633 | key.name = name; | |
634 | ||
635 | return ((_cgi_var_t *)bsearch(&key, form_vars, form_count, sizeof(_cgi_var_t), | |
636 | (int (*)(const void *, const void *))cgi_compare_variables)); | |
637 | } | |
638 | ||
639 | ||
640 | /* | |
641 | * 'cgi_initialize_cookies()' - Initialize cookies. | |
642 | */ | |
643 | ||
644 | static void | |
645 | cgi_initialize_cookies(void) | |
646 | { | |
647 | const char *cookie; /* HTTP_COOKIE environment variable */ | |
648 | char name[128], /* Name string */ | |
649 | value[512], /* Value string */ | |
650 | *ptr; /* Pointer into name/value */ | |
651 | ||
652 | ||
653 | if ((cookie = getenv("HTTP_COOKIE")) == NULL) | |
654 | return; | |
655 | ||
656 | while (*cookie) | |
657 | { | |
658 | /* | |
659 | * Skip leading whitespace... | |
660 | */ | |
661 | ||
662 | while (isspace(*cookie & 255)) | |
663 | cookie ++; | |
664 | if (!*cookie) | |
665 | break; | |
666 | ||
667 | /* | |
668 | * Copy the name... | |
669 | */ | |
670 | ||
671 | for (ptr = name; *cookie && *cookie != '=';) | |
672 | if (ptr < (name + sizeof(name) - 1)) | |
673 | *ptr++ = *cookie++; | |
674 | else | |
675 | break; | |
676 | ||
677 | if (*cookie != '=') | |
678 | break; | |
679 | ||
680 | *ptr = '\0'; | |
681 | cookie ++; | |
682 | ||
683 | /* | |
684 | * Then the value... | |
685 | */ | |
686 | ||
687 | if (*cookie == '\"') | |
688 | { | |
689 | for (cookie ++, ptr = value; *cookie && *cookie != '\"';) | |
690 | if (ptr < (value + sizeof(value) - 1)) | |
691 | *ptr++ = *cookie++; | |
692 | else | |
693 | break; | |
694 | ||
695 | if (*cookie == '\"') | |
696 | cookie ++; | |
697 | } | |
698 | else | |
699 | { | |
700 | for (ptr = value; *cookie && *cookie != ';';) | |
701 | if (ptr < (value + sizeof(value) - 1)) | |
702 | *ptr++ = *cookie++; | |
703 | else | |
704 | break; | |
705 | } | |
706 | ||
707 | if (*cookie == ';') | |
708 | cookie ++; | |
709 | else if (*cookie) | |
710 | break; | |
711 | ||
712 | *ptr = '\0'; | |
713 | ||
714 | /* | |
715 | * Then add the cookie to an array as long as the name doesn't start with | |
716 | * "$"... | |
717 | */ | |
718 | ||
719 | if (name[0] != '$') | |
720 | num_cookies = cupsAddOption(name, value, num_cookies, &cookies); | |
721 | } | |
722 | } | |
723 | ||
724 | ||
725 | /* | |
726 | * 'cgi_initialize_get()' - Initialize form variables using the GET method. | |
727 | */ | |
728 | ||
729 | static int /* O - 1 if form data read */ | |
730 | cgi_initialize_get(void) | |
731 | { | |
732 | char *data; /* Pointer to form data string */ | |
733 | ||
734 | ||
735 | DEBUG_puts("cgi_initialize_get: Initializing variables using GET method..."); | |
736 | ||
737 | /* | |
738 | * Check to see if there is anything for us to read... | |
739 | */ | |
740 | ||
741 | data = getenv("QUERY_STRING"); | |
742 | if (data == NULL || strlen(data) == 0) | |
743 | return (0); | |
744 | ||
745 | /* | |
746 | * Parse it out and return... | |
747 | */ | |
748 | ||
749 | return (cgi_initialize_string(data)); | |
750 | } | |
751 | ||
752 | ||
753 | /* | |
754 | * 'cgi_initialize_multipart()' - Initialize variables and file using the POST | |
755 | * method. | |
756 | * | |
757 | * TODO: Update to support files > 2GB. | |
758 | */ | |
759 | ||
760 | static int /* O - 1 if form data was read */ | |
761 | cgi_initialize_multipart( | |
762 | const char *boundary) /* I - Boundary string */ | |
763 | { | |
764 | char line[10240], /* MIME header line */ | |
765 | name[1024], /* Form variable name */ | |
766 | filename[1024], /* Form filename */ | |
767 | mimetype[1024], /* MIME media type */ | |
768 | bstring[256], /* Boundary string to look for */ | |
769 | *ptr, /* Pointer into name/filename */ | |
770 | *end; /* End of buffer */ | |
771 | int ch, /* Character from file */ | |
772 | fd, /* Temporary file descriptor */ | |
773 | blen; /* Length of boundary string */ | |
774 | ||
775 | ||
776 | DEBUG_printf(("cgi_initialize_multipart(boundary=\"%s\")\n", boundary)); | |
777 | ||
778 | /* | |
779 | * Read multipart form data until we run out... | |
780 | */ | |
781 | ||
782 | name[0] = '\0'; | |
783 | filename[0] = '\0'; | |
784 | mimetype[0] = '\0'; | |
785 | ||
786 | snprintf(bstring, sizeof(bstring), "\r\n--%s", boundary); | |
787 | blen = strlen(bstring); | |
788 | ||
789 | while (fgets(line, sizeof(line), stdin)) | |
790 | { | |
791 | if (!strcmp(line, "\r\n")) | |
792 | { | |
793 | /* | |
794 | * End of headers, grab value... | |
795 | */ | |
796 | ||
797 | if (filename[0]) | |
798 | { | |
799 | /* | |
800 | * Read an embedded file... | |
801 | */ | |
802 | ||
803 | if (form_file) | |
804 | { | |
805 | /* | |
806 | * Remove previous file... | |
807 | */ | |
808 | ||
809 | cgi_unlink_file(); | |
810 | } | |
811 | ||
812 | /* | |
813 | * Allocate memory for the new file... | |
814 | */ | |
815 | ||
816 | if ((form_file = calloc(1, sizeof(cgi_file_t))) == NULL) | |
817 | return (0); | |
818 | ||
819 | form_file->name = strdup(name); | |
820 | form_file->filename = strdup(filename); | |
821 | form_file->mimetype = strdup(mimetype); | |
822 | ||
823 | fd = cupsTempFd(form_file->tempfile, sizeof(form_file->tempfile)); | |
824 | ||
825 | if (fd < 0) | |
826 | return (0); | |
827 | ||
828 | atexit(cgi_unlink_file); | |
829 | ||
830 | /* | |
831 | * Copy file data to the temp file... | |
832 | */ | |
833 | ||
834 | ptr = line; | |
835 | ||
836 | while ((ch = getchar()) != EOF) | |
837 | { | |
838 | *ptr++ = ch; | |
839 | ||
840 | if ((ptr - line) >= blen && !memcmp(ptr - blen, bstring, blen)) | |
841 | { | |
842 | ptr -= blen; | |
843 | break; | |
844 | } | |
845 | ||
846 | if ((ptr - line - blen) >= 8192) | |
847 | { | |
848 | /* | |
849 | * Write out the first 8k of the buffer... | |
850 | */ | |
851 | ||
852 | write(fd, line, 8192); | |
853 | memmove(line, line + 8192, ptr - line - 8192); | |
854 | ptr -= 8192; | |
855 | } | |
856 | } | |
857 | ||
858 | /* | |
859 | * Write the rest of the data and close the temp file... | |
860 | */ | |
861 | ||
862 | if (ptr > line) | |
863 | write(fd, line, ptr - line); | |
864 | ||
865 | close(fd); | |
866 | } | |
867 | else | |
868 | { | |
869 | /* | |
870 | * Just get a form variable; the current code only handles | |
871 | * form values up to 10k in size... | |
872 | */ | |
873 | ||
874 | ptr = line; | |
875 | end = line + sizeof(line) - 1; | |
876 | ||
877 | while ((ch = getchar()) != EOF) | |
878 | { | |
879 | if (ptr < end) | |
880 | *ptr++ = ch; | |
881 | ||
882 | if ((ptr - line) >= blen && !memcmp(ptr - blen, bstring, blen)) | |
883 | { | |
884 | ptr -= blen; | |
885 | break; | |
886 | } | |
887 | } | |
888 | ||
889 | *ptr = '\0'; | |
890 | ||
891 | /* | |
892 | * Set the form variable... | |
893 | */ | |
894 | ||
895 | if ((ptr = strrchr(name, '-')) != NULL && isdigit(ptr[1] & 255)) | |
896 | { | |
897 | /* | |
898 | * Set a specific index in the array... | |
899 | */ | |
900 | ||
901 | *ptr++ = '\0'; | |
902 | if (line[0]) | |
903 | cgiSetArray(name, atoi(ptr) - 1, line); | |
904 | } | |
905 | else if (cgiGetVariable(name)) | |
906 | { | |
907 | /* | |
908 | * Add another element in the array... | |
909 | */ | |
910 | ||
911 | cgiSetArray(name, cgiGetSize(name), line); | |
912 | } | |
913 | else | |
914 | { | |
915 | /* | |
916 | * Just set the line... | |
917 | */ | |
918 | ||
919 | cgiSetVariable(name, line); | |
920 | } | |
921 | } | |
922 | ||
923 | /* | |
924 | * Read the rest of the current line... | |
925 | */ | |
926 | ||
927 | fgets(line, sizeof(line), stdin); | |
928 | ||
929 | /* | |
930 | * Clear the state vars... | |
931 | */ | |
932 | ||
933 | name[0] = '\0'; | |
934 | filename[0] = '\0'; | |
935 | mimetype[0] = '\0'; | |
936 | } | |
937 | else if (!_cups_strncasecmp(line, "Content-Disposition:", 20)) | |
938 | { | |
939 | if ((ptr = strstr(line + 20, " name=\"")) != NULL) | |
940 | { | |
941 | strlcpy(name, ptr + 7, sizeof(name)); | |
942 | ||
943 | if ((ptr = strchr(name, '\"')) != NULL) | |
944 | *ptr = '\0'; | |
945 | } | |
946 | ||
947 | if ((ptr = strstr(line + 20, " filename=\"")) != NULL) | |
948 | { | |
949 | strlcpy(filename, ptr + 11, sizeof(filename)); | |
950 | ||
951 | if ((ptr = strchr(filename, '\"')) != NULL) | |
952 | *ptr = '\0'; | |
953 | } | |
954 | } | |
955 | else if (!_cups_strncasecmp(line, "Content-Type:", 13)) | |
956 | { | |
957 | for (ptr = line + 13; isspace(*ptr & 255); ptr ++); | |
958 | ||
959 | strlcpy(mimetype, ptr, sizeof(mimetype)); | |
960 | ||
961 | for (ptr = mimetype + strlen(mimetype) - 1; | |
962 | ptr > mimetype && isspace(*ptr & 255); | |
963 | *ptr-- = '\0'); | |
964 | } | |
965 | } | |
966 | ||
967 | /* | |
968 | * Return 1 for "form data found"... | |
969 | */ | |
970 | ||
971 | return (1); | |
972 | } | |
973 | ||
974 | ||
975 | /* | |
976 | * 'cgi_initialize_post()' - Initialize variables using the POST method. | |
977 | */ | |
978 | ||
979 | static int /* O - 1 if form data was read */ | |
980 | cgi_initialize_post(void) | |
981 | { | |
982 | char *content_length, /* Length of input data (string) */ | |
983 | *data; /* Pointer to form data string */ | |
984 | int length, /* Length of input data */ | |
985 | nbytes, /* Number of bytes read this read() */ | |
986 | tbytes, /* Total number of bytes read */ | |
987 | status; /* Return status */ | |
988 | ||
989 | ||
990 | DEBUG_puts("cgi_initialize_post: Initializing variables using POST method..."); | |
991 | ||
992 | /* | |
993 | * Check to see if there is anything for us to read... | |
994 | */ | |
995 | ||
996 | content_length = getenv("CONTENT_LENGTH"); | |
997 | if (content_length == NULL || atoi(content_length) <= 0) | |
998 | return (0); | |
999 | ||
1000 | /* | |
1001 | * Get the length of the input stream and allocate a buffer for it... | |
1002 | */ | |
1003 | ||
1004 | length = atoi(content_length); | |
1005 | data = malloc(length + 1); | |
1006 | ||
1007 | if (data == NULL) | |
1008 | return (0); | |
1009 | ||
1010 | /* | |
1011 | * Read the data into the buffer... | |
1012 | */ | |
1013 | ||
1014 | for (tbytes = 0; tbytes < length; tbytes += nbytes) | |
1015 | if ((nbytes = read(0, data + tbytes, length - tbytes)) < 0) | |
1016 | { | |
1017 | if (errno != EAGAIN) | |
1018 | { | |
1019 | free(data); | |
1020 | return (0); | |
1021 | } | |
1022 | else | |
1023 | nbytes = 0; | |
1024 | } | |
1025 | else if (nbytes == 0) | |
1026 | { | |
1027 | /* | |
1028 | * CUPS STR #3176: OpenBSD: Early end-of-file on POST data causes 100% CPU | |
1029 | * | |
1030 | * This should never happen, but does on OpenBSD. If we see early end-of- | |
1031 | * file, treat this as an error and process no data. | |
1032 | */ | |
1033 | ||
1034 | free(data); | |
1035 | return (0); | |
1036 | } | |
1037 | ||
1038 | data[length] = '\0'; | |
1039 | ||
1040 | /* | |
1041 | * Parse it out... | |
1042 | */ | |
1043 | ||
1044 | status = cgi_initialize_string(data); | |
1045 | ||
1046 | /* | |
1047 | * Free the data and return... | |
1048 | */ | |
1049 | ||
1050 | free(data); | |
1051 | ||
1052 | return (status); | |
1053 | } | |
1054 | ||
1055 | ||
1056 | /* | |
1057 | * 'cgi_initialize_string()' - Initialize form variables from a string. | |
1058 | */ | |
1059 | ||
1060 | static int /* O - 1 if form data was processed */ | |
1061 | cgi_initialize_string(const char *data) /* I - Form data string */ | |
1062 | { | |
1063 | int done; /* True if we're done reading a form variable */ | |
1064 | char *s, /* Pointer to current form string */ | |
1065 | ch, /* Temporary character */ | |
1066 | name[255], /* Name of form variable */ | |
1067 | value[65536]; /* Variable value */ | |
1068 | ||
1069 | ||
1070 | /* | |
1071 | * Check input... | |
1072 | */ | |
1073 | ||
1074 | if (data == NULL) | |
1075 | return (0); | |
1076 | ||
1077 | /* | |
1078 | * Loop until we've read all the form data... | |
1079 | */ | |
1080 | ||
1081 | while (*data != '\0') | |
1082 | { | |
1083 | /* | |
1084 | * Get the variable name... | |
1085 | */ | |
1086 | ||
1087 | for (s = name; *data != '\0'; data ++) | |
1088 | if (*data == '=') | |
1089 | break; | |
1090 | else if (*data >= ' ' && s < (name + sizeof(name) - 1)) | |
1091 | *s++ = *data; | |
1092 | ||
1093 | *s = '\0'; | |
1094 | if (*data == '=') | |
1095 | data ++; | |
1096 | else | |
1097 | return (0); | |
1098 | ||
1099 | /* | |
1100 | * Read the variable value... | |
1101 | */ | |
1102 | ||
1103 | for (s = value, done = 0; !done && *data != '\0'; data ++) | |
1104 | switch (*data) | |
1105 | { | |
1106 | case '&' : /* End of data... */ | |
1107 | done = 1; | |
1108 | break; | |
1109 | ||
1110 | case '+' : /* Escaped space character */ | |
1111 | if (s < (value + sizeof(value) - 1)) | |
1112 | *s++ = ' '; | |
1113 | break; | |
1114 | ||
1115 | case '%' : /* Escaped control character */ | |
1116 | /* | |
1117 | * Read the hex code... | |
1118 | */ | |
1119 | ||
1120 | if (!isxdigit(data[1] & 255) || !isxdigit(data[2] & 255)) | |
1121 | return (0); | |
1122 | ||
1123 | if (s < (value + sizeof(value) - 1)) | |
1124 | { | |
1125 | data ++; | |
1126 | ch = *data - '0'; | |
1127 | if (ch > 9) | |
1128 | ch -= 7; | |
1129 | *s = ch << 4; | |
1130 | ||
1131 | data ++; | |
1132 | ch = *data - '0'; | |
1133 | if (ch > 9) | |
1134 | ch -= 7; | |
1135 | *s++ |= ch; | |
1136 | } | |
1137 | else | |
1138 | data += 2; | |
1139 | break; | |
1140 | ||
1141 | default : /* Other characters come straight through */ | |
1142 | if (*data >= ' ' && s < (value + sizeof(value) - 1)) | |
1143 | *s++ = *data; | |
1144 | break; | |
1145 | } | |
1146 | ||
1147 | *s = '\0'; /* nul terminate the string */ | |
1148 | ||
1149 | /* | |
1150 | * Remove trailing whitespace... | |
1151 | */ | |
1152 | ||
1153 | if (s > value) | |
1154 | s --; | |
1155 | ||
1156 | while (s >= value && isspace(*s & 255)) | |
1157 | *s-- = '\0'; | |
1158 | ||
1159 | /* | |
1160 | * Add the string to the variable "database"... | |
1161 | */ | |
1162 | ||
1163 | if ((s = strrchr(name, '-')) != NULL && isdigit(s[1] & 255)) | |
1164 | { | |
1165 | *s++ = '\0'; | |
1166 | if (value[0]) | |
1167 | cgiSetArray(name, atoi(s) - 1, value); | |
1168 | } | |
1169 | else if (cgiGetVariable(name) != NULL) | |
1170 | cgiSetArray(name, cgiGetSize(name), value); | |
1171 | else | |
1172 | cgiSetVariable(name, value); | |
1173 | } | |
1174 | ||
1175 | return (1); | |
1176 | } | |
1177 | ||
1178 | ||
1179 | /* | |
1180 | * 'cgi_passwd()' - Catch authentication requests and notify the server. | |
1181 | * | |
1182 | * This function sends a Status header and exits, forcing authentication | |
1183 | * for this request. | |
1184 | */ | |
1185 | ||
1186 | static const char * /* O - NULL (no return) */ | |
1187 | cgi_passwd(const char *prompt) /* I - Prompt (not used) */ | |
1188 | { | |
1189 | (void)prompt; | |
1190 | ||
1191 | fprintf(stderr, "DEBUG: cgi_passwd(prompt=\"%s\") called!\n", | |
1192 | prompt ? prompt : "(null)"); | |
1193 | ||
1194 | /* | |
1195 | * Send a 401 (unauthorized) status to the server, so it can notify | |
1196 | * the client that authentication is required. | |
1197 | */ | |
1198 | ||
1199 | puts("Status: 401\n"); | |
1200 | exit(0); | |
1201 | ||
1202 | /* | |
1203 | * This code is never executed, but is present to satisfy the compiler. | |
1204 | */ | |
1205 | ||
1206 | return (NULL); | |
1207 | } | |
1208 | ||
1209 | ||
1210 | /* | |
1211 | * 'cgi_set_sid()' - Set the CUPS session ID. | |
1212 | */ | |
1213 | ||
1214 | static const char * /* O - New session ID */ | |
1215 | cgi_set_sid(void) | |
1216 | { | |
1217 | char buffer[512], /* SID data */ | |
1218 | sid[33]; /* SID string */ | |
1219 | _cups_md5_state_t md5; /* MD5 state */ | |
1220 | unsigned char sum[16]; /* MD5 sum */ | |
1221 | const char *remote_addr, /* REMOTE_ADDR */ | |
1222 | *server_name, /* SERVER_NAME */ | |
1223 | *server_port; /* SERVER_PORT */ | |
1224 | ||
1225 | ||
1226 | if ((remote_addr = getenv("REMOTE_ADDR")) == NULL) | |
1227 | remote_addr = "REMOTE_ADDR"; | |
1228 | if ((server_name = getenv("SERVER_NAME")) == NULL) | |
1229 | server_name = "SERVER_NAME"; | |
1230 | if ((server_port = getenv("SERVER_PORT")) == NULL) | |
1231 | server_port = "SERVER_PORT"; | |
1232 | ||
1233 | CUPS_SRAND(time(NULL)); | |
1234 | snprintf(buffer, sizeof(buffer), "%s:%s:%s:%02X%02X%02X%02X%02X%02X%02X%02X", | |
1235 | remote_addr, server_name, server_port, | |
1236 | (unsigned)CUPS_RAND() & 255, (unsigned)CUPS_RAND() & 255, | |
1237 | (unsigned)CUPS_RAND() & 255, (unsigned)CUPS_RAND() & 255, | |
1238 | (unsigned)CUPS_RAND() & 255, (unsigned)CUPS_RAND() & 255, | |
1239 | (unsigned)CUPS_RAND() & 255, (unsigned)CUPS_RAND() & 255); | |
1240 | _cupsMD5Init(&md5); | |
1241 | _cupsMD5Append(&md5, (unsigned char *)buffer, (int)strlen(buffer)); | |
1242 | _cupsMD5Finish(&md5, sum); | |
1243 | ||
1244 | cgiSetCookie(CUPS_SID, httpMD5String(sum, sid), "/", NULL, 0, 0); | |
1245 | ||
1246 | return (cupsGetOption(CUPS_SID, num_cookies, cookies)); | |
1247 | } | |
1248 | ||
1249 | ||
1250 | /* | |
1251 | * 'cgi_sort_variables()' - Sort all form variables for faster lookup. | |
1252 | */ | |
1253 | ||
1254 | static void | |
1255 | cgi_sort_variables(void) | |
1256 | { | |
1257 | #ifdef DEBUG | |
1258 | int i; | |
1259 | ||
1260 | ||
1261 | DEBUG_puts("cgi_sort_variables: Sorting variables..."); | |
1262 | #endif /* DEBUG */ | |
1263 | ||
1264 | if (form_count < 2) | |
1265 | return; | |
1266 | ||
1267 | qsort(form_vars, form_count, sizeof(_cgi_var_t), | |
1268 | (int (*)(const void *, const void *))cgi_compare_variables); | |
1269 | ||
1270 | #ifdef DEBUG | |
1271 | DEBUG_puts("cgi_sort_variables: Sorted variable list is:"); | |
1272 | for (i = 0; i < form_count; i ++) | |
1273 | DEBUG_printf(("cgi_sort_variables: %d: %s (%d) = \"%s\" ...\n", i, | |
1274 | form_vars[i].name, form_vars[i].nvalues, | |
1275 | form_vars[i].values[0])); | |
1276 | #endif /* DEBUG */ | |
1277 | } | |
1278 | ||
1279 | ||
1280 | /* | |
1281 | * 'cgi_unlink_file()' - Remove the uploaded form. | |
1282 | */ | |
1283 | ||
1284 | static void | |
1285 | cgi_unlink_file(void) | |
1286 | { | |
1287 | if (form_file) | |
1288 | { | |
1289 | /* | |
1290 | * Remove the temporary file... | |
1291 | */ | |
1292 | ||
1293 | unlink(form_file->tempfile); | |
1294 | ||
1295 | /* | |
1296 | * Free memory used... | |
1297 | */ | |
1298 | ||
1299 | free(form_file->name); | |
1300 | free(form_file->filename); | |
1301 | free(form_file->mimetype); | |
1302 | free(form_file); | |
1303 | ||
1304 | form_file = NULL; | |
1305 | } | |
1306 | } | |
1307 | ||
1308 | ||
1309 | /* | |
1310 | * End of "$Id$". | |
1311 | */ |