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1a18c85c | 1 | /* |
5d2cc5d3 | 2 | * "$Id: tls-gnutls.c 12125 2014-08-28 15:49:29Z msweet $" |
1a18c85c MS |
3 | * |
4 | * TLS support code for CUPS using GNU TLS. | |
5 | * | |
6 | * Copyright 2007-2014 by Apple Inc. | |
7 | * Copyright 1997-2007 by Easy Software Products, all rights reserved. | |
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 | * This file is subject to the Apple OS-Developed Software exception. | |
16 | */ | |
17 | ||
18 | ||
19 | /* | |
20 | * Include necessary headers... | |
21 | */ | |
22 | ||
23 | #include <sys/stat.h> | |
24 | ||
25 | ||
26 | /* | |
27 | * Local globals... | |
28 | */ | |
29 | ||
30 | static int tls_auto_create = 0; | |
31 | /* Auto-create self-signed certs? */ | |
32 | static char *tls_common_name = NULL; | |
33 | /* Default common name */ | |
34 | static char *tls_keypath = NULL; | |
35 | /* Server cert keychain path */ | |
36 | static _cups_mutex_t tls_mutex = _CUPS_MUTEX_INITIALIZER; | |
37 | /* Mutex for keychain/certs */ | |
38 | ||
39 | ||
40 | /* | |
41 | * Local functions... | |
42 | */ | |
43 | ||
44 | static gnutls_x509_crt_t http_gnutls_create_credential(http_credential_t *credential); | |
45 | static const char *http_gnutls_default_path(char *buffer, size_t bufsize); | |
46 | static const char *http_gnutls_make_path(char *buffer, size_t bufsize, const char *dirname, const char *filename, const char *ext); | |
47 | static ssize_t http_gnutls_read(gnutls_transport_ptr_t ptr, void *data, size_t length); | |
48 | static ssize_t http_gnutls_write(gnutls_transport_ptr_t ptr, const void *data, size_t length); | |
49 | ||
50 | ||
51 | /* | |
52 | * 'cupsMakeServerCredentials()' - Make a self-signed certificate and private key pair. | |
53 | * | |
5d2cc5d3 | 54 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
55 | */ |
56 | ||
57 | int /* O - 1 on success, 0 on failure */ | |
58 | cupsMakeServerCredentials( | |
59 | const char *path, /* I - Path to keychain/directory */ | |
60 | const char *common_name, /* I - Common name */ | |
61 | int num_alt_names, /* I - Number of subject alternate names */ | |
62 | const char **alt_names, /* I - Subject Alternate Names */ | |
63 | time_t expiration_date) /* I - Expiration date */ | |
64 | { | |
65 | gnutls_x509_crt_t crt; /* Self-signed certificate */ | |
66 | gnutls_x509_privkey_t key; /* Encryption private key */ | |
67 | char temp[1024], /* Temporary directory name */ | |
68 | crtfile[1024], /* Certificate filename */ | |
69 | keyfile[1024]; /* Private key filename */ | |
70 | cups_lang_t *language; /* Default language info */ | |
71 | cups_file_t *fp; /* Key/cert file */ | |
72 | unsigned char buffer[8192]; /* Buffer for x509 data */ | |
73 | size_t bytes; /* Number of bytes of data */ | |
74 | unsigned char serial[4]; /* Serial number buffer */ | |
75 | time_t curtime; /* Current time */ | |
76 | int result; /* Result of GNU TLS calls */ | |
77 | ||
78 | ||
79 | DEBUG_printf(("cupsMakeServerCredentials(path=\"%s\", common_name=\"%s\", num_alt_names=%d, alt_names=%p, expiration_date=%d)", path, common_name, num_alt_names, alt_names, (int)expiration_date)); | |
80 | ||
81 | /* | |
82 | * Filenames... | |
83 | */ | |
84 | ||
85 | if (!path) | |
86 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
87 | ||
88 | if (!path || !common_name) | |
89 | { | |
90 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0); | |
91 | return (0); | |
92 | } | |
93 | ||
94 | http_gnutls_make_path(crtfile, sizeof(crtfile), path, common_name, "crt"); | |
95 | http_gnutls_make_path(keyfile, sizeof(keyfile), path, common_name, "key"); | |
96 | ||
97 | /* | |
98 | * Create the encryption key... | |
99 | */ | |
100 | ||
101 | DEBUG_puts("1cupsMakeServerCredentials: Creating key pair."); | |
102 | ||
103 | gnutls_x509_privkey_init(&key); | |
104 | gnutls_x509_privkey_generate(key, GNUTLS_PK_RSA, 2048, 0); | |
105 | ||
106 | DEBUG_puts("1cupsMakeServerCredentials: Key pair created."); | |
107 | ||
108 | /* | |
109 | * Save it... | |
110 | */ | |
111 | ||
112 | bytes = sizeof(buffer); | |
113 | ||
114 | if ((result = gnutls_x509_privkey_export(key, GNUTLS_X509_FMT_PEM, buffer, &bytes)) < 0) | |
115 | { | |
116 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to export private key: %s", gnutls_strerror(result))); | |
117 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(result), 0); | |
118 | gnutls_x509_privkey_deinit(key); | |
119 | return (0); | |
120 | } | |
121 | else if ((fp = cupsFileOpen(keyfile, "w")) != NULL) | |
122 | { | |
123 | DEBUG_printf(("1cupsMakeServerCredentials: Writing private key to \"%s\".", keyfile)); | |
124 | cupsFileWrite(fp, (char *)buffer, bytes); | |
125 | cupsFileClose(fp); | |
126 | } | |
127 | else | |
128 | { | |
129 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to create private key file \"%s\": %s", keyfile, strerror(errno))); | |
130 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); | |
131 | gnutls_x509_privkey_deinit(key); | |
132 | return (0); | |
133 | } | |
134 | ||
135 | /* | |
136 | * Create the self-signed certificate... | |
137 | */ | |
138 | ||
139 | DEBUG_puts("1cupsMakeServerCredentials: Generating self-signed X.509 certificate."); | |
140 | ||
141 | language = cupsLangDefault(); | |
142 | curtime = time(NULL); | |
143 | serial[0] = curtime >> 24; | |
144 | serial[1] = curtime >> 16; | |
145 | serial[2] = curtime >> 8; | |
146 | serial[3] = curtime; | |
147 | ||
148 | gnutls_x509_crt_init(&crt); | |
149 | if (strlen(language->language) == 5) | |
150 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0, | |
151 | language->language + 3, 2); | |
152 | else | |
153 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0, | |
154 | "US", 2); | |
155 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0, | |
156 | common_name, strlen(common_name)); | |
157 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATION_NAME, 0, | |
158 | common_name, strlen(common_name)); | |
159 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATIONAL_UNIT_NAME, | |
160 | 0, "Unknown", 7); | |
161 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_STATE_OR_PROVINCE_NAME, 0, | |
162 | "Unknown", 7); | |
163 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_LOCALITY_NAME, 0, | |
164 | "Unknown", 7); | |
165 | /* gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_PKCS9_EMAIL, 0, | |
166 | ServerAdmin, strlen(ServerAdmin));*/ | |
167 | gnutls_x509_crt_set_key(crt, key); | |
168 | gnutls_x509_crt_set_serial(crt, serial, sizeof(serial)); | |
169 | gnutls_x509_crt_set_activation_time(crt, curtime); | |
170 | gnutls_x509_crt_set_expiration_time(crt, curtime + 10 * 365 * 86400); | |
171 | gnutls_x509_crt_set_ca_status(crt, 0); | |
172 | if (num_alt_names > 0) | |
173 | gnutls_x509_crt_set_subject_alternative_name(crt, GNUTLS_SAN_DNSNAME, alt_names[0]); | |
174 | gnutls_x509_crt_set_key_purpose_oid(crt, GNUTLS_KP_TLS_WWW_SERVER, 0); | |
175 | gnutls_x509_crt_set_key_usage(crt, GNUTLS_KEY_KEY_ENCIPHERMENT); | |
176 | gnutls_x509_crt_set_version(crt, 3); | |
177 | ||
178 | bytes = sizeof(buffer); | |
179 | if (gnutls_x509_crt_get_key_id(crt, 0, buffer, &bytes) >= 0) | |
180 | gnutls_x509_crt_set_subject_key_id(crt, buffer, bytes); | |
181 | ||
182 | gnutls_x509_crt_sign(crt, crt, key); | |
183 | ||
184 | /* | |
185 | * Save it... | |
186 | */ | |
187 | ||
188 | bytes = sizeof(buffer); | |
189 | if ((result = gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, buffer, &bytes)) < 0) | |
190 | { | |
191 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to export public key and X.509 certificate: %s", gnutls_strerror(result))); | |
192 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(result), 0); | |
193 | gnutls_x509_crt_deinit(crt); | |
194 | gnutls_x509_privkey_deinit(key); | |
195 | return (0); | |
196 | } | |
197 | else if ((fp = cupsFileOpen(crtfile, "w")) != NULL) | |
198 | { | |
199 | DEBUG_printf(("1cupsMakeServerCredentials: Writing public key and X.509 certificate to \"%s\".", crtfile)); | |
200 | cupsFileWrite(fp, (char *)buffer, bytes); | |
201 | cupsFileClose(fp); | |
202 | } | |
203 | else | |
204 | { | |
205 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to create public key and X.509 certificate file \"%s\": %s", crtfile, strerror(errno))); | |
206 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); | |
207 | gnutls_x509_crt_deinit(crt); | |
208 | gnutls_x509_privkey_deinit(key); | |
209 | return (0); | |
210 | } | |
211 | ||
212 | /* | |
213 | * Cleanup... | |
214 | */ | |
215 | ||
216 | gnutls_x509_crt_deinit(crt); | |
217 | gnutls_x509_privkey_deinit(key); | |
218 | ||
219 | DEBUG_puts("1cupsMakeServerCredentials: Successfully created credentials."); | |
220 | ||
221 | return (1); | |
222 | } | |
223 | ||
224 | ||
225 | /* | |
226 | * 'cupsSetServerCredentials()' - Set the default server credentials. | |
227 | * | |
228 | * Note: The server credentials are used by all threads in the running process. | |
229 | * This function is threadsafe. | |
230 | * | |
5d2cc5d3 | 231 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
232 | */ |
233 | ||
234 | int /* O - 1 on success, 0 on failure */ | |
235 | cupsSetServerCredentials( | |
236 | const char *path, /* I - Path to keychain/directory */ | |
237 | const char *common_name, /* I - Default common name for server */ | |
238 | int auto_create) /* I - 1 = automatically create self-signed certificates */ | |
239 | { | |
240 | char temp[1024]; /* Default path buffer */ | |
241 | ||
242 | ||
243 | DEBUG_printf(("cupsSetServerCredentials(path=\"%s\", common_name=\"%s\", auto_create=%d)", path, common_name, auto_create)); | |
244 | ||
245 | /* | |
246 | * Use defaults as needed... | |
247 | */ | |
248 | ||
249 | if (!path) | |
250 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
251 | ||
252 | /* | |
253 | * Range check input... | |
254 | */ | |
255 | ||
256 | if (!path || !common_name) | |
257 | { | |
258 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0); | |
259 | return (0); | |
260 | } | |
261 | ||
262 | _cupsMutexLock(&tls_mutex); | |
263 | ||
264 | /* | |
265 | * Free old values... | |
266 | */ | |
267 | ||
268 | if (tls_keypath) | |
269 | _cupsStrFree(tls_keypath); | |
270 | ||
271 | if (tls_common_name) | |
272 | _cupsStrFree(tls_common_name); | |
273 | ||
274 | /* | |
275 | * Save the new values... | |
276 | */ | |
277 | ||
278 | tls_keypath = _cupsStrAlloc(path); | |
279 | tls_auto_create = auto_create; | |
280 | tls_common_name = _cupsStrAlloc(common_name); | |
281 | ||
282 | _cupsMutexUnlock(&tls_mutex); | |
283 | ||
284 | return (1); | |
285 | } | |
286 | ||
287 | ||
288 | /* | |
289 | * 'httpCopyCredentials()' - Copy the credentials associated with the peer in | |
290 | * an encrypted connection. | |
291 | * | |
292 | * @since CUPS 1.5/OS X 10.7@ | |
293 | */ | |
294 | ||
295 | int /* O - Status of call (0 = success) */ | |
296 | httpCopyCredentials( | |
297 | http_t *http, /* I - Connection to server */ | |
298 | cups_array_t **credentials) /* O - Array of credentials */ | |
299 | { | |
300 | unsigned count; /* Number of certificates */ | |
301 | const gnutls_datum_t *certs; /* Certificates */ | |
302 | ||
303 | ||
304 | DEBUG_printf(("httpCopyCredentials(http=%p, credentials=%p)", http, credentials)); | |
305 | ||
306 | if (credentials) | |
307 | *credentials = NULL; | |
308 | ||
309 | if (!http || !http->tls || !credentials) | |
310 | return (-1); | |
311 | ||
312 | *credentials = cupsArrayNew(NULL, NULL); | |
313 | certs = gnutls_certificate_get_peers(http->tls, &count); | |
314 | ||
315 | DEBUG_printf(("1httpCopyCredentials: certs=%p, count=%u", certs, count)); | |
316 | ||
317 | if (certs && count) | |
318 | { | |
319 | while (count > 0) | |
320 | { | |
321 | httpAddCredential(*credentials, certs->data, certs->size); | |
322 | certs ++; | |
323 | count --; | |
324 | } | |
325 | } | |
326 | ||
327 | return (0); | |
328 | } | |
329 | ||
330 | ||
331 | /* | |
332 | * '_httpCreateCredentials()' - Create credentials in the internal format. | |
333 | */ | |
334 | ||
335 | http_tls_credentials_t /* O - Internal credentials */ | |
336 | _httpCreateCredentials( | |
337 | cups_array_t *credentials) /* I - Array of credentials */ | |
338 | { | |
339 | (void)credentials; | |
340 | ||
341 | return (NULL); | |
342 | } | |
343 | ||
344 | ||
345 | /* | |
346 | * '_httpFreeCredentials()' - Free internal credentials. | |
347 | */ | |
348 | ||
349 | void | |
350 | _httpFreeCredentials( | |
351 | http_tls_credentials_t credentials) /* I - Internal credentials */ | |
352 | { | |
353 | (void)credentials; | |
354 | } | |
355 | ||
356 | ||
357 | /* | |
358 | * 'httpCredentialsAreValidForName()' - Return whether the credentials are valid for the given name. | |
359 | * | |
5d2cc5d3 | 360 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
361 | */ |
362 | ||
363 | int /* O - 1 if valid, 0 otherwise */ | |
364 | httpCredentialsAreValidForName( | |
365 | cups_array_t *credentials, /* I - Credentials */ | |
366 | const char *common_name) /* I - Name to check */ | |
367 | { | |
368 | gnutls_x509_crt_t cert; /* Certificate */ | |
369 | int result = 0; /* Result */ | |
370 | ||
371 | ||
372 | cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
373 | if (cert) | |
374 | { | |
375 | result = gnutls_x509_crt_check_hostname(cert, common_name) != 0; | |
376 | gnutls_x509_crt_deinit(cert); | |
377 | } | |
378 | ||
379 | return (result); | |
380 | } | |
381 | ||
382 | ||
383 | /* | |
384 | * 'httpCredentialsGetTrust()' - Return the trust of credentials. | |
385 | * | |
5d2cc5d3 | 386 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
387 | */ |
388 | ||
389 | http_trust_t /* O - Level of trust */ | |
390 | httpCredentialsGetTrust( | |
391 | cups_array_t *credentials, /* I - Credentials */ | |
392 | const char *common_name) /* I - Common name for trust lookup */ | |
393 | { | |
394 | http_trust_t trust = HTTP_TRUST_OK; | |
395 | /* Trusted? */ | |
396 | gnutls_x509_crt_t cert; /* Certificate */ | |
397 | cups_array_t *tcreds = NULL; /* Trusted credentials */ | |
398 | _cups_globals_t *cg = _cupsGlobals(); | |
399 | /* Per-thread globals */ | |
400 | ||
401 | ||
402 | if (!common_name) | |
403 | return (HTTP_TRUST_UNKNOWN); | |
404 | ||
405 | if ((cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials))) == NULL) | |
406 | return (HTTP_TRUST_UNKNOWN); | |
407 | ||
408 | /* | |
409 | * Look this common name up in the default keychains... | |
410 | */ | |
411 | ||
412 | httpLoadCredentials(NULL, &tcreds, common_name); | |
413 | ||
414 | if (tcreds) | |
415 | { | |
416 | char credentials_str[1024], /* String for incoming credentials */ | |
417 | tcreds_str[1024]; /* String for saved credentials */ | |
418 | ||
419 | httpCredentialsString(credentials, credentials_str, sizeof(credentials_str)); | |
420 | httpCredentialsString(tcreds, tcreds_str, sizeof(tcreds_str)); | |
421 | ||
422 | if (strcmp(credentials_str, tcreds_str)) | |
423 | { | |
424 | /* | |
425 | * Credentials don't match, let's look at the expiration date of the new | |
426 | * credentials and allow if the new ones have a later expiration... | |
427 | */ | |
428 | ||
429 | if (httpCredentialsGetExpiration(credentials) <= httpCredentialsGetExpiration(tcreds) || | |
430 | !httpCredentialsAreValidForName(credentials, common_name)) | |
431 | { | |
432 | /* | |
433 | * Either the new credentials are not newly issued, or the common name | |
434 | * does not match the issued certificate... | |
435 | */ | |
436 | ||
437 | trust = HTTP_TRUST_INVALID; | |
438 | } | |
439 | else if (httpCredentialsGetExpiration(tcreds) < time(NULL)) | |
440 | { | |
441 | /* | |
442 | * Save the renewed credentials... | |
443 | */ | |
444 | ||
445 | trust = HTTP_TRUST_RENEWED; | |
446 | ||
447 | httpSaveCredentials(NULL, credentials, common_name); | |
448 | } | |
449 | } | |
450 | ||
451 | httpFreeCredentials(tcreds); | |
452 | } | |
453 | else if (cg->validate_certs && !httpCredentialsAreValidForName(credentials, common_name)) | |
454 | trust = HTTP_TRUST_INVALID; | |
455 | ||
456 | if (trust == HTTP_TRUST_OK && !cg->expired_certs) | |
457 | { | |
458 | time_t curtime; /* Current date/time */ | |
459 | ||
460 | time(&curtime); | |
461 | if (curtime < gnutls_x509_crt_get_activation_time(cert) || | |
462 | curtime > gnutls_x509_crt_get_expiration_time(cert)) | |
463 | trust = HTTP_TRUST_EXPIRED; | |
464 | } | |
465 | ||
466 | if (trust == HTTP_TRUST_OK && !cg->any_root && cupsArrayCount(credentials) == 1) | |
467 | trust = HTTP_TRUST_INVALID; | |
468 | ||
469 | gnutls_x509_crt_deinit(cert); | |
470 | ||
471 | return (trust); | |
472 | } | |
473 | ||
474 | ||
475 | /* | |
476 | * 'httpCredentialsGetExpiration()' - Return the expiration date of the credentials. | |
477 | * | |
5d2cc5d3 | 478 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
479 | */ |
480 | ||
481 | time_t /* O - Expiration date of credentials */ | |
482 | httpCredentialsGetExpiration( | |
483 | cups_array_t *credentials) /* I - Credentials */ | |
484 | { | |
485 | gnutls_x509_crt_t cert; /* Certificate */ | |
486 | time_t result = 0; /* Result */ | |
487 | ||
488 | ||
489 | cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
490 | if (cert) | |
491 | { | |
492 | result = gnutls_x509_crt_get_expiration_time(cert); | |
493 | gnutls_x509_crt_deinit(cert); | |
494 | } | |
495 | ||
496 | return (result); | |
497 | } | |
498 | ||
499 | ||
500 | /* | |
501 | * 'httpCredentialsString()' - Return a string representing the credentials. | |
502 | * | |
5d2cc5d3 | 503 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
504 | */ |
505 | ||
506 | size_t /* O - Total size of credentials string */ | |
507 | httpCredentialsString( | |
508 | cups_array_t *credentials, /* I - Credentials */ | |
509 | char *buffer, /* I - Buffer or @code NULL@ */ | |
510 | size_t bufsize) /* I - Size of buffer */ | |
511 | { | |
512 | http_credential_t *first; /* First certificate */ | |
513 | gnutls_x509_crt_t cert; /* Certificate */ | |
514 | ||
515 | ||
516 | DEBUG_printf(("httpCredentialsString(credentials=%p, buffer=%p, bufsize=" CUPS_LLFMT ")", credentials, buffer, CUPS_LLCAST bufsize)); | |
517 | ||
518 | if (!buffer) | |
519 | return (0); | |
520 | ||
521 | if (buffer && bufsize > 0) | |
522 | *buffer = '\0'; | |
523 | ||
524 | if ((first = (http_credential_t *)cupsArrayFirst(credentials)) != NULL && | |
525 | (cert = http_gnutls_create_credential(first)) != NULL) | |
526 | { | |
527 | char name[256]; /* Common name associated with cert */ | |
528 | size_t namelen; /* Length of name */ | |
529 | time_t expiration; /* Expiration date of cert */ | |
530 | _cups_md5_state_t md5_state; /* MD5 state */ | |
531 | unsigned char md5_digest[16]; /* MD5 result */ | |
532 | ||
533 | namelen = sizeof(name) - 1; | |
534 | if (gnutls_x509_crt_get_dn_by_oid(cert, GNUTLS_OID_X520_COMMON_NAME, 0, 0, name, &namelen) >= 0) | |
535 | name[namelen] = '\0'; | |
536 | else | |
537 | strlcpy(name, "unknown", sizeof(name)); | |
538 | ||
539 | expiration = gnutls_x509_crt_get_expiration_time(cert); | |
540 | ||
541 | _cupsMD5Init(&md5_state); | |
542 | _cupsMD5Append(&md5_state, first->data, (int)first->datalen); | |
543 | _cupsMD5Finish(&md5_state, md5_digest); | |
544 | ||
545 | snprintf(buffer, bufsize, "%s / %s / %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X", name, httpGetDateString(expiration), md5_digest[0], md5_digest[1], md5_digest[2], md5_digest[3], md5_digest[4], md5_digest[5], md5_digest[6], md5_digest[7], md5_digest[8], md5_digest[9], md5_digest[10], md5_digest[11], md5_digest[12], md5_digest[13], md5_digest[14], md5_digest[15]); | |
546 | ||
547 | gnutls_x509_crt_deinit(cert); | |
548 | } | |
549 | ||
550 | DEBUG_printf(("1httpCredentialsString: Returning \"%s\".", buffer)); | |
551 | ||
552 | return (strlen(buffer)); | |
553 | } | |
554 | ||
555 | ||
556 | /* | |
557 | * 'httpLoadCredentials()' - Load X.509 credentials from a keychain file. | |
558 | * | |
5d2cc5d3 | 559 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
560 | */ |
561 | ||
562 | int /* O - 0 on success, -1 on error */ | |
563 | httpLoadCredentials( | |
564 | const char *path, /* I - Keychain/PKCS#12 path */ | |
565 | cups_array_t **credentials, /* IO - Credentials */ | |
566 | const char *common_name) /* I - Common name for credentials */ | |
567 | { | |
568 | cups_file_t *fp; /* Certificate file */ | |
569 | char filename[1024], /* filename.crt */ | |
570 | temp[1024], /* Temporary string */ | |
571 | line[256]; /* Base64-encoded line */ | |
572 | unsigned char *data = NULL; /* Buffer for cert data */ | |
573 | size_t alloc_data = 0, /* Bytes allocated */ | |
574 | num_data = 0; /* Bytes used */ | |
575 | int decoded; /* Bytes decoded */ | |
576 | ||
577 | ||
578 | if (!credentials || !common_name) | |
579 | return (-1); | |
580 | ||
581 | if (!path) | |
582 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
583 | if (!path) | |
584 | return (-1); | |
585 | ||
586 | http_gnutls_make_path(filename, sizeof(filename), path, common_name, "crt"); | |
587 | ||
588 | if ((fp = cupsFileOpen(filename, "r")) == NULL) | |
589 | return (-1); | |
590 | ||
591 | while (cupsFileGets(fp, line, sizeof(line))) | |
592 | { | |
593 | if (!strcmp(line, "-----BEGIN CERTIFICATE-----")) | |
594 | { | |
595 | if (num_data) | |
596 | { | |
597 | /* | |
598 | * Missing END CERTIFICATE... | |
599 | */ | |
600 | ||
601 | httpFreeCredentials(*credentials); | |
602 | *credentials = NULL; | |
603 | break; | |
604 | } | |
605 | } | |
606 | else if (!strcmp(line, "-----END CERTIFICATE-----")) | |
607 | { | |
608 | if (!num_data) | |
609 | { | |
610 | /* | |
611 | * Missing data... | |
612 | */ | |
613 | ||
614 | httpFreeCredentials(*credentials); | |
615 | *credentials = NULL; | |
616 | break; | |
617 | } | |
618 | ||
619 | if (!*credentials) | |
620 | *credentials = cupsArrayNew(NULL, NULL); | |
621 | ||
622 | if (httpAddCredential(*credentials, data, num_data)) | |
623 | { | |
624 | httpFreeCredentials(*credentials); | |
625 | *credentials = NULL; | |
626 | break; | |
627 | } | |
628 | ||
629 | num_data = 0; | |
630 | } | |
631 | else | |
632 | { | |
633 | if (alloc_data == 0) | |
634 | { | |
635 | data = malloc(2048); | |
636 | alloc_data = 2048; | |
637 | ||
638 | if (!data) | |
639 | break; | |
640 | } | |
641 | else if ((num_data + strlen(line)) >= alloc_data) | |
642 | { | |
643 | unsigned char *tdata = realloc(data, alloc_data + 1024); | |
644 | /* Expanded buffer */ | |
645 | ||
646 | if (!tdata) | |
647 | { | |
648 | httpFreeCredentials(*credentials); | |
649 | *credentials = NULL; | |
650 | break; | |
651 | } | |
652 | ||
653 | data = tdata; | |
654 | alloc_data += 1024; | |
655 | } | |
656 | ||
657 | decoded = alloc_data - num_data; | |
658 | httpDecode64_2((char *)data + num_data, &decoded, line); | |
659 | num_data += (size_t)decoded; | |
660 | } | |
661 | } | |
662 | ||
663 | cupsFileClose(fp); | |
664 | ||
665 | if (num_data) | |
666 | { | |
667 | /* | |
668 | * Missing END CERTIFICATE... | |
669 | */ | |
670 | ||
671 | httpFreeCredentials(*credentials); | |
672 | *credentials = NULL; | |
673 | } | |
674 | ||
675 | if (data) | |
676 | free(data); | |
677 | ||
678 | return (*credentials ? 0 : -1); | |
679 | } | |
680 | ||
681 | ||
682 | /* | |
683 | * 'httpSaveCredentials()' - Save X.509 credentials to a keychain file. | |
684 | * | |
5d2cc5d3 | 685 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
686 | */ |
687 | ||
688 | int /* O - -1 on error, 0 on success */ | |
689 | httpSaveCredentials( | |
690 | const char *path, /* I - Keychain/PKCS#12 path */ | |
691 | cups_array_t *credentials, /* I - Credentials */ | |
692 | const char *common_name) /* I - Common name for credentials */ | |
693 | { | |
694 | cups_file_t *fp; /* Certificate file */ | |
695 | char filename[1024], /* filename.crt */ | |
696 | nfilename[1024],/* filename.crt.N */ | |
697 | temp[1024], /* Temporary string */ | |
698 | line[256]; /* Base64-encoded line */ | |
699 | const unsigned char *ptr; /* Pointer into certificate */ | |
700 | ssize_t remaining; /* Bytes left */ | |
701 | http_credential_t *cred; /* Current credential */ | |
702 | ||
703 | ||
704 | if (!credentials || !common_name) | |
705 | return (-1); | |
706 | ||
707 | if (!path) | |
708 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
709 | if (!path) | |
710 | return (-1); | |
711 | ||
712 | http_gnutls_make_path(filename, sizeof(filename), path, common_name, "crt"); | |
713 | snprintf(nfilename, sizeof(nfilename), "%s.N", filename); | |
714 | ||
715 | if ((fp = cupsFileOpen(nfilename, "w")) == NULL) | |
716 | return (-1); | |
717 | ||
718 | fchmod(cupsFileNumber(fp), 0600); | |
719 | ||
720 | for (cred = (http_credential_t *)cupsArrayFirst(credentials); | |
721 | cred; | |
722 | cred = (http_credential_t *)cupsArrayNext(credentials)) | |
723 | { | |
724 | cupsFilePuts(fp, "-----BEGIN CERTIFICATE-----\n"); | |
725 | for (ptr = cred->data, remaining = (ssize_t)cred->datalen; remaining > 0; remaining -= 45, ptr += 45) | |
726 | { | |
727 | httpEncode64_2(line, sizeof(line), (char *)ptr, remaining > 45 ? 45 : remaining); | |
728 | cupsFilePrintf(fp, "%s\n", line); | |
729 | } | |
730 | cupsFilePuts(fp, "-----END CERTIFICATE-----\n"); | |
731 | } | |
732 | ||
733 | cupsFileClose(fp); | |
734 | ||
735 | return (rename(nfilename, filename)); | |
736 | } | |
737 | ||
738 | ||
739 | /* | |
740 | * 'http_gnutls_create_credential()' - Create a single credential in the internal format. | |
741 | */ | |
742 | ||
743 | static gnutls_x509_crt_t /* O - Certificate */ | |
744 | http_gnutls_create_credential( | |
745 | http_credential_t *credential) /* I - Credential */ | |
746 | { | |
747 | int result; /* Result from GNU TLS */ | |
748 | gnutls_x509_crt_t cert; /* Certificate */ | |
749 | gnutls_datum_t datum; /* Data record */ | |
750 | ||
751 | ||
752 | DEBUG_printf(("3http_gnutls_create_credential(credential=%p)", credential)); | |
753 | ||
754 | if (!credential) | |
755 | return (NULL); | |
756 | ||
757 | if ((result = gnutls_x509_crt_init(&cert)) < 0) | |
758 | { | |
759 | DEBUG_printf(("4http_gnutls_create_credential: init error: %s", gnutls_strerror(result))); | |
760 | return (NULL); | |
761 | } | |
762 | ||
763 | datum.data = credential->data; | |
764 | datum.size = credential->datalen; | |
765 | ||
766 | if ((result = gnutls_x509_crt_import(cert, &datum, GNUTLS_X509_FMT_DER)) < 0) | |
767 | { | |
768 | DEBUG_printf(("4http_gnutls_create_credential: import error: %s", gnutls_strerror(result))); | |
769 | ||
770 | gnutls_x509_crt_deinit(cert); | |
771 | return (NULL); | |
772 | } | |
773 | ||
774 | return (cert); | |
775 | } | |
776 | ||
777 | ||
778 | /* | |
779 | * 'http_gnutls_default_path()' - Get the default credential store path. | |
780 | */ | |
781 | ||
782 | static const char * /* O - Path or NULL on error */ | |
783 | http_gnutls_default_path(char *buffer,/* I - Path buffer */ | |
784 | size_t bufsize)/* I - Size of path buffer */ | |
785 | { | |
786 | const char *home = getenv("HOME"); /* HOME environment variable */ | |
787 | ||
788 | ||
789 | if (getuid() && home) | |
790 | { | |
791 | snprintf(buffer, bufsize, "%s/.cups", home); | |
792 | if (access(buffer, 0)) | |
793 | { | |
794 | DEBUG_printf(("1http_gnutls_default_path: Making directory \"%s\".", buffer)); | |
795 | if (mkdir(buffer, 0700)) | |
796 | { | |
797 | DEBUG_printf(("1http_gnutls_default_path: Failed to make directory: %s", strerror(errno))); | |
798 | return (NULL); | |
799 | } | |
800 | } | |
801 | ||
802 | snprintf(buffer, bufsize, "%s/.cups/ssl", home); | |
803 | if (access(buffer, 0)) | |
804 | { | |
805 | DEBUG_printf(("1http_gnutls_default_path: Making directory \"%s\".", buffer)); | |
806 | if (mkdir(buffer, 0700)) | |
807 | { | |
808 | DEBUG_printf(("1http_gnutls_default_path: Failed to make directory: %s", strerror(errno))); | |
809 | return (NULL); | |
810 | } | |
811 | } | |
812 | } | |
813 | else | |
814 | strlcpy(buffer, CUPS_SERVERROOT "/ssl", bufsize); | |
815 | ||
816 | DEBUG_printf(("1http_gnutls_default_path: Using default path \"%s\".", buffer)); | |
817 | ||
818 | return (buffer); | |
819 | } | |
820 | ||
821 | ||
822 | /* | |
823 | * 'http_gnutls_make_path()' - Format a filename for a certificate or key file. | |
824 | */ | |
825 | ||
826 | static const char * /* O - Filename */ | |
827 | http_gnutls_make_path( | |
828 | char *buffer, /* I - Filename buffer */ | |
829 | size_t bufsize, /* I - Size of buffer */ | |
830 | const char *dirname, /* I - Directory */ | |
831 | const char *filename, /* I - Filename (usually hostname) */ | |
832 | const char *ext) /* I - Extension */ | |
833 | { | |
834 | char *bufptr, /* Pointer into buffer */ | |
835 | *bufend = buffer + bufsize - 1; /* End of buffer */ | |
836 | ||
837 | ||
838 | snprintf(buffer, bufsize, "%s/", dirname); | |
839 | bufptr = buffer + strlen(buffer); | |
840 | ||
841 | while (*filename && bufptr < bufend) | |
842 | { | |
843 | if (_cups_isalnum(*filename) || *filename == '-' || *filename == '.') | |
844 | *bufptr++ = *filename; | |
845 | else | |
846 | *bufptr++ = '_'; | |
847 | ||
848 | filename ++; | |
849 | } | |
850 | ||
851 | if (bufptr < bufend) | |
852 | *bufptr++ = '.'; | |
853 | ||
854 | strlcpy(bufptr, ext, (size_t)(bufend - bufptr + 1)); | |
855 | ||
856 | return (buffer); | |
857 | } | |
858 | ||
859 | ||
860 | /* | |
861 | * 'http_gnutls_read()' - Read function for the GNU TLS library. | |
862 | */ | |
863 | ||
864 | static ssize_t /* O - Number of bytes read or -1 on error */ | |
865 | http_gnutls_read( | |
866 | gnutls_transport_ptr_t ptr, /* I - Connection to server */ | |
867 | void *data, /* I - Buffer */ | |
868 | size_t length) /* I - Number of bytes to read */ | |
869 | { | |
870 | http_t *http; /* HTTP connection */ | |
871 | ssize_t bytes; /* Bytes read */ | |
872 | ||
873 | ||
874 | DEBUG_printf(("6http_gnutls_read(ptr=%p, data=%p, length=%d)", ptr, data, (int)length)); | |
875 | ||
876 | http = (http_t *)ptr; | |
877 | ||
878 | if (!http->blocking) | |
879 | { | |
880 | /* | |
881 | * Make sure we have data before we read... | |
882 | */ | |
883 | ||
884 | while (!_httpWait(http, http->wait_value, 0)) | |
885 | { | |
886 | if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) | |
887 | continue; | |
888 | ||
889 | http->error = ETIMEDOUT; | |
890 | return (-1); | |
891 | } | |
892 | } | |
893 | ||
894 | bytes = recv(http->fd, data, length, 0); | |
895 | DEBUG_printf(("6http_gnutls_read: bytes=%d", (int)bytes)); | |
896 | return (bytes); | |
897 | } | |
898 | ||
899 | ||
900 | /* | |
901 | * 'http_gnutls_write()' - Write function for the GNU TLS library. | |
902 | */ | |
903 | ||
904 | static ssize_t /* O - Number of bytes written or -1 on error */ | |
905 | http_gnutls_write( | |
906 | gnutls_transport_ptr_t ptr, /* I - Connection to server */ | |
907 | const void *data, /* I - Data buffer */ | |
908 | size_t length) /* I - Number of bytes to write */ | |
909 | { | |
910 | ssize_t bytes; /* Bytes written */ | |
911 | ||
912 | ||
913 | DEBUG_printf(("6http_gnutls_write(ptr=%p, data=%p, length=%d)", ptr, data, | |
914 | (int)length)); | |
915 | bytes = send(((http_t *)ptr)->fd, data, length, 0); | |
916 | DEBUG_printf(("http_gnutls_write: bytes=%d", (int)bytes)); | |
917 | ||
918 | return (bytes); | |
919 | } | |
920 | ||
921 | ||
922 | /* | |
923 | * '_httpTLSInitialize()' - Initialize the TLS stack. | |
924 | */ | |
925 | ||
926 | void | |
927 | _httpTLSInitialize(void) | |
928 | { | |
929 | /* | |
930 | * Initialize GNU TLS... | |
931 | */ | |
932 | ||
933 | gnutls_global_init(); | |
934 | } | |
935 | ||
936 | ||
937 | /* | |
938 | * '_httpTLSPending()' - Return the number of pending TLS-encrypted bytes. | |
939 | */ | |
940 | ||
941 | size_t /* O - Bytes available */ | |
942 | _httpTLSPending(http_t *http) /* I - HTTP connection */ | |
943 | { | |
944 | return (gnutls_record_check_pending(http->tls)); | |
945 | } | |
946 | ||
947 | ||
948 | /* | |
949 | * '_httpTLSRead()' - Read from a SSL/TLS connection. | |
950 | */ | |
951 | ||
952 | int /* O - Bytes read */ | |
953 | _httpTLSRead(http_t *http, /* I - Connection to server */ | |
954 | char *buf, /* I - Buffer to store data */ | |
955 | int len) /* I - Length of buffer */ | |
956 | { | |
957 | ssize_t result; /* Return value */ | |
958 | ||
959 | ||
960 | result = gnutls_record_recv(http->tls, buf, (size_t)len); | |
961 | ||
962 | if (result < 0 && !errno) | |
963 | { | |
964 | /* | |
965 | * Convert GNU TLS error to errno value... | |
966 | */ | |
967 | ||
968 | switch (result) | |
969 | { | |
970 | case GNUTLS_E_INTERRUPTED : | |
971 | errno = EINTR; | |
972 | break; | |
973 | ||
974 | case GNUTLS_E_AGAIN : | |
975 | errno = EAGAIN; | |
976 | break; | |
977 | ||
978 | default : | |
979 | errno = EPIPE; | |
980 | break; | |
981 | } | |
982 | ||
983 | result = -1; | |
984 | } | |
985 | ||
986 | return ((int)result); | |
987 | } | |
988 | ||
989 | ||
990 | /* | |
991 | * '_httpTLSSetCredentials()' - Set the TLS credentials. | |
992 | */ | |
993 | ||
994 | int /* O - Status of connection */ | |
995 | _httpTLSSetCredentials(http_t *http) /* I - Connection to server */ | |
996 | { | |
997 | (void)http; | |
998 | ||
999 | return (0); | |
1000 | } | |
1001 | ||
1002 | ||
1003 | /* | |
1004 | * '_httpTLSStart()' - Set up SSL/TLS support on a connection. | |
1005 | */ | |
1006 | ||
1007 | int /* O - 0 on success, -1 on failure */ | |
1008 | _httpTLSStart(http_t *http) /* I - Connection to server */ | |
1009 | { | |
1010 | char hostname[256], /* Hostname */ | |
1011 | *hostptr; /* Pointer into hostname */ | |
1012 | int status; /* Status of handshake */ | |
1013 | gnutls_certificate_credentials_t *credentials; | |
1014 | /* TLS credentials */ | |
1015 | ||
1016 | ||
1017 | DEBUG_printf(("7_httpTLSStart(http=%p)", http)); | |
1018 | ||
1019 | if (http->mode == _HTTP_MODE_SERVER && !tls_keypath) | |
1020 | { | |
1021 | DEBUG_puts("4_httpTLSStart: cupsSetServerCredentials not called."); | |
1022 | http->error = errno = EINVAL; | |
1023 | http->status = HTTP_STATUS_ERROR; | |
1024 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Server credentials not set."), 1); | |
1025 | ||
1026 | return (-1); | |
1027 | } | |
1028 | ||
1029 | credentials = (gnutls_certificate_credentials_t *) | |
1030 | malloc(sizeof(gnutls_certificate_credentials_t)); | |
1031 | if (credentials == NULL) | |
1032 | { | |
1033 | DEBUG_printf(("8_httpStartTLS: Unable to allocate credentials: %s", | |
1034 | strerror(errno))); | |
1035 | http->error = errno; | |
1036 | http->status = HTTP_STATUS_ERROR; | |
1037 | _cupsSetHTTPError(HTTP_STATUS_ERROR); | |
1038 | ||
1039 | return (-1); | |
1040 | } | |
1041 | ||
1042 | gnutls_certificate_allocate_credentials(credentials); | |
1043 | status = gnutls_init(&http->tls, http->mode == _HTTP_MODE_CLIENT ? GNUTLS_CLIENT : GNUTLS_SERVER); | |
1044 | if (!status) | |
1045 | status = gnutls_set_default_priority(http->tls); | |
1046 | ||
1047 | if (status) | |
1048 | { | |
1049 | http->error = EIO; | |
1050 | http->status = HTTP_STATUS_ERROR; | |
1051 | ||
1052 | DEBUG_printf(("4_httpTLSStart: Unable to initialize common TLS parameters: %s", gnutls_strerror(status))); | |
1053 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1054 | ||
1055 | gnutls_deinit(http->tls); | |
1056 | gnutls_certificate_free_credentials(*credentials); | |
1057 | free(credentials); | |
1058 | http->tls = NULL; | |
1059 | ||
1060 | return (-1); | |
1061 | } | |
1062 | ||
1063 | if (http->mode == _HTTP_MODE_CLIENT) | |
1064 | { | |
1065 | /* | |
1066 | * Client: get the hostname to use for TLS... | |
1067 | */ | |
1068 | ||
1069 | if (httpAddrLocalhost(http->hostaddr)) | |
1070 | { | |
1071 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
1072 | } | |
1073 | else | |
1074 | { | |
1075 | /* | |
1076 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
1077 | */ | |
1078 | ||
1079 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
1080 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
1081 | *hostptr == '.') | |
1082 | *hostptr = '\0'; | |
1083 | } | |
1084 | ||
1085 | status = gnutls_server_name_set(http->tls, GNUTLS_NAME_DNS, hostname, strlen(hostname)); | |
1086 | } | |
1087 | else | |
1088 | { | |
1089 | /* | |
1090 | * Server: get certificate and private key... | |
1091 | */ | |
1092 | ||
1093 | char crtfile[1024], /* Certificate file */ | |
1094 | keyfile[1024]; /* Private key file */ | |
1095 | int have_creds = 0; /* Have credentials? */ | |
1096 | ||
1097 | ||
1098 | if (http->fields[HTTP_FIELD_HOST][0]) | |
1099 | { | |
1100 | /* | |
1101 | * Use hostname for TLS upgrade... | |
1102 | */ | |
1103 | ||
1104 | strlcpy(hostname, http->fields[HTTP_FIELD_HOST], sizeof(hostname)); | |
1105 | } | |
1106 | else | |
1107 | { | |
1108 | /* | |
1109 | * Resolve hostname from connection address... | |
1110 | */ | |
1111 | ||
1112 | http_addr_t addr; /* Connection address */ | |
1113 | socklen_t addrlen; /* Length of address */ | |
1114 | ||
1115 | addrlen = sizeof(addr); | |
1116 | if (getsockname(http->fd, (struct sockaddr *)&addr, &addrlen)) | |
1117 | { | |
1118 | DEBUG_printf(("4_httpTLSStart: Unable to get socket address: %s", strerror(errno))); | |
1119 | hostname[0] = '\0'; | |
1120 | } | |
1121 | else if (httpAddrLocalhost(&addr)) | |
1122 | hostname[0] = '\0'; | |
1123 | else | |
1124 | { | |
1125 | httpAddrLookup(&addr, hostname, sizeof(hostname)); | |
1126 | DEBUG_printf(("4_httpTLSStart: Resolved socket address to \"%s\".", hostname)); | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | if (isdigit(hostname[0] & 255) || hostname[0] == '[') | |
1131 | hostname[0] = '\0'; /* Don't allow numeric addresses */ | |
1132 | ||
1133 | if (hostname[0]) | |
1134 | { | |
1135 | http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, hostname, "crt"); | |
1136 | http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, hostname, "key"); | |
1137 | ||
1138 | have_creds = !access(crtfile, 0) && !access(keyfile, 0); | |
1139 | } | |
1140 | else if (tls_common_name) | |
1141 | { | |
1142 | http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, tls_common_name, "crt"); | |
1143 | http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, tls_common_name, "key"); | |
1144 | ||
1145 | have_creds = !access(crtfile, 0) && !access(keyfile, 0); | |
1146 | } | |
1147 | ||
1148 | if (!have_creds && tls_auto_create && (hostname[0] || tls_common_name)) | |
1149 | { | |
1150 | DEBUG_printf(("4_httpTLSStart: Auto-create credentials for \"%s\".", hostname[0] ? hostname : tls_common_name)); | |
1151 | ||
1152 | if (!cupsMakeServerCredentials(tls_keypath, hostname[0] ? hostname : tls_common_name, 0, NULL, time(NULL) + 365 * 86400)) | |
1153 | { | |
1154 | DEBUG_puts("4_httpTLSStart: cupsMakeServerCredentials failed."); | |
1155 | http->error = errno = EINVAL; | |
1156 | http->status = HTTP_STATUS_ERROR; | |
1157 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unable to create server credentials."), 1); | |
1158 | ||
1159 | return (-1); | |
1160 | } | |
1161 | } | |
1162 | ||
1163 | DEBUG_printf(("4_httpTLSStart: Using certificate \"%s\" and private key \"%s\".", crtfile, keyfile)); | |
1164 | ||
1165 | status = gnutls_certificate_set_x509_key_file(*credentials, crtfile, keyfile, GNUTLS_X509_FMT_PEM); | |
1166 | } | |
1167 | ||
1168 | if (!status) | |
1169 | status = gnutls_credentials_set(http->tls, GNUTLS_CRD_CERTIFICATE, *credentials); | |
1170 | ||
1171 | if (status) | |
1172 | { | |
1173 | http->error = EIO; | |
1174 | http->status = HTTP_STATUS_ERROR; | |
1175 | ||
1176 | DEBUG_printf(("4_httpTLSStart: Unable to complete client/server setup: %s", gnutls_strerror(status))); | |
1177 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1178 | ||
1179 | gnutls_deinit(http->tls); | |
1180 | gnutls_certificate_free_credentials(*credentials); | |
1181 | free(credentials); | |
1182 | http->tls = NULL; | |
1183 | ||
1184 | return (-1); | |
1185 | } | |
1186 | ||
1187 | gnutls_transport_set_ptr(http->tls, (gnutls_transport_ptr_t)http); | |
1188 | gnutls_transport_set_pull_function(http->tls, http_gnutls_read); | |
5d2cc5d3 | 1189 | #ifdef HAVE_GNUTLS_TRANSPORT_SET_PULL_TIMEOUT_FUNCTION |
1a18c85c | 1190 | gnutls_transport_set_pull_timeout_function(http->tls, (gnutls_pull_timeout_func)httpWait); |
5d2cc5d3 | 1191 | #endif /* HAVE_GNUTLS_TRANSPORT_SET_PULL_TIMEOUT_FUNCTION */ |
1a18c85c MS |
1192 | gnutls_transport_set_push_function(http->tls, http_gnutls_write); |
1193 | ||
1194 | while ((status = gnutls_handshake(http->tls)) != GNUTLS_E_SUCCESS) | |
1195 | { | |
1196 | DEBUG_printf(("5_httpStartTLS: gnutls_handshake returned %d (%s)", | |
1197 | status, gnutls_strerror(status))); | |
1198 | ||
1199 | if (gnutls_error_is_fatal(status)) | |
1200 | { | |
1201 | http->error = EIO; | |
1202 | http->status = HTTP_STATUS_ERROR; | |
1203 | ||
1204 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1205 | ||
1206 | gnutls_deinit(http->tls); | |
1207 | gnutls_certificate_free_credentials(*credentials); | |
1208 | free(credentials); | |
1209 | http->tls = NULL; | |
1210 | ||
1211 | return (-1); | |
1212 | } | |
1213 | } | |
1214 | ||
1215 | http->tls_credentials = credentials; | |
1216 | ||
1217 | return (0); | |
1218 | } | |
1219 | ||
1220 | ||
1221 | /* | |
1222 | * '_httpTLSStop()' - Shut down SSL/TLS on a connection. | |
1223 | */ | |
1224 | ||
1225 | void | |
1226 | _httpTLSStop(http_t *http) /* I - Connection to server */ | |
1227 | { | |
1228 | int error; /* Error code */ | |
1229 | ||
1230 | ||
1231 | error = gnutls_bye(http->tls, http->mode == _HTTP_MODE_CLIENT ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR); | |
1232 | if (error != GNUTLS_E_SUCCESS) | |
1233 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(errno), 0); | |
1234 | ||
1235 | gnutls_deinit(http->tls); | |
1236 | http->tls = NULL; | |
1237 | ||
1238 | if (http->tls_credentials) | |
1239 | { | |
1240 | gnutls_certificate_free_credentials(*(http->tls_credentials)); | |
1241 | free(http->tls_credentials); | |
1242 | http->tls_credentials = NULL; | |
1243 | } | |
1244 | } | |
1245 | ||
1246 | ||
1247 | /* | |
1248 | * '_httpTLSWrite()' - Write to a SSL/TLS connection. | |
1249 | */ | |
1250 | ||
1251 | int /* O - Bytes written */ | |
1252 | _httpTLSWrite(http_t *http, /* I - Connection to server */ | |
1253 | const char *buf, /* I - Buffer holding data */ | |
1254 | int len) /* I - Length of buffer */ | |
1255 | { | |
1256 | ssize_t result; /* Return value */ | |
1257 | ||
1258 | ||
1259 | DEBUG_printf(("2http_write_ssl(http=%p, buf=%p, len=%d)", http, buf, len)); | |
1260 | ||
1261 | result = gnutls_record_send(http->tls, buf, (size_t)len); | |
1262 | ||
1263 | if (result < 0 && !errno) | |
1264 | { | |
1265 | /* | |
1266 | * Convert GNU TLS error to errno value... | |
1267 | */ | |
1268 | ||
1269 | switch (result) | |
1270 | { | |
1271 | case GNUTLS_E_INTERRUPTED : | |
1272 | errno = EINTR; | |
1273 | break; | |
1274 | ||
1275 | case GNUTLS_E_AGAIN : | |
1276 | errno = EAGAIN; | |
1277 | break; | |
1278 | ||
1279 | default : | |
1280 | errno = EPIPE; | |
1281 | break; | |
1282 | } | |
1283 | ||
1284 | result = -1; | |
1285 | } | |
1286 | ||
1287 | DEBUG_printf(("3http_write_ssl: Returning %d.", (int)result)); | |
1288 | ||
1289 | return ((int)result); | |
1290 | } | |
1291 | ||
1292 | ||
1293 | /* | |
5d2cc5d3 | 1294 | * End of "$Id: tls-gnutls.c 12125 2014-08-28 15:49:29Z msweet $". |
1a18c85c | 1295 | */ |