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1a18c85c | 1 | /* |
b9367124 | 2 | * "$Id: tls-gnutls.c 12159 2014-09-23 14:56:14Z 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 | ||
b9367124 | 18 | /**** This file is included from tls.c ****/ |
1a18c85c MS |
19 | |
20 | /* | |
21 | * Include necessary headers... | |
22 | */ | |
23 | ||
24 | #include <sys/stat.h> | |
25 | ||
26 | ||
27 | /* | |
28 | * Local globals... | |
29 | */ | |
30 | ||
31 | static int tls_auto_create = 0; | |
32 | /* Auto-create self-signed certs? */ | |
33 | static char *tls_common_name = NULL; | |
34 | /* Default common name */ | |
35 | static char *tls_keypath = NULL; | |
36 | /* Server cert keychain path */ | |
37 | static _cups_mutex_t tls_mutex = _CUPS_MUTEX_INITIALIZER; | |
38 | /* Mutex for keychain/certs */ | |
39 | ||
40 | ||
41 | /* | |
42 | * Local functions... | |
43 | */ | |
44 | ||
45 | static gnutls_x509_crt_t http_gnutls_create_credential(http_credential_t *credential); | |
46 | static const char *http_gnutls_default_path(char *buffer, size_t bufsize); | |
47 | static const char *http_gnutls_make_path(char *buffer, size_t bufsize, const char *dirname, const char *filename, const char *ext); | |
48 | static ssize_t http_gnutls_read(gnutls_transport_ptr_t ptr, void *data, size_t length); | |
49 | static ssize_t http_gnutls_write(gnutls_transport_ptr_t ptr, const void *data, size_t length); | |
50 | ||
51 | ||
52 | /* | |
53 | * 'cupsMakeServerCredentials()' - Make a self-signed certificate and private key pair. | |
54 | * | |
5d2cc5d3 | 55 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
56 | */ |
57 | ||
58 | int /* O - 1 on success, 0 on failure */ | |
59 | cupsMakeServerCredentials( | |
60 | const char *path, /* I - Path to keychain/directory */ | |
61 | const char *common_name, /* I - Common name */ | |
62 | int num_alt_names, /* I - Number of subject alternate names */ | |
63 | const char **alt_names, /* I - Subject Alternate Names */ | |
64 | time_t expiration_date) /* I - Expiration date */ | |
65 | { | |
66 | gnutls_x509_crt_t crt; /* Self-signed certificate */ | |
67 | gnutls_x509_privkey_t key; /* Encryption private key */ | |
68 | char temp[1024], /* Temporary directory name */ | |
69 | crtfile[1024], /* Certificate filename */ | |
70 | keyfile[1024]; /* Private key filename */ | |
71 | cups_lang_t *language; /* Default language info */ | |
72 | cups_file_t *fp; /* Key/cert file */ | |
73 | unsigned char buffer[8192]; /* Buffer for x509 data */ | |
74 | size_t bytes; /* Number of bytes of data */ | |
75 | unsigned char serial[4]; /* Serial number buffer */ | |
76 | time_t curtime; /* Current time */ | |
77 | int result; /* Result of GNU TLS calls */ | |
78 | ||
79 | ||
80 | 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)); | |
81 | ||
82 | /* | |
83 | * Filenames... | |
84 | */ | |
85 | ||
86 | if (!path) | |
87 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
88 | ||
89 | if (!path || !common_name) | |
90 | { | |
91 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0); | |
92 | return (0); | |
93 | } | |
94 | ||
95 | http_gnutls_make_path(crtfile, sizeof(crtfile), path, common_name, "crt"); | |
96 | http_gnutls_make_path(keyfile, sizeof(keyfile), path, common_name, "key"); | |
97 | ||
98 | /* | |
99 | * Create the encryption key... | |
100 | */ | |
101 | ||
102 | DEBUG_puts("1cupsMakeServerCredentials: Creating key pair."); | |
103 | ||
104 | gnutls_x509_privkey_init(&key); | |
105 | gnutls_x509_privkey_generate(key, GNUTLS_PK_RSA, 2048, 0); | |
106 | ||
107 | DEBUG_puts("1cupsMakeServerCredentials: Key pair created."); | |
108 | ||
109 | /* | |
110 | * Save it... | |
111 | */ | |
112 | ||
113 | bytes = sizeof(buffer); | |
114 | ||
115 | if ((result = gnutls_x509_privkey_export(key, GNUTLS_X509_FMT_PEM, buffer, &bytes)) < 0) | |
116 | { | |
117 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to export private key: %s", gnutls_strerror(result))); | |
118 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(result), 0); | |
119 | gnutls_x509_privkey_deinit(key); | |
120 | return (0); | |
121 | } | |
122 | else if ((fp = cupsFileOpen(keyfile, "w")) != NULL) | |
123 | { | |
124 | DEBUG_printf(("1cupsMakeServerCredentials: Writing private key to \"%s\".", keyfile)); | |
125 | cupsFileWrite(fp, (char *)buffer, bytes); | |
126 | cupsFileClose(fp); | |
127 | } | |
128 | else | |
129 | { | |
130 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to create private key file \"%s\": %s", keyfile, strerror(errno))); | |
131 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); | |
132 | gnutls_x509_privkey_deinit(key); | |
133 | return (0); | |
134 | } | |
135 | ||
136 | /* | |
137 | * Create the self-signed certificate... | |
138 | */ | |
139 | ||
140 | DEBUG_puts("1cupsMakeServerCredentials: Generating self-signed X.509 certificate."); | |
141 | ||
142 | language = cupsLangDefault(); | |
143 | curtime = time(NULL); | |
144 | serial[0] = curtime >> 24; | |
145 | serial[1] = curtime >> 16; | |
146 | serial[2] = curtime >> 8; | |
147 | serial[3] = curtime; | |
148 | ||
149 | gnutls_x509_crt_init(&crt); | |
150 | if (strlen(language->language) == 5) | |
151 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0, | |
152 | language->language + 3, 2); | |
153 | else | |
154 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0, | |
155 | "US", 2); | |
156 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0, | |
157 | common_name, strlen(common_name)); | |
158 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATION_NAME, 0, | |
159 | common_name, strlen(common_name)); | |
160 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATIONAL_UNIT_NAME, | |
161 | 0, "Unknown", 7); | |
162 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_STATE_OR_PROVINCE_NAME, 0, | |
163 | "Unknown", 7); | |
164 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_LOCALITY_NAME, 0, | |
165 | "Unknown", 7); | |
166 | /* gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_PKCS9_EMAIL, 0, | |
167 | ServerAdmin, strlen(ServerAdmin));*/ | |
168 | gnutls_x509_crt_set_key(crt, key); | |
169 | gnutls_x509_crt_set_serial(crt, serial, sizeof(serial)); | |
170 | gnutls_x509_crt_set_activation_time(crt, curtime); | |
171 | gnutls_x509_crt_set_expiration_time(crt, curtime + 10 * 365 * 86400); | |
172 | gnutls_x509_crt_set_ca_status(crt, 0); | |
173 | if (num_alt_names > 0) | |
174 | gnutls_x509_crt_set_subject_alternative_name(crt, GNUTLS_SAN_DNSNAME, alt_names[0]); | |
175 | gnutls_x509_crt_set_key_purpose_oid(crt, GNUTLS_KP_TLS_WWW_SERVER, 0); | |
176 | gnutls_x509_crt_set_key_usage(crt, GNUTLS_KEY_KEY_ENCIPHERMENT); | |
177 | gnutls_x509_crt_set_version(crt, 3); | |
178 | ||
179 | bytes = sizeof(buffer); | |
180 | if (gnutls_x509_crt_get_key_id(crt, 0, buffer, &bytes) >= 0) | |
181 | gnutls_x509_crt_set_subject_key_id(crt, buffer, bytes); | |
182 | ||
183 | gnutls_x509_crt_sign(crt, crt, key); | |
184 | ||
185 | /* | |
186 | * Save it... | |
187 | */ | |
188 | ||
189 | bytes = sizeof(buffer); | |
190 | if ((result = gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, buffer, &bytes)) < 0) | |
191 | { | |
192 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to export public key and X.509 certificate: %s", gnutls_strerror(result))); | |
193 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(result), 0); | |
194 | gnutls_x509_crt_deinit(crt); | |
195 | gnutls_x509_privkey_deinit(key); | |
196 | return (0); | |
197 | } | |
198 | else if ((fp = cupsFileOpen(crtfile, "w")) != NULL) | |
199 | { | |
200 | DEBUG_printf(("1cupsMakeServerCredentials: Writing public key and X.509 certificate to \"%s\".", crtfile)); | |
201 | cupsFileWrite(fp, (char *)buffer, bytes); | |
202 | cupsFileClose(fp); | |
203 | } | |
204 | else | |
205 | { | |
206 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to create public key and X.509 certificate file \"%s\": %s", crtfile, strerror(errno))); | |
207 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); | |
208 | gnutls_x509_crt_deinit(crt); | |
209 | gnutls_x509_privkey_deinit(key); | |
210 | return (0); | |
211 | } | |
212 | ||
213 | /* | |
214 | * Cleanup... | |
215 | */ | |
216 | ||
217 | gnutls_x509_crt_deinit(crt); | |
218 | gnutls_x509_privkey_deinit(key); | |
219 | ||
220 | DEBUG_puts("1cupsMakeServerCredentials: Successfully created credentials."); | |
221 | ||
222 | return (1); | |
223 | } | |
224 | ||
225 | ||
226 | /* | |
227 | * 'cupsSetServerCredentials()' - Set the default server credentials. | |
228 | * | |
229 | * Note: The server credentials are used by all threads in the running process. | |
230 | * This function is threadsafe. | |
231 | * | |
5d2cc5d3 | 232 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
233 | */ |
234 | ||
235 | int /* O - 1 on success, 0 on failure */ | |
236 | cupsSetServerCredentials( | |
237 | const char *path, /* I - Path to keychain/directory */ | |
238 | const char *common_name, /* I - Default common name for server */ | |
239 | int auto_create) /* I - 1 = automatically create self-signed certificates */ | |
240 | { | |
241 | char temp[1024]; /* Default path buffer */ | |
242 | ||
243 | ||
244 | DEBUG_printf(("cupsSetServerCredentials(path=\"%s\", common_name=\"%s\", auto_create=%d)", path, common_name, auto_create)); | |
245 | ||
246 | /* | |
247 | * Use defaults as needed... | |
248 | */ | |
249 | ||
250 | if (!path) | |
251 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
252 | ||
253 | /* | |
254 | * Range check input... | |
255 | */ | |
256 | ||
257 | if (!path || !common_name) | |
258 | { | |
259 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0); | |
260 | return (0); | |
261 | } | |
262 | ||
263 | _cupsMutexLock(&tls_mutex); | |
264 | ||
265 | /* | |
266 | * Free old values... | |
267 | */ | |
268 | ||
269 | if (tls_keypath) | |
270 | _cupsStrFree(tls_keypath); | |
271 | ||
272 | if (tls_common_name) | |
273 | _cupsStrFree(tls_common_name); | |
274 | ||
275 | /* | |
276 | * Save the new values... | |
277 | */ | |
278 | ||
279 | tls_keypath = _cupsStrAlloc(path); | |
280 | tls_auto_create = auto_create; | |
281 | tls_common_name = _cupsStrAlloc(common_name); | |
282 | ||
283 | _cupsMutexUnlock(&tls_mutex); | |
284 | ||
285 | return (1); | |
286 | } | |
287 | ||
288 | ||
289 | /* | |
290 | * 'httpCopyCredentials()' - Copy the credentials associated with the peer in | |
291 | * an encrypted connection. | |
292 | * | |
293 | * @since CUPS 1.5/OS X 10.7@ | |
294 | */ | |
295 | ||
296 | int /* O - Status of call (0 = success) */ | |
297 | httpCopyCredentials( | |
298 | http_t *http, /* I - Connection to server */ | |
299 | cups_array_t **credentials) /* O - Array of credentials */ | |
300 | { | |
301 | unsigned count; /* Number of certificates */ | |
302 | const gnutls_datum_t *certs; /* Certificates */ | |
303 | ||
304 | ||
305 | DEBUG_printf(("httpCopyCredentials(http=%p, credentials=%p)", http, credentials)); | |
306 | ||
307 | if (credentials) | |
308 | *credentials = NULL; | |
309 | ||
310 | if (!http || !http->tls || !credentials) | |
311 | return (-1); | |
312 | ||
313 | *credentials = cupsArrayNew(NULL, NULL); | |
314 | certs = gnutls_certificate_get_peers(http->tls, &count); | |
315 | ||
316 | DEBUG_printf(("1httpCopyCredentials: certs=%p, count=%u", certs, count)); | |
317 | ||
318 | if (certs && count) | |
319 | { | |
320 | while (count > 0) | |
321 | { | |
322 | httpAddCredential(*credentials, certs->data, certs->size); | |
323 | certs ++; | |
324 | count --; | |
325 | } | |
326 | } | |
327 | ||
328 | return (0); | |
329 | } | |
330 | ||
331 | ||
332 | /* | |
333 | * '_httpCreateCredentials()' - Create credentials in the internal format. | |
334 | */ | |
335 | ||
336 | http_tls_credentials_t /* O - Internal credentials */ | |
337 | _httpCreateCredentials( | |
338 | cups_array_t *credentials) /* I - Array of credentials */ | |
339 | { | |
340 | (void)credentials; | |
341 | ||
342 | return (NULL); | |
343 | } | |
344 | ||
345 | ||
346 | /* | |
347 | * '_httpFreeCredentials()' - Free internal credentials. | |
348 | */ | |
349 | ||
350 | void | |
351 | _httpFreeCredentials( | |
352 | http_tls_credentials_t credentials) /* I - Internal credentials */ | |
353 | { | |
354 | (void)credentials; | |
355 | } | |
356 | ||
357 | ||
358 | /* | |
359 | * 'httpCredentialsAreValidForName()' - Return whether the credentials are valid for the given name. | |
360 | * | |
5d2cc5d3 | 361 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
362 | */ |
363 | ||
364 | int /* O - 1 if valid, 0 otherwise */ | |
365 | httpCredentialsAreValidForName( | |
366 | cups_array_t *credentials, /* I - Credentials */ | |
367 | const char *common_name) /* I - Name to check */ | |
368 | { | |
369 | gnutls_x509_crt_t cert; /* Certificate */ | |
370 | int result = 0; /* Result */ | |
371 | ||
372 | ||
373 | cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
374 | if (cert) | |
375 | { | |
376 | result = gnutls_x509_crt_check_hostname(cert, common_name) != 0; | |
377 | gnutls_x509_crt_deinit(cert); | |
378 | } | |
379 | ||
380 | return (result); | |
381 | } | |
382 | ||
383 | ||
384 | /* | |
385 | * 'httpCredentialsGetTrust()' - Return the trust of credentials. | |
386 | * | |
5d2cc5d3 | 387 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
388 | */ |
389 | ||
390 | http_trust_t /* O - Level of trust */ | |
391 | httpCredentialsGetTrust( | |
392 | cups_array_t *credentials, /* I - Credentials */ | |
393 | const char *common_name) /* I - Common name for trust lookup */ | |
394 | { | |
395 | http_trust_t trust = HTTP_TRUST_OK; | |
396 | /* Trusted? */ | |
397 | gnutls_x509_crt_t cert; /* Certificate */ | |
398 | cups_array_t *tcreds = NULL; /* Trusted credentials */ | |
399 | _cups_globals_t *cg = _cupsGlobals(); | |
400 | /* Per-thread globals */ | |
401 | ||
402 | ||
403 | if (!common_name) | |
404 | return (HTTP_TRUST_UNKNOWN); | |
405 | ||
406 | if ((cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials))) == NULL) | |
407 | return (HTTP_TRUST_UNKNOWN); | |
408 | ||
409 | /* | |
410 | * Look this common name up in the default keychains... | |
411 | */ | |
412 | ||
413 | httpLoadCredentials(NULL, &tcreds, common_name); | |
414 | ||
415 | if (tcreds) | |
416 | { | |
417 | char credentials_str[1024], /* String for incoming credentials */ | |
418 | tcreds_str[1024]; /* String for saved credentials */ | |
419 | ||
420 | httpCredentialsString(credentials, credentials_str, sizeof(credentials_str)); | |
421 | httpCredentialsString(tcreds, tcreds_str, sizeof(tcreds_str)); | |
422 | ||
423 | if (strcmp(credentials_str, tcreds_str)) | |
424 | { | |
425 | /* | |
426 | * Credentials don't match, let's look at the expiration date of the new | |
427 | * credentials and allow if the new ones have a later expiration... | |
428 | */ | |
429 | ||
430 | if (httpCredentialsGetExpiration(credentials) <= httpCredentialsGetExpiration(tcreds) || | |
431 | !httpCredentialsAreValidForName(credentials, common_name)) | |
432 | { | |
433 | /* | |
434 | * Either the new credentials are not newly issued, or the common name | |
435 | * does not match the issued certificate... | |
436 | */ | |
437 | ||
438 | trust = HTTP_TRUST_INVALID; | |
439 | } | |
440 | else if (httpCredentialsGetExpiration(tcreds) < time(NULL)) | |
441 | { | |
442 | /* | |
443 | * Save the renewed credentials... | |
444 | */ | |
445 | ||
446 | trust = HTTP_TRUST_RENEWED; | |
447 | ||
448 | httpSaveCredentials(NULL, credentials, common_name); | |
449 | } | |
450 | } | |
451 | ||
452 | httpFreeCredentials(tcreds); | |
453 | } | |
454 | else if (cg->validate_certs && !httpCredentialsAreValidForName(credentials, common_name)) | |
455 | trust = HTTP_TRUST_INVALID; | |
456 | ||
457 | if (trust == HTTP_TRUST_OK && !cg->expired_certs) | |
458 | { | |
459 | time_t curtime; /* Current date/time */ | |
460 | ||
461 | time(&curtime); | |
462 | if (curtime < gnutls_x509_crt_get_activation_time(cert) || | |
463 | curtime > gnutls_x509_crt_get_expiration_time(cert)) | |
464 | trust = HTTP_TRUST_EXPIRED; | |
465 | } | |
466 | ||
467 | if (trust == HTTP_TRUST_OK && !cg->any_root && cupsArrayCount(credentials) == 1) | |
468 | trust = HTTP_TRUST_INVALID; | |
469 | ||
470 | gnutls_x509_crt_deinit(cert); | |
471 | ||
472 | return (trust); | |
473 | } | |
474 | ||
475 | ||
476 | /* | |
477 | * 'httpCredentialsGetExpiration()' - Return the expiration date of the credentials. | |
478 | * | |
5d2cc5d3 | 479 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
480 | */ |
481 | ||
482 | time_t /* O - Expiration date of credentials */ | |
483 | httpCredentialsGetExpiration( | |
484 | cups_array_t *credentials) /* I - Credentials */ | |
485 | { | |
486 | gnutls_x509_crt_t cert; /* Certificate */ | |
487 | time_t result = 0; /* Result */ | |
488 | ||
489 | ||
490 | cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
491 | if (cert) | |
492 | { | |
493 | result = gnutls_x509_crt_get_expiration_time(cert); | |
494 | gnutls_x509_crt_deinit(cert); | |
495 | } | |
496 | ||
497 | return (result); | |
498 | } | |
499 | ||
500 | ||
501 | /* | |
502 | * 'httpCredentialsString()' - Return a string representing the credentials. | |
503 | * | |
5d2cc5d3 | 504 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
505 | */ |
506 | ||
507 | size_t /* O - Total size of credentials string */ | |
508 | httpCredentialsString( | |
509 | cups_array_t *credentials, /* I - Credentials */ | |
510 | char *buffer, /* I - Buffer or @code NULL@ */ | |
511 | size_t bufsize) /* I - Size of buffer */ | |
512 | { | |
513 | http_credential_t *first; /* First certificate */ | |
514 | gnutls_x509_crt_t cert; /* Certificate */ | |
515 | ||
516 | ||
517 | DEBUG_printf(("httpCredentialsString(credentials=%p, buffer=%p, bufsize=" CUPS_LLFMT ")", credentials, buffer, CUPS_LLCAST bufsize)); | |
518 | ||
519 | if (!buffer) | |
520 | return (0); | |
521 | ||
522 | if (buffer && bufsize > 0) | |
523 | *buffer = '\0'; | |
524 | ||
525 | if ((first = (http_credential_t *)cupsArrayFirst(credentials)) != NULL && | |
526 | (cert = http_gnutls_create_credential(first)) != NULL) | |
527 | { | |
528 | char name[256]; /* Common name associated with cert */ | |
529 | size_t namelen; /* Length of name */ | |
530 | time_t expiration; /* Expiration date of cert */ | |
531 | _cups_md5_state_t md5_state; /* MD5 state */ | |
532 | unsigned char md5_digest[16]; /* MD5 result */ | |
533 | ||
534 | namelen = sizeof(name) - 1; | |
535 | if (gnutls_x509_crt_get_dn_by_oid(cert, GNUTLS_OID_X520_COMMON_NAME, 0, 0, name, &namelen) >= 0) | |
536 | name[namelen] = '\0'; | |
537 | else | |
538 | strlcpy(name, "unknown", sizeof(name)); | |
539 | ||
540 | expiration = gnutls_x509_crt_get_expiration_time(cert); | |
541 | ||
542 | _cupsMD5Init(&md5_state); | |
543 | _cupsMD5Append(&md5_state, first->data, (int)first->datalen); | |
544 | _cupsMD5Finish(&md5_state, md5_digest); | |
545 | ||
546 | 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]); | |
547 | ||
548 | gnutls_x509_crt_deinit(cert); | |
549 | } | |
550 | ||
551 | DEBUG_printf(("1httpCredentialsString: Returning \"%s\".", buffer)); | |
552 | ||
553 | return (strlen(buffer)); | |
554 | } | |
555 | ||
556 | ||
557 | /* | |
558 | * 'httpLoadCredentials()' - Load X.509 credentials from a keychain file. | |
559 | * | |
5d2cc5d3 | 560 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
561 | */ |
562 | ||
563 | int /* O - 0 on success, -1 on error */ | |
564 | httpLoadCredentials( | |
565 | const char *path, /* I - Keychain/PKCS#12 path */ | |
566 | cups_array_t **credentials, /* IO - Credentials */ | |
567 | const char *common_name) /* I - Common name for credentials */ | |
568 | { | |
569 | cups_file_t *fp; /* Certificate file */ | |
570 | char filename[1024], /* filename.crt */ | |
571 | temp[1024], /* Temporary string */ | |
572 | line[256]; /* Base64-encoded line */ | |
573 | unsigned char *data = NULL; /* Buffer for cert data */ | |
574 | size_t alloc_data = 0, /* Bytes allocated */ | |
575 | num_data = 0; /* Bytes used */ | |
576 | int decoded; /* Bytes decoded */ | |
577 | ||
578 | ||
579 | if (!credentials || !common_name) | |
580 | return (-1); | |
581 | ||
582 | if (!path) | |
583 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
584 | if (!path) | |
585 | return (-1); | |
586 | ||
587 | http_gnutls_make_path(filename, sizeof(filename), path, common_name, "crt"); | |
588 | ||
589 | if ((fp = cupsFileOpen(filename, "r")) == NULL) | |
590 | return (-1); | |
591 | ||
592 | while (cupsFileGets(fp, line, sizeof(line))) | |
593 | { | |
594 | if (!strcmp(line, "-----BEGIN CERTIFICATE-----")) | |
595 | { | |
596 | if (num_data) | |
597 | { | |
598 | /* | |
599 | * Missing END CERTIFICATE... | |
600 | */ | |
601 | ||
602 | httpFreeCredentials(*credentials); | |
603 | *credentials = NULL; | |
604 | break; | |
605 | } | |
606 | } | |
607 | else if (!strcmp(line, "-----END CERTIFICATE-----")) | |
608 | { | |
609 | if (!num_data) | |
610 | { | |
611 | /* | |
612 | * Missing data... | |
613 | */ | |
614 | ||
615 | httpFreeCredentials(*credentials); | |
616 | *credentials = NULL; | |
617 | break; | |
618 | } | |
619 | ||
620 | if (!*credentials) | |
621 | *credentials = cupsArrayNew(NULL, NULL); | |
622 | ||
623 | if (httpAddCredential(*credentials, data, num_data)) | |
624 | { | |
625 | httpFreeCredentials(*credentials); | |
626 | *credentials = NULL; | |
627 | break; | |
628 | } | |
629 | ||
630 | num_data = 0; | |
631 | } | |
632 | else | |
633 | { | |
634 | if (alloc_data == 0) | |
635 | { | |
636 | data = malloc(2048); | |
637 | alloc_data = 2048; | |
638 | ||
639 | if (!data) | |
640 | break; | |
641 | } | |
642 | else if ((num_data + strlen(line)) >= alloc_data) | |
643 | { | |
644 | unsigned char *tdata = realloc(data, alloc_data + 1024); | |
645 | /* Expanded buffer */ | |
646 | ||
647 | if (!tdata) | |
648 | { | |
649 | httpFreeCredentials(*credentials); | |
650 | *credentials = NULL; | |
651 | break; | |
652 | } | |
653 | ||
654 | data = tdata; | |
655 | alloc_data += 1024; | |
656 | } | |
657 | ||
658 | decoded = alloc_data - num_data; | |
659 | httpDecode64_2((char *)data + num_data, &decoded, line); | |
660 | num_data += (size_t)decoded; | |
661 | } | |
662 | } | |
663 | ||
664 | cupsFileClose(fp); | |
665 | ||
666 | if (num_data) | |
667 | { | |
668 | /* | |
669 | * Missing END CERTIFICATE... | |
670 | */ | |
671 | ||
672 | httpFreeCredentials(*credentials); | |
673 | *credentials = NULL; | |
674 | } | |
675 | ||
676 | if (data) | |
677 | free(data); | |
678 | ||
679 | return (*credentials ? 0 : -1); | |
680 | } | |
681 | ||
682 | ||
683 | /* | |
684 | * 'httpSaveCredentials()' - Save X.509 credentials to a keychain file. | |
685 | * | |
5d2cc5d3 | 686 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
687 | */ |
688 | ||
689 | int /* O - -1 on error, 0 on success */ | |
690 | httpSaveCredentials( | |
691 | const char *path, /* I - Keychain/PKCS#12 path */ | |
692 | cups_array_t *credentials, /* I - Credentials */ | |
693 | const char *common_name) /* I - Common name for credentials */ | |
694 | { | |
695 | cups_file_t *fp; /* Certificate file */ | |
696 | char filename[1024], /* filename.crt */ | |
697 | nfilename[1024],/* filename.crt.N */ | |
698 | temp[1024], /* Temporary string */ | |
699 | line[256]; /* Base64-encoded line */ | |
700 | const unsigned char *ptr; /* Pointer into certificate */ | |
701 | ssize_t remaining; /* Bytes left */ | |
702 | http_credential_t *cred; /* Current credential */ | |
703 | ||
704 | ||
705 | if (!credentials || !common_name) | |
706 | return (-1); | |
707 | ||
708 | if (!path) | |
709 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
710 | if (!path) | |
711 | return (-1); | |
712 | ||
713 | http_gnutls_make_path(filename, sizeof(filename), path, common_name, "crt"); | |
714 | snprintf(nfilename, sizeof(nfilename), "%s.N", filename); | |
715 | ||
716 | if ((fp = cupsFileOpen(nfilename, "w")) == NULL) | |
717 | return (-1); | |
718 | ||
719 | fchmod(cupsFileNumber(fp), 0600); | |
720 | ||
721 | for (cred = (http_credential_t *)cupsArrayFirst(credentials); | |
722 | cred; | |
723 | cred = (http_credential_t *)cupsArrayNext(credentials)) | |
724 | { | |
725 | cupsFilePuts(fp, "-----BEGIN CERTIFICATE-----\n"); | |
726 | for (ptr = cred->data, remaining = (ssize_t)cred->datalen; remaining > 0; remaining -= 45, ptr += 45) | |
727 | { | |
728 | httpEncode64_2(line, sizeof(line), (char *)ptr, remaining > 45 ? 45 : remaining); | |
729 | cupsFilePrintf(fp, "%s\n", line); | |
730 | } | |
731 | cupsFilePuts(fp, "-----END CERTIFICATE-----\n"); | |
732 | } | |
733 | ||
734 | cupsFileClose(fp); | |
735 | ||
736 | return (rename(nfilename, filename)); | |
737 | } | |
738 | ||
739 | ||
740 | /* | |
741 | * 'http_gnutls_create_credential()' - Create a single credential in the internal format. | |
742 | */ | |
743 | ||
744 | static gnutls_x509_crt_t /* O - Certificate */ | |
745 | http_gnutls_create_credential( | |
746 | http_credential_t *credential) /* I - Credential */ | |
747 | { | |
748 | int result; /* Result from GNU TLS */ | |
749 | gnutls_x509_crt_t cert; /* Certificate */ | |
750 | gnutls_datum_t datum; /* Data record */ | |
751 | ||
752 | ||
753 | DEBUG_printf(("3http_gnutls_create_credential(credential=%p)", credential)); | |
754 | ||
755 | if (!credential) | |
756 | return (NULL); | |
757 | ||
758 | if ((result = gnutls_x509_crt_init(&cert)) < 0) | |
759 | { | |
760 | DEBUG_printf(("4http_gnutls_create_credential: init error: %s", gnutls_strerror(result))); | |
761 | return (NULL); | |
762 | } | |
763 | ||
764 | datum.data = credential->data; | |
765 | datum.size = credential->datalen; | |
766 | ||
767 | if ((result = gnutls_x509_crt_import(cert, &datum, GNUTLS_X509_FMT_DER)) < 0) | |
768 | { | |
769 | DEBUG_printf(("4http_gnutls_create_credential: import error: %s", gnutls_strerror(result))); | |
770 | ||
771 | gnutls_x509_crt_deinit(cert); | |
772 | return (NULL); | |
773 | } | |
774 | ||
775 | return (cert); | |
776 | } | |
777 | ||
778 | ||
779 | /* | |
780 | * 'http_gnutls_default_path()' - Get the default credential store path. | |
781 | */ | |
782 | ||
783 | static const char * /* O - Path or NULL on error */ | |
784 | http_gnutls_default_path(char *buffer,/* I - Path buffer */ | |
785 | size_t bufsize)/* I - Size of path buffer */ | |
786 | { | |
787 | const char *home = getenv("HOME"); /* HOME environment variable */ | |
788 | ||
789 | ||
790 | if (getuid() && home) | |
791 | { | |
792 | snprintf(buffer, bufsize, "%s/.cups", home); | |
793 | if (access(buffer, 0)) | |
794 | { | |
795 | DEBUG_printf(("1http_gnutls_default_path: Making directory \"%s\".", buffer)); | |
796 | if (mkdir(buffer, 0700)) | |
797 | { | |
798 | DEBUG_printf(("1http_gnutls_default_path: Failed to make directory: %s", strerror(errno))); | |
799 | return (NULL); | |
800 | } | |
801 | } | |
802 | ||
803 | snprintf(buffer, bufsize, "%s/.cups/ssl", home); | |
804 | if (access(buffer, 0)) | |
805 | { | |
806 | DEBUG_printf(("1http_gnutls_default_path: Making directory \"%s\".", buffer)); | |
807 | if (mkdir(buffer, 0700)) | |
808 | { | |
809 | DEBUG_printf(("1http_gnutls_default_path: Failed to make directory: %s", strerror(errno))); | |
810 | return (NULL); | |
811 | } | |
812 | } | |
813 | } | |
814 | else | |
815 | strlcpy(buffer, CUPS_SERVERROOT "/ssl", bufsize); | |
816 | ||
817 | DEBUG_printf(("1http_gnutls_default_path: Using default path \"%s\".", buffer)); | |
818 | ||
819 | return (buffer); | |
820 | } | |
821 | ||
822 | ||
823 | /* | |
824 | * 'http_gnutls_make_path()' - Format a filename for a certificate or key file. | |
825 | */ | |
826 | ||
827 | static const char * /* O - Filename */ | |
828 | http_gnutls_make_path( | |
829 | char *buffer, /* I - Filename buffer */ | |
830 | size_t bufsize, /* I - Size of buffer */ | |
831 | const char *dirname, /* I - Directory */ | |
832 | const char *filename, /* I - Filename (usually hostname) */ | |
833 | const char *ext) /* I - Extension */ | |
834 | { | |
835 | char *bufptr, /* Pointer into buffer */ | |
836 | *bufend = buffer + bufsize - 1; /* End of buffer */ | |
837 | ||
838 | ||
839 | snprintf(buffer, bufsize, "%s/", dirname); | |
840 | bufptr = buffer + strlen(buffer); | |
841 | ||
842 | while (*filename && bufptr < bufend) | |
843 | { | |
844 | if (_cups_isalnum(*filename) || *filename == '-' || *filename == '.') | |
845 | *bufptr++ = *filename; | |
846 | else | |
847 | *bufptr++ = '_'; | |
848 | ||
849 | filename ++; | |
850 | } | |
851 | ||
852 | if (bufptr < bufend) | |
853 | *bufptr++ = '.'; | |
854 | ||
855 | strlcpy(bufptr, ext, (size_t)(bufend - bufptr + 1)); | |
856 | ||
857 | return (buffer); | |
858 | } | |
859 | ||
860 | ||
861 | /* | |
862 | * 'http_gnutls_read()' - Read function for the GNU TLS library. | |
863 | */ | |
864 | ||
865 | static ssize_t /* O - Number of bytes read or -1 on error */ | |
866 | http_gnutls_read( | |
867 | gnutls_transport_ptr_t ptr, /* I - Connection to server */ | |
868 | void *data, /* I - Buffer */ | |
869 | size_t length) /* I - Number of bytes to read */ | |
870 | { | |
871 | http_t *http; /* HTTP connection */ | |
872 | ssize_t bytes; /* Bytes read */ | |
873 | ||
874 | ||
875 | DEBUG_printf(("6http_gnutls_read(ptr=%p, data=%p, length=%d)", ptr, data, (int)length)); | |
876 | ||
877 | http = (http_t *)ptr; | |
878 | ||
879 | if (!http->blocking) | |
880 | { | |
881 | /* | |
882 | * Make sure we have data before we read... | |
883 | */ | |
884 | ||
885 | while (!_httpWait(http, http->wait_value, 0)) | |
886 | { | |
887 | if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) | |
888 | continue; | |
889 | ||
890 | http->error = ETIMEDOUT; | |
891 | return (-1); | |
892 | } | |
893 | } | |
894 | ||
895 | bytes = recv(http->fd, data, length, 0); | |
896 | DEBUG_printf(("6http_gnutls_read: bytes=%d", (int)bytes)); | |
897 | return (bytes); | |
898 | } | |
899 | ||
900 | ||
901 | /* | |
902 | * 'http_gnutls_write()' - Write function for the GNU TLS library. | |
903 | */ | |
904 | ||
905 | static ssize_t /* O - Number of bytes written or -1 on error */ | |
906 | http_gnutls_write( | |
907 | gnutls_transport_ptr_t ptr, /* I - Connection to server */ | |
908 | const void *data, /* I - Data buffer */ | |
909 | size_t length) /* I - Number of bytes to write */ | |
910 | { | |
911 | ssize_t bytes; /* Bytes written */ | |
912 | ||
913 | ||
914 | DEBUG_printf(("6http_gnutls_write(ptr=%p, data=%p, length=%d)", ptr, data, | |
915 | (int)length)); | |
916 | bytes = send(((http_t *)ptr)->fd, data, length, 0); | |
917 | DEBUG_printf(("http_gnutls_write: bytes=%d", (int)bytes)); | |
918 | ||
919 | return (bytes); | |
920 | } | |
921 | ||
922 | ||
923 | /* | |
924 | * '_httpTLSInitialize()' - Initialize the TLS stack. | |
925 | */ | |
926 | ||
927 | void | |
928 | _httpTLSInitialize(void) | |
929 | { | |
930 | /* | |
931 | * Initialize GNU TLS... | |
932 | */ | |
933 | ||
934 | gnutls_global_init(); | |
935 | } | |
936 | ||
937 | ||
938 | /* | |
939 | * '_httpTLSPending()' - Return the number of pending TLS-encrypted bytes. | |
940 | */ | |
941 | ||
942 | size_t /* O - Bytes available */ | |
943 | _httpTLSPending(http_t *http) /* I - HTTP connection */ | |
944 | { | |
945 | return (gnutls_record_check_pending(http->tls)); | |
946 | } | |
947 | ||
948 | ||
949 | /* | |
950 | * '_httpTLSRead()' - Read from a SSL/TLS connection. | |
951 | */ | |
952 | ||
953 | int /* O - Bytes read */ | |
954 | _httpTLSRead(http_t *http, /* I - Connection to server */ | |
955 | char *buf, /* I - Buffer to store data */ | |
956 | int len) /* I - Length of buffer */ | |
957 | { | |
958 | ssize_t result; /* Return value */ | |
959 | ||
960 | ||
961 | result = gnutls_record_recv(http->tls, buf, (size_t)len); | |
962 | ||
963 | if (result < 0 && !errno) | |
964 | { | |
965 | /* | |
966 | * Convert GNU TLS error to errno value... | |
967 | */ | |
968 | ||
969 | switch (result) | |
970 | { | |
971 | case GNUTLS_E_INTERRUPTED : | |
972 | errno = EINTR; | |
973 | break; | |
974 | ||
975 | case GNUTLS_E_AGAIN : | |
976 | errno = EAGAIN; | |
977 | break; | |
978 | ||
979 | default : | |
980 | errno = EPIPE; | |
981 | break; | |
982 | } | |
983 | ||
984 | result = -1; | |
985 | } | |
986 | ||
987 | return ((int)result); | |
988 | } | |
989 | ||
990 | ||
991 | /* | |
992 | * '_httpTLSSetCredentials()' - Set the TLS credentials. | |
993 | */ | |
994 | ||
995 | int /* O - Status of connection */ | |
996 | _httpTLSSetCredentials(http_t *http) /* I - Connection to server */ | |
997 | { | |
998 | (void)http; | |
999 | ||
1000 | return (0); | |
1001 | } | |
1002 | ||
1003 | ||
1004 | /* | |
1005 | * '_httpTLSStart()' - Set up SSL/TLS support on a connection. | |
1006 | */ | |
1007 | ||
1008 | int /* O - 0 on success, -1 on failure */ | |
1009 | _httpTLSStart(http_t *http) /* I - Connection to server */ | |
1010 | { | |
1011 | char hostname[256], /* Hostname */ | |
1012 | *hostptr; /* Pointer into hostname */ | |
1013 | int status; /* Status of handshake */ | |
1014 | gnutls_certificate_credentials_t *credentials; | |
1015 | /* TLS credentials */ | |
1016 | ||
1017 | ||
1018 | DEBUG_printf(("7_httpTLSStart(http=%p)", http)); | |
1019 | ||
1020 | if (http->mode == _HTTP_MODE_SERVER && !tls_keypath) | |
1021 | { | |
1022 | DEBUG_puts("4_httpTLSStart: cupsSetServerCredentials not called."); | |
1023 | http->error = errno = EINVAL; | |
1024 | http->status = HTTP_STATUS_ERROR; | |
1025 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Server credentials not set."), 1); | |
1026 | ||
1027 | return (-1); | |
1028 | } | |
1029 | ||
1030 | credentials = (gnutls_certificate_credentials_t *) | |
1031 | malloc(sizeof(gnutls_certificate_credentials_t)); | |
1032 | if (credentials == NULL) | |
1033 | { | |
1034 | DEBUG_printf(("8_httpStartTLS: Unable to allocate credentials: %s", | |
1035 | strerror(errno))); | |
1036 | http->error = errno; | |
1037 | http->status = HTTP_STATUS_ERROR; | |
1038 | _cupsSetHTTPError(HTTP_STATUS_ERROR); | |
1039 | ||
1040 | return (-1); | |
1041 | } | |
1042 | ||
1043 | gnutls_certificate_allocate_credentials(credentials); | |
1044 | status = gnutls_init(&http->tls, http->mode == _HTTP_MODE_CLIENT ? GNUTLS_CLIENT : GNUTLS_SERVER); | |
1045 | if (!status) | |
1046 | status = gnutls_set_default_priority(http->tls); | |
1047 | ||
1048 | if (status) | |
1049 | { | |
1050 | http->error = EIO; | |
1051 | http->status = HTTP_STATUS_ERROR; | |
1052 | ||
1053 | DEBUG_printf(("4_httpTLSStart: Unable to initialize common TLS parameters: %s", gnutls_strerror(status))); | |
1054 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1055 | ||
1056 | gnutls_deinit(http->tls); | |
1057 | gnutls_certificate_free_credentials(*credentials); | |
1058 | free(credentials); | |
1059 | http->tls = NULL; | |
1060 | ||
1061 | return (-1); | |
1062 | } | |
1063 | ||
1064 | if (http->mode == _HTTP_MODE_CLIENT) | |
1065 | { | |
1066 | /* | |
1067 | * Client: get the hostname to use for TLS... | |
1068 | */ | |
1069 | ||
1070 | if (httpAddrLocalhost(http->hostaddr)) | |
1071 | { | |
1072 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
1073 | } | |
1074 | else | |
1075 | { | |
1076 | /* | |
1077 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
1078 | */ | |
1079 | ||
1080 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
1081 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
1082 | *hostptr == '.') | |
1083 | *hostptr = '\0'; | |
1084 | } | |
1085 | ||
1086 | status = gnutls_server_name_set(http->tls, GNUTLS_NAME_DNS, hostname, strlen(hostname)); | |
1087 | } | |
1088 | else | |
1089 | { | |
1090 | /* | |
1091 | * Server: get certificate and private key... | |
1092 | */ | |
1093 | ||
1094 | char crtfile[1024], /* Certificate file */ | |
1095 | keyfile[1024]; /* Private key file */ | |
1096 | int have_creds = 0; /* Have credentials? */ | |
1097 | ||
1098 | ||
1099 | if (http->fields[HTTP_FIELD_HOST][0]) | |
1100 | { | |
1101 | /* | |
1102 | * Use hostname for TLS upgrade... | |
1103 | */ | |
1104 | ||
1105 | strlcpy(hostname, http->fields[HTTP_FIELD_HOST], sizeof(hostname)); | |
1106 | } | |
1107 | else | |
1108 | { | |
1109 | /* | |
1110 | * Resolve hostname from connection address... | |
1111 | */ | |
1112 | ||
1113 | http_addr_t addr; /* Connection address */ | |
1114 | socklen_t addrlen; /* Length of address */ | |
1115 | ||
1116 | addrlen = sizeof(addr); | |
1117 | if (getsockname(http->fd, (struct sockaddr *)&addr, &addrlen)) | |
1118 | { | |
1119 | DEBUG_printf(("4_httpTLSStart: Unable to get socket address: %s", strerror(errno))); | |
1120 | hostname[0] = '\0'; | |
1121 | } | |
1122 | else if (httpAddrLocalhost(&addr)) | |
1123 | hostname[0] = '\0'; | |
1124 | else | |
1125 | { | |
1126 | httpAddrLookup(&addr, hostname, sizeof(hostname)); | |
1127 | DEBUG_printf(("4_httpTLSStart: Resolved socket address to \"%s\".", hostname)); | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | if (isdigit(hostname[0] & 255) || hostname[0] == '[') | |
1132 | hostname[0] = '\0'; /* Don't allow numeric addresses */ | |
1133 | ||
1134 | if (hostname[0]) | |
1135 | { | |
1136 | http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, hostname, "crt"); | |
1137 | http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, hostname, "key"); | |
1138 | ||
1139 | have_creds = !access(crtfile, 0) && !access(keyfile, 0); | |
1140 | } | |
1141 | else if (tls_common_name) | |
1142 | { | |
1143 | http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, tls_common_name, "crt"); | |
1144 | http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, tls_common_name, "key"); | |
1145 | ||
1146 | have_creds = !access(crtfile, 0) && !access(keyfile, 0); | |
1147 | } | |
1148 | ||
1149 | if (!have_creds && tls_auto_create && (hostname[0] || tls_common_name)) | |
1150 | { | |
1151 | DEBUG_printf(("4_httpTLSStart: Auto-create credentials for \"%s\".", hostname[0] ? hostname : tls_common_name)); | |
1152 | ||
1153 | if (!cupsMakeServerCredentials(tls_keypath, hostname[0] ? hostname : tls_common_name, 0, NULL, time(NULL) + 365 * 86400)) | |
1154 | { | |
1155 | DEBUG_puts("4_httpTLSStart: cupsMakeServerCredentials failed."); | |
1156 | http->error = errno = EINVAL; | |
1157 | http->status = HTTP_STATUS_ERROR; | |
1158 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unable to create server credentials."), 1); | |
1159 | ||
1160 | return (-1); | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | DEBUG_printf(("4_httpTLSStart: Using certificate \"%s\" and private key \"%s\".", crtfile, keyfile)); | |
1165 | ||
1166 | status = gnutls_certificate_set_x509_key_file(*credentials, crtfile, keyfile, GNUTLS_X509_FMT_PEM); | |
1167 | } | |
1168 | ||
1169 | if (!status) | |
1170 | status = gnutls_credentials_set(http->tls, GNUTLS_CRD_CERTIFICATE, *credentials); | |
1171 | ||
1172 | if (status) | |
1173 | { | |
1174 | http->error = EIO; | |
1175 | http->status = HTTP_STATUS_ERROR; | |
1176 | ||
1177 | DEBUG_printf(("4_httpTLSStart: Unable to complete client/server setup: %s", gnutls_strerror(status))); | |
1178 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1179 | ||
1180 | gnutls_deinit(http->tls); | |
1181 | gnutls_certificate_free_credentials(*credentials); | |
1182 | free(credentials); | |
1183 | http->tls = NULL; | |
1184 | ||
1185 | return (-1); | |
1186 | } | |
1187 | ||
1188 | gnutls_transport_set_ptr(http->tls, (gnutls_transport_ptr_t)http); | |
1189 | gnutls_transport_set_pull_function(http->tls, http_gnutls_read); | |
5d2cc5d3 | 1190 | #ifdef HAVE_GNUTLS_TRANSPORT_SET_PULL_TIMEOUT_FUNCTION |
1a18c85c | 1191 | gnutls_transport_set_pull_timeout_function(http->tls, (gnutls_pull_timeout_func)httpWait); |
5d2cc5d3 | 1192 | #endif /* HAVE_GNUTLS_TRANSPORT_SET_PULL_TIMEOUT_FUNCTION */ |
1a18c85c MS |
1193 | gnutls_transport_set_push_function(http->tls, http_gnutls_write); |
1194 | ||
1195 | while ((status = gnutls_handshake(http->tls)) != GNUTLS_E_SUCCESS) | |
1196 | { | |
1197 | DEBUG_printf(("5_httpStartTLS: gnutls_handshake returned %d (%s)", | |
1198 | status, gnutls_strerror(status))); | |
1199 | ||
1200 | if (gnutls_error_is_fatal(status)) | |
1201 | { | |
1202 | http->error = EIO; | |
1203 | http->status = HTTP_STATUS_ERROR; | |
1204 | ||
1205 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1206 | ||
1207 | gnutls_deinit(http->tls); | |
1208 | gnutls_certificate_free_credentials(*credentials); | |
1209 | free(credentials); | |
1210 | http->tls = NULL; | |
1211 | ||
1212 | return (-1); | |
1213 | } | |
1214 | } | |
1215 | ||
1216 | http->tls_credentials = credentials; | |
1217 | ||
1218 | return (0); | |
1219 | } | |
1220 | ||
1221 | ||
1222 | /* | |
1223 | * '_httpTLSStop()' - Shut down SSL/TLS on a connection. | |
1224 | */ | |
1225 | ||
1226 | void | |
1227 | _httpTLSStop(http_t *http) /* I - Connection to server */ | |
1228 | { | |
1229 | int error; /* Error code */ | |
1230 | ||
1231 | ||
1232 | error = gnutls_bye(http->tls, http->mode == _HTTP_MODE_CLIENT ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR); | |
1233 | if (error != GNUTLS_E_SUCCESS) | |
1234 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(errno), 0); | |
1235 | ||
1236 | gnutls_deinit(http->tls); | |
1237 | http->tls = NULL; | |
1238 | ||
1239 | if (http->tls_credentials) | |
1240 | { | |
1241 | gnutls_certificate_free_credentials(*(http->tls_credentials)); | |
1242 | free(http->tls_credentials); | |
1243 | http->tls_credentials = NULL; | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | ||
1248 | /* | |
1249 | * '_httpTLSWrite()' - Write to a SSL/TLS connection. | |
1250 | */ | |
1251 | ||
1252 | int /* O - Bytes written */ | |
1253 | _httpTLSWrite(http_t *http, /* I - Connection to server */ | |
1254 | const char *buf, /* I - Buffer holding data */ | |
1255 | int len) /* I - Length of buffer */ | |
1256 | { | |
1257 | ssize_t result; /* Return value */ | |
1258 | ||
1259 | ||
1260 | DEBUG_printf(("2http_write_ssl(http=%p, buf=%p, len=%d)", http, buf, len)); | |
1261 | ||
1262 | result = gnutls_record_send(http->tls, buf, (size_t)len); | |
1263 | ||
1264 | if (result < 0 && !errno) | |
1265 | { | |
1266 | /* | |
1267 | * Convert GNU TLS error to errno value... | |
1268 | */ | |
1269 | ||
1270 | switch (result) | |
1271 | { | |
1272 | case GNUTLS_E_INTERRUPTED : | |
1273 | errno = EINTR; | |
1274 | break; | |
1275 | ||
1276 | case GNUTLS_E_AGAIN : | |
1277 | errno = EAGAIN; | |
1278 | break; | |
1279 | ||
1280 | default : | |
1281 | errno = EPIPE; | |
1282 | break; | |
1283 | } | |
1284 | ||
1285 | result = -1; | |
1286 | } | |
1287 | ||
1288 | DEBUG_printf(("3http_write_ssl: Returning %d.", (int)result)); | |
1289 | ||
1290 | return ((int)result); | |
1291 | } | |
1292 | ||
1293 | ||
1294 | /* | |
b9367124 | 1295 | * End of "$Id: tls-gnutls.c 12159 2014-09-23 14:56:14Z msweet $". |
1a18c85c | 1296 | */ |