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Commit | Line | Data |
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2c85b752 MS |
1 | /* |
2 | * "$Id$" | |
3 | * | |
4 | * TLS support code for CUPS using GNU TLS. | |
5 | * | |
ef146940 | 6 | * Copyright 2007-2015 by Apple Inc. |
2c85b752 MS |
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 | ||
ebb24a07 | 18 | /**** This file is included from tls.c ****/ |
2c85b752 | 19 | |
d0facf48 MS |
20 | /* |
21 | * Include necessary headers... | |
22 | */ | |
23 | ||
24 | #include <sys/stat.h> | |
25 | ||
26 | ||
07623986 MS |
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 */ | |
63aefcd5 | 39 | static int tls_options = 0;/* Options for TLS connections */ |
07623986 MS |
40 | |
41 | ||
2c85b752 MS |
42 | /* |
43 | * Local functions... | |
44 | */ | |
45 | ||
ff82e169 | 46 | static gnutls_x509_crt_t http_gnutls_create_credential(http_credential_t *credential); |
d0facf48 | 47 | static const char *http_gnutls_default_path(char *buffer, size_t bufsize); |
a2751f30 | 48 | static const char *http_gnutls_make_path(char *buffer, size_t bufsize, const char *dirname, const char *filename, const char *ext); |
d0facf48 MS |
49 | static ssize_t http_gnutls_read(gnutls_transport_ptr_t ptr, void *data, size_t length); |
50 | static ssize_t http_gnutls_write(gnutls_transport_ptr_t ptr, const void *data, size_t length); | |
dd332638 MS |
51 | |
52 | ||
07623986 MS |
53 | /* |
54 | * 'cupsMakeServerCredentials()' - Make a self-signed certificate and private key pair. | |
55 | * | |
e1f19878 | 56 | * @since CUPS 2.0/OS 10.10@ |
07623986 MS |
57 | */ |
58 | ||
59 | int /* O - 1 on success, 0 on failure */ | |
60 | cupsMakeServerCredentials( | |
61 | const char *path, /* I - Path to keychain/directory */ | |
62 | const char *common_name, /* I - Common name */ | |
63 | int num_alt_names, /* I - Number of subject alternate names */ | |
64 | const char **alt_names, /* I - Subject Alternate Names */ | |
65 | time_t expiration_date) /* I - Expiration date */ | |
66 | { | |
f394e0f7 MS |
67 | gnutls_x509_crt_t crt; /* Self-signed certificate */ |
68 | gnutls_x509_privkey_t key; /* Encryption private key */ | |
69 | char temp[1024], /* Temporary directory name */ | |
70 | crtfile[1024], /* Certificate filename */ | |
172bdf5d MS |
71 | keyfile[1024]; /* Private key filename */ |
72 | cups_lang_t *language; /* Default language info */ | |
73 | cups_file_t *fp; /* Key/cert file */ | |
74 | unsigned char buffer[8192]; /* Buffer for x509 data */ | |
75 | size_t bytes; /* Number of bytes of data */ | |
76 | unsigned char serial[4]; /* Serial number buffer */ | |
77 | time_t curtime; /* Current time */ | |
78 | int result; /* Result of GNU TLS calls */ | |
07623986 | 79 | |
172bdf5d MS |
80 | |
81 | 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)); | |
82 | ||
83 | /* | |
84 | * Filenames... | |
85 | */ | |
86 | ||
87 | if (!path) | |
d0facf48 | 88 | path = http_gnutls_default_path(temp, sizeof(temp)); |
172bdf5d | 89 | |
d0facf48 MS |
90 | if (!path || !common_name) |
91 | { | |
92 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0); | |
93 | return (0); | |
172bdf5d | 94 | } |
26435c51 MS |
95 | |
96 | http_gnutls_make_path(crtfile, sizeof(crtfile), path, common_name, "crt"); | |
97 | http_gnutls_make_path(keyfile, sizeof(keyfile), path, common_name, "key"); | |
172bdf5d MS |
98 | |
99 | /* | |
100 | * Create the encryption key... | |
101 | */ | |
102 | ||
d0facf48 MS |
103 | DEBUG_puts("1cupsMakeServerCredentials: Creating key pair."); |
104 | ||
172bdf5d MS |
105 | gnutls_x509_privkey_init(&key); |
106 | gnutls_x509_privkey_generate(key, GNUTLS_PK_RSA, 2048, 0); | |
107 | ||
d0facf48 MS |
108 | DEBUG_puts("1cupsMakeServerCredentials: Key pair created."); |
109 | ||
172bdf5d MS |
110 | /* |
111 | * Save it... | |
112 | */ | |
113 | ||
114 | bytes = sizeof(buffer); | |
115 | ||
d0facf48 | 116 | if ((result = gnutls_x509_privkey_export(key, GNUTLS_X509_FMT_PEM, buffer, &bytes)) < 0) |
172bdf5d | 117 | { |
d0facf48 | 118 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to export private key: %s", gnutls_strerror(result))); |
172bdf5d MS |
119 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(result), 0); |
120 | gnutls_x509_privkey_deinit(key); | |
121 | return (0); | |
122 | } | |
123 | else if ((fp = cupsFileOpen(keyfile, "w")) != NULL) | |
124 | { | |
d0facf48 | 125 | DEBUG_printf(("1cupsMakeServerCredentials: Writing private key to \"%s\".", keyfile)); |
172bdf5d MS |
126 | cupsFileWrite(fp, (char *)buffer, bytes); |
127 | cupsFileClose(fp); | |
128 | } | |
129 | else | |
130 | { | |
d0facf48 | 131 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to create private key file \"%s\": %s", keyfile, strerror(errno))); |
172bdf5d MS |
132 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
133 | gnutls_x509_privkey_deinit(key); | |
134 | return (0); | |
135 | } | |
136 | ||
137 | /* | |
138 | * Create the self-signed certificate... | |
139 | */ | |
140 | ||
d0facf48 | 141 | DEBUG_puts("1cupsMakeServerCredentials: Generating self-signed X.509 certificate."); |
172bdf5d MS |
142 | |
143 | language = cupsLangDefault(); | |
144 | curtime = time(NULL); | |
145 | serial[0] = curtime >> 24; | |
146 | serial[1] = curtime >> 16; | |
147 | serial[2] = curtime >> 8; | |
148 | serial[3] = curtime; | |
149 | ||
150 | gnutls_x509_crt_init(&crt); | |
151 | if (strlen(language->language) == 5) | |
152 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0, | |
153 | language->language + 3, 2); | |
154 | else | |
155 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0, | |
156 | "US", 2); | |
157 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0, | |
158 | common_name, strlen(common_name)); | |
159 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATION_NAME, 0, | |
160 | common_name, strlen(common_name)); | |
161 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATIONAL_UNIT_NAME, | |
162 | 0, "Unknown", 7); | |
163 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_STATE_OR_PROVINCE_NAME, 0, | |
164 | "Unknown", 7); | |
165 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_LOCALITY_NAME, 0, | |
166 | "Unknown", 7); | |
167 | /* gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_PKCS9_EMAIL, 0, | |
168 | ServerAdmin, strlen(ServerAdmin));*/ | |
169 | gnutls_x509_crt_set_key(crt, key); | |
170 | gnutls_x509_crt_set_serial(crt, serial, sizeof(serial)); | |
171 | gnutls_x509_crt_set_activation_time(crt, curtime); | |
172 | gnutls_x509_crt_set_expiration_time(crt, curtime + 10 * 365 * 86400); | |
173 | gnutls_x509_crt_set_ca_status(crt, 0); | |
174 | if (num_alt_names > 0) | |
175 | gnutls_x509_crt_set_subject_alternative_name(crt, GNUTLS_SAN_DNSNAME, alt_names[0]); | |
176 | gnutls_x509_crt_set_key_purpose_oid(crt, GNUTLS_KP_TLS_WWW_SERVER, 0); | |
177 | gnutls_x509_crt_set_key_usage(crt, GNUTLS_KEY_KEY_ENCIPHERMENT); | |
178 | gnutls_x509_crt_set_version(crt, 3); | |
179 | ||
180 | bytes = sizeof(buffer); | |
181 | if (gnutls_x509_crt_get_key_id(crt, 0, buffer, &bytes) >= 0) | |
182 | gnutls_x509_crt_set_subject_key_id(crt, buffer, bytes); | |
183 | ||
184 | gnutls_x509_crt_sign(crt, crt, key); | |
185 | ||
186 | /* | |
187 | * Save it... | |
188 | */ | |
189 | ||
190 | bytes = sizeof(buffer); | |
191 | if ((result = gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, buffer, &bytes)) < 0) | |
192 | { | |
d0facf48 | 193 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to export public key and X.509 certificate: %s", gnutls_strerror(result))); |
172bdf5d MS |
194 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(result), 0); |
195 | gnutls_x509_crt_deinit(crt); | |
196 | gnutls_x509_privkey_deinit(key); | |
197 | return (0); | |
198 | } | |
199 | else if ((fp = cupsFileOpen(crtfile, "w")) != NULL) | |
200 | { | |
d0facf48 | 201 | DEBUG_printf(("1cupsMakeServerCredentials: Writing public key and X.509 certificate to \"%s\".", crtfile)); |
172bdf5d MS |
202 | cupsFileWrite(fp, (char *)buffer, bytes); |
203 | cupsFileClose(fp); | |
204 | } | |
205 | else | |
206 | { | |
d0facf48 | 207 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to create public key and X.509 certificate file \"%s\": %s", crtfile, strerror(errno))); |
172bdf5d MS |
208 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
209 | gnutls_x509_crt_deinit(crt); | |
210 | gnutls_x509_privkey_deinit(key); | |
211 | return (0); | |
212 | } | |
213 | ||
214 | /* | |
215 | * Cleanup... | |
216 | */ | |
217 | ||
218 | gnutls_x509_crt_deinit(crt); | |
219 | gnutls_x509_privkey_deinit(key); | |
220 | ||
d0facf48 MS |
221 | DEBUG_puts("1cupsMakeServerCredentials: Successfully created credentials."); |
222 | ||
172bdf5d | 223 | return (1); |
07623986 MS |
224 | } |
225 | ||
226 | ||
227 | /* | |
228 | * 'cupsSetServerCredentials()' - Set the default server credentials. | |
229 | * | |
230 | * Note: The server credentials are used by all threads in the running process. | |
231 | * This function is threadsafe. | |
232 | * | |
e1f19878 | 233 | * @since CUPS 2.0/OS 10.10@ |
07623986 MS |
234 | */ |
235 | ||
236 | int /* O - 1 on success, 0 on failure */ | |
237 | cupsSetServerCredentials( | |
238 | const char *path, /* I - Path to keychain/directory */ | |
239 | const char *common_name, /* I - Default common name for server */ | |
240 | int auto_create) /* I - 1 = automatically create self-signed certificates */ | |
241 | { | |
f394e0f7 | 242 | char temp[1024]; /* Default path buffer */ |
172bdf5d MS |
243 | |
244 | ||
245 | DEBUG_printf(("cupsSetServerCredentials(path=\"%s\", common_name=\"%s\", auto_create=%d)", path, common_name, auto_create)); | |
246 | ||
07623986 | 247 | /* |
d0facf48 | 248 | * Use defaults as needed... |
07623986 MS |
249 | */ |
250 | ||
d0facf48 MS |
251 | if (!path) |
252 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
07623986 | 253 | |
172bdf5d | 254 | /* |
d0facf48 | 255 | * Range check input... |
172bdf5d MS |
256 | */ |
257 | ||
d0facf48 | 258 | if (!path || !common_name) |
172bdf5d | 259 | { |
d0facf48 MS |
260 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0); |
261 | return (0); | |
262 | } | |
172bdf5d | 263 | |
d0facf48 MS |
264 | _cupsMutexLock(&tls_mutex); |
265 | ||
266 | /* | |
267 | * Free old values... | |
268 | */ | |
172bdf5d | 269 | |
d0facf48 MS |
270 | if (tls_keypath) |
271 | _cupsStrFree(tls_keypath); | |
172bdf5d | 272 | |
d0facf48 MS |
273 | if (tls_common_name) |
274 | _cupsStrFree(tls_common_name); | |
172bdf5d | 275 | |
07623986 MS |
276 | /* |
277 | * Save the new values... | |
278 | */ | |
279 | ||
280 | tls_keypath = _cupsStrAlloc(path); | |
281 | tls_auto_create = auto_create; | |
282 | tls_common_name = _cupsStrAlloc(common_name); | |
283 | ||
284 | _cupsMutexUnlock(&tls_mutex); | |
285 | ||
286 | return (1); | |
287 | } | |
288 | ||
289 | ||
dd332638 MS |
290 | /* |
291 | * 'httpCopyCredentials()' - Copy the credentials associated with the peer in | |
292 | * an encrypted connection. | |
293 | * | |
294 | * @since CUPS 1.5/OS X 10.7@ | |
295 | */ | |
296 | ||
297 | int /* O - Status of call (0 = success) */ | |
298 | httpCopyCredentials( | |
299 | http_t *http, /* I - Connection to server */ | |
300 | cups_array_t **credentials) /* O - Array of credentials */ | |
301 | { | |
bdc8d1ad MS |
302 | unsigned count; /* Number of certificates */ |
303 | const gnutls_datum_t *certs; /* Certificates */ | |
304 | ||
305 | ||
306 | DEBUG_printf(("httpCopyCredentials(http=%p, credentials=%p)", http, credentials)); | |
307 | ||
dd332638 MS |
308 | if (credentials) |
309 | *credentials = NULL; | |
310 | ||
311 | if (!http || !http->tls || !credentials) | |
312 | return (-1); | |
313 | ||
bdc8d1ad MS |
314 | *credentials = cupsArrayNew(NULL, NULL); |
315 | certs = gnutls_certificate_get_peers(http->tls, &count); | |
316 | ||
317 | DEBUG_printf(("1httpCopyCredentials: certs=%p, count=%u", certs, count)); | |
318 | ||
319 | if (certs && count) | |
320 | { | |
321 | while (count > 0) | |
322 | { | |
323 | httpAddCredential(*credentials, certs->data, certs->size); | |
324 | certs ++; | |
325 | count --; | |
326 | } | |
327 | } | |
328 | ||
dd332638 MS |
329 | return (0); |
330 | } | |
331 | ||
332 | ||
333 | /* | |
334 | * '_httpCreateCredentials()' - Create credentials in the internal format. | |
335 | */ | |
336 | ||
337 | http_tls_credentials_t /* O - Internal credentials */ | |
338 | _httpCreateCredentials( | |
339 | cups_array_t *credentials) /* I - Array of credentials */ | |
340 | { | |
341 | (void)credentials; | |
342 | ||
343 | return (NULL); | |
344 | } | |
345 | ||
346 | ||
347 | /* | |
348 | * '_httpFreeCredentials()' - Free internal credentials. | |
349 | */ | |
350 | ||
351 | void | |
352 | _httpFreeCredentials( | |
353 | http_tls_credentials_t credentials) /* I - Internal credentials */ | |
354 | { | |
355 | (void)credentials; | |
356 | } | |
357 | ||
358 | ||
a15960a1 MS |
359 | /* |
360 | * 'httpCredentialsAreValidForName()' - Return whether the credentials are valid for the given name. | |
361 | * | |
e1f19878 | 362 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
363 | */ |
364 | ||
365 | int /* O - 1 if valid, 0 otherwise */ | |
366 | httpCredentialsAreValidForName( | |
367 | cups_array_t *credentials, /* I - Credentials */ | |
368 | const char *common_name) /* I - Name to check */ | |
369 | { | |
ff82e169 MS |
370 | gnutls_x509_crt_t cert; /* Certificate */ |
371 | int result = 0; /* Result */ | |
a15960a1 MS |
372 | |
373 | ||
ff82e169 MS |
374 | cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials)); |
375 | if (cert) | |
a15960a1 | 376 | { |
ff82e169 MS |
377 | result = gnutls_x509_crt_check_hostname(cert, common_name) != 0; |
378 | gnutls_x509_crt_deinit(cert); | |
a15960a1 | 379 | } |
a15960a1 | 380 | |
ff82e169 | 381 | return (result); |
a15960a1 MS |
382 | } |
383 | ||
384 | ||
385 | /* | |
386 | * 'httpCredentialsGetTrust()' - Return the trust of credentials. | |
387 | * | |
e1f19878 | 388 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
389 | */ |
390 | ||
391 | http_trust_t /* O - Level of trust */ | |
392 | httpCredentialsGetTrust( | |
393 | cups_array_t *credentials, /* I - Credentials */ | |
394 | const char *common_name) /* I - Common name for trust lookup */ | |
395 | { | |
396 | http_trust_t trust = HTTP_TRUST_OK; | |
397 | /* Trusted? */ | |
ff82e169 | 398 | gnutls_x509_crt_t cert; /* Certificate */ |
a15960a1 MS |
399 | cups_array_t *tcreds = NULL; /* Trusted credentials */ |
400 | _cups_globals_t *cg = _cupsGlobals(); | |
401 | /* Per-thread globals */ | |
402 | ||
403 | ||
404 | if (!common_name) | |
405 | return (HTTP_TRUST_UNKNOWN); | |
406 | ||
ff82e169 | 407 | if ((cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials))) == NULL) |
a15960a1 MS |
408 | return (HTTP_TRUST_UNKNOWN); |
409 | ||
3abb875b MS |
410 | if (cg->any_root < 0) |
411 | _cupsSetDefaults(); | |
412 | ||
a15960a1 MS |
413 | /* |
414 | * Look this common name up in the default keychains... | |
415 | */ | |
416 | ||
417 | httpLoadCredentials(NULL, &tcreds, common_name); | |
418 | ||
419 | if (tcreds) | |
420 | { | |
421 | char credentials_str[1024], /* String for incoming credentials */ | |
422 | tcreds_str[1024]; /* String for saved credentials */ | |
423 | ||
424 | httpCredentialsString(credentials, credentials_str, sizeof(credentials_str)); | |
425 | httpCredentialsString(tcreds, tcreds_str, sizeof(tcreds_str)); | |
426 | ||
427 | if (strcmp(credentials_str, tcreds_str)) | |
428 | { | |
429 | /* | |
430 | * Credentials don't match, let's look at the expiration date of the new | |
431 | * credentials and allow if the new ones have a later expiration... | |
432 | */ | |
433 | ||
434 | if (httpCredentialsGetExpiration(credentials) <= httpCredentialsGetExpiration(tcreds) || | |
435 | !httpCredentialsAreValidForName(credentials, common_name)) | |
436 | { | |
437 | /* | |
438 | * Either the new credentials are not newly issued, or the common name | |
439 | * does not match the issued certificate... | |
440 | */ | |
441 | ||
442 | trust = HTTP_TRUST_INVALID; | |
443 | } | |
444 | else if (httpCredentialsGetExpiration(tcreds) < time(NULL)) | |
445 | { | |
446 | /* | |
447 | * Save the renewed credentials... | |
448 | */ | |
449 | ||
450 | trust = HTTP_TRUST_RENEWED; | |
451 | ||
452 | httpSaveCredentials(NULL, credentials, common_name); | |
453 | } | |
454 | } | |
455 | ||
456 | httpFreeCredentials(tcreds); | |
457 | } | |
458 | else if (cg->validate_certs && !httpCredentialsAreValidForName(credentials, common_name)) | |
459 | trust = HTTP_TRUST_INVALID; | |
460 | ||
ff82e169 MS |
461 | if (trust == HTTP_TRUST_OK && !cg->expired_certs) |
462 | { | |
463 | time_t curtime; /* Current date/time */ | |
464 | ||
465 | time(&curtime); | |
466 | if (curtime < gnutls_x509_crt_get_activation_time(cert) || | |
467 | curtime > gnutls_x509_crt_get_expiration_time(cert)) | |
468 | trust = HTTP_TRUST_EXPIRED; | |
469 | } | |
470 | ||
471 | if (trust == HTTP_TRUST_OK && !cg->any_root && cupsArrayCount(credentials) == 1) | |
a15960a1 MS |
472 | trust = HTTP_TRUST_INVALID; |
473 | ||
ff82e169 | 474 | gnutls_x509_crt_deinit(cert); |
a15960a1 MS |
475 | |
476 | return (trust); | |
477 | } | |
478 | ||
479 | ||
480 | /* | |
481 | * 'httpCredentialsGetExpiration()' - Return the expiration date of the credentials. | |
482 | * | |
e1f19878 | 483 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
484 | */ |
485 | ||
486 | time_t /* O - Expiration date of credentials */ | |
487 | httpCredentialsGetExpiration( | |
488 | cups_array_t *credentials) /* I - Credentials */ | |
489 | { | |
ff82e169 MS |
490 | gnutls_x509_crt_t cert; /* Certificate */ |
491 | time_t result = 0; /* Result */ | |
492 | ||
493 | ||
494 | cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
495 | if (cert) | |
496 | { | |
bdc8d1ad | 497 | result = gnutls_x509_crt_get_expiration_time(cert); |
ff82e169 MS |
498 | gnutls_x509_crt_deinit(cert); |
499 | } | |
a15960a1 | 500 | |
ff82e169 | 501 | return (result); |
a15960a1 MS |
502 | } |
503 | ||
504 | ||
505 | /* | |
506 | * 'httpCredentialsString()' - Return a string representing the credentials. | |
507 | * | |
e1f19878 | 508 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
509 | */ |
510 | ||
511 | size_t /* O - Total size of credentials string */ | |
512 | httpCredentialsString( | |
513 | cups_array_t *credentials, /* I - Credentials */ | |
514 | char *buffer, /* I - Buffer or @code NULL@ */ | |
515 | size_t bufsize) /* I - Size of buffer */ | |
516 | { | |
ff82e169 MS |
517 | http_credential_t *first; /* First certificate */ |
518 | gnutls_x509_crt_t cert; /* Certificate */ | |
519 | ||
520 | ||
a15960a1 MS |
521 | DEBUG_printf(("httpCredentialsString(credentials=%p, buffer=%p, bufsize=" CUPS_LLFMT ")", credentials, buffer, CUPS_LLCAST bufsize)); |
522 | ||
523 | if (!buffer) | |
524 | return (0); | |
525 | ||
526 | if (buffer && bufsize > 0) | |
527 | *buffer = '\0'; | |
528 | ||
a15960a1 | 529 | if ((first = (http_credential_t *)cupsArrayFirst(credentials)) != NULL && |
ff82e169 | 530 | (cert = http_gnutls_create_credential(first)) != NULL) |
a15960a1 | 531 | { |
a15960a1 | 532 | char name[256]; /* Common name associated with cert */ |
bdc8d1ad | 533 | size_t namelen; /* Length of name */ |
a15960a1 MS |
534 | time_t expiration; /* Expiration date of cert */ |
535 | _cups_md5_state_t md5_state; /* MD5 state */ | |
536 | unsigned char md5_digest[16]; /* MD5 result */ | |
537 | ||
bdc8d1ad MS |
538 | namelen = sizeof(name) - 1; |
539 | if (gnutls_x509_crt_get_dn_by_oid(cert, GNUTLS_OID_X520_COMMON_NAME, 0, 0, name, &namelen) >= 0) | |
540 | name[namelen] = '\0'; | |
541 | else | |
a15960a1 MS |
542 | strlcpy(name, "unknown", sizeof(name)); |
543 | ||
ff82e169 | 544 | expiration = gnutls_x509_crt_get_expiration_time(cert); |
a15960a1 MS |
545 | |
546 | _cupsMD5Init(&md5_state); | |
547 | _cupsMD5Append(&md5_state, first->data, (int)first->datalen); | |
548 | _cupsMD5Finish(&md5_state, md5_digest); | |
549 | ||
550 | 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]); | |
551 | ||
ff82e169 | 552 | gnutls_x509_crt_deinit(cert); |
a15960a1 | 553 | } |
a15960a1 MS |
554 | |
555 | DEBUG_printf(("1httpCredentialsString: Returning \"%s\".", buffer)); | |
556 | ||
557 | return (strlen(buffer)); | |
558 | } | |
559 | ||
560 | ||
561 | /* | |
562 | * 'httpLoadCredentials()' - Load X.509 credentials from a keychain file. | |
563 | * | |
e1f19878 | 564 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
565 | */ |
566 | ||
567 | int /* O - 0 on success, -1 on error */ | |
568 | httpLoadCredentials( | |
569 | const char *path, /* I - Keychain/PKCS#12 path */ | |
570 | cups_array_t **credentials, /* IO - Credentials */ | |
571 | const char *common_name) /* I - Common name for credentials */ | |
572 | { | |
ff82e169 MS |
573 | cups_file_t *fp; /* Certificate file */ |
574 | char filename[1024], /* filename.crt */ | |
575 | temp[1024], /* Temporary string */ | |
576 | line[256]; /* Base64-encoded line */ | |
577 | unsigned char *data = NULL; /* Buffer for cert data */ | |
578 | size_t alloc_data = 0, /* Bytes allocated */ | |
579 | num_data = 0; /* Bytes used */ | |
580 | int decoded; /* Bytes decoded */ | |
581 | ||
582 | ||
583 | if (!credentials || !common_name) | |
584 | return (-1); | |
585 | ||
586 | if (!path) | |
587 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
588 | if (!path) | |
589 | return (-1); | |
590 | ||
26435c51 | 591 | http_gnutls_make_path(filename, sizeof(filename), path, common_name, "crt"); |
ff82e169 MS |
592 | |
593 | if ((fp = cupsFileOpen(filename, "r")) == NULL) | |
594 | return (-1); | |
595 | ||
596 | while (cupsFileGets(fp, line, sizeof(line))) | |
597 | { | |
598 | if (!strcmp(line, "-----BEGIN CERTIFICATE-----")) | |
599 | { | |
600 | if (num_data) | |
601 | { | |
602 | /* | |
603 | * Missing END CERTIFICATE... | |
604 | */ | |
605 | ||
606 | httpFreeCredentials(*credentials); | |
607 | *credentials = NULL; | |
608 | break; | |
609 | } | |
610 | } | |
611 | else if (!strcmp(line, "-----END CERTIFICATE-----")) | |
612 | { | |
613 | if (!num_data) | |
614 | { | |
615 | /* | |
616 | * Missing data... | |
617 | */ | |
a15960a1 | 618 | |
ff82e169 MS |
619 | httpFreeCredentials(*credentials); |
620 | *credentials = NULL; | |
621 | break; | |
622 | } | |
623 | ||
624 | if (!*credentials) | |
625 | *credentials = cupsArrayNew(NULL, NULL); | |
626 | ||
627 | if (httpAddCredential(*credentials, data, num_data)) | |
628 | { | |
629 | httpFreeCredentials(*credentials); | |
630 | *credentials = NULL; | |
631 | break; | |
632 | } | |
633 | ||
634 | num_data = 0; | |
635 | } | |
636 | else | |
637 | { | |
638 | if (alloc_data == 0) | |
639 | { | |
640 | data = malloc(2048); | |
641 | alloc_data = 2048; | |
642 | ||
643 | if (!data) | |
644 | break; | |
645 | } | |
646 | else if ((num_data + strlen(line)) >= alloc_data) | |
647 | { | |
648 | unsigned char *tdata = realloc(data, alloc_data + 1024); | |
649 | /* Expanded buffer */ | |
650 | ||
651 | if (!tdata) | |
652 | { | |
653 | httpFreeCredentials(*credentials); | |
654 | *credentials = NULL; | |
655 | break; | |
656 | } | |
657 | ||
658 | data = tdata; | |
659 | alloc_data += 1024; | |
660 | } | |
661 | ||
662 | decoded = alloc_data - num_data; | |
bdc8d1ad MS |
663 | httpDecode64_2((char *)data + num_data, &decoded, line); |
664 | num_data += (size_t)decoded; | |
ff82e169 MS |
665 | } |
666 | } | |
667 | ||
668 | cupsFileClose(fp); | |
669 | ||
670 | if (num_data) | |
671 | { | |
672 | /* | |
673 | * Missing END CERTIFICATE... | |
674 | */ | |
675 | ||
676 | httpFreeCredentials(*credentials); | |
677 | *credentials = NULL; | |
678 | } | |
679 | ||
680 | if (data) | |
681 | free(data); | |
682 | ||
683 | return (*credentials ? 0 : -1); | |
a15960a1 MS |
684 | } |
685 | ||
686 | ||
687 | /* | |
688 | * 'httpSaveCredentials()' - Save X.509 credentials to a keychain file. | |
689 | * | |
e1f19878 | 690 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
691 | */ |
692 | ||
693 | int /* O - -1 on error, 0 on success */ | |
694 | httpSaveCredentials( | |
695 | const char *path, /* I - Keychain/PKCS#12 path */ | |
696 | cups_array_t *credentials, /* I - Credentials */ | |
697 | const char *common_name) /* I - Common name for credentials */ | |
698 | { | |
ff82e169 MS |
699 | cups_file_t *fp; /* Certificate file */ |
700 | char filename[1024], /* filename.crt */ | |
701 | nfilename[1024],/* filename.crt.N */ | |
702 | temp[1024], /* Temporary string */ | |
bdc8d1ad | 703 | line[256]; /* Base64-encoded line */ |
ff82e169 | 704 | const unsigned char *ptr; /* Pointer into certificate */ |
bdc8d1ad | 705 | ssize_t remaining; /* Bytes left */ |
ff82e169 MS |
706 | http_credential_t *cred; /* Current credential */ |
707 | ||
708 | ||
709 | if (!credentials || !common_name) | |
710 | return (-1); | |
711 | ||
712 | if (!path) | |
713 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
714 | if (!path) | |
715 | return (-1); | |
716 | ||
26435c51 MS |
717 | http_gnutls_make_path(filename, sizeof(filename), path, common_name, "crt"); |
718 | snprintf(nfilename, sizeof(nfilename), "%s.N", filename); | |
ff82e169 MS |
719 | |
720 | if ((fp = cupsFileOpen(nfilename, "w")) == NULL) | |
721 | return (-1); | |
722 | ||
723 | fchmod(cupsFileNumber(fp), 0600); | |
724 | ||
725 | for (cred = (http_credential_t *)cupsArrayFirst(credentials); | |
726 | cred; | |
727 | cred = (http_credential_t *)cupsArrayNext(credentials)) | |
728 | { | |
729 | cupsFilePuts(fp, "-----BEGIN CERTIFICATE-----\n"); | |
bdc8d1ad | 730 | for (ptr = cred->data, remaining = (ssize_t)cred->datalen; remaining > 0; remaining -= 45, ptr += 45) |
ff82e169 | 731 | { |
bdc8d1ad | 732 | httpEncode64_2(line, sizeof(line), (char *)ptr, remaining > 45 ? 45 : remaining); |
ff82e169 MS |
733 | cupsFilePrintf(fp, "%s\n", line); |
734 | } | |
735 | cupsFilePuts(fp, "-----END CERTIFICATE-----\n"); | |
736 | } | |
737 | ||
738 | cupsFileClose(fp); | |
739 | ||
740 | return (rename(nfilename, filename)); | |
741 | } | |
742 | ||
743 | ||
744 | /* | |
745 | * 'http_gnutls_create_credential()' - Create a single credential in the internal format. | |
746 | */ | |
747 | ||
748 | static gnutls_x509_crt_t /* O - Certificate */ | |
749 | http_gnutls_create_credential( | |
750 | http_credential_t *credential) /* I - Credential */ | |
751 | { | |
bdc8d1ad MS |
752 | int result; /* Result from GNU TLS */ |
753 | gnutls_x509_crt_t cert; /* Certificate */ | |
ff82e169 MS |
754 | gnutls_datum_t datum; /* Data record */ |
755 | ||
756 | ||
bdc8d1ad MS |
757 | DEBUG_printf(("3http_gnutls_create_credential(credential=%p)", credential)); |
758 | ||
ff82e169 MS |
759 | if (!credential) |
760 | return (NULL); | |
761 | ||
bdc8d1ad MS |
762 | if ((result = gnutls_x509_crt_init(&cert)) < 0) |
763 | { | |
764 | DEBUG_printf(("4http_gnutls_create_credential: init error: %s", gnutls_strerror(result))); | |
ff82e169 | 765 | return (NULL); |
bdc8d1ad | 766 | } |
ff82e169 | 767 | |
bdc8d1ad MS |
768 | datum.data = credential->data; |
769 | datum.size = credential->datalen; | |
ff82e169 | 770 | |
bdc8d1ad | 771 | if ((result = gnutls_x509_crt_import(cert, &datum, GNUTLS_X509_FMT_DER)) < 0) |
ff82e169 | 772 | { |
bdc8d1ad MS |
773 | DEBUG_printf(("4http_gnutls_create_credential: import error: %s", gnutls_strerror(result))); |
774 | ||
ff82e169 MS |
775 | gnutls_x509_crt_deinit(cert); |
776 | return (NULL); | |
777 | } | |
a15960a1 | 778 | |
ff82e169 | 779 | return (cert); |
a15960a1 MS |
780 | } |
781 | ||
782 | ||
d0facf48 MS |
783 | /* |
784 | * 'http_gnutls_default_path()' - Get the default credential store path. | |
785 | */ | |
786 | ||
787 | static const char * /* O - Path or NULL on error */ | |
788 | http_gnutls_default_path(char *buffer,/* I - Path buffer */ | |
789 | size_t bufsize)/* I - Size of path buffer */ | |
790 | { | |
791 | const char *home = getenv("HOME"); /* HOME environment variable */ | |
792 | ||
793 | ||
794 | if (getuid() && home) | |
795 | { | |
796 | snprintf(buffer, bufsize, "%s/.cups", home); | |
797 | if (access(buffer, 0)) | |
798 | { | |
799 | DEBUG_printf(("1http_gnutls_default_path: Making directory \"%s\".", buffer)); | |
800 | if (mkdir(buffer, 0700)) | |
801 | { | |
802 | DEBUG_printf(("1http_gnutls_default_path: Failed to make directory: %s", strerror(errno))); | |
803 | return (NULL); | |
804 | } | |
805 | } | |
806 | ||
807 | snprintf(buffer, bufsize, "%s/.cups/ssl", home); | |
808 | if (access(buffer, 0)) | |
809 | { | |
810 | DEBUG_printf(("1http_gnutls_default_path: Making directory \"%s\".", buffer)); | |
811 | if (mkdir(buffer, 0700)) | |
812 | { | |
813 | DEBUG_printf(("1http_gnutls_default_path: Failed to make directory: %s", strerror(errno))); | |
814 | return (NULL); | |
815 | } | |
816 | } | |
817 | } | |
818 | else | |
819 | strlcpy(buffer, CUPS_SERVERROOT "/ssl", bufsize); | |
820 | ||
821 | DEBUG_printf(("1http_gnutls_default_path: Using default path \"%s\".", buffer)); | |
822 | ||
823 | return (buffer); | |
824 | } | |
825 | ||
826 | ||
26435c51 MS |
827 | /* |
828 | * 'http_gnutls_make_path()' - Format a filename for a certificate or key file. | |
829 | */ | |
830 | ||
831 | static const char * /* O - Filename */ | |
832 | http_gnutls_make_path( | |
833 | char *buffer, /* I - Filename buffer */ | |
834 | size_t bufsize, /* I - Size of buffer */ | |
835 | const char *dirname, /* I - Directory */ | |
836 | const char *filename, /* I - Filename (usually hostname) */ | |
837 | const char *ext) /* I - Extension */ | |
838 | { | |
839 | char *bufptr, /* Pointer into buffer */ | |
840 | *bufend = buffer + bufsize - 1; /* End of buffer */ | |
841 | ||
842 | ||
843 | snprintf(buffer, bufsize, "%s/", dirname); | |
844 | bufptr = buffer + strlen(buffer); | |
845 | ||
846 | while (*filename && bufptr < bufend) | |
847 | { | |
848 | if (_cups_isalnum(*filename) || *filename == '-' || *filename == '.') | |
849 | *bufptr++ = *filename; | |
850 | else | |
851 | *bufptr++ = '_'; | |
852 | ||
853 | filename ++; | |
854 | } | |
855 | ||
856 | if (bufptr < bufend) | |
857 | *bufptr++ = '.'; | |
858 | ||
a2751f30 | 859 | strlcpy(bufptr, ext, (size_t)(bufend - bufptr + 1)); |
26435c51 MS |
860 | |
861 | return (buffer); | |
862 | } | |
863 | ||
864 | ||
dd332638 MS |
865 | /* |
866 | * 'http_gnutls_read()' - Read function for the GNU TLS library. | |
867 | */ | |
868 | ||
869 | static ssize_t /* O - Number of bytes read or -1 on error */ | |
870 | http_gnutls_read( | |
871 | gnutls_transport_ptr_t ptr, /* I - Connection to server */ | |
872 | void *data, /* I - Buffer */ | |
873 | size_t length) /* I - Number of bytes to read */ | |
874 | { | |
875 | http_t *http; /* HTTP connection */ | |
876 | ssize_t bytes; /* Bytes read */ | |
877 | ||
878 | ||
879 | DEBUG_printf(("6http_gnutls_read(ptr=%p, data=%p, length=%d)", ptr, data, (int)length)); | |
880 | ||
881 | http = (http_t *)ptr; | |
882 | ||
883 | if (!http->blocking) | |
884 | { | |
885 | /* | |
886 | * Make sure we have data before we read... | |
887 | */ | |
888 | ||
889 | while (!_httpWait(http, http->wait_value, 0)) | |
890 | { | |
891 | if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) | |
892 | continue; | |
893 | ||
894 | http->error = ETIMEDOUT; | |
895 | return (-1); | |
896 | } | |
897 | } | |
898 | ||
899 | bytes = recv(http->fd, data, length, 0); | |
900 | DEBUG_printf(("6http_gnutls_read: bytes=%d", (int)bytes)); | |
901 | return (bytes); | |
902 | } | |
903 | ||
904 | ||
905 | /* | |
906 | * 'http_gnutls_write()' - Write function for the GNU TLS library. | |
907 | */ | |
908 | ||
909 | static ssize_t /* O - Number of bytes written or -1 on error */ | |
910 | http_gnutls_write( | |
911 | gnutls_transport_ptr_t ptr, /* I - Connection to server */ | |
912 | const void *data, /* I - Data buffer */ | |
913 | size_t length) /* I - Number of bytes to write */ | |
914 | { | |
915 | ssize_t bytes; /* Bytes written */ | |
916 | ||
917 | ||
918 | DEBUG_printf(("6http_gnutls_write(ptr=%p, data=%p, length=%d)", ptr, data, | |
919 | (int)length)); | |
dd332638 MS |
920 | bytes = send(((http_t *)ptr)->fd, data, length, 0); |
921 | DEBUG_printf(("http_gnutls_write: bytes=%d", (int)bytes)); | |
922 | ||
923 | return (bytes); | |
924 | } | |
2c85b752 MS |
925 | |
926 | ||
927 | /* | |
172bdf5d | 928 | * '_httpTLSInitialize()' - Initialize the TLS stack. |
2c85b752 MS |
929 | */ |
930 | ||
172bdf5d MS |
931 | void |
932 | _httpTLSInitialize(void) | |
2c85b752 | 933 | { |
2c85b752 MS |
934 | /* |
935 | * Initialize GNU TLS... | |
936 | */ | |
937 | ||
938 | gnutls_global_init(); | |
dd332638 | 939 | } |
2c85b752 | 940 | |
2c85b752 | 941 | |
dd332638 | 942 | /* |
172bdf5d | 943 | * '_httpTLSPending()' - Return the number of pending TLS-encrypted bytes. |
dd332638 | 944 | */ |
2c85b752 | 945 | |
172bdf5d MS |
946 | size_t /* O - Bytes available */ |
947 | _httpTLSPending(http_t *http) /* I - HTTP connection */ | |
dd332638 MS |
948 | { |
949 | return (gnutls_record_check_pending(http->tls)); | |
2c85b752 MS |
950 | } |
951 | ||
952 | ||
2c85b752 | 953 | /* |
172bdf5d | 954 | * '_httpTLSRead()' - Read from a SSL/TLS connection. |
2c85b752 MS |
955 | */ |
956 | ||
172bdf5d MS |
957 | int /* O - Bytes read */ |
958 | _httpTLSRead(http_t *http, /* I - Connection to server */ | |
959 | char *buf, /* I - Buffer to store data */ | |
960 | int len) /* I - Length of buffer */ | |
2c85b752 | 961 | { |
2c85b752 MS |
962 | ssize_t result; /* Return value */ |
963 | ||
964 | ||
07623986 | 965 | result = gnutls_record_recv(http->tls, buf, (size_t)len); |
2c85b752 MS |
966 | |
967 | if (result < 0 && !errno) | |
968 | { | |
969 | /* | |
970 | * Convert GNU TLS error to errno value... | |
971 | */ | |
972 | ||
973 | switch (result) | |
974 | { | |
975 | case GNUTLS_E_INTERRUPTED : | |
976 | errno = EINTR; | |
977 | break; | |
978 | ||
979 | case GNUTLS_E_AGAIN : | |
980 | errno = EAGAIN; | |
981 | break; | |
982 | ||
983 | default : | |
984 | errno = EPIPE; | |
985 | break; | |
986 | } | |
987 | ||
988 | result = -1; | |
989 | } | |
990 | ||
991 | return ((int)result); | |
dd332638 | 992 | } |
2c85b752 MS |
993 | |
994 | ||
dd332638 | 995 | /* |
172bdf5d | 996 | * '_httpTLSSetCredentials()' - Set the TLS credentials. |
dd332638 | 997 | */ |
2c85b752 | 998 | |
172bdf5d MS |
999 | int /* O - Status of connection */ |
1000 | _httpTLSSetCredentials(http_t *http) /* I - Connection to server */ | |
dd332638 MS |
1001 | { |
1002 | (void)http; | |
2c85b752 | 1003 | |
dd332638 | 1004 | return (0); |
2c85b752 | 1005 | } |
2c85b752 MS |
1006 | |
1007 | ||
63aefcd5 MS |
1008 | /* |
1009 | * '_httpTLSSetOptions()' - Set TLS protocol and cipher suite options. | |
1010 | */ | |
1011 | ||
1012 | void | |
1013 | _httpTLSSetOptions(int options) /* I - Options */ | |
1014 | { | |
1015 | tls_options = options; | |
1016 | } | |
1017 | ||
1018 | ||
2c85b752 | 1019 | /* |
172bdf5d | 1020 | * '_httpTLSStart()' - Set up SSL/TLS support on a connection. |
2c85b752 MS |
1021 | */ |
1022 | ||
172bdf5d MS |
1023 | int /* O - 0 on success, -1 on failure */ |
1024 | _httpTLSStart(http_t *http) /* I - Connection to server */ | |
2c85b752 MS |
1025 | { |
1026 | char hostname[256], /* Hostname */ | |
1027 | *hostptr; /* Pointer into hostname */ | |
2c85b752 | 1028 | int status; /* Status of handshake */ |
172bdf5d | 1029 | gnutls_certificate_credentials_t *credentials; |
2c85b752 | 1030 | /* TLS credentials */ |
2c85b752 MS |
1031 | |
1032 | ||
172bdf5d | 1033 | DEBUG_printf(("7_httpTLSStart(http=%p)", http)); |
2c85b752 | 1034 | |
172bdf5d | 1035 | if (http->mode == _HTTP_MODE_SERVER && !tls_keypath) |
2c85b752 | 1036 | { |
172bdf5d MS |
1037 | DEBUG_puts("4_httpTLSStart: cupsSetServerCredentials not called."); |
1038 | http->error = errno = EINVAL; | |
1039 | http->status = HTTP_STATUS_ERROR; | |
1040 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Server credentials not set."), 1); | |
2c85b752 | 1041 | |
172bdf5d | 1042 | return (-1); |
2c85b752 MS |
1043 | } |
1044 | ||
172bdf5d MS |
1045 | credentials = (gnutls_certificate_credentials_t *) |
1046 | malloc(sizeof(gnutls_certificate_credentials_t)); | |
2c85b752 MS |
1047 | if (credentials == NULL) |
1048 | { | |
172bdf5d | 1049 | DEBUG_printf(("8_httpStartTLS: Unable to allocate credentials: %s", |
2c85b752 MS |
1050 | strerror(errno))); |
1051 | http->error = errno; | |
1052 | http->status = HTTP_STATUS_ERROR; | |
1053 | _cupsSetHTTPError(HTTP_STATUS_ERROR); | |
1054 | ||
1055 | return (-1); | |
1056 | } | |
1057 | ||
1058 | gnutls_certificate_allocate_credentials(credentials); | |
d0facf48 | 1059 | status = gnutls_init(&http->tls, http->mode == _HTTP_MODE_CLIENT ? GNUTLS_CLIENT : GNUTLS_SERVER); |
d0facf48 | 1060 | if (!status) |
005f7f1f | 1061 | status = gnutls_set_default_priority(http->tls); |
d0facf48 MS |
1062 | |
1063 | if (status) | |
1064 | { | |
1065 | http->error = EIO; | |
1066 | http->status = HTTP_STATUS_ERROR; | |
1067 | ||
1068 | DEBUG_printf(("4_httpTLSStart: Unable to initialize common TLS parameters: %s", gnutls_strerror(status))); | |
1069 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1070 | ||
1071 | gnutls_deinit(http->tls); | |
1072 | gnutls_certificate_free_credentials(*credentials); | |
1073 | free(credentials); | |
1074 | http->tls = NULL; | |
1075 | ||
1076 | return (-1); | |
1077 | } | |
2c85b752 | 1078 | |
f394e0f7 | 1079 | if (http->mode == _HTTP_MODE_CLIENT) |
172bdf5d MS |
1080 | { |
1081 | /* | |
1082 | * Client: get the hostname to use for TLS... | |
1083 | */ | |
1084 | ||
1085 | if (httpAddrLocalhost(http->hostaddr)) | |
1086 | { | |
1087 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
1088 | } | |
1089 | else | |
1090 | { | |
1091 | /* | |
1092 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
1093 | */ | |
1094 | ||
1095 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
1096 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
1097 | *hostptr == '.') | |
1098 | *hostptr = '\0'; | |
1099 | } | |
1100 | ||
d0facf48 | 1101 | status = gnutls_server_name_set(http->tls, GNUTLS_NAME_DNS, hostname, strlen(hostname)); |
172bdf5d MS |
1102 | } |
1103 | else | |
1104 | { | |
1105 | /* | |
1106 | * Server: get certificate and private key... | |
1107 | */ | |
1108 | ||
1109 | char crtfile[1024], /* Certificate file */ | |
1110 | keyfile[1024]; /* Private key file */ | |
1111 | int have_creds = 0; /* Have credentials? */ | |
1112 | ||
172bdf5d MS |
1113 | if (http->fields[HTTP_FIELD_HOST][0]) |
1114 | { | |
1115 | /* | |
1116 | * Use hostname for TLS upgrade... | |
1117 | */ | |
1118 | ||
1119 | strlcpy(hostname, http->fields[HTTP_FIELD_HOST], sizeof(hostname)); | |
1120 | } | |
1121 | else | |
1122 | { | |
1123 | /* | |
1124 | * Resolve hostname from connection address... | |
1125 | */ | |
1126 | ||
1127 | http_addr_t addr; /* Connection address */ | |
1128 | socklen_t addrlen; /* Length of address */ | |
1129 | ||
1130 | addrlen = sizeof(addr); | |
1131 | if (getsockname(http->fd, (struct sockaddr *)&addr, &addrlen)) | |
1132 | { | |
1133 | DEBUG_printf(("4_httpTLSStart: Unable to get socket address: %s", strerror(errno))); | |
1134 | hostname[0] = '\0'; | |
1135 | } | |
1136 | else if (httpAddrLocalhost(&addr)) | |
1137 | hostname[0] = '\0'; | |
1138 | else | |
1139 | { | |
1140 | httpAddrLookup(&addr, hostname, sizeof(hostname)); | |
1141 | DEBUG_printf(("4_httpTLSStart: Resolved socket address to \"%s\".", hostname)); | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | if (isdigit(hostname[0] & 255) || hostname[0] == '[') | |
1146 | hostname[0] = '\0'; /* Don't allow numeric addresses */ | |
1147 | ||
1148 | if (hostname[0]) | |
1149 | { | |
26435c51 MS |
1150 | http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, hostname, "crt"); |
1151 | http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, hostname, "key"); | |
172bdf5d MS |
1152 | |
1153 | have_creds = !access(crtfile, 0) && !access(keyfile, 0); | |
1154 | } | |
1155 | else if (tls_common_name) | |
1156 | { | |
26435c51 MS |
1157 | http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, tls_common_name, "crt"); |
1158 | http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, tls_common_name, "key"); | |
172bdf5d MS |
1159 | |
1160 | have_creds = !access(crtfile, 0) && !access(keyfile, 0); | |
1161 | } | |
1162 | ||
1163 | if (!have_creds && tls_auto_create && (hostname[0] || tls_common_name)) | |
1164 | { | |
1165 | DEBUG_printf(("4_httpTLSStart: Auto-create credentials for \"%s\".", hostname[0] ? hostname : tls_common_name)); | |
1166 | ||
1167 | if (!cupsMakeServerCredentials(tls_keypath, hostname[0] ? hostname : tls_common_name, 0, NULL, time(NULL) + 365 * 86400)) | |
1168 | { | |
1169 | DEBUG_puts("4_httpTLSStart: cupsMakeServerCredentials failed."); | |
1170 | http->error = errno = EINVAL; | |
1171 | http->status = HTTP_STATUS_ERROR; | |
1172 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unable to create server credentials."), 1); | |
1173 | ||
1174 | return (-1); | |
1175 | } | |
1176 | } | |
1177 | ||
d0facf48 MS |
1178 | DEBUG_printf(("4_httpTLSStart: Using certificate \"%s\" and private key \"%s\".", crtfile, keyfile)); |
1179 | ||
1180 | status = gnutls_certificate_set_x509_key_file(*credentials, crtfile, keyfile, GNUTLS_X509_FMT_PEM); | |
1181 | } | |
1182 | ||
1183 | if (!status) | |
1184 | status = gnutls_credentials_set(http->tls, GNUTLS_CRD_CERTIFICATE, *credentials); | |
1185 | ||
1186 | if (status) | |
1187 | { | |
1188 | http->error = EIO; | |
1189 | http->status = HTTP_STATUS_ERROR; | |
1190 | ||
1191 | DEBUG_printf(("4_httpTLSStart: Unable to complete client/server setup: %s", gnutls_strerror(status))); | |
1192 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1193 | ||
1194 | gnutls_deinit(http->tls); | |
1195 | gnutls_certificate_free_credentials(*credentials); | |
1196 | free(credentials); | |
1197 | http->tls = NULL; | |
1198 | ||
1199 | return (-1); | |
172bdf5d MS |
1200 | } |
1201 | ||
19ba6878 | 1202 | #ifdef HAVE_GNUTLS_PRIORITY_SET_DIRECT |
63aefcd5 | 1203 | if (!tls_options) |
ef146940 | 1204 | gnutls_priority_set_direct(http->tls, "NORMAL:-ARCFOUR-128:+VERS-TLS-ALL:-VERS-SSL3.0", NULL); |
63aefcd5 MS |
1205 | else if ((tls_options & _HTTP_TLS_ALLOW_SSL3) && (tls_options & _HTTP_TLS_ALLOW_RC4)) |
1206 | gnutls_priority_set_direct(http->tls, "NORMAL", NULL); | |
1207 | else if (tls_options & _HTTP_TLS_ALLOW_SSL3) | |
ef146940 | 1208 | gnutls_priority_set_direct(http->tls, "NORMAL:-ARCFOUR-128:+VERS-TLS-ALL", NULL); |
63aefcd5 | 1209 | else |
ef146940 | 1210 | gnutls_priority_set_direct(http->tls, "NORMAL:+VERS-TLS-ALL:-VERS-SSL3.0", NULL); |
63aefcd5 | 1211 | |
19ba6878 MS |
1212 | #else |
1213 | gnutls_priority_t priority; /* Priority */ | |
1214 | ||
1215 | if (!tls_options) | |
ef146940 | 1216 | gnutls_priority_init(&priority, "NORMAL:-ARCFOUR-128:+VERS-TLS-ALL:-VERS-SSL3.0", NULL); |
19ba6878 MS |
1217 | else if ((tls_options & _HTTP_TLS_ALLOW_SSL3) && (tls_options & _HTTP_TLS_ALLOW_RC4)) |
1218 | gnutls_priority_init(&priority, "NORMAL", NULL); | |
1219 | else if (tls_options & _HTTP_TLS_ALLOW_SSL3) | |
ef146940 | 1220 | gnutls_priority_init(&priority, "NORMAL:-ARCFOUR-128:+VERS-TLS-ALL", NULL); |
19ba6878 | 1221 | else |
ef146940 | 1222 | gnutls_priority_init(&priority, "NORMAL:+VERS-TLS-ALL:-VERS-SSL3.0", NULL); |
19ba6878 MS |
1223 | |
1224 | gnutls_priority_set(http->tls, priority); | |
1225 | gnutls_priority_deinit(priority); | |
1226 | #endif /* HAVE_GNUTLS_PRIORITY_SET_DIRECT */ | |
1227 | ||
d0facf48 MS |
1228 | gnutls_transport_set_ptr(http->tls, (gnutls_transport_ptr_t)http); |
1229 | gnutls_transport_set_pull_function(http->tls, http_gnutls_read); | |
e7312eb4 | 1230 | #ifdef HAVE_GNUTLS_TRANSPORT_SET_PULL_TIMEOUT_FUNCTION |
d0facf48 | 1231 | gnutls_transport_set_pull_timeout_function(http->tls, (gnutls_pull_timeout_func)httpWait); |
e7312eb4 | 1232 | #endif /* HAVE_GNUTLS_TRANSPORT_SET_PULL_TIMEOUT_FUNCTION */ |
d0facf48 MS |
1233 | gnutls_transport_set_push_function(http->tls, http_gnutls_write); |
1234 | ||
2c85b752 MS |
1235 | while ((status = gnutls_handshake(http->tls)) != GNUTLS_E_SUCCESS) |
1236 | { | |
d0facf48 | 1237 | DEBUG_printf(("5_httpStartTLS: gnutls_handshake returned %d (%s)", |
2c85b752 MS |
1238 | status, gnutls_strerror(status))); |
1239 | ||
1240 | if (gnutls_error_is_fatal(status)) | |
1241 | { | |
1242 | http->error = EIO; | |
1243 | http->status = HTTP_STATUS_ERROR; | |
1244 | ||
1245 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1246 | ||
1247 | gnutls_deinit(http->tls); | |
1248 | gnutls_certificate_free_credentials(*credentials); | |
1249 | free(credentials); | |
1250 | http->tls = NULL; | |
1251 | ||
1252 | return (-1); | |
1253 | } | |
1254 | } | |
1255 | ||
1256 | http->tls_credentials = credentials; | |
1257 | ||
2c85b752 MS |
1258 | return (0); |
1259 | } | |
1260 | ||
1261 | ||
1262 | /* | |
172bdf5d | 1263 | * '_httpTLSStop()' - Shut down SSL/TLS on a connection. |
2c85b752 MS |
1264 | */ |
1265 | ||
172bdf5d MS |
1266 | void |
1267 | _httpTLSStop(http_t *http) /* I - Connection to server */ | |
2c85b752 | 1268 | { |
172bdf5d MS |
1269 | int error; /* Error code */ |
1270 | ||
2c85b752 | 1271 | |
f394e0f7 | 1272 | error = gnutls_bye(http->tls, http->mode == _HTTP_MODE_CLIENT ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR); |
172bdf5d | 1273 | if (error != GNUTLS_E_SUCCESS) |
f394e0f7 | 1274 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(errno), 0); |
2c85b752 | 1275 | |
2c85b752 | 1276 | gnutls_deinit(http->tls); |
172bdf5d MS |
1277 | http->tls = NULL; |
1278 | ||
d0facf48 MS |
1279 | if (http->tls_credentials) |
1280 | { | |
1281 | gnutls_certificate_free_credentials(*(http->tls_credentials)); | |
1282 | free(http->tls_credentials); | |
1283 | http->tls_credentials = NULL; | |
1284 | } | |
2c85b752 | 1285 | } |
2c85b752 MS |
1286 | |
1287 | ||
2c85b752 | 1288 | /* |
172bdf5d | 1289 | * '_httpTLSWrite()' - Write to a SSL/TLS connection. |
2c85b752 MS |
1290 | */ |
1291 | ||
172bdf5d MS |
1292 | int /* O - Bytes written */ |
1293 | _httpTLSWrite(http_t *http, /* I - Connection to server */ | |
1294 | const char *buf, /* I - Buffer holding data */ | |
1295 | int len) /* I - Length of buffer */ | |
2c85b752 MS |
1296 | { |
1297 | ssize_t result; /* Return value */ | |
1298 | ||
1299 | ||
1300 | DEBUG_printf(("2http_write_ssl(http=%p, buf=%p, len=%d)", http, buf, len)); | |
1301 | ||
07623986 | 1302 | result = gnutls_record_send(http->tls, buf, (size_t)len); |
2c85b752 MS |
1303 | |
1304 | if (result < 0 && !errno) | |
1305 | { | |
1306 | /* | |
1307 | * Convert GNU TLS error to errno value... | |
1308 | */ | |
1309 | ||
1310 | switch (result) | |
1311 | { | |
1312 | case GNUTLS_E_INTERRUPTED : | |
1313 | errno = EINTR; | |
1314 | break; | |
1315 | ||
1316 | case GNUTLS_E_AGAIN : | |
1317 | errno = EAGAIN; | |
1318 | break; | |
1319 | ||
1320 | default : | |
1321 | errno = EPIPE; | |
1322 | break; | |
1323 | } | |
1324 | ||
1325 | result = -1; | |
1326 | } | |
1327 | ||
2c85b752 MS |
1328 | DEBUG_printf(("3http_write_ssl: Returning %d.", (int)result)); |
1329 | ||
1330 | return ((int)result); | |
1331 | } | |
2c85b752 MS |
1332 | |
1333 | ||
2c85b752 MS |
1334 | /* |
1335 | * End of "$Id$". | |
1336 | */ |