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Commit | Line | Data |
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2c85b752 | 1 | /* |
2c85b752 MS |
2 | * TLS support code for CUPS using GNU TLS. |
3 | * | |
ef146940 | 4 | * Copyright 2007-2015 by Apple Inc. |
2c85b752 MS |
5 | * Copyright 1997-2007 by Easy Software Products, all rights reserved. |
6 | * | |
7 | * These coded instructions, statements, and computer programs are the | |
8 | * property of Apple Inc. and are protected by Federal copyright | |
9 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
10 | * which should have been included with this file. If this file is | |
11 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
12 | * | |
13 | * This file is subject to the Apple OS-Developed Software exception. | |
14 | */ | |
15 | ||
ebb24a07 | 16 | /**** This file is included from tls.c ****/ |
2c85b752 | 17 | |
d0facf48 MS |
18 | /* |
19 | * Include necessary headers... | |
20 | */ | |
21 | ||
22 | #include <sys/stat.h> | |
23 | ||
24 | ||
07623986 MS |
25 | /* |
26 | * Local globals... | |
27 | */ | |
28 | ||
29 | static int tls_auto_create = 0; | |
30 | /* Auto-create self-signed certs? */ | |
31 | static char *tls_common_name = NULL; | |
32 | /* Default common name */ | |
33 | static char *tls_keypath = NULL; | |
34 | /* Server cert keychain path */ | |
35 | static _cups_mutex_t tls_mutex = _CUPS_MUTEX_INITIALIZER; | |
36 | /* Mutex for keychain/certs */ | |
b37d45d9 | 37 | static int tls_options = -1;/* Options for TLS connections */ |
07623986 MS |
38 | |
39 | ||
2c85b752 MS |
40 | /* |
41 | * Local functions... | |
42 | */ | |
43 | ||
ff82e169 | 44 | static gnutls_x509_crt_t http_gnutls_create_credential(http_credential_t *credential); |
d0facf48 | 45 | static const char *http_gnutls_default_path(char *buffer, size_t bufsize); |
a2751f30 | 46 | static const char *http_gnutls_make_path(char *buffer, size_t bufsize, const char *dirname, const char *filename, const char *ext); |
d0facf48 MS |
47 | static ssize_t http_gnutls_read(gnutls_transport_ptr_t ptr, void *data, size_t length); |
48 | static ssize_t http_gnutls_write(gnutls_transport_ptr_t ptr, const void *data, size_t length); | |
dd332638 MS |
49 | |
50 | ||
07623986 MS |
51 | /* |
52 | * 'cupsMakeServerCredentials()' - Make a self-signed certificate and private key pair. | |
53 | * | |
e1f19878 | 54 | * @since CUPS 2.0/OS 10.10@ |
07623986 MS |
55 | */ |
56 | ||
57 | int /* O - 1 on success, 0 on failure */ | |
58 | cupsMakeServerCredentials( | |
59 | const char *path, /* I - Path to keychain/directory */ | |
60 | const char *common_name, /* I - Common name */ | |
61 | int num_alt_names, /* I - Number of subject alternate names */ | |
62 | const char **alt_names, /* I - Subject Alternate Names */ | |
63 | time_t expiration_date) /* I - Expiration date */ | |
64 | { | |
f394e0f7 MS |
65 | gnutls_x509_crt_t crt; /* Self-signed certificate */ |
66 | gnutls_x509_privkey_t key; /* Encryption private key */ | |
67 | char temp[1024], /* Temporary directory name */ | |
68 | crtfile[1024], /* Certificate filename */ | |
172bdf5d MS |
69 | keyfile[1024]; /* Private key filename */ |
70 | cups_lang_t *language; /* Default language info */ | |
71 | cups_file_t *fp; /* Key/cert file */ | |
72 | unsigned char buffer[8192]; /* Buffer for x509 data */ | |
73 | size_t bytes; /* Number of bytes of data */ | |
74 | unsigned char serial[4]; /* Serial number buffer */ | |
75 | time_t curtime; /* Current time */ | |
76 | int result; /* Result of GNU TLS calls */ | |
07623986 | 77 | |
172bdf5d MS |
78 | |
79 | DEBUG_printf(("cupsMakeServerCredentials(path=\"%s\", common_name=\"%s\", num_alt_names=%d, alt_names=%p, expiration_date=%d)", path, common_name, num_alt_names, alt_names, (int)expiration_date)); | |
80 | ||
81 | /* | |
82 | * Filenames... | |
83 | */ | |
84 | ||
85 | if (!path) | |
d0facf48 | 86 | path = http_gnutls_default_path(temp, sizeof(temp)); |
172bdf5d | 87 | |
d0facf48 MS |
88 | if (!path || !common_name) |
89 | { | |
90 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0); | |
91 | return (0); | |
172bdf5d | 92 | } |
26435c51 MS |
93 | |
94 | http_gnutls_make_path(crtfile, sizeof(crtfile), path, common_name, "crt"); | |
95 | http_gnutls_make_path(keyfile, sizeof(keyfile), path, common_name, "key"); | |
172bdf5d MS |
96 | |
97 | /* | |
98 | * Create the encryption key... | |
99 | */ | |
100 | ||
d0facf48 MS |
101 | DEBUG_puts("1cupsMakeServerCredentials: Creating key pair."); |
102 | ||
172bdf5d MS |
103 | gnutls_x509_privkey_init(&key); |
104 | gnutls_x509_privkey_generate(key, GNUTLS_PK_RSA, 2048, 0); | |
105 | ||
d0facf48 MS |
106 | DEBUG_puts("1cupsMakeServerCredentials: Key pair created."); |
107 | ||
172bdf5d MS |
108 | /* |
109 | * Save it... | |
110 | */ | |
111 | ||
112 | bytes = sizeof(buffer); | |
113 | ||
d0facf48 | 114 | if ((result = gnutls_x509_privkey_export(key, GNUTLS_X509_FMT_PEM, buffer, &bytes)) < 0) |
172bdf5d | 115 | { |
d0facf48 | 116 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to export private key: %s", gnutls_strerror(result))); |
172bdf5d MS |
117 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(result), 0); |
118 | gnutls_x509_privkey_deinit(key); | |
119 | return (0); | |
120 | } | |
121 | else if ((fp = cupsFileOpen(keyfile, "w")) != NULL) | |
122 | { | |
d0facf48 | 123 | DEBUG_printf(("1cupsMakeServerCredentials: Writing private key to \"%s\".", keyfile)); |
172bdf5d MS |
124 | cupsFileWrite(fp, (char *)buffer, bytes); |
125 | cupsFileClose(fp); | |
126 | } | |
127 | else | |
128 | { | |
d0facf48 | 129 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to create private key file \"%s\": %s", keyfile, strerror(errno))); |
172bdf5d MS |
130 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
131 | gnutls_x509_privkey_deinit(key); | |
132 | return (0); | |
133 | } | |
134 | ||
135 | /* | |
136 | * Create the self-signed certificate... | |
137 | */ | |
138 | ||
d0facf48 | 139 | DEBUG_puts("1cupsMakeServerCredentials: Generating self-signed X.509 certificate."); |
172bdf5d MS |
140 | |
141 | language = cupsLangDefault(); | |
142 | curtime = time(NULL); | |
143 | serial[0] = curtime >> 24; | |
144 | serial[1] = curtime >> 16; | |
145 | serial[2] = curtime >> 8; | |
146 | serial[3] = curtime; | |
147 | ||
148 | gnutls_x509_crt_init(&crt); | |
149 | if (strlen(language->language) == 5) | |
150 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0, | |
151 | language->language + 3, 2); | |
152 | else | |
153 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0, | |
154 | "US", 2); | |
155 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0, | |
156 | common_name, strlen(common_name)); | |
157 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATION_NAME, 0, | |
158 | common_name, strlen(common_name)); | |
159 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATIONAL_UNIT_NAME, | |
160 | 0, "Unknown", 7); | |
161 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_STATE_OR_PROVINCE_NAME, 0, | |
162 | "Unknown", 7); | |
163 | gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_LOCALITY_NAME, 0, | |
164 | "Unknown", 7); | |
165 | /* gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_PKCS9_EMAIL, 0, | |
166 | ServerAdmin, strlen(ServerAdmin));*/ | |
167 | gnutls_x509_crt_set_key(crt, key); | |
168 | gnutls_x509_crt_set_serial(crt, serial, sizeof(serial)); | |
169 | gnutls_x509_crt_set_activation_time(crt, curtime); | |
170 | gnutls_x509_crt_set_expiration_time(crt, curtime + 10 * 365 * 86400); | |
171 | gnutls_x509_crt_set_ca_status(crt, 0); | |
172 | if (num_alt_names > 0) | |
173 | gnutls_x509_crt_set_subject_alternative_name(crt, GNUTLS_SAN_DNSNAME, alt_names[0]); | |
174 | gnutls_x509_crt_set_key_purpose_oid(crt, GNUTLS_KP_TLS_WWW_SERVER, 0); | |
175 | gnutls_x509_crt_set_key_usage(crt, GNUTLS_KEY_KEY_ENCIPHERMENT); | |
176 | gnutls_x509_crt_set_version(crt, 3); | |
177 | ||
178 | bytes = sizeof(buffer); | |
179 | if (gnutls_x509_crt_get_key_id(crt, 0, buffer, &bytes) >= 0) | |
180 | gnutls_x509_crt_set_subject_key_id(crt, buffer, bytes); | |
181 | ||
182 | gnutls_x509_crt_sign(crt, crt, key); | |
183 | ||
184 | /* | |
185 | * Save it... | |
186 | */ | |
187 | ||
188 | bytes = sizeof(buffer); | |
189 | if ((result = gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, buffer, &bytes)) < 0) | |
190 | { | |
d0facf48 | 191 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to export public key and X.509 certificate: %s", gnutls_strerror(result))); |
172bdf5d MS |
192 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(result), 0); |
193 | gnutls_x509_crt_deinit(crt); | |
194 | gnutls_x509_privkey_deinit(key); | |
195 | return (0); | |
196 | } | |
197 | else if ((fp = cupsFileOpen(crtfile, "w")) != NULL) | |
198 | { | |
d0facf48 | 199 | DEBUG_printf(("1cupsMakeServerCredentials: Writing public key and X.509 certificate to \"%s\".", crtfile)); |
172bdf5d MS |
200 | cupsFileWrite(fp, (char *)buffer, bytes); |
201 | cupsFileClose(fp); | |
202 | } | |
203 | else | |
204 | { | |
d0facf48 | 205 | DEBUG_printf(("1cupsMakeServerCredentials: Unable to create public key and X.509 certificate file \"%s\": %s", crtfile, strerror(errno))); |
172bdf5d MS |
206 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
207 | gnutls_x509_crt_deinit(crt); | |
208 | gnutls_x509_privkey_deinit(key); | |
209 | return (0); | |
210 | } | |
211 | ||
212 | /* | |
213 | * Cleanup... | |
214 | */ | |
215 | ||
216 | gnutls_x509_crt_deinit(crt); | |
217 | gnutls_x509_privkey_deinit(key); | |
218 | ||
d0facf48 MS |
219 | DEBUG_puts("1cupsMakeServerCredentials: Successfully created credentials."); |
220 | ||
172bdf5d | 221 | return (1); |
07623986 MS |
222 | } |
223 | ||
224 | ||
225 | /* | |
226 | * 'cupsSetServerCredentials()' - Set the default server credentials. | |
227 | * | |
228 | * Note: The server credentials are used by all threads in the running process. | |
229 | * This function is threadsafe. | |
230 | * | |
e1f19878 | 231 | * @since CUPS 2.0/OS 10.10@ |
07623986 MS |
232 | */ |
233 | ||
234 | int /* O - 1 on success, 0 on failure */ | |
235 | cupsSetServerCredentials( | |
236 | const char *path, /* I - Path to keychain/directory */ | |
237 | const char *common_name, /* I - Default common name for server */ | |
238 | int auto_create) /* I - 1 = automatically create self-signed certificates */ | |
239 | { | |
f394e0f7 | 240 | char temp[1024]; /* Default path buffer */ |
172bdf5d MS |
241 | |
242 | ||
243 | DEBUG_printf(("cupsSetServerCredentials(path=\"%s\", common_name=\"%s\", auto_create=%d)", path, common_name, auto_create)); | |
244 | ||
07623986 | 245 | /* |
d0facf48 | 246 | * Use defaults as needed... |
07623986 MS |
247 | */ |
248 | ||
d0facf48 MS |
249 | if (!path) |
250 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
07623986 | 251 | |
172bdf5d | 252 | /* |
d0facf48 | 253 | * Range check input... |
172bdf5d MS |
254 | */ |
255 | ||
d0facf48 | 256 | if (!path || !common_name) |
172bdf5d | 257 | { |
d0facf48 MS |
258 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0); |
259 | return (0); | |
260 | } | |
172bdf5d | 261 | |
d0facf48 MS |
262 | _cupsMutexLock(&tls_mutex); |
263 | ||
264 | /* | |
265 | * Free old values... | |
266 | */ | |
172bdf5d | 267 | |
d0facf48 MS |
268 | if (tls_keypath) |
269 | _cupsStrFree(tls_keypath); | |
172bdf5d | 270 | |
d0facf48 MS |
271 | if (tls_common_name) |
272 | _cupsStrFree(tls_common_name); | |
172bdf5d | 273 | |
07623986 MS |
274 | /* |
275 | * Save the new values... | |
276 | */ | |
277 | ||
278 | tls_keypath = _cupsStrAlloc(path); | |
279 | tls_auto_create = auto_create; | |
280 | tls_common_name = _cupsStrAlloc(common_name); | |
281 | ||
282 | _cupsMutexUnlock(&tls_mutex); | |
283 | ||
284 | return (1); | |
285 | } | |
286 | ||
287 | ||
dd332638 MS |
288 | /* |
289 | * 'httpCopyCredentials()' - Copy the credentials associated with the peer in | |
290 | * an encrypted connection. | |
291 | * | |
292 | * @since CUPS 1.5/OS X 10.7@ | |
293 | */ | |
294 | ||
295 | int /* O - Status of call (0 = success) */ | |
296 | httpCopyCredentials( | |
297 | http_t *http, /* I - Connection to server */ | |
298 | cups_array_t **credentials) /* O - Array of credentials */ | |
299 | { | |
bdc8d1ad MS |
300 | unsigned count; /* Number of certificates */ |
301 | const gnutls_datum_t *certs; /* Certificates */ | |
302 | ||
303 | ||
304 | DEBUG_printf(("httpCopyCredentials(http=%p, credentials=%p)", http, credentials)); | |
305 | ||
dd332638 MS |
306 | if (credentials) |
307 | *credentials = NULL; | |
308 | ||
309 | if (!http || !http->tls || !credentials) | |
310 | return (-1); | |
311 | ||
bdc8d1ad MS |
312 | *credentials = cupsArrayNew(NULL, NULL); |
313 | certs = gnutls_certificate_get_peers(http->tls, &count); | |
314 | ||
315 | DEBUG_printf(("1httpCopyCredentials: certs=%p, count=%u", certs, count)); | |
316 | ||
317 | if (certs && count) | |
318 | { | |
319 | while (count > 0) | |
320 | { | |
321 | httpAddCredential(*credentials, certs->data, certs->size); | |
322 | certs ++; | |
323 | count --; | |
324 | } | |
325 | } | |
326 | ||
dd332638 MS |
327 | return (0); |
328 | } | |
329 | ||
330 | ||
331 | /* | |
332 | * '_httpCreateCredentials()' - Create credentials in the internal format. | |
333 | */ | |
334 | ||
335 | http_tls_credentials_t /* O - Internal credentials */ | |
336 | _httpCreateCredentials( | |
337 | cups_array_t *credentials) /* I - Array of credentials */ | |
338 | { | |
339 | (void)credentials; | |
340 | ||
341 | return (NULL); | |
342 | } | |
343 | ||
344 | ||
345 | /* | |
346 | * '_httpFreeCredentials()' - Free internal credentials. | |
347 | */ | |
348 | ||
349 | void | |
350 | _httpFreeCredentials( | |
351 | http_tls_credentials_t credentials) /* I - Internal credentials */ | |
352 | { | |
353 | (void)credentials; | |
354 | } | |
355 | ||
356 | ||
a15960a1 MS |
357 | /* |
358 | * 'httpCredentialsAreValidForName()' - Return whether the credentials are valid for the given name. | |
359 | * | |
e1f19878 | 360 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
361 | */ |
362 | ||
363 | int /* O - 1 if valid, 0 otherwise */ | |
364 | httpCredentialsAreValidForName( | |
365 | cups_array_t *credentials, /* I - Credentials */ | |
366 | const char *common_name) /* I - Name to check */ | |
367 | { | |
ff82e169 MS |
368 | gnutls_x509_crt_t cert; /* Certificate */ |
369 | int result = 0; /* Result */ | |
a15960a1 MS |
370 | |
371 | ||
ff82e169 MS |
372 | cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials)); |
373 | if (cert) | |
a15960a1 | 374 | { |
ff82e169 MS |
375 | result = gnutls_x509_crt_check_hostname(cert, common_name) != 0; |
376 | gnutls_x509_crt_deinit(cert); | |
a15960a1 | 377 | } |
a15960a1 | 378 | |
ff82e169 | 379 | return (result); |
a15960a1 MS |
380 | } |
381 | ||
382 | ||
383 | /* | |
384 | * 'httpCredentialsGetTrust()' - Return the trust of credentials. | |
385 | * | |
e1f19878 | 386 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
387 | */ |
388 | ||
389 | http_trust_t /* O - Level of trust */ | |
390 | httpCredentialsGetTrust( | |
391 | cups_array_t *credentials, /* I - Credentials */ | |
392 | const char *common_name) /* I - Common name for trust lookup */ | |
393 | { | |
394 | http_trust_t trust = HTTP_TRUST_OK; | |
395 | /* Trusted? */ | |
ff82e169 | 396 | gnutls_x509_crt_t cert; /* Certificate */ |
a15960a1 MS |
397 | cups_array_t *tcreds = NULL; /* Trusted credentials */ |
398 | _cups_globals_t *cg = _cupsGlobals(); | |
399 | /* Per-thread globals */ | |
400 | ||
401 | ||
402 | if (!common_name) | |
403 | return (HTTP_TRUST_UNKNOWN); | |
404 | ||
ff82e169 | 405 | if ((cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials))) == NULL) |
a15960a1 MS |
406 | return (HTTP_TRUST_UNKNOWN); |
407 | ||
3abb875b MS |
408 | if (cg->any_root < 0) |
409 | _cupsSetDefaults(); | |
410 | ||
a15960a1 MS |
411 | /* |
412 | * Look this common name up in the default keychains... | |
413 | */ | |
414 | ||
415 | httpLoadCredentials(NULL, &tcreds, common_name); | |
416 | ||
417 | if (tcreds) | |
418 | { | |
419 | char credentials_str[1024], /* String for incoming credentials */ | |
420 | tcreds_str[1024]; /* String for saved credentials */ | |
421 | ||
422 | httpCredentialsString(credentials, credentials_str, sizeof(credentials_str)); | |
423 | httpCredentialsString(tcreds, tcreds_str, sizeof(tcreds_str)); | |
424 | ||
425 | if (strcmp(credentials_str, tcreds_str)) | |
426 | { | |
427 | /* | |
428 | * Credentials don't match, let's look at the expiration date of the new | |
429 | * credentials and allow if the new ones have a later expiration... | |
430 | */ | |
431 | ||
432 | if (httpCredentialsGetExpiration(credentials) <= httpCredentialsGetExpiration(tcreds) || | |
433 | !httpCredentialsAreValidForName(credentials, common_name)) | |
434 | { | |
435 | /* | |
436 | * Either the new credentials are not newly issued, or the common name | |
437 | * does not match the issued certificate... | |
438 | */ | |
439 | ||
440 | trust = HTTP_TRUST_INVALID; | |
441 | } | |
442 | else if (httpCredentialsGetExpiration(tcreds) < time(NULL)) | |
443 | { | |
444 | /* | |
445 | * Save the renewed credentials... | |
446 | */ | |
447 | ||
448 | trust = HTTP_TRUST_RENEWED; | |
449 | ||
450 | httpSaveCredentials(NULL, credentials, common_name); | |
451 | } | |
452 | } | |
453 | ||
454 | httpFreeCredentials(tcreds); | |
455 | } | |
456 | else if (cg->validate_certs && !httpCredentialsAreValidForName(credentials, common_name)) | |
457 | trust = HTTP_TRUST_INVALID; | |
458 | ||
ff82e169 MS |
459 | if (trust == HTTP_TRUST_OK && !cg->expired_certs) |
460 | { | |
461 | time_t curtime; /* Current date/time */ | |
462 | ||
463 | time(&curtime); | |
464 | if (curtime < gnutls_x509_crt_get_activation_time(cert) || | |
465 | curtime > gnutls_x509_crt_get_expiration_time(cert)) | |
466 | trust = HTTP_TRUST_EXPIRED; | |
467 | } | |
468 | ||
469 | if (trust == HTTP_TRUST_OK && !cg->any_root && cupsArrayCount(credentials) == 1) | |
a15960a1 MS |
470 | trust = HTTP_TRUST_INVALID; |
471 | ||
ff82e169 | 472 | gnutls_x509_crt_deinit(cert); |
a15960a1 MS |
473 | |
474 | return (trust); | |
475 | } | |
476 | ||
477 | ||
478 | /* | |
479 | * 'httpCredentialsGetExpiration()' - Return the expiration date of the credentials. | |
480 | * | |
e1f19878 | 481 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
482 | */ |
483 | ||
484 | time_t /* O - Expiration date of credentials */ | |
485 | httpCredentialsGetExpiration( | |
486 | cups_array_t *credentials) /* I - Credentials */ | |
487 | { | |
ff82e169 MS |
488 | gnutls_x509_crt_t cert; /* Certificate */ |
489 | time_t result = 0; /* Result */ | |
490 | ||
491 | ||
492 | cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
493 | if (cert) | |
494 | { | |
bdc8d1ad | 495 | result = gnutls_x509_crt_get_expiration_time(cert); |
ff82e169 MS |
496 | gnutls_x509_crt_deinit(cert); |
497 | } | |
a15960a1 | 498 | |
ff82e169 | 499 | return (result); |
a15960a1 MS |
500 | } |
501 | ||
502 | ||
503 | /* | |
504 | * 'httpCredentialsString()' - Return a string representing the credentials. | |
505 | * | |
e1f19878 | 506 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
507 | */ |
508 | ||
509 | size_t /* O - Total size of credentials string */ | |
510 | httpCredentialsString( | |
511 | cups_array_t *credentials, /* I - Credentials */ | |
512 | char *buffer, /* I - Buffer or @code NULL@ */ | |
513 | size_t bufsize) /* I - Size of buffer */ | |
514 | { | |
ff82e169 MS |
515 | http_credential_t *first; /* First certificate */ |
516 | gnutls_x509_crt_t cert; /* Certificate */ | |
517 | ||
518 | ||
a15960a1 MS |
519 | DEBUG_printf(("httpCredentialsString(credentials=%p, buffer=%p, bufsize=" CUPS_LLFMT ")", credentials, buffer, CUPS_LLCAST bufsize)); |
520 | ||
521 | if (!buffer) | |
522 | return (0); | |
523 | ||
524 | if (buffer && bufsize > 0) | |
525 | *buffer = '\0'; | |
526 | ||
a15960a1 | 527 | if ((first = (http_credential_t *)cupsArrayFirst(credentials)) != NULL && |
ff82e169 | 528 | (cert = http_gnutls_create_credential(first)) != NULL) |
a15960a1 | 529 | { |
a15960a1 | 530 | char name[256]; /* Common name associated with cert */ |
bdc8d1ad | 531 | size_t namelen; /* Length of name */ |
a15960a1 MS |
532 | time_t expiration; /* Expiration date of cert */ |
533 | _cups_md5_state_t md5_state; /* MD5 state */ | |
534 | unsigned char md5_digest[16]; /* MD5 result */ | |
535 | ||
bdc8d1ad MS |
536 | namelen = sizeof(name) - 1; |
537 | if (gnutls_x509_crt_get_dn_by_oid(cert, GNUTLS_OID_X520_COMMON_NAME, 0, 0, name, &namelen) >= 0) | |
538 | name[namelen] = '\0'; | |
539 | else | |
a15960a1 MS |
540 | strlcpy(name, "unknown", sizeof(name)); |
541 | ||
ff82e169 | 542 | expiration = gnutls_x509_crt_get_expiration_time(cert); |
a15960a1 MS |
543 | |
544 | _cupsMD5Init(&md5_state); | |
545 | _cupsMD5Append(&md5_state, first->data, (int)first->datalen); | |
546 | _cupsMD5Finish(&md5_state, md5_digest); | |
547 | ||
548 | 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]); | |
549 | ||
ff82e169 | 550 | gnutls_x509_crt_deinit(cert); |
a15960a1 | 551 | } |
a15960a1 MS |
552 | |
553 | DEBUG_printf(("1httpCredentialsString: Returning \"%s\".", buffer)); | |
554 | ||
555 | return (strlen(buffer)); | |
556 | } | |
557 | ||
558 | ||
559 | /* | |
560 | * 'httpLoadCredentials()' - Load X.509 credentials from a keychain file. | |
561 | * | |
e1f19878 | 562 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
563 | */ |
564 | ||
565 | int /* O - 0 on success, -1 on error */ | |
566 | httpLoadCredentials( | |
567 | const char *path, /* I - Keychain/PKCS#12 path */ | |
568 | cups_array_t **credentials, /* IO - Credentials */ | |
569 | const char *common_name) /* I - Common name for credentials */ | |
570 | { | |
ff82e169 MS |
571 | cups_file_t *fp; /* Certificate file */ |
572 | char filename[1024], /* filename.crt */ | |
573 | temp[1024], /* Temporary string */ | |
574 | line[256]; /* Base64-encoded line */ | |
575 | unsigned char *data = NULL; /* Buffer for cert data */ | |
576 | size_t alloc_data = 0, /* Bytes allocated */ | |
577 | num_data = 0; /* Bytes used */ | |
578 | int decoded; /* Bytes decoded */ | |
579 | ||
580 | ||
581 | if (!credentials || !common_name) | |
582 | return (-1); | |
583 | ||
584 | if (!path) | |
585 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
586 | if (!path) | |
587 | return (-1); | |
588 | ||
26435c51 | 589 | http_gnutls_make_path(filename, sizeof(filename), path, common_name, "crt"); |
ff82e169 MS |
590 | |
591 | if ((fp = cupsFileOpen(filename, "r")) == NULL) | |
592 | return (-1); | |
593 | ||
594 | while (cupsFileGets(fp, line, sizeof(line))) | |
595 | { | |
596 | if (!strcmp(line, "-----BEGIN CERTIFICATE-----")) | |
597 | { | |
598 | if (num_data) | |
599 | { | |
600 | /* | |
601 | * Missing END CERTIFICATE... | |
602 | */ | |
603 | ||
604 | httpFreeCredentials(*credentials); | |
605 | *credentials = NULL; | |
606 | break; | |
607 | } | |
608 | } | |
609 | else if (!strcmp(line, "-----END CERTIFICATE-----")) | |
610 | { | |
611 | if (!num_data) | |
612 | { | |
613 | /* | |
614 | * Missing data... | |
615 | */ | |
a15960a1 | 616 | |
ff82e169 MS |
617 | httpFreeCredentials(*credentials); |
618 | *credentials = NULL; | |
619 | break; | |
620 | } | |
621 | ||
622 | if (!*credentials) | |
623 | *credentials = cupsArrayNew(NULL, NULL); | |
624 | ||
625 | if (httpAddCredential(*credentials, data, num_data)) | |
626 | { | |
627 | httpFreeCredentials(*credentials); | |
628 | *credentials = NULL; | |
629 | break; | |
630 | } | |
631 | ||
632 | num_data = 0; | |
633 | } | |
634 | else | |
635 | { | |
636 | if (alloc_data == 0) | |
637 | { | |
638 | data = malloc(2048); | |
639 | alloc_data = 2048; | |
640 | ||
641 | if (!data) | |
642 | break; | |
643 | } | |
644 | else if ((num_data + strlen(line)) >= alloc_data) | |
645 | { | |
646 | unsigned char *tdata = realloc(data, alloc_data + 1024); | |
647 | /* Expanded buffer */ | |
648 | ||
649 | if (!tdata) | |
650 | { | |
651 | httpFreeCredentials(*credentials); | |
652 | *credentials = NULL; | |
653 | break; | |
654 | } | |
655 | ||
656 | data = tdata; | |
657 | alloc_data += 1024; | |
658 | } | |
659 | ||
660 | decoded = alloc_data - num_data; | |
bdc8d1ad MS |
661 | httpDecode64_2((char *)data + num_data, &decoded, line); |
662 | num_data += (size_t)decoded; | |
ff82e169 MS |
663 | } |
664 | } | |
665 | ||
666 | cupsFileClose(fp); | |
667 | ||
668 | if (num_data) | |
669 | { | |
670 | /* | |
671 | * Missing END CERTIFICATE... | |
672 | */ | |
673 | ||
674 | httpFreeCredentials(*credentials); | |
675 | *credentials = NULL; | |
676 | } | |
677 | ||
678 | if (data) | |
679 | free(data); | |
680 | ||
681 | return (*credentials ? 0 : -1); | |
a15960a1 MS |
682 | } |
683 | ||
684 | ||
685 | /* | |
686 | * 'httpSaveCredentials()' - Save X.509 credentials to a keychain file. | |
687 | * | |
e1f19878 | 688 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
689 | */ |
690 | ||
691 | int /* O - -1 on error, 0 on success */ | |
692 | httpSaveCredentials( | |
693 | const char *path, /* I - Keychain/PKCS#12 path */ | |
694 | cups_array_t *credentials, /* I - Credentials */ | |
695 | const char *common_name) /* I - Common name for credentials */ | |
696 | { | |
ff82e169 MS |
697 | cups_file_t *fp; /* Certificate file */ |
698 | char filename[1024], /* filename.crt */ | |
699 | nfilename[1024],/* filename.crt.N */ | |
700 | temp[1024], /* Temporary string */ | |
bdc8d1ad | 701 | line[256]; /* Base64-encoded line */ |
ff82e169 | 702 | const unsigned char *ptr; /* Pointer into certificate */ |
bdc8d1ad | 703 | ssize_t remaining; /* Bytes left */ |
ff82e169 MS |
704 | http_credential_t *cred; /* Current credential */ |
705 | ||
706 | ||
707 | if (!credentials || !common_name) | |
708 | return (-1); | |
709 | ||
710 | if (!path) | |
711 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
712 | if (!path) | |
713 | return (-1); | |
714 | ||
26435c51 MS |
715 | http_gnutls_make_path(filename, sizeof(filename), path, common_name, "crt"); |
716 | snprintf(nfilename, sizeof(nfilename), "%s.N", filename); | |
ff82e169 MS |
717 | |
718 | if ((fp = cupsFileOpen(nfilename, "w")) == NULL) | |
719 | return (-1); | |
720 | ||
721 | fchmod(cupsFileNumber(fp), 0600); | |
722 | ||
723 | for (cred = (http_credential_t *)cupsArrayFirst(credentials); | |
724 | cred; | |
725 | cred = (http_credential_t *)cupsArrayNext(credentials)) | |
726 | { | |
727 | cupsFilePuts(fp, "-----BEGIN CERTIFICATE-----\n"); | |
bdc8d1ad | 728 | for (ptr = cred->data, remaining = (ssize_t)cred->datalen; remaining > 0; remaining -= 45, ptr += 45) |
ff82e169 | 729 | { |
bdc8d1ad | 730 | httpEncode64_2(line, sizeof(line), (char *)ptr, remaining > 45 ? 45 : remaining); |
ff82e169 MS |
731 | cupsFilePrintf(fp, "%s\n", line); |
732 | } | |
733 | cupsFilePuts(fp, "-----END CERTIFICATE-----\n"); | |
734 | } | |
735 | ||
736 | cupsFileClose(fp); | |
737 | ||
738 | return (rename(nfilename, filename)); | |
739 | } | |
740 | ||
741 | ||
742 | /* | |
743 | * 'http_gnutls_create_credential()' - Create a single credential in the internal format. | |
744 | */ | |
745 | ||
746 | static gnutls_x509_crt_t /* O - Certificate */ | |
747 | http_gnutls_create_credential( | |
748 | http_credential_t *credential) /* I - Credential */ | |
749 | { | |
bdc8d1ad MS |
750 | int result; /* Result from GNU TLS */ |
751 | gnutls_x509_crt_t cert; /* Certificate */ | |
ff82e169 MS |
752 | gnutls_datum_t datum; /* Data record */ |
753 | ||
754 | ||
bdc8d1ad MS |
755 | DEBUG_printf(("3http_gnutls_create_credential(credential=%p)", credential)); |
756 | ||
ff82e169 MS |
757 | if (!credential) |
758 | return (NULL); | |
759 | ||
bdc8d1ad MS |
760 | if ((result = gnutls_x509_crt_init(&cert)) < 0) |
761 | { | |
762 | DEBUG_printf(("4http_gnutls_create_credential: init error: %s", gnutls_strerror(result))); | |
ff82e169 | 763 | return (NULL); |
bdc8d1ad | 764 | } |
ff82e169 | 765 | |
bdc8d1ad MS |
766 | datum.data = credential->data; |
767 | datum.size = credential->datalen; | |
ff82e169 | 768 | |
bdc8d1ad | 769 | if ((result = gnutls_x509_crt_import(cert, &datum, GNUTLS_X509_FMT_DER)) < 0) |
ff82e169 | 770 | { |
bdc8d1ad MS |
771 | DEBUG_printf(("4http_gnutls_create_credential: import error: %s", gnutls_strerror(result))); |
772 | ||
ff82e169 MS |
773 | gnutls_x509_crt_deinit(cert); |
774 | return (NULL); | |
775 | } | |
a15960a1 | 776 | |
ff82e169 | 777 | return (cert); |
a15960a1 MS |
778 | } |
779 | ||
780 | ||
d0facf48 MS |
781 | /* |
782 | * 'http_gnutls_default_path()' - Get the default credential store path. | |
783 | */ | |
784 | ||
785 | static const char * /* O - Path or NULL on error */ | |
786 | http_gnutls_default_path(char *buffer,/* I - Path buffer */ | |
787 | size_t bufsize)/* I - Size of path buffer */ | |
788 | { | |
789 | const char *home = getenv("HOME"); /* HOME environment variable */ | |
790 | ||
791 | ||
792 | if (getuid() && home) | |
793 | { | |
794 | snprintf(buffer, bufsize, "%s/.cups", home); | |
795 | if (access(buffer, 0)) | |
796 | { | |
797 | DEBUG_printf(("1http_gnutls_default_path: Making directory \"%s\".", buffer)); | |
798 | if (mkdir(buffer, 0700)) | |
799 | { | |
800 | DEBUG_printf(("1http_gnutls_default_path: Failed to make directory: %s", strerror(errno))); | |
801 | return (NULL); | |
802 | } | |
803 | } | |
804 | ||
805 | snprintf(buffer, bufsize, "%s/.cups/ssl", home); | |
806 | if (access(buffer, 0)) | |
807 | { | |
808 | DEBUG_printf(("1http_gnutls_default_path: Making directory \"%s\".", buffer)); | |
809 | if (mkdir(buffer, 0700)) | |
810 | { | |
811 | DEBUG_printf(("1http_gnutls_default_path: Failed to make directory: %s", strerror(errno))); | |
812 | return (NULL); | |
813 | } | |
814 | } | |
815 | } | |
816 | else | |
817 | strlcpy(buffer, CUPS_SERVERROOT "/ssl", bufsize); | |
818 | ||
819 | DEBUG_printf(("1http_gnutls_default_path: Using default path \"%s\".", buffer)); | |
820 | ||
821 | return (buffer); | |
822 | } | |
823 | ||
824 | ||
26435c51 MS |
825 | /* |
826 | * 'http_gnutls_make_path()' - Format a filename for a certificate or key file. | |
827 | */ | |
828 | ||
829 | static const char * /* O - Filename */ | |
830 | http_gnutls_make_path( | |
831 | char *buffer, /* I - Filename buffer */ | |
832 | size_t bufsize, /* I - Size of buffer */ | |
833 | const char *dirname, /* I - Directory */ | |
834 | const char *filename, /* I - Filename (usually hostname) */ | |
835 | const char *ext) /* I - Extension */ | |
836 | { | |
837 | char *bufptr, /* Pointer into buffer */ | |
838 | *bufend = buffer + bufsize - 1; /* End of buffer */ | |
839 | ||
840 | ||
841 | snprintf(buffer, bufsize, "%s/", dirname); | |
842 | bufptr = buffer + strlen(buffer); | |
843 | ||
844 | while (*filename && bufptr < bufend) | |
845 | { | |
846 | if (_cups_isalnum(*filename) || *filename == '-' || *filename == '.') | |
847 | *bufptr++ = *filename; | |
848 | else | |
849 | *bufptr++ = '_'; | |
850 | ||
851 | filename ++; | |
852 | } | |
853 | ||
854 | if (bufptr < bufend) | |
855 | *bufptr++ = '.'; | |
856 | ||
a2751f30 | 857 | strlcpy(bufptr, ext, (size_t)(bufend - bufptr + 1)); |
26435c51 MS |
858 | |
859 | return (buffer); | |
860 | } | |
861 | ||
862 | ||
dd332638 MS |
863 | /* |
864 | * 'http_gnutls_read()' - Read function for the GNU TLS library. | |
865 | */ | |
866 | ||
867 | static ssize_t /* O - Number of bytes read or -1 on error */ | |
868 | http_gnutls_read( | |
869 | gnutls_transport_ptr_t ptr, /* I - Connection to server */ | |
870 | void *data, /* I - Buffer */ | |
871 | size_t length) /* I - Number of bytes to read */ | |
872 | { | |
873 | http_t *http; /* HTTP connection */ | |
874 | ssize_t bytes; /* Bytes read */ | |
875 | ||
876 | ||
877 | DEBUG_printf(("6http_gnutls_read(ptr=%p, data=%p, length=%d)", ptr, data, (int)length)); | |
878 | ||
879 | http = (http_t *)ptr; | |
880 | ||
881 | if (!http->blocking) | |
882 | { | |
883 | /* | |
884 | * Make sure we have data before we read... | |
885 | */ | |
886 | ||
887 | while (!_httpWait(http, http->wait_value, 0)) | |
888 | { | |
889 | if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) | |
890 | continue; | |
891 | ||
892 | http->error = ETIMEDOUT; | |
893 | return (-1); | |
894 | } | |
895 | } | |
896 | ||
897 | bytes = recv(http->fd, data, length, 0); | |
898 | DEBUG_printf(("6http_gnutls_read: bytes=%d", (int)bytes)); | |
899 | return (bytes); | |
900 | } | |
901 | ||
902 | ||
903 | /* | |
904 | * 'http_gnutls_write()' - Write function for the GNU TLS library. | |
905 | */ | |
906 | ||
907 | static ssize_t /* O - Number of bytes written or -1 on error */ | |
908 | http_gnutls_write( | |
909 | gnutls_transport_ptr_t ptr, /* I - Connection to server */ | |
910 | const void *data, /* I - Data buffer */ | |
911 | size_t length) /* I - Number of bytes to write */ | |
912 | { | |
913 | ssize_t bytes; /* Bytes written */ | |
914 | ||
915 | ||
916 | DEBUG_printf(("6http_gnutls_write(ptr=%p, data=%p, length=%d)", ptr, data, | |
917 | (int)length)); | |
dd332638 MS |
918 | bytes = send(((http_t *)ptr)->fd, data, length, 0); |
919 | DEBUG_printf(("http_gnutls_write: bytes=%d", (int)bytes)); | |
920 | ||
921 | return (bytes); | |
922 | } | |
2c85b752 MS |
923 | |
924 | ||
925 | /* | |
172bdf5d | 926 | * '_httpTLSInitialize()' - Initialize the TLS stack. |
2c85b752 MS |
927 | */ |
928 | ||
172bdf5d MS |
929 | void |
930 | _httpTLSInitialize(void) | |
2c85b752 | 931 | { |
2c85b752 MS |
932 | /* |
933 | * Initialize GNU TLS... | |
934 | */ | |
935 | ||
936 | gnutls_global_init(); | |
dd332638 | 937 | } |
2c85b752 | 938 | |
2c85b752 | 939 | |
dd332638 | 940 | /* |
172bdf5d | 941 | * '_httpTLSPending()' - Return the number of pending TLS-encrypted bytes. |
dd332638 | 942 | */ |
2c85b752 | 943 | |
172bdf5d MS |
944 | size_t /* O - Bytes available */ |
945 | _httpTLSPending(http_t *http) /* I - HTTP connection */ | |
dd332638 MS |
946 | { |
947 | return (gnutls_record_check_pending(http->tls)); | |
2c85b752 MS |
948 | } |
949 | ||
950 | ||
2c85b752 | 951 | /* |
172bdf5d | 952 | * '_httpTLSRead()' - Read from a SSL/TLS connection. |
2c85b752 MS |
953 | */ |
954 | ||
172bdf5d MS |
955 | int /* O - Bytes read */ |
956 | _httpTLSRead(http_t *http, /* I - Connection to server */ | |
957 | char *buf, /* I - Buffer to store data */ | |
958 | int len) /* I - Length of buffer */ | |
2c85b752 | 959 | { |
2c85b752 MS |
960 | ssize_t result; /* Return value */ |
961 | ||
962 | ||
07623986 | 963 | result = gnutls_record_recv(http->tls, buf, (size_t)len); |
2c85b752 MS |
964 | |
965 | if (result < 0 && !errno) | |
966 | { | |
967 | /* | |
968 | * Convert GNU TLS error to errno value... | |
969 | */ | |
970 | ||
971 | switch (result) | |
972 | { | |
973 | case GNUTLS_E_INTERRUPTED : | |
974 | errno = EINTR; | |
975 | break; | |
976 | ||
977 | case GNUTLS_E_AGAIN : | |
978 | errno = EAGAIN; | |
979 | break; | |
980 | ||
981 | default : | |
982 | errno = EPIPE; | |
983 | break; | |
984 | } | |
985 | ||
986 | result = -1; | |
987 | } | |
988 | ||
989 | return ((int)result); | |
dd332638 | 990 | } |
2c85b752 MS |
991 | |
992 | ||
dd332638 | 993 | /* |
172bdf5d | 994 | * '_httpTLSSetCredentials()' - Set the TLS credentials. |
dd332638 | 995 | */ |
2c85b752 | 996 | |
172bdf5d MS |
997 | int /* O - Status of connection */ |
998 | _httpTLSSetCredentials(http_t *http) /* I - Connection to server */ | |
dd332638 MS |
999 | { |
1000 | (void)http; | |
2c85b752 | 1001 | |
dd332638 | 1002 | return (0); |
2c85b752 | 1003 | } |
2c85b752 MS |
1004 | |
1005 | ||
63aefcd5 MS |
1006 | /* |
1007 | * '_httpTLSSetOptions()' - Set TLS protocol and cipher suite options. | |
1008 | */ | |
1009 | ||
1010 | void | |
1011 | _httpTLSSetOptions(int options) /* I - Options */ | |
1012 | { | |
1013 | tls_options = options; | |
1014 | } | |
1015 | ||
1016 | ||
2c85b752 | 1017 | /* |
172bdf5d | 1018 | * '_httpTLSStart()' - Set up SSL/TLS support on a connection. |
2c85b752 MS |
1019 | */ |
1020 | ||
172bdf5d MS |
1021 | int /* O - 0 on success, -1 on failure */ |
1022 | _httpTLSStart(http_t *http) /* I - Connection to server */ | |
2c85b752 MS |
1023 | { |
1024 | char hostname[256], /* Hostname */ | |
1025 | *hostptr; /* Pointer into hostname */ | |
2c85b752 | 1026 | int status; /* Status of handshake */ |
172bdf5d | 1027 | gnutls_certificate_credentials_t *credentials; |
2c85b752 | 1028 | /* TLS credentials */ |
ee6226a5 MS |
1029 | char priority_string[1024]; |
1030 | /* Priority string */ | |
2c85b752 MS |
1031 | |
1032 | ||
b37d45d9 MS |
1033 | DEBUG_printf(("3_httpTLSStart(http=%p)", http)); |
1034 | ||
1035 | if (tls_options < 0) | |
1036 | { | |
1037 | DEBUG_puts("4_httpTLSStart: Setting defaults."); | |
1038 | _cupsSetDefaults(); | |
1039 | DEBUG_printf(("4_httpTLSStart: tls_options=%x", tls_options)); | |
1040 | } | |
2c85b752 | 1041 | |
172bdf5d | 1042 | if (http->mode == _HTTP_MODE_SERVER && !tls_keypath) |
2c85b752 | 1043 | { |
172bdf5d MS |
1044 | DEBUG_puts("4_httpTLSStart: cupsSetServerCredentials not called."); |
1045 | http->error = errno = EINVAL; | |
1046 | http->status = HTTP_STATUS_ERROR; | |
1047 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Server credentials not set."), 1); | |
2c85b752 | 1048 | |
172bdf5d | 1049 | return (-1); |
2c85b752 MS |
1050 | } |
1051 | ||
172bdf5d MS |
1052 | credentials = (gnutls_certificate_credentials_t *) |
1053 | malloc(sizeof(gnutls_certificate_credentials_t)); | |
2c85b752 MS |
1054 | if (credentials == NULL) |
1055 | { | |
172bdf5d | 1056 | DEBUG_printf(("8_httpStartTLS: Unable to allocate credentials: %s", |
2c85b752 MS |
1057 | strerror(errno))); |
1058 | http->error = errno; | |
1059 | http->status = HTTP_STATUS_ERROR; | |
1060 | _cupsSetHTTPError(HTTP_STATUS_ERROR); | |
1061 | ||
1062 | return (-1); | |
1063 | } | |
1064 | ||
1065 | gnutls_certificate_allocate_credentials(credentials); | |
d0facf48 | 1066 | status = gnutls_init(&http->tls, http->mode == _HTTP_MODE_CLIENT ? GNUTLS_CLIENT : GNUTLS_SERVER); |
d0facf48 | 1067 | if (!status) |
005f7f1f | 1068 | status = gnutls_set_default_priority(http->tls); |
d0facf48 MS |
1069 | |
1070 | if (status) | |
1071 | { | |
1072 | http->error = EIO; | |
1073 | http->status = HTTP_STATUS_ERROR; | |
1074 | ||
1075 | DEBUG_printf(("4_httpTLSStart: Unable to initialize common TLS parameters: %s", gnutls_strerror(status))); | |
1076 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1077 | ||
1078 | gnutls_deinit(http->tls); | |
1079 | gnutls_certificate_free_credentials(*credentials); | |
1080 | free(credentials); | |
1081 | http->tls = NULL; | |
1082 | ||
1083 | return (-1); | |
1084 | } | |
2c85b752 | 1085 | |
f394e0f7 | 1086 | if (http->mode == _HTTP_MODE_CLIENT) |
172bdf5d MS |
1087 | { |
1088 | /* | |
1089 | * Client: get the hostname to use for TLS... | |
1090 | */ | |
1091 | ||
1092 | if (httpAddrLocalhost(http->hostaddr)) | |
1093 | { | |
1094 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
1095 | } | |
1096 | else | |
1097 | { | |
1098 | /* | |
1099 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
1100 | */ | |
1101 | ||
1102 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
1103 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
1104 | *hostptr == '.') | |
1105 | *hostptr = '\0'; | |
1106 | } | |
1107 | ||
d0facf48 | 1108 | status = gnutls_server_name_set(http->tls, GNUTLS_NAME_DNS, hostname, strlen(hostname)); |
172bdf5d MS |
1109 | } |
1110 | else | |
1111 | { | |
1112 | /* | |
1113 | * Server: get certificate and private key... | |
1114 | */ | |
1115 | ||
1116 | char crtfile[1024], /* Certificate file */ | |
1117 | keyfile[1024]; /* Private key file */ | |
1118 | int have_creds = 0; /* Have credentials? */ | |
1119 | ||
172bdf5d MS |
1120 | if (http->fields[HTTP_FIELD_HOST][0]) |
1121 | { | |
1122 | /* | |
1123 | * Use hostname for TLS upgrade... | |
1124 | */ | |
1125 | ||
1126 | strlcpy(hostname, http->fields[HTTP_FIELD_HOST], sizeof(hostname)); | |
1127 | } | |
1128 | else | |
1129 | { | |
1130 | /* | |
1131 | * Resolve hostname from connection address... | |
1132 | */ | |
1133 | ||
1134 | http_addr_t addr; /* Connection address */ | |
1135 | socklen_t addrlen; /* Length of address */ | |
1136 | ||
1137 | addrlen = sizeof(addr); | |
1138 | if (getsockname(http->fd, (struct sockaddr *)&addr, &addrlen)) | |
1139 | { | |
1140 | DEBUG_printf(("4_httpTLSStart: Unable to get socket address: %s", strerror(errno))); | |
1141 | hostname[0] = '\0'; | |
1142 | } | |
1143 | else if (httpAddrLocalhost(&addr)) | |
1144 | hostname[0] = '\0'; | |
1145 | else | |
1146 | { | |
1147 | httpAddrLookup(&addr, hostname, sizeof(hostname)); | |
1148 | DEBUG_printf(("4_httpTLSStart: Resolved socket address to \"%s\".", hostname)); | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | if (isdigit(hostname[0] & 255) || hostname[0] == '[') | |
1153 | hostname[0] = '\0'; /* Don't allow numeric addresses */ | |
1154 | ||
1155 | if (hostname[0]) | |
1156 | { | |
26435c51 MS |
1157 | http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, hostname, "crt"); |
1158 | http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, hostname, "key"); | |
172bdf5d MS |
1159 | |
1160 | have_creds = !access(crtfile, 0) && !access(keyfile, 0); | |
1161 | } | |
1162 | else if (tls_common_name) | |
1163 | { | |
26435c51 MS |
1164 | http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, tls_common_name, "crt"); |
1165 | http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, tls_common_name, "key"); | |
172bdf5d MS |
1166 | |
1167 | have_creds = !access(crtfile, 0) && !access(keyfile, 0); | |
1168 | } | |
1169 | ||
1170 | if (!have_creds && tls_auto_create && (hostname[0] || tls_common_name)) | |
1171 | { | |
1172 | DEBUG_printf(("4_httpTLSStart: Auto-create credentials for \"%s\".", hostname[0] ? hostname : tls_common_name)); | |
1173 | ||
1174 | if (!cupsMakeServerCredentials(tls_keypath, hostname[0] ? hostname : tls_common_name, 0, NULL, time(NULL) + 365 * 86400)) | |
1175 | { | |
1176 | DEBUG_puts("4_httpTLSStart: cupsMakeServerCredentials failed."); | |
1177 | http->error = errno = EINVAL; | |
1178 | http->status = HTTP_STATUS_ERROR; | |
1179 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unable to create server credentials."), 1); | |
1180 | ||
1181 | return (-1); | |
1182 | } | |
1183 | } | |
1184 | ||
d0facf48 MS |
1185 | DEBUG_printf(("4_httpTLSStart: Using certificate \"%s\" and private key \"%s\".", crtfile, keyfile)); |
1186 | ||
1187 | status = gnutls_certificate_set_x509_key_file(*credentials, crtfile, keyfile, GNUTLS_X509_FMT_PEM); | |
1188 | } | |
1189 | ||
1190 | if (!status) | |
1191 | status = gnutls_credentials_set(http->tls, GNUTLS_CRD_CERTIFICATE, *credentials); | |
1192 | ||
1193 | if (status) | |
1194 | { | |
1195 | http->error = EIO; | |
1196 | http->status = HTTP_STATUS_ERROR; | |
1197 | ||
1198 | DEBUG_printf(("4_httpTLSStart: Unable to complete client/server setup: %s", gnutls_strerror(status))); | |
1199 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1200 | ||
1201 | gnutls_deinit(http->tls); | |
1202 | gnutls_certificate_free_credentials(*credentials); | |
1203 | free(credentials); | |
1204 | http->tls = NULL; | |
1205 | ||
1206 | return (-1); | |
172bdf5d MS |
1207 | } |
1208 | ||
838bcb92 MS |
1209 | strlcpy(priority_string, "NORMAL", sizeof(priority_string)); |
1210 | ||
1211 | if (tls_options & _HTTP_TLS_DENY_TLS10) | |
1212 | strlcat(priority_string, ":+VERS-TLS-ALL:-VERS-TLS1.0:-VERS-SSL3.0", sizeof(priority_string)); | |
1213 | else if (tls_options & _HTTP_TLS_ALLOW_SSL3) | |
1214 | strlcat(priority_string, ":+VERS-TLS-ALL", sizeof(priority_string)); | |
63aefcd5 | 1215 | else |
838bcb92 | 1216 | strlcat(priority_string, ":+VERS-TLS-ALL:-VERS-SSL3.0", sizeof(priority_string)); |
ee6226a5 | 1217 | |
838bcb92 MS |
1218 | if (!(tls_options & _HTTP_TLS_ALLOW_RC4)) |
1219 | strlcat(priority_string, ":-ARCFOUR-128", sizeof(priority_string)); | |
ee6226a5 | 1220 | |
838bcb92 | 1221 | if (!(tls_options & _HTTP_TLS_ALLOW_DH)) |
72aa7cb4 | 1222 | strlcat(priority_string, ":!ANON-DH", sizeof(priority_string)); |
ee6226a5 | 1223 | |
ee6226a5 MS |
1224 | #ifdef HAVE_GNUTLS_PRIORITY_SET_DIRECT |
1225 | gnutls_priority_set_direct(http->tls, priority_string, NULL); | |
63aefcd5 | 1226 | |
19ba6878 MS |
1227 | #else |
1228 | gnutls_priority_t priority; /* Priority */ | |
1229 | ||
ee6226a5 | 1230 | gnutls_priority_init(&priority, priority_string, NULL); |
19ba6878 MS |
1231 | gnutls_priority_set(http->tls, priority); |
1232 | gnutls_priority_deinit(priority); | |
1233 | #endif /* HAVE_GNUTLS_PRIORITY_SET_DIRECT */ | |
1234 | ||
d0facf48 MS |
1235 | gnutls_transport_set_ptr(http->tls, (gnutls_transport_ptr_t)http); |
1236 | gnutls_transport_set_pull_function(http->tls, http_gnutls_read); | |
e7312eb4 | 1237 | #ifdef HAVE_GNUTLS_TRANSPORT_SET_PULL_TIMEOUT_FUNCTION |
d0facf48 | 1238 | gnutls_transport_set_pull_timeout_function(http->tls, (gnutls_pull_timeout_func)httpWait); |
e7312eb4 | 1239 | #endif /* HAVE_GNUTLS_TRANSPORT_SET_PULL_TIMEOUT_FUNCTION */ |
d0facf48 MS |
1240 | gnutls_transport_set_push_function(http->tls, http_gnutls_write); |
1241 | ||
2c85b752 MS |
1242 | while ((status = gnutls_handshake(http->tls)) != GNUTLS_E_SUCCESS) |
1243 | { | |
d0facf48 | 1244 | DEBUG_printf(("5_httpStartTLS: gnutls_handshake returned %d (%s)", |
2c85b752 MS |
1245 | status, gnutls_strerror(status))); |
1246 | ||
1247 | if (gnutls_error_is_fatal(status)) | |
1248 | { | |
1249 | http->error = EIO; | |
1250 | http->status = HTTP_STATUS_ERROR; | |
1251 | ||
1252 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1253 | ||
1254 | gnutls_deinit(http->tls); | |
1255 | gnutls_certificate_free_credentials(*credentials); | |
1256 | free(credentials); | |
1257 | http->tls = NULL; | |
1258 | ||
1259 | return (-1); | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | http->tls_credentials = credentials; | |
1264 | ||
2c85b752 MS |
1265 | return (0); |
1266 | } | |
1267 | ||
1268 | ||
1269 | /* | |
172bdf5d | 1270 | * '_httpTLSStop()' - Shut down SSL/TLS on a connection. |
2c85b752 MS |
1271 | */ |
1272 | ||
172bdf5d MS |
1273 | void |
1274 | _httpTLSStop(http_t *http) /* I - Connection to server */ | |
2c85b752 | 1275 | { |
172bdf5d MS |
1276 | int error; /* Error code */ |
1277 | ||
2c85b752 | 1278 | |
f394e0f7 | 1279 | error = gnutls_bye(http->tls, http->mode == _HTTP_MODE_CLIENT ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR); |
172bdf5d | 1280 | if (error != GNUTLS_E_SUCCESS) |
f394e0f7 | 1281 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(errno), 0); |
2c85b752 | 1282 | |
2c85b752 | 1283 | gnutls_deinit(http->tls); |
172bdf5d MS |
1284 | http->tls = NULL; |
1285 | ||
d0facf48 MS |
1286 | if (http->tls_credentials) |
1287 | { | |
1288 | gnutls_certificate_free_credentials(*(http->tls_credentials)); | |
1289 | free(http->tls_credentials); | |
1290 | http->tls_credentials = NULL; | |
1291 | } | |
2c85b752 | 1292 | } |
2c85b752 MS |
1293 | |
1294 | ||
2c85b752 | 1295 | /* |
172bdf5d | 1296 | * '_httpTLSWrite()' - Write to a SSL/TLS connection. |
2c85b752 MS |
1297 | */ |
1298 | ||
172bdf5d MS |
1299 | int /* O - Bytes written */ |
1300 | _httpTLSWrite(http_t *http, /* I - Connection to server */ | |
1301 | const char *buf, /* I - Buffer holding data */ | |
1302 | int len) /* I - Length of buffer */ | |
2c85b752 MS |
1303 | { |
1304 | ssize_t result; /* Return value */ | |
1305 | ||
1306 | ||
1307 | DEBUG_printf(("2http_write_ssl(http=%p, buf=%p, len=%d)", http, buf, len)); | |
1308 | ||
07623986 | 1309 | result = gnutls_record_send(http->tls, buf, (size_t)len); |
2c85b752 MS |
1310 | |
1311 | if (result < 0 && !errno) | |
1312 | { | |
1313 | /* | |
1314 | * Convert GNU TLS error to errno value... | |
1315 | */ | |
1316 | ||
1317 | switch (result) | |
1318 | { | |
1319 | case GNUTLS_E_INTERRUPTED : | |
1320 | errno = EINTR; | |
1321 | break; | |
1322 | ||
1323 | case GNUTLS_E_AGAIN : | |
1324 | errno = EAGAIN; | |
1325 | break; | |
1326 | ||
1327 | default : | |
1328 | errno = EPIPE; | |
1329 | break; | |
1330 | } | |
1331 | ||
1332 | result = -1; | |
1333 | } | |
1334 | ||
2c85b752 MS |
1335 | DEBUG_printf(("3http_write_ssl: Returning %d.", (int)result)); |
1336 | ||
1337 | return ((int)result); | |
1338 | } |