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2c85b752 | 1 | /* |
2c85b752 MS |
2 | * TLS support code for CUPS using GNU TLS. |
3 | * | |
08d56b1f | 4 | * Copyright 2007-2016 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 */ | |
08d56b1f | 33 | static gnutls_x509_crl_t tls_crl = NULL;/* Certificate revocation list */ |
07623986 MS |
34 | static char *tls_keypath = NULL; |
35 | /* Server cert keychain path */ | |
36 | static _cups_mutex_t tls_mutex = _CUPS_MUTEX_INITIALIZER; | |
37 | /* Mutex for keychain/certs */ | |
b37d45d9 | 38 | static int tls_options = -1;/* Options for TLS connections */ |
07623986 MS |
39 | |
40 | ||
2c85b752 MS |
41 | /* |
42 | * Local functions... | |
43 | */ | |
44 | ||
ff82e169 | 45 | static gnutls_x509_crt_t http_gnutls_create_credential(http_credential_t *credential); |
d0facf48 | 46 | static const char *http_gnutls_default_path(char *buffer, size_t bufsize); |
08d56b1f | 47 | static void http_gnutls_load_crl(void); |
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 | * | |
8072030b | 294 | * @since CUPS 1.5/macOS 10.7@ |
dd332638 MS |
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 | 377 | result = gnutls_x509_crt_check_hostname(cert, common_name) != 0; |
08d56b1f MS |
378 | |
379 | if (result) | |
380 | { | |
381 | int i, /* Looping var */ | |
382 | count; /* Number of revoked certificates */ | |
383 | unsigned char cserial[1024], /* Certificate serial number */ | |
384 | rserial[1024]; /* Revoked serial number */ | |
385 | size_t cserial_size, /* Size of cert serial number */ | |
386 | rserial_size; /* Size of revoked serial number */ | |
387 | ||
388 | _cupsMutexLock(&tls_mutex); | |
389 | ||
390 | count = gnutls_x509_crl_get_crt_count(tls_crl); | |
391 | ||
392 | if (count > 0) | |
393 | { | |
394 | cserial_size = sizeof(cserial); | |
395 | gnutls_x509_crt_get_serial(cert, cserial, &cserial_size); | |
396 | ||
397 | for (i = 0; i < count; i ++) | |
398 | { | |
399 | rserial_size = sizeof(rserial); | |
0eff12fa | 400 | if (!gnutls_x509_crl_get_crt_serial(tls_crl, i, rserial, &rserial_size, NULL) && cserial_size == rserial_size && !memcmp(cserial, rserial, rserial_size)) |
08d56b1f MS |
401 | { |
402 | result = 0; | |
403 | break; | |
404 | } | |
405 | } | |
406 | } | |
407 | ||
408 | _cupsMutexUnlock(&tls_mutex); | |
409 | } | |
410 | ||
ff82e169 | 411 | gnutls_x509_crt_deinit(cert); |
a15960a1 | 412 | } |
a15960a1 | 413 | |
ff82e169 | 414 | return (result); |
a15960a1 MS |
415 | } |
416 | ||
417 | ||
418 | /* | |
419 | * 'httpCredentialsGetTrust()' - Return the trust of credentials. | |
420 | * | |
e1f19878 | 421 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
422 | */ |
423 | ||
424 | http_trust_t /* O - Level of trust */ | |
425 | httpCredentialsGetTrust( | |
426 | cups_array_t *credentials, /* I - Credentials */ | |
427 | const char *common_name) /* I - Common name for trust lookup */ | |
428 | { | |
429 | http_trust_t trust = HTTP_TRUST_OK; | |
430 | /* Trusted? */ | |
ff82e169 | 431 | gnutls_x509_crt_t cert; /* Certificate */ |
a15960a1 MS |
432 | cups_array_t *tcreds = NULL; /* Trusted credentials */ |
433 | _cups_globals_t *cg = _cupsGlobals(); | |
434 | /* Per-thread globals */ | |
435 | ||
436 | ||
437 | if (!common_name) | |
438 | return (HTTP_TRUST_UNKNOWN); | |
439 | ||
ff82e169 | 440 | if ((cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials))) == NULL) |
a15960a1 MS |
441 | return (HTTP_TRUST_UNKNOWN); |
442 | ||
3abb875b | 443 | if (cg->any_root < 0) |
08d56b1f | 444 | { |
3abb875b | 445 | _cupsSetDefaults(); |
08d56b1f MS |
446 | http_gnutls_load_crl(); |
447 | } | |
3abb875b | 448 | |
a15960a1 MS |
449 | /* |
450 | * Look this common name up in the default keychains... | |
451 | */ | |
452 | ||
453 | httpLoadCredentials(NULL, &tcreds, common_name); | |
454 | ||
455 | if (tcreds) | |
456 | { | |
457 | char credentials_str[1024], /* String for incoming credentials */ | |
458 | tcreds_str[1024]; /* String for saved credentials */ | |
459 | ||
460 | httpCredentialsString(credentials, credentials_str, sizeof(credentials_str)); | |
461 | httpCredentialsString(tcreds, tcreds_str, sizeof(tcreds_str)); | |
462 | ||
463 | if (strcmp(credentials_str, tcreds_str)) | |
464 | { | |
465 | /* | |
466 | * Credentials don't match, let's look at the expiration date of the new | |
467 | * credentials and allow if the new ones have a later expiration... | |
468 | */ | |
469 | ||
08d56b1f MS |
470 | if (!cg->trust_first) |
471 | { | |
472 | /* | |
473 | * Do not trust certificates on first use... | |
474 | */ | |
475 | ||
476 | trust = HTTP_TRUST_INVALID; | |
477 | } | |
478 | else if (httpCredentialsGetExpiration(credentials) <= httpCredentialsGetExpiration(tcreds) || !httpCredentialsAreValidForName(credentials, common_name)) | |
a15960a1 MS |
479 | { |
480 | /* | |
481 | * Either the new credentials are not newly issued, or the common name | |
482 | * does not match the issued certificate... | |
483 | */ | |
484 | ||
485 | trust = HTTP_TRUST_INVALID; | |
486 | } | |
487 | else if (httpCredentialsGetExpiration(tcreds) < time(NULL)) | |
488 | { | |
489 | /* | |
490 | * Save the renewed credentials... | |
491 | */ | |
492 | ||
493 | trust = HTTP_TRUST_RENEWED; | |
494 | ||
495 | httpSaveCredentials(NULL, credentials, common_name); | |
496 | } | |
497 | } | |
498 | ||
499 | httpFreeCredentials(tcreds); | |
500 | } | |
501 | else if (cg->validate_certs && !httpCredentialsAreValidForName(credentials, common_name)) | |
502 | trust = HTTP_TRUST_INVALID; | |
503 | ||
ff82e169 MS |
504 | if (trust == HTTP_TRUST_OK && !cg->expired_certs) |
505 | { | |
506 | time_t curtime; /* Current date/time */ | |
507 | ||
508 | time(&curtime); | |
509 | if (curtime < gnutls_x509_crt_get_activation_time(cert) || | |
510 | curtime > gnutls_x509_crt_get_expiration_time(cert)) | |
511 | trust = HTTP_TRUST_EXPIRED; | |
512 | } | |
513 | ||
514 | if (trust == HTTP_TRUST_OK && !cg->any_root && cupsArrayCount(credentials) == 1) | |
a15960a1 MS |
515 | trust = HTTP_TRUST_INVALID; |
516 | ||
ff82e169 | 517 | gnutls_x509_crt_deinit(cert); |
a15960a1 MS |
518 | |
519 | return (trust); | |
520 | } | |
521 | ||
522 | ||
523 | /* | |
524 | * 'httpCredentialsGetExpiration()' - Return the expiration date of the credentials. | |
525 | * | |
e1f19878 | 526 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
527 | */ |
528 | ||
529 | time_t /* O - Expiration date of credentials */ | |
530 | httpCredentialsGetExpiration( | |
531 | cups_array_t *credentials) /* I - Credentials */ | |
532 | { | |
ff82e169 MS |
533 | gnutls_x509_crt_t cert; /* Certificate */ |
534 | time_t result = 0; /* Result */ | |
535 | ||
536 | ||
537 | cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
538 | if (cert) | |
539 | { | |
bdc8d1ad | 540 | result = gnutls_x509_crt_get_expiration_time(cert); |
ff82e169 MS |
541 | gnutls_x509_crt_deinit(cert); |
542 | } | |
a15960a1 | 543 | |
ff82e169 | 544 | return (result); |
a15960a1 MS |
545 | } |
546 | ||
547 | ||
548 | /* | |
549 | * 'httpCredentialsString()' - Return a string representing the credentials. | |
550 | * | |
e1f19878 | 551 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
552 | */ |
553 | ||
554 | size_t /* O - Total size of credentials string */ | |
555 | httpCredentialsString( | |
556 | cups_array_t *credentials, /* I - Credentials */ | |
557 | char *buffer, /* I - Buffer or @code NULL@ */ | |
558 | size_t bufsize) /* I - Size of buffer */ | |
559 | { | |
ff82e169 MS |
560 | http_credential_t *first; /* First certificate */ |
561 | gnutls_x509_crt_t cert; /* Certificate */ | |
562 | ||
563 | ||
a15960a1 MS |
564 | DEBUG_printf(("httpCredentialsString(credentials=%p, buffer=%p, bufsize=" CUPS_LLFMT ")", credentials, buffer, CUPS_LLCAST bufsize)); |
565 | ||
566 | if (!buffer) | |
567 | return (0); | |
568 | ||
569 | if (buffer && bufsize > 0) | |
570 | *buffer = '\0'; | |
571 | ||
a15960a1 | 572 | if ((first = (http_credential_t *)cupsArrayFirst(credentials)) != NULL && |
ff82e169 | 573 | (cert = http_gnutls_create_credential(first)) != NULL) |
a15960a1 | 574 | { |
a15960a1 | 575 | char name[256]; /* Common name associated with cert */ |
bdc8d1ad | 576 | size_t namelen; /* Length of name */ |
a15960a1 MS |
577 | time_t expiration; /* Expiration date of cert */ |
578 | _cups_md5_state_t md5_state; /* MD5 state */ | |
579 | unsigned char md5_digest[16]; /* MD5 result */ | |
580 | ||
bdc8d1ad MS |
581 | namelen = sizeof(name) - 1; |
582 | if (gnutls_x509_crt_get_dn_by_oid(cert, GNUTLS_OID_X520_COMMON_NAME, 0, 0, name, &namelen) >= 0) | |
583 | name[namelen] = '\0'; | |
584 | else | |
a15960a1 MS |
585 | strlcpy(name, "unknown", sizeof(name)); |
586 | ||
ff82e169 | 587 | expiration = gnutls_x509_crt_get_expiration_time(cert); |
a15960a1 MS |
588 | |
589 | _cupsMD5Init(&md5_state); | |
590 | _cupsMD5Append(&md5_state, first->data, (int)first->datalen); | |
591 | _cupsMD5Finish(&md5_state, md5_digest); | |
592 | ||
593 | 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]); | |
594 | ||
ff82e169 | 595 | gnutls_x509_crt_deinit(cert); |
a15960a1 | 596 | } |
a15960a1 MS |
597 | |
598 | DEBUG_printf(("1httpCredentialsString: Returning \"%s\".", buffer)); | |
599 | ||
600 | return (strlen(buffer)); | |
601 | } | |
602 | ||
603 | ||
604 | /* | |
605 | * 'httpLoadCredentials()' - Load X.509 credentials from a keychain file. | |
606 | * | |
e1f19878 | 607 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
608 | */ |
609 | ||
610 | int /* O - 0 on success, -1 on error */ | |
611 | httpLoadCredentials( | |
612 | const char *path, /* I - Keychain/PKCS#12 path */ | |
613 | cups_array_t **credentials, /* IO - Credentials */ | |
614 | const char *common_name) /* I - Common name for credentials */ | |
615 | { | |
ff82e169 MS |
616 | cups_file_t *fp; /* Certificate file */ |
617 | char filename[1024], /* filename.crt */ | |
618 | temp[1024], /* Temporary string */ | |
619 | line[256]; /* Base64-encoded line */ | |
620 | unsigned char *data = NULL; /* Buffer for cert data */ | |
621 | size_t alloc_data = 0, /* Bytes allocated */ | |
622 | num_data = 0; /* Bytes used */ | |
623 | int decoded; /* Bytes decoded */ | |
624 | ||
625 | ||
626 | if (!credentials || !common_name) | |
627 | return (-1); | |
628 | ||
629 | if (!path) | |
630 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
631 | if (!path) | |
632 | return (-1); | |
633 | ||
26435c51 | 634 | http_gnutls_make_path(filename, sizeof(filename), path, common_name, "crt"); |
ff82e169 MS |
635 | |
636 | if ((fp = cupsFileOpen(filename, "r")) == NULL) | |
637 | return (-1); | |
638 | ||
639 | while (cupsFileGets(fp, line, sizeof(line))) | |
640 | { | |
641 | if (!strcmp(line, "-----BEGIN CERTIFICATE-----")) | |
642 | { | |
643 | if (num_data) | |
644 | { | |
645 | /* | |
646 | * Missing END CERTIFICATE... | |
647 | */ | |
648 | ||
649 | httpFreeCredentials(*credentials); | |
650 | *credentials = NULL; | |
651 | break; | |
652 | } | |
653 | } | |
654 | else if (!strcmp(line, "-----END CERTIFICATE-----")) | |
655 | { | |
656 | if (!num_data) | |
657 | { | |
658 | /* | |
659 | * Missing data... | |
660 | */ | |
a15960a1 | 661 | |
ff82e169 MS |
662 | httpFreeCredentials(*credentials); |
663 | *credentials = NULL; | |
664 | break; | |
665 | } | |
666 | ||
667 | if (!*credentials) | |
668 | *credentials = cupsArrayNew(NULL, NULL); | |
669 | ||
670 | if (httpAddCredential(*credentials, data, num_data)) | |
671 | { | |
672 | httpFreeCredentials(*credentials); | |
673 | *credentials = NULL; | |
674 | break; | |
675 | } | |
676 | ||
677 | num_data = 0; | |
678 | } | |
679 | else | |
680 | { | |
681 | if (alloc_data == 0) | |
682 | { | |
683 | data = malloc(2048); | |
684 | alloc_data = 2048; | |
685 | ||
686 | if (!data) | |
687 | break; | |
688 | } | |
689 | else if ((num_data + strlen(line)) >= alloc_data) | |
690 | { | |
691 | unsigned char *tdata = realloc(data, alloc_data + 1024); | |
692 | /* Expanded buffer */ | |
693 | ||
694 | if (!tdata) | |
695 | { | |
696 | httpFreeCredentials(*credentials); | |
697 | *credentials = NULL; | |
698 | break; | |
699 | } | |
700 | ||
701 | data = tdata; | |
702 | alloc_data += 1024; | |
703 | } | |
704 | ||
705 | decoded = alloc_data - num_data; | |
bdc8d1ad MS |
706 | httpDecode64_2((char *)data + num_data, &decoded, line); |
707 | num_data += (size_t)decoded; | |
ff82e169 MS |
708 | } |
709 | } | |
710 | ||
711 | cupsFileClose(fp); | |
712 | ||
713 | if (num_data) | |
714 | { | |
715 | /* | |
716 | * Missing END CERTIFICATE... | |
717 | */ | |
718 | ||
719 | httpFreeCredentials(*credentials); | |
720 | *credentials = NULL; | |
721 | } | |
722 | ||
723 | if (data) | |
724 | free(data); | |
725 | ||
726 | return (*credentials ? 0 : -1); | |
a15960a1 MS |
727 | } |
728 | ||
729 | ||
730 | /* | |
731 | * 'httpSaveCredentials()' - Save X.509 credentials to a keychain file. | |
732 | * | |
e1f19878 | 733 | * @since CUPS 2.0/OS 10.10@ |
a15960a1 MS |
734 | */ |
735 | ||
736 | int /* O - -1 on error, 0 on success */ | |
737 | httpSaveCredentials( | |
738 | const char *path, /* I - Keychain/PKCS#12 path */ | |
739 | cups_array_t *credentials, /* I - Credentials */ | |
740 | const char *common_name) /* I - Common name for credentials */ | |
741 | { | |
ff82e169 MS |
742 | cups_file_t *fp; /* Certificate file */ |
743 | char filename[1024], /* filename.crt */ | |
744 | nfilename[1024],/* filename.crt.N */ | |
745 | temp[1024], /* Temporary string */ | |
bdc8d1ad | 746 | line[256]; /* Base64-encoded line */ |
ff82e169 | 747 | const unsigned char *ptr; /* Pointer into certificate */ |
bdc8d1ad | 748 | ssize_t remaining; /* Bytes left */ |
ff82e169 MS |
749 | http_credential_t *cred; /* Current credential */ |
750 | ||
751 | ||
752 | if (!credentials || !common_name) | |
753 | return (-1); | |
754 | ||
755 | if (!path) | |
756 | path = http_gnutls_default_path(temp, sizeof(temp)); | |
757 | if (!path) | |
758 | return (-1); | |
759 | ||
26435c51 MS |
760 | http_gnutls_make_path(filename, sizeof(filename), path, common_name, "crt"); |
761 | snprintf(nfilename, sizeof(nfilename), "%s.N", filename); | |
ff82e169 MS |
762 | |
763 | if ((fp = cupsFileOpen(nfilename, "w")) == NULL) | |
764 | return (-1); | |
765 | ||
766 | fchmod(cupsFileNumber(fp), 0600); | |
767 | ||
768 | for (cred = (http_credential_t *)cupsArrayFirst(credentials); | |
769 | cred; | |
770 | cred = (http_credential_t *)cupsArrayNext(credentials)) | |
771 | { | |
772 | cupsFilePuts(fp, "-----BEGIN CERTIFICATE-----\n"); | |
bdc8d1ad | 773 | for (ptr = cred->data, remaining = (ssize_t)cred->datalen; remaining > 0; remaining -= 45, ptr += 45) |
ff82e169 | 774 | { |
bdc8d1ad | 775 | httpEncode64_2(line, sizeof(line), (char *)ptr, remaining > 45 ? 45 : remaining); |
ff82e169 MS |
776 | cupsFilePrintf(fp, "%s\n", line); |
777 | } | |
778 | cupsFilePuts(fp, "-----END CERTIFICATE-----\n"); | |
779 | } | |
780 | ||
781 | cupsFileClose(fp); | |
782 | ||
783 | return (rename(nfilename, filename)); | |
784 | } | |
785 | ||
786 | ||
787 | /* | |
788 | * 'http_gnutls_create_credential()' - Create a single credential in the internal format. | |
789 | */ | |
790 | ||
791 | static gnutls_x509_crt_t /* O - Certificate */ | |
792 | http_gnutls_create_credential( | |
793 | http_credential_t *credential) /* I - Credential */ | |
794 | { | |
bdc8d1ad MS |
795 | int result; /* Result from GNU TLS */ |
796 | gnutls_x509_crt_t cert; /* Certificate */ | |
ff82e169 MS |
797 | gnutls_datum_t datum; /* Data record */ |
798 | ||
799 | ||
bdc8d1ad MS |
800 | DEBUG_printf(("3http_gnutls_create_credential(credential=%p)", credential)); |
801 | ||
ff82e169 MS |
802 | if (!credential) |
803 | return (NULL); | |
804 | ||
bdc8d1ad MS |
805 | if ((result = gnutls_x509_crt_init(&cert)) < 0) |
806 | { | |
807 | DEBUG_printf(("4http_gnutls_create_credential: init error: %s", gnutls_strerror(result))); | |
ff82e169 | 808 | return (NULL); |
bdc8d1ad | 809 | } |
ff82e169 | 810 | |
bdc8d1ad MS |
811 | datum.data = credential->data; |
812 | datum.size = credential->datalen; | |
ff82e169 | 813 | |
bdc8d1ad | 814 | if ((result = gnutls_x509_crt_import(cert, &datum, GNUTLS_X509_FMT_DER)) < 0) |
ff82e169 | 815 | { |
bdc8d1ad MS |
816 | DEBUG_printf(("4http_gnutls_create_credential: import error: %s", gnutls_strerror(result))); |
817 | ||
ff82e169 MS |
818 | gnutls_x509_crt_deinit(cert); |
819 | return (NULL); | |
820 | } | |
a15960a1 | 821 | |
ff82e169 | 822 | return (cert); |
a15960a1 MS |
823 | } |
824 | ||
825 | ||
d0facf48 MS |
826 | /* |
827 | * 'http_gnutls_default_path()' - Get the default credential store path. | |
828 | */ | |
829 | ||
830 | static const char * /* O - Path or NULL on error */ | |
831 | http_gnutls_default_path(char *buffer,/* I - Path buffer */ | |
832 | size_t bufsize)/* I - Size of path buffer */ | |
833 | { | |
834 | const char *home = getenv("HOME"); /* HOME environment variable */ | |
835 | ||
836 | ||
837 | if (getuid() && home) | |
838 | { | |
839 | snprintf(buffer, bufsize, "%s/.cups", home); | |
840 | if (access(buffer, 0)) | |
841 | { | |
842 | DEBUG_printf(("1http_gnutls_default_path: Making directory \"%s\".", buffer)); | |
843 | if (mkdir(buffer, 0700)) | |
844 | { | |
845 | DEBUG_printf(("1http_gnutls_default_path: Failed to make directory: %s", strerror(errno))); | |
846 | return (NULL); | |
847 | } | |
848 | } | |
849 | ||
850 | snprintf(buffer, bufsize, "%s/.cups/ssl", home); | |
851 | if (access(buffer, 0)) | |
852 | { | |
853 | DEBUG_printf(("1http_gnutls_default_path: Making directory \"%s\".", buffer)); | |
854 | if (mkdir(buffer, 0700)) | |
855 | { | |
856 | DEBUG_printf(("1http_gnutls_default_path: Failed to make directory: %s", strerror(errno))); | |
857 | return (NULL); | |
858 | } | |
859 | } | |
860 | } | |
861 | else | |
862 | strlcpy(buffer, CUPS_SERVERROOT "/ssl", bufsize); | |
863 | ||
864 | DEBUG_printf(("1http_gnutls_default_path: Using default path \"%s\".", buffer)); | |
865 | ||
866 | return (buffer); | |
867 | } | |
868 | ||
869 | ||
08d56b1f MS |
870 | /* |
871 | * 'http_gnutls_load_crl()' - Load the certificate revocation list, if any. | |
872 | */ | |
873 | ||
874 | static void | |
875 | http_gnutls_load_crl(void) | |
876 | { | |
877 | _cupsMutexLock(&tls_mutex); | |
878 | ||
879 | if (!gnutls_x509_crl_init(&tls_crl)) | |
880 | { | |
881 | cups_file_t *fp; /* CRL file */ | |
882 | char filename[1024], /* site.crl */ | |
883 | line[256]; /* Base64-encoded line */ | |
884 | unsigned char *data = NULL; /* Buffer for cert data */ | |
885 | size_t alloc_data = 0, /* Bytes allocated */ | |
886 | num_data = 0; /* Bytes used */ | |
887 | int decoded; /* Bytes decoded */ | |
888 | gnutls_datum_t datum; /* Data record */ | |
889 | ||
890 | ||
891 | http_gnutls_make_path(filename, sizeof(filename), CUPS_SERVERROOT, "site", "crl"); | |
892 | ||
893 | if ((fp = cupsFileOpen(filename, "r")) != NULL) | |
894 | { | |
895 | while (cupsFileGets(fp, line, sizeof(line))) | |
896 | { | |
897 | if (!strcmp(line, "-----BEGIN X509 CRL-----")) | |
898 | { | |
899 | if (num_data) | |
900 | { | |
901 | /* | |
902 | * Missing END X509 CRL... | |
903 | */ | |
904 | ||
905 | break; | |
906 | } | |
907 | } | |
908 | else if (!strcmp(line, "-----END X509 CRL-----")) | |
909 | { | |
910 | if (!num_data) | |
911 | { | |
912 | /* | |
913 | * Missing data... | |
914 | */ | |
915 | ||
916 | break; | |
917 | } | |
918 | ||
919 | datum.data = data; | |
920 | datum.size = num_data; | |
921 | ||
0eff12fa | 922 | gnutls_x509_crl_import(tls_crl, &datum, GNUTLS_X509_FMT_PEM); |
08d56b1f MS |
923 | |
924 | num_data = 0; | |
925 | } | |
926 | else | |
927 | { | |
928 | if (alloc_data == 0) | |
929 | { | |
930 | data = malloc(2048); | |
931 | alloc_data = 2048; | |
932 | ||
933 | if (!data) | |
934 | break; | |
935 | } | |
936 | else if ((num_data + strlen(line)) >= alloc_data) | |
937 | { | |
938 | unsigned char *tdata = realloc(data, alloc_data + 1024); | |
939 | /* Expanded buffer */ | |
940 | ||
941 | if (!tdata) | |
08d56b1f | 942 | break; |
08d56b1f MS |
943 | |
944 | data = tdata; | |
945 | alloc_data += 1024; | |
946 | } | |
947 | ||
948 | decoded = alloc_data - num_data; | |
949 | httpDecode64_2((char *)data + num_data, &decoded, line); | |
950 | num_data += (size_t)decoded; | |
951 | } | |
952 | } | |
953 | ||
954 | cupsFileClose(fp); | |
955 | ||
956 | if (data) | |
957 | free(data); | |
958 | } | |
959 | } | |
960 | ||
961 | _cupsMutexUnlock(&tls_mutex); | |
962 | } | |
963 | ||
964 | ||
26435c51 MS |
965 | /* |
966 | * 'http_gnutls_make_path()' - Format a filename for a certificate or key file. | |
967 | */ | |
968 | ||
969 | static const char * /* O - Filename */ | |
970 | http_gnutls_make_path( | |
971 | char *buffer, /* I - Filename buffer */ | |
972 | size_t bufsize, /* I - Size of buffer */ | |
973 | const char *dirname, /* I - Directory */ | |
974 | const char *filename, /* I - Filename (usually hostname) */ | |
975 | const char *ext) /* I - Extension */ | |
976 | { | |
977 | char *bufptr, /* Pointer into buffer */ | |
978 | *bufend = buffer + bufsize - 1; /* End of buffer */ | |
979 | ||
980 | ||
981 | snprintf(buffer, bufsize, "%s/", dirname); | |
982 | bufptr = buffer + strlen(buffer); | |
983 | ||
984 | while (*filename && bufptr < bufend) | |
985 | { | |
986 | if (_cups_isalnum(*filename) || *filename == '-' || *filename == '.') | |
987 | *bufptr++ = *filename; | |
988 | else | |
989 | *bufptr++ = '_'; | |
990 | ||
991 | filename ++; | |
992 | } | |
993 | ||
994 | if (bufptr < bufend) | |
995 | *bufptr++ = '.'; | |
996 | ||
a2751f30 | 997 | strlcpy(bufptr, ext, (size_t)(bufend - bufptr + 1)); |
26435c51 MS |
998 | |
999 | return (buffer); | |
1000 | } | |
1001 | ||
1002 | ||
dd332638 MS |
1003 | /* |
1004 | * 'http_gnutls_read()' - Read function for the GNU TLS library. | |
1005 | */ | |
1006 | ||
1007 | static ssize_t /* O - Number of bytes read or -1 on error */ | |
1008 | http_gnutls_read( | |
1009 | gnutls_transport_ptr_t ptr, /* I - Connection to server */ | |
1010 | void *data, /* I - Buffer */ | |
1011 | size_t length) /* I - Number of bytes to read */ | |
1012 | { | |
1013 | http_t *http; /* HTTP connection */ | |
1014 | ssize_t bytes; /* Bytes read */ | |
1015 | ||
1016 | ||
1017 | DEBUG_printf(("6http_gnutls_read(ptr=%p, data=%p, length=%d)", ptr, data, (int)length)); | |
1018 | ||
1019 | http = (http_t *)ptr; | |
1020 | ||
1021 | if (!http->blocking) | |
1022 | { | |
1023 | /* | |
1024 | * Make sure we have data before we read... | |
1025 | */ | |
1026 | ||
1027 | while (!_httpWait(http, http->wait_value, 0)) | |
1028 | { | |
1029 | if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) | |
1030 | continue; | |
1031 | ||
1032 | http->error = ETIMEDOUT; | |
1033 | return (-1); | |
1034 | } | |
1035 | } | |
1036 | ||
1037 | bytes = recv(http->fd, data, length, 0); | |
1038 | DEBUG_printf(("6http_gnutls_read: bytes=%d", (int)bytes)); | |
1039 | return (bytes); | |
1040 | } | |
1041 | ||
1042 | ||
1043 | /* | |
1044 | * 'http_gnutls_write()' - Write function for the GNU TLS library. | |
1045 | */ | |
1046 | ||
1047 | static ssize_t /* O - Number of bytes written or -1 on error */ | |
1048 | http_gnutls_write( | |
1049 | gnutls_transport_ptr_t ptr, /* I - Connection to server */ | |
1050 | const void *data, /* I - Data buffer */ | |
1051 | size_t length) /* I - Number of bytes to write */ | |
1052 | { | |
1053 | ssize_t bytes; /* Bytes written */ | |
1054 | ||
1055 | ||
1056 | DEBUG_printf(("6http_gnutls_write(ptr=%p, data=%p, length=%d)", ptr, data, | |
1057 | (int)length)); | |
dd332638 MS |
1058 | bytes = send(((http_t *)ptr)->fd, data, length, 0); |
1059 | DEBUG_printf(("http_gnutls_write: bytes=%d", (int)bytes)); | |
1060 | ||
1061 | return (bytes); | |
1062 | } | |
2c85b752 MS |
1063 | |
1064 | ||
1065 | /* | |
172bdf5d | 1066 | * '_httpTLSInitialize()' - Initialize the TLS stack. |
2c85b752 MS |
1067 | */ |
1068 | ||
172bdf5d MS |
1069 | void |
1070 | _httpTLSInitialize(void) | |
2c85b752 | 1071 | { |
2c85b752 MS |
1072 | /* |
1073 | * Initialize GNU TLS... | |
1074 | */ | |
1075 | ||
1076 | gnutls_global_init(); | |
dd332638 | 1077 | } |
2c85b752 | 1078 | |
2c85b752 | 1079 | |
dd332638 | 1080 | /* |
172bdf5d | 1081 | * '_httpTLSPending()' - Return the number of pending TLS-encrypted bytes. |
dd332638 | 1082 | */ |
2c85b752 | 1083 | |
172bdf5d MS |
1084 | size_t /* O - Bytes available */ |
1085 | _httpTLSPending(http_t *http) /* I - HTTP connection */ | |
dd332638 MS |
1086 | { |
1087 | return (gnutls_record_check_pending(http->tls)); | |
2c85b752 MS |
1088 | } |
1089 | ||
1090 | ||
2c85b752 | 1091 | /* |
172bdf5d | 1092 | * '_httpTLSRead()' - Read from a SSL/TLS connection. |
2c85b752 MS |
1093 | */ |
1094 | ||
172bdf5d MS |
1095 | int /* O - Bytes read */ |
1096 | _httpTLSRead(http_t *http, /* I - Connection to server */ | |
1097 | char *buf, /* I - Buffer to store data */ | |
1098 | int len) /* I - Length of buffer */ | |
2c85b752 | 1099 | { |
2c85b752 MS |
1100 | ssize_t result; /* Return value */ |
1101 | ||
1102 | ||
07623986 | 1103 | result = gnutls_record_recv(http->tls, buf, (size_t)len); |
2c85b752 MS |
1104 | |
1105 | if (result < 0 && !errno) | |
1106 | { | |
1107 | /* | |
1108 | * Convert GNU TLS error to errno value... | |
1109 | */ | |
1110 | ||
1111 | switch (result) | |
1112 | { | |
1113 | case GNUTLS_E_INTERRUPTED : | |
1114 | errno = EINTR; | |
1115 | break; | |
1116 | ||
1117 | case GNUTLS_E_AGAIN : | |
1118 | errno = EAGAIN; | |
1119 | break; | |
1120 | ||
1121 | default : | |
1122 | errno = EPIPE; | |
1123 | break; | |
1124 | } | |
1125 | ||
1126 | result = -1; | |
1127 | } | |
1128 | ||
1129 | return ((int)result); | |
dd332638 | 1130 | } |
2c85b752 MS |
1131 | |
1132 | ||
dd332638 | 1133 | /* |
172bdf5d | 1134 | * '_httpTLSSetCredentials()' - Set the TLS credentials. |
dd332638 | 1135 | */ |
2c85b752 | 1136 | |
172bdf5d MS |
1137 | int /* O - Status of connection */ |
1138 | _httpTLSSetCredentials(http_t *http) /* I - Connection to server */ | |
dd332638 MS |
1139 | { |
1140 | (void)http; | |
2c85b752 | 1141 | |
dd332638 | 1142 | return (0); |
2c85b752 | 1143 | } |
2c85b752 MS |
1144 | |
1145 | ||
63aefcd5 MS |
1146 | /* |
1147 | * '_httpTLSSetOptions()' - Set TLS protocol and cipher suite options. | |
1148 | */ | |
1149 | ||
1150 | void | |
1151 | _httpTLSSetOptions(int options) /* I - Options */ | |
1152 | { | |
1153 | tls_options = options; | |
1154 | } | |
1155 | ||
1156 | ||
2c85b752 | 1157 | /* |
172bdf5d | 1158 | * '_httpTLSStart()' - Set up SSL/TLS support on a connection. |
2c85b752 MS |
1159 | */ |
1160 | ||
172bdf5d MS |
1161 | int /* O - 0 on success, -1 on failure */ |
1162 | _httpTLSStart(http_t *http) /* I - Connection to server */ | |
2c85b752 MS |
1163 | { |
1164 | char hostname[256], /* Hostname */ | |
1165 | *hostptr; /* Pointer into hostname */ | |
2c85b752 | 1166 | int status; /* Status of handshake */ |
172bdf5d | 1167 | gnutls_certificate_credentials_t *credentials; |
2c85b752 | 1168 | /* TLS credentials */ |
ee6226a5 MS |
1169 | char priority_string[1024]; |
1170 | /* Priority string */ | |
2c85b752 MS |
1171 | |
1172 | ||
b37d45d9 MS |
1173 | DEBUG_printf(("3_httpTLSStart(http=%p)", http)); |
1174 | ||
1175 | if (tls_options < 0) | |
1176 | { | |
1177 | DEBUG_puts("4_httpTLSStart: Setting defaults."); | |
1178 | _cupsSetDefaults(); | |
1179 | DEBUG_printf(("4_httpTLSStart: tls_options=%x", tls_options)); | |
1180 | } | |
2c85b752 | 1181 | |
172bdf5d | 1182 | if (http->mode == _HTTP_MODE_SERVER && !tls_keypath) |
2c85b752 | 1183 | { |
172bdf5d MS |
1184 | DEBUG_puts("4_httpTLSStart: cupsSetServerCredentials not called."); |
1185 | http->error = errno = EINVAL; | |
1186 | http->status = HTTP_STATUS_ERROR; | |
1187 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Server credentials not set."), 1); | |
2c85b752 | 1188 | |
172bdf5d | 1189 | return (-1); |
2c85b752 MS |
1190 | } |
1191 | ||
172bdf5d MS |
1192 | credentials = (gnutls_certificate_credentials_t *) |
1193 | malloc(sizeof(gnutls_certificate_credentials_t)); | |
2c85b752 MS |
1194 | if (credentials == NULL) |
1195 | { | |
172bdf5d | 1196 | DEBUG_printf(("8_httpStartTLS: Unable to allocate credentials: %s", |
2c85b752 MS |
1197 | strerror(errno))); |
1198 | http->error = errno; | |
1199 | http->status = HTTP_STATUS_ERROR; | |
1200 | _cupsSetHTTPError(HTTP_STATUS_ERROR); | |
1201 | ||
1202 | return (-1); | |
1203 | } | |
1204 | ||
1205 | gnutls_certificate_allocate_credentials(credentials); | |
d0facf48 | 1206 | status = gnutls_init(&http->tls, http->mode == _HTTP_MODE_CLIENT ? GNUTLS_CLIENT : GNUTLS_SERVER); |
d0facf48 | 1207 | if (!status) |
005f7f1f | 1208 | status = gnutls_set_default_priority(http->tls); |
d0facf48 MS |
1209 | |
1210 | if (status) | |
1211 | { | |
1212 | http->error = EIO; | |
1213 | http->status = HTTP_STATUS_ERROR; | |
1214 | ||
1215 | DEBUG_printf(("4_httpTLSStart: Unable to initialize common TLS parameters: %s", gnutls_strerror(status))); | |
1216 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1217 | ||
1218 | gnutls_deinit(http->tls); | |
1219 | gnutls_certificate_free_credentials(*credentials); | |
1220 | free(credentials); | |
1221 | http->tls = NULL; | |
1222 | ||
1223 | return (-1); | |
1224 | } | |
2c85b752 | 1225 | |
f394e0f7 | 1226 | if (http->mode == _HTTP_MODE_CLIENT) |
172bdf5d MS |
1227 | { |
1228 | /* | |
1229 | * Client: get the hostname to use for TLS... | |
1230 | */ | |
1231 | ||
1232 | if (httpAddrLocalhost(http->hostaddr)) | |
1233 | { | |
1234 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
1235 | } | |
1236 | else | |
1237 | { | |
1238 | /* | |
1239 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
1240 | */ | |
1241 | ||
1242 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
1243 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
1244 | *hostptr == '.') | |
1245 | *hostptr = '\0'; | |
1246 | } | |
1247 | ||
d0facf48 | 1248 | status = gnutls_server_name_set(http->tls, GNUTLS_NAME_DNS, hostname, strlen(hostname)); |
172bdf5d MS |
1249 | } |
1250 | else | |
1251 | { | |
1252 | /* | |
1253 | * Server: get certificate and private key... | |
1254 | */ | |
1255 | ||
1256 | char crtfile[1024], /* Certificate file */ | |
1257 | keyfile[1024]; /* Private key file */ | |
1258 | int have_creds = 0; /* Have credentials? */ | |
1259 | ||
172bdf5d MS |
1260 | if (http->fields[HTTP_FIELD_HOST][0]) |
1261 | { | |
1262 | /* | |
1263 | * Use hostname for TLS upgrade... | |
1264 | */ | |
1265 | ||
1266 | strlcpy(hostname, http->fields[HTTP_FIELD_HOST], sizeof(hostname)); | |
1267 | } | |
1268 | else | |
1269 | { | |
1270 | /* | |
1271 | * Resolve hostname from connection address... | |
1272 | */ | |
1273 | ||
1274 | http_addr_t addr; /* Connection address */ | |
1275 | socklen_t addrlen; /* Length of address */ | |
1276 | ||
1277 | addrlen = sizeof(addr); | |
1278 | if (getsockname(http->fd, (struct sockaddr *)&addr, &addrlen)) | |
1279 | { | |
1280 | DEBUG_printf(("4_httpTLSStart: Unable to get socket address: %s", strerror(errno))); | |
1281 | hostname[0] = '\0'; | |
1282 | } | |
1283 | else if (httpAddrLocalhost(&addr)) | |
1284 | hostname[0] = '\0'; | |
1285 | else | |
1286 | { | |
1287 | httpAddrLookup(&addr, hostname, sizeof(hostname)); | |
1288 | DEBUG_printf(("4_httpTLSStart: Resolved socket address to \"%s\".", hostname)); | |
1289 | } | |
1290 | } | |
1291 | ||
1292 | if (isdigit(hostname[0] & 255) || hostname[0] == '[') | |
1293 | hostname[0] = '\0'; /* Don't allow numeric addresses */ | |
1294 | ||
1295 | if (hostname[0]) | |
1296 | { | |
9e5e2cef MS |
1297 | /* |
1298 | * First look for CA certs... | |
1299 | */ | |
1300 | ||
1301 | snprintf(crtfile, sizeof(crtfile), "/etc/letsencrypt/live/%s/fullchain.pem", hostname); | |
1302 | snprintf(keyfile, sizeof(keyfile), "/etc/letsencrypt/live/%s/privkey.pem", hostname); | |
1303 | ||
1304 | if ((access(crtfile, R_OK) || access(keyfile, R_OK)) && (hostptr = strchr(hostname, '.')) != NULL) | |
1305 | { | |
1306 | /* | |
1307 | * Try just domain name... | |
1308 | */ | |
1309 | ||
1310 | hostptr ++; | |
1311 | if (strchr(hostptr, '.')) | |
1312 | { | |
1313 | snprintf(crtfile, sizeof(crtfile), "/etc/letsencrypt/live/%s/fullchain.pem", hostptr); | |
1314 | snprintf(keyfile, sizeof(keyfile), "/etc/letsencrypt/live/%s/privkey.pem", hostptr); | |
1315 | } | |
1316 | } | |
1317 | ||
1318 | if (access(crtfile, R_OK) || access(keyfile, R_OK)) | |
1319 | { | |
1320 | /* | |
1321 | * Then look in the CUPS keystore... | |
1322 | */ | |
1323 | ||
1324 | http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, hostname, "crt"); | |
1325 | http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, hostname, "key"); | |
1326 | } | |
172bdf5d | 1327 | |
9e5e2cef | 1328 | have_creds = !access(crtfile, R_OK) && !access(keyfile, R_OK); |
172bdf5d MS |
1329 | } |
1330 | else if (tls_common_name) | |
1331 | { | |
9e5e2cef MS |
1332 | /* |
1333 | * First look for CA certs... | |
1334 | */ | |
1335 | ||
1336 | snprintf(crtfile, sizeof(crtfile), "/etc/letsencrypt/live/%s/fullchain.pem", tls_common_name); | |
1337 | snprintf(keyfile, sizeof(keyfile), "/etc/letsencrypt/live/%s/privkey.pem", tls_common_name); | |
1338 | ||
1339 | if ((access(crtfile, R_OK) || access(keyfile, R_OK)) && (hostptr = strchr(tls_common_name, '.')) != NULL) | |
1340 | { | |
1341 | /* | |
1342 | * Try just domain name... | |
1343 | */ | |
1344 | ||
1345 | hostptr ++; | |
1346 | if (strchr(hostptr, '.')) | |
1347 | { | |
1348 | snprintf(crtfile, sizeof(crtfile), "/etc/letsencrypt/live/%s/fullchain.pem", hostptr); | |
1349 | snprintf(keyfile, sizeof(keyfile), "/etc/letsencrypt/live/%s/privkey.pem", hostptr); | |
1350 | } | |
1351 | } | |
1352 | ||
1353 | if (access(crtfile, R_OK) || access(keyfile, R_OK)) | |
1354 | { | |
1355 | /* | |
1356 | * Then look in the CUPS keystore... | |
1357 | */ | |
1358 | ||
1359 | http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, tls_common_name, "crt"); | |
1360 | http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, tls_common_name, "key"); | |
1361 | } | |
172bdf5d | 1362 | |
9e5e2cef | 1363 | have_creds = !access(crtfile, R_OK) && !access(keyfile, R_OK); |
172bdf5d MS |
1364 | } |
1365 | ||
1366 | if (!have_creds && tls_auto_create && (hostname[0] || tls_common_name)) | |
1367 | { | |
1368 | DEBUG_printf(("4_httpTLSStart: Auto-create credentials for \"%s\".", hostname[0] ? hostname : tls_common_name)); | |
1369 | ||
1370 | if (!cupsMakeServerCredentials(tls_keypath, hostname[0] ? hostname : tls_common_name, 0, NULL, time(NULL) + 365 * 86400)) | |
1371 | { | |
1372 | DEBUG_puts("4_httpTLSStart: cupsMakeServerCredentials failed."); | |
1373 | http->error = errno = EINVAL; | |
1374 | http->status = HTTP_STATUS_ERROR; | |
1375 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unable to create server credentials."), 1); | |
1376 | ||
1377 | return (-1); | |
1378 | } | |
1379 | } | |
1380 | ||
d0facf48 MS |
1381 | DEBUG_printf(("4_httpTLSStart: Using certificate \"%s\" and private key \"%s\".", crtfile, keyfile)); |
1382 | ||
9e5e2cef MS |
1383 | if (!status) |
1384 | status = gnutls_certificate_set_x509_key_file(*credentials, crtfile, keyfile, GNUTLS_X509_FMT_PEM); | |
d0facf48 MS |
1385 | } |
1386 | ||
1387 | if (!status) | |
1388 | status = gnutls_credentials_set(http->tls, GNUTLS_CRD_CERTIFICATE, *credentials); | |
1389 | ||
1390 | if (status) | |
1391 | { | |
1392 | http->error = EIO; | |
1393 | http->status = HTTP_STATUS_ERROR; | |
1394 | ||
1395 | DEBUG_printf(("4_httpTLSStart: Unable to complete client/server setup: %s", gnutls_strerror(status))); | |
1396 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1397 | ||
1398 | gnutls_deinit(http->tls); | |
1399 | gnutls_certificate_free_credentials(*credentials); | |
1400 | free(credentials); | |
1401 | http->tls = NULL; | |
1402 | ||
1403 | return (-1); | |
172bdf5d MS |
1404 | } |
1405 | ||
838bcb92 MS |
1406 | strlcpy(priority_string, "NORMAL", sizeof(priority_string)); |
1407 | ||
1408 | if (tls_options & _HTTP_TLS_DENY_TLS10) | |
1409 | strlcat(priority_string, ":+VERS-TLS-ALL:-VERS-TLS1.0:-VERS-SSL3.0", sizeof(priority_string)); | |
1410 | else if (tls_options & _HTTP_TLS_ALLOW_SSL3) | |
1411 | strlcat(priority_string, ":+VERS-TLS-ALL", sizeof(priority_string)); | |
63aefcd5 | 1412 | else |
838bcb92 | 1413 | strlcat(priority_string, ":+VERS-TLS-ALL:-VERS-SSL3.0", sizeof(priority_string)); |
ee6226a5 | 1414 | |
838bcb92 MS |
1415 | if (!(tls_options & _HTTP_TLS_ALLOW_RC4)) |
1416 | strlcat(priority_string, ":-ARCFOUR-128", sizeof(priority_string)); | |
ee6226a5 | 1417 | |
838bcb92 | 1418 | if (!(tls_options & _HTTP_TLS_ALLOW_DH)) |
72aa7cb4 | 1419 | strlcat(priority_string, ":!ANON-DH", sizeof(priority_string)); |
ee6226a5 | 1420 | |
ee6226a5 MS |
1421 | #ifdef HAVE_GNUTLS_PRIORITY_SET_DIRECT |
1422 | gnutls_priority_set_direct(http->tls, priority_string, NULL); | |
63aefcd5 | 1423 | |
19ba6878 MS |
1424 | #else |
1425 | gnutls_priority_t priority; /* Priority */ | |
1426 | ||
ee6226a5 | 1427 | gnutls_priority_init(&priority, priority_string, NULL); |
19ba6878 MS |
1428 | gnutls_priority_set(http->tls, priority); |
1429 | gnutls_priority_deinit(priority); | |
1430 | #endif /* HAVE_GNUTLS_PRIORITY_SET_DIRECT */ | |
1431 | ||
d0facf48 MS |
1432 | gnutls_transport_set_ptr(http->tls, (gnutls_transport_ptr_t)http); |
1433 | gnutls_transport_set_pull_function(http->tls, http_gnutls_read); | |
e7312eb4 | 1434 | #ifdef HAVE_GNUTLS_TRANSPORT_SET_PULL_TIMEOUT_FUNCTION |
d0facf48 | 1435 | gnutls_transport_set_pull_timeout_function(http->tls, (gnutls_pull_timeout_func)httpWait); |
e7312eb4 | 1436 | #endif /* HAVE_GNUTLS_TRANSPORT_SET_PULL_TIMEOUT_FUNCTION */ |
d0facf48 MS |
1437 | gnutls_transport_set_push_function(http->tls, http_gnutls_write); |
1438 | ||
2c85b752 MS |
1439 | while ((status = gnutls_handshake(http->tls)) != GNUTLS_E_SUCCESS) |
1440 | { | |
d0facf48 | 1441 | DEBUG_printf(("5_httpStartTLS: gnutls_handshake returned %d (%s)", |
2c85b752 MS |
1442 | status, gnutls_strerror(status))); |
1443 | ||
1444 | if (gnutls_error_is_fatal(status)) | |
1445 | { | |
1446 | http->error = EIO; | |
1447 | http->status = HTTP_STATUS_ERROR; | |
1448 | ||
1449 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); | |
1450 | ||
1451 | gnutls_deinit(http->tls); | |
1452 | gnutls_certificate_free_credentials(*credentials); | |
1453 | free(credentials); | |
1454 | http->tls = NULL; | |
1455 | ||
1456 | return (-1); | |
1457 | } | |
1458 | } | |
1459 | ||
1460 | http->tls_credentials = credentials; | |
1461 | ||
2c85b752 MS |
1462 | return (0); |
1463 | } | |
1464 | ||
1465 | ||
1466 | /* | |
172bdf5d | 1467 | * '_httpTLSStop()' - Shut down SSL/TLS on a connection. |
2c85b752 MS |
1468 | */ |
1469 | ||
172bdf5d MS |
1470 | void |
1471 | _httpTLSStop(http_t *http) /* I - Connection to server */ | |
2c85b752 | 1472 | { |
172bdf5d MS |
1473 | int error; /* Error code */ |
1474 | ||
2c85b752 | 1475 | |
f394e0f7 | 1476 | error = gnutls_bye(http->tls, http->mode == _HTTP_MODE_CLIENT ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR); |
172bdf5d | 1477 | if (error != GNUTLS_E_SUCCESS) |
f394e0f7 | 1478 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(errno), 0); |
2c85b752 | 1479 | |
2c85b752 | 1480 | gnutls_deinit(http->tls); |
172bdf5d MS |
1481 | http->tls = NULL; |
1482 | ||
d0facf48 MS |
1483 | if (http->tls_credentials) |
1484 | { | |
1485 | gnutls_certificate_free_credentials(*(http->tls_credentials)); | |
1486 | free(http->tls_credentials); | |
1487 | http->tls_credentials = NULL; | |
1488 | } | |
2c85b752 | 1489 | } |
2c85b752 MS |
1490 | |
1491 | ||
2c85b752 | 1492 | /* |
172bdf5d | 1493 | * '_httpTLSWrite()' - Write to a SSL/TLS connection. |
2c85b752 MS |
1494 | */ |
1495 | ||
172bdf5d MS |
1496 | int /* O - Bytes written */ |
1497 | _httpTLSWrite(http_t *http, /* I - Connection to server */ | |
1498 | const char *buf, /* I - Buffer holding data */ | |
1499 | int len) /* I - Length of buffer */ | |
2c85b752 MS |
1500 | { |
1501 | ssize_t result; /* Return value */ | |
1502 | ||
1503 | ||
1504 | DEBUG_printf(("2http_write_ssl(http=%p, buf=%p, len=%d)", http, buf, len)); | |
1505 | ||
07623986 | 1506 | result = gnutls_record_send(http->tls, buf, (size_t)len); |
2c85b752 MS |
1507 | |
1508 | if (result < 0 && !errno) | |
1509 | { | |
1510 | /* | |
1511 | * Convert GNU TLS error to errno value... | |
1512 | */ | |
1513 | ||
1514 | switch (result) | |
1515 | { | |
1516 | case GNUTLS_E_INTERRUPTED : | |
1517 | errno = EINTR; | |
1518 | break; | |
1519 | ||
1520 | case GNUTLS_E_AGAIN : | |
1521 | errno = EAGAIN; | |
1522 | break; | |
1523 | ||
1524 | default : | |
1525 | errno = EPIPE; | |
1526 | break; | |
1527 | } | |
1528 | ||
1529 | result = -1; | |
1530 | } | |
1531 | ||
2c85b752 MS |
1532 | DEBUG_printf(("3http_write_ssl: Returning %d.", (int)result)); |
1533 | ||
1534 | return ((int)result); | |
1535 | } |