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1a18c85c | 1 | /* |
b9367124 | 2 | * "$Id: tls-darwin.c 12159 2014-09-23 14:56:14Z msweet $" |
1a18c85c MS |
3 | * |
4 | * TLS support code for CUPS on OS X. | |
5 | * | |
6 | * Copyright 2007-2014 by Apple Inc. | |
7 | * Copyright 1997-2007 by Easy Software Products, all rights reserved. | |
8 | * | |
9 | * These coded instructions, statements, and computer programs are the | |
10 | * property of Apple Inc. and are protected by Federal copyright | |
11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
12 | * which should have been included with this file. If this file is | |
13 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
14 | * | |
15 | * This file is subject to the Apple OS-Developed Software exception. | |
16 | */ | |
17 | ||
b9367124 | 18 | /**** This file is included from tls.c ****/ |
1a18c85c MS |
19 | |
20 | /* | |
21 | * Include necessary headers... | |
22 | */ | |
23 | ||
24 | #include <spawn.h> | |
25 | ||
26 | extern char **environ; | |
27 | ||
28 | ||
29 | /* | |
30 | * Local globals... | |
31 | */ | |
32 | ||
33 | #ifdef HAVE_SECKEYCHAINOPEN | |
34 | static int tls_auto_create = 0; | |
35 | /* Auto-create self-signed certs? */ | |
36 | static char *tls_common_name = NULL; | |
37 | /* Default common name */ | |
38 | static SecKeychainRef tls_keychain = NULL; | |
39 | /* Server cert keychain */ | |
40 | static char *tls_keypath = NULL; | |
41 | /* Server cert keychain path */ | |
42 | static _cups_mutex_t tls_mutex = _CUPS_MUTEX_INITIALIZER; | |
43 | /* Mutex for keychain/certs */ | |
44 | #endif /* HAVE_SECKEYCHAINOPEN */ | |
45 | ||
46 | ||
47 | /* | |
48 | * Local functions... | |
49 | */ | |
50 | ||
51 | #ifdef HAVE_SECKEYCHAINOPEN | |
52 | static CFArrayRef http_cdsa_copy_server(const char *common_name); | |
53 | #endif /* HAVE_SECKEYCHAINOPEN */ | |
54 | static SecCertificateRef http_cdsa_create_credential(http_credential_t *credential); | |
55 | static const char *http_cdsa_default_path(char *buffer, size_t bufsize); | |
56 | static OSStatus http_cdsa_read(SSLConnectionRef connection, void *data, size_t *dataLength); | |
57 | static int http_cdsa_set_credentials(http_t *http); | |
58 | static OSStatus http_cdsa_write(SSLConnectionRef connection, const void *data, size_t *dataLength); | |
59 | ||
60 | ||
61 | /* | |
62 | * 'cupsMakeServerCredentials()' - Make a self-signed certificate and private key pair. | |
63 | * | |
5d2cc5d3 | 64 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
65 | */ |
66 | ||
67 | int /* O - 1 on success, 0 on failure */ | |
68 | cupsMakeServerCredentials( | |
69 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
70 | const char *common_name, /* I - Common name */ | |
71 | int num_alt_names, /* I - Number of subject alternate names */ | |
72 | const char **alt_names, /* I - Subject Alternate Names */ | |
73 | time_t expiration_date) /* I - Expiration date */ | |
74 | { | |
75 | #if defined(HAVE_SECGENERATESELFSIGNEDCERTIFICATE) && defined(HAVE_SECKEYCHAINOPEN) | |
76 | char filename[1024]; /* Default keychain path */ | |
77 | int status = 0; /* Return status */ | |
78 | OSStatus err; /* Error code (if any) */ | |
79 | CFStringRef cfcommon_name = NULL; | |
80 | /* CF string for server name */ | |
81 | SecIdentityRef ident = NULL; /* Identity */ | |
82 | SecKeyRef publicKey = NULL, | |
83 | /* Public key */ | |
84 | privateKey = NULL; | |
85 | /* Private key */ | |
86 | CFMutableDictionaryRef keyParams = NULL; | |
87 | /* Key generation parameters */ | |
88 | ||
89 | ||
90 | 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)); | |
91 | ||
92 | (void)num_alt_names; | |
93 | (void)alt_names; | |
94 | (void)expiration_date; | |
95 | ||
96 | if (!path) | |
97 | path = http_cdsa_default_path(filename, sizeof(filename)); | |
98 | ||
99 | cfcommon_name = CFStringCreateWithCString(kCFAllocatorDefault, common_name, kCFStringEncodingUTF8); | |
100 | if (!cfcommon_name) | |
101 | goto cleanup; | |
102 | ||
103 | /* | |
104 | * Create a public/private key pair... | |
105 | */ | |
106 | ||
107 | keyParams = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks); | |
108 | if (!keyParams) | |
109 | goto cleanup; | |
110 | ||
111 | CFDictionaryAddValue(keyParams, kSecAttrKeyType, kSecAttrKeyTypeRSA); | |
112 | CFDictionaryAddValue(keyParams, kSecAttrKeySizeInBits, CFSTR("2048")); | |
113 | CFDictionaryAddValue(keyParams, kSecAttrLabel, CFSTR("CUPS Self-Signed Certificate")); | |
114 | ||
115 | err = SecKeyGeneratePair(keyParams, &publicKey, &privateKey); | |
116 | if (err != noErr) | |
117 | goto cleanup; | |
118 | ||
119 | /* | |
120 | * Create a self-signed certificate using the public/private key pair... | |
121 | */ | |
122 | ||
123 | CFIndex usageInt = kSecKeyUsageAll; | |
124 | CFNumberRef usage = CFNumberCreate(alloc, kCFNumberCFIndexType, &usageInt); | |
125 | CFDictionaryRef certParams = CFDictionaryCreateMutable(kCFAllocatorDefault, | |
126 | kSecCSRBasicContraintsPathLen, CFINT(0), kSecSubjectAltName, cfcommon_name, kSecCertificateKeyUsage, usage, NULL, NULL); | |
127 | CFRelease(usage); | |
128 | ||
129 | const void *ca_o[] = { kSecOidOrganization, CFSTR("") }; | |
130 | const void *ca_cn[] = { kSecOidCommonName, cfcommon_name }; | |
131 | CFArrayRef ca_o_dn = CFArrayCreate(kCFAllocatorDefault, ca_o, 2, NULL); | |
132 | CFArrayRef ca_cn_dn = CFArrayCreate(kCFAllocatorDefault, ca_cn, 2, NULL); | |
133 | const void *ca_dn_array[2]; | |
134 | ||
135 | ca_dn_array[0] = CFArrayCreate(kCFAllocatorDefault, (const void **)&ca_o_dn, 1, NULL); | |
136 | ca_dn_array[1] = CFArrayCreate(kCFAllocatorDefault, (const void **)&ca_cn_dn, 1, NULL); | |
137 | ||
138 | CFArrayRef subject = CFArrayCreate(kCFAllocatorDefault, ca_dn_array, 2, NULL); | |
139 | SecCertificateRef cert = SecGenerateSelfSignedCertificate(subject, certParams, publicKey, privateKey); | |
140 | CFRelease(subject); | |
141 | CFRelease(certParams); | |
142 | ||
143 | if (!cert) | |
144 | goto cleanup; | |
145 | ||
146 | ident = SecIdentityCreate(kCFAllocatorDefault, cert, privateKey); | |
147 | ||
148 | if (ident) | |
149 | status = 1; | |
150 | ||
151 | /* | |
152 | * Cleanup and return... | |
153 | */ | |
154 | ||
155 | cleanup: | |
156 | ||
157 | if (cfcommon_name) | |
158 | CFRelease(cfcommon_name); | |
159 | ||
160 | if (keyParams) | |
161 | CFRelease(keyParams); | |
162 | ||
163 | if (ident) | |
164 | CFRelease(ident); | |
165 | ||
166 | if (cert) | |
167 | CFRelease(cert); | |
168 | ||
169 | if (publicKey) | |
170 | CFRelease(publicKey); | |
171 | ||
172 | if (privateKey) | |
173 | CFRelease(publicKey); | |
174 | ||
175 | return (status); | |
176 | ||
177 | #else /* !(HAVE_SECGENERATESELFSIGNEDCERTIFICATE && HAVE_SECKEYCHAINOPEN) */ | |
178 | int pid, /* Process ID of command */ | |
179 | status, /* Status of command */ | |
180 | i; /* Looping var */ | |
181 | char command[1024], /* Command */ | |
182 | *argv[4], /* Command-line arguments */ | |
183 | *envp[1000], /* Environment variables */ | |
184 | days[32], /* CERTTOOL_EXPIRATION_DAYS env var */ | |
185 | keychain[1024], /* Keychain argument */ | |
186 | infofile[1024], /* Type-in information for cert */ | |
187 | filename[1024]; /* Default keychain path */ | |
188 | cups_file_t *fp; /* Seed/info file */ | |
189 | ||
190 | ||
191 | 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)); | |
192 | ||
193 | (void)num_alt_names; | |
194 | (void)alt_names; | |
195 | ||
196 | if (!path) | |
197 | path = http_cdsa_default_path(filename, sizeof(filename)); | |
198 | ||
199 | /* | |
200 | * Run the "certtool" command to generate a self-signed certificate... | |
201 | */ | |
202 | ||
203 | if (!cupsFileFind("certtool", getenv("PATH"), 1, command, sizeof(command))) | |
204 | return (-1); | |
205 | ||
206 | /* | |
207 | * Create a file with the certificate information fields... | |
208 | * | |
209 | * Note: This assumes that the default questions are asked by the certtool | |
210 | * command... | |
211 | */ | |
212 | ||
213 | if ((fp = cupsTempFile2(infofile, sizeof(infofile))) == NULL) | |
214 | return (-1); | |
215 | ||
216 | cupsFilePrintf(fp, | |
217 | "CUPS Self-Signed Certificate\n" | |
218 | /* Enter key and certificate label */ | |
219 | "r\n" /* Generate RSA key pair */ | |
220 | "2048\n" /* Key size in bits */ | |
221 | "y\n" /* OK (y = yes) */ | |
222 | "b\n" /* Usage (b=signing/encryption) */ | |
223 | "s\n" /* Sign with SHA1 */ | |
224 | "y\n" /* OK (y = yes) */ | |
225 | "%s\n" /* Common name */ | |
226 | "\n" /* Country (default) */ | |
227 | "\n" /* Organization (default) */ | |
228 | "\n" /* Organizational unit (default) */ | |
229 | "\n" /* State/Province (default) */ | |
230 | "\n" /* Email address */ | |
231 | "y\n", /* OK (y = yes) */ | |
232 | common_name); | |
233 | cupsFileClose(fp); | |
234 | ||
235 | snprintf(keychain, sizeof(keychain), "k=%s", path); | |
236 | ||
237 | argv[0] = "certtool"; | |
238 | argv[1] = "c"; | |
239 | argv[2] = keychain; | |
240 | argv[3] = NULL; | |
241 | ||
242 | snprintf(days, sizeof(days), "CERTTOOL_EXPIRATION_DAYS=%d", (int)((expiration_date - time(NULL) + 86399) / 86400)); | |
243 | envp[0] = days; | |
244 | for (i = 0; i < (int)(sizeof(envp) / sizeof(envp[0]) - 2) && environ[i]; i ++) | |
245 | envp[i + 1] = environ[i]; | |
246 | envp[i] = NULL; | |
247 | ||
248 | posix_spawn_file_actions_t actions; /* File actions */ | |
249 | ||
250 | posix_spawn_file_actions_init(&actions); | |
251 | posix_spawn_file_actions_addclose(&actions, 0); | |
252 | posix_spawn_file_actions_addopen(&actions, 0, infofile, O_RDONLY, 0); | |
253 | posix_spawn_file_actions_addclose(&actions, 1); | |
254 | posix_spawn_file_actions_addopen(&actions, 1, "/dev/null", O_WRONLY, 0); | |
255 | posix_spawn_file_actions_addclose(&actions, 2); | |
256 | posix_spawn_file_actions_addopen(&actions, 2, "/dev/null", O_WRONLY, 0); | |
257 | ||
258 | if (posix_spawn(&pid, command, &actions, NULL, argv, envp)) | |
259 | { | |
260 | unlink(infofile); | |
261 | return (-1); | |
262 | } | |
263 | ||
264 | posix_spawn_file_actions_destroy(&actions); | |
265 | ||
266 | unlink(infofile); | |
267 | ||
268 | while (waitpid(pid, &status, 0) < 0) | |
269 | if (errno != EINTR) | |
270 | { | |
271 | status = -1; | |
272 | break; | |
273 | } | |
274 | ||
275 | return (!status); | |
276 | #endif /* HAVE_SECGENERATESELFSIGNEDCERTIFICATE && HAVE_SECKEYCHAINOPEN */ | |
277 | } | |
278 | ||
279 | ||
280 | /* | |
281 | * 'cupsSetServerCredentials()' - Set the default server credentials. | |
282 | * | |
283 | * Note: The server credentials are used by all threads in the running process. | |
284 | * This function is threadsafe. | |
285 | * | |
5d2cc5d3 | 286 | * @since CUPS 2.0/OS X 10.10@ |
1a18c85c MS |
287 | */ |
288 | ||
289 | int /* O - 1 on success, 0 on failure */ | |
290 | cupsSetServerCredentials( | |
291 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
292 | const char *common_name, /* I - Default common name for server */ | |
293 | int auto_create) /* I - 1 = automatically create self-signed certificates */ | |
294 | { | |
295 | DEBUG_printf(("cupsSetServerCredentials(path=\"%s\", common_name=\"%s\", auto_create=%d)", path, common_name, auto_create)); | |
296 | ||
297 | #ifdef HAVE_SECKEYCHAINOPEN | |
298 | char filename[1024]; /* Filename for keychain */ | |
299 | SecKeychainRef keychain = NULL;/* Temporary keychain */ | |
300 | ||
301 | ||
302 | if (!path) | |
303 | path = http_cdsa_default_path(filename, sizeof(filename)); | |
304 | ||
305 | if (SecKeychainOpen(path, &keychain) != noErr) | |
306 | { | |
307 | /* TODO: Set cups last error string */ | |
308 | DEBUG_puts("1cupsSetServerCredentials: Unable to open keychain, returning 0."); | |
309 | return (0); | |
310 | } | |
311 | ||
312 | _cupsMutexLock(&tls_mutex); | |
313 | ||
314 | /* | |
315 | * Close any keychain that is currently open... | |
316 | */ | |
317 | ||
318 | if (tls_keychain) | |
319 | CFRelease(tls_keychain); | |
320 | ||
321 | if (tls_keypath) | |
322 | _cupsStrFree(tls_keypath); | |
323 | ||
324 | if (tls_common_name) | |
325 | _cupsStrFree(tls_common_name); | |
326 | ||
327 | /* | |
328 | * Save the new keychain... | |
329 | */ | |
330 | ||
331 | tls_keychain = keychain; | |
332 | tls_keypath = _cupsStrAlloc(path); | |
333 | tls_auto_create = auto_create; | |
334 | tls_common_name = _cupsStrAlloc(common_name); | |
335 | ||
336 | _cupsMutexUnlock(&tls_mutex); | |
337 | ||
338 | DEBUG_puts("1cupsSetServerCredentials: Opened keychain, returning 1."); | |
339 | return (1); | |
340 | ||
341 | #else | |
342 | DEBUG_puts("1cupsSetServerCredentials: No keychain support compiled in, returning 0."); | |
343 | return (0); | |
344 | #endif /* HAVE_SECKEYCHAINOPEN */ | |
345 | } | |
346 | ||
347 | ||
348 | /* | |
349 | * 'httpCopyCredentials()' - Copy the credentials associated with the peer in | |
350 | * an encrypted connection. | |
351 | * | |
352 | * @since CUPS 1.5/OS X 10.7@ | |
353 | */ | |
354 | ||
355 | int /* O - Status of call (0 = success) */ | |
356 | httpCopyCredentials( | |
357 | http_t *http, /* I - Connection to server */ | |
358 | cups_array_t **credentials) /* O - Array of credentials */ | |
359 | { | |
360 | OSStatus error; /* Error code */ | |
361 | SecTrustRef peerTrust; /* Peer trust reference */ | |
362 | CFIndex count; /* Number of credentials */ | |
363 | SecCertificateRef secCert; /* Certificate reference */ | |
364 | CFDataRef data; /* Certificate data */ | |
365 | int i; /* Looping var */ | |
366 | ||
367 | ||
368 | DEBUG_printf(("httpCopyCredentials(http=%p, credentials=%p)", http, credentials)); | |
369 | ||
370 | if (credentials) | |
371 | *credentials = NULL; | |
372 | ||
373 | if (!http || !http->tls || !credentials) | |
374 | return (-1); | |
375 | ||
376 | if (!(error = SSLCopyPeerTrust(http->tls, &peerTrust)) && peerTrust) | |
377 | { | |
378 | DEBUG_printf(("2httpCopyCredentials: Peer provided %d certificates.", (int)SecTrustGetCertificateCount(peerTrust))); | |
379 | ||
380 | if ((*credentials = cupsArrayNew(NULL, NULL)) != NULL) | |
381 | { | |
382 | count = SecTrustGetCertificateCount(peerTrust); | |
383 | ||
384 | for (i = 0; i < count; i ++) | |
385 | { | |
386 | secCert = SecTrustGetCertificateAtIndex(peerTrust, i); | |
387 | ||
388 | #ifdef DEBUG | |
389 | CFStringRef cf_name = SecCertificateCopySubjectSummary(secCert); | |
390 | char name[1024]; | |
391 | if (cf_name) | |
392 | CFStringGetCString(cf_name, name, sizeof(name), kCFStringEncodingUTF8); | |
393 | else | |
394 | strlcpy(name, "unknown", sizeof(name)); | |
395 | ||
396 | DEBUG_printf(("2httpCopyCredentials: Certificate %d name is \"%s\".", i, name)); | |
397 | #endif /* DEBUG */ | |
398 | ||
399 | if ((data = SecCertificateCopyData(secCert)) != NULL) | |
400 | { | |
401 | DEBUG_printf(("2httpCopyCredentials: Adding %d byte certificate blob.", (int)CFDataGetLength(data))); | |
402 | ||
403 | httpAddCredential(*credentials, CFDataGetBytePtr(data), (size_t)CFDataGetLength(data)); | |
404 | CFRelease(data); | |
405 | } | |
406 | } | |
407 | } | |
408 | ||
409 | CFRelease(peerTrust); | |
410 | } | |
411 | ||
412 | return (error); | |
413 | } | |
414 | ||
415 | ||
416 | /* | |
417 | * '_httpCreateCredentials()' - Create credentials in the internal format. | |
418 | */ | |
419 | ||
420 | http_tls_credentials_t /* O - Internal credentials */ | |
421 | _httpCreateCredentials( | |
422 | cups_array_t *credentials) /* I - Array of credentials */ | |
423 | { | |
424 | CFMutableArrayRef peerCerts; /* Peer credentials reference */ | |
425 | SecCertificateRef secCert; /* Certificate reference */ | |
426 | http_credential_t *credential; /* Credential data */ | |
427 | ||
428 | ||
429 | if (!credentials) | |
430 | return (NULL); | |
431 | ||
432 | if ((peerCerts = CFArrayCreateMutable(kCFAllocatorDefault, | |
433 | cupsArrayCount(credentials), | |
434 | &kCFTypeArrayCallBacks)) == NULL) | |
435 | return (NULL); | |
436 | ||
437 | for (credential = (http_credential_t *)cupsArrayFirst(credentials); | |
438 | credential; | |
439 | credential = (http_credential_t *)cupsArrayNext(credentials)) | |
440 | { | |
441 | if ((secCert = http_cdsa_create_credential(credential)) != NULL) | |
442 | { | |
443 | CFArrayAppendValue(peerCerts, secCert); | |
444 | CFRelease(secCert); | |
445 | } | |
446 | } | |
447 | ||
448 | return (peerCerts); | |
449 | } | |
450 | ||
451 | ||
452 | /* | |
453 | * 'httpCredentialsAreValidForName()' - Return whether the credentials are valid for the given name. | |
454 | * | |
5d2cc5d3 | 455 | * @since CUPS 2.0/OS X 10.10@ |
1a18c85c MS |
456 | */ |
457 | ||
458 | int /* O - 1 if valid, 0 otherwise */ | |
459 | httpCredentialsAreValidForName( | |
460 | cups_array_t *credentials, /* I - Credentials */ | |
461 | const char *common_name) /* I - Name to check */ | |
462 | { | |
463 | SecCertificateRef secCert; /* Certificate reference */ | |
464 | CFStringRef cfcert_name = NULL; | |
465 | /* Certificate's common name (CF string) */ | |
466 | char cert_name[256]; /* Certificate's common name (C string) */ | |
467 | int valid = 1; /* Valid name? */ | |
468 | ||
469 | ||
470 | if ((secCert = http_cdsa_create_credential((http_credential_t *)cupsArrayFirst(credentials))) == NULL) | |
471 | return (0); | |
472 | ||
473 | /* | |
474 | * Compare the common names... | |
475 | */ | |
476 | ||
477 | if ((cfcert_name = SecCertificateCopySubjectSummary(secCert)) == NULL) | |
478 | { | |
479 | /* | |
480 | * Can't get common name, cannot be valid... | |
481 | */ | |
482 | ||
483 | valid = 0; | |
484 | } | |
485 | else if (CFStringGetCString(cfcert_name, cert_name, sizeof(cert_name), kCFStringEncodingUTF8) && | |
486 | _cups_strcasecmp(common_name, cert_name)) | |
487 | { | |
488 | /* | |
489 | * Not an exact match for the common name, check for wildcard certs... | |
490 | */ | |
491 | ||
492 | const char *domain = strchr(common_name, '.'); | |
493 | /* Domain in common name */ | |
494 | ||
495 | if (strncmp(cert_name, "*.", 2) || !domain || _cups_strcasecmp(domain, cert_name + 1)) | |
496 | { | |
497 | /* | |
498 | * Not a wildcard match. | |
499 | */ | |
500 | ||
501 | /* TODO: Check subject alternate names */ | |
502 | valid = 0; | |
503 | } | |
504 | } | |
505 | ||
506 | if (cfcert_name) | |
507 | CFRelease(cfcert_name); | |
508 | ||
509 | CFRelease(secCert); | |
510 | ||
511 | return (valid); | |
512 | } | |
513 | ||
514 | ||
515 | /* | |
516 | * 'httpCredentialsGetTrust()' - Return the trust of credentials. | |
517 | * | |
5d2cc5d3 | 518 | * @since CUPS 2.0/OS X 10.10@ |
1a18c85c MS |
519 | */ |
520 | ||
521 | http_trust_t /* O - Level of trust */ | |
522 | httpCredentialsGetTrust( | |
523 | cups_array_t *credentials, /* I - Credentials */ | |
524 | const char *common_name) /* I - Common name for trust lookup */ | |
525 | { | |
526 | SecCertificateRef secCert; /* Certificate reference */ | |
527 | http_trust_t trust = HTTP_TRUST_OK; | |
528 | /* Trusted? */ | |
529 | cups_array_t *tcreds = NULL; /* Trusted credentials */ | |
530 | _cups_globals_t *cg = _cupsGlobals(); | |
531 | /* Per-thread globals */ | |
532 | ||
533 | ||
534 | if (!common_name) | |
535 | return (HTTP_TRUST_UNKNOWN); | |
536 | ||
537 | if ((secCert = http_cdsa_create_credential((http_credential_t *)cupsArrayFirst(credentials))) == NULL) | |
538 | return (HTTP_TRUST_UNKNOWN); | |
539 | ||
540 | /* | |
541 | * Look this common name up in the default keychains... | |
542 | */ | |
543 | ||
544 | httpLoadCredentials(NULL, &tcreds, common_name); | |
545 | ||
546 | if (tcreds) | |
547 | { | |
548 | char credentials_str[1024], /* String for incoming credentials */ | |
549 | tcreds_str[1024]; /* String for saved credentials */ | |
550 | ||
551 | httpCredentialsString(credentials, credentials_str, sizeof(credentials_str)); | |
552 | httpCredentialsString(tcreds, tcreds_str, sizeof(tcreds_str)); | |
553 | ||
554 | if (strcmp(credentials_str, tcreds_str)) | |
555 | { | |
556 | /* | |
557 | * Credentials don't match, let's look at the expiration date of the new | |
558 | * credentials and allow if the new ones have a later expiration... | |
559 | */ | |
560 | ||
561 | if (httpCredentialsGetExpiration(credentials) <= httpCredentialsGetExpiration(tcreds) || | |
562 | !httpCredentialsAreValidForName(credentials, common_name)) | |
563 | { | |
564 | /* | |
565 | * Either the new credentials are not newly issued, or the common name | |
566 | * does not match the issued certificate... | |
567 | */ | |
568 | ||
569 | trust = HTTP_TRUST_INVALID; | |
570 | } | |
571 | else if (httpCredentialsGetExpiration(tcreds) < time(NULL)) | |
572 | { | |
573 | /* | |
574 | * Save the renewed credentials... | |
575 | */ | |
576 | ||
577 | trust = HTTP_TRUST_RENEWED; | |
578 | ||
579 | httpSaveCredentials(NULL, credentials, common_name); | |
580 | } | |
581 | } | |
582 | ||
583 | httpFreeCredentials(tcreds); | |
584 | } | |
585 | else if (cg->validate_certs && !httpCredentialsAreValidForName(credentials, common_name)) | |
586 | trust = HTTP_TRUST_INVALID; | |
587 | ||
588 | if (!cg->expired_certs && !SecCertificateIsValid(secCert, CFAbsoluteTimeGetCurrent())) | |
589 | trust = HTTP_TRUST_EXPIRED; | |
590 | else if (!cg->any_root && cupsArrayCount(credentials) == 1) | |
591 | trust = HTTP_TRUST_INVALID; | |
592 | ||
593 | CFRelease(secCert); | |
594 | ||
595 | return (trust); | |
596 | } | |
597 | ||
598 | ||
599 | /* | |
600 | * 'httpCredentialsGetExpiration()' - Return the expiration date of the credentials. | |
601 | * | |
5d2cc5d3 | 602 | * @since CUPS 2.0/OS X 10.10@ |
1a18c85c MS |
603 | */ |
604 | ||
605 | time_t /* O - Expiration date of credentials */ | |
606 | httpCredentialsGetExpiration( | |
607 | cups_array_t *credentials) /* I - Credentials */ | |
608 | { | |
609 | SecCertificateRef secCert; /* Certificate reference */ | |
610 | time_t expiration; /* Expiration date */ | |
611 | ||
612 | ||
613 | if ((secCert = http_cdsa_create_credential((http_credential_t *)cupsArrayFirst(credentials))) == NULL) | |
614 | return (0); | |
615 | ||
616 | expiration = (time_t)(SecCertificateNotValidAfter(secCert) + kCFAbsoluteTimeIntervalSince1970); | |
617 | ||
618 | CFRelease(secCert); | |
619 | ||
620 | return (expiration); | |
621 | } | |
622 | ||
623 | ||
624 | /* | |
625 | * 'httpCredentialsString()' - Return a string representing the credentials. | |
626 | * | |
5d2cc5d3 | 627 | * @since CUPS 2.0/OS X 10.10@ |
1a18c85c MS |
628 | */ |
629 | ||
630 | size_t /* O - Total size of credentials string */ | |
631 | httpCredentialsString( | |
632 | cups_array_t *credentials, /* I - Credentials */ | |
633 | char *buffer, /* I - Buffer or @code NULL@ */ | |
634 | size_t bufsize) /* I - Size of buffer */ | |
635 | { | |
636 | http_credential_t *first; /* First certificate */ | |
637 | SecCertificateRef secCert; /* Certificate reference */ | |
638 | ||
639 | ||
640 | DEBUG_printf(("httpCredentialsString(credentials=%p, buffer=%p, bufsize=" CUPS_LLFMT ")", credentials, buffer, CUPS_LLCAST bufsize)); | |
641 | ||
642 | if (!buffer) | |
643 | return (0); | |
644 | ||
645 | if (buffer && bufsize > 0) | |
646 | *buffer = '\0'; | |
647 | ||
648 | if ((first = (http_credential_t *)cupsArrayFirst(credentials)) != NULL && | |
649 | (secCert = http_cdsa_create_credential(first)) != NULL) | |
650 | { | |
651 | CFStringRef cf_name; /* CF common name string */ | |
652 | char name[256]; /* Common name associated with cert */ | |
653 | time_t expiration; /* Expiration date of cert */ | |
654 | _cups_md5_state_t md5_state; /* MD5 state */ | |
655 | unsigned char md5_digest[16]; /* MD5 result */ | |
656 | ||
657 | if ((cf_name = SecCertificateCopySubjectSummary(secCert)) != NULL) | |
658 | { | |
659 | CFStringGetCString(cf_name, name, (CFIndex)sizeof(name), kCFStringEncodingUTF8); | |
660 | CFRelease(cf_name); | |
661 | } | |
662 | else | |
663 | strlcpy(name, "unknown", sizeof(name)); | |
664 | ||
665 | expiration = (time_t)(SecCertificateNotValidAfter(secCert) + kCFAbsoluteTimeIntervalSince1970); | |
666 | ||
667 | _cupsMD5Init(&md5_state); | |
668 | _cupsMD5Append(&md5_state, first->data, (int)first->datalen); | |
669 | _cupsMD5Finish(&md5_state, md5_digest); | |
670 | ||
671 | 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]); | |
672 | ||
673 | CFRelease(secCert); | |
674 | } | |
675 | ||
676 | DEBUG_printf(("1httpCredentialsString: Returning \"%s\".", buffer)); | |
677 | ||
678 | return (strlen(buffer)); | |
679 | } | |
680 | ||
681 | ||
682 | /* | |
683 | * '_httpFreeCredentials()' - Free internal credentials. | |
684 | */ | |
685 | ||
686 | void | |
687 | _httpFreeCredentials( | |
688 | http_tls_credentials_t credentials) /* I - Internal credentials */ | |
689 | { | |
690 | if (!credentials) | |
691 | return; | |
692 | ||
693 | CFRelease(credentials); | |
694 | } | |
695 | ||
696 | ||
697 | /* | |
698 | * 'httpLoadCredentials()' - Load X.509 credentials from a keychain file. | |
699 | * | |
5d2cc5d3 | 700 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
701 | */ |
702 | ||
703 | int /* O - 0 on success, -1 on error */ | |
704 | httpLoadCredentials( | |
705 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
706 | cups_array_t **credentials, /* IO - Credentials */ | |
707 | const char *common_name) /* I - Common name for credentials */ | |
708 | { | |
709 | #ifdef HAVE_SECKEYCHAINOPEN | |
710 | OSStatus err; /* Error info */ | |
711 | char filename[1024]; /* Filename for keychain */ | |
712 | SecKeychainRef keychain = NULL;/* Keychain reference */ | |
713 | SecIdentitySearchRef search = NULL; /* Search reference */ | |
714 | SecCertificateRef cert = NULL; /* Certificate */ | |
715 | CFDataRef data; /* Certificate data */ | |
716 | SecPolicyRef policy = NULL; /* Policy ref */ | |
717 | CFStringRef cfcommon_name = NULL; | |
718 | /* Server name */ | |
719 | CFMutableDictionaryRef query = NULL; /* Query qualifiers */ | |
720 | CFArrayRef list = NULL; /* Keychain list */ | |
721 | ||
722 | ||
723 | DEBUG_printf(("httpLoadCredentials(path=\"%s\", credentials=%p, common_name=\"%s\")", path, credentials, common_name)); | |
724 | ||
725 | if (!credentials) | |
726 | return (-1); | |
727 | ||
728 | *credentials = NULL; | |
729 | ||
730 | if (!path) | |
731 | path = http_cdsa_default_path(filename, sizeof(filename)); | |
732 | ||
733 | if ((err = SecKeychainOpen(path, &keychain)) != noErr) | |
734 | goto cleanup; | |
735 | ||
736 | cfcommon_name = CFStringCreateWithCString(kCFAllocatorDefault, common_name, kCFStringEncodingUTF8); | |
737 | ||
738 | policy = SecPolicyCreateSSL(1, cfcommon_name); | |
739 | ||
740 | if (cfcommon_name) | |
741 | CFRelease(cfcommon_name); | |
742 | ||
743 | if (!policy) | |
744 | goto cleanup; | |
745 | ||
746 | if (!(query = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks))) | |
747 | goto cleanup; | |
748 | ||
749 | list = CFArrayCreate(kCFAllocatorDefault, (const void **)&keychain, 1, &kCFTypeArrayCallBacks); | |
750 | ||
751 | CFDictionaryAddValue(query, kSecClass, kSecClassCertificate); | |
752 | CFDictionaryAddValue(query, kSecMatchPolicy, policy); | |
753 | CFDictionaryAddValue(query, kSecReturnRef, kCFBooleanTrue); | |
754 | CFDictionaryAddValue(query, kSecMatchLimit, kSecMatchLimitOne); | |
755 | CFDictionaryAddValue(query, kSecMatchSearchList, list); | |
756 | ||
757 | CFRelease(list); | |
758 | ||
759 | err = SecItemCopyMatching(query, (CFTypeRef *)&cert); | |
760 | ||
761 | if (err) | |
762 | goto cleanup; | |
763 | ||
764 | if (CFGetTypeID(cert) != SecCertificateGetTypeID()) | |
765 | goto cleanup; | |
766 | ||
767 | if ((data = SecCertificateCopyData(cert)) != NULL) | |
768 | { | |
769 | DEBUG_printf(("1httpLoadCredentials: Adding %d byte certificate blob.", (int)CFDataGetLength(data))); | |
770 | ||
771 | *credentials = cupsArrayNew(NULL, NULL); | |
772 | httpAddCredential(*credentials, CFDataGetBytePtr(data), (size_t)CFDataGetLength(data)); | |
773 | CFRelease(data); | |
774 | } | |
775 | ||
776 | cleanup : | |
777 | ||
778 | if (keychain) | |
779 | CFRelease(keychain); | |
780 | if (search) | |
781 | CFRelease(search); | |
782 | if (cert) | |
783 | CFRelease(cert); | |
784 | if (policy) | |
785 | CFRelease(policy); | |
786 | if (query) | |
787 | CFRelease(query); | |
788 | ||
789 | DEBUG_printf(("1httpLoadCredentials: Returning %d.", *credentials ? 0 : -1)); | |
790 | ||
791 | return (*credentials ? 0 : -1); | |
792 | ||
793 | #else | |
794 | (void)path; | |
795 | (void)credentials; | |
796 | (void)common_name; | |
797 | ||
798 | return (-1); | |
799 | #endif /* HAVE_SECKEYCHAINOPEN */ | |
800 | } | |
801 | ||
802 | ||
803 | /* | |
804 | * 'httpSaveCredentials()' - Save X.509 credentials to a keychain file. | |
805 | * | |
5d2cc5d3 | 806 | * @since CUPS 2.0/OS 10.10@ |
1a18c85c MS |
807 | */ |
808 | ||
809 | int /* O - -1 on error, 0 on success */ | |
810 | httpSaveCredentials( | |
811 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
812 | cups_array_t *credentials, /* I - Credentials */ | |
813 | const char *common_name) /* I - Common name for credentials */ | |
814 | { | |
815 | #ifdef HAVE_SECKEYCHAINOPEN | |
816 | int ret = -1; /* Return value */ | |
817 | OSStatus err; /* Error info */ | |
818 | char filename[1024]; /* Filename for keychain */ | |
819 | SecKeychainRef keychain = NULL;/* Keychain reference */ | |
820 | SecIdentitySearchRef search = NULL; /* Search reference */ | |
821 | SecCertificateRef cert = NULL; /* Certificate */ | |
822 | CFMutableDictionaryRef attrs = NULL; /* Attributes for add */ | |
823 | CFArrayRef list = NULL; /* Keychain list */ | |
824 | ||
825 | ||
826 | DEBUG_printf(("httpSaveCredentials(path=\"%s\", credentials=%p, common_name=\"%s\")", path, credentials, common_name)); | |
827 | if (!credentials) | |
828 | goto cleanup; | |
829 | ||
830 | if (!httpCredentialsAreValidForName(credentials, common_name)) | |
831 | { | |
832 | DEBUG_puts("1httpSaveCredentials: Common name does not match."); | |
833 | return (-1); | |
834 | } | |
835 | ||
836 | if ((cert = http_cdsa_create_credential((http_credential_t *)cupsArrayFirst(credentials))) == NULL) | |
837 | { | |
838 | DEBUG_puts("1httpSaveCredentials: Unable to create certificate."); | |
839 | goto cleanup; | |
840 | } | |
841 | ||
842 | if (!path) | |
843 | path = http_cdsa_default_path(filename, sizeof(filename)); | |
844 | ||
845 | if ((err = SecKeychainOpen(path, &keychain)) != noErr) | |
846 | { | |
847 | DEBUG_printf(("1httpSaveCredentials: SecKeychainOpen returned %d.", (int)err)); | |
848 | goto cleanup; | |
849 | } | |
850 | ||
851 | if ((list = CFArrayCreate(kCFAllocatorDefault, (const void **)&keychain, 1, &kCFTypeArrayCallBacks)) == NULL) | |
852 | { | |
853 | DEBUG_puts("1httpSaveCredentials: Unable to create list of keychains."); | |
854 | goto cleanup; | |
855 | } | |
856 | ||
857 | if ((attrs = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks)) == NULL) | |
858 | { | |
859 | DEBUG_puts("1httpSaveCredentials: Unable to create dictionary."); | |
860 | goto cleanup; | |
861 | } | |
862 | ||
863 | CFDictionaryAddValue(attrs, kSecClass, kSecClassCertificate); | |
864 | CFDictionaryAddValue(attrs, kSecValueRef, cert); | |
865 | CFDictionaryAddValue(attrs, kSecMatchSearchList, list); | |
866 | ||
867 | /* Note: SecItemAdd consumes "attrs"... */ | |
868 | err = SecItemAdd(attrs, NULL); | |
869 | DEBUG_printf(("1httpSaveCredentials: SecItemAdd returned %d.", (int)err)); | |
870 | ||
871 | cleanup : | |
872 | ||
873 | if (list) | |
874 | CFRelease(list); | |
875 | if (keychain) | |
876 | CFRelease(keychain); | |
877 | if (search) | |
878 | CFRelease(search); | |
879 | if (cert) | |
880 | CFRelease(cert); | |
881 | ||
882 | DEBUG_printf(("1httpSaveCredentials: Returning %d.", ret)); | |
883 | ||
884 | return (ret); | |
885 | ||
886 | #else | |
887 | (void)path; | |
888 | (void)credentials; | |
889 | (void)common_name; | |
890 | ||
891 | return (-1); | |
892 | #endif /* HAVE_SECKEYCHAINOPEN */ | |
893 | } | |
894 | ||
895 | ||
896 | /* | |
897 | * '_httpTLSInitialize()' - Initialize the TLS stack. | |
898 | */ | |
899 | ||
900 | void | |
901 | _httpTLSInitialize(void) | |
902 | { | |
903 | /* | |
904 | * Nothing to do... | |
905 | */ | |
906 | } | |
907 | ||
908 | ||
909 | /* | |
910 | * '_httpTLSPending()' - Return the number of pending TLS-encrypted bytes. | |
911 | */ | |
912 | ||
913 | size_t | |
914 | _httpTLSPending(http_t *http) /* I - HTTP connection */ | |
915 | { | |
916 | size_t bytes; /* Bytes that are available */ | |
917 | ||
918 | ||
919 | if (!SSLGetBufferedReadSize(http->tls, &bytes)) | |
920 | return (bytes); | |
921 | ||
922 | return (0); | |
923 | } | |
924 | ||
925 | ||
926 | /* | |
927 | * '_httpTLSRead()' - Read from a SSL/TLS connection. | |
928 | */ | |
929 | ||
930 | int /* O - Bytes read */ | |
931 | _httpTLSRead(http_t *http, /* I - HTTP connection */ | |
932 | char *buf, /* I - Buffer to store data */ | |
933 | int len) /* I - Length of buffer */ | |
934 | { | |
935 | int result; /* Return value */ | |
936 | OSStatus error; /* Error info */ | |
937 | size_t processed; /* Number of bytes processed */ | |
938 | ||
939 | ||
940 | error = SSLRead(http->tls, buf, (size_t)len, &processed); | |
941 | DEBUG_printf(("6_httpTLSRead: error=%d, processed=%d", (int)error, | |
942 | (int)processed)); | |
943 | switch (error) | |
944 | { | |
945 | case 0 : | |
946 | result = (int)processed; | |
947 | break; | |
948 | ||
949 | case errSSLWouldBlock : | |
950 | if (processed) | |
951 | result = (int)processed; | |
952 | else | |
953 | { | |
954 | result = -1; | |
955 | errno = EINTR; | |
956 | } | |
957 | break; | |
958 | ||
959 | case errSSLClosedGraceful : | |
960 | default : | |
961 | if (processed) | |
962 | result = (int)processed; | |
963 | else | |
964 | { | |
965 | result = -1; | |
966 | errno = EPIPE; | |
967 | } | |
968 | break; | |
969 | } | |
970 | ||
971 | return (result); | |
972 | } | |
973 | ||
974 | ||
975 | /* | |
976 | * '_httpTLSStart()' - Set up SSL/TLS support on a connection. | |
977 | */ | |
978 | ||
979 | int /* O - 0 on success, -1 on failure */ | |
980 | _httpTLSStart(http_t *http) /* I - HTTP connection */ | |
981 | { | |
982 | char hostname[256], /* Hostname */ | |
983 | *hostptr; /* Pointer into hostname */ | |
984 | _cups_globals_t *cg = _cupsGlobals(); | |
985 | /* Pointer to library globals */ | |
986 | OSStatus error; /* Error code */ | |
987 | const char *message = NULL;/* Error message */ | |
988 | cups_array_t *credentials; /* Credentials array */ | |
989 | cups_array_t *names; /* CUPS distinguished names */ | |
990 | CFArrayRef dn_array; /* CF distinguished names array */ | |
991 | CFIndex count; /* Number of credentials */ | |
992 | CFDataRef data; /* Certificate data */ | |
993 | int i; /* Looping var */ | |
994 | http_credential_t *credential; /* Credential data */ | |
995 | ||
996 | ||
997 | DEBUG_printf(("7_httpTLSStart(http=%p)", http)); | |
998 | ||
999 | #ifdef HAVE_SECKEYCHAINOPEN | |
1000 | if (http->mode == _HTTP_MODE_SERVER && !tls_keychain) | |
1001 | #else | |
1002 | if (http->mode == _HTTP_MODE_SERVER) | |
1003 | #endif /* HAVE_SECKEYCHAINOPEN */ | |
1004 | { | |
1005 | DEBUG_puts("4_httpTLSStart: cupsSetServerCredentials not called."); | |
1006 | http->error = errno = EINVAL; | |
1007 | http->status = HTTP_STATUS_ERROR; | |
1008 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Server credentials not set."), 1); | |
1009 | ||
1010 | return (-1); | |
1011 | } | |
1012 | ||
1013 | if ((http->tls = SSLCreateContext(kCFAllocatorDefault, http->mode == _HTTP_MODE_CLIENT ? kSSLClientSide : kSSLServerSide, kSSLStreamType)) == NULL) | |
1014 | { | |
1015 | DEBUG_puts("4_httpTLSStart: SSLCreateContext failed."); | |
1016 | http->error = errno = ENOMEM; | |
1017 | http->status = HTTP_STATUS_ERROR; | |
1018 | _cupsSetHTTPError(HTTP_STATUS_ERROR); | |
1019 | ||
1020 | return (-1); | |
1021 | } | |
1022 | ||
1023 | error = SSLSetConnection(http->tls, http); | |
1024 | DEBUG_printf(("4_httpTLSStart: SSLSetConnection, error=%d", (int)error)); | |
1025 | ||
1026 | if (!error) | |
1027 | { | |
1028 | error = SSLSetIOFuncs(http->tls, http_cdsa_read, http_cdsa_write); | |
1029 | DEBUG_printf(("4_httpTLSStart: SSLSetIOFuncs, error=%d", (int)error)); | |
1030 | } | |
1031 | ||
1032 | if (!error) | |
1033 | { | |
1034 | error = SSLSetSessionOption(http->tls, kSSLSessionOptionBreakOnServerAuth, | |
1035 | true); | |
1036 | DEBUG_printf(("4_httpTLSStart: SSLSetSessionOption, error=%d", | |
1037 | (int)error)); | |
1038 | } | |
1039 | ||
1040 | if (!error && http->mode == _HTTP_MODE_CLIENT) | |
1041 | { | |
1042 | /* | |
1043 | * Client: set client-side credentials, if any... | |
1044 | */ | |
1045 | ||
1046 | if (cg->client_cert_cb) | |
1047 | { | |
1048 | error = SSLSetSessionOption(http->tls, | |
1049 | kSSLSessionOptionBreakOnCertRequested, true); | |
1050 | DEBUG_printf(("4_httpTLSStart: kSSLSessionOptionBreakOnCertRequested, " | |
1051 | "error=%d", (int)error)); | |
1052 | } | |
1053 | else | |
1054 | { | |
1055 | error = http_cdsa_set_credentials(http); | |
1056 | DEBUG_printf(("4_httpTLSStart: http_cdsa_set_credentials, error=%d", | |
1057 | (int)error)); | |
1058 | } | |
1059 | } | |
1060 | else if (!error) | |
1061 | { | |
1062 | /* | |
1063 | * Server: find/create a certificate for TLS... | |
1064 | */ | |
1065 | ||
1066 | if (http->fields[HTTP_FIELD_HOST][0]) | |
1067 | { | |
1068 | /* | |
1069 | * Use hostname for TLS upgrade... | |
1070 | */ | |
1071 | ||
1072 | strlcpy(hostname, http->fields[HTTP_FIELD_HOST], sizeof(hostname)); | |
1073 | } | |
1074 | else | |
1075 | { | |
1076 | /* | |
1077 | * Resolve hostname from connection address... | |
1078 | */ | |
1079 | ||
1080 | http_addr_t addr; /* Connection address */ | |
1081 | socklen_t addrlen; /* Length of address */ | |
1082 | ||
1083 | addrlen = sizeof(addr); | |
1084 | if (getsockname(http->fd, (struct sockaddr *)&addr, &addrlen)) | |
1085 | { | |
1086 | DEBUG_printf(("4_httpTLSStart: Unable to get socket address: %s", strerror(errno))); | |
1087 | hostname[0] = '\0'; | |
1088 | } | |
1089 | else if (httpAddrLocalhost(&addr)) | |
1090 | hostname[0] = '\0'; | |
1091 | else | |
1092 | { | |
1093 | httpAddrLookup(&addr, hostname, sizeof(hostname)); | |
1094 | DEBUG_printf(("4_httpTLSStart: Resolved socket address to \"%s\".", hostname)); | |
1095 | } | |
1096 | } | |
1097 | ||
1098 | #ifdef HAVE_SECKEYCHAINOPEN | |
1099 | if (isdigit(hostname[0] & 255) || hostname[0] == '[') | |
1100 | hostname[0] = '\0'; /* Don't allow numeric addresses */ | |
1101 | ||
1102 | if (hostname[0]) | |
1103 | http->tls_credentials = http_cdsa_copy_server(hostname); | |
1104 | else if (tls_common_name) | |
1105 | http->tls_credentials = http_cdsa_copy_server(tls_common_name); | |
1106 | ||
1107 | if (!http->tls_credentials && tls_auto_create && (hostname[0] || tls_common_name)) | |
1108 | { | |
1109 | DEBUG_printf(("4_httpTLSStart: Auto-create credentials for \"%s\".", hostname[0] ? hostname : tls_common_name)); | |
1110 | ||
1111 | if (!cupsMakeServerCredentials(tls_keypath, hostname[0] ? hostname : tls_common_name, 0, NULL, time(NULL) + 365 * 86400)) | |
1112 | { | |
1113 | DEBUG_puts("4_httpTLSStart: cupsMakeServerCredentials failed."); | |
1114 | http->error = errno = EINVAL; | |
1115 | http->status = HTTP_STATUS_ERROR; | |
1116 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unable to create server credentials."), 1); | |
1117 | ||
1118 | return (-1); | |
1119 | } | |
1120 | ||
1121 | http->tls_credentials = http_cdsa_copy_server(hostname[0] ? hostname : tls_common_name); | |
1122 | } | |
1123 | #endif /* HAVE_SECKEYCHAINOPEN */ | |
1124 | ||
1125 | if (!http->tls_credentials) | |
1126 | { | |
1127 | DEBUG_puts("4_httpTLSStart: Unable to find server credentials."); | |
1128 | http->error = errno = EINVAL; | |
1129 | http->status = HTTP_STATUS_ERROR; | |
1130 | _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unable to find server credentials."), 1); | |
1131 | ||
1132 | return (-1); | |
1133 | } | |
1134 | ||
1135 | error = SSLSetCertificate(http->tls, http->tls_credentials); | |
1136 | ||
1137 | DEBUG_printf(("4_httpTLSStart: SSLSetCertificate, error=%d", (int)error)); | |
1138 | } | |
1139 | ||
1140 | DEBUG_printf(("4_httpTLSStart: tls_credentials=%p", http->tls_credentials)); | |
1141 | ||
1142 | /* | |
1143 | * Let the server know which hostname/domain we are trying to connect to | |
1144 | * in case it wants to serve up a certificate with a matching common name. | |
1145 | */ | |
1146 | ||
1147 | if (!error && http->mode == _HTTP_MODE_CLIENT) | |
1148 | { | |
1149 | /* | |
1150 | * Client: get the hostname to use for TLS... | |
1151 | */ | |
1152 | ||
1153 | if (httpAddrLocalhost(http->hostaddr)) | |
1154 | { | |
1155 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
1156 | } | |
1157 | else | |
1158 | { | |
1159 | /* | |
1160 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
1161 | */ | |
1162 | ||
1163 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
1164 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
1165 | *hostptr == '.') | |
1166 | *hostptr = '\0'; | |
1167 | } | |
1168 | ||
1169 | error = SSLSetPeerDomainName(http->tls, hostname, strlen(hostname)); | |
1170 | ||
1171 | DEBUG_printf(("4_httpTLSStart: SSLSetPeerDomainName, error=%d", (int)error)); | |
1172 | } | |
1173 | ||
1174 | if (!error) | |
1175 | { | |
1176 | int done = 0; /* Are we done yet? */ | |
1177 | ||
1178 | while (!error && !done) | |
1179 | { | |
1180 | error = SSLHandshake(http->tls); | |
1181 | ||
1182 | DEBUG_printf(("4_httpTLSStart: SSLHandshake returned %d.", (int)error)); | |
1183 | ||
1184 | switch (error) | |
1185 | { | |
1186 | case noErr : | |
1187 | done = 1; | |
1188 | break; | |
1189 | ||
1190 | case errSSLWouldBlock : | |
1191 | error = noErr; /* Force a retry */ | |
1192 | usleep(1000); /* in 1 millisecond */ | |
1193 | break; | |
1194 | ||
1195 | case errSSLServerAuthCompleted : | |
1196 | error = 0; | |
1197 | if (cg->server_cert_cb) | |
1198 | { | |
1199 | error = httpCopyCredentials(http, &credentials); | |
1200 | if (!error) | |
1201 | { | |
1202 | error = (cg->server_cert_cb)(http, http->tls, credentials, | |
1203 | cg->server_cert_data); | |
1204 | httpFreeCredentials(credentials); | |
1205 | } | |
1206 | ||
1207 | DEBUG_printf(("4_httpTLSStart: Server certificate callback " | |
1208 | "returned %d.", (int)error)); | |
1209 | } | |
1210 | break; | |
1211 | ||
1212 | case errSSLClientCertRequested : | |
1213 | error = 0; | |
1214 | ||
1215 | if (cg->client_cert_cb) | |
1216 | { | |
1217 | names = NULL; | |
1218 | if (!(error = SSLCopyDistinguishedNames(http->tls, &dn_array)) && | |
1219 | dn_array) | |
1220 | { | |
1221 | if ((names = cupsArrayNew(NULL, NULL)) != NULL) | |
1222 | { | |
1223 | for (i = 0, count = CFArrayGetCount(dn_array); i < count; i++) | |
1224 | { | |
1225 | data = (CFDataRef)CFArrayGetValueAtIndex(dn_array, i); | |
1226 | ||
1227 | if ((credential = malloc(sizeof(*credential))) != NULL) | |
1228 | { | |
1229 | credential->datalen = (size_t)CFDataGetLength(data); | |
1230 | if ((credential->data = malloc(credential->datalen))) | |
1231 | { | |
1232 | memcpy((void *)credential->data, CFDataGetBytePtr(data), | |
1233 | credential->datalen); | |
1234 | cupsArrayAdd(names, credential); | |
1235 | } | |
1236 | else | |
1237 | free(credential); | |
1238 | } | |
1239 | } | |
1240 | } | |
1241 | ||
1242 | CFRelease(dn_array); | |
1243 | } | |
1244 | ||
1245 | if (!error) | |
1246 | { | |
1247 | error = (cg->client_cert_cb)(http, http->tls, names, | |
1248 | cg->client_cert_data); | |
1249 | ||
1250 | DEBUG_printf(("4_httpTLSStart: Client certificate callback " | |
1251 | "returned %d.", (int)error)); | |
1252 | } | |
1253 | ||
1254 | httpFreeCredentials(names); | |
1255 | } | |
1256 | break; | |
1257 | ||
1258 | case errSSLUnknownRootCert : | |
1259 | message = _("Unable to establish a secure connection to host " | |
1260 | "(untrusted certificate)."); | |
1261 | break; | |
1262 | ||
1263 | case errSSLNoRootCert : | |
1264 | message = _("Unable to establish a secure connection to host " | |
1265 | "(self-signed certificate)."); | |
1266 | break; | |
1267 | ||
1268 | case errSSLCertExpired : | |
1269 | message = _("Unable to establish a secure connection to host " | |
1270 | "(expired certificate)."); | |
1271 | break; | |
1272 | ||
1273 | case errSSLCertNotYetValid : | |
1274 | message = _("Unable to establish a secure connection to host " | |
1275 | "(certificate not yet valid)."); | |
1276 | break; | |
1277 | ||
1278 | case errSSLHostNameMismatch : | |
1279 | message = _("Unable to establish a secure connection to host " | |
1280 | "(host name mismatch)."); | |
1281 | break; | |
1282 | ||
1283 | case errSSLXCertChainInvalid : | |
1284 | message = _("Unable to establish a secure connection to host " | |
1285 | "(certificate chain invalid)."); | |
1286 | break; | |
1287 | ||
1288 | case errSSLConnectionRefused : | |
1289 | message = _("Unable to establish a secure connection to host " | |
1290 | "(peer dropped connection before responding)."); | |
1291 | break; | |
1292 | ||
1293 | default : | |
1294 | break; | |
1295 | } | |
1296 | } | |
1297 | } | |
1298 | ||
1299 | if (error) | |
1300 | { | |
1301 | http->error = error; | |
1302 | http->status = HTTP_STATUS_ERROR; | |
1303 | errno = ECONNREFUSED; | |
1304 | ||
1305 | CFRelease(http->tls); | |
1306 | http->tls = NULL; | |
1307 | ||
1308 | /* | |
1309 | * If an error string wasn't set by the callbacks use a generic one... | |
1310 | */ | |
1311 | ||
1312 | if (!message) | |
1313 | #ifdef HAVE_CSSMERRORSTRING | |
1314 | message = cssmErrorString(error); | |
1315 | #else | |
1316 | message = _("Unable to establish a secure connection to host."); | |
1317 | #endif /* HAVE_CSSMERRORSTRING */ | |
1318 | ||
1319 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, message, 1); | |
1320 | ||
1321 | return (-1); | |
1322 | } | |
1323 | ||
1324 | return (0); | |
1325 | } | |
1326 | ||
1327 | ||
1328 | /* | |
1329 | * '_httpTLSStop()' - Shut down SSL/TLS on a connection. | |
1330 | */ | |
1331 | ||
1332 | void | |
1333 | _httpTLSStop(http_t *http) /* I - HTTP connection */ | |
1334 | { | |
1335 | while (SSLClose(http->tls) == errSSLWouldBlock) | |
1336 | usleep(1000); | |
1337 | ||
1338 | CFRelease(http->tls); | |
1339 | ||
1340 | if (http->tls_credentials) | |
1341 | CFRelease(http->tls_credentials); | |
1342 | ||
1343 | http->tls = NULL; | |
1344 | http->tls_credentials = NULL; | |
1345 | } | |
1346 | ||
1347 | ||
1348 | /* | |
1349 | * '_httpTLSWrite()' - Write to a SSL/TLS connection. | |
1350 | */ | |
1351 | ||
1352 | int /* O - Bytes written */ | |
1353 | _httpTLSWrite(http_t *http, /* I - HTTP connection */ | |
1354 | const char *buf, /* I - Buffer holding data */ | |
1355 | int len) /* I - Length of buffer */ | |
1356 | { | |
1357 | ssize_t result; /* Return value */ | |
1358 | OSStatus error; /* Error info */ | |
1359 | size_t processed; /* Number of bytes processed */ | |
1360 | ||
1361 | ||
1362 | DEBUG_printf(("2_httpTLSWrite(http=%p, buf=%p, len=%d)", http, buf, len)); | |
1363 | ||
1364 | error = SSLWrite(http->tls, buf, (size_t)len, &processed); | |
1365 | ||
1366 | switch (error) | |
1367 | { | |
1368 | case 0 : | |
1369 | result = (int)processed; | |
1370 | break; | |
1371 | ||
1372 | case errSSLWouldBlock : | |
1373 | if (processed) | |
1374 | { | |
1375 | result = (int)processed; | |
1376 | } | |
1377 | else | |
1378 | { | |
1379 | result = -1; | |
1380 | errno = EINTR; | |
1381 | } | |
1382 | break; | |
1383 | ||
1384 | case errSSLClosedGraceful : | |
1385 | default : | |
1386 | if (processed) | |
1387 | { | |
1388 | result = (int)processed; | |
1389 | } | |
1390 | else | |
1391 | { | |
1392 | result = -1; | |
1393 | errno = EPIPE; | |
1394 | } | |
1395 | break; | |
1396 | } | |
1397 | ||
1398 | DEBUG_printf(("3_httpTLSWrite: Returning %d.", (int)result)); | |
1399 | ||
1400 | return ((int)result); | |
1401 | } | |
1402 | ||
1403 | ||
1404 | #ifdef HAVE_SECKEYCHAINOPEN | |
1405 | /* | |
1406 | * 'http_cdsa_copy_server()' - Find and copy server credentials from the keychain. | |
1407 | */ | |
1408 | ||
1409 | static CFArrayRef /* O - Array of certificates or NULL */ | |
1410 | http_cdsa_copy_server( | |
1411 | const char *common_name) /* I - Server's hostname */ | |
1412 | { | |
1413 | OSStatus err; /* Error info */ | |
1414 | SecIdentitySearchRef search = NULL; /* Search reference */ | |
1415 | SecIdentityRef identity = NULL;/* Identity */ | |
1416 | CFArrayRef certificates = NULL; | |
1417 | /* Certificate array */ | |
1418 | SecPolicyRef policy = NULL; /* Policy ref */ | |
1419 | CFStringRef cfcommon_name = NULL; | |
1420 | /* Server name */ | |
1421 | CFMutableDictionaryRef query = NULL; /* Query qualifiers */ | |
1422 | CFArrayRef list = NULL; /* Keychain list */ | |
1423 | ||
1424 | ||
1425 | cfcommon_name = CFStringCreateWithCString(kCFAllocatorDefault, common_name, kCFStringEncodingUTF8); | |
1426 | ||
1427 | policy = SecPolicyCreateSSL(1, cfcommon_name); | |
1428 | ||
1429 | if (cfcommon_name) | |
1430 | CFRelease(cfcommon_name); | |
1431 | ||
1432 | if (!policy) | |
1433 | goto cleanup; | |
1434 | ||
1435 | if (!(query = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks))) | |
1436 | goto cleanup; | |
1437 | ||
1438 | _cupsMutexLock(&tls_mutex); | |
1439 | ||
1440 | list = CFArrayCreate(kCFAllocatorDefault, (const void **)&tls_keychain, 1, &kCFTypeArrayCallBacks); | |
1441 | ||
1442 | CFDictionaryAddValue(query, kSecClass, kSecClassIdentity); | |
1443 | CFDictionaryAddValue(query, kSecMatchPolicy, policy); | |
1444 | CFDictionaryAddValue(query, kSecReturnRef, kCFBooleanTrue); | |
1445 | CFDictionaryAddValue(query, kSecMatchLimit, kSecMatchLimitOne); | |
1446 | CFDictionaryAddValue(query, kSecMatchSearchList, list); | |
1447 | ||
1448 | CFRelease(list); | |
1449 | ||
1450 | err = SecItemCopyMatching(query, (CFTypeRef *)&identity); | |
1451 | ||
1452 | _cupsMutexUnlock(&tls_mutex); | |
1453 | ||
1454 | if (err) | |
1455 | goto cleanup; | |
1456 | ||
1457 | if (CFGetTypeID(identity) != SecIdentityGetTypeID()) | |
1458 | goto cleanup; | |
1459 | ||
1460 | if ((certificates = CFArrayCreate(NULL, (const void **)&identity, 1, &kCFTypeArrayCallBacks)) == NULL) | |
1461 | goto cleanup; | |
1462 | ||
1463 | cleanup : | |
1464 | ||
1465 | if (search) | |
1466 | CFRelease(search); | |
1467 | if (identity) | |
1468 | CFRelease(identity); | |
1469 | ||
1470 | if (policy) | |
1471 | CFRelease(policy); | |
1472 | if (query) | |
1473 | CFRelease(query); | |
1474 | ||
1475 | return (certificates); | |
1476 | } | |
1477 | #endif /* HAVE_SECKEYCHAINOPEN */ | |
1478 | ||
1479 | ||
1480 | /* | |
1481 | * 'http_cdsa_create_credential()' - Create a single credential in the internal format. | |
1482 | */ | |
1483 | ||
1484 | static SecCertificateRef /* O - Certificate */ | |
1485 | http_cdsa_create_credential( | |
1486 | http_credential_t *credential) /* I - Credential */ | |
1487 | { | |
1488 | if (!credential) | |
1489 | return (NULL); | |
1490 | ||
1491 | return (SecCertificateCreateWithBytes(kCFAllocatorDefault, credential->data, (CFIndex)credential->datalen)); | |
1492 | } | |
1493 | ||
1494 | ||
1495 | /* | |
1496 | * 'http_cdsa_default_path()' - Get the default keychain path. | |
1497 | */ | |
1498 | ||
1499 | static const char * /* O - Keychain path */ | |
1500 | http_cdsa_default_path(char *buffer, /* I - Path buffer */ | |
1501 | size_t bufsize) /* I - Size of buffer */ | |
1502 | { | |
1503 | const char *home = getenv("HOME"); /* HOME environment variable */ | |
1504 | ||
1505 | ||
1506 | if (getuid() && home) | |
1507 | snprintf(buffer, bufsize, "%s/Library/Keychains/login.keychain", home); | |
1508 | else | |
1509 | strlcpy(buffer, "/Library/Keychains/System.keychain", bufsize); | |
1510 | ||
1511 | DEBUG_printf(("1http_cdsa_default_path: Using default path \"%s\".", buffer)); | |
1512 | ||
1513 | return (buffer); | |
1514 | } | |
1515 | ||
1516 | ||
1517 | /* | |
1518 | * 'http_cdsa_read()' - Read function for the CDSA library. | |
1519 | */ | |
1520 | ||
1521 | static OSStatus /* O - -1 on error, 0 on success */ | |
1522 | http_cdsa_read( | |
1523 | SSLConnectionRef connection, /* I - SSL/TLS connection */ | |
1524 | void *data, /* I - Data buffer */ | |
1525 | size_t *dataLength) /* IO - Number of bytes */ | |
1526 | { | |
1527 | OSStatus result; /* Return value */ | |
1528 | ssize_t bytes; /* Number of bytes read */ | |
1529 | http_t *http; /* HTTP connection */ | |
1530 | ||
1531 | ||
1532 | http = (http_t *)connection; | |
1533 | ||
1534 | if (!http->blocking) | |
1535 | { | |
1536 | /* | |
1537 | * Make sure we have data before we read... | |
1538 | */ | |
1539 | ||
1540 | while (!_httpWait(http, http->wait_value, 0)) | |
1541 | { | |
1542 | if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) | |
1543 | continue; | |
1544 | ||
1545 | http->error = ETIMEDOUT; | |
1546 | return (-1); | |
1547 | } | |
1548 | } | |
1549 | ||
1550 | do | |
1551 | { | |
1552 | bytes = recv(http->fd, data, *dataLength, 0); | |
1553 | } | |
1554 | while (bytes == -1 && (errno == EINTR || errno == EAGAIN)); | |
1555 | ||
1556 | if ((size_t)bytes == *dataLength) | |
1557 | { | |
1558 | result = 0; | |
1559 | } | |
1560 | else if (bytes > 0) | |
1561 | { | |
1562 | *dataLength = (size_t)bytes; | |
1563 | result = errSSLWouldBlock; | |
1564 | } | |
1565 | else | |
1566 | { | |
1567 | *dataLength = 0; | |
1568 | ||
1569 | if (bytes == 0) | |
1570 | result = errSSLClosedGraceful; | |
1571 | else if (errno == EAGAIN) | |
1572 | result = errSSLWouldBlock; | |
1573 | else | |
1574 | result = errSSLClosedAbort; | |
1575 | } | |
1576 | ||
1577 | return (result); | |
1578 | } | |
1579 | ||
1580 | ||
1581 | /* | |
1582 | * 'http_cdsa_set_credentials()' - Set the TLS credentials. | |
1583 | */ | |
1584 | ||
1585 | static int /* O - Status of connection */ | |
1586 | http_cdsa_set_credentials(http_t *http) /* I - HTTP connection */ | |
1587 | { | |
1588 | _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */ | |
1589 | OSStatus error = 0; /* Error code */ | |
1590 | http_tls_credentials_t credentials = NULL; | |
1591 | /* TLS credentials */ | |
1592 | ||
1593 | ||
1594 | DEBUG_printf(("7http_tls_set_credentials(%p)", http)); | |
1595 | ||
1596 | /* | |
1597 | * Prefer connection specific credentials... | |
1598 | */ | |
1599 | ||
1600 | if ((credentials = http->tls_credentials) == NULL) | |
1601 | credentials = cg->tls_credentials; | |
1602 | ||
1603 | if (credentials) | |
1604 | { | |
1605 | error = SSLSetCertificate(http->tls, credentials); | |
1606 | DEBUG_printf(("4http_tls_set_credentials: SSLSetCertificate, error=%d", | |
1607 | (int)error)); | |
1608 | } | |
1609 | else | |
1610 | DEBUG_puts("4http_tls_set_credentials: No credentials to set."); | |
1611 | ||
1612 | return (error); | |
1613 | } | |
1614 | ||
1615 | ||
1616 | /* | |
1617 | * 'http_cdsa_write()' - Write function for the CDSA library. | |
1618 | */ | |
1619 | ||
1620 | static OSStatus /* O - -1 on error, 0 on success */ | |
1621 | http_cdsa_write( | |
1622 | SSLConnectionRef connection, /* I - SSL/TLS connection */ | |
1623 | const void *data, /* I - Data buffer */ | |
1624 | size_t *dataLength) /* IO - Number of bytes */ | |
1625 | { | |
1626 | OSStatus result; /* Return value */ | |
1627 | ssize_t bytes; /* Number of bytes read */ | |
1628 | http_t *http; /* HTTP connection */ | |
1629 | ||
1630 | ||
1631 | http = (http_t *)connection; | |
1632 | ||
1633 | do | |
1634 | { | |
1635 | bytes = write(http->fd, data, *dataLength); | |
1636 | } | |
1637 | while (bytes == -1 && (errno == EINTR || errno == EAGAIN)); | |
1638 | ||
1639 | if ((size_t)bytes == *dataLength) | |
1640 | { | |
1641 | result = 0; | |
1642 | } | |
1643 | else if (bytes >= 0) | |
1644 | { | |
1645 | *dataLength = (size_t)bytes; | |
1646 | result = errSSLWouldBlock; | |
1647 | } | |
1648 | else | |
1649 | { | |
1650 | *dataLength = 0; | |
1651 | ||
1652 | if (errno == EAGAIN) | |
1653 | result = errSSLWouldBlock; | |
1654 | else | |
1655 | result = errSSLClosedAbort; | |
1656 | } | |
1657 | ||
1658 | return (result); | |
1659 | } | |
1660 | ||
1661 | ||
1662 | /* | |
b9367124 | 1663 | * End of "$Id: tls-darwin.c 12159 2014-09-23 14:56:14Z msweet $". |
1a18c85c | 1664 | */ |