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Commit | Line | Data |
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2c85b752 MS |
1 | /* |
2 | * "$Id$" | |
3 | * | |
4 | * TLS support code for CUPS on OS X. | |
5 | * | |
6 | * Copyright 2007-2013 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 | ||
dafebafd | 18 | /**** This file is included from http.c ****/ |
2c85b752 MS |
19 | |
20 | /* | |
dafebafd | 21 | * Include necessary headers... |
2c85b752 MS |
22 | */ |
23 | ||
dafebafd MS |
24 | #include <spawn.h> |
25 | ||
26 | extern char **environ; | |
27 | ||
28 | ||
29 | /* | |
30 | * Local functions... | |
31 | */ | |
2c85b752 MS |
32 | |
33 | static OSStatus http_cdsa_read(SSLConnectionRef connection, void *data, | |
34 | size_t *dataLength); | |
35 | static OSStatus http_cdsa_write(SSLConnectionRef connection, const void *data, | |
36 | size_t *dataLength); | |
37 | ||
38 | ||
3af9ac9e MS |
39 | /* |
40 | * 'cupsMakeServerCredentials()' - Make a self-signed certificate and private key pair. | |
41 | * | |
42 | * @since CUPS 2.0@ | |
43 | */ | |
44 | ||
45 | int /* O - 1 on success, 0 on failure */ | |
46 | cupsMakeServerCredentials( | |
47 | const char *path, /* I - Path to keychain/directory */ | |
48 | const char *common_name, /* I - Common name */ | |
49 | int num_alt_names, /* I - Number of subject alternate names */ | |
50 | const char **alt_names, /* I - Subject Alternate Names */ | |
51 | time_t expiration_date) /* I - Expiration date */ | |
52 | { | |
53 | (void)path; | |
54 | (void)common_name; | |
55 | (void)num_alt_names; | |
56 | (void)alt_names; | |
57 | (void)expiration_date; | |
58 | ||
59 | return (0); | |
60 | } | |
61 | ||
62 | ||
63 | /* | |
64 | * 'cupsSetServerCredentials()' - Set the default server credentials. | |
65 | * | |
66 | * Note: The server credentials are used by all threads in the running process. | |
67 | * This function is threadsafe. | |
68 | * | |
69 | * @since CUPS 2.0@ | |
70 | */ | |
71 | ||
72 | int /* O - 1 on success, 0 on failure */ | |
73 | cupsSetServerCredentials( | |
74 | const char *path, /* I - Path to keychain/directory */ | |
75 | const char *common_name, /* I - Default common name for server */ | |
76 | int auto_create) /* I - 1 = automatically create self-signed certificates */ | |
77 | { | |
78 | (void)path; | |
79 | (void)common_name; | |
80 | (void)auto_create; | |
81 | ||
82 | return (0); | |
83 | } | |
84 | ||
2c85b752 MS |
85 | |
86 | /* | |
87 | * 'httpCopyCredentials()' - Copy the credentials associated with the peer in | |
88 | * an encrypted connection. | |
89 | * | |
90 | * @since CUPS 1.5/OS X 10.7@ | |
91 | */ | |
92 | ||
93 | int /* O - Status of call (0 = success) */ | |
94 | httpCopyCredentials( | |
95 | http_t *http, /* I - Connection to server */ | |
96 | cups_array_t **credentials) /* O - Array of credentials */ | |
97 | { | |
98 | OSStatus error; /* Error code */ | |
99 | SecTrustRef peerTrust; /* Peer trust reference */ | |
100 | CFIndex count; /* Number of credentials */ | |
101 | SecCertificateRef secCert; /* Certificate reference */ | |
102 | CFDataRef data; /* Certificate data */ | |
103 | int i; /* Looping var */ | |
104 | ||
105 | ||
106 | if (credentials) | |
107 | *credentials = NULL; | |
108 | ||
109 | if (!http || !http->tls || !credentials) | |
110 | return (-1); | |
111 | ||
112 | if (!(error = SSLCopyPeerTrust(http->tls, &peerTrust)) && peerTrust) | |
113 | { | |
114 | if ((*credentials = cupsArrayNew(NULL, NULL)) != NULL) | |
115 | { | |
116 | count = SecTrustGetCertificateCount(peerTrust); | |
117 | ||
118 | for (i = 0; i < count; i ++) | |
119 | { | |
120 | secCert = SecTrustGetCertificateAtIndex(peerTrust, i); | |
121 | if ((data = SecCertificateCopyData(secCert))) | |
122 | { | |
123 | httpAddCredential(*credentials, CFDataGetBytePtr(data), | |
124 | CFDataGetLength(data)); | |
125 | CFRelease(data); | |
126 | } | |
127 | } | |
128 | } | |
129 | ||
130 | CFRelease(peerTrust); | |
131 | } | |
132 | ||
133 | return (error); | |
134 | } | |
135 | ||
136 | ||
137 | /* | |
138 | * '_httpCreateCredentials()' - Create credentials in the internal format. | |
139 | */ | |
140 | ||
141 | http_tls_credentials_t /* O - Internal credentials */ | |
142 | _httpCreateCredentials( | |
143 | cups_array_t *credentials) /* I - Array of credentials */ | |
144 | { | |
145 | CFMutableArrayRef peerCerts; /* Peer credentials reference */ | |
146 | SecCertificateRef secCert; /* Certificate reference */ | |
147 | CFDataRef data; /* Credential data reference */ | |
148 | http_credential_t *credential; /* Credential data */ | |
149 | ||
150 | ||
151 | if (!credentials) | |
152 | return (NULL); | |
153 | ||
154 | if ((peerCerts = CFArrayCreateMutable(kCFAllocatorDefault, | |
155 | cupsArrayCount(credentials), | |
156 | &kCFTypeArrayCallBacks)) == NULL) | |
157 | return (NULL); | |
158 | ||
159 | for (credential = (http_credential_t *)cupsArrayFirst(credentials); | |
160 | credential; | |
161 | credential = (http_credential_t *)cupsArrayNext(credentials)) | |
162 | { | |
163 | if ((data = CFDataCreate(kCFAllocatorDefault, credential->data, | |
164 | credential->datalen))) | |
165 | { | |
166 | if ((secCert = SecCertificateCreateWithData(kCFAllocatorDefault, data)) | |
167 | != NULL) | |
168 | { | |
169 | CFArrayAppendValue(peerCerts, secCert); | |
170 | CFRelease(secCert); | |
171 | } | |
172 | ||
173 | CFRelease(data); | |
174 | } | |
175 | } | |
176 | ||
177 | return (peerCerts); | |
178 | } | |
179 | ||
180 | ||
3af9ac9e MS |
181 | /* |
182 | * 'httpCredentialsAreTrusted()' - Return whether the credentials are trusted. | |
183 | * | |
184 | * @since CUPS 2.0@ | |
185 | */ | |
186 | ||
187 | int /* O - 1 if trusted, 0 if not/unknown */ | |
188 | httpCredentialsAreTrusted( | |
189 | cups_array_t *credentials) /* I - Credentials */ | |
190 | { | |
191 | (void)credentials; | |
192 | ||
193 | return (0); | |
194 | } | |
195 | ||
196 | ||
197 | /* | |
198 | * 'httpCredentialsGetExpiration()' - Return the expiration date of the credentials. | |
199 | * | |
200 | * @since CUPS 2.0@ | |
201 | */ | |
202 | ||
203 | time_t /* O - Expiration date of credentials */ | |
204 | httpCredentialsGetExpiration( | |
205 | cups_array_t *credentials) /* I - Credentials */ | |
206 | { | |
207 | (void)credentials; | |
208 | ||
209 | return (0); | |
210 | } | |
211 | ||
212 | ||
213 | /* | |
214 | * 'httpCredentialsIsValidName()' - Return whether the credentials are valid for the given name. | |
215 | * | |
216 | * @since CUPS 2.0@ | |
217 | */ | |
218 | ||
219 | int /* O - 1 if valid, 0 otherwise */ | |
220 | httpCredentialsIsValidName( | |
221 | cups_array_t *credentials, /* I - Credentials */ | |
222 | const char *common_name) /* I - Name to check */ | |
223 | { | |
224 | (void)credentials; | |
225 | (void)common_name; | |
226 | ||
227 | return (0); | |
228 | } | |
229 | ||
230 | ||
72d05bc9 MS |
231 | /* |
232 | * 'httpCredentialsString()' - Return a string representing the credentials. | |
233 | * | |
234 | * @since CUPS 2.0@ | |
235 | */ | |
236 | ||
237 | size_t /* O - Total size of credentials string */ | |
238 | httpCredentialsString( | |
239 | cups_array_t *credentials, /* I - Credentials */ | |
240 | char *buffer, /* I - Buffer or @code NULL@ */ | |
241 | size_t bufsize) /* I - Size of buffer */ | |
242 | { | |
243 | (void)credentials; | |
244 | ||
245 | if (buffer && bufsize > 0) | |
246 | *buffer = '\0'; | |
247 | ||
248 | return (1); | |
249 | } | |
250 | ||
251 | ||
2c85b752 MS |
252 | /* |
253 | * '_httpFreeCredentials()' - Free internal credentials. | |
254 | */ | |
255 | ||
256 | void | |
257 | _httpFreeCredentials( | |
258 | http_tls_credentials_t credentials) /* I - Internal credentials */ | |
259 | { | |
260 | if (!credentials) | |
261 | return; | |
262 | ||
263 | CFRelease(credentials); | |
264 | } | |
265 | ||
266 | ||
72d05bc9 MS |
267 | /* |
268 | * 'httpLoadCredentials()' - Load X.509 credentials from a keychain file. | |
269 | * | |
270 | * @since CUPS 2.0@ | |
271 | */ | |
272 | ||
dafebafd | 273 | int /* O - 0 on success, -1 on error */ |
72d05bc9 MS |
274 | httpLoadCredentials( |
275 | const char *path, /* I - Keychain/PKCS#12 path */ | |
276 | cups_array_t **credentials, /* IO - Credentials */ | |
277 | const char *common_name) /* I - Common name for credentials */ | |
278 | { | |
f4047845 MS |
279 | (void)path; |
280 | (void)credentials; | |
281 | (void)common_name; | |
282 | ||
283 | return (-1); | |
284 | ||
285 | #if 0 | |
dafebafd MS |
286 | OSStatus err; /* Error info */ |
287 | SecKeychainRef keychain = NULL;/* Keychain reference */ | |
288 | SecIdentitySearchRef search = NULL; /* Search reference */ | |
289 | SecIdentityRef identity = NULL;/* Identity */ | |
290 | CFArrayRef certificates = NULL; | |
291 | /* Certificate array */ | |
292 | SecPolicyRef policy = NULL; /* Policy ref */ | |
293 | CFStringRef cfcommon_name = NULL; | |
294 | /* Server name */ | |
295 | CFMutableDictionaryRef query = NULL; /* Query qualifiers */ | |
296 | CFArrayRef list = NULL; /* Keychain list */ | |
297 | ||
298 | ||
299 | if ((err = SecKeychainOpen(path, &keychain))) | |
300 | goto cleanup; | |
301 | ||
302 | cfcommon_name = CFStringCreateWithCString(kCFAllocatorDefault, common_name, kCFStringEncodingUTF8); | |
303 | ||
304 | policy = SecPolicyCreateSSL(1, cfcommon_name); | |
305 | ||
306 | if (cfcommon_name) | |
307 | CFRelease(cfcommon_name); | |
308 | ||
309 | if (!policy) | |
310 | goto cleanup; | |
311 | ||
312 | if (!(query = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks))) | |
313 | goto cleanup; | |
314 | ||
315 | list = CFArrayCreate(kCFAllocatorDefault, (const void **)&keychain, 1, | |
316 | &kCFTypeArrayCallBacks); | |
317 | ||
318 | CFDictionaryAddValue(query, kSecClass, kSecClassIdentity); | |
319 | CFDictionaryAddValue(query, kSecMatchPolicy, policy); | |
320 | CFDictionaryAddValue(query, kSecReturnRef, kCFBooleanTrue); | |
321 | CFDictionaryAddValue(query, kSecMatchLimit, kSecMatchLimitOne); | |
322 | CFDictionaryAddValue(query, kSecMatchSearchList, list); | |
323 | ||
324 | CFRelease(list); | |
325 | ||
326 | err = SecItemCopyMatching(query, (CFTypeRef *)&identity); | |
327 | ||
328 | if (err) | |
329 | goto cleanup; | |
330 | ||
331 | if (CFGetTypeID(identity) != SecIdentityGetTypeID()) | |
332 | goto cleanup; | |
333 | ||
334 | if ((certificates = CFArrayCreate(NULL, (const void **)&identity, 1, &kCFTypeArrayCallBacks)) == NULL) | |
335 | goto cleanup; | |
336 | ||
337 | cleanup : | |
338 | ||
339 | if (keychain) | |
340 | CFRelease(keychain); | |
341 | if (search) | |
342 | CFRelease(search); | |
343 | if (identity) | |
344 | CFRelease(identity); | |
345 | ||
346 | if (policy) | |
347 | CFRelease(policy); | |
348 | if (query) | |
349 | CFRelease(query); | |
350 | ||
351 | return (certificates); | |
f4047845 | 352 | #endif /* 0 */ |
72d05bc9 MS |
353 | } |
354 | ||
355 | ||
f4047845 | 356 | #if 0 |
72d05bc9 | 357 | /* |
3af9ac9e | 358 | * 'cupsMakeCredentials()' - Create self-signed credentials for the given |
72d05bc9 MS |
359 | * name. |
360 | * | |
361 | * @since CUPS 2.0@ | |
362 | */ | |
363 | ||
dafebafd | 364 | int /* O - 0 on success, -1 on error */ |
3af9ac9e | 365 | cupsMakeCredentials( |
dafebafd | 366 | const char *path, /* I - Keychain/PKCS#12 path */ |
72d05bc9 MS |
367 | cups_array_t **credentials, /* O - Credentials */ |
368 | const char *common_name) /* I - Common name for X.509 cert */ | |
369 | { | |
dafebafd MS |
370 | # ifdef HAVE_SECGENERATESELFSIGNEDCERTIFICATE |
371 | int status = -1; /* Return status */ | |
372 | OSStatus err; /* Error code (if any) */ | |
373 | CFStringRef cfcommon_name = NULL; | |
374 | /* CF string for server name */ | |
375 | SecIdentityRef ident = NULL; /* Identity */ | |
376 | SecKeyRef publicKey = NULL, | |
377 | /* Public key */ | |
378 | privateKey = NULL; | |
379 | /* Private key */ | |
380 | CFMutableDictionaryRef keyParams = NULL; | |
381 | /* Key generation parameters */ | |
382 | ||
72d05bc9 MS |
383 | |
384 | if (credentials) | |
385 | *credentials = NULL; | |
386 | ||
dafebafd MS |
387 | cfcommon_name = CFStringCreateWithCString(kCFAllocatorDefault, servername, |
388 | kCFStringEncodingUTF8); | |
389 | if (!cfcommon_name) | |
390 | goto cleanup; | |
391 | ||
392 | /* | |
393 | * Create a public/private key pair... | |
394 | */ | |
395 | ||
396 | keyParams = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, | |
397 | &kCFTypeDictionaryKeyCallBacks, | |
398 | &kCFTypeDictionaryValueCallBacks); | |
399 | if (!keyParams) | |
400 | goto cleanup; | |
401 | ||
402 | CFDictionaryAddValue(keyParams, kSecAttrKeyType, kSecAttrKeyTypeRSA); | |
403 | CFDictionaryAddValue(keyParams, kSecAttrKeySizeInBits, CFSTR("2048")); | |
404 | CFDictionaryAddValue(keyParams, kSecAttrLabel, | |
405 | CFSTR("CUPS Self-Signed Certificate")); | |
406 | ||
407 | err = SecKeyGeneratePair(keyParams, &publicKey, &privateKey); | |
408 | if (err != noErr) | |
409 | goto cleanup; | |
410 | ||
411 | /* | |
412 | * Create a self-signed certificate using the public/private key pair... | |
413 | */ | |
414 | ||
415 | CFIndex usageInt = kSecKeyUsageAll; | |
416 | CFNumberRef usage = CFNumberCreate(alloc, kCFNumberCFIndexType, &usageInt); | |
417 | CFDictionaryRef certParams = CFDictionaryCreateMutable(kCFAllocatorDefault, | |
418 | kSecCSRBasicContraintsPathLen, CFINT(0), kSecSubjectAltName, cfcommon_name, kSecCertificateKeyUsage, usage, NULL, NULL); | |
419 | CFRelease(usage); | |
420 | ||
421 | const void *ca_o[] = { kSecOidOrganization, CFSTR("") }; | |
422 | const void *ca_cn[] = { kSecOidCommonName, cfcommon_name }; | |
423 | CFArrayRef ca_o_dn = CFArrayCreate(kCFAllocatorDefault, ca_o, 2, NULL); | |
424 | CFArrayRef ca_cn_dn = CFArrayCreate(kCFAllocatorDefault, ca_cn, 2, NULL); | |
425 | const void *ca_dn_array[2]; | |
426 | ||
427 | ca_dn_array[0] = CFArrayCreate(kCFAllocatorDefault, (const void **)&ca_o_dn, 1, NULL); | |
428 | ca_dn_array[1] = CFArrayCreate(kCFAllocatorDefault, (const void **)&ca_cn_dn, 1, NULL); | |
429 | ||
430 | CFArrayRef subject = CFArrayCreate(kCFAllocatorDefault, ca_dn_array, 2, NULL); | |
431 | SecCertificateRef cert = SecGenerateSelfSignedCertificate(subject, certParams, publicKey, privateKey); | |
432 | CFRelease(subject); | |
433 | CFRelease(certParams); | |
434 | ||
435 | if (!cert) | |
436 | goto cleanup; | |
437 | ||
438 | ident = SecIdentityCreate(kCFAllocatorDefault, cert, privateKey); | |
439 | ||
440 | if (ident) | |
441 | status = 0; | |
442 | ||
443 | /* | |
444 | * Cleanup and return... | |
445 | */ | |
446 | ||
447 | cleanup: | |
448 | ||
449 | if (cfcommon_name) | |
450 | CFRelease(cfcommon_name); | |
451 | ||
452 | if (keyParams) | |
453 | CFRelease(keyParams); | |
454 | ||
455 | if (ident) | |
456 | CFRelease(ident); | |
457 | ||
458 | if (cert) | |
459 | CFRelease(cert); | |
460 | ||
461 | if (publicKey) | |
462 | CFRelease(publicKey); | |
463 | ||
464 | if (privateKey) | |
465 | CFRelease(publicKey); | |
466 | ||
467 | return (status); | |
468 | ||
469 | # else /* !HAVE_SECGENERATESELFSIGNEDCERTIFICATE */ | |
470 | int pid, /* Process ID of command */ | |
471 | status; /* Status of command */ | |
472 | char command[1024], /* Command */ | |
473 | *argv[4], /* Command-line arguments */ | |
474 | keychain[1024], /* Keychain argument */ | |
475 | infofile[1024]; /* Type-in information for cert */ | |
476 | cups_file_t *fp; /* Seed/info file */ | |
477 | ||
478 | ||
479 | /* | |
480 | * Run the "certtool" command to generate a self-signed certificate... | |
481 | */ | |
482 | ||
483 | if (!cupsFileFind("certtool", getenv("PATH"), 1, command, sizeof(command))) | |
484 | return (-1); | |
485 | ||
486 | /* | |
487 | * Create a file with the certificate information fields... | |
488 | * | |
489 | * Note: This assumes that the default questions are asked by the certtool | |
490 | * command... | |
491 | */ | |
492 | ||
493 | if ((fp = cupsTempFile2(infofile, sizeof(infofile))) == NULL) | |
494 | return (-1); | |
495 | ||
496 | cupsFilePrintf(fp, | |
497 | "%s\n" /* Enter key and certificate label */ | |
498 | "r\n" /* Generate RSA key pair */ | |
499 | "2048\n" /* Key size in bits */ | |
500 | "y\n" /* OK (y = yes) */ | |
501 | "b\n" /* Usage (b=signing/encryption) */ | |
502 | "s\n" /* Sign with SHA1 */ | |
503 | "y\n" /* OK (y = yes) */ | |
504 | "%s\n" /* Common name */ | |
505 | "\n" /* Country (default) */ | |
506 | "\n" /* Organization (default) */ | |
507 | "\n" /* Organizational unit (default) */ | |
508 | "\n" /* State/Province (default) */ | |
509 | "%s\n" /* Email address */ | |
510 | "y\n", /* OK (y = yes) */ | |
511 | common_name, common_name, ""); | |
512 | cupsFileClose(fp); | |
513 | ||
514 | snprintf(keychain, sizeof(keychain), "k=%s", path); | |
515 | ||
516 | argv[0] = "certtool"; | |
517 | argv[1] = "c"; | |
518 | argv[2] = keychain; | |
519 | argv[3] = NULL; | |
520 | ||
521 | posix_spawn_file_actions_t actions; /* File actions */ | |
522 | ||
523 | posix_spawn_file_actions_init(&actions); | |
524 | posix_spawn_file_actions_addclose(&actions, 0); | |
525 | posix_spawn_file_actions_addopen(&actions, 0, infofile, O_RDONLY, 0); | |
526 | ||
527 | if (posix_spawn(&pid, command, &actions, NULL, argv, environ)) | |
528 | { | |
529 | unlink(infofile); | |
530 | return (-1); | |
531 | } | |
532 | ||
533 | posix_spawn_file_actions_destroy(&actions); | |
534 | ||
535 | unlink(infofile); | |
536 | ||
537 | while (waitpid(pid, &status, 0) < 0) | |
538 | if (errno != EINTR) | |
539 | { | |
540 | status = -1; | |
541 | break; | |
542 | } | |
543 | ||
544 | if (status) | |
545 | return (-1); | |
546 | ||
547 | # endif /* HAVE_SECGENERATESELFSIGNEDCERTIFICATE */ | |
548 | ||
549 | return (httpLoadCredentials(path, credentials, common_name)); | |
72d05bc9 | 550 | } |
f4047845 | 551 | #endif /* 0 */ |
72d05bc9 MS |
552 | |
553 | ||
554 | /* | |
555 | * 'httpSaveCredentials()' - Save X.509 credentials to a keychain file. | |
556 | * | |
557 | * @since CUPS 2.0@ | |
558 | */ | |
559 | ||
560 | int /* O - -1 on error, 0 on success */ | |
561 | httpSaveCredentials( | |
562 | const char *path, /* I - Keychain/PKCS#12 path */ | |
563 | cups_array_t *credentials, /* I - Credentials */ | |
564 | const char *common_name) /* I - Common name for credentials */ | |
565 | { | |
566 | (void)path; | |
567 | (void)credentials; | |
568 | (void)common_name; | |
569 | ||
570 | return (-1); | |
571 | } | |
572 | ||
573 | ||
2c85b752 MS |
574 | /* |
575 | * 'http_cdsa_read()' - Read function for the CDSA library. | |
576 | */ | |
577 | ||
578 | static OSStatus /* O - -1 on error, 0 on success */ | |
579 | http_cdsa_read( | |
580 | SSLConnectionRef connection, /* I - SSL/TLS connection */ | |
581 | void *data, /* I - Data buffer */ | |
582 | size_t *dataLength) /* IO - Number of bytes */ | |
583 | { | |
584 | OSStatus result; /* Return value */ | |
585 | ssize_t bytes; /* Number of bytes read */ | |
586 | http_t *http; /* HTTP connection */ | |
587 | ||
588 | ||
589 | http = (http_t *)connection; | |
590 | ||
591 | if (!http->blocking) | |
592 | { | |
593 | /* | |
594 | * Make sure we have data before we read... | |
595 | */ | |
596 | ||
597 | while (!_httpWait(http, http->wait_value, 0)) | |
598 | { | |
599 | if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) | |
600 | continue; | |
601 | ||
602 | http->error = ETIMEDOUT; | |
603 | return (-1); | |
604 | } | |
605 | } | |
606 | ||
607 | do | |
608 | { | |
609 | bytes = recv(http->fd, data, *dataLength, 0); | |
610 | } | |
611 | while (bytes == -1 && (errno == EINTR || errno == EAGAIN)); | |
612 | ||
613 | if (bytes == *dataLength) | |
614 | { | |
615 | result = 0; | |
616 | } | |
617 | else if (bytes > 0) | |
618 | { | |
619 | *dataLength = bytes; | |
620 | result = errSSLWouldBlock; | |
621 | } | |
622 | else | |
623 | { | |
624 | *dataLength = 0; | |
625 | ||
626 | if (bytes == 0) | |
627 | result = errSSLClosedGraceful; | |
628 | else if (errno == EAGAIN) | |
629 | result = errSSLWouldBlock; | |
630 | else | |
631 | result = errSSLClosedAbort; | |
632 | } | |
633 | ||
634 | return (result); | |
635 | } | |
636 | ||
637 | ||
638 | /* | |
639 | * 'http_cdsa_write()' - Write function for the CDSA library. | |
640 | */ | |
641 | ||
642 | static OSStatus /* O - -1 on error, 0 on success */ | |
643 | http_cdsa_write( | |
644 | SSLConnectionRef connection, /* I - SSL/TLS connection */ | |
645 | const void *data, /* I - Data buffer */ | |
646 | size_t *dataLength) /* IO - Number of bytes */ | |
647 | { | |
648 | OSStatus result; /* Return value */ | |
649 | ssize_t bytes; /* Number of bytes read */ | |
650 | http_t *http; /* HTTP connection */ | |
651 | ||
652 | ||
653 | http = (http_t *)connection; | |
654 | ||
655 | do | |
656 | { | |
657 | bytes = write(http->fd, data, *dataLength); | |
658 | } | |
659 | while (bytes == -1 && (errno == EINTR || errno == EAGAIN)); | |
660 | ||
661 | if (bytes == *dataLength) | |
662 | { | |
663 | result = 0; | |
664 | } | |
665 | else if (bytes >= 0) | |
666 | { | |
667 | *dataLength = bytes; | |
668 | result = errSSLWouldBlock; | |
669 | } | |
670 | else | |
671 | { | |
672 | *dataLength = 0; | |
673 | ||
674 | if (errno == EAGAIN) | |
675 | result = errSSLWouldBlock; | |
676 | else | |
677 | result = errSSLClosedAbort; | |
678 | } | |
679 | ||
680 | return (result); | |
681 | } | |
682 | ||
683 | ||
684 | /* | |
685 | * 'http_tls_initialize()' - Initialize the TLS stack. | |
686 | */ | |
687 | ||
688 | static void | |
689 | http_tls_initialize(void) | |
690 | { | |
691 | /* | |
692 | * Nothing to do... | |
693 | */ | |
694 | } | |
695 | ||
696 | ||
697 | /* | |
698 | * 'http_tls_pending()' - Return the number of pending TLS-encrypted bytes. | |
699 | */ | |
700 | ||
701 | static size_t | |
702 | http_tls_pending(http_t *http) /* I - HTTP connection */ | |
703 | { | |
704 | size_t bytes; /* Bytes that are available */ | |
705 | ||
706 | ||
707 | if (!SSLGetBufferedReadSize(http->tls, &bytes)) | |
708 | return (bytes); | |
709 | ||
710 | return (0); | |
711 | } | |
712 | ||
713 | ||
714 | /* | |
715 | * 'http_tls_read()' - Read from a SSL/TLS connection. | |
716 | */ | |
717 | ||
718 | static int /* O - Bytes read */ | |
719 | http_tls_read(http_t *http, /* I - Connection to server */ | |
720 | char *buf, /* I - Buffer to store data */ | |
721 | int len) /* I - Length of buffer */ | |
722 | { | |
723 | int result; /* Return value */ | |
724 | OSStatus error; /* Error info */ | |
725 | size_t processed; /* Number of bytes processed */ | |
726 | ||
727 | ||
728 | error = SSLRead(http->tls, buf, len, &processed); | |
729 | DEBUG_printf(("6http_tls_read: error=%d, processed=%d", (int)error, | |
730 | (int)processed)); | |
731 | switch (error) | |
732 | { | |
733 | case 0 : | |
734 | result = (int)processed; | |
735 | break; | |
736 | ||
737 | case errSSLWouldBlock : | |
738 | if (processed) | |
739 | result = (int)processed; | |
740 | else | |
741 | { | |
742 | result = -1; | |
743 | errno = EINTR; | |
744 | } | |
745 | break; | |
746 | ||
747 | case errSSLClosedGraceful : | |
748 | default : | |
749 | if (processed) | |
750 | result = (int)processed; | |
751 | else | |
752 | { | |
753 | result = -1; | |
754 | errno = EPIPE; | |
755 | } | |
756 | break; | |
757 | } | |
758 | ||
759 | return (result); | |
760 | } | |
761 | ||
762 | ||
763 | /* | |
764 | * 'http_tls_set_credentials()' - Set the TLS credentials. | |
765 | */ | |
766 | ||
767 | static int /* O - Status of connection */ | |
768 | http_tls_set_credentials(http_t *http) /* I - Connection to server */ | |
769 | { | |
770 | _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */ | |
771 | OSStatus error = 0; /* Error code */ | |
772 | http_tls_credentials_t credentials = NULL; | |
773 | /* TLS credentials */ | |
774 | ||
775 | ||
776 | DEBUG_printf(("7http_tls_set_credentials(%p)", http)); | |
777 | ||
778 | /* | |
779 | * Prefer connection specific credentials... | |
780 | */ | |
781 | ||
782 | if ((credentials = http->tls_credentials) == NULL) | |
783 | credentials = cg->tls_credentials; | |
784 | ||
785 | if (credentials) | |
786 | { | |
787 | error = SSLSetCertificate(http->tls, credentials); | |
788 | DEBUG_printf(("4http_tls_set_credentials: SSLSetCertificate, error=%d", | |
789 | (int)error)); | |
790 | } | |
791 | else | |
792 | DEBUG_puts("4http_tls_set_credentials: No credentials to set."); | |
793 | ||
794 | return (error); | |
795 | } | |
796 | ||
797 | ||
798 | /* | |
799 | * 'http_tls_start()' - Set up SSL/TLS support on a connection. | |
800 | */ | |
801 | ||
802 | static int /* O - 0 on success, -1 on failure */ | |
803 | http_tls_start(http_t *http) /* I - Connection to server */ | |
804 | { | |
805 | char hostname[256], /* Hostname */ | |
806 | *hostptr; /* Pointer into hostname */ | |
807 | _cups_globals_t *cg = _cupsGlobals(); | |
808 | /* Pointer to library globals */ | |
809 | OSStatus error; /* Error code */ | |
810 | const char *message = NULL;/* Error message */ | |
811 | cups_array_t *credentials; /* Credentials array */ | |
812 | cups_array_t *names; /* CUPS distinguished names */ | |
813 | CFArrayRef dn_array; /* CF distinguished names array */ | |
814 | CFIndex count; /* Number of credentials */ | |
815 | CFDataRef data; /* Certificate data */ | |
816 | int i; /* Looping var */ | |
817 | http_credential_t *credential; /* Credential data */ | |
818 | ||
819 | ||
820 | DEBUG_printf(("7http_tls_start(http=%p)", http)); | |
821 | ||
822 | /* | |
823 | * Get the hostname to use for SSL... | |
824 | */ | |
825 | ||
826 | if (httpAddrLocalhost(http->hostaddr)) | |
827 | { | |
828 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
829 | } | |
830 | else | |
831 | { | |
832 | /* | |
833 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
834 | */ | |
835 | ||
836 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
837 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
838 | *hostptr == '.') | |
839 | *hostptr = '\0'; | |
840 | } | |
841 | ||
72d05bc9 | 842 | if ((http->tls = SSLCreateContext(kCFAllocatorDefault, http->mode == _HTTP_MODE_CLIENT ? kSSLClientSide : kSSLServerSide, kSSLStreamType)) == NULL) |
2c85b752 MS |
843 | { |
844 | DEBUG_puts("4http_tls_start: SSLCreateContext failed."); | |
845 | http->error = errno = ENOMEM; | |
846 | http->status = HTTP_STATUS_ERROR; | |
847 | _cupsSetHTTPError(HTTP_STATUS_ERROR); | |
848 | ||
849 | return (-1); | |
850 | } | |
851 | ||
852 | error = SSLSetConnection(http->tls, http); | |
853 | DEBUG_printf(("4http_tls_start: SSLSetConnection, error=%d", (int)error)); | |
854 | ||
855 | if (!error) | |
856 | { | |
857 | error = SSLSetIOFuncs(http->tls, http_cdsa_read, http_cdsa_write); | |
858 | DEBUG_printf(("4http_tls_start: SSLSetIOFuncs, error=%d", (int)error)); | |
859 | } | |
860 | ||
861 | if (!error) | |
862 | { | |
863 | error = SSLSetSessionOption(http->tls, kSSLSessionOptionBreakOnServerAuth, | |
864 | true); | |
865 | DEBUG_printf(("4http_tls_start: SSLSetSessionOption, error=%d", | |
866 | (int)error)); | |
867 | } | |
868 | ||
869 | if (!error) | |
870 | { | |
871 | if (cg->client_cert_cb) | |
872 | { | |
873 | error = SSLSetSessionOption(http->tls, | |
874 | kSSLSessionOptionBreakOnCertRequested, true); | |
875 | DEBUG_printf(("4http_tls_start: kSSLSessionOptionBreakOnCertRequested, " | |
876 | "error=%d", (int)error)); | |
877 | } | |
878 | else | |
879 | { | |
d3d89474 MS |
880 | error = http_tls_set_credentials(http); |
881 | DEBUG_printf(("4http_tls_start: http_tls_set_credentials, error=%d", | |
2c85b752 MS |
882 | (int)error)); |
883 | } | |
884 | } | |
885 | ||
886 | /* | |
887 | * Let the server know which hostname/domain we are trying to connect to | |
888 | * in case it wants to serve up a certificate with a matching common name. | |
889 | */ | |
890 | ||
891 | if (!error) | |
892 | { | |
893 | error = SSLSetPeerDomainName(http->tls, hostname, strlen(hostname)); | |
894 | ||
895 | DEBUG_printf(("4http_tls_start: SSLSetPeerDomainName, error=%d", | |
896 | (int)error)); | |
897 | } | |
898 | ||
899 | if (!error) | |
900 | { | |
901 | int done = 0; /* Are we done yet? */ | |
902 | ||
903 | while (!error && !done) | |
904 | { | |
905 | error = SSLHandshake(http->tls); | |
906 | ||
907 | DEBUG_printf(("4http_tls_start: SSLHandshake returned %d.", (int)error)); | |
908 | ||
909 | switch (error) | |
910 | { | |
911 | case noErr : | |
912 | done = 1; | |
913 | break; | |
914 | ||
915 | case errSSLWouldBlock : | |
916 | error = noErr; /* Force a retry */ | |
917 | usleep(1000); /* in 1 millisecond */ | |
918 | break; | |
919 | ||
920 | case errSSLServerAuthCompleted : | |
921 | error = 0; | |
922 | if (cg->server_cert_cb) | |
923 | { | |
924 | error = httpCopyCredentials(http, &credentials); | |
925 | if (!error) | |
926 | { | |
927 | error = (cg->server_cert_cb)(http, http->tls, credentials, | |
928 | cg->server_cert_data); | |
929 | httpFreeCredentials(credentials); | |
930 | } | |
931 | ||
932 | DEBUG_printf(("4http_tls_start: Server certificate callback " | |
933 | "returned %d.", (int)error)); | |
934 | } | |
935 | break; | |
936 | ||
937 | case errSSLClientCertRequested : | |
938 | error = 0; | |
939 | ||
940 | if (cg->client_cert_cb) | |
941 | { | |
942 | names = NULL; | |
943 | if (!(error = SSLCopyDistinguishedNames(http->tls, &dn_array)) && | |
944 | dn_array) | |
945 | { | |
946 | if ((names = cupsArrayNew(NULL, NULL)) != NULL) | |
947 | { | |
948 | for (i = 0, count = CFArrayGetCount(dn_array); i < count; i++) | |
949 | { | |
950 | data = (CFDataRef)CFArrayGetValueAtIndex(dn_array, i); | |
951 | ||
952 | if ((credential = malloc(sizeof(*credential))) != NULL) | |
953 | { | |
954 | credential->datalen = CFDataGetLength(data); | |
955 | if ((credential->data = malloc(credential->datalen))) | |
956 | { | |
957 | memcpy((void *)credential->data, CFDataGetBytePtr(data), | |
958 | credential->datalen); | |
959 | cupsArrayAdd(names, credential); | |
960 | } | |
961 | else | |
962 | free(credential); | |
963 | } | |
964 | } | |
965 | } | |
966 | ||
967 | CFRelease(dn_array); | |
968 | } | |
969 | ||
970 | if (!error) | |
971 | { | |
972 | error = (cg->client_cert_cb)(http, http->tls, names, | |
973 | cg->client_cert_data); | |
974 | ||
975 | DEBUG_printf(("4http_tls_start: Client certificate callback " | |
976 | "returned %d.", (int)error)); | |
977 | } | |
978 | ||
979 | httpFreeCredentials(names); | |
980 | } | |
981 | break; | |
982 | ||
983 | case errSSLUnknownRootCert : | |
984 | message = _("Unable to establish a secure connection to host " | |
985 | "(untrusted certificate)."); | |
986 | break; | |
987 | ||
988 | case errSSLNoRootCert : | |
989 | message = _("Unable to establish a secure connection to host " | |
990 | "(self-signed certificate)."); | |
991 | break; | |
992 | ||
993 | case errSSLCertExpired : | |
994 | message = _("Unable to establish a secure connection to host " | |
995 | "(expired certificate)."); | |
996 | break; | |
997 | ||
998 | case errSSLCertNotYetValid : | |
999 | message = _("Unable to establish a secure connection to host " | |
1000 | "(certificate not yet valid)."); | |
1001 | break; | |
1002 | ||
1003 | case errSSLHostNameMismatch : | |
1004 | message = _("Unable to establish a secure connection to host " | |
1005 | "(host name mismatch)."); | |
1006 | break; | |
1007 | ||
1008 | case errSSLXCertChainInvalid : | |
1009 | message = _("Unable to establish a secure connection to host " | |
1010 | "(certificate chain invalid)."); | |
1011 | break; | |
1012 | ||
1013 | case errSSLConnectionRefused : | |
1014 | message = _("Unable to establish a secure connection to host " | |
1015 | "(peer dropped connection before responding)."); | |
1016 | break; | |
1017 | ||
1018 | default : | |
1019 | break; | |
1020 | } | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | if (error) | |
1025 | { | |
1026 | http->error = error; | |
1027 | http->status = HTTP_STATUS_ERROR; | |
1028 | errno = ECONNREFUSED; | |
1029 | ||
1030 | CFRelease(http->tls); | |
1031 | http->tls = NULL; | |
1032 | ||
1033 | /* | |
1034 | * If an error string wasn't set by the callbacks use a generic one... | |
1035 | */ | |
1036 | ||
1037 | if (!message) | |
1038 | #ifdef HAVE_CSSMERRORSTRING | |
1039 | message = cssmErrorString(error); | |
1040 | #else | |
1041 | message = _("Unable to establish a secure connection to host."); | |
1042 | #endif /* HAVE_CSSMERRORSTRING */ | |
1043 | ||
1044 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, message, 1); | |
1045 | ||
1046 | return (-1); | |
1047 | } | |
1048 | ||
1049 | return (0); | |
1050 | } | |
1051 | ||
1052 | ||
1053 | /* | |
1054 | * 'http_tls_stop()' - Shut down SSL/TLS on a connection. | |
1055 | */ | |
1056 | ||
1057 | static void | |
1058 | http_tls_stop(http_t *http) /* I - Connection to server */ | |
1059 | { | |
1060 | while (SSLClose(http->tls) == errSSLWouldBlock) | |
1061 | usleep(1000); | |
1062 | ||
1063 | CFRelease(http->tls); | |
1064 | ||
1065 | if (http->tls_credentials) | |
1066 | CFRelease(http->tls_credentials); | |
1067 | ||
1068 | http->tls = NULL; | |
1069 | http->tls_credentials = NULL; | |
1070 | } | |
1071 | ||
1072 | ||
1073 | /* | |
1074 | * 'http_tls_write()' - Write to a SSL/TLS connection. | |
1075 | */ | |
1076 | ||
1077 | static int /* O - Bytes written */ | |
1078 | http_tls_write(http_t *http, /* I - Connection to server */ | |
1079 | const char *buf, /* I - Buffer holding data */ | |
1080 | int len) /* I - Length of buffer */ | |
1081 | { | |
1082 | ssize_t result; /* Return value */ | |
1083 | OSStatus error; /* Error info */ | |
1084 | size_t processed; /* Number of bytes processed */ | |
1085 | ||
1086 | ||
1087 | DEBUG_printf(("2http_tls_write(http=%p, buf=%p, len=%d)", http, buf, len)); | |
1088 | ||
1089 | error = SSLWrite(http->tls, buf, len, &processed); | |
1090 | ||
1091 | switch (error) | |
1092 | { | |
1093 | case 0 : | |
1094 | result = (int)processed; | |
1095 | break; | |
1096 | ||
1097 | case errSSLWouldBlock : | |
1098 | if (processed) | |
1099 | { | |
1100 | result = (int)processed; | |
1101 | } | |
1102 | else | |
1103 | { | |
1104 | result = -1; | |
1105 | errno = EINTR; | |
1106 | } | |
1107 | break; | |
1108 | ||
1109 | case errSSLClosedGraceful : | |
1110 | default : | |
1111 | if (processed) | |
1112 | { | |
1113 | result = (int)processed; | |
1114 | } | |
1115 | else | |
1116 | { | |
1117 | result = -1; | |
1118 | errno = EPIPE; | |
1119 | } | |
1120 | break; | |
1121 | } | |
1122 | ||
1123 | DEBUG_printf(("3http_tls_write: Returning %d.", (int)result)); | |
1124 | ||
1125 | return ((int)result); | |
1126 | } | |
1127 | ||
1128 | ||
d3d89474 | 1129 | #if 0 |
2c85b752 MS |
1130 | /* |
1131 | * 'cupsdEndTLS()' - Shutdown a secure session with the client. | |
1132 | */ | |
1133 | ||
1134 | int /* O - 1 on success, 0 on error */ | |
1135 | cupsdEndTLS(cupsd_client_t *con) /* I - Client connection */ | |
1136 | { | |
1137 | while (SSLClose(con->http.tls) == errSSLWouldBlock) | |
1138 | usleep(1000); | |
1139 | ||
1140 | CFRelease(con->http.tls); | |
1141 | con->http.tls = NULL; | |
1142 | ||
1143 | if (con->http.tls_credentials) | |
1144 | CFRelease(con->http.tls_credentials); | |
1145 | ||
1146 | return (1); | |
1147 | } | |
1148 | ||
1149 | ||
1150 | /* | |
1151 | * 'cupsdStartTLS()' - Start a secure session with the client. | |
1152 | */ | |
1153 | ||
1154 | int /* O - 1 on success, 0 on error */ | |
1155 | cupsdStartTLS(cupsd_client_t *con) /* I - Client connection */ | |
1156 | { | |
1157 | OSStatus error = 0; /* Error code */ | |
1158 | SecTrustRef peerTrust; /* Peer certificates */ | |
1159 | ||
1160 | ||
1161 | cupsdLogMessage(CUPSD_LOG_DEBUG, "[Client %d] Encrypting connection.", | |
1162 | con->http.fd); | |
1163 | ||
1164 | con->http.tls_credentials = copy_cdsa_certificate(con); | |
1165 | ||
1166 | if (!con->http.tls_credentials) | |
1167 | { | |
1168 | /* | |
1169 | * No keychain (yet), make a self-signed certificate... | |
1170 | */ | |
1171 | ||
1172 | if (make_certificate(con)) | |
1173 | con->http.tls_credentials = copy_cdsa_certificate(con); | |
1174 | } | |
1175 | ||
1176 | if (!con->http.tls_credentials) | |
1177 | { | |
1178 | cupsdLogMessage(CUPSD_LOG_ERROR, | |
1179 | "Could not find signing key in keychain \"%s\"", | |
1180 | ServerCertificate); | |
1181 | error = errSSLBadConfiguration; | |
1182 | } | |
1183 | ||
1184 | if (!error) | |
1185 | con->http.tls = SSLCreateContext(kCFAllocatorDefault, kSSLServerSide, | |
1186 | kSSLStreamType); | |
1187 | ||
1188 | if (!error) | |
1189 | error = SSLSetIOFuncs(con->http.tls, http_cdsa_read, http_cdsa_write); | |
1190 | ||
1191 | if (!error) | |
1192 | error = SSLSetConnection(con->http.tls, HTTP(con)); | |
1193 | ||
1194 | if (!error) | |
1195 | error = SSLSetCertificate(con->http.tls, con->http.tls_credentials); | |
1196 | ||
1197 | if (!error) | |
1198 | { | |
1199 | /* | |
1200 | * Perform SSL/TLS handshake | |
1201 | */ | |
1202 | ||
1203 | while ((error = SSLHandshake(con->http.tls)) == errSSLWouldBlock) | |
1204 | usleep(1000); | |
1205 | } | |
1206 | ||
1207 | if (error) | |
1208 | { | |
1209 | cupsdLogMessage(CUPSD_LOG_ERROR, | |
1210 | "Unable to encrypt connection from %s - %s (%d)", | |
1211 | con->http.hostname, cssmErrorString(error), (int)error); | |
1212 | ||
1213 | con->http.error = error; | |
1214 | con->http.status = HTTP_ERROR; | |
1215 | ||
1216 | if (con->http.tls) | |
1217 | { | |
1218 | CFRelease(con->http.tls); | |
1219 | con->http.tls = NULL; | |
1220 | } | |
1221 | ||
1222 | if (con->http.tls_credentials) | |
1223 | { | |
1224 | CFRelease(con->http.tls_credentials); | |
1225 | con->http.tls_credentials = NULL; | |
1226 | } | |
1227 | ||
1228 | return (0); | |
1229 | } | |
1230 | ||
1231 | cupsdLogMessage(CUPSD_LOG_DEBUG, "Connection from %s now encrypted.", | |
1232 | con->http.hostname); | |
1233 | ||
1234 | if (!SSLCopyPeerTrust(con->http.tls, &peerTrust) && peerTrust) | |
1235 | { | |
1236 | cupsdLogMessage(CUPSD_LOG_DEBUG, "Received %d peer certificates.", | |
1237 | (int)SecTrustGetCertificateCount(peerTrust)); | |
1238 | CFRelease(peerTrust); | |
1239 | } | |
1240 | else | |
1241 | cupsdLogMessage(CUPSD_LOG_DEBUG, "Received NO peer certificates."); | |
1242 | ||
1243 | return (1); | |
1244 | } | |
d3d89474 | 1245 | #endif /* 0 */ |
2c85b752 MS |
1246 | |
1247 | ||
1248 | /* | |
1249 | * End of "$Id$". | |
1250 | */ |