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1 | /* | |
2 | * "$Id$" | |
3 | * | |
4 | * TLS support for CUPS on Windows using SSPI. | |
5 | * | |
6 | * Copyright 2010-2014 by Apple Inc. | |
7 | * | |
8 | * These coded instructions, statements, and computer programs are the | |
9 | * property of Apple Inc. and are protected by Federal copyright | |
10 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
11 | * which should have been included with this file. If this file is | |
12 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
13 | * | |
14 | * This file is subject to the Apple OS-Developed Software exception. | |
15 | */ | |
16 | ||
17 | /* | |
18 | * Include necessary headers... | |
19 | */ | |
20 | ||
21 | #include "debug-private.h" | |
22 | ||
23 | ||
24 | /* | |
25 | * Include necessary libraries... | |
26 | */ | |
27 | ||
28 | #pragma comment(lib, "Crypt32.lib") | |
29 | #pragma comment(lib, "Secur32.lib") | |
30 | #pragma comment(lib, "Ws2_32.lib") | |
31 | ||
32 | ||
33 | /* | |
34 | * Constants... | |
35 | */ | |
36 | ||
37 | #ifndef SECURITY_FLAG_IGNORE_UNKNOWN_CA | |
38 | # define SECURITY_FLAG_IGNORE_UNKNOWN_CA 0x00000100 /* Untrusted root */ | |
39 | #endif /* SECURITY_FLAG_IGNORE_UNKNOWN_CA */ | |
40 | ||
41 | #ifndef SECURITY_FLAG_IGNORE_CERT_DATE_INVALID | |
42 | # define SECURITY_FLAG_IGNORE_CERT_DATE_INVALID 0x00002000 /* Expired X509 Cert. */ | |
43 | #endif /* !SECURITY_FLAG_IGNORE_CERT_DATE_INVALID */ | |
44 | ||
45 | /* | |
46 | * Local functions... | |
47 | */ | |
48 | ||
49 | static _http_sspi_t *http_sspi_alloc(void); | |
50 | static int http_sspi_client(http_t *http, const char *hostname); | |
51 | static void http_sspi_free(_http_sspi_t *conn); | |
52 | static BOOL http_sspi_get_credentials(_http_sspi_t *conn, const LPWSTR containerName, const TCHAR *commonName, BOOL server); | |
53 | static int http_sspi_server(http_t *http, const char *hostname); | |
54 | static void http_sspi_set_allows_any_root(_http_sspi_t *conn, BOOL allow); | |
55 | static void http_sspi_set_allows_expired_certs(_http_sspi_t *conn, BOOL allow); | |
56 | static DWORD http_sspi_verify(PCCERT_CONTEXT cert, const char *common_name, DWORD dwCertFlags); | |
57 | ||
58 | ||
59 | /* | |
60 | * 'cupsMakeServerCredentials()' - Make a self-signed certificate and private key pair. | |
61 | * | |
62 | * @since CUPS 2.0@ | |
63 | */ | |
64 | ||
65 | int /* O - 1 on success, 0 on failure */ | |
66 | cupsMakeServerCredentials( | |
67 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
68 | const char *common_name, /* I - Common name */ | |
69 | int num_alt_names, /* I - Number of subject alternate names */ | |
70 | const char **alt_names, /* I - Subject Alternate Names */ | |
71 | time_t expiration_date) /* I - Expiration date */ | |
72 | { | |
73 | 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)); | |
74 | ||
75 | (void)path; | |
76 | (void)common_name; | |
77 | (void)num_alt_names; | |
78 | (void)alt_names; | |
79 | (void)expiration_date; | |
80 | ||
81 | return (0); | |
82 | } | |
83 | ||
84 | ||
85 | /* | |
86 | * 'cupsSetServerCredentials()' - Set the default server credentials. | |
87 | * | |
88 | * Note: The server credentials are used by all threads in the running process. | |
89 | * This function is threadsafe. | |
90 | * | |
91 | * @since CUPS 2.0@ | |
92 | */ | |
93 | ||
94 | int /* O - 1 on success, 0 on failure */ | |
95 | cupsSetServerCredentials( | |
96 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
97 | const char *common_name, /* I - Default common name for server */ | |
98 | int auto_create) /* I - 1 = automatically create self-signed certificates */ | |
99 | { | |
100 | DEBUG_printf(("cupsSetServerCredentials(path=\"%s\", common_name=\"%s\", auto_create=%d)", path, common_name, auto_create)); | |
101 | ||
102 | (void)path; | |
103 | (void)common_name; | |
104 | (void)auto_create; | |
105 | ||
106 | return (0); | |
107 | } | |
108 | ||
109 | ||
110 | /* | |
111 | * 'httpCopyCredentials()' - Copy the credentials associated with the peer in | |
112 | * an encrypted connection. | |
113 | * | |
114 | * @since CUPS 1.5/OS X 10.7@ | |
115 | */ | |
116 | ||
117 | int /* O - Status of call (0 = success) */ | |
118 | httpCopyCredentials( | |
119 | http_t *http, /* I - Connection to server */ | |
120 | cups_array_t **credentials) /* O - Array of credentials */ | |
121 | { | |
122 | DEBUG_printf(("httpCopyCredentials(http=%p, credentials=%p)", http, credentials)); | |
123 | ||
124 | (void)http; | |
125 | ||
126 | if (credentials) | |
127 | *credentials = NULL; | |
128 | ||
129 | return (-1); | |
130 | } | |
131 | ||
132 | ||
133 | /* | |
134 | * '_httpCreateCredentials()' - Create credentials in the internal format. | |
135 | */ | |
136 | ||
137 | http_tls_credentials_t /* O - Internal credentials */ | |
138 | _httpCreateCredentials( | |
139 | cups_array_t *credentials) /* I - Array of credentials */ | |
140 | { | |
141 | (void)credentials; | |
142 | ||
143 | return (NULL); | |
144 | } | |
145 | ||
146 | ||
147 | /* | |
148 | * 'httpCredentialsAreValidForName()' - Return whether the credentials are valid for the given name. | |
149 | * | |
150 | * @since CUPS 2.0@ | |
151 | */ | |
152 | ||
153 | int /* O - 1 if valid, 0 otherwise */ | |
154 | httpCredentialsAreValidForName( | |
155 | cups_array_t *credentials, /* I - Credentials */ | |
156 | const char *common_name) /* I - Name to check */ | |
157 | { | |
158 | (void)credentials; | |
159 | (void)common_name; | |
160 | ||
161 | return (1); | |
162 | } | |
163 | ||
164 | ||
165 | /* | |
166 | * 'httpCredentialsGetTrust()' - Return the trust of credentials. | |
167 | * | |
168 | * @since CUPS 2.0@ | |
169 | */ | |
170 | ||
171 | http_trust_t /* O - Level of trust */ | |
172 | httpCredentialsGetTrust( | |
173 | cups_array_t *credentials, /* I - Credentials */ | |
174 | const char *common_name) /* I - Common name for trust lookup */ | |
175 | { | |
176 | http_trust_t trust = HTTP_TRUST_OK; | |
177 | /* Trusted? */ | |
178 | cups_array_t *tcreds = NULL; /* Trusted credentials */ | |
179 | _cups_globals_t *cg = _cupsGlobals(); | |
180 | /* Per-thread globals */ | |
181 | ||
182 | ||
183 | if (!common_name) | |
184 | return (HTTP_TRUST_UNKNOWN); | |
185 | ||
186 | /* | |
187 | * Look this common name up in the default keychains... | |
188 | */ | |
189 | ||
190 | httpLoadCredentials(NULL, &tcreds, common_name); | |
191 | ||
192 | if (tcreds) | |
193 | { | |
194 | char credentials_str[1024], /* String for incoming credentials */ | |
195 | tcreds_str[1024]; /* String for saved credentials */ | |
196 | ||
197 | httpCredentialsString(credentials, credentials_str, sizeof(credentials_str)); | |
198 | httpCredentialsString(tcreds, tcreds_str, sizeof(tcreds_str)); | |
199 | ||
200 | if (strcmp(credentials_str, tcreds_str)) | |
201 | { | |
202 | /* | |
203 | * Credentials don't match, let's look at the expiration date of the new | |
204 | * credentials and allow if the new ones have a later expiration... | |
205 | */ | |
206 | ||
207 | if (httpCredentialsGetExpiration(credentials) <= httpCredentialsGetExpiration(tcreds) || | |
208 | !httpCredentialsAreValidForName(credentials, common_name)) | |
209 | { | |
210 | /* | |
211 | * Either the new credentials are not newly issued, or the common name | |
212 | * does not match the issued certificate... | |
213 | */ | |
214 | ||
215 | trust = HTTP_TRUST_INVALID; | |
216 | } | |
217 | else if (httpCredentialsGetExpiration(tcreds) < time(NULL)) | |
218 | { | |
219 | /* | |
220 | * Save the renewed credentials... | |
221 | */ | |
222 | ||
223 | trust = HTTP_TRUST_RENEWED; | |
224 | ||
225 | httpSaveCredentials(NULL, credentials, common_name); | |
226 | } | |
227 | } | |
228 | ||
229 | httpFreeCredentials(tcreds); | |
230 | } | |
231 | else if (cg->validate_certs && !httpCredentialsAreValidForName(credentials, common_name)) | |
232 | trust = HTTP_TRUST_INVALID; | |
233 | ||
234 | if (!cg->expired_certs && time(NULL) > httpCredentialsGetExpiration(credentials)) | |
235 | trust = HTTP_TRUST_EXPIRED; | |
236 | else if (!cg->any_root && cupsArrayCount(credentials) == 1) | |
237 | trust = HTTP_TRUST_INVALID; | |
238 | ||
239 | return (trust); | |
240 | } | |
241 | ||
242 | ||
243 | /* | |
244 | * 'httpCredentialsGetExpiration()' - Return the expiration date of the credentials. | |
245 | * | |
246 | * @since CUPS 2.0@ | |
247 | */ | |
248 | ||
249 | time_t /* O - Expiration date of credentials */ | |
250 | httpCredentialsGetExpiration( | |
251 | cups_array_t *credentials) /* I - Credentials */ | |
252 | { | |
253 | (void)credentials; | |
254 | ||
255 | return (INT_MAX); | |
256 | } | |
257 | ||
258 | ||
259 | /* | |
260 | * 'httpCredentialsString()' - Return a string representing the credentials. | |
261 | * | |
262 | * @since CUPS 2.0@ | |
263 | */ | |
264 | ||
265 | size_t /* O - Total size of credentials string */ | |
266 | httpCredentialsString( | |
267 | cups_array_t *credentials, /* I - Credentials */ | |
268 | char *buffer, /* I - Buffer or @code NULL@ */ | |
269 | size_t bufsize) /* I - Size of buffer */ | |
270 | { | |
271 | DEBUG_printf(("httpCredentialsString(credentials=%p, buffer=%p, bufsize=" CUPS_LLFMT ")", credentials, buffer, CUPS_LLCAST bufsize)); | |
272 | ||
273 | if (!buffer) | |
274 | return (0); | |
275 | ||
276 | if (buffer && bufsize > 0) | |
277 | *buffer = '\0'; | |
278 | ||
279 | #if 0 | |
280 | http_credential_t *first; /* First certificate */ | |
281 | SecCertificateRef secCert; /* Certificate reference */ | |
282 | ||
283 | ||
284 | if ((first = (http_credential_t *)cupsArrayFirst(credentials)) != NULL && | |
285 | (secCert = http_cdsa_create_credential(first)) != NULL) | |
286 | { | |
287 | CFStringRef cf_name; /* CF common name string */ | |
288 | char name[256]; /* Common name associated with cert */ | |
289 | time_t expiration; /* Expiration date of cert */ | |
290 | _cups_md5_state_t md5_state; /* MD5 state */ | |
291 | unsigned char md5_digest[16]; /* MD5 result */ | |
292 | ||
293 | if ((cf_name = SecCertificateCopySubjectSummary(secCert)) != NULL) | |
294 | { | |
295 | CFStringGetCString(cf_name, name, (CFIndex)sizeof(name), kCFStringEncodingUTF8); | |
296 | CFRelease(cf_name); | |
297 | } | |
298 | else | |
299 | strlcpy(name, "unknown", sizeof(name)); | |
300 | ||
301 | expiration = (time_t)(SecCertificateNotValidAfter(secCert) + kCFAbsoluteTimeIntervalSince1970); | |
302 | ||
303 | _cupsMD5Init(&md5_state); | |
304 | _cupsMD5Append(&md5_state, first->data, (int)first->datalen); | |
305 | _cupsMD5Finish(&md5_state, md5_digest); | |
306 | ||
307 | 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]); | |
308 | ||
309 | CFRelease(secCert); | |
310 | } | |
311 | #endif /* 0 */ | |
312 | ||
313 | DEBUG_printf(("1httpCredentialsString: Returning \"%s\".", buffer)); | |
314 | ||
315 | return (strlen(buffer)); | |
316 | } | |
317 | ||
318 | ||
319 | /* | |
320 | * '_httpFreeCredentials()' - Free internal credentials. | |
321 | */ | |
322 | ||
323 | void | |
324 | _httpFreeCredentials( | |
325 | http_tls_credentials_t credentials) /* I - Internal credentials */ | |
326 | { | |
327 | if (!credentials) | |
328 | return; | |
329 | } | |
330 | ||
331 | ||
332 | /* | |
333 | * 'httpLoadCredentials()' - Load X.509 credentials from a keychain file. | |
334 | * | |
335 | * @since CUPS 2.0@ | |
336 | */ | |
337 | ||
338 | int /* O - 0 on success, -1 on error */ | |
339 | httpLoadCredentials( | |
340 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
341 | cups_array_t **credentials, /* IO - Credentials */ | |
342 | const char *common_name) /* I - Common name for credentials */ | |
343 | { | |
344 | DEBUG_printf(("httpLoadCredentials(path=\"%s\", credentials=%p, common_name=\"%s\")", path, credentials, common_name)); | |
345 | ||
346 | (void)path; | |
347 | (void)common_name; | |
348 | ||
349 | if (credentials) | |
350 | *credentials = NULL; | |
351 | ||
352 | DEBUG_printf(("1httpLoadCredentials: Returning %d.", *credentials ? 0 : -1)); | |
353 | ||
354 | return (*credentials ? 0 : -1); | |
355 | } | |
356 | ||
357 | ||
358 | /* | |
359 | * 'httpSaveCredentials()' - Save X.509 credentials to a keychain file. | |
360 | * | |
361 | * @since CUPS 2.0@ | |
362 | */ | |
363 | ||
364 | int /* O - -1 on error, 0 on success */ | |
365 | httpSaveCredentials( | |
366 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
367 | cups_array_t *credentials, /* I - Credentials */ | |
368 | const char *common_name) /* I - Common name for credentials */ | |
369 | { | |
370 | DEBUG_printf(("httpSaveCredentials(path=\"%s\", credentials=%p, common_name=\"%s\")", path, credentials, common_name)); | |
371 | ||
372 | (void)path; | |
373 | (void)credentials; | |
374 | (void)common_name; | |
375 | ||
376 | DEBUG_printf(("1httpSaveCredentials: Returning %d.", -1)); | |
377 | return (-1); | |
378 | } | |
379 | ||
380 | ||
381 | /* | |
382 | * '_httpTLSInitialize()' - Initialize the TLS stack. | |
383 | */ | |
384 | ||
385 | void | |
386 | _httpTLSInitialize(void) | |
387 | { | |
388 | /* | |
389 | * Nothing to do... | |
390 | */ | |
391 | } | |
392 | ||
393 | ||
394 | /* | |
395 | * '_httpTLSPending()' - Return the number of pending TLS-encrypted bytes. | |
396 | */ | |
397 | ||
398 | size_t /* O - Bytes available */ | |
399 | _httpTLSPending(http_t *http) /* I - HTTP connection */ | |
400 | { | |
401 | if (http->tls) | |
402 | return (http->tls->readBufferUsed); | |
403 | else | |
404 | return (0); | |
405 | } | |
406 | ||
407 | ||
408 | /* | |
409 | * '_httpTLSRead()' - Read from a SSL/TLS connection. | |
410 | */ | |
411 | ||
412 | int /* O - Bytes read */ | |
413 | _httpTLSRead(http_t *http, /* I - HTTP connection */ | |
414 | char *buf, /* I - Buffer to store data */ | |
415 | int len) /* I - Length of buffer */ | |
416 | { | |
417 | int i; /* Looping var */ | |
418 | _http_sspi_t *conn = http->tls; /* SSPI data */ | |
419 | SecBufferDesc message; /* Array of SecBuffer struct */ | |
420 | SecBuffer buffers[4] = { 0 }; /* Security package buffer */ | |
421 | int num = 0; /* Return value */ | |
422 | PSecBuffer pDataBuffer; /* Data buffer */ | |
423 | PSecBuffer pExtraBuffer; /* Excess data buffer */ | |
424 | SECURITY_STATUS scRet; /* SSPI status */ | |
425 | ||
426 | ||
427 | if (!conn) | |
428 | { | |
429 | WSASetLastError(WSAEINVAL); | |
430 | return (-1); | |
431 | } | |
432 | ||
433 | /* | |
434 | * If there are bytes that have already been decrypted and have not yet been | |
435 | * read, return those... | |
436 | */ | |
437 | ||
438 | if (conn->readBufferUsed > 0) | |
439 | { | |
440 | int bytesToCopy = min(conn->readBufferUsed, len); | |
441 | /* Number of bytes to copy */ | |
442 | ||
443 | memcpy(buf, conn->readBuffer, bytesToCopy); | |
444 | conn->readBufferUsed -= bytesToCopy; | |
445 | ||
446 | if (conn->readBufferUsed > 0) | |
447 | memmove(conn->readBuffer, conn->readBuffer + bytesToCopy, conn->readBufferUsed); | |
448 | ||
449 | return (bytesToCopy); | |
450 | } | |
451 | ||
452 | /* | |
453 | * Initialize security buffer structs | |
454 | */ | |
455 | ||
456 | message.ulVersion = SECBUFFER_VERSION; | |
457 | message.cBuffers = 4; | |
458 | message.pBuffers = buffers; | |
459 | ||
460 | do | |
461 | { | |
462 | /* | |
463 | * If there is not enough space in the buffer, then increase its size... | |
464 | */ | |
465 | ||
466 | if (conn->decryptBufferLength <= conn->decryptBufferUsed) | |
467 | { | |
468 | BYTE *temp; /* New buffer */ | |
469 | ||
470 | if (conn->decryptBufferLength >= 262144) | |
471 | { | |
472 | WSASetLastError(E_OUTOFMEMORY); | |
473 | DEBUG_puts("_httpTLSRead: Decryption buffer too large (>256k)"); | |
474 | return (-1); | |
475 | } | |
476 | ||
477 | if ((temp = realloc(conn->decryptBuffer, conn->decryptBufferLength + 4096)) == NULL) | |
478 | { | |
479 | DEBUG_printf(("_httpTLSRead: Unable to allocate %d byte buffer.", conn->decryptBufferLength + 4096)); | |
480 | WSASetLastError(E_OUTOFMEMORY); | |
481 | return (-1); | |
482 | } | |
483 | ||
484 | conn->decryptBufferLength += 4096; | |
485 | conn->decryptBuffer = temp; | |
486 | } | |
487 | ||
488 | buffers[0].pvBuffer = conn->decryptBuffer; | |
489 | buffers[0].cbBuffer = (unsigned long) conn->decryptBufferUsed; | |
490 | buffers[0].BufferType = SECBUFFER_DATA; | |
491 | buffers[1].BufferType = SECBUFFER_EMPTY; | |
492 | buffers[2].BufferType = SECBUFFER_EMPTY; | |
493 | buffers[3].BufferType = SECBUFFER_EMPTY; | |
494 | ||
495 | scRet = DecryptMessage(&conn->context, &message, 0, NULL); | |
496 | ||
497 | if (scRet == SEC_E_INCOMPLETE_MESSAGE) | |
498 | { | |
499 | num = recv(http->fd, conn->decryptBuffer + conn->decryptBufferUsed, (int)(conn->decryptBufferLength - conn->decryptBufferUsed), 0); | |
500 | if (num < 0) | |
501 | { | |
502 | DEBUG_printf(("_httpTLSRead: recv failed: %d", WSAGetLastError())); | |
503 | return (-1); | |
504 | } | |
505 | else if (num == 0) | |
506 | { | |
507 | DEBUG_puts("_httpTLSRead: Server disconnected."); | |
508 | return (0); | |
509 | } | |
510 | ||
511 | conn->decryptBufferUsed += num; | |
512 | } | |
513 | } | |
514 | while (scRet == SEC_E_INCOMPLETE_MESSAGE); | |
515 | ||
516 | if (scRet == SEC_I_CONTEXT_EXPIRED) | |
517 | { | |
518 | DEBUG_puts("_httpTLSRead: Context expired."); | |
519 | WSASetLastError(WSAECONNRESET); | |
520 | return (-1); | |
521 | } | |
522 | else if (scRet != SEC_E_OK) | |
523 | { | |
524 | DEBUG_printf(("_httpTLSRead: DecryptMessage failed: %lx", scRet)); | |
525 | WSASetLastError(WSASYSCALLFAILURE); | |
526 | return (-1); | |
527 | } | |
528 | ||
529 | /* | |
530 | * The decryption worked. Now, locate data buffer. | |
531 | */ | |
532 | ||
533 | pDataBuffer = NULL; | |
534 | pExtraBuffer = NULL; | |
535 | ||
536 | for (i = 1; i < 4; i++) | |
537 | { | |
538 | if (buffers[i].BufferType == SECBUFFER_DATA) | |
539 | pDataBuffer = &buffers[i]; | |
540 | else if (!pExtraBuffer && (buffers[i].BufferType == SECBUFFER_EXTRA)) | |
541 | pExtraBuffer = &buffers[i]; | |
542 | } | |
543 | ||
544 | /* | |
545 | * If a data buffer is found, then copy the decrypted bytes to the passed-in | |
546 | * buffer... | |
547 | */ | |
548 | ||
549 | if (pDataBuffer) | |
550 | { | |
551 | int bytesToCopy = min((int)pDataBuffer->cbBuffer, len); | |
552 | /* Number of bytes to copy into buf */ | |
553 | int bytesToSave = pDataBuffer->cbBuffer - bytesToCopy; | |
554 | /* Number of bytes to save in our read buffer */ | |
555 | ||
556 | if (bytesToCopy) | |
557 | memcpy(buf, pDataBuffer->pvBuffer, bytesToCopy); | |
558 | ||
559 | /* | |
560 | * If there are more decrypted bytes than can be copied to the passed in | |
561 | * buffer, then save them... | |
562 | */ | |
563 | ||
564 | if (bytesToSave) | |
565 | { | |
566 | if ((conn->readBufferLength - conn->readBufferUsed) < bytesToSave) | |
567 | { | |
568 | BYTE *temp; /* New buffer pointer */ | |
569 | ||
570 | if ((temp = realloc(conn->readBuffer, conn->readBufferUsed + bytesToSave)) == NULL) | |
571 | { | |
572 | DEBUG_printf(("_httpTLSRead: Unable to allocate %d bytes.", conn->readBufferUsed + bytesToSave)); | |
573 | WSASetLastError(E_OUTOFMEMORY); | |
574 | return (-1); | |
575 | } | |
576 | ||
577 | conn->readBufferLength = conn->readBufferUsed + bytesToSave; | |
578 | conn->readBuffer = temp; | |
579 | } | |
580 | ||
581 | memcpy(((BYTE *)conn->readBuffer) + conn->readBufferUsed, ((BYTE *)pDataBuffer->pvBuffer) + bytesToCopy, bytesToSave); | |
582 | ||
583 | conn->readBufferUsed += bytesToSave; | |
584 | } | |
585 | ||
586 | return (bytesToCopy); | |
587 | } | |
588 | else | |
589 | { | |
590 | DEBUG_puts("_httpTLSRead: Unable to find data buffer."); | |
591 | WSASetLastError(WSASYSCALLFAILURE); | |
592 | return (-1); | |
593 | } | |
594 | ||
595 | /* | |
596 | * If the decryption process left extra bytes, then save those back in | |
597 | * decryptBuffer. They will be processed the next time through the loop. | |
598 | */ | |
599 | ||
600 | if (pExtraBuffer) | |
601 | { | |
602 | memmove(conn->decryptBuffer, pExtraBuffer->pvBuffer, pExtraBuffer->cbBuffer); | |
603 | conn->decryptBufferUsed = pExtraBuffer->cbBuffer; | |
604 | } | |
605 | else | |
606 | { | |
607 | conn->decryptBufferUsed = 0; | |
608 | } | |
609 | ||
610 | return (0); | |
611 | } | |
612 | ||
613 | ||
614 | /* | |
615 | * '_httpTLSStart()' - Set up SSL/TLS support on a connection. | |
616 | */ | |
617 | ||
618 | int /* O - 0 on success, -1 on failure */ | |
619 | _httpTLSStart(http_t *http) /* I - HTTP connection */ | |
620 | { | |
621 | char hostname[256], /* Hostname */ | |
622 | *hostptr; /* Pointer into hostname */ | |
623 | ||
624 | ||
625 | DEBUG_printf(("7_httpTLSStart(http=%p)", http)); | |
626 | ||
627 | if ((http->tls = http_sspi_alloc()) == NULL) | |
628 | return (-1); | |
629 | ||
630 | if (http->mode == _HTTP_MODE_CLIENT) | |
631 | { | |
632 | /* | |
633 | * Client: determine hostname... | |
634 | */ | |
635 | ||
636 | if (httpAddrLocalhost(http->hostaddr)) | |
637 | { | |
638 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
639 | } | |
640 | else | |
641 | { | |
642 | /* | |
643 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
644 | */ | |
645 | ||
646 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
647 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
648 | *hostptr == '.') | |
649 | *hostptr = '\0'; | |
650 | } | |
651 | ||
652 | return (http_sspi_client(http, hostname)); | |
653 | } | |
654 | else | |
655 | { | |
656 | /* | |
657 | * Server: determine hostname to use... | |
658 | */ | |
659 | ||
660 | if (http->fields[HTTP_FIELD_HOST][0]) | |
661 | { | |
662 | /* | |
663 | * Use hostname for TLS upgrade... | |
664 | */ | |
665 | ||
666 | strlcpy(hostname, http->fields[HTTP_FIELD_HOST], sizeof(hostname)); | |
667 | } | |
668 | else | |
669 | { | |
670 | /* | |
671 | * Resolve hostname from connection address... | |
672 | */ | |
673 | ||
674 | http_addr_t addr; /* Connection address */ | |
675 | socklen_t addrlen; /* Length of address */ | |
676 | ||
677 | addrlen = sizeof(addr); | |
678 | if (getsockname(http->fd, (struct sockaddr *)&addr, &addrlen)) | |
679 | { | |
680 | DEBUG_printf(("4_httpTLSStart: Unable to get socket address: %s", strerror(errno))); | |
681 | hostname[0] = '\0'; | |
682 | } | |
683 | else if (httpAddrLocalhost(&addr)) | |
684 | hostname[0] = '\0'; | |
685 | else | |
686 | { | |
687 | httpAddrLookup(&addr, hostname, sizeof(hostname)); | |
688 | DEBUG_printf(("4_httpTLSStart: Resolved socket address to \"%s\".", hostname)); | |
689 | } | |
690 | } | |
691 | ||
692 | return (http_sspi_server(http, hostname)); | |
693 | } | |
694 | } | |
695 | ||
696 | ||
697 | /* | |
698 | * '_httpTLSStop()' - Shut down SSL/TLS on a connection. | |
699 | */ | |
700 | ||
701 | void | |
702 | _httpTLSStop(http_t *http) /* I - HTTP connection */ | |
703 | { | |
704 | _http_sspi_t *conn = http->tls; /* SSPI data */ | |
705 | ||
706 | ||
707 | if (conn->contextInitialized && http->fd >= 0) | |
708 | { | |
709 | SecBufferDesc message; /* Array of SecBuffer struct */ | |
710 | SecBuffer buffers[1] = { 0 }; | |
711 | /* Security package buffer */ | |
712 | DWORD dwType; /* Type */ | |
713 | DWORD status; /* Status */ | |
714 | ||
715 | /* | |
716 | * Notify schannel that we are about to close the connection. | |
717 | */ | |
718 | ||
719 | dwType = SCHANNEL_SHUTDOWN; | |
720 | ||
721 | buffers[0].pvBuffer = &dwType; | |
722 | buffers[0].BufferType = SECBUFFER_TOKEN; | |
723 | buffers[0].cbBuffer = sizeof(dwType); | |
724 | ||
725 | message.cBuffers = 1; | |
726 | message.pBuffers = buffers; | |
727 | message.ulVersion = SECBUFFER_VERSION; | |
728 | ||
729 | status = ApplyControlToken(&conn->context, &message); | |
730 | ||
731 | if (SUCCEEDED(status)) | |
732 | { | |
733 | PBYTE pbMessage; /* Message buffer */ | |
734 | DWORD cbMessage; /* Message buffer count */ | |
735 | DWORD cbData; /* Data count */ | |
736 | DWORD dwSSPIFlags; /* SSL attributes we requested */ | |
737 | DWORD dwSSPIOutFlags; /* SSL attributes we received */ | |
738 | TimeStamp tsExpiry; /* Time stamp */ | |
739 | ||
740 | dwSSPIFlags = ASC_REQ_SEQUENCE_DETECT | | |
741 | ASC_REQ_REPLAY_DETECT | | |
742 | ASC_REQ_CONFIDENTIALITY | | |
743 | ASC_REQ_EXTENDED_ERROR | | |
744 | ASC_REQ_ALLOCATE_MEMORY | | |
745 | ASC_REQ_STREAM; | |
746 | ||
747 | buffers[0].pvBuffer = NULL; | |
748 | buffers[0].BufferType = SECBUFFER_TOKEN; | |
749 | buffers[0].cbBuffer = 0; | |
750 | ||
751 | message.cBuffers = 1; | |
752 | message.pBuffers = buffers; | |
753 | message.ulVersion = SECBUFFER_VERSION; | |
754 | ||
755 | status = AcceptSecurityContext(&conn->creds, &conn->context, NULL, | |
756 | dwSSPIFlags, SECURITY_NATIVE_DREP, NULL, | |
757 | &message, &dwSSPIOutFlags, &tsExpiry); | |
758 | ||
759 | if (SUCCEEDED(status)) | |
760 | { | |
761 | pbMessage = buffers[0].pvBuffer; | |
762 | cbMessage = buffers[0].cbBuffer; | |
763 | ||
764 | /* | |
765 | * Send the close notify message to the client. | |
766 | */ | |
767 | ||
768 | if (pbMessage && cbMessage) | |
769 | { | |
770 | cbData = send(http->fd, pbMessage, cbMessage, 0); | |
771 | if ((cbData == SOCKET_ERROR) || (cbData == 0)) | |
772 | { | |
773 | status = WSAGetLastError(); | |
774 | DEBUG_printf(("_httpTLSStop: sending close notify failed: %d", status)); | |
775 | } | |
776 | else | |
777 | { | |
778 | FreeContextBuffer(pbMessage); | |
779 | } | |
780 | } | |
781 | } | |
782 | else | |
783 | { | |
784 | DEBUG_printf(("_httpTLSStop: AcceptSecurityContext failed: %x", status)); | |
785 | } | |
786 | } | |
787 | else | |
788 | { | |
789 | DEBUG_printf(("_httpTLSStop: ApplyControlToken failed: %x", status)); | |
790 | } | |
791 | } | |
792 | ||
793 | http_sspi_free(conn); | |
794 | ||
795 | http->tls = NULL; | |
796 | } | |
797 | ||
798 | ||
799 | /* | |
800 | * '_httpTLSWrite()' - Write to a SSL/TLS connection. | |
801 | */ | |
802 | ||
803 | int /* O - Bytes written */ | |
804 | _httpTLSWrite(http_t *http, /* I - HTTP connection */ | |
805 | const char *buf, /* I - Buffer holding data */ | |
806 | int len) /* I - Length of buffer */ | |
807 | { | |
808 | _http_sspi_t *conn = http->tls; /* SSPI data */ | |
809 | SecBufferDesc message; /* Array of SecBuffer struct */ | |
810 | SecBuffer buffers[4] = { 0 }; /* Security package buffer */ | |
811 | int bufferLen; /* Buffer length */ | |
812 | int bytesLeft; /* Bytes left to write */ | |
813 | const char *bufptr; /* Pointer into buffer */ | |
814 | int num = 0; /* Return value */ | |
815 | ||
816 | ||
817 | bufferLen = conn->streamSizes.cbMaximumMessage + conn->streamSizes.cbHeader + conn->streamSizes.cbTrailer; | |
818 | ||
819 | if (bufferLen > conn->writeBufferLength) | |
820 | { | |
821 | BYTE *temp; /* New buffer pointer */ | |
822 | ||
823 | if ((temp = (BYTE *)realloc(conn->writeBuffer, bufferLen)) == NULL) | |
824 | { | |
825 | DEBUG_printf(("_httpTLSWrite: Unable to allocate buffer of %d bytes.", bufferLen)); | |
826 | WSASetLastError(E_OUTOFMEMORY); | |
827 | return (-1); | |
828 | } | |
829 | ||
830 | conn->writeBuffer = temp; | |
831 | conn->writeBufferLength = bufferLen; | |
832 | } | |
833 | ||
834 | bytesLeft = len; | |
835 | bufptr = buf; | |
836 | ||
837 | while (bytesLeft) | |
838 | { | |
839 | int chunk = min((int)conn->streamSizes.cbMaximumMessage, bytesLeft); | |
840 | /* Size of data to write */ | |
841 | SECURITY_STATUS scRet; /* SSPI status */ | |
842 | ||
843 | /* | |
844 | * Copy user data into the buffer, starting just past the header... | |
845 | */ | |
846 | ||
847 | memcpy(conn->writeBuffer + conn->streamSizes.cbHeader, bufptr, chunk); | |
848 | ||
849 | /* | |
850 | * Setup the SSPI buffers | |
851 | */ | |
852 | ||
853 | message.ulVersion = SECBUFFER_VERSION; | |
854 | message.cBuffers = 4; | |
855 | message.pBuffers = buffers; | |
856 | ||
857 | buffers[0].pvBuffer = conn->writeBuffer; | |
858 | buffers[0].cbBuffer = conn->streamSizes.cbHeader; | |
859 | buffers[0].BufferType = SECBUFFER_STREAM_HEADER; | |
860 | buffers[1].pvBuffer = conn->writeBuffer + conn->streamSizes.cbHeader; | |
861 | buffers[1].cbBuffer = (unsigned long) chunk; | |
862 | buffers[1].BufferType = SECBUFFER_DATA; | |
863 | buffers[2].pvBuffer = conn->writeBuffer + conn->streamSizes.cbHeader + chunk; | |
864 | buffers[2].cbBuffer = conn->streamSizes.cbTrailer; | |
865 | buffers[2].BufferType = SECBUFFER_STREAM_TRAILER; | |
866 | buffers[3].BufferType = SECBUFFER_EMPTY; | |
867 | ||
868 | /* | |
869 | * Encrypt the data | |
870 | */ | |
871 | ||
872 | scRet = EncryptMessage(&conn->context, 0, &message, 0); | |
873 | ||
874 | if (FAILED(scRet)) | |
875 | { | |
876 | DEBUG_printf(("_httpTLSWrite: EncryptMessage failed: %x", scRet)); | |
877 | WSASetLastError(WSASYSCALLFAILURE); | |
878 | return (-1); | |
879 | } | |
880 | ||
881 | /* | |
882 | * Send the data. Remember the size of the total data to send is the size | |
883 | * of the header, the size of the data the caller passed in and the size | |
884 | * of the trailer... | |
885 | */ | |
886 | ||
887 | num = send(http->fd, conn->writeBuffer, buffers[0].cbBuffer + buffers[1].cbBuffer + buffers[2].cbBuffer, 0); | |
888 | ||
889 | if (num <= 0) | |
890 | { | |
891 | DEBUG_printf(("_httpTLSWrite: send failed: %ld", WSAGetLastError())); | |
892 | return (num); | |
893 | } | |
894 | ||
895 | bytesLeft -= chunk; | |
896 | bufptr += chunk; | |
897 | } | |
898 | ||
899 | return (len); | |
900 | } | |
901 | ||
902 | ||
903 | #if 0 | |
904 | /* | |
905 | * 'http_setup_ssl()' - Set up SSL/TLS support on a connection. | |
906 | */ | |
907 | ||
908 | static int /* O - 0 on success, -1 on failure */ | |
909 | http_setup_ssl(http_t *http) /* I - Connection to server */ | |
910 | { | |
911 | char hostname[256], /* Hostname */ | |
912 | *hostptr; /* Pointer into hostname */ | |
913 | ||
914 | TCHAR username[256]; /* Username returned from GetUserName() */ | |
915 | TCHAR commonName[256];/* Common name for certificate */ | |
916 | DWORD dwSize; /* 32 bit size */ | |
917 | ||
918 | ||
919 | DEBUG_printf(("7http_setup_ssl(http=%p)", http)); | |
920 | ||
921 | /* | |
922 | * Get the hostname to use for SSL... | |
923 | */ | |
924 | ||
925 | if (httpAddrLocalhost(http->hostaddr)) | |
926 | { | |
927 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
928 | } | |
929 | else | |
930 | { | |
931 | /* | |
932 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
933 | */ | |
934 | ||
935 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
936 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
937 | *hostptr == '.') | |
938 | *hostptr = '\0'; | |
939 | } | |
940 | ||
941 | http->tls = http_sspi_alloc(); | |
942 | ||
943 | if (!http->tls) | |
944 | { | |
945 | _cupsSetHTTPError(HTTP_STATUS_ERROR); | |
946 | return (-1); | |
947 | } | |
948 | ||
949 | dwSize = sizeof(username) / sizeof(TCHAR); | |
950 | GetUserName(username, &dwSize); | |
951 | _sntprintf_s(commonName, sizeof(commonName) / sizeof(TCHAR), | |
952 | sizeof(commonName) / sizeof(TCHAR), TEXT("CN=%s"), username); | |
953 | ||
954 | if (!_sspiGetCredentials(http->tls, L"ClientContainer", | |
955 | commonName, FALSE)) | |
956 | { | |
957 | _sspiFree(http->tls); | |
958 | http->tls = NULL; | |
959 | ||
960 | http->error = EIO; | |
961 | http->status = HTTP_STATUS_ERROR; | |
962 | ||
963 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, | |
964 | _("Unable to establish a secure connection to host."), 1); | |
965 | ||
966 | return (-1); | |
967 | } | |
968 | ||
969 | _sspiSetAllowsAnyRoot(http->tls, TRUE); | |
970 | _sspiSetAllowsExpiredCerts(http->tls, TRUE); | |
971 | ||
972 | if (!_sspiConnect(http->tls, hostname)) | |
973 | { | |
974 | _sspiFree(http->tls); | |
975 | http->tls = NULL; | |
976 | ||
977 | http->error = EIO; | |
978 | http->status = HTTP_STATUS_ERROR; | |
979 | ||
980 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, | |
981 | _("Unable to establish a secure connection to host."), 1); | |
982 | ||
983 | return (-1); | |
984 | } | |
985 | ||
986 | return (0); | |
987 | } | |
988 | #endif // 0 | |
989 | ||
990 | ||
991 | /* | |
992 | * 'http_sspi_alloc()' - Allocate SSPI object. | |
993 | */ | |
994 | ||
995 | static _http_sspi_t * /* O - New SSPI/SSL object */ | |
996 | http_sspi_alloc(void) | |
997 | { | |
998 | _http_sspi_t *conn = calloc(sizeof(_http_sspi_t), 1); | |
999 | ||
1000 | return (conn); | |
1001 | } | |
1002 | ||
1003 | ||
1004 | /* | |
1005 | * 'http_sspi_client()' - Negotiate a TLS connection as a client. | |
1006 | */ | |
1007 | ||
1008 | static int /* O - 0 on success, -1 on failure */ | |
1009 | http_sspi_client(http_t *http, /* I - Client connection */ | |
1010 | const char *hostname) /* I - Server hostname */ | |
1011 | { | |
1012 | _http_sspi_t *conn = http->tls; /* SSPI data */ | |
1013 | DWORD dwSSPIFlags; /* SSL connection attributes we want */ | |
1014 | DWORD dwSSPIOutFlags; /* SSL connection attributes we got */ | |
1015 | TimeStamp tsExpiry; /* Time stamp */ | |
1016 | SECURITY_STATUS scRet; /* Status */ | |
1017 | int cbData; /* Data count */ | |
1018 | SecBufferDesc inBuffer; /* Array of SecBuffer structs */ | |
1019 | SecBuffer inBuffers[2]; /* Security package buffer */ | |
1020 | SecBufferDesc outBuffer; /* Array of SecBuffer structs */ | |
1021 | SecBuffer outBuffers[1]; /* Security package buffer */ | |
1022 | int ret = 0; /* Return value */ | |
1023 | ||
1024 | ||
1025 | DEBUG_printf(("http_sspi_client(http=%p, hostname=\"%s\")", http, hostname)); | |
1026 | ||
1027 | dwSSPIFlags = ISC_REQ_SEQUENCE_DETECT | | |
1028 | ISC_REQ_REPLAY_DETECT | | |
1029 | ISC_REQ_CONFIDENTIALITY | | |
1030 | ISC_RET_EXTENDED_ERROR | | |
1031 | ISC_REQ_ALLOCATE_MEMORY | | |
1032 | ISC_REQ_STREAM; | |
1033 | ||
1034 | /* | |
1035 | * Initiate a ClientHello message and generate a token. | |
1036 | */ | |
1037 | ||
1038 | outBuffers[0].pvBuffer = NULL; | |
1039 | outBuffers[0].BufferType = SECBUFFER_TOKEN; | |
1040 | outBuffers[0].cbBuffer = 0; | |
1041 | ||
1042 | outBuffer.cBuffers = 1; | |
1043 | outBuffer.pBuffers = outBuffers; | |
1044 | outBuffer.ulVersion = SECBUFFER_VERSION; | |
1045 | ||
1046 | scRet = InitializeSecurityContext(&conn->creds, NULL, TEXT(""), dwSSPIFlags, 0, SECURITY_NATIVE_DREP, NULL, 0, &conn->context, &outBuffer, &dwSSPIOutFlags, &tsExpiry); | |
1047 | ||
1048 | if (scRet != SEC_I_CONTINUE_NEEDED) | |
1049 | { | |
1050 | DEBUG_printf(("http_sspi_client: InitializeSecurityContext(1) failed: %x", scRet)); | |
1051 | return (-1); | |
1052 | } | |
1053 | ||
1054 | /* | |
1055 | * Send response to server if there is one. | |
1056 | */ | |
1057 | ||
1058 | if (outBuffers[0].cbBuffer && outBuffers[0].pvBuffer) | |
1059 | { | |
1060 | if ((cbData = send(http->fd, outBuffers[0].pvBuffer, outBuffers[0].cbBuffer, 0)) <= 0) | |
1061 | { | |
1062 | DEBUG_printf(("http_sspi_client: send failed: %d", WSAGetLastError())); | |
1063 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1064 | DeleteSecurityContext(&conn->context); | |
1065 | return (-1); | |
1066 | } | |
1067 | ||
1068 | DEBUG_printf(("http_sspi_client: %d bytes of handshake data sent.", cbData)); | |
1069 | ||
1070 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1071 | outBuffers[0].pvBuffer = NULL; | |
1072 | } | |
1073 | ||
1074 | dwSSPIFlags = ISC_REQ_MANUAL_CRED_VALIDATION | | |
1075 | ISC_REQ_SEQUENCE_DETECT | | |
1076 | ISC_REQ_REPLAY_DETECT | | |
1077 | ISC_REQ_CONFIDENTIALITY | | |
1078 | ISC_RET_EXTENDED_ERROR | | |
1079 | ISC_REQ_ALLOCATE_MEMORY | | |
1080 | ISC_REQ_STREAM; | |
1081 | ||
1082 | conn->decryptBufferUsed = 0; | |
1083 | ||
1084 | /* | |
1085 | * Loop until the handshake is finished or an error occurs. | |
1086 | */ | |
1087 | ||
1088 | scRet = SEC_I_CONTINUE_NEEDED; | |
1089 | ||
1090 | while(scRet == SEC_I_CONTINUE_NEEDED || | |
1091 | scRet == SEC_E_INCOMPLETE_MESSAGE || | |
1092 | scRet == SEC_I_INCOMPLETE_CREDENTIALS) | |
1093 | { | |
1094 | if (conn->decryptBufferUsed == 0 || scRet == SEC_E_INCOMPLETE_MESSAGE) | |
1095 | { | |
1096 | if (conn->decryptBufferLength <= conn->decryptBufferUsed) | |
1097 | { | |
1098 | BYTE *temp; /* New buffer */ | |
1099 | ||
1100 | if (conn->decryptBufferLength >= 262144) | |
1101 | { | |
1102 | WSASetLastError(E_OUTOFMEMORY); | |
1103 | DEBUG_puts("http_sspi_client: Decryption buffer too large (>256k)"); | |
1104 | return (-1); | |
1105 | } | |
1106 | ||
1107 | if ((temp = realloc(conn->decryptBuffer, conn->decryptBufferLength + 4096)) == NULL) | |
1108 | { | |
1109 | DEBUG_printf(("http_sspi_client: Unable to allocate %d byte buffer.", conn->decryptBufferLength + 4096)); | |
1110 | WSASetLastError(E_OUTOFMEMORY); | |
1111 | return (-1); | |
1112 | } | |
1113 | ||
1114 | conn->decryptBufferLength += 4096; | |
1115 | conn->decryptBuffer = temp; | |
1116 | } | |
1117 | ||
1118 | cbData = recv(http->fd, conn->decryptBuffer + conn->decryptBufferUsed, (int)(conn->decryptBufferLength - conn->decryptBufferUsed), 0); | |
1119 | ||
1120 | if (cbData < 0) | |
1121 | { | |
1122 | DEBUG_printf(("http_sspi_client: recv failed: %d", WSAGetLastError())); | |
1123 | return (-1); | |
1124 | } | |
1125 | else if (cbData == 0) | |
1126 | { | |
1127 | DEBUG_printf(("http_sspi_client: Server unexpectedly disconnected.")); | |
1128 | return (-1); | |
1129 | } | |
1130 | ||
1131 | DEBUG_printf(("http_sspi_client: %d bytes of handshake data received", cbData)); | |
1132 | ||
1133 | conn->decryptBufferUsed += cbData; | |
1134 | } | |
1135 | ||
1136 | /* | |
1137 | * Set up the input buffers. Buffer 0 is used to pass in data received from | |
1138 | * the server. Schannel will consume some or all of this. Leftover data | |
1139 | * (if any) will be placed in buffer 1 and given a buffer type of | |
1140 | * SECBUFFER_EXTRA. | |
1141 | */ | |
1142 | ||
1143 | inBuffers[0].pvBuffer = conn->decryptBuffer; | |
1144 | inBuffers[0].cbBuffer = (unsigned long)conn->decryptBufferUsed; | |
1145 | inBuffers[0].BufferType = SECBUFFER_TOKEN; | |
1146 | ||
1147 | inBuffers[1].pvBuffer = NULL; | |
1148 | inBuffers[1].cbBuffer = 0; | |
1149 | inBuffers[1].BufferType = SECBUFFER_EMPTY; | |
1150 | ||
1151 | inBuffer.cBuffers = 2; | |
1152 | inBuffer.pBuffers = inBuffers; | |
1153 | inBuffer.ulVersion = SECBUFFER_VERSION; | |
1154 | ||
1155 | /* | |
1156 | * Set up the output buffers. These are initialized to NULL so as to make it | |
1157 | * less likely we'll attempt to free random garbage later. | |
1158 | */ | |
1159 | ||
1160 | outBuffers[0].pvBuffer = NULL; | |
1161 | outBuffers[0].BufferType = SECBUFFER_TOKEN; | |
1162 | outBuffers[0].cbBuffer = 0; | |
1163 | ||
1164 | outBuffer.cBuffers = 1; | |
1165 | outBuffer.pBuffers = outBuffers; | |
1166 | outBuffer.ulVersion = SECBUFFER_VERSION; | |
1167 | ||
1168 | /* | |
1169 | * Call InitializeSecurityContext. | |
1170 | */ | |
1171 | ||
1172 | scRet = InitializeSecurityContext(&conn->creds, &conn->context, NULL, dwSSPIFlags, 0, SECURITY_NATIVE_DREP, &inBuffer, 0, NULL, &outBuffer, &dwSSPIOutFlags, &tsExpiry); | |
1173 | ||
1174 | /* | |
1175 | * If InitializeSecurityContext was successful (or if the error was one of | |
1176 | * the special extended ones), send the contents of the output buffer to the | |
1177 | * server. | |
1178 | */ | |
1179 | ||
1180 | if (scRet == SEC_E_OK || | |
1181 | scRet == SEC_I_CONTINUE_NEEDED || | |
1182 | FAILED(scRet) && (dwSSPIOutFlags & ISC_RET_EXTENDED_ERROR)) | |
1183 | { | |
1184 | if (outBuffers[0].cbBuffer && outBuffers[0].pvBuffer) | |
1185 | { | |
1186 | cbData = send(http->fd, outBuffers[0].pvBuffer, outBuffers[0].cbBuffer, 0); | |
1187 | ||
1188 | if (cbData <= 0) | |
1189 | { | |
1190 | DEBUG_printf(("http_sspi_client: send failed: %d", WSAGetLastError())); | |
1191 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1192 | DeleteSecurityContext(&conn->context); | |
1193 | return (-1); | |
1194 | } | |
1195 | ||
1196 | DEBUG_printf(("http_sspi_client: %d bytes of handshake data sent.", cbData)); | |
1197 | ||
1198 | /* | |
1199 | * Free output buffer. | |
1200 | */ | |
1201 | ||
1202 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1203 | outBuffers[0].pvBuffer = NULL; | |
1204 | } | |
1205 | } | |
1206 | ||
1207 | /* | |
1208 | * If InitializeSecurityContext returned SEC_E_INCOMPLETE_MESSAGE, then we | |
1209 | * need to read more data from the server and try again. | |
1210 | */ | |
1211 | ||
1212 | if (scRet == SEC_E_INCOMPLETE_MESSAGE) | |
1213 | continue; | |
1214 | ||
1215 | /* | |
1216 | * If InitializeSecurityContext returned SEC_E_OK, then the handshake | |
1217 | * completed successfully. | |
1218 | */ | |
1219 | ||
1220 | if (scRet == SEC_E_OK) | |
1221 | { | |
1222 | /* | |
1223 | * If the "extra" buffer contains data, this is encrypted application | |
1224 | * protocol layer stuff. It needs to be saved. The application layer will | |
1225 | * later decrypt it with DecryptMessage. | |
1226 | */ | |
1227 | ||
1228 | DEBUG_puts("http_sspi_client: Handshake was successful."); | |
1229 | ||
1230 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
1231 | { | |
1232 | memmove(conn->decryptBuffer, conn->decryptBuffer + conn->decryptBufferUsed - inBuffers[1].cbBuffer, inBuffers[1].cbBuffer); | |
1233 | ||
1234 | conn->decryptBufferUsed = inBuffers[1].cbBuffer; | |
1235 | ||
1236 | DEBUG_printf(("http_sspi_client: %d bytes of app data was bundled with handshake data", conn->decryptBufferUsed)); | |
1237 | } | |
1238 | else | |
1239 | conn->decryptBufferUsed = 0; | |
1240 | ||
1241 | /* | |
1242 | * Bail out to quit | |
1243 | */ | |
1244 | ||
1245 | break; | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * Check for fatal error. | |
1250 | */ | |
1251 | ||
1252 | if (FAILED(scRet)) | |
1253 | { | |
1254 | DEBUG_printf(("http_sspi_client: InitializeSecurityContext(2) failed: %x", scRet)); | |
1255 | ret = -1; | |
1256 | break; | |
1257 | } | |
1258 | ||
1259 | /* | |
1260 | * If InitializeSecurityContext returned SEC_I_INCOMPLETE_CREDENTIALS, | |
1261 | * then the server just requested client authentication. | |
1262 | */ | |
1263 | ||
1264 | if (scRet == SEC_I_INCOMPLETE_CREDENTIALS) | |
1265 | { | |
1266 | /* | |
1267 | * Unimplemented | |
1268 | */ | |
1269 | ||
1270 | DEBUG_printf(("http_sspi_client: server requested client credentials.")); | |
1271 | ret = -1; | |
1272 | break; | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * Copy any leftover data from the "extra" buffer, and go around again. | |
1277 | */ | |
1278 | ||
1279 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
1280 | { | |
1281 | memmove(conn->decryptBuffer, conn->decryptBuffer + conn->decryptBufferUsed - inBuffers[1].cbBuffer, inBuffers[1].cbBuffer); | |
1282 | ||
1283 | conn->decryptBufferUsed = inBuffers[1].cbBuffer; | |
1284 | } | |
1285 | else | |
1286 | { | |
1287 | conn->decryptBufferUsed = 0; | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | if (!ret) | |
1292 | { | |
1293 | /* | |
1294 | * Success! Get the server cert | |
1295 | */ | |
1296 | ||
1297 | conn->contextInitialized = TRUE; | |
1298 | ||
1299 | scRet = QueryContextAttributes(&conn->context, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (VOID *)&(conn->remoteCert)); | |
1300 | ||
1301 | if (scRet != SEC_E_OK) | |
1302 | { | |
1303 | DEBUG_printf(("http_sspi_client: QueryContextAttributes failed(SECPKG_ATTR_REMOTE_CERT_CONTEXT): %x", scRet)); | |
1304 | return (-1); | |
1305 | } | |
1306 | ||
1307 | #if 0 | |
1308 | /* TODO: Move this out for opt-in server cert validation, like other platforms. */ | |
1309 | scRet = http_sspi_verify(conn->remoteCert, hostname, conn->certFlags); | |
1310 | ||
1311 | if (scRet != SEC_E_OK) | |
1312 | { | |
1313 | DEBUG_printf(("http_sspi_client: sspi_verify_certificate failed: %x", scRet)); | |
1314 | ret = -1; | |
1315 | goto cleanup; | |
1316 | } | |
1317 | #endif // 0 | |
1318 | ||
1319 | /* | |
1320 | * Find out how big the header/trailer will be: | |
1321 | */ | |
1322 | ||
1323 | scRet = QueryContextAttributes(&conn->context, SECPKG_ATTR_STREAM_SIZES, &conn->streamSizes); | |
1324 | ||
1325 | if (scRet != SEC_E_OK) | |
1326 | { | |
1327 | DEBUG_printf(("http_sspi_client: QueryContextAttributes failed(SECPKG_ATTR_STREAM_SIZES): %x", scRet)); | |
1328 | ret = -1; | |
1329 | } | |
1330 | } | |
1331 | ||
1332 | return (ret); | |
1333 | } | |
1334 | ||
1335 | ||
1336 | /* | |
1337 | * 'http_sspi_free()' - Close a connection and free resources. | |
1338 | */ | |
1339 | ||
1340 | static void | |
1341 | http_sspi_free(_http_sspi_t *conn) /* I - Client connection */ | |
1342 | { | |
1343 | if (!conn) | |
1344 | return; | |
1345 | ||
1346 | if (conn->contextInitialized) | |
1347 | DeleteSecurityContext(&conn->context); | |
1348 | ||
1349 | if (conn->decryptBuffer) | |
1350 | free(conn->decryptBuffer); | |
1351 | ||
1352 | if (conn->readBuffer) | |
1353 | free(conn->readBuffer); | |
1354 | ||
1355 | if (conn->writeBuffer) | |
1356 | free(conn->writeBuffer); | |
1357 | ||
1358 | if (conn->localCert) | |
1359 | CertFreeCertificateContext(conn->localCert); | |
1360 | ||
1361 | if (conn->remoteCert) | |
1362 | CertFreeCertificateContext(conn->remoteCert); | |
1363 | ||
1364 | free(conn); | |
1365 | } | |
1366 | ||
1367 | ||
1368 | #if 0 | |
1369 | /* | |
1370 | * '_sspiGetCredentials()' - Retrieve an SSL/TLS certificate from the system store | |
1371 | * If one cannot be found, one is created. | |
1372 | */ | |
1373 | BOOL /* O - 1 on success, 0 on failure */ | |
1374 | _sspiGetCredentials(_http_sspi_t *conn, | |
1375 | /* I - Client connection */ | |
1376 | const LPWSTR container, | |
1377 | /* I - Cert container name */ | |
1378 | const TCHAR *cn, /* I - Common name of certificate */ | |
1379 | BOOL isServer) | |
1380 | /* I - Is caller a server? */ | |
1381 | { | |
1382 | HCERTSTORE store = NULL; /* Certificate store */ | |
1383 | PCCERT_CONTEXT storedContext = NULL; | |
1384 | /* Context created from the store */ | |
1385 | PCCERT_CONTEXT createdContext = NULL; | |
1386 | /* Context created by us */ | |
1387 | DWORD dwSize = 0; /* 32 bit size */ | |
1388 | PBYTE p = NULL; /* Temporary storage */ | |
1389 | HCRYPTPROV hProv = (HCRYPTPROV) NULL; | |
1390 | /* Handle to a CSP */ | |
1391 | CERT_NAME_BLOB sib; /* Arbitrary array of bytes */ | |
1392 | SCHANNEL_CRED SchannelCred; /* Schannel credential data */ | |
1393 | TimeStamp tsExpiry; /* Time stamp */ | |
1394 | SECURITY_STATUS Status; /* Status */ | |
1395 | HCRYPTKEY hKey = (HCRYPTKEY) NULL; | |
1396 | /* Handle to crypto key */ | |
1397 | CRYPT_KEY_PROV_INFO kpi; /* Key container info */ | |
1398 | SYSTEMTIME et; /* System time */ | |
1399 | CERT_EXTENSIONS exts; /* Array of cert extensions */ | |
1400 | CRYPT_KEY_PROV_INFO ckp; /* Handle to crypto key */ | |
1401 | BOOL ok = TRUE; /* Return value */ | |
1402 | ||
1403 | if (!conn) | |
1404 | return (FALSE); | |
1405 | if (!cn) | |
1406 | return (FALSE); | |
1407 | ||
1408 | if (!CryptAcquireContextW(&hProv, (LPWSTR) container, MS_DEF_PROV_W, | |
1409 | PROV_RSA_FULL, | |
1410 | CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET)) | |
1411 | { | |
1412 | if (GetLastError() == NTE_EXISTS) | |
1413 | { | |
1414 | if (!CryptAcquireContextW(&hProv, (LPWSTR) container, MS_DEF_PROV_W, | |
1415 | PROV_RSA_FULL, CRYPT_MACHINE_KEYSET)) | |
1416 | { | |
1417 | DEBUG_printf(("_sspiGetCredentials: CryptAcquireContext failed: %x\n", | |
1418 | GetLastError())); | |
1419 | ok = FALSE; | |
1420 | goto cleanup; | |
1421 | } | |
1422 | } | |
1423 | } | |
1424 | ||
1425 | store = CertOpenStore(CERT_STORE_PROV_SYSTEM, | |
1426 | X509_ASN_ENCODING|PKCS_7_ASN_ENCODING, | |
1427 | hProv, | |
1428 | CERT_SYSTEM_STORE_LOCAL_MACHINE | | |
1429 | CERT_STORE_NO_CRYPT_RELEASE_FLAG | | |
1430 | CERT_STORE_OPEN_EXISTING_FLAG, | |
1431 | L"MY"); | |
1432 | ||
1433 | if (!store) | |
1434 | { | |
1435 | DEBUG_printf(("_sspiGetCredentials: CertOpenSystemStore failed: %x\n", | |
1436 | GetLastError())); | |
1437 | ok = FALSE; | |
1438 | goto cleanup; | |
1439 | } | |
1440 | ||
1441 | dwSize = 0; | |
1442 | ||
1443 | if (!CertStrToName(X509_ASN_ENCODING, cn, CERT_OID_NAME_STR, | |
1444 | NULL, NULL, &dwSize, NULL)) | |
1445 | { | |
1446 | DEBUG_printf(("_sspiGetCredentials: CertStrToName failed: %x\n", | |
1447 | GetLastError())); | |
1448 | ok = FALSE; | |
1449 | goto cleanup; | |
1450 | } | |
1451 | ||
1452 | p = (PBYTE) malloc(dwSize); | |
1453 | ||
1454 | if (!p) | |
1455 | { | |
1456 | DEBUG_printf(("_sspiGetCredentials: malloc failed for %d bytes", dwSize)); | |
1457 | ok = FALSE; | |
1458 | goto cleanup; | |
1459 | } | |
1460 | ||
1461 | if (!CertStrToName(X509_ASN_ENCODING, cn, CERT_OID_NAME_STR, NULL, | |
1462 | p, &dwSize, NULL)) | |
1463 | { | |
1464 | DEBUG_printf(("_sspiGetCredentials: CertStrToName failed: %x", | |
1465 | GetLastError())); | |
1466 | ok = FALSE; | |
1467 | goto cleanup; | |
1468 | } | |
1469 | ||
1470 | sib.cbData = dwSize; | |
1471 | sib.pbData = p; | |
1472 | ||
1473 | storedContext = CertFindCertificateInStore(store, X509_ASN_ENCODING|PKCS_7_ASN_ENCODING, | |
1474 | 0, CERT_FIND_SUBJECT_NAME, &sib, NULL); | |
1475 | ||
1476 | if (!storedContext) | |
1477 | { | |
1478 | /* | |
1479 | * If we couldn't find the context, then we'll | |
1480 | * create a new one | |
1481 | */ | |
1482 | if (!CryptGenKey(hProv, AT_KEYEXCHANGE, CRYPT_EXPORTABLE, &hKey)) | |
1483 | { | |
1484 | DEBUG_printf(("_sspiGetCredentials: CryptGenKey failed: %x", | |
1485 | GetLastError())); | |
1486 | ok = FALSE; | |
1487 | goto cleanup; | |
1488 | } | |
1489 | ||
1490 | ZeroMemory(&kpi, sizeof(kpi)); | |
1491 | kpi.pwszContainerName = (LPWSTR) container; | |
1492 | kpi.pwszProvName = MS_DEF_PROV_W; | |
1493 | kpi.dwProvType = PROV_RSA_FULL; | |
1494 | kpi.dwFlags = CERT_SET_KEY_CONTEXT_PROP_ID; | |
1495 | kpi.dwKeySpec = AT_KEYEXCHANGE; | |
1496 | ||
1497 | GetSystemTime(&et); | |
1498 | et.wYear += 10; | |
1499 | ||
1500 | ZeroMemory(&exts, sizeof(exts)); | |
1501 | ||
1502 | createdContext = CertCreateSelfSignCertificate(hProv, &sib, 0, &kpi, NULL, NULL, | |
1503 | &et, &exts); | |
1504 | ||
1505 | if (!createdContext) | |
1506 | { | |
1507 | DEBUG_printf(("_sspiGetCredentials: CertCreateSelfSignCertificate failed: %x", | |
1508 | GetLastError())); | |
1509 | ok = FALSE; | |
1510 | goto cleanup; | |
1511 | } | |
1512 | ||
1513 | if (!CertAddCertificateContextToStore(store, createdContext, | |
1514 | CERT_STORE_ADD_REPLACE_EXISTING, | |
1515 | &storedContext)) | |
1516 | { | |
1517 | DEBUG_printf(("_sspiGetCredentials: CertAddCertificateContextToStore failed: %x", | |
1518 | GetLastError())); | |
1519 | ok = FALSE; | |
1520 | goto cleanup; | |
1521 | } | |
1522 | ||
1523 | ZeroMemory(&ckp, sizeof(ckp)); | |
1524 | ckp.pwszContainerName = (LPWSTR) container; | |
1525 | ckp.pwszProvName = MS_DEF_PROV_W; | |
1526 | ckp.dwProvType = PROV_RSA_FULL; | |
1527 | ckp.dwFlags = CRYPT_MACHINE_KEYSET; | |
1528 | ckp.dwKeySpec = AT_KEYEXCHANGE; | |
1529 | ||
1530 | if (!CertSetCertificateContextProperty(storedContext, | |
1531 | CERT_KEY_PROV_INFO_PROP_ID, | |
1532 | 0, &ckp)) | |
1533 | { | |
1534 | DEBUG_printf(("_sspiGetCredentials: CertSetCertificateContextProperty failed: %x", | |
1535 | GetLastError())); | |
1536 | ok = FALSE; | |
1537 | goto cleanup; | |
1538 | } | |
1539 | } | |
1540 | ||
1541 | ZeroMemory(&SchannelCred, sizeof(SchannelCred)); | |
1542 | ||
1543 | SchannelCred.dwVersion = SCHANNEL_CRED_VERSION; | |
1544 | SchannelCred.cCreds = 1; | |
1545 | SchannelCred.paCred = &storedContext; | |
1546 | ||
1547 | /* | |
1548 | * SSPI doesn't seem to like it if grbitEnabledProtocols | |
1549 | * is set for a client | |
1550 | */ | |
1551 | if (isServer) | |
1552 | SchannelCred.grbitEnabledProtocols = SP_PROT_SSL3TLS1; | |
1553 | ||
1554 | /* | |
1555 | * Create an SSPI credential. | |
1556 | */ | |
1557 | Status = AcquireCredentialsHandle(NULL, UNISP_NAME, | |
1558 | isServer ? SECPKG_CRED_INBOUND:SECPKG_CRED_OUTBOUND, | |
1559 | NULL, &SchannelCred, NULL, NULL, &conn->creds, | |
1560 | &tsExpiry); | |
1561 | if (Status != SEC_E_OK) | |
1562 | { | |
1563 | DEBUG_printf(("_sspiGetCredentials: AcquireCredentialsHandle failed: %x", Status)); | |
1564 | ok = FALSE; | |
1565 | goto cleanup; | |
1566 | } | |
1567 | ||
1568 | cleanup: | |
1569 | ||
1570 | /* | |
1571 | * Cleanup | |
1572 | */ | |
1573 | if (hKey) | |
1574 | CryptDestroyKey(hKey); | |
1575 | ||
1576 | if (createdContext) | |
1577 | CertFreeCertificateContext(createdContext); | |
1578 | ||
1579 | if (storedContext) | |
1580 | CertFreeCertificateContext(storedContext); | |
1581 | ||
1582 | if (p) | |
1583 | free(p); | |
1584 | ||
1585 | if (store) | |
1586 | CertCloseStore(store, 0); | |
1587 | ||
1588 | if (hProv) | |
1589 | CryptReleaseContext(hProv, 0); | |
1590 | ||
1591 | return (ok); | |
1592 | } | |
1593 | #endif // 0 | |
1594 | ||
1595 | ||
1596 | /* | |
1597 | * 'http_sspi_server()' - Negotiate a TLS connection as a server. | |
1598 | */ | |
1599 | ||
1600 | static int /* O - 0 on success, -1 on failure */ | |
1601 | http_sspi_server(http_t *http, /* I - HTTP connection */ | |
1602 | const char *hostname) /* I - Hostname of server */ | |
1603 | { | |
1604 | _http_sspi_t *conn = http->tls; /* I - SSPI data */ | |
1605 | DWORD dwSSPIFlags; /* SSL connection attributes we want */ | |
1606 | DWORD dwSSPIOutFlags; /* SSL connection attributes we got */ | |
1607 | TimeStamp tsExpiry; /* Time stamp */ | |
1608 | SECURITY_STATUS scRet; /* SSPI Status */ | |
1609 | SecBufferDesc inBuffer; /* Array of SecBuffer structs */ | |
1610 | SecBuffer inBuffers[2]; /* Security package buffer */ | |
1611 | SecBufferDesc outBuffer; /* Array of SecBuffer structs */ | |
1612 | SecBuffer outBuffers[1]; /* Security package buffer */ | |
1613 | int num = 0; /* 32 bit status value */ | |
1614 | BOOL fInitContext = TRUE; /* Has the context been init'd? */ | |
1615 | int ret = 0; /* Return value */ | |
1616 | ||
1617 | ||
1618 | DEBUG_printf(("http_sspi_server(http=%p, hostname=\"%s\")", http, hostname)); | |
1619 | ||
1620 | dwSSPIFlags = ASC_REQ_SEQUENCE_DETECT | | |
1621 | ASC_REQ_REPLAY_DETECT | | |
1622 | ASC_REQ_CONFIDENTIALITY | | |
1623 | ASC_REQ_EXTENDED_ERROR | | |
1624 | ASC_REQ_ALLOCATE_MEMORY | | |
1625 | ASC_REQ_STREAM; | |
1626 | ||
1627 | conn->decryptBufferUsed = 0; | |
1628 | ||
1629 | /* | |
1630 | * Set OutBuffer for AcceptSecurityContext call | |
1631 | */ | |
1632 | ||
1633 | outBuffer.cBuffers = 1; | |
1634 | outBuffer.pBuffers = outBuffers; | |
1635 | outBuffer.ulVersion = SECBUFFER_VERSION; | |
1636 | ||
1637 | scRet = SEC_I_CONTINUE_NEEDED; | |
1638 | ||
1639 | while (scRet == SEC_I_CONTINUE_NEEDED || | |
1640 | scRet == SEC_E_INCOMPLETE_MESSAGE || | |
1641 | scRet == SEC_I_INCOMPLETE_CREDENTIALS) | |
1642 | { | |
1643 | if (conn->decryptBufferUsed == 0 || scRet == SEC_E_INCOMPLETE_MESSAGE) | |
1644 | { | |
1645 | if (conn->decryptBufferLength <= conn->decryptBufferUsed) | |
1646 | { | |
1647 | BYTE *temp; /* New buffer */ | |
1648 | ||
1649 | if (conn->decryptBufferLength >= 262144) | |
1650 | { | |
1651 | WSASetLastError(E_OUTOFMEMORY); | |
1652 | DEBUG_puts("http_sspi_server: Decryption buffer too large (>256k)"); | |
1653 | return (-1); | |
1654 | } | |
1655 | ||
1656 | if ((temp = realloc(conn->decryptBuffer, conn->decryptBufferLength + 4096)) == NULL) | |
1657 | { | |
1658 | DEBUG_printf(("http_sspi_server: Unable to allocate %d byte buffer.", conn->decryptBufferLength + 4096)); | |
1659 | WSASetLastError(E_OUTOFMEMORY); | |
1660 | return (-1); | |
1661 | } | |
1662 | ||
1663 | conn->decryptBufferLength += 4096; | |
1664 | conn->decryptBuffer = temp; | |
1665 | } | |
1666 | ||
1667 | for (;;) | |
1668 | { | |
1669 | num = recv(http->fd, conn->decryptBuffer + conn->decryptBufferUsed, (int)(conn->decryptBufferLength - conn->decryptBufferUsed), 0); | |
1670 | ||
1671 | if (num == -1 && WSAGetLastError() == WSAEWOULDBLOCK) | |
1672 | Sleep(1); | |
1673 | else | |
1674 | break; | |
1675 | } | |
1676 | ||
1677 | if (num < 0) | |
1678 | { | |
1679 | DEBUG_printf(("http_sspi_server: recv failed: %d", WSAGetLastError())); | |
1680 | return (-1); | |
1681 | } | |
1682 | else if (num == 0) | |
1683 | { | |
1684 | DEBUG_puts("http_sspi_server: client disconnected"); | |
1685 | return (-1); | |
1686 | } | |
1687 | ||
1688 | DEBUG_printf(("http_sspi_server: received %d (handshake) bytes from client.", num)); | |
1689 | conn->decryptBufferUsed += num; | |
1690 | } | |
1691 | ||
1692 | /* | |
1693 | * InBuffers[1] is for getting extra data that SSPI/SCHANNEL doesn't process | |
1694 | * on this run around the loop. | |
1695 | */ | |
1696 | ||
1697 | inBuffers[0].pvBuffer = conn->decryptBuffer; | |
1698 | inBuffers[0].cbBuffer = (unsigned long)conn->decryptBufferUsed; | |
1699 | inBuffers[0].BufferType = SECBUFFER_TOKEN; | |
1700 | ||
1701 | inBuffers[1].pvBuffer = NULL; | |
1702 | inBuffers[1].cbBuffer = 0; | |
1703 | inBuffers[1].BufferType = SECBUFFER_EMPTY; | |
1704 | ||
1705 | inBuffer.cBuffers = 2; | |
1706 | inBuffer.pBuffers = inBuffers; | |
1707 | inBuffer.ulVersion = SECBUFFER_VERSION; | |
1708 | ||
1709 | /* | |
1710 | * Initialize these so if we fail, pvBuffer contains NULL, so we don't try to | |
1711 | * free random garbage at the quit. | |
1712 | */ | |
1713 | ||
1714 | outBuffers[0].pvBuffer = NULL; | |
1715 | outBuffers[0].BufferType = SECBUFFER_TOKEN; | |
1716 | outBuffers[0].cbBuffer = 0; | |
1717 | ||
1718 | scRet = AcceptSecurityContext(&conn->creds, (fInitContext?NULL:&conn->context), &inBuffer, dwSSPIFlags, SECURITY_NATIVE_DREP, (fInitContext?&conn->context:NULL), &outBuffer, &dwSSPIOutFlags, &tsExpiry); | |
1719 | ||
1720 | fInitContext = FALSE; | |
1721 | ||
1722 | if (scRet == SEC_E_OK || | |
1723 | scRet == SEC_I_CONTINUE_NEEDED || | |
1724 | (FAILED(scRet) && ((dwSSPIOutFlags & ISC_RET_EXTENDED_ERROR) != 0))) | |
1725 | { | |
1726 | if (outBuffers[0].cbBuffer && outBuffers[0].pvBuffer) | |
1727 | { | |
1728 | /* | |
1729 | * Send response to server if there is one. | |
1730 | */ | |
1731 | ||
1732 | num = send(http->fd, outBuffers[0].pvBuffer, outBuffers[0].cbBuffer, 0); | |
1733 | ||
1734 | if (num <= 0) | |
1735 | { | |
1736 | DEBUG_printf(("http_sspi_server: handshake send failed: %d", WSAGetLastError())); | |
1737 | return (-1); | |
1738 | } | |
1739 | ||
1740 | DEBUG_printf(("http_sspi_server: sent %d handshake bytes to client.", outBuffers[0].cbBuffer)); | |
1741 | ||
1742 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1743 | outBuffers[0].pvBuffer = NULL; | |
1744 | } | |
1745 | } | |
1746 | ||
1747 | if (scRet == SEC_E_OK) | |
1748 | { | |
1749 | /* | |
1750 | * If there's extra data then save it for next time we go to decrypt. | |
1751 | */ | |
1752 | ||
1753 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
1754 | { | |
1755 | memcpy(conn->decryptBuffer, (LPBYTE)(conn->decryptBuffer + conn->decryptBufferUsed - inBuffers[1].cbBuffer), inBuffers[1].cbBuffer); | |
1756 | conn->decryptBufferUsed = inBuffers[1].cbBuffer; | |
1757 | } | |
1758 | else | |
1759 | { | |
1760 | conn->decryptBufferUsed = 0; | |
1761 | } | |
1762 | break; | |
1763 | } | |
1764 | else if (FAILED(scRet) && scRet != SEC_E_INCOMPLETE_MESSAGE) | |
1765 | { | |
1766 | DEBUG_printf(("http_sspi_server: AcceptSecurityContext failed: %x", scRet)); | |
1767 | ret = -1; | |
1768 | break; | |
1769 | } | |
1770 | ||
1771 | if (scRet != SEC_E_INCOMPLETE_MESSAGE && | |
1772 | scRet != SEC_I_INCOMPLETE_CREDENTIALS) | |
1773 | { | |
1774 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
1775 | { | |
1776 | memcpy(conn->decryptBuffer, (LPBYTE)(conn->decryptBuffer + conn->decryptBufferUsed - inBuffers[1].cbBuffer), inBuffers[1].cbBuffer); | |
1777 | conn->decryptBufferUsed = inBuffers[1].cbBuffer; | |
1778 | } | |
1779 | else | |
1780 | { | |
1781 | conn->decryptBufferUsed = 0; | |
1782 | } | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | if (!ret) | |
1787 | { | |
1788 | conn->contextInitialized = TRUE; | |
1789 | ||
1790 | /* | |
1791 | * Find out how big the header will be: | |
1792 | */ | |
1793 | ||
1794 | scRet = QueryContextAttributes(&conn->context, SECPKG_ATTR_STREAM_SIZES, &conn->streamSizes); | |
1795 | ||
1796 | if (scRet != SEC_E_OK) | |
1797 | { | |
1798 | DEBUG_printf(("http_sspi_server: QueryContextAttributes failed: %x", scRet)); | |
1799 | ret = -1; | |
1800 | } | |
1801 | } | |
1802 | ||
1803 | return (ret); | |
1804 | } | |
1805 | ||
1806 | ||
1807 | #if 0 | |
1808 | /* | |
1809 | * '_sspiSetAllowsAnyRoot()' - Set the client cert policy for untrusted root certs | |
1810 | */ | |
1811 | void | |
1812 | _sspiSetAllowsAnyRoot(_http_sspi_t *conn, | |
1813 | /* I - Client connection */ | |
1814 | BOOL allow) | |
1815 | /* I - Allow any root */ | |
1816 | { | |
1817 | conn->certFlags = (allow) ? conn->certFlags | SECURITY_FLAG_IGNORE_UNKNOWN_CA : | |
1818 | conn->certFlags & ~SECURITY_FLAG_IGNORE_UNKNOWN_CA; | |
1819 | } | |
1820 | ||
1821 | ||
1822 | /* | |
1823 | * '_sspiSetAllowsExpiredCerts()' - Set the client cert policy for expired root certs | |
1824 | */ | |
1825 | void | |
1826 | _sspiSetAllowsExpiredCerts(_http_sspi_t *conn, | |
1827 | /* I - Client connection */ | |
1828 | BOOL allow) | |
1829 | /* I - Allow expired certs */ | |
1830 | { | |
1831 | conn->certFlags = (allow) ? conn->certFlags | SECURITY_FLAG_IGNORE_CERT_DATE_INVALID : | |
1832 | conn->certFlags & ~SECURITY_FLAG_IGNORE_CERT_DATE_INVALID; | |
1833 | } | |
1834 | ||
1835 | ||
1836 | /* | |
1837 | * 'http_sspi_verify()' - Verify a certificate. | |
1838 | */ | |
1839 | ||
1840 | static DWORD /* O - Error code (0 == No error) */ | |
1841 | http_sspi_verify( | |
1842 | PCCERT_CONTEXT cert, /* I - Server certificate */ | |
1843 | const char *common_name, /* I - Common name */ | |
1844 | DWORD dwCertFlags) /* I - Verification flags */ | |
1845 | { | |
1846 | HTTPSPolicyCallbackData httpsPolicy; /* HTTPS Policy Struct */ | |
1847 | CERT_CHAIN_POLICY_PARA policyPara; /* Cert chain policy parameters */ | |
1848 | CERT_CHAIN_POLICY_STATUS policyStatus;/* Cert chain policy status */ | |
1849 | CERT_CHAIN_PARA chainPara; /* Used for searching and matching criteria */ | |
1850 | PCCERT_CHAIN_CONTEXT chainContext = NULL; | |
1851 | /* Certificate chain */ | |
1852 | PWSTR commonNameUnicode = NULL; | |
1853 | /* Unicode common name */ | |
1854 | LPSTR rgszUsages[] = { szOID_PKIX_KP_SERVER_AUTH, | |
1855 | szOID_SERVER_GATED_CRYPTO, | |
1856 | szOID_SGC_NETSCAPE }; | |
1857 | /* How are we using this certificate? */ | |
1858 | DWORD cUsages = sizeof(rgszUsages) / sizeof(LPSTR); | |
1859 | /* Number of ites in rgszUsages */ | |
1860 | DWORD count; /* 32 bit count variable */ | |
1861 | DWORD status; /* Return value */ | |
1862 | ||
1863 | ||
1864 | if (!cert) | |
1865 | return (SEC_E_WRONG_PRINCIPAL); | |
1866 | ||
1867 | /* | |
1868 | * Convert common name to Unicode. | |
1869 | */ | |
1870 | ||
1871 | if (!common_name || !*common_name) | |
1872 | return (SEC_E_WRONG_PRINCIPAL); | |
1873 | ||
1874 | count = MultiByteToWideChar(CP_ACP, 0, common_name, -1, NULL, 0); | |
1875 | commonNameUnicode = LocalAlloc(LMEM_FIXED, count * sizeof(WCHAR)); | |
1876 | if (!commonNameUnicode) | |
1877 | return (SEC_E_INSUFFICIENT_MEMORY); | |
1878 | ||
1879 | if (!MultiByteToWideChar(CP_ACP, 0, common_name, -1, commonNameUnicode, count)) | |
1880 | { | |
1881 | LocalFree(commonNameUnicode); | |
1882 | return (SEC_E_WRONG_PRINCIPAL); | |
1883 | } | |
1884 | ||
1885 | /* | |
1886 | * Build certificate chain. | |
1887 | */ | |
1888 | ||
1889 | ZeroMemory(&chainPara, sizeof(chainPara)); | |
1890 | ||
1891 | chainPara.cbSize = sizeof(chainPara); | |
1892 | chainPara.RequestedUsage.dwType = USAGE_MATCH_TYPE_OR; | |
1893 | chainPara.RequestedUsage.Usage.cUsageIdentifier = cUsages; | |
1894 | chainPara.RequestedUsage.Usage.rgpszUsageIdentifier = rgszUsages; | |
1895 | ||
1896 | if (!CertGetCertificateChain(NULL, cert, NULL, cert->hCertStore, &chainPara, 0, NULL, &chainContext)) | |
1897 | { | |
1898 | status = GetLastError(); | |
1899 | DEBUG_printf(("CertGetCertificateChain returned 0x%x\n", status)); | |
1900 | ||
1901 | LocalFree(commonNameUnicode); | |
1902 | return (status); | |
1903 | } | |
1904 | ||
1905 | /* | |
1906 | * Validate certificate chain. | |
1907 | */ | |
1908 | ||
1909 | ZeroMemory(&httpsPolicy, sizeof(HTTPSPolicyCallbackData)); | |
1910 | httpsPolicy.cbStruct = sizeof(HTTPSPolicyCallbackData); | |
1911 | httpsPolicy.dwAuthType = AUTHTYPE_SERVER; | |
1912 | httpsPolicy.fdwChecks = dwCertFlags; | |
1913 | httpsPolicy.pwszServerName = commonNameUnicode; | |
1914 | ||
1915 | memset(&policyPara, 0, sizeof(policyPara)); | |
1916 | policyPara.cbSize = sizeof(policyPara); | |
1917 | policyPara.pvExtraPolicyPara = &httpsPolicy; | |
1918 | ||
1919 | memset(&policyStatus, 0, sizeof(policyStatus)); | |
1920 | policyStatus.cbSize = sizeof(policyStatus); | |
1921 | ||
1922 | if (!CertVerifyCertificateChainPolicy(CERT_CHAIN_POLICY_SSL, chainContext, &policyPara, &policyStatus)) | |
1923 | { | |
1924 | status = GetLastError(); | |
1925 | DEBUG_printf(("CertVerifyCertificateChainPolicy returned %d", status)); | |
1926 | } | |
1927 | else if (policyStatus.dwError) | |
1928 | status = policyStatus.dwError; | |
1929 | else | |
1930 | status = SEC_E_OK; | |
1931 | ||
1932 | if (chainContext) | |
1933 | CertFreeCertificateChain(chainContext); | |
1934 | ||
1935 | if (commonNameUnicode) | |
1936 | LocalFree(commonNameUnicode); | |
1937 | ||
1938 | return (status); | |
1939 | } | |
1940 | #endif // 0 | |
1941 | ||
1942 | ||
1943 | /* | |
1944 | * End of "$Id$". | |
1945 | */ |