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1 | /* |
2 | * "$Id: tls-sspi.c 12047 2014-07-18 13:53:34Z msweet $" | |
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_CN_INVALID | |
42 | # define SECURITY_FLAG_IGNORE_CERT_CN_INVALID 0x00001000 /* Common name does not match */ | |
43 | #endif /* !SECURITY_FLAG_IGNORE_CERT_CN_INVALID */ | |
44 | ||
45 | #ifndef SECURITY_FLAG_IGNORE_CERT_DATE_INVALID | |
46 | # define SECURITY_FLAG_IGNORE_CERT_DATE_INVALID 0x00002000 /* Expired X509 Cert. */ | |
47 | #endif /* !SECURITY_FLAG_IGNORE_CERT_DATE_INVALID */ | |
48 | ||
49 | /* | |
50 | * Local functions... | |
51 | */ | |
52 | ||
53 | static _http_sspi_t *http_sspi_alloc(void); | |
54 | static int http_sspi_client(http_t *http, const char *hostname); | |
55 | static PCCERT_CONTEXT http_sspi_create_credential(http_credential_t *cred); | |
56 | static BOOL http_sspi_find_credentials(http_t *http, const LPWSTR containerName, const char *common_name); | |
57 | static void http_sspi_free(_http_sspi_t *sspi); | |
58 | static BOOL http_sspi_make_credentials(_http_sspi_t *sspi, const LPWSTR containerName, const char *common_name, _http_mode_t mode, int years); | |
59 | static int http_sspi_server(http_t *http, const char *hostname); | |
60 | static void http_sspi_set_allows_any_root(_http_sspi_t *sspi, BOOL allow); | |
61 | static void http_sspi_set_allows_expired_certs(_http_sspi_t *sspi, BOOL allow); | |
62 | static const char *http_sspi_strerror(char *buffer, size_t bufsize, DWORD code); | |
63 | static DWORD http_sspi_verify(PCCERT_CONTEXT cert, const char *common_name, DWORD dwCertFlags); | |
64 | ||
65 | ||
66 | /* | |
67 | * 'cupsMakeServerCredentials()' - Make a self-signed certificate and private key pair. | |
68 | * | |
69 | * @since CUPS 2.0@ | |
70 | */ | |
71 | ||
72 | int /* O - 1 on success, 0 on failure */ | |
73 | cupsMakeServerCredentials( | |
74 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
75 | const char *common_name, /* I - Common name */ | |
76 | int num_alt_names, /* I - Number of subject alternate names */ | |
77 | const char **alt_names, /* I - Subject Alternate Names */ | |
78 | time_t expiration_date) /* I - Expiration date */ | |
79 | { | |
80 | _http_sspi_t *sspi; /* SSPI data */ | |
81 | int ret; /* Return value */ | |
82 | ||
83 | ||
84 | 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)); | |
85 | ||
86 | (void)path; | |
87 | (void)num_alt_names; | |
88 | (void)alt_names; | |
89 | ||
90 | sspi = http_sspi_alloc(); | |
91 | ret = http_sspi_make_credentials(sspi, L"ServerContainer", common_name, _HTTP_MODE_SERVER, (int)((expiration_date - time(NULL) + 86399) / 86400 / 365)); | |
92 | ||
93 | http_sspi_free(sspi); | |
94 | ||
95 | return (ret); | |
96 | } | |
97 | ||
98 | ||
99 | /* | |
100 | * 'cupsSetServerCredentials()' - Set the default server credentials. | |
101 | * | |
102 | * Note: The server credentials are used by all threads in the running process. | |
103 | * This function is threadsafe. | |
104 | * | |
105 | * @since CUPS 2.0@ | |
106 | */ | |
107 | ||
108 | int /* O - 1 on success, 0 on failure */ | |
109 | cupsSetServerCredentials( | |
110 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
111 | const char *common_name, /* I - Default common name for server */ | |
112 | int auto_create) /* I - 1 = automatically create self-signed certificates */ | |
113 | { | |
114 | DEBUG_printf(("cupsSetServerCredentials(path=\"%s\", common_name=\"%s\", auto_create=%d)", path, common_name, auto_create)); | |
115 | ||
116 | (void)path; | |
117 | (void)common_name; | |
118 | (void)auto_create; | |
119 | ||
120 | return (0); | |
121 | } | |
122 | ||
123 | ||
124 | /* | |
125 | * 'httpCopyCredentials()' - Copy the credentials associated with the peer in | |
126 | * an encrypted connection. | |
127 | * | |
128 | * @since CUPS 1.5/OS X 10.7@ | |
129 | */ | |
130 | ||
131 | int /* O - Status of call (0 = success) */ | |
132 | httpCopyCredentials( | |
133 | http_t *http, /* I - Connection to server */ | |
134 | cups_array_t **credentials) /* O - Array of credentials */ | |
135 | { | |
136 | DEBUG_printf(("httpCopyCredentials(http=%p, credentials=%p)", http, credentials)); | |
137 | ||
138 | if (!http || !http->tls || !http->tls->remoteCert || !credentials) | |
139 | { | |
140 | if (credentials) | |
141 | *credentials = NULL; | |
142 | ||
143 | return (-1); | |
144 | } | |
145 | ||
146 | *credentials = cupsArrayNew(NULL, NULL); | |
147 | httpAddCredential(*credentials, http->tls->remoteCert->pbCertEncoded, http->tls->remoteCert->cbCertEncoded); | |
148 | ||
149 | return (0); | |
150 | } | |
151 | ||
152 | ||
153 | /* | |
154 | * '_httpCreateCredentials()' - Create credentials in the internal format. | |
155 | */ | |
156 | ||
157 | http_tls_credentials_t /* O - Internal credentials */ | |
158 | _httpCreateCredentials( | |
159 | cups_array_t *credentials) /* I - Array of credentials */ | |
160 | { | |
161 | return (http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials))); | |
162 | } | |
163 | ||
164 | ||
165 | /* | |
166 | * 'httpCredentialsAreValidForName()' - Return whether the credentials are valid for the given name. | |
167 | * | |
168 | * @since CUPS 2.0@ | |
169 | */ | |
170 | ||
171 | int /* O - 1 if valid, 0 otherwise */ | |
172 | httpCredentialsAreValidForName( | |
173 | cups_array_t *credentials, /* I - Credentials */ | |
174 | const char *common_name) /* I - Name to check */ | |
175 | { | |
176 | int valid = 1; /* Valid name? */ | |
177 | PCCERT_CONTEXT cert = http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
178 | /* Certificate */ | |
179 | char cert_name[1024]; /* Name from certificate */ | |
180 | ||
181 | ||
182 | if (cert) | |
183 | { | |
184 | if (CertNameToStr(X509_ASN_ENCODING, &(cert->pCertInfo->Subject), CERT_SIMPLE_NAME_STR, cert_name, sizeof(cert_name))) | |
185 | { | |
186 | /* | |
187 | * Extract common name at end... | |
188 | */ | |
189 | ||
190 | char *ptr = strrchr(cert_name, ','); | |
191 | if (ptr && ptr[1]) | |
192 | _cups_strcpy(cert_name, ptr + 2); | |
193 | } | |
194 | else | |
195 | strlcpy(cert_name, "unknown", sizeof(cert_name)); | |
196 | ||
197 | CertFreeCertificateContext(cert); | |
198 | } | |
199 | else | |
200 | strlcpy(cert_name, "unknown", sizeof(cert_name)); | |
201 | ||
202 | /* | |
203 | * Compare the common names... | |
204 | */ | |
205 | ||
206 | if (_cups_strcasecmp(common_name, cert_name)) | |
207 | { | |
208 | /* | |
209 | * Not an exact match for the common name, check for wildcard certs... | |
210 | */ | |
211 | ||
212 | const char *domain = strchr(common_name, '.'); | |
213 | /* Domain in common name */ | |
214 | ||
215 | if (strncmp(cert_name, "*.", 2) || !domain || _cups_strcasecmp(domain, cert_name + 1)) | |
216 | { | |
217 | /* | |
218 | * Not a wildcard match. | |
219 | */ | |
220 | ||
221 | /* TODO: Check subject alternate names */ | |
222 | valid = 0; | |
223 | } | |
224 | } | |
225 | ||
226 | return (valid); | |
227 | } | |
228 | ||
229 | ||
230 | /* | |
231 | * 'httpCredentialsGetTrust()' - Return the trust of credentials. | |
232 | * | |
233 | * @since CUPS 2.0@ | |
234 | */ | |
235 | ||
236 | http_trust_t /* O - Level of trust */ | |
237 | httpCredentialsGetTrust( | |
238 | cups_array_t *credentials, /* I - Credentials */ | |
239 | const char *common_name) /* I - Common name for trust lookup */ | |
240 | { | |
241 | http_trust_t trust = HTTP_TRUST_OK; /* Level of trust */ | |
242 | PCCERT_CONTEXT cert = NULL; /* Certificate to validate */ | |
243 | DWORD certFlags = 0; /* Cert verification flags */ | |
244 | _cups_globals_t *cg = _cupsGlobals(); /* Per-thread global data */ | |
245 | ||
246 | ||
247 | if (!common_name) | |
248 | return (HTTP_TRUST_UNKNOWN); | |
249 | ||
250 | cert = http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
251 | if (!cert) | |
252 | return (HTTP_TRUST_UNKNOWN); | |
253 | ||
254 | if (cg->any_root) | |
255 | certFlags |= SECURITY_FLAG_IGNORE_UNKNOWN_CA; | |
256 | ||
257 | if (cg->expired_certs) | |
258 | certFlags |= SECURITY_FLAG_IGNORE_CERT_DATE_INVALID; | |
259 | ||
260 | if (!cg->validate_certs) | |
261 | certFlags |= SECURITY_FLAG_IGNORE_CERT_CN_INVALID; | |
262 | ||
263 | if (http_sspi_verify(cert, common_name, certFlags) != SEC_E_OK) | |
264 | trust = HTTP_TRUST_INVALID; | |
265 | ||
266 | CertFreeCertificateContext(cert); | |
267 | ||
268 | return (trust); | |
269 | } | |
270 | ||
271 | ||
272 | /* | |
273 | * 'httpCredentialsGetExpiration()' - Return the expiration date of the credentials. | |
274 | * | |
275 | * @since CUPS 2.0@ | |
276 | */ | |
277 | ||
278 | time_t /* O - Expiration date of credentials */ | |
279 | httpCredentialsGetExpiration( | |
280 | cups_array_t *credentials) /* I - Credentials */ | |
281 | { | |
282 | time_t expiration_date = 0; /* Expiration data of credentials */ | |
283 | PCCERT_CONTEXT cert = http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
284 | /* Certificate */ | |
285 | ||
286 | if (cert) | |
287 | { | |
288 | SYSTEMTIME systime; /* System time */ | |
289 | struct tm tm; /* UNIX date/time */ | |
290 | ||
291 | FileTimeToSystemTime(&(cert->pCertInfo->NotAfter), &systime); | |
292 | ||
293 | tm.tm_year = systime.wYear - 1900; | |
294 | tm.tm_mon = systime.wMonth - 1; | |
295 | tm.tm_mday = systime.wDay; | |
296 | tm.tm_hour = systime.wHour; | |
297 | tm.tm_min = systime.wMinute; | |
298 | tm.tm_sec = systime.wSecond; | |
299 | ||
300 | expiration_date = mktime(&tm); | |
301 | ||
302 | CertFreeCertificateContext(cert); | |
303 | } | |
304 | ||
305 | return (expiration_date); | |
306 | } | |
307 | ||
308 | ||
309 | /* | |
310 | * 'httpCredentialsString()' - Return a string representing the credentials. | |
311 | * | |
312 | * @since CUPS 2.0@ | |
313 | */ | |
314 | ||
315 | size_t /* O - Total size of credentials string */ | |
316 | httpCredentialsString( | |
317 | cups_array_t *credentials, /* I - Credentials */ | |
318 | char *buffer, /* I - Buffer or @code NULL@ */ | |
319 | size_t bufsize) /* I - Size of buffer */ | |
320 | { | |
321 | http_credential_t *first = (http_credential_t *)cupsArrayFirst(credentials); | |
322 | /* First certificate */ | |
323 | PCCERT_CONTEXT cert; /* Certificate */ | |
324 | ||
325 | ||
326 | DEBUG_printf(("httpCredentialsString(credentials=%p, buffer=%p, bufsize=" CUPS_LLFMT ")", credentials, buffer, CUPS_LLCAST bufsize)); | |
327 | ||
328 | if (!buffer) | |
329 | return (0); | |
330 | ||
331 | if (buffer && bufsize > 0) | |
332 | *buffer = '\0'; | |
333 | ||
334 | cert = http_sspi_create_credential(first); | |
335 | ||
336 | if (cert) | |
337 | { | |
338 | char cert_name[256]; /* Common name */ | |
339 | SYSTEMTIME systime; /* System time */ | |
340 | struct tm tm; /* UNIX date/time */ | |
341 | time_t expiration; /* Expiration date of cert */ | |
342 | _cups_md5_state_t md5_state; /* MD5 state */ | |
343 | unsigned char md5_digest[16]; /* MD5 result */ | |
344 | ||
345 | FileTimeToSystemTime(&(cert->pCertInfo->NotAfter), &systime); | |
346 | ||
347 | tm.tm_year = systime.wYear - 1900; | |
348 | tm.tm_mon = systime.wMonth - 1; | |
349 | tm.tm_mday = systime.wDay; | |
350 | tm.tm_hour = systime.wHour; | |
351 | tm.tm_min = systime.wMinute; | |
352 | tm.tm_sec = systime.wSecond; | |
353 | ||
354 | expiration = mktime(&tm); | |
355 | ||
356 | if (CertNameToStr(X509_ASN_ENCODING, &(cert->pCertInfo->Subject), CERT_SIMPLE_NAME_STR, cert_name, sizeof(cert_name))) | |
357 | { | |
358 | /* | |
359 | * Extract common name at end... | |
360 | */ | |
361 | ||
362 | char *ptr = strrchr(cert_name, ','); | |
363 | if (ptr && ptr[1]) | |
364 | _cups_strcpy(cert_name, ptr + 2); | |
365 | } | |
366 | else | |
367 | strlcpy(cert_name, "unknown", sizeof(cert_name)); | |
368 | ||
369 | _cupsMD5Init(&md5_state); | |
370 | _cupsMD5Append(&md5_state, first->data, (int)first->datalen); | |
371 | _cupsMD5Finish(&md5_state, md5_digest); | |
372 | ||
373 | snprintf(buffer, bufsize, "%s / %s / %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X", cert_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]); | |
374 | ||
375 | CertFreeCertificateContext(cert); | |
376 | } | |
377 | ||
378 | DEBUG_printf(("1httpCredentialsString: Returning \"%s\".", buffer)); | |
379 | ||
380 | return (strlen(buffer)); | |
381 | } | |
382 | ||
383 | ||
384 | /* | |
385 | * '_httpFreeCredentials()' - Free internal credentials. | |
386 | */ | |
387 | ||
388 | void | |
389 | _httpFreeCredentials( | |
390 | http_tls_credentials_t credentials) /* I - Internal credentials */ | |
391 | { | |
392 | if (!credentials) | |
393 | return; | |
394 | ||
395 | CertFreeCertificateContext(credentials); | |
396 | } | |
397 | ||
398 | ||
399 | /* | |
400 | * 'httpLoadCredentials()' - Load X.509 credentials from a keychain file. | |
401 | * | |
402 | * @since CUPS 2.0@ | |
403 | */ | |
404 | ||
405 | int /* O - 0 on success, -1 on error */ | |
406 | httpLoadCredentials( | |
407 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
408 | cups_array_t **credentials, /* IO - Credentials */ | |
409 | const char *common_name) /* I - Common name for credentials */ | |
410 | { | |
411 | HCERTSTORE store = NULL; /* Certificate store */ | |
412 | PCCERT_CONTEXT storedContext = NULL; /* Context created from the store */ | |
413 | DWORD dwSize = 0; /* 32 bit size */ | |
414 | PBYTE p = NULL; /* Temporary storage */ | |
415 | HCRYPTPROV hProv = (HCRYPTPROV)NULL; | |
416 | /* Handle to a CSP */ | |
417 | CERT_NAME_BLOB sib; /* Arbitrary array of bytes */ | |
418 | #ifdef DEBUG | |
419 | char error[1024]; /* Error message buffer */ | |
420 | #endif /* DEBUG */ | |
421 | ||
422 | ||
423 | DEBUG_printf(("httpLoadCredentials(path=\"%s\", credentials=%p, common_name=\"%s\")", path, credentials, common_name)); | |
424 | ||
425 | (void)path; | |
426 | ||
427 | if (credentials) | |
428 | { | |
429 | *credentials = NULL; | |
430 | } | |
431 | else | |
432 | { | |
433 | DEBUG_puts("1httpLoadCredentials: NULL credentials pointer, returning -1."); | |
434 | return (-1); | |
435 | } | |
436 | ||
437 | if (!common_name) | |
438 | { | |
439 | DEBUG_puts("1httpLoadCredentials: Bad common name, returning -1."); | |
440 | return (-1); | |
441 | } | |
442 | ||
443 | if (!CryptAcquireContextW(&hProv, L"RememberedContainer", MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET)) | |
444 | { | |
445 | if (GetLastError() == NTE_EXISTS) | |
446 | { | |
447 | if (!CryptAcquireContextW(&hProv, L"RememberedContainer", MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET)) | |
448 | { | |
449 | DEBUG_printf(("1httpLoadCredentials: CryptAcquireContext failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
450 | goto cleanup; | |
451 | } | |
452 | } | |
453 | } | |
454 | ||
455 | store = CertOpenStore(CERT_STORE_PROV_SYSTEM, X509_ASN_ENCODING|PKCS_7_ASN_ENCODING, hProv, CERT_SYSTEM_STORE_LOCAL_MACHINE | CERT_STORE_NO_CRYPT_RELEASE_FLAG | CERT_STORE_OPEN_EXISTING_FLAG, L"MY"); | |
456 | ||
457 | if (!store) | |
458 | { | |
459 | DEBUG_printf(("1httpLoadCredentials: CertOpenSystemStore failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
460 | goto cleanup; | |
461 | } | |
462 | ||
463 | dwSize = 0; | |
464 | ||
465 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, NULL, &dwSize, NULL)) | |
466 | { | |
467 | DEBUG_printf(("1httpLoadCredentials: CertStrToName failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
468 | goto cleanup; | |
469 | } | |
470 | ||
471 | p = (PBYTE)malloc(dwSize); | |
472 | ||
473 | if (!p) | |
474 | { | |
475 | DEBUG_printf(("1httpLoadCredentials: malloc failed for %d bytes.", dwSize)); | |
476 | goto cleanup; | |
477 | } | |
478 | ||
479 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, p, &dwSize, NULL)) | |
480 | { | |
481 | DEBUG_printf(("1httpLoadCredentials: CertStrToName failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
482 | goto cleanup; | |
483 | } | |
484 | ||
485 | sib.cbData = dwSize; | |
486 | sib.pbData = p; | |
487 | ||
488 | storedContext = CertFindCertificateInStore(store, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, 0, CERT_FIND_SUBJECT_NAME, &sib, NULL); | |
489 | ||
490 | if (!storedContext) | |
491 | { | |
492 | DEBUG_printf(("1httpLoadCredentials: Unable to find credentials for \"%s\".", common_name)); | |
493 | goto cleanup; | |
494 | } | |
495 | ||
496 | *credentials = cupsArrayNew(NULL, NULL); | |
497 | httpAddCredential(*credentials, storedContext->pbCertEncoded, storedContext->cbCertEncoded); | |
498 | ||
499 | cleanup: | |
500 | ||
501 | /* | |
502 | * Cleanup | |
503 | */ | |
504 | ||
505 | if (storedContext) | |
506 | CertFreeCertificateContext(storedContext); | |
507 | ||
508 | if (p) | |
509 | free(p); | |
510 | ||
511 | if (store) | |
512 | CertCloseStore(store, 0); | |
513 | ||
514 | if (hProv) | |
515 | CryptReleaseContext(hProv, 0); | |
516 | ||
517 | DEBUG_printf(("1httpLoadCredentials: Returning %d.", *credentials ? 0 : -1)); | |
518 | ||
519 | return (*credentials ? 0 : -1); | |
520 | } | |
521 | ||
522 | ||
523 | /* | |
524 | * 'httpSaveCredentials()' - Save X.509 credentials to a keychain file. | |
525 | * | |
526 | * @since CUPS 2.0@ | |
527 | */ | |
528 | ||
529 | int /* O - -1 on error, 0 on success */ | |
530 | httpSaveCredentials( | |
531 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
532 | cups_array_t *credentials, /* I - Credentials */ | |
533 | const char *common_name) /* I - Common name for credentials */ | |
534 | { | |
535 | HCERTSTORE store = NULL; /* Certificate store */ | |
536 | PCCERT_CONTEXT storedContext = NULL; /* Context created from the store */ | |
537 | PCCERT_CONTEXT createdContext = NULL; /* Context created by us */ | |
538 | DWORD dwSize = 0; /* 32 bit size */ | |
539 | PBYTE p = NULL; /* Temporary storage */ | |
540 | HCRYPTPROV hProv = (HCRYPTPROV)NULL; | |
541 | /* Handle to a CSP */ | |
542 | CRYPT_KEY_PROV_INFO ckp; /* Handle to crypto key */ | |
543 | int ret = -1; /* Return value */ | |
544 | #ifdef DEBUG | |
545 | char error[1024]; /* Error message buffer */ | |
546 | #endif /* DEBUG */ | |
547 | ||
548 | ||
549 | DEBUG_printf(("httpSaveCredentials(path=\"%s\", credentials=%p, common_name=\"%s\")", path, credentials, common_name)); | |
550 | ||
551 | (void)path; | |
552 | ||
553 | if (!common_name) | |
554 | { | |
555 | DEBUG_puts("1httpSaveCredentials: Bad common name, returning -1."); | |
556 | return (-1); | |
557 | } | |
558 | ||
559 | createdContext = http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
560 | if (!createdContext) | |
561 | { | |
562 | DEBUG_puts("1httpSaveCredentials: Bad credentials, returning -1."); | |
563 | return (-1); | |
564 | } | |
565 | ||
566 | if (!CryptAcquireContextW(&hProv, L"RememberedContainer", MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET)) | |
567 | { | |
568 | if (GetLastError() == NTE_EXISTS) | |
569 | { | |
570 | if (!CryptAcquireContextW(&hProv, L"RememberedContainer", MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET)) | |
571 | { | |
572 | DEBUG_printf(("1httpSaveCredentials: CryptAcquireContext failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
573 | goto cleanup; | |
574 | } | |
575 | } | |
576 | } | |
577 | ||
578 | store = CertOpenStore(CERT_STORE_PROV_SYSTEM, X509_ASN_ENCODING|PKCS_7_ASN_ENCODING, hProv, CERT_SYSTEM_STORE_LOCAL_MACHINE | CERT_STORE_NO_CRYPT_RELEASE_FLAG | CERT_STORE_OPEN_EXISTING_FLAG, L"MY"); | |
579 | ||
580 | if (!store) | |
581 | { | |
582 | DEBUG_printf(("1httpSaveCredentials: CertOpenSystemStore failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
583 | goto cleanup; | |
584 | } | |
585 | ||
586 | dwSize = 0; | |
587 | ||
588 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, NULL, &dwSize, NULL)) | |
589 | { | |
590 | DEBUG_printf(("1httpSaveCredentials: CertStrToName failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
591 | goto cleanup; | |
592 | } | |
593 | ||
594 | p = (PBYTE)malloc(dwSize); | |
595 | ||
596 | if (!p) | |
597 | { | |
598 | DEBUG_printf(("1httpSaveCredentials: malloc failed for %d bytes.", dwSize)); | |
599 | goto cleanup; | |
600 | } | |
601 | ||
602 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, p, &dwSize, NULL)) | |
603 | { | |
604 | DEBUG_printf(("1httpSaveCredentials: CertStrToName failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
605 | goto cleanup; | |
606 | } | |
607 | ||
608 | /* | |
609 | * Add the created context to the named store, and associate it with the named | |
610 | * container... | |
611 | */ | |
612 | ||
613 | if (!CertAddCertificateContextToStore(store, createdContext, CERT_STORE_ADD_REPLACE_EXISTING, &storedContext)) | |
614 | { | |
615 | DEBUG_printf(("1httpSaveCredentials: CertAddCertificateContextToStore failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
616 | goto cleanup; | |
617 | } | |
618 | ||
619 | ZeroMemory(&ckp, sizeof(ckp)); | |
620 | ckp.pwszContainerName = L"RememberedContainer"; | |
621 | ckp.pwszProvName = MS_DEF_PROV_W; | |
622 | ckp.dwProvType = PROV_RSA_FULL; | |
623 | ckp.dwFlags = CRYPT_MACHINE_KEYSET; | |
624 | ckp.dwKeySpec = AT_KEYEXCHANGE; | |
625 | ||
626 | if (!CertSetCertificateContextProperty(storedContext, CERT_KEY_PROV_INFO_PROP_ID, 0, &ckp)) | |
627 | { | |
628 | DEBUG_printf(("1httpSaveCredentials: CertSetCertificateContextProperty failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
629 | goto cleanup; | |
630 | } | |
631 | ||
632 | ret = 0; | |
633 | ||
634 | cleanup: | |
635 | ||
636 | /* | |
637 | * Cleanup | |
638 | */ | |
639 | ||
640 | if (createdContext) | |
641 | CertFreeCertificateContext(createdContext); | |
642 | ||
643 | if (storedContext) | |
644 | CertFreeCertificateContext(storedContext); | |
645 | ||
646 | if (p) | |
647 | free(p); | |
648 | ||
649 | if (store) | |
650 | CertCloseStore(store, 0); | |
651 | ||
652 | if (hProv) | |
653 | CryptReleaseContext(hProv, 0); | |
654 | ||
655 | DEBUG_printf(("1httpSaveCredentials: Returning %d.", ret)); | |
656 | return (ret); | |
657 | } | |
658 | ||
659 | ||
660 | /* | |
661 | * '_httpTLSInitialize()' - Initialize the TLS stack. | |
662 | */ | |
663 | ||
664 | void | |
665 | _httpTLSInitialize(void) | |
666 | { | |
667 | /* | |
668 | * Nothing to do... | |
669 | */ | |
670 | } | |
671 | ||
672 | ||
673 | /* | |
674 | * '_httpTLSPending()' - Return the number of pending TLS-encrypted bytes. | |
675 | */ | |
676 | ||
677 | size_t /* O - Bytes available */ | |
678 | _httpTLSPending(http_t *http) /* I - HTTP connection */ | |
679 | { | |
680 | if (http->tls) | |
681 | return (http->tls->readBufferUsed); | |
682 | else | |
683 | return (0); | |
684 | } | |
685 | ||
686 | ||
687 | /* | |
688 | * '_httpTLSRead()' - Read from a SSL/TLS connection. | |
689 | */ | |
690 | ||
691 | int /* O - Bytes read */ | |
692 | _httpTLSRead(http_t *http, /* I - HTTP connection */ | |
693 | char *buf, /* I - Buffer to store data */ | |
694 | int len) /* I - Length of buffer */ | |
695 | { | |
696 | int i; /* Looping var */ | |
697 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
698 | SecBufferDesc message; /* Array of SecBuffer struct */ | |
699 | SecBuffer buffers[4] = { 0 }; /* Security package buffer */ | |
700 | int num = 0; /* Return value */ | |
701 | PSecBuffer pDataBuffer; /* Data buffer */ | |
702 | PSecBuffer pExtraBuffer; /* Excess data buffer */ | |
703 | SECURITY_STATUS scRet; /* SSPI status */ | |
704 | ||
705 | ||
706 | DEBUG_printf(("4_httpTLSRead(http=%p, buf=%p, len=%d)", http, buf, len)); | |
707 | ||
708 | /* | |
709 | * If there are bytes that have already been decrypted and have not yet been | |
710 | * read, return those... | |
711 | */ | |
712 | ||
713 | if (sspi->readBufferUsed > 0) | |
714 | { | |
715 | int bytesToCopy = min(sspi->readBufferUsed, len); | |
716 | /* Number of bytes to copy */ | |
717 | ||
718 | memcpy(buf, sspi->readBuffer, bytesToCopy); | |
719 | sspi->readBufferUsed -= bytesToCopy; | |
720 | ||
721 | if (sspi->readBufferUsed > 0) | |
722 | memmove(sspi->readBuffer, sspi->readBuffer + bytesToCopy, sspi->readBufferUsed); | |
723 | ||
724 | DEBUG_printf(("5_httpTLSRead: Returning %d bytes previously decrypted.", bytesToCopy)); | |
725 | ||
726 | return (bytesToCopy); | |
727 | } | |
728 | ||
729 | /* | |
730 | * Initialize security buffer structs | |
731 | */ | |
732 | ||
733 | message.ulVersion = SECBUFFER_VERSION; | |
734 | message.cBuffers = 4; | |
735 | message.pBuffers = buffers; | |
736 | ||
737 | do | |
738 | { | |
739 | /* | |
740 | * If there is not enough space in the buffer, then increase its size... | |
741 | */ | |
742 | ||
743 | if (sspi->decryptBufferLength <= sspi->decryptBufferUsed) | |
744 | { | |
745 | BYTE *temp; /* New buffer */ | |
746 | ||
747 | if (sspi->decryptBufferLength >= 262144) | |
748 | { | |
749 | WSASetLastError(E_OUTOFMEMORY); | |
750 | DEBUG_puts("_httpTLSRead: Decryption buffer too large (>256k)"); | |
751 | return (-1); | |
752 | } | |
753 | ||
754 | if ((temp = realloc(sspi->decryptBuffer, sspi->decryptBufferLength + 4096)) == NULL) | |
755 | { | |
756 | DEBUG_printf(("_httpTLSRead: Unable to allocate %d byte decryption buffer.", sspi->decryptBufferLength + 4096)); | |
757 | WSASetLastError(E_OUTOFMEMORY); | |
758 | return (-1); | |
759 | } | |
760 | ||
761 | sspi->decryptBufferLength += 4096; | |
762 | sspi->decryptBuffer = temp; | |
763 | ||
764 | DEBUG_printf(("_httpTLSRead: Resized decryption buffer to %d bytes.", sspi->decryptBufferLength)); | |
765 | } | |
766 | ||
767 | buffers[0].pvBuffer = sspi->decryptBuffer; | |
768 | buffers[0].cbBuffer = (unsigned long)sspi->decryptBufferUsed; | |
769 | buffers[0].BufferType = SECBUFFER_DATA; | |
770 | buffers[1].BufferType = SECBUFFER_EMPTY; | |
771 | buffers[2].BufferType = SECBUFFER_EMPTY; | |
772 | buffers[3].BufferType = SECBUFFER_EMPTY; | |
773 | ||
774 | DEBUG_printf(("5_httpTLSRead: decryptBufferUsed=%d", sspi->decryptBufferUsed)); | |
775 | ||
776 | scRet = DecryptMessage(&sspi->context, &message, 0, NULL); | |
777 | ||
778 | if (scRet == SEC_E_INCOMPLETE_MESSAGE) | |
779 | { | |
780 | num = recv(http->fd, sspi->decryptBuffer + sspi->decryptBufferUsed, (int)(sspi->decryptBufferLength - sspi->decryptBufferUsed), 0); | |
781 | if (num < 0) | |
782 | { | |
783 | DEBUG_printf(("5_httpTLSRead: recv failed: %d", WSAGetLastError())); | |
784 | return (-1); | |
785 | } | |
786 | else if (num == 0) | |
787 | { | |
788 | DEBUG_puts("5_httpTLSRead: Server disconnected."); | |
789 | return (0); | |
790 | } | |
791 | ||
792 | DEBUG_printf(("5_httpTLSRead: Read %d bytes into decryption buffer.", num)); | |
793 | ||
794 | sspi->decryptBufferUsed += num; | |
795 | } | |
796 | } | |
797 | while (scRet == SEC_E_INCOMPLETE_MESSAGE); | |
798 | ||
799 | if (scRet == SEC_I_CONTEXT_EXPIRED) | |
800 | { | |
801 | DEBUG_puts("5_httpTLSRead: Context expired."); | |
802 | WSASetLastError(WSAECONNRESET); | |
803 | return (-1); | |
804 | } | |
805 | else if (scRet != SEC_E_OK) | |
806 | { | |
807 | DEBUG_printf(("5_httpTLSRead: DecryptMessage failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
808 | WSASetLastError(WSASYSCALLFAILURE); | |
809 | return (-1); | |
810 | } | |
811 | ||
812 | /* | |
813 | * The decryption worked. Now, locate data buffer. | |
814 | */ | |
815 | ||
816 | pDataBuffer = NULL; | |
817 | pExtraBuffer = NULL; | |
818 | ||
819 | for (i = 1; i < 4; i++) | |
820 | { | |
821 | if (buffers[i].BufferType == SECBUFFER_DATA) | |
822 | pDataBuffer = &buffers[i]; | |
823 | else if (!pExtraBuffer && (buffers[i].BufferType == SECBUFFER_EXTRA)) | |
824 | pExtraBuffer = &buffers[i]; | |
825 | } | |
826 | ||
827 | /* | |
828 | * If a data buffer is found, then copy the decrypted bytes to the passed-in | |
829 | * buffer... | |
830 | */ | |
831 | ||
832 | if (pDataBuffer) | |
833 | { | |
834 | int bytesToCopy = min((int)pDataBuffer->cbBuffer, len); | |
835 | /* Number of bytes to copy into buf */ | |
836 | int bytesToSave = pDataBuffer->cbBuffer - bytesToCopy; | |
837 | /* Number of bytes to save in our read buffer */ | |
838 | ||
839 | if (bytesToCopy) | |
840 | memcpy(buf, pDataBuffer->pvBuffer, bytesToCopy); | |
841 | ||
842 | /* | |
843 | * If there are more decrypted bytes than can be copied to the passed in | |
844 | * buffer, then save them... | |
845 | */ | |
846 | ||
847 | if (bytesToSave) | |
848 | { | |
849 | if ((sspi->readBufferLength - sspi->readBufferUsed) < bytesToSave) | |
850 | { | |
851 | BYTE *temp; /* New buffer pointer */ | |
852 | ||
853 | if ((temp = realloc(sspi->readBuffer, sspi->readBufferUsed + bytesToSave)) == NULL) | |
854 | { | |
855 | DEBUG_printf(("_httpTLSRead: Unable to allocate %d bytes.", sspi->readBufferUsed + bytesToSave)); | |
856 | WSASetLastError(E_OUTOFMEMORY); | |
857 | return (-1); | |
858 | } | |
859 | ||
860 | sspi->readBufferLength = sspi->readBufferUsed + bytesToSave; | |
861 | sspi->readBuffer = temp; | |
862 | } | |
863 | ||
864 | memcpy(((BYTE *)sspi->readBuffer) + sspi->readBufferUsed, ((BYTE *)pDataBuffer->pvBuffer) + bytesToCopy, bytesToSave); | |
865 | ||
866 | sspi->readBufferUsed += bytesToSave; | |
867 | } | |
868 | ||
869 | num = bytesToCopy; | |
870 | } | |
871 | else | |
872 | { | |
873 | DEBUG_puts("_httpTLSRead: Unable to find data buffer."); | |
874 | WSASetLastError(WSASYSCALLFAILURE); | |
875 | return (-1); | |
876 | } | |
877 | ||
878 | /* | |
879 | * If the decryption process left extra bytes, then save those back in | |
880 | * decryptBuffer. They will be processed the next time through the loop. | |
881 | */ | |
882 | ||
883 | if (pExtraBuffer) | |
884 | { | |
885 | memmove(sspi->decryptBuffer, pExtraBuffer->pvBuffer, pExtraBuffer->cbBuffer); | |
886 | sspi->decryptBufferUsed = pExtraBuffer->cbBuffer; | |
887 | } | |
888 | else | |
889 | { | |
890 | sspi->decryptBufferUsed = 0; | |
891 | } | |
892 | ||
893 | return (num); | |
894 | } | |
895 | ||
896 | ||
897 | /* | |
898 | * '_httpTLSStart()' - Set up SSL/TLS support on a connection. | |
899 | */ | |
900 | ||
901 | int /* O - 0 on success, -1 on failure */ | |
902 | _httpTLSStart(http_t *http) /* I - HTTP connection */ | |
903 | { | |
904 | char hostname[256], /* Hostname */ | |
905 | *hostptr; /* Pointer into hostname */ | |
906 | ||
907 | ||
908 | DEBUG_printf(("7_httpTLSStart(http=%p)", http)); | |
909 | ||
910 | if ((http->tls = http_sspi_alloc()) == NULL) | |
911 | return (-1); | |
912 | ||
913 | if (http->mode == _HTTP_MODE_CLIENT) | |
914 | { | |
915 | /* | |
916 | * Client: determine hostname... | |
917 | */ | |
918 | ||
919 | if (httpAddrLocalhost(http->hostaddr)) | |
920 | { | |
921 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
922 | } | |
923 | else | |
924 | { | |
925 | /* | |
926 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
927 | */ | |
928 | ||
929 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
930 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
931 | *hostptr == '.') | |
932 | *hostptr = '\0'; | |
933 | } | |
934 | ||
935 | return (http_sspi_client(http, hostname)); | |
936 | } | |
937 | else | |
938 | { | |
939 | /* | |
940 | * Server: determine hostname to use... | |
941 | */ | |
942 | ||
943 | if (http->fields[HTTP_FIELD_HOST][0]) | |
944 | { | |
945 | /* | |
946 | * Use hostname for TLS upgrade... | |
947 | */ | |
948 | ||
949 | strlcpy(hostname, http->fields[HTTP_FIELD_HOST], sizeof(hostname)); | |
950 | } | |
951 | else | |
952 | { | |
953 | /* | |
954 | * Resolve hostname from connection address... | |
955 | */ | |
956 | ||
957 | http_addr_t addr; /* Connection address */ | |
958 | socklen_t addrlen; /* Length of address */ | |
959 | ||
960 | addrlen = sizeof(addr); | |
961 | if (getsockname(http->fd, (struct sockaddr *)&addr, &addrlen)) | |
962 | { | |
963 | DEBUG_printf(("4_httpTLSStart: Unable to get socket address: %s", strerror(errno))); | |
964 | hostname[0] = '\0'; | |
965 | } | |
966 | else if (httpAddrLocalhost(&addr)) | |
967 | hostname[0] = '\0'; | |
968 | else | |
969 | { | |
970 | httpAddrLookup(&addr, hostname, sizeof(hostname)); | |
971 | DEBUG_printf(("4_httpTLSStart: Resolved socket address to \"%s\".", hostname)); | |
972 | } | |
973 | } | |
974 | ||
975 | return (http_sspi_server(http, hostname)); | |
976 | } | |
977 | } | |
978 | ||
979 | ||
980 | /* | |
981 | * '_httpTLSStop()' - Shut down SSL/TLS on a connection. | |
982 | */ | |
983 | ||
984 | void | |
985 | _httpTLSStop(http_t *http) /* I - HTTP connection */ | |
986 | { | |
987 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
988 | ||
989 | ||
990 | if (sspi->contextInitialized && http->fd >= 0) | |
991 | { | |
992 | SecBufferDesc message; /* Array of SecBuffer struct */ | |
993 | SecBuffer buffers[1] = { 0 }; | |
994 | /* Security package buffer */ | |
995 | DWORD dwType; /* Type */ | |
996 | DWORD status; /* Status */ | |
997 | ||
998 | /* | |
999 | * Notify schannel that we are about to close the connection. | |
1000 | */ | |
1001 | ||
1002 | dwType = SCHANNEL_SHUTDOWN; | |
1003 | ||
1004 | buffers[0].pvBuffer = &dwType; | |
1005 | buffers[0].BufferType = SECBUFFER_TOKEN; | |
1006 | buffers[0].cbBuffer = sizeof(dwType); | |
1007 | ||
1008 | message.cBuffers = 1; | |
1009 | message.pBuffers = buffers; | |
1010 | message.ulVersion = SECBUFFER_VERSION; | |
1011 | ||
1012 | status = ApplyControlToken(&sspi->context, &message); | |
1013 | ||
1014 | if (SUCCEEDED(status)) | |
1015 | { | |
1016 | PBYTE pbMessage; /* Message buffer */ | |
1017 | DWORD cbMessage; /* Message buffer count */ | |
1018 | DWORD cbData; /* Data count */ | |
1019 | DWORD dwSSPIFlags; /* SSL attributes we requested */ | |
1020 | DWORD dwSSPIOutFlags; /* SSL attributes we received */ | |
1021 | TimeStamp tsExpiry; /* Time stamp */ | |
1022 | ||
1023 | dwSSPIFlags = ASC_REQ_SEQUENCE_DETECT | | |
1024 | ASC_REQ_REPLAY_DETECT | | |
1025 | ASC_REQ_CONFIDENTIALITY | | |
1026 | ASC_REQ_EXTENDED_ERROR | | |
1027 | ASC_REQ_ALLOCATE_MEMORY | | |
1028 | ASC_REQ_STREAM; | |
1029 | ||
1030 | buffers[0].pvBuffer = NULL; | |
1031 | buffers[0].BufferType = SECBUFFER_TOKEN; | |
1032 | buffers[0].cbBuffer = 0; | |
1033 | ||
1034 | message.cBuffers = 1; | |
1035 | message.pBuffers = buffers; | |
1036 | message.ulVersion = SECBUFFER_VERSION; | |
1037 | ||
1038 | status = AcceptSecurityContext(&sspi->creds, &sspi->context, NULL, | |
1039 | dwSSPIFlags, SECURITY_NATIVE_DREP, NULL, | |
1040 | &message, &dwSSPIOutFlags, &tsExpiry); | |
1041 | ||
1042 | if (SUCCEEDED(status)) | |
1043 | { | |
1044 | pbMessage = buffers[0].pvBuffer; | |
1045 | cbMessage = buffers[0].cbBuffer; | |
1046 | ||
1047 | /* | |
1048 | * Send the close notify message to the client. | |
1049 | */ | |
1050 | ||
1051 | if (pbMessage && cbMessage) | |
1052 | { | |
1053 | cbData = send(http->fd, pbMessage, cbMessage, 0); | |
1054 | if ((cbData == SOCKET_ERROR) || (cbData == 0)) | |
1055 | { | |
1056 | status = WSAGetLastError(); | |
1057 | DEBUG_printf(("_httpTLSStop: sending close notify failed: %d", status)); | |
1058 | } | |
1059 | else | |
1060 | { | |
1061 | FreeContextBuffer(pbMessage); | |
1062 | } | |
1063 | } | |
1064 | } | |
1065 | else | |
1066 | { | |
1067 | DEBUG_printf(("_httpTLSStop: AcceptSecurityContext failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), status))); | |
1068 | } | |
1069 | } | |
1070 | else | |
1071 | { | |
1072 | DEBUG_printf(("_httpTLSStop: ApplyControlToken failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), status))); | |
1073 | } | |
1074 | } | |
1075 | ||
1076 | http_sspi_free(sspi); | |
1077 | ||
1078 | http->tls = NULL; | |
1079 | } | |
1080 | ||
1081 | ||
1082 | /* | |
1083 | * '_httpTLSWrite()' - Write to a SSL/TLS connection. | |
1084 | */ | |
1085 | ||
1086 | int /* O - Bytes written */ | |
1087 | _httpTLSWrite(http_t *http, /* I - HTTP connection */ | |
1088 | const char *buf, /* I - Buffer holding data */ | |
1089 | int len) /* I - Length of buffer */ | |
1090 | { | |
1091 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
1092 | SecBufferDesc message; /* Array of SecBuffer struct */ | |
1093 | SecBuffer buffers[4] = { 0 }; /* Security package buffer */ | |
1094 | int bufferLen; /* Buffer length */ | |
1095 | int bytesLeft; /* Bytes left to write */ | |
1096 | const char *bufptr; /* Pointer into buffer */ | |
1097 | int num = 0; /* Return value */ | |
1098 | ||
1099 | ||
1100 | bufferLen = sspi->streamSizes.cbMaximumMessage + sspi->streamSizes.cbHeader + sspi->streamSizes.cbTrailer; | |
1101 | ||
1102 | if (bufferLen > sspi->writeBufferLength) | |
1103 | { | |
1104 | BYTE *temp; /* New buffer pointer */ | |
1105 | ||
1106 | if ((temp = (BYTE *)realloc(sspi->writeBuffer, bufferLen)) == NULL) | |
1107 | { | |
1108 | DEBUG_printf(("_httpTLSWrite: Unable to allocate buffer of %d bytes.", bufferLen)); | |
1109 | WSASetLastError(E_OUTOFMEMORY); | |
1110 | return (-1); | |
1111 | } | |
1112 | ||
1113 | sspi->writeBuffer = temp; | |
1114 | sspi->writeBufferLength = bufferLen; | |
1115 | } | |
1116 | ||
1117 | bytesLeft = len; | |
1118 | bufptr = buf; | |
1119 | ||
1120 | while (bytesLeft) | |
1121 | { | |
1122 | int chunk = min((int)sspi->streamSizes.cbMaximumMessage, bytesLeft); | |
1123 | /* Size of data to write */ | |
1124 | SECURITY_STATUS scRet; /* SSPI status */ | |
1125 | ||
1126 | /* | |
1127 | * Copy user data into the buffer, starting just past the header... | |
1128 | */ | |
1129 | ||
1130 | memcpy(sspi->writeBuffer + sspi->streamSizes.cbHeader, bufptr, chunk); | |
1131 | ||
1132 | /* | |
1133 | * Setup the SSPI buffers | |
1134 | */ | |
1135 | ||
1136 | message.ulVersion = SECBUFFER_VERSION; | |
1137 | message.cBuffers = 4; | |
1138 | message.pBuffers = buffers; | |
1139 | ||
1140 | buffers[0].pvBuffer = sspi->writeBuffer; | |
1141 | buffers[0].cbBuffer = sspi->streamSizes.cbHeader; | |
1142 | buffers[0].BufferType = SECBUFFER_STREAM_HEADER; | |
1143 | buffers[1].pvBuffer = sspi->writeBuffer + sspi->streamSizes.cbHeader; | |
1144 | buffers[1].cbBuffer = (unsigned long) chunk; | |
1145 | buffers[1].BufferType = SECBUFFER_DATA; | |
1146 | buffers[2].pvBuffer = sspi->writeBuffer + sspi->streamSizes.cbHeader + chunk; | |
1147 | buffers[2].cbBuffer = sspi->streamSizes.cbTrailer; | |
1148 | buffers[2].BufferType = SECBUFFER_STREAM_TRAILER; | |
1149 | buffers[3].BufferType = SECBUFFER_EMPTY; | |
1150 | ||
1151 | /* | |
1152 | * Encrypt the data | |
1153 | */ | |
1154 | ||
1155 | scRet = EncryptMessage(&sspi->context, 0, &message, 0); | |
1156 | ||
1157 | if (FAILED(scRet)) | |
1158 | { | |
1159 | DEBUG_printf(("_httpTLSWrite: EncryptMessage failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1160 | WSASetLastError(WSASYSCALLFAILURE); | |
1161 | return (-1); | |
1162 | } | |
1163 | ||
1164 | /* | |
1165 | * Send the data. Remember the size of the total data to send is the size | |
1166 | * of the header, the size of the data the caller passed in and the size | |
1167 | * of the trailer... | |
1168 | */ | |
1169 | ||
1170 | num = send(http->fd, sspi->writeBuffer, buffers[0].cbBuffer + buffers[1].cbBuffer + buffers[2].cbBuffer, 0); | |
1171 | ||
1172 | if (num <= 0) | |
1173 | { | |
1174 | DEBUG_printf(("_httpTLSWrite: send failed: %ld", WSAGetLastError())); | |
1175 | return (num); | |
1176 | } | |
1177 | ||
1178 | bytesLeft -= chunk; | |
1179 | bufptr += chunk; | |
1180 | } | |
1181 | ||
1182 | return (len); | |
1183 | } | |
1184 | ||
1185 | ||
1186 | #if 0 | |
1187 | /* | |
1188 | * 'http_setup_ssl()' - Set up SSL/TLS support on a connection. | |
1189 | */ | |
1190 | ||
1191 | static int /* O - 0 on success, -1 on failure */ | |
1192 | http_setup_ssl(http_t *http) /* I - Connection to server */ | |
1193 | { | |
1194 | char hostname[256], /* Hostname */ | |
1195 | *hostptr; /* Pointer into hostname */ | |
1196 | ||
1197 | TCHAR username[256]; /* Username returned from GetUserName() */ | |
1198 | TCHAR commonName[256];/* Common name for certificate */ | |
1199 | DWORD dwSize; /* 32 bit size */ | |
1200 | ||
1201 | ||
1202 | DEBUG_printf(("7http_setup_ssl(http=%p)", http)); | |
1203 | ||
1204 | /* | |
1205 | * Get the hostname to use for SSL... | |
1206 | */ | |
1207 | ||
1208 | if (httpAddrLocalhost(http->hostaddr)) | |
1209 | { | |
1210 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
1211 | } | |
1212 | else | |
1213 | { | |
1214 | /* | |
1215 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
1216 | */ | |
1217 | ||
1218 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
1219 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
1220 | *hostptr == '.') | |
1221 | *hostptr = '\0'; | |
1222 | } | |
1223 | ||
1224 | http->tls = http_sspi_alloc(); | |
1225 | ||
1226 | if (!http->tls) | |
1227 | { | |
1228 | _cupsSetHTTPError(HTTP_STATUS_ERROR); | |
1229 | return (-1); | |
1230 | } | |
1231 | ||
1232 | dwSize = sizeof(username) / sizeof(TCHAR); | |
1233 | GetUserName(username, &dwSize); | |
1234 | _sntprintf_s(commonName, sizeof(commonName) / sizeof(TCHAR), | |
1235 | sizeof(commonName) / sizeof(TCHAR), TEXT("CN=%s"), username); | |
1236 | ||
1237 | if (!_sspiGetCredentials(http->tls, L"ClientContainer", | |
1238 | commonName, FALSE)) | |
1239 | { | |
1240 | _sspiFree(http->tls); | |
1241 | http->tls = NULL; | |
1242 | ||
1243 | http->error = EIO; | |
1244 | http->status = HTTP_STATUS_ERROR; | |
1245 | ||
1246 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, | |
1247 | _("Unable to establish a secure connection to host."), 1); | |
1248 | ||
1249 | return (-1); | |
1250 | } | |
1251 | ||
1252 | _sspiSetAllowsAnyRoot(http->tls, TRUE); | |
1253 | _sspiSetAllowsExpiredCerts(http->tls, TRUE); | |
1254 | ||
1255 | if (!_sspiConnect(http->tls, hostname)) | |
1256 | { | |
1257 | _sspiFree(http->tls); | |
1258 | http->tls = NULL; | |
1259 | ||
1260 | http->error = EIO; | |
1261 | http->status = HTTP_STATUS_ERROR; | |
1262 | ||
1263 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, | |
1264 | _("Unable to establish a secure connection to host."), 1); | |
1265 | ||
1266 | return (-1); | |
1267 | } | |
1268 | ||
1269 | return (0); | |
1270 | } | |
1271 | #endif // 0 | |
1272 | ||
1273 | ||
1274 | /* | |
1275 | * 'http_sspi_alloc()' - Allocate SSPI object. | |
1276 | */ | |
1277 | ||
1278 | static _http_sspi_t * /* O - New SSPI/SSL object */ | |
1279 | http_sspi_alloc(void) | |
1280 | { | |
1281 | return ((_http_sspi_t *)calloc(sizeof(_http_sspi_t), 1)); | |
1282 | } | |
1283 | ||
1284 | ||
1285 | /* | |
1286 | * 'http_sspi_client()' - Negotiate a TLS connection as a client. | |
1287 | */ | |
1288 | ||
1289 | static int /* O - 0 on success, -1 on failure */ | |
1290 | http_sspi_client(http_t *http, /* I - Client connection */ | |
1291 | const char *hostname) /* I - Server hostname */ | |
1292 | { | |
1293 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
1294 | DWORD dwSize; /* Size for buffer */ | |
1295 | DWORD dwSSPIFlags; /* SSL connection attributes we want */ | |
1296 | DWORD dwSSPIOutFlags; /* SSL connection attributes we got */ | |
1297 | TimeStamp tsExpiry; /* Time stamp */ | |
1298 | SECURITY_STATUS scRet; /* Status */ | |
1299 | int cbData; /* Data count */ | |
1300 | SecBufferDesc inBuffer; /* Array of SecBuffer structs */ | |
1301 | SecBuffer inBuffers[2]; /* Security package buffer */ | |
1302 | SecBufferDesc outBuffer; /* Array of SecBuffer structs */ | |
1303 | SecBuffer outBuffers[1]; /* Security package buffer */ | |
1304 | int ret = 0; /* Return value */ | |
1305 | char username[1024], /* Current username */ | |
1306 | common_name[1024]; /* CN=username */ | |
1307 | ||
1308 | ||
1309 | DEBUG_printf(("4http_sspi_client(http=%p, hostname=\"%s\")", http, hostname)); | |
1310 | ||
1311 | dwSSPIFlags = ISC_REQ_SEQUENCE_DETECT | | |
1312 | ISC_REQ_REPLAY_DETECT | | |
1313 | ISC_REQ_CONFIDENTIALITY | | |
1314 | ISC_RET_EXTENDED_ERROR | | |
1315 | ISC_REQ_ALLOCATE_MEMORY | | |
1316 | ISC_REQ_STREAM; | |
1317 | ||
1318 | /* | |
1319 | * Lookup the client certificate... | |
1320 | */ | |
1321 | ||
1322 | dwSize = sizeof(username); | |
1323 | GetUserName(username, &dwSize); | |
1324 | snprintf(common_name, sizeof(common_name), "CN=%s", username); | |
1325 | ||
1326 | if (!http_sspi_find_credentials(http, L"ClientContainer", common_name)) | |
1327 | if (!http_sspi_make_credentials(http->tls, L"ClientContainer", common_name, _HTTP_MODE_CLIENT, 10)) | |
1328 | { | |
1329 | DEBUG_puts("5http_sspi_client: Unable to get client credentials."); | |
1330 | return (-1); | |
1331 | } | |
1332 | ||
1333 | /* | |
1334 | * Initiate a ClientHello message and generate a token. | |
1335 | */ | |
1336 | ||
1337 | outBuffers[0].pvBuffer = NULL; | |
1338 | outBuffers[0].BufferType = SECBUFFER_TOKEN; | |
1339 | outBuffers[0].cbBuffer = 0; | |
1340 | ||
1341 | outBuffer.cBuffers = 1; | |
1342 | outBuffer.pBuffers = outBuffers; | |
1343 | outBuffer.ulVersion = SECBUFFER_VERSION; | |
1344 | ||
1345 | scRet = InitializeSecurityContext(&sspi->creds, NULL, TEXT(""), dwSSPIFlags, 0, SECURITY_NATIVE_DREP, NULL, 0, &sspi->context, &outBuffer, &dwSSPIOutFlags, &tsExpiry); | |
1346 | ||
1347 | if (scRet != SEC_I_CONTINUE_NEEDED) | |
1348 | { | |
1349 | DEBUG_printf(("5http_sspi_client: InitializeSecurityContext(1) failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1350 | return (-1); | |
1351 | } | |
1352 | ||
1353 | /* | |
1354 | * Send response to server if there is one. | |
1355 | */ | |
1356 | ||
1357 | if (outBuffers[0].cbBuffer && outBuffers[0].pvBuffer) | |
1358 | { | |
1359 | if ((cbData = send(http->fd, outBuffers[0].pvBuffer, outBuffers[0].cbBuffer, 0)) <= 0) | |
1360 | { | |
1361 | DEBUG_printf(("5http_sspi_client: send failed: %d", WSAGetLastError())); | |
1362 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1363 | DeleteSecurityContext(&sspi->context); | |
1364 | return (-1); | |
1365 | } | |
1366 | ||
1367 | DEBUG_printf(("5http_sspi_client: %d bytes of handshake data sent.", cbData)); | |
1368 | ||
1369 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1370 | outBuffers[0].pvBuffer = NULL; | |
1371 | } | |
1372 | ||
1373 | dwSSPIFlags = ISC_REQ_MANUAL_CRED_VALIDATION | | |
1374 | ISC_REQ_SEQUENCE_DETECT | | |
1375 | ISC_REQ_REPLAY_DETECT | | |
1376 | ISC_REQ_CONFIDENTIALITY | | |
1377 | ISC_RET_EXTENDED_ERROR | | |
1378 | ISC_REQ_ALLOCATE_MEMORY | | |
1379 | ISC_REQ_STREAM; | |
1380 | ||
1381 | sspi->decryptBufferUsed = 0; | |
1382 | ||
1383 | /* | |
1384 | * Loop until the handshake is finished or an error occurs. | |
1385 | */ | |
1386 | ||
1387 | scRet = SEC_I_CONTINUE_NEEDED; | |
1388 | ||
1389 | while(scRet == SEC_I_CONTINUE_NEEDED || | |
1390 | scRet == SEC_E_INCOMPLETE_MESSAGE || | |
1391 | scRet == SEC_I_INCOMPLETE_CREDENTIALS) | |
1392 | { | |
1393 | if (sspi->decryptBufferUsed == 0 || scRet == SEC_E_INCOMPLETE_MESSAGE) | |
1394 | { | |
1395 | if (sspi->decryptBufferLength <= sspi->decryptBufferUsed) | |
1396 | { | |
1397 | BYTE *temp; /* New buffer */ | |
1398 | ||
1399 | if (sspi->decryptBufferLength >= 262144) | |
1400 | { | |
1401 | WSASetLastError(E_OUTOFMEMORY); | |
1402 | DEBUG_puts("5http_sspi_client: Decryption buffer too large (>256k)"); | |
1403 | return (-1); | |
1404 | } | |
1405 | ||
1406 | if ((temp = realloc(sspi->decryptBuffer, sspi->decryptBufferLength + 4096)) == NULL) | |
1407 | { | |
1408 | DEBUG_printf(("5http_sspi_client: Unable to allocate %d byte buffer.", sspi->decryptBufferLength + 4096)); | |
1409 | WSASetLastError(E_OUTOFMEMORY); | |
1410 | return (-1); | |
1411 | } | |
1412 | ||
1413 | sspi->decryptBufferLength += 4096; | |
1414 | sspi->decryptBuffer = temp; | |
1415 | } | |
1416 | ||
1417 | cbData = recv(http->fd, sspi->decryptBuffer + sspi->decryptBufferUsed, (int)(sspi->decryptBufferLength - sspi->decryptBufferUsed), 0); | |
1418 | ||
1419 | if (cbData < 0) | |
1420 | { | |
1421 | DEBUG_printf(("5http_sspi_client: recv failed: %d", WSAGetLastError())); | |
1422 | return (-1); | |
1423 | } | |
1424 | else if (cbData == 0) | |
1425 | { | |
1426 | DEBUG_printf(("5http_sspi_client: Server unexpectedly disconnected.")); | |
1427 | return (-1); | |
1428 | } | |
1429 | ||
1430 | DEBUG_printf(("5http_sspi_client: %d bytes of handshake data received", cbData)); | |
1431 | ||
1432 | sspi->decryptBufferUsed += cbData; | |
1433 | } | |
1434 | ||
1435 | /* | |
1436 | * Set up the input buffers. Buffer 0 is used to pass in data received from | |
1437 | * the server. Schannel will consume some or all of this. Leftover data | |
1438 | * (if any) will be placed in buffer 1 and given a buffer type of | |
1439 | * SECBUFFER_EXTRA. | |
1440 | */ | |
1441 | ||
1442 | inBuffers[0].pvBuffer = sspi->decryptBuffer; | |
1443 | inBuffers[0].cbBuffer = (unsigned long)sspi->decryptBufferUsed; | |
1444 | inBuffers[0].BufferType = SECBUFFER_TOKEN; | |
1445 | ||
1446 | inBuffers[1].pvBuffer = NULL; | |
1447 | inBuffers[1].cbBuffer = 0; | |
1448 | inBuffers[1].BufferType = SECBUFFER_EMPTY; | |
1449 | ||
1450 | inBuffer.cBuffers = 2; | |
1451 | inBuffer.pBuffers = inBuffers; | |
1452 | inBuffer.ulVersion = SECBUFFER_VERSION; | |
1453 | ||
1454 | /* | |
1455 | * Set up the output buffers. These are initialized to NULL so as to make it | |
1456 | * less likely we'll attempt to free random garbage later. | |
1457 | */ | |
1458 | ||
1459 | outBuffers[0].pvBuffer = NULL; | |
1460 | outBuffers[0].BufferType = SECBUFFER_TOKEN; | |
1461 | outBuffers[0].cbBuffer = 0; | |
1462 | ||
1463 | outBuffer.cBuffers = 1; | |
1464 | outBuffer.pBuffers = outBuffers; | |
1465 | outBuffer.ulVersion = SECBUFFER_VERSION; | |
1466 | ||
1467 | /* | |
1468 | * Call InitializeSecurityContext. | |
1469 | */ | |
1470 | ||
1471 | scRet = InitializeSecurityContext(&sspi->creds, &sspi->context, NULL, dwSSPIFlags, 0, SECURITY_NATIVE_DREP, &inBuffer, 0, NULL, &outBuffer, &dwSSPIOutFlags, &tsExpiry); | |
1472 | ||
1473 | /* | |
1474 | * If InitializeSecurityContext was successful (or if the error was one of | |
1475 | * the special extended ones), send the contents of the output buffer to the | |
1476 | * server. | |
1477 | */ | |
1478 | ||
1479 | if (scRet == SEC_E_OK || | |
1480 | scRet == SEC_I_CONTINUE_NEEDED || | |
1481 | FAILED(scRet) && (dwSSPIOutFlags & ISC_RET_EXTENDED_ERROR)) | |
1482 | { | |
1483 | if (outBuffers[0].cbBuffer && outBuffers[0].pvBuffer) | |
1484 | { | |
1485 | cbData = send(http->fd, outBuffers[0].pvBuffer, outBuffers[0].cbBuffer, 0); | |
1486 | ||
1487 | if (cbData <= 0) | |
1488 | { | |
1489 | DEBUG_printf(("5http_sspi_client: send failed: %d", WSAGetLastError())); | |
1490 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1491 | DeleteSecurityContext(&sspi->context); | |
1492 | return (-1); | |
1493 | } | |
1494 | ||
1495 | DEBUG_printf(("5http_sspi_client: %d bytes of handshake data sent.", cbData)); | |
1496 | ||
1497 | /* | |
1498 | * Free output buffer. | |
1499 | */ | |
1500 | ||
1501 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1502 | outBuffers[0].pvBuffer = NULL; | |
1503 | } | |
1504 | } | |
1505 | ||
1506 | /* | |
1507 | * If InitializeSecurityContext returned SEC_E_INCOMPLETE_MESSAGE, then we | |
1508 | * need to read more data from the server and try again. | |
1509 | */ | |
1510 | ||
1511 | if (scRet == SEC_E_INCOMPLETE_MESSAGE) | |
1512 | continue; | |
1513 | ||
1514 | /* | |
1515 | * If InitializeSecurityContext returned SEC_E_OK, then the handshake | |
1516 | * completed successfully. | |
1517 | */ | |
1518 | ||
1519 | if (scRet == SEC_E_OK) | |
1520 | { | |
1521 | /* | |
1522 | * If the "extra" buffer contains data, this is encrypted application | |
1523 | * protocol layer stuff. It needs to be saved. The application layer will | |
1524 | * later decrypt it with DecryptMessage. | |
1525 | */ | |
1526 | ||
1527 | DEBUG_puts("5http_sspi_client: Handshake was successful."); | |
1528 | ||
1529 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
1530 | { | |
1531 | memmove(sspi->decryptBuffer, sspi->decryptBuffer + sspi->decryptBufferUsed - inBuffers[1].cbBuffer, inBuffers[1].cbBuffer); | |
1532 | ||
1533 | sspi->decryptBufferUsed = inBuffers[1].cbBuffer; | |
1534 | ||
1535 | DEBUG_printf(("5http_sspi_client: %d bytes of app data was bundled with handshake data", sspi->decryptBufferUsed)); | |
1536 | } | |
1537 | else | |
1538 | sspi->decryptBufferUsed = 0; | |
1539 | ||
1540 | /* | |
1541 | * Bail out to quit | |
1542 | */ | |
1543 | ||
1544 | break; | |
1545 | } | |
1546 | ||
1547 | /* | |
1548 | * Check for fatal error. | |
1549 | */ | |
1550 | ||
1551 | if (FAILED(scRet)) | |
1552 | { | |
1553 | DEBUG_printf(("5http_sspi_client: InitializeSecurityContext(2) failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1554 | ret = -1; | |
1555 | break; | |
1556 | } | |
1557 | ||
1558 | /* | |
1559 | * If InitializeSecurityContext returned SEC_I_INCOMPLETE_CREDENTIALS, | |
1560 | * then the server just requested client authentication. | |
1561 | */ | |
1562 | ||
1563 | if (scRet == SEC_I_INCOMPLETE_CREDENTIALS) | |
1564 | { | |
1565 | /* | |
1566 | * Unimplemented | |
1567 | */ | |
1568 | ||
1569 | DEBUG_printf(("5http_sspi_client: server requested client credentials.")); | |
1570 | ret = -1; | |
1571 | break; | |
1572 | } | |
1573 | ||
1574 | /* | |
1575 | * Copy any leftover data from the "extra" buffer, and go around again. | |
1576 | */ | |
1577 | ||
1578 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
1579 | { | |
1580 | memmove(sspi->decryptBuffer, sspi->decryptBuffer + sspi->decryptBufferUsed - inBuffers[1].cbBuffer, inBuffers[1].cbBuffer); | |
1581 | ||
1582 | sspi->decryptBufferUsed = inBuffers[1].cbBuffer; | |
1583 | } | |
1584 | else | |
1585 | { | |
1586 | sspi->decryptBufferUsed = 0; | |
1587 | } | |
1588 | } | |
1589 | ||
1590 | if (!ret) | |
1591 | { | |
1592 | /* | |
1593 | * Success! Get the server cert | |
1594 | */ | |
1595 | ||
1596 | sspi->contextInitialized = TRUE; | |
1597 | ||
1598 | scRet = QueryContextAttributes(&sspi->context, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (VOID *)&(sspi->remoteCert)); | |
1599 | ||
1600 | if (scRet != SEC_E_OK) | |
1601 | { | |
1602 | DEBUG_printf(("5http_sspi_client: QueryContextAttributes failed(SECPKG_ATTR_REMOTE_CERT_CONTEXT): %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1603 | return (-1); | |
1604 | } | |
1605 | ||
1606 | /* | |
1607 | * Find out how big the header/trailer will be: | |
1608 | */ | |
1609 | ||
1610 | scRet = QueryContextAttributes(&sspi->context, SECPKG_ATTR_STREAM_SIZES, &sspi->streamSizes); | |
1611 | ||
1612 | if (scRet != SEC_E_OK) | |
1613 | { | |
1614 | DEBUG_printf(("5http_sspi_client: QueryContextAttributes failed(SECPKG_ATTR_STREAM_SIZES): %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1615 | ret = -1; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | return (ret); | |
1620 | } | |
1621 | ||
1622 | ||
1623 | /* | |
1624 | * 'http_sspi_create_credential()' - Create an SSPI certificate context. | |
1625 | */ | |
1626 | ||
1627 | static PCCERT_CONTEXT /* O - Certificate context */ | |
1628 | http_sspi_create_credential( | |
1629 | http_credential_t *cred) /* I - Credential */ | |
1630 | { | |
1631 | if (cred) | |
1632 | return (CertCreateCertificateContext(X509_ASN_ENCODING, cred->data, cred->datalen)); | |
1633 | else | |
1634 | return (NULL); | |
1635 | } | |
1636 | ||
1637 | ||
1638 | /* | |
1639 | * 'http_sspi_find_credentials()' - Retrieve a TLS certificate from the system store. | |
1640 | */ | |
1641 | ||
1642 | static BOOL /* O - 1 on success, 0 on failure */ | |
1643 | http_sspi_find_credentials( | |
1644 | http_t *http, /* I - HTTP connection */ | |
1645 | const LPWSTR container, /* I - Cert container name */ | |
1646 | const char *common_name) /* I - Common name of certificate */ | |
1647 | { | |
1648 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
1649 | HCERTSTORE store = NULL; /* Certificate store */ | |
1650 | PCCERT_CONTEXT storedContext = NULL; /* Context created from the store */ | |
1651 | DWORD dwSize = 0; /* 32 bit size */ | |
1652 | PBYTE p = NULL; /* Temporary storage */ | |
1653 | HCRYPTPROV hProv = (HCRYPTPROV)NULL; | |
1654 | /* Handle to a CSP */ | |
1655 | CERT_NAME_BLOB sib; /* Arbitrary array of bytes */ | |
1656 | SCHANNEL_CRED SchannelCred; /* Schannel credential data */ | |
1657 | TimeStamp tsExpiry; /* Time stamp */ | |
1658 | SECURITY_STATUS Status; /* Status */ | |
1659 | BOOL ok = TRUE; /* Return value */ | |
1660 | ||
1661 | ||
1662 | if (!CryptAcquireContextW(&hProv, (LPWSTR)container, MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET)) | |
1663 | { | |
1664 | if (GetLastError() == NTE_EXISTS) | |
1665 | { | |
1666 | if (!CryptAcquireContextW(&hProv, (LPWSTR)container, MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET)) | |
1667 | { | |
1668 | DEBUG_printf(("5http_sspi_find_credentials: CryptAcquireContext failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1669 | ok = FALSE; | |
1670 | goto cleanup; | |
1671 | } | |
1672 | } | |
1673 | } | |
1674 | ||
1675 | store = CertOpenStore(CERT_STORE_PROV_SYSTEM, X509_ASN_ENCODING|PKCS_7_ASN_ENCODING, hProv, CERT_SYSTEM_STORE_LOCAL_MACHINE | CERT_STORE_NO_CRYPT_RELEASE_FLAG | CERT_STORE_OPEN_EXISTING_FLAG, L"MY"); | |
1676 | ||
1677 | if (!store) | |
1678 | { | |
1679 | DEBUG_printf(("5http_sspi_find_credentials: CertOpenSystemStore failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1680 | ok = FALSE; | |
1681 | goto cleanup; | |
1682 | } | |
1683 | ||
1684 | dwSize = 0; | |
1685 | ||
1686 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, NULL, &dwSize, NULL)) | |
1687 | { | |
1688 | DEBUG_printf(("5http_sspi_find_credentials: CertStrToName failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1689 | ok = FALSE; | |
1690 | goto cleanup; | |
1691 | } | |
1692 | ||
1693 | p = (PBYTE)malloc(dwSize); | |
1694 | ||
1695 | if (!p) | |
1696 | { | |
1697 | DEBUG_printf(("5http_sspi_find_credentials: malloc failed for %d bytes.", dwSize)); | |
1698 | ok = FALSE; | |
1699 | goto cleanup; | |
1700 | } | |
1701 | ||
1702 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, p, &dwSize, NULL)) | |
1703 | { | |
1704 | DEBUG_printf(("5http_sspi_find_credentials: CertStrToName failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1705 | ok = FALSE; | |
1706 | goto cleanup; | |
1707 | } | |
1708 | ||
1709 | sib.cbData = dwSize; | |
1710 | sib.pbData = p; | |
1711 | ||
1712 | storedContext = CertFindCertificateInStore(store, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, 0, CERT_FIND_SUBJECT_NAME, &sib, NULL); | |
1713 | ||
1714 | if (!storedContext) | |
1715 | { | |
1716 | DEBUG_printf(("5http_sspi_find_credentials: Unable to find credentials for \"%s\".", common_name)); | |
1717 | ok = FALSE; | |
1718 | goto cleanup; | |
1719 | } | |
1720 | ||
1721 | ZeroMemory(&SchannelCred, sizeof(SchannelCred)); | |
1722 | ||
1723 | SchannelCred.dwVersion = SCHANNEL_CRED_VERSION; | |
1724 | SchannelCred.cCreds = 1; | |
1725 | SchannelCred.paCred = &storedContext; | |
1726 | ||
1727 | /* | |
1728 | * SSPI doesn't seem to like it if grbitEnabledProtocols is set for a client. | |
1729 | */ | |
1730 | ||
1731 | if (http->mode == _HTTP_MODE_SERVER) | |
1732 | SchannelCred.grbitEnabledProtocols = SP_PROT_SSL3TLS1; | |
1733 | ||
1734 | /* | |
1735 | * Create an SSPI credential. | |
1736 | */ | |
1737 | ||
1738 | Status = AcquireCredentialsHandle(NULL, UNISP_NAME, http->mode == _HTTP_MODE_SERVER ? SECPKG_CRED_INBOUND : SECPKG_CRED_OUTBOUND, NULL, &SchannelCred, NULL, NULL, &sspi->creds, &tsExpiry); | |
1739 | if (Status != SEC_E_OK) | |
1740 | { | |
1741 | DEBUG_printf(("5http_sspi_find_credentials: AcquireCredentialsHandle failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), Status))); | |
1742 | ok = FALSE; | |
1743 | goto cleanup; | |
1744 | } | |
1745 | ||
1746 | cleanup: | |
1747 | ||
1748 | /* | |
1749 | * Cleanup | |
1750 | */ | |
1751 | ||
1752 | if (storedContext) | |
1753 | CertFreeCertificateContext(storedContext); | |
1754 | ||
1755 | if (p) | |
1756 | free(p); | |
1757 | ||
1758 | if (store) | |
1759 | CertCloseStore(store, 0); | |
1760 | ||
1761 | if (hProv) | |
1762 | CryptReleaseContext(hProv, 0); | |
1763 | ||
1764 | return (ok); | |
1765 | } | |
1766 | ||
1767 | ||
1768 | /* | |
1769 | * 'http_sspi_free()' - Close a connection and free resources. | |
1770 | */ | |
1771 | ||
1772 | static void | |
1773 | http_sspi_free(_http_sspi_t *sspi) /* I - SSPI data */ | |
1774 | { | |
1775 | if (!sspi) | |
1776 | return; | |
1777 | ||
1778 | if (sspi->contextInitialized) | |
1779 | DeleteSecurityContext(&sspi->context); | |
1780 | ||
1781 | if (sspi->decryptBuffer) | |
1782 | free(sspi->decryptBuffer); | |
1783 | ||
1784 | if (sspi->readBuffer) | |
1785 | free(sspi->readBuffer); | |
1786 | ||
1787 | if (sspi->writeBuffer) | |
1788 | free(sspi->writeBuffer); | |
1789 | ||
1790 | if (sspi->localCert) | |
1791 | CertFreeCertificateContext(sspi->localCert); | |
1792 | ||
1793 | if (sspi->remoteCert) | |
1794 | CertFreeCertificateContext(sspi->remoteCert); | |
1795 | ||
1796 | free(sspi); | |
1797 | } | |
1798 | ||
1799 | ||
1800 | /* | |
1801 | * 'http_sspi_make_credentials()' - Create a TLS certificate in the system store. | |
1802 | */ | |
1803 | ||
1804 | static BOOL /* O - 1 on success, 0 on failure */ | |
1805 | http_sspi_make_credentials( | |
1806 | _http_sspi_t *sspi, /* I - SSPI data */ | |
1807 | const LPWSTR container, /* I - Cert container name */ | |
1808 | const char *common_name, /* I - Common name of certificate */ | |
1809 | _http_mode_t mode, /* I - Client or server? */ | |
1810 | int years) /* I - Years until expiration */ | |
1811 | { | |
1812 | HCERTSTORE store = NULL; /* Certificate store */ | |
1813 | PCCERT_CONTEXT storedContext = NULL; /* Context created from the store */ | |
1814 | PCCERT_CONTEXT createdContext = NULL; /* Context created by us */ | |
1815 | DWORD dwSize = 0; /* 32 bit size */ | |
1816 | PBYTE p = NULL; /* Temporary storage */ | |
1817 | HCRYPTPROV hProv = (HCRYPTPROV)NULL; | |
1818 | /* Handle to a CSP */ | |
1819 | CERT_NAME_BLOB sib; /* Arbitrary array of bytes */ | |
1820 | SCHANNEL_CRED SchannelCred; /* Schannel credential data */ | |
1821 | TimeStamp tsExpiry; /* Time stamp */ | |
1822 | SECURITY_STATUS Status; /* Status */ | |
1823 | HCRYPTKEY hKey = (HCRYPTKEY)NULL; /* Handle to crypto key */ | |
1824 | CRYPT_KEY_PROV_INFO kpi; /* Key container info */ | |
1825 | SYSTEMTIME et; /* System time */ | |
1826 | CERT_EXTENSIONS exts; /* Array of cert extensions */ | |
1827 | CRYPT_KEY_PROV_INFO ckp; /* Handle to crypto key */ | |
1828 | BOOL ok = TRUE; /* Return value */ | |
1829 | ||
1830 | ||
1831 | DEBUG_printf(("4http_sspi_make_credentials(sspi=%p, container=%p, common_name=\"%s\", mode=%d, years=%d)", sspi, container, common_name, mode, years)); | |
1832 | ||
1833 | if (!CryptAcquireContextW(&hProv, (LPWSTR)container, MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET)) | |
1834 | { | |
1835 | if (GetLastError() == NTE_EXISTS) | |
1836 | { | |
1837 | if (!CryptAcquireContextW(&hProv, (LPWSTR)container, MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET)) | |
1838 | { | |
1839 | DEBUG_printf(("5http_sspi_make_credentials: CryptAcquireContext failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1840 | ok = FALSE; | |
1841 | goto cleanup; | |
1842 | } | |
1843 | } | |
1844 | } | |
1845 | ||
1846 | store = CertOpenStore(CERT_STORE_PROV_SYSTEM, X509_ASN_ENCODING|PKCS_7_ASN_ENCODING, hProv, CERT_SYSTEM_STORE_LOCAL_MACHINE | CERT_STORE_NO_CRYPT_RELEASE_FLAG | CERT_STORE_OPEN_EXISTING_FLAG, L"MY"); | |
1847 | ||
1848 | if (!store) | |
1849 | { | |
1850 | DEBUG_printf(("5http_sspi_make_credentials: CertOpenSystemStore failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1851 | ok = FALSE; | |
1852 | goto cleanup; | |
1853 | } | |
1854 | ||
1855 | dwSize = 0; | |
1856 | ||
1857 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, NULL, &dwSize, NULL)) | |
1858 | { | |
1859 | DEBUG_printf(("5http_sspi_make_credentials: CertStrToName failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1860 | ok = FALSE; | |
1861 | goto cleanup; | |
1862 | } | |
1863 | ||
1864 | p = (PBYTE)malloc(dwSize); | |
1865 | ||
1866 | if (!p) | |
1867 | { | |
1868 | DEBUG_printf(("5http_sspi_make_credentials: malloc failed for %d bytes", dwSize)); | |
1869 | ok = FALSE; | |
1870 | goto cleanup; | |
1871 | } | |
1872 | ||
1873 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, p, &dwSize, NULL)) | |
1874 | { | |
1875 | DEBUG_printf(("5http_sspi_make_credentials: CertStrToName failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1876 | ok = FALSE; | |
1877 | goto cleanup; | |
1878 | } | |
1879 | ||
1880 | /* | |
1881 | * Create a private key and self-signed certificate... | |
1882 | */ | |
1883 | ||
1884 | if (!CryptGenKey(hProv, AT_KEYEXCHANGE, CRYPT_EXPORTABLE, &hKey)) | |
1885 | { | |
1886 | DEBUG_printf(("5http_sspi_make_credentials: CryptGenKey failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1887 | ok = FALSE; | |
1888 | goto cleanup; | |
1889 | } | |
1890 | ||
1891 | ZeroMemory(&kpi, sizeof(kpi)); | |
1892 | kpi.pwszContainerName = (LPWSTR)container; | |
1893 | kpi.pwszProvName = MS_DEF_PROV_W; | |
1894 | kpi.dwProvType = PROV_RSA_FULL; | |
1895 | kpi.dwFlags = CERT_SET_KEY_CONTEXT_PROP_ID; | |
1896 | kpi.dwKeySpec = AT_KEYEXCHANGE; | |
1897 | ||
1898 | GetSystemTime(&et); | |
1899 | et.wYear += years; | |
1900 | ||
1901 | ZeroMemory(&exts, sizeof(exts)); | |
1902 | ||
1903 | createdContext = CertCreateSelfSignCertificate(hProv, &sib, 0, &kpi, NULL, NULL, &et, &exts); | |
1904 | ||
1905 | if (!createdContext) | |
1906 | { | |
1907 | DEBUG_printf(("5http_sspi_make_credentials: CertCreateSelfSignCertificate failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1908 | ok = FALSE; | |
1909 | goto cleanup; | |
1910 | } | |
1911 | ||
1912 | /* | |
1913 | * Add the created context to the named store, and associate it with the named | |
1914 | * container... | |
1915 | */ | |
1916 | ||
1917 | if (!CertAddCertificateContextToStore(store, createdContext, CERT_STORE_ADD_REPLACE_EXISTING, &storedContext)) | |
1918 | { | |
1919 | DEBUG_printf(("5http_sspi_make_credentials: CertAddCertificateContextToStore failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1920 | ok = FALSE; | |
1921 | goto cleanup; | |
1922 | } | |
1923 | ||
1924 | ZeroMemory(&ckp, sizeof(ckp)); | |
1925 | ckp.pwszContainerName = (LPWSTR) container; | |
1926 | ckp.pwszProvName = MS_DEF_PROV_W; | |
1927 | ckp.dwProvType = PROV_RSA_FULL; | |
1928 | ckp.dwFlags = CRYPT_MACHINE_KEYSET; | |
1929 | ckp.dwKeySpec = AT_KEYEXCHANGE; | |
1930 | ||
1931 | if (!CertSetCertificateContextProperty(storedContext, CERT_KEY_PROV_INFO_PROP_ID, 0, &ckp)) | |
1932 | { | |
1933 | DEBUG_printf(("5http_sspi_make_credentials: CertSetCertificateContextProperty failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1934 | ok = FALSE; | |
1935 | goto cleanup; | |
1936 | } | |
1937 | ||
1938 | /* | |
1939 | * Get a handle to use the certificate... | |
1940 | */ | |
1941 | ||
1942 | ZeroMemory(&SchannelCred, sizeof(SchannelCred)); | |
1943 | ||
1944 | SchannelCred.dwVersion = SCHANNEL_CRED_VERSION; | |
1945 | SchannelCred.cCreds = 1; | |
1946 | SchannelCred.paCred = &storedContext; | |
1947 | ||
1948 | /* | |
1949 | * SSPI doesn't seem to like it if grbitEnabledProtocols is set for a client. | |
1950 | */ | |
1951 | ||
1952 | if (mode == _HTTP_MODE_SERVER) | |
1953 | SchannelCred.grbitEnabledProtocols = SP_PROT_SSL3TLS1; | |
1954 | ||
1955 | /* | |
1956 | * Create an SSPI credential. | |
1957 | */ | |
1958 | ||
1959 | Status = AcquireCredentialsHandle(NULL, UNISP_NAME, mode == _HTTP_MODE_SERVER ? SECPKG_CRED_INBOUND : SECPKG_CRED_OUTBOUND, NULL, &SchannelCred, NULL, NULL, &sspi->creds, &tsExpiry); | |
1960 | if (Status != SEC_E_OK) | |
1961 | { | |
1962 | DEBUG_printf(("5http_sspi_make_credentials: AcquireCredentialsHandle failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), Status))); | |
1963 | ok = FALSE; | |
1964 | goto cleanup; | |
1965 | } | |
1966 | ||
1967 | cleanup: | |
1968 | ||
1969 | /* | |
1970 | * Cleanup | |
1971 | */ | |
1972 | ||
1973 | if (hKey) | |
1974 | CryptDestroyKey(hKey); | |
1975 | ||
1976 | if (createdContext) | |
1977 | CertFreeCertificateContext(createdContext); | |
1978 | ||
1979 | if (storedContext) | |
1980 | CertFreeCertificateContext(storedContext); | |
1981 | ||
1982 | if (p) | |
1983 | free(p); | |
1984 | ||
1985 | if (store) | |
1986 | CertCloseStore(store, 0); | |
1987 | ||
1988 | if (hProv) | |
1989 | CryptReleaseContext(hProv, 0); | |
1990 | ||
1991 | return (ok); | |
1992 | } | |
1993 | ||
1994 | ||
1995 | /* | |
1996 | * 'http_sspi_server()' - Negotiate a TLS connection as a server. | |
1997 | */ | |
1998 | ||
1999 | static int /* O - 0 on success, -1 on failure */ | |
2000 | http_sspi_server(http_t *http, /* I - HTTP connection */ | |
2001 | const char *hostname) /* I - Hostname of server */ | |
2002 | { | |
2003 | _http_sspi_t *sspi = http->tls; /* I - SSPI data */ | |
2004 | char common_name[512]; /* Common name for cert */ | |
2005 | DWORD dwSSPIFlags; /* SSL connection attributes we want */ | |
2006 | DWORD dwSSPIOutFlags; /* SSL connection attributes we got */ | |
2007 | TimeStamp tsExpiry; /* Time stamp */ | |
2008 | SECURITY_STATUS scRet; /* SSPI Status */ | |
2009 | SecBufferDesc inBuffer; /* Array of SecBuffer structs */ | |
2010 | SecBuffer inBuffers[2]; /* Security package buffer */ | |
2011 | SecBufferDesc outBuffer; /* Array of SecBuffer structs */ | |
2012 | SecBuffer outBuffers[1]; /* Security package buffer */ | |
2013 | int num = 0; /* 32 bit status value */ | |
2014 | BOOL fInitContext = TRUE; /* Has the context been init'd? */ | |
2015 | int ret = 0; /* Return value */ | |
2016 | ||
2017 | ||
2018 | DEBUG_printf(("4http_sspi_server(http=%p, hostname=\"%s\")", http, hostname)); | |
2019 | ||
2020 | dwSSPIFlags = ASC_REQ_SEQUENCE_DETECT | | |
2021 | ASC_REQ_REPLAY_DETECT | | |
2022 | ASC_REQ_CONFIDENTIALITY | | |
2023 | ASC_REQ_EXTENDED_ERROR | | |
2024 | ASC_REQ_ALLOCATE_MEMORY | | |
2025 | ASC_REQ_STREAM; | |
2026 | ||
2027 | sspi->decryptBufferUsed = 0; | |
2028 | ||
2029 | /* | |
2030 | * Lookup the server certificate... | |
2031 | */ | |
2032 | ||
2033 | snprintf(common_name, sizeof(common_name), "CN=%s", hostname); | |
2034 | ||
2035 | if (!http_sspi_find_credentials(http, L"ServerContainer", common_name)) | |
2036 | if (!http_sspi_make_credentials(http->tls, L"ServerContainer", common_name, _HTTP_MODE_SERVER, 10)) | |
2037 | { | |
2038 | DEBUG_puts("5http_sspi_server: Unable to get server credentials."); | |
2039 | return (-1); | |
2040 | } | |
2041 | ||
2042 | /* | |
2043 | * Set OutBuffer for AcceptSecurityContext call | |
2044 | */ | |
2045 | ||
2046 | outBuffer.cBuffers = 1; | |
2047 | outBuffer.pBuffers = outBuffers; | |
2048 | outBuffer.ulVersion = SECBUFFER_VERSION; | |
2049 | ||
2050 | scRet = SEC_I_CONTINUE_NEEDED; | |
2051 | ||
2052 | while (scRet == SEC_I_CONTINUE_NEEDED || | |
2053 | scRet == SEC_E_INCOMPLETE_MESSAGE || | |
2054 | scRet == SEC_I_INCOMPLETE_CREDENTIALS) | |
2055 | { | |
2056 | if (sspi->decryptBufferUsed == 0 || scRet == SEC_E_INCOMPLETE_MESSAGE) | |
2057 | { | |
2058 | if (sspi->decryptBufferLength <= sspi->decryptBufferUsed) | |
2059 | { | |
2060 | BYTE *temp; /* New buffer */ | |
2061 | ||
2062 | if (sspi->decryptBufferLength >= 262144) | |
2063 | { | |
2064 | WSASetLastError(E_OUTOFMEMORY); | |
2065 | DEBUG_puts("5http_sspi_server: Decryption buffer too large (>256k)"); | |
2066 | return (-1); | |
2067 | } | |
2068 | ||
2069 | if ((temp = realloc(sspi->decryptBuffer, sspi->decryptBufferLength + 4096)) == NULL) | |
2070 | { | |
2071 | DEBUG_printf(("5http_sspi_server: Unable to allocate %d byte buffer.", sspi->decryptBufferLength + 4096)); | |
2072 | WSASetLastError(E_OUTOFMEMORY); | |
2073 | return (-1); | |
2074 | } | |
2075 | ||
2076 | sspi->decryptBufferLength += 4096; | |
2077 | sspi->decryptBuffer = temp; | |
2078 | } | |
2079 | ||
2080 | for (;;) | |
2081 | { | |
2082 | num = recv(http->fd, sspi->decryptBuffer + sspi->decryptBufferUsed, (int)(sspi->decryptBufferLength - sspi->decryptBufferUsed), 0); | |
2083 | ||
2084 | if (num == -1 && WSAGetLastError() == WSAEWOULDBLOCK) | |
2085 | Sleep(1); | |
2086 | else | |
2087 | break; | |
2088 | } | |
2089 | ||
2090 | if (num < 0) | |
2091 | { | |
2092 | DEBUG_printf(("5http_sspi_server: recv failed: %d", WSAGetLastError())); | |
2093 | return (-1); | |
2094 | } | |
2095 | else if (num == 0) | |
2096 | { | |
2097 | DEBUG_puts("5http_sspi_server: client disconnected"); | |
2098 | return (-1); | |
2099 | } | |
2100 | ||
2101 | DEBUG_printf(("5http_sspi_server: received %d (handshake) bytes from client.", num)); | |
2102 | sspi->decryptBufferUsed += num; | |
2103 | } | |
2104 | ||
2105 | /* | |
2106 | * InBuffers[1] is for getting extra data that SSPI/SCHANNEL doesn't process | |
2107 | * on this run around the loop. | |
2108 | */ | |
2109 | ||
2110 | inBuffers[0].pvBuffer = sspi->decryptBuffer; | |
2111 | inBuffers[0].cbBuffer = (unsigned long)sspi->decryptBufferUsed; | |
2112 | inBuffers[0].BufferType = SECBUFFER_TOKEN; | |
2113 | ||
2114 | inBuffers[1].pvBuffer = NULL; | |
2115 | inBuffers[1].cbBuffer = 0; | |
2116 | inBuffers[1].BufferType = SECBUFFER_EMPTY; | |
2117 | ||
2118 | inBuffer.cBuffers = 2; | |
2119 | inBuffer.pBuffers = inBuffers; | |
2120 | inBuffer.ulVersion = SECBUFFER_VERSION; | |
2121 | ||
2122 | /* | |
2123 | * Initialize these so if we fail, pvBuffer contains NULL, so we don't try to | |
2124 | * free random garbage at the quit. | |
2125 | */ | |
2126 | ||
2127 | outBuffers[0].pvBuffer = NULL; | |
2128 | outBuffers[0].BufferType = SECBUFFER_TOKEN; | |
2129 | outBuffers[0].cbBuffer = 0; | |
2130 | ||
2131 | scRet = AcceptSecurityContext(&sspi->creds, (fInitContext?NULL:&sspi->context), &inBuffer, dwSSPIFlags, SECURITY_NATIVE_DREP, (fInitContext?&sspi->context:NULL), &outBuffer, &dwSSPIOutFlags, &tsExpiry); | |
2132 | ||
2133 | fInitContext = FALSE; | |
2134 | ||
2135 | if (scRet == SEC_E_OK || | |
2136 | scRet == SEC_I_CONTINUE_NEEDED || | |
2137 | (FAILED(scRet) && ((dwSSPIOutFlags & ISC_RET_EXTENDED_ERROR) != 0))) | |
2138 | { | |
2139 | if (outBuffers[0].cbBuffer && outBuffers[0].pvBuffer) | |
2140 | { | |
2141 | /* | |
2142 | * Send response to server if there is one. | |
2143 | */ | |
2144 | ||
2145 | num = send(http->fd, outBuffers[0].pvBuffer, outBuffers[0].cbBuffer, 0); | |
2146 | ||
2147 | if (num <= 0) | |
2148 | { | |
2149 | DEBUG_printf(("5http_sspi_server: handshake send failed: %d", WSAGetLastError())); | |
2150 | return (-1); | |
2151 | } | |
2152 | ||
2153 | DEBUG_printf(("5http_sspi_server: sent %d handshake bytes to client.", outBuffers[0].cbBuffer)); | |
2154 | ||
2155 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
2156 | outBuffers[0].pvBuffer = NULL; | |
2157 | } | |
2158 | } | |
2159 | ||
2160 | if (scRet == SEC_E_OK) | |
2161 | { | |
2162 | /* | |
2163 | * If there's extra data then save it for next time we go to decrypt. | |
2164 | */ | |
2165 | ||
2166 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
2167 | { | |
2168 | memcpy(sspi->decryptBuffer, (LPBYTE)(sspi->decryptBuffer + sspi->decryptBufferUsed - inBuffers[1].cbBuffer), inBuffers[1].cbBuffer); | |
2169 | sspi->decryptBufferUsed = inBuffers[1].cbBuffer; | |
2170 | } | |
2171 | else | |
2172 | { | |
2173 | sspi->decryptBufferUsed = 0; | |
2174 | } | |
2175 | break; | |
2176 | } | |
2177 | else if (FAILED(scRet) && scRet != SEC_E_INCOMPLETE_MESSAGE) | |
2178 | { | |
2179 | DEBUG_printf(("5http_sspi_server: AcceptSecurityContext failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
2180 | ret = -1; | |
2181 | break; | |
2182 | } | |
2183 | ||
2184 | if (scRet != SEC_E_INCOMPLETE_MESSAGE && | |
2185 | scRet != SEC_I_INCOMPLETE_CREDENTIALS) | |
2186 | { | |
2187 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
2188 | { | |
2189 | memcpy(sspi->decryptBuffer, (LPBYTE)(sspi->decryptBuffer + sspi->decryptBufferUsed - inBuffers[1].cbBuffer), inBuffers[1].cbBuffer); | |
2190 | sspi->decryptBufferUsed = inBuffers[1].cbBuffer; | |
2191 | } | |
2192 | else | |
2193 | { | |
2194 | sspi->decryptBufferUsed = 0; | |
2195 | } | |
2196 | } | |
2197 | } | |
2198 | ||
2199 | if (!ret) | |
2200 | { | |
2201 | sspi->contextInitialized = TRUE; | |
2202 | ||
2203 | /* | |
2204 | * Find out how big the header will be: | |
2205 | */ | |
2206 | ||
2207 | scRet = QueryContextAttributes(&sspi->context, SECPKG_ATTR_STREAM_SIZES, &sspi->streamSizes); | |
2208 | ||
2209 | if (scRet != SEC_E_OK) | |
2210 | { | |
2211 | DEBUG_printf(("5http_sspi_server: QueryContextAttributes failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
2212 | ret = -1; | |
2213 | } | |
2214 | } | |
2215 | ||
2216 | return (ret); | |
2217 | } | |
2218 | ||
2219 | ||
2220 | /* | |
2221 | * 'http_sspi_strerror()' - Return a string for the specified error code. | |
2222 | */ | |
2223 | ||
2224 | static const char * /* O - String for error */ | |
2225 | http_sspi_strerror(char *buffer, /* I - Error message buffer */ | |
2226 | size_t bufsize, /* I - Size of buffer */ | |
2227 | DWORD code) /* I - Error code */ | |
2228 | { | |
2229 | if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, code, 0, buffer, bufsize, NULL)) | |
2230 | { | |
2231 | /* | |
2232 | * Strip trailing CR + LF... | |
2233 | */ | |
2234 | ||
2235 | char *ptr; /* Pointer into error message */ | |
2236 | ||
2237 | for (ptr = buffer + strlen(buffer) - 1; ptr >= buffer; ptr --) | |
2238 | if (*ptr == '\n' || *ptr == '\r') | |
2239 | *ptr = '\0'; | |
2240 | else | |
2241 | break; | |
2242 | } | |
2243 | else | |
2244 | snprintf(buffer, bufsize, "Unknown error %x", code); | |
2245 | ||
2246 | return (buffer); | |
2247 | } | |
2248 | ||
2249 | ||
2250 | /* | |
2251 | * 'http_sspi_verify()' - Verify a certificate. | |
2252 | */ | |
2253 | ||
2254 | static DWORD /* O - Error code (0 == No error) */ | |
2255 | http_sspi_verify( | |
2256 | PCCERT_CONTEXT cert, /* I - Server certificate */ | |
2257 | const char *common_name, /* I - Common name */ | |
2258 | DWORD dwCertFlags) /* I - Verification flags */ | |
2259 | { | |
2260 | HTTPSPolicyCallbackData httpsPolicy; /* HTTPS Policy Struct */ | |
2261 | CERT_CHAIN_POLICY_PARA policyPara; /* Cert chain policy parameters */ | |
2262 | CERT_CHAIN_POLICY_STATUS policyStatus;/* Cert chain policy status */ | |
2263 | CERT_CHAIN_PARA chainPara; /* Used for searching and matching criteria */ | |
2264 | PCCERT_CHAIN_CONTEXT chainContext = NULL; | |
2265 | /* Certificate chain */ | |
2266 | PWSTR commonNameUnicode = NULL; | |
2267 | /* Unicode common name */ | |
2268 | LPSTR rgszUsages[] = { szOID_PKIX_KP_SERVER_AUTH, | |
2269 | szOID_SERVER_GATED_CRYPTO, | |
2270 | szOID_SGC_NETSCAPE }; | |
2271 | /* How are we using this certificate? */ | |
2272 | DWORD cUsages = sizeof(rgszUsages) / sizeof(LPSTR); | |
2273 | /* Number of ites in rgszUsages */ | |
2274 | DWORD count; /* 32 bit count variable */ | |
2275 | DWORD status; /* Return value */ | |
2276 | #ifdef DEBUG | |
2277 | char error[1024]; /* Error message string */ | |
2278 | #endif /* DEBUG */ | |
2279 | ||
2280 | ||
2281 | if (!cert) | |
2282 | return (SEC_E_WRONG_PRINCIPAL); | |
2283 | ||
2284 | /* | |
2285 | * Convert common name to Unicode. | |
2286 | */ | |
2287 | ||
2288 | if (!common_name || !*common_name) | |
2289 | return (SEC_E_WRONG_PRINCIPAL); | |
2290 | ||
2291 | count = MultiByteToWideChar(CP_ACP, 0, common_name, -1, NULL, 0); | |
2292 | commonNameUnicode = LocalAlloc(LMEM_FIXED, count * sizeof(WCHAR)); | |
2293 | if (!commonNameUnicode) | |
2294 | return (SEC_E_INSUFFICIENT_MEMORY); | |
2295 | ||
2296 | if (!MultiByteToWideChar(CP_ACP, 0, common_name, -1, commonNameUnicode, count)) | |
2297 | { | |
2298 | LocalFree(commonNameUnicode); | |
2299 | return (SEC_E_WRONG_PRINCIPAL); | |
2300 | } | |
2301 | ||
2302 | /* | |
2303 | * Build certificate chain. | |
2304 | */ | |
2305 | ||
2306 | ZeroMemory(&chainPara, sizeof(chainPara)); | |
2307 | ||
2308 | chainPara.cbSize = sizeof(chainPara); | |
2309 | chainPara.RequestedUsage.dwType = USAGE_MATCH_TYPE_OR; | |
2310 | chainPara.RequestedUsage.Usage.cUsageIdentifier = cUsages; | |
2311 | chainPara.RequestedUsage.Usage.rgpszUsageIdentifier = rgszUsages; | |
2312 | ||
2313 | if (!CertGetCertificateChain(NULL, cert, NULL, cert->hCertStore, &chainPara, 0, NULL, &chainContext)) | |
2314 | { | |
2315 | status = GetLastError(); | |
2316 | ||
2317 | DEBUG_printf(("CertGetCertificateChain returned: %s", http_sspi_strerror(error, sizeof(error), status))); | |
2318 | ||
2319 | LocalFree(commonNameUnicode); | |
2320 | return (status); | |
2321 | } | |
2322 | ||
2323 | /* | |
2324 | * Validate certificate chain. | |
2325 | */ | |
2326 | ||
2327 | ZeroMemory(&httpsPolicy, sizeof(HTTPSPolicyCallbackData)); | |
2328 | httpsPolicy.cbStruct = sizeof(HTTPSPolicyCallbackData); | |
2329 | httpsPolicy.dwAuthType = AUTHTYPE_SERVER; | |
2330 | httpsPolicy.fdwChecks = dwCertFlags; | |
2331 | httpsPolicy.pwszServerName = commonNameUnicode; | |
2332 | ||
2333 | memset(&policyPara, 0, sizeof(policyPara)); | |
2334 | policyPara.cbSize = sizeof(policyPara); | |
2335 | policyPara.pvExtraPolicyPara = &httpsPolicy; | |
2336 | ||
2337 | memset(&policyStatus, 0, sizeof(policyStatus)); | |
2338 | policyStatus.cbSize = sizeof(policyStatus); | |
2339 | ||
2340 | if (!CertVerifyCertificateChainPolicy(CERT_CHAIN_POLICY_SSL, chainContext, &policyPara, &policyStatus)) | |
2341 | { | |
2342 | status = GetLastError(); | |
2343 | ||
2344 | DEBUG_printf(("CertVerifyCertificateChainPolicy returned %s", http_sspi_strerror(error, sizeof(error), status))); | |
2345 | } | |
2346 | else if (policyStatus.dwError) | |
2347 | status = policyStatus.dwError; | |
2348 | else | |
2349 | status = SEC_E_OK; | |
2350 | ||
2351 | if (chainContext) | |
2352 | CertFreeCertificateChain(chainContext); | |
2353 | ||
2354 | if (commonNameUnicode) | |
2355 | LocalFree(commonNameUnicode); | |
2356 | ||
2357 | return (status); | |
2358 | } | |
2359 | ||
2360 | ||
2361 | /* | |
2362 | * End of "$Id: tls-sspi.c 12047 2014-07-18 13:53:34Z msweet $". | |
2363 | */ |