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1 | /* | |
2 | * TLS support for CUPS on Windows using the Security Support Provider | |
3 | * Interface (SSPI). | |
4 | * | |
5 | * Copyright 2010-2015 by Apple Inc. | |
6 | * | |
7 | * These coded instructions, statements, and computer programs are the | |
8 | * property of Apple Inc. and are protected by Federal copyright | |
9 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
10 | * which should have been included with this file. If this file is | |
11 | * missing or damaged, see the license at "http://www.cups.org/". | |
12 | * | |
13 | * This file is subject to the Apple OS-Developed Software exception. | |
14 | */ | |
15 | ||
16 | /**** This file is included from tls.c ****/ | |
17 | ||
18 | /* | |
19 | * Include necessary headers... | |
20 | */ | |
21 | ||
22 | #include "debug-private.h" | |
23 | ||
24 | ||
25 | /* | |
26 | * Include necessary libraries... | |
27 | */ | |
28 | ||
29 | #pragma comment(lib, "Crypt32.lib") | |
30 | #pragma comment(lib, "Secur32.lib") | |
31 | #pragma comment(lib, "Ws2_32.lib") | |
32 | ||
33 | ||
34 | /* | |
35 | * Constants... | |
36 | */ | |
37 | ||
38 | #ifndef SECURITY_FLAG_IGNORE_UNKNOWN_CA | |
39 | # define SECURITY_FLAG_IGNORE_UNKNOWN_CA 0x00000100 /* Untrusted root */ | |
40 | #endif /* SECURITY_FLAG_IGNORE_UNKNOWN_CA */ | |
41 | ||
42 | #ifndef SECURITY_FLAG_IGNORE_CERT_CN_INVALID | |
43 | # define SECURITY_FLAG_IGNORE_CERT_CN_INVALID 0x00001000 /* Common name does not match */ | |
44 | #endif /* !SECURITY_FLAG_IGNORE_CERT_CN_INVALID */ | |
45 | ||
46 | #ifndef SECURITY_FLAG_IGNORE_CERT_DATE_INVALID | |
47 | # define SECURITY_FLAG_IGNORE_CERT_DATE_INVALID 0x00002000 /* Expired X509 Cert. */ | |
48 | #endif /* !SECURITY_FLAG_IGNORE_CERT_DATE_INVALID */ | |
49 | ||
50 | ||
51 | /* | |
52 | * Local globals... | |
53 | */ | |
54 | ||
55 | static int tls_options = -1;/* Options for TLS connections */ | |
56 | ||
57 | ||
58 | /* | |
59 | * Local functions... | |
60 | */ | |
61 | ||
62 | static _http_sspi_t *http_sspi_alloc(void); | |
63 | static int http_sspi_client(http_t *http, const char *hostname); | |
64 | static PCCERT_CONTEXT http_sspi_create_credential(http_credential_t *cred); | |
65 | static BOOL http_sspi_find_credentials(http_t *http, const LPWSTR containerName, const char *common_name); | |
66 | static void http_sspi_free(_http_sspi_t *sspi); | |
67 | static BOOL http_sspi_make_credentials(_http_sspi_t *sspi, const LPWSTR containerName, const char *common_name, _http_mode_t mode, int years); | |
68 | static int http_sspi_server(http_t *http, const char *hostname); | |
69 | static void http_sspi_set_allows_any_root(_http_sspi_t *sspi, BOOL allow); | |
70 | static void http_sspi_set_allows_expired_certs(_http_sspi_t *sspi, BOOL allow); | |
71 | static const char *http_sspi_strerror(char *buffer, size_t bufsize, DWORD code); | |
72 | static DWORD http_sspi_verify(PCCERT_CONTEXT cert, const char *common_name, DWORD dwCertFlags); | |
73 | ||
74 | ||
75 | /* | |
76 | * 'cupsMakeServerCredentials()' - Make a self-signed certificate and private key pair. | |
77 | * | |
78 | * @since CUPS 2.0/OS 10.10@ | |
79 | */ | |
80 | ||
81 | int /* O - 1 on success, 0 on failure */ | |
82 | cupsMakeServerCredentials( | |
83 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
84 | const char *common_name, /* I - Common name */ | |
85 | int num_alt_names, /* I - Number of subject alternate names */ | |
86 | const char **alt_names, /* I - Subject Alternate Names */ | |
87 | time_t expiration_date) /* I - Expiration date */ | |
88 | { | |
89 | _http_sspi_t *sspi; /* SSPI data */ | |
90 | int ret; /* Return value */ | |
91 | ||
92 | ||
93 | 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)); | |
94 | ||
95 | (void)path; | |
96 | (void)num_alt_names; | |
97 | (void)alt_names; | |
98 | ||
99 | sspi = http_sspi_alloc(); | |
100 | ret = http_sspi_make_credentials(sspi, L"ServerContainer", common_name, _HTTP_MODE_SERVER, (int)((expiration_date - time(NULL) + 86399) / 86400 / 365)); | |
101 | ||
102 | http_sspi_free(sspi); | |
103 | ||
104 | return (ret); | |
105 | } | |
106 | ||
107 | ||
108 | /* | |
109 | * 'cupsSetServerCredentials()' - Set the default server credentials. | |
110 | * | |
111 | * Note: The server credentials are used by all threads in the running process. | |
112 | * This function is threadsafe. | |
113 | * | |
114 | * @since CUPS 2.0/OS 10.10@ | |
115 | */ | |
116 | ||
117 | int /* O - 1 on success, 0 on failure */ | |
118 | cupsSetServerCredentials( | |
119 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
120 | const char *common_name, /* I - Default common name for server */ | |
121 | int auto_create) /* I - 1 = automatically create self-signed certificates */ | |
122 | { | |
123 | DEBUG_printf(("cupsSetServerCredentials(path=\"%s\", common_name=\"%s\", auto_create=%d)", path, common_name, auto_create)); | |
124 | ||
125 | (void)path; | |
126 | (void)common_name; | |
127 | (void)auto_create; | |
128 | ||
129 | return (0); | |
130 | } | |
131 | ||
132 | ||
133 | /* | |
134 | * 'httpCopyCredentials()' - Copy the credentials associated with the peer in | |
135 | * an encrypted connection. | |
136 | * | |
137 | * @since CUPS 1.5/macOS 10.7@ | |
138 | */ | |
139 | ||
140 | int /* O - Status of call (0 = success) */ | |
141 | httpCopyCredentials( | |
142 | http_t *http, /* I - Connection to server */ | |
143 | cups_array_t **credentials) /* O - Array of credentials */ | |
144 | { | |
145 | DEBUG_printf(("httpCopyCredentials(http=%p, credentials=%p)", http, credentials)); | |
146 | ||
147 | if (!http || !http->tls || !http->tls->remoteCert || !credentials) | |
148 | { | |
149 | if (credentials) | |
150 | *credentials = NULL; | |
151 | ||
152 | return (-1); | |
153 | } | |
154 | ||
155 | *credentials = cupsArrayNew(NULL, NULL); | |
156 | httpAddCredential(*credentials, http->tls->remoteCert->pbCertEncoded, http->tls->remoteCert->cbCertEncoded); | |
157 | ||
158 | return (0); | |
159 | } | |
160 | ||
161 | ||
162 | /* | |
163 | * '_httpCreateCredentials()' - Create credentials in the internal format. | |
164 | */ | |
165 | ||
166 | http_tls_credentials_t /* O - Internal credentials */ | |
167 | _httpCreateCredentials( | |
168 | cups_array_t *credentials) /* I - Array of credentials */ | |
169 | { | |
170 | return (http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials))); | |
171 | } | |
172 | ||
173 | ||
174 | /* | |
175 | * 'httpCredentialsAreValidForName()' - Return whether the credentials are valid for the given name. | |
176 | * | |
177 | * @since CUPS 2.0/OS 10.10@ | |
178 | */ | |
179 | ||
180 | int /* O - 1 if valid, 0 otherwise */ | |
181 | httpCredentialsAreValidForName( | |
182 | cups_array_t *credentials, /* I - Credentials */ | |
183 | const char *common_name) /* I - Name to check */ | |
184 | { | |
185 | int valid = 1; /* Valid name? */ | |
186 | PCCERT_CONTEXT cert = http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
187 | /* Certificate */ | |
188 | char cert_name[1024]; /* Name from certificate */ | |
189 | ||
190 | ||
191 | if (cert) | |
192 | { | |
193 | if (CertNameToStr(X509_ASN_ENCODING, &(cert->pCertInfo->Subject), CERT_SIMPLE_NAME_STR, cert_name, sizeof(cert_name))) | |
194 | { | |
195 | /* | |
196 | * Extract common name at end... | |
197 | */ | |
198 | ||
199 | char *ptr = strrchr(cert_name, ','); | |
200 | if (ptr && ptr[1]) | |
201 | _cups_strcpy(cert_name, ptr + 2); | |
202 | } | |
203 | else | |
204 | strlcpy(cert_name, "unknown", sizeof(cert_name)); | |
205 | ||
206 | CertFreeCertificateContext(cert); | |
207 | } | |
208 | else | |
209 | strlcpy(cert_name, "unknown", sizeof(cert_name)); | |
210 | ||
211 | /* | |
212 | * Compare the common names... | |
213 | */ | |
214 | ||
215 | if (_cups_strcasecmp(common_name, cert_name)) | |
216 | { | |
217 | /* | |
218 | * Not an exact match for the common name, check for wildcard certs... | |
219 | */ | |
220 | ||
221 | const char *domain = strchr(common_name, '.'); | |
222 | /* Domain in common name */ | |
223 | ||
224 | if (strncmp(cert_name, "*.", 2) || !domain || _cups_strcasecmp(domain, cert_name + 1)) | |
225 | { | |
226 | /* | |
227 | * Not a wildcard match. | |
228 | */ | |
229 | ||
230 | /* TODO: Check subject alternate names */ | |
231 | valid = 0; | |
232 | } | |
233 | } | |
234 | ||
235 | return (valid); | |
236 | } | |
237 | ||
238 | ||
239 | /* | |
240 | * 'httpCredentialsGetTrust()' - Return the trust of credentials. | |
241 | * | |
242 | * @since CUPS 2.0/OS 10.10@ | |
243 | */ | |
244 | ||
245 | http_trust_t /* O - Level of trust */ | |
246 | httpCredentialsGetTrust( | |
247 | cups_array_t *credentials, /* I - Credentials */ | |
248 | const char *common_name) /* I - Common name for trust lookup */ | |
249 | { | |
250 | http_trust_t trust = HTTP_TRUST_OK; /* Level of trust */ | |
251 | PCCERT_CONTEXT cert = NULL; /* Certificate to validate */ | |
252 | DWORD certFlags = 0; /* Cert verification flags */ | |
253 | _cups_globals_t *cg = _cupsGlobals(); /* Per-thread global data */ | |
254 | ||
255 | ||
256 | if (!common_name) | |
257 | return (HTTP_TRUST_UNKNOWN); | |
258 | ||
259 | cert = http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
260 | if (!cert) | |
261 | return (HTTP_TRUST_UNKNOWN); | |
262 | ||
263 | if (cg->any_root < 0) | |
264 | _cupsSetDefaults(); | |
265 | ||
266 | if (cg->any_root) | |
267 | certFlags |= SECURITY_FLAG_IGNORE_UNKNOWN_CA; | |
268 | ||
269 | if (cg->expired_certs) | |
270 | certFlags |= SECURITY_FLAG_IGNORE_CERT_DATE_INVALID; | |
271 | ||
272 | if (!cg->validate_certs) | |
273 | certFlags |= SECURITY_FLAG_IGNORE_CERT_CN_INVALID; | |
274 | ||
275 | if (http_sspi_verify(cert, common_name, certFlags) != SEC_E_OK) | |
276 | trust = HTTP_TRUST_INVALID; | |
277 | ||
278 | CertFreeCertificateContext(cert); | |
279 | ||
280 | return (trust); | |
281 | } | |
282 | ||
283 | ||
284 | /* | |
285 | * 'httpCredentialsGetExpiration()' - Return the expiration date of the credentials. | |
286 | * | |
287 | * @since CUPS 2.0/OS 10.10@ | |
288 | */ | |
289 | ||
290 | time_t /* O - Expiration date of credentials */ | |
291 | httpCredentialsGetExpiration( | |
292 | cups_array_t *credentials) /* I - Credentials */ | |
293 | { | |
294 | time_t expiration_date = 0; /* Expiration data of credentials */ | |
295 | PCCERT_CONTEXT cert = http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
296 | /* Certificate */ | |
297 | ||
298 | if (cert) | |
299 | { | |
300 | SYSTEMTIME systime; /* System time */ | |
301 | struct tm tm; /* UNIX date/time */ | |
302 | ||
303 | FileTimeToSystemTime(&(cert->pCertInfo->NotAfter), &systime); | |
304 | ||
305 | tm.tm_year = systime.wYear - 1900; | |
306 | tm.tm_mon = systime.wMonth - 1; | |
307 | tm.tm_mday = systime.wDay; | |
308 | tm.tm_hour = systime.wHour; | |
309 | tm.tm_min = systime.wMinute; | |
310 | tm.tm_sec = systime.wSecond; | |
311 | ||
312 | expiration_date = mktime(&tm); | |
313 | ||
314 | CertFreeCertificateContext(cert); | |
315 | } | |
316 | ||
317 | return (expiration_date); | |
318 | } | |
319 | ||
320 | ||
321 | /* | |
322 | * 'httpCredentialsString()' - Return a string representing the credentials. | |
323 | * | |
324 | * @since CUPS 2.0/OS 10.10@ | |
325 | */ | |
326 | ||
327 | size_t /* O - Total size of credentials string */ | |
328 | httpCredentialsString( | |
329 | cups_array_t *credentials, /* I - Credentials */ | |
330 | char *buffer, /* I - Buffer or @code NULL@ */ | |
331 | size_t bufsize) /* I - Size of buffer */ | |
332 | { | |
333 | http_credential_t *first = (http_credential_t *)cupsArrayFirst(credentials); | |
334 | /* First certificate */ | |
335 | PCCERT_CONTEXT cert; /* Certificate */ | |
336 | ||
337 | ||
338 | DEBUG_printf(("httpCredentialsString(credentials=%p, buffer=%p, bufsize=" CUPS_LLFMT ")", credentials, buffer, CUPS_LLCAST bufsize)); | |
339 | ||
340 | if (!buffer) | |
341 | return (0); | |
342 | ||
343 | if (buffer && bufsize > 0) | |
344 | *buffer = '\0'; | |
345 | ||
346 | cert = http_sspi_create_credential(first); | |
347 | ||
348 | if (cert) | |
349 | { | |
350 | char cert_name[256]; /* Common name */ | |
351 | SYSTEMTIME systime; /* System time */ | |
352 | struct tm tm; /* UNIX date/time */ | |
353 | time_t expiration; /* Expiration date of cert */ | |
354 | _cups_md5_state_t md5_state; /* MD5 state */ | |
355 | unsigned char md5_digest[16]; /* MD5 result */ | |
356 | ||
357 | FileTimeToSystemTime(&(cert->pCertInfo->NotAfter), &systime); | |
358 | ||
359 | tm.tm_year = systime.wYear - 1900; | |
360 | tm.tm_mon = systime.wMonth - 1; | |
361 | tm.tm_mday = systime.wDay; | |
362 | tm.tm_hour = systime.wHour; | |
363 | tm.tm_min = systime.wMinute; | |
364 | tm.tm_sec = systime.wSecond; | |
365 | ||
366 | expiration = mktime(&tm); | |
367 | ||
368 | if (CertNameToStr(X509_ASN_ENCODING, &(cert->pCertInfo->Subject), CERT_SIMPLE_NAME_STR, cert_name, sizeof(cert_name))) | |
369 | { | |
370 | /* | |
371 | * Extract common name at end... | |
372 | */ | |
373 | ||
374 | char *ptr = strrchr(cert_name, ','); | |
375 | if (ptr && ptr[1]) | |
376 | _cups_strcpy(cert_name, ptr + 2); | |
377 | } | |
378 | else | |
379 | strlcpy(cert_name, "unknown", sizeof(cert_name)); | |
380 | ||
381 | _cupsMD5Init(&md5_state); | |
382 | _cupsMD5Append(&md5_state, first->data, (int)first->datalen); | |
383 | _cupsMD5Finish(&md5_state, md5_digest); | |
384 | ||
385 | 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]); | |
386 | ||
387 | CertFreeCertificateContext(cert); | |
388 | } | |
389 | ||
390 | DEBUG_printf(("1httpCredentialsString: Returning \"%s\".", buffer)); | |
391 | ||
392 | return (strlen(buffer)); | |
393 | } | |
394 | ||
395 | ||
396 | /* | |
397 | * '_httpFreeCredentials()' - Free internal credentials. | |
398 | */ | |
399 | ||
400 | void | |
401 | _httpFreeCredentials( | |
402 | http_tls_credentials_t credentials) /* I - Internal credentials */ | |
403 | { | |
404 | if (!credentials) | |
405 | return; | |
406 | ||
407 | CertFreeCertificateContext(credentials); | |
408 | } | |
409 | ||
410 | ||
411 | /* | |
412 | * 'httpLoadCredentials()' - Load X.509 credentials from a keychain file. | |
413 | * | |
414 | * @since CUPS 2.0/OS 10.10@ | |
415 | */ | |
416 | ||
417 | int /* O - 0 on success, -1 on error */ | |
418 | httpLoadCredentials( | |
419 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
420 | cups_array_t **credentials, /* IO - Credentials */ | |
421 | const char *common_name) /* I - Common name for credentials */ | |
422 | { | |
423 | HCERTSTORE store = NULL; /* Certificate store */ | |
424 | PCCERT_CONTEXT storedContext = NULL; /* Context created from the store */ | |
425 | DWORD dwSize = 0; /* 32 bit size */ | |
426 | PBYTE p = NULL; /* Temporary storage */ | |
427 | HCRYPTPROV hProv = (HCRYPTPROV)NULL; | |
428 | /* Handle to a CSP */ | |
429 | CERT_NAME_BLOB sib; /* Arbitrary array of bytes */ | |
430 | #ifdef DEBUG | |
431 | char error[1024]; /* Error message buffer */ | |
432 | #endif /* DEBUG */ | |
433 | ||
434 | ||
435 | DEBUG_printf(("httpLoadCredentials(path=\"%s\", credentials=%p, common_name=\"%s\")", path, credentials, common_name)); | |
436 | ||
437 | (void)path; | |
438 | ||
439 | if (credentials) | |
440 | { | |
441 | *credentials = NULL; | |
442 | } | |
443 | else | |
444 | { | |
445 | DEBUG_puts("1httpLoadCredentials: NULL credentials pointer, returning -1."); | |
446 | return (-1); | |
447 | } | |
448 | ||
449 | if (!common_name) | |
450 | { | |
451 | DEBUG_puts("1httpLoadCredentials: Bad common name, returning -1."); | |
452 | return (-1); | |
453 | } | |
454 | ||
455 | if (!CryptAcquireContextW(&hProv, L"RememberedContainer", MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET)) | |
456 | { | |
457 | if (GetLastError() == NTE_EXISTS) | |
458 | { | |
459 | if (!CryptAcquireContextW(&hProv, L"RememberedContainer", MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET)) | |
460 | { | |
461 | DEBUG_printf(("1httpLoadCredentials: CryptAcquireContext failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
462 | goto cleanup; | |
463 | } | |
464 | } | |
465 | } | |
466 | ||
467 | 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"); | |
468 | ||
469 | if (!store) | |
470 | { | |
471 | DEBUG_printf(("1httpLoadCredentials: CertOpenSystemStore failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
472 | goto cleanup; | |
473 | } | |
474 | ||
475 | dwSize = 0; | |
476 | ||
477 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, NULL, &dwSize, NULL)) | |
478 | { | |
479 | DEBUG_printf(("1httpLoadCredentials: CertStrToName failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
480 | goto cleanup; | |
481 | } | |
482 | ||
483 | p = (PBYTE)malloc(dwSize); | |
484 | ||
485 | if (!p) | |
486 | { | |
487 | DEBUG_printf(("1httpLoadCredentials: malloc failed for %d bytes.", dwSize)); | |
488 | goto cleanup; | |
489 | } | |
490 | ||
491 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, p, &dwSize, NULL)) | |
492 | { | |
493 | DEBUG_printf(("1httpLoadCredentials: CertStrToName failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
494 | goto cleanup; | |
495 | } | |
496 | ||
497 | sib.cbData = dwSize; | |
498 | sib.pbData = p; | |
499 | ||
500 | storedContext = CertFindCertificateInStore(store, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, 0, CERT_FIND_SUBJECT_NAME, &sib, NULL); | |
501 | ||
502 | if (!storedContext) | |
503 | { | |
504 | DEBUG_printf(("1httpLoadCredentials: Unable to find credentials for \"%s\".", common_name)); | |
505 | goto cleanup; | |
506 | } | |
507 | ||
508 | *credentials = cupsArrayNew(NULL, NULL); | |
509 | httpAddCredential(*credentials, storedContext->pbCertEncoded, storedContext->cbCertEncoded); | |
510 | ||
511 | cleanup: | |
512 | ||
513 | /* | |
514 | * Cleanup | |
515 | */ | |
516 | ||
517 | if (storedContext) | |
518 | CertFreeCertificateContext(storedContext); | |
519 | ||
520 | if (p) | |
521 | free(p); | |
522 | ||
523 | if (store) | |
524 | CertCloseStore(store, 0); | |
525 | ||
526 | if (hProv) | |
527 | CryptReleaseContext(hProv, 0); | |
528 | ||
529 | DEBUG_printf(("1httpLoadCredentials: Returning %d.", *credentials ? 0 : -1)); | |
530 | ||
531 | return (*credentials ? 0 : -1); | |
532 | } | |
533 | ||
534 | ||
535 | /* | |
536 | * 'httpSaveCredentials()' - Save X.509 credentials to a keychain file. | |
537 | * | |
538 | * @since CUPS 2.0/OS 10.10@ | |
539 | */ | |
540 | ||
541 | int /* O - -1 on error, 0 on success */ | |
542 | httpSaveCredentials( | |
543 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
544 | cups_array_t *credentials, /* I - Credentials */ | |
545 | const char *common_name) /* I - Common name for credentials */ | |
546 | { | |
547 | HCERTSTORE store = NULL; /* Certificate store */ | |
548 | PCCERT_CONTEXT storedContext = NULL; /* Context created from the store */ | |
549 | PCCERT_CONTEXT createdContext = NULL; /* Context created by us */ | |
550 | DWORD dwSize = 0; /* 32 bit size */ | |
551 | PBYTE p = NULL; /* Temporary storage */ | |
552 | HCRYPTPROV hProv = (HCRYPTPROV)NULL; | |
553 | /* Handle to a CSP */ | |
554 | CRYPT_KEY_PROV_INFO ckp; /* Handle to crypto key */ | |
555 | int ret = -1; /* Return value */ | |
556 | #ifdef DEBUG | |
557 | char error[1024]; /* Error message buffer */ | |
558 | #endif /* DEBUG */ | |
559 | ||
560 | ||
561 | DEBUG_printf(("httpSaveCredentials(path=\"%s\", credentials=%p, common_name=\"%s\")", path, credentials, common_name)); | |
562 | ||
563 | (void)path; | |
564 | ||
565 | if (!common_name) | |
566 | { | |
567 | DEBUG_puts("1httpSaveCredentials: Bad common name, returning -1."); | |
568 | return (-1); | |
569 | } | |
570 | ||
571 | createdContext = http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
572 | if (!createdContext) | |
573 | { | |
574 | DEBUG_puts("1httpSaveCredentials: Bad credentials, returning -1."); | |
575 | return (-1); | |
576 | } | |
577 | ||
578 | if (!CryptAcquireContextW(&hProv, L"RememberedContainer", MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET)) | |
579 | { | |
580 | if (GetLastError() == NTE_EXISTS) | |
581 | { | |
582 | if (!CryptAcquireContextW(&hProv, L"RememberedContainer", MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET)) | |
583 | { | |
584 | DEBUG_printf(("1httpSaveCredentials: CryptAcquireContext failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
585 | goto cleanup; | |
586 | } | |
587 | } | |
588 | } | |
589 | ||
590 | 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"); | |
591 | ||
592 | if (!store) | |
593 | { | |
594 | DEBUG_printf(("1httpSaveCredentials: CertOpenSystemStore failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
595 | goto cleanup; | |
596 | } | |
597 | ||
598 | dwSize = 0; | |
599 | ||
600 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, NULL, &dwSize, NULL)) | |
601 | { | |
602 | DEBUG_printf(("1httpSaveCredentials: CertStrToName failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
603 | goto cleanup; | |
604 | } | |
605 | ||
606 | p = (PBYTE)malloc(dwSize); | |
607 | ||
608 | if (!p) | |
609 | { | |
610 | DEBUG_printf(("1httpSaveCredentials: malloc failed for %d bytes.", dwSize)); | |
611 | goto cleanup; | |
612 | } | |
613 | ||
614 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, p, &dwSize, NULL)) | |
615 | { | |
616 | DEBUG_printf(("1httpSaveCredentials: CertStrToName failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
617 | goto cleanup; | |
618 | } | |
619 | ||
620 | /* | |
621 | * Add the created context to the named store, and associate it with the named | |
622 | * container... | |
623 | */ | |
624 | ||
625 | if (!CertAddCertificateContextToStore(store, createdContext, CERT_STORE_ADD_REPLACE_EXISTING, &storedContext)) | |
626 | { | |
627 | DEBUG_printf(("1httpSaveCredentials: CertAddCertificateContextToStore failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
628 | goto cleanup; | |
629 | } | |
630 | ||
631 | ZeroMemory(&ckp, sizeof(ckp)); | |
632 | ckp.pwszContainerName = L"RememberedContainer"; | |
633 | ckp.pwszProvName = MS_DEF_PROV_W; | |
634 | ckp.dwProvType = PROV_RSA_FULL; | |
635 | ckp.dwFlags = CRYPT_MACHINE_KEYSET; | |
636 | ckp.dwKeySpec = AT_KEYEXCHANGE; | |
637 | ||
638 | if (!CertSetCertificateContextProperty(storedContext, CERT_KEY_PROV_INFO_PROP_ID, 0, &ckp)) | |
639 | { | |
640 | DEBUG_printf(("1httpSaveCredentials: CertSetCertificateContextProperty failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
641 | goto cleanup; | |
642 | } | |
643 | ||
644 | ret = 0; | |
645 | ||
646 | cleanup: | |
647 | ||
648 | /* | |
649 | * Cleanup | |
650 | */ | |
651 | ||
652 | if (createdContext) | |
653 | CertFreeCertificateContext(createdContext); | |
654 | ||
655 | if (storedContext) | |
656 | CertFreeCertificateContext(storedContext); | |
657 | ||
658 | if (p) | |
659 | free(p); | |
660 | ||
661 | if (store) | |
662 | CertCloseStore(store, 0); | |
663 | ||
664 | if (hProv) | |
665 | CryptReleaseContext(hProv, 0); | |
666 | ||
667 | DEBUG_printf(("1httpSaveCredentials: Returning %d.", ret)); | |
668 | return (ret); | |
669 | } | |
670 | ||
671 | ||
672 | /* | |
673 | * '_httpTLSInitialize()' - Initialize the TLS stack. | |
674 | */ | |
675 | ||
676 | void | |
677 | _httpTLSInitialize(void) | |
678 | { | |
679 | /* | |
680 | * Nothing to do... | |
681 | */ | |
682 | } | |
683 | ||
684 | ||
685 | /* | |
686 | * '_httpTLSPending()' - Return the number of pending TLS-encrypted bytes. | |
687 | */ | |
688 | ||
689 | size_t /* O - Bytes available */ | |
690 | _httpTLSPending(http_t *http) /* I - HTTP connection */ | |
691 | { | |
692 | if (http->tls) | |
693 | return (http->tls->readBufferUsed); | |
694 | else | |
695 | return (0); | |
696 | } | |
697 | ||
698 | ||
699 | /* | |
700 | * '_httpTLSRead()' - Read from a SSL/TLS connection. | |
701 | */ | |
702 | ||
703 | int /* O - Bytes read */ | |
704 | _httpTLSRead(http_t *http, /* I - HTTP connection */ | |
705 | char *buf, /* I - Buffer to store data */ | |
706 | int len) /* I - Length of buffer */ | |
707 | { | |
708 | int i; /* Looping var */ | |
709 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
710 | SecBufferDesc message; /* Array of SecBuffer struct */ | |
711 | SecBuffer buffers[4] = { 0 }; /* Security package buffer */ | |
712 | int num = 0; /* Return value */ | |
713 | PSecBuffer pDataBuffer; /* Data buffer */ | |
714 | PSecBuffer pExtraBuffer; /* Excess data buffer */ | |
715 | SECURITY_STATUS scRet; /* SSPI status */ | |
716 | ||
717 | ||
718 | DEBUG_printf(("4_httpTLSRead(http=%p, buf=%p, len=%d)", http, buf, len)); | |
719 | ||
720 | /* | |
721 | * If there are bytes that have already been decrypted and have not yet been | |
722 | * read, return those... | |
723 | */ | |
724 | ||
725 | if (sspi->readBufferUsed > 0) | |
726 | { | |
727 | int bytesToCopy = min(sspi->readBufferUsed, len); | |
728 | /* Number of bytes to copy */ | |
729 | ||
730 | memcpy(buf, sspi->readBuffer, bytesToCopy); | |
731 | sspi->readBufferUsed -= bytesToCopy; | |
732 | ||
733 | if (sspi->readBufferUsed > 0) | |
734 | memmove(sspi->readBuffer, sspi->readBuffer + bytesToCopy, sspi->readBufferUsed); | |
735 | ||
736 | DEBUG_printf(("5_httpTLSRead: Returning %d bytes previously decrypted.", bytesToCopy)); | |
737 | ||
738 | return (bytesToCopy); | |
739 | } | |
740 | ||
741 | /* | |
742 | * Initialize security buffer structs | |
743 | */ | |
744 | ||
745 | message.ulVersion = SECBUFFER_VERSION; | |
746 | message.cBuffers = 4; | |
747 | message.pBuffers = buffers; | |
748 | ||
749 | do | |
750 | { | |
751 | /* | |
752 | * If there is not enough space in the buffer, then increase its size... | |
753 | */ | |
754 | ||
755 | if (sspi->decryptBufferLength <= sspi->decryptBufferUsed) | |
756 | { | |
757 | BYTE *temp; /* New buffer */ | |
758 | ||
759 | if (sspi->decryptBufferLength >= 262144) | |
760 | { | |
761 | WSASetLastError(E_OUTOFMEMORY); | |
762 | DEBUG_puts("_httpTLSRead: Decryption buffer too large (>256k)"); | |
763 | return (-1); | |
764 | } | |
765 | ||
766 | if ((temp = realloc(sspi->decryptBuffer, sspi->decryptBufferLength + 4096)) == NULL) | |
767 | { | |
768 | DEBUG_printf(("_httpTLSRead: Unable to allocate %d byte decryption buffer.", sspi->decryptBufferLength + 4096)); | |
769 | WSASetLastError(E_OUTOFMEMORY); | |
770 | return (-1); | |
771 | } | |
772 | ||
773 | sspi->decryptBufferLength += 4096; | |
774 | sspi->decryptBuffer = temp; | |
775 | ||
776 | DEBUG_printf(("_httpTLSRead: Resized decryption buffer to %d bytes.", sspi->decryptBufferLength)); | |
777 | } | |
778 | ||
779 | buffers[0].pvBuffer = sspi->decryptBuffer; | |
780 | buffers[0].cbBuffer = (unsigned long)sspi->decryptBufferUsed; | |
781 | buffers[0].BufferType = SECBUFFER_DATA; | |
782 | buffers[1].BufferType = SECBUFFER_EMPTY; | |
783 | buffers[2].BufferType = SECBUFFER_EMPTY; | |
784 | buffers[3].BufferType = SECBUFFER_EMPTY; | |
785 | ||
786 | DEBUG_printf(("5_httpTLSRead: decryptBufferUsed=%d", sspi->decryptBufferUsed)); | |
787 | ||
788 | scRet = DecryptMessage(&sspi->context, &message, 0, NULL); | |
789 | ||
790 | if (scRet == SEC_E_INCOMPLETE_MESSAGE) | |
791 | { | |
792 | num = recv(http->fd, sspi->decryptBuffer + sspi->decryptBufferUsed, (int)(sspi->decryptBufferLength - sspi->decryptBufferUsed), 0); | |
793 | if (num < 0) | |
794 | { | |
795 | DEBUG_printf(("5_httpTLSRead: recv failed: %d", WSAGetLastError())); | |
796 | return (-1); | |
797 | } | |
798 | else if (num == 0) | |
799 | { | |
800 | DEBUG_puts("5_httpTLSRead: Server disconnected."); | |
801 | return (0); | |
802 | } | |
803 | ||
804 | DEBUG_printf(("5_httpTLSRead: Read %d bytes into decryption buffer.", num)); | |
805 | ||
806 | sspi->decryptBufferUsed += num; | |
807 | } | |
808 | } | |
809 | while (scRet == SEC_E_INCOMPLETE_MESSAGE); | |
810 | ||
811 | if (scRet == SEC_I_CONTEXT_EXPIRED) | |
812 | { | |
813 | DEBUG_puts("5_httpTLSRead: Context expired."); | |
814 | WSASetLastError(WSAECONNRESET); | |
815 | return (-1); | |
816 | } | |
817 | else if (scRet != SEC_E_OK) | |
818 | { | |
819 | DEBUG_printf(("5_httpTLSRead: DecryptMessage failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
820 | WSASetLastError(WSASYSCALLFAILURE); | |
821 | return (-1); | |
822 | } | |
823 | ||
824 | /* | |
825 | * The decryption worked. Now, locate data buffer. | |
826 | */ | |
827 | ||
828 | pDataBuffer = NULL; | |
829 | pExtraBuffer = NULL; | |
830 | ||
831 | for (i = 1; i < 4; i++) | |
832 | { | |
833 | if (buffers[i].BufferType == SECBUFFER_DATA) | |
834 | pDataBuffer = &buffers[i]; | |
835 | else if (!pExtraBuffer && (buffers[i].BufferType == SECBUFFER_EXTRA)) | |
836 | pExtraBuffer = &buffers[i]; | |
837 | } | |
838 | ||
839 | /* | |
840 | * If a data buffer is found, then copy the decrypted bytes to the passed-in | |
841 | * buffer... | |
842 | */ | |
843 | ||
844 | if (pDataBuffer) | |
845 | { | |
846 | int bytesToCopy = min((int)pDataBuffer->cbBuffer, len); | |
847 | /* Number of bytes to copy into buf */ | |
848 | int bytesToSave = pDataBuffer->cbBuffer - bytesToCopy; | |
849 | /* Number of bytes to save in our read buffer */ | |
850 | ||
851 | if (bytesToCopy) | |
852 | memcpy(buf, pDataBuffer->pvBuffer, bytesToCopy); | |
853 | ||
854 | /* | |
855 | * If there are more decrypted bytes than can be copied to the passed in | |
856 | * buffer, then save them... | |
857 | */ | |
858 | ||
859 | if (bytesToSave) | |
860 | { | |
861 | if ((sspi->readBufferLength - sspi->readBufferUsed) < bytesToSave) | |
862 | { | |
863 | BYTE *temp; /* New buffer pointer */ | |
864 | ||
865 | if ((temp = realloc(sspi->readBuffer, sspi->readBufferUsed + bytesToSave)) == NULL) | |
866 | { | |
867 | DEBUG_printf(("_httpTLSRead: Unable to allocate %d bytes.", sspi->readBufferUsed + bytesToSave)); | |
868 | WSASetLastError(E_OUTOFMEMORY); | |
869 | return (-1); | |
870 | } | |
871 | ||
872 | sspi->readBufferLength = sspi->readBufferUsed + bytesToSave; | |
873 | sspi->readBuffer = temp; | |
874 | } | |
875 | ||
876 | memcpy(((BYTE *)sspi->readBuffer) + sspi->readBufferUsed, ((BYTE *)pDataBuffer->pvBuffer) + bytesToCopy, bytesToSave); | |
877 | ||
878 | sspi->readBufferUsed += bytesToSave; | |
879 | } | |
880 | ||
881 | num = bytesToCopy; | |
882 | } | |
883 | else | |
884 | { | |
885 | DEBUG_puts("_httpTLSRead: Unable to find data buffer."); | |
886 | WSASetLastError(WSASYSCALLFAILURE); | |
887 | return (-1); | |
888 | } | |
889 | ||
890 | /* | |
891 | * If the decryption process left extra bytes, then save those back in | |
892 | * decryptBuffer. They will be processed the next time through the loop. | |
893 | */ | |
894 | ||
895 | if (pExtraBuffer) | |
896 | { | |
897 | memmove(sspi->decryptBuffer, pExtraBuffer->pvBuffer, pExtraBuffer->cbBuffer); | |
898 | sspi->decryptBufferUsed = pExtraBuffer->cbBuffer; | |
899 | } | |
900 | else | |
901 | { | |
902 | sspi->decryptBufferUsed = 0; | |
903 | } | |
904 | ||
905 | return (num); | |
906 | } | |
907 | ||
908 | ||
909 | /* | |
910 | * '_httpTLSSetOptions()' - Set TLS protocol and cipher suite options. | |
911 | */ | |
912 | ||
913 | void | |
914 | _httpTLSSetOptions(int options) /* I - Options */ | |
915 | { | |
916 | tls_options = options; | |
917 | } | |
918 | ||
919 | ||
920 | /* | |
921 | * '_httpTLSStart()' - Set up SSL/TLS support on a connection. | |
922 | */ | |
923 | ||
924 | int /* O - 0 on success, -1 on failure */ | |
925 | _httpTLSStart(http_t *http) /* I - HTTP connection */ | |
926 | { | |
927 | char hostname[256], /* Hostname */ | |
928 | *hostptr; /* Pointer into hostname */ | |
929 | ||
930 | ||
931 | DEBUG_printf(("3_httpTLSStart(http=%p)", http)); | |
932 | ||
933 | if (tls_options < 0) | |
934 | { | |
935 | DEBUG_puts("4_httpTLSStart: Setting defaults."); | |
936 | _cupsSetDefaults(); | |
937 | DEBUG_printf(("4_httpTLSStart: tls_options=%x", tls_options)); | |
938 | } | |
939 | ||
940 | if ((http->tls = http_sspi_alloc()) == NULL) | |
941 | return (-1); | |
942 | ||
943 | if (http->mode == _HTTP_MODE_CLIENT) | |
944 | { | |
945 | /* | |
946 | * Client: determine hostname... | |
947 | */ | |
948 | ||
949 | if (httpAddrLocalhost(http->hostaddr)) | |
950 | { | |
951 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
952 | } | |
953 | else | |
954 | { | |
955 | /* | |
956 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
957 | */ | |
958 | ||
959 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
960 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
961 | *hostptr == '.') | |
962 | *hostptr = '\0'; | |
963 | } | |
964 | ||
965 | return (http_sspi_client(http, hostname)); | |
966 | } | |
967 | else | |
968 | { | |
969 | /* | |
970 | * Server: determine hostname to use... | |
971 | */ | |
972 | ||
973 | if (http->fields[HTTP_FIELD_HOST][0]) | |
974 | { | |
975 | /* | |
976 | * Use hostname for TLS upgrade... | |
977 | */ | |
978 | ||
979 | strlcpy(hostname, http->fields[HTTP_FIELD_HOST], sizeof(hostname)); | |
980 | } | |
981 | else | |
982 | { | |
983 | /* | |
984 | * Resolve hostname from connection address... | |
985 | */ | |
986 | ||
987 | http_addr_t addr; /* Connection address */ | |
988 | socklen_t addrlen; /* Length of address */ | |
989 | ||
990 | addrlen = sizeof(addr); | |
991 | if (getsockname(http->fd, (struct sockaddr *)&addr, &addrlen)) | |
992 | { | |
993 | DEBUG_printf(("4_httpTLSStart: Unable to get socket address: %s", strerror(errno))); | |
994 | hostname[0] = '\0'; | |
995 | } | |
996 | else if (httpAddrLocalhost(&addr)) | |
997 | hostname[0] = '\0'; | |
998 | else | |
999 | { | |
1000 | httpAddrLookup(&addr, hostname, sizeof(hostname)); | |
1001 | DEBUG_printf(("4_httpTLSStart: Resolved socket address to \"%s\".", hostname)); | |
1002 | } | |
1003 | } | |
1004 | ||
1005 | return (http_sspi_server(http, hostname)); | |
1006 | } | |
1007 | } | |
1008 | ||
1009 | ||
1010 | /* | |
1011 | * '_httpTLSStop()' - Shut down SSL/TLS on a connection. | |
1012 | */ | |
1013 | ||
1014 | void | |
1015 | _httpTLSStop(http_t *http) /* I - HTTP connection */ | |
1016 | { | |
1017 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
1018 | ||
1019 | ||
1020 | if (sspi->contextInitialized && http->fd >= 0) | |
1021 | { | |
1022 | SecBufferDesc message; /* Array of SecBuffer struct */ | |
1023 | SecBuffer buffers[1] = { 0 }; | |
1024 | /* Security package buffer */ | |
1025 | DWORD dwType; /* Type */ | |
1026 | DWORD status; /* Status */ | |
1027 | ||
1028 | /* | |
1029 | * Notify schannel that we are about to close the connection. | |
1030 | */ | |
1031 | ||
1032 | dwType = SCHANNEL_SHUTDOWN; | |
1033 | ||
1034 | buffers[0].pvBuffer = &dwType; | |
1035 | buffers[0].BufferType = SECBUFFER_TOKEN; | |
1036 | buffers[0].cbBuffer = sizeof(dwType); | |
1037 | ||
1038 | message.cBuffers = 1; | |
1039 | message.pBuffers = buffers; | |
1040 | message.ulVersion = SECBUFFER_VERSION; | |
1041 | ||
1042 | status = ApplyControlToken(&sspi->context, &message); | |
1043 | ||
1044 | if (SUCCEEDED(status)) | |
1045 | { | |
1046 | PBYTE pbMessage; /* Message buffer */ | |
1047 | DWORD cbMessage; /* Message buffer count */ | |
1048 | DWORD cbData; /* Data count */ | |
1049 | DWORD dwSSPIFlags; /* SSL attributes we requested */ | |
1050 | DWORD dwSSPIOutFlags; /* SSL attributes we received */ | |
1051 | TimeStamp tsExpiry; /* Time stamp */ | |
1052 | ||
1053 | dwSSPIFlags = ASC_REQ_SEQUENCE_DETECT | | |
1054 | ASC_REQ_REPLAY_DETECT | | |
1055 | ASC_REQ_CONFIDENTIALITY | | |
1056 | ASC_REQ_EXTENDED_ERROR | | |
1057 | ASC_REQ_ALLOCATE_MEMORY | | |
1058 | ASC_REQ_STREAM; | |
1059 | ||
1060 | buffers[0].pvBuffer = NULL; | |
1061 | buffers[0].BufferType = SECBUFFER_TOKEN; | |
1062 | buffers[0].cbBuffer = 0; | |
1063 | ||
1064 | message.cBuffers = 1; | |
1065 | message.pBuffers = buffers; | |
1066 | message.ulVersion = SECBUFFER_VERSION; | |
1067 | ||
1068 | status = AcceptSecurityContext(&sspi->creds, &sspi->context, NULL, | |
1069 | dwSSPIFlags, SECURITY_NATIVE_DREP, NULL, | |
1070 | &message, &dwSSPIOutFlags, &tsExpiry); | |
1071 | ||
1072 | if (SUCCEEDED(status)) | |
1073 | { | |
1074 | pbMessage = buffers[0].pvBuffer; | |
1075 | cbMessage = buffers[0].cbBuffer; | |
1076 | ||
1077 | /* | |
1078 | * Send the close notify message to the client. | |
1079 | */ | |
1080 | ||
1081 | if (pbMessage && cbMessage) | |
1082 | { | |
1083 | cbData = send(http->fd, pbMessage, cbMessage, 0); | |
1084 | if ((cbData == SOCKET_ERROR) || (cbData == 0)) | |
1085 | { | |
1086 | status = WSAGetLastError(); | |
1087 | DEBUG_printf(("_httpTLSStop: sending close notify failed: %d", status)); | |
1088 | } | |
1089 | else | |
1090 | { | |
1091 | FreeContextBuffer(pbMessage); | |
1092 | } | |
1093 | } | |
1094 | } | |
1095 | else | |
1096 | { | |
1097 | DEBUG_printf(("_httpTLSStop: AcceptSecurityContext failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), status))); | |
1098 | } | |
1099 | } | |
1100 | else | |
1101 | { | |
1102 | DEBUG_printf(("_httpTLSStop: ApplyControlToken failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), status))); | |
1103 | } | |
1104 | } | |
1105 | ||
1106 | http_sspi_free(sspi); | |
1107 | ||
1108 | http->tls = NULL; | |
1109 | } | |
1110 | ||
1111 | ||
1112 | /* | |
1113 | * '_httpTLSWrite()' - Write to a SSL/TLS connection. | |
1114 | */ | |
1115 | ||
1116 | int /* O - Bytes written */ | |
1117 | _httpTLSWrite(http_t *http, /* I - HTTP connection */ | |
1118 | const char *buf, /* I - Buffer holding data */ | |
1119 | int len) /* I - Length of buffer */ | |
1120 | { | |
1121 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
1122 | SecBufferDesc message; /* Array of SecBuffer struct */ | |
1123 | SecBuffer buffers[4] = { 0 }; /* Security package buffer */ | |
1124 | int bufferLen; /* Buffer length */ | |
1125 | int bytesLeft; /* Bytes left to write */ | |
1126 | const char *bufptr; /* Pointer into buffer */ | |
1127 | int num = 0; /* Return value */ | |
1128 | ||
1129 | ||
1130 | bufferLen = sspi->streamSizes.cbMaximumMessage + sspi->streamSizes.cbHeader + sspi->streamSizes.cbTrailer; | |
1131 | ||
1132 | if (bufferLen > sspi->writeBufferLength) | |
1133 | { | |
1134 | BYTE *temp; /* New buffer pointer */ | |
1135 | ||
1136 | if ((temp = (BYTE *)realloc(sspi->writeBuffer, bufferLen)) == NULL) | |
1137 | { | |
1138 | DEBUG_printf(("_httpTLSWrite: Unable to allocate buffer of %d bytes.", bufferLen)); | |
1139 | WSASetLastError(E_OUTOFMEMORY); | |
1140 | return (-1); | |
1141 | } | |
1142 | ||
1143 | sspi->writeBuffer = temp; | |
1144 | sspi->writeBufferLength = bufferLen; | |
1145 | } | |
1146 | ||
1147 | bytesLeft = len; | |
1148 | bufptr = buf; | |
1149 | ||
1150 | while (bytesLeft) | |
1151 | { | |
1152 | int chunk = min((int)sspi->streamSizes.cbMaximumMessage, bytesLeft); | |
1153 | /* Size of data to write */ | |
1154 | SECURITY_STATUS scRet; /* SSPI status */ | |
1155 | ||
1156 | /* | |
1157 | * Copy user data into the buffer, starting just past the header... | |
1158 | */ | |
1159 | ||
1160 | memcpy(sspi->writeBuffer + sspi->streamSizes.cbHeader, bufptr, chunk); | |
1161 | ||
1162 | /* | |
1163 | * Setup the SSPI buffers | |
1164 | */ | |
1165 | ||
1166 | message.ulVersion = SECBUFFER_VERSION; | |
1167 | message.cBuffers = 4; | |
1168 | message.pBuffers = buffers; | |
1169 | ||
1170 | buffers[0].pvBuffer = sspi->writeBuffer; | |
1171 | buffers[0].cbBuffer = sspi->streamSizes.cbHeader; | |
1172 | buffers[0].BufferType = SECBUFFER_STREAM_HEADER; | |
1173 | buffers[1].pvBuffer = sspi->writeBuffer + sspi->streamSizes.cbHeader; | |
1174 | buffers[1].cbBuffer = (unsigned long) chunk; | |
1175 | buffers[1].BufferType = SECBUFFER_DATA; | |
1176 | buffers[2].pvBuffer = sspi->writeBuffer + sspi->streamSizes.cbHeader + chunk; | |
1177 | buffers[2].cbBuffer = sspi->streamSizes.cbTrailer; | |
1178 | buffers[2].BufferType = SECBUFFER_STREAM_TRAILER; | |
1179 | buffers[3].BufferType = SECBUFFER_EMPTY; | |
1180 | ||
1181 | /* | |
1182 | * Encrypt the data | |
1183 | */ | |
1184 | ||
1185 | scRet = EncryptMessage(&sspi->context, 0, &message, 0); | |
1186 | ||
1187 | if (FAILED(scRet)) | |
1188 | { | |
1189 | DEBUG_printf(("_httpTLSWrite: EncryptMessage failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1190 | WSASetLastError(WSASYSCALLFAILURE); | |
1191 | return (-1); | |
1192 | } | |
1193 | ||
1194 | /* | |
1195 | * Send the data. Remember the size of the total data to send is the size | |
1196 | * of the header, the size of the data the caller passed in and the size | |
1197 | * of the trailer... | |
1198 | */ | |
1199 | ||
1200 | num = send(http->fd, sspi->writeBuffer, buffers[0].cbBuffer + buffers[1].cbBuffer + buffers[2].cbBuffer, 0); | |
1201 | ||
1202 | if (num <= 0) | |
1203 | { | |
1204 | DEBUG_printf(("_httpTLSWrite: send failed: %ld", WSAGetLastError())); | |
1205 | return (num); | |
1206 | } | |
1207 | ||
1208 | bytesLeft -= chunk; | |
1209 | bufptr += chunk; | |
1210 | } | |
1211 | ||
1212 | return (len); | |
1213 | } | |
1214 | ||
1215 | ||
1216 | #if 0 | |
1217 | /* | |
1218 | * 'http_setup_ssl()' - Set up SSL/TLS support on a connection. | |
1219 | */ | |
1220 | ||
1221 | static int /* O - 0 on success, -1 on failure */ | |
1222 | http_setup_ssl(http_t *http) /* I - Connection to server */ | |
1223 | { | |
1224 | char hostname[256], /* Hostname */ | |
1225 | *hostptr; /* Pointer into hostname */ | |
1226 | ||
1227 | TCHAR username[256]; /* Username returned from GetUserName() */ | |
1228 | TCHAR commonName[256];/* Common name for certificate */ | |
1229 | DWORD dwSize; /* 32 bit size */ | |
1230 | ||
1231 | ||
1232 | DEBUG_printf(("7http_setup_ssl(http=%p)", http)); | |
1233 | ||
1234 | /* | |
1235 | * Get the hostname to use for SSL... | |
1236 | */ | |
1237 | ||
1238 | if (httpAddrLocalhost(http->hostaddr)) | |
1239 | { | |
1240 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
1241 | } | |
1242 | else | |
1243 | { | |
1244 | /* | |
1245 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
1246 | */ | |
1247 | ||
1248 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
1249 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
1250 | *hostptr == '.') | |
1251 | *hostptr = '\0'; | |
1252 | } | |
1253 | ||
1254 | http->tls = http_sspi_alloc(); | |
1255 | ||
1256 | if (!http->tls) | |
1257 | { | |
1258 | _cupsSetHTTPError(HTTP_STATUS_ERROR); | |
1259 | return (-1); | |
1260 | } | |
1261 | ||
1262 | dwSize = sizeof(username) / sizeof(TCHAR); | |
1263 | GetUserName(username, &dwSize); | |
1264 | _sntprintf_s(commonName, sizeof(commonName) / sizeof(TCHAR), | |
1265 | sizeof(commonName) / sizeof(TCHAR), TEXT("CN=%s"), username); | |
1266 | ||
1267 | if (!_sspiGetCredentials(http->tls, L"ClientContainer", | |
1268 | commonName, FALSE)) | |
1269 | { | |
1270 | _sspiFree(http->tls); | |
1271 | http->tls = NULL; | |
1272 | ||
1273 | http->error = EIO; | |
1274 | http->status = HTTP_STATUS_ERROR; | |
1275 | ||
1276 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, | |
1277 | _("Unable to establish a secure connection to host."), 1); | |
1278 | ||
1279 | return (-1); | |
1280 | } | |
1281 | ||
1282 | _sspiSetAllowsAnyRoot(http->tls, TRUE); | |
1283 | _sspiSetAllowsExpiredCerts(http->tls, TRUE); | |
1284 | ||
1285 | if (!_sspiConnect(http->tls, hostname)) | |
1286 | { | |
1287 | _sspiFree(http->tls); | |
1288 | http->tls = NULL; | |
1289 | ||
1290 | http->error = EIO; | |
1291 | http->status = HTTP_STATUS_ERROR; | |
1292 | ||
1293 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, | |
1294 | _("Unable to establish a secure connection to host."), 1); | |
1295 | ||
1296 | return (-1); | |
1297 | } | |
1298 | ||
1299 | return (0); | |
1300 | } | |
1301 | #endif // 0 | |
1302 | ||
1303 | ||
1304 | /* | |
1305 | * 'http_sspi_alloc()' - Allocate SSPI object. | |
1306 | */ | |
1307 | ||
1308 | static _http_sspi_t * /* O - New SSPI/SSL object */ | |
1309 | http_sspi_alloc(void) | |
1310 | { | |
1311 | return ((_http_sspi_t *)calloc(sizeof(_http_sspi_t), 1)); | |
1312 | } | |
1313 | ||
1314 | ||
1315 | /* | |
1316 | * 'http_sspi_client()' - Negotiate a TLS connection as a client. | |
1317 | */ | |
1318 | ||
1319 | static int /* O - 0 on success, -1 on failure */ | |
1320 | http_sspi_client(http_t *http, /* I - Client connection */ | |
1321 | const char *hostname) /* I - Server hostname */ | |
1322 | { | |
1323 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
1324 | DWORD dwSize; /* Size for buffer */ | |
1325 | DWORD dwSSPIFlags; /* SSL connection attributes we want */ | |
1326 | DWORD dwSSPIOutFlags; /* SSL connection attributes we got */ | |
1327 | TimeStamp tsExpiry; /* Time stamp */ | |
1328 | SECURITY_STATUS scRet; /* Status */ | |
1329 | int cbData; /* Data count */ | |
1330 | SecBufferDesc inBuffer; /* Array of SecBuffer structs */ | |
1331 | SecBuffer inBuffers[2]; /* Security package buffer */ | |
1332 | SecBufferDesc outBuffer; /* Array of SecBuffer structs */ | |
1333 | SecBuffer outBuffers[1]; /* Security package buffer */ | |
1334 | int ret = 0; /* Return value */ | |
1335 | char username[1024], /* Current username */ | |
1336 | common_name[1024]; /* CN=username */ | |
1337 | ||
1338 | ||
1339 | DEBUG_printf(("4http_sspi_client(http=%p, hostname=\"%s\")", http, hostname)); | |
1340 | ||
1341 | dwSSPIFlags = ISC_REQ_SEQUENCE_DETECT | | |
1342 | ISC_REQ_REPLAY_DETECT | | |
1343 | ISC_REQ_CONFIDENTIALITY | | |
1344 | ISC_RET_EXTENDED_ERROR | | |
1345 | ISC_REQ_ALLOCATE_MEMORY | | |
1346 | ISC_REQ_STREAM; | |
1347 | ||
1348 | /* | |
1349 | * Lookup the client certificate... | |
1350 | */ | |
1351 | ||
1352 | dwSize = sizeof(username); | |
1353 | GetUserName(username, &dwSize); | |
1354 | snprintf(common_name, sizeof(common_name), "CN=%s", username); | |
1355 | ||
1356 | if (!http_sspi_find_credentials(http, L"ClientContainer", common_name)) | |
1357 | if (!http_sspi_make_credentials(http->tls, L"ClientContainer", common_name, _HTTP_MODE_CLIENT, 10)) | |
1358 | { | |
1359 | DEBUG_puts("5http_sspi_client: Unable to get client credentials."); | |
1360 | return (-1); | |
1361 | } | |
1362 | ||
1363 | /* | |
1364 | * Initiate a ClientHello message and generate a token. | |
1365 | */ | |
1366 | ||
1367 | outBuffers[0].pvBuffer = NULL; | |
1368 | outBuffers[0].BufferType = SECBUFFER_TOKEN; | |
1369 | outBuffers[0].cbBuffer = 0; | |
1370 | ||
1371 | outBuffer.cBuffers = 1; | |
1372 | outBuffer.pBuffers = outBuffers; | |
1373 | outBuffer.ulVersion = SECBUFFER_VERSION; | |
1374 | ||
1375 | scRet = InitializeSecurityContext(&sspi->creds, NULL, TEXT(""), dwSSPIFlags, 0, SECURITY_NATIVE_DREP, NULL, 0, &sspi->context, &outBuffer, &dwSSPIOutFlags, &tsExpiry); | |
1376 | ||
1377 | if (scRet != SEC_I_CONTINUE_NEEDED) | |
1378 | { | |
1379 | DEBUG_printf(("5http_sspi_client: InitializeSecurityContext(1) failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1380 | return (-1); | |
1381 | } | |
1382 | ||
1383 | /* | |
1384 | * Send response to server if there is one. | |
1385 | */ | |
1386 | ||
1387 | if (outBuffers[0].cbBuffer && outBuffers[0].pvBuffer) | |
1388 | { | |
1389 | if ((cbData = send(http->fd, outBuffers[0].pvBuffer, outBuffers[0].cbBuffer, 0)) <= 0) | |
1390 | { | |
1391 | DEBUG_printf(("5http_sspi_client: send failed: %d", WSAGetLastError())); | |
1392 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1393 | DeleteSecurityContext(&sspi->context); | |
1394 | return (-1); | |
1395 | } | |
1396 | ||
1397 | DEBUG_printf(("5http_sspi_client: %d bytes of handshake data sent.", cbData)); | |
1398 | ||
1399 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1400 | outBuffers[0].pvBuffer = NULL; | |
1401 | } | |
1402 | ||
1403 | dwSSPIFlags = ISC_REQ_MANUAL_CRED_VALIDATION | | |
1404 | ISC_REQ_SEQUENCE_DETECT | | |
1405 | ISC_REQ_REPLAY_DETECT | | |
1406 | ISC_REQ_CONFIDENTIALITY | | |
1407 | ISC_RET_EXTENDED_ERROR | | |
1408 | ISC_REQ_ALLOCATE_MEMORY | | |
1409 | ISC_REQ_STREAM; | |
1410 | ||
1411 | sspi->decryptBufferUsed = 0; | |
1412 | ||
1413 | /* | |
1414 | * Loop until the handshake is finished or an error occurs. | |
1415 | */ | |
1416 | ||
1417 | scRet = SEC_I_CONTINUE_NEEDED; | |
1418 | ||
1419 | while(scRet == SEC_I_CONTINUE_NEEDED || | |
1420 | scRet == SEC_E_INCOMPLETE_MESSAGE || | |
1421 | scRet == SEC_I_INCOMPLETE_CREDENTIALS) | |
1422 | { | |
1423 | if (sspi->decryptBufferUsed == 0 || scRet == SEC_E_INCOMPLETE_MESSAGE) | |
1424 | { | |
1425 | if (sspi->decryptBufferLength <= sspi->decryptBufferUsed) | |
1426 | { | |
1427 | BYTE *temp; /* New buffer */ | |
1428 | ||
1429 | if (sspi->decryptBufferLength >= 262144) | |
1430 | { | |
1431 | WSASetLastError(E_OUTOFMEMORY); | |
1432 | DEBUG_puts("5http_sspi_client: Decryption buffer too large (>256k)"); | |
1433 | return (-1); | |
1434 | } | |
1435 | ||
1436 | if ((temp = realloc(sspi->decryptBuffer, sspi->decryptBufferLength + 4096)) == NULL) | |
1437 | { | |
1438 | DEBUG_printf(("5http_sspi_client: Unable to allocate %d byte buffer.", sspi->decryptBufferLength + 4096)); | |
1439 | WSASetLastError(E_OUTOFMEMORY); | |
1440 | return (-1); | |
1441 | } | |
1442 | ||
1443 | sspi->decryptBufferLength += 4096; | |
1444 | sspi->decryptBuffer = temp; | |
1445 | } | |
1446 | ||
1447 | cbData = recv(http->fd, sspi->decryptBuffer + sspi->decryptBufferUsed, (int)(sspi->decryptBufferLength - sspi->decryptBufferUsed), 0); | |
1448 | ||
1449 | if (cbData < 0) | |
1450 | { | |
1451 | DEBUG_printf(("5http_sspi_client: recv failed: %d", WSAGetLastError())); | |
1452 | return (-1); | |
1453 | } | |
1454 | else if (cbData == 0) | |
1455 | { | |
1456 | DEBUG_printf(("5http_sspi_client: Server unexpectedly disconnected.")); | |
1457 | return (-1); | |
1458 | } | |
1459 | ||
1460 | DEBUG_printf(("5http_sspi_client: %d bytes of handshake data received", cbData)); | |
1461 | ||
1462 | sspi->decryptBufferUsed += cbData; | |
1463 | } | |
1464 | ||
1465 | /* | |
1466 | * Set up the input buffers. Buffer 0 is used to pass in data received from | |
1467 | * the server. Schannel will consume some or all of this. Leftover data | |
1468 | * (if any) will be placed in buffer 1 and given a buffer type of | |
1469 | * SECBUFFER_EXTRA. | |
1470 | */ | |
1471 | ||
1472 | inBuffers[0].pvBuffer = sspi->decryptBuffer; | |
1473 | inBuffers[0].cbBuffer = (unsigned long)sspi->decryptBufferUsed; | |
1474 | inBuffers[0].BufferType = SECBUFFER_TOKEN; | |
1475 | ||
1476 | inBuffers[1].pvBuffer = NULL; | |
1477 | inBuffers[1].cbBuffer = 0; | |
1478 | inBuffers[1].BufferType = SECBUFFER_EMPTY; | |
1479 | ||
1480 | inBuffer.cBuffers = 2; | |
1481 | inBuffer.pBuffers = inBuffers; | |
1482 | inBuffer.ulVersion = SECBUFFER_VERSION; | |
1483 | ||
1484 | /* | |
1485 | * Set up the output buffers. These are initialized to NULL so as to make it | |
1486 | * less likely we'll attempt to free random garbage later. | |
1487 | */ | |
1488 | ||
1489 | outBuffers[0].pvBuffer = NULL; | |
1490 | outBuffers[0].BufferType = SECBUFFER_TOKEN; | |
1491 | outBuffers[0].cbBuffer = 0; | |
1492 | ||
1493 | outBuffer.cBuffers = 1; | |
1494 | outBuffer.pBuffers = outBuffers; | |
1495 | outBuffer.ulVersion = SECBUFFER_VERSION; | |
1496 | ||
1497 | /* | |
1498 | * Call InitializeSecurityContext. | |
1499 | */ | |
1500 | ||
1501 | scRet = InitializeSecurityContext(&sspi->creds, &sspi->context, NULL, dwSSPIFlags, 0, SECURITY_NATIVE_DREP, &inBuffer, 0, NULL, &outBuffer, &dwSSPIOutFlags, &tsExpiry); | |
1502 | ||
1503 | /* | |
1504 | * If InitializeSecurityContext was successful (or if the error was one of | |
1505 | * the special extended ones), send the contents of the output buffer to the | |
1506 | * server. | |
1507 | */ | |
1508 | ||
1509 | if (scRet == SEC_E_OK || | |
1510 | scRet == SEC_I_CONTINUE_NEEDED || | |
1511 | FAILED(scRet) && (dwSSPIOutFlags & ISC_RET_EXTENDED_ERROR)) | |
1512 | { | |
1513 | if (outBuffers[0].cbBuffer && outBuffers[0].pvBuffer) | |
1514 | { | |
1515 | cbData = send(http->fd, outBuffers[0].pvBuffer, outBuffers[0].cbBuffer, 0); | |
1516 | ||
1517 | if (cbData <= 0) | |
1518 | { | |
1519 | DEBUG_printf(("5http_sspi_client: send failed: %d", WSAGetLastError())); | |
1520 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1521 | DeleteSecurityContext(&sspi->context); | |
1522 | return (-1); | |
1523 | } | |
1524 | ||
1525 | DEBUG_printf(("5http_sspi_client: %d bytes of handshake data sent.", cbData)); | |
1526 | ||
1527 | /* | |
1528 | * Free output buffer. | |
1529 | */ | |
1530 | ||
1531 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1532 | outBuffers[0].pvBuffer = NULL; | |
1533 | } | |
1534 | } | |
1535 | ||
1536 | /* | |
1537 | * If InitializeSecurityContext returned SEC_E_INCOMPLETE_MESSAGE, then we | |
1538 | * need to read more data from the server and try again. | |
1539 | */ | |
1540 | ||
1541 | if (scRet == SEC_E_INCOMPLETE_MESSAGE) | |
1542 | continue; | |
1543 | ||
1544 | /* | |
1545 | * If InitializeSecurityContext returned SEC_E_OK, then the handshake | |
1546 | * completed successfully. | |
1547 | */ | |
1548 | ||
1549 | if (scRet == SEC_E_OK) | |
1550 | { | |
1551 | /* | |
1552 | * If the "extra" buffer contains data, this is encrypted application | |
1553 | * protocol layer stuff. It needs to be saved. The application layer will | |
1554 | * later decrypt it with DecryptMessage. | |
1555 | */ | |
1556 | ||
1557 | DEBUG_puts("5http_sspi_client: Handshake was successful."); | |
1558 | ||
1559 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
1560 | { | |
1561 | memmove(sspi->decryptBuffer, sspi->decryptBuffer + sspi->decryptBufferUsed - inBuffers[1].cbBuffer, inBuffers[1].cbBuffer); | |
1562 | ||
1563 | sspi->decryptBufferUsed = inBuffers[1].cbBuffer; | |
1564 | ||
1565 | DEBUG_printf(("5http_sspi_client: %d bytes of app data was bundled with handshake data", sspi->decryptBufferUsed)); | |
1566 | } | |
1567 | else | |
1568 | sspi->decryptBufferUsed = 0; | |
1569 | ||
1570 | /* | |
1571 | * Bail out to quit | |
1572 | */ | |
1573 | ||
1574 | break; | |
1575 | } | |
1576 | ||
1577 | /* | |
1578 | * Check for fatal error. | |
1579 | */ | |
1580 | ||
1581 | if (FAILED(scRet)) | |
1582 | { | |
1583 | DEBUG_printf(("5http_sspi_client: InitializeSecurityContext(2) failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1584 | ret = -1; | |
1585 | break; | |
1586 | } | |
1587 | ||
1588 | /* | |
1589 | * If InitializeSecurityContext returned SEC_I_INCOMPLETE_CREDENTIALS, | |
1590 | * then the server just requested client authentication. | |
1591 | */ | |
1592 | ||
1593 | if (scRet == SEC_I_INCOMPLETE_CREDENTIALS) | |
1594 | { | |
1595 | /* | |
1596 | * Unimplemented | |
1597 | */ | |
1598 | ||
1599 | DEBUG_printf(("5http_sspi_client: server requested client credentials.")); | |
1600 | ret = -1; | |
1601 | break; | |
1602 | } | |
1603 | ||
1604 | /* | |
1605 | * Copy any leftover data from the "extra" buffer, and go around again. | |
1606 | */ | |
1607 | ||
1608 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
1609 | { | |
1610 | memmove(sspi->decryptBuffer, sspi->decryptBuffer + sspi->decryptBufferUsed - inBuffers[1].cbBuffer, inBuffers[1].cbBuffer); | |
1611 | ||
1612 | sspi->decryptBufferUsed = inBuffers[1].cbBuffer; | |
1613 | } | |
1614 | else | |
1615 | { | |
1616 | sspi->decryptBufferUsed = 0; | |
1617 | } | |
1618 | } | |
1619 | ||
1620 | if (!ret) | |
1621 | { | |
1622 | /* | |
1623 | * Success! Get the server cert | |
1624 | */ | |
1625 | ||
1626 | sspi->contextInitialized = TRUE; | |
1627 | ||
1628 | scRet = QueryContextAttributes(&sspi->context, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (VOID *)&(sspi->remoteCert)); | |
1629 | ||
1630 | if (scRet != SEC_E_OK) | |
1631 | { | |
1632 | DEBUG_printf(("5http_sspi_client: QueryContextAttributes failed(SECPKG_ATTR_REMOTE_CERT_CONTEXT): %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1633 | return (-1); | |
1634 | } | |
1635 | ||
1636 | /* | |
1637 | * Find out how big the header/trailer will be: | |
1638 | */ | |
1639 | ||
1640 | scRet = QueryContextAttributes(&sspi->context, SECPKG_ATTR_STREAM_SIZES, &sspi->streamSizes); | |
1641 | ||
1642 | if (scRet != SEC_E_OK) | |
1643 | { | |
1644 | DEBUG_printf(("5http_sspi_client: QueryContextAttributes failed(SECPKG_ATTR_STREAM_SIZES): %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1645 | ret = -1; | |
1646 | } | |
1647 | } | |
1648 | ||
1649 | return (ret); | |
1650 | } | |
1651 | ||
1652 | ||
1653 | /* | |
1654 | * 'http_sspi_create_credential()' - Create an SSPI certificate context. | |
1655 | */ | |
1656 | ||
1657 | static PCCERT_CONTEXT /* O - Certificate context */ | |
1658 | http_sspi_create_credential( | |
1659 | http_credential_t *cred) /* I - Credential */ | |
1660 | { | |
1661 | if (cred) | |
1662 | return (CertCreateCertificateContext(X509_ASN_ENCODING, cred->data, cred->datalen)); | |
1663 | else | |
1664 | return (NULL); | |
1665 | } | |
1666 | ||
1667 | ||
1668 | /* | |
1669 | * 'http_sspi_find_credentials()' - Retrieve a TLS certificate from the system store. | |
1670 | */ | |
1671 | ||
1672 | static BOOL /* O - 1 on success, 0 on failure */ | |
1673 | http_sspi_find_credentials( | |
1674 | http_t *http, /* I - HTTP connection */ | |
1675 | const LPWSTR container, /* I - Cert container name */ | |
1676 | const char *common_name) /* I - Common name of certificate */ | |
1677 | { | |
1678 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
1679 | HCERTSTORE store = NULL; /* Certificate store */ | |
1680 | PCCERT_CONTEXT storedContext = NULL; /* Context created from the store */ | |
1681 | DWORD dwSize = 0; /* 32 bit size */ | |
1682 | PBYTE p = NULL; /* Temporary storage */ | |
1683 | HCRYPTPROV hProv = (HCRYPTPROV)NULL; | |
1684 | /* Handle to a CSP */ | |
1685 | CERT_NAME_BLOB sib; /* Arbitrary array of bytes */ | |
1686 | SCHANNEL_CRED SchannelCred; /* Schannel credential data */ | |
1687 | TimeStamp tsExpiry; /* Time stamp */ | |
1688 | SECURITY_STATUS Status; /* Status */ | |
1689 | BOOL ok = TRUE; /* Return value */ | |
1690 | ||
1691 | ||
1692 | if (!CryptAcquireContextW(&hProv, (LPWSTR)container, MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET)) | |
1693 | { | |
1694 | if (GetLastError() == NTE_EXISTS) | |
1695 | { | |
1696 | if (!CryptAcquireContextW(&hProv, (LPWSTR)container, MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET)) | |
1697 | { | |
1698 | DEBUG_printf(("5http_sspi_find_credentials: CryptAcquireContext failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1699 | ok = FALSE; | |
1700 | goto cleanup; | |
1701 | } | |
1702 | } | |
1703 | } | |
1704 | ||
1705 | 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"); | |
1706 | ||
1707 | if (!store) | |
1708 | { | |
1709 | DEBUG_printf(("5http_sspi_find_credentials: CertOpenSystemStore failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1710 | ok = FALSE; | |
1711 | goto cleanup; | |
1712 | } | |
1713 | ||
1714 | dwSize = 0; | |
1715 | ||
1716 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, NULL, &dwSize, NULL)) | |
1717 | { | |
1718 | DEBUG_printf(("5http_sspi_find_credentials: CertStrToName failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1719 | ok = FALSE; | |
1720 | goto cleanup; | |
1721 | } | |
1722 | ||
1723 | p = (PBYTE)malloc(dwSize); | |
1724 | ||
1725 | if (!p) | |
1726 | { | |
1727 | DEBUG_printf(("5http_sspi_find_credentials: malloc failed for %d bytes.", dwSize)); | |
1728 | ok = FALSE; | |
1729 | goto cleanup; | |
1730 | } | |
1731 | ||
1732 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, p, &dwSize, NULL)) | |
1733 | { | |
1734 | DEBUG_printf(("5http_sspi_find_credentials: CertStrToName failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1735 | ok = FALSE; | |
1736 | goto cleanup; | |
1737 | } | |
1738 | ||
1739 | sib.cbData = dwSize; | |
1740 | sib.pbData = p; | |
1741 | ||
1742 | storedContext = CertFindCertificateInStore(store, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, 0, CERT_FIND_SUBJECT_NAME, &sib, NULL); | |
1743 | ||
1744 | if (!storedContext) | |
1745 | { | |
1746 | DEBUG_printf(("5http_sspi_find_credentials: Unable to find credentials for \"%s\".", common_name)); | |
1747 | ok = FALSE; | |
1748 | goto cleanup; | |
1749 | } | |
1750 | ||
1751 | ZeroMemory(&SchannelCred, sizeof(SchannelCred)); | |
1752 | ||
1753 | SchannelCred.dwVersion = SCHANNEL_CRED_VERSION; | |
1754 | SchannelCred.cCreds = 1; | |
1755 | SchannelCred.paCred = &storedContext; | |
1756 | ||
1757 | /* | |
1758 | * Set supported protocols (can also be overriden in the registry...) | |
1759 | */ | |
1760 | ||
1761 | #ifdef SP_PROT_TLS1_2_SERVER | |
1762 | if (http->mode == _HTTP_MODE_SERVER) | |
1763 | { | |
1764 | if (tls_options & _HTTP_TLS_DENY_TLS10) | |
1765 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_2_SERVER | SP_PROT_TLS1_1_SERVER; | |
1766 | else if (tls_options & _HTTP_TLS_ALLOW_SSL3) | |
1767 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_2_SERVER | SP_PROT_TLS1_1_SERVER | SP_PROT_TLS1_0_SERVER | SP_PROT_SSL3_SERVER; | |
1768 | else | |
1769 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_2_SERVER | SP_PROT_TLS1_1_SERVER | SP_PROT_TLS1_0_SERVER; | |
1770 | } | |
1771 | else | |
1772 | { | |
1773 | if (tls_options & _HTTP_TLS_DENY_TLS10) | |
1774 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_2_CLIENT | SP_PROT_TLS1_1_CLIENT; | |
1775 | else if (tls_options & _HTTP_TLS_ALLOW_SSL3) | |
1776 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_2_CLIENT | SP_PROT_TLS1_1_CLIENT | SP_PROT_TLS1_0_CLIENT | SP_PROT_SSL3_CLIENT; | |
1777 | else | |
1778 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_2_CLIENT | SP_PROT_TLS1_1_CLIENT | SP_PROT_TLS1_0_CLIENT; | |
1779 | } | |
1780 | ||
1781 | #else | |
1782 | if (http->mode == _HTTP_MODE_SERVER) | |
1783 | { | |
1784 | if (tls_options & _HTTP_TLS_ALLOW_SSL3) | |
1785 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_SERVER | SP_PROT_SSL3_SERVER; | |
1786 | else | |
1787 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_SERVER; | |
1788 | } | |
1789 | else | |
1790 | { | |
1791 | if (tls_options & _HTTP_TLS_ALLOW_SSL3) | |
1792 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_CLIENT | SP_PROT_SSL3_CLIENT; | |
1793 | else | |
1794 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_CLIENT; | |
1795 | } | |
1796 | #endif /* SP_PROT_TLS1_2_SERVER */ | |
1797 | ||
1798 | /* TODO: Support _HTTP_TLS_ALLOW_RC4 and _HTTP_TLS_ALLOW_DH options; right now we'll rely on Windows registry to enable/disable RC4/DH... */ | |
1799 | ||
1800 | /* | |
1801 | * Create an SSPI credential. | |
1802 | */ | |
1803 | ||
1804 | Status = AcquireCredentialsHandle(NULL, UNISP_NAME, http->mode == _HTTP_MODE_SERVER ? SECPKG_CRED_INBOUND : SECPKG_CRED_OUTBOUND, NULL, &SchannelCred, NULL, NULL, &sspi->creds, &tsExpiry); | |
1805 | if (Status != SEC_E_OK) | |
1806 | { | |
1807 | DEBUG_printf(("5http_sspi_find_credentials: AcquireCredentialsHandle failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), Status))); | |
1808 | ok = FALSE; | |
1809 | goto cleanup; | |
1810 | } | |
1811 | ||
1812 | cleanup: | |
1813 | ||
1814 | /* | |
1815 | * Cleanup | |
1816 | */ | |
1817 | ||
1818 | if (storedContext) | |
1819 | CertFreeCertificateContext(storedContext); | |
1820 | ||
1821 | if (p) | |
1822 | free(p); | |
1823 | ||
1824 | if (store) | |
1825 | CertCloseStore(store, 0); | |
1826 | ||
1827 | if (hProv) | |
1828 | CryptReleaseContext(hProv, 0); | |
1829 | ||
1830 | return (ok); | |
1831 | } | |
1832 | ||
1833 | ||
1834 | /* | |
1835 | * 'http_sspi_free()' - Close a connection and free resources. | |
1836 | */ | |
1837 | ||
1838 | static void | |
1839 | http_sspi_free(_http_sspi_t *sspi) /* I - SSPI data */ | |
1840 | { | |
1841 | if (!sspi) | |
1842 | return; | |
1843 | ||
1844 | if (sspi->contextInitialized) | |
1845 | DeleteSecurityContext(&sspi->context); | |
1846 | ||
1847 | if (sspi->decryptBuffer) | |
1848 | free(sspi->decryptBuffer); | |
1849 | ||
1850 | if (sspi->readBuffer) | |
1851 | free(sspi->readBuffer); | |
1852 | ||
1853 | if (sspi->writeBuffer) | |
1854 | free(sspi->writeBuffer); | |
1855 | ||
1856 | if (sspi->localCert) | |
1857 | CertFreeCertificateContext(sspi->localCert); | |
1858 | ||
1859 | if (sspi->remoteCert) | |
1860 | CertFreeCertificateContext(sspi->remoteCert); | |
1861 | ||
1862 | free(sspi); | |
1863 | } | |
1864 | ||
1865 | ||
1866 | /* | |
1867 | * 'http_sspi_make_credentials()' - Create a TLS certificate in the system store. | |
1868 | */ | |
1869 | ||
1870 | static BOOL /* O - 1 on success, 0 on failure */ | |
1871 | http_sspi_make_credentials( | |
1872 | _http_sspi_t *sspi, /* I - SSPI data */ | |
1873 | const LPWSTR container, /* I - Cert container name */ | |
1874 | const char *common_name, /* I - Common name of certificate */ | |
1875 | _http_mode_t mode, /* I - Client or server? */ | |
1876 | int years) /* I - Years until expiration */ | |
1877 | { | |
1878 | HCERTSTORE store = NULL; /* Certificate store */ | |
1879 | PCCERT_CONTEXT storedContext = NULL; /* Context created from the store */ | |
1880 | PCCERT_CONTEXT createdContext = NULL; /* Context created by us */ | |
1881 | DWORD dwSize = 0; /* 32 bit size */ | |
1882 | PBYTE p = NULL; /* Temporary storage */ | |
1883 | HCRYPTPROV hProv = (HCRYPTPROV)NULL; | |
1884 | /* Handle to a CSP */ | |
1885 | CERT_NAME_BLOB sib; /* Arbitrary array of bytes */ | |
1886 | SCHANNEL_CRED SchannelCred; /* Schannel credential data */ | |
1887 | TimeStamp tsExpiry; /* Time stamp */ | |
1888 | SECURITY_STATUS Status; /* Status */ | |
1889 | HCRYPTKEY hKey = (HCRYPTKEY)NULL; /* Handle to crypto key */ | |
1890 | CRYPT_KEY_PROV_INFO kpi; /* Key container info */ | |
1891 | SYSTEMTIME et; /* System time */ | |
1892 | CERT_EXTENSIONS exts; /* Array of cert extensions */ | |
1893 | CRYPT_KEY_PROV_INFO ckp; /* Handle to crypto key */ | |
1894 | BOOL ok = TRUE; /* Return value */ | |
1895 | ||
1896 | ||
1897 | DEBUG_printf(("4http_sspi_make_credentials(sspi=%p, container=%p, common_name=\"%s\", mode=%d, years=%d)", sspi, container, common_name, mode, years)); | |
1898 | ||
1899 | if (!CryptAcquireContextW(&hProv, (LPWSTR)container, MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET)) | |
1900 | { | |
1901 | if (GetLastError() == NTE_EXISTS) | |
1902 | { | |
1903 | if (!CryptAcquireContextW(&hProv, (LPWSTR)container, MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET)) | |
1904 | { | |
1905 | DEBUG_printf(("5http_sspi_make_credentials: CryptAcquireContext failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1906 | ok = FALSE; | |
1907 | goto cleanup; | |
1908 | } | |
1909 | } | |
1910 | } | |
1911 | ||
1912 | 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"); | |
1913 | ||
1914 | if (!store) | |
1915 | { | |
1916 | DEBUG_printf(("5http_sspi_make_credentials: CertOpenSystemStore failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1917 | ok = FALSE; | |
1918 | goto cleanup; | |
1919 | } | |
1920 | ||
1921 | dwSize = 0; | |
1922 | ||
1923 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, NULL, &dwSize, NULL)) | |
1924 | { | |
1925 | DEBUG_printf(("5http_sspi_make_credentials: CertStrToName failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1926 | ok = FALSE; | |
1927 | goto cleanup; | |
1928 | } | |
1929 | ||
1930 | p = (PBYTE)malloc(dwSize); | |
1931 | ||
1932 | if (!p) | |
1933 | { | |
1934 | DEBUG_printf(("5http_sspi_make_credentials: malloc failed for %d bytes", dwSize)); | |
1935 | ok = FALSE; | |
1936 | goto cleanup; | |
1937 | } | |
1938 | ||
1939 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, p, &dwSize, NULL)) | |
1940 | { | |
1941 | DEBUG_printf(("5http_sspi_make_credentials: CertStrToName failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1942 | ok = FALSE; | |
1943 | goto cleanup; | |
1944 | } | |
1945 | ||
1946 | /* | |
1947 | * Create a private key and self-signed certificate... | |
1948 | */ | |
1949 | ||
1950 | if (!CryptGenKey(hProv, AT_KEYEXCHANGE, CRYPT_EXPORTABLE, &hKey)) | |
1951 | { | |
1952 | DEBUG_printf(("5http_sspi_make_credentials: CryptGenKey failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1953 | ok = FALSE; | |
1954 | goto cleanup; | |
1955 | } | |
1956 | ||
1957 | ZeroMemory(&kpi, sizeof(kpi)); | |
1958 | kpi.pwszContainerName = (LPWSTR)container; | |
1959 | kpi.pwszProvName = MS_DEF_PROV_W; | |
1960 | kpi.dwProvType = PROV_RSA_FULL; | |
1961 | kpi.dwFlags = CERT_SET_KEY_CONTEXT_PROP_ID; | |
1962 | kpi.dwKeySpec = AT_KEYEXCHANGE; | |
1963 | ||
1964 | GetSystemTime(&et); | |
1965 | et.wYear += years; | |
1966 | ||
1967 | ZeroMemory(&exts, sizeof(exts)); | |
1968 | ||
1969 | createdContext = CertCreateSelfSignCertificate(hProv, &sib, 0, &kpi, NULL, NULL, &et, &exts); | |
1970 | ||
1971 | if (!createdContext) | |
1972 | { | |
1973 | DEBUG_printf(("5http_sspi_make_credentials: CertCreateSelfSignCertificate failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1974 | ok = FALSE; | |
1975 | goto cleanup; | |
1976 | } | |
1977 | ||
1978 | /* | |
1979 | * Add the created context to the named store, and associate it with the named | |
1980 | * container... | |
1981 | */ | |
1982 | ||
1983 | if (!CertAddCertificateContextToStore(store, createdContext, CERT_STORE_ADD_REPLACE_EXISTING, &storedContext)) | |
1984 | { | |
1985 | DEBUG_printf(("5http_sspi_make_credentials: CertAddCertificateContextToStore failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1986 | ok = FALSE; | |
1987 | goto cleanup; | |
1988 | } | |
1989 | ||
1990 | ZeroMemory(&ckp, sizeof(ckp)); | |
1991 | ckp.pwszContainerName = (LPWSTR) container; | |
1992 | ckp.pwszProvName = MS_DEF_PROV_W; | |
1993 | ckp.dwProvType = PROV_RSA_FULL; | |
1994 | ckp.dwFlags = CRYPT_MACHINE_KEYSET; | |
1995 | ckp.dwKeySpec = AT_KEYEXCHANGE; | |
1996 | ||
1997 | if (!CertSetCertificateContextProperty(storedContext, CERT_KEY_PROV_INFO_PROP_ID, 0, &ckp)) | |
1998 | { | |
1999 | DEBUG_printf(("5http_sspi_make_credentials: CertSetCertificateContextProperty failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
2000 | ok = FALSE; | |
2001 | goto cleanup; | |
2002 | } | |
2003 | ||
2004 | /* | |
2005 | * Get a handle to use the certificate... | |
2006 | */ | |
2007 | ||
2008 | ZeroMemory(&SchannelCred, sizeof(SchannelCred)); | |
2009 | ||
2010 | SchannelCred.dwVersion = SCHANNEL_CRED_VERSION; | |
2011 | SchannelCred.cCreds = 1; | |
2012 | SchannelCred.paCred = &storedContext; | |
2013 | ||
2014 | /* | |
2015 | * SSPI doesn't seem to like it if grbitEnabledProtocols is set for a client. | |
2016 | */ | |
2017 | ||
2018 | if (mode == _HTTP_MODE_SERVER) | |
2019 | SchannelCred.grbitEnabledProtocols = SP_PROT_SSL3TLS1; | |
2020 | ||
2021 | /* | |
2022 | * Create an SSPI credential. | |
2023 | */ | |
2024 | ||
2025 | Status = AcquireCredentialsHandle(NULL, UNISP_NAME, mode == _HTTP_MODE_SERVER ? SECPKG_CRED_INBOUND : SECPKG_CRED_OUTBOUND, NULL, &SchannelCred, NULL, NULL, &sspi->creds, &tsExpiry); | |
2026 | if (Status != SEC_E_OK) | |
2027 | { | |
2028 | DEBUG_printf(("5http_sspi_make_credentials: AcquireCredentialsHandle failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), Status))); | |
2029 | ok = FALSE; | |
2030 | goto cleanup; | |
2031 | } | |
2032 | ||
2033 | cleanup: | |
2034 | ||
2035 | /* | |
2036 | * Cleanup | |
2037 | */ | |
2038 | ||
2039 | if (hKey) | |
2040 | CryptDestroyKey(hKey); | |
2041 | ||
2042 | if (createdContext) | |
2043 | CertFreeCertificateContext(createdContext); | |
2044 | ||
2045 | if (storedContext) | |
2046 | CertFreeCertificateContext(storedContext); | |
2047 | ||
2048 | if (p) | |
2049 | free(p); | |
2050 | ||
2051 | if (store) | |
2052 | CertCloseStore(store, 0); | |
2053 | ||
2054 | if (hProv) | |
2055 | CryptReleaseContext(hProv, 0); | |
2056 | ||
2057 | return (ok); | |
2058 | } | |
2059 | ||
2060 | ||
2061 | /* | |
2062 | * 'http_sspi_server()' - Negotiate a TLS connection as a server. | |
2063 | */ | |
2064 | ||
2065 | static int /* O - 0 on success, -1 on failure */ | |
2066 | http_sspi_server(http_t *http, /* I - HTTP connection */ | |
2067 | const char *hostname) /* I - Hostname of server */ | |
2068 | { | |
2069 | _http_sspi_t *sspi = http->tls; /* I - SSPI data */ | |
2070 | char common_name[512]; /* Common name for cert */ | |
2071 | DWORD dwSSPIFlags; /* SSL connection attributes we want */ | |
2072 | DWORD dwSSPIOutFlags; /* SSL connection attributes we got */ | |
2073 | TimeStamp tsExpiry; /* Time stamp */ | |
2074 | SECURITY_STATUS scRet; /* SSPI Status */ | |
2075 | SecBufferDesc inBuffer; /* Array of SecBuffer structs */ | |
2076 | SecBuffer inBuffers[2]; /* Security package buffer */ | |
2077 | SecBufferDesc outBuffer; /* Array of SecBuffer structs */ | |
2078 | SecBuffer outBuffers[1]; /* Security package buffer */ | |
2079 | int num = 0; /* 32 bit status value */ | |
2080 | BOOL fInitContext = TRUE; /* Has the context been init'd? */ | |
2081 | int ret = 0; /* Return value */ | |
2082 | ||
2083 | ||
2084 | DEBUG_printf(("4http_sspi_server(http=%p, hostname=\"%s\")", http, hostname)); | |
2085 | ||
2086 | dwSSPIFlags = ASC_REQ_SEQUENCE_DETECT | | |
2087 | ASC_REQ_REPLAY_DETECT | | |
2088 | ASC_REQ_CONFIDENTIALITY | | |
2089 | ASC_REQ_EXTENDED_ERROR | | |
2090 | ASC_REQ_ALLOCATE_MEMORY | | |
2091 | ASC_REQ_STREAM; | |
2092 | ||
2093 | sspi->decryptBufferUsed = 0; | |
2094 | ||
2095 | /* | |
2096 | * Lookup the server certificate... | |
2097 | */ | |
2098 | ||
2099 | snprintf(common_name, sizeof(common_name), "CN=%s", hostname); | |
2100 | ||
2101 | if (!http_sspi_find_credentials(http, L"ServerContainer", common_name)) | |
2102 | if (!http_sspi_make_credentials(http->tls, L"ServerContainer", common_name, _HTTP_MODE_SERVER, 10)) | |
2103 | { | |
2104 | DEBUG_puts("5http_sspi_server: Unable to get server credentials."); | |
2105 | return (-1); | |
2106 | } | |
2107 | ||
2108 | /* | |
2109 | * Set OutBuffer for AcceptSecurityContext call | |
2110 | */ | |
2111 | ||
2112 | outBuffer.cBuffers = 1; | |
2113 | outBuffer.pBuffers = outBuffers; | |
2114 | outBuffer.ulVersion = SECBUFFER_VERSION; | |
2115 | ||
2116 | scRet = SEC_I_CONTINUE_NEEDED; | |
2117 | ||
2118 | while (scRet == SEC_I_CONTINUE_NEEDED || | |
2119 | scRet == SEC_E_INCOMPLETE_MESSAGE || | |
2120 | scRet == SEC_I_INCOMPLETE_CREDENTIALS) | |
2121 | { | |
2122 | if (sspi->decryptBufferUsed == 0 || scRet == SEC_E_INCOMPLETE_MESSAGE) | |
2123 | { | |
2124 | if (sspi->decryptBufferLength <= sspi->decryptBufferUsed) | |
2125 | { | |
2126 | BYTE *temp; /* New buffer */ | |
2127 | ||
2128 | if (sspi->decryptBufferLength >= 262144) | |
2129 | { | |
2130 | WSASetLastError(E_OUTOFMEMORY); | |
2131 | DEBUG_puts("5http_sspi_server: Decryption buffer too large (>256k)"); | |
2132 | return (-1); | |
2133 | } | |
2134 | ||
2135 | if ((temp = realloc(sspi->decryptBuffer, sspi->decryptBufferLength + 4096)) == NULL) | |
2136 | { | |
2137 | DEBUG_printf(("5http_sspi_server: Unable to allocate %d byte buffer.", sspi->decryptBufferLength + 4096)); | |
2138 | WSASetLastError(E_OUTOFMEMORY); | |
2139 | return (-1); | |
2140 | } | |
2141 | ||
2142 | sspi->decryptBufferLength += 4096; | |
2143 | sspi->decryptBuffer = temp; | |
2144 | } | |
2145 | ||
2146 | for (;;) | |
2147 | { | |
2148 | num = recv(http->fd, sspi->decryptBuffer + sspi->decryptBufferUsed, (int)(sspi->decryptBufferLength - sspi->decryptBufferUsed), 0); | |
2149 | ||
2150 | if (num == -1 && WSAGetLastError() == WSAEWOULDBLOCK) | |
2151 | Sleep(1); | |
2152 | else | |
2153 | break; | |
2154 | } | |
2155 | ||
2156 | if (num < 0) | |
2157 | { | |
2158 | DEBUG_printf(("5http_sspi_server: recv failed: %d", WSAGetLastError())); | |
2159 | return (-1); | |
2160 | } | |
2161 | else if (num == 0) | |
2162 | { | |
2163 | DEBUG_puts("5http_sspi_server: client disconnected"); | |
2164 | return (-1); | |
2165 | } | |
2166 | ||
2167 | DEBUG_printf(("5http_sspi_server: received %d (handshake) bytes from client.", num)); | |
2168 | sspi->decryptBufferUsed += num; | |
2169 | } | |
2170 | ||
2171 | /* | |
2172 | * InBuffers[1] is for getting extra data that SSPI/SCHANNEL doesn't process | |
2173 | * on this run around the loop. | |
2174 | */ | |
2175 | ||
2176 | inBuffers[0].pvBuffer = sspi->decryptBuffer; | |
2177 | inBuffers[0].cbBuffer = (unsigned long)sspi->decryptBufferUsed; | |
2178 | inBuffers[0].BufferType = SECBUFFER_TOKEN; | |
2179 | ||
2180 | inBuffers[1].pvBuffer = NULL; | |
2181 | inBuffers[1].cbBuffer = 0; | |
2182 | inBuffers[1].BufferType = SECBUFFER_EMPTY; | |
2183 | ||
2184 | inBuffer.cBuffers = 2; | |
2185 | inBuffer.pBuffers = inBuffers; | |
2186 | inBuffer.ulVersion = SECBUFFER_VERSION; | |
2187 | ||
2188 | /* | |
2189 | * Initialize these so if we fail, pvBuffer contains NULL, so we don't try to | |
2190 | * free random garbage at the quit. | |
2191 | */ | |
2192 | ||
2193 | outBuffers[0].pvBuffer = NULL; | |
2194 | outBuffers[0].BufferType = SECBUFFER_TOKEN; | |
2195 | outBuffers[0].cbBuffer = 0; | |
2196 | ||
2197 | scRet = AcceptSecurityContext(&sspi->creds, (fInitContext?NULL:&sspi->context), &inBuffer, dwSSPIFlags, SECURITY_NATIVE_DREP, (fInitContext?&sspi->context:NULL), &outBuffer, &dwSSPIOutFlags, &tsExpiry); | |
2198 | ||
2199 | fInitContext = FALSE; | |
2200 | ||
2201 | if (scRet == SEC_E_OK || | |
2202 | scRet == SEC_I_CONTINUE_NEEDED || | |
2203 | (FAILED(scRet) && ((dwSSPIOutFlags & ISC_RET_EXTENDED_ERROR) != 0))) | |
2204 | { | |
2205 | if (outBuffers[0].cbBuffer && outBuffers[0].pvBuffer) | |
2206 | { | |
2207 | /* | |
2208 | * Send response to server if there is one. | |
2209 | */ | |
2210 | ||
2211 | num = send(http->fd, outBuffers[0].pvBuffer, outBuffers[0].cbBuffer, 0); | |
2212 | ||
2213 | if (num <= 0) | |
2214 | { | |
2215 | DEBUG_printf(("5http_sspi_server: handshake send failed: %d", WSAGetLastError())); | |
2216 | return (-1); | |
2217 | } | |
2218 | ||
2219 | DEBUG_printf(("5http_sspi_server: sent %d handshake bytes to client.", outBuffers[0].cbBuffer)); | |
2220 | ||
2221 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
2222 | outBuffers[0].pvBuffer = NULL; | |
2223 | } | |
2224 | } | |
2225 | ||
2226 | if (scRet == SEC_E_OK) | |
2227 | { | |
2228 | /* | |
2229 | * If there's extra data then save it for next time we go to decrypt. | |
2230 | */ | |
2231 | ||
2232 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
2233 | { | |
2234 | memcpy(sspi->decryptBuffer, (LPBYTE)(sspi->decryptBuffer + sspi->decryptBufferUsed - inBuffers[1].cbBuffer), inBuffers[1].cbBuffer); | |
2235 | sspi->decryptBufferUsed = inBuffers[1].cbBuffer; | |
2236 | } | |
2237 | else | |
2238 | { | |
2239 | sspi->decryptBufferUsed = 0; | |
2240 | } | |
2241 | break; | |
2242 | } | |
2243 | else if (FAILED(scRet) && scRet != SEC_E_INCOMPLETE_MESSAGE) | |
2244 | { | |
2245 | DEBUG_printf(("5http_sspi_server: AcceptSecurityContext failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
2246 | ret = -1; | |
2247 | break; | |
2248 | } | |
2249 | ||
2250 | if (scRet != SEC_E_INCOMPLETE_MESSAGE && | |
2251 | scRet != SEC_I_INCOMPLETE_CREDENTIALS) | |
2252 | { | |
2253 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
2254 | { | |
2255 | memcpy(sspi->decryptBuffer, (LPBYTE)(sspi->decryptBuffer + sspi->decryptBufferUsed - inBuffers[1].cbBuffer), inBuffers[1].cbBuffer); | |
2256 | sspi->decryptBufferUsed = inBuffers[1].cbBuffer; | |
2257 | } | |
2258 | else | |
2259 | { | |
2260 | sspi->decryptBufferUsed = 0; | |
2261 | } | |
2262 | } | |
2263 | } | |
2264 | ||
2265 | if (!ret) | |
2266 | { | |
2267 | sspi->contextInitialized = TRUE; | |
2268 | ||
2269 | /* | |
2270 | * Find out how big the header will be: | |
2271 | */ | |
2272 | ||
2273 | scRet = QueryContextAttributes(&sspi->context, SECPKG_ATTR_STREAM_SIZES, &sspi->streamSizes); | |
2274 | ||
2275 | if (scRet != SEC_E_OK) | |
2276 | { | |
2277 | DEBUG_printf(("5http_sspi_server: QueryContextAttributes failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
2278 | ret = -1; | |
2279 | } | |
2280 | } | |
2281 | ||
2282 | return (ret); | |
2283 | } | |
2284 | ||
2285 | ||
2286 | /* | |
2287 | * 'http_sspi_strerror()' - Return a string for the specified error code. | |
2288 | */ | |
2289 | ||
2290 | static const char * /* O - String for error */ | |
2291 | http_sspi_strerror(char *buffer, /* I - Error message buffer */ | |
2292 | size_t bufsize, /* I - Size of buffer */ | |
2293 | DWORD code) /* I - Error code */ | |
2294 | { | |
2295 | if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, code, 0, buffer, bufsize, NULL)) | |
2296 | { | |
2297 | /* | |
2298 | * Strip trailing CR + LF... | |
2299 | */ | |
2300 | ||
2301 | char *ptr; /* Pointer into error message */ | |
2302 | ||
2303 | for (ptr = buffer + strlen(buffer) - 1; ptr >= buffer; ptr --) | |
2304 | if (*ptr == '\n' || *ptr == '\r') | |
2305 | *ptr = '\0'; | |
2306 | else | |
2307 | break; | |
2308 | } | |
2309 | else | |
2310 | snprintf(buffer, bufsize, "Unknown error %x", code); | |
2311 | ||
2312 | return (buffer); | |
2313 | } | |
2314 | ||
2315 | ||
2316 | /* | |
2317 | * 'http_sspi_verify()' - Verify a certificate. | |
2318 | */ | |
2319 | ||
2320 | static DWORD /* O - Error code (0 == No error) */ | |
2321 | http_sspi_verify( | |
2322 | PCCERT_CONTEXT cert, /* I - Server certificate */ | |
2323 | const char *common_name, /* I - Common name */ | |
2324 | DWORD dwCertFlags) /* I - Verification flags */ | |
2325 | { | |
2326 | HTTPSPolicyCallbackData httpsPolicy; /* HTTPS Policy Struct */ | |
2327 | CERT_CHAIN_POLICY_PARA policyPara; /* Cert chain policy parameters */ | |
2328 | CERT_CHAIN_POLICY_STATUS policyStatus;/* Cert chain policy status */ | |
2329 | CERT_CHAIN_PARA chainPara; /* Used for searching and matching criteria */ | |
2330 | PCCERT_CHAIN_CONTEXT chainContext = NULL; | |
2331 | /* Certificate chain */ | |
2332 | PWSTR commonNameUnicode = NULL; | |
2333 | /* Unicode common name */ | |
2334 | LPSTR rgszUsages[] = { szOID_PKIX_KP_SERVER_AUTH, | |
2335 | szOID_SERVER_GATED_CRYPTO, | |
2336 | szOID_SGC_NETSCAPE }; | |
2337 | /* How are we using this certificate? */ | |
2338 | DWORD cUsages = sizeof(rgszUsages) / sizeof(LPSTR); | |
2339 | /* Number of ites in rgszUsages */ | |
2340 | DWORD count; /* 32 bit count variable */ | |
2341 | DWORD status; /* Return value */ | |
2342 | #ifdef DEBUG | |
2343 | char error[1024]; /* Error message string */ | |
2344 | #endif /* DEBUG */ | |
2345 | ||
2346 | ||
2347 | if (!cert) | |
2348 | return (SEC_E_WRONG_PRINCIPAL); | |
2349 | ||
2350 | /* | |
2351 | * Convert common name to Unicode. | |
2352 | */ | |
2353 | ||
2354 | if (!common_name || !*common_name) | |
2355 | return (SEC_E_WRONG_PRINCIPAL); | |
2356 | ||
2357 | count = MultiByteToWideChar(CP_ACP, 0, common_name, -1, NULL, 0); | |
2358 | commonNameUnicode = LocalAlloc(LMEM_FIXED, count * sizeof(WCHAR)); | |
2359 | if (!commonNameUnicode) | |
2360 | return (SEC_E_INSUFFICIENT_MEMORY); | |
2361 | ||
2362 | if (!MultiByteToWideChar(CP_ACP, 0, common_name, -1, commonNameUnicode, count)) | |
2363 | { | |
2364 | LocalFree(commonNameUnicode); | |
2365 | return (SEC_E_WRONG_PRINCIPAL); | |
2366 | } | |
2367 | ||
2368 | /* | |
2369 | * Build certificate chain. | |
2370 | */ | |
2371 | ||
2372 | ZeroMemory(&chainPara, sizeof(chainPara)); | |
2373 | ||
2374 | chainPara.cbSize = sizeof(chainPara); | |
2375 | chainPara.RequestedUsage.dwType = USAGE_MATCH_TYPE_OR; | |
2376 | chainPara.RequestedUsage.Usage.cUsageIdentifier = cUsages; | |
2377 | chainPara.RequestedUsage.Usage.rgpszUsageIdentifier = rgszUsages; | |
2378 | ||
2379 | if (!CertGetCertificateChain(NULL, cert, NULL, cert->hCertStore, &chainPara, 0, NULL, &chainContext)) | |
2380 | { | |
2381 | status = GetLastError(); | |
2382 | ||
2383 | DEBUG_printf(("CertGetCertificateChain returned: %s", http_sspi_strerror(error, sizeof(error), status))); | |
2384 | ||
2385 | LocalFree(commonNameUnicode); | |
2386 | return (status); | |
2387 | } | |
2388 | ||
2389 | /* | |
2390 | * Validate certificate chain. | |
2391 | */ | |
2392 | ||
2393 | ZeroMemory(&httpsPolicy, sizeof(HTTPSPolicyCallbackData)); | |
2394 | httpsPolicy.cbStruct = sizeof(HTTPSPolicyCallbackData); | |
2395 | httpsPolicy.dwAuthType = AUTHTYPE_SERVER; | |
2396 | httpsPolicy.fdwChecks = dwCertFlags; | |
2397 | httpsPolicy.pwszServerName = commonNameUnicode; | |
2398 | ||
2399 | memset(&policyPara, 0, sizeof(policyPara)); | |
2400 | policyPara.cbSize = sizeof(policyPara); | |
2401 | policyPara.pvExtraPolicyPara = &httpsPolicy; | |
2402 | ||
2403 | memset(&policyStatus, 0, sizeof(policyStatus)); | |
2404 | policyStatus.cbSize = sizeof(policyStatus); | |
2405 | ||
2406 | if (!CertVerifyCertificateChainPolicy(CERT_CHAIN_POLICY_SSL, chainContext, &policyPara, &policyStatus)) | |
2407 | { | |
2408 | status = GetLastError(); | |
2409 | ||
2410 | DEBUG_printf(("CertVerifyCertificateChainPolicy returned %s", http_sspi_strerror(error, sizeof(error), status))); | |
2411 | } | |
2412 | else if (policyStatus.dwError) | |
2413 | status = policyStatus.dwError; | |
2414 | else | |
2415 | status = SEC_E_OK; | |
2416 | ||
2417 | if (chainContext) | |
2418 | CertFreeCertificateChain(chainContext); | |
2419 | ||
2420 | if (commonNameUnicode) | |
2421 | LocalFree(commonNameUnicode); | |
2422 | ||
2423 | return (status); | |
2424 | } |