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1 | /* | |
2 | * TLS support for CUPS on Windows using the Security Support Provider | |
3 | * Interface (SSPI). | |
4 | * | |
5 | * Copyright 2010-2017 by Apple Inc. | |
6 | * | |
7 | * Licensed under Apache License v2.0. See the file "LICENSE" for more information. | |
8 | */ | |
9 | ||
10 | /**** This file is included from tls.c ****/ | |
11 | ||
12 | /* | |
13 | * Include necessary headers... | |
14 | */ | |
15 | ||
16 | #include "debug-private.h" | |
17 | ||
18 | ||
19 | /* | |
20 | * Include necessary libraries... | |
21 | */ | |
22 | ||
23 | #pragma comment(lib, "Crypt32.lib") | |
24 | #pragma comment(lib, "Secur32.lib") | |
25 | #pragma comment(lib, "Ws2_32.lib") | |
26 | ||
27 | ||
28 | /* | |
29 | * Constants... | |
30 | */ | |
31 | ||
32 | #ifndef SECURITY_FLAG_IGNORE_UNKNOWN_CA | |
33 | # define SECURITY_FLAG_IGNORE_UNKNOWN_CA 0x00000100 /* Untrusted root */ | |
34 | #endif /* SECURITY_FLAG_IGNORE_UNKNOWN_CA */ | |
35 | ||
36 | #ifndef SECURITY_FLAG_IGNORE_CERT_CN_INVALID | |
37 | # define SECURITY_FLAG_IGNORE_CERT_CN_INVALID 0x00001000 /* Common name does not match */ | |
38 | #endif /* !SECURITY_FLAG_IGNORE_CERT_CN_INVALID */ | |
39 | ||
40 | #ifndef SECURITY_FLAG_IGNORE_CERT_DATE_INVALID | |
41 | # define SECURITY_FLAG_IGNORE_CERT_DATE_INVALID 0x00002000 /* Expired X509 Cert. */ | |
42 | #endif /* !SECURITY_FLAG_IGNORE_CERT_DATE_INVALID */ | |
43 | ||
44 | ||
45 | /* | |
46 | * Local globals... | |
47 | */ | |
48 | ||
49 | static int tls_options = -1,/* Options for TLS connections */ | |
50 | tls_min_version = _HTTP_TLS_1_0, | |
51 | tls_max_version = _HTTP_TLS_MAX; | |
52 | ||
53 | ||
54 | /* | |
55 | * Local functions... | |
56 | */ | |
57 | ||
58 | static _http_sspi_t *http_sspi_alloc(void); | |
59 | static int http_sspi_client(http_t *http, const char *hostname); | |
60 | static PCCERT_CONTEXT http_sspi_create_credential(http_credential_t *cred); | |
61 | static BOOL http_sspi_find_credentials(http_t *http, const LPWSTR containerName, const char *common_name); | |
62 | static void http_sspi_free(_http_sspi_t *sspi); | |
63 | static BOOL http_sspi_make_credentials(_http_sspi_t *sspi, const LPWSTR containerName, const char *common_name, _http_mode_t mode, int years); | |
64 | static int http_sspi_server(http_t *http, const char *hostname); | |
65 | static void http_sspi_set_allows_any_root(_http_sspi_t *sspi, BOOL allow); | |
66 | static void http_sspi_set_allows_expired_certs(_http_sspi_t *sspi, BOOL allow); | |
67 | static const char *http_sspi_strerror(char *buffer, size_t bufsize, DWORD code); | |
68 | static DWORD http_sspi_verify(PCCERT_CONTEXT cert, const char *common_name, DWORD dwCertFlags); | |
69 | ||
70 | ||
71 | /* | |
72 | * 'cupsMakeServerCredentials()' - Make a self-signed certificate and private key pair. | |
73 | * | |
74 | * @since CUPS 2.0/OS 10.10@ | |
75 | */ | |
76 | ||
77 | int /* O - 1 on success, 0 on failure */ | |
78 | cupsMakeServerCredentials( | |
79 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
80 | const char *common_name, /* I - Common name */ | |
81 | int num_alt_names, /* I - Number of subject alternate names */ | |
82 | const char **alt_names, /* I - Subject Alternate Names */ | |
83 | time_t expiration_date) /* I - Expiration date */ | |
84 | { | |
85 | _http_sspi_t *sspi; /* SSPI data */ | |
86 | int ret; /* Return value */ | |
87 | ||
88 | ||
89 | 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)); | |
90 | ||
91 | (void)path; | |
92 | (void)num_alt_names; | |
93 | (void)alt_names; | |
94 | ||
95 | sspi = http_sspi_alloc(); | |
96 | ret = http_sspi_make_credentials(sspi, L"ServerContainer", common_name, _HTTP_MODE_SERVER, (int)((expiration_date - time(NULL) + 86399) / 86400 / 365)); | |
97 | ||
98 | http_sspi_free(sspi); | |
99 | ||
100 | return (ret); | |
101 | } | |
102 | ||
103 | ||
104 | /* | |
105 | * 'cupsSetServerCredentials()' - Set the default server credentials. | |
106 | * | |
107 | * Note: The server credentials are used by all threads in the running process. | |
108 | * This function is threadsafe. | |
109 | * | |
110 | * @since CUPS 2.0/OS 10.10@ | |
111 | */ | |
112 | ||
113 | int /* O - 1 on success, 0 on failure */ | |
114 | cupsSetServerCredentials( | |
115 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
116 | const char *common_name, /* I - Default common name for server */ | |
117 | int auto_create) /* I - 1 = automatically create self-signed certificates */ | |
118 | { | |
119 | DEBUG_printf(("cupsSetServerCredentials(path=\"%s\", common_name=\"%s\", auto_create=%d)", path, common_name, auto_create)); | |
120 | ||
121 | (void)path; | |
122 | (void)common_name; | |
123 | (void)auto_create; | |
124 | ||
125 | return (0); | |
126 | } | |
127 | ||
128 | ||
129 | /* | |
130 | * 'httpCopyCredentials()' - Copy the credentials associated with the peer in | |
131 | * an encrypted connection. | |
132 | * | |
133 | * @since CUPS 1.5/macOS 10.7@ | |
134 | */ | |
135 | ||
136 | int /* O - Status of call (0 = success) */ | |
137 | httpCopyCredentials( | |
138 | http_t *http, /* I - Connection to server */ | |
139 | cups_array_t **credentials) /* O - Array of credentials */ | |
140 | { | |
141 | DEBUG_printf(("httpCopyCredentials(http=%p, credentials=%p)", http, credentials)); | |
142 | ||
143 | if (!http || !http->tls || !http->tls->remoteCert || !credentials) | |
144 | { | |
145 | if (credentials) | |
146 | *credentials = NULL; | |
147 | ||
148 | return (-1); | |
149 | } | |
150 | ||
151 | *credentials = cupsArrayNew(NULL, NULL); | |
152 | httpAddCredential(*credentials, http->tls->remoteCert->pbCertEncoded, http->tls->remoteCert->cbCertEncoded); | |
153 | ||
154 | return (0); | |
155 | } | |
156 | ||
157 | ||
158 | /* | |
159 | * '_httpCreateCredentials()' - Create credentials in the internal format. | |
160 | */ | |
161 | ||
162 | http_tls_credentials_t /* O - Internal credentials */ | |
163 | _httpCreateCredentials( | |
164 | cups_array_t *credentials) /* I - Array of credentials */ | |
165 | { | |
166 | return (http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials))); | |
167 | } | |
168 | ||
169 | ||
170 | /* | |
171 | * 'httpCredentialsAreValidForName()' - Return whether the credentials are valid for the given name. | |
172 | * | |
173 | * @since CUPS 2.0/OS 10.10@ | |
174 | */ | |
175 | ||
176 | int /* O - 1 if valid, 0 otherwise */ | |
177 | httpCredentialsAreValidForName( | |
178 | cups_array_t *credentials, /* I - Credentials */ | |
179 | const char *common_name) /* I - Name to check */ | |
180 | { | |
181 | int valid = 1; /* Valid name? */ | |
182 | PCCERT_CONTEXT cert = http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
183 | /* Certificate */ | |
184 | char cert_name[1024]; /* Name from certificate */ | |
185 | ||
186 | ||
187 | if (cert) | |
188 | { | |
189 | if (CertNameToStr(X509_ASN_ENCODING, &(cert->pCertInfo->Subject), CERT_SIMPLE_NAME_STR, cert_name, sizeof(cert_name))) | |
190 | { | |
191 | /* | |
192 | * Extract common name at end... | |
193 | */ | |
194 | ||
195 | char *ptr = strrchr(cert_name, ','); | |
196 | if (ptr && ptr[1]) | |
197 | _cups_strcpy(cert_name, ptr + 2); | |
198 | } | |
199 | else | |
200 | strlcpy(cert_name, "unknown", sizeof(cert_name)); | |
201 | ||
202 | CertFreeCertificateContext(cert); | |
203 | } | |
204 | else | |
205 | strlcpy(cert_name, "unknown", sizeof(cert_name)); | |
206 | ||
207 | /* | |
208 | * Compare the common names... | |
209 | */ | |
210 | ||
211 | if (_cups_strcasecmp(common_name, cert_name)) | |
212 | { | |
213 | /* | |
214 | * Not an exact match for the common name, check for wildcard certs... | |
215 | */ | |
216 | ||
217 | const char *domain = strchr(common_name, '.'); | |
218 | /* Domain in common name */ | |
219 | ||
220 | if (strncmp(cert_name, "*.", 2) || !domain || _cups_strcasecmp(domain, cert_name + 1)) | |
221 | { | |
222 | /* | |
223 | * Not a wildcard match. | |
224 | */ | |
225 | ||
226 | /* TODO: Check subject alternate names */ | |
227 | valid = 0; | |
228 | } | |
229 | } | |
230 | ||
231 | return (valid); | |
232 | } | |
233 | ||
234 | ||
235 | /* | |
236 | * 'httpCredentialsGetTrust()' - Return the trust of credentials. | |
237 | * | |
238 | * @since CUPS 2.0/OS 10.10@ | |
239 | */ | |
240 | ||
241 | http_trust_t /* O - Level of trust */ | |
242 | httpCredentialsGetTrust( | |
243 | cups_array_t *credentials, /* I - Credentials */ | |
244 | const char *common_name) /* I - Common name for trust lookup */ | |
245 | { | |
246 | http_trust_t trust = HTTP_TRUST_OK; /* Level of trust */ | |
247 | PCCERT_CONTEXT cert = NULL; /* Certificate to validate */ | |
248 | DWORD certFlags = 0; /* Cert verification flags */ | |
249 | _cups_globals_t *cg = _cupsGlobals(); /* Per-thread global data */ | |
250 | ||
251 | ||
252 | if (!common_name) | |
253 | return (HTTP_TRUST_UNKNOWN); | |
254 | ||
255 | cert = http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
256 | if (!cert) | |
257 | return (HTTP_TRUST_UNKNOWN); | |
258 | ||
259 | if (cg->any_root < 0) | |
260 | _cupsSetDefaults(); | |
261 | ||
262 | if (cg->any_root) | |
263 | certFlags |= SECURITY_FLAG_IGNORE_UNKNOWN_CA; | |
264 | ||
265 | if (cg->expired_certs) | |
266 | certFlags |= SECURITY_FLAG_IGNORE_CERT_DATE_INVALID; | |
267 | ||
268 | if (!cg->validate_certs) | |
269 | certFlags |= SECURITY_FLAG_IGNORE_CERT_CN_INVALID; | |
270 | ||
271 | if (http_sspi_verify(cert, common_name, certFlags) != SEC_E_OK) | |
272 | trust = HTTP_TRUST_INVALID; | |
273 | ||
274 | CertFreeCertificateContext(cert); | |
275 | ||
276 | return (trust); | |
277 | } | |
278 | ||
279 | ||
280 | /* | |
281 | * 'httpCredentialsGetExpiration()' - Return the expiration date of the credentials. | |
282 | * | |
283 | * @since CUPS 2.0/OS 10.10@ | |
284 | */ | |
285 | ||
286 | time_t /* O - Expiration date of credentials */ | |
287 | httpCredentialsGetExpiration( | |
288 | cups_array_t *credentials) /* I - Credentials */ | |
289 | { | |
290 | time_t expiration_date = 0; /* Expiration data of credentials */ | |
291 | PCCERT_CONTEXT cert = http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
292 | /* Certificate */ | |
293 | ||
294 | if (cert) | |
295 | { | |
296 | SYSTEMTIME systime; /* System time */ | |
297 | struct tm tm; /* UNIX date/time */ | |
298 | ||
299 | FileTimeToSystemTime(&(cert->pCertInfo->NotAfter), &systime); | |
300 | ||
301 | tm.tm_year = systime.wYear - 1900; | |
302 | tm.tm_mon = systime.wMonth - 1; | |
303 | tm.tm_mday = systime.wDay; | |
304 | tm.tm_hour = systime.wHour; | |
305 | tm.tm_min = systime.wMinute; | |
306 | tm.tm_sec = systime.wSecond; | |
307 | ||
308 | expiration_date = mktime(&tm); | |
309 | ||
310 | CertFreeCertificateContext(cert); | |
311 | } | |
312 | ||
313 | return (expiration_date); | |
314 | } | |
315 | ||
316 | ||
317 | /* | |
318 | * 'httpCredentialsString()' - Return a string representing the credentials. | |
319 | * | |
320 | * @since CUPS 2.0/OS 10.10@ | |
321 | */ | |
322 | ||
323 | size_t /* O - Total size of credentials string */ | |
324 | httpCredentialsString( | |
325 | cups_array_t *credentials, /* I - Credentials */ | |
326 | char *buffer, /* I - Buffer or @code NULL@ */ | |
327 | size_t bufsize) /* I - Size of buffer */ | |
328 | { | |
329 | http_credential_t *first = (http_credential_t *)cupsArrayFirst(credentials); | |
330 | /* First certificate */ | |
331 | PCCERT_CONTEXT cert; /* Certificate */ | |
332 | ||
333 | ||
334 | DEBUG_printf(("httpCredentialsString(credentials=%p, buffer=%p, bufsize=" CUPS_LLFMT ")", credentials, buffer, CUPS_LLCAST bufsize)); | |
335 | ||
336 | if (!buffer) | |
337 | return (0); | |
338 | ||
339 | if (buffer && bufsize > 0) | |
340 | *buffer = '\0'; | |
341 | ||
342 | cert = http_sspi_create_credential(first); | |
343 | ||
344 | if (cert) | |
345 | { | |
346 | char cert_name[256]; /* Common name */ | |
347 | SYSTEMTIME systime; /* System time */ | |
348 | struct tm tm; /* UNIX date/time */ | |
349 | time_t expiration; /* Expiration date of cert */ | |
350 | unsigned char md5_digest[16]; /* MD5 result */ | |
351 | ||
352 | FileTimeToSystemTime(&(cert->pCertInfo->NotAfter), &systime); | |
353 | ||
354 | tm.tm_year = systime.wYear - 1900; | |
355 | tm.tm_mon = systime.wMonth - 1; | |
356 | tm.tm_mday = systime.wDay; | |
357 | tm.tm_hour = systime.wHour; | |
358 | tm.tm_min = systime.wMinute; | |
359 | tm.tm_sec = systime.wSecond; | |
360 | ||
361 | expiration = mktime(&tm); | |
362 | ||
363 | if (CertNameToStr(X509_ASN_ENCODING, &(cert->pCertInfo->Subject), CERT_SIMPLE_NAME_STR, cert_name, sizeof(cert_name))) | |
364 | { | |
365 | /* | |
366 | * Extract common name at end... | |
367 | */ | |
368 | ||
369 | char *ptr = strrchr(cert_name, ','); | |
370 | if (ptr && ptr[1]) | |
371 | _cups_strcpy(cert_name, ptr + 2); | |
372 | } | |
373 | else | |
374 | strlcpy(cert_name, "unknown", sizeof(cert_name)); | |
375 | ||
376 | cupsHashData("md5", first->data, first->datalen, md5_digest, sizeof(md5_digest)); | |
377 | ||
378 | 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]); | |
379 | ||
380 | CertFreeCertificateContext(cert); | |
381 | } | |
382 | ||
383 | DEBUG_printf(("1httpCredentialsString: Returning \"%s\".", buffer)); | |
384 | ||
385 | return (strlen(buffer)); | |
386 | } | |
387 | ||
388 | ||
389 | /* | |
390 | * '_httpFreeCredentials()' - Free internal credentials. | |
391 | */ | |
392 | ||
393 | void | |
394 | _httpFreeCredentials( | |
395 | http_tls_credentials_t credentials) /* I - Internal credentials */ | |
396 | { | |
397 | if (!credentials) | |
398 | return; | |
399 | ||
400 | CertFreeCertificateContext(credentials); | |
401 | } | |
402 | ||
403 | ||
404 | /* | |
405 | * 'httpLoadCredentials()' - Load X.509 credentials from a keychain file. | |
406 | * | |
407 | * @since CUPS 2.0/OS 10.10@ | |
408 | */ | |
409 | ||
410 | int /* O - 0 on success, -1 on error */ | |
411 | httpLoadCredentials( | |
412 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
413 | cups_array_t **credentials, /* IO - Credentials */ | |
414 | const char *common_name) /* I - Common name for credentials */ | |
415 | { | |
416 | HCERTSTORE store = NULL; /* Certificate store */ | |
417 | PCCERT_CONTEXT storedContext = NULL; /* Context created from the store */ | |
418 | DWORD dwSize = 0; /* 32 bit size */ | |
419 | PBYTE p = NULL; /* Temporary storage */ | |
420 | HCRYPTPROV hProv = (HCRYPTPROV)NULL; | |
421 | /* Handle to a CSP */ | |
422 | CERT_NAME_BLOB sib; /* Arbitrary array of bytes */ | |
423 | #ifdef DEBUG | |
424 | char error[1024]; /* Error message buffer */ | |
425 | #endif /* DEBUG */ | |
426 | ||
427 | ||
428 | DEBUG_printf(("httpLoadCredentials(path=\"%s\", credentials=%p, common_name=\"%s\")", path, credentials, common_name)); | |
429 | ||
430 | (void)path; | |
431 | ||
432 | if (credentials) | |
433 | { | |
434 | *credentials = NULL; | |
435 | } | |
436 | else | |
437 | { | |
438 | DEBUG_puts("1httpLoadCredentials: NULL credentials pointer, returning -1."); | |
439 | return (-1); | |
440 | } | |
441 | ||
442 | if (!common_name) | |
443 | { | |
444 | DEBUG_puts("1httpLoadCredentials: Bad common name, returning -1."); | |
445 | return (-1); | |
446 | } | |
447 | ||
448 | if (!CryptAcquireContextW(&hProv, L"RememberedContainer", MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET)) | |
449 | { | |
450 | if (GetLastError() == NTE_EXISTS) | |
451 | { | |
452 | if (!CryptAcquireContextW(&hProv, L"RememberedContainer", MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET)) | |
453 | { | |
454 | DEBUG_printf(("1httpLoadCredentials: CryptAcquireContext failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
455 | goto cleanup; | |
456 | } | |
457 | } | |
458 | } | |
459 | ||
460 | 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"); | |
461 | ||
462 | if (!store) | |
463 | { | |
464 | DEBUG_printf(("1httpLoadCredentials: CertOpenSystemStore failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
465 | goto cleanup; | |
466 | } | |
467 | ||
468 | dwSize = 0; | |
469 | ||
470 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, NULL, &dwSize, NULL)) | |
471 | { | |
472 | DEBUG_printf(("1httpLoadCredentials: CertStrToName failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
473 | goto cleanup; | |
474 | } | |
475 | ||
476 | p = (PBYTE)malloc(dwSize); | |
477 | ||
478 | if (!p) | |
479 | { | |
480 | DEBUG_printf(("1httpLoadCredentials: malloc failed for %d bytes.", dwSize)); | |
481 | goto cleanup; | |
482 | } | |
483 | ||
484 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, p, &dwSize, NULL)) | |
485 | { | |
486 | DEBUG_printf(("1httpLoadCredentials: CertStrToName failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
487 | goto cleanup; | |
488 | } | |
489 | ||
490 | sib.cbData = dwSize; | |
491 | sib.pbData = p; | |
492 | ||
493 | storedContext = CertFindCertificateInStore(store, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, 0, CERT_FIND_SUBJECT_NAME, &sib, NULL); | |
494 | ||
495 | if (!storedContext) | |
496 | { | |
497 | DEBUG_printf(("1httpLoadCredentials: Unable to find credentials for \"%s\".", common_name)); | |
498 | goto cleanup; | |
499 | } | |
500 | ||
501 | *credentials = cupsArrayNew(NULL, NULL); | |
502 | httpAddCredential(*credentials, storedContext->pbCertEncoded, storedContext->cbCertEncoded); | |
503 | ||
504 | cleanup: | |
505 | ||
506 | /* | |
507 | * Cleanup | |
508 | */ | |
509 | ||
510 | if (storedContext) | |
511 | CertFreeCertificateContext(storedContext); | |
512 | ||
513 | if (p) | |
514 | free(p); | |
515 | ||
516 | if (store) | |
517 | CertCloseStore(store, 0); | |
518 | ||
519 | if (hProv) | |
520 | CryptReleaseContext(hProv, 0); | |
521 | ||
522 | DEBUG_printf(("1httpLoadCredentials: Returning %d.", *credentials ? 0 : -1)); | |
523 | ||
524 | return (*credentials ? 0 : -1); | |
525 | } | |
526 | ||
527 | ||
528 | /* | |
529 | * 'httpSaveCredentials()' - Save X.509 credentials to a keychain file. | |
530 | * | |
531 | * @since CUPS 2.0/OS 10.10@ | |
532 | */ | |
533 | ||
534 | int /* O - -1 on error, 0 on success */ | |
535 | httpSaveCredentials( | |
536 | const char *path, /* I - Keychain path or @code NULL@ for default */ | |
537 | cups_array_t *credentials, /* I - Credentials */ | |
538 | const char *common_name) /* I - Common name for credentials */ | |
539 | { | |
540 | HCERTSTORE store = NULL; /* Certificate store */ | |
541 | PCCERT_CONTEXT storedContext = NULL; /* Context created from the store */ | |
542 | PCCERT_CONTEXT createdContext = NULL; /* Context created by us */ | |
543 | DWORD dwSize = 0; /* 32 bit size */ | |
544 | PBYTE p = NULL; /* Temporary storage */ | |
545 | HCRYPTPROV hProv = (HCRYPTPROV)NULL; | |
546 | /* Handle to a CSP */ | |
547 | CRYPT_KEY_PROV_INFO ckp; /* Handle to crypto key */ | |
548 | int ret = -1; /* Return value */ | |
549 | #ifdef DEBUG | |
550 | char error[1024]; /* Error message buffer */ | |
551 | #endif /* DEBUG */ | |
552 | ||
553 | ||
554 | DEBUG_printf(("httpSaveCredentials(path=\"%s\", credentials=%p, common_name=\"%s\")", path, credentials, common_name)); | |
555 | ||
556 | (void)path; | |
557 | ||
558 | if (!common_name) | |
559 | { | |
560 | DEBUG_puts("1httpSaveCredentials: Bad common name, returning -1."); | |
561 | return (-1); | |
562 | } | |
563 | ||
564 | createdContext = http_sspi_create_credential((http_credential_t *)cupsArrayFirst(credentials)); | |
565 | if (!createdContext) | |
566 | { | |
567 | DEBUG_puts("1httpSaveCredentials: Bad credentials, returning -1."); | |
568 | return (-1); | |
569 | } | |
570 | ||
571 | if (!CryptAcquireContextW(&hProv, L"RememberedContainer", MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET)) | |
572 | { | |
573 | if (GetLastError() == NTE_EXISTS) | |
574 | { | |
575 | if (!CryptAcquireContextW(&hProv, L"RememberedContainer", MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET)) | |
576 | { | |
577 | DEBUG_printf(("1httpSaveCredentials: CryptAcquireContext failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
578 | goto cleanup; | |
579 | } | |
580 | } | |
581 | } | |
582 | ||
583 | 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"); | |
584 | ||
585 | if (!store) | |
586 | { | |
587 | DEBUG_printf(("1httpSaveCredentials: CertOpenSystemStore failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
588 | goto cleanup; | |
589 | } | |
590 | ||
591 | dwSize = 0; | |
592 | ||
593 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, NULL, &dwSize, NULL)) | |
594 | { | |
595 | DEBUG_printf(("1httpSaveCredentials: CertStrToName failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
596 | goto cleanup; | |
597 | } | |
598 | ||
599 | p = (PBYTE)malloc(dwSize); | |
600 | ||
601 | if (!p) | |
602 | { | |
603 | DEBUG_printf(("1httpSaveCredentials: malloc failed for %d bytes.", dwSize)); | |
604 | goto cleanup; | |
605 | } | |
606 | ||
607 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, p, &dwSize, NULL)) | |
608 | { | |
609 | DEBUG_printf(("1httpSaveCredentials: CertStrToName failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
610 | goto cleanup; | |
611 | } | |
612 | ||
613 | /* | |
614 | * Add the created context to the named store, and associate it with the named | |
615 | * container... | |
616 | */ | |
617 | ||
618 | if (!CertAddCertificateContextToStore(store, createdContext, CERT_STORE_ADD_REPLACE_EXISTING, &storedContext)) | |
619 | { | |
620 | DEBUG_printf(("1httpSaveCredentials: CertAddCertificateContextToStore failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
621 | goto cleanup; | |
622 | } | |
623 | ||
624 | ZeroMemory(&ckp, sizeof(ckp)); | |
625 | ckp.pwszContainerName = L"RememberedContainer"; | |
626 | ckp.pwszProvName = MS_DEF_PROV_W; | |
627 | ckp.dwProvType = PROV_RSA_FULL; | |
628 | ckp.dwFlags = CRYPT_MACHINE_KEYSET; | |
629 | ckp.dwKeySpec = AT_KEYEXCHANGE; | |
630 | ||
631 | if (!CertSetCertificateContextProperty(storedContext, CERT_KEY_PROV_INFO_PROP_ID, 0, &ckp)) | |
632 | { | |
633 | DEBUG_printf(("1httpSaveCredentials: CertSetCertificateContextProperty failed: %s", http_sspi_strerror(error, sizeof(error), GetLastError()))); | |
634 | goto cleanup; | |
635 | } | |
636 | ||
637 | ret = 0; | |
638 | ||
639 | cleanup: | |
640 | ||
641 | /* | |
642 | * Cleanup | |
643 | */ | |
644 | ||
645 | if (createdContext) | |
646 | CertFreeCertificateContext(createdContext); | |
647 | ||
648 | if (storedContext) | |
649 | CertFreeCertificateContext(storedContext); | |
650 | ||
651 | if (p) | |
652 | free(p); | |
653 | ||
654 | if (store) | |
655 | CertCloseStore(store, 0); | |
656 | ||
657 | if (hProv) | |
658 | CryptReleaseContext(hProv, 0); | |
659 | ||
660 | DEBUG_printf(("1httpSaveCredentials: Returning %d.", ret)); | |
661 | return (ret); | |
662 | } | |
663 | ||
664 | ||
665 | /* | |
666 | * '_httpTLSInitialize()' - Initialize the TLS stack. | |
667 | */ | |
668 | ||
669 | void | |
670 | _httpTLSInitialize(void) | |
671 | { | |
672 | /* | |
673 | * Nothing to do... | |
674 | */ | |
675 | } | |
676 | ||
677 | ||
678 | /* | |
679 | * '_httpTLSPending()' - Return the number of pending TLS-encrypted bytes. | |
680 | */ | |
681 | ||
682 | size_t /* O - Bytes available */ | |
683 | _httpTLSPending(http_t *http) /* I - HTTP connection */ | |
684 | { | |
685 | if (http->tls) | |
686 | return (http->tls->readBufferUsed); | |
687 | else | |
688 | return (0); | |
689 | } | |
690 | ||
691 | ||
692 | /* | |
693 | * '_httpTLSRead()' - Read from a SSL/TLS connection. | |
694 | */ | |
695 | ||
696 | int /* O - Bytes read */ | |
697 | _httpTLSRead(http_t *http, /* I - HTTP connection */ | |
698 | char *buf, /* I - Buffer to store data */ | |
699 | int len) /* I - Length of buffer */ | |
700 | { | |
701 | int i; /* Looping var */ | |
702 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
703 | SecBufferDesc message; /* Array of SecBuffer struct */ | |
704 | SecBuffer buffers[4] = { 0 }; /* Security package buffer */ | |
705 | int num = 0; /* Return value */ | |
706 | PSecBuffer pDataBuffer; /* Data buffer */ | |
707 | PSecBuffer pExtraBuffer; /* Excess data buffer */ | |
708 | SECURITY_STATUS scRet; /* SSPI status */ | |
709 | ||
710 | ||
711 | DEBUG_printf(("4_httpTLSRead(http=%p, buf=%p, len=%d)", http, buf, len)); | |
712 | ||
713 | /* | |
714 | * If there are bytes that have already been decrypted and have not yet been | |
715 | * read, return those... | |
716 | */ | |
717 | ||
718 | if (sspi->readBufferUsed > 0) | |
719 | { | |
720 | int bytesToCopy = min(sspi->readBufferUsed, len); | |
721 | /* Number of bytes to copy */ | |
722 | ||
723 | memcpy(buf, sspi->readBuffer, bytesToCopy); | |
724 | sspi->readBufferUsed -= bytesToCopy; | |
725 | ||
726 | if (sspi->readBufferUsed > 0) | |
727 | memmove(sspi->readBuffer, sspi->readBuffer + bytesToCopy, sspi->readBufferUsed); | |
728 | ||
729 | DEBUG_printf(("5_httpTLSRead: Returning %d bytes previously decrypted.", bytesToCopy)); | |
730 | ||
731 | return (bytesToCopy); | |
732 | } | |
733 | ||
734 | /* | |
735 | * Initialize security buffer structs | |
736 | */ | |
737 | ||
738 | message.ulVersion = SECBUFFER_VERSION; | |
739 | message.cBuffers = 4; | |
740 | message.pBuffers = buffers; | |
741 | ||
742 | do | |
743 | { | |
744 | /* | |
745 | * If there is not enough space in the buffer, then increase its size... | |
746 | */ | |
747 | ||
748 | if (sspi->decryptBufferLength <= sspi->decryptBufferUsed) | |
749 | { | |
750 | BYTE *temp; /* New buffer */ | |
751 | ||
752 | if (sspi->decryptBufferLength >= 262144) | |
753 | { | |
754 | WSASetLastError(E_OUTOFMEMORY); | |
755 | DEBUG_puts("_httpTLSRead: Decryption buffer too large (>256k)"); | |
756 | return (-1); | |
757 | } | |
758 | ||
759 | if ((temp = realloc(sspi->decryptBuffer, sspi->decryptBufferLength + 4096)) == NULL) | |
760 | { | |
761 | DEBUG_printf(("_httpTLSRead: Unable to allocate %d byte decryption buffer.", sspi->decryptBufferLength + 4096)); | |
762 | WSASetLastError(E_OUTOFMEMORY); | |
763 | return (-1); | |
764 | } | |
765 | ||
766 | sspi->decryptBufferLength += 4096; | |
767 | sspi->decryptBuffer = temp; | |
768 | ||
769 | DEBUG_printf(("_httpTLSRead: Resized decryption buffer to %d bytes.", sspi->decryptBufferLength)); | |
770 | } | |
771 | ||
772 | buffers[0].pvBuffer = sspi->decryptBuffer; | |
773 | buffers[0].cbBuffer = (unsigned long)sspi->decryptBufferUsed; | |
774 | buffers[0].BufferType = SECBUFFER_DATA; | |
775 | buffers[1].BufferType = SECBUFFER_EMPTY; | |
776 | buffers[2].BufferType = SECBUFFER_EMPTY; | |
777 | buffers[3].BufferType = SECBUFFER_EMPTY; | |
778 | ||
779 | DEBUG_printf(("5_httpTLSRead: decryptBufferUsed=%d", sspi->decryptBufferUsed)); | |
780 | ||
781 | scRet = DecryptMessage(&sspi->context, &message, 0, NULL); | |
782 | ||
783 | if (scRet == SEC_E_INCOMPLETE_MESSAGE) | |
784 | { | |
785 | num = recv(http->fd, sspi->decryptBuffer + sspi->decryptBufferUsed, (int)(sspi->decryptBufferLength - sspi->decryptBufferUsed), 0); | |
786 | if (num < 0) | |
787 | { | |
788 | DEBUG_printf(("5_httpTLSRead: recv failed: %d", WSAGetLastError())); | |
789 | return (-1); | |
790 | } | |
791 | else if (num == 0) | |
792 | { | |
793 | DEBUG_puts("5_httpTLSRead: Server disconnected."); | |
794 | return (0); | |
795 | } | |
796 | ||
797 | DEBUG_printf(("5_httpTLSRead: Read %d bytes into decryption buffer.", num)); | |
798 | ||
799 | sspi->decryptBufferUsed += num; | |
800 | } | |
801 | } | |
802 | while (scRet == SEC_E_INCOMPLETE_MESSAGE); | |
803 | ||
804 | if (scRet == SEC_I_CONTEXT_EXPIRED) | |
805 | { | |
806 | DEBUG_puts("5_httpTLSRead: Context expired."); | |
807 | WSASetLastError(WSAECONNRESET); | |
808 | return (-1); | |
809 | } | |
810 | else if (scRet != SEC_E_OK) | |
811 | { | |
812 | DEBUG_printf(("5_httpTLSRead: DecryptMessage failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
813 | WSASetLastError(WSASYSCALLFAILURE); | |
814 | return (-1); | |
815 | } | |
816 | ||
817 | /* | |
818 | * The decryption worked. Now, locate data buffer. | |
819 | */ | |
820 | ||
821 | pDataBuffer = NULL; | |
822 | pExtraBuffer = NULL; | |
823 | ||
824 | for (i = 1; i < 4; i++) | |
825 | { | |
826 | if (buffers[i].BufferType == SECBUFFER_DATA) | |
827 | pDataBuffer = &buffers[i]; | |
828 | else if (!pExtraBuffer && (buffers[i].BufferType == SECBUFFER_EXTRA)) | |
829 | pExtraBuffer = &buffers[i]; | |
830 | } | |
831 | ||
832 | /* | |
833 | * If a data buffer is found, then copy the decrypted bytes to the passed-in | |
834 | * buffer... | |
835 | */ | |
836 | ||
837 | if (pDataBuffer) | |
838 | { | |
839 | int bytesToCopy = min((int)pDataBuffer->cbBuffer, len); | |
840 | /* Number of bytes to copy into buf */ | |
841 | int bytesToSave = pDataBuffer->cbBuffer - bytesToCopy; | |
842 | /* Number of bytes to save in our read buffer */ | |
843 | ||
844 | if (bytesToCopy) | |
845 | memcpy(buf, pDataBuffer->pvBuffer, bytesToCopy); | |
846 | ||
847 | /* | |
848 | * If there are more decrypted bytes than can be copied to the passed in | |
849 | * buffer, then save them... | |
850 | */ | |
851 | ||
852 | if (bytesToSave) | |
853 | { | |
854 | if ((sspi->readBufferLength - sspi->readBufferUsed) < bytesToSave) | |
855 | { | |
856 | BYTE *temp; /* New buffer pointer */ | |
857 | ||
858 | if ((temp = realloc(sspi->readBuffer, sspi->readBufferUsed + bytesToSave)) == NULL) | |
859 | { | |
860 | DEBUG_printf(("_httpTLSRead: Unable to allocate %d bytes.", sspi->readBufferUsed + bytesToSave)); | |
861 | WSASetLastError(E_OUTOFMEMORY); | |
862 | return (-1); | |
863 | } | |
864 | ||
865 | sspi->readBufferLength = sspi->readBufferUsed + bytesToSave; | |
866 | sspi->readBuffer = temp; | |
867 | } | |
868 | ||
869 | memcpy(((BYTE *)sspi->readBuffer) + sspi->readBufferUsed, ((BYTE *)pDataBuffer->pvBuffer) + bytesToCopy, bytesToSave); | |
870 | ||
871 | sspi->readBufferUsed += bytesToSave; | |
872 | } | |
873 | ||
874 | num = bytesToCopy; | |
875 | } | |
876 | else | |
877 | { | |
878 | DEBUG_puts("_httpTLSRead: Unable to find data buffer."); | |
879 | WSASetLastError(WSASYSCALLFAILURE); | |
880 | return (-1); | |
881 | } | |
882 | ||
883 | /* | |
884 | * If the decryption process left extra bytes, then save those back in | |
885 | * decryptBuffer. They will be processed the next time through the loop. | |
886 | */ | |
887 | ||
888 | if (pExtraBuffer) | |
889 | { | |
890 | memmove(sspi->decryptBuffer, pExtraBuffer->pvBuffer, pExtraBuffer->cbBuffer); | |
891 | sspi->decryptBufferUsed = pExtraBuffer->cbBuffer; | |
892 | } | |
893 | else | |
894 | { | |
895 | sspi->decryptBufferUsed = 0; | |
896 | } | |
897 | ||
898 | return (num); | |
899 | } | |
900 | ||
901 | ||
902 | /* | |
903 | * '_httpTLSSetOptions()' - Set TLS protocol and cipher suite options. | |
904 | */ | |
905 | ||
906 | void | |
907 | _httpTLSSetOptions(int options) /* I - Options */ | |
908 | { | |
909 | if (!(options & _HTTP_TLS_SET_DEFAULT) || tls_options < 0) | |
910 | { | |
911 | tls_options = options; | |
912 | tls_min_version = min_version; | |
913 | tls_max_version = max_version; | |
914 | } | |
915 | } | |
916 | ||
917 | ||
918 | /* | |
919 | * '_httpTLSStart()' - Set up SSL/TLS support on a connection. | |
920 | */ | |
921 | ||
922 | int /* O - 0 on success, -1 on failure */ | |
923 | _httpTLSStart(http_t *http) /* I - HTTP connection */ | |
924 | { | |
925 | char hostname[256], /* Hostname */ | |
926 | *hostptr; /* Pointer into hostname */ | |
927 | ||
928 | ||
929 | DEBUG_printf(("3_httpTLSStart(http=%p)", http)); | |
930 | ||
931 | if (tls_options < 0) | |
932 | { | |
933 | DEBUG_puts("4_httpTLSStart: Setting defaults."); | |
934 | _cupsSetDefaults(); | |
935 | DEBUG_printf(("4_httpTLSStart: tls_options=%x", tls_options)); | |
936 | } | |
937 | ||
938 | if ((http->tls = http_sspi_alloc()) == NULL) | |
939 | return (-1); | |
940 | ||
941 | if (http->mode == _HTTP_MODE_CLIENT) | |
942 | { | |
943 | /* | |
944 | * Client: determine hostname... | |
945 | */ | |
946 | ||
947 | if (httpAddrLocalhost(http->hostaddr)) | |
948 | { | |
949 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
950 | } | |
951 | else | |
952 | { | |
953 | /* | |
954 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
955 | */ | |
956 | ||
957 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
958 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
959 | *hostptr == '.') | |
960 | *hostptr = '\0'; | |
961 | } | |
962 | ||
963 | return (http_sspi_client(http, hostname)); | |
964 | } | |
965 | else | |
966 | { | |
967 | /* | |
968 | * Server: determine hostname to use... | |
969 | */ | |
970 | ||
971 | if (http->fields[HTTP_FIELD_HOST][0]) | |
972 | { | |
973 | /* | |
974 | * Use hostname for TLS upgrade... | |
975 | */ | |
976 | ||
977 | strlcpy(hostname, http->fields[HTTP_FIELD_HOST], sizeof(hostname)); | |
978 | } | |
979 | else | |
980 | { | |
981 | /* | |
982 | * Resolve hostname from connection address... | |
983 | */ | |
984 | ||
985 | http_addr_t addr; /* Connection address */ | |
986 | socklen_t addrlen; /* Length of address */ | |
987 | ||
988 | addrlen = sizeof(addr); | |
989 | if (getsockname(http->fd, (struct sockaddr *)&addr, &addrlen)) | |
990 | { | |
991 | DEBUG_printf(("4_httpTLSStart: Unable to get socket address: %s", strerror(errno))); | |
992 | hostname[0] = '\0'; | |
993 | } | |
994 | else if (httpAddrLocalhost(&addr)) | |
995 | hostname[0] = '\0'; | |
996 | else | |
997 | { | |
998 | httpAddrLookup(&addr, hostname, sizeof(hostname)); | |
999 | DEBUG_printf(("4_httpTLSStart: Resolved socket address to \"%s\".", hostname)); | |
1000 | } | |
1001 | } | |
1002 | ||
1003 | return (http_sspi_server(http, hostname)); | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | ||
1008 | /* | |
1009 | * '_httpTLSStop()' - Shut down SSL/TLS on a connection. | |
1010 | */ | |
1011 | ||
1012 | void | |
1013 | _httpTLSStop(http_t *http) /* I - HTTP connection */ | |
1014 | { | |
1015 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
1016 | ||
1017 | ||
1018 | if (sspi->contextInitialized && http->fd >= 0) | |
1019 | { | |
1020 | SecBufferDesc message; /* Array of SecBuffer struct */ | |
1021 | SecBuffer buffers[1] = { 0 }; | |
1022 | /* Security package buffer */ | |
1023 | DWORD dwType; /* Type */ | |
1024 | DWORD status; /* Status */ | |
1025 | ||
1026 | /* | |
1027 | * Notify schannel that we are about to close the connection. | |
1028 | */ | |
1029 | ||
1030 | dwType = SCHANNEL_SHUTDOWN; | |
1031 | ||
1032 | buffers[0].pvBuffer = &dwType; | |
1033 | buffers[0].BufferType = SECBUFFER_TOKEN; | |
1034 | buffers[0].cbBuffer = sizeof(dwType); | |
1035 | ||
1036 | message.cBuffers = 1; | |
1037 | message.pBuffers = buffers; | |
1038 | message.ulVersion = SECBUFFER_VERSION; | |
1039 | ||
1040 | status = ApplyControlToken(&sspi->context, &message); | |
1041 | ||
1042 | if (SUCCEEDED(status)) | |
1043 | { | |
1044 | PBYTE pbMessage; /* Message buffer */ | |
1045 | DWORD cbMessage; /* Message buffer count */ | |
1046 | DWORD cbData; /* Data count */ | |
1047 | DWORD dwSSPIFlags; /* SSL attributes we requested */ | |
1048 | DWORD dwSSPIOutFlags; /* SSL attributes we received */ | |
1049 | TimeStamp tsExpiry; /* Time stamp */ | |
1050 | ||
1051 | dwSSPIFlags = ASC_REQ_SEQUENCE_DETECT | | |
1052 | ASC_REQ_REPLAY_DETECT | | |
1053 | ASC_REQ_CONFIDENTIALITY | | |
1054 | ASC_REQ_EXTENDED_ERROR | | |
1055 | ASC_REQ_ALLOCATE_MEMORY | | |
1056 | ASC_REQ_STREAM; | |
1057 | ||
1058 | buffers[0].pvBuffer = NULL; | |
1059 | buffers[0].BufferType = SECBUFFER_TOKEN; | |
1060 | buffers[0].cbBuffer = 0; | |
1061 | ||
1062 | message.cBuffers = 1; | |
1063 | message.pBuffers = buffers; | |
1064 | message.ulVersion = SECBUFFER_VERSION; | |
1065 | ||
1066 | status = AcceptSecurityContext(&sspi->creds, &sspi->context, NULL, | |
1067 | dwSSPIFlags, SECURITY_NATIVE_DREP, NULL, | |
1068 | &message, &dwSSPIOutFlags, &tsExpiry); | |
1069 | ||
1070 | if (SUCCEEDED(status)) | |
1071 | { | |
1072 | pbMessage = buffers[0].pvBuffer; | |
1073 | cbMessage = buffers[0].cbBuffer; | |
1074 | ||
1075 | /* | |
1076 | * Send the close notify message to the client. | |
1077 | */ | |
1078 | ||
1079 | if (pbMessage && cbMessage) | |
1080 | { | |
1081 | cbData = send(http->fd, pbMessage, cbMessage, 0); | |
1082 | if ((cbData == SOCKET_ERROR) || (cbData == 0)) | |
1083 | { | |
1084 | status = WSAGetLastError(); | |
1085 | DEBUG_printf(("_httpTLSStop: sending close notify failed: %d", status)); | |
1086 | } | |
1087 | else | |
1088 | { | |
1089 | FreeContextBuffer(pbMessage); | |
1090 | } | |
1091 | } | |
1092 | } | |
1093 | else | |
1094 | { | |
1095 | DEBUG_printf(("_httpTLSStop: AcceptSecurityContext failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), status))); | |
1096 | } | |
1097 | } | |
1098 | else | |
1099 | { | |
1100 | DEBUG_printf(("_httpTLSStop: ApplyControlToken failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), status))); | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | http_sspi_free(sspi); | |
1105 | ||
1106 | http->tls = NULL; | |
1107 | } | |
1108 | ||
1109 | ||
1110 | /* | |
1111 | * '_httpTLSWrite()' - Write to a SSL/TLS connection. | |
1112 | */ | |
1113 | ||
1114 | int /* O - Bytes written */ | |
1115 | _httpTLSWrite(http_t *http, /* I - HTTP connection */ | |
1116 | const char *buf, /* I - Buffer holding data */ | |
1117 | int len) /* I - Length of buffer */ | |
1118 | { | |
1119 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
1120 | SecBufferDesc message; /* Array of SecBuffer struct */ | |
1121 | SecBuffer buffers[4] = { 0 }; /* Security package buffer */ | |
1122 | int bufferLen; /* Buffer length */ | |
1123 | int bytesLeft; /* Bytes left to write */ | |
1124 | const char *bufptr; /* Pointer into buffer */ | |
1125 | int num = 0; /* Return value */ | |
1126 | ||
1127 | ||
1128 | bufferLen = sspi->streamSizes.cbMaximumMessage + sspi->streamSizes.cbHeader + sspi->streamSizes.cbTrailer; | |
1129 | ||
1130 | if (bufferLen > sspi->writeBufferLength) | |
1131 | { | |
1132 | BYTE *temp; /* New buffer pointer */ | |
1133 | ||
1134 | if ((temp = (BYTE *)realloc(sspi->writeBuffer, bufferLen)) == NULL) | |
1135 | { | |
1136 | DEBUG_printf(("_httpTLSWrite: Unable to allocate buffer of %d bytes.", bufferLen)); | |
1137 | WSASetLastError(E_OUTOFMEMORY); | |
1138 | return (-1); | |
1139 | } | |
1140 | ||
1141 | sspi->writeBuffer = temp; | |
1142 | sspi->writeBufferLength = bufferLen; | |
1143 | } | |
1144 | ||
1145 | bytesLeft = len; | |
1146 | bufptr = buf; | |
1147 | ||
1148 | while (bytesLeft) | |
1149 | { | |
1150 | int chunk = min((int)sspi->streamSizes.cbMaximumMessage, bytesLeft); | |
1151 | /* Size of data to write */ | |
1152 | SECURITY_STATUS scRet; /* SSPI status */ | |
1153 | ||
1154 | /* | |
1155 | * Copy user data into the buffer, starting just past the header... | |
1156 | */ | |
1157 | ||
1158 | memcpy(sspi->writeBuffer + sspi->streamSizes.cbHeader, bufptr, chunk); | |
1159 | ||
1160 | /* | |
1161 | * Setup the SSPI buffers | |
1162 | */ | |
1163 | ||
1164 | message.ulVersion = SECBUFFER_VERSION; | |
1165 | message.cBuffers = 4; | |
1166 | message.pBuffers = buffers; | |
1167 | ||
1168 | buffers[0].pvBuffer = sspi->writeBuffer; | |
1169 | buffers[0].cbBuffer = sspi->streamSizes.cbHeader; | |
1170 | buffers[0].BufferType = SECBUFFER_STREAM_HEADER; | |
1171 | buffers[1].pvBuffer = sspi->writeBuffer + sspi->streamSizes.cbHeader; | |
1172 | buffers[1].cbBuffer = (unsigned long) chunk; | |
1173 | buffers[1].BufferType = SECBUFFER_DATA; | |
1174 | buffers[2].pvBuffer = sspi->writeBuffer + sspi->streamSizes.cbHeader + chunk; | |
1175 | buffers[2].cbBuffer = sspi->streamSizes.cbTrailer; | |
1176 | buffers[2].BufferType = SECBUFFER_STREAM_TRAILER; | |
1177 | buffers[3].BufferType = SECBUFFER_EMPTY; | |
1178 | ||
1179 | /* | |
1180 | * Encrypt the data | |
1181 | */ | |
1182 | ||
1183 | scRet = EncryptMessage(&sspi->context, 0, &message, 0); | |
1184 | ||
1185 | if (FAILED(scRet)) | |
1186 | { | |
1187 | DEBUG_printf(("_httpTLSWrite: EncryptMessage failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1188 | WSASetLastError(WSASYSCALLFAILURE); | |
1189 | return (-1); | |
1190 | } | |
1191 | ||
1192 | /* | |
1193 | * Send the data. Remember the size of the total data to send is the size | |
1194 | * of the header, the size of the data the caller passed in and the size | |
1195 | * of the trailer... | |
1196 | */ | |
1197 | ||
1198 | num = send(http->fd, sspi->writeBuffer, buffers[0].cbBuffer + buffers[1].cbBuffer + buffers[2].cbBuffer, 0); | |
1199 | ||
1200 | if (num <= 0) | |
1201 | { | |
1202 | DEBUG_printf(("_httpTLSWrite: send failed: %ld", WSAGetLastError())); | |
1203 | return (num); | |
1204 | } | |
1205 | ||
1206 | bytesLeft -= chunk; | |
1207 | bufptr += chunk; | |
1208 | } | |
1209 | ||
1210 | return (len); | |
1211 | } | |
1212 | ||
1213 | ||
1214 | #if 0 | |
1215 | /* | |
1216 | * 'http_setup_ssl()' - Set up SSL/TLS support on a connection. | |
1217 | */ | |
1218 | ||
1219 | static int /* O - 0 on success, -1 on failure */ | |
1220 | http_setup_ssl(http_t *http) /* I - Connection to server */ | |
1221 | { | |
1222 | char hostname[256], /* Hostname */ | |
1223 | *hostptr; /* Pointer into hostname */ | |
1224 | ||
1225 | TCHAR username[256]; /* Username returned from GetUserName() */ | |
1226 | TCHAR commonName[256];/* Common name for certificate */ | |
1227 | DWORD dwSize; /* 32 bit size */ | |
1228 | ||
1229 | ||
1230 | DEBUG_printf(("7http_setup_ssl(http=%p)", http)); | |
1231 | ||
1232 | /* | |
1233 | * Get the hostname to use for SSL... | |
1234 | */ | |
1235 | ||
1236 | if (httpAddrLocalhost(http->hostaddr)) | |
1237 | { | |
1238 | strlcpy(hostname, "localhost", sizeof(hostname)); | |
1239 | } | |
1240 | else | |
1241 | { | |
1242 | /* | |
1243 | * Otherwise make sure the hostname we have does not end in a trailing dot. | |
1244 | */ | |
1245 | ||
1246 | strlcpy(hostname, http->hostname, sizeof(hostname)); | |
1247 | if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && | |
1248 | *hostptr == '.') | |
1249 | *hostptr = '\0'; | |
1250 | } | |
1251 | ||
1252 | http->tls = http_sspi_alloc(); | |
1253 | ||
1254 | if (!http->tls) | |
1255 | { | |
1256 | _cupsSetHTTPError(HTTP_STATUS_ERROR); | |
1257 | return (-1); | |
1258 | } | |
1259 | ||
1260 | dwSize = sizeof(username) / sizeof(TCHAR); | |
1261 | GetUserName(username, &dwSize); | |
1262 | _sntprintf_s(commonName, sizeof(commonName) / sizeof(TCHAR), | |
1263 | sizeof(commonName) / sizeof(TCHAR), TEXT("CN=%s"), username); | |
1264 | ||
1265 | if (!_sspiGetCredentials(http->tls, L"ClientContainer", | |
1266 | commonName, FALSE)) | |
1267 | { | |
1268 | _sspiFree(http->tls); | |
1269 | http->tls = NULL; | |
1270 | ||
1271 | http->error = EIO; | |
1272 | http->status = HTTP_STATUS_ERROR; | |
1273 | ||
1274 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, | |
1275 | _("Unable to establish a secure connection to host."), 1); | |
1276 | ||
1277 | return (-1); | |
1278 | } | |
1279 | ||
1280 | _sspiSetAllowsAnyRoot(http->tls, TRUE); | |
1281 | _sspiSetAllowsExpiredCerts(http->tls, TRUE); | |
1282 | ||
1283 | if (!_sspiConnect(http->tls, hostname)) | |
1284 | { | |
1285 | _sspiFree(http->tls); | |
1286 | http->tls = NULL; | |
1287 | ||
1288 | http->error = EIO; | |
1289 | http->status = HTTP_STATUS_ERROR; | |
1290 | ||
1291 | _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, | |
1292 | _("Unable to establish a secure connection to host."), 1); | |
1293 | ||
1294 | return (-1); | |
1295 | } | |
1296 | ||
1297 | return (0); | |
1298 | } | |
1299 | #endif // 0 | |
1300 | ||
1301 | ||
1302 | /* | |
1303 | * 'http_sspi_alloc()' - Allocate SSPI object. | |
1304 | */ | |
1305 | ||
1306 | static _http_sspi_t * /* O - New SSPI/SSL object */ | |
1307 | http_sspi_alloc(void) | |
1308 | { | |
1309 | return ((_http_sspi_t *)calloc(sizeof(_http_sspi_t), 1)); | |
1310 | } | |
1311 | ||
1312 | ||
1313 | /* | |
1314 | * 'http_sspi_client()' - Negotiate a TLS connection as a client. | |
1315 | */ | |
1316 | ||
1317 | static int /* O - 0 on success, -1 on failure */ | |
1318 | http_sspi_client(http_t *http, /* I - Client connection */ | |
1319 | const char *hostname) /* I - Server hostname */ | |
1320 | { | |
1321 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
1322 | DWORD dwSize; /* Size for buffer */ | |
1323 | DWORD dwSSPIFlags; /* SSL connection attributes we want */ | |
1324 | DWORD dwSSPIOutFlags; /* SSL connection attributes we got */ | |
1325 | TimeStamp tsExpiry; /* Time stamp */ | |
1326 | SECURITY_STATUS scRet; /* Status */ | |
1327 | int cbData; /* Data count */ | |
1328 | SecBufferDesc inBuffer; /* Array of SecBuffer structs */ | |
1329 | SecBuffer inBuffers[2]; /* Security package buffer */ | |
1330 | SecBufferDesc outBuffer; /* Array of SecBuffer structs */ | |
1331 | SecBuffer outBuffers[1]; /* Security package buffer */ | |
1332 | int ret = 0; /* Return value */ | |
1333 | char username[1024], /* Current username */ | |
1334 | common_name[1024]; /* CN=username */ | |
1335 | ||
1336 | ||
1337 | DEBUG_printf(("4http_sspi_client(http=%p, hostname=\"%s\")", http, hostname)); | |
1338 | ||
1339 | dwSSPIFlags = ISC_REQ_SEQUENCE_DETECT | | |
1340 | ISC_REQ_REPLAY_DETECT | | |
1341 | ISC_REQ_CONFIDENTIALITY | | |
1342 | ISC_RET_EXTENDED_ERROR | | |
1343 | ISC_REQ_ALLOCATE_MEMORY | | |
1344 | ISC_REQ_STREAM; | |
1345 | ||
1346 | /* | |
1347 | * Lookup the client certificate... | |
1348 | */ | |
1349 | ||
1350 | dwSize = sizeof(username); | |
1351 | GetUserName(username, &dwSize); | |
1352 | snprintf(common_name, sizeof(common_name), "CN=%s", username); | |
1353 | ||
1354 | if (!http_sspi_find_credentials(http, L"ClientContainer", common_name)) | |
1355 | if (!http_sspi_make_credentials(http->tls, L"ClientContainer", common_name, _HTTP_MODE_CLIENT, 10)) | |
1356 | { | |
1357 | DEBUG_puts("5http_sspi_client: Unable to get client credentials."); | |
1358 | return (-1); | |
1359 | } | |
1360 | ||
1361 | /* | |
1362 | * Initiate a ClientHello message and generate a token. | |
1363 | */ | |
1364 | ||
1365 | outBuffers[0].pvBuffer = NULL; | |
1366 | outBuffers[0].BufferType = SECBUFFER_TOKEN; | |
1367 | outBuffers[0].cbBuffer = 0; | |
1368 | ||
1369 | outBuffer.cBuffers = 1; | |
1370 | outBuffer.pBuffers = outBuffers; | |
1371 | outBuffer.ulVersion = SECBUFFER_VERSION; | |
1372 | ||
1373 | scRet = InitializeSecurityContext(&sspi->creds, NULL, TEXT(""), dwSSPIFlags, 0, SECURITY_NATIVE_DREP, NULL, 0, &sspi->context, &outBuffer, &dwSSPIOutFlags, &tsExpiry); | |
1374 | ||
1375 | if (scRet != SEC_I_CONTINUE_NEEDED) | |
1376 | { | |
1377 | DEBUG_printf(("5http_sspi_client: InitializeSecurityContext(1) failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1378 | return (-1); | |
1379 | } | |
1380 | ||
1381 | /* | |
1382 | * Send response to server if there is one. | |
1383 | */ | |
1384 | ||
1385 | if (outBuffers[0].cbBuffer && outBuffers[0].pvBuffer) | |
1386 | { | |
1387 | if ((cbData = send(http->fd, outBuffers[0].pvBuffer, outBuffers[0].cbBuffer, 0)) <= 0) | |
1388 | { | |
1389 | DEBUG_printf(("5http_sspi_client: send failed: %d", WSAGetLastError())); | |
1390 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1391 | DeleteSecurityContext(&sspi->context); | |
1392 | return (-1); | |
1393 | } | |
1394 | ||
1395 | DEBUG_printf(("5http_sspi_client: %d bytes of handshake data sent.", cbData)); | |
1396 | ||
1397 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1398 | outBuffers[0].pvBuffer = NULL; | |
1399 | } | |
1400 | ||
1401 | dwSSPIFlags = ISC_REQ_MANUAL_CRED_VALIDATION | | |
1402 | ISC_REQ_SEQUENCE_DETECT | | |
1403 | ISC_REQ_REPLAY_DETECT | | |
1404 | ISC_REQ_CONFIDENTIALITY | | |
1405 | ISC_RET_EXTENDED_ERROR | | |
1406 | ISC_REQ_ALLOCATE_MEMORY | | |
1407 | ISC_REQ_STREAM; | |
1408 | ||
1409 | sspi->decryptBufferUsed = 0; | |
1410 | ||
1411 | /* | |
1412 | * Loop until the handshake is finished or an error occurs. | |
1413 | */ | |
1414 | ||
1415 | scRet = SEC_I_CONTINUE_NEEDED; | |
1416 | ||
1417 | while(scRet == SEC_I_CONTINUE_NEEDED || | |
1418 | scRet == SEC_E_INCOMPLETE_MESSAGE || | |
1419 | scRet == SEC_I_INCOMPLETE_CREDENTIALS) | |
1420 | { | |
1421 | if (sspi->decryptBufferUsed == 0 || scRet == SEC_E_INCOMPLETE_MESSAGE) | |
1422 | { | |
1423 | if (sspi->decryptBufferLength <= sspi->decryptBufferUsed) | |
1424 | { | |
1425 | BYTE *temp; /* New buffer */ | |
1426 | ||
1427 | if (sspi->decryptBufferLength >= 262144) | |
1428 | { | |
1429 | WSASetLastError(E_OUTOFMEMORY); | |
1430 | DEBUG_puts("5http_sspi_client: Decryption buffer too large (>256k)"); | |
1431 | return (-1); | |
1432 | } | |
1433 | ||
1434 | if ((temp = realloc(sspi->decryptBuffer, sspi->decryptBufferLength + 4096)) == NULL) | |
1435 | { | |
1436 | DEBUG_printf(("5http_sspi_client: Unable to allocate %d byte buffer.", sspi->decryptBufferLength + 4096)); | |
1437 | WSASetLastError(E_OUTOFMEMORY); | |
1438 | return (-1); | |
1439 | } | |
1440 | ||
1441 | sspi->decryptBufferLength += 4096; | |
1442 | sspi->decryptBuffer = temp; | |
1443 | } | |
1444 | ||
1445 | cbData = recv(http->fd, sspi->decryptBuffer + sspi->decryptBufferUsed, (int)(sspi->decryptBufferLength - sspi->decryptBufferUsed), 0); | |
1446 | ||
1447 | if (cbData < 0) | |
1448 | { | |
1449 | DEBUG_printf(("5http_sspi_client: recv failed: %d", WSAGetLastError())); | |
1450 | return (-1); | |
1451 | } | |
1452 | else if (cbData == 0) | |
1453 | { | |
1454 | DEBUG_printf(("5http_sspi_client: Server unexpectedly disconnected.")); | |
1455 | return (-1); | |
1456 | } | |
1457 | ||
1458 | DEBUG_printf(("5http_sspi_client: %d bytes of handshake data received", cbData)); | |
1459 | ||
1460 | sspi->decryptBufferUsed += cbData; | |
1461 | } | |
1462 | ||
1463 | /* | |
1464 | * Set up the input buffers. Buffer 0 is used to pass in data received from | |
1465 | * the server. Schannel will consume some or all of this. Leftover data | |
1466 | * (if any) will be placed in buffer 1 and given a buffer type of | |
1467 | * SECBUFFER_EXTRA. | |
1468 | */ | |
1469 | ||
1470 | inBuffers[0].pvBuffer = sspi->decryptBuffer; | |
1471 | inBuffers[0].cbBuffer = (unsigned long)sspi->decryptBufferUsed; | |
1472 | inBuffers[0].BufferType = SECBUFFER_TOKEN; | |
1473 | ||
1474 | inBuffers[1].pvBuffer = NULL; | |
1475 | inBuffers[1].cbBuffer = 0; | |
1476 | inBuffers[1].BufferType = SECBUFFER_EMPTY; | |
1477 | ||
1478 | inBuffer.cBuffers = 2; | |
1479 | inBuffer.pBuffers = inBuffers; | |
1480 | inBuffer.ulVersion = SECBUFFER_VERSION; | |
1481 | ||
1482 | /* | |
1483 | * Set up the output buffers. These are initialized to NULL so as to make it | |
1484 | * less likely we'll attempt to free random garbage later. | |
1485 | */ | |
1486 | ||
1487 | outBuffers[0].pvBuffer = NULL; | |
1488 | outBuffers[0].BufferType = SECBUFFER_TOKEN; | |
1489 | outBuffers[0].cbBuffer = 0; | |
1490 | ||
1491 | outBuffer.cBuffers = 1; | |
1492 | outBuffer.pBuffers = outBuffers; | |
1493 | outBuffer.ulVersion = SECBUFFER_VERSION; | |
1494 | ||
1495 | /* | |
1496 | * Call InitializeSecurityContext. | |
1497 | */ | |
1498 | ||
1499 | scRet = InitializeSecurityContext(&sspi->creds, &sspi->context, NULL, dwSSPIFlags, 0, SECURITY_NATIVE_DREP, &inBuffer, 0, NULL, &outBuffer, &dwSSPIOutFlags, &tsExpiry); | |
1500 | ||
1501 | /* | |
1502 | * If InitializeSecurityContext was successful (or if the error was one of | |
1503 | * the special extended ones), send the contents of the output buffer to the | |
1504 | * server. | |
1505 | */ | |
1506 | ||
1507 | if (scRet == SEC_E_OK || | |
1508 | scRet == SEC_I_CONTINUE_NEEDED || | |
1509 | FAILED(scRet) && (dwSSPIOutFlags & ISC_RET_EXTENDED_ERROR)) | |
1510 | { | |
1511 | if (outBuffers[0].cbBuffer && outBuffers[0].pvBuffer) | |
1512 | { | |
1513 | cbData = send(http->fd, outBuffers[0].pvBuffer, outBuffers[0].cbBuffer, 0); | |
1514 | ||
1515 | if (cbData <= 0) | |
1516 | { | |
1517 | DEBUG_printf(("5http_sspi_client: send failed: %d", WSAGetLastError())); | |
1518 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1519 | DeleteSecurityContext(&sspi->context); | |
1520 | return (-1); | |
1521 | } | |
1522 | ||
1523 | DEBUG_printf(("5http_sspi_client: %d bytes of handshake data sent.", cbData)); | |
1524 | ||
1525 | /* | |
1526 | * Free output buffer. | |
1527 | */ | |
1528 | ||
1529 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
1530 | outBuffers[0].pvBuffer = NULL; | |
1531 | } | |
1532 | } | |
1533 | ||
1534 | /* | |
1535 | * If InitializeSecurityContext returned SEC_E_INCOMPLETE_MESSAGE, then we | |
1536 | * need to read more data from the server and try again. | |
1537 | */ | |
1538 | ||
1539 | if (scRet == SEC_E_INCOMPLETE_MESSAGE) | |
1540 | continue; | |
1541 | ||
1542 | /* | |
1543 | * If InitializeSecurityContext returned SEC_E_OK, then the handshake | |
1544 | * completed successfully. | |
1545 | */ | |
1546 | ||
1547 | if (scRet == SEC_E_OK) | |
1548 | { | |
1549 | /* | |
1550 | * If the "extra" buffer contains data, this is encrypted application | |
1551 | * protocol layer stuff. It needs to be saved. The application layer will | |
1552 | * later decrypt it with DecryptMessage. | |
1553 | */ | |
1554 | ||
1555 | DEBUG_puts("5http_sspi_client: Handshake was successful."); | |
1556 | ||
1557 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
1558 | { | |
1559 | memmove(sspi->decryptBuffer, sspi->decryptBuffer + sspi->decryptBufferUsed - inBuffers[1].cbBuffer, inBuffers[1].cbBuffer); | |
1560 | ||
1561 | sspi->decryptBufferUsed = inBuffers[1].cbBuffer; | |
1562 | ||
1563 | DEBUG_printf(("5http_sspi_client: %d bytes of app data was bundled with handshake data", sspi->decryptBufferUsed)); | |
1564 | } | |
1565 | else | |
1566 | sspi->decryptBufferUsed = 0; | |
1567 | ||
1568 | /* | |
1569 | * Bail out to quit | |
1570 | */ | |
1571 | ||
1572 | break; | |
1573 | } | |
1574 | ||
1575 | /* | |
1576 | * Check for fatal error. | |
1577 | */ | |
1578 | ||
1579 | if (FAILED(scRet)) | |
1580 | { | |
1581 | DEBUG_printf(("5http_sspi_client: InitializeSecurityContext(2) failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1582 | ret = -1; | |
1583 | break; | |
1584 | } | |
1585 | ||
1586 | /* | |
1587 | * If InitializeSecurityContext returned SEC_I_INCOMPLETE_CREDENTIALS, | |
1588 | * then the server just requested client authentication. | |
1589 | */ | |
1590 | ||
1591 | if (scRet == SEC_I_INCOMPLETE_CREDENTIALS) | |
1592 | { | |
1593 | /* | |
1594 | * Unimplemented | |
1595 | */ | |
1596 | ||
1597 | DEBUG_printf(("5http_sspi_client: server requested client credentials.")); | |
1598 | ret = -1; | |
1599 | break; | |
1600 | } | |
1601 | ||
1602 | /* | |
1603 | * Copy any leftover data from the "extra" buffer, and go around again. | |
1604 | */ | |
1605 | ||
1606 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
1607 | { | |
1608 | memmove(sspi->decryptBuffer, sspi->decryptBuffer + sspi->decryptBufferUsed - inBuffers[1].cbBuffer, inBuffers[1].cbBuffer); | |
1609 | ||
1610 | sspi->decryptBufferUsed = inBuffers[1].cbBuffer; | |
1611 | } | |
1612 | else | |
1613 | { | |
1614 | sspi->decryptBufferUsed = 0; | |
1615 | } | |
1616 | } | |
1617 | ||
1618 | if (!ret) | |
1619 | { | |
1620 | /* | |
1621 | * Success! Get the server cert | |
1622 | */ | |
1623 | ||
1624 | sspi->contextInitialized = TRUE; | |
1625 | ||
1626 | scRet = QueryContextAttributes(&sspi->context, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (VOID *)&(sspi->remoteCert)); | |
1627 | ||
1628 | if (scRet != SEC_E_OK) | |
1629 | { | |
1630 | DEBUG_printf(("5http_sspi_client: QueryContextAttributes failed(SECPKG_ATTR_REMOTE_CERT_CONTEXT): %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1631 | return (-1); | |
1632 | } | |
1633 | ||
1634 | /* | |
1635 | * Find out how big the header/trailer will be: | |
1636 | */ | |
1637 | ||
1638 | scRet = QueryContextAttributes(&sspi->context, SECPKG_ATTR_STREAM_SIZES, &sspi->streamSizes); | |
1639 | ||
1640 | if (scRet != SEC_E_OK) | |
1641 | { | |
1642 | DEBUG_printf(("5http_sspi_client: QueryContextAttributes failed(SECPKG_ATTR_STREAM_SIZES): %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
1643 | ret = -1; | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | return (ret); | |
1648 | } | |
1649 | ||
1650 | ||
1651 | /* | |
1652 | * 'http_sspi_create_credential()' - Create an SSPI certificate context. | |
1653 | */ | |
1654 | ||
1655 | static PCCERT_CONTEXT /* O - Certificate context */ | |
1656 | http_sspi_create_credential( | |
1657 | http_credential_t *cred) /* I - Credential */ | |
1658 | { | |
1659 | if (cred) | |
1660 | return (CertCreateCertificateContext(X509_ASN_ENCODING, cred->data, cred->datalen)); | |
1661 | else | |
1662 | return (NULL); | |
1663 | } | |
1664 | ||
1665 | ||
1666 | /* | |
1667 | * 'http_sspi_find_credentials()' - Retrieve a TLS certificate from the system store. | |
1668 | */ | |
1669 | ||
1670 | static BOOL /* O - 1 on success, 0 on failure */ | |
1671 | http_sspi_find_credentials( | |
1672 | http_t *http, /* I - HTTP connection */ | |
1673 | const LPWSTR container, /* I - Cert container name */ | |
1674 | const char *common_name) /* I - Common name of certificate */ | |
1675 | { | |
1676 | _http_sspi_t *sspi = http->tls; /* SSPI data */ | |
1677 | HCERTSTORE store = NULL; /* Certificate store */ | |
1678 | PCCERT_CONTEXT storedContext = NULL; /* Context created from the store */ | |
1679 | DWORD dwSize = 0; /* 32 bit size */ | |
1680 | PBYTE p = NULL; /* Temporary storage */ | |
1681 | HCRYPTPROV hProv = (HCRYPTPROV)NULL; | |
1682 | /* Handle to a CSP */ | |
1683 | CERT_NAME_BLOB sib; /* Arbitrary array of bytes */ | |
1684 | SCHANNEL_CRED SchannelCred; /* Schannel credential data */ | |
1685 | TimeStamp tsExpiry; /* Time stamp */ | |
1686 | SECURITY_STATUS Status; /* Status */ | |
1687 | BOOL ok = TRUE; /* Return value */ | |
1688 | ||
1689 | ||
1690 | if (!CryptAcquireContextW(&hProv, (LPWSTR)container, MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET)) | |
1691 | { | |
1692 | if (GetLastError() == NTE_EXISTS) | |
1693 | { | |
1694 | if (!CryptAcquireContextW(&hProv, (LPWSTR)container, MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET)) | |
1695 | { | |
1696 | DEBUG_printf(("5http_sspi_find_credentials: CryptAcquireContext failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1697 | ok = FALSE; | |
1698 | goto cleanup; | |
1699 | } | |
1700 | } | |
1701 | } | |
1702 | ||
1703 | 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"); | |
1704 | ||
1705 | if (!store) | |
1706 | { | |
1707 | DEBUG_printf(("5http_sspi_find_credentials: CertOpenSystemStore failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1708 | ok = FALSE; | |
1709 | goto cleanup; | |
1710 | } | |
1711 | ||
1712 | dwSize = 0; | |
1713 | ||
1714 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, NULL, &dwSize, NULL)) | |
1715 | { | |
1716 | DEBUG_printf(("5http_sspi_find_credentials: CertStrToName failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1717 | ok = FALSE; | |
1718 | goto cleanup; | |
1719 | } | |
1720 | ||
1721 | p = (PBYTE)malloc(dwSize); | |
1722 | ||
1723 | if (!p) | |
1724 | { | |
1725 | DEBUG_printf(("5http_sspi_find_credentials: malloc failed for %d bytes.", dwSize)); | |
1726 | ok = FALSE; | |
1727 | goto cleanup; | |
1728 | } | |
1729 | ||
1730 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, p, &dwSize, NULL)) | |
1731 | { | |
1732 | DEBUG_printf(("5http_sspi_find_credentials: CertStrToName failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1733 | ok = FALSE; | |
1734 | goto cleanup; | |
1735 | } | |
1736 | ||
1737 | sib.cbData = dwSize; | |
1738 | sib.pbData = p; | |
1739 | ||
1740 | storedContext = CertFindCertificateInStore(store, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, 0, CERT_FIND_SUBJECT_NAME, &sib, NULL); | |
1741 | ||
1742 | if (!storedContext) | |
1743 | { | |
1744 | DEBUG_printf(("5http_sspi_find_credentials: Unable to find credentials for \"%s\".", common_name)); | |
1745 | ok = FALSE; | |
1746 | goto cleanup; | |
1747 | } | |
1748 | ||
1749 | ZeroMemory(&SchannelCred, sizeof(SchannelCred)); | |
1750 | ||
1751 | SchannelCred.dwVersion = SCHANNEL_CRED_VERSION; | |
1752 | SchannelCred.cCreds = 1; | |
1753 | SchannelCred.paCred = &storedContext; | |
1754 | ||
1755 | /* | |
1756 | * Set supported protocols (can also be overriden in the registry...) | |
1757 | */ | |
1758 | ||
1759 | #ifdef SP_PROT_TLS1_2_SERVER | |
1760 | if (http->mode == _HTTP_MODE_SERVER) | |
1761 | { | |
1762 | if (tls_options & _HTTP_TLS_DENY_TLS10) | |
1763 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_2_SERVER | SP_PROT_TLS1_1_SERVER; | |
1764 | else if (tls_options & _HTTP_TLS_ALLOW_SSL3) | |
1765 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_2_SERVER | SP_PROT_TLS1_1_SERVER | SP_PROT_TLS1_0_SERVER | SP_PROT_SSL3_SERVER; | |
1766 | else | |
1767 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_2_SERVER | SP_PROT_TLS1_1_SERVER | SP_PROT_TLS1_0_SERVER; | |
1768 | } | |
1769 | else | |
1770 | { | |
1771 | if (tls_options & _HTTP_TLS_DENY_TLS10) | |
1772 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_2_CLIENT | SP_PROT_TLS1_1_CLIENT; | |
1773 | else if (tls_options & _HTTP_TLS_ALLOW_SSL3) | |
1774 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_2_CLIENT | SP_PROT_TLS1_1_CLIENT | SP_PROT_TLS1_0_CLIENT | SP_PROT_SSL3_CLIENT; | |
1775 | else | |
1776 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_2_CLIENT | SP_PROT_TLS1_1_CLIENT | SP_PROT_TLS1_0_CLIENT; | |
1777 | } | |
1778 | ||
1779 | #else | |
1780 | if (http->mode == _HTTP_MODE_SERVER) | |
1781 | { | |
1782 | if (tls_min_version == _HTTP_TLS_SSL3) | |
1783 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_SERVER | SP_PROT_SSL3_SERVER; | |
1784 | else | |
1785 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_SERVER; | |
1786 | } | |
1787 | else | |
1788 | { | |
1789 | if (tls_min_version == _HTTP_TLS_SSL3) | |
1790 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_CLIENT | SP_PROT_SSL3_CLIENT; | |
1791 | else | |
1792 | SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1_CLIENT; | |
1793 | } | |
1794 | #endif /* SP_PROT_TLS1_2_SERVER */ | |
1795 | ||
1796 | /* TODO: Support _HTTP_TLS_ALLOW_RC4, _HTTP_TLS_ALLOW_DH, and _HTTP_TLS_DENY_CBC options; right now we'll rely on Windows registry to enable/disable RC4/DH/CBC... */ | |
1797 | ||
1798 | /* | |
1799 | * Create an SSPI credential. | |
1800 | */ | |
1801 | ||
1802 | Status = AcquireCredentialsHandle(NULL, UNISP_NAME, http->mode == _HTTP_MODE_SERVER ? SECPKG_CRED_INBOUND : SECPKG_CRED_OUTBOUND, NULL, &SchannelCred, NULL, NULL, &sspi->creds, &tsExpiry); | |
1803 | if (Status != SEC_E_OK) | |
1804 | { | |
1805 | DEBUG_printf(("5http_sspi_find_credentials: AcquireCredentialsHandle failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), Status))); | |
1806 | ok = FALSE; | |
1807 | goto cleanup; | |
1808 | } | |
1809 | ||
1810 | cleanup: | |
1811 | ||
1812 | /* | |
1813 | * Cleanup | |
1814 | */ | |
1815 | ||
1816 | if (storedContext) | |
1817 | CertFreeCertificateContext(storedContext); | |
1818 | ||
1819 | if (p) | |
1820 | free(p); | |
1821 | ||
1822 | if (store) | |
1823 | CertCloseStore(store, 0); | |
1824 | ||
1825 | if (hProv) | |
1826 | CryptReleaseContext(hProv, 0); | |
1827 | ||
1828 | return (ok); | |
1829 | } | |
1830 | ||
1831 | ||
1832 | /* | |
1833 | * 'http_sspi_free()' - Close a connection and free resources. | |
1834 | */ | |
1835 | ||
1836 | static void | |
1837 | http_sspi_free(_http_sspi_t *sspi) /* I - SSPI data */ | |
1838 | { | |
1839 | if (!sspi) | |
1840 | return; | |
1841 | ||
1842 | if (sspi->contextInitialized) | |
1843 | DeleteSecurityContext(&sspi->context); | |
1844 | ||
1845 | if (sspi->decryptBuffer) | |
1846 | free(sspi->decryptBuffer); | |
1847 | ||
1848 | if (sspi->readBuffer) | |
1849 | free(sspi->readBuffer); | |
1850 | ||
1851 | if (sspi->writeBuffer) | |
1852 | free(sspi->writeBuffer); | |
1853 | ||
1854 | if (sspi->localCert) | |
1855 | CertFreeCertificateContext(sspi->localCert); | |
1856 | ||
1857 | if (sspi->remoteCert) | |
1858 | CertFreeCertificateContext(sspi->remoteCert); | |
1859 | ||
1860 | free(sspi); | |
1861 | } | |
1862 | ||
1863 | ||
1864 | /* | |
1865 | * 'http_sspi_make_credentials()' - Create a TLS certificate in the system store. | |
1866 | */ | |
1867 | ||
1868 | static BOOL /* O - 1 on success, 0 on failure */ | |
1869 | http_sspi_make_credentials( | |
1870 | _http_sspi_t *sspi, /* I - SSPI data */ | |
1871 | const LPWSTR container, /* I - Cert container name */ | |
1872 | const char *common_name, /* I - Common name of certificate */ | |
1873 | _http_mode_t mode, /* I - Client or server? */ | |
1874 | int years) /* I - Years until expiration */ | |
1875 | { | |
1876 | HCERTSTORE store = NULL; /* Certificate store */ | |
1877 | PCCERT_CONTEXT storedContext = NULL; /* Context created from the store */ | |
1878 | PCCERT_CONTEXT createdContext = NULL; /* Context created by us */ | |
1879 | DWORD dwSize = 0; /* 32 bit size */ | |
1880 | PBYTE p = NULL; /* Temporary storage */ | |
1881 | HCRYPTPROV hProv = (HCRYPTPROV)NULL; | |
1882 | /* Handle to a CSP */ | |
1883 | CERT_NAME_BLOB sib; /* Arbitrary array of bytes */ | |
1884 | SCHANNEL_CRED SchannelCred; /* Schannel credential data */ | |
1885 | TimeStamp tsExpiry; /* Time stamp */ | |
1886 | SECURITY_STATUS Status; /* Status */ | |
1887 | HCRYPTKEY hKey = (HCRYPTKEY)NULL; /* Handle to crypto key */ | |
1888 | CRYPT_KEY_PROV_INFO kpi; /* Key container info */ | |
1889 | SYSTEMTIME et; /* System time */ | |
1890 | CERT_EXTENSIONS exts; /* Array of cert extensions */ | |
1891 | CRYPT_KEY_PROV_INFO ckp; /* Handle to crypto key */ | |
1892 | BOOL ok = TRUE; /* Return value */ | |
1893 | ||
1894 | ||
1895 | DEBUG_printf(("4http_sspi_make_credentials(sspi=%p, container=%p, common_name=\"%s\", mode=%d, years=%d)", sspi, container, common_name, mode, years)); | |
1896 | ||
1897 | if (!CryptAcquireContextW(&hProv, (LPWSTR)container, MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET)) | |
1898 | { | |
1899 | if (GetLastError() == NTE_EXISTS) | |
1900 | { | |
1901 | if (!CryptAcquireContextW(&hProv, (LPWSTR)container, MS_DEF_PROV_W, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET)) | |
1902 | { | |
1903 | DEBUG_printf(("5http_sspi_make_credentials: CryptAcquireContext failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1904 | ok = FALSE; | |
1905 | goto cleanup; | |
1906 | } | |
1907 | } | |
1908 | } | |
1909 | ||
1910 | 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"); | |
1911 | ||
1912 | if (!store) | |
1913 | { | |
1914 | DEBUG_printf(("5http_sspi_make_credentials: CertOpenSystemStore failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1915 | ok = FALSE; | |
1916 | goto cleanup; | |
1917 | } | |
1918 | ||
1919 | dwSize = 0; | |
1920 | ||
1921 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, NULL, &dwSize, NULL)) | |
1922 | { | |
1923 | DEBUG_printf(("5http_sspi_make_credentials: CertStrToName failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1924 | ok = FALSE; | |
1925 | goto cleanup; | |
1926 | } | |
1927 | ||
1928 | p = (PBYTE)malloc(dwSize); | |
1929 | ||
1930 | if (!p) | |
1931 | { | |
1932 | DEBUG_printf(("5http_sspi_make_credentials: malloc failed for %d bytes", dwSize)); | |
1933 | ok = FALSE; | |
1934 | goto cleanup; | |
1935 | } | |
1936 | ||
1937 | if (!CertStrToName(X509_ASN_ENCODING, common_name, CERT_OID_NAME_STR, NULL, p, &dwSize, NULL)) | |
1938 | { | |
1939 | DEBUG_printf(("5http_sspi_make_credentials: CertStrToName failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1940 | ok = FALSE; | |
1941 | goto cleanup; | |
1942 | } | |
1943 | ||
1944 | /* | |
1945 | * Create a private key and self-signed certificate... | |
1946 | */ | |
1947 | ||
1948 | if (!CryptGenKey(hProv, AT_KEYEXCHANGE, CRYPT_EXPORTABLE, &hKey)) | |
1949 | { | |
1950 | DEBUG_printf(("5http_sspi_make_credentials: CryptGenKey failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1951 | ok = FALSE; | |
1952 | goto cleanup; | |
1953 | } | |
1954 | ||
1955 | ZeroMemory(&kpi, sizeof(kpi)); | |
1956 | kpi.pwszContainerName = (LPWSTR)container; | |
1957 | kpi.pwszProvName = MS_DEF_PROV_W; | |
1958 | kpi.dwProvType = PROV_RSA_FULL; | |
1959 | kpi.dwFlags = CERT_SET_KEY_CONTEXT_PROP_ID; | |
1960 | kpi.dwKeySpec = AT_KEYEXCHANGE; | |
1961 | ||
1962 | GetSystemTime(&et); | |
1963 | et.wYear += years; | |
1964 | ||
1965 | ZeroMemory(&exts, sizeof(exts)); | |
1966 | ||
1967 | createdContext = CertCreateSelfSignCertificate(hProv, &sib, 0, &kpi, NULL, NULL, &et, &exts); | |
1968 | ||
1969 | if (!createdContext) | |
1970 | { | |
1971 | DEBUG_printf(("5http_sspi_make_credentials: CertCreateSelfSignCertificate failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1972 | ok = FALSE; | |
1973 | goto cleanup; | |
1974 | } | |
1975 | ||
1976 | /* | |
1977 | * Add the created context to the named store, and associate it with the named | |
1978 | * container... | |
1979 | */ | |
1980 | ||
1981 | if (!CertAddCertificateContextToStore(store, createdContext, CERT_STORE_ADD_REPLACE_EXISTING, &storedContext)) | |
1982 | { | |
1983 | DEBUG_printf(("5http_sspi_make_credentials: CertAddCertificateContextToStore failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1984 | ok = FALSE; | |
1985 | goto cleanup; | |
1986 | } | |
1987 | ||
1988 | ZeroMemory(&ckp, sizeof(ckp)); | |
1989 | ckp.pwszContainerName = (LPWSTR) container; | |
1990 | ckp.pwszProvName = MS_DEF_PROV_W; | |
1991 | ckp.dwProvType = PROV_RSA_FULL; | |
1992 | ckp.dwFlags = CRYPT_MACHINE_KEYSET; | |
1993 | ckp.dwKeySpec = AT_KEYEXCHANGE; | |
1994 | ||
1995 | if (!CertSetCertificateContextProperty(storedContext, CERT_KEY_PROV_INFO_PROP_ID, 0, &ckp)) | |
1996 | { | |
1997 | DEBUG_printf(("5http_sspi_make_credentials: CertSetCertificateContextProperty failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), GetLastError()))); | |
1998 | ok = FALSE; | |
1999 | goto cleanup; | |
2000 | } | |
2001 | ||
2002 | /* | |
2003 | * Get a handle to use the certificate... | |
2004 | */ | |
2005 | ||
2006 | ZeroMemory(&SchannelCred, sizeof(SchannelCred)); | |
2007 | ||
2008 | SchannelCred.dwVersion = SCHANNEL_CRED_VERSION; | |
2009 | SchannelCred.cCreds = 1; | |
2010 | SchannelCred.paCred = &storedContext; | |
2011 | ||
2012 | /* | |
2013 | * SSPI doesn't seem to like it if grbitEnabledProtocols is set for a client. | |
2014 | */ | |
2015 | ||
2016 | if (mode == _HTTP_MODE_SERVER) | |
2017 | SchannelCred.grbitEnabledProtocols = SP_PROT_SSL3TLS1; | |
2018 | ||
2019 | /* | |
2020 | * Create an SSPI credential. | |
2021 | */ | |
2022 | ||
2023 | Status = AcquireCredentialsHandle(NULL, UNISP_NAME, mode == _HTTP_MODE_SERVER ? SECPKG_CRED_INBOUND : SECPKG_CRED_OUTBOUND, NULL, &SchannelCred, NULL, NULL, &sspi->creds, &tsExpiry); | |
2024 | if (Status != SEC_E_OK) | |
2025 | { | |
2026 | DEBUG_printf(("5http_sspi_make_credentials: AcquireCredentialsHandle failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), Status))); | |
2027 | ok = FALSE; | |
2028 | goto cleanup; | |
2029 | } | |
2030 | ||
2031 | cleanup: | |
2032 | ||
2033 | /* | |
2034 | * Cleanup | |
2035 | */ | |
2036 | ||
2037 | if (hKey) | |
2038 | CryptDestroyKey(hKey); | |
2039 | ||
2040 | if (createdContext) | |
2041 | CertFreeCertificateContext(createdContext); | |
2042 | ||
2043 | if (storedContext) | |
2044 | CertFreeCertificateContext(storedContext); | |
2045 | ||
2046 | if (p) | |
2047 | free(p); | |
2048 | ||
2049 | if (store) | |
2050 | CertCloseStore(store, 0); | |
2051 | ||
2052 | if (hProv) | |
2053 | CryptReleaseContext(hProv, 0); | |
2054 | ||
2055 | return (ok); | |
2056 | } | |
2057 | ||
2058 | ||
2059 | /* | |
2060 | * 'http_sspi_server()' - Negotiate a TLS connection as a server. | |
2061 | */ | |
2062 | ||
2063 | static int /* O - 0 on success, -1 on failure */ | |
2064 | http_sspi_server(http_t *http, /* I - HTTP connection */ | |
2065 | const char *hostname) /* I - Hostname of server */ | |
2066 | { | |
2067 | _http_sspi_t *sspi = http->tls; /* I - SSPI data */ | |
2068 | char common_name[512]; /* Common name for cert */ | |
2069 | DWORD dwSSPIFlags; /* SSL connection attributes we want */ | |
2070 | DWORD dwSSPIOutFlags; /* SSL connection attributes we got */ | |
2071 | TimeStamp tsExpiry; /* Time stamp */ | |
2072 | SECURITY_STATUS scRet; /* SSPI Status */ | |
2073 | SecBufferDesc inBuffer; /* Array of SecBuffer structs */ | |
2074 | SecBuffer inBuffers[2]; /* Security package buffer */ | |
2075 | SecBufferDesc outBuffer; /* Array of SecBuffer structs */ | |
2076 | SecBuffer outBuffers[1]; /* Security package buffer */ | |
2077 | int num = 0; /* 32 bit status value */ | |
2078 | BOOL fInitContext = TRUE; /* Has the context been init'd? */ | |
2079 | int ret = 0; /* Return value */ | |
2080 | ||
2081 | ||
2082 | DEBUG_printf(("4http_sspi_server(http=%p, hostname=\"%s\")", http, hostname)); | |
2083 | ||
2084 | dwSSPIFlags = ASC_REQ_SEQUENCE_DETECT | | |
2085 | ASC_REQ_REPLAY_DETECT | | |
2086 | ASC_REQ_CONFIDENTIALITY | | |
2087 | ASC_REQ_EXTENDED_ERROR | | |
2088 | ASC_REQ_ALLOCATE_MEMORY | | |
2089 | ASC_REQ_STREAM; | |
2090 | ||
2091 | sspi->decryptBufferUsed = 0; | |
2092 | ||
2093 | /* | |
2094 | * Lookup the server certificate... | |
2095 | */ | |
2096 | ||
2097 | snprintf(common_name, sizeof(common_name), "CN=%s", hostname); | |
2098 | ||
2099 | if (!http_sspi_find_credentials(http, L"ServerContainer", common_name)) | |
2100 | if (!http_sspi_make_credentials(http->tls, L"ServerContainer", common_name, _HTTP_MODE_SERVER, 10)) | |
2101 | { | |
2102 | DEBUG_puts("5http_sspi_server: Unable to get server credentials."); | |
2103 | return (-1); | |
2104 | } | |
2105 | ||
2106 | /* | |
2107 | * Set OutBuffer for AcceptSecurityContext call | |
2108 | */ | |
2109 | ||
2110 | outBuffer.cBuffers = 1; | |
2111 | outBuffer.pBuffers = outBuffers; | |
2112 | outBuffer.ulVersion = SECBUFFER_VERSION; | |
2113 | ||
2114 | scRet = SEC_I_CONTINUE_NEEDED; | |
2115 | ||
2116 | while (scRet == SEC_I_CONTINUE_NEEDED || | |
2117 | scRet == SEC_E_INCOMPLETE_MESSAGE || | |
2118 | scRet == SEC_I_INCOMPLETE_CREDENTIALS) | |
2119 | { | |
2120 | if (sspi->decryptBufferUsed == 0 || scRet == SEC_E_INCOMPLETE_MESSAGE) | |
2121 | { | |
2122 | if (sspi->decryptBufferLength <= sspi->decryptBufferUsed) | |
2123 | { | |
2124 | BYTE *temp; /* New buffer */ | |
2125 | ||
2126 | if (sspi->decryptBufferLength >= 262144) | |
2127 | { | |
2128 | WSASetLastError(E_OUTOFMEMORY); | |
2129 | DEBUG_puts("5http_sspi_server: Decryption buffer too large (>256k)"); | |
2130 | return (-1); | |
2131 | } | |
2132 | ||
2133 | if ((temp = realloc(sspi->decryptBuffer, sspi->decryptBufferLength + 4096)) == NULL) | |
2134 | { | |
2135 | DEBUG_printf(("5http_sspi_server: Unable to allocate %d byte buffer.", sspi->decryptBufferLength + 4096)); | |
2136 | WSASetLastError(E_OUTOFMEMORY); | |
2137 | return (-1); | |
2138 | } | |
2139 | ||
2140 | sspi->decryptBufferLength += 4096; | |
2141 | sspi->decryptBuffer = temp; | |
2142 | } | |
2143 | ||
2144 | for (;;) | |
2145 | { | |
2146 | num = recv(http->fd, sspi->decryptBuffer + sspi->decryptBufferUsed, (int)(sspi->decryptBufferLength - sspi->decryptBufferUsed), 0); | |
2147 | ||
2148 | if (num == -1 && WSAGetLastError() == WSAEWOULDBLOCK) | |
2149 | Sleep(1); | |
2150 | else | |
2151 | break; | |
2152 | } | |
2153 | ||
2154 | if (num < 0) | |
2155 | { | |
2156 | DEBUG_printf(("5http_sspi_server: recv failed: %d", WSAGetLastError())); | |
2157 | return (-1); | |
2158 | } | |
2159 | else if (num == 0) | |
2160 | { | |
2161 | DEBUG_puts("5http_sspi_server: client disconnected"); | |
2162 | return (-1); | |
2163 | } | |
2164 | ||
2165 | DEBUG_printf(("5http_sspi_server: received %d (handshake) bytes from client.", num)); | |
2166 | sspi->decryptBufferUsed += num; | |
2167 | } | |
2168 | ||
2169 | /* | |
2170 | * InBuffers[1] is for getting extra data that SSPI/SCHANNEL doesn't process | |
2171 | * on this run around the loop. | |
2172 | */ | |
2173 | ||
2174 | inBuffers[0].pvBuffer = sspi->decryptBuffer; | |
2175 | inBuffers[0].cbBuffer = (unsigned long)sspi->decryptBufferUsed; | |
2176 | inBuffers[0].BufferType = SECBUFFER_TOKEN; | |
2177 | ||
2178 | inBuffers[1].pvBuffer = NULL; | |
2179 | inBuffers[1].cbBuffer = 0; | |
2180 | inBuffers[1].BufferType = SECBUFFER_EMPTY; | |
2181 | ||
2182 | inBuffer.cBuffers = 2; | |
2183 | inBuffer.pBuffers = inBuffers; | |
2184 | inBuffer.ulVersion = SECBUFFER_VERSION; | |
2185 | ||
2186 | /* | |
2187 | * Initialize these so if we fail, pvBuffer contains NULL, so we don't try to | |
2188 | * free random garbage at the quit. | |
2189 | */ | |
2190 | ||
2191 | outBuffers[0].pvBuffer = NULL; | |
2192 | outBuffers[0].BufferType = SECBUFFER_TOKEN; | |
2193 | outBuffers[0].cbBuffer = 0; | |
2194 | ||
2195 | scRet = AcceptSecurityContext(&sspi->creds, (fInitContext?NULL:&sspi->context), &inBuffer, dwSSPIFlags, SECURITY_NATIVE_DREP, (fInitContext?&sspi->context:NULL), &outBuffer, &dwSSPIOutFlags, &tsExpiry); | |
2196 | ||
2197 | fInitContext = FALSE; | |
2198 | ||
2199 | if (scRet == SEC_E_OK || | |
2200 | scRet == SEC_I_CONTINUE_NEEDED || | |
2201 | (FAILED(scRet) && ((dwSSPIOutFlags & ISC_RET_EXTENDED_ERROR) != 0))) | |
2202 | { | |
2203 | if (outBuffers[0].cbBuffer && outBuffers[0].pvBuffer) | |
2204 | { | |
2205 | /* | |
2206 | * Send response to server if there is one. | |
2207 | */ | |
2208 | ||
2209 | num = send(http->fd, outBuffers[0].pvBuffer, outBuffers[0].cbBuffer, 0); | |
2210 | ||
2211 | if (num <= 0) | |
2212 | { | |
2213 | DEBUG_printf(("5http_sspi_server: handshake send failed: %d", WSAGetLastError())); | |
2214 | return (-1); | |
2215 | } | |
2216 | ||
2217 | DEBUG_printf(("5http_sspi_server: sent %d handshake bytes to client.", outBuffers[0].cbBuffer)); | |
2218 | ||
2219 | FreeContextBuffer(outBuffers[0].pvBuffer); | |
2220 | outBuffers[0].pvBuffer = NULL; | |
2221 | } | |
2222 | } | |
2223 | ||
2224 | if (scRet == SEC_E_OK) | |
2225 | { | |
2226 | /* | |
2227 | * If there's extra data then save it for next time we go to decrypt. | |
2228 | */ | |
2229 | ||
2230 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
2231 | { | |
2232 | memcpy(sspi->decryptBuffer, (LPBYTE)(sspi->decryptBuffer + sspi->decryptBufferUsed - inBuffers[1].cbBuffer), inBuffers[1].cbBuffer); | |
2233 | sspi->decryptBufferUsed = inBuffers[1].cbBuffer; | |
2234 | } | |
2235 | else | |
2236 | { | |
2237 | sspi->decryptBufferUsed = 0; | |
2238 | } | |
2239 | break; | |
2240 | } | |
2241 | else if (FAILED(scRet) && scRet != SEC_E_INCOMPLETE_MESSAGE) | |
2242 | { | |
2243 | DEBUG_printf(("5http_sspi_server: AcceptSecurityContext failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
2244 | ret = -1; | |
2245 | break; | |
2246 | } | |
2247 | ||
2248 | if (scRet != SEC_E_INCOMPLETE_MESSAGE && | |
2249 | scRet != SEC_I_INCOMPLETE_CREDENTIALS) | |
2250 | { | |
2251 | if (inBuffers[1].BufferType == SECBUFFER_EXTRA) | |
2252 | { | |
2253 | memcpy(sspi->decryptBuffer, (LPBYTE)(sspi->decryptBuffer + sspi->decryptBufferUsed - inBuffers[1].cbBuffer), inBuffers[1].cbBuffer); | |
2254 | sspi->decryptBufferUsed = inBuffers[1].cbBuffer; | |
2255 | } | |
2256 | else | |
2257 | { | |
2258 | sspi->decryptBufferUsed = 0; | |
2259 | } | |
2260 | } | |
2261 | } | |
2262 | ||
2263 | if (!ret) | |
2264 | { | |
2265 | sspi->contextInitialized = TRUE; | |
2266 | ||
2267 | /* | |
2268 | * Find out how big the header will be: | |
2269 | */ | |
2270 | ||
2271 | scRet = QueryContextAttributes(&sspi->context, SECPKG_ATTR_STREAM_SIZES, &sspi->streamSizes); | |
2272 | ||
2273 | if (scRet != SEC_E_OK) | |
2274 | { | |
2275 | DEBUG_printf(("5http_sspi_server: QueryContextAttributes failed: %s", http_sspi_strerror(sspi->error, sizeof(sspi->error), scRet))); | |
2276 | ret = -1; | |
2277 | } | |
2278 | } | |
2279 | ||
2280 | return (ret); | |
2281 | } | |
2282 | ||
2283 | ||
2284 | /* | |
2285 | * 'http_sspi_strerror()' - Return a string for the specified error code. | |
2286 | */ | |
2287 | ||
2288 | static const char * /* O - String for error */ | |
2289 | http_sspi_strerror(char *buffer, /* I - Error message buffer */ | |
2290 | size_t bufsize, /* I - Size of buffer */ | |
2291 | DWORD code) /* I - Error code */ | |
2292 | { | |
2293 | if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, code, 0, buffer, bufsize, NULL)) | |
2294 | { | |
2295 | /* | |
2296 | * Strip trailing CR + LF... | |
2297 | */ | |
2298 | ||
2299 | char *ptr; /* Pointer into error message */ | |
2300 | ||
2301 | for (ptr = buffer + strlen(buffer) - 1; ptr >= buffer; ptr --) | |
2302 | if (*ptr == '\n' || *ptr == '\r') | |
2303 | *ptr = '\0'; | |
2304 | else | |
2305 | break; | |
2306 | } | |
2307 | else | |
2308 | snprintf(buffer, bufsize, "Unknown error %x", code); | |
2309 | ||
2310 | return (buffer); | |
2311 | } | |
2312 | ||
2313 | ||
2314 | /* | |
2315 | * 'http_sspi_verify()' - Verify a certificate. | |
2316 | */ | |
2317 | ||
2318 | static DWORD /* O - Error code (0 == No error) */ | |
2319 | http_sspi_verify( | |
2320 | PCCERT_CONTEXT cert, /* I - Server certificate */ | |
2321 | const char *common_name, /* I - Common name */ | |
2322 | DWORD dwCertFlags) /* I - Verification flags */ | |
2323 | { | |
2324 | HTTPSPolicyCallbackData httpsPolicy; /* HTTPS Policy Struct */ | |
2325 | CERT_CHAIN_POLICY_PARA policyPara; /* Cert chain policy parameters */ | |
2326 | CERT_CHAIN_POLICY_STATUS policyStatus;/* Cert chain policy status */ | |
2327 | CERT_CHAIN_PARA chainPara; /* Used for searching and matching criteria */ | |
2328 | PCCERT_CHAIN_CONTEXT chainContext = NULL; | |
2329 | /* Certificate chain */ | |
2330 | PWSTR commonNameUnicode = NULL; | |
2331 | /* Unicode common name */ | |
2332 | LPSTR rgszUsages[] = { szOID_PKIX_KP_SERVER_AUTH, | |
2333 | szOID_SERVER_GATED_CRYPTO, | |
2334 | szOID_SGC_NETSCAPE }; | |
2335 | /* How are we using this certificate? */ | |
2336 | DWORD cUsages = sizeof(rgszUsages) / sizeof(LPSTR); | |
2337 | /* Number of ites in rgszUsages */ | |
2338 | DWORD count; /* 32 bit count variable */ | |
2339 | DWORD status; /* Return value */ | |
2340 | #ifdef DEBUG | |
2341 | char error[1024]; /* Error message string */ | |
2342 | #endif /* DEBUG */ | |
2343 | ||
2344 | ||
2345 | if (!cert) | |
2346 | return (SEC_E_WRONG_PRINCIPAL); | |
2347 | ||
2348 | /* | |
2349 | * Convert common name to Unicode. | |
2350 | */ | |
2351 | ||
2352 | if (!common_name || !*common_name) | |
2353 | return (SEC_E_WRONG_PRINCIPAL); | |
2354 | ||
2355 | count = MultiByteToWideChar(CP_ACP, 0, common_name, -1, NULL, 0); | |
2356 | commonNameUnicode = LocalAlloc(LMEM_FIXED, count * sizeof(WCHAR)); | |
2357 | if (!commonNameUnicode) | |
2358 | return (SEC_E_INSUFFICIENT_MEMORY); | |
2359 | ||
2360 | if (!MultiByteToWideChar(CP_ACP, 0, common_name, -1, commonNameUnicode, count)) | |
2361 | { | |
2362 | LocalFree(commonNameUnicode); | |
2363 | return (SEC_E_WRONG_PRINCIPAL); | |
2364 | } | |
2365 | ||
2366 | /* | |
2367 | * Build certificate chain. | |
2368 | */ | |
2369 | ||
2370 | ZeroMemory(&chainPara, sizeof(chainPara)); | |
2371 | ||
2372 | chainPara.cbSize = sizeof(chainPara); | |
2373 | chainPara.RequestedUsage.dwType = USAGE_MATCH_TYPE_OR; | |
2374 | chainPara.RequestedUsage.Usage.cUsageIdentifier = cUsages; | |
2375 | chainPara.RequestedUsage.Usage.rgpszUsageIdentifier = rgszUsages; | |
2376 | ||
2377 | if (!CertGetCertificateChain(NULL, cert, NULL, cert->hCertStore, &chainPara, 0, NULL, &chainContext)) | |
2378 | { | |
2379 | status = GetLastError(); | |
2380 | ||
2381 | DEBUG_printf(("CertGetCertificateChain returned: %s", http_sspi_strerror(error, sizeof(error), status))); | |
2382 | ||
2383 | LocalFree(commonNameUnicode); | |
2384 | return (status); | |
2385 | } | |
2386 | ||
2387 | /* | |
2388 | * Validate certificate chain. | |
2389 | */ | |
2390 | ||
2391 | ZeroMemory(&httpsPolicy, sizeof(HTTPSPolicyCallbackData)); | |
2392 | httpsPolicy.cbStruct = sizeof(HTTPSPolicyCallbackData); | |
2393 | httpsPolicy.dwAuthType = AUTHTYPE_SERVER; | |
2394 | httpsPolicy.fdwChecks = dwCertFlags; | |
2395 | httpsPolicy.pwszServerName = commonNameUnicode; | |
2396 | ||
2397 | memset(&policyPara, 0, sizeof(policyPara)); | |
2398 | policyPara.cbSize = sizeof(policyPara); | |
2399 | policyPara.pvExtraPolicyPara = &httpsPolicy; | |
2400 | ||
2401 | memset(&policyStatus, 0, sizeof(policyStatus)); | |
2402 | policyStatus.cbSize = sizeof(policyStatus); | |
2403 | ||
2404 | if (!CertVerifyCertificateChainPolicy(CERT_CHAIN_POLICY_SSL, chainContext, &policyPara, &policyStatus)) | |
2405 | { | |
2406 | status = GetLastError(); | |
2407 | ||
2408 | DEBUG_printf(("CertVerifyCertificateChainPolicy returned %s", http_sspi_strerror(error, sizeof(error), status))); | |
2409 | } | |
2410 | else if (policyStatus.dwError) | |
2411 | status = policyStatus.dwError; | |
2412 | else | |
2413 | status = SEC_E_OK; | |
2414 | ||
2415 | if (chainContext) | |
2416 | CertFreeCertificateChain(chainContext); | |
2417 | ||
2418 | if (commonNameUnicode) | |
2419 | LocalFree(commonNameUnicode); | |
2420 | ||
2421 | return (status); | |
2422 | } |