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Commit | Line | Data |
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6fc6879b | 1 | /* |
81c85c06 | 2 | * SSL/TLS interface functions for OpenSSL |
080585c0 | 3 | * Copyright (c) 2004-2013, Jouni Malinen <j@w1.fi> |
6fc6879b | 4 | * |
0f3d578e JM |
5 | * This software may be distributed under the terms of the BSD license. |
6 | * See README for more details. | |
6fc6879b JM |
7 | */ |
8 | ||
9 | #include "includes.h" | |
10 | ||
11 | #ifndef CONFIG_SMARTCARD | |
12 | #ifndef OPENSSL_NO_ENGINE | |
1176ab6d | 13 | #ifndef ANDROID |
6fc6879b JM |
14 | #define OPENSSL_NO_ENGINE |
15 | #endif | |
16 | #endif | |
1176ab6d | 17 | #endif |
6fc6879b JM |
18 | |
19 | #include <openssl/ssl.h> | |
20 | #include <openssl/err.h> | |
21 | #include <openssl/pkcs12.h> | |
22 | #include <openssl/x509v3.h> | |
23 | #ifndef OPENSSL_NO_ENGINE | |
24 | #include <openssl/engine.h> | |
25 | #endif /* OPENSSL_NO_ENGINE */ | |
26 | ||
27 | #include "common.h" | |
00468b46 | 28 | #include "crypto.h" |
6fc6879b JM |
29 | #include "tls.h" |
30 | ||
31 | #if OPENSSL_VERSION_NUMBER >= 0x0090800fL | |
32 | #define OPENSSL_d2i_TYPE const unsigned char ** | |
33 | #else | |
34 | #define OPENSSL_d2i_TYPE unsigned char ** | |
35 | #endif | |
36 | ||
7c0e1e27 PS |
37 | #if defined(SSL_CTX_get_app_data) && defined(SSL_CTX_set_app_data) |
38 | #define OPENSSL_SUPPORTS_CTX_APP_DATA | |
39 | #endif | |
40 | ||
191a8ad7 | 41 | #ifdef SSL_F_SSL_SET_SESSION_TICKET_EXT |
0cf03892 JM |
42 | #ifdef SSL_OP_NO_TICKET |
43 | /* | |
44 | * Session ticket override patch was merged into OpenSSL 0.9.9 tree on | |
45 | * 2008-11-15. This version uses a bit different API compared to the old patch. | |
46 | */ | |
47 | #define CONFIG_OPENSSL_TICKET_OVERRIDE | |
48 | #endif | |
49 | #endif | |
50 | ||
080585c0 JM |
51 | #ifdef SSL_set_tlsext_status_type |
52 | #ifndef OPENSSL_NO_TLSEXT | |
53 | #define HAVE_OCSP | |
54 | #include <openssl/ocsp.h> | |
55 | #endif /* OPENSSL_NO_TLSEXT */ | |
56 | #endif /* SSL_set_tlsext_status_type */ | |
57 | ||
1d415f1f KR |
58 | #ifdef ANDROID |
59 | #include <openssl/pem.h> | |
60 | #include <keystore/keystore_get.h> | |
61 | ||
62 | static BIO * BIO_from_keystore(const char *key) | |
63 | { | |
64 | BIO *bio = NULL; | |
65 | uint8_t *value = NULL; | |
66 | int length = keystore_get(key, strlen(key), &value); | |
67 | if (length != -1 && (bio = BIO_new(BIO_s_mem())) != NULL) | |
68 | BIO_write(bio, value, length); | |
69 | free(value); | |
70 | return bio; | |
71 | } | |
72 | #endif /* ANDROID */ | |
73 | ||
6fc6879b JM |
74 | static int tls_openssl_ref_count = 0; |
75 | ||
7c0e1e27 | 76 | struct tls_context { |
00468b46 JM |
77 | void (*event_cb)(void *ctx, enum tls_event ev, |
78 | union tls_event_data *data); | |
79 | void *cb_ctx; | |
1b414f59 | 80 | int cert_in_cb; |
080585c0 | 81 | char *ocsp_stapling_response; |
00468b46 JM |
82 | }; |
83 | ||
7c0e1e27 | 84 | static struct tls_context *tls_global = NULL; |
00468b46 JM |
85 | |
86 | ||
6fc6879b | 87 | struct tls_connection { |
7c0e1e27 | 88 | struct tls_context *context; |
6fc6879b JM |
89 | SSL *ssl; |
90 | BIO *ssl_in, *ssl_out; | |
91 | #ifndef OPENSSL_NO_ENGINE | |
92 | ENGINE *engine; /* functional reference to the engine */ | |
93 | EVP_PKEY *private_key; /* the private key if using engine */ | |
94 | #endif /* OPENSSL_NO_ENGINE */ | |
01f809c7 | 95 | char *subject_match, *altsubject_match, *suffix_match; |
6fc6879b JM |
96 | int read_alerts, write_alerts, failed; |
97 | ||
98 | tls_session_ticket_cb session_ticket_cb; | |
99 | void *session_ticket_cb_ctx; | |
100 | ||
101 | /* SessionTicket received from OpenSSL hello_extension_cb (server) */ | |
102 | u8 *session_ticket; | |
103 | size_t session_ticket_len; | |
00468b46 | 104 | |
8d6399e4 JM |
105 | unsigned int ca_cert_verify:1; |
106 | unsigned int cert_probe:1; | |
107 | unsigned int server_cert_only:1; | |
51e3eafb | 108 | unsigned int server:1; |
00468b46 JM |
109 | |
110 | u8 srv_cert_hash[32]; | |
235279e7 JM |
111 | |
112 | unsigned int flags; | |
080585c0 JM |
113 | |
114 | X509 *peer_cert; | |
115 | X509 *peer_issuer; | |
6bf61fb2 | 116 | X509 *peer_issuer_issuer; |
6fc6879b JM |
117 | }; |
118 | ||
119 | ||
7c0e1e27 PS |
120 | static struct tls_context * tls_context_new(const struct tls_config *conf) |
121 | { | |
122 | struct tls_context *context = os_zalloc(sizeof(*context)); | |
123 | if (context == NULL) | |
124 | return NULL; | |
125 | if (conf) { | |
126 | context->event_cb = conf->event_cb; | |
127 | context->cb_ctx = conf->cb_ctx; | |
128 | context->cert_in_cb = conf->cert_in_cb; | |
129 | } | |
130 | return context; | |
131 | } | |
132 | ||
133 | ||
6fc6879b JM |
134 | #ifdef CONFIG_NO_STDOUT_DEBUG |
135 | ||
136 | static void _tls_show_errors(void) | |
137 | { | |
138 | unsigned long err; | |
139 | ||
140 | while ((err = ERR_get_error())) { | |
141 | /* Just ignore the errors, since stdout is disabled */ | |
142 | } | |
143 | } | |
144 | #define tls_show_errors(l, f, t) _tls_show_errors() | |
145 | ||
146 | #else /* CONFIG_NO_STDOUT_DEBUG */ | |
147 | ||
148 | static void tls_show_errors(int level, const char *func, const char *txt) | |
149 | { | |
150 | unsigned long err; | |
151 | ||
152 | wpa_printf(level, "OpenSSL: %s - %s %s", | |
153 | func, txt, ERR_error_string(ERR_get_error(), NULL)); | |
154 | ||
155 | while ((err = ERR_get_error())) { | |
156 | wpa_printf(MSG_INFO, "OpenSSL: pending error: %s", | |
157 | ERR_error_string(err, NULL)); | |
158 | } | |
159 | } | |
160 | ||
161 | #endif /* CONFIG_NO_STDOUT_DEBUG */ | |
162 | ||
163 | ||
164 | #ifdef CONFIG_NATIVE_WINDOWS | |
165 | ||
166 | /* Windows CryptoAPI and access to certificate stores */ | |
167 | #include <wincrypt.h> | |
168 | ||
169 | #ifdef __MINGW32_VERSION | |
170 | /* | |
171 | * MinGW does not yet include all the needed definitions for CryptoAPI, so | |
172 | * define here whatever extra is needed. | |
173 | */ | |
6fc6879b JM |
174 | #define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16) |
175 | #define CERT_STORE_READONLY_FLAG 0x00008000 | |
176 | #define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000 | |
6fc6879b JM |
177 | |
178 | #endif /* __MINGW32_VERSION */ | |
179 | ||
180 | ||
181 | struct cryptoapi_rsa_data { | |
182 | const CERT_CONTEXT *cert; | |
183 | HCRYPTPROV crypt_prov; | |
184 | DWORD key_spec; | |
185 | BOOL free_crypt_prov; | |
186 | }; | |
187 | ||
188 | ||
189 | static void cryptoapi_error(const char *msg) | |
190 | { | |
191 | wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u", | |
192 | msg, (unsigned int) GetLastError()); | |
193 | } | |
194 | ||
195 | ||
196 | static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from, | |
197 | unsigned char *to, RSA *rsa, int padding) | |
198 | { | |
199 | wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); | |
200 | return 0; | |
201 | } | |
202 | ||
203 | ||
204 | static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from, | |
205 | unsigned char *to, RSA *rsa, int padding) | |
206 | { | |
207 | wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); | |
208 | return 0; | |
209 | } | |
210 | ||
211 | ||
212 | static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from, | |
213 | unsigned char *to, RSA *rsa, int padding) | |
214 | { | |
215 | struct cryptoapi_rsa_data *priv = | |
216 | (struct cryptoapi_rsa_data *) rsa->meth->app_data; | |
217 | HCRYPTHASH hash; | |
218 | DWORD hash_size, len, i; | |
219 | unsigned char *buf = NULL; | |
220 | int ret = 0; | |
221 | ||
222 | if (priv == NULL) { | |
223 | RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, | |
224 | ERR_R_PASSED_NULL_PARAMETER); | |
225 | return 0; | |
226 | } | |
227 | ||
228 | if (padding != RSA_PKCS1_PADDING) { | |
229 | RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, | |
230 | RSA_R_UNKNOWN_PADDING_TYPE); | |
231 | return 0; | |
232 | } | |
233 | ||
234 | if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) { | |
235 | wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported", | |
236 | __func__); | |
237 | RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, | |
238 | RSA_R_INVALID_MESSAGE_LENGTH); | |
239 | return 0; | |
240 | } | |
241 | ||
242 | if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash)) | |
243 | { | |
244 | cryptoapi_error("CryptCreateHash failed"); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | len = sizeof(hash_size); | |
249 | if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len, | |
250 | 0)) { | |
251 | cryptoapi_error("CryptGetHashParam failed"); | |
252 | goto err; | |
253 | } | |
254 | ||
255 | if ((int) hash_size != flen) { | |
256 | wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)", | |
257 | (unsigned) hash_size, flen); | |
258 | RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, | |
259 | RSA_R_INVALID_MESSAGE_LENGTH); | |
260 | goto err; | |
261 | } | |
262 | if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) { | |
263 | cryptoapi_error("CryptSetHashParam failed"); | |
264 | goto err; | |
265 | } | |
266 | ||
267 | len = RSA_size(rsa); | |
268 | buf = os_malloc(len); | |
269 | if (buf == NULL) { | |
270 | RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE); | |
271 | goto err; | |
272 | } | |
273 | ||
274 | if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) { | |
275 | cryptoapi_error("CryptSignHash failed"); | |
276 | goto err; | |
277 | } | |
278 | ||
279 | for (i = 0; i < len; i++) | |
280 | to[i] = buf[len - i - 1]; | |
281 | ret = len; | |
282 | ||
283 | err: | |
284 | os_free(buf); | |
285 | CryptDestroyHash(hash); | |
286 | ||
287 | return ret; | |
288 | } | |
289 | ||
290 | ||
291 | static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from, | |
292 | unsigned char *to, RSA *rsa, int padding) | |
293 | { | |
294 | wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); | |
295 | return 0; | |
296 | } | |
297 | ||
298 | ||
299 | static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv) | |
300 | { | |
301 | if (priv == NULL) | |
302 | return; | |
303 | if (priv->crypt_prov && priv->free_crypt_prov) | |
304 | CryptReleaseContext(priv->crypt_prov, 0); | |
305 | if (priv->cert) | |
306 | CertFreeCertificateContext(priv->cert); | |
307 | os_free(priv); | |
308 | } | |
309 | ||
310 | ||
311 | static int cryptoapi_finish(RSA *rsa) | |
312 | { | |
313 | cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data); | |
314 | os_free((void *) rsa->meth); | |
315 | rsa->meth = NULL; | |
316 | return 1; | |
317 | } | |
318 | ||
319 | ||
320 | static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store) | |
321 | { | |
322 | HCERTSTORE cs; | |
323 | const CERT_CONTEXT *ret = NULL; | |
324 | ||
325 | cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0, | |
326 | store | CERT_STORE_OPEN_EXISTING_FLAG | | |
327 | CERT_STORE_READONLY_FLAG, L"MY"); | |
328 | if (cs == NULL) { | |
329 | cryptoapi_error("Failed to open 'My system store'"); | |
330 | return NULL; | |
331 | } | |
332 | ||
333 | if (strncmp(name, "cert://", 7) == 0) { | |
334 | unsigned short wbuf[255]; | |
335 | MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255); | |
336 | ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING | | |
337 | PKCS_7_ASN_ENCODING, | |
338 | 0, CERT_FIND_SUBJECT_STR, | |
339 | wbuf, NULL); | |
340 | } else if (strncmp(name, "hash://", 7) == 0) { | |
341 | CRYPT_HASH_BLOB blob; | |
342 | int len; | |
343 | const char *hash = name + 7; | |
344 | unsigned char *buf; | |
345 | ||
346 | len = os_strlen(hash) / 2; | |
347 | buf = os_malloc(len); | |
348 | if (buf && hexstr2bin(hash, buf, len) == 0) { | |
349 | blob.cbData = len; | |
350 | blob.pbData = buf; | |
351 | ret = CertFindCertificateInStore(cs, | |
352 | X509_ASN_ENCODING | | |
353 | PKCS_7_ASN_ENCODING, | |
354 | 0, CERT_FIND_HASH, | |
355 | &blob, NULL); | |
356 | } | |
357 | os_free(buf); | |
358 | } | |
359 | ||
360 | CertCloseStore(cs, 0); | |
361 | ||
362 | return ret; | |
363 | } | |
364 | ||
365 | ||
366 | static int tls_cryptoapi_cert(SSL *ssl, const char *name) | |
367 | { | |
368 | X509 *cert = NULL; | |
369 | RSA *rsa = NULL, *pub_rsa; | |
370 | struct cryptoapi_rsa_data *priv; | |
371 | RSA_METHOD *rsa_meth; | |
372 | ||
373 | if (name == NULL || | |
374 | (strncmp(name, "cert://", 7) != 0 && | |
375 | strncmp(name, "hash://", 7) != 0)) | |
376 | return -1; | |
377 | ||
378 | priv = os_zalloc(sizeof(*priv)); | |
379 | rsa_meth = os_zalloc(sizeof(*rsa_meth)); | |
380 | if (priv == NULL || rsa_meth == NULL) { | |
381 | wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory " | |
382 | "for CryptoAPI RSA method"); | |
383 | os_free(priv); | |
384 | os_free(rsa_meth); | |
385 | return -1; | |
386 | } | |
387 | ||
388 | priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER); | |
389 | if (priv->cert == NULL) { | |
390 | priv->cert = cryptoapi_find_cert( | |
391 | name, CERT_SYSTEM_STORE_LOCAL_MACHINE); | |
392 | } | |
393 | if (priv->cert == NULL) { | |
394 | wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate " | |
395 | "'%s'", name); | |
396 | goto err; | |
397 | } | |
398 | ||
399 | cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &priv->cert->pbCertEncoded, | |
400 | priv->cert->cbCertEncoded); | |
401 | if (cert == NULL) { | |
402 | wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER " | |
403 | "encoding"); | |
404 | goto err; | |
405 | } | |
406 | ||
6fc6879b JM |
407 | if (!CryptAcquireCertificatePrivateKey(priv->cert, |
408 | CRYPT_ACQUIRE_COMPARE_KEY_FLAG, | |
409 | NULL, &priv->crypt_prov, | |
410 | &priv->key_spec, | |
411 | &priv->free_crypt_prov)) { | |
412 | cryptoapi_error("Failed to acquire a private key for the " | |
413 | "certificate"); | |
414 | goto err; | |
415 | } | |
416 | ||
417 | rsa_meth->name = "Microsoft CryptoAPI RSA Method"; | |
418 | rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc; | |
419 | rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec; | |
420 | rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc; | |
421 | rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec; | |
422 | rsa_meth->finish = cryptoapi_finish; | |
423 | rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK; | |
424 | rsa_meth->app_data = (char *) priv; | |
425 | ||
426 | rsa = RSA_new(); | |
427 | if (rsa == NULL) { | |
428 | SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, | |
429 | ERR_R_MALLOC_FAILURE); | |
430 | goto err; | |
431 | } | |
432 | ||
433 | if (!SSL_use_certificate(ssl, cert)) { | |
434 | RSA_free(rsa); | |
435 | rsa = NULL; | |
436 | goto err; | |
437 | } | |
438 | pub_rsa = cert->cert_info->key->pkey->pkey.rsa; | |
439 | X509_free(cert); | |
440 | cert = NULL; | |
441 | ||
442 | rsa->n = BN_dup(pub_rsa->n); | |
443 | rsa->e = BN_dup(pub_rsa->e); | |
444 | if (!RSA_set_method(rsa, rsa_meth)) | |
445 | goto err; | |
446 | ||
447 | if (!SSL_use_RSAPrivateKey(ssl, rsa)) | |
448 | goto err; | |
449 | RSA_free(rsa); | |
450 | ||
451 | return 0; | |
452 | ||
453 | err: | |
454 | if (cert) | |
455 | X509_free(cert); | |
456 | if (rsa) | |
457 | RSA_free(rsa); | |
458 | else { | |
459 | os_free(rsa_meth); | |
460 | cryptoapi_free_data(priv); | |
461 | } | |
462 | return -1; | |
463 | } | |
464 | ||
465 | ||
466 | static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name) | |
467 | { | |
468 | HCERTSTORE cs; | |
469 | PCCERT_CONTEXT ctx = NULL; | |
470 | X509 *cert; | |
471 | char buf[128]; | |
472 | const char *store; | |
473 | #ifdef UNICODE | |
474 | WCHAR *wstore; | |
475 | #endif /* UNICODE */ | |
476 | ||
6fc6879b JM |
477 | if (name == NULL || strncmp(name, "cert_store://", 13) != 0) |
478 | return -1; | |
479 | ||
480 | store = name + 13; | |
481 | #ifdef UNICODE | |
482 | wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR)); | |
483 | if (wstore == NULL) | |
484 | return -1; | |
485 | wsprintf(wstore, L"%S", store); | |
486 | cs = CertOpenSystemStore(0, wstore); | |
487 | os_free(wstore); | |
488 | #else /* UNICODE */ | |
489 | cs = CertOpenSystemStore(0, store); | |
490 | #endif /* UNICODE */ | |
491 | if (cs == NULL) { | |
492 | wpa_printf(MSG_DEBUG, "%s: failed to open system cert store " | |
493 | "'%s': error=%d", __func__, store, | |
494 | (int) GetLastError()); | |
495 | return -1; | |
496 | } | |
497 | ||
498 | while ((ctx = CertEnumCertificatesInStore(cs, ctx))) { | |
499 | cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ctx->pbCertEncoded, | |
500 | ctx->cbCertEncoded); | |
501 | if (cert == NULL) { | |
502 | wpa_printf(MSG_INFO, "CryptoAPI: Could not process " | |
503 | "X509 DER encoding for CA cert"); | |
504 | continue; | |
505 | } | |
506 | ||
507 | X509_NAME_oneline(X509_get_subject_name(cert), buf, | |
508 | sizeof(buf)); | |
509 | wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for " | |
510 | "system certificate store: subject='%s'", buf); | |
511 | ||
512 | if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { | |
513 | tls_show_errors(MSG_WARNING, __func__, | |
514 | "Failed to add ca_cert to OpenSSL " | |
515 | "certificate store"); | |
516 | } | |
517 | ||
518 | X509_free(cert); | |
519 | } | |
520 | ||
521 | if (!CertCloseStore(cs, 0)) { | |
522 | wpa_printf(MSG_DEBUG, "%s: failed to close system cert store " | |
523 | "'%s': error=%d", __func__, name + 13, | |
524 | (int) GetLastError()); | |
525 | } | |
526 | ||
527 | return 0; | |
528 | } | |
529 | ||
530 | ||
531 | #else /* CONFIG_NATIVE_WINDOWS */ | |
532 | ||
533 | static int tls_cryptoapi_cert(SSL *ssl, const char *name) | |
534 | { | |
535 | return -1; | |
536 | } | |
537 | ||
538 | #endif /* CONFIG_NATIVE_WINDOWS */ | |
539 | ||
540 | ||
541 | static void ssl_info_cb(const SSL *ssl, int where, int ret) | |
542 | { | |
543 | const char *str; | |
544 | int w; | |
545 | ||
546 | wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret); | |
547 | w = where & ~SSL_ST_MASK; | |
548 | if (w & SSL_ST_CONNECT) | |
549 | str = "SSL_connect"; | |
550 | else if (w & SSL_ST_ACCEPT) | |
551 | str = "SSL_accept"; | |
552 | else | |
553 | str = "undefined"; | |
554 | ||
555 | if (where & SSL_CB_LOOP) { | |
556 | wpa_printf(MSG_DEBUG, "SSL: %s:%s", | |
557 | str, SSL_state_string_long(ssl)); | |
558 | } else if (where & SSL_CB_ALERT) { | |
7c0e1e27 | 559 | struct tls_connection *conn = SSL_get_app_data((SSL *) ssl); |
6fc6879b JM |
560 | wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s", |
561 | where & SSL_CB_READ ? | |
562 | "read (remote end reported an error)" : | |
563 | "write (local SSL3 detected an error)", | |
564 | SSL_alert_type_string_long(ret), | |
565 | SSL_alert_desc_string_long(ret)); | |
566 | if ((ret >> 8) == SSL3_AL_FATAL) { | |
6fc6879b JM |
567 | if (where & SSL_CB_READ) |
568 | conn->read_alerts++; | |
569 | else | |
570 | conn->write_alerts++; | |
571 | } | |
7c0e1e27 | 572 | if (conn->context->event_cb != NULL) { |
dd7fec1f | 573 | union tls_event_data ev; |
7c0e1e27 | 574 | struct tls_context *context = conn->context; |
dd7fec1f PS |
575 | os_memset(&ev, 0, sizeof(ev)); |
576 | ev.alert.is_local = !(where & SSL_CB_READ); | |
577 | ev.alert.type = SSL_alert_type_string_long(ret); | |
578 | ev.alert.description = SSL_alert_desc_string_long(ret); | |
7c0e1e27 | 579 | context->event_cb(context->cb_ctx, TLS_ALERT, &ev); |
dd7fec1f | 580 | } |
6fc6879b JM |
581 | } else if (where & SSL_CB_EXIT && ret <= 0) { |
582 | wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s", | |
583 | str, ret == 0 ? "failed" : "error", | |
584 | SSL_state_string_long(ssl)); | |
585 | } | |
586 | } | |
587 | ||
588 | ||
589 | #ifndef OPENSSL_NO_ENGINE | |
590 | /** | |
591 | * tls_engine_load_dynamic_generic - load any openssl engine | |
592 | * @pre: an array of commands and values that load an engine initialized | |
593 | * in the engine specific function | |
594 | * @post: an array of commands and values that initialize an already loaded | |
595 | * engine (or %NULL if not required) | |
596 | * @id: the engine id of the engine to load (only required if post is not %NULL | |
597 | * | |
598 | * This function is a generic function that loads any openssl engine. | |
599 | * | |
600 | * Returns: 0 on success, -1 on failure | |
601 | */ | |
602 | static int tls_engine_load_dynamic_generic(const char *pre[], | |
603 | const char *post[], const char *id) | |
604 | { | |
605 | ENGINE *engine; | |
606 | const char *dynamic_id = "dynamic"; | |
607 | ||
608 | engine = ENGINE_by_id(id); | |
609 | if (engine) { | |
610 | ENGINE_free(engine); | |
611 | wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already " | |
612 | "available", id); | |
613 | return 0; | |
614 | } | |
615 | ERR_clear_error(); | |
616 | ||
617 | engine = ENGINE_by_id(dynamic_id); | |
618 | if (engine == NULL) { | |
619 | wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]", | |
620 | dynamic_id, | |
621 | ERR_error_string(ERR_get_error(), NULL)); | |
622 | return -1; | |
623 | } | |
624 | ||
625 | /* Perform the pre commands. This will load the engine. */ | |
626 | while (pre && pre[0]) { | |
627 | wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]); | |
628 | if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) { | |
629 | wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: " | |
630 | "%s %s [%s]", pre[0], pre[1], | |
631 | ERR_error_string(ERR_get_error(), NULL)); | |
632 | ENGINE_free(engine); | |
633 | return -1; | |
634 | } | |
635 | pre += 2; | |
636 | } | |
637 | ||
638 | /* | |
639 | * Free the reference to the "dynamic" engine. The loaded engine can | |
640 | * now be looked up using ENGINE_by_id(). | |
641 | */ | |
642 | ENGINE_free(engine); | |
643 | ||
644 | engine = ENGINE_by_id(id); | |
645 | if (engine == NULL) { | |
646 | wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]", | |
647 | id, ERR_error_string(ERR_get_error(), NULL)); | |
648 | return -1; | |
649 | } | |
650 | ||
651 | while (post && post[0]) { | |
652 | wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]); | |
653 | if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) { | |
654 | wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:" | |
655 | " %s %s [%s]", post[0], post[1], | |
656 | ERR_error_string(ERR_get_error(), NULL)); | |
657 | ENGINE_remove(engine); | |
658 | ENGINE_free(engine); | |
659 | return -1; | |
660 | } | |
661 | post += 2; | |
662 | } | |
663 | ENGINE_free(engine); | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
668 | ||
669 | /** | |
670 | * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc | |
671 | * @pkcs11_so_path: pksc11_so_path from the configuration | |
672 | * @pcks11_module_path: pkcs11_module_path from the configuration | |
673 | */ | |
674 | static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path, | |
675 | const char *pkcs11_module_path) | |
676 | { | |
677 | char *engine_id = "pkcs11"; | |
678 | const char *pre_cmd[] = { | |
679 | "SO_PATH", NULL /* pkcs11_so_path */, | |
680 | "ID", NULL /* engine_id */, | |
681 | "LIST_ADD", "1", | |
682 | /* "NO_VCHECK", "1", */ | |
683 | "LOAD", NULL, | |
684 | NULL, NULL | |
685 | }; | |
686 | const char *post_cmd[] = { | |
687 | "MODULE_PATH", NULL /* pkcs11_module_path */, | |
688 | NULL, NULL | |
689 | }; | |
690 | ||
691 | if (!pkcs11_so_path || !pkcs11_module_path) | |
692 | return 0; | |
693 | ||
694 | pre_cmd[1] = pkcs11_so_path; | |
695 | pre_cmd[3] = engine_id; | |
696 | post_cmd[1] = pkcs11_module_path; | |
697 | ||
698 | wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s", | |
699 | pkcs11_so_path); | |
700 | ||
701 | return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id); | |
702 | } | |
703 | ||
704 | ||
705 | /** | |
706 | * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc | |
707 | * @opensc_so_path: opensc_so_path from the configuration | |
708 | */ | |
709 | static int tls_engine_load_dynamic_opensc(const char *opensc_so_path) | |
710 | { | |
711 | char *engine_id = "opensc"; | |
712 | const char *pre_cmd[] = { | |
713 | "SO_PATH", NULL /* opensc_so_path */, | |
714 | "ID", NULL /* engine_id */, | |
715 | "LIST_ADD", "1", | |
716 | "LOAD", NULL, | |
717 | NULL, NULL | |
718 | }; | |
719 | ||
720 | if (!opensc_so_path) | |
721 | return 0; | |
722 | ||
723 | pre_cmd[1] = opensc_so_path; | |
724 | pre_cmd[3] = engine_id; | |
725 | ||
726 | wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s", | |
727 | opensc_so_path); | |
728 | ||
729 | return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id); | |
730 | } | |
731 | #endif /* OPENSSL_NO_ENGINE */ | |
732 | ||
733 | ||
734 | void * tls_init(const struct tls_config *conf) | |
735 | { | |
736 | SSL_CTX *ssl; | |
7c0e1e27 | 737 | struct tls_context *context; |
6fc6879b JM |
738 | |
739 | if (tls_openssl_ref_count == 0) { | |
7c0e1e27 PS |
740 | tls_global = context = tls_context_new(conf); |
741 | if (context == NULL) | |
00468b46 | 742 | return NULL; |
76f04b38 JM |
743 | #ifdef CONFIG_FIPS |
744 | #ifdef OPENSSL_FIPS | |
cf123d7f | 745 | if (conf && conf->fips_mode) { |
76f04b38 JM |
746 | if (!FIPS_mode_set(1)) { |
747 | wpa_printf(MSG_ERROR, "Failed to enable FIPS " | |
748 | "mode"); | |
749 | ERR_load_crypto_strings(); | |
750 | ERR_print_errors_fp(stderr); | |
b36540db JM |
751 | os_free(tls_global); |
752 | tls_global = NULL; | |
76f04b38 JM |
753 | return NULL; |
754 | } else | |
755 | wpa_printf(MSG_INFO, "Running in FIPS mode"); | |
756 | } | |
757 | #else /* OPENSSL_FIPS */ | |
cf123d7f | 758 | if (conf && conf->fips_mode) { |
76f04b38 JM |
759 | wpa_printf(MSG_ERROR, "FIPS mode requested, but not " |
760 | "supported"); | |
b36540db JM |
761 | os_free(tls_global); |
762 | tls_global = NULL; | |
76f04b38 JM |
763 | return NULL; |
764 | } | |
765 | #endif /* OPENSSL_FIPS */ | |
766 | #endif /* CONFIG_FIPS */ | |
6fc6879b JM |
767 | SSL_load_error_strings(); |
768 | SSL_library_init(); | |
4bb3377b | 769 | #if (OPENSSL_VERSION_NUMBER >= 0x0090800fL) && !defined(OPENSSL_NO_SHA256) |
e1ffdfc1 JM |
770 | EVP_add_digest(EVP_sha256()); |
771 | #endif /* OPENSSL_NO_SHA256 */ | |
6fc6879b JM |
772 | /* TODO: if /dev/urandom is available, PRNG is seeded |
773 | * automatically. If this is not the case, random data should | |
774 | * be added here. */ | |
775 | ||
776 | #ifdef PKCS12_FUNCS | |
1056dad7 JM |
777 | #ifndef OPENSSL_NO_RC2 |
778 | /* | |
779 | * 40-bit RC2 is commonly used in PKCS#12 files, so enable it. | |
780 | * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8 | |
781 | * versions, but it looks like OpenSSL 1.0.0 does not do that | |
782 | * anymore. | |
783 | */ | |
784 | EVP_add_cipher(EVP_rc2_40_cbc()); | |
785 | #endif /* OPENSSL_NO_RC2 */ | |
6fc6879b JM |
786 | PKCS12_PBE_add(); |
787 | #endif /* PKCS12_FUNCS */ | |
7c0e1e27 PS |
788 | } else { |
789 | context = tls_global; | |
790 | #ifdef OPENSSL_SUPPORTS_CTX_APP_DATA | |
791 | /* Newer OpenSSL can store app-data per-SSL */ | |
792 | context = tls_context_new(conf); | |
793 | if (context == NULL) | |
794 | return NULL; | |
795 | #endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */ | |
6fc6879b JM |
796 | } |
797 | tls_openssl_ref_count++; | |
798 | ||
799 | ssl = SSL_CTX_new(TLSv1_method()); | |
7c0e1e27 PS |
800 | if (ssl == NULL) { |
801 | tls_openssl_ref_count--; | |
a288da61 JM |
802 | #ifdef OPENSSL_SUPPORTS_CTX_APP_DATA |
803 | if (context != tls_global) | |
804 | os_free(context); | |
805 | #endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */ | |
7c0e1e27 PS |
806 | if (tls_openssl_ref_count == 0) { |
807 | os_free(tls_global); | |
808 | tls_global = NULL; | |
7c0e1e27 | 809 | } |
6fc6879b | 810 | return NULL; |
7c0e1e27 | 811 | } |
6fc6879b JM |
812 | |
813 | SSL_CTX_set_info_callback(ssl, ssl_info_cb); | |
7c0e1e27 PS |
814 | #ifdef OPENSSL_SUPPORTS_CTX_APP_DATA |
815 | SSL_CTX_set_app_data(ssl, context); | |
816 | #endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */ | |
6fc6879b JM |
817 | |
818 | #ifndef OPENSSL_NO_ENGINE | |
819 | if (conf && | |
820 | (conf->opensc_engine_path || conf->pkcs11_engine_path || | |
821 | conf->pkcs11_module_path)) { | |
822 | wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine"); | |
823 | ERR_load_ENGINE_strings(); | |
824 | ENGINE_load_dynamic(); | |
825 | ||
826 | if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) || | |
827 | tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path, | |
828 | conf->pkcs11_module_path)) { | |
829 | tls_deinit(ssl); | |
830 | return NULL; | |
831 | } | |
832 | } | |
833 | #endif /* OPENSSL_NO_ENGINE */ | |
834 | ||
835 | return ssl; | |
836 | } | |
837 | ||
838 | ||
839 | void tls_deinit(void *ssl_ctx) | |
840 | { | |
841 | SSL_CTX *ssl = ssl_ctx; | |
7c0e1e27 PS |
842 | #ifdef OPENSSL_SUPPORTS_CTX_APP_DATA |
843 | struct tls_context *context = SSL_CTX_get_app_data(ssl); | |
844 | if (context != tls_global) | |
845 | os_free(context); | |
846 | #endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */ | |
6fc6879b JM |
847 | SSL_CTX_free(ssl); |
848 | ||
849 | tls_openssl_ref_count--; | |
850 | if (tls_openssl_ref_count == 0) { | |
851 | #ifndef OPENSSL_NO_ENGINE | |
852 | ENGINE_cleanup(); | |
853 | #endif /* OPENSSL_NO_ENGINE */ | |
854 | CRYPTO_cleanup_all_ex_data(); | |
855 | ERR_remove_state(0); | |
856 | ERR_free_strings(); | |
857 | EVP_cleanup(); | |
080585c0 JM |
858 | os_free(tls_global->ocsp_stapling_response); |
859 | tls_global->ocsp_stapling_response = NULL; | |
00468b46 JM |
860 | os_free(tls_global); |
861 | tls_global = NULL; | |
6fc6879b JM |
862 | } |
863 | } | |
864 | ||
865 | ||
866 | static int tls_engine_init(struct tls_connection *conn, const char *engine_id, | |
e59c91af DS |
867 | const char *pin, const char *key_id, |
868 | const char *cert_id, const char *ca_cert_id) | |
6fc6879b JM |
869 | { |
870 | #ifndef OPENSSL_NO_ENGINE | |
871 | int ret = -1; | |
872 | if (engine_id == NULL) { | |
873 | wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set"); | |
874 | return -1; | |
875 | } | |
1176ab6d | 876 | #ifndef ANDROID |
6fc6879b JM |
877 | if (pin == NULL) { |
878 | wpa_printf(MSG_ERROR, "ENGINE: Smartcard PIN not set"); | |
879 | return -1; | |
880 | } | |
1176ab6d | 881 | #endif |
6fc6879b JM |
882 | if (key_id == NULL) { |
883 | wpa_printf(MSG_ERROR, "ENGINE: Key Id not set"); | |
884 | return -1; | |
885 | } | |
886 | ||
887 | ERR_clear_error(); | |
1176ab6d KR |
888 | #ifdef ANDROID |
889 | ENGINE_load_dynamic(); | |
890 | #endif | |
6fc6879b JM |
891 | conn->engine = ENGINE_by_id(engine_id); |
892 | if (!conn->engine) { | |
893 | wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]", | |
894 | engine_id, ERR_error_string(ERR_get_error(), NULL)); | |
895 | goto err; | |
896 | } | |
897 | if (ENGINE_init(conn->engine) != 1) { | |
898 | wpa_printf(MSG_ERROR, "ENGINE: engine init failed " | |
899 | "(engine: %s) [%s]", engine_id, | |
900 | ERR_error_string(ERR_get_error(), NULL)); | |
901 | goto err; | |
902 | } | |
903 | wpa_printf(MSG_DEBUG, "ENGINE: engine initialized"); | |
904 | ||
1176ab6d | 905 | #ifndef ANDROID |
6fc6879b JM |
906 | if (ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) { |
907 | wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]", | |
908 | ERR_error_string(ERR_get_error(), NULL)); | |
909 | goto err; | |
910 | } | |
1176ab6d | 911 | #endif |
e59c91af | 912 | /* load private key first in-case PIN is required for cert */ |
6fc6879b JM |
913 | conn->private_key = ENGINE_load_private_key(conn->engine, |
914 | key_id, NULL, NULL); | |
915 | if (!conn->private_key) { | |
916 | wpa_printf(MSG_ERROR, "ENGINE: cannot load private key with id" | |
917 | " '%s' [%s]", key_id, | |
918 | ERR_error_string(ERR_get_error(), NULL)); | |
919 | ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; | |
920 | goto err; | |
921 | } | |
e59c91af DS |
922 | |
923 | /* handle a certificate and/or CA certificate */ | |
924 | if (cert_id || ca_cert_id) { | |
925 | const char *cmd_name = "LOAD_CERT_CTRL"; | |
926 | ||
927 | /* test if the engine supports a LOAD_CERT_CTRL */ | |
928 | if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME, | |
929 | 0, (void *)cmd_name, NULL)) { | |
930 | wpa_printf(MSG_ERROR, "ENGINE: engine does not support" | |
931 | " loading certificates"); | |
932 | ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; | |
933 | goto err; | |
934 | } | |
935 | } | |
936 | ||
6fc6879b JM |
937 | return 0; |
938 | ||
939 | err: | |
940 | if (conn->engine) { | |
941 | ENGINE_free(conn->engine); | |
942 | conn->engine = NULL; | |
943 | } | |
944 | ||
945 | if (conn->private_key) { | |
946 | EVP_PKEY_free(conn->private_key); | |
947 | conn->private_key = NULL; | |
948 | } | |
949 | ||
950 | return ret; | |
951 | #else /* OPENSSL_NO_ENGINE */ | |
952 | return 0; | |
953 | #endif /* OPENSSL_NO_ENGINE */ | |
954 | } | |
955 | ||
956 | ||
957 | static void tls_engine_deinit(struct tls_connection *conn) | |
958 | { | |
959 | #ifndef OPENSSL_NO_ENGINE | |
960 | wpa_printf(MSG_DEBUG, "ENGINE: engine deinit"); | |
961 | if (conn->private_key) { | |
962 | EVP_PKEY_free(conn->private_key); | |
963 | conn->private_key = NULL; | |
964 | } | |
965 | if (conn->engine) { | |
966 | ENGINE_finish(conn->engine); | |
967 | conn->engine = NULL; | |
968 | } | |
969 | #endif /* OPENSSL_NO_ENGINE */ | |
970 | } | |
971 | ||
972 | ||
973 | int tls_get_errors(void *ssl_ctx) | |
974 | { | |
975 | int count = 0; | |
976 | unsigned long err; | |
977 | ||
978 | while ((err = ERR_get_error())) { | |
979 | wpa_printf(MSG_INFO, "TLS - SSL error: %s", | |
980 | ERR_error_string(err, NULL)); | |
981 | count++; | |
982 | } | |
983 | ||
984 | return count; | |
985 | } | |
986 | ||
987 | struct tls_connection * tls_connection_init(void *ssl_ctx) | |
988 | { | |
989 | SSL_CTX *ssl = ssl_ctx; | |
990 | struct tls_connection *conn; | |
fca25ef4 | 991 | long options; |
7c0e1e27 PS |
992 | struct tls_context *context = tls_global; |
993 | #ifdef OPENSSL_SUPPORTS_CTX_APP_DATA | |
994 | context = SSL_CTX_get_app_data(ssl); | |
995 | #endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */ | |
6fc6879b JM |
996 | |
997 | conn = os_zalloc(sizeof(*conn)); | |
998 | if (conn == NULL) | |
999 | return NULL; | |
1000 | conn->ssl = SSL_new(ssl); | |
1001 | if (conn->ssl == NULL) { | |
1002 | tls_show_errors(MSG_INFO, __func__, | |
1003 | "Failed to initialize new SSL connection"); | |
1004 | os_free(conn); | |
1005 | return NULL; | |
1006 | } | |
1007 | ||
7c0e1e27 | 1008 | conn->context = context; |
6fc6879b | 1009 | SSL_set_app_data(conn->ssl, conn); |
fca25ef4 JM |
1010 | options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | |
1011 | SSL_OP_SINGLE_DH_USE; | |
1012 | #ifdef SSL_OP_NO_COMPRESSION | |
1013 | options |= SSL_OP_NO_COMPRESSION; | |
1014 | #endif /* SSL_OP_NO_COMPRESSION */ | |
1015 | SSL_set_options(conn->ssl, options); | |
6fc6879b JM |
1016 | |
1017 | conn->ssl_in = BIO_new(BIO_s_mem()); | |
1018 | if (!conn->ssl_in) { | |
1019 | tls_show_errors(MSG_INFO, __func__, | |
1020 | "Failed to create a new BIO for ssl_in"); | |
1021 | SSL_free(conn->ssl); | |
1022 | os_free(conn); | |
1023 | return NULL; | |
1024 | } | |
1025 | ||
1026 | conn->ssl_out = BIO_new(BIO_s_mem()); | |
1027 | if (!conn->ssl_out) { | |
1028 | tls_show_errors(MSG_INFO, __func__, | |
1029 | "Failed to create a new BIO for ssl_out"); | |
1030 | SSL_free(conn->ssl); | |
1031 | BIO_free(conn->ssl_in); | |
1032 | os_free(conn); | |
1033 | return NULL; | |
1034 | } | |
1035 | ||
1036 | SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out); | |
1037 | ||
1038 | return conn; | |
1039 | } | |
1040 | ||
1041 | ||
1042 | void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn) | |
1043 | { | |
1044 | if (conn == NULL) | |
1045 | return; | |
1046 | SSL_free(conn->ssl); | |
1047 | tls_engine_deinit(conn); | |
1048 | os_free(conn->subject_match); | |
1049 | os_free(conn->altsubject_match); | |
01f809c7 | 1050 | os_free(conn->suffix_match); |
6fc6879b JM |
1051 | os_free(conn->session_ticket); |
1052 | os_free(conn); | |
1053 | } | |
1054 | ||
1055 | ||
1056 | int tls_connection_established(void *ssl_ctx, struct tls_connection *conn) | |
1057 | { | |
1058 | return conn ? SSL_is_init_finished(conn->ssl) : 0; | |
1059 | } | |
1060 | ||
1061 | ||
1062 | int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn) | |
1063 | { | |
1064 | if (conn == NULL) | |
1065 | return -1; | |
1066 | ||
1067 | /* Shutdown previous TLS connection without notifying the peer | |
1068 | * because the connection was already terminated in practice | |
1069 | * and "close notify" shutdown alert would confuse AS. */ | |
1070 | SSL_set_quiet_shutdown(conn->ssl, 1); | |
1071 | SSL_shutdown(conn->ssl); | |
1072 | return 0; | |
1073 | } | |
1074 | ||
1075 | ||
1076 | static int tls_match_altsubject_component(X509 *cert, int type, | |
1077 | const char *value, size_t len) | |
1078 | { | |
1079 | GENERAL_NAME *gen; | |
1080 | void *ext; | |
1081 | int i, found = 0; | |
1082 | ||
1083 | ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL); | |
1084 | ||
1085 | for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) { | |
1086 | gen = sk_GENERAL_NAME_value(ext, i); | |
1087 | if (gen->type != type) | |
1088 | continue; | |
1089 | if (os_strlen((char *) gen->d.ia5->data) == len && | |
1090 | os_memcmp(value, gen->d.ia5->data, len) == 0) | |
1091 | found++; | |
1092 | } | |
1093 | ||
1094 | return found; | |
1095 | } | |
1096 | ||
1097 | ||
1098 | static int tls_match_altsubject(X509 *cert, const char *match) | |
1099 | { | |
1100 | int type; | |
1101 | const char *pos, *end; | |
1102 | size_t len; | |
1103 | ||
1104 | pos = match; | |
1105 | do { | |
1106 | if (os_strncmp(pos, "EMAIL:", 6) == 0) { | |
1107 | type = GEN_EMAIL; | |
1108 | pos += 6; | |
1109 | } else if (os_strncmp(pos, "DNS:", 4) == 0) { | |
1110 | type = GEN_DNS; | |
1111 | pos += 4; | |
1112 | } else if (os_strncmp(pos, "URI:", 4) == 0) { | |
1113 | type = GEN_URI; | |
1114 | pos += 4; | |
1115 | } else { | |
1116 | wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName " | |
1117 | "match '%s'", pos); | |
1118 | return 0; | |
1119 | } | |
1120 | end = os_strchr(pos, ';'); | |
1121 | while (end) { | |
1122 | if (os_strncmp(end + 1, "EMAIL:", 6) == 0 || | |
1123 | os_strncmp(end + 1, "DNS:", 4) == 0 || | |
1124 | os_strncmp(end + 1, "URI:", 4) == 0) | |
1125 | break; | |
1126 | end = os_strchr(end + 1, ';'); | |
1127 | } | |
1128 | if (end) | |
1129 | len = end - pos; | |
1130 | else | |
1131 | len = os_strlen(pos); | |
1132 | if (tls_match_altsubject_component(cert, type, pos, len) > 0) | |
1133 | return 1; | |
1134 | pos = end + 1; | |
1135 | } while (end); | |
1136 | ||
1137 | return 0; | |
1138 | } | |
1139 | ||
1140 | ||
461e3ebe | 1141 | #ifndef CONFIG_NATIVE_WINDOWS |
01f809c7 JM |
1142 | static int domain_suffix_match(const u8 *val, size_t len, const char *match) |
1143 | { | |
1144 | size_t i, match_len; | |
1145 | ||
1146 | /* Check for embedded nuls that could mess up suffix matching */ | |
1147 | for (i = 0; i < len; i++) { | |
1148 | if (val[i] == '\0') { | |
1149 | wpa_printf(MSG_DEBUG, "TLS: Embedded null in a string - reject"); | |
1150 | return 0; | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | match_len = os_strlen(match); | |
1155 | if (match_len > len) | |
1156 | return 0; | |
1157 | ||
1158 | if (os_strncasecmp((const char *) val + len - match_len, match, | |
1159 | match_len) != 0) | |
1160 | return 0; /* no match */ | |
1161 | ||
1162 | if (match_len == len) | |
1163 | return 1; /* exact match */ | |
1164 | ||
1165 | if (val[len - match_len - 1] == '.') | |
1166 | return 1; /* full label match completes suffix match */ | |
1167 | ||
1168 | wpa_printf(MSG_DEBUG, "TLS: Reject due to incomplete label match"); | |
1169 | return 0; | |
1170 | } | |
461e3ebe | 1171 | #endif /* CONFIG_NATIVE_WINDOWS */ |
01f809c7 JM |
1172 | |
1173 | ||
1174 | static int tls_match_suffix(X509 *cert, const char *match) | |
1175 | { | |
461e3ebe JM |
1176 | #ifdef CONFIG_NATIVE_WINDOWS |
1177 | /* wincrypt.h has conflicting X509_NAME definition */ | |
1178 | return -1; | |
1179 | #else /* CONFIG_NATIVE_WINDOWS */ | |
01f809c7 JM |
1180 | GENERAL_NAME *gen; |
1181 | void *ext; | |
1182 | int i; | |
1183 | int dns_name = 0; | |
1184 | X509_NAME *name; | |
1185 | ||
1186 | wpa_printf(MSG_DEBUG, "TLS: Match domain against suffix %s", match); | |
1187 | ||
1188 | ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL); | |
1189 | ||
1190 | for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) { | |
1191 | gen = sk_GENERAL_NAME_value(ext, i); | |
1192 | if (gen->type != GEN_DNS) | |
1193 | continue; | |
1194 | dns_name++; | |
1195 | wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate dNSName", | |
1196 | gen->d.dNSName->data, | |
1197 | gen->d.dNSName->length); | |
1198 | if (domain_suffix_match(gen->d.dNSName->data, | |
1199 | gen->d.dNSName->length, match) == 1) { | |
1200 | wpa_printf(MSG_DEBUG, "TLS: Suffix match in dNSName found"); | |
1201 | return 1; | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | if (dns_name) { | |
1206 | wpa_printf(MSG_DEBUG, "TLS: None of the dNSName(s) matched"); | |
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | name = X509_get_subject_name(cert); | |
1211 | i = -1; | |
1212 | for (;;) { | |
1213 | X509_NAME_ENTRY *e; | |
1214 | ASN1_STRING *cn; | |
1215 | ||
1216 | i = X509_NAME_get_index_by_NID(name, NID_commonName, i); | |
1217 | if (i == -1) | |
1218 | break; | |
1219 | e = X509_NAME_get_entry(name, i); | |
1220 | if (e == NULL) | |
1221 | continue; | |
1222 | cn = X509_NAME_ENTRY_get_data(e); | |
1223 | if (cn == NULL) | |
1224 | continue; | |
1225 | wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate commonName", | |
1226 | cn->data, cn->length); | |
1227 | if (domain_suffix_match(cn->data, cn->length, match) == 1) { | |
1228 | wpa_printf(MSG_DEBUG, "TLS: Suffix match in commonName found"); | |
1229 | return 1; | |
1230 | } | |
1231 | } | |
1232 | ||
1233 | wpa_printf(MSG_DEBUG, "TLS: No CommonName suffix match found"); | |
1234 | return 0; | |
461e3ebe | 1235 | #endif /* CONFIG_NATIVE_WINDOWS */ |
01f809c7 JM |
1236 | } |
1237 | ||
1238 | ||
00468b46 JM |
1239 | static enum tls_fail_reason openssl_tls_fail_reason(int err) |
1240 | { | |
1241 | switch (err) { | |
1242 | case X509_V_ERR_CERT_REVOKED: | |
1243 | return TLS_FAIL_REVOKED; | |
1244 | case X509_V_ERR_CERT_NOT_YET_VALID: | |
1245 | case X509_V_ERR_CRL_NOT_YET_VALID: | |
1246 | return TLS_FAIL_NOT_YET_VALID; | |
1247 | case X509_V_ERR_CERT_HAS_EXPIRED: | |
1248 | case X509_V_ERR_CRL_HAS_EXPIRED: | |
1249 | return TLS_FAIL_EXPIRED; | |
1250 | case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: | |
1251 | case X509_V_ERR_UNABLE_TO_GET_CRL: | |
1252 | case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: | |
1253 | case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: | |
1254 | case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: | |
1255 | case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: | |
1256 | case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: | |
1257 | case X509_V_ERR_CERT_CHAIN_TOO_LONG: | |
1258 | case X509_V_ERR_PATH_LENGTH_EXCEEDED: | |
1259 | case X509_V_ERR_INVALID_CA: | |
1260 | return TLS_FAIL_UNTRUSTED; | |
1261 | case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: | |
1262 | case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: | |
1263 | case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: | |
1264 | case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: | |
1265 | case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: | |
1266 | case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: | |
1267 | case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: | |
1268 | case X509_V_ERR_CERT_UNTRUSTED: | |
1269 | case X509_V_ERR_CERT_REJECTED: | |
1270 | return TLS_FAIL_BAD_CERTIFICATE; | |
1271 | default: | |
1272 | return TLS_FAIL_UNSPECIFIED; | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | ||
1277 | static struct wpabuf * get_x509_cert(X509 *cert) | |
1278 | { | |
1279 | struct wpabuf *buf; | |
1280 | u8 *tmp; | |
1281 | ||
1282 | int cert_len = i2d_X509(cert, NULL); | |
1283 | if (cert_len <= 0) | |
1284 | return NULL; | |
1285 | ||
1286 | buf = wpabuf_alloc(cert_len); | |
1287 | if (buf == NULL) | |
1288 | return NULL; | |
1289 | ||
1290 | tmp = wpabuf_put(buf, cert_len); | |
1291 | i2d_X509(cert, &tmp); | |
1292 | return buf; | |
1293 | } | |
1294 | ||
1295 | ||
1296 | static void openssl_tls_fail_event(struct tls_connection *conn, | |
1297 | X509 *err_cert, int err, int depth, | |
1298 | const char *subject, const char *err_str, | |
1299 | enum tls_fail_reason reason) | |
1300 | { | |
1301 | union tls_event_data ev; | |
1302 | struct wpabuf *cert = NULL; | |
7c0e1e27 | 1303 | struct tls_context *context = conn->context; |
00468b46 | 1304 | |
7c0e1e27 | 1305 | if (context->event_cb == NULL) |
00468b46 JM |
1306 | return; |
1307 | ||
1308 | cert = get_x509_cert(err_cert); | |
1309 | os_memset(&ev, 0, sizeof(ev)); | |
1310 | ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ? | |
1311 | reason : openssl_tls_fail_reason(err); | |
1312 | ev.cert_fail.depth = depth; | |
1313 | ev.cert_fail.subject = subject; | |
1314 | ev.cert_fail.reason_txt = err_str; | |
1315 | ev.cert_fail.cert = cert; | |
7c0e1e27 | 1316 | context->event_cb(context->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev); |
00468b46 JM |
1317 | wpabuf_free(cert); |
1318 | } | |
1319 | ||
1320 | ||
1321 | static void openssl_tls_cert_event(struct tls_connection *conn, | |
1322 | X509 *err_cert, int depth, | |
1323 | const char *subject) | |
1324 | { | |
1325 | struct wpabuf *cert = NULL; | |
1326 | union tls_event_data ev; | |
7c0e1e27 | 1327 | struct tls_context *context = conn->context; |
00468b46 JM |
1328 | #ifdef CONFIG_SHA256 |
1329 | u8 hash[32]; | |
1330 | #endif /* CONFIG_SHA256 */ | |
1331 | ||
7c0e1e27 | 1332 | if (context->event_cb == NULL) |
00468b46 JM |
1333 | return; |
1334 | ||
1335 | os_memset(&ev, 0, sizeof(ev)); | |
7c0e1e27 | 1336 | if (conn->cert_probe || context->cert_in_cb) { |
00468b46 JM |
1337 | cert = get_x509_cert(err_cert); |
1338 | ev.peer_cert.cert = cert; | |
1339 | } | |
1340 | #ifdef CONFIG_SHA256 | |
1341 | if (cert) { | |
1342 | const u8 *addr[1]; | |
1343 | size_t len[1]; | |
1344 | addr[0] = wpabuf_head(cert); | |
1345 | len[0] = wpabuf_len(cert); | |
1346 | if (sha256_vector(1, addr, len, hash) == 0) { | |
1347 | ev.peer_cert.hash = hash; | |
1348 | ev.peer_cert.hash_len = sizeof(hash); | |
1349 | } | |
1350 | } | |
1351 | #endif /* CONFIG_SHA256 */ | |
1352 | ev.peer_cert.depth = depth; | |
1353 | ev.peer_cert.subject = subject; | |
7c0e1e27 | 1354 | context->event_cb(context->cb_ctx, TLS_PEER_CERTIFICATE, &ev); |
00468b46 JM |
1355 | wpabuf_free(cert); |
1356 | } | |
1357 | ||
1358 | ||
6fc6879b JM |
1359 | static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx) |
1360 | { | |
1361 | char buf[256]; | |
1362 | X509 *err_cert; | |
1363 | int err, depth; | |
1364 | SSL *ssl; | |
1365 | struct tls_connection *conn; | |
7c0e1e27 | 1366 | struct tls_context *context; |
01f809c7 | 1367 | char *match, *altmatch, *suffix_match; |
00468b46 | 1368 | const char *err_str; |
6fc6879b JM |
1369 | |
1370 | err_cert = X509_STORE_CTX_get_current_cert(x509_ctx); | |
1371 | err = X509_STORE_CTX_get_error(x509_ctx); | |
1372 | depth = X509_STORE_CTX_get_error_depth(x509_ctx); | |
1373 | ssl = X509_STORE_CTX_get_ex_data(x509_ctx, | |
1374 | SSL_get_ex_data_X509_STORE_CTX_idx()); | |
1375 | X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf)); | |
1376 | ||
1377 | conn = SSL_get_app_data(ssl); | |
0bdaa741 JM |
1378 | if (conn == NULL) |
1379 | return 0; | |
080585c0 JM |
1380 | |
1381 | if (depth == 0) | |
1382 | conn->peer_cert = err_cert; | |
1383 | else if (depth == 1) | |
1384 | conn->peer_issuer = err_cert; | |
6bf61fb2 JM |
1385 | else if (depth == 2) |
1386 | conn->peer_issuer_issuer = err_cert; | |
080585c0 | 1387 | |
7c0e1e27 | 1388 | context = conn->context; |
0bdaa741 JM |
1389 | match = conn->subject_match; |
1390 | altmatch = conn->altsubject_match; | |
01f809c7 | 1391 | suffix_match = conn->suffix_match; |
6fc6879b | 1392 | |
00468b46 JM |
1393 | if (!preverify_ok && !conn->ca_cert_verify) |
1394 | preverify_ok = 1; | |
1395 | if (!preverify_ok && depth > 0 && conn->server_cert_only) | |
1396 | preverify_ok = 1; | |
235279e7 JM |
1397 | if (!preverify_ok && (conn->flags & TLS_CONN_DISABLE_TIME_CHECKS) && |
1398 | (err == X509_V_ERR_CERT_HAS_EXPIRED || | |
1399 | err == X509_V_ERR_CERT_NOT_YET_VALID)) { | |
1400 | wpa_printf(MSG_DEBUG, "OpenSSL: Ignore certificate validity " | |
1401 | "time mismatch"); | |
1402 | preverify_ok = 1; | |
1403 | } | |
00468b46 JM |
1404 | |
1405 | err_str = X509_verify_cert_error_string(err); | |
1406 | ||
1407 | #ifdef CONFIG_SHA256 | |
1408 | if (preverify_ok && depth == 0 && conn->server_cert_only) { | |
1409 | struct wpabuf *cert; | |
1410 | cert = get_x509_cert(err_cert); | |
1411 | if (!cert) { | |
1412 | wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch " | |
1413 | "server certificate data"); | |
6fc6879b | 1414 | preverify_ok = 0; |
00468b46 JM |
1415 | } else { |
1416 | u8 hash[32]; | |
1417 | const u8 *addr[1]; | |
1418 | size_t len[1]; | |
1419 | addr[0] = wpabuf_head(cert); | |
1420 | len[0] = wpabuf_len(cert); | |
1421 | if (sha256_vector(1, addr, len, hash) < 0 || | |
1422 | os_memcmp(conn->srv_cert_hash, hash, 32) != 0) { | |
1423 | err_str = "Server certificate mismatch"; | |
1424 | err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN; | |
1425 | preverify_ok = 0; | |
1426 | } | |
1427 | wpabuf_free(cert); | |
6fc6879b JM |
1428 | } |
1429 | } | |
00468b46 JM |
1430 | #endif /* CONFIG_SHA256 */ |
1431 | ||
1432 | if (!preverify_ok) { | |
1433 | wpa_printf(MSG_WARNING, "TLS: Certificate verification failed," | |
1434 | " error %d (%s) depth %d for '%s'", err, err_str, | |
1435 | depth, buf); | |
1436 | openssl_tls_fail_event(conn, err_cert, err, depth, buf, | |
1437 | err_str, TLS_FAIL_UNSPECIFIED); | |
1438 | return preverify_ok; | |
1439 | } | |
1440 | ||
1441 | wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d " | |
1442 | "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'", | |
1443 | preverify_ok, err, err_str, | |
1444 | conn->ca_cert_verify, depth, buf); | |
1445 | if (depth == 0 && match && os_strstr(buf, match) == NULL) { | |
1446 | wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not " | |
1447 | "match with '%s'", buf, match); | |
1448 | preverify_ok = 0; | |
1449 | openssl_tls_fail_event(conn, err_cert, err, depth, buf, | |
1450 | "Subject mismatch", | |
1451 | TLS_FAIL_SUBJECT_MISMATCH); | |
1452 | } else if (depth == 0 && altmatch && | |
1453 | !tls_match_altsubject(err_cert, altmatch)) { | |
1454 | wpa_printf(MSG_WARNING, "TLS: altSubjectName match " | |
1455 | "'%s' not found", altmatch); | |
1456 | preverify_ok = 0; | |
1457 | openssl_tls_fail_event(conn, err_cert, err, depth, buf, | |
1458 | "AltSubject mismatch", | |
1459 | TLS_FAIL_ALTSUBJECT_MISMATCH); | |
01f809c7 JM |
1460 | } else if (depth == 0 && suffix_match && |
1461 | !tls_match_suffix(err_cert, suffix_match)) { | |
1462 | wpa_printf(MSG_WARNING, "TLS: Domain suffix match '%s' not found", | |
1463 | suffix_match); | |
1464 | preverify_ok = 0; | |
1465 | openssl_tls_fail_event(conn, err_cert, err, depth, buf, | |
1466 | "Domain suffix mismatch", | |
1467 | TLS_FAIL_DOMAIN_SUFFIX_MISMATCH); | |
00468b46 JM |
1468 | } else |
1469 | openssl_tls_cert_event(conn, err_cert, depth, buf); | |
1470 | ||
1471 | if (conn->cert_probe && preverify_ok && depth == 0) { | |
1472 | wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate " | |
1473 | "on probe-only run"); | |
1474 | preverify_ok = 0; | |
1475 | openssl_tls_fail_event(conn, err_cert, err, depth, buf, | |
1476 | "Server certificate chain probe", | |
1477 | TLS_FAIL_SERVER_CHAIN_PROBE); | |
1478 | } | |
6fc6879b | 1479 | |
51e3eafb JM |
1480 | if (!conn->server && err_cert && preverify_ok && depth == 0 && |
1481 | (err_cert->ex_flags & EXFLAG_XKUSAGE) && | |
1482 | (err_cert->ex_xkusage & XKU_SSL_CLIENT)) { | |
1483 | wpa_printf(MSG_WARNING, "TLS: Server used client certificate"); | |
1484 | openssl_tls_fail_event(conn, err_cert, err, depth, buf, | |
1485 | "Server used client certificate", | |
1486 | TLS_FAIL_SERVER_USED_CLIENT_CERT); | |
1487 | preverify_ok = 0; | |
1488 | } | |
1489 | ||
7c0e1e27 PS |
1490 | if (preverify_ok && context->event_cb != NULL) |
1491 | context->event_cb(context->cb_ctx, | |
1492 | TLS_CERT_CHAIN_SUCCESS, NULL); | |
dd7fec1f | 1493 | |
6fc6879b JM |
1494 | return preverify_ok; |
1495 | } | |
1496 | ||
1497 | ||
1498 | #ifndef OPENSSL_NO_STDIO | |
1499 | static int tls_load_ca_der(void *_ssl_ctx, const char *ca_cert) | |
1500 | { | |
1501 | SSL_CTX *ssl_ctx = _ssl_ctx; | |
1502 | X509_LOOKUP *lookup; | |
1503 | int ret = 0; | |
1504 | ||
1505 | lookup = X509_STORE_add_lookup(ssl_ctx->cert_store, | |
1506 | X509_LOOKUP_file()); | |
1507 | if (lookup == NULL) { | |
1508 | tls_show_errors(MSG_WARNING, __func__, | |
1509 | "Failed add lookup for X509 store"); | |
1510 | return -1; | |
1511 | } | |
1512 | ||
1513 | if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) { | |
1514 | unsigned long err = ERR_peek_error(); | |
1515 | tls_show_errors(MSG_WARNING, __func__, | |
1516 | "Failed load CA in DER format"); | |
1517 | if (ERR_GET_LIB(err) == ERR_LIB_X509 && | |
1518 | ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) { | |
1519 | wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring " | |
1520 | "cert already in hash table error", | |
1521 | __func__); | |
1522 | } else | |
1523 | ret = -1; | |
1524 | } | |
1525 | ||
1526 | return ret; | |
1527 | } | |
1528 | #endif /* OPENSSL_NO_STDIO */ | |
1529 | ||
1530 | ||
1531 | static int tls_connection_ca_cert(void *_ssl_ctx, struct tls_connection *conn, | |
1532 | const char *ca_cert, const u8 *ca_cert_blob, | |
1533 | size_t ca_cert_blob_len, const char *ca_path) | |
1534 | { | |
1535 | SSL_CTX *ssl_ctx = _ssl_ctx; | |
1536 | ||
1537 | /* | |
1538 | * Remove previously configured trusted CA certificates before adding | |
1539 | * new ones. | |
1540 | */ | |
1541 | X509_STORE_free(ssl_ctx->cert_store); | |
1542 | ssl_ctx->cert_store = X509_STORE_new(); | |
1543 | if (ssl_ctx->cert_store == NULL) { | |
1544 | wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new " | |
1545 | "certificate store", __func__); | |
1546 | return -1; | |
1547 | } | |
1548 | ||
00468b46 JM |
1549 | SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); |
1550 | conn->ca_cert_verify = 1; | |
1551 | ||
1552 | if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) { | |
1553 | wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate " | |
1554 | "chain"); | |
1555 | conn->cert_probe = 1; | |
1556 | conn->ca_cert_verify = 0; | |
1557 | return 0; | |
1558 | } | |
1559 | ||
1560 | if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) { | |
1561 | #ifdef CONFIG_SHA256 | |
1562 | const char *pos = ca_cert + 7; | |
1563 | if (os_strncmp(pos, "server/sha256/", 14) != 0) { | |
1564 | wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert " | |
1565 | "hash value '%s'", ca_cert); | |
1566 | return -1; | |
1567 | } | |
1568 | pos += 14; | |
1569 | if (os_strlen(pos) != 32 * 2) { | |
1570 | wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 " | |
1571 | "hash length in ca_cert '%s'", ca_cert); | |
1572 | return -1; | |
1573 | } | |
1574 | if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) { | |
1575 | wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash " | |
1576 | "value in ca_cert '%s'", ca_cert); | |
1577 | return -1; | |
1578 | } | |
1579 | conn->server_cert_only = 1; | |
1580 | wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server " | |
1581 | "certificate match"); | |
1582 | return 0; | |
1583 | #else /* CONFIG_SHA256 */ | |
1584 | wpa_printf(MSG_INFO, "No SHA256 included in the build - " | |
1585 | "cannot validate server certificate hash"); | |
1586 | return -1; | |
1587 | #endif /* CONFIG_SHA256 */ | |
1588 | } | |
1589 | ||
6fc6879b JM |
1590 | if (ca_cert_blob) { |
1591 | X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob, | |
1592 | ca_cert_blob_len); | |
1593 | if (cert == NULL) { | |
1594 | tls_show_errors(MSG_WARNING, __func__, | |
1595 | "Failed to parse ca_cert_blob"); | |
1596 | return -1; | |
1597 | } | |
1598 | ||
1599 | if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { | |
1600 | unsigned long err = ERR_peek_error(); | |
1601 | tls_show_errors(MSG_WARNING, __func__, | |
1602 | "Failed to add ca_cert_blob to " | |
1603 | "certificate store"); | |
1604 | if (ERR_GET_LIB(err) == ERR_LIB_X509 && | |
1605 | ERR_GET_REASON(err) == | |
1606 | X509_R_CERT_ALREADY_IN_HASH_TABLE) { | |
1607 | wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring " | |
1608 | "cert already in hash table error", | |
1609 | __func__); | |
1610 | } else { | |
1611 | X509_free(cert); | |
1612 | return -1; | |
1613 | } | |
1614 | } | |
1615 | X509_free(cert); | |
1616 | wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob " | |
1617 | "to certificate store", __func__); | |
6fc6879b JM |
1618 | return 0; |
1619 | } | |
1620 | ||
2a0cd067 DS |
1621 | #ifdef ANDROID |
1622 | if (ca_cert && os_strncmp("keystore://", ca_cert, 11) == 0) { | |
1623 | BIO *bio = BIO_from_keystore(&ca_cert[11]); | |
1624 | STACK_OF(X509_INFO) *stack = NULL; | |
1625 | int i; | |
1626 | ||
1627 | if (bio) { | |
1628 | stack = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL); | |
1629 | BIO_free(bio); | |
1630 | } | |
1631 | if (!stack) | |
1632 | return -1; | |
1633 | ||
1634 | for (i = 0; i < sk_X509_INFO_num(stack); ++i) { | |
1635 | X509_INFO *info = sk_X509_INFO_value(stack, i); | |
1636 | if (info->x509) { | |
1637 | X509_STORE_add_cert(ssl_ctx->cert_store, | |
1638 | info->x509); | |
1639 | } | |
1640 | if (info->crl) { | |
1641 | X509_STORE_add_crl(ssl_ctx->cert_store, | |
1642 | info->crl); | |
1643 | } | |
1644 | } | |
1645 | sk_X509_INFO_pop_free(stack, X509_INFO_free); | |
1646 | SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); | |
1647 | return 0; | |
1648 | } | |
1649 | #endif /* ANDROID */ | |
1650 | ||
6fc6879b JM |
1651 | #ifdef CONFIG_NATIVE_WINDOWS |
1652 | if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) == | |
1653 | 0) { | |
1654 | wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from " | |
1655 | "system certificate store"); | |
6fc6879b JM |
1656 | return 0; |
1657 | } | |
1658 | #endif /* CONFIG_NATIVE_WINDOWS */ | |
1659 | ||
1660 | if (ca_cert || ca_path) { | |
1661 | #ifndef OPENSSL_NO_STDIO | |
1662 | if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) != | |
1663 | 1) { | |
1664 | tls_show_errors(MSG_WARNING, __func__, | |
1665 | "Failed to load root certificates"); | |
1666 | if (ca_cert && | |
1667 | tls_load_ca_der(ssl_ctx, ca_cert) == 0) { | |
1668 | wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded " | |
1669 | "DER format CA certificate", | |
1670 | __func__); | |
1671 | } else | |
1672 | return -1; | |
1673 | } else { | |
1674 | wpa_printf(MSG_DEBUG, "TLS: Trusted root " | |
1675 | "certificate(s) loaded"); | |
1676 | tls_get_errors(ssl_ctx); | |
1677 | } | |
6fc6879b JM |
1678 | #else /* OPENSSL_NO_STDIO */ |
1679 | wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", | |
1680 | __func__); | |
1681 | return -1; | |
1682 | #endif /* OPENSSL_NO_STDIO */ | |
1683 | } else { | |
1684 | /* No ca_cert configured - do not try to verify server | |
1685 | * certificate */ | |
00468b46 | 1686 | conn->ca_cert_verify = 0; |
6fc6879b JM |
1687 | } |
1688 | ||
1689 | return 0; | |
1690 | } | |
1691 | ||
1692 | ||
1693 | static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert) | |
1694 | { | |
1695 | if (ca_cert) { | |
1696 | if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1) | |
1697 | { | |
1698 | tls_show_errors(MSG_WARNING, __func__, | |
1699 | "Failed to load root certificates"); | |
1700 | return -1; | |
1701 | } | |
1702 | ||
1703 | wpa_printf(MSG_DEBUG, "TLS: Trusted root " | |
1704 | "certificate(s) loaded"); | |
1705 | ||
1706 | #ifndef OPENSSL_NO_STDIO | |
1707 | /* Add the same CAs to the client certificate requests */ | |
1708 | SSL_CTX_set_client_CA_list(ssl_ctx, | |
1709 | SSL_load_client_CA_file(ca_cert)); | |
1710 | #endif /* OPENSSL_NO_STDIO */ | |
1711 | } | |
1712 | ||
1713 | return 0; | |
1714 | } | |
1715 | ||
1716 | ||
1717 | int tls_global_set_verify(void *ssl_ctx, int check_crl) | |
1718 | { | |
1719 | int flags; | |
1720 | ||
1721 | if (check_crl) { | |
1722 | X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx); | |
1723 | if (cs == NULL) { | |
1724 | tls_show_errors(MSG_INFO, __func__, "Failed to get " | |
1725 | "certificate store when enabling " | |
1726 | "check_crl"); | |
1727 | return -1; | |
1728 | } | |
1729 | flags = X509_V_FLAG_CRL_CHECK; | |
1730 | if (check_crl == 2) | |
1731 | flags |= X509_V_FLAG_CRL_CHECK_ALL; | |
1732 | X509_STORE_set_flags(cs, flags); | |
1733 | } | |
1734 | return 0; | |
1735 | } | |
1736 | ||
1737 | ||
1738 | static int tls_connection_set_subject_match(struct tls_connection *conn, | |
1739 | const char *subject_match, | |
01f809c7 JM |
1740 | const char *altsubject_match, |
1741 | const char *suffix_match) | |
6fc6879b JM |
1742 | { |
1743 | os_free(conn->subject_match); | |
1744 | conn->subject_match = NULL; | |
1745 | if (subject_match) { | |
1746 | conn->subject_match = os_strdup(subject_match); | |
1747 | if (conn->subject_match == NULL) | |
1748 | return -1; | |
1749 | } | |
1750 | ||
1751 | os_free(conn->altsubject_match); | |
1752 | conn->altsubject_match = NULL; | |
1753 | if (altsubject_match) { | |
1754 | conn->altsubject_match = os_strdup(altsubject_match); | |
1755 | if (conn->altsubject_match == NULL) | |
1756 | return -1; | |
1757 | } | |
1758 | ||
01f809c7 JM |
1759 | os_free(conn->suffix_match); |
1760 | conn->suffix_match = NULL; | |
1761 | if (suffix_match) { | |
1762 | conn->suffix_match = os_strdup(suffix_match); | |
1763 | if (conn->suffix_match == NULL) | |
1764 | return -1; | |
1765 | } | |
1766 | ||
6fc6879b JM |
1767 | return 0; |
1768 | } | |
1769 | ||
1770 | ||
1771 | int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn, | |
1772 | int verify_peer) | |
1773 | { | |
bf206cad JM |
1774 | static int counter = 0; |
1775 | ||
6fc6879b JM |
1776 | if (conn == NULL) |
1777 | return -1; | |
1778 | ||
1779 | if (verify_peer) { | |
00468b46 | 1780 | conn->ca_cert_verify = 1; |
6fc6879b JM |
1781 | SSL_set_verify(conn->ssl, SSL_VERIFY_PEER | |
1782 | SSL_VERIFY_FAIL_IF_NO_PEER_CERT | | |
1783 | SSL_VERIFY_CLIENT_ONCE, tls_verify_cb); | |
1784 | } else { | |
00468b46 | 1785 | conn->ca_cert_verify = 0; |
6fc6879b JM |
1786 | SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL); |
1787 | } | |
1788 | ||
1789 | SSL_set_accept_state(conn->ssl); | |
1790 | ||
bf206cad JM |
1791 | /* |
1792 | * Set session id context in order to avoid fatal errors when client | |
1793 | * tries to resume a session. However, set the context to a unique | |
1794 | * value in order to effectively disable session resumption for now | |
1795 | * since not all areas of the server code are ready for it (e.g., | |
1796 | * EAP-TTLS needs special handling for Phase 2 after abbreviated TLS | |
1797 | * handshake). | |
1798 | */ | |
1799 | counter++; | |
1800 | SSL_set_session_id_context(conn->ssl, | |
1801 | (const unsigned char *) &counter, | |
1802 | sizeof(counter)); | |
1803 | ||
6fc6879b JM |
1804 | return 0; |
1805 | } | |
1806 | ||
1807 | ||
1808 | static int tls_connection_client_cert(struct tls_connection *conn, | |
1809 | const char *client_cert, | |
1810 | const u8 *client_cert_blob, | |
1811 | size_t client_cert_blob_len) | |
1812 | { | |
1813 | if (client_cert == NULL && client_cert_blob == NULL) | |
1814 | return 0; | |
1815 | ||
1816 | if (client_cert_blob && | |
1817 | SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob, | |
1818 | client_cert_blob_len) == 1) { | |
1819 | wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> " | |
1820 | "OK"); | |
1821 | return 0; | |
1822 | } else if (client_cert_blob) { | |
1823 | tls_show_errors(MSG_DEBUG, __func__, | |
1824 | "SSL_use_certificate_ASN1 failed"); | |
1825 | } | |
1826 | ||
1827 | if (client_cert == NULL) | |
1828 | return -1; | |
1829 | ||
2a0cd067 DS |
1830 | #ifdef ANDROID |
1831 | if (os_strncmp("keystore://", client_cert, 11) == 0) { | |
1832 | BIO *bio = BIO_from_keystore(&client_cert[11]); | |
1833 | X509 *x509 = NULL; | |
1834 | int ret = -1; | |
1835 | if (bio) { | |
1836 | x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL); | |
1837 | BIO_free(bio); | |
1838 | } | |
1839 | if (x509) { | |
1840 | if (SSL_use_certificate(conn->ssl, x509) == 1) | |
1841 | ret = 0; | |
1842 | X509_free(x509); | |
1843 | } | |
1844 | return ret; | |
1845 | } | |
1846 | #endif /* ANDROID */ | |
1847 | ||
6fc6879b JM |
1848 | #ifndef OPENSSL_NO_STDIO |
1849 | if (SSL_use_certificate_file(conn->ssl, client_cert, | |
1850 | SSL_FILETYPE_ASN1) == 1) { | |
1851 | wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)" | |
1852 | " --> OK"); | |
1853 | return 0; | |
6fc6879b JM |
1854 | } |
1855 | ||
1856 | if (SSL_use_certificate_file(conn->ssl, client_cert, | |
1857 | SSL_FILETYPE_PEM) == 1) { | |
effab86f | 1858 | ERR_clear_error(); |
6fc6879b JM |
1859 | wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)" |
1860 | " --> OK"); | |
1861 | return 0; | |
6fc6879b | 1862 | } |
effab86f JM |
1863 | |
1864 | tls_show_errors(MSG_DEBUG, __func__, | |
1865 | "SSL_use_certificate_file failed"); | |
6fc6879b JM |
1866 | #else /* OPENSSL_NO_STDIO */ |
1867 | wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__); | |
1868 | #endif /* OPENSSL_NO_STDIO */ | |
1869 | ||
1870 | return -1; | |
1871 | } | |
1872 | ||
1873 | ||
1874 | static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert) | |
1875 | { | |
1876 | #ifndef OPENSSL_NO_STDIO | |
1877 | if (client_cert == NULL) | |
1878 | return 0; | |
1879 | ||
1880 | if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert, | |
1881 | SSL_FILETYPE_ASN1) != 1 && | |
65897747 | 1882 | SSL_CTX_use_certificate_chain_file(ssl_ctx, client_cert) != 1 && |
6fc6879b JM |
1883 | SSL_CTX_use_certificate_file(ssl_ctx, client_cert, |
1884 | SSL_FILETYPE_PEM) != 1) { | |
1885 | tls_show_errors(MSG_INFO, __func__, | |
1886 | "Failed to load client certificate"); | |
1887 | return -1; | |
1888 | } | |
1889 | return 0; | |
1890 | #else /* OPENSSL_NO_STDIO */ | |
1891 | if (client_cert == NULL) | |
1892 | return 0; | |
1893 | wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__); | |
1894 | return -1; | |
1895 | #endif /* OPENSSL_NO_STDIO */ | |
1896 | } | |
1897 | ||
1898 | ||
1899 | static int tls_passwd_cb(char *buf, int size, int rwflag, void *password) | |
1900 | { | |
1901 | if (password == NULL) { | |
1902 | return 0; | |
1903 | } | |
1904 | os_strlcpy(buf, (char *) password, size); | |
1905 | return os_strlen(buf); | |
1906 | } | |
1907 | ||
1908 | ||
1909 | #ifdef PKCS12_FUNCS | |
1910 | static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12, | |
1911 | const char *passwd) | |
1912 | { | |
1913 | EVP_PKEY *pkey; | |
1914 | X509 *cert; | |
1915 | STACK_OF(X509) *certs; | |
1916 | int res = 0; | |
1917 | char buf[256]; | |
1918 | ||
1919 | pkey = NULL; | |
1920 | cert = NULL; | |
1921 | certs = NULL; | |
1922 | if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) { | |
1923 | tls_show_errors(MSG_DEBUG, __func__, | |
1924 | "Failed to parse PKCS12 file"); | |
1925 | PKCS12_free(p12); | |
1926 | return -1; | |
1927 | } | |
1928 | wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data"); | |
1929 | ||
1930 | if (cert) { | |
1931 | X509_NAME_oneline(X509_get_subject_name(cert), buf, | |
1932 | sizeof(buf)); | |
1933 | wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: " | |
1934 | "subject='%s'", buf); | |
1935 | if (ssl) { | |
1936 | if (SSL_use_certificate(ssl, cert) != 1) | |
1937 | res = -1; | |
1938 | } else { | |
1939 | if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1) | |
1940 | res = -1; | |
1941 | } | |
1942 | X509_free(cert); | |
1943 | } | |
1944 | ||
1945 | if (pkey) { | |
1946 | wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12"); | |
1947 | if (ssl) { | |
1948 | if (SSL_use_PrivateKey(ssl, pkey) != 1) | |
1949 | res = -1; | |
1950 | } else { | |
1951 | if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1) | |
1952 | res = -1; | |
1953 | } | |
1954 | EVP_PKEY_free(pkey); | |
1955 | } | |
1956 | ||
1957 | if (certs) { | |
1958 | while ((cert = sk_X509_pop(certs)) != NULL) { | |
1959 | X509_NAME_oneline(X509_get_subject_name(cert), buf, | |
1960 | sizeof(buf)); | |
1961 | wpa_printf(MSG_DEBUG, "TLS: additional certificate" | |
1962 | " from PKCS12: subject='%s'", buf); | |
1963 | /* | |
1964 | * There is no SSL equivalent for the chain cert - so | |
1965 | * always add it to the context... | |
1966 | */ | |
1967 | if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) { | |
1968 | res = -1; | |
1969 | break; | |
1970 | } | |
1971 | } | |
1972 | sk_X509_free(certs); | |
1973 | } | |
1974 | ||
1975 | PKCS12_free(p12); | |
1976 | ||
1977 | if (res < 0) | |
1978 | tls_get_errors(ssl_ctx); | |
1979 | ||
1980 | return res; | |
1981 | } | |
1982 | #endif /* PKCS12_FUNCS */ | |
1983 | ||
1984 | ||
1985 | static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key, | |
1986 | const char *passwd) | |
1987 | { | |
1988 | #ifdef PKCS12_FUNCS | |
1989 | FILE *f; | |
1990 | PKCS12 *p12; | |
1991 | ||
1992 | f = fopen(private_key, "rb"); | |
1993 | if (f == NULL) | |
1994 | return -1; | |
1995 | ||
1996 | p12 = d2i_PKCS12_fp(f, NULL); | |
1997 | fclose(f); | |
1998 | ||
1999 | if (p12 == NULL) { | |
2000 | tls_show_errors(MSG_INFO, __func__, | |
2001 | "Failed to use PKCS#12 file"); | |
2002 | return -1; | |
2003 | } | |
2004 | ||
2005 | return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd); | |
2006 | ||
2007 | #else /* PKCS12_FUNCS */ | |
2008 | wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read " | |
2009 | "p12/pfx files"); | |
2010 | return -1; | |
2011 | #endif /* PKCS12_FUNCS */ | |
2012 | } | |
2013 | ||
2014 | ||
2015 | static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl, | |
2016 | const u8 *blob, size_t len, const char *passwd) | |
2017 | { | |
2018 | #ifdef PKCS12_FUNCS | |
2019 | PKCS12 *p12; | |
2020 | ||
2021 | p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len); | |
2022 | if (p12 == NULL) { | |
2023 | tls_show_errors(MSG_INFO, __func__, | |
2024 | "Failed to use PKCS#12 blob"); | |
2025 | return -1; | |
2026 | } | |
2027 | ||
2028 | return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd); | |
2029 | ||
2030 | #else /* PKCS12_FUNCS */ | |
2031 | wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse " | |
2032 | "p12/pfx blobs"); | |
2033 | return -1; | |
2034 | #endif /* PKCS12_FUNCS */ | |
2035 | } | |
2036 | ||
2037 | ||
e572cb63 | 2038 | #ifndef OPENSSL_NO_ENGINE |
e59c91af DS |
2039 | static int tls_engine_get_cert(struct tls_connection *conn, |
2040 | const char *cert_id, | |
2041 | X509 **cert) | |
2042 | { | |
e59c91af DS |
2043 | /* this runs after the private key is loaded so no PIN is required */ |
2044 | struct { | |
2045 | const char *cert_id; | |
2046 | X509 *cert; | |
2047 | } params; | |
2048 | params.cert_id = cert_id; | |
2049 | params.cert = NULL; | |
2050 | ||
2051 | if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL", | |
2052 | 0, ¶ms, NULL, 1)) { | |
2053 | wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id" | |
2054 | " '%s' [%s]", cert_id, | |
2055 | ERR_error_string(ERR_get_error(), NULL)); | |
2056 | return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; | |
2057 | } | |
2058 | if (!params.cert) { | |
2059 | wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id" | |
2060 | " '%s'", cert_id); | |
2061 | return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; | |
2062 | } | |
2063 | *cert = params.cert; | |
2064 | return 0; | |
e59c91af | 2065 | } |
e572cb63 | 2066 | #endif /* OPENSSL_NO_ENGINE */ |
e59c91af DS |
2067 | |
2068 | ||
2069 | static int tls_connection_engine_client_cert(struct tls_connection *conn, | |
2070 | const char *cert_id) | |
2071 | { | |
2072 | #ifndef OPENSSL_NO_ENGINE | |
2073 | X509 *cert; | |
2074 | ||
2075 | if (tls_engine_get_cert(conn, cert_id, &cert)) | |
2076 | return -1; | |
2077 | ||
2078 | if (!SSL_use_certificate(conn->ssl, cert)) { | |
2079 | tls_show_errors(MSG_ERROR, __func__, | |
2080 | "SSL_use_certificate failed"); | |
2081 | X509_free(cert); | |
2082 | return -1; | |
2083 | } | |
2084 | X509_free(cert); | |
2085 | wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> " | |
2086 | "OK"); | |
2087 | return 0; | |
2088 | ||
2089 | #else /* OPENSSL_NO_ENGINE */ | |
2090 | return -1; | |
2091 | #endif /* OPENSSL_NO_ENGINE */ | |
2092 | } | |
2093 | ||
2094 | ||
2095 | static int tls_connection_engine_ca_cert(void *_ssl_ctx, | |
2096 | struct tls_connection *conn, | |
2097 | const char *ca_cert_id) | |
2098 | { | |
2099 | #ifndef OPENSSL_NO_ENGINE | |
2100 | X509 *cert; | |
2101 | SSL_CTX *ssl_ctx = _ssl_ctx; | |
2102 | ||
2103 | if (tls_engine_get_cert(conn, ca_cert_id, &cert)) | |
2104 | return -1; | |
2105 | ||
2106 | /* start off the same as tls_connection_ca_cert */ | |
2107 | X509_STORE_free(ssl_ctx->cert_store); | |
2108 | ssl_ctx->cert_store = X509_STORE_new(); | |
2109 | if (ssl_ctx->cert_store == NULL) { | |
2110 | wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new " | |
2111 | "certificate store", __func__); | |
2112 | X509_free(cert); | |
2113 | return -1; | |
2114 | } | |
2115 | if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { | |
2116 | unsigned long err = ERR_peek_error(); | |
2117 | tls_show_errors(MSG_WARNING, __func__, | |
2118 | "Failed to add CA certificate from engine " | |
2119 | "to certificate store"); | |
2120 | if (ERR_GET_LIB(err) == ERR_LIB_X509 && | |
2121 | ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) { | |
2122 | wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert" | |
2123 | " already in hash table error", | |
2124 | __func__); | |
2125 | } else { | |
2126 | X509_free(cert); | |
2127 | return -1; | |
2128 | } | |
2129 | } | |
2130 | X509_free(cert); | |
2131 | wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine " | |
2132 | "to certificate store", __func__); | |
2133 | SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); | |
d8858cad CW |
2134 | conn->ca_cert_verify = 1; |
2135 | ||
e59c91af DS |
2136 | return 0; |
2137 | ||
2138 | #else /* OPENSSL_NO_ENGINE */ | |
2139 | return -1; | |
2140 | #endif /* OPENSSL_NO_ENGINE */ | |
2141 | } | |
2142 | ||
2143 | ||
6fc6879b JM |
2144 | static int tls_connection_engine_private_key(struct tls_connection *conn) |
2145 | { | |
2146 | #ifndef OPENSSL_NO_ENGINE | |
2147 | if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) { | |
2148 | tls_show_errors(MSG_ERROR, __func__, | |
2149 | "ENGINE: cannot use private key for TLS"); | |
2150 | return -1; | |
2151 | } | |
2152 | if (!SSL_check_private_key(conn->ssl)) { | |
2153 | tls_show_errors(MSG_INFO, __func__, | |
2154 | "Private key failed verification"); | |
2155 | return -1; | |
2156 | } | |
2157 | return 0; | |
2158 | #else /* OPENSSL_NO_ENGINE */ | |
2159 | wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but " | |
2160 | "engine support was not compiled in"); | |
2161 | return -1; | |
2162 | #endif /* OPENSSL_NO_ENGINE */ | |
2163 | } | |
2164 | ||
2165 | ||
2166 | static int tls_connection_private_key(void *_ssl_ctx, | |
2167 | struct tls_connection *conn, | |
2168 | const char *private_key, | |
2169 | const char *private_key_passwd, | |
2170 | const u8 *private_key_blob, | |
2171 | size_t private_key_blob_len) | |
2172 | { | |
2173 | SSL_CTX *ssl_ctx = _ssl_ctx; | |
2174 | char *passwd; | |
2175 | int ok; | |
2176 | ||
2177 | if (private_key == NULL && private_key_blob == NULL) | |
2178 | return 0; | |
2179 | ||
2180 | if (private_key_passwd) { | |
2181 | passwd = os_strdup(private_key_passwd); | |
2182 | if (passwd == NULL) | |
2183 | return -1; | |
2184 | } else | |
2185 | passwd = NULL; | |
2186 | ||
2187 | SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb); | |
2188 | SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd); | |
2189 | ||
2190 | ok = 0; | |
2191 | while (private_key_blob) { | |
2192 | if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl, | |
2193 | (u8 *) private_key_blob, | |
2194 | private_key_blob_len) == 1) { | |
2195 | wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_" | |
2196 | "ASN1(EVP_PKEY_RSA) --> OK"); | |
2197 | ok = 1; | |
2198 | break; | |
6fc6879b JM |
2199 | } |
2200 | ||
2201 | if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl, | |
2202 | (u8 *) private_key_blob, | |
2203 | private_key_blob_len) == 1) { | |
2204 | wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_" | |
2205 | "ASN1(EVP_PKEY_DSA) --> OK"); | |
2206 | ok = 1; | |
2207 | break; | |
6fc6879b JM |
2208 | } |
2209 | ||
2210 | if (SSL_use_RSAPrivateKey_ASN1(conn->ssl, | |
2211 | (u8 *) private_key_blob, | |
2212 | private_key_blob_len) == 1) { | |
2213 | wpa_printf(MSG_DEBUG, "OpenSSL: " | |
2214 | "SSL_use_RSAPrivateKey_ASN1 --> OK"); | |
2215 | ok = 1; | |
2216 | break; | |
6fc6879b JM |
2217 | } |
2218 | ||
2219 | if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob, | |
2220 | private_key_blob_len, passwd) == 0) { | |
2221 | wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> " | |
2222 | "OK"); | |
2223 | ok = 1; | |
2224 | break; | |
2225 | } | |
2226 | ||
2227 | break; | |
2228 | } | |
2229 | ||
2230 | while (!ok && private_key) { | |
2231 | #ifndef OPENSSL_NO_STDIO | |
2232 | if (SSL_use_PrivateKey_file(conn->ssl, private_key, | |
2233 | SSL_FILETYPE_ASN1) == 1) { | |
2234 | wpa_printf(MSG_DEBUG, "OpenSSL: " | |
2235 | "SSL_use_PrivateKey_File (DER) --> OK"); | |
2236 | ok = 1; | |
2237 | break; | |
6fc6879b JM |
2238 | } |
2239 | ||
2240 | if (SSL_use_PrivateKey_file(conn->ssl, private_key, | |
2241 | SSL_FILETYPE_PEM) == 1) { | |
2242 | wpa_printf(MSG_DEBUG, "OpenSSL: " | |
2243 | "SSL_use_PrivateKey_File (PEM) --> OK"); | |
2244 | ok = 1; | |
2245 | break; | |
6fc6879b JM |
2246 | } |
2247 | #else /* OPENSSL_NO_STDIO */ | |
2248 | wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", | |
2249 | __func__); | |
2250 | #endif /* OPENSSL_NO_STDIO */ | |
2251 | ||
2252 | if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd) | |
2253 | == 0) { | |
2254 | wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file " | |
2255 | "--> OK"); | |
2256 | ok = 1; | |
2257 | break; | |
2258 | } | |
2259 | ||
2260 | if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) { | |
2261 | wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to " | |
2262 | "access certificate store --> OK"); | |
2263 | ok = 1; | |
2264 | break; | |
2265 | } | |
2266 | ||
2267 | break; | |
2268 | } | |
2269 | ||
2270 | if (!ok) { | |
effab86f JM |
2271 | tls_show_errors(MSG_INFO, __func__, |
2272 | "Failed to load private key"); | |
6fc6879b | 2273 | os_free(passwd); |
6fc6879b JM |
2274 | return -1; |
2275 | } | |
2276 | ERR_clear_error(); | |
2277 | SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL); | |
2278 | os_free(passwd); | |
55651a4b | 2279 | |
6fc6879b JM |
2280 | if (!SSL_check_private_key(conn->ssl)) { |
2281 | tls_show_errors(MSG_INFO, __func__, "Private key failed " | |
2282 | "verification"); | |
2283 | return -1; | |
2284 | } | |
2285 | ||
2286 | wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully"); | |
2287 | return 0; | |
2288 | } | |
2289 | ||
2290 | ||
2291 | static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key, | |
2292 | const char *private_key_passwd) | |
2293 | { | |
2294 | char *passwd; | |
2295 | ||
2296 | if (private_key == NULL) | |
2297 | return 0; | |
2298 | ||
2299 | if (private_key_passwd) { | |
2300 | passwd = os_strdup(private_key_passwd); | |
2301 | if (passwd == NULL) | |
2302 | return -1; | |
2303 | } else | |
2304 | passwd = NULL; | |
2305 | ||
2306 | SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb); | |
2307 | SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd); | |
2308 | if ( | |
2309 | #ifndef OPENSSL_NO_STDIO | |
2310 | SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key, | |
2311 | SSL_FILETYPE_ASN1) != 1 && | |
2312 | SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key, | |
2313 | SSL_FILETYPE_PEM) != 1 && | |
2314 | #endif /* OPENSSL_NO_STDIO */ | |
2315 | tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) { | |
2316 | tls_show_errors(MSG_INFO, __func__, | |
2317 | "Failed to load private key"); | |
2318 | os_free(passwd); | |
2319 | ERR_clear_error(); | |
2320 | return -1; | |
2321 | } | |
2322 | os_free(passwd); | |
2323 | ERR_clear_error(); | |
2324 | SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL); | |
55651a4b | 2325 | |
6fc6879b JM |
2326 | if (!SSL_CTX_check_private_key(ssl_ctx)) { |
2327 | tls_show_errors(MSG_INFO, __func__, | |
2328 | "Private key failed verification"); | |
2329 | return -1; | |
2330 | } | |
2331 | ||
2332 | return 0; | |
2333 | } | |
2334 | ||
2335 | ||
2336 | static int tls_connection_dh(struct tls_connection *conn, const char *dh_file) | |
2337 | { | |
2338 | #ifdef OPENSSL_NO_DH | |
2339 | if (dh_file == NULL) | |
2340 | return 0; | |
2341 | wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but " | |
2342 | "dh_file specified"); | |
2343 | return -1; | |
2344 | #else /* OPENSSL_NO_DH */ | |
2345 | DH *dh; | |
2346 | BIO *bio; | |
2347 | ||
2348 | /* TODO: add support for dh_blob */ | |
2349 | if (dh_file == NULL) | |
2350 | return 0; | |
2351 | if (conn == NULL) | |
2352 | return -1; | |
2353 | ||
2354 | bio = BIO_new_file(dh_file, "r"); | |
2355 | if (bio == NULL) { | |
2356 | wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s", | |
2357 | dh_file, ERR_error_string(ERR_get_error(), NULL)); | |
2358 | return -1; | |
2359 | } | |
2360 | dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); | |
2361 | BIO_free(bio); | |
2362 | #ifndef OPENSSL_NO_DSA | |
2363 | while (dh == NULL) { | |
2364 | DSA *dsa; | |
2365 | wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -" | |
2366 | " trying to parse as DSA params", dh_file, | |
2367 | ERR_error_string(ERR_get_error(), NULL)); | |
2368 | bio = BIO_new_file(dh_file, "r"); | |
2369 | if (bio == NULL) | |
2370 | break; | |
2371 | dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL); | |
2372 | BIO_free(bio); | |
2373 | if (!dsa) { | |
2374 | wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file " | |
2375 | "'%s': %s", dh_file, | |
2376 | ERR_error_string(ERR_get_error(), NULL)); | |
2377 | break; | |
2378 | } | |
2379 | ||
2380 | wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format"); | |
2381 | dh = DSA_dup_DH(dsa); | |
2382 | DSA_free(dsa); | |
2383 | if (dh == NULL) { | |
2384 | wpa_printf(MSG_INFO, "TLS: Failed to convert DSA " | |
2385 | "params into DH params"); | |
2386 | break; | |
2387 | } | |
2388 | break; | |
2389 | } | |
2390 | #endif /* !OPENSSL_NO_DSA */ | |
2391 | if (dh == NULL) { | |
2392 | wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file " | |
2393 | "'%s'", dh_file); | |
2394 | return -1; | |
2395 | } | |
2396 | ||
2397 | if (SSL_set_tmp_dh(conn->ssl, dh) != 1) { | |
2398 | wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': " | |
2399 | "%s", dh_file, | |
2400 | ERR_error_string(ERR_get_error(), NULL)); | |
2401 | DH_free(dh); | |
2402 | return -1; | |
2403 | } | |
2404 | DH_free(dh); | |
2405 | return 0; | |
2406 | #endif /* OPENSSL_NO_DH */ | |
2407 | } | |
2408 | ||
2409 | ||
2410 | static int tls_global_dh(SSL_CTX *ssl_ctx, const char *dh_file) | |
2411 | { | |
2412 | #ifdef OPENSSL_NO_DH | |
2413 | if (dh_file == NULL) | |
2414 | return 0; | |
2415 | wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but " | |
2416 | "dh_file specified"); | |
2417 | return -1; | |
2418 | #else /* OPENSSL_NO_DH */ | |
2419 | DH *dh; | |
2420 | BIO *bio; | |
2421 | ||
2422 | /* TODO: add support for dh_blob */ | |
2423 | if (dh_file == NULL) | |
2424 | return 0; | |
2425 | if (ssl_ctx == NULL) | |
2426 | return -1; | |
2427 | ||
2428 | bio = BIO_new_file(dh_file, "r"); | |
2429 | if (bio == NULL) { | |
2430 | wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s", | |
2431 | dh_file, ERR_error_string(ERR_get_error(), NULL)); | |
2432 | return -1; | |
2433 | } | |
2434 | dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); | |
2435 | BIO_free(bio); | |
2436 | #ifndef OPENSSL_NO_DSA | |
2437 | while (dh == NULL) { | |
2438 | DSA *dsa; | |
2439 | wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -" | |
2440 | " trying to parse as DSA params", dh_file, | |
2441 | ERR_error_string(ERR_get_error(), NULL)); | |
2442 | bio = BIO_new_file(dh_file, "r"); | |
2443 | if (bio == NULL) | |
2444 | break; | |
2445 | dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL); | |
2446 | BIO_free(bio); | |
2447 | if (!dsa) { | |
2448 | wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file " | |
2449 | "'%s': %s", dh_file, | |
2450 | ERR_error_string(ERR_get_error(), NULL)); | |
2451 | break; | |
2452 | } | |
2453 | ||
2454 | wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format"); | |
2455 | dh = DSA_dup_DH(dsa); | |
2456 | DSA_free(dsa); | |
2457 | if (dh == NULL) { | |
2458 | wpa_printf(MSG_INFO, "TLS: Failed to convert DSA " | |
2459 | "params into DH params"); | |
2460 | break; | |
2461 | } | |
2462 | break; | |
2463 | } | |
2464 | #endif /* !OPENSSL_NO_DSA */ | |
2465 | if (dh == NULL) { | |
2466 | wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file " | |
2467 | "'%s'", dh_file); | |
2468 | return -1; | |
2469 | } | |
2470 | ||
2471 | if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) { | |
2472 | wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': " | |
2473 | "%s", dh_file, | |
2474 | ERR_error_string(ERR_get_error(), NULL)); | |
2475 | DH_free(dh); | |
2476 | return -1; | |
2477 | } | |
2478 | DH_free(dh); | |
2479 | return 0; | |
2480 | #endif /* OPENSSL_NO_DH */ | |
2481 | } | |
2482 | ||
2483 | ||
2484 | int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn, | |
2485 | struct tls_keys *keys) | |
2486 | { | |
c9e08af2 JM |
2487 | #ifdef CONFIG_FIPS |
2488 | wpa_printf(MSG_ERROR, "OpenSSL: TLS keys cannot be exported in FIPS " | |
2489 | "mode"); | |
2490 | return -1; | |
2491 | #else /* CONFIG_FIPS */ | |
6fc6879b JM |
2492 | SSL *ssl; |
2493 | ||
2494 | if (conn == NULL || keys == NULL) | |
2495 | return -1; | |
2496 | ssl = conn->ssl; | |
2497 | if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL) | |
2498 | return -1; | |
2499 | ||
2500 | os_memset(keys, 0, sizeof(*keys)); | |
2501 | keys->master_key = ssl->session->master_key; | |
2502 | keys->master_key_len = ssl->session->master_key_length; | |
2503 | keys->client_random = ssl->s3->client_random; | |
2504 | keys->client_random_len = SSL3_RANDOM_SIZE; | |
2505 | keys->server_random = ssl->s3->server_random; | |
2506 | keys->server_random_len = SSL3_RANDOM_SIZE; | |
2507 | ||
2508 | return 0; | |
c9e08af2 | 2509 | #endif /* CONFIG_FIPS */ |
6fc6879b JM |
2510 | } |
2511 | ||
2512 | ||
2513 | int tls_connection_prf(void *tls_ctx, struct tls_connection *conn, | |
2514 | const char *label, int server_random_first, | |
2515 | u8 *out, size_t out_len) | |
2516 | { | |
68770ccd JM |
2517 | #if OPENSSL_VERSION_NUMBER >= 0x10001000L |
2518 | SSL *ssl; | |
2519 | if (conn == NULL) | |
2520 | return -1; | |
2521 | if (server_random_first) | |
2522 | return -1; | |
2523 | ssl = conn->ssl; | |
2524 | if (SSL_export_keying_material(ssl, out, out_len, label, | |
2525 | os_strlen(label), NULL, 0, 0) == 1) { | |
2526 | wpa_printf(MSG_DEBUG, "OpenSSL: Using internal PRF"); | |
2527 | return 0; | |
2528 | } | |
2529 | #endif | |
6fc6879b JM |
2530 | return -1; |
2531 | } | |
2532 | ||
2533 | ||
81c85c06 JM |
2534 | static struct wpabuf * |
2535 | openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data, | |
2536 | int server) | |
6fc6879b JM |
2537 | { |
2538 | int res; | |
81c85c06 | 2539 | struct wpabuf *out_data; |
6fc6879b | 2540 | |
51e3eafb JM |
2541 | conn->server = !!server; |
2542 | ||
6fc6879b JM |
2543 | /* |
2544 | * Give TLS handshake data from the server (if available) to OpenSSL | |
2545 | * for processing. | |
2546 | */ | |
2547 | if (in_data && | |
81c85c06 JM |
2548 | BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data)) |
2549 | < 0) { | |
6fc6879b JM |
2550 | tls_show_errors(MSG_INFO, __func__, |
2551 | "Handshake failed - BIO_write"); | |
2552 | return NULL; | |
2553 | } | |
2554 | ||
2555 | /* Initiate TLS handshake or continue the existing handshake */ | |
81c85c06 JM |
2556 | if (server) |
2557 | res = SSL_accept(conn->ssl); | |
2558 | else | |
2559 | res = SSL_connect(conn->ssl); | |
6fc6879b JM |
2560 | if (res != 1) { |
2561 | int err = SSL_get_error(conn->ssl, res); | |
2562 | if (err == SSL_ERROR_WANT_READ) | |
2563 | wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want " | |
2564 | "more data"); | |
2565 | else if (err == SSL_ERROR_WANT_WRITE) | |
2566 | wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to " | |
2567 | "write"); | |
2568 | else { | |
2569 | tls_show_errors(MSG_INFO, __func__, "SSL_connect"); | |
2570 | conn->failed++; | |
2571 | } | |
2572 | } | |
2573 | ||
2574 | /* Get the TLS handshake data to be sent to the server */ | |
2575 | res = BIO_ctrl_pending(conn->ssl_out); | |
2576 | wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res); | |
81c85c06 | 2577 | out_data = wpabuf_alloc(res); |
6fc6879b JM |
2578 | if (out_data == NULL) { |
2579 | wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for " | |
2580 | "handshake output (%d bytes)", res); | |
2581 | if (BIO_reset(conn->ssl_out) < 0) { | |
2582 | tls_show_errors(MSG_INFO, __func__, | |
2583 | "BIO_reset failed"); | |
2584 | } | |
6fc6879b JM |
2585 | return NULL; |
2586 | } | |
81c85c06 JM |
2587 | res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data), |
2588 | res); | |
6fc6879b JM |
2589 | if (res < 0) { |
2590 | tls_show_errors(MSG_INFO, __func__, | |
2591 | "Handshake failed - BIO_read"); | |
2592 | if (BIO_reset(conn->ssl_out) < 0) { | |
2593 | tls_show_errors(MSG_INFO, __func__, | |
2594 | "BIO_reset failed"); | |
2595 | } | |
81c85c06 | 2596 | wpabuf_free(out_data); |
6fc6879b JM |
2597 | return NULL; |
2598 | } | |
81c85c06 | 2599 | wpabuf_put(out_data, res); |
6fc6879b JM |
2600 | |
2601 | return out_data; | |
2602 | } | |
2603 | ||
2604 | ||
81c85c06 JM |
2605 | static struct wpabuf * |
2606 | openssl_get_appl_data(struct tls_connection *conn, size_t max_len) | |
6fc6879b | 2607 | { |
81c85c06 | 2608 | struct wpabuf *appl_data; |
6fc6879b | 2609 | int res; |
6fc6879b | 2610 | |
81c85c06 JM |
2611 | appl_data = wpabuf_alloc(max_len + 100); |
2612 | if (appl_data == NULL) | |
6fc6879b | 2613 | return NULL; |
6fc6879b | 2614 | |
81c85c06 JM |
2615 | res = SSL_read(conn->ssl, wpabuf_mhead(appl_data), |
2616 | wpabuf_size(appl_data)); | |
2617 | if (res < 0) { | |
bf206cad | 2618 | int err = SSL_get_error(conn->ssl, res); |
81c85c06 JM |
2619 | if (err == SSL_ERROR_WANT_READ || |
2620 | err == SSL_ERROR_WANT_WRITE) { | |
2621 | wpa_printf(MSG_DEBUG, "SSL: No Application Data " | |
2622 | "included"); | |
2623 | } else { | |
6fc6879b | 2624 | tls_show_errors(MSG_INFO, __func__, |
81c85c06 JM |
2625 | "Failed to read possible " |
2626 | "Application Data"); | |
6fc6879b | 2627 | } |
81c85c06 | 2628 | wpabuf_free(appl_data); |
6fc6879b JM |
2629 | return NULL; |
2630 | } | |
81c85c06 JM |
2631 | |
2632 | wpabuf_put(appl_data, res); | |
2633 | wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished " | |
2634 | "message", appl_data); | |
2635 | ||
2636 | return appl_data; | |
2637 | } | |
2638 | ||
2639 | ||
2640 | static struct wpabuf * | |
2641 | openssl_connection_handshake(struct tls_connection *conn, | |
2642 | const struct wpabuf *in_data, | |
2643 | struct wpabuf **appl_data, int server) | |
2644 | { | |
2645 | struct wpabuf *out_data; | |
2646 | ||
2647 | if (appl_data) | |
2648 | *appl_data = NULL; | |
2649 | ||
2650 | out_data = openssl_handshake(conn, in_data, server); | |
2651 | if (out_data == NULL) | |
6fc6879b | 2652 | return NULL; |
81c85c06 JM |
2653 | |
2654 | if (SSL_is_init_finished(conn->ssl) && appl_data && in_data) | |
2655 | *appl_data = openssl_get_appl_data(conn, wpabuf_len(in_data)); | |
2656 | ||
6fc6879b JM |
2657 | return out_data; |
2658 | } | |
2659 | ||
2660 | ||
81c85c06 JM |
2661 | struct wpabuf * |
2662 | tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn, | |
2663 | const struct wpabuf *in_data, | |
2664 | struct wpabuf **appl_data) | |
2665 | { | |
2666 | return openssl_connection_handshake(conn, in_data, appl_data, 0); | |
2667 | } | |
2668 | ||
2669 | ||
2670 | struct wpabuf * tls_connection_server_handshake(void *tls_ctx, | |
2671 | struct tls_connection *conn, | |
2672 | const struct wpabuf *in_data, | |
2673 | struct wpabuf **appl_data) | |
2674 | { | |
2675 | return openssl_connection_handshake(conn, in_data, appl_data, 1); | |
2676 | } | |
2677 | ||
2678 | ||
2679 | struct wpabuf * tls_connection_encrypt(void *tls_ctx, | |
2680 | struct tls_connection *conn, | |
2681 | const struct wpabuf *in_data) | |
6fc6879b JM |
2682 | { |
2683 | int res; | |
81c85c06 | 2684 | struct wpabuf *buf; |
6fc6879b JM |
2685 | |
2686 | if (conn == NULL) | |
81c85c06 | 2687 | return NULL; |
6fc6879b JM |
2688 | |
2689 | /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */ | |
2690 | if ((res = BIO_reset(conn->ssl_in)) < 0 || | |
2691 | (res = BIO_reset(conn->ssl_out)) < 0) { | |
2692 | tls_show_errors(MSG_INFO, __func__, "BIO_reset failed"); | |
81c85c06 | 2693 | return NULL; |
6fc6879b | 2694 | } |
81c85c06 | 2695 | res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data)); |
6fc6879b JM |
2696 | if (res < 0) { |
2697 | tls_show_errors(MSG_INFO, __func__, | |
2698 | "Encryption failed - SSL_write"); | |
81c85c06 | 2699 | return NULL; |
6fc6879b JM |
2700 | } |
2701 | ||
2702 | /* Read encrypted data to be sent to the server */ | |
81c85c06 JM |
2703 | buf = wpabuf_alloc(wpabuf_len(in_data) + 300); |
2704 | if (buf == NULL) | |
2705 | return NULL; | |
2706 | res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf)); | |
6fc6879b JM |
2707 | if (res < 0) { |
2708 | tls_show_errors(MSG_INFO, __func__, | |
2709 | "Encryption failed - BIO_read"); | |
81c85c06 JM |
2710 | wpabuf_free(buf); |
2711 | return NULL; | |
6fc6879b | 2712 | } |
81c85c06 | 2713 | wpabuf_put(buf, res); |
6fc6879b | 2714 | |
81c85c06 | 2715 | return buf; |
6fc6879b JM |
2716 | } |
2717 | ||
2718 | ||
81c85c06 JM |
2719 | struct wpabuf * tls_connection_decrypt(void *tls_ctx, |
2720 | struct tls_connection *conn, | |
2721 | const struct wpabuf *in_data) | |
6fc6879b JM |
2722 | { |
2723 | int res; | |
81c85c06 | 2724 | struct wpabuf *buf; |
6fc6879b JM |
2725 | |
2726 | /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */ | |
81c85c06 JM |
2727 | res = BIO_write(conn->ssl_in, wpabuf_head(in_data), |
2728 | wpabuf_len(in_data)); | |
6fc6879b JM |
2729 | if (res < 0) { |
2730 | tls_show_errors(MSG_INFO, __func__, | |
2731 | "Decryption failed - BIO_write"); | |
81c85c06 | 2732 | return NULL; |
6fc6879b JM |
2733 | } |
2734 | if (BIO_reset(conn->ssl_out) < 0) { | |
2735 | tls_show_errors(MSG_INFO, __func__, "BIO_reset failed"); | |
81c85c06 | 2736 | return NULL; |
6fc6879b JM |
2737 | } |
2738 | ||
2739 | /* Read decrypted data for further processing */ | |
81c85c06 JM |
2740 | /* |
2741 | * Even though we try to disable TLS compression, it is possible that | |
2742 | * this cannot be done with all TLS libraries. Add extra buffer space | |
2743 | * to handle the possibility of the decrypted data being longer than | |
2744 | * input data. | |
2745 | */ | |
2746 | buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3); | |
2747 | if (buf == NULL) | |
2748 | return NULL; | |
2749 | res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf)); | |
6fc6879b JM |
2750 | if (res < 0) { |
2751 | tls_show_errors(MSG_INFO, __func__, | |
2752 | "Decryption failed - SSL_read"); | |
a86a7316 | 2753 | wpabuf_free(buf); |
81c85c06 | 2754 | return NULL; |
6fc6879b | 2755 | } |
81c85c06 | 2756 | wpabuf_put(buf, res); |
6fc6879b | 2757 | |
81c85c06 | 2758 | return buf; |
6fc6879b JM |
2759 | } |
2760 | ||
2761 | ||
2762 | int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn) | |
2763 | { | |
2764 | return conn ? conn->ssl->hit : 0; | |
2765 | } | |
2766 | ||
2767 | ||
2768 | int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn, | |
2769 | u8 *ciphers) | |
2770 | { | |
2771 | char buf[100], *pos, *end; | |
2772 | u8 *c; | |
2773 | int ret; | |
2774 | ||
2775 | if (conn == NULL || conn->ssl == NULL || ciphers == NULL) | |
2776 | return -1; | |
2777 | ||
2778 | buf[0] = '\0'; | |
2779 | pos = buf; | |
2780 | end = pos + sizeof(buf); | |
2781 | ||
2782 | c = ciphers; | |
2783 | while (*c != TLS_CIPHER_NONE) { | |
2784 | const char *suite; | |
2785 | ||
2786 | switch (*c) { | |
2787 | case TLS_CIPHER_RC4_SHA: | |
2788 | suite = "RC4-SHA"; | |
2789 | break; | |
2790 | case TLS_CIPHER_AES128_SHA: | |
2791 | suite = "AES128-SHA"; | |
2792 | break; | |
2793 | case TLS_CIPHER_RSA_DHE_AES128_SHA: | |
2794 | suite = "DHE-RSA-AES128-SHA"; | |
2795 | break; | |
2796 | case TLS_CIPHER_ANON_DH_AES128_SHA: | |
2797 | suite = "ADH-AES128-SHA"; | |
2798 | break; | |
2799 | default: | |
2800 | wpa_printf(MSG_DEBUG, "TLS: Unsupported " | |
2801 | "cipher selection: %d", *c); | |
2802 | return -1; | |
2803 | } | |
2804 | ret = os_snprintf(pos, end - pos, ":%s", suite); | |
2805 | if (ret < 0 || ret >= end - pos) | |
2806 | break; | |
2807 | pos += ret; | |
2808 | ||
2809 | c++; | |
2810 | } | |
2811 | ||
2812 | wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1); | |
2813 | ||
2814 | if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) { | |
2815 | tls_show_errors(MSG_INFO, __func__, | |
2816 | "Cipher suite configuration failed"); | |
2817 | return -1; | |
2818 | } | |
2819 | ||
2820 | return 0; | |
2821 | } | |
2822 | ||
2823 | ||
2824 | int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn, | |
2825 | char *buf, size_t buflen) | |
2826 | { | |
2827 | const char *name; | |
2828 | if (conn == NULL || conn->ssl == NULL) | |
2829 | return -1; | |
2830 | ||
2831 | name = SSL_get_cipher(conn->ssl); | |
2832 | if (name == NULL) | |
2833 | return -1; | |
2834 | ||
2835 | os_strlcpy(buf, name, buflen); | |
2836 | return 0; | |
2837 | } | |
2838 | ||
2839 | ||
2840 | int tls_connection_enable_workaround(void *ssl_ctx, | |
2841 | struct tls_connection *conn) | |
2842 | { | |
2843 | SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS); | |
2844 | ||
2845 | return 0; | |
2846 | } | |
2847 | ||
2848 | ||
1e5839e0 | 2849 | #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) |
6fc6879b JM |
2850 | /* ClientHello TLS extensions require a patch to openssl, so this function is |
2851 | * commented out unless explicitly needed for EAP-FAST in order to be able to | |
2852 | * build this file with unmodified openssl. */ | |
2853 | int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn, | |
2854 | int ext_type, const u8 *data, | |
2855 | size_t data_len) | |
2856 | { | |
0cf03892 | 2857 | if (conn == NULL || conn->ssl == NULL || ext_type != 35) |
6fc6879b JM |
2858 | return -1; |
2859 | ||
0cf03892 JM |
2860 | #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE |
2861 | if (SSL_set_session_ticket_ext(conn->ssl, (void *) data, | |
2862 | data_len) != 1) | |
2863 | return -1; | |
2864 | #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ | |
6fc6879b JM |
2865 | if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data, |
2866 | data_len) != 1) | |
2867 | return -1; | |
0cf03892 | 2868 | #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ |
6fc6879b JM |
2869 | |
2870 | return 0; | |
2871 | } | |
1e5839e0 | 2872 | #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ |
6fc6879b JM |
2873 | |
2874 | ||
2875 | int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn) | |
2876 | { | |
2877 | if (conn == NULL) | |
2878 | return -1; | |
2879 | return conn->failed; | |
2880 | } | |
2881 | ||
2882 | ||
2883 | int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn) | |
2884 | { | |
2885 | if (conn == NULL) | |
2886 | return -1; | |
2887 | return conn->read_alerts; | |
2888 | } | |
2889 | ||
2890 | ||
2891 | int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn) | |
2892 | { | |
2893 | if (conn == NULL) | |
2894 | return -1; | |
2895 | return conn->write_alerts; | |
2896 | } | |
2897 | ||
2898 | ||
080585c0 JM |
2899 | #ifdef HAVE_OCSP |
2900 | ||
2901 | static void ocsp_debug_print_resp(OCSP_RESPONSE *rsp) | |
2902 | { | |
2903 | #ifndef CONFIG_NO_STDOUT_DEBUG | |
080585c0 JM |
2904 | BIO *out; |
2905 | size_t rlen; | |
2906 | char *txt; | |
2907 | int res; | |
2908 | ||
2909 | if (wpa_debug_level > MSG_DEBUG) | |
2910 | return; | |
2911 | ||
2912 | out = BIO_new(BIO_s_mem()); | |
2913 | if (!out) | |
2914 | return; | |
2915 | ||
2916 | OCSP_RESPONSE_print(out, rsp, 0); | |
2917 | rlen = BIO_ctrl_pending(out); | |
2918 | txt = os_malloc(rlen + 1); | |
2919 | if (!txt) { | |
2920 | BIO_free(out); | |
2921 | return; | |
2922 | } | |
2923 | ||
2924 | res = BIO_read(out, txt, rlen); | |
2925 | if (res > 0) { | |
2926 | txt[res] = '\0'; | |
2927 | wpa_printf(MSG_DEBUG, "OpenSSL: OCSP Response\n%s", txt); | |
2928 | } | |
2929 | os_free(txt); | |
2930 | BIO_free(out); | |
2931 | #endif /* CONFIG_NO_STDOUT_DEBUG */ | |
2932 | } | |
2933 | ||
2934 | ||
2935 | static int ocsp_resp_cb(SSL *s, void *arg) | |
2936 | { | |
2937 | struct tls_connection *conn = arg; | |
2938 | const unsigned char *p; | |
2939 | int len, status, reason; | |
2940 | OCSP_RESPONSE *rsp; | |
2941 | OCSP_BASICRESP *basic; | |
2942 | OCSP_CERTID *id; | |
2943 | ASN1_GENERALIZEDTIME *produced_at, *this_update, *next_update; | |
6bf61fb2 JM |
2944 | X509_STORE *store; |
2945 | STACK_OF(X509) *certs = NULL; | |
080585c0 JM |
2946 | |
2947 | len = SSL_get_tlsext_status_ocsp_resp(s, &p); | |
2948 | if (!p) { | |
2949 | wpa_printf(MSG_DEBUG, "OpenSSL: No OCSP response received"); | |
2950 | return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1; | |
2951 | } | |
2952 | ||
2953 | wpa_hexdump(MSG_DEBUG, "OpenSSL: OCSP response", p, len); | |
2954 | ||
2955 | rsp = d2i_OCSP_RESPONSE(NULL, &p, len); | |
2956 | if (!rsp) { | |
2957 | wpa_printf(MSG_INFO, "OpenSSL: Failed to parse OCSP response"); | |
2958 | return 0; | |
2959 | } | |
2960 | ||
2961 | ocsp_debug_print_resp(rsp); | |
2962 | ||
2963 | status = OCSP_response_status(rsp); | |
2964 | if (status != OCSP_RESPONSE_STATUS_SUCCESSFUL) { | |
2965 | wpa_printf(MSG_INFO, "OpenSSL: OCSP responder error %d (%s)", | |
2966 | status, OCSP_response_status_str(status)); | |
2967 | return 0; | |
2968 | } | |
2969 | ||
2970 | basic = OCSP_response_get1_basic(rsp); | |
2971 | if (!basic) { | |
2972 | wpa_printf(MSG_INFO, "OpenSSL: Could not find BasicOCSPResponse"); | |
2973 | return 0; | |
2974 | } | |
2975 | ||
6bf61fb2 JM |
2976 | store = SSL_CTX_get_cert_store(s->ctx); |
2977 | if (conn->peer_issuer) { | |
2978 | wpa_printf(MSG_DEBUG, "OpenSSL: Add issuer"); | |
2979 | X509_print_fp(stdout, conn->peer_issuer); | |
2980 | ||
2981 | if (X509_STORE_add_cert(store, conn->peer_issuer) != 1) { | |
2982 | tls_show_errors(MSG_INFO, __func__, | |
2983 | "OpenSSL: Could not add issuer to certificate store\n"); | |
2984 | } | |
2985 | certs = sk_X509_new_null(); | |
2986 | if (certs) { | |
2987 | X509 *cert; | |
2988 | cert = X509_dup(conn->peer_issuer); | |
2989 | if (cert && !sk_X509_push(certs, cert)) { | |
2990 | tls_show_errors( | |
2991 | MSG_INFO, __func__, | |
2992 | "OpenSSL: Could not add issuer to OCSP responder trust store\n"); | |
2993 | X509_free(cert); | |
2994 | sk_X509_free(certs); | |
2995 | certs = NULL; | |
2996 | } | |
2997 | if (conn->peer_issuer_issuer) { | |
2998 | cert = X509_dup(conn->peer_issuer_issuer); | |
2999 | if (cert && !sk_X509_push(certs, cert)) { | |
3000 | tls_show_errors( | |
3001 | MSG_INFO, __func__, | |
3002 | "OpenSSL: Could not add issuer to OCSP responder trust store\n"); | |
3003 | X509_free(cert); | |
3004 | } | |
3005 | } | |
3006 | } | |
3007 | } | |
3008 | ||
3009 | status = OCSP_basic_verify(basic, certs, store, OCSP_TRUSTOTHER); | |
3010 | sk_X509_pop_free(certs, X509_free); | |
080585c0 JM |
3011 | if (status <= 0) { |
3012 | tls_show_errors(MSG_INFO, __func__, | |
3013 | "OpenSSL: OCSP response failed verification"); | |
3014 | OCSP_BASICRESP_free(basic); | |
3015 | OCSP_RESPONSE_free(rsp); | |
3016 | return 0; | |
3017 | } | |
3018 | ||
3019 | wpa_printf(MSG_DEBUG, "OpenSSL: OCSP response verification succeeded"); | |
3020 | ||
762c92a4 JM |
3021 | if (!conn->peer_cert) { |
3022 | wpa_printf(MSG_DEBUG, "OpenSSL: Peer certificate not available for OCSP status check"); | |
3023 | OCSP_BASICRESP_free(basic); | |
3024 | OCSP_RESPONSE_free(rsp); | |
3025 | return 0; | |
3026 | } | |
3027 | ||
3028 | if (!conn->peer_issuer) { | |
3029 | wpa_printf(MSG_DEBUG, "OpenSSL: Peer issuer certificate not available for OCSP status check"); | |
080585c0 JM |
3030 | OCSP_BASICRESP_free(basic); |
3031 | OCSP_RESPONSE_free(rsp); | |
3032 | return 0; | |
3033 | } | |
3034 | ||
3035 | id = OCSP_cert_to_id(NULL, conn->peer_cert, conn->peer_issuer); | |
3036 | if (!id) { | |
3037 | wpa_printf(MSG_DEBUG, "OpenSSL: Could not create OCSP certificate identifier"); | |
3038 | OCSP_BASICRESP_free(basic); | |
3039 | OCSP_RESPONSE_free(rsp); | |
3040 | return 0; | |
3041 | } | |
3042 | ||
3043 | if (!OCSP_resp_find_status(basic, id, &status, &reason, &produced_at, | |
3044 | &this_update, &next_update)) { | |
3045 | wpa_printf(MSG_INFO, "OpenSSL: Could not find current server certificate from OCSP response%s", | |
3046 | (conn->flags & TLS_CONN_REQUIRE_OCSP) ? "" : | |
3047 | " (OCSP not required)"); | |
3048 | OCSP_BASICRESP_free(basic); | |
3049 | OCSP_RESPONSE_free(rsp); | |
3050 | return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1; | |
3051 | } | |
3052 | ||
3053 | if (!OCSP_check_validity(this_update, next_update, 5 * 60, -1)) { | |
3054 | tls_show_errors(MSG_INFO, __func__, | |
3055 | "OpenSSL: OCSP status times invalid"); | |
3056 | OCSP_BASICRESP_free(basic); | |
3057 | OCSP_RESPONSE_free(rsp); | |
3058 | return 0; | |
3059 | } | |
3060 | ||
3061 | OCSP_BASICRESP_free(basic); | |
3062 | OCSP_RESPONSE_free(rsp); | |
3063 | ||
3064 | wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status for server certificate: %s", | |
3065 | OCSP_cert_status_str(status)); | |
3066 | ||
3067 | if (status == V_OCSP_CERTSTATUS_GOOD) | |
3068 | return 1; | |
3069 | if (status == V_OCSP_CERTSTATUS_REVOKED) | |
3070 | return 0; | |
3071 | if (conn->flags & TLS_CONN_REQUIRE_OCSP) { | |
3072 | wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP required"); | |
3073 | return 0; | |
3074 | } | |
be7963b3 | 3075 | wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP was not required, so allow connection to continue"); |
080585c0 JM |
3076 | return 1; |
3077 | } | |
3078 | ||
3079 | ||
3080 | static int ocsp_status_cb(SSL *s, void *arg) | |
3081 | { | |
3082 | char *tmp; | |
3083 | char *resp; | |
3084 | size_t len; | |
3085 | ||
3086 | if (tls_global->ocsp_stapling_response == NULL) { | |
3087 | wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - no response configured"); | |
3088 | return SSL_TLSEXT_ERR_OK; | |
3089 | } | |
3090 | ||
3091 | resp = os_readfile(tls_global->ocsp_stapling_response, &len); | |
3092 | if (resp == NULL) { | |
3093 | wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - could not read response file"); | |
3094 | /* TODO: Build OCSPResponse with responseStatus = internalError | |
3095 | */ | |
3096 | return SSL_TLSEXT_ERR_OK; | |
3097 | } | |
3098 | wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - send cached response"); | |
3099 | tmp = OPENSSL_malloc(len); | |
3100 | if (tmp == NULL) { | |
3101 | os_free(resp); | |
3102 | return SSL_TLSEXT_ERR_ALERT_FATAL; | |
3103 | } | |
3104 | ||
3105 | os_memcpy(tmp, resp, len); | |
3106 | os_free(resp); | |
3107 | SSL_set_tlsext_status_ocsp_resp(s, tmp, len); | |
3108 | ||
3109 | return SSL_TLSEXT_ERR_OK; | |
3110 | } | |
3111 | ||
3112 | #endif /* HAVE_OCSP */ | |
3113 | ||
3114 | ||
6fc6879b JM |
3115 | int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn, |
3116 | const struct tls_connection_params *params) | |
3117 | { | |
3118 | int ret; | |
3119 | unsigned long err; | |
3120 | ||
3121 | if (conn == NULL) | |
3122 | return -1; | |
3123 | ||
3124 | while ((err = ERR_get_error())) { | |
3125 | wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s", | |
3126 | __func__, ERR_error_string(err, NULL)); | |
3127 | } | |
3128 | ||
e59c91af DS |
3129 | if (params->engine) { |
3130 | wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine"); | |
3131 | ret = tls_engine_init(conn, params->engine_id, params->pin, | |
3132 | params->key_id, params->cert_id, | |
3133 | params->ca_cert_id); | |
3134 | if (ret) | |
3135 | return ret; | |
3136 | } | |
6fc6879b JM |
3137 | if (tls_connection_set_subject_match(conn, |
3138 | params->subject_match, | |
01f809c7 JM |
3139 | params->altsubject_match, |
3140 | params->suffix_match)) | |
6fc6879b | 3141 | return -1; |
e59c91af DS |
3142 | |
3143 | if (params->engine && params->ca_cert_id) { | |
3144 | if (tls_connection_engine_ca_cert(tls_ctx, conn, | |
3145 | params->ca_cert_id)) | |
3146 | return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; | |
3147 | } else if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert, | |
3148 | params->ca_cert_blob, | |
3149 | params->ca_cert_blob_len, | |
3150 | params->ca_path)) | |
6fc6879b | 3151 | return -1; |
e59c91af DS |
3152 | |
3153 | if (params->engine && params->cert_id) { | |
3154 | if (tls_connection_engine_client_cert(conn, params->cert_id)) | |
3155 | return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; | |
3156 | } else if (tls_connection_client_cert(conn, params->client_cert, | |
3157 | params->client_cert_blob, | |
3158 | params->client_cert_blob_len)) | |
6fc6879b JM |
3159 | return -1; |
3160 | ||
e59c91af DS |
3161 | if (params->engine && params->key_id) { |
3162 | wpa_printf(MSG_DEBUG, "TLS: Using private key from engine"); | |
6fc6879b JM |
3163 | if (tls_connection_engine_private_key(conn)) |
3164 | return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; | |
3165 | } else if (tls_connection_private_key(tls_ctx, conn, | |
3166 | params->private_key, | |
3167 | params->private_key_passwd, | |
3168 | params->private_key_blob, | |
3169 | params->private_key_blob_len)) { | |
3170 | wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'", | |
3171 | params->private_key); | |
3172 | return -1; | |
3173 | } | |
3174 | ||
3175 | if (tls_connection_dh(conn, params->dh_file)) { | |
3176 | wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'", | |
3177 | params->dh_file); | |
3178 | return -1; | |
3179 | } | |
3180 | ||
e866f39f JM |
3181 | #ifdef SSL_OP_NO_TICKET |
3182 | if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET) | |
3183 | SSL_set_options(conn->ssl, SSL_OP_NO_TICKET); | |
d53d2596 | 3184 | #ifdef SSL_clear_options |
e866f39f JM |
3185 | else |
3186 | SSL_clear_options(conn->ssl, SSL_OP_NO_TICKET); | |
d53d2596 | 3187 | #endif /* SSL_clear_options */ |
e866f39f JM |
3188 | #endif /* SSL_OP_NO_TICKET */ |
3189 | ||
080585c0 JM |
3190 | #ifdef HAVE_OCSP |
3191 | if (params->flags & TLS_CONN_REQUEST_OCSP) { | |
81cbc046 | 3192 | SSL_CTX *ssl_ctx = tls_ctx; |
080585c0 JM |
3193 | SSL_set_tlsext_status_type(conn->ssl, TLSEXT_STATUSTYPE_ocsp); |
3194 | SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_resp_cb); | |
3195 | SSL_CTX_set_tlsext_status_arg(ssl_ctx, conn); | |
3196 | } | |
3197 | #endif /* HAVE_OCSP */ | |
3198 | ||
235279e7 JM |
3199 | conn->flags = params->flags; |
3200 | ||
6fc6879b JM |
3201 | tls_get_errors(tls_ctx); |
3202 | ||
3203 | return 0; | |
3204 | } | |
3205 | ||
3206 | ||
3207 | int tls_global_set_params(void *tls_ctx, | |
3208 | const struct tls_connection_params *params) | |
3209 | { | |
3210 | SSL_CTX *ssl_ctx = tls_ctx; | |
3211 | unsigned long err; | |
3212 | ||
3213 | while ((err = ERR_get_error())) { | |
3214 | wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s", | |
3215 | __func__, ERR_error_string(err, NULL)); | |
3216 | } | |
3217 | ||
3218 | if (tls_global_ca_cert(ssl_ctx, params->ca_cert)) | |
3219 | return -1; | |
3220 | ||
3221 | if (tls_global_client_cert(ssl_ctx, params->client_cert)) | |
3222 | return -1; | |
3223 | ||
3224 | if (tls_global_private_key(ssl_ctx, params->private_key, | |
3225 | params->private_key_passwd)) | |
3226 | return -1; | |
3227 | ||
3228 | if (tls_global_dh(ssl_ctx, params->dh_file)) { | |
3229 | wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'", | |
3230 | params->dh_file); | |
3231 | return -1; | |
3232 | } | |
3233 | ||
e866f39f JM |
3234 | #ifdef SSL_OP_NO_TICKET |
3235 | if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET) | |
3236 | SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_TICKET); | |
d53d2596 | 3237 | #ifdef SSL_CTX_clear_options |
e866f39f JM |
3238 | else |
3239 | SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TICKET); | |
d53d2596 | 3240 | #endif /* SSL_clear_options */ |
e866f39f JM |
3241 | #endif /* SSL_OP_NO_TICKET */ |
3242 | ||
080585c0 JM |
3243 | #ifdef HAVE_OCSP |
3244 | SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_status_cb); | |
3245 | SSL_CTX_set_tlsext_status_arg(ssl_ctx, ssl_ctx); | |
3246 | os_free(tls_global->ocsp_stapling_response); | |
3247 | if (params->ocsp_stapling_response) | |
3248 | tls_global->ocsp_stapling_response = | |
3249 | os_strdup(params->ocsp_stapling_response); | |
3250 | else | |
3251 | tls_global->ocsp_stapling_response = NULL; | |
3252 | #endif /* HAVE_OCSP */ | |
3253 | ||
6fc6879b JM |
3254 | return 0; |
3255 | } | |
3256 | ||
3257 | ||
3258 | int tls_connection_get_keyblock_size(void *tls_ctx, | |
3259 | struct tls_connection *conn) | |
3260 | { | |
3261 | const EVP_CIPHER *c; | |
3262 | const EVP_MD *h; | |
7f996409 | 3263 | int md_size; |
6fc6879b JM |
3264 | |
3265 | if (conn == NULL || conn->ssl == NULL || | |
3266 | conn->ssl->enc_read_ctx == NULL || | |
3267 | conn->ssl->enc_read_ctx->cipher == NULL || | |
3268 | conn->ssl->read_hash == NULL) | |
3269 | return -1; | |
3270 | ||
3271 | c = conn->ssl->enc_read_ctx->cipher; | |
3272 | #if OPENSSL_VERSION_NUMBER >= 0x00909000L | |
3273 | h = EVP_MD_CTX_md(conn->ssl->read_hash); | |
3274 | #else | |
3275 | h = conn->ssl->read_hash; | |
3276 | #endif | |
7f996409 JM |
3277 | if (h) |
3278 | md_size = EVP_MD_size(h); | |
3279 | #if OPENSSL_VERSION_NUMBER >= 0x10000000L | |
3280 | else if (conn->ssl->s3) | |
3281 | md_size = conn->ssl->s3->tmp.new_mac_secret_size; | |
3282 | #endif | |
3283 | else | |
3284 | return -1; | |
6fc6879b | 3285 | |
7f996409 JM |
3286 | wpa_printf(MSG_DEBUG, "OpenSSL: keyblock size: key_len=%d MD_size=%d " |
3287 | "IV_len=%d", EVP_CIPHER_key_length(c), md_size, | |
3288 | EVP_CIPHER_iv_length(c)); | |
6fc6879b | 3289 | return 2 * (EVP_CIPHER_key_length(c) + |
7f996409 | 3290 | md_size + |
6fc6879b JM |
3291 | EVP_CIPHER_iv_length(c)); |
3292 | } | |
3293 | ||
3294 | ||
3295 | unsigned int tls_capabilities(void *tls_ctx) | |
3296 | { | |
3297 | return 0; | |
3298 | } | |
3299 | ||
3300 | ||
1e5839e0 | 3301 | #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) |
6fc6879b JM |
3302 | /* Pre-shared secred requires a patch to openssl, so this function is |
3303 | * commented out unless explicitly needed for EAP-FAST in order to be able to | |
3304 | * build this file with unmodified openssl. */ | |
3305 | ||
3306 | static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len, | |
3307 | STACK_OF(SSL_CIPHER) *peer_ciphers, | |
3308 | SSL_CIPHER **cipher, void *arg) | |
3309 | { | |
3310 | struct tls_connection *conn = arg; | |
3311 | int ret; | |
3312 | ||
3313 | if (conn == NULL || conn->session_ticket_cb == NULL) | |
3314 | return 0; | |
3315 | ||
3316 | ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx, | |
3317 | conn->session_ticket, | |
3318 | conn->session_ticket_len, | |
3319 | s->s3->client_random, | |
3320 | s->s3->server_random, secret); | |
3321 | os_free(conn->session_ticket); | |
3322 | conn->session_ticket = NULL; | |
3323 | ||
3324 | if (ret <= 0) | |
3325 | return 0; | |
3326 | ||
3327 | *secret_len = SSL_MAX_MASTER_KEY_LENGTH; | |
3328 | return 1; | |
3329 | } | |
3330 | ||
3331 | ||
0cf03892 JM |
3332 | #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE |
3333 | static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data, | |
3334 | int len, void *arg) | |
3335 | { | |
3336 | struct tls_connection *conn = arg; | |
3337 | ||
3338 | if (conn == NULL || conn->session_ticket_cb == NULL) | |
3339 | return 0; | |
3340 | ||
3341 | wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len); | |
3342 | ||
3343 | os_free(conn->session_ticket); | |
3344 | conn->session_ticket = NULL; | |
3345 | ||
3346 | wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " | |
3347 | "extension", data, len); | |
3348 | ||
3349 | conn->session_ticket = os_malloc(len); | |
3350 | if (conn->session_ticket == NULL) | |
3351 | return 0; | |
3352 | ||
3353 | os_memcpy(conn->session_ticket, data, len); | |
3354 | conn->session_ticket_len = len; | |
3355 | ||
3356 | return 1; | |
3357 | } | |
3358 | #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ | |
6fc6879b JM |
3359 | #ifdef SSL_OP_NO_TICKET |
3360 | static void tls_hello_ext_cb(SSL *s, int client_server, int type, | |
3361 | unsigned char *data, int len, void *arg) | |
3362 | { | |
3363 | struct tls_connection *conn = arg; | |
3364 | ||
3365 | if (conn == NULL || conn->session_ticket_cb == NULL) | |
3366 | return; | |
3367 | ||
3368 | wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__, | |
3369 | type, len); | |
3370 | ||
3371 | if (type == TLSEXT_TYPE_session_ticket && !client_server) { | |
3372 | os_free(conn->session_ticket); | |
3373 | conn->session_ticket = NULL; | |
3374 | ||
3375 | wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " | |
3376 | "extension", data, len); | |
3377 | conn->session_ticket = os_malloc(len); | |
3378 | if (conn->session_ticket == NULL) | |
3379 | return; | |
3380 | ||
3381 | os_memcpy(conn->session_ticket, data, len); | |
3382 | conn->session_ticket_len = len; | |
3383 | } | |
3384 | } | |
3385 | #else /* SSL_OP_NO_TICKET */ | |
3386 | static int tls_hello_ext_cb(SSL *s, TLS_EXTENSION *ext, void *arg) | |
3387 | { | |
3388 | struct tls_connection *conn = arg; | |
3389 | ||
3390 | if (conn == NULL || conn->session_ticket_cb == NULL) | |
3391 | return 0; | |
3392 | ||
3393 | wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__, | |
3394 | ext->type, ext->length); | |
3395 | ||
3396 | os_free(conn->session_ticket); | |
3397 | conn->session_ticket = NULL; | |
3398 | ||
3399 | if (ext->type == 35) { | |
3400 | wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " | |
3401 | "extension", ext->data, ext->length); | |
3402 | conn->session_ticket = os_malloc(ext->length); | |
3403 | if (conn->session_ticket == NULL) | |
3404 | return SSL_AD_INTERNAL_ERROR; | |
3405 | ||
3406 | os_memcpy(conn->session_ticket, ext->data, ext->length); | |
3407 | conn->session_ticket_len = ext->length; | |
3408 | } | |
3409 | ||
3410 | return 0; | |
3411 | } | |
3412 | #endif /* SSL_OP_NO_TICKET */ | |
0cf03892 | 3413 | #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ |
1e5839e0 | 3414 | #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ |
6fc6879b JM |
3415 | |
3416 | ||
3417 | int tls_connection_set_session_ticket_cb(void *tls_ctx, | |
3418 | struct tls_connection *conn, | |
3419 | tls_session_ticket_cb cb, | |
3420 | void *ctx) | |
3421 | { | |
1e5839e0 | 3422 | #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) |
6fc6879b JM |
3423 | conn->session_ticket_cb = cb; |
3424 | conn->session_ticket_cb_ctx = ctx; | |
3425 | ||
3426 | if (cb) { | |
3427 | if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb, | |
3428 | conn) != 1) | |
3429 | return -1; | |
0cf03892 JM |
3430 | #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE |
3431 | SSL_set_session_ticket_ext_cb(conn->ssl, | |
3432 | tls_session_ticket_ext_cb, conn); | |
3433 | #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ | |
6fc6879b JM |
3434 | #ifdef SSL_OP_NO_TICKET |
3435 | SSL_set_tlsext_debug_callback(conn->ssl, tls_hello_ext_cb); | |
3436 | SSL_set_tlsext_debug_arg(conn->ssl, conn); | |
3437 | #else /* SSL_OP_NO_TICKET */ | |
3438 | if (SSL_set_hello_extension_cb(conn->ssl, tls_hello_ext_cb, | |
3439 | conn) != 1) | |
3440 | return -1; | |
3441 | #endif /* SSL_OP_NO_TICKET */ | |
0cf03892 | 3442 | #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ |
6fc6879b JM |
3443 | } else { |
3444 | if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1) | |
3445 | return -1; | |
0cf03892 JM |
3446 | #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE |
3447 | SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL); | |
3448 | #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ | |
6fc6879b JM |
3449 | #ifdef SSL_OP_NO_TICKET |
3450 | SSL_set_tlsext_debug_callback(conn->ssl, NULL); | |
3451 | SSL_set_tlsext_debug_arg(conn->ssl, conn); | |
3452 | #else /* SSL_OP_NO_TICKET */ | |
3453 | if (SSL_set_hello_extension_cb(conn->ssl, NULL, NULL) != 1) | |
3454 | return -1; | |
3455 | #endif /* SSL_OP_NO_TICKET */ | |
0cf03892 | 3456 | #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ |
6fc6879b JM |
3457 | } |
3458 | ||
3459 | return 0; | |
1e5839e0 | 3460 | #else /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ |
6fc6879b | 3461 | return -1; |
1e5839e0 | 3462 | #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ |
6fc6879b | 3463 | } |