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6fc6879b | 1 | /* |
81c85c06 | 2 | * SSL/TLS interface definition |
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 | #ifndef TLS_H | |
10 | #define TLS_H | |
11 | ||
12 | struct tls_connection; | |
13 | ||
14 | struct tls_keys { | |
15 | const u8 *master_key; /* TLS master secret */ | |
16 | size_t master_key_len; | |
17 | const u8 *client_random; | |
18 | size_t client_random_len; | |
19 | const u8 *server_random; | |
20 | size_t server_random_len; | |
6fc6879b JM |
21 | }; |
22 | ||
00468b46 | 23 | enum tls_event { |
dd7fec1f | 24 | TLS_CERT_CHAIN_SUCCESS, |
00468b46 | 25 | TLS_CERT_CHAIN_FAILURE, |
dd7fec1f PS |
26 | TLS_PEER_CERTIFICATE, |
27 | TLS_ALERT | |
00468b46 JM |
28 | }; |
29 | ||
30 | /* | |
31 | * Note: These are used as identifier with external programs and as such, the | |
32 | * values must not be changed. | |
33 | */ | |
34 | enum tls_fail_reason { | |
35 | TLS_FAIL_UNSPECIFIED = 0, | |
36 | TLS_FAIL_UNTRUSTED = 1, | |
37 | TLS_FAIL_REVOKED = 2, | |
38 | TLS_FAIL_NOT_YET_VALID = 3, | |
39 | TLS_FAIL_EXPIRED = 4, | |
40 | TLS_FAIL_SUBJECT_MISMATCH = 5, | |
41 | TLS_FAIL_ALTSUBJECT_MISMATCH = 6, | |
42 | TLS_FAIL_BAD_CERTIFICATE = 7, | |
43 | TLS_FAIL_SERVER_CHAIN_PROBE = 8 | |
44 | }; | |
45 | ||
46 | union tls_event_data { | |
47 | struct { | |
48 | int depth; | |
49 | const char *subject; | |
50 | enum tls_fail_reason reason; | |
51 | const char *reason_txt; | |
52 | const struct wpabuf *cert; | |
53 | } cert_fail; | |
54 | ||
55 | struct { | |
56 | int depth; | |
57 | const char *subject; | |
58 | const struct wpabuf *cert; | |
59 | const u8 *hash; | |
60 | size_t hash_len; | |
61 | } peer_cert; | |
dd7fec1f PS |
62 | |
63 | struct { | |
64 | int is_local; | |
65 | const char *type; | |
66 | const char *description; | |
67 | } alert; | |
00468b46 JM |
68 | }; |
69 | ||
6fc6879b JM |
70 | struct tls_config { |
71 | const char *opensc_engine_path; | |
72 | const char *pkcs11_engine_path; | |
73 | const char *pkcs11_module_path; | |
76f04b38 | 74 | int fips_mode; |
1b414f59 | 75 | int cert_in_cb; |
00468b46 JM |
76 | |
77 | void (*event_cb)(void *ctx, enum tls_event ev, | |
78 | union tls_event_data *data); | |
79 | void *cb_ctx; | |
6fc6879b JM |
80 | }; |
81 | ||
29446569 JM |
82 | #define TLS_CONN_ALLOW_SIGN_RSA_MD5 BIT(0) |
83 | #define TLS_CONN_DISABLE_TIME_CHECKS BIT(1) | |
e866f39f | 84 | #define TLS_CONN_DISABLE_SESSION_TICKET BIT(2) |
080585c0 JM |
85 | #define TLS_CONN_REQUEST_OCSP BIT(3) |
86 | #define TLS_CONN_REQUIRE_OCSP BIT(4) | |
29446569 | 87 | |
6fc6879b JM |
88 | /** |
89 | * struct tls_connection_params - Parameters for TLS connection | |
90 | * @ca_cert: File or reference name for CA X.509 certificate in PEM or DER | |
91 | * format | |
92 | * @ca_cert_blob: ca_cert as inlined data or %NULL if not used | |
93 | * @ca_cert_blob_len: ca_cert_blob length | |
94 | * @ca_path: Path to CA certificates (OpenSSL specific) | |
95 | * @subject_match: String to match in the subject of the peer certificate or | |
96 | * %NULL to allow all subjects | |
97 | * @altsubject_match: String to match in the alternative subject of the peer | |
98 | * certificate or %NULL to allow all alternative subjects | |
99 | * @client_cert: File or reference name for client X.509 certificate in PEM or | |
100 | * DER format | |
101 | * @client_cert_blob: client_cert as inlined data or %NULL if not used | |
102 | * @client_cert_blob_len: client_cert_blob length | |
103 | * @private_key: File or reference name for client private key in PEM or DER | |
104 | * format (traditional format (RSA PRIVATE KEY) or PKCS#8 (PRIVATE KEY) | |
105 | * @private_key_blob: private_key as inlined data or %NULL if not used | |
106 | * @private_key_blob_len: private_key_blob length | |
107 | * @private_key_passwd: Passphrase for decrypted private key, %NULL if no | |
108 | * passphrase is used. | |
109 | * @dh_file: File name for DH/DSA data in PEM format, or %NULL if not used | |
110 | * @dh_blob: dh_file as inlined data or %NULL if not used | |
111 | * @dh_blob_len: dh_blob length | |
112 | * @engine: 1 = use engine (e.g., a smartcard) for private key operations | |
113 | * (this is OpenSSL specific for now) | |
114 | * @engine_id: engine id string (this is OpenSSL specific for now) | |
115 | * @ppin: pointer to the pin variable in the configuration | |
116 | * (this is OpenSSL specific for now) | |
e59c91af DS |
117 | * @key_id: the private key's id when using engine (this is OpenSSL |
118 | * specific for now) | |
119 | * @cert_id: the certificate's id when using engine | |
120 | * @ca_cert_id: the CA certificate's id when using engine | |
29446569 | 121 | * @flags: Parameter options (TLS_CONN_*) |
080585c0 JM |
122 | * @ocsp_stapling_response: DER encoded file with cached OCSP stapling response |
123 | * or %NULL if OCSP is not enabled | |
6fc6879b JM |
124 | * |
125 | * TLS connection parameters to be configured with tls_connection_set_params() | |
126 | * and tls_global_set_params(). | |
127 | * | |
128 | * Certificates and private key can be configured either as a reference name | |
129 | * (file path or reference to certificate store) or by providing the same data | |
130 | * as a pointer to the data in memory. Only one option will be used for each | |
131 | * field. | |
132 | */ | |
133 | struct tls_connection_params { | |
134 | const char *ca_cert; | |
135 | const u8 *ca_cert_blob; | |
136 | size_t ca_cert_blob_len; | |
137 | const char *ca_path; | |
138 | const char *subject_match; | |
139 | const char *altsubject_match; | |
140 | const char *client_cert; | |
141 | const u8 *client_cert_blob; | |
142 | size_t client_cert_blob_len; | |
143 | const char *private_key; | |
144 | const u8 *private_key_blob; | |
145 | size_t private_key_blob_len; | |
146 | const char *private_key_passwd; | |
147 | const char *dh_file; | |
148 | const u8 *dh_blob; | |
149 | size_t dh_blob_len; | |
6fc6879b JM |
150 | |
151 | /* OpenSSL specific variables */ | |
152 | int engine; | |
153 | const char *engine_id; | |
154 | const char *pin; | |
155 | const char *key_id; | |
e59c91af DS |
156 | const char *cert_id; |
157 | const char *ca_cert_id; | |
29446569 JM |
158 | |
159 | unsigned int flags; | |
080585c0 | 160 | const char *ocsp_stapling_response; |
6fc6879b JM |
161 | }; |
162 | ||
163 | ||
164 | /** | |
165 | * tls_init - Initialize TLS library | |
166 | * @conf: Configuration data for TLS library | |
167 | * Returns: Context data to be used as tls_ctx in calls to other functions, | |
168 | * or %NULL on failure. | |
169 | * | |
170 | * Called once during program startup and once for each RSN pre-authentication | |
171 | * session. In other words, there can be two concurrent TLS contexts. If global | |
172 | * library initialization is needed (i.e., one that is shared between both | |
173 | * authentication types), the TLS library wrapper should maintain a reference | |
174 | * counter and do global initialization only when moving from 0 to 1 reference. | |
175 | */ | |
176 | void * tls_init(const struct tls_config *conf); | |
177 | ||
178 | /** | |
179 | * tls_deinit - Deinitialize TLS library | |
180 | * @tls_ctx: TLS context data from tls_init() | |
181 | * | |
182 | * Called once during program shutdown and once for each RSN pre-authentication | |
183 | * session. If global library deinitialization is needed (i.e., one that is | |
184 | * shared between both authentication types), the TLS library wrapper should | |
185 | * maintain a reference counter and do global deinitialization only when moving | |
186 | * from 1 to 0 references. | |
187 | */ | |
188 | void tls_deinit(void *tls_ctx); | |
189 | ||
190 | /** | |
191 | * tls_get_errors - Process pending errors | |
192 | * @tls_ctx: TLS context data from tls_init() | |
193 | * Returns: Number of found error, 0 if no errors detected. | |
194 | * | |
195 | * Process all pending TLS errors. | |
196 | */ | |
197 | int tls_get_errors(void *tls_ctx); | |
198 | ||
199 | /** | |
200 | * tls_connection_init - Initialize a new TLS connection | |
201 | * @tls_ctx: TLS context data from tls_init() | |
202 | * Returns: Connection context data, conn for other function calls | |
203 | */ | |
204 | struct tls_connection * tls_connection_init(void *tls_ctx); | |
205 | ||
206 | /** | |
207 | * tls_connection_deinit - Free TLS connection data | |
208 | * @tls_ctx: TLS context data from tls_init() | |
209 | * @conn: Connection context data from tls_connection_init() | |
210 | * | |
211 | * Release all resources allocated for TLS connection. | |
212 | */ | |
213 | void tls_connection_deinit(void *tls_ctx, struct tls_connection *conn); | |
214 | ||
215 | /** | |
216 | * tls_connection_established - Has the TLS connection been completed? | |
217 | * @tls_ctx: TLS context data from tls_init() | |
218 | * @conn: Connection context data from tls_connection_init() | |
219 | * Returns: 1 if TLS connection has been completed, 0 if not. | |
220 | */ | |
221 | int tls_connection_established(void *tls_ctx, struct tls_connection *conn); | |
222 | ||
223 | /** | |
224 | * tls_connection_shutdown - Shutdown TLS connection | |
225 | * @tls_ctx: TLS context data from tls_init() | |
226 | * @conn: Connection context data from tls_connection_init() | |
227 | * Returns: 0 on success, -1 on failure | |
228 | * | |
229 | * Shutdown current TLS connection without releasing all resources. New | |
230 | * connection can be started by using the same conn without having to call | |
231 | * tls_connection_init() or setting certificates etc. again. The new | |
232 | * connection should try to use session resumption. | |
233 | */ | |
234 | int tls_connection_shutdown(void *tls_ctx, struct tls_connection *conn); | |
235 | ||
236 | enum { | |
237 | TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED = -3, | |
238 | TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED = -2 | |
239 | }; | |
240 | ||
241 | /** | |
242 | * tls_connection_set_params - Set TLS connection parameters | |
243 | * @tls_ctx: TLS context data from tls_init() | |
244 | * @conn: Connection context data from tls_connection_init() | |
245 | * @params: Connection parameters | |
246 | * Returns: 0 on success, -1 on failure, | |
247 | * TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED (-2) on possible PIN error causing | |
248 | * PKCS#11 engine failure, or | |
249 | * TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED (-3) on failure to verify the | |
250 | * PKCS#11 engine private key. | |
251 | */ | |
252 | int __must_check | |
253 | tls_connection_set_params(void *tls_ctx, struct tls_connection *conn, | |
254 | const struct tls_connection_params *params); | |
255 | ||
256 | /** | |
257 | * tls_global_set_params - Set TLS parameters for all TLS connection | |
258 | * @tls_ctx: TLS context data from tls_init() | |
259 | * @params: Global TLS parameters | |
260 | * Returns: 0 on success, -1 on failure, | |
261 | * TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED (-2) on possible PIN error causing | |
262 | * PKCS#11 engine failure, or | |
263 | * TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED (-3) on failure to verify the | |
264 | * PKCS#11 engine private key. | |
265 | */ | |
266 | int __must_check tls_global_set_params( | |
267 | void *tls_ctx, const struct tls_connection_params *params); | |
268 | ||
269 | /** | |
270 | * tls_global_set_verify - Set global certificate verification options | |
271 | * @tls_ctx: TLS context data from tls_init() | |
272 | * @check_crl: 0 = do not verify CRLs, 1 = verify CRL for the user certificate, | |
273 | * 2 = verify CRL for all certificates | |
274 | * Returns: 0 on success, -1 on failure | |
275 | */ | |
276 | int __must_check tls_global_set_verify(void *tls_ctx, int check_crl); | |
277 | ||
278 | /** | |
279 | * tls_connection_set_verify - Set certificate verification options | |
280 | * @tls_ctx: TLS context data from tls_init() | |
281 | * @conn: Connection context data from tls_connection_init() | |
282 | * @verify_peer: 1 = verify peer certificate | |
283 | * Returns: 0 on success, -1 on failure | |
284 | */ | |
285 | int __must_check tls_connection_set_verify(void *tls_ctx, | |
286 | struct tls_connection *conn, | |
287 | int verify_peer); | |
288 | ||
6fc6879b JM |
289 | /** |
290 | * tls_connection_get_keys - Get master key and random data from TLS connection | |
291 | * @tls_ctx: TLS context data from tls_init() | |
292 | * @conn: Connection context data from tls_connection_init() | |
293 | * @keys: Structure of key/random data (filled on success) | |
294 | * Returns: 0 on success, -1 on failure | |
295 | */ | |
296 | int __must_check tls_connection_get_keys(void *tls_ctx, | |
297 | struct tls_connection *conn, | |
298 | struct tls_keys *keys); | |
299 | ||
300 | /** | |
301 | * tls_connection_prf - Use TLS-PRF to derive keying material | |
302 | * @tls_ctx: TLS context data from tls_init() | |
303 | * @conn: Connection context data from tls_connection_init() | |
304 | * @label: Label (e.g., description of the key) for PRF | |
305 | * @server_random_first: seed is 0 = client_random|server_random, | |
306 | * 1 = server_random|client_random | |
307 | * @out: Buffer for output data from TLS-PRF | |
308 | * @out_len: Length of the output buffer | |
309 | * Returns: 0 on success, -1 on failure | |
310 | * | |
311 | * This function is optional to implement if tls_connection_get_keys() provides | |
312 | * access to master secret and server/client random values. If these values are | |
313 | * not exported from the TLS library, tls_connection_prf() is required so that | |
314 | * further keying material can be derived from the master secret. If not | |
315 | * implemented, the function will still need to be defined, but it can just | |
cd52acec | 316 | * return -1. Example implementation of this function is in tls_prf_sha1_md5() |
6fc6879b JM |
317 | * when it is called with seed set to client_random|server_random (or |
318 | * server_random|client_random). | |
319 | */ | |
320 | int __must_check tls_connection_prf(void *tls_ctx, | |
321 | struct tls_connection *conn, | |
322 | const char *label, | |
323 | int server_random_first, | |
324 | u8 *out, size_t out_len); | |
325 | ||
326 | /** | |
327 | * tls_connection_handshake - Process TLS handshake (client side) | |
328 | * @tls_ctx: TLS context data from tls_init() | |
329 | * @conn: Connection context data from tls_connection_init() | |
81c85c06 | 330 | * @in_data: Input data from TLS server |
6fc6879b | 331 | * @appl_data: Pointer to application data pointer, or %NULL if dropped |
81c85c06 | 332 | * Returns: Output data, %NULL on failure |
6fc6879b | 333 | * |
81c85c06 | 334 | * The caller is responsible for freeing the returned output data. If the final |
6fc6879b | 335 | * handshake message includes application data, this is decrypted and |
81c85c06 JM |
336 | * appl_data (if not %NULL) is set to point this data. The caller is |
337 | * responsible for freeing appl_data. | |
6fc6879b JM |
338 | * |
339 | * This function is used during TLS handshake. The first call is done with | |
340 | * in_data == %NULL and the library is expected to return ClientHello packet. | |
341 | * This packet is then send to the server and a response from server is given | |
342 | * to TLS library by calling this function again with in_data pointing to the | |
343 | * TLS message from the server. | |
344 | * | |
345 | * If the TLS handshake fails, this function may return %NULL. However, if the | |
346 | * TLS library has a TLS alert to send out, that should be returned as the | |
347 | * output data. In this case, tls_connection_get_failed() must return failure | |
348 | * (> 0). | |
349 | * | |
350 | * tls_connection_established() should return 1 once the TLS handshake has been | |
351 | * completed successfully. | |
352 | */ | |
81c85c06 JM |
353 | struct wpabuf * tls_connection_handshake(void *tls_ctx, |
354 | struct tls_connection *conn, | |
355 | const struct wpabuf *in_data, | |
356 | struct wpabuf **appl_data); | |
6fc6879b | 357 | |
dbdcfa39 JM |
358 | struct wpabuf * tls_connection_handshake2(void *tls_ctx, |
359 | struct tls_connection *conn, | |
360 | const struct wpabuf *in_data, | |
361 | struct wpabuf **appl_data, | |
362 | int *more_data_needed); | |
363 | ||
6fc6879b JM |
364 | /** |
365 | * tls_connection_server_handshake - Process TLS handshake (server side) | |
366 | * @tls_ctx: TLS context data from tls_init() | |
367 | * @conn: Connection context data from tls_connection_init() | |
368 | * @in_data: Input data from TLS peer | |
81c85c06 JM |
369 | * @appl_data: Pointer to application data pointer, or %NULL if dropped |
370 | * Returns: Output data, %NULL on failure | |
6fc6879b | 371 | * |
81c85c06 | 372 | * The caller is responsible for freeing the returned output data. |
6fc6879b | 373 | */ |
81c85c06 JM |
374 | struct wpabuf * tls_connection_server_handshake(void *tls_ctx, |
375 | struct tls_connection *conn, | |
376 | const struct wpabuf *in_data, | |
377 | struct wpabuf **appl_data); | |
6fc6879b JM |
378 | |
379 | /** | |
380 | * tls_connection_encrypt - Encrypt data into TLS tunnel | |
381 | * @tls_ctx: TLS context data from tls_init() | |
382 | * @conn: Connection context data from tls_connection_init() | |
81c85c06 JM |
383 | * @in_data: Plaintext data to be encrypted |
384 | * Returns: Encrypted TLS data or %NULL on failure | |
6fc6879b JM |
385 | * |
386 | * This function is used after TLS handshake has been completed successfully to | |
81c85c06 JM |
387 | * send data in the encrypted tunnel. The caller is responsible for freeing the |
388 | * returned output data. | |
6fc6879b | 389 | */ |
81c85c06 JM |
390 | struct wpabuf * tls_connection_encrypt(void *tls_ctx, |
391 | struct tls_connection *conn, | |
392 | const struct wpabuf *in_data); | |
6fc6879b JM |
393 | |
394 | /** | |
395 | * tls_connection_decrypt - Decrypt data from TLS tunnel | |
396 | * @tls_ctx: TLS context data from tls_init() | |
397 | * @conn: Connection context data from tls_connection_init() | |
81c85c06 JM |
398 | * @in_data: Encrypted TLS data |
399 | * Returns: Decrypted TLS data or %NULL on failure | |
6fc6879b JM |
400 | * |
401 | * This function is used after TLS handshake has been completed successfully to | |
81c85c06 JM |
402 | * receive data from the encrypted tunnel. The caller is responsible for |
403 | * freeing the returned output data. | |
6fc6879b | 404 | */ |
81c85c06 JM |
405 | struct wpabuf * tls_connection_decrypt(void *tls_ctx, |
406 | struct tls_connection *conn, | |
407 | const struct wpabuf *in_data); | |
6fc6879b | 408 | |
dbdcfa39 JM |
409 | struct wpabuf * tls_connection_decrypt2(void *tls_ctx, |
410 | struct tls_connection *conn, | |
411 | const struct wpabuf *in_data, | |
412 | int *more_data_needed); | |
413 | ||
6fc6879b JM |
414 | /** |
415 | * tls_connection_resumed - Was session resumption used | |
416 | * @tls_ctx: TLS context data from tls_init() | |
417 | * @conn: Connection context data from tls_connection_init() | |
418 | * Returns: 1 if current session used session resumption, 0 if not | |
419 | */ | |
420 | int tls_connection_resumed(void *tls_ctx, struct tls_connection *conn); | |
421 | ||
422 | enum { | |
423 | TLS_CIPHER_NONE, | |
424 | TLS_CIPHER_RC4_SHA /* 0x0005 */, | |
425 | TLS_CIPHER_AES128_SHA /* 0x002f */, | |
426 | TLS_CIPHER_RSA_DHE_AES128_SHA /* 0x0031 */, | |
427 | TLS_CIPHER_ANON_DH_AES128_SHA /* 0x0034 */ | |
428 | }; | |
429 | ||
430 | /** | |
431 | * tls_connection_set_cipher_list - Configure acceptable cipher suites | |
432 | * @tls_ctx: TLS context data from tls_init() | |
433 | * @conn: Connection context data from tls_connection_init() | |
434 | * @ciphers: Zero (TLS_CIPHER_NONE) terminated list of allowed ciphers | |
435 | * (TLS_CIPHER_*). | |
436 | * Returns: 0 on success, -1 on failure | |
437 | */ | |
438 | int __must_check tls_connection_set_cipher_list(void *tls_ctx, | |
439 | struct tls_connection *conn, | |
440 | u8 *ciphers); | |
441 | ||
442 | /** | |
443 | * tls_get_cipher - Get current cipher name | |
444 | * @tls_ctx: TLS context data from tls_init() | |
445 | * @conn: Connection context data from tls_connection_init() | |
446 | * @buf: Buffer for the cipher name | |
447 | * @buflen: buf size | |
448 | * Returns: 0 on success, -1 on failure | |
449 | * | |
450 | * Get the name of the currently used cipher. | |
451 | */ | |
452 | int __must_check tls_get_cipher(void *tls_ctx, struct tls_connection *conn, | |
453 | char *buf, size_t buflen); | |
454 | ||
455 | /** | |
456 | * tls_connection_enable_workaround - Enable TLS workaround options | |
457 | * @tls_ctx: TLS context data from tls_init() | |
458 | * @conn: Connection context data from tls_connection_init() | |
459 | * Returns: 0 on success, -1 on failure | |
460 | * | |
461 | * This function is used to enable connection-specific workaround options for | |
462 | * buffer SSL/TLS implementations. | |
463 | */ | |
464 | int __must_check tls_connection_enable_workaround(void *tls_ctx, | |
465 | struct tls_connection *conn); | |
466 | ||
467 | /** | |
468 | * tls_connection_client_hello_ext - Set TLS extension for ClientHello | |
469 | * @tls_ctx: TLS context data from tls_init() | |
470 | * @conn: Connection context data from tls_connection_init() | |
471 | * @ext_type: Extension type | |
472 | * @data: Extension payload (%NULL to remove extension) | |
473 | * @data_len: Extension payload length | |
474 | * Returns: 0 on success, -1 on failure | |
475 | */ | |
476 | int __must_check tls_connection_client_hello_ext(void *tls_ctx, | |
477 | struct tls_connection *conn, | |
478 | int ext_type, const u8 *data, | |
479 | size_t data_len); | |
480 | ||
481 | /** | |
482 | * tls_connection_get_failed - Get connection failure status | |
483 | * @tls_ctx: TLS context data from tls_init() | |
484 | * @conn: Connection context data from tls_connection_init() | |
485 | * | |
486 | * Returns >0 if connection has failed, 0 if not. | |
487 | */ | |
488 | int tls_connection_get_failed(void *tls_ctx, struct tls_connection *conn); | |
489 | ||
490 | /** | |
491 | * tls_connection_get_read_alerts - Get connection read alert status | |
492 | * @tls_ctx: TLS context data from tls_init() | |
493 | * @conn: Connection context data from tls_connection_init() | |
494 | * Returns: Number of times a fatal read (remote end reported error) has | |
495 | * happened during this connection. | |
496 | */ | |
497 | int tls_connection_get_read_alerts(void *tls_ctx, struct tls_connection *conn); | |
498 | ||
499 | /** | |
500 | * tls_connection_get_write_alerts - Get connection write alert status | |
501 | * @tls_ctx: TLS context data from tls_init() | |
502 | * @conn: Connection context data from tls_connection_init() | |
503 | * Returns: Number of times a fatal write (locally detected error) has happened | |
504 | * during this connection. | |
505 | */ | |
506 | int tls_connection_get_write_alerts(void *tls_ctx, | |
507 | struct tls_connection *conn); | |
508 | ||
509 | /** | |
510 | * tls_connection_get_keyblock_size - Get TLS key_block size | |
511 | * @tls_ctx: TLS context data from tls_init() | |
512 | * @conn: Connection context data from tls_connection_init() | |
513 | * Returns: Size of the key_block for the negotiated cipher suite or -1 on | |
514 | * failure | |
515 | */ | |
516 | int tls_connection_get_keyblock_size(void *tls_ctx, | |
517 | struct tls_connection *conn); | |
518 | ||
6fc6879b JM |
519 | /** |
520 | * tls_capabilities - Get supported TLS capabilities | |
521 | * @tls_ctx: TLS context data from tls_init() | |
522 | * Returns: Bit field of supported TLS capabilities (TLS_CAPABILITY_*) | |
523 | */ | |
524 | unsigned int tls_capabilities(void *tls_ctx); | |
525 | ||
6fc6879b JM |
526 | typedef int (*tls_session_ticket_cb) |
527 | (void *ctx, const u8 *ticket, size_t len, const u8 *client_random, | |
528 | const u8 *server_random, u8 *master_secret); | |
529 | ||
530 | int __must_check tls_connection_set_session_ticket_cb( | |
531 | void *tls_ctx, struct tls_connection *conn, | |
532 | tls_session_ticket_cb cb, void *ctx); | |
533 | ||
534 | #endif /* TLS_H */ |