2
* WPA Supplicant / SSL/TLS interface definition
3
* Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
5
* This program is free software; you can redistribute it and/or modify
6
* it under the terms of the GNU General Public License version 2 as
7
* published by the Free Software Foundation.
9
* Alternatively, this software may be distributed under the terms of BSD
12
* See README and COPYING for more details.
18
struct tls_connection;
21
const u8 *master_key; /* TLS master secret */
22
size_t master_key_len;
23
const u8 *client_random;
24
size_t client_random_len;
25
const u8 *server_random;
26
size_t server_random_len;
27
const u8 *inner_secret; /* TLS/IA inner secret */
28
size_t inner_secret_len;
32
const char *opensc_engine_path;
33
const char *pkcs11_engine_path;
34
const char *pkcs11_module_path;
38
* struct tls_connection_params - Parameters for TLS connection
39
* @ca_cert: File or reference name for CA X.509 certificate in PEM or DER
41
* @ca_cert_blob: ca_cert as inlined data or %NULL if not used
42
* @ca_cert_blob_len: ca_cert_blob length
43
* @ca_path: Path to CA certificates (OpenSSL specific)
44
* @subject_match: String to match in the subject of the peer certificate or
45
* %NULL to allow all subjects
46
* @altsubject_match: String to match in the alternative subject of the peer
47
* certificate or %NULL to allow all alternative subjects
48
* @client_cert: File or reference name for client X.509 certificate in PEM or
50
* @client_cert_blob: client_cert as inlined data or %NULL if not used
51
* @client_cert_blob_len: client_cert_blob length
52
* @private_key: File or reference name for client private key in PEM or DER
53
* format (traditional format (RSA PRIVATE KEY) or PKCS#8 (PRIVATE KEY)
54
* @private_key_blob: private_key as inlined data or %NULL if not used
55
* @private_key_blob_len: private_key_blob length
56
* @private_key_passwd: Passphrase for decrypted private key, %NULL if no
58
* @dh_file: File name for DH/DSA data in PEM format, or %NULL if not used
59
* @dh_blob: dh_file as inlined data or %NULL if not used
60
* @dh_blob_len: dh_blob length
61
* @engine: 1 = use engine (e.g., a smartcard) for private key operations
62
* (this is OpenSSL specific for now)
63
* @engine_id: engine id string (this is OpenSSL specific for now)
64
* @ppin: pointer to the pin variable in the configuration
65
* (this is OpenSSL specific for now)
66
* @key_id: the private key's key id (this is OpenSSL specific for now)
67
* @tls_ia: Whether to enable TLS/IA (for EAP-TTLSv1)
69
* TLS connection parameters to be configured with tls_connection_set_params()
70
* and tls_global_set_params().
72
* Certificates and private key can be configured either as a reference name
73
* (file path or reference to certificate store) or by providing the same data
74
* as a pointer to the data in memory. Only one option will be used for each
77
struct tls_connection_params {
79
const u8 *ca_cert_blob;
80
size_t ca_cert_blob_len;
82
const char *subject_match;
83
const char *altsubject_match;
84
const char *client_cert;
85
const u8 *client_cert_blob;
86
size_t client_cert_blob_len;
87
const char *private_key;
88
const u8 *private_key_blob;
89
size_t private_key_blob_len;
90
const char *private_key_passwd;
96
/* OpenSSL specific variables */
98
const char *engine_id;
105
* tls_init - Initialize TLS library
106
* @conf: Configuration data for TLS library
107
* Returns: Context data to be used as tls_ctx in calls to other functions,
108
* or %NULL on failure.
110
* Called once during program startup and once for each RSN pre-authentication
111
* session. In other words, there can be two concurrent TLS contexts. If global
112
* library initialization is needed (i.e., one that is shared between both
113
* authentication types), the TLS library wrapper should maintain a reference
114
* counter and do global initialization only when moving from 0 to 1 reference.
116
void * tls_init(const struct tls_config *conf);
119
* tls_deinit - Deinitialize TLS library
120
* @tls_ctx: TLS context data from tls_init()
122
* Called once during program shutdown and once for each RSN pre-authentication
123
* session. If global library deinitialization is needed (i.e., one that is
124
* shared between both authentication types), the TLS library wrapper should
125
* maintain a reference counter and do global deinitialization only when moving
126
* from 1 to 0 references.
128
void tls_deinit(void *tls_ctx);
131
* tls_get_errors - Process pending errors
132
* @tls_ctx: TLS context data from tls_init()
133
* Returns: Number of found error, 0 if no errors detected.
135
* Process all pending TLS errors.
137
int tls_get_errors(void *tls_ctx);
140
* tls_connection_init - Initialize a new TLS connection
141
* @tls_ctx: TLS context data from tls_init()
142
* Returns: Connection context data, conn for other function calls
144
struct tls_connection * tls_connection_init(void *tls_ctx);
147
* tls_connection_deinit - Free TLS connection data
148
* @tls_ctx: TLS context data from tls_init()
149
* @conn: Connection context data from tls_connection_init()
151
* Release all resources allocated for TLS connection.
153
void tls_connection_deinit(void *tls_ctx, struct tls_connection *conn);
156
* tls_connection_established - Has the TLS connection been completed?
157
* @tls_ctx: TLS context data from tls_init()
158
* @conn: Connection context data from tls_connection_init()
159
* Returns: 1 if TLS connection has been completed, 0 if not.
161
int tls_connection_established(void *tls_ctx, struct tls_connection *conn);
164
* tls_connection_shutdown - Shutdown TLS connection
165
* @tls_ctx: TLS context data from tls_init()
166
* @conn: Connection context data from tls_connection_init()
167
* Returns: 0 on success, -1 on failure
169
* Shutdown current TLS connection without releasing all resources. New
170
* connection can be started by using the same conn without having to call
171
* tls_connection_init() or setting certificates etc. again. The new
172
* connection should try to use session resumption.
174
int tls_connection_shutdown(void *tls_ctx, struct tls_connection *conn);
177
TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED = -3,
178
TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED = -2
182
* tls_connection_set_params - Set TLS connection parameters
183
* @tls_ctx: TLS context data from tls_init()
184
* @conn: Connection context data from tls_connection_init()
185
* @params: Connection parameters
186
* Returns: 0 on success, -1 on failure,
187
* TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED (-2) on possible PIN error causing
188
* PKCS#11 engine failure, or
189
* TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED (-3) on failure to verify the
190
* PKCS#11 engine private key.
192
int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
193
const struct tls_connection_params *params);
196
* tls_global_set_params - Set TLS parameters for all TLS connection
197
* @tls_ctx: TLS context data from tls_init()
198
* @params: Global TLS parameters
199
* Returns: 0 on success, -1 on failure,
200
* TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED (-2) on possible PIN error causing
201
* PKCS#11 engine failure, or
202
* TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED (-3) on failure to verify the
203
* PKCS#11 engine private key.
205
int tls_global_set_params(void *tls_ctx,
206
const struct tls_connection_params *params);
209
* tls_global_set_verify - Set global certificate verification options
210
* @tls_ctx: TLS context data from tls_init()
211
* @check_crl: 0 = do not verify CRLs, 1 = verify CRL for the user certificate,
212
* 2 = verify CRL for all certificates
213
* Returns: 0 on success, -1 on failure
215
int tls_global_set_verify(void *tls_ctx, int check_crl);
218
* tls_connection_set_verify - Set certificate verification options
219
* @tls_ctx: TLS context data from tls_init()
220
* @conn: Connection context data from tls_connection_init()
221
* @verify_peer: 1 = verify peer certificate
222
* Returns: 0 on success, -1 on failure
224
int tls_connection_set_verify(void *tls_ctx, struct tls_connection *conn,
228
* tls_connection_set_ia - Set TLS/IA parameters
229
* @tls_ctx: TLS context data from tls_init()
230
* @conn: Connection context data from tls_connection_init()
231
* @tls_ia: 1 = enable TLS/IA
232
* Returns: 0 on success, -1 on failure
234
* This function is used to configure TLS/IA in server mode where
235
* tls_connection_set_params() is not used.
237
int tls_connection_set_ia(void *tls_ctx, struct tls_connection *conn,
241
* tls_connection_get_keys - Get master key and random data from TLS connection
242
* @tls_ctx: TLS context data from tls_init()
243
* @conn: Connection context data from tls_connection_init()
244
* @keys: Structure of key/random data (filled on success)
245
* Returns: 0 on success, -1 on failure
247
int tls_connection_get_keys(void *tls_ctx, struct tls_connection *conn,
248
struct tls_keys *keys);
251
* tls_connection_prf - Use TLS-PRF to derive keying material
252
* @tls_ctx: TLS context data from tls_init()
253
* @conn: Connection context data from tls_connection_init()
254
* @label: Label (e.g., description of the key) for PRF
255
* @server_random_first: seed is 0 = client_random|server_random,
256
* 1 = server_random|client_random
257
* @out: Buffer for output data from TLS-PRF
258
* @out_len: Length of the output buffer
259
* Returns: 0 on success, -1 on failure
261
* This function is optional to implement if tls_connection_get_keys() provides
262
* access to master secret and server/client random values. If these values are
263
* not exported from the TLS library, tls_connection_prf() is required so that
264
* further keying material can be derived from the master secret. If not
265
* implemented, the function will still need to be defined, but it can just
266
* return -1. Example implementation of this function is in tls_prf() function
267
* when it is called with seed set to client_random|server_random (or
268
* server_random|client_random).
270
int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
271
const char *label, int server_random_first,
272
u8 *out, size_t out_len);
275
* tls_connection_handshake - Process TLS handshake (client side)
276
* @tls_ctx: TLS context data from tls_init()
277
* @conn: Connection context data from tls_connection_init()
278
* @in_data: Input data from TLS peer
279
* @in_len: Input data length
280
* @out_len: Length of the output buffer.
281
* @appl_data: Pointer to application data pointer, or %NULL if dropped
282
* @appl_data_len: Pointer to variable that is set to appl_data length
283
* Returns: Pointer to output data, %NULL on failure
285
* Caller is responsible for freeing returned output data. If the final
286
* handshake message includes application data, this is decrypted and
287
* appl_data (if not %NULL) is set to point this data. Caller is responsible
288
* for freeing appl_data.
290
* This function is used during TLS handshake. The first call is done with
291
* in_data == %NULL and the library is expected to return ClientHello packet.
292
* This packet is then send to the server and a response from server is given
293
* to TLS library by calling this function again with in_data pointing to the
294
* TLS message from the server.
296
* If the TLS handshake fails, this function may return %NULL. However, if the
297
* TLS library has a TLS alert to send out, that should be returned as the
298
* output data. In this case, tls_connection_get_failed() must return failure
301
* tls_connection_established() should return 1 once the TLS handshake has been
302
* completed successfully.
304
u8 * tls_connection_handshake(void *tls_ctx, struct tls_connection *conn,
305
const u8 *in_data, size_t in_len,
306
size_t *out_len, u8 **appl_data,
307
size_t *appl_data_len);
310
* tls_connection_server_handshake - Process TLS handshake (server side)
311
* @tls_ctx: TLS context data from tls_init()
312
* @conn: Connection context data from tls_connection_init()
313
* @in_data: Input data from TLS peer
314
* @in_len: Input data length
315
* @out_len: Length of the output buffer.
316
* Returns: pointer to output data, %NULL on failure
318
* Caller is responsible for freeing returned output data.
320
u8 * tls_connection_server_handshake(void *tls_ctx,
321
struct tls_connection *conn,
322
const u8 *in_data, size_t in_len,
326
* tls_connection_encrypt - Encrypt data into TLS tunnel
327
* @tls_ctx: TLS context data from tls_init()
328
* @conn: Connection context data from tls_connection_init()
329
* @in_data: Pointer to plaintext data to be encrypted
330
* @in_len: Input buffer length
331
* @out_data: Pointer to output buffer (encrypted TLS data)
332
* @out_len: Maximum out_data length
333
* Returns: Number of bytes written to out_data, -1 on failure
335
* This function is used after TLS handshake has been completed successfully to
336
* send data in the encrypted tunnel.
338
int tls_connection_encrypt(void *tls_ctx, struct tls_connection *conn,
339
const u8 *in_data, size_t in_len,
340
u8 *out_data, size_t out_len);
343
* tls_connection_decrypt - Decrypt data from TLS tunnel
344
* @tls_ctx: TLS context data from tls_init()
345
* @conn: Connection context data from tls_connection_init()
346
* @in_data: Pointer to input buffer (encrypted TLS data)
347
* @in_len: Input buffer length
348
* @out_data: Pointer to output buffer (decrypted data from TLS tunnel)
349
* @out_len: Maximum out_data length
350
* Returns: Number of bytes written to out_data, -1 on failure
352
* This function is used after TLS handshake has been completed successfully to
353
* receive data from the encrypted tunnel.
355
int tls_connection_decrypt(void *tls_ctx, struct tls_connection *conn,
356
const u8 *in_data, size_t in_len,
357
u8 *out_data, size_t out_len);
360
* tls_connection_resumed - Was session resumption used
361
* @tls_ctx: TLS context data from tls_init()
362
* @conn: Connection context data from tls_connection_init()
363
* Returns: 1 if current session used session resumption, 0 if not
365
int tls_connection_resumed(void *tls_ctx, struct tls_connection *conn);
368
* tls_connection_set_master_key - Configure master secret for TLS connection
369
* @tls_ctx: TLS context data from tls_init()
370
* @conn: Connection context data from tls_connection_init()
371
* @key: TLS pre-master-secret
372
* @key_len: length of key in bytes
373
* Returns: 0 on success, -1 on failure
375
int tls_connection_set_master_key(void *tls_ctx, struct tls_connection *conn,
376
const u8 *key, size_t key_len);
380
TLS_CIPHER_RC4_SHA /* 0x0005 */,
381
TLS_CIPHER_AES128_SHA /* 0x002f */,
382
TLS_CIPHER_RSA_DHE_AES128_SHA /* 0x0031 */,
383
TLS_CIPHER_ANON_DH_AES128_SHA /* 0x0034 */
387
* tls_connection_set_cipher_list - Configure acceptable cipher suites
388
* @tls_ctx: TLS context data from tls_init()
389
* @conn: Connection context data from tls_connection_init()
390
* @ciphers: Zero (TLS_CIPHER_NONE) terminated list of allowed ciphers
392
* Returns: 0 on success, -1 on failure
394
int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
398
* tls_get_cipher - Get current cipher name
399
* @tls_ctx: TLS context data from tls_init()
400
* @conn: Connection context data from tls_connection_init()
401
* @buf: Buffer for the cipher name
403
* Returns: 0 on success, -1 on failure
405
* Get the name of the currently used cipher.
407
int tls_get_cipher(void *tls_ctx, struct tls_connection *conn,
408
char *buf, size_t buflen);
411
* tls_connection_enable_workaround - Enable TLS workaround options
412
* @tls_ctx: TLS context data from tls_init()
413
* @conn: Connection context data from tls_connection_init()
414
* Returns: 0 on success, -1 on failure
416
* This function is used to enable connection-specific workaround options for
417
* buffer SSL/TLS implementations.
419
int tls_connection_enable_workaround(void *tls_ctx,
420
struct tls_connection *conn);
423
* tls_connection_client_hello_ext - Set TLS extension for ClientHello
424
* @tls_ctx: TLS context data from tls_init()
425
* @conn: Connection context data from tls_connection_init()
426
* @ext_type: Extension type
427
* @data: Extension payload (%NULL to remove extension)
428
* @data_len: Extension payload length
429
* Returns: 0 on success, -1 on failure
431
int tls_connection_client_hello_ext(void *tls_ctx, struct tls_connection *conn,
432
int ext_type, const u8 *data,
436
* tls_connection_get_failed - Get connection failure status
437
* @tls_ctx: TLS context data from tls_init()
438
* @conn: Connection context data from tls_connection_init()
440
* Returns >0 if connection has failed, 0 if not.
442
int tls_connection_get_failed(void *tls_ctx, struct tls_connection *conn);
445
* tls_connection_get_read_alerts - Get connection read alert status
446
* @tls_ctx: TLS context data from tls_init()
447
* @conn: Connection context data from tls_connection_init()
448
* Returns: Number of times a fatal read (remote end reported error) has
449
* happened during this connection.
451
int tls_connection_get_read_alerts(void *tls_ctx, struct tls_connection *conn);
454
* tls_connection_get_write_alerts - Get connection write alert status
455
* @tls_ctx: TLS context data from tls_init()
456
* @conn: Connection context data from tls_connection_init()
457
* Returns: Number of times a fatal write (locally detected error) has happened
458
* during this connection.
460
int tls_connection_get_write_alerts(void *tls_ctx,
461
struct tls_connection *conn);
464
* tls_connection_get_keyblock_size - Get TLS key_block size
465
* @tls_ctx: TLS context data from tls_init()
466
* @conn: Connection context data from tls_connection_init()
467
* Returns: Size of the key_block for the negotiated cipher suite or -1 on
470
int tls_connection_get_keyblock_size(void *tls_ctx,
471
struct tls_connection *conn);
473
#define TLS_CAPABILITY_IA 0x0001 /* TLS Inner Application (TLS/IA) */
475
* tls_capabilities - Get supported TLS capabilities
476
* @tls_ctx: TLS context data from tls_init()
477
* Returns: Bit field of supported TLS capabilities (TLS_CAPABILITY_*)
479
unsigned int tls_capabilities(void *tls_ctx);
482
* tls_connection_ia_send_phase_finished - Send a TLS/IA PhaseFinished message
483
* @tls_ctx: TLS context data from tls_init()
484
* @conn: Connection context data from tls_connection_init()
485
* @final: 1 = FinalPhaseFinished, 0 = IntermediatePhaseFinished
486
* @out_data: Pointer to output buffer (encrypted TLS/IA data)
487
* @out_len: Maximum out_data length
488
* Returns: Number of bytes written to out_data on success, -1 on failure
490
* This function is used to send the TLS/IA end phase message, e.g., when the
491
* EAP server completes EAP-TTLSv1.
493
int tls_connection_ia_send_phase_finished(void *tls_ctx,
494
struct tls_connection *conn,
496
u8 *out_data, size_t out_len);
499
* tls_connection_ia_final_phase_finished - Has final phase been completed
500
* @tls_ctx: TLS context data from tls_init()
501
* @conn: Connection context data from tls_connection_init()
502
* Returns: 1 if valid FinalPhaseFinished has been received, 0 if not, or -1
505
int tls_connection_ia_final_phase_finished(void *tls_ctx,
506
struct tls_connection *conn);
509
* tls_connection_ia_permute_inner_secret - Permute TLS/IA inner secret
510
* @tls_ctx: TLS context data from tls_init()
511
* @conn: Connection context data from tls_connection_init()
512
* @key: Session key material (session_key vectors with 2-octet length), or
513
* %NULL if no session key was generating in the current phase
514
* @key_len: Length of session key material
515
* Returns: 0 on success, -1 on failure
517
int tls_connection_ia_permute_inner_secret(void *tls_ctx,
518
struct tls_connection *conn,
519
const u8 *key, size_t key_len);
added
removed
src/crypto/tls.h
