6 SSL - OpenSSL SSL/TLS library
12 The OpenSSL B<ssl> library implements the Secure Sockets Layer (SSL v2/v3) and
13 Transport Layer Security (TLS v1) protocols. It provides a rich API which is
16 At first the library must be initialized; see
17 L<SSL_library_init(3)>.
19 Then an B<SSL_CTX> object is created as a framework to establish
20 TLS/SSL enabled connections (see L<SSL_CTX_new(3)>).
21 Various options regarding certificates, algorithms etc. can be set
24 When a network connection has been created, it can be assigned to an
25 B<SSL> object. After the B<SSL> object has been created using
26 L<SSL_new(3)>, L<SSL_set_fd(3)> or
27 L<SSL_set_bio(3)> can be used to associate the network
28 connection with the object.
30 Then the TLS/SSL handshake is performed using
31 L<SSL_accept(3)> or L<SSL_connect(3)>
33 L<SSL_read(3)> and L<SSL_write(3)> are used
34 to read and write data on the TLS/SSL connection.
35 L<SSL_shutdown(3)> can be used to shut down the
38 =head1 DATA STRUCTURES
40 Currently the OpenSSL B<ssl> library functions deals with the following data
45 =item B<SSL_METHOD> (SSL Method)
47 That's a dispatch structure describing the internal B<ssl> library
48 methods/functions which implement the various protocol versions (SSLv3
49 TLSv1, ...). It's needed to create an B<SSL_CTX>.
51 =item B<SSL_CIPHER> (SSL Cipher)
53 This structure holds the algorithm information for a particular cipher which
54 are a core part of the SSL/TLS protocol. The available ciphers are configured
55 on a B<SSL_CTX> basis and the actually used ones are then part of the
58 =item B<SSL_CTX> (SSL Context)
60 That's the global context structure which is created by a server or client
61 once per program life-time and which holds mainly default values for the
62 B<SSL> structures which are later created for the connections.
64 =item B<SSL_SESSION> (SSL Session)
66 This is a structure containing the current TLS/SSL session details for a
67 connection: B<SSL_CIPHER>s, client and server certificates, keys, etc.
69 =item B<SSL> (SSL Connection)
71 That's the main SSL/TLS structure which is created by a server or client per
72 established connection. This actually is the core structure in the SSL API.
73 Under run-time the application usually deals with this structure which has
74 links to mostly all other structures.
81 Currently the OpenSSL B<ssl> library provides the following C header files
82 containing the prototypes for the data structures and and functions:
88 That's the common header file for the SSL/TLS API. Include it into your
89 program to make the API of the B<ssl> library available. It internally
90 includes both more private SSL headers and headers from the B<crypto> library.
91 Whenever you need hard-core details on the internals of the SSL API, look
92 inside this header file.
96 Unused. Present for backwards compatibility only.
100 That's the sub header file dealing with the SSLv3 protocol only.
101 I<Usually you don't have to include it explicitly because
102 it's already included by ssl.h>.
106 That's the sub header file dealing with the TLSv1 protocol only.
107 I<Usually you don't have to include it explicitly because
108 it's already included by ssl.h>.
114 Currently the OpenSSL B<ssl> library exports 214 API functions.
115 They are documented in the following:
117 =head2 DEALING WITH PROTOCOL METHODS
119 Here we document the various API functions which deal with the SSL/TLS
120 protocol methods defined in B<SSL_METHOD> structures.
124 =item const SSL_METHOD *B<SSLv3_client_method>(void);
126 Constructor for the SSLv3 SSL_METHOD structure for a dedicated client.
128 =item const SSL_METHOD *B<SSLv3_server_method>(void);
130 Constructor for the SSLv3 SSL_METHOD structure for a dedicated server.
132 =item const SSL_METHOD *B<SSLv3_method>(void);
134 Constructor for the SSLv3 SSL_METHOD structure for combined client and server.
136 =item const SSL_METHOD *B<TLSv1_client_method>(void);
138 Constructor for the TLSv1 SSL_METHOD structure for a dedicated client.
140 =item const SSL_METHOD *B<TLSv1_server_method>(void);
142 Constructor for the TLSv1 SSL_METHOD structure for a dedicated server.
144 =item const SSL_METHOD *B<TLSv1_method>(void);
146 Constructor for the TLSv1 SSL_METHOD structure for combined client and server.
150 =head2 DEALING WITH CIPHERS
152 Here we document the various API functions which deal with the SSL/TLS
153 ciphers defined in B<SSL_CIPHER> structures.
157 =item char *B<SSL_CIPHER_description>(SSL_CIPHER *cipher, char *buf, int len);
159 Write a string to I<buf> (with a maximum size of I<len>) containing a human
160 readable description of I<cipher>. Returns I<buf>.
162 =item int B<SSL_CIPHER_get_bits>(SSL_CIPHER *cipher, int *alg_bits);
164 Determine the number of bits in I<cipher>. Because of export crippled ciphers
165 there are two bits: The bits the algorithm supports in general (stored to
166 I<alg_bits>) and the bits which are actually used (the return value).
168 =item const char *B<SSL_CIPHER_get_name>(SSL_CIPHER *cipher);
170 Return the internal name of I<cipher> as a string. These are the various
171 strings defined by the I<SSL3_TXT_xxx> and I<TLS1_TXT_xxx>
172 definitions in the header files.
174 =item char *B<SSL_CIPHER_get_version>(SSL_CIPHER *cipher);
176 Returns a string like "C<SSLv3>" or "C<TLSv1.2>" which indicates the
177 SSL/TLS protocol version to which I<cipher> belongs (i.e. where it was defined
178 in the specification the first time).
182 =head2 DEALING WITH PROTOCOL CONTEXTS
184 Here we document the various API functions which deal with the SSL/TLS
185 protocol context defined in the B<SSL_CTX> structure.
189 =item int B<SSL_CTX_add_client_CA>(SSL_CTX *ctx, X509 *x);
191 =item long B<SSL_CTX_add_extra_chain_cert>(SSL_CTX *ctx, X509 *x509);
193 =item int B<SSL_CTX_add_session>(SSL_CTX *ctx, SSL_SESSION *c);
195 =item int B<SSL_CTX_check_private_key>(const SSL_CTX *ctx);
197 =item long B<SSL_CTX_ctrl>(SSL_CTX *ctx, int cmd, long larg, char *parg);
199 =item void B<SSL_CTX_flush_sessions>(SSL_CTX *s, long t);
201 =item void B<SSL_CTX_free>(SSL_CTX *a);
203 =item char *B<SSL_CTX_get_app_data>(SSL_CTX *ctx);
205 =item X509_STORE *B<SSL_CTX_get_cert_store>(SSL_CTX *ctx);
207 =item STACK *B<SSL_CTX_get_client_CA_list>(const SSL_CTX *ctx);
209 =item int (*B<SSL_CTX_get_client_cert_cb>(SSL_CTX *ctx))(SSL *ssl, X509 **x509, EVP_PKEY **pkey);
211 =item void B<SSL_CTX_get_default_read_ahead>(SSL_CTX *ctx);
213 =item char *B<SSL_CTX_get_ex_data>(const SSL_CTX *s, int idx);
215 =item int B<SSL_CTX_get_ex_new_index>(long argl, char *argp, int (*new_func);(void), int (*dup_func)(void), void (*free_func)(void))
217 =item void (*B<SSL_CTX_get_info_callback>(SSL_CTX *ctx))(SSL *ssl, int cb, int ret);
219 =item int B<SSL_CTX_get_quiet_shutdown>(const SSL_CTX *ctx);
221 =item void B<SSL_CTX_get_read_ahead>(SSL_CTX *ctx);
223 =item int B<SSL_CTX_get_session_cache_mode>(SSL_CTX *ctx);
225 =item long B<SSL_CTX_get_timeout>(const SSL_CTX *ctx);
227 =item int (*B<SSL_CTX_get_verify_callback>(const SSL_CTX *ctx))(int ok, X509_STORE_CTX *ctx);
229 =item int B<SSL_CTX_get_verify_mode>(SSL_CTX *ctx);
231 =item int B<SSL_CTX_load_verify_locations>(SSL_CTX *ctx, char *CAfile, char *CApath);
233 =item long B<SSL_CTX_need_tmp_RSA>(SSL_CTX *ctx);
235 =item SSL_CTX *B<SSL_CTX_new>(const SSL_METHOD *meth);
237 =item int B<SSL_CTX_remove_session>(SSL_CTX *ctx, SSL_SESSION *c);
239 =item int B<SSL_CTX_sess_accept>(SSL_CTX *ctx);
241 =item int B<SSL_CTX_sess_accept_good>(SSL_CTX *ctx);
243 =item int B<SSL_CTX_sess_accept_renegotiate>(SSL_CTX *ctx);
245 =item int B<SSL_CTX_sess_cache_full>(SSL_CTX *ctx);
247 =item int B<SSL_CTX_sess_cb_hits>(SSL_CTX *ctx);
249 =item int B<SSL_CTX_sess_connect>(SSL_CTX *ctx);
251 =item int B<SSL_CTX_sess_connect_good>(SSL_CTX *ctx);
253 =item int B<SSL_CTX_sess_connect_renegotiate>(SSL_CTX *ctx);
255 =item int B<SSL_CTX_sess_get_cache_size>(SSL_CTX *ctx);
257 =item SSL_SESSION *(*B<SSL_CTX_sess_get_get_cb>(SSL_CTX *ctx))(SSL *ssl, unsigned char *data, int len, int *copy);
259 =item int (*B<SSL_CTX_sess_get_new_cb>(SSL_CTX *ctx)(SSL *ssl, SSL_SESSION *sess);
261 =item void (*B<SSL_CTX_sess_get_remove_cb>(SSL_CTX *ctx)(SSL_CTX *ctx, SSL_SESSION *sess);
263 =item int B<SSL_CTX_sess_hits>(SSL_CTX *ctx);
265 =item int B<SSL_CTX_sess_misses>(SSL_CTX *ctx);
267 =item int B<SSL_CTX_sess_number>(SSL_CTX *ctx);
269 =item void B<SSL_CTX_sess_set_cache_size>(SSL_CTX *ctx,t);
271 =item void B<SSL_CTX_sess_set_get_cb>(SSL_CTX *ctx, SSL_SESSION *(*cb)(SSL *ssl, unsigned char *data, int len, int *copy));
273 =item void B<SSL_CTX_sess_set_new_cb>(SSL_CTX *ctx, int (*cb)(SSL *ssl, SSL_SESSION *sess));
275 =item void B<SSL_CTX_sess_set_remove_cb>(SSL_CTX *ctx, void (*cb)(SSL_CTX *ctx, SSL_SESSION *sess));
277 =item int B<SSL_CTX_sess_timeouts>(SSL_CTX *ctx);
279 =item LHASH *B<SSL_CTX_sessions>(SSL_CTX *ctx);
281 =item void B<SSL_CTX_set_app_data>(SSL_CTX *ctx, void *arg);
283 =item void B<SSL_CTX_set_cert_store>(SSL_CTX *ctx, X509_STORE *cs);
285 =item void B<SSL_CTX_set_cert_verify_cb>(SSL_CTX *ctx, int (*cb)(), char *arg)
287 =item int B<SSL_CTX_set_cipher_list>(SSL_CTX *ctx, char *str);
289 =item void B<SSL_CTX_set_client_CA_list>(SSL_CTX *ctx, STACK *list);
291 =item void B<SSL_CTX_set_client_cert_cb>(SSL_CTX *ctx, int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey));
293 =item void B<SSL_CTX_set_default_passwd_cb>(SSL_CTX *ctx, int (*cb);(void))
295 =item void B<SSL_CTX_set_default_read_ahead>(SSL_CTX *ctx, int m);
297 =item int B<SSL_CTX_set_default_verify_paths>(SSL_CTX *ctx);
299 Use the default paths to locate trusted CA certificates. There is one default
300 directory path and one default file path. Both are set via this call.
302 =item int B<SSL_CTX_set_default_verify_dir>(SSL_CTX *ctx)
304 Use the default directory path to locate trusted CA certficates.
306 =item int B<SSL_CTX_set_default_verify_file>(SSL_CTX *ctx)
308 Use the file path to locate trusted CA certficates.
310 =item int B<SSL_CTX_set_ex_data>(SSL_CTX *s, int idx, char *arg);
312 =item void B<SSL_CTX_set_info_callback>(SSL_CTX *ctx, void (*cb)(SSL *ssl, int cb, int ret));
314 =item void B<SSL_CTX_set_msg_callback>(SSL_CTX *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg));
316 =item void B<SSL_CTX_set_msg_callback_arg>(SSL_CTX *ctx, void *arg);
318 =item void B<SSL_CTX_set_options>(SSL_CTX *ctx, unsigned long op);
320 =item void B<SSL_CTX_set_quiet_shutdown>(SSL_CTX *ctx, int mode);
322 =item void B<SSL_CTX_set_read_ahead>(SSL_CTX *ctx, int m);
324 =item void B<SSL_CTX_set_session_cache_mode>(SSL_CTX *ctx, int mode);
326 =item int B<SSL_CTX_set_ssl_version>(SSL_CTX *ctx, const SSL_METHOD *meth);
328 =item void B<SSL_CTX_set_timeout>(SSL_CTX *ctx, long t);
330 =item long B<SSL_CTX_set_tmp_dh>(SSL_CTX* ctx, DH *dh);
332 =item long B<SSL_CTX_set_tmp_dh_callback>(SSL_CTX *ctx, DH *(*cb)(void));
334 =item void B<SSL_CTX_set_verify>(SSL_CTX *ctx, int mode, int (*cb);(void))
336 =item int B<SSL_CTX_use_PrivateKey>(SSL_CTX *ctx, EVP_PKEY *pkey);
338 =item int B<SSL_CTX_use_PrivateKey_ASN1>(int type, SSL_CTX *ctx, unsigned char *d, long len);
340 =item int B<SSL_CTX_use_PrivateKey_file>(SSL_CTX *ctx, char *file, int type);
342 =item int B<SSL_CTX_use_RSAPrivateKey>(SSL_CTX *ctx, RSA *rsa);
344 =item int B<SSL_CTX_use_RSAPrivateKey_ASN1>(SSL_CTX *ctx, unsigned char *d, long len);
346 =item int B<SSL_CTX_use_RSAPrivateKey_file>(SSL_CTX *ctx, char *file, int type);
348 =item int B<SSL_CTX_use_certificate>(SSL_CTX *ctx, X509 *x);
350 =item int B<SSL_CTX_use_certificate_ASN1>(SSL_CTX *ctx, int len, unsigned char *d);
352 =item int B<SSL_CTX_use_certificate_file>(SSL_CTX *ctx, char *file, int type);
354 =item X509 *B<SSL_CTX_get0_certificate>(const SSL_CTX *ctx);
356 =item EVP_PKEY *B<SSL_CTX_get0_privatekey>(const SSL_CTX *ctx);
358 =item void B<SSL_CTX_set_psk_client_callback>(SSL_CTX *ctx, unsigned int (*callback)(SSL *ssl, const char *hint, char *identity, unsigned int max_identity_len, unsigned char *psk, unsigned int max_psk_len));
360 =item int B<SSL_CTX_use_psk_identity_hint>(SSL_CTX *ctx, const char *hint);
362 =item void B<SSL_CTX_set_psk_server_callback>(SSL_CTX *ctx, unsigned int (*callback)(SSL *ssl, const char *identity, unsigned char *psk, int max_psk_len));
369 =head2 DEALING WITH SESSIONS
371 Here we document the various API functions which deal with the SSL/TLS
372 sessions defined in the B<SSL_SESSION> structures.
376 =item int B<SSL_SESSION_cmp>(const SSL_SESSION *a, const SSL_SESSION *b);
378 =item void B<SSL_SESSION_free>(SSL_SESSION *ss);
380 =item char *B<SSL_SESSION_get_app_data>(SSL_SESSION *s);
382 =item char *B<SSL_SESSION_get_ex_data>(const SSL_SESSION *s, int idx);
384 =item int B<SSL_SESSION_get_ex_new_index>(long argl, char *argp, int (*new_func);(void), int (*dup_func)(void), void (*free_func)(void))
386 =item long B<SSL_SESSION_get_time>(const SSL_SESSION *s);
388 =item long B<SSL_SESSION_get_timeout>(const SSL_SESSION *s);
390 =item unsigned long B<SSL_SESSION_hash>(const SSL_SESSION *a);
392 =item SSL_SESSION *B<SSL_SESSION_new>(void);
394 =item int B<SSL_SESSION_print>(BIO *bp, const SSL_SESSION *x);
396 =item int B<SSL_SESSION_print_fp>(FILE *fp, const SSL_SESSION *x);
398 =item void B<SSL_SESSION_set_app_data>(SSL_SESSION *s, char *a);
400 =item int B<SSL_SESSION_set_ex_data>(SSL_SESSION *s, int idx, char *arg);
402 =item long B<SSL_SESSION_set_time>(SSL_SESSION *s, long t);
404 =item long B<SSL_SESSION_set_timeout>(SSL_SESSION *s, long t);
408 =head2 DEALING WITH CONNECTIONS
410 Here we document the various API functions which deal with the SSL/TLS
411 connection defined in the B<SSL> structure.
415 =item int B<SSL_accept>(SSL *ssl);
417 =item int B<SSL_add_dir_cert_subjects_to_stack>(STACK *stack, const char *dir);
419 =item int B<SSL_add_file_cert_subjects_to_stack>(STACK *stack, const char *file);
421 =item int B<SSL_add_client_CA>(SSL *ssl, X509 *x);
423 =item char *B<SSL_alert_desc_string>(int value);
425 =item char *B<SSL_alert_desc_string_long>(int value);
427 =item char *B<SSL_alert_type_string>(int value);
429 =item char *B<SSL_alert_type_string_long>(int value);
431 =item int B<SSL_check_private_key>(const SSL *ssl);
433 =item void B<SSL_clear>(SSL *ssl);
435 =item long B<SSL_clear_num_renegotiations>(SSL *ssl);
437 =item int B<SSL_connect>(SSL *ssl);
439 =item int B<SSL_copy_session_id>(SSL *t, const SSL *f);
441 Sets the session details for B<t> to be the same as in B<f>. Returns 1 on
442 success or 0 on failure.
444 =item long B<SSL_ctrl>(SSL *ssl, int cmd, long larg, char *parg);
446 =item int B<SSL_do_handshake>(SSL *ssl);
448 =item SSL *B<SSL_dup>(SSL *ssl);
450 SSL_dup() allows applications to configure an SSL handle for use
451 in multiple SSL connections, and then duplicate it prior to initiating
452 each connection with the duplicated handle.
453 Use of SSL_dup() avoids the need to repeat the configuration of the
454 handles for each connection.
455 This is used internally by L<BIO_s_accept(3)> to construct
456 per-connection SSL handles after L<accept(2)>.
458 For SSL_dup() to work, the connection MUST be in its initial state
459 and MUST NOT have not yet have started the SSL handshake.
460 For connections that are not in their initial state SSL_dup() just
461 increments an internal reference count and returns the I<same>
463 It may be possible to use L<SSL_clear(3)> to recycle an SSL handle
464 that is not in its initial state for re-use, but this is best
466 Instead, save and restore the session, if desired, and construct a
467 fresh handle for each connection.
469 =item STACK *B<SSL_dup_CA_list>(STACK *sk);
471 =item void B<SSL_free>(SSL *ssl);
473 =item SSL_CTX *B<SSL_get_SSL_CTX>(const SSL *ssl);
475 =item char *B<SSL_get_app_data>(SSL *ssl);
477 =item X509 *B<SSL_get_certificate>(const SSL *ssl);
479 =item const char *B<SSL_get_cipher>(const SSL *ssl);
481 =item int B<SSL_get_cipher_bits>(const SSL *ssl, int *alg_bits);
483 =item char *B<SSL_get_cipher_list>(const SSL *ssl, int n);
485 =item char *B<SSL_get_cipher_name>(const SSL *ssl);
487 =item char *B<SSL_get_cipher_version>(const SSL *ssl);
489 =item STACK *B<SSL_get_ciphers>(const SSL *ssl);
491 =item STACK *B<SSL_get_client_CA_list>(const SSL *ssl);
493 =item SSL_CIPHER *B<SSL_get_current_cipher>(SSL *ssl);
495 =item long B<SSL_get_default_timeout>(const SSL *ssl);
497 =item int B<SSL_get_error>(const SSL *ssl, int i);
499 =item char *B<SSL_get_ex_data>(const SSL *ssl, int idx);
501 =item int B<SSL_get_ex_data_X509_STORE_CTX_idx>(void);
503 =item int B<SSL_get_ex_new_index>(long argl, char *argp, int (*new_func);(void), int (*dup_func)(void), void (*free_func)(void))
505 =item int B<SSL_get_fd>(const SSL *ssl);
507 =item void (*B<SSL_get_info_callback>(const SSL *ssl);)()
509 =item STACK *B<SSL_get_peer_cert_chain>(const SSL *ssl);
511 =item X509 *B<SSL_get_peer_certificate>(const SSL *ssl);
513 =item EVP_PKEY *B<SSL_get_privatekey>(const SSL *ssl);
515 =item int B<SSL_get_quiet_shutdown>(const SSL *ssl);
517 =item BIO *B<SSL_get_rbio>(const SSL *ssl);
519 =item int B<SSL_get_read_ahead>(const SSL *ssl);
521 =item SSL_SESSION *B<SSL_get_session>(const SSL *ssl);
523 =item char *B<SSL_get_shared_ciphers>(const SSL *ssl, char *buf, int len);
525 =item int B<SSL_get_shutdown>(const SSL *ssl);
527 =item const SSL_METHOD *B<SSL_get_ssl_method>(SSL *ssl);
529 =item int B<SSL_get_state>(const SSL *ssl);
531 =item long B<SSL_get_time>(const SSL *ssl);
533 =item long B<SSL_get_timeout>(const SSL *ssl);
535 =item int (*B<SSL_get_verify_callback>(const SSL *ssl))(int,X509_STORE_CTX *)
537 =item int B<SSL_get_verify_mode>(const SSL *ssl);
539 =item long B<SSL_get_verify_result>(const SSL *ssl);
541 =item char *B<SSL_get_version>(const SSL *ssl);
543 =item BIO *B<SSL_get_wbio>(const SSL *ssl);
545 =item int B<SSL_in_accept_init>(SSL *ssl);
547 =item int B<SSL_in_before>(SSL *ssl);
549 =item int B<SSL_in_connect_init>(SSL *ssl);
551 =item int B<SSL_in_init>(SSL *ssl);
553 =item int B<SSL_is_init_finished>(SSL *ssl);
555 =item STACK *B<SSL_load_client_CA_file>(char *file);
557 =item void B<SSL_load_error_strings>(void);
559 =item SSL *B<SSL_new>(SSL_CTX *ctx);
561 =item long B<SSL_num_renegotiations>(SSL *ssl);
563 =item int B<SSL_peek>(SSL *ssl, void *buf, int num);
565 =item int B<SSL_pending>(const SSL *ssl);
567 =item int B<SSL_read>(SSL *ssl, void *buf, int num);
569 =item int B<SSL_renegotiate>(SSL *ssl);
571 =item char *B<SSL_rstate_string>(SSL *ssl);
573 =item char *B<SSL_rstate_string_long>(SSL *ssl);
575 =item long B<SSL_session_reused>(SSL *ssl);
577 =item void B<SSL_set_accept_state>(SSL *ssl);
579 =item void B<SSL_set_app_data>(SSL *ssl, char *arg);
581 =item void B<SSL_set_bio>(SSL *ssl, BIO *rbio, BIO *wbio);
583 =item int B<SSL_set_cipher_list>(SSL *ssl, char *str);
585 =item void B<SSL_set_client_CA_list>(SSL *ssl, STACK *list);
587 =item void B<SSL_set_connect_state>(SSL *ssl);
589 =item int B<SSL_set_ex_data>(SSL *ssl, int idx, char *arg);
591 =item int B<SSL_set_fd>(SSL *ssl, int fd);
593 =item void B<SSL_set_info_callback>(SSL *ssl, void (*cb);(void))
595 =item void B<SSL_set_msg_callback>(SSL *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg));
597 =item void B<SSL_set_msg_callback_arg>(SSL *ctx, void *arg);
599 =item void B<SSL_set_options>(SSL *ssl, unsigned long op);
601 =item void B<SSL_set_quiet_shutdown>(SSL *ssl, int mode);
603 =item void B<SSL_set_read_ahead>(SSL *ssl, int yes);
605 =item int B<SSL_set_rfd>(SSL *ssl, int fd);
607 =item int B<SSL_set_session>(SSL *ssl, SSL_SESSION *session);
609 =item void B<SSL_set_shutdown>(SSL *ssl, int mode);
611 =item int B<SSL_set_ssl_method>(SSL *ssl, const SSL_METHOD *meth);
613 =item void B<SSL_set_time>(SSL *ssl, long t);
615 =item void B<SSL_set_timeout>(SSL *ssl, long t);
617 =item void B<SSL_set_verify>(SSL *ssl, int mode, int (*callback);(void))
619 =item void B<SSL_set_verify_result>(SSL *ssl, long arg);
621 =item int B<SSL_set_wfd>(SSL *ssl, int fd);
623 =item int B<SSL_shutdown>(SSL *ssl);
625 =item OSSL_HANDSHAKE_STATE B<SSL_get_state>(const SSL *ssl);
627 Returns the current handshake state.
629 =item char *B<SSL_state_string>(const SSL *ssl);
631 =item char *B<SSL_state_string_long>(const SSL *ssl);
633 =item long B<SSL_total_renegotiations>(SSL *ssl);
635 =item int B<SSL_use_PrivateKey>(SSL *ssl, EVP_PKEY *pkey);
637 =item int B<SSL_use_PrivateKey_ASN1>(int type, SSL *ssl, unsigned char *d, long len);
639 =item int B<SSL_use_PrivateKey_file>(SSL *ssl, char *file, int type);
641 =item int B<SSL_use_RSAPrivateKey>(SSL *ssl, RSA *rsa);
643 =item int B<SSL_use_RSAPrivateKey_ASN1>(SSL *ssl, unsigned char *d, long len);
645 =item int B<SSL_use_RSAPrivateKey_file>(SSL *ssl, char *file, int type);
647 =item int B<SSL_use_certificate>(SSL *ssl, X509 *x);
649 =item int B<SSL_use_certificate_ASN1>(SSL *ssl, int len, unsigned char *d);
651 =item int B<SSL_use_certificate_file>(SSL *ssl, char *file, int type);
653 =item int B<SSL_version>(const SSL *ssl);
655 =item int B<SSL_want>(const SSL *ssl);
657 =item int B<SSL_want_nothing>(const SSL *ssl);
659 =item int B<SSL_want_read>(const SSL *ssl);
661 =item int B<SSL_want_write>(const SSL *ssl);
663 =item int B<SSL_want_x509_lookup>(const SSL *ssl);
665 =item int B<SSL_write>(SSL *ssl, const void *buf, int num);
667 =item void B<SSL_set_psk_client_callback>(SSL *ssl, unsigned int (*callback)(SSL *ssl, const char *hint, char *identity, unsigned int max_identity_len, unsigned char *psk, unsigned int max_psk_len));
669 =item int B<SSL_use_psk_identity_hint>(SSL *ssl, const char *hint);
671 =item void B<SSL_set_psk_server_callback>(SSL *ssl, unsigned int (*callback)(SSL *ssl, const char *identity, unsigned char *psk, int max_psk_len));
673 =item const char *B<SSL_get_psk_identity_hint>(SSL *ssl);
675 =item const char *B<SSL_get_psk_identity>(SSL *ssl);
681 L<openssl(1)>, L<crypto(3)>,
682 L<CRYPTO_get_ex_new_index(3)>,
683 L<SSL_accept(3)>, L<SSL_clear(3)>,
685 L<SSL_CIPHER_get_name(3)>,
686 L<SSL_COMP_add_compression_method(3)>,
687 L<SSL_CTX_add_extra_chain_cert(3)>,
688 L<SSL_CTX_add_session(3)>,
690 L<SSL_CTX_flush_sessions(3)>,
691 L<SSL_CTX_get_verify_mode(3)>,
692 L<SSL_CTX_load_verify_locations(3)>
694 L<SSL_CTX_sess_number(3)>,
695 L<SSL_CTX_sess_set_cache_size(3)>,
696 L<SSL_CTX_sess_set_get_cb(3)>,
697 L<SSL_CTX_sessions(3)>,
698 L<SSL_CTX_set_cert_store(3)>,
699 L<SSL_CTX_set_cert_verify_callback(3)>,
700 L<SSL_CTX_set_cipher_list(3)>,
701 L<SSL_CTX_set_client_CA_list(3)>,
702 L<SSL_CTX_set_client_cert_cb(3)>,
703 L<SSL_CTX_set_default_passwd_cb(3)>,
704 L<SSL_CTX_set_generate_session_id(3)>,
705 L<SSL_CTX_set_info_callback(3)>,
706 L<SSL_CTX_set_max_cert_list(3)>,
707 L<SSL_CTX_set_mode(3)>,
708 L<SSL_CTX_set_msg_callback(3)>,
709 L<SSL_CTX_set_options(3)>,
710 L<SSL_CTX_set_quiet_shutdown(3)>,
711 L<SSL_CTX_set_read_ahead(3)>,
712 L<SSL_CTX_set_session_cache_mode(3)>,
713 L<SSL_CTX_set_session_id_context(3)>,
714 L<SSL_CTX_set_ssl_version(3)>,
715 L<SSL_CTX_set_timeout(3)>,
716 L<SSL_CTX_set_tmp_dh_callback(3)>,
717 L<SSL_CTX_set_verify(3)>,
718 L<SSL_CTX_use_certificate(3)>,
719 L<SSL_alert_type_string(3)>,
720 L<SSL_do_handshake(3)>,
721 L<SSL_get_SSL_CTX(3)>,
722 L<SSL_get_ciphers(3)>,
723 L<SSL_get_client_CA_list(3)>,
724 L<SSL_get_default_timeout(3)>,
726 L<SSL_get_ex_data_X509_STORE_CTX_idx(3)>,
728 L<SSL_get_peer_cert_chain(3)>,
730 L<SSL_get_session(3)>,
731 L<SSL_get_verify_result(3)>,
732 L<SSL_get_version(3)>,
733 L<SSL_library_init(3)>,
734 L<SSL_load_client_CA_file(3)>,
738 L<SSL_rstate_string(3)>,
739 L<SSL_session_reused(3)>,
741 L<SSL_set_connect_state(3)>,
743 L<SSL_set_session(3)>,
744 L<SSL_set_shutdown(3)>,
746 L<SSL_state_string(3)>,
749 L<SSL_SESSION_free(3)>,
750 L<SSL_SESSION_get_time(3)>,
751 L<d2i_SSL_SESSION(3)>,
752 L<SSL_CTX_set_psk_client_callback(3)>,
753 L<SSL_CTX_use_psk_identity_hint(3)>,
754 L<SSL_get_psk_identity(3)>,
759 B<SSLv2_client_method>, B<SSLv2_server_method> and B<SSLv2_method> where removed
762 The return type of B<SSL_copy_session_id> was changed from void to int in