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)|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)|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)|SSL_new(3)>, L<SSL_set_fd(3)|SSL_set_fd(3)> or
27 L<SSL_set_bio(3)|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)|SSL_accept(3)> or L<SSL_connect(3)|SSL_connect(3)>
33 L<SSL_read(3)|SSL_read(3)> and L<SSL_write(3)|SSL_write(3)> are used
34 to read and write data on the TLS/SSL connection.
35 L<SSL_shutdown(3)|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 (SSLv1, SSLv2
49 and 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 That's the sub header file dealing with the SSLv2 protocol only.
97 I<Usually you don't have to include it explicitly because
98 it's already included by ssl.h>.
102 That's the sub header file dealing with the SSLv3 protocol only.
103 I<Usually you don't have to include it explicitly because
104 it's already included by ssl.h>.
108 That's the sub header file dealing with the combined use of the SSLv2 and
110 I<Usually you don't have to include it explicitly because
111 it's already included by ssl.h>.
115 That's the sub header file dealing with the TLSv1 protocol only.
116 I<Usually you don't have to include it explicitly because
117 it's already included by ssl.h>.
123 Currently the OpenSSL B<ssl> library exports 214 API functions.
124 They are documented in the following:
126 =head2 DEALING WITH PROTOCOL METHODS
128 Here we document the various API functions which deal with the SSL/TLS
129 protocol methods defined in B<SSL_METHOD> structures.
133 =item const SSL_METHOD *B<SSLv2_client_method>(void);
135 Constructor for the SSLv2 SSL_METHOD structure for a dedicated client.
137 =item const SSL_METHOD *B<SSLv2_server_method>(void);
139 Constructor for the SSLv2 SSL_METHOD structure for a dedicated server.
141 =item const SSL_METHOD *B<SSLv2_method>(void);
143 Constructor for the SSLv2 SSL_METHOD structure for combined client and server.
145 =item const SSL_METHOD *B<SSLv3_client_method>(void);
147 Constructor for the SSLv3 SSL_METHOD structure for a dedicated client.
149 =item const SSL_METHOD *B<SSLv3_server_method>(void);
151 Constructor for the SSLv3 SSL_METHOD structure for a dedicated server.
153 =item const SSL_METHOD *B<SSLv3_method>(void);
155 Constructor for the SSLv3 SSL_METHOD structure for combined client and server.
157 =item const SSL_METHOD *B<TLSv1_client_method>(void);
159 Constructor for the TLSv1 SSL_METHOD structure for a dedicated client.
161 =item const SSL_METHOD *B<TLSv1_server_method>(void);
163 Constructor for the TLSv1 SSL_METHOD structure for a dedicated server.
165 =item const SSL_METHOD *B<TLSv1_method>(void);
167 Constructor for the TLSv1 SSL_METHOD structure for combined client and server.
171 =head2 DEALING WITH CIPHERS
173 Here we document the various API functions which deal with the SSL/TLS
174 ciphers defined in B<SSL_CIPHER> structures.
178 =item char *B<SSL_CIPHER_description>(SSL_CIPHER *cipher, char *buf, int len);
180 Write a string to I<buf> (with a maximum size of I<len>) containing a human
181 readable description of I<cipher>. Returns I<buf>.
183 =item int B<SSL_CIPHER_get_bits>(SSL_CIPHER *cipher, int *alg_bits);
185 Determine the number of bits in I<cipher>. Because of export crippled ciphers
186 there are two bits: The bits the algorithm supports in general (stored to
187 I<alg_bits>) and the bits which are actually used (the return value).
189 =item const char *B<SSL_CIPHER_get_name>(SSL_CIPHER *cipher);
191 Return the internal name of I<cipher> as a string. These are the various
192 strings defined by the I<SSL2_TXT_xxx>, I<SSL3_TXT_xxx> and I<TLS1_TXT_xxx>
193 definitions in the header files.
195 =item char *B<SSL_CIPHER_get_version>(SSL_CIPHER *cipher);
197 Returns a string like "C<TLSv1/SSLv3>" or "C<SSLv2>" which indicates the
198 SSL/TLS protocol version to which I<cipher> belongs (i.e. where it was defined
199 in the specification the first time).
203 =head2 DEALING WITH PROTOCOL CONTEXTS
205 Here we document the various API functions which deal with the SSL/TLS
206 protocol context defined in the B<SSL_CTX> structure.
210 =item int B<SSL_CTX_add_client_CA>(SSL_CTX *ctx, X509 *x);
212 =item long B<SSL_CTX_add_extra_chain_cert>(SSL_CTX *ctx, X509 *x509);
214 =item int B<SSL_CTX_add_session>(SSL_CTX *ctx, SSL_SESSION *c);
216 =item int B<SSL_CTX_check_private_key>(const SSL_CTX *ctx);
218 =item long B<SSL_CTX_ctrl>(SSL_CTX *ctx, int cmd, long larg, char *parg);
220 =item void B<SSL_CTX_flush_sessions>(SSL_CTX *s, long t);
222 =item void B<SSL_CTX_free>(SSL_CTX *a);
224 =item char *B<SSL_CTX_get_app_data>(SSL_CTX *ctx);
226 =item X509_STORE *B<SSL_CTX_get_cert_store>(SSL_CTX *ctx);
228 =item STACK *B<SSL_CTX_get_client_CA_list>(const SSL_CTX *ctx);
230 =item int (*B<SSL_CTX_get_client_cert_cb>(SSL_CTX *ctx))(SSL *ssl, X509 **x509, EVP_PKEY **pkey);
232 =item char *B<SSL_CTX_get_ex_data>(const SSL_CTX *s, int idx);
234 =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))
236 =item void (*B<SSL_CTX_get_info_callback>(SSL_CTX *ctx))(SSL *ssl, int cb, int ret);
238 =item int B<SSL_CTX_get_quiet_shutdown>(const SSL_CTX *ctx);
240 =item int B<SSL_CTX_get_session_cache_mode>(SSL_CTX *ctx);
242 =item long B<SSL_CTX_get_timeout>(const SSL_CTX *ctx);
244 =item int (*B<SSL_CTX_get_verify_callback>(const SSL_CTX *ctx))(int ok, X509_STORE_CTX *ctx);
246 =item int B<SSL_CTX_get_verify_mode>(SSL_CTX *ctx);
248 =item int B<SSL_CTX_load_verify_locations>(SSL_CTX *ctx, char *CAfile, char *CApath);
250 =item long B<SSL_CTX_need_tmp_RSA>(SSL_CTX *ctx);
252 =item SSL_CTX *B<SSL_CTX_new>(const SSL_METHOD *meth);
254 =item int B<SSL_CTX_remove_session>(SSL_CTX *ctx, SSL_SESSION *c);
256 =item int B<SSL_CTX_sess_accept>(SSL_CTX *ctx);
258 =item int B<SSL_CTX_sess_accept_good>(SSL_CTX *ctx);
260 =item int B<SSL_CTX_sess_accept_renegotiate>(SSL_CTX *ctx);
262 =item int B<SSL_CTX_sess_cache_full>(SSL_CTX *ctx);
264 =item int B<SSL_CTX_sess_cb_hits>(SSL_CTX *ctx);
266 =item int B<SSL_CTX_sess_connect>(SSL_CTX *ctx);
268 =item int B<SSL_CTX_sess_connect_good>(SSL_CTX *ctx);
270 =item int B<SSL_CTX_sess_connect_renegotiate>(SSL_CTX *ctx);
272 =item int B<SSL_CTX_sess_get_cache_size>(SSL_CTX *ctx);
274 =item SSL_SESSION *(*B<SSL_CTX_sess_get_get_cb>(SSL_CTX *ctx))(SSL *ssl, unsigned char *data, int len, int *copy);
276 =item int (*B<SSL_CTX_sess_get_new_cb>(SSL_CTX *ctx)(SSL *ssl, SSL_SESSION *sess);
278 =item void (*B<SSL_CTX_sess_get_remove_cb>(SSL_CTX *ctx)(SSL_CTX *ctx, SSL_SESSION *sess);
280 =item int B<SSL_CTX_sess_hits>(SSL_CTX *ctx);
282 =item int B<SSL_CTX_sess_misses>(SSL_CTX *ctx);
284 =item int B<SSL_CTX_sess_number>(SSL_CTX *ctx);
286 =item void B<SSL_CTX_sess_set_cache_size>(SSL_CTX *ctx,t);
288 =item void B<SSL_CTX_sess_set_get_cb>(SSL_CTX *ctx, SSL_SESSION *(*cb)(SSL *ssl, unsigned char *data, int len, int *copy));
290 =item void B<SSL_CTX_sess_set_new_cb>(SSL_CTX *ctx, int (*cb)(SSL *ssl, SSL_SESSION *sess));
292 =item void B<SSL_CTX_sess_set_remove_cb>(SSL_CTX *ctx, void (*cb)(SSL_CTX *ctx, SSL_SESSION *sess));
294 =item int B<SSL_CTX_sess_timeouts>(SSL_CTX *ctx);
296 =item LHASH *B<SSL_CTX_sessions>(SSL_CTX *ctx);
298 =item void B<SSL_CTX_set_app_data>(SSL_CTX *ctx, void *arg);
300 =item void B<SSL_CTX_set_cert_store>(SSL_CTX *ctx, X509_STORE *cs);
302 =item void B<SSL_CTX_set_cert_verify_cb>(SSL_CTX *ctx, int (*cb)(), char *arg)
304 =item int B<SSL_CTX_set_cipher_list>(SSL_CTX *ctx, char *str);
306 =item void B<SSL_CTX_set_client_CA_list>(SSL_CTX *ctx, STACK *list);
308 =item void B<SSL_CTX_set_client_cert_cb>(SSL_CTX *ctx, int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey));
310 =item void B<SSL_CTX_set_default_passwd_cb>(SSL_CTX *ctx, int (*cb);(void))
312 =item void B<SSL_CTX_set_default_read_ahead>(SSL_CTX *ctx, int m);
314 =item int B<SSL_CTX_set_default_verify_paths>(SSL_CTX *ctx);
316 =item int B<SSL_CTX_set_ex_data>(SSL_CTX *s, int idx, char *arg);
318 =item void B<SSL_CTX_set_info_callback>(SSL_CTX *ctx, void (*cb)(SSL *ssl, int cb, int ret));
320 =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));
322 =item void B<SSL_CTX_set_msg_callback_arg>(SSL_CTX *ctx, void *arg);
324 =item void B<SSL_CTX_set_options>(SSL_CTX *ctx, unsigned long op);
326 =item void B<SSL_CTX_set_quiet_shutdown>(SSL_CTX *ctx, int mode);
328 =item void B<SSL_CTX_set_session_cache_mode>(SSL_CTX *ctx, int mode);
330 =item int B<SSL_CTX_set_ssl_version>(SSL_CTX *ctx, const SSL_METHOD *meth);
332 =item void B<SSL_CTX_set_timeout>(SSL_CTX *ctx, long t);
334 =item long B<SSL_CTX_set_tmp_dh>(SSL_CTX* ctx, DH *dh);
336 =item long B<SSL_CTX_set_tmp_dh_callback>(SSL_CTX *ctx, DH *(*cb)(void));
338 =item long B<SSL_CTX_set_tmp_rsa>(SSL_CTX *ctx, RSA *rsa);
340 =item SSL_CTX_set_tmp_rsa_callback
342 C<long B<SSL_CTX_set_tmp_rsa_callback>(SSL_CTX *B<ctx>, RSA *(*B<cb>)(SSL *B<ssl>, int B<export>, int B<keylength>));>
344 Sets the callback which will be called when a temporary private key is
345 required. The B<C<export>> flag will be set if the reason for needing
346 a temp key is that an export ciphersuite is in use, in which case,
347 B<C<keylength>> will contain the required keylength in bits. Generate a key of
348 appropriate size (using ???) and return it.
350 =item SSL_set_tmp_rsa_callback
352 long B<SSL_set_tmp_rsa_callback>(SSL *ssl, RSA *(*cb)(SSL *ssl, int export, int keylength));
354 The same as B<SSL_CTX_set_tmp_rsa_callback>, except it operates on an SSL
355 session instead of a context.
357 =item void B<SSL_CTX_set_verify>(SSL_CTX *ctx, int mode, int (*cb);(void))
359 =item int B<SSL_CTX_use_PrivateKey>(SSL_CTX *ctx, EVP_PKEY *pkey);
361 =item int B<SSL_CTX_use_PrivateKey_ASN1>(int type, SSL_CTX *ctx, unsigned char *d, long len);
363 =item int B<SSL_CTX_use_PrivateKey_file>(SSL_CTX *ctx, char *file, int type);
365 =item int B<SSL_CTX_use_RSAPrivateKey>(SSL_CTX *ctx, RSA *rsa);
367 =item int B<SSL_CTX_use_RSAPrivateKey_ASN1>(SSL_CTX *ctx, unsigned char *d, long len);
369 =item int B<SSL_CTX_use_RSAPrivateKey_file>(SSL_CTX *ctx, char *file, int type);
371 =item int B<SSL_CTX_use_certificate>(SSL_CTX *ctx, X509 *x);
373 =item int B<SSL_CTX_use_certificate_ASN1>(SSL_CTX *ctx, int len, unsigned char *d);
375 =item int B<SSL_CTX_use_certificate_file>(SSL_CTX *ctx, char *file, int type);
377 =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));
379 =item int B<SSL_CTX_use_psk_identity_hint>(SSL_CTX *ctx, const char *hint);
381 =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));
388 =head2 DEALING WITH SESSIONS
390 Here we document the various API functions which deal with the SSL/TLS
391 sessions defined in the B<SSL_SESSION> structures.
395 =item int B<SSL_SESSION_cmp>(const SSL_SESSION *a, const SSL_SESSION *b);
397 =item void B<SSL_SESSION_free>(SSL_SESSION *ss);
399 =item char *B<SSL_SESSION_get_app_data>(SSL_SESSION *s);
401 =item char *B<SSL_SESSION_get_ex_data>(const SSL_SESSION *s, int idx);
403 =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))
405 =item long B<SSL_SESSION_get_time>(const SSL_SESSION *s);
407 =item long B<SSL_SESSION_get_timeout>(const SSL_SESSION *s);
409 =item unsigned long B<SSL_SESSION_hash>(const SSL_SESSION *a);
411 =item SSL_SESSION *B<SSL_SESSION_new>(void);
413 =item int B<SSL_SESSION_print>(BIO *bp, const SSL_SESSION *x);
415 =item int B<SSL_SESSION_print_fp>(FILE *fp, const SSL_SESSION *x);
417 =item void B<SSL_SESSION_set_app_data>(SSL_SESSION *s, char *a);
419 =item int B<SSL_SESSION_set_ex_data>(SSL_SESSION *s, int idx, char *arg);
421 =item long B<SSL_SESSION_set_time>(SSL_SESSION *s, long t);
423 =item long B<SSL_SESSION_set_timeout>(SSL_SESSION *s, long t);
427 =head2 DEALING WITH CONNECTIONS
429 Here we document the various API functions which deal with the SSL/TLS
430 connection defined in the B<SSL> structure.
434 =item int B<SSL_accept>(SSL *ssl);
436 =item int B<SSL_add_dir_cert_subjects_to_stack>(STACK *stack, const char *dir);
438 =item int B<SSL_add_file_cert_subjects_to_stack>(STACK *stack, const char *file);
440 =item int B<SSL_add_client_CA>(SSL *ssl, X509 *x);
442 =item char *B<SSL_alert_desc_string>(int value);
444 =item char *B<SSL_alert_desc_string_long>(int value);
446 =item char *B<SSL_alert_type_string>(int value);
448 =item char *B<SSL_alert_type_string_long>(int value);
450 =item int B<SSL_check_private_key>(const SSL *ssl);
452 =item void B<SSL_clear>(SSL *ssl);
454 =item long B<SSL_clear_num_renegotiations>(SSL *ssl);
456 =item int B<SSL_connect>(SSL *ssl);
458 =item void B<SSL_copy_session_id>(SSL *t, const SSL *f);
460 =item long B<SSL_ctrl>(SSL *ssl, int cmd, long larg, char *parg);
462 =item int B<SSL_do_handshake>(SSL *ssl);
464 =item SSL *B<SSL_dup>(SSL *ssl);
466 =item STACK *B<SSL_dup_CA_list>(STACK *sk);
468 =item void B<SSL_free>(SSL *ssl);
470 =item SSL_CTX *B<SSL_get_SSL_CTX>(const SSL *ssl);
472 =item char *B<SSL_get_app_data>(SSL *ssl);
474 =item X509 *B<SSL_get_certificate>(const SSL *ssl);
476 =item const char *B<SSL_get_cipher>(const SSL *ssl);
478 =item int B<SSL_get_cipher_bits>(const SSL *ssl, int *alg_bits);
480 =item char *B<SSL_get_cipher_list>(const SSL *ssl, int n);
482 =item char *B<SSL_get_cipher_name>(const SSL *ssl);
484 =item char *B<SSL_get_cipher_version>(const SSL *ssl);
486 =item STACK *B<SSL_get_ciphers>(const SSL *ssl);
488 =item STACK *B<SSL_get_client_CA_list>(const SSL *ssl);
490 =item SSL_CIPHER *B<SSL_get_current_cipher>(SSL *ssl);
492 =item long B<SSL_get_default_timeout>(const SSL *ssl);
494 =item int B<SSL_get_error>(const SSL *ssl, int i);
496 =item char *B<SSL_get_ex_data>(const SSL *ssl, int idx);
498 =item int B<SSL_get_ex_data_X509_STORE_CTX_idx>(void);
500 =item int B<SSL_get_ex_new_index>(long argl, char *argp, int (*new_func);(void), int (*dup_func)(void), void (*free_func)(void))
502 =item int B<SSL_get_fd>(const SSL *ssl);
504 =item void (*B<SSL_get_info_callback>(const SSL *ssl);)()
506 =item STACK *B<SSL_get_peer_cert_chain>(const SSL *ssl);
508 =item X509 *B<SSL_get_peer_certificate>(const SSL *ssl);
510 =item EVP_PKEY *B<SSL_get_privatekey>(SSL *ssl);
512 =item int B<SSL_get_quiet_shutdown>(const SSL *ssl);
514 =item BIO *B<SSL_get_rbio>(const SSL *ssl);
516 =item int B<SSL_get_read_ahead>(const SSL *ssl);
518 =item SSL_SESSION *B<SSL_get_session>(const SSL *ssl);
520 =item char *B<SSL_get_shared_ciphers>(const SSL *ssl, char *buf, int len);
522 =item int B<SSL_get_shutdown>(const SSL *ssl);
524 =item const SSL_METHOD *B<SSL_get_ssl_method>(SSL *ssl);
526 =item int B<SSL_get_state>(const SSL *ssl);
528 =item long B<SSL_get_time>(const SSL *ssl);
530 =item long B<SSL_get_timeout>(const SSL *ssl);
532 =item int (*B<SSL_get_verify_callback>(const SSL *ssl))(int,X509_STORE_CTX *)
534 =item int B<SSL_get_verify_mode>(const SSL *ssl);
536 =item long B<SSL_get_verify_result>(const SSL *ssl);
538 =item char *B<SSL_get_version>(const SSL *ssl);
540 =item BIO *B<SSL_get_wbio>(const SSL *ssl);
542 =item int B<SSL_in_accept_init>(SSL *ssl);
544 =item int B<SSL_in_before>(SSL *ssl);
546 =item int B<SSL_in_connect_init>(SSL *ssl);
548 =item int B<SSL_in_init>(SSL *ssl);
550 =item int B<SSL_is_init_finished>(SSL *ssl);
552 =item STACK *B<SSL_load_client_CA_file>(char *file);
554 =item void B<SSL_load_error_strings>(void);
556 =item SSL *B<SSL_new>(SSL_CTX *ctx);
558 =item long B<SSL_num_renegotiations>(SSL *ssl);
560 =item int B<SSL_peek>(SSL *ssl, void *buf, int num);
562 =item int B<SSL_pending>(const SSL *ssl);
564 =item int B<SSL_read>(SSL *ssl, void *buf, int num);
566 =item int B<SSL_renegotiate>(SSL *ssl);
568 =item char *B<SSL_rstate_string>(SSL *ssl);
570 =item char *B<SSL_rstate_string_long>(SSL *ssl);
572 =item long B<SSL_session_reused>(SSL *ssl);
574 =item void B<SSL_set_accept_state>(SSL *ssl);
576 =item void B<SSL_set_app_data>(SSL *ssl, char *arg);
578 =item void B<SSL_set_bio>(SSL *ssl, BIO *rbio, BIO *wbio);
580 =item int B<SSL_set_cipher_list>(SSL *ssl, char *str);
582 =item void B<SSL_set_client_CA_list>(SSL *ssl, STACK *list);
584 =item void B<SSL_set_connect_state>(SSL *ssl);
586 =item int B<SSL_set_ex_data>(SSL *ssl, int idx, char *arg);
588 =item int B<SSL_set_fd>(SSL *ssl, int fd);
590 =item void B<SSL_set_info_callback>(SSL *ssl, void (*cb);(void))
592 =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));
594 =item void B<SSL_set_msg_callback_arg>(SSL *ctx, void *arg);
596 =item void B<SSL_set_options>(SSL *ssl, unsigned long op);
598 =item void B<SSL_set_quiet_shutdown>(SSL *ssl, int mode);
600 =item void B<SSL_set_read_ahead>(SSL *ssl, int yes);
602 =item int B<SSL_set_rfd>(SSL *ssl, int fd);
604 =item int B<SSL_set_session>(SSL *ssl, SSL_SESSION *session);
606 =item void B<SSL_set_shutdown>(SSL *ssl, int mode);
608 =item int B<SSL_set_ssl_method>(SSL *ssl, const SSL_METHOD *meth);
610 =item void B<SSL_set_time>(SSL *ssl, long t);
612 =item void B<SSL_set_timeout>(SSL *ssl, long t);
614 =item void B<SSL_set_verify>(SSL *ssl, int mode, int (*callback);(void))
616 =item void B<SSL_set_verify_result>(SSL *ssl, long arg);
618 =item int B<SSL_set_wfd>(SSL *ssl, int fd);
620 =item int B<SSL_shutdown>(SSL *ssl);
622 =item int B<SSL_state>(const SSL *ssl);
624 =item char *B<SSL_state_string>(const SSL *ssl);
626 =item char *B<SSL_state_string_long>(const SSL *ssl);
628 =item long B<SSL_total_renegotiations>(SSL *ssl);
630 =item int B<SSL_use_PrivateKey>(SSL *ssl, EVP_PKEY *pkey);
632 =item int B<SSL_use_PrivateKey_ASN1>(int type, SSL *ssl, unsigned char *d, long len);
634 =item int B<SSL_use_PrivateKey_file>(SSL *ssl, char *file, int type);
636 =item int B<SSL_use_RSAPrivateKey>(SSL *ssl, RSA *rsa);
638 =item int B<SSL_use_RSAPrivateKey_ASN1>(SSL *ssl, unsigned char *d, long len);
640 =item int B<SSL_use_RSAPrivateKey_file>(SSL *ssl, char *file, int type);
642 =item int B<SSL_use_certificate>(SSL *ssl, X509 *x);
644 =item int B<SSL_use_certificate_ASN1>(SSL *ssl, int len, unsigned char *d);
646 =item int B<SSL_use_certificate_file>(SSL *ssl, char *file, int type);
648 =item int B<SSL_version>(const SSL *ssl);
650 =item int B<SSL_want>(const SSL *ssl);
652 =item int B<SSL_want_nothing>(const SSL *ssl);
654 =item int B<SSL_want_read>(const SSL *ssl);
656 =item int B<SSL_want_write>(const SSL *ssl);
658 =item int B<SSL_want_x509_lookup>(const SSL *ssl);
660 =item int B<SSL_write>(SSL *ssl, const void *buf, int num);
662 =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));
664 =item int B<SSL_use_psk_identity_hint>(SSL *ssl, const char *hint);
666 =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));
668 =item const char *B<SSL_get_psk_identity_hint>(SSL *ssl);
670 =item const char *B<SSL_get_psk_identity>(SSL *ssl);
676 L<openssl(1)|openssl(1)>, L<crypto(3)|crypto(3)>,
677 L<SSL_accept(3)|SSL_accept(3)>, L<SSL_clear(3)|SSL_clear(3)>,
678 L<SSL_connect(3)|SSL_connect(3)>,
679 L<SSL_CIPHER_get_name(3)|SSL_CIPHER_get_name(3)>,
680 L<SSL_COMP_add_compression_method(3)|SSL_COMP_add_compression_method(3)>,
681 L<SSL_CTX_add_extra_chain_cert(3)|SSL_CTX_add_extra_chain_cert(3)>,
682 L<SSL_CTX_add_session(3)|SSL_CTX_add_session(3)>,
683 L<SSL_CTX_ctrl(3)|SSL_CTX_ctrl(3)>,
684 L<SSL_CTX_flush_sessions(3)|SSL_CTX_flush_sessions(3)>,
685 L<SSL_CTX_get_ex_new_index(3)|SSL_CTX_get_ex_new_index(3)>,
686 L<SSL_CTX_get_verify_mode(3)|SSL_CTX_get_verify_mode(3)>,
687 L<SSL_CTX_load_verify_locations(3)|SSL_CTX_load_verify_locations(3)>
688 L<SSL_CTX_new(3)|SSL_CTX_new(3)>,
689 L<SSL_CTX_sess_number(3)|SSL_CTX_sess_number(3)>,
690 L<SSL_CTX_sess_set_cache_size(3)|SSL_CTX_sess_set_cache_size(3)>,
691 L<SSL_CTX_sess_set_get_cb(3)|SSL_CTX_sess_set_get_cb(3)>,
692 L<SSL_CTX_sessions(3)|SSL_CTX_sessions(3)>,
693 L<SSL_CTX_set_cert_store(3)|SSL_CTX_set_cert_store(3)>,
694 L<SSL_CTX_set_cert_verify_callback(3)|SSL_CTX_set_cert_verify_callback(3)>,
695 L<SSL_CTX_set_cipher_list(3)|SSL_CTX_set_cipher_list(3)>,
696 L<SSL_CTX_set_client_CA_list(3)|SSL_CTX_set_client_CA_list(3)>,
697 L<SSL_CTX_set_client_cert_cb(3)|SSL_CTX_set_client_cert_cb(3)>,
698 L<SSL_CTX_set_default_passwd_cb(3)|SSL_CTX_set_default_passwd_cb(3)>,
699 L<SSL_CTX_set_generate_session_id(3)|SSL_CTX_set_generate_session_id(3)>,
700 L<SSL_CTX_set_info_callback(3)|SSL_CTX_set_info_callback(3)>,
701 L<SSL_CTX_set_max_cert_list(3)|SSL_CTX_set_max_cert_list(3)>,
702 L<SSL_CTX_set_mode(3)|SSL_CTX_set_mode(3)>,
703 L<SSL_CTX_set_msg_callback(3)|SSL_CTX_set_msg_callback(3)>,
704 L<SSL_CTX_set_options(3)|SSL_CTX_set_options(3)>,
705 L<SSL_CTX_set_quiet_shutdown(3)|SSL_CTX_set_quiet_shutdown(3)>,
706 L<SSL_CTX_set_session_cache_mode(3)|SSL_CTX_set_session_cache_mode(3)>,
707 L<SSL_CTX_set_session_id_context(3)|SSL_CTX_set_session_id_context(3)>,
708 L<SSL_CTX_set_ssl_version(3)|SSL_CTX_set_ssl_version(3)>,
709 L<SSL_CTX_set_timeout(3)|SSL_CTX_set_timeout(3)>,
710 L<SSL_CTX_set_tmp_rsa_callback(3)|SSL_CTX_set_tmp_rsa_callback(3)>,
711 L<SSL_CTX_set_tmp_dh_callback(3)|SSL_CTX_set_tmp_dh_callback(3)>,
712 L<SSL_CTX_set_verify(3)|SSL_CTX_set_verify(3)>,
713 L<SSL_CTX_use_certificate(3)|SSL_CTX_use_certificate(3)>,
714 L<SSL_alert_type_string(3)|SSL_alert_type_string(3)>,
715 L<SSL_do_handshake(3)|SSL_do_handshake(3)>,
716 L<SSL_get_SSL_CTX(3)|SSL_get_SSL_CTX(3)>,
717 L<SSL_get_ciphers(3)|SSL_get_ciphers(3)>,
718 L<SSL_get_client_CA_list(3)|SSL_get_client_CA_list(3)>,
719 L<SSL_get_default_timeout(3)|SSL_get_default_timeout(3)>,
720 L<SSL_get_error(3)|SSL_get_error(3)>,
721 L<SSL_get_ex_data_X509_STORE_CTX_idx(3)|SSL_get_ex_data_X509_STORE_CTX_idx(3)>,
722 L<SSL_get_ex_new_index(3)|SSL_get_ex_new_index(3)>,
723 L<SSL_get_fd(3)|SSL_get_fd(3)>,
724 L<SSL_get_peer_cert_chain(3)|SSL_get_peer_cert_chain(3)>,
725 L<SSL_get_rbio(3)|SSL_get_rbio(3)>,
726 L<SSL_get_session(3)|SSL_get_session(3)>,
727 L<SSL_get_verify_result(3)|SSL_get_verify_result(3)>,
728 L<SSL_get_version(3)|SSL_get_version(3)>,
729 L<SSL_library_init(3)|SSL_library_init(3)>,
730 L<SSL_load_client_CA_file(3)|SSL_load_client_CA_file(3)>,
731 L<SSL_new(3)|SSL_new(3)>,
732 L<SSL_pending(3)|SSL_pending(3)>,
733 L<SSL_read(3)|SSL_read(3)>,
734 L<SSL_rstate_string(3)|SSL_rstate_string(3)>,
735 L<SSL_session_reused(3)|SSL_session_reused(3)>,
736 L<SSL_set_bio(3)|SSL_set_bio(3)>,
737 L<SSL_set_connect_state(3)|SSL_set_connect_state(3)>,
738 L<SSL_set_fd(3)|SSL_set_fd(3)>,
739 L<SSL_set_session(3)|SSL_set_session(3)>,
740 L<SSL_set_shutdown(3)|SSL_set_shutdown(3)>,
741 L<SSL_shutdown(3)|SSL_shutdown(3)>,
742 L<SSL_state_string(3)|SSL_state_string(3)>,
743 L<SSL_want(3)|SSL_want(3)>,
744 L<SSL_write(3)|SSL_write(3)>,
745 L<SSL_SESSION_free(3)|SSL_SESSION_free(3)>,
746 L<SSL_SESSION_get_ex_new_index(3)|SSL_SESSION_get_ex_new_index(3)>,
747 L<SSL_SESSION_get_time(3)|SSL_SESSION_get_time(3)>,
748 L<d2i_SSL_SESSION(3)|d2i_SSL_SESSION(3)>,
749 L<SSL_CTX_set_psk_client_callback(3)|SSL_CTX_set_psk_client_callback(3)>,
750 L<SSL_CTX_use_psk_identity_hint(3)|SSL_CTX_use_psk_identity_hint(3)>,
751 L<SSL_get_psk_identity(3)|SSL_get_psk_identity(3)>
755 The L<ssl(3)|ssl(3)> document appeared in OpenSSL 0.9.2