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=pod =head1 NAME SSL - OpenSSL SSL/TLS library =head1 SYNOPSIS =head1 DESCRIPTION The OpenSSL B<ssl> library implements the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols. It provides a rich API which is documented here. At first the library must be initialized; see L<SSL_library_init(3)|SSL_library_init(3)>. Then an B<SSL_CTX> object is created as a framework to establish TLS/SSL enabled connections (see L<SSL_CTX_new(3)|SSL_CTX_new(3)>). Various options regarding certificates, algorithms etc. can be set in this object. When a network connection has been created, it can be assigned to an B<SSL> object. After the B<SSL> object has been created using L<SSL_new(3)|SSL_new(3)>, L<SSL_set_fd(3)|SSL_set_fd(3)> or L<SSL_set_bio(3)|SSL_set_bio(3)> can be used to associate the network connection with the object. Then the TLS/SSL handshake is performed using L<SSL_accept(3)|SSL_accept(3)> or L<SSL_connect(3)|SSL_connect(3)> respectively. L<SSL_read(3)|SSL_read(3)> and L<SSL_write(3)|SSL_write(3)> are used to read and write data on the TLS/SSL connection. L<SSL_shutdown(3)|SSL_shutdown(3)> can be used to shut down the TLS/SSL connection. =head1 DATA STRUCTURES Currently the OpenSSL B<ssl> library functions deals with the following data structures: =over 4 =item B<SSL_METHOD> (SSL Method) That's a dispatch structure describing the internal B<ssl> library methods/functions which implement the various protocol versions (SSLv1, SSLv2 and TLSv1). It's needed to create an B<SSL_CTX>. =item B<SSL_CIPHER> (SSL Cipher) This structure holds the algorithm information for a particular cipher which are a core part of the SSL/TLS protocol. The available ciphers are configured on a B<SSL_CTX> basis and the actually used ones are then part of the B<SSL_SESSION>. =item B<SSL_CTX> (SSL Context) That's the global context structure which is created by a server or client once per program life-time and which holds mainly default values for the B<SSL> structures which are later created for the connections. =item B<SSL_SESSION> (SSL Session) This is a structure containing the current TLS/SSL session details for a connection: B<SSL_CIPHER>s, client and server certificates, keys, etc. =item B<SSL> (SSL Connection) That's the main SSL/TLS structure which is created by a server or client per established connection. This actually is the core structure in the SSL API. Under run-time the application usually deals with this structure which has links to mostly all other structures. =back =head1 HEADER FILES Currently the OpenSSL B<ssl> library provides the following C header files containing the prototypes for the data structures and and functions: =over 4 =item B<ssl.h> That's the common header file for the SSL/TLS API. Include it into your program to make the API of the B<ssl> library available. It internally includes both more private SSL headers and headers from the B<crypto> library. Whenever you need hard-core details on the internals of the SSL API, look inside this header file. =item B<ssl2.h> That's the sub header file dealing with the SSLv2 protocol only. I<Usually you don't have to include it explicitly because it's already included by ssl.h>. =item B<ssl3.h> That's the sub header file dealing with the SSLv3 protocol only. I<Usually you don't have to include it explicitly because it's already included by ssl.h>. =item B<ssl23.h> That's the sub header file dealing with the combined use of the SSLv2 and SSLv3 protocols. I<Usually you don't have to include it explicitly because it's already included by ssl.h>. =item B<tls1.h> That's the sub header file dealing with the TLSv1 protocol only. I<Usually you don't have to include it explicitly because it's already included by ssl.h>. =back =head1 API FUNCTIONS Currently the OpenSSL B<ssl> library exports 214 API functions. They are documented in the following: =head2 DEALING WITH PROTOCOL METHODS Here we document the various API functions which deal with the SSL/TLS protocol methods defined in B<SSL_METHOD> structures. =over 4 =item SSL_METHOD *B<SSLv2_client_method>(void); Constructor for the SSLv2 SSL_METHOD structure for a dedicated client. =item SSL_METHOD *B<SSLv2_server_method>(void); Constructor for the SSLv2 SSL_METHOD structure for a dedicated server. =item SSL_METHOD *B<SSLv2_method>(void); Constructor for the SSLv2 SSL_METHOD structure for combined client and server. =item SSL_METHOD *B<SSLv3_client_method>(void); Constructor for the SSLv3 SSL_METHOD structure for a dedicated client. =item SSL_METHOD *B<SSLv3_server_method>(void); Constructor for the SSLv3 SSL_METHOD structure for a dedicated server. =item SSL_METHOD *B<SSLv3_method>(void); Constructor for the SSLv3 SSL_METHOD structure for combined client and server. =item SSL_METHOD *B<TLSv1_client_method>(void); Constructor for the TLSv1 SSL_METHOD structure for a dedicated client. =item SSL_METHOD *B<TLSv1_server_method>(void); Constructor for the TLSv1 SSL_METHOD structure for a dedicated server. =item SSL_METHOD *B<TLSv1_method>(void); Constructor for the TLSv1 SSL_METHOD structure for combined client and server. =back =head2 DEALING WITH CIPHERS Here we document the various API functions which deal with the SSL/TLS ciphers defined in B<SSL_CIPHER> structures. =over 4 =item char *B<SSL_CIPHER_description>(SSL_CIPHER *cipher, char *buf, int len); Write a string to I<buf> (with a maximum size of I<len>) containing a human readable description of I<cipher>. Returns I<buf>. =item int B<SSL_CIPHER_get_bits>(SSL_CIPHER *cipher, int *alg_bits); Determine the number of bits in I<cipher>. Because of export crippled ciphers there are two bits: The bits the algorithm supports in general (stored to I<alg_bits>) and the bits which are actually used (the return value). =item const char *B<SSL_CIPHER_get_name>(SSL_CIPHER *cipher); Return the internal name of I<cipher> as a string. These are the various strings defined by the I<SSL2_TXT_xxx>, I<SSL3_TXT_xxx> and I<TLS1_TXT_xxx> definitions in the header files. =item char *B<SSL_CIPHER_get_version>(SSL_CIPHER *cipher); Returns a string like "C<TLSv1/SSLv3>" or "C<SSLv2>" which indicates the SSL/TLS protocol version to which I<cipher> belongs (i.e. where it was defined in the specification the first time). =back =head2 DEALING WITH PROTOCOL CONTEXTS Here we document the various API functions which deal with the SSL/TLS protocol context defined in the B<SSL_CTX> structure. =over 4 =item int B<SSL_CTX_add_client_CA>(SSL_CTX *ctx, X509 *x); =item long B<SSL_CTX_add_extra_chain_cert>(SSL_CTX *ctx, X509 *x509); =item int B<SSL_CTX_add_session>(SSL_CTX *ctx, SSL_SESSION *c); =item int B<SSL_CTX_check_private_key>(const SSL_CTX *ctx); =item long B<SSL_CTX_ctrl>(SSL_CTX *ctx, int cmd, long larg, char *parg); =item void B<SSL_CTX_flush_sessions>(SSL_CTX *s, long t); =item void B<SSL_CTX_free>(SSL_CTX *a); =item char *B<SSL_CTX_get_app_data>(SSL_CTX *ctx); =item X509_STORE *B<SSL_CTX_get_cert_store>(SSL_CTX *ctx); =item STACK *B<SSL_CTX_get_client_CA_list>(const SSL_CTX *ctx); =item int (*B<SSL_CTX_get_client_cert_cb>(SSL_CTX *ctx))(SSL *ssl, X509 **x509, EVP_PKEY **pkey); =item char *B<SSL_CTX_get_ex_data>(const SSL_CTX *s, int idx); =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)) =item void (*B<SSL_CTX_get_info_callback>(SSL_CTX *ctx))(SSL *ssl, int cb, int ret); =item int B<SSL_CTX_get_quiet_shutdown>(const SSL_CTX *ctx); =item int B<SSL_CTX_get_session_cache_mode>(SSL_CTX *ctx); =item long B<SSL_CTX_get_timeout>(const SSL_CTX *ctx); =item int (*B<SSL_CTX_get_verify_callback>(const SSL_CTX *ctx))(int ok, X509_STORE_CTX *ctx); =item int B<SSL_CTX_get_verify_mode>(SSL_CTX *ctx); =item int B<SSL_CTX_load_verify_locations>(SSL_CTX *ctx, char *CAfile, char *CApath); =item long B<SSL_CTX_need_tmp_RSA>(SSL_CTX *ctx); =item SSL_CTX *B<SSL_CTX_new>(SSL_METHOD *meth); =item int B<SSL_CTX_remove_session>(SSL_CTX *ctx, SSL_SESSION *c); =item int B<SSL_CTX_sess_accept>(SSL_CTX *ctx); =item int B<SSL_CTX_sess_accept_good>(SSL_CTX *ctx); =item int B<SSL_CTX_sess_accept_renegotiate>(SSL_CTX *ctx); =item int B<SSL_CTX_sess_cache_full>(SSL_CTX *ctx); =item int B<SSL_CTX_sess_cb_hits>(SSL_CTX *ctx); =item int B<SSL_CTX_sess_connect>(SSL_CTX *ctx); =item int B<SSL_CTX_sess_connect_good>(SSL_CTX *ctx); =item int B<SSL_CTX_sess_connect_renegotiate>(SSL_CTX *ctx); =item int B<SSL_CTX_sess_get_cache_size>(SSL_CTX *ctx); =item SSL_SESSION *(*B<SSL_CTX_sess_get_get_cb>(SSL_CTX *ctx))(SSL *ssl, unsigned char *data, int len, int *copy); =item int (*B<SSL_CTX_sess_get_new_cb>(SSL_CTX *ctx)(SSL *ssl, SSL_SESSION *sess); =item void (*B<SSL_CTX_sess_get_remove_cb>(SSL_CTX *ctx)(SSL_CTX *ctx, SSL_SESSION *sess); =item int B<SSL_CTX_sess_hits>(SSL_CTX *ctx); =item int B<SSL_CTX_sess_misses>(SSL_CTX *ctx); =item int B<SSL_CTX_sess_number>(SSL_CTX *ctx); =item void B<SSL_CTX_sess_set_cache_size>(SSL_CTX *ctx,t); =item void B<SSL_CTX_sess_set_get_cb>(SSL_CTX *ctx, SSL_SESSION *(*cb)(SSL *ssl, unsigned char *data, int len, int *copy)); =item void B<SSL_CTX_sess_set_new_cb>(SSL_CTX *ctx, int (*cb)(SSL *ssl, SSL_SESSION *sess)); =item void B<SSL_CTX_sess_set_remove_cb>(SSL_CTX *ctx, void (*cb)(SSL_CTX *ctx, SSL_SESSION *sess)); =item int B<SSL_CTX_sess_timeouts>(SSL_CTX *ctx); =item LHASH *B<SSL_CTX_sessions>(SSL_CTX *ctx); =item void B<SSL_CTX_set_app_data>(SSL_CTX *ctx, void *arg); =item void B<SSL_CTX_set_cert_store>(SSL_CTX *ctx, X509_STORE *cs); =item void B<SSL_CTX_set_cert_verify_cb>(SSL_CTX *ctx, int (*cb)(), char *arg) =item int B<SSL_CTX_set_cipher_list>(SSL_CTX *ctx, char *str); =item void B<SSL_CTX_set_client_CA_list>(SSL_CTX *ctx, STACK *list); =item void B<SSL_CTX_set_client_cert_cb>(SSL_CTX *ctx, int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey)); =item void B<SSL_CTX_set_default_passwd_cb>(SSL_CTX *ctx, int (*cb);(void)) =item void B<SSL_CTX_set_default_read_ahead>(SSL_CTX *ctx, int m); =item int B<SSL_CTX_set_default_verify_paths>(SSL_CTX *ctx); =item int B<SSL_CTX_set_ex_data>(SSL_CTX *s, int idx, char *arg); =item void B<SSL_CTX_set_info_callback>(SSL_CTX *ctx, void (*cb)(SSL *ssl, int cb, int ret)); =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)); =item void B<SSL_CTX_set_msg_callback_arg>(SSL_CTX *ctx, void *arg); =item void B<SSL_CTX_set_options>(SSL_CTX *ctx, unsigned long op); =item void B<SSL_CTX_set_quiet_shutdown>(SSL_CTX *ctx, int mode); =item void B<SSL_CTX_set_session_cache_mode>(SSL_CTX *ctx, int mode); =item int B<SSL_CTX_set_ssl_version>(SSL_CTX *ctx, SSL_METHOD *meth); =item void B<SSL_CTX_set_timeout>(SSL_CTX *ctx, long t); =item long B<SSL_CTX_set_tmp_dh>(SSL_CTX* ctx, DH *dh); =item long B<SSL_CTX_set_tmp_dh_callback>(SSL_CTX *ctx, DH *(*cb)(void)); =item long B<SSL_CTX_set_tmp_rsa>(SSL_CTX *ctx, RSA *rsa); =item SSL_CTX_set_tmp_rsa_callback 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>));> Sets the callback which will be called when a temporary private key is required. The B<C<export>> flag will be set if the reason for needing a temp key is that an export ciphersuite is in use, in which case, B<C<keylength>> will contain the required keylength in bits. Generate a key of appropriate size (using ???) and return it. =item SSL_set_tmp_rsa_callback long B<SSL_set_tmp_rsa_callback>(SSL *ssl, RSA *(*cb)(SSL *ssl, int export, int keylength)); The same as B<SSL_CTX_set_tmp_rsa_callback>, except it operates on an SSL session instead of a context. =item void B<SSL_CTX_set_verify>(SSL_CTX *ctx, int mode, int (*cb);(void)) =item int B<SSL_CTX_use_PrivateKey>(SSL_CTX *ctx, EVP_PKEY *pkey); =item int B<SSL_CTX_use_PrivateKey_ASN1>(int type, SSL_CTX *ctx, unsigned char *d, long len); =item int B<SSL_CTX_use_PrivateKey_file>(SSL_CTX *ctx, char *file, int type); =item int B<SSL_CTX_use_RSAPrivateKey>(SSL_CTX *ctx, RSA *rsa); =item int B<SSL_CTX_use_RSAPrivateKey_ASN1>(SSL_CTX *ctx, unsigned char *d, long len); =item int B<SSL_CTX_use_RSAPrivateKey_file>(SSL_CTX *ctx, char *file, int type); =item int B<SSL_CTX_use_certificate>(SSL_CTX *ctx, X509 *x); =item int B<SSL_CTX_use_certificate_ASN1>(SSL_CTX *ctx, int len, unsigned char *d); =item int B<SSL_CTX_use_certificate_file>(SSL_CTX *ctx, char *file, int type); =back =head2 DEALING WITH SESSIONS Here we document the various API functions which deal with the SSL/TLS sessions defined in the B<SSL_SESSION> structures. =over 4 =item int B<SSL_SESSION_cmp>(const SSL_SESSION *a, const SSL_SESSION *b); =item void B<SSL_SESSION_free>(SSL_SESSION *ss); =item char *B<SSL_SESSION_get_app_data>(SSL_SESSION *s); =item char *B<SSL_SESSION_get_ex_data>(const SSL_SESSION *s, int idx); =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)) =item long B<SSL_SESSION_get_time>(const SSL_SESSION *s); =item long B<SSL_SESSION_get_timeout>(const SSL_SESSION *s); =item unsigned long B<SSL_SESSION_hash>(const SSL_SESSION *a); =item SSL_SESSION *B<SSL_SESSION_new>(void); =item int B<SSL_SESSION_print>(BIO *bp, const SSL_SESSION *x); =item int B<SSL_SESSION_print_fp>(FILE *fp, const SSL_SESSION *x); =item void B<SSL_SESSION_set_app_data>(SSL_SESSION *s, char *a); =item int B<SSL_SESSION_set_ex_data>(SSL_SESSION *s, int idx, char *arg); =item long B<SSL_SESSION_set_time>(SSL_SESSION *s, long t); =item long B<SSL_SESSION_set_timeout>(SSL_SESSION *s, long t); =back =head2 DEALING WITH CONNECTIONS Here we document the various API functions which deal with the SSL/TLS connection defined in the B<SSL> structure. =over 4 =item int B<SSL_accept>(SSL *ssl); =item int B<SSL_add_dir_cert_subjects_to_stack>(STACK *stack, const char *dir); =item int B<SSL_add_file_cert_subjects_to_stack>(STACK *stack, const char *file); =item int B<SSL_add_client_CA>(SSL *ssl, X509 *x); =item char *B<SSL_alert_desc_string>(int value); =item char *B<SSL_alert_desc_string_long>(int value); =item char *B<SSL_alert_type_string>(int value); =item char *B<SSL_alert_type_string_long>(int value); =item int B<SSL_check_private_key>(const SSL *ssl); =item void B<SSL_clear>(SSL *ssl); =item long B<SSL_clear_num_renegotiations>(SSL *ssl); =item int B<SSL_connect>(SSL *ssl); =item void B<SSL_copy_session_id>(SSL *t, const SSL *f); =item long B<SSL_ctrl>(SSL *ssl, int cmd, long larg, char *parg); =item int B<SSL_do_handshake>(SSL *ssl); =item SSL *B<SSL_dup>(SSL *ssl); =item STACK *B<SSL_dup_CA_list>(STACK *sk); =item void B<SSL_free>(SSL *ssl); =item SSL_CTX *B<SSL_get_SSL_CTX>(const SSL *ssl); =item char *B<SSL_get_app_data>(SSL *ssl); =item X509 *B<SSL_get_certificate>(const SSL *ssl); =item const char *B<SSL_get_cipher>(const SSL *ssl); =item int B<SSL_get_cipher_bits>(const SSL *ssl, int *alg_bits); =item char *B<SSL_get_cipher_list>(const SSL *ssl, int n); =item char *B<SSL_get_cipher_name>(const SSL *ssl); =item char *B<SSL_get_cipher_version>(const SSL *ssl); =item STACK *B<SSL_get_ciphers>(const SSL *ssl); =item STACK *B<SSL_get_client_CA_list>(const SSL *ssl); =item SSL_CIPHER *B<SSL_get_current_cipher>(SSL *ssl); =item long B<SSL_get_default_timeout>(const SSL *ssl); =item int B<SSL_get_error>(const SSL *ssl, int i); =item char *B<SSL_get_ex_data>(const SSL *ssl, int idx); =item int B<SSL_get_ex_data_X509_STORE_CTX_idx>(void); =item int B<SSL_get_ex_new_index>(long argl, char *argp, int (*new_func);(void), int (*dup_func)(void), void (*free_func)(void)) =item int B<SSL_get_fd>(const SSL *ssl); =item void (*B<SSL_get_info_callback>(const SSL *ssl);)() =item STACK *B<SSL_get_peer_cert_chain>(const SSL *ssl); =item X509 *B<SSL_get_peer_certificate>(const SSL *ssl); =item EVP_PKEY *B<SSL_get_privatekey>(SSL *ssl); =item int B<SSL_get_quiet_shutdown>(const SSL *ssl); =item BIO *B<SSL_get_rbio>(const SSL *ssl); =item int B<SSL_get_read_ahead>(const SSL *ssl); =item SSL_SESSION *B<SSL_get_session>(const SSL *ssl); =item char *B<SSL_get_shared_ciphers>(const SSL *ssl, char *buf, int len); =item int B<SSL_get_shutdown>(const SSL *ssl); =item SSL_METHOD *B<SSL_get_ssl_method>(SSL *ssl); =item int B<SSL_get_state>(const SSL *ssl); =item long B<SSL_get_time>(const SSL *ssl); =item long B<SSL_get_timeout>(const SSL *ssl); =item int (*B<SSL_get_verify_callback>(const SSL *ssl))(int,X509_STORE_CTX *) =item int B<SSL_get_verify_mode>(const SSL *ssl); =item long B<SSL_get_verify_result>(const SSL *ssl); =item char *B<SSL_get_version>(const SSL *ssl); =item BIO *B<SSL_get_wbio>(const SSL *ssl); =item int B<SSL_in_accept_init>(SSL *ssl); =item int B<SSL_in_before>(SSL *ssl); =item int B<SSL_in_connect_init>(SSL *ssl); =item int B<SSL_in_init>(SSL *ssl); =item int B<SSL_is_init_finished>(SSL *ssl); =item STACK *B<SSL_load_client_CA_file>(char *file); =item void B<SSL_load_error_strings>(void); =item SSL *B<SSL_new>(SSL_CTX *ctx); =item long B<SSL_num_renegotiations>(SSL *ssl); =item int B<SSL_peek>(SSL *ssl, void *buf, int num); =item int B<SSL_pending>(const SSL *ssl); =item int B<SSL_read>(SSL *ssl, void *buf, int num); =item int B<SSL_renegotiate>(SSL *ssl); =item char *B<SSL_rstate_string>(SSL *ssl); =item char *B<SSL_rstate_string_long>(SSL *ssl); =item long B<SSL_session_reused>(SSL *ssl); =item void B<SSL_set_accept_state>(SSL *ssl); =item void B<SSL_set_app_data>(SSL *ssl, char *arg); =item void B<SSL_set_bio>(SSL *ssl, BIO *rbio, BIO *wbio); =item int B<SSL_set_cipher_list>(SSL *ssl, char *str); =item void B<SSL_set_client_CA_list>(SSL *ssl, STACK *list); =item void B<SSL_set_connect_state>(SSL *ssl); =item int B<SSL_set_ex_data>(SSL *ssl, int idx, char *arg); =item int B<SSL_set_fd>(SSL *ssl, int fd); =item void B<SSL_set_info_callback>(SSL *ssl, void (*cb);(void)) =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)); =item void B<SSL_set_msg_callback_arg>(SSL *ctx, void *arg); =item void B<SSL_set_options>(SSL *ssl, unsigned long op); =item void B<SSL_set_quiet_shutdown>(SSL *ssl, int mode); =item void B<SSL_set_read_ahead>(SSL *ssl, int yes); =item int B<SSL_set_rfd>(SSL *ssl, int fd); =item int B<SSL_set_session>(SSL *ssl, SSL_SESSION *session); =item void B<SSL_set_shutdown>(SSL *ssl, int mode); =item int B<SSL_set_ssl_method>(SSL *ssl, SSL_METHOD *meth); =item void B<SSL_set_time>(SSL *ssl, long t); =item void B<SSL_set_timeout>(SSL *ssl, long t); =item void B<SSL_set_verify>(SSL *ssl, int mode, int (*callback);(void)) =item void B<SSL_set_verify_result>(SSL *ssl, long arg); =item int B<SSL_set_wfd>(SSL *ssl, int fd); =item int B<SSL_shutdown>(SSL *ssl); =item int B<SSL_state>(const SSL *ssl); =item char *B<SSL_state_string>(const SSL *ssl); =item char *B<SSL_state_string_long>(const SSL *ssl); =item long B<SSL_total_renegotiations>(SSL *ssl); =item int B<SSL_use_PrivateKey>(SSL *ssl, EVP_PKEY *pkey); =item int B<SSL_use_PrivateKey_ASN1>(int type, SSL *ssl, unsigned char *d, long len); =item int B<SSL_use_PrivateKey_file>(SSL *ssl, char *file, int type); =item int B<SSL_use_RSAPrivateKey>(SSL *ssl, RSA *rsa); =item int B<SSL_use_RSAPrivateKey_ASN1>(SSL *ssl, unsigned char *d, long len); =item int B<SSL_use_RSAPrivateKey_file>(SSL *ssl, char *file, int type); =item int B<SSL_use_certificate>(SSL *ssl, X509 *x); =item int B<SSL_use_certificate_ASN1>(SSL *ssl, int len, unsigned char *d); =item int B<SSL_use_certificate_file>(SSL *ssl, char *file, int type); =item int B<SSL_version>(const SSL *ssl); =item int B<SSL_want>(const SSL *ssl); =item int B<SSL_want_nothing>(const SSL *ssl); =item int B<SSL_want_read>(const SSL *ssl); =item int B<SSL_want_write>(const SSL *ssl); =item int B<SSL_want_x509_lookup>(const SSL *ssl); =item int B<SSL_write>(SSL *ssl, const void *buf, int num); =back =head1 SEE ALSO L<openssl(1)|openssl(1)>, L<crypto(3)|crypto(3)>, L<SSL_accept(3)|SSL_accept(3)>, L<SSL_clear(3)|SSL_clear(3)>, L<SSL_connect(3)|SSL_connect(3)>, L<SSL_CIPHER_get_name(3)|SSL_CIPHER_get_name(3)>, L<SSL_COMP_add_compression_method(3)|SSL_COMP_add_compression_method(3)>, L<SSL_CTX_add_extra_chain_cert(3)|SSL_CTX_add_extra_chain_cert(3)>, L<SSL_CTX_add_session(3)|SSL_CTX_add_session(3)>, L<SSL_CTX_ctrl(3)|SSL_CTX_ctrl(3)>, L<SSL_CTX_flush_sessions(3)|SSL_CTX_flush_sessions(3)>, L<SSL_CTX_get_ex_new_index(3)|SSL_CTX_get_ex_new_index(3)>, L<SSL_CTX_get_verify_mode(3)|SSL_CTX_get_verify_mode(3)>, L<SSL_CTX_load_verify_locations(3)|SSL_CTX_load_verify_locations(3)> L<SSL_CTX_new(3)|SSL_CTX_new(3)>, L<SSL_CTX_sess_number(3)|SSL_CTX_sess_number(3)>, L<SSL_CTX_sess_set_cache_size(3)|SSL_CTX_sess_set_cache_size(3)>, L<SSL_CTX_sess_set_get_cb(3)|SSL_CTX_sess_set_get_cb(3)>, L<SSL_CTX_sessions(3)|SSL_CTX_sessions(3)>, L<SSL_CTX_set_cert_store(3)|SSL_CTX_set_cert_store(3)>, L<SSL_CTX_set_cert_verify_callback(3)|SSL_CTX_set_cert_verify_callback(3)>, L<SSL_CTX_set_cipher_list(3)|SSL_CTX_set_cipher_list(3)>, L<SSL_CTX_set_client_CA_list(3)|SSL_CTX_set_client_CA_list(3)>, L<SSL_CTX_set_client_cert_cb(3)|SSL_CTX_set_client_cert_cb(3)>, L<SSL_CTX_set_default_passwd_cb(3)|SSL_CTX_set_default_passwd_cb(3)>, L<SSL_CTX_set_generate_session_id(3)|SSL_CTX_set_generate_session_id(3)>, L<SSL_CTX_set_info_callback(3)|SSL_CTX_set_info_callback(3)>, L<SSL_CTX_set_max_cert_list(3)|SSL_CTX_set_max_cert_list(3)>, L<SSL_CTX_set_mode(3)|SSL_CTX_set_mode(3)>, L<SSL_CTX_set_msg_callback(3)|SSL_CTX_set_msg_callback(3)>, L<SSL_CTX_set_options(3)|SSL_CTX_set_options(3)>, L<SSL_CTX_set_quiet_shutdown(3)|SSL_CTX_set_quiet_shutdown(3)>, L<SSL_CTX_set_session_cache_mode(3)|SSL_CTX_set_session_cache_mode(3)>, L<SSL_CTX_set_session_id_context(3)|SSL_CTX_set_session_id_context(3)>, L<SSL_CTX_set_ssl_version(3)|SSL_CTX_set_ssl_version(3)>, L<SSL_CTX_set_timeout(3)|SSL_CTX_set_timeout(3)>, L<SSL_CTX_set_tmp_rsa_callback(3)|SSL_CTX_set_tmp_rsa_callback(3)>, L<SSL_CTX_set_tmp_dh_callback(3)|SSL_CTX_set_tmp_dh_callback(3)>, L<SSL_CTX_set_verify(3)|SSL_CTX_set_verify(3)>, L<SSL_CTX_use_certificate(3)|SSL_CTX_use_certificate(3)>, L<SSL_alert_type_string(3)|SSL_alert_type_string(3)>, L<SSL_do_handshake(3)|SSL_do_handshake(3)>, L<SSL_get_SSL_CTX(3)|SSL_get_SSL_CTX(3)>, L<SSL_get_ciphers(3)|SSL_get_ciphers(3)>, L<SSL_get_client_CA_list(3)|SSL_get_client_CA_list(3)>, L<SSL_get_default_timeout(3)|SSL_get_default_timeout(3)>, L<SSL_get_error(3)|SSL_get_error(3)>, L<SSL_get_ex_data_X509_STORE_CTX_idx(3)|SSL_get_ex_data_X509_STORE_CTX_idx(3)>, L<SSL_get_ex_new_index(3)|SSL_get_ex_new_index(3)>, L<SSL_get_fd(3)|SSL_get_fd(3)>, L<SSL_get_peer_cert_chain(3)|SSL_get_peer_cert_chain(3)>, L<SSL_get_rbio(3)|SSL_get_rbio(3)>, L<SSL_get_session(3)|SSL_get_session(3)>, L<SSL_get_verify_result(3)|SSL_get_verify_result(3)>, L<SSL_get_version(3)|SSL_get_version(3)>, L<SSL_library_init(3)|SSL_library_init(3)>, L<SSL_load_client_CA_file(3)|SSL_load_client_CA_file(3)>, L<SSL_new(3)|SSL_new(3)>, L<SSL_pending(3)|SSL_pending(3)>, L<SSL_read(3)|SSL_read(3)>, L<SSL_rstate_string(3)|SSL_rstate_string(3)>, L<SSL_session_reused(3)|SSL_session_reused(3)>, L<SSL_set_bio(3)|SSL_set_bio(3)>, L<SSL_set_connect_state(3)|SSL_set_connect_state(3)>, L<SSL_set_fd(3)|SSL_set_fd(3)>, L<SSL_set_session(3)|SSL_set_session(3)>, L<SSL_set_shutdown(3)|SSL_set_shutdown(3)>, L<SSL_shutdown(3)|SSL_shutdown(3)>, L<SSL_state_string(3)|SSL_state_string(3)>, L<SSL_want(3)|SSL_want(3)>, L<SSL_write(3)|SSL_write(3)>, L<SSL_SESSION_free(3)|SSL_SESSION_free(3)>, L<SSL_SESSION_get_ex_new_index(3)|SSL_SESSION_get_ex_new_index(3)>, L<SSL_SESSION_get_time(3)|SSL_SESSION_get_time(3)>, L<d2i_SSL_SESSION(3)|d2i_SSL_SESSION(3)> =head1 HISTORY The L<ssl(3)|ssl(3)> document appeared in OpenSSL 0.9.2 =cut