X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=doc%2Fssl%2Fssl.pod;h=6d78437159936ac508b7c85271f0a67987a4a172;hp=5f9ec8d9510d4ba95caca4d032abdaddc30a2e31;hb=e040a42e44b40f09ce485f66c9198456a3f8a457;hpb=bb075f883356589425b7e57f788c7498a83b0219

diff --git a/doc/ssl/ssl.pod b/doc/ssl/ssl.pod
index 5f9ec8d951..6d78437159 100644
--- a/doc/ssl/ssl.pod
+++ b/doc/ssl/ssl.pod
@@ -1,59 +1,39 @@
-
 =pod
 
+=for comment openssl_manual_section:7
+
 =head1 NAME
 
 SSL - OpenSSL SSL/TLS library
 
 =head1 SYNOPSIS
 
+See the individual manual pages for details.
+
 =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.
 
-=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
+Then an B<SSL_CTX> object is created as a framework to establish
+TLS/SSL enabled connections (see L<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)>, L<SSL_set_fd(3)> or
+L<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)> or L<SSL_connect(3)>
+respectively.
+L<SSL_read(3)> and L<SSL_write(3)> are used
+to read and write data on the TLS/SSL connection.
+L<SSL_shutdown(3)> can be used to shut down the
+TLS/SSL connection.
 
 =head1 DATA STRUCTURES
 
@@ -65,8 +45,8 @@ structures:
 =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>.
+methods/functions which implement the various protocol versions (SSLv3
+TLSv1, ...). It's needed to create an B<SSL_CTX>.
 
 =item B<SSL_CIPHER> (SSL Cipher)
 
@@ -83,7 +63,7 @@ B<SSL> structures which are later created for the connections.
 
 =item B<SSL_SESSION> (SSL Session)
 
-This is a structure containing the current SSL session details for a
+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)
@@ -95,57 +75,117 @@ 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 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>
+
+Unused. Present for backwards compatibility only.
+
+=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<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
+=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);
+=item const SSL_METHOD *B<TLS_method>(void);
+
+Constructor for the I<version-flexible> SSL_METHOD structure for clients,
+servers or both.
+See L<SSL_CTX_new(3)> for details.
+
+=item const SSL_METHOD *B<TLS_client_method>(void);
+
+Constructor for the I<version-flexible> SSL_METHOD structure for clients.
+
+=item const SSL_METHOD *B<TLS_server_method>(void);
+
+Constructor for the I<version-flexible> SSL_METHOD structure for servers.
+
+=item const SSL_METHOD *B<TLSv1_2_method>(void);
+
+Constructor for the TLSv1.2 SSL_METHOD structure for clients, servers or both.
+
+=item const SSL_METHOD *B<TLSv1_2_client_method>(void);
+
+Constructor for the TLSv1.2 SSL_METHOD structure for clients.
+
+=item const SSL_METHOD *B<TLSv1_2_server_method>(void);
+
+Constructor for the TLSv1.2 SSL_METHOD structure for servers.
+
+=item const SSL_METHOD *B<TLSv1_1_method>(void);
 
-Constructor for the SSLv2 SSL_METHOD structure for a dedicated client.
+Constructor for the TLSv1.1 SSL_METHOD structure for clients, servers or both.
 
-=item SSL_METHOD *B<SSLv2_server_method>(void);
+=item const SSL_METHOD *B<TLSv1_1_client_method>(void);
 
-Constructor for the SSLv2 SSL_METHOD structure for a dedicated server.
+Constructor for the TLSv1.1 SSL_METHOD structure for clients.
 
-=item SSL_METHOD *B<SSLv2_method>(void);
+=item const SSL_METHOD *B<TLSv1_1_server_method>(void);
 
-Constructor for the SSLv2 SSL_METHOD structure for combined client and server.
+Constructor for the TLSv1.1 SSL_METHOD structure for servers.
 
-=item SSL_METHOD *B<SSLv3_client_method>(void);
+=item const SSL_METHOD *B<TLSv1_method>(void);
 
-Constructor for the SSLv3 SSL_METHOD structure for a dedicated client.
+Constructor for the TLSv1 SSL_METHOD structure for clients, servers or both.
 
-=item SSL_METHOD *B<SSLv3_server_method>(void);
+=item const SSL_METHOD *B<TLSv1_client_method>(void);
 
-Constructor for the SSLv3 SSL_METHOD structure for a dedicated server.
+Constructor for the TLSv1 SSL_METHOD structure for clients.
 
-=item SSL_METHOD *B<SSLv3_method>(void);
+=item const SSL_METHOD *B<TLSv1_server_method>(void);
 
-Constructor for the SSLv3 SSL_METHOD structure for combined client and server.
+Constructor for the TLSv1 SSL_METHOD structure for servers.
 
-=item SSL_METHOD *B<TLSv1_client_method>(void);
+=item const SSL_METHOD *B<SSLv3_method>(void);
 
-Constructor for the TLSv1 SSL_METHOD structure for a dedicated client.
+Constructor for the SSLv3 SSL_METHOD structure for clients, servers or both.
 
-=item SSL_METHOD *B<TLSv1_server_method>(void);
+=item const SSL_METHOD *B<SSLv3_client_method>(void);
 
-Constructor for the TLSv1 SSL_METHOD structure for a dedicated server.
+Constructor for the SSLv3 SSL_METHOD structure for clients.
 
-=item SSL_METHOD *B<TLSv1_method>(void);
+=item const SSL_METHOD *B<SSLv3_server_method>(void);
 
-Constructor for the TLSv1 SSL_METHOD structure for combined client and server.
+Constructor for the SSLv3 SSL_METHOD structure for servers.
 
 =back
 
-=head2 DEALING WITH CIPHERS
+=head2 Dealing with Ciphers
 
 Here we document the various API functions which deal with the SSL/TLS
 ciphers defined in B<SSL_CIPHER> structures.
@@ -163,21 +203,21 @@ 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 char *B<SSL_CIPHER_get_name>(SSL_CIPHER *cipher);
+=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>
+strings defined by the I<SSL3_TXT_xxx> and I<TLS1_TXT_xxx>
 definitions in the header files.
 
-=item char *B<SSL_CIPHER_get_version>(SSL_CIPHER *cipher);
+=item const char *B<SSL_CIPHER_get_version>(SSL_CIPHER *cipher);
 
-Returns a string like "C<TLSv1/SSLv3>" or "C<SSLv2>" which indicates the
+Returns a string like "C<SSLv3>" or "C<TLSv1.2>" 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
+=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.
@@ -190,7 +230,7 @@ protocol context defined in the B<SSL_CTX> structure.
 
 =item int B<SSL_CTX_add_session>(SSL_CTX *ctx, SSL_SESSION *c);
 
-=item int B<SSL_CTX_check_private_key>(SSL_CTX *ctx);
+=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);
 
@@ -202,31 +242,37 @@ protocol context defined in the B<SSL_CTX> structure.
 
 =item X509_STORE *B<SSL_CTX_get_cert_store>(SSL_CTX *ctx);
 
-=item STACK *B<SSL_CTX_get_client_CA_list>(SSL_CTX *ctx);
+=item STACK *B<SSL_CTX_get_ciphers>(const 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>(SSL_CTX *s, int idx);
+=item void B<SSL_CTX_get_default_read_ahead>(SSL_CTX *ctx);
+
+=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>(SSL_CTX *ctx);
+=item int B<SSL_CTX_get_quiet_shutdown>(const SSL_CTX *ctx);
+
+=item void B<SSL_CTX_get_read_ahead>(SSL_CTX *ctx);
 
 =item int B<SSL_CTX_get_session_cache_mode>(SSL_CTX *ctx);
 
-=item long B<SSL_CTX_get_timeout>(SSL_CTX *ctx);
+=item long B<SSL_CTX_get_timeout>(const SSL_CTX *ctx);
 
-=item int (*B<SSL_CTX_get_verify_callback>(SSL_CTX *ctx))(int ok, X509_STORE_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 int B<SSL_CTX_load_verify_locations>(SSL_CTX *ctx, const char *CAfile, const char *CApath);
 
-=item long B<SSL_CTX_need_tmp_RSA>(SSL_CTX *ctx);
+=item SSL_CTX *B<SSL_CTX_new>(const SSL_METHOD *meth);
 
-=item SSL_CTX *B<SSL_CTX_new>(SSL_METHOD *meth);
+=item int SSL_CTX_up_ref(SSL_CTX *ctx);
 
 =item int B<SSL_CTX_remove_session>(SSL_CTX *ctx, SSL_SESSION *c);
 
@@ -260,7 +306,7 @@ protocol context defined in the B<SSL_CTX> structure.
 
 =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_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));
 
@@ -272,11 +318,11 @@ protocol context defined in the B<SSL_CTX> structure.
 
 =item LHASH *B<SSL_CTX_sessions>(SSL_CTX *ctx);
 
-=item void B<SSL_CTX_set_app_data>(SSL_CTX *ctx, void *arg);
+=item int 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)(SSL_CTX *), char *arg)
+=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);
 
@@ -290,42 +336,44 @@ protocol context defined in the B<SSL_CTX> structure.
 
 =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);
+Use the default paths to locate trusted CA certificates. There is one default
+directory path and one default file path. Both are set via this call.
 
-=item void B<SSL_CTX_set_info_callback>(SSL_CTX *ctx, void (*cb)(SSL *ssl, int cb, int ret));
+=item int B<SSL_CTX_set_default_verify_dir>(SSL_CTX *ctx)
 
-=item void B<SSL_CTX_set_options>(SSL_CTX *ctx, unsigned long op);
+Use the default directory path to locate trusted CA certificates.
 
-=item void B<SSL_CTX_set_quiet_shutdown>(SSL_CTX *ctx, int mode);
+=item int B<SSL_CTX_set_default_verify_file>(SSL_CTX *ctx)
 
-=item void B<SSL_CTX_set_session_cache_mode>(SSL_CTX *ctx, int mode);
+Use the file path to locate trusted CA certificates.
+
+=item int B<SSL_CTX_set_ex_data>(SSL_CTX *s, int idx, char *arg);
 
-=item int B<SSL_CTX_set_ssl_version>(SSL_CTX *ctx, SSL_METHOD *meth);
+=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_timeout>(SSL_CTX *ctx, long t);
+=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 long B<SSL_CTX_set_tmp_dh>(SSL_CTX* ctx, DH *dh);
+=item void B<SSL_CTX_set_msg_callback_arg>(SSL_CTX *ctx, void *arg);
 
-=item long B<SSL_CTX_set_tmp_dh_callback>(SSL_CTX *ctx, DH *(*cb)(void));
+=item unsigned long B<SSL_CTX_clear_options>(SSL_CTX *ctx, unsigned long op);
 
-=item long B<SSL_CTX_set_tmp_rsa>(SSL_CTX *ctx, RSA *rsa);
+=item unsigned long B<SSL_CTX_get_options>(SSL_CTX *ctx);
 
-=item SSL_CTX_set_tmp_rsa_callback
+=item unsigned long B<SSL_CTX_set_options>(SSL_CTX *ctx, unsigned long op);
 
-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>));>
+=item void B<SSL_CTX_set_quiet_shutdown>(SSL_CTX *ctx, int mode);
 
-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 void B<SSL_CTX_set_read_ahead>(SSL_CTX *ctx, int m);
 
-=item SSL_set_tmp_rsa_callback
+=item void B<SSL_CTX_set_session_cache_mode>(SSL_CTX *ctx, int mode);
 
-long B<SSL_set_tmp_rsa_callback>(SSL *ssl, RSA *(*cb)(SSL *ssl, int export, int keylength));
+=item int B<SSL_CTX_set_ssl_version>(SSL_CTX *ctx, const SSL_METHOD *meth);
 
-The same as L<"SSL_CTX_set_tmp_rsa_callback">, except it operates on an SSL
-session instead of a context.
+=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 void B<SSL_CTX_set_verify>(SSL_CTX *ctx, int mode, int (*cb);(void))
 
@@ -333,52 +381,63 @@ session instead of a context.
 
 =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_PrivateKey_file>(SSL_CTX *ctx, const 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_RSAPrivateKey_file>(SSL_CTX *ctx, const 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);
+=item int B<SSL_CTX_use_certificate_file>(SSL_CTX *ctx, const char *file, int type);
+
+=item X509 *B<SSL_CTX_get0_certificate>(const SSL_CTX *ctx);
+
+=item EVP_PKEY *B<SSL_CTX_get0_privatekey>(const SSL_CTX *ctx);
+
+=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));
+
+=item int B<SSL_CTX_use_psk_identity_hint>(SSL_CTX *ctx, const char *hint);
+
+=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));
+
 
 =back
 
-=head2 DEALING WITH SESSIONS
+=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>(SSL_SESSION *a, SSL_SESSION *b);
+=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>(SSL_SESSION *s, int idx);
+=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>(SSL_SESSION *s);
+=item long B<SSL_SESSION_get_time>(const SSL_SESSION *s);
 
-=item long B<SSL_SESSION_get_timeout>(SSL_SESSION *s);
+=item long B<SSL_SESSION_get_timeout>(const SSL_SESSION *s);
 
-=item unsigned long B<SSL_SESSION_hash>(SSL_SESSION *a);
+=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, SSL_SESSION *x);
+=item int B<SSL_SESSION_print>(BIO *bp, const SSL_SESSION *x);
 
-=item int B<SSL_SESSION_print_fp>(FILE *fp, 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_app_data>(SSL_SESSION *s, char *a);
 
 =item int B<SSL_SESSION_set_ex_data>(SSL_SESSION *s, int idx, char *arg);
 
@@ -388,7 +447,7 @@ sessions defined in the B<SSL_SESSION> structures.
 
 =back
 
-=head2 DEALING WITH CONNECTIONS
+=head2 Dealing with Connections
 
 Here we document the various API functions which deal with the SSL/TLS
 connection defined in the B<SSL> structure.
@@ -411,7 +470,7 @@ connection defined in the B<SSL> structure.
 
 =item char *B<SSL_alert_type_string_long>(int value);
 
-=item int B<SSL_check_private_key>(SSL *ssl);
+=item int B<SSL_check_private_key>(const SSL *ssl);
 
 =item void B<SSL_clear>(SSL *ssl);
 
@@ -419,7 +478,10 @@ connection defined in the B<SSL> structure.
 
 =item int B<SSL_connect>(SSL *ssl);
 
-=item void B<SSL_copy_session_id>(SSL *t, SSL *f);
+=item int B<SSL_copy_session_id>(SSL *t, const SSL *f);
+
+Sets the session details for B<t> to be the same as in B<f>. Returns 1 on
+success or 0 on failure.
 
 =item long B<SSL_ctrl>(SSL *ssl, int cmd, long larg, char *parg);
 
@@ -427,81 +489,102 @@ connection defined in the B<SSL> structure.
 
 =item SSL *B<SSL_dup>(SSL *ssl);
 
+SSL_dup() allows applications to configure an SSL handle for use
+in multiple SSL connections, and then duplicate it prior to initiating
+each connection with the duplicated handle.
+Use of SSL_dup() avoids the need to repeat the configuration of the
+handles for each connection.
+This is used internally by L<BIO_s_accept(3)> to construct
+per-connection SSL handles after L<accept(2)>.
+
+For SSL_dup() to work, the connection MUST be in its initial state
+and MUST NOT have not yet have started the SSL handshake.
+For connections that are not in their initial state SSL_dup() just
+increments an internal reference count and returns the I<same>
+handle.
+It may be possible to use L<SSL_clear(3)> to recycle an SSL handle
+that is not in its initial state for re-use, but this is best
+avoided.
+Instead, save and restore the session, if desired, and construct a
+fresh handle for each connection.
+
 =item STACK *B<SSL_dup_CA_list>(STACK *sk);
 
 =item void B<SSL_free>(SSL *ssl);
 
-=item SSL_CTX *B<SSL_get_SSL_CTX>(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>(SSL *ssl);
+=item X509 *B<SSL_get_certificate>(const SSL *ssl);
 
-=item SSL_CIPHER *B<SSL_get_cipher>(SSL *ssl);
+=item const char *B<SSL_get_cipher>(const SSL *ssl);
 
-=item int B<SSL_get_cipher_bits>(SSL *ssl, int *alg_bits);
+=item int B<SSL_is_dtls>(const SSL *ssl);
 
-=item char *B<SSL_get_cipher_list>(SSL *ssl, int n);
+=item int B<SSL_get_cipher_bits>(const SSL *ssl, int *alg_bits);
 
-=item char *B<SSL_get_cipher_name>(SSL *ssl);
+=item char *B<SSL_get_cipher_list>(const SSL *ssl, int n);
 
-=item char *B<SSL_get_cipher_version>(SSL *ssl);
+=item char *B<SSL_get_cipher_name>(const SSL *ssl);
 
-=item STACK *B<SSL_get_ciphers>(SSL *ssl);
+=item char *B<SSL_get_cipher_version>(const SSL *ssl);
 
-=item STACK *B<SSL_get_client_CA_list>(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>(SSL *ssl);
+=item long B<SSL_get_default_timeout>(const SSL *ssl);
 
-=item int B<SSL_get_error>(SSL *ssl, int i);
+=item int B<SSL_get_error>(const SSL *ssl, int i);
 
-=item char *B<SSL_get_ex_data>(SSL *ssl, int idx);
+=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>(SSL *ssl);
+=item int B<SSL_get_fd>(const SSL *ssl);
 
-=item void (*B<SSL_get_info_callback>(SSL *ssl);)(void)
+=item void (*B<SSL_get_info_callback>(const SSL *ssl);)()
 
-=item STACK *B<SSL_get_peer_cert_chain>(SSL *ssl);
+=item STACK *B<SSL_get_peer_cert_chain>(const SSL *ssl);
 
-=item X509 *B<SSL_get_peer_certificate>(SSL *ssl);
+=item X509 *B<SSL_get_peer_certificate>(const SSL *ssl);
 
-=item EVP_PKEY *B<SSL_get_privatekey>(SSL *ssl);
+=item EVP_PKEY *B<SSL_get_privatekey>(const SSL *ssl);
 
-=item int B<SSL_get_quiet_shutdown>(SSL *ssl);
+=item int B<SSL_get_quiet_shutdown>(const SSL *ssl);
 
-=item BIO *B<SSL_get_rbio>(SSL *ssl);
+=item BIO *B<SSL_get_rbio>(const SSL *ssl);
 
-=item int B<SSL_get_read_ahead>(SSL *ssl);
+=item int B<SSL_get_read_ahead>(const SSL *ssl);
 
-=item SSL_SESSION *B<SSL_get_session>(SSL *ssl);
+=item SSL_SESSION *B<SSL_get_session>(const SSL *ssl);
 
-=item char *B<SSL_get_shared_ciphers>(SSL *ssl, char *buf, int len);
+=item char *B<SSL_get_shared_ciphers>(const SSL *ssl, char *buf, int len);
 
-=item int B<SSL_get_shutdown>(SSL *ssl);
+=item int B<SSL_get_shutdown>(const SSL *ssl);
 
-=item SSL_METHOD *B<SSL_get_ssl_method>(SSL *ssl);
+=item const SSL_METHOD *B<SSL_get_ssl_method>(SSL *ssl);
 
-=item int B<SSL_get_state>(SSL *ssl);
+=item int B<SSL_get_state>(const SSL *ssl);
 
-=item long B<SSL_get_time>(SSL *ssl);
+=item long B<SSL_get_time>(const SSL *ssl);
 
-=item long B<SSL_get_timeout>(SSL *ssl);
+=item long B<SSL_get_timeout>(const SSL *ssl);
 
-=item int (*B<SSL_get_verify_callback>(SSL *ssl);)(void)
+=item int (*B<SSL_get_verify_callback>(const SSL *ssl))(int, X509_STORE_CTX *)
 
-=item int B<SSL_get_verify_mode>(SSL *ssl);
+=item int B<SSL_get_verify_mode>(const SSL *ssl);
 
-=item long B<SSL_get_verify_result>(SSL *ssl);
+=item long B<SSL_get_verify_result>(const SSL *ssl);
 
-=item char *B<SSL_get_version>(SSL *ssl);
+=item char *B<SSL_get_version>(const SSL *ssl);
 
-=item BIO *B<SSL_get_wbio>(SSL *ssl);
+=item BIO *B<SSL_get_wbio>(const SSL *ssl);
 
 =item int B<SSL_in_accept_init>(SSL *ssl);
 
@@ -513,19 +596,19 @@ connection defined in the B<SSL> structure.
 
 =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 STACK *B<SSL_load_client_CA_file>(const char *file);
 
 =item SSL *B<SSL_new>(SSL_CTX *ctx);
 
+=item int SSL_up_ref(SSL *s);
+
 =item long B<SSL_num_renegotiations>(SSL *ssl);
 
-=item int B<SSL_peek>(SSL *ssl, char *buf, int num);
+=item int B<SSL_peek>(SSL *ssl, void *buf, int num);
 
-=item int B<SSL_pending>(SSL *ssl);
+=item int B<SSL_pending>(const SSL *ssl);
 
-=item int B<SSL_read>(SSL *ssl, char *buf, int num);
+=item int B<SSL_read>(SSL *ssl, void *buf, int num);
 
 =item int B<SSL_renegotiate>(SSL *ssl);
 
@@ -553,7 +636,15 @@ connection defined in the B<SSL> structure.
 
 =item void B<SSL_set_info_callback>(SSL *ssl, void (*cb);(void))
 
-=item void B<SSL_set_options>(SSL *ssl, unsigned long op);
+=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 unsigned long B<SSL_clear_options>(SSL *ssl, unsigned long op);
+
+=item unsigned long B<SSL_get_options>(SSL *ssl);
+
+=item unsigned long B<SSL_set_options>(SSL *ssl, unsigned long op);
 
 =item void B<SSL_set_quiet_shutdown>(SSL *ssl, int mode);
 
@@ -565,7 +656,7 @@ connection defined in the B<SSL> structure.
 
 =item void B<SSL_set_shutdown>(SSL *ssl, int mode);
 
-=item int B<SSL_set_ssl_method>(SSL *ssl, SSL_METHOD *meth);
+=item int B<SSL_set_ssl_method>(SSL *ssl, const SSL_METHOD *meth);
 
 =item void B<SSL_set_time>(SSL *ssl, long t);
 
@@ -579,11 +670,13 @@ connection defined in the B<SSL> structure.
 
 =item int B<SSL_shutdown>(SSL *ssl);
 
-=item int B<SSL_state>(SSL *ssl);
+=item OSSL_HANDSHAKE_STATE B<SSL_get_state>(const SSL *ssl);
+
+Returns the current handshake state.
 
-=item char *B<SSL_state_string>(SSL *ssl);
+=item char *B<SSL_state_string>(const SSL *ssl);
 
-=item char *B<SSL_state_string_long>(SSL *ssl);
+=item char *B<SSL_state_string_long>(const SSL *ssl);
 
 =item long B<SSL_total_renegotiations>(SSL *ssl);
 
@@ -591,43 +684,142 @@ connection defined in the B<SSL> structure.
 
 =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_PrivateKey_file>(SSL *ssl, const 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_RSAPrivateKey_file>(SSL *ssl, const 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_use_certificate_file>(SSL *ssl, const 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_version>(SSL *ssl);
+=item int B<SSL_want_write>(const SSL *ssl);
 
-=item int B<SSL_want>(SSL *ssl);
+=item int B<SSL_want_x509_lookup>(const SSL *ssl);
 
-=item int B<SSL_want_nothing>(SSL *ssl);
+=item int B<SSL_write>(SSL *ssl, const void *buf, int num);
 
-=item int B<SSL_want_read>(SSL *ssl);
+=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));
 
-=item int B<SSL_want_write>(SSL *ssl);
+=item int B<SSL_use_psk_identity_hint>(SSL *ssl, const char *hint);
 
-=item int B<SSL_want_x509_lookup>(s);
+=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));
 
-=item int B<SSL_write>(SSL *ssl, char *buf, int num);
+=item const char *B<SSL_get_psk_identity_hint>(SSL *ssl);
+
+=item const char *B<SSL_get_psk_identity>(SSL *ssl);
 
 =back
 
+=head1 RETURN VALUES
+
+See the individual manual pages for details.
+
 =head1 SEE ALSO
 
-L<openssl(1)|openssl(1)>, L<crypto(3)|crypto(3)>
+L<openssl(1)>, L<crypto(3)>,
+L<CRYPTO_get_ex_new_index(3)>,
+L<SSL_accept(3)>, L<SSL_clear(3)>,
+L<SSL_connect(3)>,
+L<SSL_CIPHER_get_name(3)>,
+L<SSL_COMP_add_compression_method(3)>,
+L<SSL_CTX_add_extra_chain_cert(3)>,
+L<SSL_CTX_add_session(3)>,
+L<SSL_CTX_ctrl(3)>,
+L<SSL_CTX_flush_sessions(3)>,
+L<SSL_CTX_get_verify_mode(3)>,
+L<SSL_CTX_load_verify_locations(3)>
+L<SSL_CTX_new(3)>,
+L<SSL_CTX_sess_number(3)>,
+L<SSL_CTX_sess_set_cache_size(3)>,
+L<SSL_CTX_sess_set_get_cb(3)>,
+L<SSL_CTX_sessions(3)>,
+L<SSL_CTX_set_cert_store(3)>,
+L<SSL_CTX_set_cert_verify_callback(3)>,
+L<SSL_CTX_set_cipher_list(3)>,
+L<SSL_CTX_set_client_CA_list(3)>,
+L<SSL_CTX_set_client_cert_cb(3)>,
+L<SSL_CTX_set_default_passwd_cb(3)>,
+L<SSL_CTX_set_generate_session_id(3)>,
+L<SSL_CTX_set_info_callback(3)>,
+L<SSL_CTX_set_max_cert_list(3)>,
+L<SSL_CTX_set_mode(3)>,
+L<SSL_CTX_set_msg_callback(3)>,
+L<SSL_CTX_set_options(3)>,
+L<SSL_CTX_set_quiet_shutdown(3)>,
+L<SSL_CTX_set_read_ahead(3)>,
+L<SSL_CTX_set_session_cache_mode(3)>,
+L<SSL_CTX_set_session_id_context(3)>,
+L<SSL_CTX_set_ssl_version(3)>,
+L<SSL_CTX_set_timeout(3)>,
+L<SSL_CTX_set_tmp_dh_callback(3)>,
+L<SSL_CTX_set_verify(3)>,
+L<SSL_CTX_use_certificate(3)>,
+L<SSL_alert_type_string(3)>,
+L<SSL_do_handshake(3)>,
+L<SSL_get_SSL_CTX(3)>,
+L<SSL_get_ciphers(3)>,
+L<SSL_get_client_CA_list(3)>,
+L<SSL_get_default_timeout(3)>,
+L<SSL_get_error(3)>,
+L<SSL_get_ex_data_X509_STORE_CTX_idx(3)>,
+L<SSL_get_fd(3)>,
+L<SSL_get_peer_cert_chain(3)>,
+L<SSL_get_rbio(3)>,
+L<SSL_get_session(3)>,
+L<SSL_get_verify_result(3)>,
+L<SSL_get_version(3)>,
+L<SSL_load_client_CA_file(3)>,
+L<SSL_new(3)>,
+L<SSL_pending(3)>,
+L<SSL_read(3)>,
+L<SSL_rstate_string(3)>,
+L<SSL_session_reused(3)>,
+L<SSL_set_bio(3)>,
+L<SSL_set_connect_state(3)>,
+L<SSL_set_fd(3)>,
+L<SSL_set_session(3)>,
+L<SSL_set_shutdown(3)>,
+L<SSL_shutdown(3)>,
+L<SSL_state_string(3)>,
+L<SSL_want(3)>,
+L<SSL_write(3)>,
+L<SSL_SESSION_free(3)>,
+L<SSL_SESSION_get_time(3)>,
+L<d2i_SSL_SESSION(3)>,
+L<SSL_CTX_set_psk_client_callback(3)>,
+L<SSL_CTX_use_psk_identity_hint(3)>,
+L<SSL_get_psk_identity(3)>,
+L<DTLSv1_listen(3)>
 
 =head1 HISTORY
 
-The L<ssl(3)|ssl(3)> document appeared in OpenSSL 0.9.2
+B<SSLv2_client_method>, B<SSLv2_server_method> and B<SSLv2_method> where removed
+in OpenSSL 1.1.0.
 
-=cut
+The return type of B<SSL_copy_session_id> was changed from void to int in
+OpenSSL 1.1.0.
 
+=head1 COPYRIGHT
+
+Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
+
+Licensed under the OpenSSL license (the "License").  You may not use
+this file except in compliance with the License.  You can obtain a copy
+in the file LICENSE in the source distribution or at
+L<https://www.openssl.org/source/license.html>.
+
+=cut