Manual page for SSL_do_handshake().
authorLutz Jänicke <jaenicke@openssl.org>
Fri, 19 Jul 2002 11:05:50 +0000 (11:05 +0000)
committerLutz Jänicke <jaenicke@openssl.org>
Fri, 19 Jul 2002 11:05:50 +0000 (11:05 +0000)
Submitted by: Martin Sjögren <martin@strakt.com>
PR: 137

doc/ssl/SSL_accept.pod
doc/ssl/SSL_connect.pod
doc/ssl/SSL_do_handshake.pod [new file with mode: 0644]
doc/ssl/SSL_set_connect_state.pod
doc/ssl/ssl.pod

index ac6caf9..a673edb 100644 (file)
@@ -69,6 +69,7 @@ to find out the reason.
 L<SSL_get_error(3)|SSL_get_error(3)>, L<SSL_connect(3)|SSL_connect(3)>,
 L<SSL_shutdown(3)|SSL_shutdown(3)>, L<ssl(3)|ssl(3)>, L<bio(3)|bio(3)>,
 L<SSL_set_connect_state(3)|SSL_set_connect_state(3)>,
+L<SSL_do_handshake(3)|SSL_do_handshake(3)>,
 L<SSL_CTX_new(3)|SSL_CTX_new(3)>
 
 =cut
index 766f187..8426310 100644 (file)
@@ -66,6 +66,7 @@ to find out the reason.
 L<SSL_get_error(3)|SSL_get_error(3)>, L<SSL_accept(3)|SSL_accept(3)>,
 L<SSL_shutdown(3)|SSL_shutdown(3)>, L<ssl(3)|ssl(3)>, L<bio(3)|bio(3)>,
 L<SSL_set_connect_state(3)|SSL_set_connect_state(3)>,
+L<SSL_do_handshake(3)|SSL_do_handshake(3)>,
 L<SSL_CTX_new(3)|SSL_CTX_new(3)>
 
 =cut
diff --git a/doc/ssl/SSL_do_handshake.pod b/doc/ssl/SSL_do_handshake.pod
new file mode 100644 (file)
index 0000000..2435764
--- /dev/null
@@ -0,0 +1,75 @@
+=pod
+
+=head1 NAME
+
+SSL_do_handshake - perform a TLS/SSL handshake
+
+=head1 SYNOPSIS
+
+ #include <openssl/ssl.h>
+
+ int SSL_do_handshake(SSL *ssl);
+
+=head1 DESCRIPTION
+
+SSL_do_handshake() will wait for a SSL/TLS handshake to take place. If the
+connection is in client mode, the handshake will be started. The handshake
+routines may have to be explicitly set in advance using either
+L<SSL_set_connect_state(3)|SSL_set_connect_state(3)> or
+L<SSL_set_accept_state(3)|SSL_set_accept_state(3)>.
+
+=head1 NOTES
+
+The behaviour of SSL_do_handshake() depends on the underlying BIO.
+
+If the underlying BIO is B<blocking>, SSL_do_handshake() will only return
+once the handshake has been finished or an error occurred, except for SGC
+(Server Gated Cryptography). For SGC, SSL_do_handshake() may return with -1,
+but SSL_get_error() will yield B<SSL_ERROR_WANT_READ/WRITE> and
+SSL_do_handshake() should be called again.
+
+If the underlying BIO is B<non-blocking>, SSL_do_handshake() will also return
+when the underlying BIO could not satisfy the needs of SSL_do_handshake()
+to continue the handshake. In this case a call to SSL_get_error() with the
+return value of SSL_do_handshake() will yield B<SSL_ERROR_WANT_READ> or
+B<SSL_ERROR_WANT_WRITE>. The calling process then must repeat the call after
+taking appropriate action to satisfy the needs of SSL_do_handshake().
+The action depends on the underlying BIO. When using a non-blocking socket,
+nothing is to be done, but select() can be used to check for the required
+condition. When using a buffering BIO, like a BIO pair, data must be written
+into or retrieved out of the BIO before being able to continue.
+
+=head1 RETURN VALUES
+
+The following return values can occur:
+
+=over 4
+
+=item 1
+
+The TLS/SSL handshake was successfully completed, a TLS/SSL connection has been
+established.
+
+=item 0
+
+The TLS/SSL handshake was not successful but was shut down controlled and
+by the specifications of the TLS/SSL protocol. Call SSL_get_error() with the
+return value B<ret> to find out the reason.
+
+=item E<lt>0
+
+The TLS/SSL handshake was not successful because a fatal error occurred either
+at the protocol level or a connection failure occurred. The shutdown was
+not clean. It can also occur of action is need to continue the operation
+for non-blocking BIOs. Call SSL_get_error() with the return value B<ret>
+to find out the reason.
+
+=back
+
+=head1 SEE ALSO
+
+L<SSL_get_error(3)|SSL_get_error(3)>, L<SSL_connect(3)|SSL_connect(3)>,
+L<SSL_accept(3)|SSL_accept(3)>, L<ssl(3)|ssl(3)>, L<bio(3)|bio(3)>,
+L<SSL_set_connect_state(3)|SSL_set_connect_state(3)>
+
+=cut
index 7adf8ad..d88a057 100644 (file)
@@ -49,6 +49,7 @@ information.
 L<ssl(3)|ssl(3)>, L<SSL_new(3)|SSL_new(3)>, L<SSL_CTX_new(3)|SSL_CTX_new(3)>,
 L<SSL_connect(3)|SSL_connect(3)>, L<SSL_accept(3)|SSL_accept(3)>,
 L<SSL_write(3)|SSL_write(3)>, L<SSL_read(3)|SSL_read(3)>,
+L<SSL_do_handshake(3)|SSL_do_handshake(3)>,
 L<SSL_CTX_set_ssl_version(3)|SSL_CTX_set_ssl_version(3)>
 
 =cut
index d052558..1471e03 100644 (file)
@@ -693,6 +693,7 @@ 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)>,