=head1 SYNOPSIS
B<openssl> B<s_client>
-[B<-connect> host:port>]
+[B<-connect host:port>]
[B<-verify depth>]
[B<-cert filename>]
[B<-key filename>]
[B<-pause>]
[B<-showcerts>]
[B<-debug>]
+[B<-msg>]
[B<-nbio_test>]
[B<-state>]
[B<-nbio>]
[B<-crlf>]
+[B<-ign_eof>]
[B<-quiet>]
[B<-ssl2>]
[B<-ssl3>]
[B<-no_tls1>]
[B<-bugs>]
[B<-cipher cipherlist>]
+[B<-starttls protocol>]
+[B<-engine id>]
+[B<-rand file(s)>]
=head1 DESCRIPTION
print extensive debugging information including a hex dump of all traffic.
+=item B<-msg>
+
+show all protocol messages with hex dump.
+
=item B<-nbio_test>
-tests non blocking I/O
+tests non-blocking I/O
=item B<-nbio>
-turns on non blocking I/O
+turns on non-blocking I/O
=item B<-crlf>
this option translated a line feed from the terminal into CR+LF as required
by some servers.
+=item B<-ign_eof>
+
+inhibit shutting down the connection when end of file is reached in the
+input.
+
=item B<-quiet>
-inhibit printing of session and certificate information.
+inhibit printing of session and certificate information. This implicitly
+turns on B<-ign_eof> as well.
=item B<-ssl2>, B<-ssl3>, B<-tls1>, B<-no_ssl2>, B<-no_ssl3>, B<-no_tls1>
=item B<-cipher cipherlist>
-this allows the cipher list sent by the client to be modified. See the
-B<ciphers> command for more information.
+this allows the cipher list sent by the client to be modified. Although
+the server determines which cipher suite is used it should take the first
+supported cipher in the list sent by the client. See the B<ciphers>
+command for more information.
+
+=item B<-starttls protocol>
+
+send the protocol-specific message(s) to switch to TLS for communication.
+B<protocol> is a keyword for the intended protocol. Currently, the only
+supported keywords are "smtp" and "pop3".
+
+=item B<-engine id>
+
+specifying an engine (by it's unique B<id> string) will cause B<s_client>
+to attempt to obtain a functional reference to the specified engine,
+thus initialising it if needed. The engine will then be set as the default
+for all available algorithms.
+
+=item B<-rand file(s)>
+
+a file or files containing random data used to seed the random number
+generator, or an EGD socket (see L<RAND_egd(3)|RAND_egd(3)>).
+Multiple files can be specified separated by a OS-dependent character.
+The separator is B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for
+all others.
=back
If a connection is established with an SSL server then any data received
from the server is displayed and any key presses will be sent to the
-server. If the line begins with an B<R> then the session will be
-renegotiated. If the line begins with a B<Q> the connection will be closed
-down.
+server. When used interactively (which means neither B<-quiet> nor B<-ign_eof>
+have been given), the session will be renegotiated if the line begins with an
+B<R>, and if the line begins with a B<Q> or if end of file is reached, the
+connection will be closed down.
=head1 NOTES
If the handshake fails then there are several possible causes, if it is
nothing obvious like no client certificate then the B<-bugs>, B<-ssl2>,
-B<-ssl3>, B<-tls1>, B<-no_ssl2>, B<-no_ssl3>, B<-no_tls1> can be tried
+B<-ssl3>, B<-tls1>, B<-no_ssl2>, B<-no_ssl3>, B<-no_tls1> options can be tried
in case it is a buggy server. In particular you should play with these
options B<before> submitting a bug report to an OpenSSL mailing list.
requests a certificate. By using B<s_client> the CA list can be viewed
and checked. However some servers only request client authentication
after a specific URL is requested. To obtain the list in this case it
-is necessary to use the B<-prexit> command and send an HTTP request
+is necessary to use the B<-prexit> option and send an HTTP request
for an appropriate page.
If a certificate is specified on the command line using the B<-cert>
=head1 SEE ALSO
-sess_id(1), s_server(1), ciphers(1)
+L<sess_id(1)|sess_id(1)>, L<s_server(1)|s_server(1)>, L<ciphers(1)|ciphers(1)>
=cut
projects / openssl.git / blobdiff