Man page for s_server.

doc/man/s_client.pod

@@ -192,7 +192,7 @@ B<-showcerts> option can be used to show the whole chain.
 =head1 BUGS
 
 Because this program has a lot of options and also because some of
-the techniques used are rather old the C source of s_client is rather
+the techniques used are rather old, the C source of s_client is rather
 hard to read and not a model of how things should be done. A typical
 SSL client program would be much simpler.
 

doc/man/s_server.pod

@@ -0,0 +1,226 @@
+
+=pod
+
+=head1 NAME
+
+s_server - SSL/TLS server program
+
+=head1 SYNOPSIS
+
+B<openssl> B<s_client>
+[B<-accept port>]
+[B<-context id>]
+[B<-verify depth>]
+[B<-Verify depth>]
+[B<-cert filename>]
+[B<-key keyfile>]
+[B<-dcert filename>]
+[B<-dkey keyfile>]
+[B<-dhparam filename>]
+[B<-nbio>]
+[B<-nbio_test>]
+[B<-crlf>]
+[B<-debug>]
+[B<-state>]
+[B<-CApath directory>]
+[B<-CAfile filename>]
+[B<-nocert>]
+[B<-cipher cipherlist>]
+[B<-quiet>]
+[B<-no_tmp_rsa>]
+[B<-ssl2>]
+[B<-ssl3>]
+[B<-tls1>]
+[B<-no_ssl2>]
+[B<-no_ssl3>]
+[B<-no_tls1>]
+[B<-no_dhe>]
+[B<-bugs>]
+[B<-www>]
+[B<-WWW>]
+
+=head1 DESCRIPTION
+
+The B<s_server> command implements a generic SSL/TLS server which listens
+for connections on a given port using SSL/TLS.
+
+=head1 OPTIONS
+
+=over 4
+
+=item B<-accept port>
+
+the TCP port to listen on for connections. If not specified 4433 is used.
+
+=item B<-context id>
+
+sets the SSL context id. If a client certificate is being requested then
+this option must be set. It can be given any string value.
+
+=item B<-cert certname>
+
+The certificate to use, most servers cipher suites require the use of a
+certificate and some require a certificate with a certain public key type:
+for example the DSS cipher suites require a certificate containing a DSS
+(DSA) key. If not specified then the filename "server.pem" will be used.
+
+=item B<-key keyfile>
+
+The private key to use. If not specified then the certificate file will
+be used.
+
+=item B<-dcert filename>, B<-dkey keyname>
+
+specify an additional certificate and private key, these behave in the
+same manner as the B<-cert> and B<-key> options except there is no default
+if they are not specified (no additional certificate and key is used). As
+noted above some cipher suites require a certificate containing a key of
+a certain type. Some cipher suites need a certificate carrying an RSA key
+and some a DSS (DSA) key. By using RSA and DSS certificates and keys
+a server can support clients which only support RSA or DSS cipher suites
+by using an appropriate certificate.
+
+=item B<-nocert>
+
+if this option is set then no certificate is used. This restricts the
+cipher suites available to the anonymous ones (currently just anonymous
+DH).
+
+=item B<-dhparam filename>
+
+the DH parameter file to use. The ephemeral DH cipher suites generate keys
+using a set of DH parameters. If not specified then an attempt is made to
+load the parameters from the server certificate file. If this fails then
+a static set of parameters hard coded into the s_server program will be used.
+
+=item B<-nodhe>
+
+if this option is set then no DH parameters will be loaded effectively
+disabling the ephemeral DH cipher suites.
+
+=item B<-no_tmp_rsa>
+
+certain export cipher suites sometimes use a temporary RSA key, this option
+disables temporary RSA key generation.
+
+=item B<-verify depth>, B<-Verify depth>
+
+The verify depth to use. This specifies the maximum length of the
+client certificate chain and makes the server request a certificate from
+the client. With the B<-verify> option a certificate is requested but the
+client does not have to send one, with the B<-Verify> option the client
+must supply a certificate or an error occurs.
+
+=item B<-CApath directory>
+
+The directory to use for client certificate verification. This directory
+must be in "hash format", see B<verify> for more information. These are
+also used when building the server certificate chain.
+
+=item B<-CAfile file>
+
+A file containing trusted certificates to use during client authentication
+and to use when attempting to build the server certificate chain. The list
+is also used in the list of acceptable client CAs passed to the client when
+a certificate is requested.
+
+=item B<-state>
+
+prints out the SSL session states.
+
+=item B<-debug>
+
+print extensive debugging information including a hex dump of all traffic.
+
+=item B<-nbio_test>
+
+tests non blocking I/O
+
+=item B<-nbio>
+
+turns on non blocking I/O
+
+=item B<-crlf>
+
+this option translated a line feed from the terminal into CR+LF.
+
+=item B<-quiet>
+
+inhibit printing of session and certificate information.
+
+=item B<-ssl2>, B<-ssl3>, B<-tls1>, B<-no_ssl2>, B<-no_ssl3>, B<-no_tls1>
+
+these options disable the use of certain SSL or TLS protocols. By default
+the initial handshake uses a method which should be compatible with all
+servers and permit them to use SSL v3, SSL v2 or TLS as appropriate.
+
+=item B<-bugs>
+
+there are several known bug in SSL and TLS implementations. Adding this
+option enables various workarounds.
+
+=item B<-cipher cipherlist>
+
+this allows the cipher list sent by the client to be modified. See the
+B<ciphers> command for more information.
+
+=item B<-www>
+
+sends a status message back to the client when it connects. This includes
+lots of information about the ciphers used and various session parameters.
+The output is in HTML format so this option will normally be used with a
+web browser.
+
+=item B<-WWW>
+
+emulates a simple web server. Pages will be resolved relative to the
+current directory, for example if the URL https://myhost/page.html is
+requested the file ./page.html will be loaded.
+
+=back
+
+=head1 CONNECTED COMMANDS
+
+If a connection request is established with an SSL client and neither the
+B<-www> nor the B<-WWW> option has been used 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.
+
+=head1 NOTES
+
+B<s_server> can be used to debug SSL clients. To accept connections from
+a web browser the command:
+
+ openssl s_server -accept 443 -www
+
+can be used for example.
+
+Most web browsers (in particular Netscape and MSIE) only support RSA cipher
+suites, so they cannot connect to servers which don't use a certificate
+carrying an RSA key or a version of OpenSSL with RSA disabled.
+
+Although specifying an empty list of CAs when requesting a client certificate
+is strictly speaking a protocol violation, some SSL clients assume any CA is
+acceptable. This is useful for debugging purposes.
+
+The session parameters can printed out using the B<sess_id> program.
+
+=head1 BUGS
+
+Because this program has a lot of options and also because some of
+the techniques used are rather old, the C source of s_server is rather
+hard to read and not a model of how things should be done. A typical
+SSL server program would be much simpler.
+
+The output of common ciphers is wrong: it just gives the list of ciphers that
+OpenSSL recognises and the client supports.
+
+There should be a way for the B<s_server> program to print out details of any
+unknown cipher suites a client says it supports.
+
+=head1 SEE ALSO
+
+sess_id(1), s_client(1), ciphers(1)
+
+=cut