=pod=head1 NAMEsess_id - SSL/TLS session handling utility=head1 SYNOPSISB<openssl> B<sess_id>[B<-inform PEM|DER>][B<-outform PEM|DER>][B<-in filename>][B<-out filename>][B<-text>][B<-noout>][B<-context ID>]=head1 DESCRIPTIONThe B<sess_id> process the encoded version of the SSL session structureand optionally prints out SSL session details (for example the SSL sessionmaster key) in human readable format. Since this is a diagnostic tool thatneeds some knowledge of the SSL protocol to use properly, most users willnot need to use it.=over 4=item B<-inform DER|PEM>This specifies the input format. The B<DER> option uses an ASN1 DER encodedformat containing session details. The precise format can vary from one versionto the next.  The B<PEM> form is the default format: it consists of the B<DER>format base64 encoded with additional header and footer lines.=item B<-outform DER|PEM>This specifies the output format, the options have the same meaning as the B<-inform> option.=item B<-in filename>This specifies the input filename to read session information from or standardinput by default.=item B<-out filename>This specifies the output filename to write session information to or standardoutput if this option is not specified.=item B<-text>prints out the various public or private key components inplain text in addition to the encoded version. =item B<-cert>if a certificate is present in the session it will be output using this option,if the B<-text> option is also present then it will be printed out in text form.=item B<-noout>this option prevents output of the encoded version of the session.=item B<-context ID>this option can set the session id so the output session information uses thesupplied ID. The ID can be any string of characters. This option wont normallybe used.=back=head1 OUTPUTTypical output: SSL-Session:     Protocol  : TLSv1     Cipher    : 0016     Session-ID: 871E62626C554CE95488823752CBD5F3673A3EF3DCE9C67BD916C809914B40ED     Session-ID-ctx: 01000000     Master-Key: A7CEFC571974BE02CAC305269DC59F76EA9F0B180CB6642697A68251F2D2BB57E51DBBB4C7885573192AE9AEE220FACD     Key-Arg   : None     Start Time: 948459261     Timeout   : 300 (sec)     Verify return code 0 (ok)Theses are described below in more detail.=over 4=item B<Protocol>this is the protocol in use TLSv1, SSLv3 or SSLv2.=item B<Cipher>the cipher used this is the actual raw SSL or TLS cipher code, see the SSLor TLS specifications for more information.=item B<Session-ID>the SSL session ID in hex format.=item B<Session-ID-ctx>the session ID context in hex format.=item B<Master-Key>this is the SSL session master key.=item B<Key-Arg>the key argument, this is only used in SSL v2.=item B<Start Time>this is the session start time represented as an integer in standard Unix format.=item B<Timeout>the timeout in seconds.=item B<Verify return code>this is the return code when an SSL client certificate is verified.=back=head1 NOTESThe PEM encoded session format uses the header and footer lines: -----BEGIN SSL SESSION PARAMETERS----- -----END SSL SESSION PARAMETERS-----Since the SSL session output contains the master key it is possible to read the contentsof an encrypted session using this information. Therefore appropriate security precautionsshould be taken if the information is being output by a "real" application. This ishowever strongly discouraged and should only be used for debugging purposes.=head1 BUGSThe cipher and start time should be printed out in human readable form.=head1 SEE ALSOL<ciphers(1)|ciphers(1)>, L<s_server(1)|s_server(1)>=cut