1 2=pod 3 4=head1 NAME 5 6sess_id - SSL/TLS session handling utility 7 8=head1 SYNOPSIS 9 10B<openssl> B<sess_id> 11[B<-inform PEM|DER>] 12[B<-outform PEM|DER>] 13[B<-in filename>] 14[B<-out filename>] 15[B<-text>] 16[B<-noout>] 17[B<-context ID>] 18 19=head1 DESCRIPTION 20 21The B<sess_id> process the encoded version of the SSL session structure 22and optionally prints out SSL session details (for example the SSL session 23master key) in human readable format. Since this is a diagnostic tool that 24needs some knowledge of the SSL protocol to use properly, most users will 25not need to use it. 26 27=over 4 28 29=item B<-inform DER|PEM> 30 31This specifies the input format. The B<DER> option uses an ASN1 DER encoded 32format containing session details. The precise format can vary from one version 33to the next. The B<PEM> form is the default format: it consists of the B<DER> 34format base64 encoded with additional header and footer lines. 35 36=item B<-outform DER|PEM> 37 38This specifies the output format, the options have the same meaning as the 39B<-inform> option. 40 41=item B<-in filename> 42 43This specifies the input filename to read session information from or standard 44input by default. 45 46=item B<-out filename> 47 48This specifies the output filename to write session information to or standard 49output if this option is not specified. 50 51=item B<-text> 52 53prints out the various public or private key components in 54plain text in addition to the encoded version. 55 56=item B<-cert> 57 58if a certificate is present in the session it will be output using this option, 59if the B<-text> option is also present then it will be printed out in text form. 60 61=item B<-noout> 62 63this option prevents output of the encoded version of the session. 64 65=item B<-context ID> 66 67this option can set the session id so the output session information uses the 68supplied ID. The ID can be any string of characters. This option wont normally 69be used. 70 71=back 72 73=head1 OUTPUT 74 75Typical output: 76 77 SSL-Session: 78 Protocol : TLSv1 79 Cipher : 0016 80 Session-ID: 871E62626C554CE95488823752CBD5F3673A3EF3DCE9C67BD916C809914B40ED 81 Session-ID-ctx: 01000000 82 Master-Key: A7CEFC571974BE02CAC305269DC59F76EA9F0B180CB6642697A68251F2D2BB57E51DBBB4C7885573192AE9AEE220FACD 83 Key-Arg : None 84 Start Time: 948459261 85 Timeout : 300 (sec) 86 Verify return code 0 (ok) 87 88Theses are described below in more detail. 89 90=over 4 91 92=item B<Protocol> 93 94this is the protocol in use TLSv1, SSLv3 or SSLv2. 95 96=item B<Cipher> 97 98the cipher used this is the actual raw SSL or TLS cipher code, see the SSL 99or TLS specifications for more information. 100 101=item B<Session-ID> 102 103the SSL session ID in hex format. 104 105=item B<Session-ID-ctx> 106 107the session ID context in hex format. 108 109=item B<Master-Key> 110 111this is the SSL session master key. 112 113=item B<Key-Arg> 114 115the key argument, this is only used in SSL v2. 116 117=item B<Start Time> 118 119this is the session start time represented as an integer in standard Unix format. 120 121=item B<Timeout> 122 123the timeout in seconds. 124 125=item B<Verify return code> 126 127this is the return code when an SSL client certificate is verified. 128 129=back 130 131=head1 NOTES 132 133The PEM encoded session format uses the header and footer lines: 134 135 -----BEGIN SSL SESSION PARAMETERS----- 136 -----END SSL SESSION PARAMETERS----- 137 138Since the SSL session output contains the master key it is possible to read the contents 139of an encrypted session using this information. Therefore appropriate security precautions 140should be taken if the information is being output by a "real" application. This is 141however strongly discouraged and should only be used for debugging purposes. 142 143=head1 BUGS 144 145The cipher and start time should be printed out in human readable form. 146 147=head1 SEE ALSO 148 149L<ciphers(1)|ciphers(1)>, L<s_server(1)|s_server(1)> 150 151=cut 152