SESS_ID 1 2000-07-16 0.9.9-dev OpenSSL

NAME

sess_id - SSL/TLS session handling utility

LIBRARY

libcrypto, -lcrypto

SYNOPSIS

ooppeennssssll sseessss__iidd [--iinnffoorrmm PPEEMM||DDEERR] [--oouuttffoorrmm PPEEMM||DDEERR] [--iinn ffiilleennaammee] [--oouutt ffiilleennaammee] [--tteexxtt] [--nnoooouutt] [--ccoonntteexxtt IIDD]

DESCRIPTION

The sseessss__iidd process the encoded version of the SSL session structure and optionally prints out SSL session details (for example the SSL session master key) in human readable format. Since this is a diagnostic tool that needs some knowledge of the SSL protocol to use properly, most users will not need to use it.
--iinnffoorrmm DDEERR||PPEEMM This specifies the input format. The DDEERR option uses an ASN1 DER encoded
format containing session details. The precise format can vary from one version to the next. The PPEEMM form is the default format: it consists of the DDEERR format base64 encoded with additional header and footer lines.
--oouuttffoorrmm DDEERR||PPEEMM This specifies the output format, the options have the same meaning as the
--iinnffoorrmm option.
--iinn ffiilleennaammee This specifies the input filename to read session information from or standard
input by default.
--oouutt ffiilleennaammee This specifies the output filename to write session information to or standard
output if this option is not specified.
--tteexxtt prints out the various public or private key components in
plain text in addition to the encoded version.
--cceerrtt if a certificate is present in the session it will be output using this option,
if the --tteexxtt option is also present then it will be printed out in text form.
--nnoooouutt this option prevents output of the encoded version of the session.
--ccoonntteexxtt IIDD this option can set the session id so the output session information uses the
supplied ID. The ID can be any string of characters. This option wont normally be used.

OUTPUT

Typical 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.

PPrroottooccooll this is the protocol in use TLSv1, SSLv3 or SSLv2.
CCiipphheerr the cipher used this is the actual raw SSL or TLS cipher code, see the SSL
or TLS specifications for more information.
SSeessssiioonn--IIDD the SSL session ID in hex format.
SSeessssiioonn--IIDD--ccttxx the session ID context in hex format.
MMaasstteerr--KKeeyy this is the SSL session master key.
KKeeyy--AArrgg the key argument, this is only used in SSL v2.
SSttaarrtt TTiimmee this is the session start time represented as an integer in standard Unix format.
TTiimmeeoouutt the timeout in seconds.
VVeerriiffyy rreettuurrnn ccooddee this is the return code when an SSL client certificate is verified.

NOTES

The 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 contents of an encrypted session using this information. Therefore appropriate security precautions should be taken if the information is being output by a "real" application. This is however strongly discouraged and should only be used for debugging purposes.

BUGS

The cipher and start time should be printed out in human readable form.

SEE ALSO

_o_p_e_n_s_s_l___c_i_p_h_e_r_s(1), _o_p_e_n_s_s_l___s___s_e_r_v_e_r(1)