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)