sess_id(1ssl)sess_id(1ssl)NAMEsess_id - SSL/TLS session handling utility
SYNOPSIS
openssl sess_id [-inform PEM | DER] [-outform PEM | DER] [-infilename]
[-outfilename] [-text] [-noout] [-contextID]
OPTIONS
Specifies the input format. The DER option uses an ASN1 DER encoded
format containing session details. The precise format can vary from one
version to the next. The PEM form is the default format. It consists
of the DER format base64 encoded with additional header and footer
lines. Specifies the output format. The options have the same meaning
as the -inform option. Specifies the input filename to read session
information from or standard input by default. Specifies the output
filename to write session information to or standard output if this
option is not specified. Prints out the various public or private key
components in plain text in addition to the encoded version. If a cer‐
tificate is present in the session it will be output using this option.
If the -text option is also present then it will be printed out in text
form. Prevents output of the encoded version of the session. Sets the
session id so the output session information uses the supplied ID. The
ID can be any string of characters. This option usually is not used.
DESCRIPTION
The sess_id processes the encoded version of the SSL session structure
and optionally prints out SSL session details, such as 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.
NOTES
The PEM encoded session format uses the following 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.
RESTRICTIONS
The cipher and start time should be printed out in human readable form.
EXAMPLES
An example of typical output follows:
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)
These are described below in more detail. The protocol in use - TLSv1,
SSLv3 or SSLv2. The cipher used. This is the actual raw SSL or TLS
cipher code. See the SSL or TLS specifications for more information.
The SSL session ID in hex format. The session ID context in hex for‐
mat. The SSL session master key. The key argument. This is only used
in SSL v2. The session start time, represented as an integer in stan‐
dard UNIX format. The timeout in seconds. The return code when an SSL
client certificate is verified.
SEE ALSO
Commands: ciphers(1ssl), s_server(1ssl)sess_id(1ssl)