1SESS_ID(1)                          OpenSSL                         SESS_ID(1)
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NAME

6       sess_id - SSL/TLS session handling utility
7

SYNOPSIS

9       openssl sess_id [-inform PEM|DER] [-outform PEM|DER] [-in filename]
10       [-out filename] [-text] [-noout] [-context ID]
11

DESCRIPTION

13       The sess_id process the encoded version of the SSL session structure
14       and optionally prints out SSL session details (for example the SSL
15       session master key) in human readable format. Since this is a
16       diagnostic tool that needs some knowledge of the SSL protocol to use
17       properly, most users will not need to use it.
18
19       -inform DER|PEM
20           This specifies the input format. The DER option uses an ASN1 DER
21           encoded format containing session details. The precise format can
22           vary from one version to the next.  The PEM form is the default
23           format: it consists of the DER format base64 encoded with
24           additional header and footer lines.
25
26       -outform DER|PEM
27           This specifies the output format, the options have the same meaning
28           as the -inform option.
29
30       -in filename
31           This specifies the input filename to read session information from
32           or standard input by default.
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34       -out filename
35           This specifies the output filename to write session information to
36           or standard output if this option is not specified.
37
38       -text
39           prints out the various public or private key components in plain
40           text in addition to the encoded version.
41
42       -cert
43           if a certificate is present in the session it will be output using
44           this option, if the -text option is also present then it will be
45           printed out in text form.
46
47       -noout
48           this option prevents output of the encoded version of the session.
49
50       -context ID
51           this option can set the session id so the output session
52           information uses the supplied ID. The ID can be any string of
53           characters. This option wont normally be used.
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OUTPUT

56       Typical output:
57
58        SSL-Session:
59            Protocol  : TLSv1
60            Cipher    : 0016
61            Session-ID: 871E62626C554CE95488823752CBD5F3673A3EF3DCE9C67BD916C809914B40ED
62            Session-ID-ctx: 01000000
63            Master-Key: A7CEFC571974BE02CAC305269DC59F76EA9F0B180CB6642697A68251F2D2BB57E51DBBB4C7885573192AE9AEE220FACD
64            Key-Arg   : None
65            Start Time: 948459261
66            Timeout   : 300 (sec)
67            Verify return code 0 (ok)
68
69       Theses are described below in more detail.
70
71       Protocol
72           this is the protocol in use TLSv1, SSLv3 or SSLv2.
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74       Cipher
75           the cipher used this is the actual raw SSL or TLS cipher code, see
76           the SSL or TLS specifications for more information.
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78       Session-ID
79           the SSL session ID in hex format.
80
81       Session-ID-ctx
82           the session ID context in hex format.
83
84       Master-Key
85           this is the SSL session master key.
86
87       Key-Arg
88           the key argument, this is only used in SSL v2.
89
90       Start Time
91           this is the session start time represented as an integer in
92           standard Unix format.
93
94       Timeout
95           the timeout in seconds.
96
97       Verify return code
98           this is the return code when an SSL client certificate is verified.
99

NOTES

101       The PEM encoded session format uses the header and footer lines:
102
103        -----BEGIN SSL SESSION PARAMETERS-----
104        -----END SSL SESSION PARAMETERS-----
105
106       Since the SSL session output contains the master key it is possible to
107       read the contents of an encrypted session using this information.
108       Therefore appropriate security precautions should be taken if the
109       information is being output by a "real" application. This is however
110       strongly discouraged and should only be used for debugging purposes.
111

BUGS

113       The cipher and start time should be printed out in human readable form.
114

SEE ALSO

116       ciphers(1), s_server(1)
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1201.0.1e                            2013-02-11                        SESS_ID(1)
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