259 lines
8.3 KiB
Groff
259 lines
8.3 KiB
Groff
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.\" ========================================================================
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.\"
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.IX Title "SESS_ID 1"
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.TH SESS_ID 1 "2015-07-09" "1.0.1p" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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sess_id \- SSL/TLS session handling utility
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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\&\fBopenssl\fR \fBsess_id\fR
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[\fB\-inform PEM|DER\fR]
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[\fB\-outform PEM|DER\fR]
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[\fB\-in filename\fR]
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[\fB\-out filename\fR]
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[\fB\-text\fR]
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[\fB\-noout\fR]
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[\fB\-context \s-1ID\s0\fR]
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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The \fBsess_id\fR process the encoded version of the \s-1SSL\s0 session structure
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and optionally prints out \s-1SSL\s0 session details (for example the \s-1SSL\s0 session
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master key) in human readable format. Since this is a diagnostic tool that
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needs some knowledge of the \s-1SSL\s0 protocol to use properly, most users will
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not need to use it.
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.IP "\fB\-inform DER|PEM\fR" 4
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.IX Item "-inform DER|PEM"
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This specifies the input format. The \fB\s-1DER\s0\fR option uses an \s-1ASN1 DER\s0 encoded
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format containing session details. The precise format can vary from one version
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to the next. The \fB\s-1PEM\s0\fR form is the default format: it consists of the \fB\s-1DER\s0\fR
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format base64 encoded with additional header and footer lines.
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.IP "\fB\-outform DER|PEM\fR" 4
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.IX Item "-outform DER|PEM"
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This specifies the output format, the options have the same meaning as the
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\&\fB\-inform\fR option.
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.IP "\fB\-in filename\fR" 4
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.IX Item "-in filename"
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This specifies the input filename to read session information from or standard
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input by default.
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.IP "\fB\-out filename\fR" 4
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.IX Item "-out filename"
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This specifies the output filename to write session information to or standard
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output if this option is not specified.
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.IP "\fB\-text\fR" 4
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.IX Item "-text"
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prints out the various public or private key components in
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plain text in addition to the encoded version.
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.IP "\fB\-cert\fR" 4
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.IX Item "-cert"
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if a certificate is present in the session it will be output using this option,
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if the \fB\-text\fR option is also present then it will be printed out in text form.
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.IP "\fB\-noout\fR" 4
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.IX Item "-noout"
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this option prevents output of the encoded version of the session.
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.IP "\fB\-context \s-1ID\s0\fR" 4
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.IX Item "-context ID"
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this option can set the session id so the output session information uses the
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supplied \s-1ID.\s0 The \s-1ID\s0 can be any string of characters. This option wont normally
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be used.
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.SH "OUTPUT"
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.IX Header "OUTPUT"
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Typical output:
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.PP
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.Vb 10
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\& SSL\-Session:
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\& Protocol : TLSv1
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\& Cipher : 0016
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\& Session\-ID: 871E62626C554CE95488823752CBD5F3673A3EF3DCE9C67BD916C809914B40ED
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\& Session\-ID\-ctx: 01000000
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\& Master\-Key: A7CEFC571974BE02CAC305269DC59F76EA9F0B180CB6642697A68251F2D2BB57E51DBBB4C7885573192AE9AEE220FACD
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\& Key\-Arg : None
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\& Start Time: 948459261
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\& Timeout : 300 (sec)
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\& Verify return code 0 (ok)
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.Ve
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.PP
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Theses are described below in more detail.
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.IP "\fBProtocol\fR" 4
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.IX Item "Protocol"
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this is the protocol in use TLSv1, SSLv3 or SSLv2.
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.IP "\fBCipher\fR" 4
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.IX Item "Cipher"
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the cipher used this is the actual raw \s-1SSL\s0 or \s-1TLS\s0 cipher code, see the \s-1SSL\s0
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or \s-1TLS\s0 specifications for more information.
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.IP "\fBSession-ID\fR" 4
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.IX Item "Session-ID"
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the \s-1SSL\s0 session \s-1ID\s0 in hex format.
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.IP "\fBSession-ID-ctx\fR" 4
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.IX Item "Session-ID-ctx"
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the session \s-1ID\s0 context in hex format.
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.IP "\fBMaster-Key\fR" 4
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.IX Item "Master-Key"
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this is the \s-1SSL\s0 session master key.
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.IP "\fBKey-Arg\fR" 4
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.IX Item "Key-Arg"
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the key argument, this is only used in \s-1SSL\s0 v2.
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.IP "\fBStart Time\fR" 4
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.IX Item "Start Time"
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this is the session start time represented as an integer in standard Unix format.
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.IP "\fBTimeout\fR" 4
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.IX Item "Timeout"
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the timeout in seconds.
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.IP "\fBVerify return code\fR" 4
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.IX Item "Verify return code"
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this is the return code when an \s-1SSL\s0 client certificate is verified.
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.SH "NOTES"
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.IX Header "NOTES"
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The \s-1PEM\s0 encoded session format uses the header and footer lines:
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.PP
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.Vb 2
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\& \-\-\-\-\-BEGIN SSL SESSION PARAMETERS\-\-\-\-\-
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\& \-\-\-\-\-END SSL SESSION PARAMETERS\-\-\-\-\-
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.Ve
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.PP
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Since the \s-1SSL\s0 session output contains the master key it is possible to read the contents
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of an encrypted session using this information. Therefore appropriate security precautions
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should be taken if the information is being output by a \*(L"real\*(R" application. This is
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however strongly discouraged and should only be used for debugging purposes.
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.SH "BUGS"
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.IX Header "BUGS"
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The cipher and start time should be printed out in human readable form.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIciphers\fR\|(1), \fIs_server\fR\|(1)
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