264 lines
8.3 KiB
Groff
264 lines
8.3 KiB
Groff
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.\" ========================================================================
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.\"
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.IX Title "OPENSSL-SPKAC 1"
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.TH OPENSSL-SPKAC 1 "2020-03-02" "3.0.0-dev" "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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openssl\-spkac \- SPKAC printing and generating utility
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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\&\fBopenssl\fR \fBspkac\fR
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[\fB\-help\fR]
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[\fB\-in\fR \fIfilename\fR]
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[\fB\-out\fR \fIfilename\fR]
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[\fB\-key\fR \fIkeyfile\fR]
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[\fB\-keyform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR|\fB\s-1ENGINE\s0\fR]
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[\fB\-passin\fR \fIarg\fR]
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[\fB\-challenge\fR \fIstring\fR]
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[\fB\-pubkey\fR]
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[\fB\-spkac\fR \fIspkacname\fR]
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[\fB\-spksect\fR \fIsection\fR]
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[\fB\-noout\fR]
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[\fB\-verify\fR]
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[\fB\-engine\fR \fIid\fR]
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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This command processes Netscape signed public key and challenge
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(\s-1SPKAC\s0) files. It can print out their contents, verify the signature and
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produce its own SPKACs from a supplied private key.
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.SH "OPTIONS"
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.IX Header "OPTIONS"
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.IP "\fB\-help\fR" 4
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.IX Item "-help"
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Print out a usage message.
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.IP "\fB\-in\fR \fIfilename\fR" 4
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.IX Item "-in filename"
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This specifies the input filename to read from or standard input if this
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option is not specified. Ignored if the \fB\-key\fR option is used.
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.IP "\fB\-out\fR \fIfilename\fR" 4
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.IX Item "-out filename"
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Specifies the output filename to write to or standard output by
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default.
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.IP "\fB\-key\fR \fIkeyfile\fR" 4
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.IX Item "-key keyfile"
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Create an \s-1SPKAC\s0 file using the private key in \fIkeyfile\fR. The
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\&\fB\-in\fR, \fB\-noout\fR, \fB\-spksect\fR and \fB\-verify\fR options are ignored if
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present.
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.IP "\fB\-keyform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR|\fB\s-1ENGINE\s0\fR" 4
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.IX Item "-keyform DER|PEM|ENGINE"
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The key format; the default is \fB\s-1PEM\s0\fR.
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See \*(L"Format Options\*(R" in \fIopenssl\fR\|(1) for details.
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.IP "\fB\-passin\fR \fIarg\fR" 4
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.IX Item "-passin arg"
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The input file password source. For more information about the format of \fIarg\fR
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see \*(L"Pass Phrase Options\*(R" in \fIopenssl\fR\|(1).
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.IP "\fB\-challenge\fR \fIstring\fR" 4
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.IX Item "-challenge string"
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Specifies the challenge string if an \s-1SPKAC\s0 is being created.
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.IP "\fB\-spkac\fR \fIspkacname\fR" 4
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.IX Item "-spkac spkacname"
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Allows an alternative name form the variable containing the
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\&\s-1SPKAC\s0. The default is \*(L"\s-1SPKAC\s0\*(R". This option affects both
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generated and input \s-1SPKAC\s0 files.
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.IP "\fB\-spksect\fR \fIsection\fR" 4
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.IX Item "-spksect section"
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Allows an alternative name form the section containing the
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\&\s-1SPKAC\s0. The default is the default section.
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.IP "\fB\-noout\fR" 4
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.IX Item "-noout"
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Don't output the text version of the \s-1SPKAC\s0 (not used if an
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\&\s-1SPKAC\s0 is being created).
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.IP "\fB\-pubkey\fR" 4
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.IX Item "-pubkey"
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Output the public key of an \s-1SPKAC\s0 (not used if an \s-1SPKAC\s0 is
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being created).
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.IP "\fB\-verify\fR" 4
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.IX Item "-verify"
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Verifies the digital signature on the supplied \s-1SPKAC\s0.
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.IP "\fB\-engine\fR \fIid\fR" 4
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.IX Item "-engine id"
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See \*(L"Engine Options\*(R" in \fIopenssl\fR\|(1).
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.SH "EXAMPLES"
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.IX Header "EXAMPLES"
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Print out the contents of an \s-1SPKAC:\s0
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.PP
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.Vb 1
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\& openssl spkac \-in spkac.cnf
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.Ve
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.PP
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Verify the signature of an \s-1SPKAC:\s0
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.PP
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.Vb 1
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\& openssl spkac \-in spkac.cnf \-noout \-verify
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.Ve
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.PP
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Create an \s-1SPKAC\s0 using the challenge string \*(L"hello\*(R":
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.PP
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.Vb 1
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\& openssl spkac \-key key.pem \-challenge hello \-out spkac.cnf
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.Ve
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.PP
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Example of an \s-1SPKAC\s0, (long lines split up for clarity):
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.PP
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.Vb 6
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\& SPKAC=MIG5MGUwXDANBgkqhkiG9w0BAQEFAANLADBIAkEA\e
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\& 1cCoq2Wa3Ixs47uI7FPVwHVIPDx5yso105Y6zpozam135a\e
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\& 8R0CpoRvkkigIyXfcCjiVi5oWk+6FfPaD03uPFoQIDAQAB\e
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\& FgVoZWxsbzANBgkqhkiG9w0BAQQFAANBAFpQtY/FojdwkJ\e
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\& h1bEIYuc2EeM2KHTWPEepWYeawvHD0gQ3DngSC75YCWnnD\e
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\& dq+NQ3F+X4deMx9AaEglZtULwV4=
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.Ve
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.SH "NOTES"
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.IX Header "NOTES"
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A created \s-1SPKAC\s0 with suitable \s-1DN\s0 components appended can be fed to
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\&\fIopenssl\-ca\fR\|(1).
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.PP
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SPKACs are typically generated by Netscape when a form is submitted
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containing the \fB\s-1KEYGEN\s0\fR tag as part of the certificate enrollment
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process.
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.PP
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The challenge string permits a primitive form of proof of possession
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of private key. By checking the \s-1SPKAC\s0 signature and a random challenge
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string some guarantee is given that the user knows the private key
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corresponding to the public key being certified. This is important in
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some applications. Without this it is possible for a previous \s-1SPKAC\s0
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to be used in a \*(L"replay attack\*(R".
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIopenssl\fR\|(1),
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\&\fIopenssl\-ca\fR\|(1)
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2000\-2019 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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