mirror of
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196 lines
4.8 KiB
Plaintext
196 lines
4.8 KiB
Plaintext
=pod
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=begin comment
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{- join("\n", @autowarntext) -}
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=end comment
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=head1 NAME
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openssl-dsa - DSA key processing
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=head1 SYNOPSIS
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B<openssl> B<dsa>
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[B<-help>]
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[B<-inform> B<DER>|B<PEM>]
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[B<-outform> B<DER>|B<PEM>]
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[B<-in> I<filename>]
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[B<-passin> I<arg>]
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[B<-out> I<filename>]
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[B<-passout> I<arg>]
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[B<-aes128>]
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[B<-aes192>]
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[B<-aes256>]
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[B<-aria128>]
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[B<-aria192>]
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[B<-aria256>]
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[B<-camellia128>]
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[B<-camellia192>]
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[B<-camellia256>]
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[B<-des>]
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[B<-des3>]
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[B<-idea>]
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[B<-text>]
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[B<-noout>]
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[B<-modulus>]
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[B<-pubin>]
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[B<-pubout>]
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[B<-pvk-strong>]
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[B<-pvk-weak>]
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[B<-pvk-none>]
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{- $OpenSSL::safe::opt_engine_synopsis -}{- $OpenSSL::safe::opt_provider_synopsis -}
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=head1 DESCRIPTION
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This command processes DSA keys. They can be converted between various
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forms and their components printed out. B<Note> This command uses the
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traditional SSLeay compatible format for private key encryption: newer
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applications should use the more secure PKCS#8 format using the B<pkcs8>
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=head1 OPTIONS
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=over 4
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=item B<-help>
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Print out a usage message.
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=item B<-inform> B<DER>|B<PEM>
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The key input format; unspecified by default.
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See L<openssl-format-options(1)> for details.
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=item B<-outform> B<DER>|B<PEM>
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The key output format; the default is B<PEM>.
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See L<openssl-format-options(1)> for details.
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Private keys are a sequence of B<ASN.1 INTEGERS>: the version (zero), B<p>,
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B<q>, B<g>, and the public and private key components. Public keys
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are a B<SubjectPublicKeyInfo> structure with the B<DSA> type.
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The B<PEM> format also accepts PKCS#8 data.
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=item B<-in> I<filename>
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This specifies the input filename to read a key from or standard input if this
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option is not specified. If the key is encrypted a pass phrase will be
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prompted for.
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=item B<-out> I<filename>
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This specifies the output filename to write a key to or standard output by
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is not specified. If any encryption options are set then a pass phrase will be
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prompted for. The output filename should B<not> be the same as the input
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filename.
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=item B<-passin> I<arg>, B<-passout> I<arg>
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The password source for the input and output file.
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For more information about the format of B<arg>
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see L<openssl-passphrase-options(1)>.
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=item B<-aes128>, B<-aes192>, B<-aes256>, B<-aria128>, B<-aria192>, B<-aria256>, B<-camellia128>, B<-camellia192>, B<-camellia256>, B<-des>, B<-des3>, B<-idea>
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These options encrypt the private key with the specified
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cipher before outputting it. A pass phrase is prompted for.
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If none of these options is specified the key is written in plain text. This
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means that this command can be used to remove the pass phrase from a key
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by not giving any encryption option is given, or to add or change the pass
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phrase by setting them.
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These options can only be used with PEM format output files.
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=item B<-text>
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Prints out the public, private key components and parameters.
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=item B<-noout>
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This option prevents output of the encoded version of the key.
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=item B<-modulus>
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This option prints out the value of the public key component of the key.
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=item B<-pubin>
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By default, a private key is read from the input file. With this option a
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public key is read instead.
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=item B<-pubout>
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By default, a private key is output. With this option a public
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key will be output instead. This option is automatically set if the input is
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a public key.
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=item B<-pvk-strong>
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Enable 'Strong' PVK encoding level (default).
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=item B<-pvk-weak>
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Enable 'Weak' PVK encoding level.
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=item B<-pvk-none>
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Don't enforce PVK encoding.
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{- $OpenSSL::safe::opt_engine_item -}
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{- $OpenSSL::safe::opt_provider_item -}
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=back
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The L<openssl-pkey(1)> command is capable of performing all the operations
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this command can, as well as supporting other public key types.
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=head1 EXAMPLES
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The documentation for the L<openssl-pkey(1)> command contains examples
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equivalent to the ones listed here.
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To remove the pass phrase on a DSA private key:
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openssl dsa -in key.pem -out keyout.pem
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To encrypt a private key using triple DES:
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openssl dsa -in key.pem -des3 -out keyout.pem
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To convert a private key from PEM to DER format:
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openssl dsa -in key.pem -outform DER -out keyout.der
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To print out the components of a private key to standard output:
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openssl dsa -in key.pem -text -noout
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To just output the public part of a private key:
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openssl dsa -in key.pem -pubout -out pubkey.pem
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=head1 SEE ALSO
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L<openssl(1)>,
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L<openssl-pkey(1)>,
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L<openssl-dsaparam(1)>,
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L<openssl-gendsa(1)>,
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L<openssl-rsa(1)>,
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L<openssl-genrsa(1)>
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=head1 HISTORY
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The B<-engine> option was deprecated in OpenSSL 3.0.
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=head1 COPYRIGHT
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Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). 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 LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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