4 {- join("\n", @autowarntext) -}
10 openssl-dsa - DSA key processing
16 [B<-inform> B<DER>|B<PEM>]
17 [B<-outform> B<DER>|B<PEM>]
39 {- $OpenSSL::safe::opt_engine_synopsis -}
40 {- $OpenSSL::safe::opt_provider_synopsis -}
42 =for openssl ifdef pvk-string pvk-weak pvk-none engine
46 This command has been deprecated.
47 The L<openssl-pkey(1)> command should be used instead.
49 This command processes DSA keys. They can be converted between various
50 forms and their components printed out. B<Note> This command uses the
51 traditional SSLeay compatible format for private key encryption: newer
52 applications should use the more secure PKCS#8 format using the B<pkcs8>
60 Print out a usage message.
62 =item B<-inform> B<DER>|B<PEM>, B<-outform> B<DER>|B<PEM>
64 The input and formats; the default is B<PEM>.
65 See L<openssl(1)/Format Options> for details.
67 Private keys are a sequence of B<ASN.1 INTEGERS>: the version (zero), B<p>,
68 B<q>, B<g>, and the public and and private key components. Public keys
69 are a B<SubjectPublicKeyInfo> structure with the B<DSA> type.
71 The B<PEM> format also accepts PKCS#8 data.
73 =item B<-in> I<filename>
75 This specifies the input filename to read a key from or standard input if this
76 option is not specified. If the key is encrypted a pass phrase will be
79 =item B<-out> I<filename>
81 This specifies the output filename to write a key to or standard output by
82 is not specified. If any encryption options are set then a pass phrase will be
83 prompted for. The output filename should B<not> be the same as the input
86 =item B<-passin> I<arg>, B<-passout> I<arg>
88 The password source for the input and output file.
89 For more information about the format of B<arg>
90 see L<openssl(1)/Pass Phrase Options>.
92 =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>
94 These options encrypt the private key with the specified
95 cipher before outputting it. A pass phrase is prompted for.
96 If none of these options is specified the key is written in plain text. This
97 means that this command can be used to remove the pass phrase from a key
98 by not giving any encryption option is given, or to add or change the pass
99 phrase by setting them.
100 These options can only be used with PEM format output files.
104 Prints out the public, private key components and parameters.
108 This option prevents output of the encoded version of the key.
112 This option prints out the value of the public key component of the key.
116 By default, a private key is read from the input file. With this option a
117 public key is read instead.
121 By default, a private key is output. With this option a public
122 key will be output instead. This option is automatically set if the input is
125 {- $OpenSSL::safe::opt_engine_item -}
127 {- $OpenSSL::safe::opt_provider_item -}
133 Examples equivalent to these can be found in the documentation for the
134 non-deprecated L<openssl-pkey(1)> command.
136 To remove the pass phrase on a DSA private key:
138 openssl dsa -in key.pem -out keyout.pem
140 To encrypt a private key using triple DES:
142 openssl dsa -in key.pem -des3 -out keyout.pem
144 To convert a private key from PEM to DER format:
146 openssl dsa -in key.pem -outform DER -out keyout.der
148 To print out the components of a private key to standard output:
150 openssl dsa -in key.pem -text -noout
152 To just output the public part of a private key:
154 openssl dsa -in key.pem -pubout -out pubkey.pem
160 L<openssl-dsaparam(1)>,
161 L<openssl-gendsa(1)>,
167 This command was deprecated in OpenSSL 3.0.
171 Copyright 2000-2019 The OpenSSL Project Authors. All Rights Reserved.
173 Licensed under the Apache License 2.0 (the "License"). You may not use
174 this file except in compliance with the License. You can obtain a copy
175 in the file LICENSE in the source distribution or at
176 L<https://www.openssl.org/source/license.html>.