Manual: openssl-dsa

OPENSSL-DSA(1SSL)					   OpenSSL					   OPENSSL-DSA(1SSL)

NAME
       openssl-dsa - DSA key processing

SYNOPSIS
       openssl dsa [-help] [-inform DER|PEM] [-outform DER|PEM] [-in filename] [-passin arg] [-out filename] [-passout arg]
       [-aes128] [-aes192] [-aes256] [-aria128] [-aria192] [-aria256] [-camellia128] [-camellia192] [-camellia256] [-des]
       [-des3] [-idea] [-text] [-noout] [-modulus] [-pubin] [-pubout] [-pvk-strong] [-pvk-weak] [-pvk-none] [-engine id]
       [-provider name] [-provider-path path] [-provparam [name:]key=value] [-propquery propq]

DESCRIPTION
       This command processes DSA keys. They can be converted between various forms and their components printed out. Note
       This command uses the traditional SSLeay compatible format for private key encryption: newer applications should use
       the more secure PKCS#8 format using the pkcs8

OPTIONS
       -help
	   Print out a usage message.

       -inform DER|PEM
	   The key input format; unspecified by default.  See openssl-format-options(1) for details.

       -outform DER|PEM
	   The key output format; the default is PEM.  See openssl-format-options(1) for details.

	   Private  keys  are  a  sequence  of	ASN.1  INTEGERS: the version (zero), p, q, g, and the public and private key
	   components.	Public keys are a SubjectPublicKeyInfo structure with the DSA type.

	   The PEM format also accepts PKCS#8 data.

       -in filename
	   This specifies the input filename to read a key from or standard input if this option is not	 specified.  If	 the
	   key is encrypted a pass phrase will be prompted for.

       -out filename
	   This	 specifies  the	 output filename to write a key to or standard output by is not specified. If any encryption
	   options are set then a pass phrase will be prompted for. The output filename should not be the same as the  input
	   filename.

       -passin arg, -passout arg
	   The	password  source  for  the  input  and	output	file.	For  more  information	about  the format of arg see
	   openssl-passphrase-options(1).

       -aes128, -aes192, -aes256, -aria128, -aria192, -aria256, -camellia128, -camellia192, -camellia256, -des, -des3, -idea
	   These options encrypt the private key with the specified cipher before outputting it. A pass phrase	is  prompted
	   for.	 If none of these options is specified the key is written in plain text. This means that this command can be
	   used	 to  remove the pass phrase from a key by not giving any encryption option is given, or to add or change the
	   pass phrase by setting them.	 These options can only be used with PEM format output files.

       -text
	   Prints out the public, private key components and parameters.

       -noout
	   This option prevents output of the encoded version of the key.

       -modulus
	   This option prints out the value of the public key component of the key.

       -pubin
	   By default, a private key is read from the input.  With this option a public key is read instead.  If  the  input
	   contains no public key but a private key, its public part is used.

       -pubout
	   By  default,	 a  private  key  is  output.  With  this option a public key will be output instead. This option is
	   automatically set if the input is a public key.

       -pvk-strong
	   Enable 'Strong' PVK encoding level (default).

       -pvk-weak
	   Enable 'Weak' PVK encoding level.

       -pvk-none
	   Don't enforce PVK encoding.

       -engine id
	   See "Engine Options" in openssl(1).	This option is deprecated.

       -provider name
       -provider-path path
       -provparam [name:]key=value
       -propquery propq
	   See "Provider Options" in openssl(1), provider(7), and property(7).

       The openssl-pkey(1) command is capable of performing all the operations this command can, as well as supporting other
       public key types.

EXAMPLES
       The documentation for the openssl-pkey(1) command contains examples equivalent to the ones listed here.

       To remove the pass phrase on a DSA private key:

	openssl dsa -in key.pem -out keyout.pem

       To encrypt a private key using triple DES:

	openssl dsa -in key.pem -des3 -out keyout.pem

       To convert a private key from PEM to DER format:

	openssl dsa -in key.pem -outform DER -out keyout.der

       To print out the components of a private key to standard output:

	openssl dsa -in key.pem -text -noout

       To just output the public part of a private key:

	openssl dsa -in key.pem -pubout -out pubkey.pem

SEE ALSO
       openssl(1), openssl-pkey(1), openssl-dsaparam(1), openssl-gendsa(1), openssl-rsa(1), openssl-genrsa(1)

HISTORY
       The -engine option was deprecated in OpenSSL 3.0.

COPYRIGHT
       Copyright 2000-2023 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use this  file  except  in  compliance  with	 the
       License.	    You	   can	  obtain   a   copy   in   the	 file	LICENSE	  in   the   source   distribution   or	  at
       .

3.5.5							 2026-01-27					   OPENSSL-DSA(1SSL)