oracular (1) openssl-dsa.1ssl.gz

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] [-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
       -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
       <https://www.openssl.org/source/license.html>.