openssl-dsa(1) - phpMan

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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] [-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 file. With this option a public key
           is read instead.

       -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 2000-2021 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>.

3.0.2                                       2024-08-20                          OPENSSL-DSA(1SSL)

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