openssl-dsa - DSA key processing
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]
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
- -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.
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
openssl(1),
openssl-pkey(1),
openssl-dsaparam(1),
openssl-gendsa(1),
openssl-rsa(1),
openssl-genrsa(1)
The
-engine option was deprecated in OpenSSL 3.0.
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>.