openssl-rsa - RSA key processing command
openssl rsa [
-help] [
-inform
DER|
PEM|
P12|
ENGINE] [
-outform
DER|
PEM] [
-in filename|
uri] [
-passin arg] [
-out filename] [
-passout
arg] [
-aes128] [
-aes192] [
-aes256] [
-aria128] [
-aria192] [
-aria256] [
-camellia128]
[
-camellia192] [
-camellia256] [
-des] [
-des3] [
-idea] [
-text] [
-noout] [
-modulus] [
-traditional] [
-check] [
-pubin] [
-pubout] [
-RSAPublicKey_in] [
-RSAPublicKey_out] [
-pvk-strong] [
-pvk-weak] [
-pvk-none] [
-engine id] [
-provider name] [
-provider-path path] [
-propquery propq]
This command processes RSA keys. They can be converted between various forms and
their components printed out.
- -help
- Print out a usage message.
-
-inform
DER|PEM|P12|ENGINE
- 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.
- -traditional
- When writing a private key, use the traditional PKCS#1
format instead of the PKCS#8 format.
-
-in filename|uri
- This specifies the input 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.
-
-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).
-
-out filename
- This specifies the output filename to write a key to or
standard output if this option 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.
-
-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 various public or private key components in
plain text in addition to the encoded version.
- -noout
- This option prevents output of the encoded version of the
key.
- -modulus
- This option prints out the value of the modulus of the
key.
- -check
- This option checks the consistency of an RSA private
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.
-
-RSAPublicKey_in, -RSAPublicKey_out
- Like -pubin and -pubout except
RSAPublicKey format is used instead.
- -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 an RSA private key:
openssl rsa -in key.pem -out keyout.pem
To encrypt a private key using triple DES:
openssl rsa -in key.pem -des3 -out keyout.pem
To convert a private key from PEM to DER format:
openssl rsa -in key.pem -outform DER -out keyout.der
To print out the components of a private key to standard output:
openssl rsa -in key.pem -text -noout
To just output the public part of a private key:
openssl rsa -in key.pem -pubout -out pubkey.pem
Output the public part of a private key in
RSAPublicKey format:
openssl rsa -in key.pem -RSAPublicKey_out -out pubkey.pem
There should be an option that automatically handles
.key files, without
having to manually edit them.
openssl(1),
openssl-pkey(1),
openssl-pkcs8(1),
openssl-dsa(1),
openssl-genrsa(1),
openssl-gendsa(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>.