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• NAME
• SYNOPSIS
• DESCRIPTION
• OPTIONS
• EXAMPLES
• SEE ALSO
• COPYRIGHT

NAME

openssl-pkey, pkey - public or private key processing tool

SYNOPSIS

openssl pkey [-help] [-inform PEM|DER] [-outform PEM|DER] [-in filename] [-passin arg] [-out filename] [-passout arg] [-traditional] [-cipher] [-text] [-text_pub] [-noout] [-pubin] [-pubout] [-engine id]

DESCRIPTION

The pkey command processes public or private keys. They can be converted between various forms and their components printed out.

OPTIONS

-help

Print out a usage message.

-inform DER|PEM

This specifies the input format DER or PEM.

-outform DER|PEM

This specifies the output format, the options have the same meaning as the -inform option.

-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.

-passin arg

the input file password source. For more information about the format of arg see the PASS PHRASE ARGUMENTS section in -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.

-passout password

the output file password source. For more information about the format of arg see the PASS PHRASE ARGUMENTS section in -traditional

normally a private key is written using standard format: this is PKCS#8 form with the appropriate encryption algorithm (if any). If the -traditional option is specified then the older "traditional" format is used instead.

-cipher

These options encrypt the private key with the supplied cipher. Any algorithm name accepted by EVP_get_cipherbyname() is acceptable such as des3.

-text

prints out the various public or private key components in plain text in addition to the encoded version.

-text_pub

print out only public key components even if a private key is being processed.

-noout

do not output the encoded version 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.

-engine id

specifying an engine (by its unique id string) will cause pkey to attempt to obtain a functional reference to the specified engine, thus initialising it if needed. The engine will then be set as the default for all available algorithms.

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

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

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

openssl pkey -in key.pem -text -noout

openssl pkey -in key.pem -text_pub -noout

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

rsa(1), dsa(1), gendsa(1)

COPYRIGHT

Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (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.