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CentOS 7.0 - man page for pkey (centos section 1)

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PKEY(1) 				     OpenSSL					  PKEY(1)

NAME
       pkey - public or private key processing tool

SYNOPSIS
       openssl pkey [-inform PEM|DER] [-outform PEM|DER] [-in filename] [-passin arg] [-out
       filename] [-passout arg] [-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.

COMMAND OPTIONS
       -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 openssl(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.

       -passout password
	   the output file password source. For more information about the format of arg see the
	   PASS PHRASE ARGUMENTS section in openssl(1).

       -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.

EXAMPLES
       To remove the pass phrase on an RSA private key:

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

       To encrypt a private key using triple DES:

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

       To convert a private key from PEM to DER format:

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

       To print out the components of a private key to standard output:

	openssl pkey -in key.pem -text -noout

       To print out the public components of a private key to standard output:

	openssl pkey -in key.pem -text_pub -noout

       To just output the public part of a private key:

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

SEE ALSO
       genpkey(1), rsa(1), pkcs8(1), dsa(1), genrsa(1), gendsa(1)

1.0.1e					    2013-02-11					  PKEY(1)
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