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136 lines
3.2 KiB
136 lines
3.2 KiB
4 years ago
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=pod
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=head1 NAME
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pkey - public or private key processing tool
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=head1 SYNOPSIS
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B<openssl> B<pkey>
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[B<-inform PEM|DER>]
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[B<-outform PEM|DER>]
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[B<-in filename>]
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[B<-passin arg>]
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[B<-out filename>]
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[B<-passout arg>]
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[B<-cipher>]
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[B<-text>]
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[B<-text_pub>]
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[B<-noout>]
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[B<-pubin>]
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[B<-pubout>]
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[B<-engine id>]
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=head1 DESCRIPTION
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The B<pkey> command processes public or private keys. They can be converted
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between various forms and their components printed out.
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=head1 COMMAND OPTIONS
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=over 4
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=item B<-inform DER|PEM>
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This specifies the input format DER or PEM.
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=item B<-outform DER|PEM>
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This specifies the output format, the options have the same meaning as the
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B<-inform> option.
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=item B<-in filename>
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This specifies the input filename to read a key from or standard input if this
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option is not specified. If the key is encrypted a pass phrase will be
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prompted for.
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=item B<-passin arg>
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the input file password source. For more information about the format of B<arg>
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see the B<PASS PHRASE ARGUMENTS> section in L<openssl(1)|openssl(1)>.
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=item B<-out filename>
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This specifies the output filename to write a key to or standard output if this
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option is not specified. If any encryption options are set then a pass phrase
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will be prompted for. The output filename should B<not> be the same as the input
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filename.
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=item B<-passout password>
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the output file password source. For more information about the format of B<arg>
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see the B<PASS PHRASE ARGUMENTS> section in L<openssl(1)|openssl(1)>.
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=item B<-cipher>
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These options encrypt the private key with the supplied cipher. Any algorithm
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name accepted by EVP_get_cipherbyname() is acceptable such as B<des3>.
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=item B<-text>
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prints out the various public or private key components in
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plain text in addition to the encoded version.
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=item B<-text_pub>
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print out only public key components even if a private key is being processed.
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=item B<-noout>
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do not output the encoded version of the key.
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=item B<-pubin>
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by default a private key is read from the input file: with this
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option a public key is read instead.
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=item B<-pubout>
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by default a private key is output: with this option a public
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key will be output instead. This option is automatically set if
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the input is a public key.
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=item B<-engine id>
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specifying an engine (by its unique B<id> string) will cause B<pkey>
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to attempt to obtain a functional reference to the specified engine,
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thus initialising it if needed. The engine will then be set as the default
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for all available algorithms.
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=back
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=head1 EXAMPLES
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To remove the pass phrase on an RSA private key:
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openssl pkey -in key.pem -out keyout.pem
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To encrypt a private key using triple DES:
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openssl pkey -in key.pem -des3 -out keyout.pem
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To convert a private key from PEM to DER format:
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openssl pkey -in key.pem -outform DER -out keyout.der
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To print out the components of a private key to standard output:
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openssl pkey -in key.pem -text -noout
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To print out the public components of a private key to standard output:
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openssl pkey -in key.pem -text_pub -noout
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To just output the public part of a private key:
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openssl pkey -in key.pem -pubout -out pubkey.pem
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=head1 SEE ALSO
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L<genpkey(1)|genpkey(1)>, L<rsa(1)|rsa(1)>, L<pkcs8(1)|pkcs8(1)>,
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L<dsa(1)|dsa(1)>, L<genrsa(1)|genrsa(1)>, L<gendsa(1)|gendsa(1)>
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=cut
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