=pod =head1 NAME pkey - public or private key processing tool =head1 SYNOPSIS B B [B<-inform PEM|DER>] [B<-outform PEM|DER>] [B<-in filename>] [B<-passin arg>] [B<-out filename>] [B<-passout arg>] [B<-cipher>] [B<-text>] [B<-text_pub>] [B<-noout>] [B<-pubin>] [B<-pubout>] [B<-engine id>] =head1 DESCRIPTION The B command processes public or private keys. They can be converted between various forms and their components printed out. =head1 COMMAND OPTIONS =over 4 =item B<-inform DER|PEM> This specifies the input format DER or PEM. =item B<-outform DER|PEM> This specifies the output format, the options have the same meaning as the B<-inform> option. =item B<-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. =item B<-passin arg> the input file password source. For more information about the format of B see the B section in L. =item B<-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 B be the same as the input filename. =item B<-passout password> the output file password source. For more information about the format of B see the B section in L. =item B<-cipher> These options encrypt the private key with the supplied cipher. Any algorithm name accepted by EVP_get_cipherbyname() is acceptable such as B. =item B<-text> prints out the various public or private key components in plain text in addition to the encoded version. =item B<-text_pub> print out only public key components even if a private key is being processed. =item B<-noout> do not output the encoded version of the key. =item B<-pubin> by default a private key is read from the input file: with this option a public key is read instead. =item B<-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. =item B<-engine id> specifying an engine (by its unique B string) will cause B 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. =back =head1 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 =head1 SEE ALSO L, L, L, L, L, L =cut