6 pkey - public or private key processing tool
31 The B<pkey> command processes public or private keys. They can be converted
32 between various forms and their components printed out.
40 Print out a usage message.
42 =item B<-inform DER|PEM>
44 This specifies the input format DER or PEM. The default format is PEM.
46 =item B<-outform DER|PEM>
48 This specifies the output format, the options have the same meaning and default
49 as the B<-inform> option.
53 This specifies the input filename to read a key from or standard input if this
54 option is not specified. If the key is encrypted a pass phrase will be
59 The input file password source. For more information about the format of B<arg>
60 see the B<PASS PHRASE ARGUMENTS> section in L<openssl(1)>.
62 =item B<-out filename>
64 This specifies the output filename to write a key to or standard output if this
65 option is not specified. If any encryption options are set then a pass phrase
66 will be prompted for. The output filename should B<not> be the same as the input
69 =item B<-passout password>
71 The output file password source. For more information about the format of B<arg>
72 see the B<PASS PHRASE ARGUMENTS> section in L<openssl(1)>.
76 Normally a private key is written using standard format: this is PKCS#8 form
77 with the appropriate encryption algorithm (if any). If the B<-traditional>
78 option is specified then the older "traditional" format is used instead.
82 These options encrypt the private key with the supplied cipher. Any algorithm
83 name accepted by EVP_get_cipherbyname() is acceptable such as B<des3>.
87 Prints out the various public or private key components in
88 plain text in addition to the encoded version.
92 Print out only public key components even if a private key is being processed.
96 Do not output the encoded version of the key.
100 By default a private key is read from the input file: with this
101 option a public key is read instead.
105 By default a private key is output: with this option a public
106 key will be output instead. This option is automatically set if
107 the input is a public key.
111 Specifying an engine (by its unique B<id> string) will cause B<pkey>
112 to attempt to obtain a functional reference to the specified engine,
113 thus initialising it if needed. The engine will then be set as the default
114 for all available algorithms.
118 This option checks the consistency of a key pair for both public and private
123 This option checks the correctness of either a public key or the public component
130 To remove the pass phrase on an RSA private key:
132 openssl pkey -in key.pem -out keyout.pem
134 To encrypt a private key using triple DES:
136 openssl pkey -in key.pem -des3 -out keyout.pem
138 To convert a private key from PEM to DER format:
140 openssl pkey -in key.pem -outform DER -out keyout.der
142 To print out the components of a private key to standard output:
144 openssl pkey -in key.pem -text -noout
146 To print out the public components of a private key to standard output:
148 openssl pkey -in key.pem -text_pub -noout
150 To just output the public part of a private key:
152 openssl pkey -in key.pem -pubout -out pubkey.pem
156 L<genpkey(1)>, L<rsa(1)>, L<pkcs8(1)>,
157 L<dsa(1)>, L<genrsa(1)>, L<gendsa(1)>
161 Copyright 2006-2017 The OpenSSL Project Authors. All Rights Reserved.
163 Licensed under the OpenSSL license (the "License"). You may not use
164 this file except in compliance with the License. You can obtain a copy
165 in the file LICENSE in the source distribution or at
166 L<https://www.openssl.org/source/license.html>.