4 {- join("\n", @autowarntext) -}
10 openssl-pkey - public or private key processing tool
16 [B<-inform> B<DER>|B<PEM>]
17 [B<-outform> B<DER>|B<PEM>]
31 {- $OpenSSL::safe::opt_engine_synopsis -}
33 =for openssl ifdef engine
37 This command processes public or private keys. They can be
38 converted between various forms and their components printed out.
46 Print out a usage message.
48 =item B<-inform> B<DER>|B<PEM>, B<-outform> B<DER>|B<PEM>
50 The input and formats; the default is B<PEM>.
51 See L<openssl(1)/Format Options> for details.
53 =item B<-in> I<filename>
55 This specifies the input filename to read a key from or standard input if this
56 option is not specified. If the key is encrypted a pass phrase will be
59 =item B<-passin> I<arg>, B<-passout> I<arg>
61 The password source for the input and output file.
62 For more information about the format of B<arg>
63 see L<openssl(1)/Pass Phrase Options>.
65 =item B<-out> I<filename>
67 This specifies the output filename to write a key to or standard output if this
68 option is not specified. If any encryption options are set then a pass phrase
69 will be prompted for. The output filename should B<not> be the same as the input
74 Normally a private key is written using standard format: this is PKCS#8 form
75 with the appropriate encryption algorithm (if any). If the B<-traditional>
76 option is specified then the older "traditional" format is used instead.
80 These options encrypt the private key with the supplied cipher. Any algorithm
81 name accepted by EVP_get_cipherbyname() is acceptable such as B<des3>.
85 Prints out the various public or private key components in
86 plain text in addition to the encoded version.
90 Print out only public key components even if a private key is being processed.
94 Do not output the encoded version of the key.
98 By default a private key is read from the input file: with this
99 option a public key is read instead.
103 By default a private key is output: with this option a public
104 key will be output instead. This option is automatically set if
105 the input is a public key.
109 This option checks the consistency of a key pair for both public and private
114 This option checks the correctness of either a public key or the public component
117 {- $OpenSSL::safe::opt_engine_item -}
123 To remove the pass phrase on an RSA private key:
125 openssl pkey -in key.pem -out keyout.pem
127 To encrypt a private key using triple DES:
129 openssl pkey -in key.pem -des3 -out keyout.pem
131 To convert a private key from PEM to DER format:
133 openssl pkey -in key.pem -outform DER -out keyout.der
135 To print out the components of a private key to standard output:
137 openssl pkey -in key.pem -text -noout
139 To print out the public components of a private key to standard output:
141 openssl pkey -in key.pem -text_pub -noout
143 To just output the public part of a private key:
145 openssl pkey -in key.pem -pubout -out pubkey.pem
150 L<openssl-genpkey(1)>,
154 L<openssl-genrsa(1)>,
159 Copyright 2006-2019 The OpenSSL Project Authors. All Rights Reserved.
161 Licensed under the Apache License 2.0 (the "License"). You may not use
162 this file except in compliance with the License. You can obtain a copy
163 in the file LICENSE in the source distribution or at
164 L<https://www.openssl.org/source/license.html>.