1PKEY(1)                             OpenSSL                            PKEY(1)
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NAME

6       openssl-pkey, pkey - public or private key processing tool
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SYNOPSIS

9       openssl pkey [-help] [-inform PEM|DER] [-outform PEM|DER] [-in
10       filename] [-passin arg] [-out filename] [-passout arg] [-traditional]
11       [-cipher] [-text] [-text_pub] [-noout] [-pubin] [-pubout] [-engine id]
12       [-check] [-pubcheck]
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DESCRIPTION

15       The pkey command processes public or private keys. They can be
16       converted between various forms and their components printed out.
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OPTIONS

19       -help
20           Print out a usage message.
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22       -inform DER|PEM
23           This specifies the input format DER or PEM. The default format is
24           PEM.
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26       -outform DER|PEM
27           This specifies the output format, the options have the same meaning
28           and default as the -inform option.
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30       -in filename
31           This specifies the input filename to read a key from or standard
32           input if this option is not specified. If the key is encrypted a
33           pass phrase will be prompted for.
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35       -passin arg
36           The input file password source. For more information about the
37           format of arg see "Pass Phrase Options" in openssl(1).
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39       -out filename
40           This specifies the output filename to write a key to or standard
41           output if this option is not specified. If any encryption options
42           are set then a pass phrase will be prompted for. The output
43           filename should not be the same as the input filename.
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45       -passout password
46           The output file password source. For more information about the
47           format of arg see "Pass Phrase Options" in openssl(1).
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49       -traditional
50           Normally a private key is written using standard format: this is
51           PKCS#8 form with the appropriate encryption algorithm (if any). If
52           the -traditional option is specified then the older "traditional"
53           format is used instead.
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55       -cipher
56           These options encrypt the private key with the supplied cipher. Any
57           algorithm name accepted by EVP_get_cipherbyname() is acceptable
58           such as des3.
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60       -text
61           Prints out the various public or private key components in plain
62           text in addition to the encoded version.
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64       -text_pub
65           Print out only public key components even if a private key is being
66           processed.
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68       -noout
69           Do not output the encoded version of the key.
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71       -pubin
72           By default a private key is read from the input file: with this
73           option a public key is read instead.
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75       -pubout
76           By default a private key is output: with this option a public key
77           will be output instead. This option is automatically set if the
78           input is a public key.
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80       -engine id
81           Specifying an engine (by its unique id string) will cause pkey to
82           attempt to obtain a functional reference to the specified engine,
83           thus initialising it if needed. The engine will then be set as the
84           default for all available algorithms.
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86       -check
87           This option checks the consistency of a key pair for both public
88           and private components.
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90       -pubcheck
91           This option checks the correctness of either a public key or the
92           public component of a key pair.
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EXAMPLES

95       To remove the pass phrase on an RSA private key:
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97        openssl pkey -in key.pem -out keyout.pem
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99       To encrypt a private key using triple DES:
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101        openssl pkey -in key.pem -des3 -out keyout.pem
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103       To convert a private key from PEM to DER format:
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105        openssl pkey -in key.pem -outform DER -out keyout.der
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107       To print out the components of a private key to standard output:
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109        openssl pkey -in key.pem -text -noout
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111       To print out the public components of a private key to standard output:
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113        openssl pkey -in key.pem -text_pub -noout
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115       To just output the public part of a private key:
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117        openssl pkey -in key.pem -pubout -out pubkey.pem
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SEE ALSO

120       genpkey(1), rsa(1), pkcs8(1), dsa(1), genrsa(1), gendsa(1)
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123       Copyright 2006-2021 The OpenSSL Project Authors. All Rights Reserved.
124
125       Licensed under the OpenSSL license (the "License").  You may not use
126       this file except in compliance with the License.  You can obtain a copy
127       in the file LICENSE in the source distribution or at
128       <https://www.openssl.org/source/license.html>.
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1321.1.1l                            2021-09-15                           PKEY(1)
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