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 the PASS PHRASE ARGUMENTS section 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 the PASS PHRASE ARGUMENTS section 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 2006-2017 The OpenSSL Project Authors. All Rights Reserved.
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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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1321.1.1c                            2019-05-28                           PKEY(1)
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