1PKEY(1)                             OpenSSL                            PKEY(1)
2
3
4

NAME

6       pkey - public or private key processing tool
7

SYNOPSIS

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

DESCRIPTION

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

COMMAND OPTIONS

18       -inform DER|PEM
19           This specifies the input format DER or PEM.
20
21       -outform DER|PEM
22           This specifies the output format, the options have the same meaning
23           as the -inform option.
24
25       -in filename
26           This specifies the input filename to read a key from or standard
27           input if this option is not specified. If the key is encrypted a
28           pass phrase will be prompted for.
29
30       -passin arg
31           the input file password source. For more information about the
32           format of arg see the PASS PHRASE ARGUMENTS section in openssl(1).
33
34       -out filename
35           This specifies the output filename to write a key to or standard
36           output if this option is not specified. If any encryption options
37           are set then a pass phrase will be prompted for. The output
38           filename should not be the same as the input filename.
39
40       -passout password
41           the output file password source. For more information about the
42           format of arg see the PASS PHRASE ARGUMENTS section in openssl(1).
43
44       -cipher
45           These options encrypt the private key with the supplied cipher. Any
46           algorithm name accepted by EVP_get_cipherbyname() is acceptable
47           such as des3.
48
49       -text
50           prints out the various public or private key components in plain
51           text in addition to the encoded version.
52
53       -text_pub
54           print out only public key components even if a private key is being
55           processed.
56
57       -noout
58           do not output the encoded version of the key.
59
60       -pubin
61           by default a private key is read from the input file: with this
62           option a public key is read instead.
63
64       -pubout
65           by default a private key is output: with this option a public key
66           will be output instead. This option is automatically set if the
67           input is a public key.
68
69       -engine id
70           specifying an engine (by its unique id string) will cause pkey to
71           attempt to obtain a functional reference to the specified engine,
72           thus initialising it if needed. The engine will then be set as the
73           default for all available algorithms.
74

EXAMPLES

76       To remove the pass phrase on an RSA private key:
77
78        openssl pkey -in key.pem -out keyout.pem
79
80       To encrypt a private key using triple DES:
81
82        openssl pkey -in key.pem -des3 -out keyout.pem
83
84       To convert a private key from PEM to DER format:
85
86        openssl pkey -in key.pem -outform DER -out keyout.der
87
88       To print out the components of a private key to standard output:
89
90        openssl pkey -in key.pem -text -noout
91
92       To print out the public components of a private key to standard output:
93
94        openssl pkey -in key.pem -text_pub -noout
95
96       To just output the public part of a private key:
97
98        openssl pkey -in key.pem -pubout -out pubkey.pem
99

SEE ALSO

101       genpkey(1), rsa(1), pkcs8(1), dsa(1), genrsa(1), gendsa(1)
102
103
104
1051.0.1e                            2013-02-11                           PKEY(1)