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49131a7d DSH |
1 | =pod |
2 | ||
018aaeb4 RS |
3 | =begin comment |
4 | {- join("\n", @autowarntext) -} | |
5 | ||
6 | =end comment | |
7 | ||
49131a7d DSH |
8 | =head1 NAME |
9 | ||
4b537191 | 10 | openssl-pkey - public or private key processing command |
49131a7d DSH |
11 | |
12 | =head1 SYNOPSIS | |
13 | ||
14 | B<openssl> B<pkey> | |
169394d4 | 15 | [B<-help>] |
6d382c74 | 16 | [B<-inform> B<DER>|B<PEM>|B<P12>|B<ENGINE>] |
e8769719 RS |
17 | [B<-outform> B<DER>|B<PEM>] |
18 | [B<-in> I<filename>] | |
19 | [B<-passin> I<arg>] | |
20 | [B<-out> I<filename>] | |
21 | [B<-passout> I<arg>] | |
05dba815 | 22 | [B<-traditional>] |
8dc57d76 | 23 | [B<-I<cipher>>] |
49131a7d DSH |
24 | [B<-text>] |
25 | [B<-text_pub>] | |
26 | [B<-noout>] | |
27 | [B<-pubin>] | |
28 | [B<-pubout>] | |
2aee35d3 | 29 | [B<-check>] |
b0004708 | 30 | [B<-pubcheck>] |
92fee421 P |
31 | [B<-ec_conv_form> I<arg>] |
32 | [B<-ec_param_enc> I<arg>] | |
018aaeb4 | 33 | {- $OpenSSL::safe::opt_engine_synopsis -} |
6bd4e3f2 | 34 | {- $OpenSSL::safe::opt_provider_synopsis -} |
49131a7d | 35 | |
9f3c076b | 36 | =for openssl ifdef engine |
1738c0ce | 37 | |
49131a7d DSH |
38 | =head1 DESCRIPTION |
39 | ||
35a810bb RL |
40 | This command processes public or private keys. They can be |
41 | converted between various forms and their components printed out. | |
49131a7d | 42 | |
3dfda1a6 | 43 | =head1 OPTIONS |
49131a7d DSH |
44 | |
45 | =over 4 | |
46 | ||
169394d4 MR |
47 | =item B<-help> |
48 | ||
49 | Print out a usage message. | |
50 | ||
6d382c74 | 51 | =item B<-inform> B<DER>|B<PEM>|B<P12>|B<ENGINE> |
49131a7d | 52 | |
6d382c74 DDO |
53 | The key input format; the default is B<PEM>. |
54 | The only value with effect is B<ENGINE>; all others have become obsolete. | |
55 | See L<openssl(1)/Format Options> for details. | |
56 | ||
57 | =item B<-outform> B<DER>|B<PEM> | |
58 | ||
59 | The key output formats; the default is B<PEM>. | |
777182a0 | 60 | See L<openssl(1)/Format Options> for details. |
49131a7d | 61 | |
e8769719 | 62 | =item B<-in> I<filename> |
49131a7d DSH |
63 | |
64 | This specifies the input filename to read a key from or standard input if this | |
65 | option is not specified. If the key is encrypted a pass phrase will be | |
66 | prompted for. | |
67 | ||
3a4e43de | 68 | =item B<-passin> I<arg>, B<-passout> I<arg> |
49131a7d | 69 | |
3a4e43de RS |
70 | The password source for the input and output file. |
71 | For more information about the format of B<arg> | |
72 | see L<openssl(1)/Pass Phrase Options>. | |
49131a7d | 73 | |
e8769719 | 74 | =item B<-out> I<filename> |
49131a7d DSH |
75 | |
76 | This specifies the output filename to write a key to or standard output if this | |
77 | option is not specified. If any encryption options are set then a pass phrase | |
78 | will be prompted for. The output filename should B<not> be the same as the input | |
79 | filename. | |
80 | ||
05dba815 DSH |
81 | =item B<-traditional> |
82 | ||
c4de074e | 83 | Normally a private key is written using standard format: this is PKCS#8 form |
05dba815 DSH |
84 | with the appropriate encryption algorithm (if any). If the B<-traditional> |
85 | option is specified then the older "traditional" format is used instead. | |
86 | ||
8dc57d76 | 87 | =item B<-I<cipher>> |
49131a7d DSH |
88 | |
89 | These options encrypt the private key with the supplied cipher. Any algorithm | |
90 | name accepted by EVP_get_cipherbyname() is acceptable such as B<des3>. | |
91 | ||
92 | =item B<-text> | |
93 | ||
c4de074e | 94 | Prints out the various public or private key components in |
1bc74519 | 95 | plain text in addition to the encoded version. |
49131a7d DSH |
96 | |
97 | =item B<-text_pub> | |
98 | ||
c4de074e | 99 | Print out only public key components even if a private key is being processed. |
49131a7d DSH |
100 | |
101 | =item B<-noout> | |
102 | ||
c4de074e | 103 | Do not output the encoded version of the key. |
49131a7d DSH |
104 | |
105 | =item B<-pubin> | |
106 | ||
c4de074e | 107 | By default a private key is read from the input file: with this |
49131a7d DSH |
108 | option a public key is read instead. |
109 | ||
110 | =item B<-pubout> | |
111 | ||
c4de074e | 112 | By default a private key is output: with this option a public |
49131a7d DSH |
113 | key will be output instead. This option is automatically set if |
114 | the input is a public key. | |
115 | ||
2aee35d3 PY |
116 | =item B<-check> |
117 | ||
118 | This option checks the consistency of a key pair for both public and private | |
119 | components. | |
120 | ||
b0004708 PY |
121 | =item B<-pubcheck> |
122 | ||
123 | This option checks the correctness of either a public key or the public component | |
124 | of a key pair. | |
125 | ||
92fee421 P |
126 | =item B<-ec_conv_form> I<arg> |
127 | ||
128 | This option only applies to elliptic curve based public and private keys. | |
129 | ||
130 | This specifies how the points on the elliptic curve are converted | |
131 | into octet strings. Possible values are: B<compressed> (the default | |
132 | value), B<uncompressed> and B<hybrid>. For more information regarding | |
133 | the point conversion forms please read the X9.62 standard. | |
134 | B<Note> Due to patent issues the B<compressed> option is disabled | |
135 | by default for binary curves and can be enabled by defining | |
136 | the preprocessor macro B<OPENSSL_EC_BIN_PT_COMP> at compile time. | |
137 | ||
138 | =item B<-ec_param_enc> I<arg> | |
139 | ||
140 | This option only applies to elliptic curve based public and private keys. | |
141 | ||
142 | This specifies how the elliptic curve parameters are encoded. | |
143 | Possible value are: B<named_curve>, i.e. the ec parameters are | |
144 | specified by an OID, or B<explicit> where the ec parameters are | |
145 | explicitly given (see RFC 3279 for the definition of the | |
146 | EC parameters structures). The default value is B<named_curve>. | |
147 | B<Note> the B<implicitlyCA> alternative, as specified in RFC 3279, | |
148 | is currently not implemented in OpenSSL. | |
149 | ||
018aaeb4 RS |
150 | {- $OpenSSL::safe::opt_engine_item -} |
151 | ||
6bd4e3f2 P |
152 | {- $OpenSSL::safe::opt_provider_item -} |
153 | ||
49131a7d DSH |
154 | =back |
155 | ||
156 | =head1 EXAMPLES | |
157 | ||
35eb4588 | 158 | To remove the pass phrase on a private key: |
49131a7d DSH |
159 | |
160 | openssl pkey -in key.pem -out keyout.pem | |
161 | ||
162 | To encrypt a private key using triple DES: | |
163 | ||
164 | openssl pkey -in key.pem -des3 -out keyout.pem | |
165 | ||
1bc74519 | 166 | To convert a private key from PEM to DER format: |
49131a7d DSH |
167 | |
168 | openssl pkey -in key.pem -outform DER -out keyout.der | |
169 | ||
170 | To print out the components of a private key to standard output: | |
171 | ||
172 | openssl pkey -in key.pem -text -noout | |
173 | ||
174 | To print out the public components of a private key to standard output: | |
175 | ||
176 | openssl pkey -in key.pem -text_pub -noout | |
177 | ||
178 | To just output the public part of a private key: | |
179 | ||
180 | openssl pkey -in key.pem -pubout -out pubkey.pem | |
181 | ||
92fee421 P |
182 | To change the EC parameters encoding to B<explicit>: |
183 | ||
184 | openssl pkey -in key.pem -ec_param_enc explicit -out keyout.pem | |
185 | ||
186 | To change the EC point conversion form to B<compressed>: | |
187 | ||
188 | openssl pkey -in key.pem -ec_conv_form compressed -out keyout.pem | |
189 | ||
49131a7d DSH |
190 | =head1 SEE ALSO |
191 | ||
b6b66573 DMSP |
192 | L<openssl(1)>, |
193 | L<openssl-genpkey(1)>, | |
194 | L<openssl-rsa(1)>, | |
195 | L<openssl-pkcs8(1)>, | |
196 | L<openssl-dsa(1)>, | |
197 | L<openssl-genrsa(1)>, | |
198 | L<openssl-gendsa(1)> | |
49131a7d | 199 | |
0f221d9c P |
200 | =head1 HISTORY |
201 | ||
202 | The B<-engine> option was deprecated in OpenSSL 3.0. | |
203 | ||
e2f92610 RS |
204 | =head1 COPYRIGHT |
205 | ||
33388b44 | 206 | Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved. |
e2f92610 | 207 | |
449040b4 | 208 | Licensed under the Apache License 2.0 (the "License"). You may not use |
e2f92610 RS |
209 | this file except in compliance with the License. You can obtain a copy |
210 | in the file LICENSE in the source distribution or at | |
211 | L<https://www.openssl.org/source/license.html>. | |
212 | ||
213 | =cut |