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132 .TH PKEY 1 "2018-09-11" "1.1.1" "OpenSSL"
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134 .\" way too many mistakes in technical documents.
138 openssl\-pkey, pkey \- public or private key processing tool
140 .IX Header "SYNOPSIS"
141 \&\fBopenssl\fR \fBpkey\fR
143 [\fB\-inform PEM|DER\fR]
144 [\fB\-outform PEM|DER\fR]
145 [\fB\-in filename\fR]
147 [\fB\-out filename\fR]
148 [\fB\-passout arg\fR]
149 [\fB\-traditional\fR]
150 [\fB\-\f(BIcipher\fB\fR]
160 .IX Header "DESCRIPTION"
161 The \fBpkey\fR command processes public or private keys. They can be converted
162 between various forms and their components printed out.
167 Print out a usage message.
168 .IP "\fB\-inform DER|PEM\fR" 4
169 .IX Item "-inform DER|PEM"
170 This specifies the input format \s-1DER\s0 or \s-1PEM.\s0 The default format is \s-1PEM.\s0
171 .IP "\fB\-outform DER|PEM\fR" 4
172 .IX Item "-outform DER|PEM"
173 This specifies the output format, the options have the same meaning and default
174 as the \fB\-inform\fR option.
175 .IP "\fB\-in filename\fR" 4
176 .IX Item "-in filename"
177 This specifies the input filename to read a key from or standard input if this
178 option is not specified. If the key is encrypted a pass phrase will be
180 .IP "\fB\-passin arg\fR" 4
181 .IX Item "-passin arg"
182 The input file password source. For more information about the format of \fBarg\fR
183 see the \fB\s-1PASS PHRASE ARGUMENTS\s0\fR section in \fIopenssl\fR\|(1).
184 .IP "\fB\-out filename\fR" 4
185 .IX Item "-out filename"
186 This specifies the output filename to write a key to or standard output if this
187 option is not specified. If any encryption options are set then a pass phrase
188 will be prompted for. The output filename should \fBnot\fR be the same as the input
190 .IP "\fB\-passout password\fR" 4
191 .IX Item "-passout password"
192 The output file password source. For more information about the format of \fBarg\fR
193 see the \fB\s-1PASS PHRASE ARGUMENTS\s0\fR section in \fIopenssl\fR\|(1).
194 .IP "\fB\-traditional\fR" 4
195 .IX Item "-traditional"
196 Normally a private key is written using standard format: this is PKCS#8 form
197 with the appropriate encryption algorithm (if any). If the \fB\-traditional\fR
198 option is specified then the older \*(L"traditional\*(R" format is used instead.
199 .IP "\fB\-\f(BIcipher\fB\fR" 4
201 These options encrypt the private key with the supplied cipher. Any algorithm
202 name accepted by \fIEVP_get_cipherbyname()\fR is acceptable such as \fBdes3\fR.
205 Prints out the various public or private key components in
206 plain text in addition to the encoded version.
207 .IP "\fB\-text_pub\fR" 4
209 Print out only public key components even if a private key is being processed.
210 .IP "\fB\-noout\fR" 4
212 Do not output the encoded version of the key.
213 .IP "\fB\-pubin\fR" 4
215 By default a private key is read from the input file: with this
216 option a public key is read instead.
217 .IP "\fB\-pubout\fR" 4
219 By default a private key is output: with this option a public
220 key will be output instead. This option is automatically set if
221 the input is a public key.
222 .IP "\fB\-engine id\fR" 4
223 .IX Item "-engine id"
224 Specifying an engine (by its unique \fBid\fR string) will cause \fBpkey\fR
225 to attempt to obtain a functional reference to the specified engine,
226 thus initialising it if needed. The engine will then be set as the default
227 for all available algorithms.
228 .IP "\fB\-check\fR" 4
230 This option checks the consistency of a key pair for both public and private
232 .IP "\fB\-pubcheck\fR" 4
234 This option checks the correctness of either a public key or the public component
237 .IX Header "EXAMPLES"
238 To remove the pass phrase on an \s-1RSA\s0 private key:
241 \& openssl pkey \-in key.pem \-out keyout.pem
244 To encrypt a private key using triple \s-1DES:\s0
247 \& openssl pkey \-in key.pem \-des3 \-out keyout.pem
250 To convert a private key from \s-1PEM\s0 to \s-1DER\s0 format:
253 \& openssl pkey \-in key.pem \-outform DER \-out keyout.der
256 To print out the components of a private key to standard output:
259 \& openssl pkey \-in key.pem \-text \-noout
262 To print out the public components of a private key to standard output:
265 \& openssl pkey \-in key.pem \-text_pub \-noout
268 To just output the public part of a private key:
271 \& openssl pkey \-in key.pem \-pubout \-out pubkey.pem
274 .IX Header "SEE ALSO"
275 \&\fIgenpkey\fR\|(1), \fIrsa\fR\|(1), \fIpkcs8\fR\|(1),
276 \&\fIdsa\fR\|(1), \fIgenrsa\fR\|(1), \fIgendsa\fR\|(1)
278 .IX Header "COPYRIGHT"
279 Copyright 2006\-2017 The OpenSSL Project Authors. All Rights Reserved.
281 Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
282 this file except in compliance with the License. You can obtain a copy
283 in the file \s-1LICENSE\s0 in the source distribution or at
284 <https://www.openssl.org/source/license.html>.