1 .\" $NetBSD: openssl_pkey.1,v 1.14 2015/06/12 17:01:15 christos Exp $
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135 .\" ========================================================================
138 .TH PKEY 1 "2009-07-19" "1.0.1n" "OpenSSL"
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144 pkey \- public or private key processing tool
148 .IX Header "SYNOPSIS"
149 \&\fBopenssl\fR \fBpkey\fR
150 [\fB\-inform PEM|DER\fR]
151 [\fB\-outform PEM|DER\fR]
152 [\fB\-in filename\fR]
154 [\fB\-out filename\fR]
155 [\fB\-passout arg\fR]
164 .IX Header "DESCRIPTION"
165 The \fBpkey\fR command processes public or private keys. They can be converted
166 between various forms and their components printed out.
167 .SH "COMMAND OPTIONS"
168 .IX Header "COMMAND OPTIONS"
169 .IP "\fB\-inform DER|PEM\fR" 4
170 .IX Item "-inform DER|PEM"
171 This specifies the input format \s-1DER\s0 or \s-1PEM.\s0
172 .IP "\fB\-outform DER|PEM\fR" 4
173 .IX Item "-outform DER|PEM"
174 This specifies the output format, the options have the same meaning as the
175 \&\fB\-inform\fR option.
176 .IP "\fB\-in filename\fR" 4
177 .IX Item "-in filename"
178 This specifies the input filename to read a key from or standard input if this
179 option is not specified. If the key is encrypted a pass phrase will be
181 .IP "\fB\-passin arg\fR" 4
182 .IX Item "-passin arg"
183 the input file password source. For more information about the format of \fBarg\fR
184 see the \fB\s-1PASS PHRASE ARGUMENTS\s0\fR section in \fIopenssl\fR\|(1).
185 .IP "\fB\-out filename\fR" 4
186 .IX Item "-out filename"
187 This specifies the output filename to write a key to or standard output if this
188 option is not specified. If any encryption options are set then a pass phrase
189 will be prompted for. The output filename should \fBnot\fR be the same as the input
191 .IP "\fB\-passout password\fR" 4
192 .IX Item "-passout password"
193 the output file password source. For more information about the format of \fBarg\fR
194 see the \fB\s-1PASS PHRASE ARGUMENTS\s0\fR section in \fIopenssl\fR\|(1).
195 .IP "\fB\-cipher\fR" 4
197 These options encrypt the private key with the supplied cipher. Any algorithm
198 name accepted by \fIEVP_get_cipherbyname()\fR is acceptable such as \fBdes3\fR.
201 prints out the various public or private key components in
202 plain text in addition to the encoded version.
203 .IP "\fB\-text_pub\fR" 4
205 print out only public key components even if a private key is being processed.
206 .IP "\fB\-noout\fR" 4
208 do not output the encoded version of the key.
209 .IP "\fB\-pubin\fR" 4
211 by default a private key is read from the input file: with this
212 option a public key is read instead.
213 .IP "\fB\-pubout\fR" 4
215 by default a private key is output: with this option a public
216 key will be output instead. This option is automatically set if
217 the input is a public key.
218 .IP "\fB\-engine id\fR" 4
219 .IX Item "-engine id"
220 specifying an engine (by its unique \fBid\fR string) will cause \fBpkey\fR
221 to attempt to obtain a functional reference to the specified engine,
222 thus initialising it if needed. The engine will then be set as the default
223 for all available algorithms.
225 .IX Header "EXAMPLES"
226 To remove the pass phrase on an \s-1RSA\s0 private key:
229 \& openssl pkey \-in key.pem \-out keyout.pem
232 To encrypt a private key using triple \s-1DES:\s0
235 \& openssl pkey \-in key.pem \-des3 \-out keyout.pem
238 To convert a private key from \s-1PEM\s0 to \s-1DER\s0 format:
241 \& openssl pkey \-in key.pem \-outform DER \-out keyout.der
244 To print out the components of a private key to standard output:
247 \& openssl pkey \-in key.pem \-text \-noout
250 To print out the public components of a private key to standard output:
253 \& openssl pkey \-in key.pem \-text_pub \-noout
256 To just output the public part of a private key:
259 \& openssl pkey \-in key.pem \-pubout \-out pubkey.pem
262 .IX Header "SEE ALSO"
263 \&\fIgenpkey\fR\|(1), \fIopenssl_rsa\fR\|(1), \fIopenssl_pkcs8\fR\|(1),
264 \&\fIopenssl_dsa\fR\|(1), \fIopenssl_genrsa\fR\|(1), \fIopenssl_gendsa\fR\|(1)