openssl-prebuild/linux_amd64/share/man/man1/openssl-rsa.1
2020-03-02 16:50:34 +00:00

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.\" ========================================================================
.\"
.IX Title "OPENSSL-RSA 1"
.TH OPENSSL-RSA 1 "2020-03-02" "3.0.0-dev" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
openssl\-rsa \- RSA key processing tool
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBopenssl\fR \fBrsa\fR
[\fB\-help\fR]
[\fB\-inform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR]
[\fB\-outform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR]
[\fB\-in\fR \fIfilename\fR]
[\fB\-passin\fR \fIarg\fR]
[\fB\-out\fR \fIfilename\fR]
[\fB\-passout\fR \fIarg\fR]
[\fB\-aes128\fR]
[\fB\-aes192\fR]
[\fB\-aes256\fR]
[\fB\-aria128\fR]
[\fB\-aria192\fR]
[\fB\-aria256\fR]
[\fB\-camellia128\fR]
[\fB\-camellia192\fR]
[\fB\-camellia256\fR]
[\fB\-des\fR]
[\fB\-des3\fR]
[\fB\-idea\fR]
[\fB\-text\fR]
[\fB\-noout\fR]
[\fB\-modulus\fR]
[\fB\-check\fR]
[\fB\-pubin\fR]
[\fB\-pubout\fR]
[\fB\-RSAPublicKey_in\fR]
[\fB\-RSAPublicKey_out\fR]
[\fB\-engine\fR \fIid\fR]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This command has been deprecated.
The \fIopenssl\-pkey\fR\|(1) command should be used instead.
.PP
This command processes \s-1RSA\s0 keys. They can be converted between
various forms and their components printed out. \fBNote\fR this command uses the
traditional SSLeay compatible format for private key encryption: newer
applications should use the more secure PKCS#8 format using the
\&\fIopenssl\-pkcs8\fR\|(1) command.
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-help\fR" 4
.IX Item "-help"
Print out a usage message.
.IP "\fB\-inform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR, \fB\-outform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR" 4
.IX Item "-inform DER|PEM, -outform DER|PEM"
The input and formats; the default is \fB\s-1PEM\s0\fR.
See \*(L"Format Options\*(R" in \fIopenssl\fR\|(1) for details.
.IP "\fB\-inform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR" 4
.IX Item "-inform DER|PEM"
The data is a PKCS#1 \fBRSAPrivateKey\fR or \fBSubjectPublicKey\fR object.
On input, PKCS#8 format private keys are also accepted.
.IP "\fB\-in\fR \fIfilename\fR" 4
.IX Item "-in filename"
This specifies the input filename to read a key from or standard input if this
option is not specified. If the key is encrypted a pass phrase will be
prompted for.
.IP "\fB\-passin\fR \fIarg\fR, \fB\-passout\fR \fIarg\fR" 4
.IX Item "-passin arg, -passout arg"
The password source for the input and output file.
For more information about the format of \fBarg\fR
see \*(L"Pass Phrase Options\*(R" in \fIopenssl\fR\|(1).
.IP "\fB\-out\fR \fIfilename\fR" 4
.IX Item "-out filename"
This specifies the output filename to write a key to or standard output if this
option is not specified. If any encryption options are set then a pass phrase
will be prompted for. The output filename should \fBnot\fR be the same as the input
filename.
.IP "\fB\-aes128\fR, \fB\-aes192\fR, \fB\-aes256\fR, \fB\-aria128\fR, \fB\-aria192\fR, \fB\-aria256\fR, \fB\-camellia128\fR, \fB\-camellia192\fR, \fB\-camellia256\fR, \fB\-des\fR, \fB\-des3\fR, \fB\-idea\fR" 4
.IX Item "-aes128, -aes192, -aes256, -aria128, -aria192, -aria256, -camellia128, -camellia192, -camellia256, -des, -des3, -idea"
These options encrypt the private key with the specified
cipher before outputting it. A pass phrase is prompted for.
If none of these options is specified the key is written in plain text. This
means that this command can be used to remove the pass phrase from a key
by not giving any encryption option is given, or to add or change the pass
phrase by setting them.
These options can only be used with \s-1PEM\s0 format output files.
.IP "\fB\-text\fR" 4
.IX Item "-text"
Prints out the various public or private key components in
plain text in addition to the encoded version.
.IP "\fB\-noout\fR" 4
.IX Item "-noout"
This option prevents output of the encoded version of the key.
.IP "\fB\-modulus\fR" 4
.IX Item "-modulus"
This option prints out the value of the modulus of the key.
.IP "\fB\-check\fR" 4
.IX Item "-check"
This option checks the consistency of an \s-1RSA\s0 private key.
.IP "\fB\-pubin\fR" 4
.IX Item "-pubin"
By default a private key is read from the input file: with this
option a public key is read instead.
.IP "\fB\-pubout\fR" 4
.IX Item "-pubout"
By default a private key is output: with this option a public
key will be output instead. This option is automatically set if
the input is a public key.
.IP "\fB\-RSAPublicKey_in\fR, \fB\-RSAPublicKey_out\fR" 4
.IX Item "-RSAPublicKey_in, -RSAPublicKey_out"
Like \fB\-pubin\fR and \fB\-pubout\fR except \fBRSAPublicKey\fR format is used instead.
.IP "\fB\-engine\fR \fIid\fR" 4
.IX Item "-engine id"
See \*(L"Engine Options\*(R" in \fIopenssl\fR\|(1).
.SH "EXAMPLES"
.IX Header "EXAMPLES"
Examples equivalent to these can be found in the documentation for the
non-deprecated \fIopenssl\-pkey\fR\|(1) command.
.PP
To remove the pass phrase on an \s-1RSA\s0 private key:
.PP
.Vb 1
\& openssl rsa \-in key.pem \-out keyout.pem
.Ve
.PP
To encrypt a private key using triple \s-1DES:\s0
.PP
.Vb 1
\& openssl rsa \-in key.pem \-des3 \-out keyout.pem
.Ve
.PP
To convert a private key from \s-1PEM\s0 to \s-1DER\s0 format:
.PP
.Vb 1
\& openssl rsa \-in key.pem \-outform DER \-out keyout.der
.Ve
.PP
To print out the components of a private key to standard output:
.PP
.Vb 1
\& openssl rsa \-in key.pem \-text \-noout
.Ve
.PP
To just output the public part of a private key:
.PP
.Vb 1
\& openssl rsa \-in key.pem \-pubout \-out pubkey.pem
.Ve
.PP
Output the public part of a private key in \fBRSAPublicKey\fR format:
.PP
.Vb 1
\& openssl rsa \-in key.pem \-RSAPublicKey_out \-out pubkey.pem
.Ve
.SH "BUGS"
.IX Header "BUGS"
There should be an option that automatically handles \fI.key\fR files,
without having to manually edit them.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIopenssl\fR\|(1),
\&\fIopenssl\-pkey\fR\|(1),
\&\fIopenssl\-pkcs8\fR\|(1),
\&\fIopenssl\-dsa\fR\|(1),
\&\fIopenssl\-genrsa\fR\|(1),
\&\fIopenssl\-gendsa\fR\|(1)
.SH "HISTORY"
.IX Header "HISTORY"
This command was deprecated in OpenSSL 3.0.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2000\-2019 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.