237 lines
7.8 KiB
Groff
Executable File
237 lines
7.8 KiB
Groff
Executable File
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.\" ========================================================================
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.\"
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.IX Title "OPENSSL-GENRSA 1"
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.TH OPENSSL-GENRSA 1 "2020-03-02" "3.0.0-dev" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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openssl\-genrsa \- generate an RSA private key
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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\&\fBopenssl\fR \fBgenrsa\fR
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[\fB\-help\fR]
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[\fB\-out\fR \fIfilename\fR]
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[\fB\-passout\fR \fIarg\fR]
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[\fB\-aes128\fR]
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[\fB\-aes192\fR]
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[\fB\-aes256\fR]
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[\fB\-aria128\fR]
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[\fB\-aria192\fR]
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[\fB\-aria256\fR]
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[\fB\-camellia128\fR]
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[\fB\-camellia192\fR]
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[\fB\-camellia256\fR]
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[\fB\-des\fR]
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[\fB\-des3\fR]
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[\fB\-idea\fR]
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[\fB\-F4\fR]
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[\fB\-f4\fR]
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[\fB\-3\fR]
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[\fB\-primes\fR \fInum\fR]
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[\fB\-verbose\fR]
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[\fB\-rand\fR \fIfiles\fR]
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[\fB\-writerand\fR \fIfile\fR]
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[\fB\-engine\fR \fIid\fR]
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[\fBnumbits\fR]
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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This command has been deprecated.
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The \fIopenssl\-genpkey\fR\|(1) command should be used instead.
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.PP
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This command generates an \s-1RSA\s0 private key.
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.SH "OPTIONS"
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.IX Header "OPTIONS"
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.IP "\fB\-help\fR" 4
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.IX Item "-help"
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Print out a usage message.
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.IP "\fB\-out\fR \fIfilename\fR" 4
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.IX Item "-out filename"
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Output the key to the specified file. If this argument is not specified then
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standard output is used.
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.IP "\fB\-passout\fR \fIarg\fR" 4
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.IX Item "-passout arg"
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The output file password source. For more information about the format
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see \*(L"Pass Phrase Options\*(R" in \fIopenssl\fR\|(1).
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.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
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.IX Item "-aes128, -aes192, -aes256, -aria128, -aria192, -aria256, -camellia128, -camellia192, -camellia256, -des, -des3, -idea"
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These options encrypt the private key with specified
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cipher before outputting it. If none of these options is
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specified no encryption is used. If encryption is used a pass phrase is prompted
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for if it is not supplied via the \fB\-passout\fR argument.
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.IP "\fB\-F4\fR, \fB\-f4\fR, \fB\-3\fR" 4
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.IX Item "-F4, -f4, -3"
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The public exponent to use, either 65537 or 3. The default is 65537.
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.IP "\fB\-primes\fR \fInum\fR" 4
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.IX Item "-primes num"
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Specify the number of primes to use while generating the \s-1RSA\s0 key. The \fInum\fR
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parameter must be a positive integer that is greater than 1 and less than 16.
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If \fInum\fR is greater than 2, then the generated key is called a 'multi\-prime'
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\&\s-1RSA\s0 key, which is defined in \s-1RFC\s0 8017.
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.IP "\fB\-verbose\fR" 4
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.IX Item "-verbose"
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Print extra details about the operations being performed.
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.IP "\fB\-rand\fR \fIfiles\fR, \fB\-writerand\fR \fIfile\fR" 4
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.IX Item "-rand files, -writerand file"
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See \*(L"Random State Options\*(R" in \fIopenssl\fR\|(1) for details.
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.IP "\fB\-engine\fR \fIid\fR" 4
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.IX Item "-engine id"
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See \*(L"Engine Options\*(R" in \fIopenssl\fR\|(1).
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.IP "\fBnumbits\fR" 4
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.IX Item "numbits"
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The size of the private key to generate in bits. This must be the last option
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specified. The default is 2048 and values less than 512 are not allowed.
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.SH "NOTES"
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.IX Header "NOTES"
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\&\s-1RSA\s0 private key generation essentially involves the generation of two or more
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prime numbers. When generating a private key various symbols will be output to
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indicate the progress of the generation. A \fB.\fR represents each number which
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has passed an initial sieve test, \fB+\fR means a number has passed a single
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round of the Miller-Rabin primality test, \fB*\fR means the current prime starts
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a regenerating progress due to some failed tests. A newline means that the number
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has passed all the prime tests (the actual number depends on the key size).
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.PP
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Because key generation is a random process the time taken to generate a key
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may vary somewhat. But in general, more primes lead to less generation time
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of a key.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIopenssl\fR\|(1),
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\&\fIopenssl\-genpkey\fR\|(1),
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\&\fIopenssl\-gendsa\fR\|(1)
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.SH "HISTORY"
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.IX Header "HISTORY"
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This command was deprecated in OpenSSL 3.0.
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2000\-2019 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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