forked from cory/tildefriends
Cory McWilliams
09ddfffa6b
git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4088 ed5197a5-7fde-0310-b194-c3ffbd925b24
244 lines
8.1 KiB
Groff
244 lines
8.1 KiB
Groff
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.\" ========================================================================
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.\"
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.IX Title "GENRSA 1"
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.TH GENRSA 1 "2020-04-21" "1.1.1g" "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, 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 filename\fR]
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[\fB\-passout arg\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\-3\fR]
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[\fB\-rand file...\fR]
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[\fB\-writerand file\fR]
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[\fB\-engine id\fR]
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[\fB\-primes num\fR]
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[\fBnumbits\fR]
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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The \fBgenrsa\fR 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 filename\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 arg\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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of \fBarg\fR see the \fB\s-1PASS PHRASE ARGUMENTS\s0\fR section in \fBopenssl\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|\-3\fR" 4
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.IX Item "-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\-rand file...\fR" 4
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.IX Item "-rand file..."
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A file or files containing random data used to seed the random number
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generator.
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Multiple files can be specified separated by an OS-dependent character.
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The separator is \fB;\fR for MS-Windows, \fB,\fR for OpenVMS, and \fB:\fR for
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all others.
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.IP "[\fB\-writerand file\fR]" 4
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.IX Item "[-writerand file]"
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Writes random data to the specified \fIfile\fR upon exit.
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This can be used with a subsequent \fB\-rand\fR flag.
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.IP "\fB\-engine id\fR" 4
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.IX Item "-engine id"
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Specifying an engine (by its unique \fBid\fR string) will cause \fBgenrsa\fR
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to attempt to obtain a functional reference to the specified engine,
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thus initialising it if needed. The engine will then be set as the default
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for all available algorithms.
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.IP "\fB\-primes num\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 \fBnum\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 \fBnum\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 8017.\s0
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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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\&\fBgendsa\fR\|(1)
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2000\-2018 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the OpenSSL license (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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