RAND(1SSL) OpenSSL RAND(1SSL)NAME
openssl-rand, rand - generate pseudo-random bytes
SYNOPSIS
openssl rand [-help] [-out file] [-rand file...] [-writerand file] [-base64] [-hex] num
DESCRIPTION
The rand command outputs num pseudo-random bytes after seeding the random number generator once. As in other openssl command line tools,
PRNG seeding uses the file $HOME/.rnd or .rnd in addition to the files given in the -rand option. A new $HOME/.rnd or .rnd file will be
written back if enough seeding was obtained from these sources.
OPTIONS -help
Print out a usage message.
-out file
Write to file instead of standard output.
-rand file...
A file or files containing random data used to seed the random number generator. Multiple files can be specified separated by an OS-
dependent character. The separator is ; for MS-Windows, , for OpenVMS, and : for all others.
[-writerand file]
Writes random data to the specified file upon exit. This can be used with a subsequent -rand flag.
-base64
Perform base64 encoding on the output.
-hex
Show the output as a hex string.
SEE ALSO RAND_bytes(3)COPYRIGHT
Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a
copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.
1.1.1a 2018-12-18 RAND(1SSL)
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GENDSA(1SSL) OpenSSL GENDSA(1SSL)NAME
openssl-gendsa, gendsa - generate a DSA private key from a set of parameters
SYNOPSIS
openssl gendsa [-help] [-out filename] [-aes128] [-aes192] [-aes256] [-aria128] [-aria192] [-aria256] [-camellia128] [-camellia192]
[-camellia256] [-des] [-des3] [-idea] [-rand file...] [-writerand file] [-engine id] [paramfile]
DESCRIPTION
The gendsa command generates a DSA private key from a DSA parameter file (which will be typically generated by the openssl dsaparam
command).
OPTIONS -help
Print out a usage message.
-out filename
Output the key to the specified file. If this argument is not specified then standard output is used.
-aes128, -aes192, -aes256, -aria128, -aria192, -aria256, -camellia128, -camellia192, -camellia256, -des, -des3, -idea
These options encrypt the private key with specified cipher before outputting it. A pass phrase is prompted for. If none of these
options is specified no encryption is used.
-rand file...
A file or files containing random data used to seed the random number generator. Multiple files can be specified separated by an OS-
dependent character. The separator is ; for MS-Windows, , for OpenVMS, and : for all others.
[-writerand file]
Writes random data to the specified file upon exit. This can be used with a subsequent -rand flag.
-engine id
Specifying an engine (by its unique id string) will cause gendsa to attempt to obtain a functional reference to the specified engine,
thus initialising it if needed. The engine will then be set as the default for all available algorithms.
paramfile
This option specifies the DSA parameter file to use. The parameters in this file determine the size of the private key. DSA parameters
can be generated and examined using the openssl dsaparam command.
NOTES
DSA key generation is little more than random number generation so it is much quicker that RSA key generation for example.
SEE ALSO dsaparam(1), dsa(1), genrsa(1), rsa(1)COPYRIGHT
Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a
copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.
1.1.1a 2018-12-18 GENDSA(1SSL)