openssl-rand - generate pseudo-random bytes
openssl rand [-help] [-out file] [-rand file...] [-writerand file] [-base64] [-hex] num
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.
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.
Perform base64 encoding on the output.
Show the output as a hex string.
Copyright 2000-2019 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (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.