NAME
rand - generate pseudo-random bytes
SYNOPSIS
openssl rand [
-out
file] [
-rand
file(s)] [
-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
-
-out
file
-
Write to
file instead of standard output.
-
-rand
file(s)
-
Use specified file or files or EGD socket (see
RAND_egd(3)) for seeding the random number generator. Multiple files can be specified separated by a OS-dependent character. The separator is
; for MS-Windows,
, for OpenVMS, and
: for all others.
-
-base64
-
Perform base64 encoding on the output.
-
-hex
-
Show the output as a hex string.
SEE ALSO
RAND_bytes(3)