---

rand.1ssl

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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" openssl\-rand, rand \- generate pseudo\-random bytes .SH "SYNOPSIS" .IX Header "SYNOPSIS" \&\fBopenssl rand\fR [\fB\-help\fR] [\fB\-out\fR \fIfile\fR] [\fB\-rand file...\fR] [\fB\-writerand file\fR] [\fB\-base64\fR] [\fB\-hex\fR] \&\fInum\fR .SH "DESCRIPTION" .IX Header "DESCRIPTION" This command generates \fInum\fR random bytes using a cryptographically secure pseudo random number generator (\s-1CSPRNG\s0). .PP The random bytes are generated using the \fBRAND_bytes\fR\|(3) function, which provides a security level of 256 bits, provided it managed to seed itself successfully from a trusted operating system entropy source. Otherwise, the command will fail with a nonzero error code. For more details, see \fBRAND_bytes\fR\|(3), \s-1\fBRAND\s0\fR\|(7), and \s-1\fBRAND_DRBG\s0\fR\|(7). .SH "OPTIONS" .IX Header "OPTIONS" .IP "\fB\-help\fR" 4 .IX Item "-help" Print out a usage message. .IP "\fB\-out file\fR" 4 .IX Item "-out file" Write to \fIfile\fR instead of standard output. .IP "\fB\-rand file...\fR" 4 .IX Item "-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 \fB;\fR for MS-Windows, \fB,\fR for OpenVMS, and \fB:\fR for all others. Explicitly specifying a seed file is in general not necessary, see the \&\*(L"\s-1NOTES\*(R"\s0 section for more information. .IP "[\fB\-writerand file\fR]" 4 .IX Item "[-writerand file]" Writes random data to the specified \fIfile\fR upon exit. This can be used with a subsequent \fB\-rand\fR flag. .IP "\fB\-base64\fR" 4 .IX Item "-base64" Perform base64 encoding on the output. .IP "\fB\-hex\fR" 4 .IX Item "-hex" Show the output as a hex string. .SH "NOTES" .IX Header "NOTES" Prior to OpenSSL 1.1.1, it was common for applications to store information about the state of the random-number generator in a file that was loaded at startup and rewritten upon exit. On modern operating systems, this is generally no longer necessary as OpenSSL will seed itself from a trusted entropy source provided by the operating system. The \fB\-rand\fR and \&\fB\-writerand\fR flags are still supported for special platforms or circumstances that might require them. .PP It is generally an error to use the same seed file more than once and every use of \fB\-rand\fR should be paired with \fB\-writerand\fR. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBRAND_bytes\fR\|(3), \&\s-1\fBRAND\s0\fR\|(7), \&\s-1\fBRAND_DRBG\s0\fR\|(7) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2000\-2020 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.

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docroot: /home/induvedam/public_html

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curdir: /opt/alt/openssl11/share/man/man1

	.		4096
	..		66
X	CA.pl.1ssl		12369
X	asn1parse.1ssl		11210
X	c_rehash.1ssl		8775
X	ca.1ssl		33480
X	ciphers.1ssl		38208
X	cms.1ssl		32716
X	crl.1ssl		7679
X	crl2pkcs7.1ssl		7440
X	dgst.1ssl		11901
X	dhparam.1ssl		9318
X	dsa.1ssl		10014
X	dsaparam.1ssl		8002
X	ec.1ssl		10893
X	ecparam.1ssl		10197
X	enc.1ssl		19923
X	engine.1ssl		7350
X	errstr.1ssl		5082
X	gendsa.1ssl		7124
X	genpkey.1ssl		16064
X	genrsa.1ssl		8252
X	list.1ssl		6498
X	nseq.1ssl		6395
X	ocsp.1ssl		24152
X	openssl-asn1parse.1ssl		11210
X	openssl-c_rehash.1ssl		8775
X	openssl-ca.1ssl		33480
X	openssl-ciphers.1ssl		38208
X	openssl-cms.1ssl		32716
X	openssl-crl.1ssl		7679
X	openssl-crl2pkcs7.1ssl		7440
X	openssl-dgst.1ssl		11901
X	openssl-dhparam.1ssl		9318
X	openssl-dsa.1ssl		10014
X	openssl-dsaparam.1ssl		8002
X	openssl-ec.1ssl		10893
X	openssl-ecparam.1ssl		10197
X	openssl-enc.1ssl		19923
X	openssl-engine.1ssl		7350
X	openssl-errstr.1ssl		5082
X	openssl-gendsa.1ssl		7124
X	openssl-genpkey.1ssl		16064
X	openssl-genrsa.1ssl		8252
X	openssl-list.1ssl		6498
X	openssl-nseq.1ssl		6395
X	openssl-ocsp.1ssl		24152
X	openssl-passwd.1ssl		7348
X	openssl-pkcs12.1ssl		18330
X	openssl-pkcs7.1ssl		7274
X	openssl-pkcs8.1ssl		16030
X	openssl-pkey.1ssl		9022
X	openssl-pkeyparam.1ssl		6323
X	openssl-pkeyutl.1ssl		16252
X	openssl-prime.1ssl		5509
X	openssl-rand.1ssl		6838
X	openssl-rehash.1ssl		8775
X	openssl-req.1ssl		30490
X	openssl-rsa.1ssl		10668
X	openssl-rsautl.1ssl		10955
X	openssl-s_client.1ssl		37152
X	openssl-s_server.1ssl		35119
X	openssl-s_time.1ssl		12387
X	openssl-sess_id.1ssl		9064
X	openssl-smime.1ssl		23612
X	openssl-speed.1ssl		7189
X	openssl-spkac.1ssl		8733
X	openssl-srp.1ssl		5933
X	openssl-storeutl.1ssl		7660
X	openssl-ts.1ssl		28698
X	openssl-tsget.1ssl		11430
X	openssl-verify.1ssl		34023
X	openssl-version.1ssl		5481
X	openssl-x509.1ssl		38496
X	openssl.1ssl		21596
X	passwd.1ssl		7348
X	pkcs12.1ssl		18330
X	pkcs7.1ssl		7274
X	pkcs8.1ssl		16030
X	pkey.1ssl		9022
X	pkeyparam.1ssl		6323
X	pkeyutl.1ssl		16252
X	prime.1ssl		5509
X	rand.1ssl		6838
X	rehash.1ssl		8775
X	req.1ssl		30490
X	rsa.1ssl		10668
X	rsautl.1ssl		10955
X	s_client.1ssl		37152
X	s_server.1ssl		35119
X	s_time.1ssl		12387
X	sess_id.1ssl		9064
X	smime.1ssl		23612
X	speed.1ssl		7189
X	spkac.1ssl		8733
X	srp.1ssl		5933
X	storeutl.1ssl		7660
X	ts.1ssl		28698
X	tsget.1ssl		11430
X	verify.1ssl		34023
X	version.1ssl		5481
X	x509.1ssl		38496