OPENSSL-RAND - Online Linux Manual PageSection : 1SSL
Updated : 2022-08-14
Source : 3.0.5
Note : OpenSSL
NAMEopenssl−rand − generate pseudo−random bytes
SYNOPSISopenssl rand [−help] [−out file] [−base64] [−hex] [−engine id] [−rand files] [−writerand file] [−provider name] [−provider−path path] [−propquery propq] num
DESCRIPTIONThis command generates num random bytes using a cryptographically secure pseudo random number generator (CSPRNG). The random bytes are generated using the RAND_bytes (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 RAND_bytes (3), RAND (7), and EVP_RAND (7).
OPTIONS−help Print out a usage message. −out file Write to file instead of standard output. −base64 Perform base64 encoding on the output. −hex Show the output as a hex string. −engine id See ‟Engine Options” in openssl (1). This option is deprecated. −rand files, −writerand file See ‟Random State Options” in openssl (1) for details. −provider name −provider−path path −propquery propq See ‟Provider Options” in openssl (1), provider (7), and property (7).
SEE ALSOopenssl (1), RAND_bytes (3), RAND (7), EVP_RAND (7)
HISTORYThe −engine option was deprecated in OpenSSL 3.0.
COPYRIGHTCopyright 2000−2021 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>. 0
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