openssl-rand - generate pseudo-random bytes
openssl rand [-help] [-out file] [-base64] [-hex] [-engine id] [-rand files] [-writerand file] [-provider name] [-provider-path path] [-propquery propq] num
This 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).
- Print out a usage message.
- -out file
- Write to file instead of standard output.
- Perform base64 encoding on the output.
- 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).
The -engine option was deprecated in OpenSSL 3.0.
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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.