1OPENSSL-RAND(1ossl)                 OpenSSL                OPENSSL-RAND(1ossl)
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NAME

6       openssl-rand - generate pseudo-random bytes
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SYNOPSIS

9       openssl rand [-help] [-out file] [-base64] [-hex] [-engine id] [-rand
10       files] [-writerand file] [-provider name] [-provider-path path]
11       [-propquery propq] num
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DESCRIPTION

14       This command generates num random bytes using a cryptographically
15       secure pseudo random number generator (CSPRNG).
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17       The random bytes are generated using the RAND_bytes(3) function, which
18       provides a security level of 256 bits, provided it managed to seed
19       itself successfully from a trusted operating system entropy source.
20       Otherwise, the command will fail with a nonzero error code.  For more
21       details, see RAND_bytes(3), RAND(7), and EVP_RAND(7).
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OPTIONS

24       -help
25           Print out a usage message.
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27       -out file
28           Write to file instead of standard output.
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30       -base64
31           Perform base64 encoding on the output.
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33       -hex
34           Show the output as a hex string.
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36       -engine id
37           See "Engine Options" in openssl(1).  This option is deprecated.
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39       -rand files, -writerand file
40           See "Random State Options" in openssl(1) for details.
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42       -provider name
43       -provider-path path
44       -propquery propq
45           See "Provider Options" in openssl(1), provider(7), and property(7).
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SEE ALSO

48       openssl(1), RAND_bytes(3), RAND(7), EVP_RAND(7)
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HISTORY

51       The -engine option was deprecated in OpenSSL 3.0.
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54       Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
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56       Licensed under the Apache License 2.0 (the "License").  You may not use
57       this file except in compliance with the License.  You can obtain a copy
58       in the file LICENSE in the source distribution or at
59       <https://www.openssl.org/source/license.html>.
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633.0.9                             2023-07-27               OPENSSL-RAND(1ossl)
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