openssl-rand - generate pseudo-random bytes

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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>.

3.4.1                                              2025-04-03                                 OPENSSL-RAND(1SSL)

       This command generates num random bytes using a cryptographically secure pseudo random number generator
       (CSPRNG). A suffix [K|M|G|T] may be appended to the num value to indicate the requested value be scaled
       as a multiple of KiB/MiB/GiB/TiB respectively. Note that suffixes are case sensitive, and that the
       suffixes represent binary multiples (K = 1024 bytes, M = 1024*1024 bytes, etc).

       The string 'max' may be substituted for a numerical value in num, to request the maximum number of bytes
       the CSPRNG can produce per instantiation.  Currently, this is restricted to 2^61 bytes as per NIST SP
       800-90C.

       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).

       The -engine option was deprecated in OpenSSL 3.0.

       openssl-rand - generate pseudo-random bytes

-help
           Print out a usage message.

       -outfile
           Write to file instead of standard output.

       -base64
           Perform base64 encoding on the output.

       -hex
           Show the output as a hex string.

       -engineid
           See "Engine Options" in openssl(1).  This option is deprecated.

       -randfiles, -writerandfile
           See "Random State Options" in openssl(1) for details.

       -providername-provider-pathpath-propquerypropq
           See "Provider Options" in openssl(1), provider(7), and property(7).

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

opensslrand [-help] [-outfile] [-base64] [-hex] [-engineid] [-randfiles] [-writerandfile] [-providername] [-provider-pathpath] [-propquerypropq] num[K|M|G|T]