RAND_SET_DRBG_TYPE(3ossl) OpenSSL RAND_SET_DRBG_TYPE(3ossl)
NAME
RAND_set_DRBG_type, RAND_set_seed_source_type - specify the global
random number generator types
SYNOPSIS
#include <openssl/rand.h>
int RAND_set_DRBG_type(OSSL_LIB_CTX *ctx, const char *drbg, const char *propq,
const char *cipher, const char *digest);
int RAND_set_seed_source_type(OSSL_LIB_CTX *ctx, const char *seed,
const char *propq);
DESCRIPTION
RAND_set_DRBG_type(3) specifies the random bit generator that will be
used within the library context ctx. A generator of name drbg with
properties propq will be fetched. It will be instantiated with either
cipher or digest as its underlying cryptographic algorithm. This
specifies the type that will be used for the primary, public and
private random instances.
RAND_set_seed_source_type() specifies the seed source that will be used
within the library context ctx. The seed source of name seed with
properties propq will be fetched and used to seed the primary random
bit generator.
RETURN VALUES
These function return 1 on success and 0 on failure.
NOTES
These functions must be called before the random bit generators are
first created in the library context. They will return an error if the
call is made too late.
The default DRBG is "CTR-DRBG" using the "AES-256-CTR" cipher.
The default seed source can be configured when OpenSSL is compiled by
setting -DOPENSSL_DEFAULT_SEED_SRC=SEED-SRC. If not set then "SEED-SRC"
is used.
EXAMPLES
unsigned char bytes[100];
RAND_set_seed_source_type(NULL, "JITTER", NULL);
RAND_bytes(bytes, 100);
SEE ALSO
EVP_RAND(3), RAND_get0_primary(3)
HISTORY
These functions were added in OpenSSL 3.0.
COPYRIGHT
Copyright 2021-2024 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>.
3.4.0 2024-10-29 RAND_SET_DRBG_TYPE(3ossl)
openssl 3.4.0 - Generated Thu Nov 14 13:10:18 CST 2024