1RAND_SET_DRBG_TYPE(3ossl)           OpenSSL          RAND_SET_DRBG_TYPE(3ossl)
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NAME

6       RAND_set_DRBG_type, RAND_set_seed_source_type - specify the global
7       random number generator types
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SYNOPSIS

10        #include <openssl/rand.h>
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12        int RAND_set_DRBG_type(OSSL_LIB_CTX *ctx, const char *drbg, const char *propq,
13                               const char *cipher, const char *digest);
14        int RAND_set_seed_source_type(OSSL_LIB_CTX *ctx, const char *seed,
15                                      const char *propq);
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DESCRIPTION

18       RAND_set_DRBG_type() specifies the random bit generator that will be
19       used within the library context ctx.  A generator of name drbg with
20       properties propq will be fetched.  It will be instantiated with either
21       cipher or digest as its underlying cryptographic algorithm.  This
22       specifies the type that will be used for the primary, public and
23       private random instances.
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25       RAND_set_seed_source_type() specifies the seed source that will be used
26       within the library context ctx.  The seed source of name seed with
27       properties propq will be fetched and used to seed the primary random
28       big generator.
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RETURN VALUES

31       These function return 1 on success and 0 on failure.
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NOTES

34       These functions must be called before the random bit generators are
35       first created in the library context.  They will return an error if the
36       call is made too late.
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38       The default DRBG is "CTR-DRBG" using the "AES-256-CTR" cipher.
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40       The default seed source is "SEED-SRC".
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SEE ALSO

43       EVP_RAND(3), RAND_get0_primary(3)
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HISTORY

46       These functions were added in OpenSSL 3.0.
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49       Copyright 2021 The OpenSSL Project Authors. All Rights Reserved.
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51       Licensed under the Apache License 2.0 (the "License").  You may not use
52       this file except in compliance with the License.  You can obtain a copy
53       in the file LICENSE in the source distribution or at
54       <https://www.openssl.org/source/license.html>.
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583.0.5                             2022-11-01         RAND_SET_DRBG_TYPE(3ossl)
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