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RAND_GET0_PRIMARY(3ossl)	    OpenSSL	      RAND_GET0_PRIMARY(3ossl)

NAME
       RAND_get0_primary, RAND_get0_public, RAND_get0_private -	get access to
       the global EVP_RAND_CTX instances

SYNOPSIS
	#include <openssl/rand.h>

	EVP_RAND_CTX *RAND_get0_primary(OSSL_LIB_CTX *ctx);
	EVP_RAND_CTX *RAND_get0_public(OSSL_LIB_CTX *ctx);
	EVP_RAND_CTX *RAND_get0_private(OSSL_LIB_CTX *ctx);

DESCRIPTION
       The default RAND	API implementation (RAND_OpenSSL()) utilizes three
       shared DRBG instances which are accessed	via the	RAND API:

       The public and private DRBG are thread-local instances, which are used
       by RAND_bytes() and RAND_priv_bytes(), respectively.  The primary DRBG
       is a global instance, which is not intended to be used directly,	but is
       used internally to reseed the other two instances.

       These functions here provide access to the shared DRBG instances.

RETURN VALUES
       RAND_get0_primary() returns a pointer to	the primary DRBG instance for
       the given OSSL_LIB_CTX ctx.

       RAND_get0_public() returns a pointer to the public DRBG instance	for
       the given OSSL_LIB_CTX ctx.

       RAND_get0_private() returns a pointer to	the private DRBG instance for
       the given OSSL_LIB_CTX ctx.

       In all the above	cases the ctx parameter	can be NULL in which case the
       default OSSL_LIB_CTX is used.

NOTES
       It is not thread-safe to	access the primary DRBG	instance.  The public
       and private DRBG	instance can be	accessed safely, because they are
       thread-local. Note however, that	changes	to these two instances apply
       only to the current thread.

       For that	reason it is recommended not to	change the settings of these
       three instances directly.  Instead, an application should change	the
       default settings	for new	DRBG instances at initialization time, before
       creating	additional threads.

       During initialization, it is possible to	change the reseed interval and
       reseed time interval.  It is also possible to exchange the reseeding
       callbacks entirely.

       To set the type of DRBG that will be instantiated, use the
       RAND_set_DRBG_type(3) call before accessing the random number
       generation infrastructure.

SEE ALSO
       EVP_RAND(3), RAND_set_DRBG_type(3)

HISTORY
       These functions were added in OpenSSL 3.0.

COPYRIGHT
       Copyright 2020-2021 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>.

3.0.2+quic			  2022-03-15	      RAND_GET0_PRIMARY(3ossl)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | NOTES | SEE ALSO | HISTORY | COPYRIGHT

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