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BN_NEW(3)			    OpenSSL			     BN_NEW(3)

NAME
       BN_new, BN_secure_new, BN_clear,	BN_free, BN_clear_free - allocate and
       free BIGNUMs

SYNOPSIS
	#include <openssl/bn.h>

	BIGNUM *BN_new(void);

	BIGNUM *BN_secure_new(void);

	void BN_clear(BIGNUM *a);

	void BN_free(BIGNUM *a);

	void BN_clear_free(BIGNUM *a);

DESCRIPTION
       BN_new()	allocates and initializes a BIGNUM structure.  BN_secure_new()
       does the	same except that the secure heap OPENSSL_secure_malloc(3) is
       used to store the value.

       BN_clear() is used to destroy sensitive data such as keys when they are
       no longer needed. It erases the memory used by a	and sets it to the
       value 0.	 If a is NULL, nothing is done.

       BN_free() frees the components of the BIGNUM, and if it was created by
       BN_new(), also the structure itself. BN_clear_free() additionally
       overwrites the data before the memory is	returned to the	system.	 If a
       is NULL,	nothing	is done.

RETURN VALUES
       BN_new()	and BN_secure_new() return a pointer to	the BIGNUM initialised
       to the value 0.	If the allocation fails, they return NULL and set an
       error code that can be obtained by ERR_get_error(3).

       BN_clear(), BN_free() and BN_clear_free() have no return	values.

SEE ALSO
       ERR_get_error(3), OPENSSL_secure_malloc(3)

HISTORY
       BN_init() was removed in	OpenSSL	1.1.0; use BN_new() instead.

COPYRIGHT
       Copyright 2000-2019 The OpenSSL Project Authors.	All Rights Reserved.

       Licensed	under the OpenSSL license (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>.

1.1.1d				  2019-09-10			     BN_NEW(3)

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

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