BN_new, BN_init, BN_clear, BN_free, BN_clear_free -- allocate and free BIGNUMs
Synopsis
#include <openssl/bn.h>
BIGNUM *BN_new(void);
void BN_init(BIGNUM *);
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_init() initializes an
existing uninitialized BIGNUM.
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.
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.
RETURN VALUES
BN_new() returns a pointer to the BIGNUM. If the allocation fails, it returns
NULL and sets an error code that can
be obtained by ERR_get_error(3).
BN_init(), BN_clear(), BN_free() and BN_clear_free() have no return
values.
