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