BN_new

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HP Open Source Security for OpenVMS Volume 2:...

CRYPTO Application Programming Interface (API)...

BN_mod_mul_reciprocal

BN_num_bits

BN_new

Description
Return Values
See Also
History

NAME

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() allocated 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.