bn_new(3)
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() 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.
SEE ALSO
HISTORY
- BN_new(), BN_clear(), BN_free() and BN_clear_free() are available in
all versions on SSLeay and OpenSSL. BN_init() was added in SSLeay
0.9.1b.