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BN_new(3) 25/Sep/2002 (0.9.7e) 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() 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.
SEE ALSO
bn(3), ERR_get_error(3)
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.
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