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BN_new(3)                                          OpenSSL                                         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
       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.



50                                               2013-03-05                                        BN_new(3)