BNzero(3) OpenSSL BNzero(3)

NAME
       BNzero, BNone, BNvalueone, BNsetword, BNgetword - BIGNUM
       assignment operations

SYNOPSIS
        #include 

        int BNzero(BIGNUM *a);
        int BNone(BIGNUM *a);

        const BIGNUM *BNvalueone(void);

        int BNsetword(BIGNUM *a, unsigned long w);
        unsigned long BNgetword(BIGNUM *a);

DESCRIPTION
       BNzero(), BNone() and BNsetword() set aa to the values 0, 1 and ww
       respectively.  BNzero() and BNone() are macros.

       BNvalueone() returns a BBIIGGNNUUMM constant of value 1. This constant is
       useful for use in comparisons and assignment.

       BNgetword() returns aa, if it can be represented as an unsigned long.

RETURN VALUES
       BNgetword() returns the value aa, and 0xffffffffL if aa cannot be
       represented as an unsigned long.

       BNzero(), BNone() and BNsetword() return 1 on success, 0 otherwise.
       BNvalueone() returns the constant.

BUGS
       Someone might change the constant.

       If a BBIIGGNNUUMM is equal to 0xffffffffL it can be represented as an
       unsigned long but this value is also returned on error.

SEE ALSO
       bn(3), BNbn2bin(3)

HISTORY       BNzero(), BNone() and BNsetword() are available in all versions of
       SSLeay and OpenSSL. BNvalueone() and BNgetword() were added in
       SSLeay 0.8.

       BNvalueone() was changed to return a true const BIGNUM * in OpenSSL
       0.9.7.



0.9.7l                            2002-07-18                        BNzero(3)