BNmodinverse(3) OpenSSL BNmodinverse(3)

NAME
       BNmodinverse - compute inverse modulo n

SYNOPSIS
        #include 

        BIGNUM *BNmodinverse(BIGNUM *r, BIGNUM *a, const BIGNUM *n,
                  BNCTX *ctx);

DESCRIPTION
       BNmodinverse() computes the inverse of aa modulo nn places the result
       in rr ("(a*r)%n==1"). If rr is NULL, a new BBIIGGNNUUMM is created.

       ccttxx is a previously allocated BBNNCCTTXX used for temporary variables. rr
       may be the same BBIIGGNNUUMM as aa or nn.

RETURN VALUES
       BNmodinverse() returns the BBIIGGNNUUMM containing the inverse, and NULL on
       error. The error codes can be obtained by ERRgeterror(3).

SEE ALSO
       bn(3), ERRgeterror(3), BNadd(3)

HISTORY       BNmodinverse() is available in all versions of SSLeay and OpenSSL.



0.9.7l                            2002-09-25                 BNmodinverse(3)