The ECField class implements one of the interfaces to select
compiled in parameters. I am curious as to how much slower
it would be if these parameters were variables which could
be changed at runtime. It would be handy to select the
field size at runtime by specifying GF_M. This class simulates
using runtime parameters. This will also require changing ECField
to move static parameters into another class, so I haven't
done it yet.

Dimension of the large finite field (GF_M = GF_L*GF_K). */

Dimension of the small finite field. */

Degree of the large field reduction trinomial. */

Intermediate power of the reduction trinomial. */

Reduction polynomial for the small field (truncated). */

Element of the large field with nonzero trace. */

Size of trace mask. */

1st nonzero element of trace mask. */

2nd nonzero element of trace mask. */

Scalar term of elliptic curve equation (y^2 + xy = x^3 + EC_B). */

Cofactor of the selected elliptic curve point G. */

MQV modulus (ceil (lg(r)/2), where r is the prime order of G). */