ECCTool

Main fuctions:

1.generate curvers, computer np/order; 2.trap small ecdlp (< 64 bits), using kangaroo method; 3.generate keypairs. 4.ECDSA/ECNR sign/verify.

Support curves:

1. support curve bits: 32-1024;
2. support elliptic curve over GF(p);
3. support elliptic curve over GF(2^m), with irreducible ploy: Trinomial: f(t)=t^m + t^a + 1, Pentanomial: f(t) = t^m + t^a + t^b + t^c + 1
4. support NIST-recommended elliptic curves.