Add new elliptic curves & Implement ECDSA public key recovery from signature #11
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Added point type template argument.
Added new methods to `ec_point_fp`: - compute_y: solves curve equation y^2 = x^3 + ax + b (mod p) and returns y - decompress_point: same as compute_y but returns point from x and computed y - encode_point/decode_point: encodes/decodes point to/from bytes following SEC1-v2 2.3.3 specification
Define new elliptic curves: brainpoolP256r1, brainpoolP320r1, brainpoolP384r1, brainpoolP512r1, secp384r1 & secp521r1
Added algorithm for recovering public key from ECDSA signature.
Changed github action OS to Ubuntu to 22.04. Increased CTest timeout to 50 minutes for the `ack_ecc_tests` test.
Fixed freeing and deep copying `ddata_` from rhs, and fixed `clear` method to free `ddata_`.
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Changes
brainpoolP256r1,brainpoolP320r1,brainpoolP384r1,brainpoolP512r1,sepc384r1,sepc521r1ec_curve_fp: Added functions for decompressing, encoding & decoding EC pointbigint