def ecssa_commit_and_sign(m, prv, c, eph_prv=None, hasher=sha256):
prv = int_from_prvkey(prv)
eph_prv = rfc6979(prv, m,
hasher) if eph_prv is None else int_from_prvkey(eph_prv)
R, eph_prv = tweak(eph_prv, c, hasher)
sig = ecssa_sign_raw(m, prv, eph_prv, hasher)
receipt = (sig[0], R)
return sig, receipt
def det_wallet2(key, r, i):
r_bytes = r.to_bytes(32, 'big')
i_bytes = i.to_bytes(32, 'big')
h_hex = sha256(i_bytes+r_bytes).hexdigest()
h_int = int(h_hex, 16)
try:
prvkey = int_from_prvkey(key)
return (prvkey + h_int) % ec.order
except:
pubkey = ec.tuple_from_point(key)
return ec.pointAdd(pubkey, ec.pointMultiply(h_int))
raise ValueError("Invalid key")
def ecssa_sign(m, prv, eph_prv=None, hasher=sha256) -> Tuple[int, int]:
if type(m) == str: m = hasher(m.encode()).digest()
prv = int_from_prvkey(prv)
eph_prv = rfc6979(prv, m,
hasher) if eph_prv is None else int_from_prvkey(eph_prv)
return ecssa_sign_raw(m, prv, eph_prv, hasher)