def validate_public_key(qk):
'''Check whether public key qk is valid'''
bits, q = qk
x, y = q
bits, cn, n, cp, cq, g = get_curve(bits)
return q and 0 < x < cn and 0 < y < cn and \
element(q, cp, cq, cn) and (mulp(cp, cq, cn, q, n) == None)
def validate_public_key(qk):
'''Check whether public key qk is valid'''
bits, q = qk
x, y = q
bits, cn, n, cp, cq, g = get_curve(bits)
return q and 0 < x < cn and 0 < y < cn and \
element(q, cp, cq, cn) and (mulp(cp, cq, cn, q, n) == None)
def check_public_key(self, other_key):
"""
Check the other party's public key to make sure it's valid.
"""
if (
other_key is not None
and other_key[0] >= 0
and other_key[0] <= self.params["p"] - 1
and other_key[1] >= 0
and other_key[1] <= self.params["p"] - 1
and ec.element(other_key, self.params["a"], self.params["b"], self.params["p"])
):
return True
return False