def check_mul(self, val: int, n: Integer):
Q = self.curve.O.project()
while val:
if val & 1:
Q = Q + self
assert Q.z != 0 and n.gcd(Q.z)
self = self + self
val >>= 1
return Q
def _sign(self, M, K):
if (not hasattr(self, 'x')):
raise TypeError('Private key not available in this object')
p1=self.p-1
K = Integer(K)
if (K.gcd(p1)!=1):
raise ValueError('Bad K value: GCD(K,p-1)!=1')
a=pow(self.g, K, self.p)
t=(Integer(M)-self.x*a) % p1
while t<0: t=t+p1
b=(t*K.inverse(p1)) % p1
return [int(a), int(b)]
def _sign(self, M, K):
if (not hasattr(self, 'x')):
raise TypeError('Private key not available in this object')
p1=self.p-1
K = Integer(K)
if (K.gcd(p1)!=1):
raise ValueError('Bad K value: GCD(K,p-1)!=1')
a=pow(self.g, K, self.p)
t=(Integer(M)-self.x*a) % p1
while t<0: t=t+p1
b=(t*K.inverse(p1)) % p1
return map(int, (a, b))
