def BLS_H(m):
h = hashlib.shake_256()
h.update(bytes(m, 'utf-8'))
hm = big.from_bytes(h.digest(curve.EFS))
HM = ECp()
while not HM.set(hm):
hm = hm + 1
HM = curve.CurveCof * HM
return HM
def H(mpin_id):
p = curve.p
h = hashlib.new(curve.SHA)
h.update(bytes(mpin_id, 'utf-8'))
x = big.from_bytes(h.digest())
x %= p
P = ECp()
while not P.set(x):
x = x + 1
P = curve.CurveCof * P
return P