def __init__(self):

with open('files/MiMC_settings.json') as fp:

micmcSettings = json.load(fp)

self.p = micmcSettings['p']

self.k = micmcSettings['k']

self.c_values = micmcSettings['c']

self.nRounds = micmcSettings['n']

def __feistel(self, inL, inR, k):

lastL, lastR = inL, inR

for i in range(self.nRounds):

mask = (lastR k self.c_values[i]) % self.p

mask5 = pow(mask, 5, self.p)

lastL, lastR = lastR, (lastL mask5) % self.p

return lastL, lastR

def hash(self, m):

lastR = lastC = 0

for i in range(len(m)):

lastR = (lastR m[i]) % self.p

lastR, lastC = self.__feistel(lastR, lastC, self.k)