def dict_attack():
found = False
for p in pass_list:
v = pow(g, sha256().intdigest(salt + p.encode()), N)
s = pow(pk * pow(v, u, N), b, N)
k = sha256().digest(int2bytes(s))
if sha256().hmac(salt, k).hex() == hmac:
found = True
break
return p if found else None
def decrypt(self, msg, tobytes=False):
if type(msg) == bytes:
msg = int.from_bytes(msg, 'big')
msg = pow(msg, self.d, self.n)
return int2bytes(msg) if tobytes else msg
def decrypt_unpadded(ct, oracle):
e, n = oracle.publickey()
ct_new = (pow(2, e, n) * ct) % n # s = 2
pt_new = oracle.decrypt(ct_new)
pt = pt_new * invmod(2, n) % n
return int2bytes(pt)
def session_key(self, pk):
s = pow(int(pk, 16) * pow(self.v, self.u, N), self.priv, N)
self.key = sha256().digest(int2bytes(s))
def session_key(self, pk):
u = sha256().intdigest(bytes.fromhex(pk) + self.publickey())
s = pow(int(pk, 16) * pow(self.v, u, N), self.priv, N)
self.key = sha256().digest(int2bytes(s))
def publickey(self, tobytes=True):
if tobytes:
return int2bytes(k * self.v + super().publickey(False))
return k * self.v + super().publickey(False)
def session_key(self, salt, pk, u):
self.salt = salt
x = sha256().intdigest(salt + P)
s = pow(pk, self.priv + u * x, N)
self.key = sha256().digest(int2bytes(s))
