def TEA_decryption(vs, ks):
delta = 0x9E3779B9
v0, v1 = map(uint32, unpack('>2I', vs))
k0, k1, k2, k3 = map(uint32, unpack('>4I', ks))
sm, delta = uint32(delta * 32), uint32(delta)
for i in range(32):
v1.value -= ((v0.value << 4) + k2.value) ^ (v0.value + sm.value) ^ (
(v0.value >> 5) + k3.value)
v0.value -= ((v1.value << 4) + k0.value) ^ (v1.value + sm.value) ^ (
(v1.value >> 5) + k1.value)
sm.value -= delta.value
return pack('>2I', v0.value, v1.value)
def myhash(self, msg, identification):
delta = 0x9E3779B9
v0, v1 = map(uint32, unpack('>2I', msg))
k0, k1, k2, k3 = map(uint32, unpack('>4I', identification))
sm, delta = uint32(0), uint32(delta)
for i in range(32):
sm.value += delta.value
v0.value += (
(v1.value << 4) + k0.value) ^ (v1.value + sm.value) ^ (
(v1.value >> 5) + k1.value)
v1.value += (
(v0.value << 4) + k2.value) ^ (v0.value + sm.value) ^ (
(v0.value >> 5) + k3.value)
return pack('>2I', v0.value, v1.value)
def tea_decrypt(ciphertext, key, delta=0x9E3779B9):
'''
Decrypt a ciphertext using TEA algorithm.
ciphertext: 64 bits length bytes-like object.
key: 128 bits length bytes-like object.
Return a 64 bits length bytes object.
'''
v0, v1 = map(uint32, unpack('>2I', ciphertext))
k0, k1, k2, k3 = map(uint32, unpack('>4I', key))
sm, delta = uint32(0xC6EF3720), uint32(delta)
for i in range(32):
v1.value -= ((v0.value << 4) + k2.value) ^ (v0.value + sm.value) ^ (
(v0.value >> 5) + k3.value)
v0.value -= ((v1.value << 4) + k0.value) ^ (v1.value + sm.value) ^ (
(v1.value >> 5) + k1.value)
sm.value -= delta.value
return pack('>2I', v0.value, v1.value)
def tea_encrypt(plaintext, key, delta=0x9E3779B9):
'''
Encrypt a plaintext using TEA algorithm.
plaintext: 64 bits length bytes-like object.
key: 128 bits length bytes-like object.
Return a 64 bits length bytes object.
'''
v0, v1 = map(uint32, unpack('>2I', plaintext))
k0, k1, k2, k3 = map(uint32, unpack('>4I', key))
sm, delta = uint32(0), uint32(delta)
for i in range(32):
sm.value += delta.value
v0.value += ((v1.value << 4) + k0.value) ^ (v1.value + sm.value) ^ (
(v1.value >> 5) + k1.value)
v1.value += ((v0.value << 4) + k2.value) ^ (v0.value + sm.value) ^ (
(v0.value >> 5) + k3.value)
return pack('>2I', v0.value, v1.value)
def xtea_decrypt(ciphertext, key):
'''
Decrypt a ciphertext using XTEA algorithm.
ciphertext: 64 bits length bytes-like object.
key: 128 bits length bytes-like object.
Return a 64 bits length bytes object.
'''
v0, v1 = map(uint32, unpack('>2I', ciphertext))
k = tuple(map(uint32, unpack('>4I', key)))
sm, delta = uint32(0xC6EF3720), uint32(0x9E3779B9)
for i in range(32):
v1.value -= (((v0.value << 4) ^ (v0.value >> 5)) +
v0.value) ^ (sm.value + k[(sm.value >> 11) & 3].value)
sm.value -= delta.value
v0.value -= (
((v1.value << 4) ^
(v1.value >> 5)) + v1.value) ^ (sm.value + k[sm.value & 3].value)
return pack('>2I', v0.value, v1.value)
def __next(self):
t = uint32(self.state[3])
t = uint32(t.value ^ t.value << 11)
t = uint32(t.value ^ t.value >> 8)
self.state[3] = self.state[2]
self.state[2] = self.state[1]
self.state[1] = self.state[0]
s = uint32(self.state[0])
t = uint32(t.value ^ s.value)
t = uint32(t.value ^ s.value >> 19)
self.state[0] = t.value
return t.value
import random
from ctypes import c_int32 as int32, c_uint32 as uint32
i = lambda k: h(g(t(k)))
l = lambda k: k < 20 and 1518500249 or (k < 40 and 1859775393 or (k < 60 and -1894007588 or -899497514))
o = lambda k, z: int32(k << z).value | int32(uint32(k).value >> (32 - z)).value
def t(A):
l = len(A)
k = ((l + 8) >> 6) + 1
B = [0] * (k * 16)
for z in range(l):
B[z >> 2] |= ord(A[z]) << (24 - (z & 3) * 8)
z += 1
B[z >> 2] |= 128 << (24 - (z & 3) * 8)
B[z >> 2] = int32(B[z >> 2]).value
B[- 1] = l * 8
return B
def g(N):
K = N
L = [0] * 80
J = 1732584193
I = -271733879
H = -1732584194
G = 271733878
F = -1009589776
for C in range(0, len(K), 16):
import random
from ctypes import c_int32 as int32, c_uint32 as uint32
i = lambda k: h(g(t(k)))
l = lambda k: k < 20 and 1518500249 or (k < 40 and 1859775393 or
(k < 60 and -1894007588 or -899497514))
o = lambda k, z: int32(k << z).value | int32(uint32(k).value >> (32 - z)).value
def t(A):
l = len(A)
k = ((l + 8) >> 6) + 1
B = [0] * (k * 16)
for z in range(l):
B[z >> 2] |= ord(A[z]) << (24 - (z & 3) * 8)
z += 1
B[z >> 2] |= 128 << (24 - (z & 3) * 8)
B[z >> 2] = int32(B[z >> 2]).value
B[-1] = l * 8
return B
def g(N):
K = N
L = [0] * 80
J = 1732584193
I = -271733879
H = -1732584194
G = 271733878
F = -1009589776
for C in range(0, len(K), 16):