Python3.6实现AES(ECB)

python3实现AES ECB

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# coding:utf-8
import copy
import math

'''
test_state: 0x3243f6a8, 0x885a308d, 0x313198a2, 0xe0370734
test_cipher key: 0x2b7e1516, 0x28aed2a6, 0xabf71588, 0x09cf4f3c
'''
class EncryptionAES:
'''
pass
'''
key = []
plaintext = []
wheels_number = 10 # 加密轮数
sbox = [
[0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76],
[0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0],
[0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15],
[0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75],
[0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84],
[0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf],
[0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8],
[0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2],
[0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73],
[0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb],
[0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79],
[0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08],
[0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a],
[0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e],
[0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf],
[0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16]
]
rcon = [
[0x01, 0x00, 0x00, 0x00],
[0x02, 0x00, 0x00, 0x00],
[0x04, 0x00, 0x00, 0x00],
[0x08, 0x00, 0x00, 0x00],
[0x10, 0x00, 0x00, 0x00],
[0x20, 0x00, 0x00, 0x00],
[0x40, 0x00, 0x00, 0x00],
[0x80, 0x00, 0x00, 0x00],
[0x1b, 0x00, 0x00, 0x00],
[0x36, 0x00, 0x00, 0x00]
]
def __init__(self, plaintext):
self.plaintext = plaintext.encode()
for x in range((int(math.fabs((len(self.plaintext) % 16) - 16)))):
self.plaintext += '\x00'.encode()

def __get_plaintext(self):
t = 0
while t < len(self.plaintext):
yield self.plaintext[t:t+16]
t += 16

def set_number_of_encrypt_wheels(self, wheels_number):
'''
设置加密轮数,默认10,待定
'''
self.wheels_number = wheels_number

def __get_state(self, text):
n = []
x = 0
for _ in range(4):
l = []
for _ in range(4):
l.append(text[x])
x += 1
n.append(l)
return n

def set_key(self, key):
'''
pass
'''
key = key.encode()
key_length = int(len(key))
len_key = [16, 24]
# 密钥长度不正确处理
if key_length not in len_key:
return False
tmp = 0
for _ in range(int(key_length / 4)):
t = []
for _ in range(4):
t.append(key[tmp])
tmp += 1
self.key.append(t)
for x in range(4, 4 * (self.wheels_number + 1)):
if x % 4 == 0:
tmp = self.key[x - 1][:]
tmp.append(tmp[0])
tmp.pop(0)
for y in range(4):
tmp[y] = self.__get_sbox_value(tmp[y])
for y in range(4):
tmp[y] = self.key[x-4][y] ^ tmp[y] ^ self.rcon[int(x/4) - 1][y]
self.key.append(tmp)
else:
l = []
for y in range(4):
l.append(self.key[x - 1][y] ^ self.key[x - 4][y])
self.key.append(l)

def __get_sbox_value(self, value):
return self.sbox[(value & 0xf0) >> 4][value & 0x0f]

def get_ciphertext(self):
'''
pass
'''
ciphertext = ''
for text in self.__get_plaintext():
state = self.__get_state(text)
self.__wheel_key_add(state, 0)
for x in range(1, self.wheels_number):
self.__subbytes(state)
state = self.__shift_rows(state)
self.__mix_columns(state)
self.__wheel_key_add(state, x)
self.__subbytes(state)
state = self.__shift_rows(state)
self.__wheel_key_add(state, self.wheels_number)
for x in range(4):
for y in range(4):
t = hex(state[x][y]).split('0x')[-1]
if len(t) == 1:
ciphertext += '0'+t
else:
ciphertext += t
return ciphertext

def __shift_rows(self, state):
'''
行移位
参数state:分组列表
'''
state = list(map(list, zip(*state)))
for x in range(1, 4):
for y in range(x):
state[x].append(state[x][0])
state[x].pop(0)
state = list(map(list, zip(*state)))
return state

def __subbytes(self, state):
# 完成
for x in range(4):
for y in range(4):
state[x][y] = self.__get_sbox_value(state[x][y])

def __mix_columns(self, state):
for x in range(4):
tmp = state[x][:]
state[x][0] = self.__ffmul(0x02, tmp[0]) ^ self.__ffmul(0x03, tmp[1]) ^ tmp[2] ^ tmp[3]
state[x][1] = tmp[0] ^ self.__ffmul(0x02, tmp[1]) ^ self.__ffmul(0x03, tmp[2]) ^ tmp[3]
state[x][2] = tmp[0] ^ tmp[1] ^ self.__ffmul(0x02, tmp[2]) ^ self.__ffmul(0x03, tmp[3])
state[x][3] = self.__ffmul(0x03, tmp[0]) ^ tmp[1] ^ tmp[2] ^ self.__ffmul(0x02, tmp[3])

def __ffmul(self, x, y):
if x == 0x02:
if y >= 0x80:
return ((y << 1) ^ 0x0100 ^ 0x1b)
else:
return (y << 1)
elif x == 0x03:
return (self.__ffmul(0x02, y) ^ y)
else:
return 0x00

def __wheel_key_add(self, state, number):
# 完成
for x in range(4):
for y in range(4):
state[x][y] = state[x][y] ^ self.key[4 * number+x][y]

class DecryptionAES:
'''
AES-128 ECB 解密(填充\x00)
'''
wheels_number = 10
reverse_sbox = [
[0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb],
[0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb],
[0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e],
[0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25],
[0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92],
[0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84],
[0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06],
[0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b],
[0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73],
[0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e],
[0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b],
[0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4],
[0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f],
[0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef],
[0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61],
[0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d]
]
rcon = [
[0x01, 0x00, 0x00, 0x00],
[0x02, 0x00, 0x00, 0x00],
[0x04, 0x00, 0x00, 0x00],
[0x08, 0x00, 0x00, 0x00],
[0x10, 0x00, 0x00, 0x00],
[0x20, 0x00, 0x00, 0x00],
[0x40, 0x00, 0x00, 0x00],
[0x80, 0x00, 0x00, 0x00],
[0x1b, 0x00, 0x00, 0x00],
[0x36, 0x00, 0x00, 0x00]
]
sbox = [
[0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76],
[0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0],
[0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15],
[0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75],
[0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84],
[0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf],
[0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8],
[0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2],
[0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73],
[0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb],
[0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79],
[0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08],
[0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a],
[0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e],
[0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf],
[0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16]
]
key = []
def __init__(self, ciphertext, ciphertext_format):
'''
ciphertext_format = ['hex']
'''
self.ciphertext = []
if ciphertext_format == 'hex':
t = 0
while t < len(ciphertext):
l = []
for x in range(4):
l.append(int(ciphertext[t:t+2], 16))
t += 2
self.ciphertext.append(l)


def __get_sbox_value(self, value):
'''通过8位二进制返回sbox值'''
return self.sbox[(value & 0xf0) >> 4][value & 0x0f]

def __get_ciphertext(self):
'''迭代128位密文'''
for x in range(0, len(self.ciphertext), 4):
yield self.ciphertext[x:x+4]

def __wheel_key_add(self, state, number):
'''密钥轮加'''
for x in range(4):
for y in range(4):
state[x][y] = state[x][y] ^ self.key[4 * number+x][y]

def __get_state(self, text):
n = []
x = 0
for _ in range(4):
l = []
for _ in range(4):
l.append(text[x])
x += 1
n.append(l)
return n

def get_plaintext(self):
plaintext = ''
for text in self.__get_ciphertext():
state = text
self.__wheel_key_add(state, self.wheels_number)
for x in range(self.wheels_number-1, 0, -1):
state = self.__reverse_shift_rows(state)
self.__reverse_subbytes(state)
self.__wheel_key_add(state, x)
self.__reverse_mix_columns(state)
state = self.__reverse_shift_rows(state)
self.__reverse_subbytes(state)
self.__wheel_key_add(state, 0)
for x in range(4):
for y in range(4):
plaintext += chr(state[x][y])

return plaintext.strip('\x00')

def __reverse_mix_columns(self, state):
for x in range(4):
tmp = state[x][:]
state[x][0] = (self.__xtime(self.__xtime(self.__xtime(tmp[0]))) ^ self.__xtime(self.__xtime(tmp[0])) ^ self.__xtime(tmp[0])) ^ (self.__xtime(self.__xtime(self.__xtime(tmp[1]))) ^ self.__xtime(tmp[1]) ^ tmp[1]) ^ (self.__xtime(self.__xtime(self.__xtime(tmp[2]))) ^ self.__xtime(self.__xtime(tmp[2])) ^ tmp[2]) ^ (self.__xtime(self.__xtime(self.__xtime(tmp[3]))) ^ tmp[3])
state[x][1] = (self.__xtime(self.__xtime(self.__xtime(tmp[0]))) ^ tmp[0]) ^ (self.__xtime(self.__xtime(self.__xtime(tmp[1]))) ^ self.__xtime(self.__xtime(tmp[1])) ^ self.__xtime(tmp[1])) ^ (self.__xtime(self.__xtime(self.__xtime(tmp[2]))) ^ self.__xtime(tmp[2]) ^ tmp[2]) ^ (self.__xtime(self.__xtime(self.__xtime(tmp[3]))) ^ self.__xtime(self.__xtime(tmp[3])) ^ tmp[3])
state[x][2] = (self.__xtime(self.__xtime(self.__xtime(tmp[0]))) ^ self.__xtime(self.__xtime(tmp[0])) ^ tmp[0]) ^ (self.__xtime(self.__xtime(self.__xtime(tmp[1]))) ^ tmp[1]) ^ (self.__xtime(self.__xtime(self.__xtime(tmp[2]))) ^self.__xtime(self.__xtime(tmp[2])) ^ self.__xtime(tmp[2])) ^ (self.__xtime(self.__xtime(self.__xtime(tmp[3]))) ^ self.__xtime(tmp[3]) ^ tmp[3])
state[x][3] = (self.__xtime(self.__xtime(self.__xtime(tmp[0]))) ^ self.__xtime(tmp[0]) ^ tmp[0]) ^ (self.__xtime(self.__xtime(self.__xtime(tmp[1]))) ^ self.__xtime(self.__xtime(tmp[1])) ^ tmp[1]) ^ (self.__xtime(self.__xtime(self.__xtime(tmp[2]))) ^ tmp[2]) ^ (self.__xtime(self.__xtime(self.__xtime(tmp[3]))) ^ self.__xtime(self.__xtime(tmp[3])) ^ self.__xtime(tmp[3]))

def __xtime(self, x):
if x >= 0x80:
return ((x << 1) ^ 0x0100 ^ 0x1b)
else:
return (x << 1)

def __reverse_subbytes(self, state):
for x in range(4):
for y in range(4):
state[x][y] = self.__get_reversesbox_value(state[x][y])

def __reverse_shift_rows(self, state):
'''

'''
state = list(map(list, zip(*state)))
for x in range(1, 4):
for y in range(x):
state[x].insert(0, state[x][-1])
state[x].pop()
state = list(map(list, zip(*state)))
return state


def set_key(self, key):
'''
设置密钥,扩展密钥, 长度规定为128(, 192, 256)
key:密钥
'''
key = key.encode()
key_length = int(len(key))
# len_key = [16, 24, 32]
len_key = [16]
# 密钥长度不正确处理
if key_length not in len_key:
return False
tmp = 0
for _ in range(int(key_length / 4)):
t = []
for _ in range(4):
t.append(key[tmp])
tmp += 1
self.key.append(t)

for x in range(4, 4 * (self.wheels_number + 1)):
if x % 4 == 0:
tmp = self.key[x - 1][:]
tmp.append(tmp[0])
tmp.pop(0)
for y in range(4):
tmp[y] = self.__get_sbox_value(tmp[y])
for y in range(4):
tmp[y] = self.key[x-4][y] ^ tmp[y] ^ self.rcon[int(x/4) - 1][y]
self.key.append(tmp)
else:
l = []
for y in range(4):
l.append(self.key[x - 1][y] ^ self.key[x - 4][y])
self.key.append(l)

def __get_reversesbox_value(self, value):
'''
通过8位二进制返回逆sbox值
'''
return self.reverse_sbox[(value & 0xf0) >> 4][value & 0x0f]
key = 'abcdefghijklmnop'
string = 'eriltugvnaiosjevtgoaeujfcvmoqaj4otyivu00'
print('明文字符串:', string)
print('密钥:', key)
a = EncryptionAES(string)
a.set_key(key)
print('加密结果:', a.get_ciphertext())
a.get_ciphertext()
a = DecryptionAES(a.get_ciphertext(), 'hex')
a.set_key(key)
print('解密结果: ', a.get_plaintext())

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