python3实现AES ECB

# 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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