python實現AES加密演算法
阿新 • • 發佈：2020-07-19
加密流程
https://blog.csdn.net/qq_28205153/article/details/55798628
程式碼
############################輔助函式############################### # 十進位制轉成二進位制 def INT_BIN(NUM): i = bin(NUM)[2:] if len(i) != 8: i = ((8 - len(i)) * '0') + i return i # 異或運算 def XOR(a,b): c="" for i,j in zip(a,b): for a,b in zip(i,j): if a==b: c+='0' else: c+='1' d = [] for i in range(4): d.append(c[i * 8 : (i + 1) * 8]) return d def xOR(a,b): c="" for i,j in zip(a,b): if i==j: c += '0' else: c += '1' return c # 置換函式 def Replace(ARR,change): ARR1 = [] for j in change: ARR1.append(ARR[j]) return ARR1 ################################################################################## ############################################金鑰擴充套件############################### # S盒 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) # 逆S盒 NiSbox = (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 = (['00000001', '00000000', '00000000', '00000000'],['00000010', '00000000', '00000000', '00000000'], ['00000100', '00000000', '00000000', '00000000'], ['00001000', '00000000', '00000000', '00000000'], ['00010000', '00000000', '00000000', '00000000'], ['00100000', '00000000', '00000000', '00000000'], ['01000000', '00000000', '00000000', '00000000'], ['10000000', '00000000', '00000000', '00000000'], ['00011011', '00000000', '00000000', '00000000'], ['00110110', '00000000', '00000000', '00000000']) nicolumnmix = ('0x0e', '0x0b', '0x0d', '0x09', '0x09', '0x0e', '0x0b', '0x0d', '0x0d', '0x09', '0x0e', '0x0b', '0x0b', '0x0d', '0x09', '0x0e') columnmix = ('0x02','0x03','0x01','0x01', '0x01','0x02','0x03','0x01', '0x01','0x01','0x02','0x03', '0x03','0x01','0x01','0x02') change = (0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15) # T函式 def T(Wi, num): #左移一位 Wi.append(Wi[0]) del Wi[0] Wi1 = [] #s盒 for i in Wi: x = int(i[:4], 2) y = int(i[4:], 2) Wi1.append(INT_BIN(SBox[x*16 + y])) return XOR(Wi1, Rcon[num]) # 生成金鑰函式 def KeyExtension(Key): SubkeyList = [ [ 0 for i in range(4) ] for i in range(44)] KeyBin = '' for i in Key: KeyBin += INT_BIN(ord(i)) j = 0 # 生成W[0]-W[3] for i in range(int(len(KeyBin) / 8)): SubkeyList[j][i % 4] = KeyBin[i * 8:(i + 1) * 8] if (i + 1) % 4 == 0: j += 1 # 擴充套件 num = 0 for i in range(4,44): if i % 4 == 0: SubkeyList[i] = XOR(T(SubkeyList[i - 1].copy(), num), SubkeyList[i-4]) num += 1 else: SubkeyList[i] = XOR(SubkeyList[i - 4], SubkeyList[i - 1]) return SubkeyList ################################################################################ ####################################輪加密###################################### HANG = (0,5,10,15,4,9,14,3,8,13,2,7,12,1,6,11) NIHANG = (0,13,10,7,4,1,14,11,8,5,2,15,12,9,6,3) #S盒 def SBOX(Wi, Sbox1): Wi1 = [] for i in Wi: x = int(i[:4], 2) y = int(i[4:], 2) Wi1.append(INT_BIN(Sbox1[x*16 + y])) return Wi1 # 列混合時00000010 * NUM時的函式 def XOR2(NUM): if NUM[0] == '0': return NUM[1:] + '0' else: return xOR(NUM[1:]+'0','00011011') # 逆列混合 def NiColumnMix(a,b): a = int(a,16) if a % 2 != 0: if a == 1: return str(int(b,2)) elif a == 3: return str(int(XOR2(b), 2) ^ int(b, 2)) else: return int(NiColumnMix(hex(a-1),b)) ^ int(b,2) else: if a == 2: return str(int(XOR2(b), 2)) elif a == 4: return str(int(XOR2(XOR2(b)), 2)) else: return NiColumnMix(hex(a // 2), XOR2(b)) # 子金鑰異或 def KeyXorText(PlainText, Key): PlainTextTmp = [] k = 0 for i in Key: for j in i: PlainTextTmp.append(xOR(j,PlainText[k])) k += 1 return PlainTextTmp # 字串轉二進位制 def STR_BIN(NUMS): A = '' for NUM in NUMS: NUM = ord(NUM) i = bin(NUM)[2:] if len(i) != 8: i = ((8 - len(i)) * '0') + i A += i B = [] for i in range(len(NUMS)): B.append(A[i * 8 : (i + 1) * 8]) return B # 填充字元 def fillChar(PlainText): TMP = [] TMP1 = [] if len(PlainText) % 16 == 0: for i in range(len(PlainText) // 16): TMP.append(STR_BIN(PlainText[i * 16 : (i + 1) * 16])) TMP.append(['00010000' for i in range(16)]) else: for i in range(len(PlainText) // 16): TMP.append(STR_BIN(PlainText[i * 16 : (i + 1) * 16])) TMP1.append(STR_BIN(PlainText[(len(PlainText) // 16) * 16 :])) a = bin(16 - len(PlainText) % 16)[2:] if len(a) < 8: a = '0' * int(8 - len(a) % 8) + a TMP1 = TMP1[0] + [a for i in range(16 - len(PlainText) % 16)] TMP.append(TMP1) return TMP # 加密 def Encrypt(PlainText,Key): # 字串轉2進位制 PlainTexts = fillChar(PlainText) print('明文加密：',PlainTexts) # 生成子金鑰 Keys = KeyExtension(Key) Ciphertext = [] # 10輪迭代 # 輪金鑰異或 for PlainText in PlainTexts: PlainText = KeyXorText(PlainText, Keys[: 4]) for i in range(10): # 位元組代替 PlainText = SBOX(PlainText, SBox) # 行位移 PlainText = Replace(PlainText, HANG) # 列混合 if i != 9: c = [] for k in range(4): for j in range(4): a1=int(NiColumnMix(columnmix[4*k],PlainText[4*j])) a2=int(NiColumnMix(columnmix[4*k+1],PlainText[4*j+1])) a3=int(NiColumnMix(columnmix[4*k+2],PlainText[4*j+2])) a4=int(NiColumnMix(columnmix[4*k+3],PlainText[4*j+3])) c.append(INT_BIN(a1^a2^a3^a4)) PlainText = Replace(c,change) # 輪金鑰異或 PlainText = KeyXorText(PlainText, Keys[(i + 1) * 4 : (i + 2)*4]) Ciphertext.append(PlainText) return Ciphertext # 解密 def Decrypt(Ciphertexts, Key): # 生成子金鑰 Keys = KeyExtension(Key) # 10輪迭代 # 輪金鑰異或 PlainTexts = [] for Ciphertext in Ciphertexts: Ciphertext = KeyXorText(Ciphertext, Keys[40:]) for i in range(10): # 逆行位移 Ciphertext = Replace(Ciphertext, NIHANG) # 逆位元組替換 Ciphertext = SBOX(Ciphertext, NiSbox) # 輪金鑰異或 Ciphertext = KeyXorText(Ciphertext, Keys[40 - (i + 1) * 4 : 40 - i * 4]) # 逆列混合 if i != 9: c = [] for k in range(4): for j in range(4): a1=int(NiColumnMix(nicolumnmix[4*k],Ciphertext[4*j])) a2=int(NiColumnMix(nicolumnmix[4*k+1],Ciphertext[4*j+1])) a3=int(NiColumnMix(nicolumnmix[4*k+2],Ciphertext[4*j+2])) a4=int(NiColumnMix(nicolumnmix[4*k+3],Ciphertext[4*j+3])) c.append(INT_BIN(a1^a2^a3^a4)) Ciphertext = Replace(c,change) PlainTexts.append(Ciphertext) return PlainTexts if __name__ == "__main__": a = '12wqedsdcretgvf11' b = '1234567890123456' c = Encrypt(a,b) d = Decrypt(c,b) print('密文：',c) print('明文：',d)