基于python+django的信息加密解密网站的实现.zip

# DES算法加密，对称加密 # IP置换表 IP_table = [58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4, 62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8, 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3, 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7 ] # 逆IP置换表 _IP_table = [40, 8, 48, 16, 56, 24, 64, 32, 39, 7, 47, 15, 55, 23, 63, 31, 38, 6, 46, 14, 54, 22, 62, 30, 37, 5, 45, 13, 53, 21, 61, 29, 36, 4, 44, 12, 52, 20, 60, 28, 35, 3, 43, 11, 51, 19, 59, 27, 34, 2, 42, 10, 50, 18, 58, 26, 33, 1, 41, 9, 49, 17, 57, 25 ] # S盒中的S1盒 S1 = [14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7, 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8, 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0, 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13 ] # S盒中的S2盒 S2 = [15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10, 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5, 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15, 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9 ] # S盒中的S3盒 S3 = [10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8, 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1, 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7, 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12 ] # S盒中的S4盒 S4 = [7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15, 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9, 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4, 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14 ] # S盒中的S5盒 S5 = [2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9, 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6, 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14, 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3 ] # S盒中的S6盒 S6 = [12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11, 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8, 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6, 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13 ] # S盒中的S7盒 S7 = [4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1, 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6, 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2, 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12 ] # S盒中的S8盒 S8 = [13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7, 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2, 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8, 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11 ] # S盒 S = [S1, S2, S3, S4, S5, S6, S7, S8] # P盒 P_table = [16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10, 2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25 ] # 压缩置换表1，不考虑每字节的第8位，将64位密钥减至56位。然后进行一次密钥置换。 yasuo1_table = [57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36, 63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4 ] # 压缩置换表2，用于将循环左移和右移后的56bit密钥压缩为48bit yasuo2_table = [14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10, 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2, 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48, 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32 ] # 用于对数据进行扩展置换，将32bit数据扩展为48bit extend_table = [32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9, 8, 9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17, 16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25, 24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1 ] # 将字符转换为对应的Unicode码，中文用2个字节表示 def char2unicode_ascii(intext, length): outtext = [] for i in range(length): outtext.append(ord(intext[i])) return outtext # 将Unicode码转为bit def unicode2bit(intext, length): outbit = [] for i in range(length * 16): outbit.append((intext[int(i / 16)] >> (i % 16)) & 1) # 一次左移一bit return outbit # 将8位ASCII码转为bit def byte2bit(inchar, length): outbit = [] for i in range(length * 8): outbit.append((inchar[int(i / 8)] >> (i % 8)) & 1) # 一次左移一bit return outbit # 将bit转为Unicode码 def bit2unicode(inbit, length): out = [] temp = 0 for i in range(length): temp = temp | (inbit[i] << (i % 16)) if i % 16 == 15: out.append(temp) temp = 0 return out # 将bit转为ascii 码 def bit2byte(inbit, length): out = [] temp = 0 for i in range(length): temp = temp | (inbit[i] << (i % 8)) if i % 8 == 7: out.append(temp) temp = 0 return out # 将unicode码转为字符（中文或英文） def unicode2char(inbyte, length): out = "" for i in range(length): out = out + chr(inbyte[i]) return out # 生成每一轮的key def createKeys(inkeys): keyResult = [] asciikey = char2unicode_ascii(inkeys, len(inkeys)) keyinit = byte2bit(asciikey, len(asciikey)) # 初始化列表key0,key1 key0 = [0 for i in range(56)] key1 = [0 for i in range(48)] # 进行密码压缩置换1，将64位密码压缩为56位 for i in range(56): key0[i] = keyinit[yasuo1_table[i] - 1] # 进行16轮的密码生成 for i in range(16): # ---------确定左移的次数---------- if (i == 0 or i == 1 or i == 8 or i == 15): moveStep = 1 else: moveStep = 2 # ------------------------------ # --------分两部分，每28bit位一部分，进行循环左移------------ for j in range(moveStep): for k in range(8): temp = key0[k * 7] for m in range(7 * k, 7 * k + 6): key0[m] = key0[m + 1] key0[k * 7 + 6] = temp temp = key0[0] for k in range(27): key0[k] = key0[k + 1] key0[27] = temp temp = key0[28] for k in range(28, 55): key0[k] = key0[k + 1] key0[55] = temp for k in range(48): key1[k] = key0[yasuo2_table[k] - 1] keyResult.extend(key1) return keyResult def DES(text, key, optionType): keyResult = createKeys(key) finalTextOfBit = [0 for i in range(64)] finalTextOfUnicode = [0 for i in range(4)] if optionType == 0: # 选择的操作类型为加密 tempText = [0 for i in range(64)] # 用于临时盛放IP逆置换之前，将L部分和R部分合并成64位的结果 extendR = [0 for i in range(48)] # 用于盛放R部分的扩展结果 unicodeText = char2unicode_ascii(text, len(text)) # print(unicodeText) bitText = unicode2bit(unicodeText, len(unicodeText)) # print(bitText) initTrans = [0 for i in range(64)] #