DES加密解密

需要注意的是Java中的DESKeySpec类，其规定了秘钥的长度只能是8个字节，大于8字节则只取前8个字节。而且Java里DES加密采用的是默认模式：ECB模式，采用PKCS5Padding填充模式。故没有初始化向量（如果是其他模式，需要加上初始化向量）

Java DES加密解密，加密后再使用base64格式存储

public static String encrypt(String str) { String KEY = "12345678"; SecureRandom random = new SecureRandom(); DESKeySpec keySpec = new DESKeySpec(KEY.getBytes()); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES); SecretKey secretKey = keyFactory.generateSecret(keySpec); Cipher cipher = Cipher.getInstance(DES); cipher.init(Cipher.ENCRYPT_MODE, secretKey, random); byte[] cipherData = cipher.doFinal(str.getBytes()); return new BASE64Encoder().encode(cipherData); } public static String decrypt(String str) { String KEY = "12345678"; SecureRandom random = new SecureRandom(); DESKeySpec keySpec = new DESKeySpec(KEY.getBytes()); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES); SecretKey secretKey = keyFactory.generateSecret(keySpec); Cipher cipher = Cipher.getInstance(DES); cipher.init(Cipher.DECRYPT_MODE, secretKey, random); byte[] plainData = cipher.doFinal(new BASE64Decoder().decodeBuffer(str)); return new String(plainData); } 

Python DES 加密解密，加密模式和Java保持一致，ECB模式，填充模式为PAD_PKCS5

# -*- coding:UTF-8 -*- import base64 import sys from pyDes import des, PAD_PKCS5, ECB reload(sys) sys.setdefaultencoding('utf8') secret_key = '12345678' def des_encrypt(s): k = des(secret_key, ECB, secret_key, pad=None, padmode=PAD_PKCS5) en = k.encrypt(s, padmode=PAD_PKCS5) return base64.encodestring(en) def des_decrypt(s): k = des(secret_key, ECB, secret_key, pad=None, padmode=PAD_PKCS5) de = k.decrypt(data=base64.decodestring(s), padmode=PAD_PKCS5) return de if __name__ == '__main__': str_en = des_encrypt('xx') print(str_en) str_de = des_decrypt(str_en) print(str_de)