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)
