DES加密

最新推荐文章于 2024-07-24 17:30:38 发布

原创最新推荐文章于 2024-07-24 17:30:38 发布 · 330 阅读

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#加密 #解密

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本文提供了一个使用Java实现DES加密的具体示例代码。通过SecureRandom、DESKeySpec等类完成密钥生成，利用Cipher进行数据加密，并展示了两种输出加密结果的方式：Base64编码和十六进制字符串。

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public static String encrypt(String data, String key) throws Exception {
byte[] bt = encrypt(data.getBytes(), key.getBytes());
String strs = Base64.encodeBase64String(bt);
return strs;
}
private static byte[] encrypt(byte[] data, byte[] key) throws Exception {
SecureRandom sr = new SecureRandom();
DESKeySpec dks = new DESKeySpec(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey securekey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
return cipher.doFinal(data);

}

http://www.cnblogs.com/langtianya/p/3715975.html 实用

http://blog.youkuaiyun.com/cdh1213/article/details/6981978

http://blog.youkuaiyun.com/lincyang/article/details/6207902

public static String DESencrypt(String data, String pwd)
throws Exception {
return byte2hex(encrypt(data.getBytes(), pwd.getBytes()));
}

public static String byte2hex(byte[] b) {
String hs = "";
String stmp = "";
for (int n = 0; n < b.length; n++) {
stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
if (stmp.length() == 1)
hs = hs + "0" + stmp;
else
hs = hs + stmp;
}
return hs.toUpperCase();
}
private static byte[] encrypt(byte[] data, byte[] key) throws Exception {
// DES算法要求有一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 从原始密匙数据创建DESKeySpec对象
DESKeySpec dks = new DESKeySpec(key);
// 创建一个密匙工厂，然后用它把DESKeySpec转换成
// 一个SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey securekey = keyFactory.generateSecret(dks);
// Cipher对象实际完成加密操作
Cipher cipher = Cipher.getInstance("DES");
// 用密匙初始化Cipher对象
cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
// 现在，获取数据并加密
// 正式执行加密操作
return cipher.doFinal(data);
}