/**
* 使用3DES加密与解密,可对byte[],String类型进行加密与解密 密文可使用String,byte[]存储.
*
* @author leizhimin 2010-6-3 11:10:54
*/
public class ThreeDES {
private Key key; //密钥
/**
* 根据参数生成KEY
*
* @param strKey 密钥字符串
*/
public void getKey(String strKey) {
try {
KeyGenerator _generator = KeyGenerator.getInstance("DES");
_generator.init(new SecureRandom(strKey.getBytes()));
this.key = _generator.generateKey();
_generator = null;
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 加密String明文输入,String密文输出
*
* @param strMing String明文
* @return String密文
*/
public String getEncString(String strMing) {
byte[] byteMi = null;
byte[] byteMing = null;
String strMi = "";
BASE64Encoder base64en = new BASE64Encoder();
try {
byteMing = strMing.getBytes("UTF8");
byteMi = this.getEncCode(byteMing);
strMi = base64en.encode(byteMi);
} catch (Exception e) {
e.printStackTrace();
} finally {
base64en = null;
byteMing = null;
byteMi = null;
}
return strMi;
}
/**
* 解密 以String密文输入,String明文输出
*
* @param strMi String密文
* @return String明文
*/
public String getDesString(String strMi) {
BASE64Decoder base64De = new BASE64Decoder();
byte[] byteMing = null;
byte[] byteMi = null;
String strMing = "";
try {
byteMi = base64De.decodeBuffer(strMi);
byteMing = this.getDesCode(byteMi);
strMing = new String(byteMing, "UTF8");
} catch (Exception e) {
e.printStackTrace();
} finally {
base64De = null;
byteMing = null;
byteMi = null;
}
return strMing;
}
/**
* 加密以byte[]明文输入,byte[]密文输出
*
* @param byteS byte[]明文
* @return byte[]密文
*/
private byte[] getEncCode(byte[] byteS) {
byte[] byteFina = null;
Cipher cipher;
try {
cipher = Cipher.getInstance("DES");
cipher.init(Cipher.ENCRYPT_MODE, key);
byteFina = cipher.doFinal(byteS);
} catch (Exception e) {
e.printStackTrace();
} finally {
cipher = null;
}
return byteFina;
}
/**
* 解密以byte[]密文输入,以byte[]明文输出
*
* @param byteD byte[]密文
* @return byte[]明文
*/
private byte[] getDesCode(byte[] byteD) {
Cipher cipher;
byte[] byteFina = null;
try {
cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, key);
byteFina = cipher.doFinal(byteD);
} catch (Exception e) {
e.printStackTrace();
} finally {
cipher = null;
}
return byteFina;
}
public static void main(String[] args) {
ThreeDES des = new ThreeDES(); // 实例化一个对像
des.getKey("abcdefgasiainfo"); // 生成密匙
String strEnc = des.getEncString("abc");// 加密字符串,返回String的密文
System.out.println(strEnc);
String strDes = des.getDesString(strEnc);// 把String 类型的密文解密
System.out.println(strDes);
}
}
des3 base64加密代码
最新推荐文章于 2020-03-10 15:57:18 发布