【源码】【通用】EC官方DES加解密java源码
对应的js暴露函数是：encodeDecoder.desEncrypt DES加密
encodeDecoder.desDecrypt DES解密
encodeDecoder.des3Encrypt 3DES加密
encodeDecoder.des3Decrypt 3DES解密
源码:
import android.util.Base64;
import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.SecureRandom;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
public class DesUtil {
private final static String DES = "DES";
/**
* Description 根据键值进行加密
*
* @param data
* @param key加密键byte数组
* @return
* @throws Exception
*/
public static String desCrypt(String data, String key) throws Exception {
byte[] bt = encrypt(data.getBytes(), key.getBytes());
return android.util.Base64.encodeToString(bt, 0);
}
/**
* Description 根据键值进行解密
*
* @param data
* @param key加密键byte数组
* @return
* @throws IOException
* @throws Exception
*/
public static String desDecrypt(String data, String key) throws Exception {
if (data == null)
return null;
byte[] buf = android.util.Base64.decode(data, Base64.DEFAULT);
byte[] bt = decrypt(buf, key.getBytes());
return new String(bt);
}
/**
* Description 根据键值进行加密
*
* @param key 加密键byte数组
* @return
* @throws Exception
*/
private static byte[] encrypt(byte[] data, byte[] key) throws Exception {
// 生成一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 从原始密钥数据创建DESKeySpec对象
DESKeySpec dks = new DESKeySpec(key);
// 创建一个密钥工厂，然后用它把DESKeySpec转换成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);
// 用密钥初始化Cipher对象
cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
return cipher.doFinal(data);
}
/**
* Description 根据键值进行解密
*
* @param data
* @param key加密键byte数组
* @return
* @throws Exception
*/
private static byte[] decrypt(byte[] data, byte[] key) throws Exception {
// 生成一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 从原始密钥数据创建DESKeySpec对象
DESKeySpec dks = new DESKeySpec(key);
// 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
// Cipher对象实际完成解密操作
Cipher cipher = Cipher.getInstance(DES);
// 用密钥初始化Cipher对象
cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
return cipher.doFinal(data);
}
public static String des3Crypto(String src, String password) throws Exception {
DESedeKeySpec deskey = new DESedeKeySpec(password.getBytes());
SecretKeyFactory skf = SecretKeyFactory.getInstance("DESede");
Key key = skf.generateSecret(deskey);
Cipher cipher1 = Cipher.getInstance("DESede/CBC/PKCS5Padding");
IvParameterSpec iv = new IvParameterSpec("12345678".getBytes());
cipher1.init(Cipher.ENCRYPT_MODE, key, iv);
byte[] bbb = cipher1.doFinal(src.getBytes());
if (bbb != null) {
bbb = android.util.Base64.encode(bbb, 0);
return new String(bbb);
}
return null;
}
public static String des3Decrypt(String src, String password) throws Exception {
byte[] d = (android.util.Base64.decode(src, 0));
if (d == null) {
return null;
}
DESedeKeySpec deskey = new DESedeKeySpec(password.getBytes());
SecretKeyFactory skf = SecretKeyFactory.getInstance("DESede");
Key key = skf.generateSecret(deskey);
Cipher cipher1 = Cipher.getInstance("DESede/CBC/PKCS5Padding");
IvParameterSpec iv = new IvParameterSpec("12345678".getBytes());
cipher1.init(Cipher.DECRYPT_MODE, key, iv);
byte[] bbb = cipher1.doFinal(d);
if (bbb == null) {
return null;
}
return new String(bbb);
}
}
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