加密和解密要用同一個key
AES:
import java.util.UUID;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
public class DES {
private static final byte[] iv = { 1, 2, 3, 4, 5, 6, 7, 8 };
/**
*
* @param encryptString 加密內容
* @param encryptKey 加密key
* @return
* @throws Exception
*/
public static String encryptDES(String encryptString, String encryptKey)
throws Exception {
IvParameterSpec zeroIv = new IvParameterSpec(iv);
SecretKeySpec key = new SecretKeySpec(encryptKey.getBytes(), "DES");
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);
String tmp = Base64.encodeBytes(encryptString.getBytes("UTF-8"));
byte[] encryptedData = cipher.doFinal(tmp.getBytes("UTF-8"));
return Base64.encodeBytes(encryptedData);
}
/**
*
* @param decryptString 解密內容
* @param encryptKey 解密key
* @return
* @throws Exception
*/
public static String decryptDES(String decryptString,String encryptKey)throws Exception {
IvParameterSpec zeroIv = new IvParameterSpec(iv);
SecretKeySpec key = new SecretKeySpec(encryptKey.getBytes(), "DES");
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);
byte[] decryptBytes = cipher.doFinal(Base64.decode(decryptString));
String tmp = new String(decryptBytes,"UTF-8");
return new String(Base64.decode(tmp));
}
public static String getKey(){
String p = UUID.randomUUID().toString();
return SHA1.Encrypt(p).substring(0, 8);
}
}
Test:
public static void testDES() throws Exception{
String content = "AES加密";
String key = DES.getKey();
String a = DES.encryptDES(content, key);
System.out.println("DES Encrypt..." + a);
String b = DES.decryptDES(a, key);
System.out.println("DES decrypt..." + b);
}
Console:DES Encrypt...93koM7boCXsNrH91Y0MDJA==
DES decrypt...AES加密