AES128CBC加密模式(工具类和源码)
public class AESHelper {
/*
* 加密用的Key 可以用26个字母和数字组成 使用AES-128-CBC加密模式，key需要为16位。
*/
private static final String key="hj7x89H$yuBI0456";
private static final String iv ="NIfb&95GUY86Gfgh";
public static String encryptAES(String data) throws Exception {
try {
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
int blockSize = cipher.getBlockSize();
byte[] dataBytes = data.getBytes();
int plaintextLength = dataBytes.length;
if (plaintextLength % blockSize != 0) {
plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
}
byte[] plaintext = new byte[plaintextLength];
System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);
SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes()); // CBC模式，需要一个向量iv，可增加加密算法的强度
cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
byte[] encrypted = cipher.doFinal(plaintext);
return AESHelper.encode(encrypted).trim(); // BASE64做转码。
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
public static String decryptAES(String data) throws Exception {
try
{
byte[] encrypted1 = AESHelper.decode(data);//先用base64解密
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original);
return originalString.trim();
}
catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* 编码
* @param byteArray
* @return
*/
public static String encode(byte[] byteArray) {
return new String(new Base64().encode(byteArray));
}
/**
* 解码
* @param base64EncodedString
* @return
*/
public static byte[] decode(String base64EncodedString) {
return new Base64().decode(base64EncodedString);
}
}