import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.security.SecureRandom;
/**
* AES加解密算法
*/
public class AesUtils {
//用于加密的密钥
private static final String PASSWORD_AES_KEY="123456789";
/**
* 将url传递的参数用AES方式加密
* @param url
* @return
*/
public static String aesEncryptUrl(String url){
try{
if(StringUtils.isEmpty(url)){
return null;
}
return parseByte2HexStr(encrypt(url,PASSWORD_AES_KEY));
}catch(Exception ex){
if(StringUtils.isEmpty(url)){
return null;
}
}
return null;
}
/**
* 将url传递的参数用AES方式解密
* @param url
* @return
*/
public static String aesDecrypt(String url){
try{
if(StringUtils.isEmpty(url)){
return null;
}
byte[] decryptFrom=parseHexStr2Byte(url);
System.out.println("decryptFrom"+decryptFrom.length);
byte[] deryptResult=decrypt(decryptFrom,PASSWORD_AES_KEY);
System.out.println(deryptResult);
return new String(deryptResult);
}catch(Exception ex){
}
return null;
}
/**
* 加密
*
* @param content 需要加密的内容
* @param password 加密密码
* @return
*/
public static byte[] encrypt(String content, String password) {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom secureRandom=SecureRandom.getInstance("SHA1PRNG");
secureRandom.setSeed(password.getBytes("UTF-8"));
kgen.init(128, secureRandom);
SecretKey secretKey = kgen.generateKey();
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance("AES");// 创建密码器
byte[] byteContent = content.getBytes("utf-8");
cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
byte[] result = cipher.doFinal(byteContent);
return result; // 加密
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**解密
* @param content 待解密内容
* @param password 解密密钥
* @return
*/
public static byte[] decrypt(byte[] content, String password) {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom secureRandom=SecureRandom.getInstance("SHA1PRNG");
secureRandom.setSeed(password.getBytes("UTF-8"));
kgen.init(128, secureRandom);
SecretKey secretKey = kgen.generateKey();
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance("AES");// 创建密码器
cipher.init(Cipher.DECRYPT_MODE, key);// 初始化
byte[] result = cipher.doFinal(content);
return result; // 加密
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**将二进制转换成16进制
* @param buf
* @return
*/
public static String parseByte2HexStr(byte buf[]) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < buf.length; i++) {
String hex = Integer.toHexString(buf[i] & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
sb.append(hex.toUpperCase());
}
return sb.toString();
}
/**将16进制转换为二进制
* @param hexStr
* @return
*/
public static byte[] parseHexStr2Byte(String hexStr) {
if (hexStr.length() < 1)
return null;
byte[] result = new byte[hexStr.length()/2];
for (int i = 0;i< hexStr.length()/2; i++) {
int high = Integer.parseInt(hexStr.substring(i*2, i*2+1), 16);
int low = Integer.parseInt(hexStr.substring(i*2+1, i*2+2), 16);
result[i] = (byte) (high * 16 + low);
}
return result;
}
}