AesUtil.java
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package cn.fw.rp.common.util;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
/**
* Created with IntelliJ IDEA.
* Created By Devin
* Date: 2018/4/10
* Time: 17:14
* Description:
*/
public class AesUtil {
private final static String KEY = ")O[xfrs]6,YF}+efcaj{+oESb9d8>Zhy";
private final static String encoding = "UTF-8";
public static String aesDecrypt(String content) {
return decrypt(content, KEY);
}
public static String aesEncrypt(String content) {
return encryptAES(content, KEY);
}
/**
* AES加密
*
* @param content
* @param password
* @return
*/
public static String encryptAES(String content, String password) {
byte[] encryptResult = encrypt(content, password);
String encryptResultStr = parseByte2HexStr(encryptResult);
// BASE64位加密
encryptResultStr = ebotongEncrypto(encryptResultStr);
return encryptResultStr;
}
/**
* AES解密
*
* @param encryptResultStr
* @param password
* @return
*/
public static String decrypt(String encryptResultStr, String password) {
// BASE64位解密
String decrpt = ebotongDecrypto(encryptResultStr);
byte[] decryptFrom = parseHexStr2Byte(decrpt);
byte[] decryptResult = decrypt(decryptFrom, password);
return new String(decryptResult);
}
/**
* 加密字符串
*/
public static String ebotongEncrypto(String str) {
BASE64Encoder base64encoder = new BASE64Encoder();
String result = str;
if (str != null && str.length() > 0) {
try {
byte[] encodeByte = str.getBytes(encoding);
result = base64encoder.encode(encodeByte);
} catch (Exception e) {
e.printStackTrace();
}
}
//base64加密超过一定长度会自动换行 需要去除换行符
return result.replaceAll("\r\n", "").replaceAll("\r", "").replaceAll("\n", "");
}
/**
* 解密字符串
*/
public static String ebotongDecrypto(String str) {
BASE64Decoder base64decoder = new BASE64Decoder();
try {
byte[] encodeByte = base64decoder.decodeBuffer(str);
return new String(encodeByte);
} catch (IOException e) {
e.printStackTrace();
return str;
}
}
/**
* 加密
*
* @param content 需要加密的内容
* @param password 加密密码
* @return
*/
private static byte[] encrypt(String content, String password) {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
//防止linux下 随机生成key
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
secureRandom.setSeed(password.getBytes());
kgen.init(128, secureRandom);
//kgen.init(128, new SecureRandom(password.getBytes()));
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 (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
return null;
}
/**
* 解密
*
* @param content 待解密内容
* @param password 解密密钥
* @return
*/
private static byte[] decrypt(byte[] content, String password) {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
//防止linux下 随机生成key
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
secureRandom.setSeed(password.getBytes());
kgen.init(128, secureRandom);
//kgen.init(128, new SecureRandom(password.getBytes()));
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 (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException 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;
}
}