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com.github.hdy.common.util.AESUtil Maven / Gradle / Ivy
package com.github.hdy.common.util;
import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
/**
* AES加密解密
*
* @author 贺大爷
* @date 2018/2/6
*/
public class AESUtil {
private static final String PASSWORD = "hdyshinidie";
private static final String PASSWORD_T = "hdyshinidie_t";
/**
* 加密
*
* @param content 需要加密的内容
*
* @return
*/
public static String encrypt(String content) {
String os = System.getProperties().getProperty("os.name");
if (os.toLowerCase().contains("window")) {
return windowsEncrypt(windowsEncrypt(content, null), PASSWORD_T);
} else {
return linuxEncrypt(linuxEncrypt(content, null), PASSWORD_T);
}
}
/**
* 加密 windows
*
* @param content 需要加密的内容
* @param keys 加密密码
*
* @return
*/
public static String windowsEncrypt(String content, String keys) {
if (Strings.isNull(keys)) {
keys = PASSWORD;
}
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128, new SecureRandom(keys.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 URLEncoder.encode(parseByte2HexStr(result), "utf-8"); // 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;
}
/**
* 加密 linux
*
* @param content 需要加密的内容
* @param keys 加密密码
*
* @return
*/
public static String linuxEncrypt(String content, String keys) {
if (Strings.isNull(keys)) {
keys = PASSWORD;
}
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
secureRandom.setSeed(keys.getBytes());
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 URLEncoder.encode(parseByte2HexStr(result), "utf-8"); // 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
*
* @return
*/
public static String decrypt(String content) {
String os = System.getProperties().getProperty("os.name");
if (os.toLowerCase().contains("window")) {
return windowsDecrypt(windowsDecrypt(content, PASSWORD_T), null);
} else {
return linuxDecrypt(linuxDecrypt(content, PASSWORD_T), null);
}
}
/**
* 解密 window
*
* @param contents 待解密内容
* @param keys 解密密钥
*
* @return
*/
public static String windowsDecrypt(String contents, String keys) {
if (Strings.isNull(keys)) {
keys = PASSWORD;
}
byte[] content = parseHexStr2Byte(contents);
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128, new SecureRandom(keys.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 URLDecoder.decode(new String(result, "utf-8"), "utf-8");
} 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();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}
/**
* 解密 linux
*
* @param contents 待解密内容
* @param keys 解密密钥
*
* @return
*/
public static String linuxDecrypt(String contents, String keys) {
if (Strings.isNull(keys)) {
keys = PASSWORD;
}
byte[] content = parseHexStr2Byte(contents);
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
secureRandom.setSeed(keys.getBytes());
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 URLDecoder.decode(new String(result, "utf-8"), "utf-8");
} 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();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}
/**
* 将二进制转换成16进制
*
* @param buf
*
* @return
*/
private 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
*/
private 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;
}
}
