package com.panzhihua.common.utlis;
|
|
import java.io.UnsupportedEncodingException;
|
import java.nio.charset.StandardCharsets;
|
import java.security.InvalidKeyException;
|
import java.security.NoSuchAlgorithmException;
|
import java.security.SecureRandom;
|
|
import javax.crypto.*;
|
import javax.crypto.spec.SecretKeySpec;
|
|
public class AES {
|
/**
|
* 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());
|
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(StandardCharsets.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 (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
|
*/
|
public static byte[] decrypt(byte[] content, String password) {
|
try {
|
String charset = "utf-8";
|
KeyGenerator kgen = KeyGenerator.getInstance("AES");
|
|
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
|
secureRandom.setSeed(password.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 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;
|
}
|
|
/**
|
* 加密
|
*
|
* @param content
|
* 需要加密的内容
|
* @param password
|
* 加密密码
|
* @return
|
*/
|
public static byte[] encrypt2(String content, String password) {
|
try {
|
SecretKeySpec key = new SecretKeySpec(password.getBytes(), "AES");
|
Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
|
byte[] byteContent = content.getBytes(StandardCharsets.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 (IllegalBlockSizeException e) {
|
e.printStackTrace();
|
} catch (BadPaddingException e) {
|
e.printStackTrace();
|
}
|
return null;
|
}
|
|
public static void main(String[] args) throws UnsupportedEncodingException {
|
String content = "我是shoneworn";
|
String password = "12345678";
|
// 加密
|
System.out.println("加密前：" + content);
|
byte[] encode = encrypt(content, password);
|
|
// 传输过程,不转成16进制的字符串，就等着程序崩溃掉吧
|
String code = parseByte2HexStr(encode);
|
System.out.println("密文字符串：" + code);
|
byte[] decode = parseHexStr2Byte(code);
|
// 解密
|
byte[] decryptResult = decrypt(decode, password);
|
System.out.println("解密后：" + new String(decryptResult, StandardCharsets.UTF_8)); // 不转码会乱码
|
|
}
|
}
|
