PHP、Java对称加密中的AES加密方法

 

PHP AES加密

<?php
ini_set('default_charset','utf-8');
class AES{
    public $iv = null;
    public $key = null;
    public $bit = 128;
    private $cipher;
    public function __construct($bit, $key, $iv, $mode) {
        if(empty($bit) || empty($key) || empty($iv) || empty($mode))
            return NULL;
        $this->bit = $bit;
        $this->key = $key;
        $this->iv = $iv;
        $this->mode = $mode;
        switch($this->bit) {
            case 192:$this->cipher = MCRYPT_RIJNDAEL_192; break;
            case 256:$this->cipher = MCRYPT_RIJNDAEL_256; break;
            default: $this->cipher = MCRYPT_RIJNDAEL_128;
        }
        switch($this->mode) {
            case 'ecb':$this->mode = MCRYPT_MODE_ECB; break;
            case 'cfb':$this->mode = MCRYPT_MODE_CFB; break;
            case 'ofb':$this->mode = MCRYPT_MODE_OFB; break;
            case 'nofb':$this->mode = MCRYPT_MODE_NOFB; break;
            default: $this->mode = MCRYPT_MODE_CBC;
        }
    }
    public function encrypt($data) {
        $data = base64_encode(mcrypt_encrypt( $this->cipher, $this->key, $data, $this->mode, $this->iv));
        return $data;
    }
    public function decrypt($data) {
        $data = mcrypt_decrypt( $this->cipher, $this->key, base64_decode($data), $this->mode, $this->iv);
        $data = rtrim(rtrim($data), ".");
        return $data;
    }
}
//  使用方法
$aes = new AES($bit = 128, $key = 'abcdef1234567890', $iv = '0987654321fedcba', $mode = 'cbc');
echo $c =$aes->encrypt("中文")."</br>";
echo $aes->decrypt($c);

Java AES加密

package com.lj.test;

import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
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");  
                    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 
     */  
    public static byte[] decrypt(byte[] content, String password) {  
            try {  
                     KeyGenerator kgen = KeyGenerator.getInstance("AES");  
                     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;  
    }  
    
    public static void main(String[] args) {

        String str = "asd";
        
        byte[] encryptResult = AES.encrypt(str, "1111");
        String encrypt_cookie = AES.parseByte2HexStr(encryptResult); // 11,浜琋A9999
        System.out.println("加密后：" + encrypt_cookie);

        byte[] decryptFrom = AES.parseHexStr2Byte(encrypt_cookie); // "66CD76792D0DBCFE62F39D9E89D8E5F8"
        byte[] decrypt_cookie = AES.decrypt(decryptFrom, "1111");
        
        System.out.println("加密后：" + new String(decrypt_cookie));
        
    }
}