Android移动端与PHP服务端对称加密解密的实现-！

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class ApiCrypter{ 

    private $iv  = 'fdsfds85435nfdfs'; #与JAVA实现类中的设置必须一致

    private $key = '89432hjfsd891787'; #与JAVA实现类中的设置必须一致


    public function __construct() {

    }


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public function encrypt($str) { 

  $str = $this->pkcs5_pad($str);   

  $iv = $this->iv; 

  $td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv); 

  mcrypt_generic_init($td, $this->key, $iv);

  $encrypted = mcrypt_generic($td, $str); 

  mcrypt_generic_deinit($td);

  mcrypt_module_close($td); 

  return bin2hex($encrypted);

}

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public function decrypt($code) { 

  $code = $this->hex2bin($code);

  $iv = $this->iv; 

  $td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv); 

  mcrypt_generic_init($td, $this->key, $iv);

  $decrypted = mdecrypt_generic($td, $code); 

  mcrypt_generic_deinit($td);

  mcrypt_module_close($td); 

  $ut =  utf8_encode(trim($decrypted));

  return $this->pkcs5_unpad($ut);

}

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protected function hex2bin($hexdata) {

  $bindata = ''; 

  for ($i = 0; $i < strlen($hexdata); $i += 2) {

      $bindata .= chr(hexdec(substr($hexdata, $i, 2)));

  } 

  return $bindata;

} 


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protected function pkcs5_pad ($text) {

  $blocksize = 16;

  $pad = $blocksize - (strlen($text) % $blocksize);

  return $text . str_repeat(chr($pad), $pad);

}


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    protected function pkcs5_unpad($text) {

      $pad = ord($text{strlen($text)-1});

      if ($pad > strlen($text)) {

          return false;    

      }

      if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) {

          return false;

      }

      return substr($text, 0, -1 * $pad);

    }

}
 

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package com.cwilldev.crypt;


import java.security.NoSuchAlgorithmException;

import javax.crypto.Cipher;

import javax.crypto.NoSuchPaddingException;

import javax.crypto.spec.IvParameterSpec;

import javax.crypto.spec.SecretKeySpec;


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public class ApiCrypter {


    private String iv              = "fdsfds85435nfdfs"; //根据实际需要更改

    private String secretkey       = "89432hjfsd891787"; //根据实际需要更改

    private IvParameterSpec ivspec;

    private SecretKeySpec keyspec;

    private Cipher cipher;


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public ApiCrypter()

{

    ivspec = new IvParameterSpec(iv.getBytes());

    keyspec = new SecretKeySpec(secretkey.getBytes(), "AES");


    try {

        cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

    } catch (NoSuchAlgorithmException e) {

        e.printStackTrace();

    } catch (NoSuchPaddingException e) {

        e.printStackTrace();

    }

}


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public byte[] encrypt(String text) throws Exception

{

    if(text == null || text.length() == 0) {

        throw new Exception("Empty string");

    }

    byte[] encrypted = null;

    try {

        cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);

        encrypted = cipher.doFinal(text.getBytes("UTF-8"));

    }

    catch (Exception e) {

        throw new Exception("[encrypt] " + e.getMessage());

    }

    return encrypted;

}

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public byte[] decrypt(String code) throws Exception

{

    if(code == null || code.length() == 0) {

        throw new Exception("Empty string");

    }

    byte[] decrypted = null;

    try {

        cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);

        decrypted = cipher.doFinal(hexToBytes(code));

    }

    catch (Exception e) {

        throw new Exception("[decrypt] " + e.getMessage());

    }

    return decrypted;

}


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public static String bytesToHex(byte[] data)

{

    if (data==null) {

        return null;

    }

    int len = data.length;

    String str = "";

    for (int i=0; i<len; i++) {

        if ((data[i]&0xFF)<16) {

            str = str + "0" + java.lang.Integer.toHexString(data[i]&0xFF);

        }

        else {

            str = str + java.lang.Integer.toHexString(data[i]&0xFF);

        }

    }

    return str;

}


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    public static byte[] hexToBytes(String str) {

        if (str==null) {

            return null;

        }

        else if (str.length() < 2) {

            return null;

        }

        else {

            int len = str.length() / 2;

            byte[] buffer = new byte[len];

            for (int i=0; i<len; i++) {

                buffer[i] = (byte) Integer.parseInt(str.substring(i*2,i*2+2),16);

            }

            return buffer;

        }

    }


}




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$original_text = 'test';

$mdes = new ApiCrypterUtil();

//加密

$encrypt_text = $mdes->encrypt($original_text);

$this->log($encrypt_text, LOG_DEBUG);

//解密

$this->log($mdes->decrypt($encrypt_text), LOG_DEBUG);

 

//加密:

ApiCrypter apiCrypter = new ApiCrypter();

String originalText = "test";

String encryptedText = ApiCrypter.bytesToHex(apiCrypter.encrypt(jsonParams.toString()));

//解密:

String res = new String(apiCrypter.decrypt(encryptedText), "UTF-8"); 

String decryptedText = URLDecoder.decode(res, "UTF-8");

本文链接： https://dragonersli.github.io/2016/07/02/Android移动端与PHP服务端对称加密解密的实现-！/
本人声明： 此文只作为自己日后工作学习中遇到类似问题方便快速回忆解决问题的笔记，仅供参考！
版权声明： 知识共享许可协议 本文首发于 すせなの筆記 转载无需联系本人，但要注明来源本站！
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