android&php 加密解密

from://http://blog.csdn.net/hecker385/article/details/6717647

 

android&php 加密解密

分類： Php Android 2011-08-25 11:15  556人閱讀  評論(2)  收藏  舉報

android 加密 php layout exception string

MyCryptActivity.java

 

package com.test.crypt;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class MyCryptActivity extends Activity {
    /** Called when the activity is first created. */
    private EditText plainTextbefore, plaintextafter, ciphertext;
    private Button button01;
    private MCrypt mcrypt;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        plainTextbefore = (EditText)findViewById(R.id.EditText01);
        ciphertext = (EditText)findViewById(R.id.EditText02);
        plaintextafter = (EditText)findViewById(R.id.EditText03);
        button01=(Button)findViewById(R.id.Button01);
        plainTextbefore.setHint("請輸入要加密的字符串");
        button01.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                String plainText = plainTextbefore.getText().toString();
                mcrypt = new MCrypt();
                try {
                    String encrypted = MCrypt.bytesToHex( mcrypt.encrypt(plainText));
                    String decrypted = new String( mcrypt.decrypt( encrypted ) );
                    ciphertext.setText(encrypted);
                    plaintextafter.setText(decrypted);
                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        });
    }
}

MCrypt.java

 

 

package com.test.crypt;

import java.security.NoSuchAlgorithmException;

import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class MCrypt {

    private String iv = "0123456789123456";//
    private IvParameterSpec ivspec;
    private SecretKeySpec keyspec;
    private Cipher cipher;

    private String SecretKey = "0123456789abcdef";//secretKey

    public MCrypt()
    {
            ivspec = new IvParameterSpec(iv.getBytes());//偏移量

            keyspec = new SecretKeySpec(SecretKey.getBytes(), "AES");//生成密鑰

            try {
                    cipher = Cipher.getInstance("AES/CBC/NoPadding");
            } catch (NoSuchAlgorithmException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
            } catch (NoSuchPaddingException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
            }
    }

    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(padString(text).getBytes());
            } catch (Exception e)
            {
                    throw new Exception("[encrypt] " + e.getMessage());
            }

            return encrypted;
    }

    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);//<span style="font-family: Simsun;font-size:16px; ">用密鑰和一組算法參數初始化此 Cipher。</span>

                    decrypted = cipher.doFinal(hexToBytes(code));
            } catch (Exception e)
            {
                    throw new Exception("[decrypt] " + e.getMessage());
            }
            return decrypted;
    }



    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;
    }


    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;
            }
    }



    private static String padString(String source)
    {
      char paddingChar = ' ';
      int size = 16;
      int x = source.length() % size;
      int padLength = size - x;

      for (int i = 0; i < padLength; i++)
      {
              source += paddingChar;
      }

      return source;
    }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

<TableLayout
android:id="@+id/TableLayout01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:collapseColumns="2"
android:stretchColumns="1">
    <TableRow
    android:id="@+id/TableRow01"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="明文："></TextView>
        <EditText
            android:id="@+id/EditText01"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"></EditText>
    </TableRow>

    <TableRow
    android:id="@+id/TableRow02"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="密文："></TextView>
        <EditText
            android:id="@+id/EditText02"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"></EditText>
    </TableRow>
    <TableRow
    android:id="@+id/TableRow03"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="明文："></TextView>
        <EditText
            android:id="@+id/EditText03"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"></EditText>
    </TableRow>
</TableLayout>

    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/Button01"
        android:text="顯示密文，並解密"></Button>
</LinearLayout>

 

php:

 

 

<?php

class MCrypt
{
        private $iv = 'fedcba9876543210'; #Same as in JAVA
        private $key = '0123456789abcdef'; #Same as in JAVA


        function __construct()
        {
        }

        function encrypt($str) {

          //$key = $this->hex2bin($key);
          $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);
        }

        function decrypt($code) {
          //$key = $this->hex2bin($key);
          $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);

          return utf8_encode(trim($decrypted));
        }

        protected function hex2bin($hexdata) {
          $bindata = '';

          for ($i = 0; $i < strlen($hexdata); $i += 2) {
                $bindata .= chr(hexdec(substr($hexdata, $i, 2)));
          }

          return $bindata;
        }

}