android&php 加密解密

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("請輸入要加密的字串");        button01.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubString 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 blocke.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());//位移量            keyspec = new SecretKeySpec(SecretKey.getBytes(), "AES");//產生密鑰                        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);//用密鑰和一組演算法參數初始化此 Cipher。                                        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">    <TableLayoutandroid:id="@+id/TableLayout01"android:layout_width="fill_parent"android:layout_height="wrap_content"android:collapseColumns="2"android:stretchColumns="1"><TableRowandroid: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>   <TableRowandroid: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><TableRowandroid: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;                }        }