Android 和 PHP 之間進行資料加密傳輸

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Android 和 PHP 之間進行資料加密傳輸[代碼] [Java]代碼1    mcrypt = new MCrypt();2    /* Encrypt */3    String encrypted = MCrypt.bytesToHex( mcrypt.encrypt("Text to Encrypt") );4    /* Decrypt */5    String decrypted = new String( mcrypt.decrypt( encrypted ) );[代碼] [PHP]代碼1    $mcrypt = new MCrypt();2    #Encrypt3    $encrypted = $mcrypt->encrypt("Text to encrypt");4    #Decrypt5    $decrypted = $mcrypt->decrypt($encrypted);[代碼] MCrypt.java001    /***********/002    /**JAVA**/003     004        import java.security.NoSuchAlgorithmException;005     006        import javax.crypto.Cipher;007        import javax.crypto.NoSuchPaddingException;008        import javax.crypto.spec.IvParameterSpec;009        import javax.crypto.spec.SecretKeySpec;010     011        public class MCrypt {012     013            private String iv = "fedcba9876543210";//Dummy iv (CHANGE IT!)014            private IvParameterSpec ivspec;015            private SecretKeySpec keyspec;016            private Cipher cipher;017            018            private String SecretKey = "0123456789abcdef";//Dummy secretKey (CHANGE IT!)019            020            public MCrypt()021            {022                ivspec = new IvParameterSpec(iv.getBytes());023     024                keyspec = new SecretKeySpec(SecretKey.getBytes(), "AES");025                026                try {027                    cipher = Cipher.getInstance("AES/CBC/NoPadding");028                } catch (NoSuchAlgorithmException e) {029                    // TODO Auto-generated catch block030                    e.printStackTrace();031                } catch (NoSuchPaddingException e) {032                    // TODO Auto-generated catch block033                    e.printStackTrace();034                }035            }036            037            public byte[] encrypt(String text) throws Exception038            {039                if(text == null || text.length() == 0)040                    throw new Exception("Empty string");041                042                byte[] encrypted = null;043     044                try {045                    cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);046     047                    encrypted = cipher.doFinal(padString(text).getBytes());048                } catch (Exception e)049                {          050                    throw new Exception("[encrypt] " + e.getMessage());051                }052                053                return encrypted;054            }055            056            public byte[] decrypt(String code) throws Exception057            {058                if(code == null || code.length() == 0)059                    throw new Exception("Empty string");060                061                byte[] decrypted = null;062     063                try {064                    cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);065                    066                    decrypted = cipher.doFinal(hexToBytes(code));067                } catch (Exception e)068                {069                    throw new Exception("[decrypt] " + e.getMessage());070                }071                return decrypted;072            }073            074     075            076            public static String bytesToHex(byte[] data)077            {078                if (data==null)079                {080                    return null;081                }082                083                int len = data.length;084                String str = "";085                for (int i=0; i<len; i++) {086                    if ((data[i]&amp;0xFF)&lt;16)087                        str = str + "0" + java.lang.Integer.toHexString(data[i]&amp;0xFF);088                    else089                        str = str + java.lang.Integer.toHexString(data[i]&amp;0xFF);090                }091                return str;092            }093            094                095            public static byte[] hexToBytes(String str) {096                if (str==null) {097                    return null;098                } else if (str.length() &lt; 2) {099                    return null;100                } else {101                    int len = str.length() / 2;102                    byte[] buffer = new byte[len];103                    for (int i=0; i&lt;len; i++) {104                        buffer[i] = (byte) Integer.parseInt(str.substring(i*2,i*2+2),16);105                    }106                    return buffer;107                }108            }109            110            111     112            private static String padString(String source)113            {114              char paddingChar = ‘ ‘;115              int size = 16;116              int x = source.length() % size;117              int padLength = size - x;118     119              for (int i = 0; i &lt; padLength; i++)120              {121                  source += paddingChar;122              }123     124              return source;125            }126        }[代碼] mcrypt.php 01    /**********/02    /**PHP**/03     04    &lt;?php05     06    class MCrypt07    {08        private $iv = ‘fedcba9876543210‘; #Same as in JAVA09        private $key = ‘0123456789abcdef‘; #Same as in JAVA10     11     12        function __construct()13        {14        }15     16        function encrypt($str) {17     18          //$key = $this->hex2bin($key);   19          $iv = $this-&gt;iv;20     21          $td = mcrypt_module_open(‘rijndael-128‘, ‘‘, ‘cbc‘, $iv);22     23          mcrypt_generic_init($td, $this-&gt;key, $iv);24          $encrypted = mcrypt_generic($td, $str);25     26          mcrypt_generic_deinit($td);27          mcrypt_module_close($td);28     29          return bin2hex($encrypted);30        }31     32        function decrypt($code) {33          //$key = $this-&gt;hex2bin($key);34          $code = $this-&gt;hex2bin($code);35          $iv = $this-&gt;iv;36     37          $td = mcrypt_module_open(‘rijndael-128‘, ‘‘, ‘cbc‘, $iv);38     39          mcrypt_generic_init($td, $this-&gt;key, $iv);40          $decrypted = mdecrypt_generic($td, $code);41     42          mcrypt_generic_deinit($td);43          mcrypt_module_close($td);44     45          return utf8_encode(trim($decrypted));46        }47     48        protected function hex2bin($hexdata) {49          $bindata = ‘‘;50     51          for ($i = 0; $i &lt; strlen($hexdata); $i += 2) {52            $bindata .= chr(hexdec(substr($hexdata, $i, 2)));53          }54     55          return $bindata;56        }57     58    }59    // see http://androidsnippets.com/encrypt-decrypt-between-android-and-php