Data encryption transfer between Android and PHP

Data encryption transfer between Android and PHP [code] [Java] Code1 MCrypt =NewMCrypt ();2/*Encrypt*/3 String encrypted = Mcrypt.bytestohex (Mcrypt.encrypt ("Text to Encrypt") );4/*Decrypt*/5 String decrypted =NewString (Mcrypt.decrypt (encrypted)); Code [PHP] Code1 $mcrypt =NewMCrypt ();2#Encrypt3 $encrypted = $mcrypt->encrypt ("Text to Encrypt");4#Decrypt5 $decrypted = $mcryptdecrypt ($encrypted); Code Mcrypt.java001/***********/002/**java**/003 004Importjava.security.NoSuchAlgorithmException;005 006ImportJavax.crypto.Cipher;007Importjavax.crypto.NoSuchPaddingException;008ImportJavax.crypto.spec.IvParameterSpec;009ImportJavax.crypto.spec.SecretKeySpec;010 011 Public classMCrypt {012 013PrivateString IV = "FEDCBA9876543210";//Dummy IV (change it!)014PrivateIvparameterspec Ivspec;015PrivateSecretkeyspec Keyspec;016PrivateCipher Cipher;017 018PrivateString Secretkey = "0123456789abcdef";//Dummy Secretkey (change it!)019 020 PublicMCrypt ()021            {022 Ivspec =NewIvparameterspec (Iv.getbytes ());023 024 Keyspec =NewSecretkeyspec (Secretkey.getbytes (), "AES");025 026Try {027 cipher = cipher.getinstance ("aes/cbc/nopadding");028}Catch(nosuchalgorithmexception e) {029//TODO auto-generated Catch block030e.printstacktrace ();031}Catch(nosuchpaddingexception e) {032//TODO auto-generated Catch block033e.printstacktrace ();034                }035            }036 037 Public byte[] Encrypt (String text)throwsException038            {039if(Text = =NULL|| Text.length () = = 0)040Throw NewException ("Empty string");041 042byte[] encrypted =NULL;043 044Try {045Cipher.init (Cipher.encrypt_mode, Keyspec, ivspec);046 047 encrypted =cipher.dofinal (padstring (text). GetBytes ());048}Catch(Exception e)049                {          050Throw NewException ("[Encrypt]" +e.getmessage ());051                }052 053returnencrypted;054            }055 056 Public byte[] Decrypt (String code)throwsException057            {058if(Code = =NULL|| Code.length () = = 0)059Throw NewException ("Empty string");060 061byte[] decrypted =NULL;062 063Try {064Cipher.init (Cipher.decrypt_mode, Keyspec, ivspec);065 066 decrypted =cipher.dofinal (hextobytes (code));067}Catch(Exception e)068                {069Throw NewException ("[Decrypt]" +e.getmessage ());070                }071returndecrypted;072            }073 074 075 076 Public StaticString Bytestohex (byte[] data)077            {078if(data==NULL)079                {080return NULL;081                }082 083intLen =data.length;084 String str = "";085 for(inti=0; i<len; i++) {086if((DATA[I]&AMP;AMP;0XFF) &lt;16)087 str = str + "0" + java.lang.Integer.toHexString (data[i]&amp;0xff);088Else089 str = str + java.lang.Integer.toHexString (data[i]&amp;0xff);090                }091returnstr;092            }093 094 095 Public Static byte[] hextobytes (String str) {096if(str==NULL) {097return NULL;098}Else if(Str.length () &lt; 2) {099return NULL;100}Else {101intLen = Str.length ()/2;102byte[] buffer =New byte[Len];103 for(inti=0; i&lt;len; i++) {104 Buffer[i] = (byte) Integer.parseint (str.substring (i*2,i*2+2), 16);105                    }106returnbuffer;107                }108            }109 110 111 112Private Staticstring padstring (string source)113            {114CharPaddingchar = ' ';115intsize = 16;116intx = source.length ()%size;117intPadlength = Size-x;118 119 for(inti = 0; I &lt; Padlength; i++)120              {121 Source + =Paddingchar;122              }123 124returnSource;125            }126}[Code] mcrypt.php01/**********/02/**php**/&lt;?PHP05 06classMCrypt07    {08Private$iv = ' fedcba9876543210 '; #Same as in JAVA09Private$key = ' 0123456789abcdef '; #Same as in JAVA10 11 12function __construct ()13        {14        }15 16function Encrypt ($str) {17 18//$key = $this->hex2bin ($key); $iv = $ This-&Gt;iv;$TD = Mcrypt_module_open (' rijndael-128 ', ', ' CBC ', $IV);Mcrypt_generic_init ($TD, $ This-&Gt;key, $iv);$encrypted =mcrypt_generic ($TD, $str);25 26Mcrypt_generic_deinit ($TD);27Mcrypt_module_close ($TD);28 29returnBin2Hex ($encrypted);30        }31 32function Decrypt ($code) {33//$key = $this-&gt;hex2bin ($key);$code = $ This-&Gt;hex2bin ($code);$iv = $ This-&Gt;iv;PNS $td = Mcrypt_module_open (' rijndael-128 ', ', ' CBC ', $IV);Mcrypt_generic_init ($TD, $ This-&Gt;key, $iv);$decrypted =mdecrypt_generic ($TD, $code);41 42Mcrypt_generic_deinit ($TD);43Mcrypt_module_close ($TD);44 45returnUtf8_encode (Trim ($decrypted));46        }47 48protectedfunction Hex2bin ($hexdata) {$bindata = ";50 51 for($i = 0; $i &lt; strlen ($hexdata); $i + = 2) {$bindata. = Chr (Hexdec (substr ($hexdata, $i, 2)));53          }54 55return$bindata;56        }57 58    }59// Seehttp://androidsnippets.com/encrypt-decrypt-between-android-and-php