How to decode TripleDESCryptoService string in php?

the following code decrypts a string in VB:

Public Function Desencriptar(ByVal Input As String) As String          Dim IV() As Byte = ASCIIEncoding.ASCII.GetBytes("abcdefgh")          Dim EncryptionKey() As Byte = Convert.FromBase64String("hereGoesTheKey")          Dim buffer() As Byte = Convert.FromBase64String(Input)         Dim des As TripleDESCryptoServiceProvider = New TripleDESCryptoServiceProvider         des.Key = EncryptionKey         des.IV = IV         Return Encoding.UTF8.GetString(des.CreateDecryptor().TransformFinalBlock(buffer, 0, buffer.Length()))      End Function 

I would like to know how to duplicate this process into a php script for a mobile app service. Thanks.

1 Answers

Answers 1

this code might help.  <?php     $key = "123456";     function pkcs7_pad($text, $blocksize)     {         $pad = $blocksize - (strlen($text) % $blocksize);         return $text . str_repeat(chr($pad), $pad);     }      $input = pkcs7_pad("test", 16);//16byte    // $key = md5(utf8_encode($key), true);     $td = mcrypt_module_open('tripledes', '', 'ecb', '');//ecb mode     $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);     mcrypt_generic_init($td, $key, $iv);     $encrypted_data = mcrypt_generic($td, $input);     mcrypt_generic_deinit($td);     mcrypt_module_close($td);      echo base64_encode($encrypted_data); ?> 

and please look on this link for more detail 3DES

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