How to decrypting the php encrypted string using android?

Question

Hi I want to decrypting my php encrypted string. My code is

UsingPHP.java

import java.io.UnsupportedEncodingException;
import java.u         


        

Answer 1

Well there are two things:

1. Your encode5t function returns invalid base64 data. If I call encode5t("malavika") then the string ==AUVVVeZhlQhdlRspnUsRW is returned which is not valid base64. The = sign is the padding and is only allowed at the end of the base64-string. I guess what you wanted is:

   function encode5t($value1)
   {
       for($i=0;$i<3;$i++)
       {
           $value1=base64_encode(strrev($value1));
       }
   
       return $value1;
   }
   

   That means you just have to first call strrev and then base64_encode. And in the decode-function you first call base64_decode and then strrev (or the Java counter-parts).

2. As I've said in the comment, the second Parameter to Base64.decode in your Java-code is expects flags for the base64-processing and not the length of the string. This might for example turn on the URL_SAFE flag which makes it incompatible with the output of PHP's base64_encode.

Answer 2

Hi just change like this.

UsingPHP.java

try 
{
   System.out.println("Encrypted values going to decrypt......");
   byteArray1 = Base64.decode(encrypted_value, Base64.DEFAULT);
   System.out.println(byteArray1);
   String decrypt = new String(byteArray1, "UTF-8");                                   
   System.out.println("Values decrypted-->"+decrypt);
   decrypt_txt2.setText(decrypt);
}

encrypt.php

  <?php
  require_once("connection.php");
  $value='dcplsoft';
  function encode5t($value1)
  {
  $value1=base64_encode($value1);  // here you will get encrypted value
return $value1;
  }
$myvalue=encode5t($value);
    $mydata=mysql_query("SELECT * FROM crypt"); 
    while($row = mysql_fetch_assoc( $mydata )) 
    $sam=$row['value'];
    if($sam!='dcplsoft')
    $myinsert=mysql_query("insert into crypt values('".$value."','".$myvalue."')") or die (mysql_error());
    $data = mysql_query("SELECT * FROM crypt"); 
 while($row = mysql_fetch_assoc( $data )) 
$output[]=$row;
 print(json_encode($output));
    ?>