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File: msg-crypt/index.php

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  Classes of Dave Smith  >  Image Key Cypher  >  msg-crypt/index.php  >  Download  
File: msg-crypt/index.php
Role: Example script
Content type: text/plain
Description: Sample for remote images
Class: Image Key Cypher
Encrypt and decrypt text using images for the key
Author: By
Last change:
Date: 8 months ago
Size: 3,576 bytes
 

Contents

Class file image Download
<?php
//Sample code for operational remote key generation

//Settings
//use curl to get remote image
$usecurl = true;

//have curl verify ssl peer
//to verify, certificates must be properly set up for curl
$verify = false;

$errortext = '';
if( isset(
$_REQUEST['submitted']) ){
   
//the form has been submitted so include and instantiate class
   
require_once('../imagekey.class.php');
   
$ikey = new imageKey();

   
//read request into variables
   
$src = $_REQUEST['img_src'];
   
$msg = $_REQUEST['msg_text'];

   
//check for errors
   
if( empty($src) ){
       
$errortext .= 'You must enter a URL to the source image<br>';
    }
    if( empty(
$msg) ){
       
$errortext .= 'You must enter a message<br>';
    }

    if( empty(
$errortext) ){
       
//no errors found so process image
       
$ikey->imgPath = ''; //<-- since we are supplying the full URL, we need to remove any default paths
       
$ikey->createKey($src,'',$usecurl,$verify);

        if( !empty(
$ikey->errorText) ){
           
//problem creating key
           
$errortext .= $ikey->errorText;
        }

       
//determine if we are processing an encrypted message or not and launch appropriate method
       
$pattern = "/{$ikey->msgDelim}[0-9]+{$ikey->msgDelim}/";
       
$msgtext = ( preg_match($pattern,$msg) ) ? trim($ikey->decryptMsg($msg)) : trim($ikey->encryptMsg($msg));

        if( empty(
$msgtext) ){
           
//class did not return a message
           
$errortext .= 'There was a problem processing your request';
        }
    }
}else{
   
//declare and set default values used in the form
   
$src = '';
   
$msg = '';
   
$msgtext = '';
}
?>
<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Image Key Encryption</title>
    </head>
    <style>
        .form-label, .form-submit, .msg-result, .msg-return{
            margin-top: 20px;
        }
        input[type="text"]{
            width: 600px;
        }
        textarea{
            width: 600px;
            height: 150px;
        }
        a{
            color: blue;
            text-decoration: none;
        }
        a:hover{
            color: red;
        }
        .error-text{
            border: thin solid red;
            padding: 20px;
        }
        .msg-result{
            border: thin solid black;
            padding: 20px;
        }
    </style>
    <body>
<?php
if( !empty($errortext) ){
   
//error text exists so display it
?>
<div class="error-text"><?php echo $errortext;?></div>
<?php
}
if( empty(
$msgtext) ){
   
//no message text so show the form
?>
<form method="POST">
            <div class="form-label"><label for="img_src">Enter full URL to the image</label></div>
            <div class="form-input"><input type="text" name="img_src" id="img_src" value="<?php echo $src;?>" autocomplete="off"></div>
            <div class="form-label"><label for="msg_text">Enter message</label></div>
            <div class="form-input"><textarea name="msg_text" id="msg_text"><?php echo $msg;?></textarea></div>
            <div class="form-submit">
                <input type="hidden" name="submitted" value="1">
                <input type="submit" name="form_submit" value="Go">
            </div>
        </form>
<?php
}else{
   
//we have message text so display it
?>
<div class="msg-result"><?php echo $msgtext;?></div>
        <div class="msg-return"><a href="">Return</a></div>
<?php
}
?>
</body>
</html>