CCAvanue in Laravel

This is the hardest thing as a developer I found, as there is no official documentation available to integrate the CCAvenue. Also, you will not find any tutorial or blog from which you can do the implementation. So, in this tutorial, we are going to cover how we can integrate the CCAvenue payment gateway with Laravel.

.env

Route::get('ccavanue', [Crudcontroller::class, 'ccavanue']);
Route::get('ccavanue-success', [Crudcontroller::class, 'ccResponse'])->name('cc_response');

Crudcontroller.php

function ccavanue(Request $request){

$input = $request->all();

$input['amount'] = 100;
$input['order_id'] = "123XSDDD456";
$input['currency'] = "INR";
$input['redirect_url'] = route('cc_response');
$input['cancel_url'] = route('cc_response');
$input['language'] = "EN";
$input['merchant_id'] = "3203901";

$merchant_data = "";

$working_key = '77D853122F3F002490A28C5E3BC9269F'; //Shared by CCAVENUES
$access_code = 'AVYW51LA49BV07WYVB'; //Shared by CCAVENUES

$input['merchant_param1'] = "some-custom-inputs"; // optional parameter
$input['merchant_param2'] = "some-custom-inputs"; // optional parameter
$input['merchant_param3'] = "some-custom-inputs"; // optional parameter
$input['merchant_param4'] = "some-custom-inputs"; // optional parameter
$input['merchant_param5'] = "some-custom-inputs"; // optional parameter
foreach ($input as $key => $value) {
$merchant_data .= $key . '=' . $value . '&';
}

// $encrypted_data = $this->encryptCC($merchant_data, $working_key);

// $key = $this->hextobin(md5($key));

$plainText = $merchant_data;

$hexString = md5($key);

$length = strlen(md5($key));
$binString = "";
$count = 0;
while ($count < $length) {
$subString = substr($hexString, $count, 2);
$packedString = pack("H*", $subString);
if ($count == 0) {
$binString = $packedString;
} else {
$binString .= $packedString;
}

$count += 2;
}
$key = $binString;
$initVector = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);
$openMode = openssl_encrypt($plainText, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $initVector);
$encryptedText = bin2hex($openMode);
$encrypted_data = $encryptedText;

$url = 'https://secure.ccavenue.com/transaction/transaction.do?command=initiateTransaction&encRequest=' . $encrypted_data . '&access_code=' . $access_code;
return redirect($url);
}

function ccResponse(Request $request)
{

$workingKey = config('cc-avenue.working_key'); //Working Key should be provided here.
$encResponse = $_POST["encResp"];

$rcvdString = $this->decryptCC($encResponse, $workingKey); //Crypto Decryption used as per the specified working key.
$order_status = "";
$decryptValues = explode('&', $rcvdString);
$dataSize = sizeof($decryptValues);





function encryptCC($plainText, $key)
{
$key = $this->hextobin(md5($key));
$initVector = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);
$openMode = openssl_encrypt($plainText, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $initVector);
$encryptedText = bin2hex($openMode);
return $encryptedText;
}

function decryptCC($encryptedText, $key)
{
$key = $this->hextobin(md5($key));
$initVector = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);
$encryptedText = $this->hextobin($encryptedText);
$decryptedText = openssl_decrypt($encryptedText, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $initVector);
return $decryptedText;
}




function pkcs5_padCC($plainText, $blockSize)
{
$pad = $blockSize - (strlen($plainText) % $blockSize);
return $plainText . str_repeat(chr($pad), $pad);
}

function hextobin($hexString)
{
$length = strlen($hexString);
$binString = "";
$count = 0;
while ($count < $length) {
$subString = substr($hexString, $count, 2);
$packedString = pack("H*", $subString);
if ($count == 0) {
$binString = $packedString;
} else {
$binString .= $packedString;
}

$count += 2;
}
return $binString;
}