EVOLUTION-NINJA

Edit File: encdec_paytm.php

<?php

function encrypt_e($input, $ky) {
	$key = $ky;
	$size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, 'cbc');
	$input = pkcs5_pad_e($input, $size);
	$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', 'cbc', '');
	$iv = "@@@@&&&&####$$$$";
	mcrypt_generic_init($td, $key, $iv);
	$data = mcrypt_generic($td, $input);
	mcrypt_generic_deinit($td);
	mcrypt_module_close($td);
	$data = base64_encode($data);
	return $data;
}

function decrypt_e($crypt, $ky) {

$crypt = base64_decode($crypt);
	$key = $ky;
	$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', 'cbc', '');
	$iv = "@@@@&&&&####$$$$";
	mcrypt_generic_init($td, $key, $iv);
	$decrypted_data = mdecrypt_generic($td, $crypt);
	mcrypt_generic_deinit($td);
	mcrypt_module_close($td);
	$decrypted_data = pkcs5_unpad_e($decrypted_data);
	$decrypted_data = rtrim($decrypted_data);
	return $decrypted_data;
}

function pkcs5_pad_e($text, $blocksize) {
	$pad = $blocksize - (strlen($text) % $blocksize);
	return $text . str_repeat(chr($pad), $pad);
}

function pkcs5_unpad_e($text) {
	$pad = ord($text{strlen($text) - 1});
	if ($pad > strlen($text))
		return false;
	return substr($text, 0, -1 * $pad);
}

function generateSalt_e($length) {
	$random = "";
	srand((double) microtime() * 1000000);

$data = "AbcDE123IJKLMN67QRSTUVWXYZ";
	$data .= "aBCdefghijklmn123opq45rs67tuv89wxyz";
	$data .= "0FGH45OP89";

for ($i = 0; $i < $length; $i++) {
		$random .= substr($data, (rand() % (strlen($data))), 1);
	}

return $random;
}

function checkString_e($value) {
	if ($value == 'null')
		$value = '';
	return $value;
}

function verifychecksum_e($arrayList, $key, $checksumvalue) {
	$arrayList = removeCheckSumParam($arrayList);
	ksort($arrayList);
	$str = getArray2StrForVerify($arrayList);
	$paytm_hash = decrypt_e($checksumvalue, $key);
	$salt = substr($paytm_hash, -4);

$finalString = $str . "|" . $salt;

$website_hash = hash("sha256", $finalString);
	$website_hash .= $salt;

$validFlag = "FALSE";
	if ($website_hash == $paytm_hash) {
		$validFlag = "TRUE";
	} else {
		$validFlag = "FALSE";
	}
	return $validFlag;
}

function verifychecksum_eFromStr($str, $key, $checksumvalue) {
	$paytm_hash = decrypt_e($checksumvalue, $key);
	$salt = substr($paytm_hash, -4);

$finalString = $str . "|" . $salt;

$website_hash = hash("sha256", $finalString);
	$website_hash .= $salt;

$validFlag = "FALSE";
	if ($website_hash == $paytm_hash) {
		$validFlag = "TRUE";
	} else {
		$validFlag = "FALSE";
	}
	return $validFlag;
}

function redirect2PG($paramList, $key) {
	$hashString = getchecksumFromArray($paramList);
	$checksum = encrypt_e($hashString, $key);
}

function removeCheckSumParam($arrayList) {
	if (isset($arrayList["CHECKSUMHASH"])) {
		unset($arrayList["CHECKSUMHASH"]);
	}
	return $arrayList;
}

function getTxnStatus($requestParamList) {
	return callAPI(PAYTM_STATUS_QUERY_URL, $requestParamList);
}

function getTxnStatusNew($requestParamList) {
	return callNewAPI(PAYTM_STATUS_QUERY_NEW_URL, $requestParamList);
}

function initiateTxnRefund($requestParamList) {
	$CHECKSUM = getRefundChecksumFromArray($requestParamList,PAYTM_MERCHANT_KEY,0);
	$requestParamList["CHECKSUM"] = $CHECKSUM;
	return callAPI(PAYTM_REFUND_URL, $requestParamList);
}

function callAPI($apiURL, $requestParamList) {
	$jsonResponse = "";
	$responseParamList = array();
	$JsonData =json_encode($requestParamList);
	$postData = 'JsonData='.urlencode($JsonData);
	$ch = curl_init($apiURL);
	curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");                                                                     
	curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);                                                                  
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
	curl_setopt ($ch, CURLOPT_SSL_VERIFYHOST, 0);
	curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, 0);
	curl_setopt($ch, CURLOPT_HTTPHEADER, array(                                                                         
	'Content-Type: application/json', 
	'Content-Length: ' . strlen($postData))                                                                       
	);  
	$jsonResponse = curl_exec($ch);   
	$responseParamList = json_decode($jsonResponse,true);
	return $responseParamList;
}