Viewing file:  encdec_paytm.php (4.18 KB) -rw-rw-r--
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<?php
function encrypt_e_openssl($input, $ky){
$iv = "@@@@&&&&####$$$$";
$data = openssl_encrypt ( $input , "AES-128-CBC" , $ky, 0, $iv );
return $data;
}
function decrypt_e_openssl($crypt, $ky){
$iv = "@@@@&&&&####$$$$";
$data = openssl_decrypt ( $crypt , "AES-128-CBC" , $ky, 0, $iv );
return $data;
}
function generateSalt_e($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) {
$myvalue = ltrim($value);
$myvalue = rtrim($myvalue);
if (in_array($myvalue, ['null', 'NULL'])) {
$myvalue = '';
}
return $myvalue;
}
function getChecksumFromArray($arrayList, $key, $sort=1) {
if ($sort != 0) {
ksort($arrayList);
}
$str = getArray2Str($arrayList);
$salt = generateSalt_e(4);
$finalString = $str . "|" . $salt;
$hash = hash("sha256", $finalString);
$hashString = $hash . $salt;
$checksum = encrypt_e_openssl($hashString, $key);
return $checksum;
}
function getChecksumFromString($str, $key) {
$salt = generateSalt_e(4);
$finalString = $str . "|" . $salt;
$hash = hash("sha256", $finalString);
$hashString = $hash . $salt;
$checksum = encrypt_e_openssl($hashString, $key);
return $checksum;
}
function verifychecksum_e($arrayList, $key, $checksumvalue) {
$arrayList = removeCheckSumParam($arrayList);
ksort($arrayList);
$str = getArray2Str($arrayList);
$paytm_hash = decrypt_e_openssl($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) {
$paytm_hash = decrypt_e_openssl($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 $validFlag;
}
function getArray2Str($arrayList) {
$paramStr = "";
$flag = 1;
foreach ($arrayList as $key => $value) {
if ($flag) {
$paramStr .= checkString_e($value);
$flag = 0;
} else {
$paramStr .= "|" . checkString_e($value);
}
}
return $paramStr;
}
function redirect2PG($paramList, $key) {
$hashString = getchecksumFromArray($paramList);
$checksum = encrypt_e_openssl($hashString, $key);
}
function removeCheckSumParam($arrayList) {
if (isset($arrayList["CHECKSUMHASH"])) {
unset($arrayList["CHECKSUMHASH"]);
}
return $arrayList;
}
function getTxnStatus($requestParamList) {
return callAPI(PAYTM_STATUS_QUERY_URL, $requestParamList);
}
function initiateTxnRefund($requestParamList) {
$CHECKSUM = getChecksumFromArray($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;
}
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