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(PHP Extension) Payeezy HMAC ComputationDemonstrates how to calculate the HMAC for a Payeezy REST request.
<?php // The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number. // For example, if using Chilkat v9.5.0.48, then include as shown here: include("chilkat_9_5_0.php"); // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. $crypt = new CkCrypt2(); $prng = new CkPrng(); // An API key such as y6pWAJNyJyjGv66IsVuWnklkKUPFbb0a $apiKey = 'my_api_key'; // An API secret such as 86fbae7030253af3cd15faef2a1f4b67353e41fb6799f576b5093ae52901e6f7 $apiSecret = 'my_api_secret'; // A token such as fdoa-a480ce8951daa73262734cf102641994c1e55e7cdf4c02b6 $token = 'my_merchant_token'; // The nonce is a random number (bytes), something like "6057786719490086000" $nonce = $prng->genRandom(8,'decimal'); print 'nonce = ' . $nonce . "\n"; $dtNow = new CkDateTime(); $dtNow->SetFromCurrentSystemTime(); $sbTimestamp = new CkStringBuilder(); // Get the epoch timestamp in seconds $sbTimestamp->Append($dtNow->getAsUnixTimeStr(false)); // Change it to milliseconds $sbTimestamp->Append('000'); // The timestamp is a number similar to this: 1546011905000 (which is a timestamp taken on 28-Dec-2018). $timestamp = $sbTimestamp->getAsString(); print 'timestamp = ' . $timestamp . "\n"; // Generate the following JSON request body: // { // "merchant_ref": "Astonishing-Sale", // "transaction_type": "authorize", // "method": "token", // "amount": "200", // "currency_code": "USD", // "token": { // "token_type": "FDToken", // "token_data": { // "type": "visa", // "value": "2537446225198291", // "cardholder_name": "JohnSmith", // "exp_date": "1030", // "special_payment": "B" // } // } // } $json = new CkJsonObject(); $json->UpdateString('merchant_ref','Astonishing-Sale'); $json->UpdateString('transaction_type','authorize'); $json->UpdateString('method','token'); $json->UpdateString('amount','200'); $json->UpdateString('currency_code','USD'); $json->UpdateString('token.token_type','FDToken'); $json->UpdateString('token.token_data.type','visa'); $json->UpdateString('token.token_data.value','2537446225198291'); $json->UpdateString('token.token_data.cardholder_name','JohnSmith'); $json->UpdateString('token.token_data.exp_date','1030'); $json->UpdateString('token.token_data.special_payment','B'); // string hashData = apiKey + nonce + timestamp + token + jsonString; $sbHmacData = new CkStringBuilder(); $sbHmacData->Append($apiKey); $sbHmacData->Append($nonce); $sbHmacData->Append($timestamp); $sbHmacData->Append($token); $sbHmacData->Append($json->emit()); // HMAC the data to produce a hex string. $crypt->put_EncodingMode('hexlower'); $crypt->put_MacAlgorithm('hmac'); $crypt->SetMacKeyString($apiSecret); $crypt->put_HashAlgorithm('sha256'); $crypt->put_Charset('utf-8'); $hexHash = $crypt->macStringENC($sbHmacData->getAsString()); // Now base64 encode the hex string: $sbBase64Hash = new CkStringBuilder(); $sbBase64Hash->Append($hexHash); $sbBase64Hash->Encode('base64','utf-8'); print 'This is the Authorization header to be sent with the payeezy request:' . "\n"; print 'Authorization: ' . $sbBase64Hash->getAsString() . "\n"; ?> |
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