HMAC Auth Sample Codes

Find below different samples codes already written to make life easy for you across various languages to calculate the signature digest.

Php
Java
C#
Php
<?php
$request_type = "GET";
$endpoint = "/api/baxipay/superagent/account/balance";
$request_date = "Thu, 19 Dec 2019 17:40:26 GMT";
$user_secret = "YOUR_USER_SECRET";
$json_payload = '{ "name":"tayo" }';
$encoded_payload_hash = "";
function calculate_digest($request_type="GET", $endpoint, $request_date, $user_secret, $json_payload="")
{
// 1. CONVERT DATE TO UNIX TIMESTAMP
$timestamp = strtotime($request_date);
if(!empty($json_payload))
{
// 2. DO A SHA256 OF YOUR JSON PAYLOAD (IF AVAILABLE)
$payload_hash = hash('sha256', $json_payload, $raw_output=TRUE);
// 3. ENCODE THE PAYLOAD HASH WITH BASE-64
$encoded_payload_hash = base64_encode($payload_hash);
}else{
$encoded_payload_hash = ""; // NO PAYLOAD
}
// 4. CREATE A SECURITY STRING FOR THIS REQUEST
$signed_string = $request_type.$endpoint.$timestamp.$encoded_payload_hash;
// 5. DO A UTF-8 ENCODE OF THE SECURITY STRING
$encoded_signed_string = utf8_encode($signed_string);
// 6. SIGN USING HMAC-SHA1: Key = USER_SECRET, Message = ENCODED SIGNED STRING
$hash_signature = hash_hmac("sha1", $encoded_signed_string, $user_secret, $raw_output=TRUE);
// 7. CONVERT HASH SIGNATURE TO BASE 64
$final_signature = base64_encode($hash_signature);
return $final_signature;
}

Java

C#