sha256 - Generate HMAC Signature on PHP

766

how do you apply the system below to php?

StringToSign = HTTPMethod+":"+RelativeUrl+":"+AccessToken+":"+
Lowercase(HexEncode(SHA-256(RequestBody)))+":"+Timestamp

Signature = HMAC-SHA256(apiSecret, StringToSign)

my script :

$encoderData = json_encode($bodyToHash, JSON_UNESCAPED_SLASHES);
$hash        = hash("sha256", $encoderData);
$stringToSign   = $Method. ":" .$url . ":" . $auth_token . ":" . $hash . ":" . $Timestamp;
$auth_signature = hash_hmac('sha256', $secret_key, $stringToSign,false);

Thank you,

190

Answer

Solution:

I don't know what you mean but You can try this;

<?php
    $stringToSign = 'abcd';
    $apiSecret = 'secretkey';

    $hashed = hash_hmac('sha256', $stringToSign, $apiSecret);
?>

250

Answer

Solution:

doing some BCA stuff? :p

you can use this function if you wan to useGET:

strtolower(hash('sha256', ''));

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