如何生成hash_hmac sha1 php？

Question

I have two problem with hmac

First:

$klucz = ""; 
$url = ""; 
$nazwaUsera = "";
$nazwaKlucza = "faktura";

$curlHandle = curl_init($url);

$hashWiadomosci = hmac($klucz, $url .$nazwaUsera.$nazwaKlucza);
$headers = array(
'Accept: application/pdf',
'Content-type: application/pdf; charset = UTF-8',
'Authentication: IAPIS user='.$nazwaUsera.', hmac-
sha1='.$hashWiadomosci
);

if is hmac problem is: Fatal error: Uncaught Error: Call to undefined function hmac()

Bat if is

$klucz = ""; 
$url = ""; 
$nazwaUsera = "";
$nazwaKlucza = "faktura";

$curlHandle = curl_init($url);

$hashWiadomosci = hash_hmac($klucz, $url, $nazwaUsera.$nazwaKlucza);
$headers = array(
'Accept: application/pdf',
'Content-type: application/pdf; charset = UTF-8',
'Authentication: IAPIS user='.$nazwaUsera.', hmac-
sha1='.$hashWiadomosci
);

problem is: Warning: hash_hmac(): Unknown hashing algorithm: EC8A18CEC9D1F1B2

how solved this?

Answer 1

Try this:

hashWiadomosci = hash_hmac('sha256', $klucz . $url, $nazwaUsera.$nazwaKlucza);

First parameter must be the hash algorithm you need to be used (you can call hash_algos to inspect supported algorithms in your platform. IE md5", "sha256", "haval160,4".