Auth/OpenID/HMAC.php-Dateireferenz

gehe zum Quellcode dieser Datei

Namensbereiche
namespace	OpenID
Aufzählungen
enum	Auth_OpenID_SHA1_BLOCKSIZE
Funktionen
	Auth_OpenID_SHA1 ($text)
	Auth_OpenID_HMACSHA1 ($key, $text)

---

Dokumentation der Aufzählungstypen

enum Auth_OpenID_SHA1_BLOCKSIZE

SHA1_BLOCKSIZE is this module's SHA1 blocksize used by the fallback implementation.

Definiert in Zeile 23 der Datei HMAC.php.

---

Dokumentation der Funktionen

Auth_OpenID_HMACSHA1	(	$	key,
		$	text
	)

Compute an HMAC/SHA1 hash.

private

Parameter:

	string	$key The HMAC key
	string	$text The message text to hash

Rückgabe:

string $mac The MAC

Definiert in Zeile 57 der Datei HMAC.php.

{
    if (Auth_OpenID::bytes($key) > Auth_OpenID_SHA1_BLOCKSIZE) {
        $key = Auth_OpenID_SHA1($key, true);
    }

    $key = str_pad($key, Auth_OpenID_SHA1_BLOCKSIZE, chr(0x00));
    $ipad = str_repeat(chr(0x36), Auth_OpenID_SHA1_BLOCKSIZE);
    $opad = str_repeat(chr(0x5c), Auth_OpenID_SHA1_BLOCKSIZE);
    $hash1 = Auth_OpenID_SHA1(($key ^ $ipad) . $text, true);
    $hmac = Auth_OpenID_SHA1(($key ^ $opad) . $hash1, true);
    return $hmac;
}

if (function_exists('hash') &&
    function_exists('hash_algos') &&
    (in_array('sha256', hash_algos()))) {
    function Auth_OpenID_SHA256($text)
    {
        // PHP 5 case: 'hash' available and 'sha256' algo supported.
        return hash('sha256', $text, true);
    }
    define('Auth_OpenID_SHA256_SUPPORTED', true);
} else {

Auth_OpenID_SHA1

(

$

text

)

Definiert in Zeile 25 der Datei HMAC.php.

{
    if (function_exists('hash') &&
        function_exists('hash_algos') &&
        (in_array('sha1', hash_algos()))) {
        // PHP 5 case (sometimes): 'hash' available and 'sha1' algo
        // supported.
        return hash('sha1', $text, true);
    } else if (function_exists('sha1')) {
        // PHP 4 case: 'sha1' available.
        $hex = sha1($text);
        $raw = '';
        for ($i = 0; $i < 40; $i += 2) {
            $hexcode = substr($hex, $i, 2);
            $charcode = (int)base_convert($hexcode, 16, 10);
            $raw .= chr($charcode);
        }
        return $raw;
    } else {
        // Explode.
        trigger_error('No SHA1 function found', E_USER_ERROR);
    }
}