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<?php
/*
 * Collection de fonctions pour une authentification externe POP3
 */

// Constantes d'erreur
define("ERR_POP3_AUTH_BADSOCK", -1);
define("ERR_POP3_AUTH_SERVERNACK", -2);
define("ERR_POP3_AUTH_BADUSER", -3);
define("ERR_POP3_AUTH_BADPASS", -4);
define("ERR_BAD_PARAMS", -100);

// Fonction d'authentification pop3
function pop3_auth_simple($mail, $upw)
{
	if ( ($ret = ereg ( "(^.*)@([[:alnum:]]+\.[[:alnum:]]+)", $mail, $re_tokens ) ) )
	{
		/* $re_tokens	[]
		 *			[0] : email complet
		 *			[1] : nom_mail
		 *			[2] : serveur_mail
		 */
		require_once('config.inc.php');
		$srv_conf = $CONFIG['AUTH']['POP']['SERVERS'][strtolower($re_tokens[2])];
		if ( is_array($srv_conf) )
		{
			$server=$srv_conf['subdomain'];
			$port=$srv_conf['port'];
			if ( $srv_conf['username_is_full_mail'] )
				{ $user = $mail; } else { $user = $re_tokens[1]; }
			return pop3_auth ($server, $port, $user, $upw);
		}
	}
	/* DEBUG
	echo $mail . "\n" . $ret . "\n";;
	print_r($re_tokens);
	*/
	return ERR_BAD_PARAMS;
}

function pop3_auth ($server, $port, $user, $upw)
{
	//echo "DEBUG : fsockopen($server, $port, $errno, $errstr, 10);";
	$sock = @fsockopen($server, $port, $errno, $errstr, 10);
	if ( $sock === false)
	{
		return ERR_POP3_AUTH_BADSOCK;
	}

	//stream_set_timeout ( $sock, 1, 0 );
	
	fputs($sock, "user $user\r\n");

	if ( pop3_GetAndTestReply($sock) === false )
	{
		return ERR_POP3_AUTH_BADUSER;
	}

	fputs($sock, "pass $upw\r\n");

	if ( pop3_GetAndTestReply($sock) === false )
	{
		return ERR_POP3_AUTH_BADPASS;
	}

	fputs($sock, "quit\r\n");
	
	return 0;
}

// Fonction interne testant les r�ponses du serveur POP3
function pop3_GetAndTestReply($sock)
{
	$reply = fgets($sock, 128);
	echo $reply . "\n";
	return ( substr($reply, 0, 4) == "+OK " );
}
?>