Added NSEC3 hash generation and error handling for the UNPACK function

Author: metaregistrar

DNS/dnsProtocol.php

@@ -51,6 +51,7 @@ function __construct($logging = false)
         $this->timeout=60;
         $this->udp=false;
         $this->types=new DNSTypes();
+        set_error_handler(array($this,'error_handler'));
         $this->writelog("dnsProtocol Class Initialised");
     }
 
@@ -62,7 +63,16 @@ function __destruct()
         }
     }
 
-    
+    function error_handler($errno = 0, $errstr = null, $errfile = null, $errline = null)
+    {
+        // If error is suppressed with @, don't throw an exception
+        if (error_reporting() === 0)
+        {
+            return true; // return true to continue through the others error handlers
+        }
+        throw new DnsException('Found '.$errstr.' in line '.$errline.' of '.$errfile, $errno, null);
+    }
+  
 
     function Query($question,$type="A")
     {
@@ -345,4 +355,62 @@ function registrynameservers($tld)
         return $dnsservers;
     }
 
+    function base32encode($input, $padding = true) {
+
+	$map = array(
+		'0', '1', '2', '3', '4', '5', '6', '7', //  7
+		'8', '9', 'a', 'b', 'c', 'd', 'e', 'f', // 15
+		'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', // 23
+		'o', 'p', 'q', 'r', 's', 't', 'u', 'v', // 31
+		'='  // padding char
+	);
+
+	if(empty($input)) return "";
+	$input = str_split($input);
+	$binaryString = "";
+	for($i = 0; $i < count($input); $i++) {
+		$binaryString .= str_pad(base_convert(ord($input[$i]), 10, 2), 8, '0', STR_PAD_LEFT);
+	}
+	$fiveBitBinaryArray = str_split($binaryString, 5);
+	$base32 = "";
+	$i=0;
+	while($i < count($fiveBitBinaryArray)) {
+		$base32 .= $map[base_convert(str_pad($fiveBitBinaryArray[$i], 5,'0'), 2, 10)];
+		$i++;
+	}
+	if($padding && ($x = strlen($binaryString) % 40) != 0) {
+		if($x == 8) $base32 .= str_repeat($map[32], 6);
+		else if($x == 16) $base32 .= str_repeat($map[32], 4);
+		else if($x == 24) $base32 .= str_repeat($map[32], 3);
+		else if($x == 32) $base32 .= $map[32];
+	}
+	return $base32;
+}
+
+function nsec3hash($qname, $salt=null, $iterations='-')
+{
+    //echo $this->nsec3hash('www.lunetkade.nl', 'AB', 1);
+	$salt = pack('H*' , $salt); //hex2bin() in php 5.4
+	$iterations = intval($iterations);
+	$toHash='';
+
+	$qparts = explode('.', strtolower($qname).'.');
+	foreach ($qparts as $part)
+    {
+		$toHash .= chr(strlen($part)).$part;
+	}
+
+	//echo bin2hex($toHash.$salt)."\n";
+	do
+    {
+		$toHash .= $salt;
+		$toHash = sha1($toHash, true);
+		$iterations--;
+	}
+    while ($iterations >= 0);
+	return base32encode($toHash);
+}
+
+
+
 }