[NSE patch] base64.enc properly encode last character

[Sven Klemm <sven () c3d2 de>]

Hi,

the base64 nse library does not properly encode the last character of 
a string when the string length is not a multiple of 6 bit.

I've attached a patch for the issue.

Cheers,
Sven

--
Sven Klemm
http://cthulhu.c3d2.de/~sven/

Index: nselib/base64.lua
===================================================================
--- nselib/base64.lua   (revision 9342)
+++ nselib/base64.lua   (working copy)
@@ -142,12 +142,10 @@
                end
        end
        if #nbyte == 2 then
-               append(b64dataBuf, b64enc6bit(nbyte)) 
-                       -- relying on pack's 0-autopadding
+               append(b64dataBuf, b64enc6bit(nbyte..'0000')) 
                append(b64dataBuf, "==")
        elseif #nbyte == 4 then
-               append(b64dataBuf, b64enc6bit(nbyte))
-                       -- relying on pack's 0-autopadding
+               append(b64dataBuf, b64enc6bit(nbyte..'00'))
                append(b64dataBuf, '=')
        end
        return concat(b64dataBuf)


_______________________________________________
Sent through the nmap-dev mailing list
http://cgi.insecure.org/mailman/listinfo/nmap-dev
Archived at http://SecLists.Org