I set up squid with authentication helper following along the line the guide here http://www.freesoftwaremagazine.com/articles/authentication_with_squid the only difference is that my users together with NTLM password hashes are stored in a mysql database.
The php-function that compute the ntlm hash is the following.
function ntlm_hash($txt)
{
$txt = iconv('UTF-8', 'UTF-16LE', $txt);
$md4 = bin2hex(mhash(MHASH_MD4, $txt));
return strtoupper($md4);
}
Now I am bit concerned about security and I do not want to use basic http authentication. I know one solution is to use SSL with squid, but by default squid on debian is built without SSL support. The other solution I was thinking is to use NTLM authentication helper; the protocol is described here http://squid.sourceforge.net/ntlm/squid_helper_protocol.html
Unfortunately I did not find anything interesting to guide me (besides the specification at the link), does anybody know how a possibile implementation may works? For instance it is not clear if I can implement the protocol only with NTLM password hashes. Does anybody have other suggestions to strengthen the user authentication? Considering that I have only available the NTLM hash of the password.
