private static void CheckExpired(int count)
{
if (count < 10)
{
return;
}
DateTime t = DateTime.MaxValue;
DateTime now = DateTime.Now;
ArrayList list = null;
foreach (int key in cache.Keys)
{
DigestSession elem = (DigestSession)cache[key];
if (elem.LastUse < t && (elem.LastUse - now).Ticks > TimeSpan.TicksPerMinute * 10)
{
t = elem.LastUse;
if (list == null)
{
list = new ArrayList();
}
list.Add(key);
}
}
if (list != null)
{
foreach (int k in list)
{
cache.Remove(k);
}
}
}
// IAuthenticationModule
public Authorization Authenticate(string challenge, WebRequest webRequest, ICredentials credentials)
{
if (credentials == null || challenge == null)
{
return(null);
}
string header = challenge.Trim();
if (header.ToLower().IndexOf("digest") == -1)
{
return(null);
}
HttpWebRequest request = webRequest as HttpWebRequest;
if (request == null)
{
return(null);
}
DigestSession currDS = new DigestSession();
if (!currDS.Parse(challenge))
{
return(null);
}
int hashcode = request.Address.GetHashCode() ^ credentials.GetHashCode() ^ currDS.Nonce.GetHashCode();
DigestSession ds = (DigestSession)Cache[hashcode];
bool addDS = (ds == null);
if (addDS)
{
ds = currDS;
}
else if (!ds.Parse(challenge))
{
return(null);
}
if (addDS)
{
Cache.Add(hashcode, ds);
}
return(ds.Authenticate(webRequest, credentials));
}
public Authorization PreAuthenticate(WebRequest webRequest, ICredentials credentials)
{
HttpWebRequest request = webRequest as HttpWebRequest;
if (request == null)
{
return(null);
}
if (credentials == null)
{
return(null);
}
int hashcode = request.Address.GetHashCode() ^ credentials.GetHashCode();
DigestSession ds = (DigestSession)Cache[hashcode];
if (ds == null)
{
return(null);
}
return(ds.Authenticate(webRequest, credentials));
}
