// http://www.rassoc.com/gregr/weblog/stories/2002/07/09/webServicesSecurityHttpDigestAuthenticationWithoutActiveDirectory.html
//
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
using System;
using System.Collections;
using System.Collections.Specialized;
public string QOP {
get { return values [4]; }
}
-
+
public bool Parse ()
{
if (!header.ToLower ().StartsWith ("digest "))
pos--;
}
- void SkipNonWhitespace ()
- {
- char c = 'a';
- while (pos < length && c != ' ' && c != '\t' && c != '\r' && c != '\n') {
- c = header [pos++];
- }
- pos--;
- }
-
string GetKey ()
{
SkipWhitespace ();
return false;
SkipWhitespace ();
- if (pos + 1 >= length || header [pos++] != '"')
+ // note: Apache doesn't use " in all case (like algorithm)
+ if (pos + 1 >= length)
return false;
+ bool useQuote = false;
+ if (header [pos] == '"') {
+ pos++;
+ useQuote = true;
+ }
+
int beginQ = pos;
- pos = header.IndexOf ('"', pos);
- if (pos == -1)
- return false;
+ if (useQuote) {
+ pos = header.IndexOf ('"', pos);
+ if (pos == -1)
+ return false;
+ } else {
+ do {
+ char c = header [pos];
+ if (c == ',' || c == ' ' || c == '\t' || c == '\r' || c == '\n')
+ break;
+ } while (++pos < length);
+
+ if (pos >= length && beginQ == pos)
+ return false;
+ }
value = header.Substring (beginQ, pos - beginQ);
pos += 2;
class DigestSession
{
static RandomNumberGenerator rng;
+ DateTime lastUse;
static DigestSession ()
{
public DigestSession ()
{
_nc = 1;
+ lastUse = DateTime.Now;
}
public string Algorithm {
{
parser = new DigestHeaderParser (challenge);
if (!parser.Parse ()) {
- Console.WriteLine ("Parser");
return false;
}
private string HA2 (HttpWebRequest webRequest)
{
- string ha2 = String.Format ("{0}:{1}", webRequest.Method, webRequest.RequestUri.AbsolutePath);
+ string ha2 = String.Format ("{0}:{1}", webRequest.Method, webRequest.RequestUri.PathAndQuery);
if (QOP == "auth-int") {
// TODO
// ha2 += String.Format (":{0}", hentity);
{
string response = String.Format ("{0}:{1}:", HA1 (username, password), Nonce);
if (QOP != null)
- response += String.Format ("{0}:{1}:{2}:", _nc.ToString ("x8"), CNonce, QOP);
+ response += String.Format ("{0}:{1}:{2}:", _nc.ToString ("X8"), CNonce, QOP);
response += HA2 (webRequest);
return HashToHexString (response);
}
if (request == null)
return null;
+ lastUse = DateTime.Now;
NetworkCredential cred = credentials.GetCredential (request.RequestUri, "digest");
+ if (cred == null)
+ return null;
+
string userName = cred.UserName;
if (userName == null || userName == "")
return null;
auth.AppendFormat ("nonce=\"{0}\", ", Nonce);
auth.AppendFormat ("uri=\"{0}\", ", request.Address.PathAndQuery);
- if (QOP != null) // quality of protection (server decision)
- auth.AppendFormat ("qop=\"{0}\", ", QOP);
-
- if (Algorithm != null) // hash algorithm (only MD5 in RFC2617)
+ if (Algorithm != null) { // hash algorithm (only MD5 in RFC2617)
auth.AppendFormat ("algorithm=\"{0}\", ", Algorithm);
+ }
+
+ auth.AppendFormat ("response=\"{0}\", ", Response (userName, password, request));
+
+ if (QOP != null) { // quality of protection (server decision)
+ auth.AppendFormat ("qop=\"{0}\", ", QOP);
+ }
lock (this) {
// _nc MUST NOT change from here...
// until here, now _nc can change
}
- if (QOP != null) // opaque value from the client
+ if (CNonce != null) // opaque value from the client
auth.AppendFormat ("cnonce=\"{0}\", ", CNonce);
if (Opaque != null) // exact same opaque value as received from server
auth.AppendFormat ("opaque=\"{0}\", ", Opaque);
- auth.AppendFormat ("response=\"{0}\"", Response (userName, password, request));
+ auth.Length -= 2; // remove ", "
return new Authorization (auth.ToString ());
}
+
+ public DateTime LastUse {
+ get { return lastUse; }
+ }
}
class DigestClient : IAuthenticationModule
{
- static Hashtable cache; // cache entries by nonce
+ static readonly Hashtable cache = Hashtable.Synchronized (new Hashtable ());
+
+ static Hashtable Cache {
+ get {
+ lock (cache.SyncRoot) {
+ CheckExpired (cache.Count);
+ }
+
+ return cache;
+ }
+ }
- static DigestClient ()
+ static void CheckExpired (int count)
{
- cache = Hashtable.Synchronized (new Hashtable ());
+ 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);
+ }
}
-
- public DigestClient () {}
-
+
// IAuthenticationModule
public Authorization Authenticate (string challenge, WebRequest webRequest, ICredentials credentials)
return null;
string header = challenge.Trim ();
- if (!header.ToLower ().IndexOf ("digest"))
+ if (header.ToLower ().IndexOf ("digest") == -1)
return null;
HttpWebRequest request = webRequest as HttpWebRequest;
if (request == null)
return null;
- DigestSession ds = (DigestSession) cache [request.Address];
+ int hashcode = request.Address.GetHashCode () ^ credentials.GetHashCode ();
+ DigestSession ds = (DigestSession) Cache [hashcode];
bool addDS = (ds == null);
if (addDS)
ds = new DigestSession ();
return null;
if (addDS)
- cache.Add (request.Address, ds);
+ Cache.Add (hashcode, ds);
return ds.Authenticate (webRequest, credentials);
}
if (request == null)
return null;
- // check cache for URI
- DigestSession ds = (DigestSession) cache [request.Address];
+ if (credentials == null)
+ return null;
+
+ int hashcode = request.Address.GetHashCode () ^ credentials.GetHashCode ();
+ DigestSession ds = (DigestSession) Cache [hashcode];
if (ds == null)
return null;
projects / mono.git / blobdiff