Implement the NTLM authentication scheme by porting...

net/http/http_auth_handler_digest.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/http/http_auth_handler_digest.h"
 
 #include "base/md5.h"
 #include "base/rand_util.h"
 #include "base/string_util.h"
 #include "net/base/net_util.h"
@@ skipping 182 matching lines @@
 //     [opaque="<opaque-token-value>"]
 //     [stale="<true-or-false>"]
 //     [algorithm="<digest-algorithm>"]
 //     [qop="<list-of-qop-values>"]
 //     [<extension-directive>]
 bool HttpAuthHandlerDigest::ParseChallenge(
     std::string::const_iterator challenge_begin,
     std::string::const_iterator challenge_end) {
   scheme_ = "digest";
   score_ = 2;
+  properties_ = ENCRYPTS_IDENTITY;
 
   // Initialize to defaults.
   stale_ = false;
   algorithm_ = ALGORITHM_UNSPECIFIED;
   qop_ = QOP_UNSPECIFIED;
   realm_ = nonce_ = domain_ = opaque_ = std::string();
 
   HttpAuth::ChallengeTokenizer props(challenge_begin, challenge_end);
 
   if (!props.valid() || !LowerCaseEqualsASCII(props.scheme(), "digest"))
@@ skipping 55 matching lines @@
       }
     }
   } else {
     DLOG(INFO) << "Skipping unrecognized digest property";
     // TODO(eroman): perhaps we should fail instead of silently skipping?
   }
   return true;
 }
 
 }  // namespace net