Revert 50647 - Create HttpAuthController....

net/http/http_auth_controller.cc

Index: net/http/http_auth_controller.cc
===================================================================
--- net/http/http_auth_controller.cc	(revision 50667)
+++ net/http/http_auth_controller.cc	(working copy)
@@ -1,331 +0,0 @@
-// Copyright (c) 2010 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_controller.h"
-
-#include "base/string_util.h"
-#include "net/base/host_resolver.h"
-#include "net/base/net_util.h"
-#include "net/http/http_auth_handler_factory.h"
-#include "net/http/http_network_session.h"
-#include "net/http/http_request_headers.h"
-#include "net/http/http_request_info.h"
-
-namespace net {
-
-namespace {
-
-// Returns a log message for all the response headers related to the auth
-// challenge.
-std::string AuthChallengeLogMessage(HttpResponseHeaders* headers) {
-  std::string msg;
-  std::string header_val;
-  void* iter = NULL;
-  while (headers->EnumerateHeader(&iter, "proxy-authenticate", &header_val)) {
-    msg.append("\n  Has header Proxy-Authenticate: ");
-    msg.append(header_val);
-  }
-
-  iter = NULL;
-  while (headers->EnumerateHeader(&iter, "www-authenticate", &header_val)) {
-    msg.append("\n  Has header WWW-Authenticate: ");
-    msg.append(header_val);
-  }
-
-  // RFC 4559 requires that a proxy indicate its support of NTLM/Negotiate
-  // authentication with a "Proxy-Support: Session-Based-Authentication"
-  // response header.
-  iter = NULL;
-  while (headers->EnumerateHeader(&iter, "proxy-support", &header_val)) {
-    msg.append("\n  Has header Proxy-Support: ");
-    msg.append(header_val);
-  }
-
-  return msg;
-}
-
-}  // namespace
-
-HttpAuthController::HttpAuthController(
-    HttpAuth::Target target,
-    const GURL& auth_url,
-    scoped_refptr<HttpNetworkSession> session,
-    const BoundNetLog& net_log)
-    : target_(target),
-      auth_url_(auth_url),
-      auth_origin_(auth_url.GetOrigin()),
-      auth_path_(HttpAuth::AUTH_PROXY ? std::string() : auth_url.path()),
-      embedded_identity_used_(false),
-      default_credentials_used_(false),
-      session_(session),
-      net_log_(net_log) {
-}
-
-int HttpAuthController::MaybeGenerateAuthToken(const HttpRequestInfo* request,
-                                               CompletionCallback* callback) {
-  bool needs_auth = HaveAuth() || SelectPreemptiveAuth();
-  if (!needs_auth)
-    return OK;
-  const std::wstring* username = NULL;
-  const std::wstring* password = NULL;
-  if (identity_.source != HttpAuth::IDENT_SRC_DEFAULT_CREDENTIALS) {
-    username = &identity_.username;
-    password = &identity_.password;
-  }
-  DCHECK(auth_token_.empty());
-  return handler_->GenerateAuthToken(username, password, request, callback,
-                                     &auth_token_);
-}
-
-bool HttpAuthController::SelectPreemptiveAuth() {
-  DCHECK(!HaveAuth());
-  DCHECK(identity_.invalid);
-
-  // Don't do preemptive authorization if the URL contains a username/password,
-  // since we must first be challenged in order to use the URL's identity.
-  if (auth_url_.has_username())
-    return false;
-
-  // SelectPreemptiveAuth() is on the critical path for each request, so it
-  // is expected to be fast. LookupByPath() is fast in the common case, since
-  // the number of http auth cache entries is expected to be very small.
-  // (For most users in fact, it will be 0.)
-  HttpAuthCache::Entry* entry = session_->auth_cache()->LookupByPath(
-      auth_origin_, auth_path_);
-  if (!entry)
-    return false;
-
-  // Try to create a handler using the previous auth challenge.
-  scoped_ptr<HttpAuthHandler> handler_preemptive;
-  int rv_create = session_->http_auth_handler_factory()->
-      CreatePreemptiveAuthHandlerFromString(entry->auth_challenge(), target_,
-                                            auth_origin_,
-                                            entry->IncrementNonceCount(),
-                                            net_log_, &handler_preemptive);
-  if (rv_create != OK)
-    return false;
-
-  // Set the state
-  identity_.source = HttpAuth::IDENT_SRC_PATH_LOOKUP;
-  identity_.invalid = false;
-  identity_.username = entry->username();
-  identity_.password = entry->password();
-  handler_.swap(handler_preemptive);
-  return true;
-}
-
-void HttpAuthController::AddAuthorizationHeader(
-    HttpRequestHeaders* authorization_headers) {
-  DCHECK(HaveAuth());
-  DCHECK(!auth_token_.empty());
-  authorization_headers->SetHeader(
-      HttpAuth::GetAuthorizationHeaderName(target_), auth_token_);
-  auth_token_.clear();
-}
-
-int HttpAuthController::HandleAuthChallenge(
-    scoped_refptr<HttpResponseHeaders> headers,
-    int load_flags,
-    bool establishing_tunnel) {
-  DCHECK(headers);
-  DCHECK(auth_origin_.is_valid());
-
-  LOG(INFO) << "The " << HttpAuth::GetAuthTargetString(target_) << " "
-            << auth_origin_ << " requested auth"
-            << AuthChallengeLogMessage(headers.get());
-
-  // The auth we tried just failed, hence it can't be valid. Remove it from
-  // the cache so it won't be used again.
-  // TODO(wtc): IsFinalRound is not the right condition.  In a multi-round
-  // auth sequence, the server may fail the auth in round 1 if our first
-  // authorization header is broken.  We should inspect response_.headers to
-  // determine if the server already failed the auth or wants us to continue.
-  // See http://crbug.com/21015.
-  if (HaveAuth() && handler_->IsFinalRound()) {
-    InvalidateRejectedAuthFromCache();
-    handler_.reset();
-    identity_ = HttpAuth::Identity();
-  }
-
-  identity_.invalid = true;
-
-  if (target_ != HttpAuth::AUTH_SERVER ||
-      !(load_flags & LOAD_DO_NOT_SEND_AUTH_DATA)) {
-    // Find the best authentication challenge that we support.
-    HttpAuth::ChooseBestChallenge(session_->http_auth_handler_factory(),
-                                  headers, target_, auth_origin_, net_log_,
-                                  &handler_);
-  }
-
-  if (!handler_.get()) {
-    if (establishing_tunnel) {
-      LOG(ERROR) << "Can't perform auth to the "
-                 << HttpAuth::GetAuthTargetString(target_) << " "
-                 << auth_origin_ << " when establishing a tunnel"
-                 << AuthChallengeLogMessage(headers.get());
-
-      // We are establishing a tunnel, we can't show the error page because an
-      // active network attacker could control its contents.  Instead, we just
-      // fail to establish the tunnel.
-      DCHECK(target_ == HttpAuth::AUTH_PROXY);
-      return ERR_PROXY_AUTH_REQUESTED;
-    }
-    // We found no supported challenge -- let the transaction continue
-    // so we end up displaying the error page.
-    return OK;
-  }
-
-  if (handler_->NeedsIdentity()) {
-    // Pick a new auth identity to try, by looking to the URL and auth cache.
-    // If an identity to try is found, it is saved to identity_.
-    SelectNextAuthIdentityToTry();
-  } else {
-    // Proceed with the existing identity or a null identity.
-    //
-    // TODO(wtc): Add a safeguard against infinite transaction restarts, if
-    // the server keeps returning "NTLM".
-    identity_.invalid = false;
-  }
-
-  // From this point on, we are restartable.
-
-  if (identity_.invalid) {
-    // We have exhausted all identity possibilities, all we can do now is
-    // pass the challenge information back to the client.
-    PopulateAuthChallenge();
-  }
-
-  // SPN determination (for Negotiate) requires a DNS lookup to find the
-  // canonical name. This needs to be done asynchronously to prevent blocking
-  // the IO thread.
-  if (handler_->NeedsCanonicalName())
-    return ERR_AUTH_NEEDS_CANONICAL_NAME;
-
-  return OK;
-}
-
-int HttpAuthController::ResolveCanonicalName(CompletionCallback* callback) {
-  DCHECK(handler_.get());
-  return handler_->ResolveCanonicalName(session_->host_resolver(), callback);
-}
-
-void HttpAuthController::ResetAuth(const std::wstring& username,
-                                   const std::wstring& password) {
-  DCHECK(identity_.invalid || (username.empty() && password.empty()));
-
-  if (identity_.invalid) {
-    // Update the username/password.
-    identity_.source = HttpAuth::IDENT_SRC_EXTERNAL;
-    identity_.invalid = false;
-    identity_.username = username;
-    identity_.password = password;
-  }
-
-  DCHECK(identity_.source != HttpAuth::IDENT_SRC_PATH_LOOKUP);
-
-  // Add the auth entry to the cache before restarting. We don't know whether
-  // the identity is valid yet, but if it is valid we want other transactions
-  // to know about it. If an entry for (origin, handler->realm()) already
-  // exists, we update it.
-  //
-  // If identity_.source is HttpAuth::IDENT_SRC_NONE or
-  // HttpAuth::IDENT_SRC_DEFAULT_CREDENTIALS, identity_ contains no
-  // identity because identity is not required yet or we're using default
-  // credentials.
-  //
-  // TODO(wtc): For NTLM_SSPI, we add the same auth entry to the cache in
-  // round 1 and round 2, which is redundant but correct.  It would be nice
-  // to add an auth entry to the cache only once, preferrably in round 1.
-  // See http://crbug.com/21015.
-  switch (identity_.source) {
-    case HttpAuth::IDENT_SRC_NONE:
-    case HttpAuth::IDENT_SRC_DEFAULT_CREDENTIALS:
-      break;
-    default:
-      session_->auth_cache()->Add(auth_origin_, handler_->realm(),
-                                  handler_->scheme(), handler_->challenge(),
-                                  identity_.username, identity_.password,
-                                  auth_path_);
-      break;
-  }
-}
-
-void HttpAuthController::InvalidateRejectedAuthFromCache() {
-  DCHECK(HaveAuth());
-
-  // TODO(eroman): this short-circuit can be relaxed. If the realm of
-  // the preemptively used auth entry matches the realm of the subsequent
-  // challenge, then we can invalidate the preemptively used entry.
-  // Otherwise as-is we may send the failed credentials one extra time.
-  if (identity_.source == HttpAuth::IDENT_SRC_PATH_LOOKUP)
-    return;
-
-  // Clear the cache entry for the identity we just failed on.
-  // Note: we require the username/password to match before invalidating
-  // since the entry in the cache may be newer than what we used last time.
-  session_->auth_cache()->Remove(auth_origin_, handler_->realm(),
-                                 handler_->scheme(), identity_.username,
-                                 identity_.password);
-}
-
-bool HttpAuthController::SelectNextAuthIdentityToTry() {
-  DCHECK(handler_.get());
-  DCHECK(identity_.invalid);
-
-  // Try to use the username/password encoded into the URL first.
-  if (target_ == HttpAuth::AUTH_SERVER && auth_url_.has_username() &&
-      !embedded_identity_used_) {
-    identity_.source = HttpAuth::IDENT_SRC_URL;
-    identity_.invalid = false;
-    // Extract the username:password from the URL.
-    GetIdentityFromURL(auth_url_,
-                       &identity_.username,
-                       &identity_.password);
-    embedded_identity_used_ = true;
-    // TODO(eroman): If the password is blank, should we also try combining
-    // with a password from the cache?
-    return true;
-  }
-
-  // Check the auth cache for a realm entry.
-  HttpAuthCache::Entry* entry =
-    session_->auth_cache()->Lookup(auth_origin_, handler_->realm(),
-                                   handler_->scheme());
-
-  if (entry) {
-    identity_.source = HttpAuth::IDENT_SRC_REALM_LOOKUP;
-    identity_.invalid = false;
-    identity_.username = entry->username();
-    identity_.password = entry->password();
-    return true;
-  }
-
-  // Use default credentials (single sign on) if this is the first attempt
-  // at identity.  Do not allow multiple times as it will infinite loop.
-  // We use default credentials after checking the auth cache so that if
-  // single sign-on doesn't work, we won't try default credentials for future
-  // transactions.
-  if (!default_credentials_used_ && handler_->AllowsDefaultCredentials()) {
-    identity_.source = HttpAuth::IDENT_SRC_DEFAULT_CREDENTIALS;
-    identity_.invalid = false;
-    default_credentials_used_ = true;
-    return true;
-  }
-
-  return false;
-}
-
-void HttpAuthController::PopulateAuthChallenge() {
-  // Populates response_.auth_challenge with the authentication challenge info.
-  // This info is consumed by URLRequestHttpJob::GetAuthChallengeInfo().
-
-  auth_info_ = new AuthChallengeInfo;
-  auth_info_->is_proxy = target_ == HttpAuth::AUTH_PROXY;
-  auth_info_->host_and_port = ASCIIToWide(GetHostAndPort(auth_origin_));
-  auth_info_->scheme = ASCIIToWide(handler_->scheme());
-  // TODO(eroman): decode realm according to RFC 2047.
-  auth_info_->realm = ASCIIToWide(handler_->realm());
-}
-
-}  // namespace net