Allow dynamic updating of authentication policies

chrome/browser/io_thread.cc

 // Copyright (c) 2012 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 "chrome/browser/io_thread.h"
 
 #include <vector>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 440 matching lines @@
     : net_log_(net_log),
 #if defined(ENABLE_EXTENSIONS)
       extension_event_router_forwarder_(extension_event_router_forwarder),
 #endif
       globals_(NULL),
       is_spdy_disabled_by_policy_(false),
       is_quic_allowed_by_policy_(true),
       creation_time_(base::TimeTicks::Now()),
       weak_factory_(this) {
   auth_schemes_ = local_state->GetString(prefs::kAuthSchemes);
-  negotiate_disable_cname_lookup_ = local_state->GetBoolean(
-      prefs::kDisableAuthNegotiateCnameLookup);
-  negotiate_enable_port_ = local_state->GetBoolean(
-      prefs::kEnableAuthNegotiatePort);
-  auth_server_whitelist_ = local_state->GetString(prefs::kAuthServerWhitelist);
-  auth_delegate_whitelist_ = local_state->GetString(
-      prefs::kAuthNegotiateDelegateWhitelist);
+  negotiate_disable_cname_lookup_.Init(
+      prefs::kDisableAuthNegotiateCnameLookup, local_state,
+      base::Bind(&IOThread::UpdateNegotiateDisableCnameLookup,
+                 weak_factory_.GetWeakPtr()));
+  scoped_refptr<base::SingleThreadTaskRunner> io_thread_proxy =
+      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO);
+  negotiate_disable_cname_lookup_.MoveToThread(io_thread_proxy);
+  negotiate_enable_port_.Init(prefs::kEnableAuthNegotiatePort, local_state,
+                              base::Bind(&IOThread::UpdateNegotiateEnablePort,
+                                         weak_factory_.GetWeakPtr()));
+  negotiate_enable_port_.MoveToThread(io_thread_proxy);
+  auth_server_whitelist_.Init(
+      prefs::kAuthServerWhitelist, local_state,
+      base::Bind(&IOThread::UpdateSecurityManager, weak_factory_.GetWeakPtr()));
+  auth_server_whitelist_.MoveToThread(io_thread_proxy);
+  auth_delegate_whitelist_.Init(
+      prefs::kAuthNegotiateDelegateWhitelist, local_state,
+      base::Bind(&IOThread::UpdateSecurityManager, weak_factory_.GetWeakPtr()));
+  auth_delegate_whitelist_.MoveToThread(io_thread_proxy);
   gssapi_library_name_ = local_state->GetString(prefs::kGSSAPILibraryName);
-  auth_android_negotiate_account_type_ =
-      local_state->GetString(prefs::kAuthAndroidNegotiateAccountType);
+  auth_android_negotiate_account_type_.Init(
+      prefs::kAuthAndroidNegotiateAccountType, local_state,
+      base::Bind(&IOThread::UpdateAndroidAuthNegotiateAccount,
+                 weak_factory_.GetWeakPtr()));
+  auth_android_negotiate_account_type_.MoveToThread(io_thread_proxy);
   pref_proxy_config_tracker_.reset(
       ProxyServiceFactory::CreatePrefProxyConfigTrackerOfLocalState(
           local_state));
   ChromeNetworkDelegate::InitializePrefsOnUIThread(
       &system_enable_referrers_,
       NULL,
       NULL,
       NULL,
       local_state);
   ssl_config_service_manager_.reset(
       SSLConfigServiceManager::CreateDefaultManager(local_state));
 
   base::Value* dns_client_enabled_default = new base::FundamentalValue(
       chrome_browser_net::ConfigureAsyncDnsFieldTrial());
   local_state->SetDefaultPrefValue(prefs::kBuiltInDnsClientEnabled,
                                    dns_client_enabled_default);
   chrome_browser_net::LogAsyncDnsPrefSource(
       local_state->FindPreference(prefs::kBuiltInDnsClientEnabled));
 
   dns_client_enabled_.Init(prefs::kBuiltInDnsClientEnabled,
                            local_state,
                            base::Bind(&IOThread::UpdateDnsClientEnabled,
                                       base::Unretained(this)));
-  dns_client_enabled_.MoveToThread(
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
+  dns_client_enabled_.MoveToThread(io_thread_proxy);
 
   quick_check_enabled_.Init(prefs::kQuickCheckEnabled,
                             local_state);
-  quick_check_enabled_.MoveToThread(
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
+  quick_check_enabled_.MoveToThread(io_thread_proxy);
 
 #if defined(ENABLE_CONFIGURATION_POLICY)
   is_spdy_disabled_by_policy_ = policy_service->GetPolicies(
       policy::PolicyNamespace(policy::POLICY_DOMAIN_CHROME, std::string())).Get(
           policy::key::kDisableSpdy) != NULL;
 
   const base::Value* value = policy_service->GetPolicies(
       policy::PolicyNamespace(policy::POLICY_DOMAIN_CHROME,
       std::string())).GetValue(policy::key::kQuicAllowed);
   if (value)
@@ skipping 200 matching lines @@
   // TODO(erikchen): Remove ScopedTracker below once http://crbug.com/466432
   // is fixed.
   tracked_objects::ScopedTracker tracking_profile10(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
           "466432 IOThread::InitAsync::CertPolicyEnforcer"));
   net::CertPolicyEnforcer* policy_enforcer = new net::CertPolicyEnforcer;
   globals_->cert_policy_enforcer.reset(policy_enforcer);
 
   globals_->ssl_config_service = GetSSLConfigService();
 
-  globals_->http_auth_handler_factory.reset(CreateDefaultAuthHandlerFactory(
-      globals_->host_resolver.get()));
+  CreateDefaultAuthHandlerFactory();
   globals_->http_server_properties.reset(new net::HttpServerPropertiesImpl());
   // For the ProxyScriptFetcher, we use a direct ProxyService.
   globals_->proxy_script_fetcher_proxy_service =
       net::ProxyService::CreateDirectWithNetLog(net_log_);
   // In-memory cookie store.
   // TODO(erikchen): Remove ScopedTracker below once http://crbug.com/466432
   // is fixed.
   tracked_objects::ScopedTracker tracking_profile11(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
           "466432 IOThread::InitAsync::CreateCookieStore::Start"));
@@ skipping 241 matching lines @@
   registry->RegisterStringPref(prefs::kAuthAndroidNegotiateAccountType,
                                std::string());
   registry->RegisterStringPref(
       data_reduction_proxy::prefs::kDataReductionProxy, std::string());
   registry->RegisterBooleanPref(prefs::kEnableReferrers, true);
   data_reduction_proxy::RegisterPrefs(registry);
   registry->RegisterBooleanPref(prefs::kBuiltInDnsClientEnabled, true);
   registry->RegisterBooleanPref(prefs::kQuickCheckEnabled, true);
 }
 
-net::HttpAuthHandlerFactory* IOThread::CreateDefaultAuthHandlerFactory(
-    net::HostResolver* resolver) {
+void IOThread::UpdateSecurityManager() {
   net::HttpAuthFilterWhitelist* auth_filter_default_credentials = NULL;
-  if (!auth_server_whitelist_.empty()) {
+  std::string server_whitelist = auth_server_whitelist_.GetValue();
+  if (!server_whitelist.empty()) {
     auth_filter_default_credentials =
-        new net::HttpAuthFilterWhitelist(auth_server_whitelist_);
+        new net::HttpAuthFilterWhitelist(server_whitelist);
   }
   net::HttpAuthFilterWhitelist* auth_filter_delegate = NULL;
-  if (!auth_delegate_whitelist_.empty()) {
-    auth_filter_delegate =
-        new net::HttpAuthFilterWhitelist(auth_delegate_whitelist_);
-  }
+  std::string delegate_whitelist = auth_delegate_whitelist_.GetValue();
+  if (!delegate_whitelist.empty())
+    auth_filter_delegate = new net::HttpAuthFilterWhitelist(delegate_whitelist);
   globals_->url_security_manager.reset(

[asanka, 2015/10/26 15:11:54]

This isn't safe anymore since that UpdateSecurityManager() can be called while
there are active on-going auth handshakes. The AuthHandlers require that the
URLSecurityManager outlive the handler.

HttpAuthHandlerNegotiate, for example, keeps a pointer to the URLSecurityManager
which would end up pointing to a freed object after this reset() call. I see you
are updating the security manager for the factories below, but that doesn't take
existing AuthHandlers into account.

[aberent, 2015/10/27 19:34:13]

Fixed by keeping the security manager and updating the whitelists within it.

       net::URLSecurityManager::Create(auth_filter_default_credentials,
                                       auth_filter_delegate));
+  globals_->http_auth_handler_factory->SetSecurityManager(
+      globals_->url_security_manager.get());
+}
+
+void IOThread::UpdateAndroidAuthNegotiateAccount() {
+  globals_->http_auth_handler_factory->SetAndroidAuthNegotiateAccountType(
+      make_scoped_ptr(
+          new std::string(auth_android_negotiate_account_type_.GetValue())));
+}
+
+void IOThread::UpdateNegotiateDisableCnameLookup() {
+  globals_->http_auth_handler_factory->SetNegotiateDisableCnameLookup(
+      negotiate_disable_cname_lookup_.GetValue());
+}
+
+void IOThread::UpdateNegotiateEnablePort() {
+  globals_->http_auth_handler_factory->SetNegotiateEnablePort(
+      negotiate_enable_port_.GetValue());
+}
+
+void IOThread::CreateDefaultAuthHandlerFactory() {
   std::vector<std::string> supported_schemes = base::SplitString(
       auth_schemes_, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
-
-  scoped_ptr<net::HttpAuthHandlerRegistryFactory> registry_factory(
-      net::HttpAuthHandlerRegistryFactory::Create(
-          supported_schemes, globals_->url_security_manager.get(), resolver,
-          gssapi_library_name_, auth_android_negotiate_account_type_,
-          negotiate_disable_cname_lookup_, negotiate_enable_port_));
-  return registry_factory.release();
+  globals_->http_auth_handler_factory.reset(
+      net::HttpAuthHandlerRegistryFactory::Create(supported_schemes,
+                                                  globals_->host_resolver.get(),
+                                                  gssapi_library_name_));
+  UpdateSecurityManager();
+  UpdateAndroidAuthNegotiateAccount();
+  UpdateNegotiateDisableCnameLookup();
+  UpdateNegotiateEnablePort();
 }
 
 void IOThread::ClearHostCache() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   net::HostCache* host_cache = globals_->host_resolver->GetHostCache();
   if (host_cache)
     host_cache->clear();
 }
 
@@ skipping 613 matching lines @@
   globals->proxy_script_fetcher_url_request_job_factory = job_factory.Pass();
 
   context->set_job_factory(
       globals->proxy_script_fetcher_url_request_job_factory.get());
 
   // TODO(rtenneti): We should probably use HttpServerPropertiesManager for the
   // system URLRequestContext too. There's no reason this should be tied to a
   // profile.
   return context;
 }