chrome/browser/safe_browsing/ui_manager.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/safe_browsing/ui_manager.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/callback.h"
  10 #include "base/debug/leak_tracker.h"
  11 #include "base/stl_util.h"
  12 #include "base/strings/string_util.h"
  13 #include "base/threading/thread.h"
  14 #include "base/threading/thread_restrictions.h"
  15 #include "chrome/browser/browser_process.h"
  16 #include "chrome/browser/safe_browsing/malware_details.h"
  17 #include "chrome/browser/safe_browsing/metadata.pb.h"
  18 #include "chrome/browser/safe_browsing/ping_manager.h"
  19 #include "chrome/browser/safe_browsing/safe_browsing_blocking_page.h"
  20 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
  21 #include "chrome/browser/tab_contents/tab_util.h"
  22 #include "chrome/common/url_constants.h"
  23 #include "components/metrics/metrics_service.h"
  24 #include "content/public/browser/browser_thread.h"
  25 #include "content/public/browser/navigation_entry.h"
  26 #include "content/public/browser/notification_service.h"
  27 #include "content/public/browser/web_contents.h"
  28 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
  29 #include "net/url_request/url_request_context.h"
  30 #include "net/url_request/url_request_context_getter.h"
  31
  32 using content::BrowserThread;
  33 using content::NavigationEntry;
  34 using content::WebContents;
  35
  36 struct SafeBrowsingUIManager::WhiteListedEntry {
  37   int render_process_host_id;
  38   int render_view_id;
  39   std::string domain;
  40   SBThreatType threat_type;
  41 };
  42
  43 SafeBrowsingUIManager::UnsafeResource::UnsafeResource()
  44     : is_subresource(false),
  45       threat_type(SB_THREAT_TYPE_SAFE),
  46       render_process_host_id(-1),
  47       render_view_id(-1) {
  48 }
  49
  50 SafeBrowsingUIManager::UnsafeResource::~UnsafeResource() { }
  51
  52 SafeBrowsingUIManager::SafeBrowsingUIManager(
  53     const scoped_refptr<SafeBrowsingService>& service)
  54     : sb_service_(service) {
  55 }
  56
  57 SafeBrowsingUIManager::~SafeBrowsingUIManager() { }
  58
  59 void SafeBrowsingUIManager::StopOnIOThread(bool shutdown) {
  60   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  61
  62   if (shutdown)
  63     sb_service_ = NULL;
  64 }
  65
  66 void SafeBrowsingUIManager::LogPauseDelay(base::TimeDelta time) {
  67   UMA_HISTOGRAM_LONG_TIMES("SB2.Delay", time);
  68 }
  69
  70 // Only report SafeBrowsing related stats when UMA is enabled. User must also
  71 // ensure that safe browsing is enabled from the calling profile.
  72 bool SafeBrowsingUIManager::CanReportStats() const {
  73   const metrics::MetricsService* metrics = g_browser_process->metrics_service();
  74   return metrics && metrics->reporting_active();
  75 }
  76
  77 void SafeBrowsingUIManager::OnBlockingPageDone(
  78     const std::vector<UnsafeResource>& resources,
  79     bool proceed) {
  80   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  81   for (std::vector<UnsafeResource>::const_iterator iter = resources.begin();
  82        iter != resources.end(); ++iter) {
  83     const UnsafeResource& resource = *iter;
  84     if (!resource.callback.is_null())
  85       resource.callback.Run(proceed);
  86
  87     if (proceed) {
  88       BrowserThread::PostTask(
  89           BrowserThread::UI,
  90           FROM_HERE,
  91           base::Bind(&SafeBrowsingUIManager::UpdateWhitelist, this, resource));
  92     }
  93   }
  94 }
  95
  96 void SafeBrowsingUIManager::DisplayBlockingPage(
  97     const UnsafeResource& resource) {
  98   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  99   if (resource.is_subresource && !resource.is_subframe) {
 100     // Sites tagged as serving Unwanted Software should only show a warning for
 101     // main-frame or sub-frame resource. Similar warning restrictions should be
 102     // applied to malware sites tagged as "landing sites" (see "Types of
 103     // Malware sites" under
 104     // https://developers.google.com/safe-browsing/developers_guide_v3#UserWarnings).
 105     safe_browsing::MalwarePatternType proto;
 106     if (resource.threat_type == SB_THREAT_TYPE_URL_UNWANTED ||
 107         (resource.threat_type == SB_THREAT_TYPE_URL_MALWARE &&
 108          !resource.threat_metadata.empty() &&
 109          proto.ParseFromString(resource.threat_metadata) &&
 110          proto.pattern_type() == safe_browsing::MalwarePatternType::LANDING)) {
 111       if (!resource.callback.is_null()) {
 112         BrowserThread::PostTask(
 113             BrowserThread::IO, FROM_HERE, base::Bind(resource.callback, true));
 114       }
 115       return;
 116     }
 117   }
 118
 119   // For M40, the UwS warning may be gated to not show any UI.
 120   const bool ping_only = resource.threat_type == SB_THREAT_TYPE_URL_UNWANTED
 121     && safe_browsing_util::GetUnwantedTrialGroup() < safe_browsing_util::UWS_ON;
 122
 123   // Indicate to interested observers that the resource in question matched the
 124   // SB filters, unless the UwS interstitial is in ping-only mode.
 125   if (resource.threat_type != SB_THREAT_TYPE_SAFE && !ping_only) {
 126     FOR_EACH_OBSERVER(Observer, observer_list_, OnSafeBrowsingMatch(resource));
 127   }
 128
 129   // Check if the user has already ignored our warning for this render_view
 130   // and domain.
 131   if (IsWhitelisted(resource)) {
 132     if (!resource.callback.is_null()) {
 133       BrowserThread::PostTask(
 134           BrowserThread::IO, FROM_HERE, base::Bind(resource.callback, true));
 135     }
 136     return;
 137   }
 138
 139   // The tab might have been closed.
 140   WebContents* web_contents =
 141       tab_util::GetWebContentsByID(resource.render_process_host_id,
 142                                    resource.render_view_id);
 143
 144   if (!web_contents) {
 145     // The tab is gone and we did not have a chance at showing the interstitial.
 146     // Just act as if "Don't Proceed" were chosen.
 147     std::vector<UnsafeResource> resources;
 148     resources.push_back(resource);
 149     BrowserThread::PostTask(
 150       BrowserThread::IO, FROM_HERE,
 151       base::Bind(&SafeBrowsingUIManager::OnBlockingPageDone,
 152                  this, resources, false));
 153     return;
 154   }
 155
 156   if (resource.threat_type != SB_THREAT_TYPE_SAFE &&
 157       CanReportStats()) {
 158     GURL page_url = web_contents->GetURL();
 159     GURL referrer_url;
 160     NavigationEntry* entry = web_contents->GetController().GetActiveEntry();
 161     if (entry)
 162       referrer_url = entry->GetReferrer().url;
 163
 164     // When the malicious url is on the main frame, and resource.original_url
 165     // is not the same as the resource.url, that means we have a redirect from
 166     // resource.original_url to resource.url.
 167     // Also, at this point, page_url points to the _previous_ page that we
 168     // were on. We replace page_url with resource.original_url and referrer
 169     // with page_url.
 170     if (!resource.is_subresource &&
 171         !resource.original_url.is_empty() &&
 172         resource.original_url != resource.url) {
 173       referrer_url = page_url;
 174       page_url = resource.original_url;
 175     }
 176     ReportSafeBrowsingHit(resource.url, page_url, referrer_url,
 177                           resource.is_subresource, resource.threat_type,
 178                           std::string() /* post_data */);
 179   }
 180
 181   // If UwS interstitials are turned off, return here before showing UI.
 182   if (ping_only) {
 183     if (!resource.callback.is_null()) {
 184       BrowserThread::PostTask(
 185           BrowserThread::IO, FROM_HERE, base::Bind(resource.callback, true));
 186     }
 187     return;
 188   }
 189
 190   if (resource.threat_type != SB_THREAT_TYPE_SAFE) {
 191     FOR_EACH_OBSERVER(Observer, observer_list_, OnSafeBrowsingHit(resource));
 192   }
 193   SafeBrowsingBlockingPage::ShowBlockingPage(this, resource);
 194 }
 195
 196 // A safebrowsing hit is sent after a blocking page for malware/phishing
 197 // or after the warning dialog for download urls, only for UMA users.
 198 void SafeBrowsingUIManager::ReportSafeBrowsingHit(
 199     const GURL& malicious_url,
 200     const GURL& page_url,
 201     const GURL& referrer_url,
 202     bool is_subresource,
 203     SBThreatType threat_type,
 204     const std::string& post_data) {
 205   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 206   if (!CanReportStats())
 207     return;
 208
 209   BrowserThread::PostTask(
 210       BrowserThread::IO, FROM_HERE,
 211       base::Bind(&SafeBrowsingUIManager::ReportSafeBrowsingHitOnIOThread, this,
 212                  malicious_url, page_url, referrer_url, is_subresource,
 213                  threat_type, post_data));
 214 }
 215
 216 void SafeBrowsingUIManager::AddObserver(Observer* observer) {
 217   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 218   observer_list_.AddObserver(observer);
 219 }
 220
 221 void SafeBrowsingUIManager::RemoveObserver(Observer* observer) {
 222   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 223   observer_list_.RemoveObserver(observer);
 224 }
 225
 226 void SafeBrowsingUIManager::ReportSafeBrowsingHitOnIOThread(
 227     const GURL& malicious_url,
 228     const GURL& page_url,
 229     const GURL& referrer_url,
 230     bool is_subresource,
 231     SBThreatType threat_type,
 232     const std::string& post_data) {
 233   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 234
 235   // The service may delete the ping manager (i.e. when user disabling service,
 236   // etc). This happens on the IO thread.
 237   if (sb_service_.get() == NULL || sb_service_->ping_manager() == NULL)
 238     return;
 239
 240   DVLOG(1) << "ReportSafeBrowsingHit: " << malicious_url << " " << page_url
 241            << " " << referrer_url << " " << is_subresource << " "
 242            << threat_type;
 243   sb_service_->ping_manager()->ReportSafeBrowsingHit(
 244       malicious_url, page_url,
 245       referrer_url, is_subresource,
 246       threat_type, post_data);
 247 }
 248
 249 // If the user had opted-in to send MalwareDetails, this gets called
 250 // when the report is ready.
 251 void SafeBrowsingUIManager::SendSerializedMalwareDetails(
 252     const std::string& serialized) {
 253   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 254
 255   // The service may delete the ping manager (i.e. when user disabling service,
 256   // etc). This happens on the IO thread.
 257   if (sb_service_.get() == NULL || sb_service_->ping_manager() == NULL)
 258     return;
 259
 260   if (!serialized.empty()) {
 261     DVLOG(1) << "Sending serialized malware details.";
 262     sb_service_->ping_manager()->ReportMalwareDetails(serialized);
 263   }
 264 }
 265
 266 void SafeBrowsingUIManager::UpdateWhitelist(const UnsafeResource& resource) {
 267   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 268   // Whitelist this domain and warning type for the given tab.
 269   WhiteListedEntry entry;
 270   entry.render_process_host_id = resource.render_process_host_id;
 271   entry.render_view_id = resource.render_view_id;
 272   entry.domain = net::registry_controlled_domains::GetDomainAndRegistry(
 273       resource.url,
 274       net::registry_controlled_domains::EXCLUDE_PRIVATE_REGISTRIES);
 275   entry.threat_type = resource.threat_type;
 276   white_listed_entries_.push_back(entry);
 277 }
 278
 279 bool SafeBrowsingUIManager::IsWhitelisted(const UnsafeResource& resource) {
 280   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 281   // Check if the user has already ignored our warning for this render_view
 282   // and domain.
 283   for (size_t i = 0; i < white_listed_entries_.size(); ++i) {
 284     const WhiteListedEntry& entry = white_listed_entries_[i];
 285     if (entry.render_process_host_id == resource.render_process_host_id &&
 286         entry.render_view_id == resource.render_view_id &&
 287         // Threat type must be the same or they can either be client-side
 288         // phishing/malware URL or a SafeBrowsing phishing/malware URL.
 289         // If we show one type of phishing/malware warning we don't want to show
 290         // a second phishing/malware warning.
 291         (entry.threat_type == resource.threat_type ||
 292          (entry.threat_type == SB_THREAT_TYPE_URL_PHISHING &&
 293           resource.threat_type == SB_THREAT_TYPE_CLIENT_SIDE_PHISHING_URL) ||
 294          (entry.threat_type == SB_THREAT_TYPE_CLIENT_SIDE_PHISHING_URL &&
 295           resource.threat_type == SB_THREAT_TYPE_URL_PHISHING) ||
 296          (entry.threat_type == SB_THREAT_TYPE_URL_MALWARE &&
 297           resource.threat_type == SB_THREAT_TYPE_CLIENT_SIDE_MALWARE_URL) ||
 298          (entry.threat_type == SB_THREAT_TYPE_CLIENT_SIDE_MALWARE_URL &&
 299           resource.threat_type == SB_THREAT_TYPE_URL_MALWARE))) {
 300       return entry.domain ==
 301           net::registry_controlled_domains::GetDomainAndRegistry(
 302               resource.url,
 303               net::registry_controlled_domains::EXCLUDE_PRIVATE_REGISTRIES);
 304     }
 305   }
 306   return false;
 307 }
 308