chrome/renderer/security_filter_peer.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/renderer/security_filter_peer.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "base/stringprintf.h"
   9 #include "grit/generated_resources.h"
  10 #include "net/base/net_errors.h"
  11 #include "net/http/http_response_headers.h"
  12 #include "ui/base/l10n/l10n_util.h"
  13
  14 SecurityFilterPeer::SecurityFilterPeer(
  15     webkit_glue::ResourceLoaderBridge* resource_loader_bridge,
  16     webkit_glue::ResourceLoaderBridge::Peer* peer)
  17     : original_peer_(peer),
  18       resource_loader_bridge_(resource_loader_bridge) {
  19 }
  20
  21 SecurityFilterPeer::~SecurityFilterPeer() {
  22 }
  23
  24 // static
  25 SecurityFilterPeer*
  26     SecurityFilterPeer::CreateSecurityFilterPeerForDeniedRequest(
  27     ResourceType::Type resource_type,
  28     webkit_glue::ResourceLoaderBridge::Peer* peer,
  29     int os_error) {
  30   // Create a filter for SSL and CERT errors.
  31   switch (os_error) {
  32     case net::ERR_SSL_PROTOCOL_ERROR:
  33     case net::ERR_CERT_COMMON_NAME_INVALID:
  34     case net::ERR_CERT_DATE_INVALID:
  35     case net::ERR_CERT_AUTHORITY_INVALID:
  36     case net::ERR_CERT_CONTAINS_ERRORS:
  37     case net::ERR_CERT_NO_REVOCATION_MECHANISM:
  38     case net::ERR_CERT_UNABLE_TO_CHECK_REVOCATION:
  39     case net::ERR_CERT_REVOKED:
  40     case net::ERR_CERT_INVALID:
  41     case net::ERR_CERT_WEAK_SIGNATURE_ALGORITHM:
  42     case net::ERR_CERT_WEAK_KEY:
  43     case net::ERR_INSECURE_RESPONSE:
  44     case net::ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN:
  45       if (ResourceType::IsFrame(resource_type))
  46         return CreateSecurityFilterPeerForFrame(peer, os_error);
  47       // Any other content is entirely filtered-out.
  48       return new ReplaceContentPeer(NULL, peer, std::string(), std::string());
  49     default:
  50       // For other errors, we use our normal error handling.
  51       return NULL;
  52   }
  53 }
  54
  55 // static
  56 SecurityFilterPeer* SecurityFilterPeer::CreateSecurityFilterPeerForFrame(
  57     webkit_glue::ResourceLoaderBridge::Peer* peer, int os_error) {
  58   // TODO(jcampan): use a different message when getting a phishing/malware
  59   // error.
  60   std::string html = base::StringPrintf(
  61       "<html><meta charset='UTF-8'>"
  62       "<body style='background-color:#990000;color:white;'>"
  63       "%s</body></html>",
  64       l10n_util::GetStringUTF8(IDS_UNSAFE_FRAME_MESSAGE).c_str());
  65   return new ReplaceContentPeer(NULL, peer, "text/html", html);
  66 }
  67
  68 void SecurityFilterPeer::OnUploadProgress(uint64 position, uint64 size) {
  69   original_peer_->OnUploadProgress(position, size);
  70 }
  71
  72 bool SecurityFilterPeer::OnReceivedRedirect(
  73     const GURL& new_url,
  74     const webkit_glue::ResourceResponseInfo& info,
  75     bool* has_new_first_party_for_cookies,
  76     GURL* new_first_party_for_cookies) {
  77   NOTREACHED();
  78   return false;
  79 }
  80
  81 void SecurityFilterPeer::OnReceivedResponse(
  82     const webkit_glue::ResourceResponseInfo& info) {
  83   NOTREACHED();
  84 }
  85
  86 void SecurityFilterPeer::OnReceivedData(const char* data,
  87                                         int data_length,
  88                                         int encoded_data_length) {
  89   NOTREACHED();
  90 }
  91
  92 void SecurityFilterPeer::OnCompletedRequest(
  93     int error_code,
  94     bool was_ignored_by_handler,
  95     const std::string& security_info,
  96     const base::TimeTicks& completion_time) {
  97   NOTREACHED();
  98 }
  99
 100 // static
 101 void ProcessResponseInfo(
 102     const webkit_glue::ResourceResponseInfo& info_in,
 103     webkit_glue::ResourceResponseInfo* info_out,
 104     const std::string& mime_type) {
 105   DCHECK(info_out);
 106   *info_out = info_in;
 107   info_out->mime_type = mime_type;
 108   // Let's create our own HTTP headers.
 109   std::string raw_headers;
 110   raw_headers.append("HTTP/1.1 200 OK");
 111   raw_headers.push_back('\0');
 112   // Don't cache the data we are serving, it is not the real data for that URL
 113   // (if the filtered resource were to make it into the WebCore cache, then the
 114   // same URL loaded in a safe scenario would still return the filtered
 115   // resource).
 116   raw_headers.append("cache-control: no-cache");
 117   raw_headers.push_back('\0');
 118   if (!mime_type.empty()) {
 119     raw_headers.append("content-type: ");
 120     raw_headers.append(mime_type);
 121     raw_headers.push_back('\0');
 122   }
 123   raw_headers.push_back('\0');
 124   net::HttpResponseHeaders* new_headers =
 125       new net::HttpResponseHeaders(raw_headers);
 126   info_out->headers = new_headers;
 127 }
 128
 129 ////////////////////////////////////////////////////////////////////////////////
 130 // BufferedPeer
 131
 132 BufferedPeer::BufferedPeer(
 133     webkit_glue::ResourceLoaderBridge* resource_loader_bridge,
 134     webkit_glue::ResourceLoaderBridge::Peer* peer,
 135     const std::string& mime_type)
 136     : SecurityFilterPeer(resource_loader_bridge, peer),
 137       mime_type_(mime_type) {
 138 }
 139
 140 BufferedPeer::~BufferedPeer() {
 141 }
 142
 143 void BufferedPeer::OnReceivedResponse(
 144     const webkit_glue::ResourceResponseInfo& info) {
 145   ProcessResponseInfo(info, &response_info_, mime_type_);
 146 }
 147
 148 void BufferedPeer::OnReceivedData(const char* data,
 149                                   int data_length,
 150                                   int encoded_data_length) {
 151   data_.append(data, data_length);
 152 }
 153
 154 void BufferedPeer::OnCompletedRequest(int error_code,
 155                                       bool was_ignored_by_handler,
 156                                       const std::string& security_info,
 157                                       const base::TimeTicks& completion_time) {
 158   // Make sure we delete ourselves at the end of this call.
 159   scoped_ptr<BufferedPeer> this_deleter(this);
 160
 161   // Give sub-classes a chance at altering the data.
 162   if (error_code != net::OK || !DataReady()) {
 163     // Pretend we failed to load the resource.
 164     original_peer_->OnReceivedResponse(response_info_);
 165     original_peer_->OnCompletedRequest(net::ERR_ABORTED, false, security_info,
 166                                        completion_time);
 167     return;
 168   }
 169
 170   original_peer_->OnReceivedResponse(response_info_);
 171   if (!data_.empty())
 172     original_peer_->OnReceivedData(data_.data(),
 173                                    static_cast<int>(data_.size()),
 174                                    -1);
 175   original_peer_->OnCompletedRequest(error_code, was_ignored_by_handler,
 176                                      security_info, completion_time);
 177 }
 178
 179 ////////////////////////////////////////////////////////////////////////////////
 180 // ReplaceContentPeer
 181
 182 ReplaceContentPeer::ReplaceContentPeer(
 183     webkit_glue::ResourceLoaderBridge* resource_loader_bridge,
 184     webkit_glue::ResourceLoaderBridge::Peer* peer,
 185     const std::string& mime_type,
 186     const std::string& data)
 187     : SecurityFilterPeer(resource_loader_bridge, peer),
 188       mime_type_(mime_type),
 189       data_(data) {
 190 }
 191
 192 ReplaceContentPeer::~ReplaceContentPeer() {
 193 }
 194
 195 void ReplaceContentPeer::OnReceivedResponse(
 196     const webkit_glue::ResourceResponseInfo& info) {
 197   // Ignore this, we'll serve some alternate content in OnCompletedRequest.
 198 }
 199
 200 void ReplaceContentPeer::OnReceivedData(const char* data,
 201                                         int data_length,
 202                                         int encoded_data_length) {
 203   // Ignore this, we'll serve some alternate content in OnCompletedRequest.
 204 }
 205
 206 void ReplaceContentPeer::OnCompletedRequest(
 207     int error_code,
 208     bool was_ignored_by_handler,
 209     const std::string& security_info,
 210     const base::TimeTicks& completion_time) {
 211   webkit_glue::ResourceResponseInfo info;
 212   ProcessResponseInfo(info, &info, mime_type_);
 213   info.security_info = security_info;
 214   info.content_length = static_cast<int>(data_.size());
 215   original_peer_->OnReceivedResponse(info);
 216   if (!data_.empty())
 217     original_peer_->OnReceivedData(data_.data(),
 218                                    static_cast<int>(data_.size()),
 219                                    -1);
 220   original_peer_->OnCompletedRequest(net::OK,
 221                                      false,
 222                                      security_info,
 223                                      completion_time);
 224
 225   // The request processing is complete, we must delete ourselves.
 226   delete this;
 227 }