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 <string>
   8
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/strings/stringprintf.h"
  11 #include "chrome/grit/generated_resources.h"
  12 #include "content/public/child/fixed_received_data.h"
  13 #include "net/base/net_errors.h"
  14 #include "net/http/http_response_headers.h"
  15 #include "ui/base/l10n/l10n_util.h"
  16
  17 SecurityFilterPeer::SecurityFilterPeer(content::RequestPeer* peer)
  18     : original_peer_(peer) {
  19 }
  20
  21 SecurityFilterPeer::~SecurityFilterPeer() {
  22 }
  23
  24 // static
  25 SecurityFilterPeer*
  26 SecurityFilterPeer::CreateSecurityFilterPeerForDeniedRequest(
  27     content::ResourceType resource_type,
  28     content::RequestPeer* 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_CERT_NAME_CONSTRAINT_VIOLATION:
  44     case net::ERR_INSECURE_RESPONSE:
  45     case net::ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN:
  46       if (content::IsResourceTypeFrame(resource_type))
  47         return CreateSecurityFilterPeerForFrame(peer, os_error);
  48       // Any other content is entirely filtered-out.
  49       return new ReplaceContentPeer(peer, std::string(), std::string());
  50     default:
  51       // For other errors, we use our normal error handling.
  52       return NULL;
  53   }
  54 }
  55
  56 // static
  57 SecurityFilterPeer* SecurityFilterPeer::CreateSecurityFilterPeerForFrame(
  58     content::RequestPeer* peer,
  59     int os_error) {
  60   // TODO(jcampan): use a different message when getting a phishing/malware
  61   // error.
  62   std::string html = base::StringPrintf(
  63       "<html><meta charset='UTF-8'>"
  64       "<body style='background-color:#990000;color:white;'>"
  65       "%s</body></html>",
  66       l10n_util::GetStringUTF8(IDS_UNSAFE_FRAME_MESSAGE).c_str());
  67   return new ReplaceContentPeer(peer, "text/html", html);
  68 }
  69
  70 void SecurityFilterPeer::OnUploadProgress(uint64 position, uint64 size) {
  71   original_peer_->OnUploadProgress(position, size);
  72 }
  73
  74 bool SecurityFilterPeer::OnReceivedRedirect(
  75     const net::RedirectInfo& redirect_info,
  76     const content::ResourceResponseInfo& info) {
  77   NOTREACHED();
  78   return false;
  79 }
  80
  81 void SecurityFilterPeer::OnReceivedResponse(
  82     const content::ResourceResponseInfo& info) {
  83   NOTREACHED();
  84 }
  85
  86 void SecurityFilterPeer::OnReceivedData(scoped_ptr<ReceivedData> data) {
  87   NOTREACHED();
  88 }
  89
  90 void SecurityFilterPeer::OnCompletedRequest(
  91     int error_code,
  92     bool was_ignored_by_handler,
  93     bool stale_copy_in_cache,
  94     const std::string& security_info,
  95     const base::TimeTicks& completion_time,
  96     int64 total_transfer_size) {
  97   NOTREACHED();
  98 }
  99
 100 // static
 101 void ProcessResponseInfo(const content::ResourceResponseInfo& info_in,
 102                          content::ResourceResponseInfo* info_out,
 103                          const std::string& mime_type) {
 104   DCHECK(info_out);
 105   *info_out = info_in;
 106   info_out->mime_type = mime_type;
 107   // Let's create our own HTTP headers.
 108   std::string raw_headers;
 109   raw_headers.append("HTTP/1.1 200 OK");
 110   raw_headers.push_back('\0');
 111   // Don't cache the data we are serving, it is not the real data for that URL
 112   // (if the filtered resource were to make it into the WebCore cache, then the
 113   // same URL loaded in a safe scenario would still return the filtered
 114   // resource).
 115   raw_headers.append("cache-control: no-cache");
 116   raw_headers.push_back('\0');
 117   if (!mime_type.empty()) {
 118     raw_headers.append("content-type: ");
 119     raw_headers.append(mime_type);
 120     raw_headers.push_back('\0');
 121   }
 122   raw_headers.push_back('\0');
 123   net::HttpResponseHeaders* new_headers =
 124       new net::HttpResponseHeaders(raw_headers);
 125   info_out->headers = new_headers;
 126 }
 127
 128 ////////////////////////////////////////////////////////////////////////////////
 129 // BufferedPeer
 130
 131 BufferedPeer::BufferedPeer(content::RequestPeer* peer,
 132                            const std::string& mime_type)
 133     : SecurityFilterPeer(peer), mime_type_(mime_type) {}
 134
 135 BufferedPeer::~BufferedPeer() {
 136 }
 137
 138 void BufferedPeer::OnReceivedResponse(
 139     const content::ResourceResponseInfo& info) {
 140   ProcessResponseInfo(info, &response_info_, mime_type_);
 141 }
 142
 143 void BufferedPeer::OnReceivedData(scoped_ptr<ReceivedData> data) {
 144   data_.append(data->payload(), data->length());
 145 }
 146
 147 void BufferedPeer::OnCompletedRequest(int error_code,
 148                                       bool was_ignored_by_handler,
 149                                       bool stale_copy_in_cache,
 150                                       const std::string& security_info,
 151                                       const base::TimeTicks& completion_time,
 152                                       int64 total_transfer_size) {
 153   // Make sure we delete ourselves at the end of this call.
 154   scoped_ptr<BufferedPeer> this_deleter(this);
 155
 156   // Give sub-classes a chance at altering the data.
 157   if (error_code != net::OK || !DataReady()) {
 158     // Pretend we failed to load the resource.
 159     original_peer_->OnReceivedResponse(response_info_);
 160     original_peer_->OnCompletedRequest(net::ERR_ABORTED, false,
 161                                        stale_copy_in_cache,
 162                                        security_info, completion_time,
 163                                        total_transfer_size);
 164     return;
 165   }
 166
 167   original_peer_->OnReceivedResponse(response_info_);
 168   if (!data_.empty())
 169     original_peer_->OnReceivedData(make_scoped_ptr(
 170         new content::FixedReceivedData(data_.data(), data_.size(), -1)));
 171   original_peer_->OnCompletedRequest(error_code, was_ignored_by_handler,
 172                                      stale_copy_in_cache, security_info,
 173                                      completion_time, total_transfer_size);
 174 }
 175
 176 ////////////////////////////////////////////////////////////////////////////////
 177 // ReplaceContentPeer
 178
 179 ReplaceContentPeer::ReplaceContentPeer(content::RequestPeer* peer,
 180                                        const std::string& mime_type,
 181                                        const std::string& data)
 182     : SecurityFilterPeer(peer),
 183       mime_type_(mime_type),
 184       data_(data) {}
 185
 186 ReplaceContentPeer::~ReplaceContentPeer() {
 187 }
 188
 189 void ReplaceContentPeer::OnReceivedResponse(
 190     const content::ResourceResponseInfo& info) {
 191   // Ignore this, we'll serve some alternate content in OnCompletedRequest.
 192 }
 193
 194 void ReplaceContentPeer::OnReceivedData(scoped_ptr<ReceivedData> data) {
 195   // Ignore this, we'll serve some alternate content in OnCompletedRequest.
 196 }
 197
 198 void ReplaceContentPeer::OnCompletedRequest(
 199     int error_code,
 200     bool was_ignored_by_handler,
 201     bool stale_copy_in_cache,
 202     const std::string& security_info,
 203     const base::TimeTicks& completion_time,
 204     int64 total_transfer_size) {
 205   content::ResourceResponseInfo info;
 206   ProcessResponseInfo(info, &info, mime_type_);
 207   info.security_info = security_info;
 208   info.content_length = static_cast<int>(data_.size());
 209   original_peer_->OnReceivedResponse(info);
 210   if (!data_.empty())
 211     original_peer_->OnReceivedData(make_scoped_ptr(
 212         new content::FixedReceivedData(data_.data(), data_.size(), -1)));
 213   original_peer_->OnCompletedRequest(net::OK,
 214                                      false,
 215                                      stale_copy_in_cache,
 216                                      security_info,
 217                                      completion_time,
 218                                      total_transfer_size);
 219
 220   // The request processing is complete, we must delete ourselves.
 221   delete this;
 222 }