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/strings/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_CERT_NAME_CONSTRAINT_VIOLATION:
  44     case net::ERR_INSECURE_RESPONSE:
  45     case net::ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN:
  46       if (ResourceType::IsFrame(resource_type))
  47         return CreateSecurityFilterPeerForFrame(peer, os_error);
  48       // Any other content is entirely filtered-out.
  49       return new ReplaceContentPeer(NULL, 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     webkit_glue::ResourceLoaderBridge::Peer* peer, int os_error) {
  59   // TODO(jcampan): use a different message when getting a phishing/malware
  60   // error.
  61   std::string html = base::StringPrintf(
  62       "<html><meta charset='UTF-8'>"
  63       "<body style='background-color:#990000;color:white;'>"
  64       "%s</body></html>",
  65       l10n_util::GetStringUTF8(IDS_UNSAFE_FRAME_MESSAGE).c_str());
  66   return new ReplaceContentPeer(NULL, peer, "text/html", html);
  67 }
  68
  69 void SecurityFilterPeer::OnUploadProgress(uint64 position, uint64 size) {
  70   original_peer_->OnUploadProgress(position, size);
  71 }
  72
  73 bool SecurityFilterPeer::OnReceivedRedirect(
  74     const GURL& new_url,
  75     const webkit_glue::ResourceResponseInfo& info,
  76     bool* has_new_first_party_for_cookies,
  77     GURL* new_first_party_for_cookies) {
  78   NOTREACHED();
  79   return false;
  80 }
  81
  82 void SecurityFilterPeer::OnReceivedResponse(
  83     const webkit_glue::ResourceResponseInfo& info) {
  84   NOTREACHED();
  85 }
  86
  87 void SecurityFilterPeer::OnReceivedData(const char* data,
  88                                         int data_length,
  89                                         int encoded_data_length) {
  90   NOTREACHED();
  91 }
  92
  93 void SecurityFilterPeer::OnCompletedRequest(
  94     int error_code,
  95     bool was_ignored_by_handler,
  96     const std::string& security_info,
  97     const base::TimeTicks& completion_time) {
  98   NOTREACHED();
  99 }
 100
 101 // static
 102 void ProcessResponseInfo(
 103     const webkit_glue::ResourceResponseInfo& info_in,
 104     webkit_glue::ResourceResponseInfo* info_out,
 105     const std::string& mime_type) {
 106   DCHECK(info_out);
 107   *info_out = info_in;
 108   info_out->mime_type = mime_type;
 109   // Let's create our own HTTP headers.
 110   std::string raw_headers;
 111   raw_headers.append("HTTP/1.1 200 OK");
 112   raw_headers.push_back('\0');
 113   // Don't cache the data we are serving, it is not the real data for that URL
 114   // (if the filtered resource were to make it into the WebCore cache, then the
 115   // same URL loaded in a safe scenario would still return the filtered
 116   // resource).
 117   raw_headers.append("cache-control: no-cache");
 118   raw_headers.push_back('\0');
 119   if (!mime_type.empty()) {
 120     raw_headers.append("content-type: ");
 121     raw_headers.append(mime_type);
 122     raw_headers.push_back('\0');
 123   }
 124   raw_headers.push_back('\0');
 125   net::HttpResponseHeaders* new_headers =
 126       new net::HttpResponseHeaders(raw_headers);
 127   info_out->headers = new_headers;
 128 }
 129
 130 ////////////////////////////////////////////////////////////////////////////////
 131 // BufferedPeer
 132
 133 BufferedPeer::BufferedPeer(
 134     webkit_glue::ResourceLoaderBridge* resource_loader_bridge,
 135     webkit_glue::ResourceLoaderBridge::Peer* peer,
 136     const std::string& mime_type)
 137     : SecurityFilterPeer(resource_loader_bridge, peer),
 138       mime_type_(mime_type) {
 139 }
 140
 141 BufferedPeer::~BufferedPeer() {
 142 }
 143
 144 void BufferedPeer::OnReceivedResponse(
 145     const webkit_glue::ResourceResponseInfo& info) {
 146   ProcessResponseInfo(info, &response_info_, mime_type_);
 147 }
 148
 149 void BufferedPeer::OnReceivedData(const char* data,
 150                                   int data_length,
 151                                   int encoded_data_length) {
 152   data_.append(data, data_length);
 153 }
 154
 155 void BufferedPeer::OnCompletedRequest(int error_code,
 156                                       bool was_ignored_by_handler,
 157                                       const std::string& security_info,
 158                                       const base::TimeTicks& completion_time) {
 159   // Make sure we delete ourselves at the end of this call.
 160   scoped_ptr<BufferedPeer> this_deleter(this);
 161
 162   // Give sub-classes a chance at altering the data.
 163   if (error_code != net::OK || !DataReady()) {
 164     // Pretend we failed to load the resource.
 165     original_peer_->OnReceivedResponse(response_info_);
 166     original_peer_->OnCompletedRequest(net::ERR_ABORTED, false, security_info,
 167                                        completion_time);
 168     return;
 169   }
 170
 171   original_peer_->OnReceivedResponse(response_info_);
 172   if (!data_.empty())
 173     original_peer_->OnReceivedData(data_.data(),
 174                                    static_cast<int>(data_.size()),
 175                                    -1);
 176   original_peer_->OnCompletedRequest(error_code, was_ignored_by_handler,
 177                                      security_info, completion_time);
 178 }
 179
 180 ////////////////////////////////////////////////////////////////////////////////
 181 // ReplaceContentPeer
 182
 183 ReplaceContentPeer::ReplaceContentPeer(
 184     webkit_glue::ResourceLoaderBridge* resource_loader_bridge,
 185     webkit_glue::ResourceLoaderBridge::Peer* peer,
 186     const std::string& mime_type,
 187     const std::string& data)
 188     : SecurityFilterPeer(resource_loader_bridge, peer),
 189       mime_type_(mime_type),
 190       data_(data) {
 191 }
 192
 193 ReplaceContentPeer::~ReplaceContentPeer() {
 194 }
 195
 196 void ReplaceContentPeer::OnReceivedResponse(
 197     const webkit_glue::ResourceResponseInfo& info) {
 198   // Ignore this, we'll serve some alternate content in OnCompletedRequest.
 199 }
 200
 201 void ReplaceContentPeer::OnReceivedData(const char* data,
 202                                         int data_length,
 203                                         int encoded_data_length) {
 204   // Ignore this, we'll serve some alternate content in OnCompletedRequest.
 205 }
 206
 207 void ReplaceContentPeer::OnCompletedRequest(
 208     int error_code,
 209     bool was_ignored_by_handler,
 210     const std::string& security_info,
 211     const base::TimeTicks& completion_time) {
 212   webkit_glue::ResourceResponseInfo info;
 213   ProcessResponseInfo(info, &info, mime_type_);
 214   info.security_info = security_info;
 215   info.content_length = static_cast<int>(data_.size());
 216   original_peer_->OnReceivedResponse(info);
 217   if (!data_.empty())
 218     original_peer_->OnReceivedData(data_.data(),
 219                                    static_cast<int>(data_.size()),
 220                                    -1);
 221   original_peer_->OnCompletedRequest(net::OK,
 222                                      false,
 223                                      security_info,
 224                                      completion_time);
 225
 226   // The request processing is complete, we must delete ourselves.
 227   delete this;
 228 }