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(content::RequestPeer* peer)
  15     : original_peer_(peer) {
  16 }
  17
  18 SecurityFilterPeer::~SecurityFilterPeer() {
  19 }
  20
  21 // static
  22 SecurityFilterPeer*
  23 SecurityFilterPeer::CreateSecurityFilterPeerForDeniedRequest(
  24     ResourceType::Type resource_type,
  25     content::RequestPeer* peer,
  26     int os_error) {
  27   // Create a filter for SSL and CERT errors.
  28   switch (os_error) {
  29     case net::ERR_SSL_PROTOCOL_ERROR:
  30     case net::ERR_CERT_COMMON_NAME_INVALID:
  31     case net::ERR_CERT_DATE_INVALID:
  32     case net::ERR_CERT_AUTHORITY_INVALID:
  33     case net::ERR_CERT_CONTAINS_ERRORS:
  34     case net::ERR_CERT_NO_REVOCATION_MECHANISM:
  35     case net::ERR_CERT_UNABLE_TO_CHECK_REVOCATION:
  36     case net::ERR_CERT_REVOKED:
  37     case net::ERR_CERT_INVALID:
  38     case net::ERR_CERT_WEAK_SIGNATURE_ALGORITHM:
  39     case net::ERR_CERT_WEAK_KEY:
  40     case net::ERR_CERT_NAME_CONSTRAINT_VIOLATION:
  41     case net::ERR_INSECURE_RESPONSE:
  42     case net::ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN:
  43       if (ResourceType::IsFrame(resource_type))
  44         return CreateSecurityFilterPeerForFrame(peer, os_error);
  45       // Any other content is entirely filtered-out.
  46       return new ReplaceContentPeer(peer, std::string(), std::string());
  47     default:
  48       // For other errors, we use our normal error handling.
  49       return NULL;
  50   }
  51 }
  52
  53 // static
  54 SecurityFilterPeer* SecurityFilterPeer::CreateSecurityFilterPeerForFrame(
  55     content::RequestPeer* peer,
  56     int os_error) {
  57   // TODO(jcampan): use a different message when getting a phishing/malware
  58   // error.
  59   std::string html = base::StringPrintf(
  60       "<html><meta charset='UTF-8'>"
  61       "<body style='background-color:#990000;color:white;'>"
  62       "%s</body></html>",
  63       l10n_util::GetStringUTF8(IDS_UNSAFE_FRAME_MESSAGE).c_str());
  64   return new ReplaceContentPeer(peer, "text/html", html);
  65 }
  66
  67 void SecurityFilterPeer::OnUploadProgress(uint64 position, uint64 size) {
  68   original_peer_->OnUploadProgress(position, size);
  69 }
  70
  71 bool SecurityFilterPeer::OnReceivedRedirect(
  72     const GURL& new_url,
  73     const GURL& new_first_party_for_cookies,
  74     const webkit_glue::ResourceResponseInfo& info) {
  75   NOTREACHED();
  76   return false;
  77 }
  78
  79 void SecurityFilterPeer::OnReceivedResponse(
  80     const webkit_glue::ResourceResponseInfo& info) {
  81   NOTREACHED();
  82 }
  83
  84 void SecurityFilterPeer::OnReceivedData(const char* data,
  85                                         int data_length,
  86                                         int encoded_data_length) {
  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(
 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(content::RequestPeer* peer,
 133                            const std::string& mime_type)
 134     : SecurityFilterPeer(peer), mime_type_(mime_type) {}
 135
 136 BufferedPeer::~BufferedPeer() {
 137 }
 138
 139 void BufferedPeer::OnReceivedResponse(
 140     const webkit_glue::ResourceResponseInfo& info) {
 141   ProcessResponseInfo(info, &response_info_, mime_type_);
 142 }
 143
 144 void BufferedPeer::OnReceivedData(const char* data,
 145                                   int data_length,
 146                                   int encoded_data_length) {
 147   data_.append(data, data_length);
 148 }
 149
 150 void BufferedPeer::OnCompletedRequest(int error_code,
 151                                       bool was_ignored_by_handler,
 152                                       bool stale_copy_in_cache,
 153                                       const std::string& security_info,
 154                                       const base::TimeTicks& completion_time,
 155                                       int64 total_transfer_size) {
 156   // Make sure we delete ourselves at the end of this call.
 157   scoped_ptr<BufferedPeer> this_deleter(this);
 158
 159   // Give sub-classes a chance at altering the data.
 160   if (error_code != net::OK || !DataReady()) {
 161     // Pretend we failed to load the resource.
 162     original_peer_->OnReceivedResponse(response_info_);
 163     original_peer_->OnCompletedRequest(net::ERR_ABORTED, false,
 164                                        stale_copy_in_cache,
 165                                        security_info, completion_time,
 166                                        total_transfer_size);
 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                                      stale_copy_in_cache, security_info,
 177                                      completion_time, total_transfer_size);
 178 }
 179
 180 ////////////////////////////////////////////////////////////////////////////////
 181 // ReplaceContentPeer
 182
 183 ReplaceContentPeer::ReplaceContentPeer(content::RequestPeer* peer,
 184                                        const std::string& mime_type,
 185                                        const std::string& data)
 186     : SecurityFilterPeer(peer),
 187       mime_type_(mime_type),
 188       data_(data) {}
 189
 190 ReplaceContentPeer::~ReplaceContentPeer() {
 191 }
 192
 193 void ReplaceContentPeer::OnReceivedResponse(
 194     const webkit_glue::ResourceResponseInfo& info) {
 195   // Ignore this, we'll serve some alternate content in OnCompletedRequest.
 196 }
 197
 198 void ReplaceContentPeer::OnReceivedData(const char* data,
 199                                         int data_length,
 200                                         int encoded_data_length) {
 201   // Ignore this, we'll serve some alternate content in OnCompletedRequest.
 202 }
 203
 204 void ReplaceContentPeer::OnCompletedRequest(
 205     int error_code,
 206     bool was_ignored_by_handler,
 207     bool stale_copy_in_cache,
 208     const std::string& security_info,
 209     const base::TimeTicks& completion_time,
 210     int64 total_transfer_size) {
 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                                      stale_copy_in_cache,
 223                                      security_info,
 224                                      completion_time,
 225                                      total_transfer_size);
 226
 227   // The request processing is complete, we must delete ourselves.
 228   delete this;
 229 }