src/chrome/browser/net/chrome_fraudulent_certificate_reporter.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/net/chrome_fraudulent_certificate_reporter.h"
   6
   7 #include <set>
   8
   9 #include "base/base64.h"
  10 #include "base/logging.h"
  11 #include "base/stl_util.h"
  12 #include "base/time/time.h"
  13 #include "chrome/browser/net/cert_logger.pb.h"
  14 #include "net/base/load_flags.h"
  15 #include "net/base/request_priority.h"
  16 #include "net/base/upload_bytes_element_reader.h"
  17 #include "net/base/upload_data_stream.h"
  18 #include "net/cert/x509_certificate.h"
  19 #include "net/ssl/ssl_info.h"
  20 #include "net/url_request/url_request_context.h"
  21
  22 namespace chrome_browser_net {
  23
  24 // TODO(palmer): Switch to HTTPS when the error handling delegate is more
  25 // sophisticated. Ultimately we plan to attempt the report on many transports.
  26 static const char kFraudulentCertificateUploadEndpoint[] =
  27     "http://clients3.google.com/log_cert_error";
  28
  29 ChromeFraudulentCertificateReporter::ChromeFraudulentCertificateReporter(
  30     net::URLRequestContext* request_context)
  31     : request_context_(request_context),
  32       upload_url_(kFraudulentCertificateUploadEndpoint) {
  33 }
  34
  35 ChromeFraudulentCertificateReporter::~ChromeFraudulentCertificateReporter() {
  36   STLDeleteElements(&inflight_requests_);
  37 }
  38
  39 static std::string BuildReport(const std::string& hostname,
  40                                const net::SSLInfo& ssl_info) {
  41   CertLoggerRequest request;
  42   base::Time now = base::Time::Now();
  43   request.set_time_usec(now.ToInternalValue());
  44   request.set_hostname(hostname);
  45
  46   std::vector<std::string> pem_encoded_chain;
  47   if (!ssl_info.cert->GetPEMEncodedChain(&pem_encoded_chain)) {
  48     LOG(ERROR) << "Could not get PEM encoded chain.";
  49   }
  50   std::string* cert_chain = request.mutable_cert_chain();
  51   for (size_t i = 0; i < pem_encoded_chain.size(); ++i)
  52     *cert_chain += pem_encoded_chain[i];
  53
  54   request.add_pin(ssl_info.pinning_failure_log);
  55
  56   std::string out;
  57   request.SerializeToString(&out);
  58   return out;
  59 }
  60
  61 scoped_ptr<net::URLRequest>
  62 ChromeFraudulentCertificateReporter::CreateURLRequest(
  63     net::URLRequestContext* context) {
  64   scoped_ptr<net::URLRequest> request =
  65       context->CreateRequest(upload_url_, net::DEFAULT_PRIORITY, this, NULL);
  66   request->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
  67                         net::LOAD_DO_NOT_SAVE_COOKIES);
  68   return request.Pass();
  69 }
  70
  71 void ChromeFraudulentCertificateReporter::SendReport(
  72     const std::string& hostname,
  73     const net::SSLInfo& ssl_info,
  74     bool sni_available) {
  75   // We do silent/automatic reporting ONLY for Google properties. For other
  76   // domains (when we start supporting that), we will ask for user permission.
  77   if (!net::TransportSecurityState::IsGooglePinnedProperty(hostname,
  78                                                            sni_available)) {
  79     return;
  80   }
  81
  82   std::string report = BuildReport(hostname, ssl_info);
  83
  84   scoped_ptr<net::URLRequest> url_request = CreateURLRequest(request_context_);
  85   url_request->set_method("POST");
  86
  87   scoped_ptr<net::UploadElementReader> reader(
  88       net::UploadOwnedBytesElementReader::CreateWithString(report));
  89   url_request->set_upload(make_scoped_ptr(
  90       net::UploadDataStream::CreateWithReader(reader.Pass(), 0)));
  91
  92   net::HttpRequestHeaders headers;
  93   headers.SetHeader(net::HttpRequestHeaders::kContentType,
  94                     "x-application/chrome-fraudulent-cert-report");
  95   url_request->SetExtraRequestHeaders(headers);
  96
  97   net::URLRequest* raw_url_request = url_request.get();
  98   inflight_requests_.insert(url_request.release());
  99   raw_url_request->Start();
 100 }
 101
 102 void ChromeFraudulentCertificateReporter::RequestComplete(
 103     net::URLRequest* request) {
 104   std::set<net::URLRequest*>::iterator i = inflight_requests_.find(request);
 105   DCHECK(i != inflight_requests_.end());
 106   scoped_ptr<net::URLRequest> url_request(*i);
 107   inflight_requests_.erase(i);
 108 }
 109
 110 // TODO(palmer): Currently, the upload is fire-and-forget but soon we will
 111 // try to recover by retrying, and trying different endpoints, and
 112 // appealing to the user.
 113 void ChromeFraudulentCertificateReporter::OnResponseStarted(
 114     net::URLRequest* request) {
 115   const net::URLRequestStatus& status(request->status());
 116   if (!status.is_success()) {
 117     LOG(WARNING) << "Certificate upload failed"
 118                  << " status:" << status.status()
 119                  << " error:" << status.error();
 120   } else if (request->GetResponseCode() != 200) {
 121     LOG(WARNING) << "Certificate upload HTTP status: "
 122                  << request->GetResponseCode();
 123   }
 124   RequestComplete(request);
 125 }
 126
 127 void ChromeFraudulentCertificateReporter::OnReadCompleted(
 128     net::URLRequest* request, int bytes_read) {}
 129
 130 }  // namespace chrome_browser_net