chrome/browser/chromeos/policy/policy_cert_service.cc

   1 // Copyright 2013 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/chromeos/policy/policy_cert_service.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/logging.h"
  10 #include "chrome/browser/chromeos/login/user_manager.h"
  11 #include "chrome/browser/chromeos/policy/policy_cert_service_factory.h"
  12 #include "chrome/browser/chromeos/policy/policy_cert_verifier.h"
  13 #include "content/public/browser/browser_thread.h"
  14 #include "net/cert/x509_certificate.h"
  15
  16 namespace policy {
  17
  18 PolicyCertService::~PolicyCertService() {
  19   DCHECK(cert_verifier_)
  20       << "CreatePolicyCertVerifier() must be called after construction.";
  21 }
  22
  23 PolicyCertService::PolicyCertService(
  24     const std::string& user_id,
  25     UserNetworkConfigurationUpdater* net_conf_updater,
  26     chromeos::UserManager* user_manager)
  27     : cert_verifier_(NULL),
  28       user_id_(user_id),
  29       net_conf_updater_(net_conf_updater),
  30       user_manager_(user_manager),
  31       has_trust_anchors_(false),
  32       weak_ptr_factory_(this) {
  33   DCHECK(net_conf_updater_);
  34   DCHECK(user_manager_);
  35 }
  36
  37 PolicyCertService::PolicyCertService(const std::string& user_id,
  38                                      PolicyCertVerifier* verifier,
  39                                      chromeos::UserManager* user_manager)
  40     : cert_verifier_(verifier),
  41       user_id_(user_id),
  42       net_conf_updater_(NULL),
  43       user_manager_(user_manager),
  44       has_trust_anchors_(false),
  45       weak_ptr_factory_(this) {}
  46
  47 scoped_ptr<PolicyCertVerifier> PolicyCertService::CreatePolicyCertVerifier() {
  48   base::Closure callback = base::Bind(
  49       &PolicyCertServiceFactory::SetUsedPolicyCertificates, user_id_);
  50   cert_verifier_ = new PolicyCertVerifier(
  51       base::Bind(base::IgnoreResult(&content::BrowserThread::PostTask),
  52                  content::BrowserThread::UI,
  53                  FROM_HERE,
  54                  callback));
  55   // Certs are forwarded to |cert_verifier_|, thus register here after
  56   // |cert_verifier_| is created.
  57   net_conf_updater_->AddTrustedCertsObserver(this);
  58
  59   // Set the current list of trust anchors.
  60   net::CertificateList trust_anchors;
  61   net_conf_updater_->GetWebTrustedCertificates(&trust_anchors);
  62   OnTrustAnchorsChanged(trust_anchors);
  63
  64   return make_scoped_ptr(cert_verifier_);
  65 }
  66
  67 void PolicyCertService::OnTrustAnchorsChanged(
  68     const net::CertificateList& trust_anchors) {
  69   DCHECK(cert_verifier_);
  70
  71   // Do not use certificates installed via ONC policy if the current session has
  72   // multiple profiles. This is important to make sure that any possibly tainted
  73   // data is absolutely confined to the managed profile and never, ever leaks to
  74   // any other profile.
  75   if (!trust_anchors.empty() && user_manager_->GetLoggedInUsers().size() > 1u) {
  76     LOG(ERROR) << "Ignoring ONC-pushed certificates update because multiple "
  77                << "users are logged in.";
  78     return;
  79   }
  80
  81   has_trust_anchors_ = !trust_anchors.empty();
  82
  83   // It's safe to use base::Unretained here, because it's guaranteed that
  84   // |cert_verifier_| outlives this object (see description of
  85   // CreatePolicyCertVerifier).
  86   // Note: ProfileIOData, which owns the CertVerifier is deleted by a
  87   // DeleteSoon on IO, i.e. after all pending tasks on IO are finished.
  88   content::BrowserThread::PostTask(
  89       content::BrowserThread::IO,
  90       FROM_HERE,
  91       base::Bind(&PolicyCertVerifier::SetTrustAnchors,
  92                  base::Unretained(cert_verifier_),
  93                  trust_anchors));
  94 }
  95
  96 bool PolicyCertService::UsedPolicyCertificates() const {
  97   return PolicyCertServiceFactory::UsedPolicyCertificates(user_id_);
  98 }
  99
 100 void PolicyCertService::Shutdown() {
 101   weak_ptr_factory_.InvalidateWeakPtrs();
 102   if (net_conf_updater_)
 103     net_conf_updater_->RemoveTrustedCertsObserver(this);
 104   OnTrustAnchorsChanged(net::CertificateList());
 105   net_conf_updater_ = NULL;
 106 }
 107
 108 // static
 109 scoped_ptr<PolicyCertService> PolicyCertService::CreateForTesting(
 110     const std::string& user_id,
 111     PolicyCertVerifier* verifier,
 112     chromeos::UserManager* user_manager) {
 113   return make_scoped_ptr(
 114       new PolicyCertService(user_id, verifier, user_manager));
 115 }
 116
 117 }  // namespace policy