components/ownership/owner_settings_service.cc

   1 // Copyright 2014 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 "components/ownership/owner_settings_service.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/bind.h"
   9 #include "base/callback.h"
  10 #include "base/location.h"
  11 #include "base/logging.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "base/task_runner.h"
  14 #include "base/task_runner_util.h"
  15 #include "components/ownership/owner_key_util.h"
  16 #include "crypto/signature_creator.h"
  17
  18 namespace em = enterprise_management;
  19
  20 namespace ownership {
  21
  22 namespace {
  23
  24 std::string AssembleAndSignPolicy(scoped_ptr<em::PolicyData> policy,
  25                                   crypto::RSAPrivateKey* private_key) {
  26   // Assemble the policy.
  27   em::PolicyFetchResponse policy_response;
  28   if (!policy->SerializeToString(policy_response.mutable_policy_data())) {
  29     LOG(ERROR) << "Failed to encode policy payload.";
  30     return std::string();
  31   }
  32
  33   // Generate the signature.
  34   scoped_ptr<crypto::SignatureCreator> signature_creator(
  35       crypto::SignatureCreator::Create(private_key,
  36                                        crypto::SignatureCreator::SHA1));
  37   signature_creator->Update(
  38       reinterpret_cast<const uint8*>(policy_response.policy_data().c_str()),
  39       policy_response.policy_data().size());
  40   std::vector<uint8> signature_bytes;
  41   std::string policy_blob;
  42   if (!signature_creator->Final(&signature_bytes)) {
  43     LOG(ERROR) << "Failed to create policy signature.";
  44     return std::string();
  45   }
  46
  47   policy_response.mutable_policy_data_signature()->assign(
  48       reinterpret_cast<const char*>(vector_as_array(&signature_bytes)),
  49       signature_bytes.size());
  50   return policy_response.SerializeAsString();
  51 }
  52
  53 }  // namepace
  54
  55 OwnerSettingsService::OwnerSettingsService(
  56     const scoped_refptr<ownership::OwnerKeyUtil>& owner_key_util)
  57     : owner_key_util_(owner_key_util), weak_factory_(this) {
  58 }
  59
  60 OwnerSettingsService::~OwnerSettingsService() {
  61   DCHECK(thread_checker_.CalledOnValidThread());
  62 }
  63
  64 bool OwnerSettingsService::IsOwner() {
  65   DCHECK(thread_checker_.CalledOnValidThread());
  66   return private_key_.get() && private_key_->key();
  67 }
  68
  69 void OwnerSettingsService::IsOwnerAsync(const IsOwnerCallback& callback) {
  70   DCHECK(thread_checker_.CalledOnValidThread());
  71   if (private_key_.get()) {
  72     base::MessageLoop::current()->PostTask(FROM_HERE,
  73                                            base::Bind(callback, IsOwner()));
  74   } else {
  75     pending_is_owner_callbacks_.push_back(callback);
  76   }
  77 }
  78
  79 bool OwnerSettingsService::AssembleAndSignPolicyAsync(
  80     base::TaskRunner* task_runner,
  81     scoped_ptr<em::PolicyData> policy,
  82     const AssembleAndSignPolicyAsyncCallback& callback) {
  83   DCHECK(thread_checker_.CalledOnValidThread());
  84   if (!task_runner || !IsOwner())
  85     return false;
  86   return base::PostTaskAndReplyWithResult(
  87       task_runner,
  88       FROM_HERE,
  89       base::Bind(
  90           &AssembleAndSignPolicy, base::Passed(&policy), private_key_->key()),
  91       callback);
  92 }
  93
  94 void OwnerSettingsService::ReloadKeypair() {
  95   ReloadKeypairImpl(
  96       base::Bind(&OwnerSettingsService::OnKeypairLoaded, as_weak_ptr()));
  97 }
  98
  99 void OwnerSettingsService::OnKeypairLoaded(
 100     const scoped_refptr<PublicKey>& public_key,
 101     const scoped_refptr<PrivateKey>& private_key) {
 102   DCHECK(thread_checker_.CalledOnValidThread());
 103
 104   public_key_ = public_key;
 105   private_key_ = private_key;
 106
 107   const bool is_owner = IsOwner();
 108   std::vector<IsOwnerCallback> is_owner_callbacks;
 109   is_owner_callbacks.swap(pending_is_owner_callbacks_);
 110   for (std::vector<IsOwnerCallback>::iterator it(is_owner_callbacks.begin());
 111        it != is_owner_callbacks.end();
 112        ++it) {
 113     it->Run(is_owner);
 114   }
 115
 116   OnPostKeypairLoadedActions();
 117 }
 118
 119 }  // namespace ownership