Add method to get random bytes from the TPM.

tpm_init.cc

 // Copyright (c) 2009-2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Contains the implementation of class TpmInit
 
 #include "tpm_init.h"
 
 #include <base/logging.h>
 #include <base/time.h>
@@ skipping 10 matching lines @@
   virtual ~TpmInitTask();
 
   void Init();
 
   virtual void ThreadMain();
 
   bool IsTpmReady();
   bool IsTpmEnabled();
   bool GetTpmPassword(chromeos::Blob* password);
   long GetInitializationMillis();
+  bool GetRandomData(int length, chromeos::Blob* data);
 
  private:
   scoped_ptr<tpm_init::Tpm> default_tpm_;
   tpm_init::Tpm* tpm_;
   bool initialize_status_;
   bool task_done_;
   long initialization_time_;
 };
 
 TpmInit::TpmInit()
     : tpm_init_(new TpmInitTask()) {
 }
 
 TpmInit::~TpmInit() {
 }
 
+bool TpmInit::GetRandomData(int length, chromeos::Blob* data) {
+  return tpm_init_->GetRandomData(length, data);
+}
+
 bool TpmInit::StartInitializeTpm() {
   tpm_init_->Init();
   if (!PlatformThread::CreateNonJoinable(0, tpm_init_.get())) {
     LOG(ERROR) << "Unable to create TPM initialization background thread.";
     return false;
   }
   return true;
 }
 
 bool TpmInit::IsTpmReady() {
@@ skipping 61 matching lines @@
 }
 
 bool TpmInitTask::GetTpmPassword(chromeos::Blob* password) {
   return tpm_->GetOwnerPassword(password);
 }
 
 long TpmInitTask::GetInitializationMillis() {
   return initialization_time_;
 }
 
+bool TpmInitTask::GetRandomData(int length, chromeos::Blob* data) {
+  return tpm_->GetRandomData(length, data);
+}
+
 }  // namespace tpm_init