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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/usage_stats_consent.h"
#include <windows.h>
#include <string>
#include "base/logging.h"
#include "base/stringprintf.h"
#include "base/win/registry.h"
#include "remoting/host/win/omaha.h"
namespace {
// The following strings are used to construct the registry key names where
// we record whether the user has consented to crash dump collection.
// the user's consent to collect crash dumps is recorded.
const wchar_t kOmahaClientStateKeyFormat[] =
L"Software\\Google\\Update\\%ls\\%ls";
const wchar_t kOmahaClientState[] = L"ClientState";
const wchar_t kOmahaClientStateMedium[] = L"ClientStateMedium";
const wchar_t kOmahaUsagestatsValue[] = L"usagestats";
LONG ReadUsageStatsValue(const wchar_t* state_key, DWORD* usagestats_out) {
// presubmit: allow wstring
std::wstring client_state = StringPrintf(kOmahaClientStateKeyFormat,
state_key,
remoting::kHostOmahaAppid);
base::win::RegKey key;
LONG result = key.Open(HKEY_LOCAL_MACHINE, client_state.c_str(), KEY_READ);
if (result != ERROR_SUCCESS) {
return result;
}
return key.ReadValueDW(kOmahaUsagestatsValue, usagestats_out);
}
} // namespace
namespace remoting {
bool GetUsageStatsConsent(bool* allowed, bool* set_by_policy) {
// TODO(alexeypa): report whether the consent is set by policy once
// supported.
*set_by_policy = false;
// The user's consent to collect crash dumps is recored as the "usagestats"
// value in the ClientState or ClientStateMedium key. Probe
// the ClientStateMedium key first.
DWORD value = 0;
if (ReadUsageStatsValue(kOmahaClientStateMedium, &value) == ERROR_SUCCESS) {
*allowed = value != 0;
return true;
}
if (ReadUsageStatsValue(kOmahaClientState, &value) == ERROR_SUCCESS) {
*allowed = value != 0;
return true;
}
// We do not log the error code here because the logging hasn't been
// initialized yet.
return false;
}
bool IsUsageStatsAllowed() {
bool allowed;
bool set_by_policy;
return GetUsageStatsConsent(&allowed, &set_by_policy) && allowed;
}
bool SetUsageStatsConsent(bool allowed) {
DWORD value = allowed;
// presubmit: allow wstring
std::wstring client_state = StringPrintf(kOmahaClientStateKeyFormat,
kOmahaClientStateMedium,
kHostOmahaAppid);
base::win::RegKey key;
LONG result = key.Create(HKEY_LOCAL_MACHINE, client_state.c_str(),
KEY_SET_VALUE);
if (result == ERROR_SUCCESS) {
result = key.WriteValue(kOmahaUsagestatsValue, value);
if (result == ERROR_SUCCESS) {
return true;
}
}
LOG_GETLASTERROR(ERROR)
<< "Failed to record the user's consent to crash dump reporting";
return false;
}
} // namespace remoting
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