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// Copyright 2014 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 "chrome/renderer/pepper/pepper_uma_host.h"
#include <stddef.h>
#include "base/hash/sha1.h"
#include "base/metrics/histogram.h"
#include "base/stl_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "chrome/common/chrome_content_client.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/render_messages.h"
#include "chrome/renderer/chrome_content_renderer_client.h"
#include "content/public/renderer/pepper_plugin_instance.h"
#include "content/public/renderer/render_thread.h"
#include "content/public/renderer/renderer_ppapi_host.h"
#include "extensions/buildflags/buildflags.h"
#include "media/media_buildflags.h"
#include "ppapi/buildflags/buildflags.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/host/dispatch_host_message.h"
#include "ppapi/host/host_message_context.h"
#include "ppapi/host/ppapi_host.h"
#include "ppapi/proxy/ppapi_messages.h"
#if BUILDFLAG(ENABLE_EXTENSIONS)
#include "extensions/common/constants.h"
#include "extensions/common/extension.h"
#endif // BUILDFLAG(ENABLE_EXTENSIONS)
namespace {
const char* const kPredefinedAllowedUMAOrigins[] = {
"6EAED1924DB611B6EEF2A664BD077BE7EAD33B8F", // see http://crbug.com/317833
"4EB74897CB187C7633357C2FE832E0AD6A44883A", // see http://crbug.com/317833
"9E527CDA9D7C50844E8A5DB964A54A640AE48F98", // see http://crbug.com/521189
"DF52618D0B040D8A054D8348D2E84DDEEE5974E7", // see http://crbug.com/521189
"269D721F163E587BC53C6F83553BF9CE2BB143CD", // see http://crbug.com/521189
"6B55A5329E3F1F30F6032BDB20B2EB4378DBF767", // see http://crbug.com/521189
"C449A798C495E6CF7D6AF10162113D564E67AD12", // see http://crbug.com/521189
"01E9FFA9A8F3C18271FE91BEE46207F3B81755CC", // see http://crbug.com/521189
"97B23E01B2AA064E8332EE43A7A85C628AADC3F2", // see http://crbug.com/521189
};
const char* const kWhitelistedHistogramPrefixes[] = {
"22F67DA2061FFC4DC9A4974036348D9C38C22919", // see http://crbug.com/390221
"3FEA4650221C5E6C39CF5C5C9F464FF74EAB6CE1", // see http://crbug.com/521189
};
const base::FilePath::CharType* const kWhitelistedPluginBaseNames[] = {
ChromeContentClient::kPDFPluginPath,
};
std::string HashPrefix(const std::string& histogram) {
const std::string id_hash =
base::SHA1HashString(histogram.substr(0, histogram.find('.')));
DCHECK_EQ(id_hash.length(), base::kSHA1Length);
return base::HexEncode(id_hash.c_str(), id_hash.length());
}
} // namespace
PepperUMAHost::PepperUMAHost(content::RendererPpapiHost* host,
PP_Instance instance,
PP_Resource resource)
: ResourceHost(host->GetPpapiHost(), instance, resource),
document_url_(host->GetDocumentURL(instance)),
is_plugin_in_process_(host->IsRunningInProcess()) {
if (host->GetPluginInstance(instance)) {
plugin_base_name_ =
host->GetPluginInstance(instance)->GetModulePath().BaseName();
}
for (size_t i = 0; i < base::size(kPredefinedAllowedUMAOrigins); ++i)
allowed_origins_.insert(kPredefinedAllowedUMAOrigins[i]);
for (size_t i = 0; i < base::size(kWhitelistedHistogramPrefixes); ++i)
allowed_histogram_prefixes_.insert(kWhitelistedHistogramPrefixes[i]);
for (size_t i = 0; i < base::size(kWhitelistedPluginBaseNames); ++i)
allowed_plugin_base_names_.insert(kWhitelistedPluginBaseNames[i]);
}
PepperUMAHost::~PepperUMAHost() {}
int32_t PepperUMAHost::OnResourceMessageReceived(
const IPC::Message& msg,
ppapi::host::HostMessageContext* context) {
PPAPI_BEGIN_MESSAGE_MAP(PepperUMAHost, msg)
PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_UMA_HistogramCustomTimes,
OnHistogramCustomTimes)
PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_UMA_HistogramCustomCounts,
OnHistogramCustomCounts)
PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_UMA_HistogramEnumeration,
OnHistogramEnumeration)
PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(
PpapiHostMsg_UMA_IsCrashReportingEnabled, OnIsCrashReportingEnabled)
PPAPI_END_MESSAGE_MAP()
return PP_ERROR_FAILED;
}
bool PepperUMAHost::IsPluginWhitelisted() {
#if BUILDFLAG(ENABLE_EXTENSIONS)
return ChromeContentRendererClient::IsExtensionOrSharedModuleWhitelisted(
document_url_, allowed_origins_);
#else
return false;
#endif
}
bool PepperUMAHost::IsHistogramAllowed(const std::string& histogram) {
if (is_plugin_in_process_ &&
base::StartsWith(histogram, "NaCl.", base::CompareCase::SENSITIVE)) {
return true;
}
if (IsPluginWhitelisted() &&
base::Contains(allowed_histogram_prefixes_, HashPrefix(histogram))) {
return true;
}
if (base::Contains(allowed_plugin_base_names_, plugin_base_name_.value()))
return true;
LOG(ERROR) << "Host or histogram name is not allowed to use the UMA API.";
return false;
}
#define RETURN_IF_BAD_ARGS(_min, _max, _buckets) \
do { \
if (_min >= _max || _buckets <= 1) \
return PP_ERROR_BADARGUMENT; \
} while (0)
int32_t PepperUMAHost::OnHistogramCustomTimes(
ppapi::host::HostMessageContext* context,
const std::string& name,
int64_t sample,
int64_t min,
int64_t max,
uint32_t bucket_count) {
if (!IsHistogramAllowed(name)) {
return PP_ERROR_NOACCESS;
}
RETURN_IF_BAD_ARGS(min, max, bucket_count);
base::HistogramBase* counter = base::Histogram::FactoryTimeGet(
name,
base::TimeDelta::FromMilliseconds(min),
base::TimeDelta::FromMilliseconds(max),
bucket_count,
base::HistogramBase::kUmaTargetedHistogramFlag);
// The histogram can be NULL if it is constructed with bad arguments. Ignore
// that data for this API. An error message will be logged.
if (counter)
counter->AddTime(base::TimeDelta::FromMilliseconds(sample));
return PP_OK;
}
int32_t PepperUMAHost::OnHistogramCustomCounts(
ppapi::host::HostMessageContext* context,
const std::string& name,
int32_t sample,
int32_t min,
int32_t max,
uint32_t bucket_count) {
if (!IsHistogramAllowed(name)) {
return PP_ERROR_NOACCESS;
}
RETURN_IF_BAD_ARGS(min, max, bucket_count);
base::HistogramBase* counter = base::Histogram::FactoryGet(
name,
min,
max,
bucket_count,
base::HistogramBase::kUmaTargetedHistogramFlag);
// The histogram can be NULL if it is constructed with bad arguments. Ignore
// that data for this API. An error message will be logged.
if (counter)
counter->Add(sample);
return PP_OK;
}
int32_t PepperUMAHost::OnHistogramEnumeration(
ppapi::host::HostMessageContext* context,
const std::string& name,
int32_t sample,
int32_t boundary_value) {
if (!IsHistogramAllowed(name)) {
return PP_ERROR_NOACCESS;
}
RETURN_IF_BAD_ARGS(0, boundary_value, boundary_value + 1);
base::HistogramBase* counter = base::LinearHistogram::FactoryGet(
name,
1,
boundary_value,
boundary_value + 1,
base::HistogramBase::kUmaTargetedHistogramFlag);
// The histogram can be NULL if it is constructed with bad arguments. Ignore
// that data for this API. An error message will be logged.
if (counter)
counter->Add(sample);
return PP_OK;
}
int32_t PepperUMAHost::OnIsCrashReportingEnabled(
ppapi::host::HostMessageContext* context) {
if (!IsPluginWhitelisted())
return PP_ERROR_NOACCESS;
bool enabled = false;
content::RenderThread::Get()->Send(
new ChromeViewHostMsg_IsCrashReportingEnabled(&enabled));
if (enabled)
return PP_OK;
return PP_ERROR_FAILED;
}
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