static void
InitializeHooks()
{
static bool initialized = false;
if (initialized) {
return;
}
initialized = true;
sDeviceNames = new std::unordered_map<std::wstring, std::wstring>();
for (const std::wstring& name : GetDosDeviceNames()) {
sDeviceNames->emplace(name, GetDeviceMapping(name));
}
sKernel32Intercept.Init("kernelbase.dll");
sOriginalQueryDosDeviceWFnPtr.Set(sKernel32Intercept, "QueryDosDeviceW",
&QueryDosDeviceWHook);
}
void Compatibility::Init() {
// Note we collect some AT statistics/telemetry here for convenience.
InitConsumers();
CrashReporter::AnnotateCrashReport(
CrashReporter::Annotation::AccessibilityInProcClient,
nsPrintfCString("0x%X", sConsumers));
// Gather telemetry
uint32_t temp = sConsumers;
for (int i = 0; temp; i++) {
if (temp & 0x1) statistics::A11yConsumers(i);
temp >>= 1;
}
// Turn off new tab switching for Jaws and WE.
if (sConsumers & (JAWS | OLDJAWS | WE)) {
// Check to see if the pref for disallowing CtrlTab is already set. If so,
// bail out (respect the user settings). If not, set it.
if (!Preferences::HasUserValue("browser.ctrlTab.disallowForScreenReaders"))
Preferences::SetBool("browser.ctrlTab.disallowForScreenReaders", true);
}
// If we have a consumer who is not NVDA, we enable detection for the
// InSendMessageEx compatibility hack. NVDA does not require this.
// We also skip UIA, as we see crashes there.
if ((sConsumers & (~(UIAUTOMATION | NVDA))) && BrowserTabsRemoteAutostart()) {
sUser32Interceptor.Init("user32.dll");
sInSendMessageExStub.Set(sUser32Interceptor, "InSendMessageEx",
&InSendMessageExHook);
// The vectored exception handler allows us to catch exceptions ahead of any
// SEH handlers.
if (!sVectoredExceptionHandler) {
// We need to let ASan's ShadowExceptionHandler remain in the firstHandler
// position, otherwise we'll get infinite recursion when our handler
// faults on shadow memory.
const ULONG firstHandler = FALSE;
sVectoredExceptionHandler = AddVectoredExceptionHandler(
firstHandler, &DetectInSendMessageExCompat);
}
}
}
namespace mozilla {
#ifdef XP_WIN
static void
InitializeHooks();
#endif
ChromiumCDMAdapter::ChromiumCDMAdapter(nsTArray<Pair<nsCString, nsCString>>&& aHostPathPairs)
{
#ifdef XP_WIN
InitializeHooks();
#endif
PopulateHostFiles(std::move(aHostPathPairs));
}
void
ChromiumCDMAdapter::SetAdaptee(PRLibrary* aLib)
{
mLib = aLib;
}
void*
ChromiumCdmHost(int aHostInterfaceVersion, void* aUserData)
{
GMP_LOG("ChromiumCdmHostFunc(%d, %p)", aHostInterfaceVersion, aUserData);
if (aHostInterfaceVersion != cdm::Host_8::kVersion &&
aHostInterfaceVersion != cdm::Host_9::kVersion) {
return nullptr;
}
return aUserData;
}
#define STRINGIFY(s) _STRINGIFY(s)
#define _STRINGIFY(s) #s
#ifdef MOZILLA_OFFICIAL
static cdm::HostFile
TakeToCDMHostFile(HostFileData& aHostFileData)
{
return cdm::HostFile(aHostFileData.mBinary.Path().get(),
aHostFileData.mBinary.TakePlatformFile(),
aHostFileData.mSig.TakePlatformFile());
}
#endif
GMPErr
ChromiumCDMAdapter::GMPInit(const GMPPlatformAPI* aPlatformAPI)
{
GMP_LOG("ChromiumCDMAdapter::GMPInit");
sPlatform = aPlatformAPI;
if (!mLib) {
return GMPGenericErr;
}
#ifdef MOZILLA_OFFICIAL
// Note: we must call the VerifyCdmHost_0 function if it's present before
// we call the initialize function.
auto verify = reinterpret_cast<decltype(::VerifyCdmHost_0)*>(
PR_FindFunctionSymbol(mLib, STRINGIFY(VerifyCdmHost_0)));
if (verify) {
nsTArray<cdm::HostFile> files;
for (HostFileData& hostFile : mHostFiles) {
files.AppendElement(TakeToCDMHostFile(hostFile));
}
bool result = verify(files.Elements(), files.Length());
GMP_LOG("%s VerifyCdmHost_0 returned %d", __func__, result);
}
#endif
auto init = reinterpret_cast<decltype(::INITIALIZE_CDM_MODULE)*>(
PR_FindFunctionSymbol(mLib, STRINGIFY(INITIALIZE_CDM_MODULE)));
if (!init) {
return GMPGenericErr;
}
GMP_LOG(STRINGIFY(INITIALIZE_CDM_MODULE) "()");
init();
return GMPNoErr;
}
GMPErr
ChromiumCDMAdapter::GMPGetAPI(const char* aAPIName,
void* aHostAPI,
void** aPluginAPI,
uint32_t aDecryptorId)
{
GMP_LOG("ChromiumCDMAdapter::GMPGetAPI(%s, 0x%p, 0x%p, %u) this=0x%p",
aAPIName,
aHostAPI,
aPluginAPI,
aDecryptorId,
this);
bool isCDM9 = !strcmp(aAPIName, CHROMIUM_CDM_API);
bool isCDM8 = !strcmp(aAPIName, CHROMIUM_CDM_API_BACKWARD_COMPAT);
if (isCDM8 || isCDM9) {
auto create = reinterpret_cast<decltype(::CreateCdmInstance)*>(
PR_FindFunctionSymbol(mLib, "CreateCdmInstance"));
if (!create) {
GMP_LOG("ChromiumCDMAdapter::GMPGetAPI(%s, 0x%p, 0x%p, %u) this=0x%p "
"FAILED to find CreateCdmInstance",
aAPIName,
aHostAPI,
aPluginAPI,
aDecryptorId,
this);
return GMPGenericErr;
}
int version = isCDM8 ? cdm::ContentDecryptionModule_8::kVersion :
cdm::ContentDecryptionModule_9::kVersion;
void* cdm =
create(version,
kEMEKeySystemWidevine.get(),
kEMEKeySystemWidevine.Length(),
&ChromiumCdmHost,
aHostAPI);
if (!cdm) {
GMP_LOG("ChromiumCDMAdapter::GMPGetAPI(%s, 0x%p, 0x%p, %u) this=0x%p "
"FAILED to create cdm version %d",
aAPIName,
aHostAPI,
aPluginAPI,
aDecryptorId,
this,
version);
return GMPGenericErr;
}
GMP_LOG("cdm: 0x%p, version: %d", cdm, version);
*aPluginAPI = cdm;
}
return *aPluginAPI ? GMPNoErr : GMPNotImplementedErr;
}
void
ChromiumCDMAdapter::GMPShutdown()
{
GMP_LOG("ChromiumCDMAdapter::GMPShutdown()");
decltype(::DeinitializeCdmModule)* deinit;
deinit = (decltype(deinit))(PR_FindFunctionSymbol(mLib, "DeinitializeCdmModule"));
if (deinit) {
GMP_LOG("DeinitializeCdmModule()");
deinit();
}
}
/* static */
bool
ChromiumCDMAdapter::Supports(int32_t aModuleVersion,
int32_t aInterfaceVersion,
int32_t aHostVersion)
{
return aModuleVersion == CDM_MODULE_VERSION &&
(aInterfaceVersion == cdm::ContentDecryptionModule_8::kVersion ||
aInterfaceVersion == cdm::ContentDecryptionModule_9::kVersion) &&
(aHostVersion == cdm::Host_8::kVersion ||
aHostVersion == cdm::Host_9::kVersion);
}
#ifdef XP_WIN
static WindowsDllInterceptor sKernel32Intercept;
typedef DWORD(WINAPI* QueryDosDeviceWFnPtr)(_In_opt_ LPCWSTR lpDeviceName,
_Out_ LPWSTR lpTargetPath,
_In_ DWORD ucchMax);
static WindowsDllInterceptor::FuncHookType<QueryDosDeviceWFnPtr>
sOriginalQueryDosDeviceWFnPtr;
static std::unordered_map<std::wstring, std::wstring>* sDeviceNames = nullptr;
DWORD WINAPI
QueryDosDeviceWHook(LPCWSTR lpDeviceName, LPWSTR lpTargetPath, DWORD ucchMax)
{
if (!sDeviceNames) {
return 0;
}
std::wstring name = std::wstring(lpDeviceName);
auto iter = sDeviceNames->find(name);
if (iter == sDeviceNames->end()) {
return 0;
}
const std::wstring& device = iter->second;
if (device.size() + 1 > ucchMax) {
return 0;
}
PodCopy(lpTargetPath, device.c_str(), device.size());
lpTargetPath[device.size()] = 0;
GMP_LOG("QueryDosDeviceWHook %S -> %S", lpDeviceName, lpTargetPath);
return name.size();
}
static std::vector<std::wstring>
GetDosDeviceNames()
{
std::vector<std::wstring> v;
std::vector<wchar_t> buf;
buf.resize(1024);
DWORD rv = GetLogicalDriveStringsW(buf.size(), buf.data());
if (rv == 0 || rv > buf.size()) {
return v;
}
// buf will be a list of null terminated strings, with the last string
// being 0 length.
const wchar_t* p = buf.data();
const wchar_t* end = &buf.back();
size_t l;
while (p < end && (l = wcsnlen_s(p, end - p)) > 0) {
// The string is of the form "C:\". We need to strip off the trailing
// backslash.
std::wstring drive = std::wstring(p, p + l);
if (drive.back() == '\\') {
drive.erase(drive.end() - 1);
}
v.push_back(move(drive));
p += l + 1;
}
return v;
}
static std::wstring
GetDeviceMapping(const std::wstring& aDosDeviceName)
{
wchar_t buf[MAX_PATH] = { 0 };
DWORD rv = QueryDosDeviceW(aDosDeviceName.c_str(), buf, MAX_PATH);
if (rv == 0) {
return std::wstring(L"");
}
return std::wstring(buf, buf + rv);
}
static void
InitializeHooks()
{
static bool initialized = false;
if (initialized) {
return;
}
initialized = true;
sDeviceNames = new std::unordered_map<std::wstring, std::wstring>();
for (const std::wstring& name : GetDosDeviceNames()) {
sDeviceNames->emplace(name, GetDeviceMapping(name));
}
sKernel32Intercept.Init("kernelbase.dll");
sOriginalQueryDosDeviceWFnPtr.Set(sKernel32Intercept, "QueryDosDeviceW",
&QueryDosDeviceWHook);
}
#endif
HostFile::HostFile(HostFile&& aOther)
: mPath(aOther.mPath)
, mFile(aOther.TakePlatformFile())
{
}
HostFile::~HostFile()
{
if (mFile != cdm::kInvalidPlatformFile) {
#ifdef XP_WIN
CloseHandle(mFile);
#else
close(mFile);
#endif
mFile = cdm::kInvalidPlatformFile;
}
}
#ifdef XP_WIN
HostFile::HostFile(const nsCString& aPath)
: mPath(NS_ConvertUTF8toUTF16(aPath))
{
HANDLE handle = CreateFileW(mPath.get(),
GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL);
mFile = (handle == INVALID_HANDLE_VALUE) ? cdm::kInvalidPlatformFile : handle;
}
#endif
#ifndef XP_WIN
HostFile::HostFile(const nsCString& aPath)
: mPath(aPath)
{
// Note: open() returns -1 on failure; i.e. kInvalidPlatformFile.
mFile = open(aPath.get(), O_RDONLY);
}
#endif
cdm::PlatformFile
HostFile::TakePlatformFile()
{
cdm::PlatformFile f = mFile;
mFile = cdm::kInvalidPlatformFile;
return f;
}
void
ChromiumCDMAdapter::PopulateHostFiles(nsTArray<Pair<nsCString, nsCString>>&& aHostPathPairs)
{
for (const auto& pair : aHostPathPairs) {
mHostFiles.AppendElement(
HostFileData(mozilla::HostFile(pair.first()),
mozilla::HostFile(pair.second())));
}
}
} // namespace mozilla