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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "GMPUtils.h"
#include "nsDirectoryServiceDefs.h"
#include "nsIFile.h"
#include "nsCOMPtr.h"
#include "nsLiteralString.h"
#include "nsCRTGlue.h"
#include "mozIGeckoMediaPluginService.h"
#include "mozilla/Base64.h"
#include "nsISimpleEnumerator.h"
#include "prio.h"
namespace mozilla {
bool
GetEMEVoucherPath(nsIFile** aPath)
{
nsCOMPtr<nsIFile> path;
NS_GetSpecialDirectory(NS_GRE_DIR, getter_AddRefs(path));
if (!path) {
NS_WARNING("GetEMEVoucherPath can't get NS_GRE_DIR!");
return false;
}
path->AppendNative(NS_LITERAL_CSTRING("voucher.bin"));
path.forget(aPath);
return true;
}
bool
EMEVoucherFileExists()
{
nsCOMPtr<nsIFile> path;
bool exists;
return GetEMEVoucherPath(getter_AddRefs(path)) &&
NS_SUCCEEDED(path->Exists(&exists)) &&
exists;
}
void
SplitAt(const char* aDelims,
const nsACString& aInput,
nsTArray<nsCString>& aOutTokens)
{
nsAutoCString str(aInput);
char* end = str.BeginWriting();
const char* start = nullptr;
while (!!(start = NS_strtok(aDelims, &end))) {
aOutTokens.AppendElement(nsCString(start));
}
}
nsCString
ToBase64(const nsTArray<uint8_t>& aBytes)
{
nsAutoCString base64;
nsDependentCSubstring raw(reinterpret_cast<const char*>(aBytes.Elements()),
aBytes.Length());
nsresult rv = Base64Encode(raw, base64);
if (NS_WARN_IF(NS_FAILED(rv))) {
return NS_LITERAL_CSTRING("[Base64EncodeFailed]");
}
return base64;
}
bool
FileExists(nsIFile* aFile)
{
bool exists = false;
return aFile && NS_SUCCEEDED(aFile->Exists(&exists)) && exists;
}
DirectoryEnumerator::DirectoryEnumerator(nsIFile* aPath, Mode aMode)
: mMode(aMode)
{
aPath->GetDirectoryEntries(getter_AddRefs(mIter));
}
already_AddRefed<nsIFile>
DirectoryEnumerator::Next()
{
if (!mIter) {
return nullptr;
}
bool hasMore = false;
while (NS_SUCCEEDED(mIter->HasMoreElements(&hasMore)) && hasMore) {
nsCOMPtr<nsISupports> supports;
nsresult rv = mIter->GetNext(getter_AddRefs(supports));
if (NS_FAILED(rv)) {
continue;
}
nsCOMPtr<nsIFile> path(do_QueryInterface(supports, &rv));
if (NS_FAILED(rv)) {
continue;
}
if (mMode == DirsOnly) {
bool isDirectory = false;
rv = path->IsDirectory(&isDirectory);
if (NS_FAILED(rv) || !isDirectory) {
continue;
}
}
return path.forget();
}
return nullptr;
}
bool
ReadIntoArray(nsIFile* aFile,
nsTArray<uint8_t>& aOutDst,
size_t aMaxLength)
{
if (!FileExists(aFile)) {
return false;
}
PRFileDesc* fd = nullptr;
nsresult rv = aFile->OpenNSPRFileDesc(PR_RDONLY, 0, &fd);
if (NS_FAILED(rv)) {
return false;
}
int32_t length = PR_Seek(fd, 0, PR_SEEK_END);
PR_Seek(fd, 0, PR_SEEK_SET);
if (length < 0 || (size_t)length > aMaxLength) {
NS_WARNING("EME file is longer than maximum allowed length");
PR_Close(fd);
return false;
}
aOutDst.SetLength(length);
int32_t bytesRead = PR_Read(fd, aOutDst.Elements(), length);
PR_Close(fd);
return (bytesRead == length);
}
bool
ReadIntoString(nsIFile* aFile,
nsCString& aOutDst,
size_t aMaxLength)
{
nsTArray<uint8_t> buf;
bool rv = ReadIntoArray(aFile, buf, aMaxLength);
if (rv) {
buf.AppendElement(0); // Append null terminator, required by nsC*String.
aOutDst = nsDependentCString((const char*)buf.Elements(), buf.Length() - 1);
}
return rv;
}
bool
GMPInfoFileParser::Init(nsIFile* aInfoFile)
{
nsTArray<nsCString> lines;
static const size_t MAX_GMP_INFO_FILE_LENGTH = 5 * 1024;
nsAutoCString info;
if (!ReadIntoString(aInfoFile, info, MAX_GMP_INFO_FILE_LENGTH)) {
NS_WARNING("Failed to read info file in GMP process.");
return false;
}
// Note: we pass "\r\n" to SplitAt so that we'll split lines delimited
// by \n (Unix), \r\n (Windows) and \r (old MacOSX).
SplitAt("\r\n", info, lines);
for (nsCString line : lines) {
// Field name is the string up to but not including the first ':'
// character on the line.
int32_t colon = line.FindChar(':');
if (colon <= 0) {
// Not allowed to be the first character.
// Info field name must be at least one character.
continue;
}
nsAutoCString key(Substring(line, 0, colon));
ToLowerCase(key);
key.Trim(" ");
nsCString* value = new nsCString(Substring(line, colon + 1));
value->Trim(" ");
mValues.Put(key, value); // Hashtable assumes ownership of value.
}
return true;
}
bool
GMPInfoFileParser::Contains(const nsCString& aKey) const {
nsCString key(aKey);
ToLowerCase(key);
return mValues.Contains(key);
}
nsCString
GMPInfoFileParser::Get(const nsCString& aKey) const {
MOZ_ASSERT(Contains(aKey));
nsCString key(aKey);
ToLowerCase(key);
nsCString* p = nullptr;
if (mValues.Get(key, &p)) {
return nsCString(*p);
}
return EmptyCString();
}
bool
HaveGMPFor(const nsCString& aAPI,
nsTArray<nsCString>&& aTags)
{
nsCOMPtr<mozIGeckoMediaPluginService> mps =
do_GetService("@mozilla.org/gecko-media-plugin-service;1");
if (NS_WARN_IF(!mps)) {
return false;
}
bool hasPlugin = false;
if (NS_FAILED(mps->HasPluginForAPI(aAPI, &aTags, &hasPlugin))) {
return false;
}
return hasPlugin;
}
} // namespace mozilla
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