mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
113 lines
3.0 KiB
C++
113 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/EMEUtils.h"
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namespace mozilla {
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PRLogModuleInfo* GetEMELog() {
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static PRLogModuleInfo* log = nullptr;
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if (!log) {
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log = PR_NewLogModule("EME");
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}
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return log;
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}
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PRLogModuleInfo* GetEMEVerboseLog() {
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static PRLogModuleInfo* log = nullptr;
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if (!log) {
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log = PR_NewLogModule("EMEV");
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}
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return log;
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}
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static bool
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ContainsOnlyDigits(const nsAString& aString)
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{
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nsAString::const_iterator iter, end;
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aString.BeginReading(iter);
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aString.EndReading(end);
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while (iter != end) {
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char16_t ch = *iter;
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if (ch < '0' || ch > '9') {
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return false;
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}
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iter++;
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}
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return true;
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}
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static bool
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ParseKeySystem(const nsAString& aExpectedKeySystem,
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const nsAString& aInputKeySystem,
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int32_t& aOutCDMVersion)
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{
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if (!StringBeginsWith(aInputKeySystem, aExpectedKeySystem)) {
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return false;
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}
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if (aInputKeySystem.Length() > aExpectedKeySystem.Length() + 8) {
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// Allow up to 8 bytes for the ".version" field. 8 bytes should
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// be enough for any versioning scheme...
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NS_WARNING("Input KeySystem including was suspiciously long");
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return false;
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}
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const char16_t* versionStart = aInputKeySystem.BeginReading() + aExpectedKeySystem.Length();
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const char16_t* end = aInputKeySystem.EndReading();
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if (versionStart == end) {
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// No version supplied with keysystem.
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aOutCDMVersion = NO_CDM_VERSION;
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return true;
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}
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if (*versionStart != '.') {
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// version not in correct format.
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NS_WARNING("EME keySystem version string not prefixed by '.'");
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return false;
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}
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versionStart++;
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const nsAutoString versionStr(Substring(versionStart, end));
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if (!ContainsOnlyDigits(versionStr)) {
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NS_WARNING("Non-digit character in EME keySystem string's version suffix");
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return false;
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}
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nsresult rv;
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int32_t version = versionStr.ToInteger(&rv);
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if (NS_FAILED(rv) || version < 0) {
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NS_WARNING("Invalid version in EME keySystem string");
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return false;
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}
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aOutCDMVersion = version;
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return true;
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}
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static const char16_t* sKeySystems[] = {
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MOZ_UTF16("org.w3.clearkey"),
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MOZ_UTF16("com.adobe.access"),
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MOZ_UTF16("com.adobe.primetime"),
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};
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bool
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ParseKeySystem(const nsAString& aInputKeySystem,
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nsAString& aOutKeySystem,
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int32_t& aOutCDMVersion)
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{
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for (const char16_t* keySystem : sKeySystems) {
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int32_t minCDMVersion = NO_CDM_VERSION;
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if (ParseKeySystem(nsDependentString(keySystem),
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aInputKeySystem,
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minCDMVersion)) {
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aOutKeySystem = keySystem;
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aOutCDMVersion = minCDMVersion;
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return true;
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}
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}
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return false;
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}
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} // namespace mozilla
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