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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 "mozilla/ArrayUtils.h"
#include "mozilla/Printf.h"
#include "mozilla/UniquePtr.h"
#include "ManifestParser.h"
#include <string.h>
#include "prio.h"
#if defined(XP_WIN)
# include <windows.h>
#elif defined(MOZ_WIDGET_COCOA)
# include <CoreServices/CoreServices.h>
# include "nsCocoaFeatures.h"
#elif defined(MOZ_WIDGET_GTK)
# include <gtk/gtk.h>
#endif
#ifdef MOZ_WIDGET_ANDROID
# include "AndroidBridge.h"
# include "mozilla/java/GeckoAppShellWrappers.h"
#endif
#ifdef MOZ_BACKGROUNDTASKS
# include "mozilla/BackgroundTasks.h"
#endif
#include "mozilla/Services.h"
#include "nsCRT.h"
#include "nsConsoleMessage.h"
#include "nsTextFormatter.h"
#include "nsVersionComparator.h"
#include "nsXPCOMCIDInternal.h"
#include "nsIConsoleService.h"
#include "nsIScriptError.h"
#include "nsIXULAppInfo.h"
#include "nsIXULRuntime.h"
using namespace mozilla;
struct ManifestDirective {
const char* directive;
int argc;
bool ischrome;
// The contentaccessible flags only apply to content/resource directives.
bool contentflags;
// Function to handle this directive. This isn't a union because C++ still
// hasn't learned how to initialize unions in a sane way.
void (nsComponentManagerImpl::*mgrfunc)(
nsComponentManagerImpl::ManifestProcessingContext& aCx, int aLineNo,
char* const* aArgv);
void (nsChromeRegistry::*regfunc)(
nsChromeRegistry::ManifestProcessingContext& aCx, int aLineNo,
char* const* aArgv, int aFlags);
};
static const ManifestDirective kParsingTable[] = {
// clang-format off
{
"manifest", 1, true, false,
&nsComponentManagerImpl::ManifestManifest, nullptr,
},
{
"component", 2, false, false,
&nsComponentManagerImpl::ManifestComponent, nullptr,
},
{
"contract", 2, false, false,
&nsComponentManagerImpl::ManifestContract, nullptr,
},
{
"category", 3, false, false,
&nsComponentManagerImpl::ManifestCategory, nullptr,
},
{
"content", 2, true, true,
nullptr, &nsChromeRegistry::ManifestContent,
},
{
"locale", 3, true, false,
nullptr, &nsChromeRegistry::ManifestLocale,
},
{
"skin", 3, true, false,
nullptr, &nsChromeRegistry::ManifestSkin,
},
{
// NB: note that while skin manifests can use this, they are only allowed
// to use it for chrome://../skin/ URLs
"override", 2, true, false,
nullptr, &nsChromeRegistry::ManifestOverride,
},
{
"resource", 2, false, true,
nullptr, &nsChromeRegistry::ManifestResource,
}
// clang-format on
};
static const char kWhitespace[] = "\t ";
static bool IsNewline(char aChar) { return aChar == '\n' || aChar == '\r'; }
void LogMessage(const char* aMsg, ...) {
MOZ_ASSERT(nsComponentManagerImpl::gComponentManager);
nsCOMPtr<nsIConsoleService> console =
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
if (!console) {
return;
}
va_list args;
va_start(args, aMsg);
SmprintfPointer formatted(mozilla::Vsmprintf(aMsg, args));
va_end(args);
nsCOMPtr<nsIConsoleMessage> error =
new nsConsoleMessage(NS_ConvertUTF8toUTF16(formatted.get()).get());
console->LogMessage(error);
}
void LogMessageWithContext(FileLocation& aFile, uint32_t aLineNumber,
const char* aMsg, ...) {
va_list args;
va_start(args, aMsg);
SmprintfPointer formatted(mozilla::Vsmprintf(aMsg, args));
va_end(args);
if (!formatted) {
return;
}
MOZ_ASSERT(nsComponentManagerImpl::gComponentManager);
nsCString file;
aFile.GetURIString(file);
nsCOMPtr<nsIScriptError> error = do_CreateInstance(NS_SCRIPTERROR_CONTRACTID);
if (!error) {
// This can happen early in component registration. Fall back to a
// generic console message.
LogMessage("Warning: in '%s', line %i: %s", file.get(), aLineNumber,
formatted.get());
return;
}
nsCOMPtr<nsIConsoleService> console =
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
if (!console) {
return;
}
nsresult rv = error->Init(NS_ConvertUTF8toUTF16(formatted.get()),
NS_ConvertUTF8toUTF16(file), u""_ns, aLineNumber, 0,
nsIScriptError::warningFlag, "chrome registration",
false /* from private window */,
true /* from chrome context */);
if (NS_FAILED(rv)) {
return;
}
console->LogMessage(error);
}
/**
* Check for a modifier flag of the following forms:
* "flag" (same as "true")
* "flag=yes|true|1"
* "flag="no|false|0"
* @param aFlag The flag to compare.
* @param aData The tokenized data to check; this is lowercased
* before being passed in.
* @param aResult If the flag is found, the value is assigned here.
* @return Whether the flag was handled.
*/
static bool CheckFlag(const nsAString& aFlag, const nsAString& aData,
bool& aResult) {
if (!StringBeginsWith(aData, aFlag)) {
return false;
}
if (aFlag.Length() == aData.Length()) {
// the data is simply "flag", which is the same as "flag=yes"
aResult = true;
return true;
}
if (aData.CharAt(aFlag.Length()) != '=') {
// the data is "flag2=", which is not anything we care about
return false;
}
if (aData.Length() == aFlag.Length() + 1) {
aResult = false;
return true;
}
switch (aData.CharAt(aFlag.Length() + 1)) {
case '1':
case 't': // true
case 'y': // yes
aResult = true;
return true;
case '0':
case 'f': // false
case 'n': // no
aResult = false;
return true;
}
return false;
}
enum TriState { eUnspecified, eBad, eOK };
/**
* Check for a modifier flag of the following form:
* "flag=string"
* "flag!=string"
* @param aFlag The flag to compare.
* @param aData The tokenized data to check; this is lowercased
* before being passed in.
* @param aValue The value that is expected.
* @param aResult If this is "ok" when passed in, this is left alone.
* Otherwise if the flag is found it is set to eBad or eOK.
* @return Whether the flag was handled.
*/
static bool CheckStringFlag(const nsAString& aFlag, const nsAString& aData,
const nsAString& aValue, TriState& aResult) {
if (aData.Length() < aFlag.Length() + 1) {
return false;
}
if (!StringBeginsWith(aData, aFlag)) {
return false;
}
bool comparison = true;
if (aData[aFlag.Length()] != '=') {
if (aData[aFlag.Length()] == '!' && aData.Length() >= aFlag.Length() + 2 &&
aData[aFlag.Length() + 1] == '=') {
comparison = false;
} else {
return false;
}
}
if (aResult != eOK) {
nsDependentSubstring testdata =
Substring(aData, aFlag.Length() + (comparison ? 1 : 2));
if (testdata.Equals(aValue)) {
aResult = comparison ? eOK : eBad;
} else {
aResult = comparison ? eBad : eOK;
}
}
return true;
}
static bool CheckOsFlag(const nsAString& aFlag, const nsAString& aData,
const nsAString& aValue, TriState& aResult) {
bool result = CheckStringFlag(aFlag, aData, aValue, aResult);
#if defined(XP_UNIX) && !defined(XP_DARWIN) && !defined(ANDROID)
if (result && aResult == eBad) {
result = CheckStringFlag(aFlag, aData, u"likeunix"_ns, aResult);
}
#endif
return result;
}
/**
* Check for a modifier flag of the following form:
* "flag=version"
* "flag<=version"
* "flag<version"
* "flag>=version"
* "flag>version"
* @param aFlag The flag to compare.
* @param aData The tokenized data to check; this is lowercased
* before being passed in.
* @param aValue The value that is expected. If this is empty then no
* comparison will match.
* @param aResult If this is eOK when passed in, this is left alone.
* Otherwise if the flag is found it is set to eBad or eOK.
* @return Whether the flag was handled.
*/
#define COMPARE_EQ 1 << 0
#define COMPARE_LT 1 << 1
#define COMPARE_GT 1 << 2
static bool CheckVersionFlag(const nsString& aFlag, const nsString& aData,
const nsString& aValue, TriState& aResult) {
if (aData.Length() < aFlag.Length() + 2) {
return false;
}
if (!StringBeginsWith(aData, aFlag)) {
return false;
}
if (aValue.Length() == 0) {
if (aResult != eOK) {
aResult = eBad;
}
return true;
}
uint32_t comparison;
nsAutoString testdata;
switch (aData[aFlag.Length()]) {
case '=':
comparison = COMPARE_EQ;
testdata = Substring(aData, aFlag.Length() + 1);
break;
case '<':
if (aData[aFlag.Length() + 1] == '=') {
comparison = COMPARE_EQ | COMPARE_LT;
testdata = Substring(aData, aFlag.Length() + 2);
} else {
comparison = COMPARE_LT;
testdata = Substring(aData, aFlag.Length() + 1);
}
break;
case '>':
if (aData[aFlag.Length() + 1] == '=') {
comparison = COMPARE_EQ | COMPARE_GT;
testdata = Substring(aData, aFlag.Length() + 2);
} else {
comparison = COMPARE_GT;
testdata = Substring(aData, aFlag.Length() + 1);
}
break;
default:
return false;
}
if (testdata.Length() == 0) {
return false;
}
if (aResult != eOK) {
int32_t c = mozilla::CompareVersions(NS_ConvertUTF16toUTF8(aValue).get(),
NS_ConvertUTF16toUTF8(testdata).get());
if ((c == 0 && comparison & COMPARE_EQ) ||
(c < 0 && comparison & COMPARE_LT) ||
(c > 0 && comparison & COMPARE_GT)) {
aResult = eOK;
} else {
aResult = eBad;
}
}
return true;
}
// In-place conversion of ascii characters to lower case
static void ToLowerCase(char* aToken) {
for (; *aToken; ++aToken) {
*aToken = NS_ToLower(*aToken);
}
}
namespace {
struct CachedDirective {
int lineno;
char* argv[4];
};
} // namespace
void ParseManifest(NSLocationType aType, FileLocation& aFile, char* aBuf,
bool aChromeOnly) {
nsComponentManagerImpl::ManifestProcessingContext mgrcx(aType, aFile,
aChromeOnly);
nsChromeRegistry::ManifestProcessingContext chromecx(aType, aFile);
nsresult rv;
constexpr auto kContentAccessible = u"contentaccessible"_ns;
constexpr auto kRemoteEnabled = u"remoteenabled"_ns;
constexpr auto kRemoteRequired = u"remoterequired"_ns;
constexpr auto kApplication = u"application"_ns;
constexpr auto kAppVersion = u"appversion"_ns;
constexpr auto kGeckoVersion = u"platformversion"_ns;
constexpr auto kOs = u"os"_ns;
constexpr auto kOsVersion = u"osversion"_ns;
constexpr auto kABI = u"abi"_ns;
constexpr auto kProcess = u"process"_ns;
#if defined(MOZ_WIDGET_ANDROID)
constexpr auto kTablet = u"tablet"_ns;
#endif
// You might expect this to be guarded by MOZ_BACKGROUNDTASKS, but it's not
// possible to have conditional manifest contents, so we need to recognize and
// discard these tokens even when MOZ_BACKGROUNDTASKS is not set.
constexpr auto kBackgroundTask = u"backgroundtask"_ns;
constexpr auto kMain = u"main"_ns;
constexpr auto kContent = u"content"_ns;
// Obsolete
constexpr auto kXPCNativeWrappers = u"xpcnativewrappers"_ns;
nsAutoString appID;
nsAutoString appVersion;
nsAutoString geckoVersion;
nsAutoString osTarget;
nsAutoString abi;
nsAutoString process;
nsCOMPtr<nsIXULAppInfo> xapp(do_GetService(XULAPPINFO_SERVICE_CONTRACTID));
if (xapp) {
nsAutoCString s;
rv = xapp->GetID(s);
if (NS_SUCCEEDED(rv)) {
CopyUTF8toUTF16(s, appID);
}
rv = xapp->GetVersion(s);
if (NS_SUCCEEDED(rv)) {
CopyUTF8toUTF16(s, appVersion);
}
rv = xapp->GetPlatformVersion(s);
if (NS_SUCCEEDED(rv)) {
CopyUTF8toUTF16(s, geckoVersion);
}
nsCOMPtr<nsIXULRuntime> xruntime(do_QueryInterface(xapp));
if (xruntime) {
rv = xruntime->GetOS(s);
if (NS_SUCCEEDED(rv)) {
ToLowerCase(s);
CopyUTF8toUTF16(s, osTarget);
}
rv = xruntime->GetXPCOMABI(s);
if (NS_SUCCEEDED(rv) && osTarget.Length()) {
ToLowerCase(s);
CopyUTF8toUTF16(s, abi);
abi.Insert(char16_t('_'), 0);
abi.Insert(osTarget, 0);
}
}
}
nsAutoString osVersion;
#if defined(XP_WIN)
# pragma warning(push)
# pragma warning(disable : 4996) // VC12+ deprecates GetVersionEx
OSVERSIONINFO info = {sizeof(OSVERSIONINFO)};
if (GetVersionEx(&info)) {
nsTextFormatter::ssprintf(osVersion, u"%ld.%ld", info.dwMajorVersion,
info.dwMinorVersion);
}
# pragma warning(pop)
#elif defined(MOZ_WIDGET_COCOA)
SInt32 majorVersion = nsCocoaFeatures::macOSVersionMajor();
SInt32 minorVersion = nsCocoaFeatures::macOSVersionMinor();
nsTextFormatter::ssprintf(osVersion, u"%ld.%ld", majorVersion, minorVersion);
#elif defined(MOZ_WIDGET_GTK)
nsTextFormatter::ssprintf(osVersion, u"%ld.%ld", gtk_major_version,
gtk_minor_version);
#elif defined(MOZ_WIDGET_ANDROID)
bool isTablet = false;
if (mozilla::AndroidBridge::Bridge()) {
mozilla::AndroidBridge::Bridge()->GetStaticStringField(
"android/os/Build$VERSION", "RELEASE", osVersion);
isTablet = java::GeckoAppShell::IsTablet();
}
#endif
if (XRE_IsContentProcess()) {
process = kContent;
} else {
process = kMain;
}
// Because contracts must be registered after CIDs, we save and process them
// at the end.
nsTArray<CachedDirective> contracts;
char* token;
char* newline = aBuf;
uint32_t line = 0;
// outer loop tokenizes by newline
while (*newline) {
while (*newline && IsNewline(*newline)) {
++newline;
++line;
}
if (!*newline) {
break;
}
token = newline;
while (*newline && !IsNewline(*newline)) {
++newline;
}
if (*newline) {
*newline = '\0';
++newline;
}
++line;
if (*token == '#') { // ignore lines that begin with # as comments
continue;
}
char* whitespace = token;
token = nsCRT::strtok(whitespace, kWhitespace, &whitespace);
if (!token) {
continue;
}
const ManifestDirective* directive = nullptr;
for (const ManifestDirective* d = kParsingTable;
d < ArrayEnd(kParsingTable); ++d) {
if (!strcmp(d->directive, token)) {
directive = d;
break;
}
}
if (!directive) {
LogMessageWithContext(
aFile, line, "Ignoring unrecognized chrome manifest directive '%s'.",
token);
continue;
}
if (!directive->ischrome && NS_BOOTSTRAPPED_LOCATION == aType) {
LogMessageWithContext(
aFile, line,
"Bootstrapped manifest not allowed to use '%s' directive.", token);
continue;
}
NS_ASSERTION(directive->argc < 4, "Need to reset argv array length");
char* argv[4];
for (int i = 0; i < directive->argc; ++i) {
argv[i] = nsCRT::strtok(whitespace, kWhitespace, &whitespace);
}
if (!argv[directive->argc - 1]) {
LogMessageWithContext(aFile, line,
"Not enough arguments for chrome manifest "
"directive '%s', expected %i.",
token, directive->argc);
continue;
}
bool ok = true;
TriState stAppVersion = eUnspecified;
TriState stGeckoVersion = eUnspecified;
TriState stApp = eUnspecified;
TriState stOsVersion = eUnspecified;
TriState stOs = eUnspecified;
TriState stABI = eUnspecified;
TriState stProcess = eUnspecified;
#if defined(MOZ_WIDGET_ANDROID)
TriState stTablet = eUnspecified;
#endif
#ifdef MOZ_BACKGROUNDTASKS
// When in background task mode, default to not registering
// category directivies unless backgroundtask=1 is specified.
TriState stBackgroundTask = (BackgroundTasks::IsBackgroundTaskMode() &&
strcmp("category", directive->directive) == 0)
? eBad
: eUnspecified;
#endif
int flags = 0;
while ((token = nsCRT::strtok(whitespace, kWhitespace, &whitespace)) &&
ok) {
ToLowerCase(token);
NS_ConvertASCIItoUTF16 wtoken(token);
if (CheckStringFlag(kApplication, wtoken, appID, stApp) ||
CheckOsFlag(kOs, wtoken, osTarget, stOs) ||
CheckStringFlag(kABI, wtoken, abi, stABI) ||
CheckStringFlag(kProcess, wtoken, process, stProcess) ||
CheckVersionFlag(kOsVersion, wtoken, osVersion, stOsVersion) ||
CheckVersionFlag(kAppVersion, wtoken, appVersion, stAppVersion) ||
CheckVersionFlag(kGeckoVersion, wtoken, geckoVersion,
stGeckoVersion)) {
continue;
}
#if defined(MOZ_WIDGET_ANDROID)
bool tablet = false;
if (CheckFlag(kTablet, wtoken, tablet)) {
stTablet = (tablet == isTablet) ? eOK : eBad;
continue;
}
#endif
// You might expect this to be guarded by MOZ_BACKGROUNDTASKS, it's not
// possible to have conditional manifest contents.
bool flag;
if (CheckFlag(kBackgroundTask, wtoken, flag)) {
#if defined(MOZ_BACKGROUNDTASKS)
// Background task mode is active: filter.
stBackgroundTask =
(flag == BackgroundTasks::IsBackgroundTaskMode()) ? eOK : eBad;
#endif /* defined(MOZ_BACKGROUNDTASKS) */
continue;
}
if (directive->contentflags) {
bool flag;
if (CheckFlag(kContentAccessible, wtoken, flag)) {
if (flag) flags |= nsChromeRegistry::CONTENT_ACCESSIBLE;
continue;
}
if (CheckFlag(kRemoteEnabled, wtoken, flag)) {
if (flag) flags |= nsChromeRegistry::REMOTE_ALLOWED;
continue;
}
if (CheckFlag(kRemoteRequired, wtoken, flag)) {
if (flag) flags |= nsChromeRegistry::REMOTE_REQUIRED;
continue;
}
}
bool xpcNativeWrappers = true; // Dummy for CheckFlag.
if (CheckFlag(kXPCNativeWrappers, wtoken, xpcNativeWrappers)) {
LogMessageWithContext(
aFile, line, "Ignoring obsolete chrome registration modifier '%s'.",
token);
continue;
}
LogMessageWithContext(
aFile, line, "Unrecognized chrome manifest modifier '%s'.", token);
ok = false;
}
if (!ok || stApp == eBad || stAppVersion == eBad ||
stGeckoVersion == eBad || stOs == eBad || stOsVersion == eBad ||
#ifdef MOZ_WIDGET_ANDROID
stTablet == eBad ||
#endif
#ifdef MOZ_BACKGROUNDTASKS
stBackgroundTask == eBad ||
#endif
stABI == eBad || stProcess == eBad) {
continue;
}
if (directive->regfunc) {
if (GeckoProcessType_Default != XRE_GetProcessType()) {
continue;
}
if (!nsChromeRegistry::gChromeRegistry) {
nsCOMPtr<nsIChromeRegistry> cr = mozilla::services::GetChromeRegistry();
if (!nsChromeRegistry::gChromeRegistry) {
LogMessageWithContext(aFile, line,
"Chrome registry isn't available yet.");
continue;
}
}
(nsChromeRegistry::gChromeRegistry->*(directive->regfunc))(chromecx, line,
argv, flags);
} else if (directive->ischrome || !aChromeOnly) {
(nsComponentManagerImpl::gComponentManager->*(directive->mgrfunc))(
mgrcx, line, argv);
}
}
for (uint32_t i = 0; i < contracts.Length(); ++i) {
CachedDirective& d = contracts[i];
nsComponentManagerImpl::gComponentManager->ManifestContract(mgrcx, d.lineno,
d.argv);
}
}