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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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 "nsNSSComponent.h"
#include "BinaryPath.h"
#include "CryptoTask.h"
#include "EnterpriseRoots.h"
#include "ExtendedValidation.h"
#include "NSSCertDBTrustDomain.h"
#include "SSLTokensCache.h"
#include "ScopedNSSTypes.h"
#include "SharedSSLState.h"
#include "cert.h"
#include "cert_storage/src/cert_storage.h"
#include "certdb.h"
#include "mozilla/AppShutdown.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/Assertions.h"
#include "mozilla/Casting.h"
#include "mozilla/EndianUtils.h"
#include "mozilla/FilePreferences.h"
#include "mozilla/PodOperations.h"
#include "mozilla/Preferences.h"
#include "mozilla/ProfilerLabels.h"
#include "mozilla/ProfilerMarkers.h"
#include "mozilla/PublicSSL.h"
#include "mozilla/ScopeExit.h"
#include "mozilla/Services.h"
#include "mozilla/StaticMutex.h"
#include "mozilla/StaticPrefs_security.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/SyncRunnable.h"
#include "mozilla/Telemetry.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/Unused.h"
#include "mozilla/Vector.h"
#include "mozilla/net/SocketProcessParent.h"
#include "mozpkix/pkixnss.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsCRT.h"
#include "nsClientAuthRemember.h"
#include "nsComponentManagerUtils.h"
#include "nsDirectoryServiceDefs.h"
#include "nsICertOverrideService.h"
#include "nsIFile.h"
#include "nsILocalFileWin.h"
#include "nsIOService.h"
#include "nsIObserverService.h"
#include "nsIPrompt.h"
#include "nsIProperties.h"
#include "nsISerialEventTarget.h"
#include "nsISiteSecurityService.h"
#include "nsITimer.h"
#include "nsITokenPasswordDialogs.h"
#include "nsIWindowWatcher.h"
#include "nsIXULRuntime.h"
#include "nsLiteralString.h"
#include "nsNSSCertificateDB.h"
#include "nsNSSHelper.h"
#include "nsNetCID.h"
#include "nsPK11TokenDB.h"
#include "nsPrintfCString.h"
#include "nsServiceManagerUtils.h"
#include "nsThreadUtils.h"
#include "nsXULAppAPI.h"
#include "nss.h"
#include "p12plcy.h"
#include "pk11pub.h"
#include "prmem.h"
#include "secerr.h"
#include "secmod.h"
#include "ssl.h"
#include "sslerr.h"
#include "sslproto.h"
#if defined(XP_LINUX) && !defined(ANDROID)
# include <linux/magic.h>
# include <sys/vfs.h>
#endif
#ifdef XP_WIN
# include "mozilla/WindowsVersion.h"
# include "nsILocalFileWin.h"
# include "windows.h" // this needs to be before the following includes
# include "lmcons.h"
# include "sddl.h"
# include "wincrypt.h"
# include "nsIWindowsRegKey.h"
#endif
using namespace mozilla;
using namespace mozilla::psm;
LazyLogModule gPIPNSSLog("pipnss");
int nsNSSComponent::mInstanceCount = 0;
// Forward declaration.
nsresult CommonInit();
// Take an nsIFile and get a UTF-8-encoded c-string representation of the
// location of that file (encapsulated in an nsACString).
// This operation is generally to be avoided, except when interacting with
// third-party or legacy libraries that cannot handle `nsIFile`s (such as NSS).
// |result| is encoded in UTF-8.
nsresult FileToCString(const nsCOMPtr<nsIFile>& file, nsACString& result) {
#ifdef XP_WIN
nsAutoString path;
nsresult rv = file->GetPath(path);
if (NS_SUCCEEDED(rv)) {
CopyUTF16toUTF8(path, result);
}
return rv;
#else
return file->GetNativePath(result);
#endif
}
void TruncateFromLastDirectorySeparator(nsCString& path) {
static const nsAutoCString kSeparatorString(
mozilla::FilePreferences::kPathSeparator);
int32_t index = path.RFind(kSeparatorString);
if (index == kNotFound) {
return;
}
path.Truncate(index);
}
bool LoadIPCClientCerts() {
// This returns the path to the binary currently running, which in most
// cases is "plugin-container".
UniqueFreePtr<char> pluginContainerPath(BinaryPath::Get());
if (!pluginContainerPath) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("failed to get get plugin-container path"));
return false;
}
nsAutoCString ipcClientCertsDirString(pluginContainerPath.get());
// On most platforms, ipcclientcerts is in the same directory as
// plugin-container. To obtain the path to that directory, truncate from
// the last directory separator.
// On macOS, plugin-container is in
// Firefox.app/Contents/MacOS/plugin-container.app/Contents/MacOS/,
// whereas ipcclientcerts is in Firefox.app/Contents/MacOS/. Consequently,
// this truncation from the last directory separator has to happen 4 times
// total. Normally this would be done using nsIFile APIs, but due to when
// this is initialized in the socket process, those aren't available.
TruncateFromLastDirectorySeparator(ipcClientCertsDirString);
#ifdef XP_MACOSX
TruncateFromLastDirectorySeparator(ipcClientCertsDirString);
TruncateFromLastDirectorySeparator(ipcClientCertsDirString);
TruncateFromLastDirectorySeparator(ipcClientCertsDirString);
#endif
if (!LoadIPCClientCertsModule(ipcClientCertsDirString)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("failed to load ipcclientcerts from '%s'",
ipcClientCertsDirString.get()));
return false;
}
return true;
}
// This function can be called from chrome or content or socket processes
// to ensure that NSS is initialized.
bool EnsureNSSInitializedChromeOrContent() {
static Atomic<bool> initialized(false);
if (initialized) {
return true;
}
// If this is not the main thread (i.e. probably a worker) then forward this
// call to the main thread.
if (!NS_IsMainThread()) {
nsCOMPtr<nsIThread> mainThread;
nsresult rv = NS_GetMainThread(getter_AddRefs(mainThread));
if (NS_FAILED(rv)) {
return false;
}
// Forward to the main thread synchronously.
mozilla::SyncRunnable::DispatchToThread(
mainThread, new SyncRunnable(NS_NewRunnableFunction(
"EnsureNSSInitializedChromeOrContent",
[]() { EnsureNSSInitializedChromeOrContent(); })));
return initialized;
}
if (XRE_IsParentProcess()) {
nsCOMPtr<nsISupports> nss = do_GetService(PSM_COMPONENT_CONTRACTID);
if (!nss) {
return false;
}
initialized = true;
return true;
}
if (NSS_IsInitialized()) {
initialized = true;
return true;
}
if (NSS_NoDB_Init(nullptr) != SECSuccess) {
return false;
}
if (XRE_IsSocketProcess()) {
if (NS_FAILED(CommonInit())) {
return false;
}
// If ipcclientcerts fails to load, client certificate authentication won't
// work (if networking is done on the socket process). This is preferable
// to stopping the program entirely, so treat this as best-effort.
Unused << NS_WARN_IF(!LoadIPCClientCerts());
initialized = true;
return true;
}
if (NS_FAILED(mozilla::psm::InitializeCipherSuite())) {
return false;
}
mozilla::psm::DisableMD5();
mozilla::pkix::RegisterErrorTable();
initialized = true;
return true;
}
static const uint32_t OCSP_TIMEOUT_MILLISECONDS_SOFT_MAX = 5000;
static const uint32_t OCSP_TIMEOUT_MILLISECONDS_HARD_MAX = 20000;
void nsNSSComponent::GetRevocationBehaviorFromPrefs(
/*out*/ CertVerifier::OcspDownloadConfig* odc,
/*out*/ CertVerifier::OcspStrictConfig* osc,
/*out*/ uint32_t* certShortLifetimeInDays,
/*out*/ TimeDuration& softTimeout,
/*out*/ TimeDuration& hardTimeout) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(odc);
MOZ_ASSERT(osc);
MOZ_ASSERT(certShortLifetimeInDays);
// 0 = disabled
// 1 = enabled for everything (default)
// 2 = enabled for EV certificates only
uint32_t ocspLevel = StaticPrefs::security_OCSP_enabled();
switch (ocspLevel) {
case 0:
*odc = CertVerifier::ocspOff;
break;
case 2:
*odc = CertVerifier::ocspEVOnly;
break;
default:
*odc = CertVerifier::ocspOn;
break;
}
*osc = StaticPrefs::security_OCSP_require() ? CertVerifier::ocspStrict
: CertVerifier::ocspRelaxed;
*certShortLifetimeInDays =
StaticPrefs::security_pki_cert_short_lifetime_in_days();
uint32_t softTimeoutMillis =
StaticPrefs::security_OCSP_timeoutMilliseconds_soft();
softTimeoutMillis =
std::min(softTimeoutMillis, OCSP_TIMEOUT_MILLISECONDS_SOFT_MAX);
softTimeout = TimeDuration::FromMilliseconds(softTimeoutMillis);
uint32_t hardTimeoutMillis =
StaticPrefs::security_OCSP_timeoutMilliseconds_hard();
hardTimeoutMillis =
std::min(hardTimeoutMillis, OCSP_TIMEOUT_MILLISECONDS_HARD_MAX);
hardTimeout = TimeDuration::FromMilliseconds(hardTimeoutMillis);
}
nsNSSComponent::nsNSSComponent()
: mLoadableCertsLoadedMonitor("nsNSSComponent.mLoadableCertsLoadedMonitor"),
mLoadableCertsLoaded(false),
mLoadableCertsLoadedResult(NS_ERROR_FAILURE),
mMutex("nsNSSComponent.mMutex"),
mMitmDetecionEnabled(false),
mLoadLoadableCertsTaskDispatched(false) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("nsNSSComponent::ctor\n"));
MOZ_RELEASE_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mInstanceCount == 0,
"nsNSSComponent is a singleton, but instantiated multiple times!");
++mInstanceCount;
}
nsNSSComponent::~nsNSSComponent() {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("nsNSSComponent::dtor\n"));
MOZ_RELEASE_ASSERT(NS_IsMainThread());
// All cleanup code requiring services needs to happen in xpcom_shutdown
ShutdownNSS();
SharedSSLState::GlobalCleanup();
RememberCertErrorsTable::Cleanup();
--mInstanceCount;
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("nsNSSComponent::dtor finished\n"));
}
#ifdef XP_WIN
static bool GetUserSid(nsAString& sidString) {
// UNLEN is the maximum user name length (see Lmcons.h). +1 for the null
// terminator.
WCHAR lpAccountName[UNLEN + 1];
DWORD lcAccountName = sizeof(lpAccountName) / sizeof(lpAccountName[0]);
BOOL success = GetUserName(lpAccountName, &lcAccountName);
if (!success) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("GetUserName failed"));
return false;
}
char sid_buffer[SECURITY_MAX_SID_SIZE];
SID* sid = BitwiseCast<SID*, char*>(sid_buffer);
DWORD cbSid = ArrayLength(sid_buffer);
SID_NAME_USE eUse;
// There doesn't appear to be a defined maximum length for the domain name
// here. To deal with this, we start with a reasonable buffer length and
// see if that works. If it fails and the error indicates insufficient length,
// we use the indicated required length and try again.
DWORD cchReferencedDomainName = 128;
auto ReferencedDomainName(MakeUnique<WCHAR[]>(cchReferencedDomainName));
success = LookupAccountName(nullptr, lpAccountName, sid, &cbSid,
ReferencedDomainName.get(),
&cchReferencedDomainName, &eUse);
if (!success && GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("LookupAccountName failed"));
return false;
}
if (!success) {
ReferencedDomainName = MakeUnique<WCHAR[]>(cchReferencedDomainName);
success = LookupAccountName(nullptr, lpAccountName, sid, &cbSid,
ReferencedDomainName.get(),
&cchReferencedDomainName, &eUse);
}
if (!success) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("LookupAccountName failed"));
return false;
}
LPTSTR StringSid;
success = ConvertSidToStringSid(sid, &StringSid);
if (!success) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("ConvertSidToStringSid failed"));
return false;
}
sidString.Assign(StringSid);
LocalFree(StringSid);
return true;
}
// This is a specialized helper function to read the value of a registry key
// that might not be present. If it is present, returns (via the output
// parameter) its value. Otherwise, returns the given default value.
// This function handles one level of nesting. That is, if the desired value
// is actually in a direct child of the given registry key (where the child
// and/or the value being sought may not actually be present), this function
// will handle that. In the normal case, though, optionalChildName will be
// null.
static nsresult ReadRegKeyValueWithDefault(nsCOMPtr<nsIWindowsRegKey> regKey,
uint32_t flags,
const wchar_t* optionalChildName,
const wchar_t* valueName,
uint32_t defaultValue,
uint32_t& valueOut) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("ReadRegKeyValueWithDefault"));
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("attempting to read '%S%s%S' with default '%u'",
optionalChildName ? optionalChildName : L"",
optionalChildName ? "\\" : "", valueName, defaultValue));
if (optionalChildName) {
nsDependentString childNameString(optionalChildName);
bool hasChild;
nsresult rv = regKey->HasChild(childNameString, &hasChild);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("failed to determine if child key is present"));
return rv;
}
if (!hasChild) {
valueOut = defaultValue;
return NS_OK;
}
nsCOMPtr<nsIWindowsRegKey> childRegKey;
rv = regKey->OpenChild(childNameString, flags, getter_AddRefs(childRegKey));
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("couldn't open child key"));
return rv;
}
return ReadRegKeyValueWithDefault(childRegKey, flags, nullptr, valueName,
defaultValue, valueOut);
}
nsDependentString valueNameString(valueName);
bool hasValue;
nsresult rv = regKey->HasValue(valueNameString, &hasValue);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("failed to determine if value is present"));
return rv;
}
if (!hasValue) {
valueOut = defaultValue;
return NS_OK;
}
rv = regKey->ReadIntValue(valueNameString, &valueOut);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("failed to read value"));
return rv;
}
return NS_OK;
}
static nsresult AccountHasFamilySafetyEnabled(bool& enabled) {
enabled = false;
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("AccountHasFamilySafetyEnabled?"));
nsCOMPtr<nsIWindowsRegKey> parentalControlsKey(
do_CreateInstance("@mozilla.org/windows-registry-key;1"));
if (!parentalControlsKey) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("couldn't create nsIWindowsRegKey"));
return NS_ERROR_FAILURE;
}
uint32_t flags = nsIWindowsRegKey::ACCESS_READ | nsIWindowsRegKey::WOW64_64;
constexpr auto familySafetyPath =
u"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Parental Controls"_ns;
nsresult rv = parentalControlsKey->Open(
nsIWindowsRegKey::ROOT_KEY_LOCAL_MACHINE, familySafetyPath, flags);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("couldn't open parentalControlsKey"));
return rv;
}
constexpr auto usersString = u"Users"_ns;
bool hasUsers;
rv = parentalControlsKey->HasChild(usersString, &hasUsers);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("HasChild(Users) failed"));
return rv;
}
if (!hasUsers) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("Users subkey not present - Parental Controls not enabled"));
return NS_OK;
}
nsCOMPtr<nsIWindowsRegKey> usersKey;
rv = parentalControlsKey->OpenChild(usersString, flags,
getter_AddRefs(usersKey));
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("failed to open Users subkey"));
return rv;
}
nsAutoString sid;
if (!GetUserSid(sid)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("couldn't get sid"));
return NS_ERROR_FAILURE;
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("our sid is '%S'", static_cast<const wchar_t*>(sid.get())));
bool hasSid;
rv = usersKey->HasChild(sid, &hasSid);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("HasChild(sid) failed"));
return rv;
}
if (!hasSid) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("sid not present in Family Safety Users"));
return NS_OK;
}
nsCOMPtr<nsIWindowsRegKey> sidKey;
rv = usersKey->OpenChild(sid, flags, getter_AddRefs(sidKey));
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("couldn't open sid key"));
return rv;
}
// There are three keys we're interested in: "Parental Controls On",
// "Logging Required", and "Web\\Filter On". These keys will have value 0
// or 1, indicating a particular feature is disabled or enabled,
// respectively. So, if "Parental Controls On" is not 1, Family Safety is
// disabled and we don't care about anything else. If both "Logging
// Required" and "Web\\Filter On" are 0, the proxy will not be running,
// so for our purposes we can consider Family Safety disabled in that
// case.
// By default, "Logging Required" is 1 and "Web\\Filter On" is 0,
// reflecting the initial settings when Family Safety is enabled for an
// account for the first time, However, these sub-keys are not created
// unless they are switched away from the default value.
uint32_t parentalControlsOn;
rv = sidKey->ReadIntValue(u"Parental Controls On"_ns, &parentalControlsOn);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("couldn't read Parental Controls On"));
return rv;
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("Parental Controls On: %u", parentalControlsOn));
if (parentalControlsOn != 1) {
return NS_OK;
}
uint32_t loggingRequired;
rv = ReadRegKeyValueWithDefault(sidKey, flags, nullptr, L"Logging Required",
1, loggingRequired);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("failed to read value of Logging Required"));
return rv;
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("Logging Required: %u", loggingRequired));
uint32_t webFilterOn;
rv = ReadRegKeyValueWithDefault(sidKey, flags, L"Web", L"Filter On", 0,
webFilterOn);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("failed to read value of Web\\Filter On"));
return rv;
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("Web\\Filter On: %u", webFilterOn));
enabled = loggingRequired == 1 || webFilterOn == 1;
return NS_OK;
}
#endif // XP_WIN
bool nsNSSComponent::ShouldEnableEnterpriseRootsForFamilySafety(
uint32_t familySafetyMode) {
#ifdef XP_WIN
if (!(IsWin8Point1OrLater() && !IsWin10OrLater())) {
return false;
}
if (familySafetyMode != 2) {
return false;
}
bool familySafetyEnabled;
nsresult rv = AccountHasFamilySafetyEnabled(familySafetyEnabled);
if (NS_FAILED(rv)) {
return false;
}
return familySafetyEnabled;
#else
return false;
#endif // XP_WIN
}
void nsNSSComponent::UnloadEnterpriseRoots() {
MOZ_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return;
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("UnloadEnterpriseRoots"));
MutexAutoLock lock(mMutex);
mEnterpriseCerts.clear();
setValidationOptions(false, lock);
ClearSSLExternalAndInternalSessionCache();
}
class BackgroundImportEnterpriseCertsTask final : public CryptoTask {
public:
explicit BackgroundImportEnterpriseCertsTask(nsNSSComponent* nssComponent)
: mNSSComponent(nssComponent) {}
private:
virtual nsresult CalculateResult() override {
mNSSComponent->ImportEnterpriseRoots();
mNSSComponent->UpdateCertVerifierWithEnterpriseRoots();
return NS_OK;
}
virtual void CallCallback(nsresult rv) override {
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->NotifyObservers(nullptr, "psm:enterprise-certs-imported",
nullptr);
}
}
RefPtr<nsNSSComponent> mNSSComponent;
};
void nsNSSComponent::MaybeImportEnterpriseRoots() {
MOZ_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return;
}
bool importEnterpriseRoots = StaticPrefs::security_enterprise_roots_enabled();
uint32_t familySafetyMode = StaticPrefs::security_family_safety_mode();
// If we've been configured to detect the Family Safety TLS interception
// feature, see if it's enabled. If so, we want to import enterprise roots.
if (ShouldEnableEnterpriseRootsForFamilySafety(familySafetyMode)) {
importEnterpriseRoots = true;
}
if (importEnterpriseRoots) {
RefPtr<BackgroundImportEnterpriseCertsTask> task =
new BackgroundImportEnterpriseCertsTask(this);
Unused << task->Dispatch();
}
}
void nsNSSComponent::ImportEnterpriseRoots() {
MOZ_ASSERT(!NS_IsMainThread());
if (NS_IsMainThread()) {
return;
}
Vector<EnterpriseCert> enterpriseCerts;
nsresult rv = GatherEnterpriseCerts(enterpriseCerts);
if (NS_SUCCEEDED(rv)) {
MutexAutoLock lock(mMutex);
mEnterpriseCerts = std::move(enterpriseCerts);
} else {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("failed gathering enterprise roots"));
}
}
nsresult nsNSSComponent::CommonGetEnterpriseCerts(
nsTArray<nsTArray<uint8_t>>& enterpriseCerts, bool getRoots) {
nsresult rv = BlockUntilLoadableCertsLoaded();
if (NS_FAILED(rv)) {
return rv;
}
MutexAutoLock nsNSSComponentLock(mMutex);
enterpriseCerts.Clear();
for (const auto& cert : mEnterpriseCerts) {
nsTArray<uint8_t> certCopy;
// mEnterpriseCerts includes both roots and intermediates.
if (cert.GetIsRoot() == getRoots) {
nsresult rv = cert.CopyBytes(certCopy);
if (NS_FAILED(rv)) {
return rv;
}
// XXX(Bug 1631371) Check if this should use a fallible operation as it
// pretended earlier.
enterpriseCerts.AppendElement(std::move(certCopy));
}
}
return NS_OK;
}
NS_IMETHODIMP
nsNSSComponent::GetEnterpriseRoots(
nsTArray<nsTArray<uint8_t>>& enterpriseRoots) {
return CommonGetEnterpriseCerts(enterpriseRoots, true);
}
NS_IMETHODIMP
nsNSSComponent::GetEnterpriseIntermediates(
nsTArray<nsTArray<uint8_t>>& enterpriseIntermediates) {
return CommonGetEnterpriseCerts(enterpriseIntermediates, false);
}
NS_IMETHODIMP
nsNSSComponent::AddEnterpriseIntermediate(
const nsTArray<uint8_t>& intermediateBytes) {
nsresult rv = BlockUntilLoadableCertsLoaded();
if (NS_FAILED(rv)) {
return rv;
}
EnterpriseCert intermediate;
rv = intermediate.Init(intermediateBytes.Elements(),
intermediateBytes.Length(), false);
if (NS_FAILED(rv)) {
return rv;
}
{
MutexAutoLock nsNSSComponentLock(mMutex);
if (!mEnterpriseCerts.append(std::move(intermediate))) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
UpdateCertVerifierWithEnterpriseRoots();
return NS_OK;
}
class LoadLoadableCertsTask final : public Runnable {
public:
LoadLoadableCertsTask(nsNSSComponent* nssComponent,
bool importEnterpriseRoots, uint32_t familySafetyMode,
Vector<nsCString>&& possibleLoadableRootsLocations,
Maybe<nsCString>&& osClientCertsModuleLocation)
: Runnable("LoadLoadableCertsTask"),
mNSSComponent(nssComponent),
mImportEnterpriseRoots(importEnterpriseRoots),
mFamilySafetyMode(familySafetyMode),
mPossibleLoadableRootsLocations(
std::move(possibleLoadableRootsLocations)),
mOSClientCertsModuleLocation(std::move(osClientCertsModuleLocation)) {
MOZ_ASSERT(nssComponent);
}
~LoadLoadableCertsTask() = default;
nsresult Dispatch();
private:
NS_IMETHOD Run() override;
nsresult LoadLoadableRoots();
RefPtr<nsNSSComponent> mNSSComponent;
bool mImportEnterpriseRoots;
uint32_t mFamilySafetyMode;
Vector<nsCString> mPossibleLoadableRootsLocations; // encoded in UTF-8
Maybe<nsCString> mOSClientCertsModuleLocation; // encoded in UTF-8
};
nsresult LoadLoadableCertsTask::Dispatch() {
// The stream transport service (note: not the socket transport service) can
// be used to perform background tasks or I/O that would otherwise block the
// main thread.
nsCOMPtr<nsIEventTarget> target(
do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID));
if (!target) {
return NS_ERROR_FAILURE;
}
return target->Dispatch(this, NS_DISPATCH_NORMAL);
}
NS_IMETHODIMP
LoadLoadableCertsTask::Run() {
Telemetry::AutoScalarTimer<Telemetry::ScalarID::NETWORKING_LOADING_CERTS_TASK>
timer;
nsresult loadLoadableRootsResult = LoadLoadableRoots();
if (NS_WARN_IF(NS_FAILED(loadLoadableRootsResult))) {
MOZ_LOG(gPIPNSSLog, LogLevel::Error, ("LoadLoadableRoots failed"));
// We don't return loadLoadableRootsResult here because then
// BlockUntilLoadableCertsLoaded will just wait forever. Instead we'll save
// its value (below) so we can inform code that relies on the roots module
// being present that loading it failed.
}
// Loading EV information will only succeed if we've successfully loaded the
// loadable roots module.
if (NS_SUCCEEDED(loadLoadableRootsResult)) {
if (NS_FAILED(LoadExtendedValidationInfo())) {
// This isn't a show-stopper in the same way that failing to load the
// roots module is.
MOZ_LOG(gPIPNSSLog, LogLevel::Error, ("failed to load EV info"));
}
}
// If we've been configured to detect the Family Safety TLS interception
// feature, see if it's enabled. If so, we want to import enterprise roots.
if (mNSSComponent->ShouldEnableEnterpriseRootsForFamilySafety(
mFamilySafetyMode)) {
mImportEnterpriseRoots = true;
}
if (mImportEnterpriseRoots) {
mNSSComponent->ImportEnterpriseRoots();
mNSSComponent->UpdateCertVerifierWithEnterpriseRoots();
}
if (mOSClientCertsModuleLocation.isSome()) {
bool success = LoadOSClientCertsModule(*mOSClientCertsModuleLocation);
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("loading OS client certs module %s",
success ? "succeeded" : "failed"));
}
{
MonitorAutoLock rootsLoadedLock(mNSSComponent->mLoadableCertsLoadedMonitor);
mNSSComponent->mLoadableCertsLoaded = true;
// Cache the result of LoadLoadableRoots so BlockUntilLoadableCertsLoaded
// can return it to all callers later (we use that particular result because
// if that operation fails, it's unlikely that any TLS connection will
// succeed whereas the browser may still be able to operate if the other
// tasks fail).
mNSSComponent->mLoadableCertsLoadedResult = loadLoadableRootsResult;
mNSSComponent->mLoadableCertsLoadedMonitor.NotifyAll();
}
return NS_OK;
}
// Returns by reference the path to the desired directory, based on the current
// settings in the directory service.
// |result| is encoded in UTF-8.
static nsresult GetDirectoryPath(const char* directoryKey, nsCString& result) {
MOZ_ASSERT(NS_IsMainThread());
nsCOMPtr<nsIProperties> directoryService(
do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID));
if (!directoryService) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("could not get directory service"));
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIFile> directory;
nsresult rv = directoryService->Get(directoryKey, NS_GET_IID(nsIFile),
getter_AddRefs(directory));
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("could not get '%s' from directory service", directoryKey));
return rv;
}
return FileToCString(directory, result);
}
class BackgroundLoadOSClientCertsModuleTask final : public CryptoTask {
public:
explicit BackgroundLoadOSClientCertsModuleTask(const nsCString&& libraryDir)
: mLibraryDir(std::move(libraryDir)) {}
private:
virtual nsresult CalculateResult() override {
bool success = LoadOSClientCertsModule(mLibraryDir);
return success ? NS_OK : NS_ERROR_FAILURE;
}
virtual void CallCallback(nsresult rv) override {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("loading OS client certs module %s",
NS_SUCCEEDED(rv) ? "succeeded" : "failed"));
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->NotifyObservers(
nullptr, "psm:load-os-client-certs-module-task-ran", nullptr);
}
}
nsCString mLibraryDir;
};
void AsyncLoadOrUnloadOSClientCertsModule(bool load) {
if (load) {
nsCString libraryDir;
nsresult rv = GetDirectoryPath(NS_GRE_BIN_DIR, libraryDir);
if (NS_FAILED(rv)) {
return;
}
RefPtr<BackgroundLoadOSClientCertsModuleTask> task =
new BackgroundLoadOSClientCertsModuleTask(std::move(libraryDir));
Unused << task->Dispatch();
} else {
UniqueSECMODModule osClientCertsModule(
SECMOD_FindModule(kOSClientCertsModuleName));
if (osClientCertsModule) {
SECMOD_UnloadUserModule(osClientCertsModule.get());
}
}
}
NS_IMETHODIMP
nsNSSComponent::HasActiveSmartCards(bool* result) {
NS_ENSURE_ARG_POINTER(result);
BlockUntilLoadableCertsLoaded();
#ifndef MOZ_NO_SMART_CARDS
AutoSECMODListReadLock secmodLock;
SECMODModuleList* list = SECMOD_GetDefaultModuleList();
while (list) {
SECMODModule* module = list->module;
if (SECMOD_LockedModuleHasRemovableSlots(module)) {
*result = true;
return NS_OK;
}
for (int i = 0; i < module->slotCount; i++) {
if (!PK11_IsFriendly(module->slots[i])) {
*result = true;
return NS_OK;
}
}
list = list->next;
}
#endif
*result = false;
return NS_OK;
}
NS_IMETHODIMP
nsNSSComponent::HasUserCertsInstalled(bool* result) {
NS_ENSURE_ARG_POINTER(result);
// FindClientCertificatesWithPrivateKeys won't ever return an empty list, so
// all we need to do is check if this is null or not.
UniqueCERTCertList certList(FindClientCertificatesWithPrivateKeys());
*result = !!certList;
return NS_OK;
}
nsresult nsNSSComponent::BlockUntilLoadableCertsLoaded() {
MonitorAutoLock rootsLoadedLock(mLoadableCertsLoadedMonitor);
while (!mLoadableCertsLoaded) {
rootsLoadedLock.Wait();
}
MOZ_ASSERT(mLoadableCertsLoaded);
return mLoadableCertsLoadedResult;
}
#ifndef MOZ_NO_SMART_CARDS
static StaticMutex sCheckForSmartCardChangesMutex MOZ_UNANNOTATED;
static TimeStamp sLastCheckedForSmartCardChanges = TimeStamp::Now();
#endif
nsresult nsNSSComponent::CheckForSmartCardChanges() {
#ifndef MOZ_NO_SMART_CARDS
{
StaticMutexAutoLock lock(sCheckForSmartCardChangesMutex);
// Do this at most once every 3 seconds.
TimeStamp now = TimeStamp::Now();
if (now - sLastCheckedForSmartCardChanges <
TimeDuration::FromSeconds(3.0)) {
return NS_OK;
}
sLastCheckedForSmartCardChanges = now;
}
// SECMOD_UpdateSlotList attempts to acquire the list lock as well, so we
// have to do this in three steps.
Vector<UniqueSECMODModule> modulesWithRemovableSlots;
{
AutoSECMODListReadLock secmodLock;
SECMODModuleList* list = SECMOD_GetDefaultModuleList();
while (list) {
if (SECMOD_LockedModuleHasRemovableSlots(list->module)) {
UniqueSECMODModule module(SECMOD_ReferenceModule(list->module));
if (!modulesWithRemovableSlots.append(std::move(module))) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
list = list->next;
}
}
for (auto& module : modulesWithRemovableSlots) {
// Best-effort.
Unused << SECMOD_UpdateSlotList(module.get());
}
AutoSECMODListReadLock secmodLock;
for (auto& module : modulesWithRemovableSlots) {
for (int i = 0; i < module->slotCount; i++) {
// We actually don't care about the return value here - we just need to
// call this to get NSS to update its view of this slot.
Unused << PK11_IsPresent(module->slots[i]);
}
}
#endif
return NS_OK;
}
// Returns by reference the path to the directory containing the file that has
// been loaded as MOZ_DLL_PREFIX nss3 MOZ_DLL_SUFFIX.
// |result| is encoded in UTF-8.
static nsresult GetNSS3Directory(nsCString& result) {
MOZ_ASSERT(NS_IsMainThread());
UniquePRString nss3Path(
PR_GetLibraryFilePathname(MOZ_DLL_PREFIX "nss3" MOZ_DLL_SUFFIX,
reinterpret_cast<PRFuncPtr>(NSS_Initialize)));
if (!nss3Path) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("nss not loaded?"));
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIFile> nss3File(do_CreateInstance(NS_LOCAL_FILE_CONTRACTID));
if (!nss3File) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("couldn't create a file?"));
return NS_ERROR_FAILURE;
}
nsAutoCString nss3PathAsString(nss3Path.get());
nsresult rv = nss3File->InitWithNativePath(nss3PathAsString);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("couldn't initialize file with path '%s'", nss3Path.get()));
return rv;
}
nsCOMPtr<nsIFile> nss3Directory;
rv = nss3File->GetParent(getter_AddRefs(nss3Directory));
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("couldn't get parent directory?"));
return rv;
}
return FileToCString(nss3Directory, result);
}
// The loadable roots library is probably in the same directory we loaded the
// NSS shared library from, but in some cases it may be elsewhere. This function
// enumerates and returns the possible locations as nsCStrings.
// |possibleLoadableRootsLocations| is encoded in UTF-8.
static nsresult ListPossibleLoadableRootsLocations(
Vector<nsCString>& possibleLoadableRootsLocations) {
MOZ_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return NS_ERROR_NOT_SAME_THREAD;
}
// First try in the directory where we've already loaded
// MOZ_DLL_PREFIX nss3 MOZ_DLL_SUFFIX, since that's likely to be correct.
nsAutoCString nss3Dir;
nsresult rv = GetNSS3Directory(nss3Dir);
if (NS_SUCCEEDED(rv)) {
if (!possibleLoadableRootsLocations.append(std::move(nss3Dir))) {
return NS_ERROR_OUT_OF_MEMORY;
}
} else {
// For some reason this fails on android. In any case, we should try with
// the other potential locations we have.
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("could not determine where nss was loaded from"));
}
nsAutoCString currentProcessDir;
rv = GetDirectoryPath(NS_XPCOM_CURRENT_PROCESS_DIR, currentProcessDir);
if (NS_SUCCEEDED(rv)) {
if (!possibleLoadableRootsLocations.append(std::move(currentProcessDir))) {
return NS_ERROR_OUT_OF_MEMORY;
}
} else {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("could not get current process directory"));
}
nsAutoCString greDir;
rv = GetDirectoryPath(NS_GRE_DIR, greDir);
if (NS_SUCCEEDED(rv)) {
if (!possibleLoadableRootsLocations.append(std::move(greDir))) {
return NS_ERROR_OUT_OF_MEMORY;
}
} else {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("could not get gre directory"));
}
// As a last resort, this will cause the library loading code to use the OS'
// default library search path.
nsAutoCString emptyString;
if (!possibleLoadableRootsLocations.append(std::move(emptyString))) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
nsresult LoadLoadableCertsTask::LoadLoadableRoots() {
for (const auto& possibleLocation : mPossibleLoadableRootsLocations) {
if (mozilla::psm::LoadLoadableRoots(possibleLocation)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("loaded CKBI from %s", possibleLocation.get()));
return NS_OK;
}
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("could not load loadable roots"));
return NS_ERROR_FAILURE;
}
// Table of pref names and SSL cipher ID
typedef struct {
const char* pref;
int32_t id;
bool (*prefGetter)();
} CipherPref;
// Update the switch statement in AccumulateCipherSuite in nsNSSCallbacks.cpp
// when you add/remove cipher suites here.
static const CipherPref sCipherPrefs[] = {
{"security.ssl3.ecdhe_rsa_aes_128_gcm_sha256",
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
StaticPrefs::security_ssl3_ecdhe_rsa_aes_128_gcm_sha256},
{"security.ssl3.ecdhe_ecdsa_aes_128_gcm_sha256",
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
StaticPrefs::security_ssl3_ecdhe_ecdsa_aes_128_gcm_sha256},
{"security.ssl3.ecdhe_ecdsa_chacha20_poly1305_sha256",
TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
StaticPrefs::security_ssl3_ecdhe_ecdsa_chacha20_poly1305_sha256},
{"security.ssl3.ecdhe_rsa_chacha20_poly1305_sha256",
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
StaticPrefs::security_ssl3_ecdhe_rsa_chacha20_poly1305_sha256},
{"security.ssl3.ecdhe_ecdsa_aes_256_gcm_sha384",
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
StaticPrefs::security_ssl3_ecdhe_ecdsa_aes_256_gcm_sha384},
{"security.ssl3.ecdhe_rsa_aes_256_gcm_sha384",
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
StaticPrefs::security_ssl3_ecdhe_rsa_aes_256_gcm_sha384},
{"security.ssl3.ecdhe_rsa_aes_128_sha", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
StaticPrefs::security_ssl3_ecdhe_rsa_aes_128_sha},
{"security.ssl3.ecdhe_ecdsa_aes_128_sha",
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
StaticPrefs::security_ssl3_ecdhe_ecdsa_aes_128_sha},
{"security.ssl3.ecdhe_rsa_aes_256_sha", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
StaticPrefs::security_ssl3_ecdhe_rsa_aes_256_sha},
{"security.ssl3.ecdhe_ecdsa_aes_256_sha",
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
StaticPrefs::security_ssl3_ecdhe_ecdsa_aes_256_sha},
{"security.ssl3.dhe_rsa_aes_128_sha", TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
StaticPrefs::security_ssl3_dhe_rsa_aes_128_sha},
{"security.ssl3.dhe_rsa_aes_256_sha", TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
StaticPrefs::security_ssl3_dhe_rsa_aes_256_sha},
{"security.tls13.aes_128_gcm_sha256", TLS_AES_128_GCM_SHA256,
StaticPrefs::security_tls13_aes_128_gcm_sha256},
{"security.tls13.chacha20_poly1305_sha256", TLS_CHACHA20_POLY1305_SHA256,
StaticPrefs::security_tls13_chacha20_poly1305_sha256},
{"security.tls13.aes_256_gcm_sha384", TLS_AES_256_GCM_SHA384,
StaticPrefs::security_tls13_aes_256_gcm_sha384},
{"security.ssl3.rsa_aes_128_gcm_sha256", TLS_RSA_WITH_AES_128_GCM_SHA256,
StaticPrefs::security_ssl3_rsa_aes_128_gcm_sha256},
{"security.ssl3.rsa_aes_256_gcm_sha384", TLS_RSA_WITH_AES_256_GCM_SHA384,
StaticPrefs::security_ssl3_rsa_aes_256_gcm_sha384},
{"security.ssl3.rsa_aes_128_sha", TLS_RSA_WITH_AES_128_CBC_SHA,
StaticPrefs::security_ssl3_rsa_aes_128_sha},
{"security.ssl3.rsa_aes_256_sha", TLS_RSA_WITH_AES_256_CBC_SHA,
StaticPrefs::security_ssl3_rsa_aes_256_sha},
};
// These ciphersuites can only be enabled if deprecated versions of TLS are
// also enabled (via the preference "security.tls.version.enable-deprecated").
static const CipherPref sDeprecatedTLS1CipherPrefs[] = {
{"security.ssl3.deprecated.rsa_des_ede3_sha", TLS_RSA_WITH_3DES_EDE_CBC_SHA,
StaticPrefs::security_ssl3_deprecated_rsa_des_ede3_sha},
};
// This function will convert from pref values like 1, 2, ...
// to the internal values of SSL_LIBRARY_VERSION_TLS_1_0,
// SSL_LIBRARY_VERSION_TLS_1_1, ...
/*static*/
void nsNSSComponent::FillTLSVersionRange(SSLVersionRange& rangeOut,
uint32_t minFromPrefs,
uint32_t maxFromPrefs,
SSLVersionRange defaults) {
rangeOut = defaults;
// determine what versions are supported
SSLVersionRange supported;
if (SSL_VersionRangeGetSupported(ssl_variant_stream, &supported) !=
SECSuccess) {
return;
}
// Clip the defaults by what NSS actually supports to enable
// working with a system NSS with different ranges.
rangeOut.min = std::max(rangeOut.min, supported.min);
rangeOut.max = std::min(rangeOut.max, supported.max);
// convert min/maxFromPrefs to the internal representation
minFromPrefs += SSL_LIBRARY_VERSION_3_0;
maxFromPrefs += SSL_LIBRARY_VERSION_3_0;
// if min/maxFromPrefs are invalid, use defaults
if (minFromPrefs > maxFromPrefs || minFromPrefs < supported.min ||
maxFromPrefs > supported.max ||
minFromPrefs < SSL_LIBRARY_VERSION_TLS_1_0) {
return;
}
// fill out rangeOut
rangeOut.min = (uint16_t)minFromPrefs;
rangeOut.max = (uint16_t)maxFromPrefs;
}
static void ConfigureTLSSessionIdentifiers() {
bool disableSessionIdentifiers =
StaticPrefs::security_ssl_disable_session_identifiers();
SSL_OptionSetDefault(SSL_ENABLE_SESSION_TICKETS, !disableSessionIdentifiers);
SSL_OptionSetDefault(SSL_NO_CACHE, disableSessionIdentifiers);
}
nsresult CommonInit() {
SSL_OptionSetDefault(SSL_ENABLE_SSL2, false);
SSL_OptionSetDefault(SSL_V2_COMPATIBLE_HELLO, false);
nsresult rv = nsNSSComponent::SetEnabledTLSVersions();
if (NS_FAILED(rv)) {
return rv;
}
ConfigureTLSSessionIdentifiers();
SSL_OptionSetDefault(SSL_REQUIRE_SAFE_NEGOTIATION,
StaticPrefs::security_ssl_require_safe_negotiation());
SSL_OptionSetDefault(SSL_ENABLE_RENEGOTIATION, SSL_RENEGOTIATE_REQUIRES_XTN);
SSL_OptionSetDefault(SSL_ENABLE_EXTENDED_MASTER_SECRET, true);
SSL_OptionSetDefault(SSL_ENABLE_HELLO_DOWNGRADE_CHECK,
StaticPrefs::security_tls_hello_downgrade_check());
SSL_OptionSetDefault(SSL_ENABLE_FALSE_START,
StaticPrefs::security_ssl_enable_false_start());
// SSL_ENABLE_ALPN also requires calling SSL_SetNextProtoNego in order for
// the extensions to be negotiated.
// WebRTC does not do that so it will not use ALPN even when this preference
// is true.
SSL_OptionSetDefault(SSL_ENABLE_ALPN,
StaticPrefs::security_ssl_enable_alpn());
SSL_OptionSetDefault(SSL_ENABLE_0RTT_DATA,
StaticPrefs::security_tls_enable_0rtt_data());
SSL_OptionSetDefault(SSL_ENABLE_POST_HANDSHAKE_AUTH,
StaticPrefs::security_tls_enable_post_handshake_auth());
SSL_OptionSetDefault(
SSL_ENABLE_DELEGATED_CREDENTIALS,
StaticPrefs::security_tls_enable_delegated_credentials());
rv = InitializeCipherSuite();
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Error,
("Unable to initialize cipher suite settings\n"));
return rv;
}
DisableMD5();
mozilla::pkix::RegisterErrorTable();
SharedSSLState::GlobalInit();
RememberCertErrorsTable::Init();
SetValidationOptionsCommon();
return NS_OK;
}
void NSSShutdownForSocketProcess() {
MOZ_ASSERT(XRE_IsSocketProcess());
SharedSSLState::GlobalCleanup();
RememberCertErrorsTable::Cleanup();
}
bool HandleTLSPrefChange(const nsCString& prefName) {
// Note that the code in this function should be kept in sync with
// gCallbackSecurityPrefs in nsIOService.cpp.
bool prefFound = true;
if (prefName.EqualsLiteral("security.tls.version.min") ||
prefName.EqualsLiteral("security.tls.version.max") ||
prefName.EqualsLiteral("security.tls.version.enable-deprecated")) {
Unused << nsNSSComponent::SetEnabledTLSVersions();
} else if (prefName.EqualsLiteral("security.tls.hello_downgrade_check")) {
SSL_OptionSetDefault(SSL_ENABLE_HELLO_DOWNGRADE_CHECK,
StaticPrefs::security_tls_hello_downgrade_check());
} else if (prefName.EqualsLiteral("security.ssl.require_safe_negotiation")) {
SSL_OptionSetDefault(SSL_REQUIRE_SAFE_NEGOTIATION,
StaticPrefs::security_ssl_require_safe_negotiation());
} else if (prefName.EqualsLiteral("security.ssl.enable_false_start")) {
SSL_OptionSetDefault(SSL_ENABLE_FALSE_START,
StaticPrefs::security_ssl_enable_false_start());
} else if (prefName.EqualsLiteral("security.ssl.enable_alpn")) {
SSL_OptionSetDefault(SSL_ENABLE_ALPN,
StaticPrefs::security_ssl_enable_alpn());
} else if (prefName.EqualsLiteral("security.tls.enable_0rtt_data")) {
SSL_OptionSetDefault(SSL_ENABLE_0RTT_DATA,
StaticPrefs::security_tls_enable_0rtt_data());
} else if (prefName.EqualsLiteral(
"security.tls.enable_post_handshake_auth")) {
SSL_OptionSetDefault(
SSL_ENABLE_POST_HANDSHAKE_AUTH,
StaticPrefs::security_tls_enable_post_handshake_auth());
} else if (prefName.EqualsLiteral(
"security.tls.enable_delegated_credentials")) {
SSL_OptionSetDefault(
SSL_ENABLE_DELEGATED_CREDENTIALS,
StaticPrefs::security_tls_enable_delegated_credentials());
} else if (prefName.EqualsLiteral(
"security.ssl.disable_session_identifiers")) {
ConfigureTLSSessionIdentifiers();
} else {
prefFound = false;
}
return prefFound;
}
void SetValidationOptionsCommon() {
// Note that the code in this function should be kept in sync with
// gCallbackSecurityPrefs in nsIOService.cpp.
bool ocspStaplingEnabled = StaticPrefs::security_ssl_enable_ocsp_stapling();
PublicSSLState()->SetOCSPStaplingEnabled(ocspStaplingEnabled);
PrivateSSLState()->SetOCSPStaplingEnabled(ocspStaplingEnabled);
bool ocspMustStapleEnabled =
StaticPrefs::security_ssl_enable_ocsp_must_staple();
PublicSSLState()->SetOCSPMustStapleEnabled(ocspMustStapleEnabled);
PrivateSSLState()->SetOCSPMustStapleEnabled(ocspMustStapleEnabled);
const CertVerifier::CertificateTransparencyMode defaultCTMode =
CertVerifier::CertificateTransparencyMode::TelemetryOnly;
CertVerifier::CertificateTransparencyMode ctMode =
static_cast<CertVerifier::CertificateTransparencyMode>(
StaticPrefs::security_pki_certificate_transparency_mode());
switch (ctMode) {
case CertVerifier::CertificateTransparencyMode::Disabled:
case CertVerifier::CertificateTransparencyMode::TelemetryOnly:
break;
default:
ctMode = defaultCTMode;
break;
}
bool sctsEnabled =
ctMode != CertVerifier::CertificateTransparencyMode::Disabled;
PublicSSLState()->SetSignedCertTimestampsEnabled(sctsEnabled);
PrivateSSLState()->SetSignedCertTimestampsEnabled(sctsEnabled);
}
namespace {
class CipherSuiteChangeObserver : public nsIObserver {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
static nsresult StartObserve();
protected:
virtual ~CipherSuiteChangeObserver() = default;
private:
static StaticRefPtr<CipherSuiteChangeObserver> sObserver;
CipherSuiteChangeObserver() = default;
};
NS_IMPL_ISUPPORTS(CipherSuiteChangeObserver, nsIObserver)
// static
StaticRefPtr<CipherSuiteChangeObserver> CipherSuiteChangeObserver::sObserver;
// static
nsresult CipherSuiteChangeObserver::StartObserve() {
MOZ_ASSERT(NS_IsMainThread(),
"CipherSuiteChangeObserver::StartObserve() can only be accessed "
"on the main thread");
if (!sObserver) {
RefPtr<CipherSuiteChangeObserver> observer =
new CipherSuiteChangeObserver();
nsresult rv = Preferences::AddStrongObserver(observer.get(), "security.");
if (NS_FAILED(rv)) {
sObserver = nullptr;
return rv;
}
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
observerService->AddObserver(observer, NS_XPCOM_SHUTDOWN_OBSERVER_ID,
false);
sObserver = observer;
}
return NS_OK;
}
// Enables or disabled ciphersuites from deprecated versions of TLS as
// appropriate. If security.tls.version.enable-deprecated is true, these
// ciphersuites may be enabled, if the corresponding preference is true.
// Otherwise, these ciphersuites will be disabled.
void SetDeprecatedTLS1CipherPrefs() {
if (StaticPrefs::security_tls_version_enable_deprecated()) {
for (const auto& deprecatedTLS1CipherPref : sDeprecatedTLS1CipherPrefs) {
SSL_CipherPrefSetDefault(deprecatedTLS1CipherPref.id,
deprecatedTLS1CipherPref.prefGetter());
}
} else {
for (const auto& deprecatedTLS1CipherPref : sDeprecatedTLS1CipherPrefs) {
SSL_CipherPrefSetDefault(deprecatedTLS1CipherPref.id, false);
}
}
}
nsresult CipherSuiteChangeObserver::Observe(nsISupports* /*aSubject*/,
const char* aTopic,
const char16_t* someData) {
MOZ_ASSERT(NS_IsMainThread(),
"CipherSuiteChangeObserver::Observe can only be accessed on main "
"thread");
if (nsCRT::strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID) == 0) {
NS_ConvertUTF16toUTF8 prefName(someData);
// Look through the cipher table and set according to pref setting
for (const auto& cipherPref : sCipherPrefs) {
if (prefName.Equals(cipherPref.pref)) {
SSL_CipherPrefSetDefault(cipherPref.id, cipherPref.prefGetter());
break;
}
}
SetDeprecatedTLS1CipherPrefs();
nsNSSComponent::DoClearSSLExternalAndInternalSessionCache();
} else if (nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID) == 0) {
Preferences::RemoveObserver(this, "security.");
MOZ_ASSERT(sObserver.get() == this);
sObserver = nullptr;
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
observerService->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
}
return NS_OK;
}
} // namespace
void nsNSSComponent::setValidationOptions(
bool isInitialSetting, const mozilla::MutexAutoLock& proofOfLock) {
// We access prefs so this must be done on the main thread.
mMutex.AssertCurrentThreadOwns();
MOZ_ASSERT(NS_IsMainThread());
if (NS_WARN_IF(!NS_IsMainThread())) {
return;
}
SetValidationOptionsCommon();
const CertVerifier::CertificateTransparencyMode defaultCTMode =
CertVerifier::CertificateTransparencyMode::TelemetryOnly;
CertVerifier::CertificateTransparencyMode ctMode =
static_cast<CertVerifier::CertificateTransparencyMode>(
StaticPrefs::security_pki_certificate_transparency_mode());
switch (ctMode) {
case CertVerifier::CertificateTransparencyMode::Disabled:
case CertVerifier::CertificateTransparencyMode::TelemetryOnly:
break;
default:
ctMode = defaultCTMode;
break;
}
// This preference controls whether we do OCSP fetching and does not affect
// OCSP stapling.
// 0 = disabled, 1 = enabled, 2 = only enabled for EV
uint32_t ocspEnabled = StaticPrefs::security_OCSP_enabled();
bool ocspRequired = ocspEnabled > 0 && StaticPrefs::security_OCSP_require();
// We measure the setting of the pref at startup only to minimize noise by
// addons that may muck with the settings, though it probably doesn't matter.
if (isInitialSetting) {
Telemetry::Accumulate(Telemetry::CERT_OCSP_ENABLED, ocspEnabled);
Telemetry::Accumulate(Telemetry::CERT_OCSP_REQUIRED, ocspRequired);
}
NetscapeStepUpPolicy netscapeStepUpPolicy = static_cast<NetscapeStepUpPolicy>(
StaticPrefs::security_pki_netscape_step_up_policy());
switch (netscapeStepUpPolicy) {
case NetscapeStepUpPolicy::AlwaysMatch:
case NetscapeStepUpPolicy::MatchBefore23August2016:
case NetscapeStepUpPolicy::MatchBefore23August2015:
case NetscapeStepUpPolicy::NeverMatch:
break;
default:
netscapeStepUpPolicy = NetscapeStepUpPolicy::AlwaysMatch;
break;
}
CRLiteMode defaultCRLiteMode = CRLiteMode::Disabled;
CRLiteMode crliteMode =
static_cast<CRLiteMode>(StaticPrefs::security_pki_crlite_mode());
switch (crliteMode) {
case CRLiteMode::Disabled:
case CRLiteMode::TelemetryOnly:
case CRLiteMode::Enforce:
case CRLiteMode::ConfirmRevocations:
break;
default:
crliteMode = defaultCRLiteMode;
break;
}
CertVerifier::OcspDownloadConfig odc;
CertVerifier::OcspStrictConfig osc;
uint32_t certShortLifetimeInDays;
TimeDuration softTimeout;
TimeDuration hardTimeout;
GetRevocationBehaviorFromPrefs(&odc, &osc, &certShortLifetimeInDays,
softTimeout, hardTimeout);
mDefaultCertVerifier = new SharedCertVerifier(
odc, osc, softTimeout, hardTimeout, certShortLifetimeInDays,
netscapeStepUpPolicy, ctMode, crliteMode, mEnterpriseCerts);
}
void nsNSSComponent::UpdateCertVerifierWithEnterpriseRoots() {
MutexAutoLock lock(mMutex);
MOZ_ASSERT(mDefaultCertVerifier);
if (NS_WARN_IF(!mDefaultCertVerifier)) {
return;
}
RefPtr<SharedCertVerifier> oldCertVerifier = mDefaultCertVerifier;
mDefaultCertVerifier = new SharedCertVerifier(
oldCertVerifier->mOCSPDownloadConfig,
oldCertVerifier->mOCSPStrict ? CertVerifier::ocspStrict
: CertVerifier::ocspRelaxed,
oldCertVerifier->mOCSPTimeoutSoft, oldCertVerifier->mOCSPTimeoutHard,
oldCertVerifier->mCertShortLifetimeInDays,
oldCertVerifier->mNetscapeStepUpPolicy, oldCertVerifier->mCTMode,
oldCertVerifier->mCRLiteMode, mEnterpriseCerts);
}
// Enable the TLS versions given in the prefs, defaulting to TLS 1.0 (min) and
// TLS 1.2 (max) when the prefs aren't set or set to invalid values.
nsresult nsNSSComponent::SetEnabledTLSVersions() {
// Keep these values in sync with all.js.
// 1 means TLS 1.0, 2 means TLS 1.1, etc.
static const uint32_t PSM_DEFAULT_MIN_TLS_VERSION = 3;
static const uint32_t PSM_DEFAULT_MAX_TLS_VERSION = 4;
static const uint32_t PSM_DEPRECATED_TLS_VERSION = 1;
uint32_t minFromPrefs = StaticPrefs::security_tls_version_min();
uint32_t maxFromPrefs = StaticPrefs::security_tls_version_max();
// This override should be removed some time after
// PSM_DEFAULT_MIN_TLS_VERSION is increased to 3.
bool enableDeprecated = StaticPrefs::security_tls_version_enable_deprecated();
if (enableDeprecated) {
minFromPrefs = std::min(minFromPrefs, PSM_DEPRECATED_TLS_VERSION);
}
SSLVersionRange defaults = {
SSL_LIBRARY_VERSION_3_0 + PSM_DEFAULT_MIN_TLS_VERSION,
SSL_LIBRARY_VERSION_3_0 + PSM_DEFAULT_MAX_TLS_VERSION};
SSLVersionRange filledInRange;
FillTLSVersionRange(filledInRange, minFromPrefs, maxFromPrefs, defaults);
SECStatus srv =
SSL_VersionRangeSetDefault(ssl_variant_stream, &filledInRange);
if (srv != SECSuccess) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
#if defined(XP_WIN) || (defined(XP_LINUX) && !defined(ANDROID))
// If the profile directory is on a networked drive, we want to set the
// environment variable NSS_SDB_USE_CACHE to yes (as long as it hasn't been set
// before).
static void SetNSSDatabaseCacheModeAsAppropriate() {
MOZ_ASSERT(NS_IsMainThread());
nsCOMPtr<nsIFile> profileFile;
nsresult rv = NS_GetSpecialDirectory(NS_APP_USER_PROFILE_50_DIR,
getter_AddRefs(profileFile));
if (NS_FAILED(rv)) {
// We're probably running without a profile directory, so this is
// irrelevant.
return;
}
static const char sNSS_SDB_USE_CACHE[] = "NSS_SDB_USE_CACHE";
static const char sNSS_SDB_USE_CACHE_WITH_VALUE[] = "NSS_SDB_USE_CACHE=yes";
auto profilePath = profileFile->NativePath();
# if defined(XP_LINUX) && !defined(ANDROID)
struct statfs statfs_s;
if (statfs(profilePath.get(), &statfs_s) == 0 &&
statfs_s.f_type == NFS_SUPER_MAGIC && !PR_GetEnv(sNSS_SDB_USE_CACHE)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("profile is remote (and NSS_SDB_USE_CACHE wasn't set): "
"setting NSS_SDB_USE_CACHE"));
PR_SetEnv(sNSS_SDB_USE_CACHE_WITH_VALUE);
} else {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("not setting NSS_SDB_USE_CACHE"));
}
# endif // defined(XP_LINUX) && !defined(ANDROID)
# ifdef XP_WIN