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a13bccff29f0adaad5b24ebce13e68422350b51c
tubestation/security/manager/ssl/nsNSSComponent.cpp
Dana Keeler a13bccff29 Bug 1712837 - introduce ipcclientcerts to allow client certificates to work with the socket process r=rmf,kershaw,necko-reviewers,ipc-reviewers,nika,jschanck 
This patch introduces ipcclientcerts, a PKCS#11 module that the socket process
can load to get access to client certificates and keys managed by the parent
process. This enables client certificate authentication to work with the socket
process (particularly for keys stored outside of NSS, as with osclientcerts or
third-party PKCS#11 modules).

Differential Revision: https://phabricator.services.mozilla.com/D122392
2021-12-01 18:10:34 +00:00

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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/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 c-string representation of the location of that
// file (encapsulated in an nsACString). This function handles a
// platform-specific issue on Windows where Unicode characters that cannot be
// mapped to the system's codepage will be dropped, resulting in a c-string
// that is useless to describe the location of the file in question.
// This operation is generally to be avoided, except when interacting with
// third-party or legacy libraries that cannot handle `nsIFile`s (such as NSS).
nsresult FileToCString(const nsCOMPtr<nsIFile>& file, nsACString& result) {
#ifdef XP_WIN
// Native path will drop Unicode characters that cannot be mapped to system's
// codepage, using short (canonical) path as workaround.
nsCOMPtr<nsILocalFileWin> fileWin = do_QueryInterface(file);
if (!fileWin) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("couldn't get nsILocalFileWin"));
return NS_ERROR_FAILURE;
}
return fileWin->GetNativeCanonicalPath(result);
#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);
}
// 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;
}
// 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;
}
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_DEFAULT = 2000;
static const uint32_t OCSP_TIMEOUT_MILLISECONDS_SOFT_MAX = 5000;
static const uint32_t OCSP_TIMEOUT_MILLISECONDS_HARD_DEFAULT = 10000;
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, const MutexAutoLock& /*proofOfLock*/) {
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
int32_t ocspLevel = Preferences::GetInt("security.OCSP.enabled", 1);
switch (ocspLevel) {
case 0:
*odc = CertVerifier::ocspOff;
break;
case 2:
*odc = CertVerifier::ocspEVOnly;
break;
default:
*odc = CertVerifier::ocspOn;
break;
}
*osc = Preferences::GetBool("security.OCSP.require", false)
? CertVerifier::ocspStrict
: CertVerifier::ocspRelaxed;
// If we pass in just 0 as the second argument to Preferences::GetUint, there
// are two function signatures that match (given that 0 can be intepreted as
// a null pointer). Thus the compiler will complain without the cast.
*certShortLifetimeInDays = Preferences::GetUint(
"security.pki.cert_short_lifetime_in_days", static_cast<uint32_t>(0));
uint32_t softTimeoutMillis =
Preferences::GetUint("security.OCSP.timeoutMilliseconds.soft",
OCSP_TIMEOUT_MILLISECONDS_SOFT_DEFAULT);
softTimeoutMillis =
std::min(softTimeoutMillis, OCSP_TIMEOUT_MILLISECONDS_SOFT_MAX);
softTimeout = TimeDuration::FromMilliseconds(softTimeoutMillis);
uint32_t hardTimeoutMillis =
Preferences::GetUint("security.OCSP.timeoutMilliseconds.hard",
OCSP_TIMEOUT_MILLISECONDS_HARD_DEFAULT);
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'", 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
// On Windows 8.1, if the following preference is 2, we will attempt to detect
// if the Family Safety TLS interception feature has been enabled. If so, we
// will behave as if the enterprise roots feature has been enabled (i.e. import
// and trust third party root certificates from the OS).
// With any other value of the pref or on any other platform, this does nothing.
// This preference takes precedence over "security.enterprise_roots.enabled".
const char* kFamilySafetyModePref = "security.family_safety.mode";
const uint32_t kFamilySafetyModeDefault = 0;
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();
}
static const char* kEnterpriseRootModePref =
"security.enterprise_roots.enabled";
static const char* kOSClientCertsModulePref = "security.osclientcerts.autoload";
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 =
Preferences::GetBool(kEnterpriseRootModePref, false);
uint32_t familySafetyMode =
Preferences::GetUint(kFamilySafetyModePref, kFamilySafetyModeDefault);
// 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;
Maybe<nsCString> mOSClientCertsModuleLocation;
};
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.
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_HasRemovableSlots(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;
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 two steps. The lock protects the list itself, so
// if we get our own owned references to the modules we're interested in,
// there's no thread safety concern here.
Vector<UniqueSECMODModule> modulesWithRemovableSlots;
{
AutoSECMODListReadLock secmodLock;
SECMODModuleList* list = SECMOD_GetDefaultModuleList();
while (list) {
if (SECMOD_HasRemovableSlots(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());
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.
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.
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 enabledByDefault;
} 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, true},
{"security.ssl3.ecdhe_ecdsa_aes_128_gcm_sha256",
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, true},
{"security.ssl3.ecdhe_ecdsa_chacha20_poly1305_sha256",
TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, true},
{"security.ssl3.ecdhe_rsa_chacha20_poly1305_sha256",
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, true},
{"security.ssl3.ecdhe_ecdsa_aes_256_gcm_sha384",
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, true},
{"security.ssl3.ecdhe_rsa_aes_256_gcm_sha384",
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, true},
{"security.ssl3.ecdhe_rsa_aes_128_sha", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
true},
{"security.ssl3.ecdhe_ecdsa_aes_128_sha",
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, true},
{"security.ssl3.ecdhe_rsa_aes_256_sha", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
true},
{"security.ssl3.ecdhe_ecdsa_aes_256_sha",
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, true},
{"security.ssl3.dhe_rsa_aes_128_sha", TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
false},
{"security.ssl3.dhe_rsa_aes_256_sha", TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
false},
{"security.tls13.aes_128_gcm_sha256", TLS_AES_128_GCM_SHA256, true},
{"security.tls13.chacha20_poly1305_sha256", TLS_CHACHA20_POLY1305_SHA256,
true},
{"security.tls13.aes_256_gcm_sha384", TLS_AES_256_GCM_SHA384, true},
{"security.ssl3.rsa_aes_128_gcm_sha256", TLS_RSA_WITH_AES_128_GCM_SHA256,
true}, // deprecated (RSA key exchange)
{"security.ssl3.rsa_aes_256_gcm_sha384", TLS_RSA_WITH_AES_256_GCM_SHA384,
true}, // deprecated (RSA key exchange)
{"security.ssl3.rsa_aes_128_sha", TLS_RSA_WITH_AES_128_CBC_SHA,
true}, // deprecated (RSA key exchange)
{"security.ssl3.rsa_aes_256_sha", TLS_RSA_WITH_AES_256_CBC_SHA,
true}, // deprecated (RSA key exchange)
};
// 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,
true},
};
// 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 const int32_t OCSP_ENABLED_DEFAULT = 1;
static const bool REQUIRE_SAFE_NEGOTIATION_DEFAULT = false;
static const bool FALSE_START_ENABLED_DEFAULT = true;
static const bool ALPN_ENABLED_DEFAULT = false;
static const bool ENABLED_0RTT_DATA_DEFAULT = false;
static const bool HELLO_DOWNGRADE_CHECK_DEFAULT = true;
static const bool ENABLED_POST_HANDSHAKE_AUTH_DEFAULT = false;
static const bool DELEGATED_CREDENTIALS_ENABLED_DEFAULT = false;
static void ConfigureTLSSessionIdentifiers() {
bool disableSessionIdentifiers =
Preferences::GetBool("security.ssl.disable_session_identifiers", false);
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();
bool requireSafeNegotiation =
Preferences::GetBool("security.ssl.require_safe_negotiation",
REQUIRE_SAFE_NEGOTIATION_DEFAULT);
SSL_OptionSetDefault(SSL_REQUIRE_SAFE_NEGOTIATION, requireSafeNegotiation);
SSL_OptionSetDefault(SSL_ENABLE_RENEGOTIATION, SSL_RENEGOTIATE_REQUIRES_XTN);
SSL_OptionSetDefault(SSL_ENABLE_EXTENDED_MASTER_SECRET, true);
bool enableDowngradeCheck = Preferences::GetBool(
"security.tls.hello_downgrade_check", HELLO_DOWNGRADE_CHECK_DEFAULT);
SSL_OptionSetDefault(SSL_ENABLE_HELLO_DOWNGRADE_CHECK, enableDowngradeCheck);
SSL_OptionSetDefault(SSL_ENABLE_FALSE_START,
Preferences::GetBool("security.ssl.enable_false_start",
FALSE_START_ENABLED_DEFAULT));
// 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,
Preferences::GetBool("security.ssl.enable_alpn", ALPN_ENABLED_DEFAULT));
SSL_OptionSetDefault(SSL_ENABLE_0RTT_DATA,
Preferences::GetBool("security.tls.enable_0rtt_data",
ENABLED_0RTT_DATA_DEFAULT));
SSL_OptionSetDefault(
SSL_ENABLE_POST_HANDSHAKE_AUTH,
Preferences::GetBool("security.tls.enable_post_handshake_auth",
ENABLED_POST_HANDSHAKE_AUTH_DEFAULT));
SSL_OptionSetDefault(
SSL_ENABLE_DELEGATED_CREDENTIALS,
Preferences::GetBool("security.tls.enable_delegated_credentials",
DELEGATED_CREDENTIALS_ENABLED_DEFAULT));
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")) {
(void)nsNSSComponent::SetEnabledTLSVersions();
} else if (prefName.EqualsLiteral("security.tls.hello_downgrade_check")) {
bool enableDowngradeCheck = Preferences::GetBool(
"security.tls.hello_downgrade_check", HELLO_DOWNGRADE_CHECK_DEFAULT);
SSL_OptionSetDefault(SSL_ENABLE_HELLO_DOWNGRADE_CHECK,
enableDowngradeCheck);
} else if (prefName.EqualsLiteral("security.ssl.require_safe_negotiation")) {
bool requireSafeNegotiation =
Preferences::GetBool("security.ssl.require_safe_negotiation",
REQUIRE_SAFE_NEGOTIATION_DEFAULT);
SSL_OptionSetDefault(SSL_REQUIRE_SAFE_NEGOTIATION, requireSafeNegotiation);
} else if (prefName.EqualsLiteral("security.ssl.enable_false_start")) {
SSL_OptionSetDefault(SSL_ENABLE_FALSE_START,
Preferences::GetBool("security.ssl.enable_false_start",
FALSE_START_ENABLED_DEFAULT));
} else if (prefName.EqualsLiteral("security.ssl.enable_alpn")) {
SSL_OptionSetDefault(
SSL_ENABLE_ALPN,
Preferences::GetBool("security.ssl.enable_alpn", ALPN_ENABLED_DEFAULT));
} else if (prefName.EqualsLiteral("security.tls.enable_0rtt_data")) {
SSL_OptionSetDefault(SSL_ENABLE_0RTT_DATA,
Preferences::GetBool("security.tls.enable_0rtt_data",
ENABLED_0RTT_DATA_DEFAULT));
} else if (prefName.EqualsLiteral(
"security.tls.enable_post_handshake_auth")) {
SSL_OptionSetDefault(
SSL_ENABLE_POST_HANDSHAKE_AUTH,
Preferences::GetBool("security.tls.enable_post_handshake_auth",
ENABLED_POST_HANDSHAKE_AUTH_DEFAULT));
} else if (prefName.EqualsLiteral(
"security.tls.enable_delegated_credentials")) {
SSL_OptionSetDefault(
SSL_ENABLE_DELEGATED_CREDENTIALS,
Preferences::GetBool("security.tls.enable_delegated_credentials",
DELEGATED_CREDENTIALS_ENABLED_DEFAULT));
} 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 =
Preferences::GetBool("security.ssl.enable_ocsp_stapling", true);
PublicSSLState()->SetOCSPStaplingEnabled(ocspStaplingEnabled);
PrivateSSLState()->SetOCSPStaplingEnabled(ocspStaplingEnabled);
bool ocspMustStapleEnabled =
Preferences::GetBool("security.ssl.enable_ocsp_must_staple", true);
PublicSSLState()->SetOCSPMustStapleEnabled(ocspMustStapleEnabled);
PrivateSSLState()->SetOCSPMustStapleEnabled(ocspMustStapleEnabled);
const CertVerifier::CertificateTransparencyMode defaultCTMode =
CertVerifier::CertificateTransparencyMode::TelemetryOnly;
CertVerifier::CertificateTransparencyMode ctMode =
static_cast<CertVerifier::CertificateTransparencyMode>(
Preferences::GetInt("security.pki.certificate_transparency.mode",
static_cast<int32_t>(defaultCTMode)));
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);
BRNameMatchingPolicy::Mode nameMatchingMode =
static_cast<BRNameMatchingPolicy::Mode>(Preferences::GetInt(
"security.pki.name_matching_mode",
static_cast<int32_t>(BRNameMatchingPolicy::Mode::DoNotEnforce)));
switch (nameMatchingMode) {
case BRNameMatchingPolicy::Mode::Enforce:
case BRNameMatchingPolicy::Mode::EnforceAfter23August2015:
case BRNameMatchingPolicy::Mode::EnforceAfter23August2016:
case BRNameMatchingPolicy::Mode::DoNotEnforce:
break;
default:
nameMatchingMode = BRNameMatchingPolicy::Mode::DoNotEnforce;
break;
}
PublicSSLState()->SetNameMatchingMode(nameMatchingMode);
PrivateSSLState()->SetNameMatchingMode(nameMatchingMode);
}
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 (Preferences::GetBool("security.tls.version.enable-deprecated", false)) {
for (const auto& deprecatedTLS1CipherPref : sDeprecatedTLS1CipherPrefs) {
bool cipherEnabled =
Preferences::GetBool(deprecatedTLS1CipherPref.pref,
deprecatedTLS1CipherPref.enabledByDefault);
SSL_CipherPrefSetDefault(deprecatedTLS1CipherPref.id, cipherEnabled);
}
} 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)) {
bool cipherEnabled =
Preferences::GetBool(cipherPref.pref, cipherPref.enabledByDefault);
SSL_CipherPrefSetDefault(cipherPref.id, cipherEnabled);
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.
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>(
Preferences::GetInt("security.pki.certificate_transparency.mode",
static_cast<int32_t>(defaultCTMode)));
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
int32_t ocspEnabled =
Preferences::GetInt("security.OCSP.enabled", OCSP_ENABLED_DEFAULT);
bool ocspRequired =
ocspEnabled && Preferences::GetBool("security.OCSP.require", false);
// 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);
}
CertVerifier::SHA1Mode sha1Mode =
static_cast<CertVerifier::SHA1Mode>(Preferences::GetInt(
"security.pki.sha1_enforcement_level",
static_cast<int32_t>(CertVerifier::SHA1Mode::Allowed)));
switch (sha1Mode) {
case CertVerifier::SHA1Mode::Allowed:
case CertVerifier::SHA1Mode::Forbidden:
case CertVerifier::SHA1Mode::UsedToBeBefore2016ButNowIsForbidden:
case CertVerifier::SHA1Mode::ImportedRoot:
case CertVerifier::SHA1Mode::ImportedRootOrBefore2016:
break;
default:
sha1Mode = CertVerifier::SHA1Mode::Allowed;
break;
}
// Convert a previously-available setting to a safe one.
if (sha1Mode == CertVerifier::SHA1Mode::UsedToBeBefore2016ButNowIsForbidden) {
sha1Mode = CertVerifier::SHA1Mode::Forbidden;
}
NetscapeStepUpPolicy netscapeStepUpPolicy =
static_cast<NetscapeStepUpPolicy>(Preferences::GetUint(
"security.pki.netscape_step_up_policy",
static_cast<uint32_t>(NetscapeStepUpPolicy::AlwaysMatch)));
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>(Preferences::GetUint(
"security.pki.crlite_mode", static_cast<uint32_t>(defaultCRLiteMode)));
switch (crliteMode) {
case CRLiteMode::Disabled:
case CRLiteMode::TelemetryOnly:
case CRLiteMode::Enforce:
break;
default:
crliteMode = defaultCRLiteMode;
break;
}
uint32_t defaultCRLiteCTMergeDelaySeconds =
60 * 60 * 28; // 28 hours in seconds
uint64_t maxCRLiteCTMergeDelaySeconds = 60 * 60 * 24 * 365;
uint64_t crliteCTMergeDelaySeconds =
Preferences::GetUint("security.pki.crlite_ct_merge_delay_seconds",
defaultCRLiteCTMergeDelaySeconds);
if (crliteCTMergeDelaySeconds > maxCRLiteCTMergeDelaySeconds) {
crliteCTMergeDelaySeconds = maxCRLiteCTMergeDelaySeconds;
}
CertVerifier::OcspDownloadConfig odc;
CertVerifier::OcspStrictConfig osc;
uint32_t certShortLifetimeInDays;
TimeDuration softTimeout;
TimeDuration hardTimeout;
GetRevocationBehaviorFromPrefs(&odc, &osc, &certShortLifetimeInDays,
softTimeout, hardTimeout, proofOfLock);
mDefaultCertVerifier = new SharedCertVerifier(
odc, osc, softTimeout, hardTimeout, certShortLifetimeInDays, sha1Mode,
PublicSSLState()->NameMatchingMode(), netscapeStepUpPolicy, ctMode,
crliteMode, crliteCTMergeDelaySeconds, 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->mSHA1Mode,
oldCertVerifier->mNameMatchingMode,
oldCertVerifier->mNetscapeStepUpPolicy, oldCertVerifier->mCTMode,
oldCertVerifier->mCRLiteMode, oldCertVerifier->mCRLiteCTMergeDelaySeconds,
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 = Preferences::GetUint("security.tls.version.min",
PSM_DEFAULT_MIN_TLS_VERSION);
uint32_t maxFromPrefs = Preferences::GetUint("security.tls.version.max",
PSM_DEFAULT_MAX_TLS_VERSION);
// This override should be removed some time after
// PSM_DEFAULT_MIN_TLS_VERSION is increased to 3.
bool enableDeprecated =
Preferences::GetBool("security.tls.version.enable-deprecated", false);
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
wchar_t volPath[MAX_PATH];
if (::GetVolumePathNameW(profilePath.get(), volPath, MAX_PATH) &&
::GetDriveTypeW(volPath) == DRIVE_REMOTE &&
!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 // XP_WIN
}
#endif // defined(XP_WIN) || (defined(XP_LINUX) && !defined(ANDROID))
static nsresult GetNSSProfilePath(nsAutoCString& aProfilePath) {
aProfilePath.Truncate();
nsCOMPtr<nsIFile> profileFile;
nsresult rv = NS_GetSpecialDirectory(NS_APP_USER_PROFILE_50_DIR,
getter_AddRefs(profileFile));
if (NS_FAILED(rv)) {
NS_WARNING(
"NSS will be initialized without a profile directory. "
"Some things may not work as expected.");
return NS_OK;
}
#if defined(XP_WIN)
// SQLite always takes UTF-8 file paths regardless of the current system
// code page.
nsCOMPtr<nsILocalFileWin> profileFileWin(do_QueryInterface(profileFile));
if (!profileFileWin) {
MOZ_LOG(gPIPNSSLog, LogLevel::Error,
("Could not get nsILocalFileWin for profile directory.\n"));
return NS_ERROR_FAILURE;
}
nsAutoString u16ProfilePath;
rv = profileFileWin->GetCanonicalPath(u16ProfilePath);
CopyUTF16toUTF8(u16ProfilePath, aProfilePath);
#else
rv = profileFile->GetNativePath(aProfilePath);
#endif
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Error,
("Could not get native path for profile directory.\n"));
return rv;
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("NSS profile at '%s'\n", aProfilePath.get()));
return NS_OK;
}
#ifndef ANDROID
// Given a profile path, attempt to rename the PKCS#11 module DB to
// "pkcs11.txt.fips". In the case of a catastrophic failure (e.g. out of
// memory), returns a failing nsresult. If execution could conceivably proceed,
// returns NS_OK even if renaming the file didn't work. This simplifies the
// logic of the calling code.
// |profilePath| is encoded in UTF-8.
static nsresult AttemptToRenamePKCS11ModuleDB(const nsACString& profilePath) {
nsCOMPtr<nsIFile> profileDir = do_CreateInstance("@mozilla.org/file/local;1");
if (!profileDir) {
return NS_ERROR_FAILURE;
}
# ifdef XP_WIN
// |profilePath| is encoded in UTF-8 because SQLite always takes UTF-8 file
// paths regardless of the current system code page.
nsresult rv = profileDir->InitWithPath(NS_ConvertUTF8toUTF16(profilePath));
# else
nsresult rv = profileDir->InitWithNativePath(profilePath);
# endif
if (NS_FAILED(rv)) {
return rv;
}
const char* moduleDBFilename = "pkcs11.txt";
nsAutoCString destModuleDBFilename(moduleDBFilename);
destModuleDBFilename.Append(".fips");
nsCOMPtr<nsIFile> dbFile;
rv = profileDir->Clone(getter_AddRefs(dbFile));
if (NS_FAILED(rv) || !dbFile) {
return NS_ERROR_FAILURE;
}
rv = dbFile->AppendNative(nsAutoCString(moduleDBFilename));
if (NS_FAILED(rv)) {
return rv;
}
// If the PKCS#11 module DB doesn't exist, renaming it won't help.
bool exists;
rv = dbFile->Exists(&exists);
if (NS_FAILED(rv)) {
return rv;
}
// This is strange, but not a catastrophic failure.
if (!exists) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("%s doesn't exist?", moduleDBFilename));
return NS_OK;
}
nsCOMPtr<nsIFile> destDBFile;
rv = profileDir->Clone(getter_AddRefs(destDBFile));
if (NS_FAILED(rv) || !destDBFile) {
return NS_ERROR_FAILURE;
}
rv = destDBFile->AppendNative(destModuleDBFilename);
if (NS_FAILED(rv)) {
return rv;
}
// If the destination exists, presumably we've already tried this. Doing it
// again won't help.
rv = destDBFile->Exists(&exists);
if (NS_FAILED(rv)) {
return rv;
}
// Unfortunate, but not a catastrophic failure.
if (exists) {
MOZ_LOG(
gPIPNSSLog, LogLevel::Debug,
("%s already exists - not overwriting", destModuleDBFilename.get()));
return NS_OK;
}
// Now do the actual move.
// This may fail on, e.g., a read-only file system. This would be unfortunate,
// but again it isn't catastropic and we would want to fall back to
// initializing NSS in no-DB mode.
Unused << dbFile->MoveToNative(profileDir, destModuleDBFilename);
return NS_OK;
}
#endif // ifndef ANDROID
// Given a profile directory, attempt to initialize NSS. If nocertdb is true,
// (or if we don't have a profile directory) simply initialize NSS in no DB mode
// and return. Otherwise, first attempt to initialize in read/write mode, and
// then read-only mode if that fails. If both attempts fail, we may be failing
// to initialize an NSS DB collection that has FIPS mode enabled. Attempt to
// ascertain if this is the case, and if so, rename the offending PKCS#11 module
// DB so we can (hopefully) initialize NSS in read-write mode. Again attempt
// read-only mode if that fails. Finally, fall back to no DB mode. On Android
// we can skip the FIPS workaround since it was never possible to enable FIPS
// there anyway.
// |profilePath| is encoded in UTF-8.
static nsresult InitializeNSSWithFallbacks(const nsACString& profilePath,
bool nocertdb, bool safeMode) {
if (nocertdb || profilePath.IsEmpty()) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("nocertdb mode or empty profile path -> NSS_NoDB_Init"));
SECStatus srv = NSS_NoDB_Init(nullptr);
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
if (srv != SECSuccess) {
MOZ_CRASH_UNSAFE_PRINTF("InitializeNSSWithFallbacks failed: %d",
PR_GetError());
}
#endif
return srv == SECSuccess ? NS_OK : NS_ERROR_FAILURE;
}
// Try read/write mode. If we're in safeMode, we won't load PKCS#11 modules.
#ifndef ANDROID
PRErrorCode savedPRErrorCode1;
#endif // ifndef ANDROID
PKCS11DBConfig safeModeDBConfig =
safeMode ? PKCS11DBConfig::DoNotLoadModules : PKCS11DBConfig::LoadModules;
SECStatus srv = ::mozilla::psm::InitializeNSS(
profilePath, NSSDBConfig::ReadWrite, safeModeDBConfig);
if (srv == SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("initialized NSS in r/w mode"));
return NS_OK;
}
#ifndef ANDROID
savedPRErrorCode1 = PR_GetError();
PRErrorCode savedPRErrorCode2;
#endif // ifndef ANDROID
// That failed. Try read-only mode.
srv = ::mozilla::psm::InitializeNSS(profilePath, NSSDBConfig::ReadOnly,
safeModeDBConfig);
if (srv == SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("initialized NSS in r-o mode"));
return NS_OK;
}
#ifndef ANDROID
savedPRErrorCode2 = PR_GetError();
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("failed to initialize NSS with codes %d %d", savedPRErrorCode1,
savedPRErrorCode2));
#endif // ifndef ANDROID
#ifndef ANDROID
// That failed as well. Maybe we're trying to load a PKCS#11 module DB that is
// in FIPS mode, but we don't support FIPS? Test load NSS without PKCS#11
// modules. If that succeeds, that's probably what's going on.
if (!safeMode && (savedPRErrorCode1 == SEC_ERROR_LEGACY_DATABASE ||
savedPRErrorCode2 == SEC_ERROR_LEGACY_DATABASE ||
savedPRErrorCode1 == SEC_ERROR_PKCS11_DEVICE_ERROR ||
savedPRErrorCode2 == SEC_ERROR_PKCS11_DEVICE_ERROR)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("attempting no-module db init"));
// It would make sense to initialize NSS in read-only mode here since this
// is just a test to see if the PKCS#11 module DB being in FIPS mode is the
// problem, but for some reason the combination of read-only and no-moddb
// flags causes NSS initialization to fail, so unfortunately we have to use
// read-write mode.
srv = ::mozilla::psm::InitializeNSS(profilePath, NSSDBConfig::ReadWrite,
PKCS11DBConfig::DoNotLoadModules);
if (srv == SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("FIPS may be the problem"));
// Unload NSS so we can attempt to fix this situation for the user.
srv = NSS_Shutdown();
if (srv != SECSuccess) {
# ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
MOZ_CRASH_UNSAFE_PRINTF("InitializeNSSWithFallbacks failed: %d",
PR_GetError());
# endif
return NS_ERROR_FAILURE;
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("trying to rename module db"));
// If this fails non-catastrophically, we'll attempt to initialize NSS
// again in r/w then r-o mode (both of which will fail), and then we'll
// fall back to NSS_NoDB_Init, which is the behavior we want.
nsresult rv = AttemptToRenamePKCS11ModuleDB(profilePath);
if (NS_FAILED(rv)) {
# ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
// An nsresult is a uint32_t, but at least one of our compilers doesn't
// like this format string unless we include the cast. <shruggie emoji>
MOZ_CRASH_UNSAFE_PRINTF("InitializeNSSWithFallbacks failed: %u",
(uint32_t)rv);
# endif
return rv;
}
srv = ::mozilla::psm::InitializeNSS(profilePath, NSSDBConfig::ReadWrite,
PKCS11DBConfig::LoadModules);
if (srv == SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("initialized in r/w mode"));
return NS_OK;
}
srv = ::mozilla::psm::InitializeNSS(profilePath, NSSDBConfig::ReadOnly,
PKCS11DBConfig::LoadModules);
if (srv == SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("initialized in r-o mode"));
return NS_OK;
}
}
}
#endif
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("last-resort NSS_NoDB_Init"));
srv = NSS_NoDB_Init(nullptr);
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
if (srv != SECSuccess) {
MOZ_CRASH_UNSAFE_PRINTF("InitializeNSSWithFallbacks failed: %d",
PR_GetError());
}
#endif
return srv == SECSuccess ? NS_OK : NS_ERROR_FAILURE;
}
#if defined(NIGHTLY_BUILD) && !defined(ANDROID)
// dbType is either "cert9.db" or "key4.db"
void UnmigrateOneCertDB(const nsCOMPtr<nsIFile>& profileDirectory,
const nsACString& dbType) {
nsCOMPtr<nsIFile> dbFile;
nsresult rv = profileDirectory->Clone(getter_AddRefs(dbFile));
if (NS_FAILED(rv)) {
return;
}
rv = dbFile->AppendNative(dbType);
if (NS_FAILED(rv)) {
return;
}
bool exists;
rv = dbFile->Exists(&exists);
if (NS_FAILED(rv)) {
return;
}
// If the unprefixed DB already exists, don't overwrite it.
if (exists) {
return;
}
nsCOMPtr<nsIFile> prefixedDBFile;
rv = profileDirectory->Clone(getter_AddRefs(prefixedDBFile));
if (NS_FAILED(rv)) {
return;
}
nsAutoCString prefixedDBName("gecko-no-share-");
prefixedDBName.Append(dbType);
rv = prefixedDBFile->AppendNative(prefixedDBName);
if (NS_FAILED(rv)) {
return;
}
Unused << prefixedDBFile->MoveToNative(nullptr, dbType);
}
void UnmigrateFromPrefixedCertDBs() {
nsCOMPtr<nsIFile> profileDirectory;
nsresult rv = NS_GetSpecialDirectory(NS_APP_USER_PROFILE_50_DIR,
getter_AddRefs(profileDirectory));
if (NS_FAILED(rv)) {
return;
}
UnmigrateOneCertDB(profileDirectory, "cert9.db"_ns);
UnmigrateOneCertDB(profileDirectory, "key4.db"_ns);
}
#endif // defined(NIGHTLY_BUILD) && !defined(ANDROID)
nsresult nsNSSComponent::InitializeNSS() {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("nsNSSComponent::InitializeNSS\n"));
AUTO_PROFILER_LABEL("nsNSSComponent::InitializeNSS", OTHER);
AUTO_PROFILER_TRACING_MARKER("NSS", "nsNSSComponent::InitializeNSS", OTHER);
static_assert(
nsINSSErrorsService::NSS_SEC_ERROR_BASE == SEC_ERROR_BASE &&
nsINSSErrorsService::NSS_SEC_ERROR_LIMIT == SEC_ERROR_LIMIT &&
nsINSSErrorsService::NSS_SSL_ERROR_BASE == SSL_ERROR_BASE &&
nsINSSErrorsService::NSS_SSL_ERROR_LIMIT == SSL_ERROR_LIMIT,
"You must update the values in nsINSSErrorsService.idl");
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("NSS Initialization beginning\n"));
nsAutoCString profileStr;
nsresult rv = GetNSSProfilePath(profileStr);
MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(rv));
if (NS_FAILED(rv)) {
return NS_ERROR_NOT_AVAILABLE;
}
#if defined(NIGHTLY_BUILD) && !defined(ANDROID)
if (!profileStr.IsEmpty()) {
UnmigrateFromPrefixedCertDBs();
}
#endif
#if defined(XP_WIN) || (defined(XP_LINUX) && !defined(ANDROID))
SetNSSDatabaseCacheModeAsAppropriate();
#endif
bool nocertdb = Preferences::GetBool("security.nocertdb", false);
bool inSafeMode = true;
nsCOMPtr<nsIXULRuntime> runtime(do_GetService("@mozilla.org/xre/runtime;1"));
// There might not be an nsIXULRuntime in embedded situations. This will
// default to assuming we are in safe mode (as a result, no external PKCS11
// modules will be loaded).
if (runtime) {
rv = runtime->GetInSafeMode(&inSafeMode);
MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(rv));
if (NS_FAILED(rv)) {
return rv;
}
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("inSafeMode: %u\n", inSafeMode));
rv = InitializeNSSWithFallbacks(profileStr, nocertdb, inSafeMode);
MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(rv));
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("failed to initialize NSS"));
return rv;
}
PK11_SetPasswordFunc(PK11PasswordPrompt);
// Register an observer so we can inform NSS when these prefs change
Preferences::AddStrongObserver(this, "security.");
rv = CommonInit();
MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(rv));
if (NS_FAILED(rv)) {
return NS_ERROR_UNEXPECTED;
}
nsCOMPtr<nsICertOverrideService> certOverrideService(
do_GetService(NS_CERTOVERRIDE_CONTRACTID));
nsCOMPtr<nsIClientAuthRememberService> clientAuthRememberService(
do_GetService(NS_CLIENTAUTHREMEMBERSERVICE_CONTRACTID));
nsCOMPtr<nsISiteSecurityService> siteSecurityService(
do_GetService(NS_SSSERVICE_CONTRACTID));
nsCOMPtr<nsICertStorage> certStorage(do_GetService(NS_CERT_STORAGE_CID));
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("NSS Initialization done\n"));
{
MutexAutoLock lock(mMutex);
// ensure we have initial values for various root hashes
#ifdef DEBUG
mTestBuiltInRootHash.Truncate();
Preferences::GetString("security.test.built_in_root_hash",
mTestBuiltInRootHash);
#endif
mContentSigningRootHash.Truncate();
Preferences::GetCString("security.content.signature.root_hash",
mContentSigningRootHash);
mMitmCanaryIssuer.Truncate();
Preferences::GetString("security.pki.mitm_canary_issuer",
mMitmCanaryIssuer);
mMitmDetecionEnabled =
Preferences::GetBool("security.pki.mitm_canary_issuer.enabled", true);
// Set dynamic options from prefs.
setValidationOptions(true, lock);
bool importEnterpriseRoots =
Preferences::GetBool(kEnterpriseRootModePref, false);
uint32_t familySafetyMode =
Preferences::GetUint(kFamilySafetyModePref, kFamilySafetyModeDefault);
Vector<nsCString> possibleLoadableRootsLocations;
rv = ListPossibleLoadableRootsLocations(possibleLoadableRootsLocations);
MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(rv));
if (NS_FAILED(rv)) {
return rv;
}
bool loadOSClientCertsModule =
Preferences::GetBool(kOSClientCertsModulePref, false);
Maybe<nsCString> maybeOSClientCertsModuleLocation;
if (loadOSClientCertsModule) {
nsAutoCString libraryDir;
if (NS_SUCCEEDED(GetDirectoryPath(NS_GRE_BIN_DIR, libraryDir))) {
maybeOSClientCertsModuleLocation.emplace(libraryDir);
}
}
RefPtr<LoadLoadableCertsTask> loadLoadableCertsTask(
new LoadLoadableCertsTask(this, importEnterpriseRoots, familySafetyMode,
std::move(possibleLoadableRootsLocations),
std::move(maybeOSClientCertsModuleLocation)));
rv = loadLoadableCertsTask->Dispatch();
MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(rv));
if (NS_FAILED(rv)) {
return rv;
}
mLoadLoadableCertsTaskDispatched = true;
return NS_OK;
}
}
void nsNSSComponent::ShutdownNSS() {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("nsNSSComponent::ShutdownNSS\n"));
MOZ_RELEASE_ASSERT(NS_IsMainThread());
bool loadLoadableCertsTaskDispatched;
{
MutexAutoLock lock(mMutex);
loadLoadableCertsTaskDispatched = mLoadLoadableCertsTaskDispatched;
}
// We have to block until the load loadable certs task has completed, because
// otherwise we might try to unload the loaded modules while the loadable
// certs loading thread is setting up EV information, which can cause
// it to fail to find the roots it is expecting. However, if initialization
// failed, we won't have dispatched the load loadable certs background task.
// In that case, we don't want to block on an event that will never happen.
if (loadLoadableCertsTaskDispatched) {
Unused << BlockUntilLoadableCertsLoaded();
}
PK11_SetPasswordFunc((PK11PasswordFunc) nullptr);
Preferences::RemoveObserver(this, "security.");
if (mIntermediatePreloadingHealerTimer) {
mIntermediatePreloadingHealerTimer->Cancel();
mIntermediatePreloadingHealerTimer = nullptr;
}
// Release the default CertVerifier. This will cause any held NSS resources
// to be released.
MutexAutoLock lock(mMutex);
mDefaultCertVerifier = nullptr;
// We don't actually shut down NSS - XPCOM does, after all threads have been
// joined and the component manager has been shut down (and so there shouldn't
// be any XPCOM objects holding NSS resources).
}
// The aim of the intermediate preloading healer is to remove intermediates
// that were previously cached by PSM in the NSS certdb that are now preloaded
// in cert_storage. When cached by PSM, these certificates will have no
// particular trust set - they are intended to inherit their trust. If, upon
// examination, these certificates do have trust bits set that affect
// certificate validation, they must have been modified by the user, so we want
// to leave them alone.
bool CertHasDefaultTrust(CERTCertificate* cert) {
CERTCertTrust trust;
if (CERT_GetCertTrust(cert, &trust) != SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("CERT_GetCertTrust failed"));
return false;
}
// This is the active distrust test for CA certificates (this is expected to
// be an intermediate).
if ((trust.sslFlags & (CERTDB_TRUSTED_CA | CERTDB_TERMINAL_RECORD)) ==
CERTDB_TERMINAL_RECORD) {
return false;
}
// This is the trust anchor test.
if (trust.sslFlags & CERTDB_TRUSTED_CA) {
return false;
}
// This is the active distrust test for CA certificates (this is expected to
// be an intermediate).
if ((trust.emailFlags & (CERTDB_TRUSTED_CA | CERTDB_TERMINAL_RECORD)) ==
CERTDB_TERMINAL_RECORD) {
return false;
}
// This is the trust anchor test.
if (trust.emailFlags & CERTDB_TRUSTED_CA) {
return false;
}
return true;
}
void IntermediatePreloadingHealerCallback(nsITimer*, void*) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("IntermediatePreloadingHealerCallback"));
if (AppShutdown::IsShuttingDown()) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("Exiting healer due to app shutdown"));
return;
}
// Get the slot corresponding to the NSS certdb.
UniquePK11SlotInfo softokenSlot(PK11_GetInternalKeySlot());
if (!softokenSlot) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("PK11_GetInternalKeySlot failed"));
return;
}
// List the certificates in the NSS certdb.
UniqueCERTCertList softokenCertificates(
PK11_ListCertsInSlot(softokenSlot.get()));
if (!softokenCertificates) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("PK11_ListCertsInSlot failed"));
return;
}
nsCOMPtr<nsICertStorage> certStorage(do_GetService(NS_CERT_STORAGE_CID));
if (!certStorage) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("couldn't get cert_storage"));
return;
}
Vector<UniqueCERTCertificate> certsToDelete;
// For each certificate, look it up in cert_storage. If there's a match, this
// is a preloaded intermediate.
for (CERTCertListNode* n = CERT_LIST_HEAD(softokenCertificates);
!CERT_LIST_END(n, softokenCertificates); n = CERT_LIST_NEXT(n)) {
if (AppShutdown::IsShuttingDown()) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("Exiting healer due to app shutdown"));
return;
}
nsTArray<uint8_t> subject;
subject.AppendElements(n->cert->derSubject.data, n->cert->derSubject.len);
nsTArray<nsTArray<uint8_t>> certs;
nsresult rv = certStorage->FindCertsBySubject(subject, certs);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("FindCertsBySubject failed"));
break;
}
for (const auto& encodedCert : certs) {
if (encodedCert.Length() != n->cert->derCert.len) {
continue;
}
if (memcmp(encodedCert.Elements(), n->cert->derCert.data,
encodedCert.Length()) != 0) {
continue;
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("found preloaded intermediate in certdb"));
if (!CertHasDefaultTrust(n->cert)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("certificate doesn't have default trust - skipping"));
continue;
}
UniqueCERTCertificate certCopy(CERT_DupCertificate(n->cert));
if (!certCopy) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("CERT_DupCertificate failed"));
continue;
}
// Note that we want to remove this certificate from the NSS certdb
// because it also exists in preloaded intermediate storage and is thus
// superfluous.
if (!certsToDelete.append(std::move(certCopy))) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("append failed - out of memory?"));
return;
}
break;
}
// Only delete 20 at a time.
if (certsToDelete.length() >= 20) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("found limit of 20 preloaded intermediates in certdb"));
break;
}
}
for (const auto& certToDelete : certsToDelete) {
if (AppShutdown::IsShuttingDown()) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("Exiting healer due to app shutdown"));
return;
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("attempting to delete preloaded intermediate '%s'",
certToDelete->subjectName));
if (SEC_DeletePermCertificate(certToDelete.get()) != SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("SEC_DeletePermCertificate failed"));
}
}
// This is for tests - notify that this ran.
nsCOMPtr<nsIRunnable> runnable(NS_NewRunnableFunction(
"IntermediatePreloadingHealerCallbackDone", []() -> void {
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->NotifyObservers(
nullptr, "psm:intermediate-preloading-healer-ran", nullptr);
}
}));
Unused << NS_DispatchToMainThread(runnable.forget());
}
nsresult nsNSSComponent::Init() {
MOZ_RELEASE_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return NS_ERROR_NOT_SAME_THREAD;
}
MOZ_ASSERT(XRE_IsParentProcess());
if (!XRE_IsParentProcess()) {
return NS_ERROR_NOT_AVAILABLE;
}
Telemetry::AutoScalarTimer<Telemetry::ScalarID::NETWORKING_NSS_INITIALIZATION>
timer;
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("Beginning NSS initialization\n"));
nsresult rv = InitializeNSS();
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Error,
("nsNSSComponent::InitializeNSS() failed\n"));
return rv;
}
rv = RegisterObservers();
if (NS_FAILED(rv)) {
return rv;
}
rv = MaybeEnableIntermediatePreloadingHealer();
if (NS_FAILED(rv)) {
return rv;
}
return NS_OK;
}
nsresult nsNSSComponent::MaybeEnableIntermediatePreloadingHealer() {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("nsNSSComponent::MaybeEnableIntermediatePreloadingHealer"));
MOZ_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return NS_ERROR_NOT_SAME_THREAD;
}
if (mIntermediatePreloadingHealerTimer) {
mIntermediatePreloadingHealerTimer->Cancel();
mIntermediatePreloadingHealerTimer = nullptr;
}
if (!Preferences::GetBool("security.intermediate_preloading_healer.enabled",
false)) {
return NS_OK;
}
if (!mIntermediatePreloadingHealerTaskQueue) {
nsresult rv = NS_CreateBackgroundTaskQueue(
"IntermediatePreloadingHealer",
getter_AddRefs(mIntermediatePreloadingHealerTaskQueue));
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Error,
("NS_CreateBackgroundTaskQueue failed"));
return rv;
}
}
uint32_t timerDelayMS = Preferences::GetUint(
"security.intermediate_preloading_healer.timer_interval_ms",
5 * 60 * 1000);
nsresult rv = NS_NewTimerWithFuncCallback(
getter_AddRefs(mIntermediatePreloadingHealerTimer),
IntermediatePreloadingHealerCallback, nullptr, timerDelayMS,
nsITimer::TYPE_REPEATING_SLACK_LOW_PRIORITY,
"IntermediatePreloadingHealer", mIntermediatePreloadingHealerTaskQueue);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Error,
("NS_NewTimerWithFuncCallback failed"));
return rv;
}
return NS_OK;
}
// nsISupports Implementation for the class
NS_IMPL_ISUPPORTS(nsNSSComponent, nsINSSComponent, nsIObserver)
static const char* const PROFILE_BEFORE_CHANGE_TOPIC = "profile-before-change";
NS_IMETHODIMP
nsNSSComponent::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* someData) {
// In some tests, we don't receive a "profile-before-change" topic. However,
// we still have to shut down before the storage service shuts down, because
// closing the sql-backed softoken requires sqlite still be available. Thus,
// we observe "xpcom-shutdown" just in case.
if (nsCRT::strcmp(aTopic, PROFILE_BEFORE_CHANGE_TOPIC) == 0 ||
nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID) == 0) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("receiving profile change or XPCOM shutdown notification"));
ShutdownNSS();
} else if (nsCRT::strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID) == 0) {
bool clearSessionCache = true;
NS_ConvertUTF16toUTF8 prefName(someData);
if (HandleTLSPrefChange(prefName)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("HandleTLSPrefChange done"));
} else if (prefName.EqualsLiteral("security.OCSP.enabled") ||
prefName.EqualsLiteral("security.OCSP.require") ||
prefName.EqualsLiteral(
"security.pki.cert_short_lifetime_in_days") ||
prefName.EqualsLiteral("security.ssl.enable_ocsp_stapling") ||
prefName.EqualsLiteral("security.ssl.enable_ocsp_must_staple") ||
prefName.EqualsLiteral(
"security.pki.certificate_transparency.mode") ||
prefName.EqualsLiteral("security.pki.sha1_enforcement_level") ||
prefName.EqualsLiteral("security.pki.name_matching_mode") ||
prefName.EqualsLiteral("security.pki.netscape_step_up_policy") ||
prefName.EqualsLiteral(
"security.OCSP.timeoutMilliseconds.soft") ||
prefName.EqualsLiteral(
"security.OCSP.timeoutMilliseconds.hard") ||
prefName.EqualsLiteral("security.pki.crlite_mode") ||
prefName.EqualsLiteral(
"security.pki.crlite_ct_merge_delay_seconds")) {
MutexAutoLock lock(mMutex);
setValidationOptions(false, lock);
#ifdef DEBUG
} else if (prefName.EqualsLiteral("security.test.built_in_root_hash")) {
MutexAutoLock lock(mMutex);
mTestBuiltInRootHash.Truncate();
Preferences::GetString("security.test.built_in_root_hash",
mTestBuiltInRootHash);
#endif // DEBUG
} else if (prefName.EqualsLiteral("security.content.signature.root_hash")) {
MutexAutoLock lock(mMutex);
mContentSigningRootHash.Truncate();
Preferences::GetCString("security.content.signature.root_hash",
mContentSigningRootHash);
} else if (prefName.Equals(kEnterpriseRootModePref) ||
prefName.Equals(kFamilySafetyModePref)) {
UnloadEnterpriseRoots();
MaybeImportEnterpriseRoots();
} else if (prefName.Equals(kOSClientCertsModulePref)) {
bool loadOSClientCertsModule =
Preferences::GetBool(kOSClientCertsModulePref, false);
AsyncLoadOrUnloadOSClientCertsModule(loadOSClientCertsModule);
} else if (prefName.EqualsLiteral("security.pki.mitm_canary_issuer")) {
MutexAutoLock lock(mMutex);
mMitmCanaryIssuer.Truncate();
Preferences::GetString("security.pki.mitm_canary_issuer",
mMitmCanaryIssuer);
} else if (prefName.EqualsLiteral(
"security.pki.mitm_canary_issuer.enabled")) {
MutexAutoLock lock(mMutex);
mMitmDetecionEnabled =
Preferences::GetBool("security.pki.mitm_canary_issuer.enabled", true);
} else {
clearSessionCache = false;
}
if (clearSessionCache) {
ClearSSLExternalAndInternalSessionCache();
}
// Preferences that don't affect certificate verification.
if (prefName.Equals("security.intermediate_preloading_healer.enabled") ||
prefName.Equals(
"security.intermediate_preloading_healer.timer_interval_ms")) {
MaybeEnableIntermediatePreloadingHealer();
}
}
return NS_OK;
}
/*static*/
nsresult nsNSSComponent::GetNewPrompter(nsIPrompt** result) {
NS_ENSURE_ARG_POINTER(result);
*result = nullptr;
if (!NS_IsMainThread()) {
NS_ERROR("nsSDRContext::GetNewPrompter called off the main thread");
return NS_ERROR_NOT_SAME_THREAD;
}
nsresult rv;
nsCOMPtr<nsIWindowWatcher> wwatch(
do_GetService(NS_WINDOWWATCHER_CONTRACTID, &rv));
NS_ENSURE_SUCCESS(rv, rv);
rv = wwatch->GetNewPrompter(0, result);
NS_ENSURE_SUCCESS(rv, rv);
return rv;
}
nsresult nsNSSComponent::LogoutAuthenticatedPK11() {
nsCOMPtr<nsICertOverrideService> icos =
do_GetService("@mozilla.org/security/certoverride;1");
if (icos) {
icos->ClearValidityOverride("all:temporary-certificates"_ns, 0,
OriginAttributes());
}
ClearSSLExternalAndInternalSessionCache();
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (os) {
os->NotifyObservers(nullptr, "net:cancel-all-connections", nullptr);
}
return NS_OK;
}
nsresult nsNSSComponent::RegisterObservers() {
nsCOMPtr<nsIObserverService> observerService(
do_GetService("@mozilla.org/observer-service;1"));
if (!observerService) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("nsNSSComponent: couldn't get observer service\n"));
return NS_ERROR_FAILURE;
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("nsNSSComponent: adding observers\n"));
// Using false for the ownsweak parameter means the observer service will
// keep a strong reference to this component. As a result, this will live at
// least as long as the observer service.
observerService->AddObserver(this, PROFILE_BEFORE_CHANGE_TOPIC, false);
observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
return NS_OK;
}
NS_IMETHODIMP
nsNSSComponent::IsCertTestBuiltInRoot(CERTCertificate* cert, bool* result) {
NS_ENSURE_ARG_POINTER(cert);
NS_ENSURE_ARG_POINTER(result);
*result = false;
#ifdef DEBUG
RefPtr<nsNSSCertificate> nsc = nsNSSCertificate::Create(cert);
if (!nsc) {
return NS_ERROR_FAILURE;
}
nsAutoString certHash;
nsresult rv = nsc->GetSha256Fingerprint(certHash);
if (NS_FAILED(rv)) {
return rv;
}
MutexAutoLock lock(mMutex);
if (mTestBuiltInRootHash.IsEmpty()) {
return NS_OK;
}
*result = mTestBuiltInRootHash.Equals(certHash);
#endif // DEBUG
return NS_OK;
}
NS_IMETHODIMP
nsNSSComponent::IsCertContentSigningRoot(const nsTArray<uint8_t>& cert,
bool* result) {
NS_ENSURE_ARG_POINTER(result);
*result = false;
if (cert.Length() > std::numeric_limits<uint32_t>::max()) {
return NS_ERROR_INVALID_ARG;
}
nsTArray<uint8_t> digestArray;
nsresult rv = Digest::DigestBuf(SEC_OID_SHA256, cert.Elements(),
cert.Length(), digestArray);
if (NS_FAILED(rv)) {
return rv;
}
SECItem digestItem = {siBuffer, digestArray.Elements(),
static_cast<unsigned int>(digestArray.Length())};
UniquePORTString fingerprintCString(
CERT_Hexify(&digestItem, true /* use colon delimiters */));
if (!fingerprintCString) {
return NS_ERROR_FAILURE;
}
MutexAutoLock lock(mMutex);
*result = mContentSigningRootHash.Equals(fingerprintCString.get());
return NS_OK;
}
NS_IMETHODIMP
nsNSSComponent::IssuerMatchesMitmCanary(const char* aCertIssuer) {
MutexAutoLock lock(mMutex);
if (mMitmDetecionEnabled && !mMitmCanaryIssuer.IsEmpty()) {
nsString certIssuer = NS_ConvertUTF8toUTF16(aCertIssuer);
if (mMitmCanaryIssuer.Equals(certIssuer)) {
return NS_OK;
}
}
return NS_ERROR_FAILURE;
}
SharedCertVerifier::~SharedCertVerifier() = default;
NS_IMETHODIMP
nsNSSComponent::GetDefaultCertVerifier(SharedCertVerifier** result) {
MutexAutoLock lock(mMutex);
NS_ENSURE_ARG_POINTER(result);
RefPtr<SharedCertVerifier> certVerifier(mDefaultCertVerifier);
certVerifier.forget(result);
return NS_OK;
}
// static
void nsNSSComponent::DoClearSSLExternalAndInternalSessionCache() {
SSL_ClearSessionCache();
mozilla::net::SSLTokensCache::Clear();
}
NS_IMETHODIMP
nsNSSComponent::ClearSSLExternalAndInternalSessionCache() {
MOZ_ASSERT(XRE_IsParentProcess());
if (!XRE_IsParentProcess()) {
return NS_ERROR_NOT_AVAILABLE;
}
if (mozilla::net::nsIOService::UseSocketProcess()) {
if (mozilla::net::gIOService) {
mozilla::net::gIOService->CallOrWaitForSocketProcess([]() {
Unused << mozilla::net::SocketProcessParent::GetSingleton()
->SendClearSessionCache();
});
}
}
DoClearSSLExternalAndInternalSessionCache();
return NS_OK;
}
namespace mozilla {
namespace psm {
already_AddRefed<SharedCertVerifier> GetDefaultCertVerifier() {
static NS_DEFINE_CID(kNSSComponentCID, NS_NSSCOMPONENT_CID);
nsCOMPtr<nsINSSComponent> nssComponent(do_GetService(kNSSComponentCID));
if (!nssComponent) {
return nullptr;
}
nsresult rv = nssComponent->BlockUntilLoadableCertsLoaded();
if (NS_FAILED(rv)) {
return nullptr;
}
RefPtr<SharedCertVerifier> result;
rv = nssComponent->GetDefaultCertVerifier(getter_AddRefs(result));
if (NS_FAILED(rv)) {
return nullptr;
}
return result.forget();
}
// Helper for FindClientCertificatesWithPrivateKeys. Copies all
// CERTCertificates from `from` to `to`.
static inline void CopyCertificatesTo(UniqueCERTCertList& from,
UniqueCERTCertList& to) {
MOZ_ASSERT(from);
MOZ_ASSERT(to);
for (CERTCertListNode* n = CERT_LIST_HEAD(from.get());
!CERT_LIST_END(n, from.get()); n = CERT_LIST_NEXT(n)) {
UniqueCERTCertificate cert(CERT_DupCertificate(n->cert));
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
(" provisionally adding '%s'", n->cert->subjectName));
if (CERT_AddCertToListTail(to.get(), cert.get()) == SECSuccess) {
Unused << cert.release();
}
}
}
// Lists all private keys on all modules and returns a list of any corresponding
// client certificates. Returns null if no such certificates can be found. Also
// returns null if an error is encountered, because this is called as part of
// the client auth data callback, and NSS ignores any errors returned by the
// callback.
UniqueCERTCertList FindClientCertificatesWithPrivateKeys() {
TimeStamp begin(TimeStamp::Now());
auto exitTelemetry = MakeScopeExit([&] {
Telemetry::AccumulateTimeDelta(Telemetry::CLIENT_CERTIFICATE_SCAN_TIME,
begin, TimeStamp::Now());
});
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("FindClientCertificatesWithPrivateKeys"));
BlockUntilLoadableCertsLoaded();
UniqueCERTCertList certsWithPrivateKeys(CERT_NewCertList());
if (!certsWithPrivateKeys) {
return nullptr;
}
UniquePK11SlotInfo internalSlot(PK11_GetInternalKeySlot());
AutoSECMODListReadLock secmodLock;
SECMODModuleList* list = SECMOD_GetDefaultModuleList();
while (list) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
(" module '%s'", list->module->commonName));
for (int i = 0; i < list->module->slotCount; i++) {
PK11SlotInfo* slot = list->module->slots[i];
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
(" slot '%s'", PK11_GetSlotName(slot)));
// If this is the internal certificate/key slot, there may be many more
// certificates than private keys, so search by private keys.
if (internalSlot.get() == slot) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
(" (looking at internal slot)"));
if (PK11_Authenticate(slot, true, nullptr) != SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, (" (couldn't authenticate)"));
continue;
}
UniqueSECKEYPrivateKeyList privateKeys(
PK11_ListPrivKeysInSlot(slot, nullptr, nullptr));
if (!privateKeys) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, (" (no private keys)"));
continue;
}
for (SECKEYPrivateKeyListNode* node = PRIVKEY_LIST_HEAD(privateKeys);
!PRIVKEY_LIST_END(node, privateKeys);
node = PRIVKEY_LIST_NEXT(node)) {
UniqueCERTCertList certs(PK11_GetCertsMatchingPrivateKey(node->key));
if (!certs) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
(" PK11_GetCertsMatchingPrivateKey encountered an "
"error "));
continue;
}
if (CERT_LIST_EMPTY(certs)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, (" (no certs for key)"));
continue;
}
CopyCertificatesTo(certs, certsWithPrivateKeys);
}
} else {
// ... otherwise, optimistically assume that searching by certificate
// won't take too much time. Since "friendly" slots expose certificates
// without needing to be authenticated to, this results in fewer PIN
// dialogs shown to the user.
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
(" (looking at non-internal slot)"));
if (!PK11_IsPresent(slot)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, (" (not present)"));
continue;
}
// If this isn't a "friendly" slot, authenticate to expose certificates.
if (!PK11_IsFriendly(slot) &&
PK11_Authenticate(slot, true, nullptr) != SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, (" (couldn't authenticate)"));
continue;
}
UniqueCERTCertList certsInSlot(PK11_ListCertsInSlot(slot));
if (!certsInSlot) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
(" (couldn't list certs in slot)"));
continue;
}
// When NSS decodes a certificate, if that certificate has a
// corresponding private key (or public key, if the slot it's on hasn't
// been logged into), it notes it as a "user cert".
if (CERT_FilterCertListForUserCerts(certsInSlot.get()) != SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
(" (couldn't filter certs)"));
continue;
}
CopyCertificatesTo(certsInSlot, certsWithPrivateKeys);
}
}
list = list->next;
}
if (CERT_FilterCertListByUsage(certsWithPrivateKeys.get(), certUsageSSLClient,
false) != SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
(" CERT_FilterCertListByUsage encountered an error - returning"));
return nullptr;
}
if (MOZ_UNLIKELY(MOZ_LOG_TEST(gPIPNSSLog, LogLevel::Debug))) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, (" returning:"));
for (CERTCertListNode* n = CERT_LIST_HEAD(certsWithPrivateKeys);
!CERT_LIST_END(n, certsWithPrivateKeys); n = CERT_LIST_NEXT(n)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, (" %s", n->cert->subjectName));
}
}
if (CERT_LIST_EMPTY(certsWithPrivateKeys)) {
return nullptr;
}
return certsWithPrivateKeys;
}
} // namespace psm
} // namespace mozilla
NS_IMPL_ISUPPORTS(PipUIContext, nsIInterfaceRequestor)
PipUIContext::PipUIContext() = default;
PipUIContext::~PipUIContext() = default;
NS_IMETHODIMP
PipUIContext::GetInterface(const nsIID& uuid, void** result) {
NS_ENSURE_ARG_POINTER(result);
*result = nullptr;
if (!NS_IsMainThread()) {
NS_ERROR("PipUIContext::GetInterface called off the main thread");
return NS_ERROR_NOT_SAME_THREAD;
}
if (!uuid.Equals(NS_GET_IID(nsIPrompt))) return NS_ERROR_NO_INTERFACE;
nsIPrompt* prompt = nullptr;
nsresult rv = nsNSSComponent::GetNewPrompter(&prompt);
*result = prompt;
return rv;
}
nsresult getNSSDialogs(void** _result, REFNSIID aIID, const char* contract) {
if (!NS_IsMainThread()) {
NS_ERROR("getNSSDialogs called off the main thread");
return NS_ERROR_NOT_SAME_THREAD;
}
nsresult rv;
nsCOMPtr<nsISupports> svc = do_GetService(contract, &rv);
if (NS_FAILED(rv)) {
return rv;
}
rv = svc->QueryInterface(aIID, _result);
return rv;
}
nsresult setPassword(PK11SlotInfo* slot, nsIInterfaceRequestor* ctx) {
MOZ_ASSERT(slot);
MOZ_ASSERT(ctx);
NS_ENSURE_ARG_POINTER(slot);
NS_ENSURE_ARG_POINTER(ctx);
if (PK11_NeedUserInit(slot)) {
nsCOMPtr<nsITokenPasswordDialogs> dialogs;
nsresult rv = getNSSDialogs(getter_AddRefs(dialogs),
NS_GET_IID(nsITokenPasswordDialogs),
NS_TOKENPASSWORDSDIALOG_CONTRACTID);
if (NS_FAILED(rv)) {
return rv;
}
bool canceled;
nsCOMPtr<nsIPK11Token> token = new nsPK11Token(slot);
rv = dialogs->SetPassword(ctx, token, &canceled);
if (NS_FAILED(rv)) {
return rv;
}
if (canceled) {
return NS_ERROR_NOT_AVAILABLE;
}
}
return NS_OK;
}
static PRBool ConvertBetweenUCS2andASCII(PRBool toUnicode, unsigned char* inBuf,
unsigned int inBufLen,
unsigned char* outBuf,
unsigned int maxOutBufLen,
unsigned int* outBufLen,
PRBool swapBytes) {
std::unique_ptr<unsigned char[]> inBufDup(new unsigned char[inBufLen]);
if (!inBufDup) {
return PR_FALSE;
}
std::memcpy(inBufDup.get(), inBuf, inBufLen * sizeof(unsigned char));
// If converting Unicode to ASCII, swap bytes before conversion as neccessary.
if (!toUnicode && swapBytes) {
if (inBufLen % 2 != 0) {
return PR_FALSE;
}
mozilla::NativeEndian::swapFromLittleEndianInPlace(
reinterpret_cast<char16_t*>(inBufDup.get()), inBufLen / 2);
}
return PORT_UCS2_UTF8Conversion(toUnicode, inBufDup.get(), inBufLen, outBuf,
maxOutBufLen, outBufLen);
}
namespace mozilla {
namespace psm {
nsresult InitializeCipherSuite() {
MOZ_ASSERT(NS_IsMainThread(),
"InitializeCipherSuite() can only be accessed on the main thread");
if (NSS_SetDomesticPolicy() != SECSuccess) {
return NS_ERROR_FAILURE;
}
// Disable any ciphers that NSS might have enabled by default
for (uint16_t i = 0; i < SSL_NumImplementedCiphers; ++i) {
uint16_t cipher_id = SSL_ImplementedCiphers[i];
SSL_CipherPrefSetDefault(cipher_id, false);
}
// Now only set SSL/TLS ciphers we knew about at compile time
for (const auto& cipherPref : sCipherPrefs) {
bool cipherEnabled =
Preferences::GetBool(cipherPref.pref, cipherPref.enabledByDefault);
SSL_CipherPrefSetDefault(cipherPref.id, cipherEnabled);
}
SetDeprecatedTLS1CipherPrefs();
// Enable ciphers for PKCS#12
SEC_PKCS12EnableCipher(PKCS12_RC4_40, 1);
SEC_PKCS12EnableCipher(PKCS12_RC4_128, 1);
SEC_PKCS12EnableCipher(PKCS12_RC2_CBC_40, 1);
SEC_PKCS12EnableCipher(PKCS12_RC2_CBC_128, 1);
SEC_PKCS12EnableCipher(PKCS12_DES_56, 1);
SEC_PKCS12EnableCipher(PKCS12_DES_EDE3_168, 1);
SEC_PKCS12EnableCipher(PKCS12_AES_CBC_128, 1);
SEC_PKCS12EnableCipher(PKCS12_AES_CBC_192, 1);
SEC_PKCS12EnableCipher(PKCS12_AES_CBC_256, 1);
SEC_PKCS12SetPreferredCipher(PKCS12_DES_EDE3_168, 1);
PORT_SetUCS2_ASCIIConversionFunction(ConvertBetweenUCS2andASCII);
// PSM enforces a minimum RSA key size of 1024 bits, which is overridable.
// NSS has its own minimum, which is not overridable (the default is 1023
// bits). This sets the NSS minimum to 512 bits so users can still connect to
// devices like wifi routers with woefully small keys (they would have to add
// an override to do so, but they already do for such devices).
NSS_OptionSet(NSS_RSA_MIN_KEY_SIZE, 512);
// Observe preference change around cipher suite setting.
return CipherSuiteChangeObserver::StartObserve();
}
} // namespace psm
} // namespace mozilla
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