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gecko-dev/security/manager/ssl/nsNSSComponent.cpp

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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 "EnterpriseRoots.h"
#include "ExtendedValidation.h"
#include "NSSCertDBTrustDomain.h"
#include "PKCS11ModuleDB.h"
#include "ScopedNSSTypes.h"
#include "SharedSSLState.h"
#include "cert.h"
#include "certdb.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/Assertions.h"
#include "mozilla/Casting.h"
#include "mozilla/Preferences.h"
#include "mozilla/PodOperations.h"
#include "mozilla/PublicSSL.h"
#include "mozilla/Services.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 "nsAppDirectoryServiceDefs.h"
#include "nsCRT.h"
#include "nsClientAuthRemember.h"
#include "nsComponentManagerUtils.h"
#include "nsDirectoryServiceDefs.h"
#include "nsICertOverrideService.h"
#include "nsIFile.h"
#include "nsILocalFileWin.h"
#include "nsIObserverService.h"
#include "nsIPrompt.h"
#include "nsIProperties.h"
#include "nsISiteSecurityService.h"
#include "nsITokenPasswordDialogs.h"
#include "nsIWindowWatcher.h"
#include "nsIXULRuntime.h"
#include "nsLiteralString.h"
#include "nsNSSCertificateDB.h"
#include "nsNSSHelper.h"
#include "nsPK11TokenDB.h"
#include "nsPrintfCString.h"
#include "nsServiceManagerUtils.h"
#include "nsThreadUtils.h"
#include "nsXULAppAPI.h"
#include "nss.h"
#include "p12plcy.h"
#include "pkix/pkixnss.h"
#include "secerr.h"
#include "secmod.h"
#include "ssl.h"
#include "sslerr.h"
#include "sslproto.h"
#include "prmem.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;
// This function can be called from chrome or content 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 (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;
static void
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);
SSL_ClearSessionCache();
}
nsNSSComponent::nsNSSComponent()
: mLoadableRootsLoadedMonitor("nsNSSComponent.mLoadableRootsLoadedMonitor")
, mLoadableRootsLoaded(false)
, mLoadableRootsLoadedResult(NS_ERROR_FAILURE)
, mMutex("nsNSSComponent.mMutex")
, mNSSInitialized(false)
, mMitmDetecionEnabled(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,
wchar_t* optionalChildName,
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;
NS_NAMED_LITERAL_STRING(familySafetyPath,
"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Parental Controls");
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;
}
NS_NAMED_LITERAL_STRING(usersString, "Users");
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(NS_LITERAL_STRING("Parental Controls On"),
&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;
}
nsresult
nsNSSComponent::MaybeImportFamilySafetyRoot(PCCERT_CONTEXT certificate,
bool& wasFamilySafetyRoot)
{
MutexAutoLock lock(mMutex);
MOZ_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return NS_ERROR_NOT_SAME_THREAD;
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("MaybeImportFamilySafetyRoot"));
wasFamilySafetyRoot = false;
UniqueCERTCertificate nssCertificate(
PCCERT_CONTEXTToCERTCertificate(certificate));
if (!nssCertificate) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("couldn't decode certificate"));
return NS_ERROR_FAILURE;
}
// Looking for a certificate with the common name 'Microsoft Family Safety'
UniquePORTString subjectName(CERT_GetCommonName(&nssCertificate->subject));
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("subject name is '%s'", subjectName.get()));
if (kMicrosoftFamilySafetyCN.Equals(subjectName.get())) {
wasFamilySafetyRoot = true;
MOZ_ASSERT(!mFamilySafetyRoot);
mFamilySafetyRoot = std::move(nssCertificate);
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("added Family Safety root"));
}
return NS_OK;
}
nsresult
nsNSSComponent::LoadFamilySafetyRoot()
{
ScopedCertStore certstore(
CertOpenSystemStore(0, kWindowsDefaultRootStoreName));
if (!certstore.get()) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("couldn't get certstore '%S'", kWindowsDefaultRootStoreName));
return NS_ERROR_FAILURE;
}
// Any resources held by the certificate are released by the next call to
// CertFindCertificateInStore.
PCCERT_CONTEXT certificate = nullptr;
while ((certificate = CertFindCertificateInStore(certstore.get(),
X509_ASN_ENCODING, 0,
CERT_FIND_ANY, nullptr,
certificate))) {
bool wasFamilySafetyRoot = false;
nsresult rv = MaybeImportFamilySafetyRoot(certificate,
wasFamilySafetyRoot);
if (NS_SUCCEEDED(rv) && wasFamilySafetyRoot) {
return NS_OK; // We're done (we're only expecting one root).
}
}
return NS_ERROR_FAILURE;
}
#endif // XP_WIN
void
nsNSSComponent::UnloadFamilySafetyRoot()
{
MOZ_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return;
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("UnloadFamilySafetyRoot"));
// We can't call ChangeCertTrustWithPossibleAuthentication while holding
// mMutex (because it could potentially call back in to nsNSSComponent and
// attempt to acquire mMutex), so we move mFamilySafetyRoot out of
// nsNSSComponent into a local handle. This has the side-effect of clearing
// mFamilySafetyRoot, which is what we want anyway.
UniqueCERTCertificate familySafetyRoot;
{
MutexAutoLock lock(mMutex);
if (!mFamilySafetyRoot) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("Family Safety Root wasn't present"));
return;
}
familySafetyRoot = std::move(mFamilySafetyRoot);
MOZ_ASSERT(!mFamilySafetyRoot);
}
MOZ_ASSERT(familySafetyRoot);
// It would be intuitive to set the trust to { 0, 0, 0 } here. However, this
// doesn't work for temporary certificates because CERT_ChangeCertTrust first
// looks up the current trust settings in the permanent cert database, finds
// that such trust doesn't exist, considers the current trust to be
// { 0, 0, 0 }, and decides that it doesn't need to update the trust since
// they're the same. To work around this, we set a non-zero flag to ensure
// that the trust will get updated.
CERTCertTrust trust = { CERTDB_USER, 0, 0 };
if (ChangeCertTrustWithPossibleAuthentication(familySafetyRoot, trust,
nullptr) != SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("couldn't untrust certificate for TLS server auth"));
}
}
// The supported values of this pref are:
// 0: disable detecting Family Safety mode and importing the root
// 1: only attempt to detect Family Safety mode (don't import the root)
// 2: detect Family Safety mode and import the root
const char* kFamilySafetyModePref = "security.family_safety.mode";
// The telemetry gathered by this function is as follows:
// 0-2: the value of the Family Safety mode pref
// 3: detecting Family Safety mode failed
// 4: Family Safety was not enabled
// 5: Family Safety was enabled
// 6: failed to import the Family Safety root
// 7: successfully imported the root
void
nsNSSComponent::MaybeEnableFamilySafetyCompatibility()
{
#ifdef XP_WIN
if (!(IsWin8Point1OrLater() && !IsWin10OrLater())) {
return;
}
// Detect but don't import by default.
uint32_t familySafetyMode = Preferences::GetUint(kFamilySafetyModePref, 1);
if (familySafetyMode > 2) {
familySafetyMode = 0;
}
if (familySafetyMode == 0) {
return;
}
bool familySafetyEnabled;
nsresult rv = AccountHasFamilySafetyEnabled(familySafetyEnabled);
if (NS_FAILED(rv)) {
return;
}
if (!familySafetyEnabled) {
return;
}
if (familySafetyMode == 2) {
rv = LoadFamilySafetyRoot();
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("failed to load Family Safety root"));
}
}
#endif // XP_WIN
}
void
nsNSSComponent::UnloadEnterpriseRoots()
{
MOZ_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return;
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("UnloadEnterpriseRoots"));
// We can't call ChangeCertTrustWithPossibleAuthentication while holding
// mMutex (because it could potentially call back in to nsNSSComponent and
// attempt to acquire mMutex), so we move mEnterpriseRoots out of
// nsNSSComponent into a local handle. This has the side-effect of clearing
// mEnterpriseRoots, which is what we want anyway.
UniqueCERTCertList enterpriseRoots;
{
MutexAutoLock lock(mMutex);
if (!mEnterpriseRoots) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("no enterprise roots were present"));
return;
}
enterpriseRoots = std::move(mEnterpriseRoots);
MOZ_ASSERT(!mEnterpriseRoots);
}
MOZ_ASSERT(enterpriseRoots);
// It would be intuitive to set the trust to { 0, 0, 0 } here. However, this
// doesn't work for temporary certificates because CERT_ChangeCertTrust first
// looks up the current trust settings in the permanent cert database, finds
// that such trust doesn't exist, considers the current trust to be
// { 0, 0, 0 }, and decides that it doesn't need to update the trust since
// they're the same. To work around this, we set a non-zero flag to ensure
// that the trust will get updated.
CERTCertTrust trust = { CERTDB_USER, 0, 0 };
for (CERTCertListNode* n = CERT_LIST_HEAD(enterpriseRoots.get());
!CERT_LIST_END(n, enterpriseRoots.get()); n = CERT_LIST_NEXT(n)) {
if (!n) {
break;
}
if (!n->cert) {
continue;
}
UniqueCERTCertificate cert(CERT_DupCertificate(n->cert));
if (ChangeCertTrustWithPossibleAuthentication(cert, trust, nullptr)
!= SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("couldn't untrust certificate for TLS server auth"));
}
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("unloaded enterprise roots"));
}
static const char* kEnterpriseRootModePref = "security.enterprise_roots.enabled";
void
nsNSSComponent::MaybeImportEnterpriseRoots()
{
MOZ_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return;
}
bool importEnterpriseRoots = Preferences::GetBool(kEnterpriseRootModePref,
false);
if (!importEnterpriseRoots) {
return;
}
UniqueCERTCertList roots;
nsresult rv = GatherEnterpriseRoots(roots);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("failed gathering enterprise roots"));
return;
}
{
MutexAutoLock lock(mMutex);
MOZ_ASSERT(!mEnterpriseRoots);
mEnterpriseRoots = std::move(roots);
}
}
NS_IMETHODIMP
nsNSSComponent::TrustLoaded3rdPartyRoots()
{
// We can't call ChangeCertTrustWithPossibleAuthentication while holding
// mMutex (because it could potentially call back in to nsNSSComponent and
// attempt to acquire mMutex), so we copy mEnterpriseRoots.
UniqueCERTCertList enterpriseRoots;
{
MutexAutoLock lock(mMutex);
if (mEnterpriseRoots) {
enterpriseRoots = nsNSSCertList::DupCertList(mEnterpriseRoots);
if (!enterpriseRoots) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
}
CERTCertTrust trust = {
CERTDB_TRUSTED_CA | CERTDB_VALID_CA | CERTDB_USER,
0,
0
};
if (enterpriseRoots) {
for (CERTCertListNode* n = CERT_LIST_HEAD(enterpriseRoots.get());
!CERT_LIST_END(n, enterpriseRoots.get()); n = CERT_LIST_NEXT(n)) {
if (!n) {
break;
}
if (!n->cert) {
continue;
}
UniqueCERTCertificate cert(CERT_DupCertificate(n->cert));
if (ChangeCertTrustWithPossibleAuthentication(cert, trust, nullptr)
!= SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("couldn't trust enterprise certificate for TLS server auth"));
}
}
}
#ifdef XP_WIN
// Again copy mFamilySafetyRoot so we don't hold mMutex while calling
// ChangeCertTrustWithPossibleAuthentication.
UniqueCERTCertificate familySafetyRoot;
{
MutexAutoLock lock(mMutex);
if (mFamilySafetyRoot) {
familySafetyRoot.reset(CERT_DupCertificate(mFamilySafetyRoot.get()));
if (!familySafetyRoot) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
}
if (familySafetyRoot &&
ChangeCertTrustWithPossibleAuthentication(familySafetyRoot, trust,
nullptr) != SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("couldn't trust family safety certificate for TLS server auth"));
}
#endif
return NS_OK;
}
NS_IMETHODIMP
nsNSSComponent::GetEnterpriseRoots(nsIX509CertList** enterpriseRoots)
{
MutexAutoLock nsNSSComponentLock(mMutex);
MOZ_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return NS_ERROR_NOT_SAME_THREAD;
}
NS_ENSURE_ARG_POINTER(enterpriseRoots);
if (!mEnterpriseRoots) {
*enterpriseRoots = nullptr;
return NS_OK;
}
UniqueCERTCertList enterpriseRootsCopy(
nsNSSCertList::DupCertList(mEnterpriseRoots));
if (!enterpriseRootsCopy) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIX509CertList> enterpriseRootsCertList(
new nsNSSCertList(std::move(enterpriseRootsCopy)));
if (!enterpriseRootsCertList) {
return NS_ERROR_FAILURE;
}
enterpriseRootsCertList.forget(enterpriseRoots);
return NS_OK;
}
class LoadLoadableRootsTask final : public Runnable
{
public:
explicit LoadLoadableRootsTask(nsNSSComponent* nssComponent)
: Runnable("LoadLoadableRootsTask")
, mNSSComponent(nssComponent)
{
MOZ_ASSERT(nssComponent);
}
~LoadLoadableRootsTask() = default;
nsresult Dispatch();
private:
NS_IMETHOD Run() override;
nsresult LoadLoadableRoots();
RefPtr<nsNSSComponent> mNSSComponent;
nsCOMPtr<nsIThread> mThread;
};
nsresult
LoadLoadableRootsTask::Dispatch()
{
// Can't add 'this' as the event to run, since mThread may not be set yet
nsresult rv = NS_NewNamedThread("LoadRoots", getter_AddRefs(mThread),
nullptr,
nsIThreadManager::DEFAULT_STACK_SIZE);
if (NS_FAILED(rv)) {
return rv;
}
// Note: event must not null out mThread!
return mThread->Dispatch(this, NS_DISPATCH_NORMAL);
}
// NB: If anything in this function can cause an acquisition of
// nsNSSComponent::mMutex, this can potentially deadlock with
// nsNSSComponent::Shutdown.
NS_IMETHODIMP
LoadLoadableRootsTask::Run()
{
// First we Run() on the "LoadRoots" thread, do our work, and then we Run()
// again on the main thread so we can shut down the thread (since we don't
// need it any more). We can't shut down the thread while we're *on* the
// thread, which is why we do the dispatch to the main thread. CryptoTask.cpp
// (which informs this code) says that we can't null out mThread. This appears
// to be because its refcount could be decreased while this dispatch is being
// processed, so it might get prematurely destroyed. I'm not sure this makes
// sense but it'll get cleaned up in our destructor anyway, so it's fine to
// not null it out here (as long as we don't run twice on the main thread,
// which shouldn't be possible).
if (NS_IsMainThread()) {
if (mThread) {
mThread->Shutdown();
}
return NS_OK;
}
nsresult rv = LoadLoadableRoots();
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Error, ("LoadLoadableRoots failed"));
// We don't return rv here because then BlockUntilLoadableRootsLoaded 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.
}
if (NS_SUCCEEDED(rv)) {
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"));
}
}
{
MonitorAutoLock rootsLoadedLock(mNSSComponent->mLoadableRootsLoadedMonitor);
mNSSComponent->mLoadableRootsLoaded = true;
// Cache the result of LoadLoadableRoots so BlockUntilLoadableRootsLoaded
// can return it to all callers later.
mNSSComponent->mLoadableRootsLoadedResult = rv;
rv = mNSSComponent->mLoadableRootsLoadedMonitor.NotifyAll();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
// Go back to the main thread to clean up this worker thread.
return NS_DispatchToMainThread(this);
}
NS_IMETHODIMP
nsNSSComponent::HasActiveSmartCards(bool* result)
{
NS_ENSURE_ARG_POINTER(result);
MOZ_ASSERT(NS_IsMainThread(), "Main thread only");
if (!NS_IsMainThread()) {
return NS_ERROR_NOT_SAME_THREAD;
}
#ifndef MOZ_NO_SMART_CARDS
MutexAutoLock nsNSSComponentLock(mMutex);
AutoSECMODListReadLock secmodLock;
SECMODModuleList* list = SECMOD_GetDefaultModuleList();
while (list) {
if (SECMOD_HasRemovableSlots(list->module)) {
*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);
MOZ_ASSERT(NS_IsMainThread(), "Main thread only");
if (!NS_IsMainThread()) {
return NS_ERROR_NOT_SAME_THREAD;
}
MutexAutoLock nsNSSComponentLock(mMutex);
if (!mNSSInitialized) {
return NS_ERROR_NOT_INITIALIZED;
}
*result = false;
UniqueCERTCertList certList(
CERT_FindUserCertsByUsage(CERT_GetDefaultCertDB(), certUsageSSLClient,
false, true, nullptr));
if (!certList) {
return NS_OK;
}
// check if the list is empty
if (CERT_LIST_END(CERT_LIST_HEAD(certList), certList)) {
return NS_OK;
}
// The list is not empty, meaning at least one cert is installed
*result = true;
return NS_OK;
}
nsresult
nsNSSComponent::BlockUntilLoadableRootsLoaded()
{
MonitorAutoLock rootsLoadedLock(mLoadableRootsLoadedMonitor);
while (!mLoadableRootsLoaded) {
rootsLoadedLock.Wait();
}
MOZ_ASSERT(mLoadableRootsLoaded);
return mLoadableRootsLoadedResult;
}
nsresult
nsNSSComponent::CheckForSmartCardChanges()
{
#ifndef MOZ_NO_SMART_CARDS
MutexAutoLock nsNSSComponentLock(mMutex);
if (!mNSSInitialized) {
return NS_ERROR_NOT_INITIALIZED;
}
// 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 DLL_PREFIX nss3 DLL_SUFFIX.
static nsresult
GetNSS3Directory(nsCString& result)
{
UniquePRString nss3Path(
PR_GetLibraryFilePathname(DLL_PREFIX "nss3" 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;
}
#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> nss3DirectoryWin = do_QueryInterface(nss3Directory);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("couldn't get nsILocalFileWin"));
return rv;
}
return nss3DirectoryWin->GetNativeCanonicalPath(result);
#else
return nss3Directory->GetNativePath(result);
#endif
}
// 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)
{
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;
}
#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> directoryWin = do_QueryInterface(directory);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("couldn't get nsILocalFileWin"));
return rv;
}
return directoryWin->GetNativeCanonicalPath(result);
#else
return directory->GetNativePath(result);
#endif
}
nsresult
LoadLoadableRootsTask::LoadLoadableRoots()
{
// Find the best Roots module for our purposes.
// Prefer the application's installation directory,
// but also ensure the library is at least the version we expect.
Vector<nsCString> possibleCKBILocations;
// First try in the directory where we've already loaded
// DLL_PREFIX nss3 DLL_SUFFIX, since that's likely to be correct.
nsAutoCString nss3Dir;
nsresult rv = GetNSS3Directory(nss3Dir);
if (NS_SUCCEEDED(rv)) {
if (!possibleCKBILocations.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 (!possibleCKBILocations.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 (!possibleCKBILocations.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 (!possibleCKBILocations.append(std::move(emptyString))) {
return NS_ERROR_OUT_OF_MEMORY;
}
for (const auto& possibleCKBILocation : possibleCKBILocations) {
if (mozilla::psm::LoadLoadableRoots(possibleCKBILocation)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("loaded CKBI from %s",
possibleCKBILocation.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;
long 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, true },
{ "security.ssl3.dhe_rsa_aes_256_sha",
TLS_DHE_RSA_WITH_AES_256_CBC_SHA, true },
{ "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_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)
{ "security.ssl3.rsa_des_ede3_sha",
TLS_RSA_WITH_3DES_EDE_CBC_SHA, true }, // deprecated (RSA key exchange, 3DES)
// All the rest are disabled
{ nullptr, 0 } // end marker
};
// 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 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);
}
namespace {
class CipherSuiteChangeObserver : public nsIObserver
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
static nsresult StartObserve();
protected:
virtual ~CipherSuiteChangeObserver() {}
private:
static StaticRefPtr<CipherSuiteChangeObserver> sObserver;
CipherSuiteChangeObserver() {}
};
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;
}
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
const CipherPref* const cp = sCipherPrefs;
for (size_t i = 0; cp[i].pref; ++i) {
if (prefName.Equals(cp[i].pref)) {
bool cipherEnabled = Preferences::GetBool(cp[i].pref,
cp[i].enabledByDefault);
SSL_CipherPrefSetDefault(cp[i].id, cipherEnabled);
SSL_ClearSessionCache();
break;
}
}
} 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)
{
// 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);
}
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);
CertVerifier::PinningMode pinningMode =
static_cast<CertVerifier::PinningMode>
(Preferences::GetInt("security.cert_pinning.enforcement_level",
CertVerifier::pinningDisabled));
if (pinningMode > CertVerifier::pinningEnforceTestMode) {
pinningMode = CertVerifier::pinningDisabled;
}
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;
}
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;
}
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;
}
DistrustedCAPolicy defaultCAPolicyMode =
DistrustedCAPolicy::DistrustSymantecRoots;
DistrustedCAPolicy distrustedCAPolicy =
static_cast<DistrustedCAPolicy>
(Preferences::GetUint("security.pki.distrust_ca_policy",
static_cast<uint32_t>(defaultCAPolicyMode)));
// If distrustedCAPolicy sets any bits larger than the maximum mask, fall back
// to the default.
if (distrustedCAPolicy & ~DistrustedCAPolicyMaxAllowedValueMask) {
distrustedCAPolicy = defaultCAPolicyMode;
}
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,
pinningMode, sha1Mode,
nameMatchingMode,
netscapeStepUpPolicy,
ctMode, distrustedCAPolicy);
}
// 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 security-prefs.js
// 1 means TLS 1.0, 2 means TLS 1.1, etc.
static const uint32_t PSM_DEFAULT_MIN_TLS_VERSION = 1;
static const uint32_t PSM_DEFAULT_MAX_TLS_VERSION = 4;
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);
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()
{
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
// "<original name>.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.
static nsresult
AttemptToRenamePKCS11ModuleDB(const nsACString& profilePath,
const nsACString& moduleDBFilename)
{
nsAutoCString destModuleDBFilename(moduleDBFilename);
destModuleDBFilename.Append(".fips");
nsCOMPtr<nsIFile> dbFile = do_CreateInstance("@mozilla.org/file/local;1");
if (!dbFile) {
return NS_ERROR_FAILURE;
}
nsresult rv = dbFile->InitWithNativePath(profilePath);
if (NS_FAILED(rv)) {
return rv;
}
rv = dbFile->AppendNative(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?", PromiseFlatCString(moduleDBFilename).get()));
return NS_OK;
}
nsCOMPtr<nsIFile> destDBFile = do_CreateInstance("@mozilla.org/file/local;1");
if (!destDBFile) {
return NS_ERROR_FAILURE;
}
rv = destDBFile->InitWithNativePath(profilePath);
if (NS_FAILED(rv)) {
return rv;
}
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.
nsCOMPtr<nsIFile> profileDir = do_CreateInstance("@mozilla.org/file/local;1");
if (!profileDir) {
return NS_ERROR_FAILURE;
}
rv = profileDir->InitWithNativePath(profilePath);
if (NS_FAILED(rv)) {
return rv;
}
// 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;
}
// The platform now only uses the sqlite-backed databases, so we'll try to
// rename "pkcs11.txt". However, if we're upgrading from a version that used the
// old format, we need to try to rename the old "secmod.db" as well (if we were
// to only rename "pkcs11.txt", initializing NSS will still fail due to the old
// database being in FIPS mode).
static nsresult
AttemptToRenameBothPKCS11ModuleDBVersions(const nsACString& profilePath)
{
NS_NAMED_LITERAL_CSTRING(legacyModuleDBFilename, "secmod.db");
NS_NAMED_LITERAL_CSTRING(sqlModuleDBFilename, "pkcs11.txt");
nsresult rv = AttemptToRenamePKCS11ModuleDB(profilePath,
legacyModuleDBFilename);
if (NS_FAILED(rv)) {
return rv;
}
return AttemptToRenamePKCS11ModuleDB(profilePath, sqlModuleDBFilename);
}
#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.
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);
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
SECStatus srv = ::mozilla::psm::InitializeNSS(profilePath, false, !safeMode);
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, true, !safeMode);
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, false, false);
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) {
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 = AttemptToRenameBothPKCS11ModuleDBVersions(profilePath);
if (NS_FAILED(rv)) {
return rv;
}
srv = ::mozilla::psm::InitializeNSS(profilePath, false, true);
if (srv == SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("initialized in r/w mode"));
return NS_OK;
}
srv = ::mozilla::psm::InitializeNSS(profilePath, true, true);
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);
return srv == SECSuccess ? NS_OK : NS_ERROR_FAILURE;
}
nsresult
nsNSSComponent::InitializeNSS()
{
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("nsNSSComponent::InitializeNSS\n"));
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);
if (NS_FAILED(rv)) {
return NS_ERROR_NOT_AVAILABLE;
}
#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);
if (NS_FAILED(rv)) {
return rv;
}
}
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("inSafeMode: %u\n", inSafeMode));
rv = InitializeNSSWithFallbacks(profileStr, nocertdb, inSafeMode);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("failed to initialize NSS"));
return rv;
}
PK11_SetPasswordFunc(PK11PasswordPrompt);
SharedSSLState::GlobalInit();
// Register an observer so we can inform NSS when these prefs change
Preferences::AddStrongObserver(this, "security.");
SSL_OptionSetDefault(SSL_ENABLE_SSL2, false);
SSL_OptionSetDefault(SSL_V2_COMPATIBLE_HELLO, false);
rv = setEnabledTLSVersions();
if (NS_FAILED(rv)) {
return NS_ERROR_UNEXPECTED;
}
DisableMD5();
// Note that these functions do not change the trust of any loaded 3rd party
// roots. Because we're initializing the nsNSSComponent, and because if the
// user has a master password set on the softoken it could cause the
// authentication dialog to come up, we could conceivably re-enter
// nsNSSComponent initialization, which would be bad. Instead, we schedule an
// event to set the trust after the component has been initialized (below).
MaybeEnableFamilySafetyCompatibility();
MaybeImportEnterpriseRoots();
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);
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));
if (NS_FAILED(InitializeCipherSuite())) {
MOZ_LOG(gPIPNSSLog, LogLevel::Error, ("Unable to initialize cipher suite settings\n"));
return NS_ERROR_FAILURE;
}
mozilla::pkix::RegisterErrorTable();
if (PK11_IsFIPS()) {
Telemetry::Accumulate(Telemetry::FIPS_ENABLED, true);
}
// Gather telemetry on any PKCS#11 modules we have loaded. Note that because
// we load the built-in root module asynchronously after this, the telemetry
// will not include it.
{ // Introduce scope for the AutoSECMODListReadLock.
AutoSECMODListReadLock lock;
for (SECMODModuleList* list = SECMOD_GetDefaultModuleList(); list;
list = list->next) {
nsAutoString scalarKey;
GetModuleNameForTelemetry(list->module, scalarKey);
// Scalar keys must be between 0 and 70 characters (exclusive).
// GetModuleNameForTelemetry takes care of keys that are too long. If for
// some reason it couldn't come up with an appropriate name and returned
// an empty result, however, we need to not attempt to record this (it
// wouldn't give us anything useful anyway).
if (scalarKey.Length() > 0) {
Telemetry::ScalarSet(
Telemetry::ScalarID::SECURITY_PKCS11_MODULES_LOADED, scalarKey, true);
}
}
}
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::GetString("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);
nsCOMPtr<nsINSSComponent> handle(this);
NS_DispatchToCurrentThread(NS_NewRunnableFunction("nsNSSComponent::TrustLoaded3rdPartyRoots",
[handle]() {
MOZ_ALWAYS_SUCCEEDS(handle->TrustLoaded3rdPartyRoots());
}));
// TLSServerSocket may be run with the session cache enabled. It is
// necessary to call this once before that can happen. This specifies a
// maximum of 1000 cache entries (the default number of cache entries is
// 10000, which seems a little excessive as there probably won't be that
// many clients connecting to any TLSServerSockets the browser runs.) Note
// that this must occur before any calls to SSL_ClearSessionCache (otherwise
// memory will leak).
if (SSL_ConfigServerSessionIDCache(1000, 0, 0, nullptr) != SECSuccess) {
return NS_ERROR_FAILURE;
}
// Set dynamic options from prefs. This has to run after
// SSL_ConfigServerSessionIDCache.
setValidationOptions(true, lock);
RefPtr<LoadLoadableRootsTask> loadLoadableRootsTask(
new LoadLoadableRootsTask(this));
rv = loadLoadableRootsTask->Dispatch();
if (NS_FAILED(rv)) {
return rv;
}
mNSSInitialized = true;
return NS_OK;
}
}
void
nsNSSComponent::ShutdownNSS()
{
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("nsNSSComponent::ShutdownNSS\n"));
MOZ_RELEASE_ASSERT(NS_IsMainThread());
MutexAutoLock lock(mMutex);
// We have to block until the load loadable roots task has completed, because
// otherwise we might try to unload the loadable roots while the loadable
// roots 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 roots background task.
// In that case, we don't want to block on an event that will never happen.
if (mNSSInitialized) {
Unused << BlockUntilLoadableRootsLoaded();
// We can only run SSL_ShutdownServerSessionIDCache once (the rest of
// these operations are idempotent).
SSL_ClearSessionCache();
// TLSServerSocket may be run with the session cache enabled. This ensures
// those resources are cleaned up.
Unused << SSL_ShutdownServerSessionIDCache();
}
::mozilla::psm::UnloadLoadableRoots();
#ifdef XP_WIN
mFamilySafetyRoot = nullptr;
mEnterpriseRoots = nullptr;
#endif
PK11_SetPasswordFunc((PK11PasswordFunc)nullptr);
Preferences::RemoveObserver(this, "security.");
// Release the default CertVerifier. This will cause any held NSS resources
// to be released.
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).
mNSSInitialized = false;
}
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;
}
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;
}
RememberCertErrorsTable::Init();
return RegisterObservers();
}
// 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 (prefName.EqualsLiteral("security.tls.version.min") ||
prefName.EqualsLiteral("security.tls.version.max")) {
(void) setEnabledTLSVersions();
} 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.ssl.disable_session_identifiers")) {
ConfigureTLSSessionIdentifiers();
} 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.cert_pinning.enforcement_level") ||
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.distrust_ca_policy")) {
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.Equals(kFamilySafetyModePref)) {
// When the pref changes, it is safe to change the trust of 3rd party
// roots in the same event tick that they're loaded.
UnloadFamilySafetyRoot();
MaybeEnableFamilySafetyCompatibility();
TrustLoaded3rdPartyRoots();
} else if (prefName.EqualsLiteral("security.content.signature.root_hash")) {
MutexAutoLock lock(mMutex);
mContentSigningRootHash.Truncate();
Preferences::GetString("security.content.signature.root_hash",
mContentSigningRootHash);
} else if (prefName.Equals(kEnterpriseRootModePref)) {
// When the pref changes, it is safe to change the trust of 3rd party
// roots in the same event tick that they're loaded.
UnloadEnterpriseRoots();
MaybeImportEnterpriseRoots();
TrustLoaded3rdPartyRoots();
} 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)
SSL_ClearSessionCache();
}
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(
NS_LITERAL_CSTRING("all:temporary-certificates"),
0);
}
nsClientAuthRememberService::ClearAllRememberedDecisions();
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);
MOZ_ASSERT(mNSSInitialized);
if (mTestBuiltInRootHash.IsEmpty()) {
return NS_OK;
}
*result = mTestBuiltInRootHash.Equals(certHash);
#endif // DEBUG
return NS_OK;
}
NS_IMETHODIMP
nsNSSComponent::IsCertContentSigningRoot(CERTCertificate* cert, bool* result)
{
NS_ENSURE_ARG_POINTER(result);
*result = false;
RefPtr<nsNSSCertificate> nsc = nsNSSCertificate::Create(cert);
if (!nsc) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("creating nsNSSCertificate failed"));
return NS_ERROR_FAILURE;
}
nsAutoString certHash;
nsresult rv = nsc->GetSha256Fingerprint(certHash);
if (NS_FAILED(rv)) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("getting cert fingerprint failed"));
return rv;
}
MutexAutoLock lock(mMutex);
MOZ_ASSERT(mNSSInitialized);
if (mContentSigningRootHash.IsEmpty()) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("mContentSigningRootHash is empty"));
return NS_ERROR_FAILURE;
}
*result = mContentSigningRootHash.Equals(certHash);
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() { }
NS_IMETHODIMP
nsNSSComponent::GetDefaultCertVerifier(SharedCertVerifier** result)
{
MutexAutoLock lock(mMutex);
MOZ_ASSERT(mNSSInitialized);
NS_ENSURE_ARG_POINTER(result);
RefPtr<SharedCertVerifier> certVerifier(mDefaultCertVerifier);
certVerifier.forget(result);
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;
}
RefPtr<SharedCertVerifier> result;
nsresult rv = nssComponent->GetDefaultCertVerifier(getter_AddRefs(result));
if (NS_FAILED(rv)) {
return nullptr;
}
return result.forget();
}
} } // namespace mozilla::psm
NS_IMPL_ISUPPORTS(PipUIContext, nsIInterfaceRequestor)
PipUIContext::PipUIContext()
{
}
PipUIContext::~PipUIContext()
{
}
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;
}
// NSS will call this during PKCS12 export to potentially switch the endianness
// of the characters of `inBuf` to big (network) endian. Since we already did
// that in nsPKCS12Blob::stringToBigEndianBytes, we just perform a memcpy here.
extern "C" {
PRBool
pkcs12StringEndiannessConversion(PRBool, unsigned char* inBuf,
unsigned int inBufLen, unsigned char* outBuf,
unsigned int, unsigned int* outBufLen, PRBool)
{
*outBufLen = inBufLen;
memcpy(outBuf, inBuf, inBufLen);
return true;
}
}
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
const CipherPref* const cp = sCipherPrefs;
for (size_t i = 0; cp[i].pref; ++i) {
bool cipherEnabled = Preferences::GetBool(cp[i].pref,
cp[i].enabledByDefault);
SSL_CipherPrefSetDefault(cp[i].id, cipherEnabled);
}
// 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_PKCS12SetPreferredCipher(PKCS12_DES_EDE3_168, 1);
PORT_SetUCS2_ASCIIConversionFunction(pkcs12StringEndiannessConversion);
// 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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