Add m-esr52 at 52.6.0

1 files changed, 2499 insertions, 0 deletions

diff --git a/security/manager/ssl/nsNSSComponent.cpp b/security/manager/ssl/nsNSSComponent.cpp
new file mode 100644
index 000000000..d53f846ed
--- /dev/null
+++ b/security/manager/ssl/nsNSSComponent.cpp
@@ -0,0 +1,2499 @@
+/* -*- 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 "ExtendedValidation.h"
+#include "NSSCertDBTrustDomain.h"
+#include "ScopedNSSTypes.h"
+#include "SharedSSLState.h"
+#include "cert.h"
+#include "certdb.h"
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Casting.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/PublicSSL.h"
+#include "mozilla/Services.h"
+#include "mozilla/StaticPtr.h"
+#include "mozilla/SyncRunnable.h"
+#include "mozilla/Telemetry.h"
+#include "mozilla/Unused.h"
+#include "nsAppDirectoryServiceDefs.h"
+#include "nsCRT.h"
+#include "nsClientAuthRemember.h"
+#include "nsComponentManagerUtils.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsICertOverrideService.h"
+#include "nsIFile.h"
+#include "nsIObserverService.h"
+#include "nsIPrompt.h"
+#include "nsIProperties.h"
+#include "nsISiteSecurityService.h"
+#include "nsITokenPasswordDialogs.h"
+#include "nsIWindowWatcher.h"
+#include "nsIXULRuntime.h"
+#include "nsNSSCertificateDB.h"
+#include "nsNSSHelper.h"
+#include "nsNSSShutDown.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"
+
+#ifndef MOZ_NO_SMART_CARDS
+#include "nsSmartCardMonitor.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()
+{
+  nsresult rv;
+  if (XRE_IsParentProcess()) {
+    nsCOMPtr<nsISupports> nss = do_GetService(PSM_COMPONENT_CONTRACTID, &rv);
+    if (NS_FAILED(rv)) {
+      return false;
+    }
+
+    return true;
+  }
+
+  // If this is a content process and not the main thread (i.e. probably a
+  // worker) then forward this call to the main thread.
+  if (!NS_IsMainThread()) {
+    static Atomic<bool> initialized(false);
+
+    // Cache the result to dispatch to the main thread only once per worker.
+    if (initialized) {
+      return true;
+    }
+
+    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([]() {
+        initialized = EnsureNSSInitializedChromeOrContent();
+      }))
+    );
+
+    return initialized;
+  }
+
+  if (NSS_IsInitialized()) {
+    return true;
+  }
+
+  if (NSS_NoDB_Init(nullptr) != SECSuccess) {
+    return false;
+  }
+
+  if (NS_FAILED(mozilla::psm::InitializeCipherSuite())) {
+    return false;
+  }
+
+  mozilla::psm::DisableMD5();
+  return true;
+}
+
+// We must ensure that the nsNSSComponent has been loaded before
+// creating any other components.
+bool EnsureNSSInitialized(EnsureNSSOperator op)
+{
+  if (GeckoProcessType_Default != XRE_GetProcessType())
+  {
+    if (op == nssEnsureOnChromeOnly)
+    {
+      // If the component needs PSM/NSS initialized only on the chrome process,
+      // pretend we successfully initiated it but in reality we bypass it.
+      // It's up to the programmer to check for process type in such components
+      // and take care not to call anything that needs NSS/PSM initiated.
+      return true;
+    }
+
+    NS_ERROR("Trying to initialize PSM/NSS in a non-chrome process!");
+    return false;
+  }
+
+  static bool loading = false;
+  static int32_t haveLoaded = 0;
+
+  switch (op)
+  {
+    // In following 4 cases we are protected by monitor of XPCOM component
+    // manager - we are inside of do_GetService call for nss component, so it is
+    // safe to move with the flags here.
+  case nssLoadingComponent:
+    if (loading)
+      return false; // We are reentered during nss component creation
+    loading = true;
+    return true;
+
+  case nssInitSucceeded:
+    NS_ASSERTION(loading, "Bad call to EnsureNSSInitialized(nssInitSucceeded)");
+    loading = false;
+    PR_AtomicSet(&haveLoaded, 1);
+    return true;
+
+  case nssInitFailed:
+    NS_ASSERTION(loading, "Bad call to EnsureNSSInitialized(nssInitFailed)");
+    loading = false;
+    MOZ_FALLTHROUGH;
+
+  case nssShutdown:
+    PR_AtomicSet(&haveLoaded, 0);
+    return false;
+
+    // In this case we are called from a component to ensure nss initilization.
+    // If the component has not yet been loaded and is not currently loading
+    // call do_GetService for nss component to ensure it.
+  case nssEnsure:
+  case nssEnsureOnChromeOnly:
+  case nssEnsureChromeOrContent:
+    // We are reentered during nss component creation or nss component is already up
+    if (PR_AtomicAdd(&haveLoaded, 0) || loading)
+      return true;
+
+    {
+    nsCOMPtr<nsINSSComponent> nssComponent
+      = do_GetService(PSM_COMPONENT_CONTRACTID);
+
+    // Nss component failed to initialize, inform the caller of that fact.
+    // Flags are appropriately set by component constructor itself.
+    if (!nssComponent)
+      return false;
+
+    bool isInitialized;
+    nsresult rv = nssComponent->IsNSSInitialized(&isInitialized);
+    return NS_SUCCEEDED(rv) && isInitialized;
+    }
+
+  default:
+    NS_ASSERTION(false, "Bad operator to EnsureNSSInitialized");
+    return false;
+  }
+}
+
+static void
+GetRevocationBehaviorFromPrefs(/*out*/ CertVerifier::OcspDownloadConfig* odc,
+                               /*out*/ CertVerifier::OcspStrictConfig* osc,
+                               /*out*/ CertVerifier::OcspGetConfig* ogc,
+                               /*out*/ uint32_t* certShortLifetimeInDays,
+                               const MutexAutoLock& /*proofOfLock*/)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(odc);
+  MOZ_ASSERT(osc);
+  MOZ_ASSERT(ogc);
+  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;
+
+  // XXX: Always use POST for OCSP; see bug 871954 for undoing this.
+  *ogc = Preferences::GetBool("security.OCSP.GET.enabled", false)
+       ? CertVerifier::ocspGetEnabled
+       : CertVerifier::ocspGetDisabled;
+
+  // 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));
+
+  SSL_ClearSessionCache();
+}
+
+nsNSSComponent::nsNSSComponent()
+  : mutex("nsNSSComponent.mutex")
+  , mNSSInitialized(false)
+#ifndef MOZ_NO_SMART_CARDS
+  , mThreadList(nullptr)
+#endif
+{
+  MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("nsNSSComponent::ctor\n"));
+  MOZ_RELEASE_ASSERT(NS_IsMainThread());
+
+  NS_ASSERTION( (0 == mInstanceCount), "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;
+  nsNSSShutDownList::shutdown();
+
+  // We are being freed, drop the haveLoaded flag to re-enable
+  // potential nss initialization later.
+  EnsureNSSInitialized(nssShutdown);
+
+  MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("nsNSSComponent::dtor finished\n"));
+}
+
+NS_IMETHODIMP
+nsNSSComponent::PIPBundleFormatStringFromName(const char* name,
+                                              const char16_t** params,
+                                              uint32_t numParams,
+                                              nsAString& outString)
+{
+  nsresult rv = NS_ERROR_FAILURE;
+
+  if (mPIPNSSBundle && name) {
+    nsXPIDLString result;
+    rv = mPIPNSSBundle->FormatStringFromName(NS_ConvertASCIItoUTF16(name).get(),
+                                             params, numParams,
+                                             getter_Copies(result));
+    if (NS_SUCCEEDED(rv)) {
+      outString = result;
+    }
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+nsNSSComponent::GetPIPNSSBundleString(const char* name, nsAString& outString)
+{
+  nsresult rv = NS_ERROR_FAILURE;
+
+  outString.SetLength(0);
+  if (mPIPNSSBundle && name) {
+    nsXPIDLString result;
+    rv = mPIPNSSBundle->GetStringFromName(NS_ConvertASCIItoUTF16(name).get(),
+                                          getter_Copies(result));
+    if (NS_SUCCEEDED(rv)) {
+      outString = result;
+      rv = NS_OK;
+    }
+  }
+
+  return rv;
+}
+
+NS_IMETHODIMP
+nsNSSComponent::GetNSSBundleString(const char* name, nsAString& outString)
+{
+  nsresult rv = NS_ERROR_FAILURE;
+
+  outString.SetLength(0);
+  if (mNSSErrorsBundle && name) {
+    nsXPIDLString result;
+    rv = mNSSErrorsBundle->GetStringFromName(NS_ConvertASCIItoUTF16(name).get(),
+                                             getter_Copies(result));
+    if (NS_SUCCEEDED(rv)) {
+      outString = result;
+      rv = NS_OK;
+    }
+  }
+
+  return rv;
+}
+
+#ifndef MOZ_NO_SMART_CARDS
+void
+nsNSSComponent::LaunchSmartCardThreads()
+{
+  nsNSSShutDownPreventionLock locker;
+  {
+    SECMODModuleList* list;
+    SECMODListLock* lock = SECMOD_GetDefaultModuleListLock();
+    if (!lock) {
+        MOZ_LOG(gPIPNSSLog, LogLevel::Error,
+               ("Couldn't get the module list lock, can't launch smart card threads\n"));
+        return;
+    }
+    SECMOD_GetReadLock(lock);
+    list = SECMOD_GetDefaultModuleList();
+
+    while (list) {
+      SECMODModule* module = list->module;
+      LaunchSmartCardThread(module);
+      list = list->next;
+    }
+    SECMOD_ReleaseReadLock(lock);
+  }
+}
+
+NS_IMETHODIMP
+nsNSSComponent::LaunchSmartCardThread(SECMODModule* module)
+{
+  SmartCardMonitoringThread* newThread;
+  if (SECMOD_HasRemovableSlots(module)) {
+    if (!mThreadList) {
+      mThreadList = new SmartCardThreadList();
+    }
+    newThread = new SmartCardMonitoringThread(module);
+    // newThread is adopted by the add.
+    return mThreadList->Add(newThread);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSComponent::ShutdownSmartCardThread(SECMODModule* module)
+{
+  if (!mThreadList) {
+    return NS_OK;
+  }
+  mThreadList->Remove(module);
+  return NS_OK;
+}
+
+void
+nsNSSComponent::ShutdownSmartCardThreads()
+{
+  delete mThreadList;
+  mThreadList = nullptr;
+}
+#endif // MOZ_NO_SMART_CARDS
+
+#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;
+}
+
+// It would be convenient to just use nsIX509CertDB in the following code.
+// However, since nsIX509CertDB depends on nsNSSComponent initialization (and
+// since this code runs during that initialization), we can't use it. Instead,
+// we can use NSS APIs directly (as long as we're called late enough in
+// nsNSSComponent initialization such that those APIs are safe to use).
+
+// Helper function to convert a PCCERT_CONTEXT (i.e. a certificate obtained via
+// a Windows API) to a temporary CERTCertificate (i.e. a certificate for use
+// with NSS APIs).
+static UniqueCERTCertificate
+PCCERT_CONTEXTToCERTCertificate(PCCERT_CONTEXT pccert)
+{
+  MOZ_ASSERT(pccert);
+  if (!pccert) {
+    return nullptr;
+  }
+
+  SECItem derCert = {
+    siBuffer,
+    pccert->pbCertEncoded,
+    pccert->cbCertEncoded
+  };
+  return UniqueCERTCertificate(
+    CERT_NewTempCertificate(CERT_GetDefaultCertDB(), &derCert,
+                            nullptr, // nickname unnecessary
+                            false, // not permanent
+                            true)); // copy DER
+}
+
+static const char* kMicrosoftFamilySafetyCN = "Microsoft Family Safety";
+
+nsresult
+nsNSSComponent::MaybeImportFamilySafetyRoot(PCCERT_CONTEXT certificate,
+                                            bool& wasFamilySafetyRoot)
+{
+  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 (nsCRT::strcmp(subjectName.get(), kMicrosoftFamilySafetyCN) == 0) {
+    wasFamilySafetyRoot = true;
+    CERTCertTrust trust = {
+      CERTDB_TRUSTED_CA | CERTDB_VALID_CA | CERTDB_USER,
+      0,
+      0
+    };
+    if (CERT_ChangeCertTrust(nullptr, nssCertificate.get(), &trust)
+          != SECSuccess) {
+      MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
+              ("couldn't trust certificate for TLS server auth"));
+      return NS_ERROR_FAILURE;
+    }
+    MOZ_ASSERT(!mFamilySafetyRoot);
+    mFamilySafetyRoot = Move(nssCertificate);
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("added Family Safety root"));
+  }
+  return NS_OK;
+}
+
+// Because HCERTSTORE is just a typedef void*, we can't use any of the nice
+// scoped or unique pointer templates. To elaborate, any attempt would
+// instantiate those templates with T = void. When T gets used in the context
+// of T&, this results in void&, which isn't legal.
+class ScopedCertStore final
+{
+public:
+  explicit ScopedCertStore(HCERTSTORE certstore) : certstore(certstore) {}
+
+  ~ScopedCertStore()
+  {
+    CertCloseStore(certstore, 0);
+  }
+
+  HCERTSTORE get()
+  {
+    return certstore;
+  }
+
+private:
+  ScopedCertStore(const ScopedCertStore&) = delete;
+  ScopedCertStore& operator=(const ScopedCertStore&) = delete;
+  HCERTSTORE certstore;
+};
+
+static const wchar_t* kWindowsDefaultRootStoreName = L"ROOT";
+
+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;
+}
+
+void
+nsNSSComponent::UnloadFamilySafetyRoot()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  if (!NS_IsMainThread()) {
+    return;
+  }
+  MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("UnloadFamilySafetyRoot"));
+  if (!mFamilySafetyRoot) {
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("Family Safety Root wasn't present"));
+    return;
+  }
+  // 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 (CERT_ChangeCertTrust(nullptr, mFamilySafetyRoot.get(), &trust)
+        != SECSuccess) {
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
+            ("couldn't untrust certificate for TLS server auth"));
+  }
+  mFamilySafetyRoot = nullptr;
+}
+
+#endif // XP_WIN
+
+// 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
+  UnloadFamilySafetyRoot();
+  if (!(IsWin8Point1OrLater() && !IsWin10OrLater())) {
+    return;
+  }
+  // Detect but don't import by default.
+  uint32_t familySafetyMode = Preferences::GetUint(kFamilySafetyModePref, 1);
+  if (familySafetyMode > 2) {
+    familySafetyMode = 0;
+  }
+  Telemetry::Accumulate(Telemetry::FAMILY_SAFETY, familySafetyMode);
+  if (familySafetyMode == 0) {
+    return;
+  }
+  bool familySafetyEnabled;
+  nsresult rv = AccountHasFamilySafetyEnabled(familySafetyEnabled);
+  if (NS_FAILED(rv)) {
+    Telemetry::Accumulate(Telemetry::FAMILY_SAFETY, 3);
+    return;
+  }
+  if (!familySafetyEnabled) {
+    Telemetry::Accumulate(Telemetry::FAMILY_SAFETY, 4);
+    return;
+  }
+  Telemetry::Accumulate(Telemetry::FAMILY_SAFETY, 5);
+  if (familySafetyMode == 2) {
+    rv = LoadFamilySafetyRoot();
+    if (NS_FAILED(rv)) {
+      Telemetry::Accumulate(Telemetry::FAMILY_SAFETY, 6);
+      MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
+              ("failed to load Family Safety root"));
+    } else {
+      Telemetry::Accumulate(Telemetry::FAMILY_SAFETY, 7);
+    }
+  }
+#endif // XP_WIN
+}
+
+#ifdef XP_WIN
+// Helper function to determine if the OS considers the given certificate to be
+// a trust anchor for TLS server auth certificates. This is to be used in the
+// context of importing what are presumed to be root certificates from the OS.
+// If this function returns true but it turns out that the given certificate is
+// in some way unsuitable to issue certificates, mozilla::pkix will never build
+// a valid chain that includes the certificate, so importing it even if it
+// isn't a valid CA poses no risk.
+static bool
+CertIsTrustAnchorForTLSServerAuth(PCCERT_CONTEXT certificate)
+{
+  MOZ_ASSERT(certificate);
+  if (!certificate) {
+    return false;
+  }
+
+  PCCERT_CHAIN_CONTEXT pChainContext = nullptr;
+  CERT_ENHKEY_USAGE enhkeyUsage;
+  memset(&enhkeyUsage, 0, sizeof(CERT_ENHKEY_USAGE));
+  LPSTR identifiers[] = {
+    "1.3.6.1.5.5.7.3.1", // id-kp-serverAuth
+  };
+  enhkeyUsage.cUsageIdentifier = ArrayLength(identifiers);
+  enhkeyUsage.rgpszUsageIdentifier = identifiers;
+  CERT_USAGE_MATCH certUsage;
+  memset(&certUsage, 0, sizeof(CERT_USAGE_MATCH));
+  certUsage.dwType = USAGE_MATCH_TYPE_AND;
+  certUsage.Usage = enhkeyUsage;
+  CERT_CHAIN_PARA chainPara;
+  memset(&chainPara, 0, sizeof(CERT_CHAIN_PARA));
+  chainPara.cbSize = sizeof(CERT_CHAIN_PARA);
+  chainPara.RequestedUsage = certUsage;
+
+  if (!CertGetCertificateChain(nullptr, certificate, nullptr, nullptr,
+                               &chainPara, 0, nullptr, &pChainContext)) {
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("CertGetCertificateChain failed"));
+    return false;
+  }
+  bool trusted = pChainContext->TrustStatus.dwErrorStatus ==
+                 CERT_TRUST_NO_ERROR;
+  bool isRoot = pChainContext->cChain == 1;
+  CertFreeCertificateChain(pChainContext);
+  if (trusted && isRoot) {
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
+            ("certificate is trust anchor for TLS server auth"));
+    return true;
+  }
+  MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
+          ("certificate not trust anchor for TLS server auth"));
+  return false;
+}
+
+void
+nsNSSComponent::UnloadEnterpriseRoots()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  if (!NS_IsMainThread()) {
+    return;
+  }
+  MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("UnloadEnterpriseRoots"));
+  if (!mEnterpriseRoots) {
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("no enterprise roots were present"));
+    return;
+  }
+  // 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(mEnterpriseRoots.get());
+       !CERT_LIST_END(n, mEnterpriseRoots.get()); n = CERT_LIST_NEXT(n)) {
+    if (!n || !n->cert) {
+      MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
+              ("library failure: CERTCertListNode null or lacks cert"));
+      continue;
+    }
+    if (CERT_ChangeCertTrust(nullptr, n->cert, &trust) != SECSuccess) {
+      MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
+              ("couldn't untrust certificate for TLS server auth"));
+    }
+  }
+  mEnterpriseRoots = nullptr;
+  MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("unloaded enterprise roots"));
+}
+
+NS_IMETHODIMP
+nsNSSComponent::GetEnterpriseRoots(nsIX509CertList** enterpriseRoots)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  if (!NS_IsMainThread()) {
+    return NS_ERROR_NOT_SAME_THREAD;
+  }
+  NS_ENSURE_ARG_POINTER(enterpriseRoots);
+
+  nsNSSShutDownPreventionLock lock;
+  // nsNSSComponent isn't a nsNSSShutDownObject, so we can't check
+  // isAlreadyShutDown(). However, since mEnterpriseRoots is cleared when NSS
+  // shuts down, we can use that as a proxy for checking for NSS shutdown.
+  // (Of course, it may also be the case that no enterprise roots were imported,
+  // so we should just return a null list and NS_OK in this case.)
+  if (!mEnterpriseRoots) {
+    *enterpriseRoots = nullptr;
+    return NS_OK;
+  }
+  UniqueCERTCertList enterpriseRootsCopy(
+    nsNSSCertList::DupCertList(mEnterpriseRoots, lock));
+  if (!enterpriseRootsCopy) {
+    return NS_ERROR_FAILURE;
+  }
+  nsCOMPtr<nsIX509CertList> enterpriseRootsCertList(
+    new nsNSSCertList(Move(enterpriseRootsCopy), lock));
+  if (!enterpriseRootsCertList) {
+    return NS_ERROR_FAILURE;
+  }
+  enterpriseRootsCertList.forget(enterpriseRoots);
+  return NS_OK;
+}
+#endif // XP_WIN
+
+static const char* kEnterpriseRootModePref = "security.enterprise_roots.enabled";
+
+void
+nsNSSComponent::MaybeImportEnterpriseRoots()
+{
+#ifdef XP_WIN
+  MOZ_ASSERT(NS_IsMainThread());
+  if (!NS_IsMainThread()) {
+    return;
+  }
+  UnloadEnterpriseRoots();
+  bool importEnterpriseRoots = Preferences::GetBool(kEnterpriseRootModePref,
+                                                    false);
+  if (!importEnterpriseRoots) {
+    return;
+  }
+
+  MOZ_ASSERT(!mEnterpriseRoots);
+  mEnterpriseRoots.reset(CERT_NewCertList());
+  if (!mEnterpriseRoots) {
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
+            ("failed to allocate a new CERTCertList for mEnterpriseRoots"));
+    return;
+  }
+
+  ImportEnterpriseRootsForLocation(CERT_SYSTEM_STORE_LOCAL_MACHINE);
+  ImportEnterpriseRootsForLocation(CERT_SYSTEM_STORE_LOCAL_MACHINE_GROUP_POLICY);
+  ImportEnterpriseRootsForLocation(CERT_SYSTEM_STORE_LOCAL_MACHINE_ENTERPRISE);
+#endif // XP_WIN
+}
+
+#ifdef XP_WIN
+// Loads the enterprise roots at the registry location corresponding to the
+// given location flag.
+// Supported flags are:
+//   CERT_SYSTEM_STORE_LOCAL_MACHINE
+//     (for HKLM\SOFTWARE\Microsoft\SystemCertificates)
+//   CERT_SYSTEM_STORE_LOCAL_MACHINE_GROUP_POLICY
+//     (for HKLM\SOFTWARE\Policies\Microsoft\SystemCertificates\Root\Certificates)
+//   CERT_SYSTEM_STORE_LOCAL_MACHINE_ENTERPRISE
+//     (for HKLM\SOFTWARE\Microsoft\EnterpriseCertificates\Root\Certificates)
+void
+nsNSSComponent::ImportEnterpriseRootsForLocation(DWORD locationFlag)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  if (!NS_IsMainThread()) {
+    return;
+  }
+  MOZ_ASSERT(locationFlag == CERT_SYSTEM_STORE_LOCAL_MACHINE ||
+             locationFlag == CERT_SYSTEM_STORE_LOCAL_MACHINE_GROUP_POLICY ||
+             locationFlag == CERT_SYSTEM_STORE_LOCAL_MACHINE_ENTERPRISE,
+             "unexpected locationFlag for ImportEnterpriseRootsForLocation");
+  if (!(locationFlag == CERT_SYSTEM_STORE_LOCAL_MACHINE ||
+        locationFlag == CERT_SYSTEM_STORE_LOCAL_MACHINE_GROUP_POLICY ||
+        locationFlag == CERT_SYSTEM_STORE_LOCAL_MACHINE_ENTERPRISE)) {
+    return;
+  }
+
+  DWORD flags = locationFlag |
+                CERT_STORE_OPEN_EXISTING_FLAG |
+                CERT_STORE_READONLY_FLAG;
+  // The certificate store being opened should consist only of certificates
+  // added by a user or administrator and not any certificates that are part
+  // of Microsoft's root store program.
+  // The 3rd parameter to CertOpenStore should be NULL according to
+  // https://msdn.microsoft.com/en-us/library/windows/desktop/aa376559%28v=vs.85%29.aspx
+  ScopedCertStore enterpriseRootStore(CertOpenStore(
+    CERT_STORE_PROV_SYSTEM_REGISTRY_W, 0, NULL, flags,
+    kWindowsDefaultRootStoreName));
+  if (!enterpriseRootStore.get()) {
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("failed to open enterprise root store"));
+    return;
+  }
+  CERTCertTrust trust = {
+    CERTDB_TRUSTED_CA | CERTDB_VALID_CA | CERTDB_USER,
+    0,
+    0
+  };
+  PCCERT_CONTEXT certificate = nullptr;
+  uint32_t numImported = 0;
+  while ((certificate = CertFindCertificateInStore(enterpriseRootStore.get(),
+                                                   X509_ASN_ENCODING, 0,
+                                                   CERT_FIND_ANY, nullptr,
+                                                   certificate))) {
+    if (!CertIsTrustAnchorForTLSServerAuth(certificate)) {
+      MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
+              ("skipping cert not trust anchor for TLS server auth"));
+      continue;
+    }
+    UniqueCERTCertificate nssCertificate(
+      PCCERT_CONTEXTToCERTCertificate(certificate));
+    if (!nssCertificate) {
+      MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("couldn't decode certificate"));
+      continue;
+    }
+    // Don't import the Microsoft Family Safety root (this prevents the
+    // Enterprise Roots feature from interacting poorly with the Family
+    // Safety support).
+    UniquePORTString subjectName(
+      CERT_GetCommonName(&nssCertificate->subject));
+    if (nsCRT::strcmp(subjectName.get(), kMicrosoftFamilySafetyCN) == 0) {
+      MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("skipping Family Safety Root"));
+      continue;
+    }
+    MOZ_ASSERT(mEnterpriseRoots, "mEnterpriseRoots unexpectedly NULL?");
+    if (!mEnterpriseRoots) {
+      return;
+    }
+    if (CERT_AddCertToListTail(mEnterpriseRoots.get(), nssCertificate.get())
+          != SECSuccess) {
+      MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("couldn't add cert to list"));
+      continue;
+    }
+    if (CERT_ChangeCertTrust(nullptr, nssCertificate.get(), &trust)
+          != SECSuccess) {
+      MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
+              ("couldn't trust certificate for TLS server auth"));
+    }
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("Imported '%s'", subjectName.get()));
+    numImported++;
+    // now owned by mEnterpriseRoots
+    Unused << nssCertificate.release();
+  }
+  MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("imported %u roots", numImported));
+}
+#endif // XP_WIN
+
+void
+nsNSSComponent::LoadLoadableRoots()
+{
+  nsNSSShutDownPreventionLock locker;
+  SECMODModule* RootsModule = nullptr;
+
+  // In the past we used SECMOD_AddNewModule to load our module containing
+  // root CA certificates. This caused problems, refer to bug 176501.
+  // On startup, we fix our database and clean any stored module reference,
+  // and will use SECMOD_LoadUserModule to temporarily load it
+  // for the session. (This approach requires to clean up
+  // using SECMOD_UnloadUserModule at the end of the session.)
+
+  {
+    // Find module containing root certs
+
+    SECMODModuleList* list;
+    SECMODListLock* lock = SECMOD_GetDefaultModuleListLock();
+    if (!lock) {
+        MOZ_LOG(gPIPNSSLog, LogLevel::Error,
+               ("Couldn't get the module list lock, can't install loadable roots\n"));
+        return;
+    }
+    SECMOD_GetReadLock(lock);
+    list = SECMOD_GetDefaultModuleList();
+
+    while (!RootsModule && list) {
+      SECMODModule* module = list->module;
+
+      for (int i=0; i < module->slotCount; i++) {
+        PK11SlotInfo* slot = module->slots[i];
+        if (PK11_IsPresent(slot)) {
+          if (PK11_HasRootCerts(slot)) {
+            RootsModule = SECMOD_ReferenceModule(module);
+            break;
+          }
+        }
+      }
+
+      list = list->next;
+    }
+    SECMOD_ReleaseReadLock(lock);
+  }
+
+  if (RootsModule) {
+    int32_t modType;
+    SECMOD_DeleteModule(RootsModule->commonName, &modType);
+    SECMOD_DestroyModule(RootsModule);
+    RootsModule = nullptr;
+  }
+
+  // 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.
+
+  nsAutoString modName;
+  nsresult rv = GetPIPNSSBundleString("RootCertModuleName", modName);
+  if (NS_FAILED(rv)) {
+    // When running Cpp unit tests on Android, this will fail because string
+    // bundles aren't available (see bug 1311077, bug 1228175 comment 12, and
+    // bug 929655). Because the module name is really only for display purposes,
+    // we can just hard-code the value here. Furthermore, if we want to be able
+    // to stop using string bundles in PSM in this way, we'll have to hard-code
+    // the string and only use the localized version when displaying it to the
+    // user, so this is a step in that direction anyway.
+    modName.AssignLiteral("Builtin Roots Module");
+  }
+
+  nsCOMPtr<nsIProperties> directoryService(do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID));
+  if (!directoryService)
+    return;
+
+  static const char nss_lib[] = "nss3";
+  const char* possible_ckbi_locations[] = {
+    nss_lib, // This special value means: search for ckbi in the directory
+             // where nss3 is.
+    NS_XPCOM_CURRENT_PROCESS_DIR,
+    NS_GRE_DIR,
+    0 // This special value means:
+      //   search for ckbi in the directories on the shared
+      //   library/DLL search path
+  };
+
+  for (size_t il = 0; il < sizeof(possible_ckbi_locations)/sizeof(const char*); ++il) {
+    nsAutoCString libDir;
+
+    if (possible_ckbi_locations[il]) {
+      nsCOMPtr<nsIFile> mozFile;
+      if (possible_ckbi_locations[il] == nss_lib) {
+        // Get the location of the nss3 library.
+        char* nss_path = PR_GetLibraryFilePathname(DLL_PREFIX "nss3" DLL_SUFFIX,
+                                                   (PRFuncPtr) NSS_Initialize);
+        if (!nss_path) {
+          continue;
+        }
+        // Get the directory containing the nss3 library.
+        nsCOMPtr<nsIFile> nssLib(do_CreateInstance(NS_LOCAL_FILE_CONTRACTID, &rv));
+        if (NS_SUCCEEDED(rv)) {
+          rv = nssLib->InitWithNativePath(nsDependentCString(nss_path));
+        }
+        PR_Free(nss_path);
+        if (NS_SUCCEEDED(rv)) {
+          nsCOMPtr<nsIFile> file;
+          if (NS_SUCCEEDED(nssLib->GetParent(getter_AddRefs(file)))) {
+            mozFile = do_QueryInterface(file);
+          }
+        }
+      } else {
+        directoryService->Get( possible_ckbi_locations[il],
+                               NS_GET_IID(nsIFile),
+                               getter_AddRefs(mozFile));
+      }
+
+      if (!mozFile) {
+        continue;
+      }
+
+      if (NS_FAILED(mozFile->GetNativePath(libDir))) {
+        continue;
+      }
+    }
+
+    NS_ConvertUTF16toUTF8 modNameUTF8(modName);
+    if (mozilla::psm::LoadLoadableRoots(
+            libDir.Length() > 0 ? libDir.get() : nullptr,
+            modNameUTF8.get()) == SECSuccess) {
+      break;
+    }
+  }
+}
+
+void
+nsNSSComponent::UnloadLoadableRoots()
+{
+  nsresult rv;
+  nsAutoString modName;
+  rv = GetPIPNSSBundleString("RootCertModuleName", modName);
+  if (NS_FAILED(rv)) return;
+
+  NS_ConvertUTF16toUTF8 modNameUTF8(modName);
+  ::mozilla::psm::UnloadLoadableRoots(modNameUTF8.get());
+}
+
+nsresult
+nsNSSComponent::ConfigureInternalPKCS11Token()
+{
+  nsNSSShutDownPreventionLock locker;
+  nsAutoString manufacturerID;
+  nsAutoString libraryDescription;
+  nsAutoString tokenDescription;
+  nsAutoString privateTokenDescription;
+  nsAutoString slotDescription;
+  nsAutoString privateSlotDescription;
+  nsAutoString fips140SlotDescription;
+  nsAutoString fips140TokenDescription;
+
+  nsresult rv;
+  rv = GetPIPNSSBundleString("ManufacturerID", manufacturerID);
+  if (NS_FAILED(rv)) return rv;
+
+  rv = GetPIPNSSBundleString("LibraryDescription", libraryDescription);
+  if (NS_FAILED(rv)) return rv;
+
+  rv = GetPIPNSSBundleString("TokenDescription", tokenDescription);
+  if (NS_FAILED(rv)) return rv;
+
+  rv = GetPIPNSSBundleString("PrivateTokenDescription", privateTokenDescription);
+  if (NS_FAILED(rv)) return rv;
+
+  rv = GetPIPNSSBundleString("SlotDescription", slotDescription);
+  if (NS_FAILED(rv)) return rv;
+
+  rv = GetPIPNSSBundleString("PrivateSlotDescription", privateSlotDescription);
+  if (NS_FAILED(rv)) return rv;
+
+  rv = GetPIPNSSBundleString("Fips140SlotDescription", fips140SlotDescription);
+  if (NS_FAILED(rv)) return rv;
+
+  rv = GetPIPNSSBundleString("Fips140TokenDescription", fips140TokenDescription);
+  if (NS_FAILED(rv)) return rv;
+
+  PK11_ConfigurePKCS11(NS_ConvertUTF16toUTF8(manufacturerID).get(),
+                       NS_ConvertUTF16toUTF8(libraryDescription).get(),
+                       NS_ConvertUTF16toUTF8(tokenDescription).get(),
+                       NS_ConvertUTF16toUTF8(privateTokenDescription).get(),
+                       NS_ConvertUTF16toUTF8(slotDescription).get(),
+                       NS_ConvertUTF16toUTF8(privateSlotDescription).get(),
+                       NS_ConvertUTF16toUTF8(fips140SlotDescription).get(),
+                       NS_ConvertUTF16toUTF8(fips140TokenDescription).get(),
+                       0, 0);
+  return NS_OK;
+}
+
+nsresult
+nsNSSComponent::InitializePIPNSSBundle()
+{
+  // Called during init only, no mutex required.
+
+  nsresult rv;
+  nsCOMPtr<nsIStringBundleService> bundleService(do_GetService(NS_STRINGBUNDLE_CONTRACTID, &rv));
+#ifdef ANDROID
+  MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
+  MOZ_RELEASE_ASSERT(bundleService);
+#endif
+  if (NS_FAILED(rv) || !bundleService)
+    return NS_ERROR_FAILURE;
+
+  bundleService->CreateBundle("chrome://pipnss/locale/pipnss.properties",
+                              getter_AddRefs(mPIPNSSBundle));
+#ifdef ANDROID
+  MOZ_RELEASE_ASSERT(mPIPNSSBundle);
+#endif
+  if (!mPIPNSSBundle)
+    rv = NS_ERROR_FAILURE;
+
+  bundleService->CreateBundle("chrome://pipnss/locale/nsserrors.properties",
+                              getter_AddRefs(mNSSErrorsBundle));
+#ifdef ANDROID
+  MOZ_RELEASE_ASSERT(mNSSErrorsBundle);
+#endif
+  if (!mNSSErrorsBundle)
+    rv = NS_ERROR_FAILURE;
+
+  return rv;
+}
+
+// Table of pref names and SSL cipher ID
+typedef struct {
+  const char* pref;
+  long id;
+  bool enabledByDefault;
+  bool weak;
+} 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
+};
+
+// Bit flags indicating what weak ciphers are enabled.
+// The bit index will correspond to the index in sCipherPrefs.
+// Wrtten by the main thread, read from any threads.
+static Atomic<uint32_t> sEnabledWeakCiphers;
+static_assert(MOZ_ARRAY_LENGTH(sCipherPrefs) - 1 <= sizeof(uint32_t) * CHAR_BIT,
+              "too many cipher suites");
+
+/*static*/ bool
+nsNSSComponent::AreAnyWeakCiphersEnabled()
+{
+  return !!sEnabledWeakCiphers;
+}
+
+/*static*/ void
+nsNSSComponent::UseWeakCiphersOnSocket(PRFileDesc* fd)
+{
+  const uint32_t enabledWeakCiphers = sEnabledWeakCiphers;
+  const CipherPref* const cp = sCipherPrefs;
+  for (size_t i = 0; cp[i].pref; ++i) {
+    if (enabledWeakCiphers & ((uint32_t)1 << i)) {
+      SSL_CipherPrefSet(fd, cp[i].id, 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 NPN_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()
+{
+  NS_ASSERTION(NS_IsMainThread(), "CipherSuiteChangeObserver::StartObserve() can only be accessed in main thread");
+  if (!sObserver) {
+    RefPtr<CipherSuiteChangeObserver> observer = new CipherSuiteChangeObserver();
+    nsresult rv = Preferences::AddStrongObserver(observer.get(), "security.");
+#ifdef ANDROID
+    MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
+#endif
+    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)
+{
+  NS_ASSERTION(NS_IsMainThread(), "CipherSuiteChangeObserver::Observe can only be accessed in 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);
+        if (cp[i].weak) {
+          // Weak ciphers will not be used by default even if they
+          // are enabled in prefs. They are only used on specific
+          // sockets as a part of a fallback mechanism.
+          // Only the main thread will change sEnabledWeakCiphers.
+          uint32_t enabledWeakCiphers = sEnabledWeakCiphers;
+          if (cipherEnabled) {
+            enabledWeakCiphers |= ((uint32_t)1 << i);
+          } else {
+            enabledWeakCiphers &= ~((uint32_t)1 << i);
+          }
+          sEnabledWeakCiphers = enabledWeakCiphers;
+        } else {
+          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
+
+// Caller must hold a lock on nsNSSComponent::mutex when calling this function
+void nsNSSComponent::setValidationOptions(bool isInitialSetting,
+                                          const MutexAutoLock& lock)
+{
+  // 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;
+  }
+
+  CertVerifier::OcspDownloadConfig odc;
+  CertVerifier::OcspStrictConfig osc;
+  CertVerifier::OcspGetConfig ogc;
+  uint32_t certShortLifetimeInDays;
+
+  GetRevocationBehaviorFromPrefs(&odc, &osc, &ogc, &certShortLifetimeInDays,
+                                 lock);
+  mDefaultCertVerifier = new SharedCertVerifier(odc, osc, ogc,
+                                                certShortLifetimeInDays,
+                                                pinningMode, sha1Mode,
+                                                nameMatchingMode,
+                                                netscapeStepUpPolicy,
+                                                ctMode);
+}
+
+// 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 = 3;
+
+  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;
+}
+
+static nsresult
+GetNSSProfilePath(nsAutoCString& aProfilePath)
+{
+  aProfilePath.Truncate();
+  const char* dbDirOverride = getenv("MOZPSM_NSSDBDIR_OVERRIDE");
+  if (dbDirOverride && strlen(dbDirOverride) > 0) {
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
+           ("Using specified MOZPSM_NSSDBDIR_OVERRIDE as NSS DB dir: %s\n",
+            dbDirOverride));
+    aProfilePath.Assign(dbDirOverride);
+    return NS_OK;
+  }
+
+  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)
+  // Native path will drop Unicode characters that cannot be mapped to system's
+  // codepage, using short (canonical) path as workaround.
+  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;
+  }
+  rv = profileFileWin->GetNativeCanonicalPath(aProfilePath);
+#else
+  rv = profileFile->GetNativePath(aProfilePath);
+#endif
+#ifdef ANDROID
+  MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
+#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;
+}
+
+nsresult
+nsNSSComponent::InitializeNSS()
+{
+  // Can be called both during init and profile change.
+  // Needs mutex protection.
+
+  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");
+
+  MutexAutoLock lock(mutex);
+
+#ifdef ANDROID
+  MOZ_RELEASE_ASSERT(!mNSSInitialized);
+#endif
+  if (mNSSInitialized) {
+    // We should never try to initialize NSS more than once in a process.
+    MOZ_ASSERT_UNREACHABLE("Trying to initialize NSS twice");
+    return NS_ERROR_FAILURE;
+  }
+
+  MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("NSS Initialization beginning\n"));
+
+  // The call to ConfigureInternalPKCS11Token needs to be done before NSS is initialized,
+  // but affects only static data.
+  // If we could assume i18n will not change between profiles, one call per application
+  // run were sufficient. As I can't predict what happens in the future, let's repeat
+  // this call for every re-init of NSS.
+
+  ConfigureInternalPKCS11Token();
+
+  nsAutoCString profileStr;
+  nsresult rv = GetNSSProfilePath(profileStr);
+#ifdef ANDROID
+  MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
+#endif
+  if (NS_FAILED(rv)) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  SECStatus init_rv = SECFailure;
+  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);
+#ifdef ANDROID
+    MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
+#endif
+    if (NS_FAILED(rv)) {
+      return rv;
+    }
+  }
+  MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("inSafeMode: %u\n", inSafeMode));
+
+  if (!nocertdb && !profileStr.IsEmpty()) {
+    // First try to initialize the NSS DB in read/write mode.
+    // Only load PKCS11 modules if we're not in safe mode.
+    init_rv = ::mozilla::psm::InitializeNSS(profileStr.get(), false, !inSafeMode);
+    // If that fails, attempt read-only mode.
+    if (init_rv != SECSuccess) {
+      MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("could not init NSS r/w in %s\n", profileStr.get()));
+      init_rv = ::mozilla::psm::InitializeNSS(profileStr.get(), true, !inSafeMode);
+    }
+    if (init_rv != SECSuccess) {
+      MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("could not init in r/o either\n"));
+    }
+  }
+  // If we haven't succeeded in initializing the DB in our profile
+  // directory or we don't have a profile at all, or the "security.nocertdb"
+  // pref has been set to "true", attempt to initialize with no DB.
+  if (nocertdb || init_rv != SECSuccess) {
+    init_rv = NSS_NoDB_Init(nullptr);
+#ifdef ANDROID
+    MOZ_RELEASE_ASSERT(init_rv == SECSuccess);
+#endif
+  }
+  if (init_rv != SECSuccess) {
+#ifdef ANDROID
+    MOZ_RELEASE_ASSERT(false);
+#endif
+    MOZ_LOG(gPIPNSSLog, LogLevel::Error, ("could not initialize NSS - panicking\n"));
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  // ensure we have an initial value for the content signer root
+  mContentSigningRootHash =
+    Preferences::GetString("security.content.signature.root_hash");
+
+  mNSSInitialized = true;
+
+  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();
+#ifdef ANDROID
+    MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
+#endif
+  if (NS_FAILED(rv)) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  DisableMD5();
+  LoadLoadableRoots();
+
+  rv = LoadExtendedValidationInfo();
+#ifdef ANDROID
+    MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
+#endif
+  if (NS_FAILED(rv)) {
+    MOZ_LOG(gPIPNSSLog, LogLevel::Error, ("failed to load EV info"));
+    return rv;
+  }
+
+  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_NPN and SSL_ENABLE_ALPN also require calling
+  // SSL_SetNextProtoNego in order for the extensions to be negotiated.
+  // WebRTC does not do that so it will not use NPN or ALPN even when these
+  // preferences are true.
+  SSL_OptionSetDefault(SSL_ENABLE_NPN,
+                       Preferences::GetBool("security.ssl.enable_npn",
+                                            NPN_ENABLED_DEFAULT));
+  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())) {
+#ifdef ANDROID
+    MOZ_RELEASE_ASSERT(false);
+#endif
+    MOZ_LOG(gPIPNSSLog, LogLevel::Error, ("Unable to initialize cipher suite settings\n"));
+    return NS_ERROR_FAILURE;
+  }
+
+  // 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) {
+#ifdef ANDROID
+    MOZ_RELEASE_ASSERT(false);
+#endif
+    return NS_ERROR_FAILURE;
+  }
+
+  // ensure the CertBlocklist is initialised
+  nsCOMPtr<nsICertBlocklist> certList = do_GetService(NS_CERTBLOCKLIST_CONTRACTID);
+#ifdef ANDROID
+  MOZ_RELEASE_ASSERT(certList);
+#endif
+  if (!certList) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // dynamic options from prefs
+  setValidationOptions(true, lock);
+
+#ifndef MOZ_NO_SMART_CARDS
+  LaunchSmartCardThreads();
+#endif
+
+  mozilla::pkix::RegisterErrorTable();
+
+  // Initialize the site security service
+  nsCOMPtr<nsISiteSecurityService> sssService =
+    do_GetService(NS_SSSERVICE_CONTRACTID);
+#ifdef ANDROID
+  MOZ_RELEASE_ASSERT(sssService);
+#endif
+  if (!sssService) {
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("Cannot initialize site security service\n"));
+    return NS_ERROR_FAILURE;
+  }
+
+  // Initialize the cert override service
+  nsCOMPtr<nsICertOverrideService> coService =
+    do_GetService(NS_CERTOVERRIDE_CONTRACTID);
+#ifdef ANDROID
+  MOZ_RELEASE_ASSERT(coService);
+#endif
+  if (!coService) {
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("Cannot initialize cert override service\n"));
+    return NS_ERROR_FAILURE;
+  }
+
+  if (PK11_IsFIPS()) {
+    Telemetry::Accumulate(Telemetry::FIPS_ENABLED, true);
+  }
+  MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("NSS Initialization done\n"));
+  return NS_OK;
+}
+
+void
+nsNSSComponent::ShutdownNSS()
+{
+  // Can be called both during init and profile change,
+  // needs mutex protection.
+
+  MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("nsNSSComponent::ShutdownNSS\n"));
+  MOZ_RELEASE_ASSERT(NS_IsMainThread());
+
+  MutexAutoLock lock(mutex);
+
+  if (mNSSInitialized) {
+    mNSSInitialized = false;
+
+    PK11_SetPasswordFunc((PK11PasswordFunc)nullptr);
+
+    Preferences::RemoveObserver(this, "security.");
+
+#ifdef XP_WIN
+    mFamilySafetyRoot = nullptr;
+    mEnterpriseRoots = nullptr;
+#endif
+
+#ifndef MOZ_NO_SMART_CARDS
+    ShutdownSmartCardThreads();
+#endif
+    SSL_ClearSessionCache();
+    // TLSServerSocket may be run with the session cache enabled. This ensures
+    // those resources are cleaned up.
+    Unused << SSL_ShutdownServerSessionIDCache();
+
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("evaporating psm resources"));
+    if (NS_FAILED(nsNSSShutDownList::evaporateAllNSSResources())) {
+      MOZ_LOG(gPIPNSSLog, LogLevel::Error, ("failed to evaporate resources"));
+      return;
+    }
+    UnloadLoadableRoots();
+    EnsureNSSInitialized(nssShutdown);
+    if (SECSuccess != ::NSS_Shutdown()) {
+      MOZ_LOG(gPIPNSSLog, LogLevel::Error, ("NSS SHUTDOWN FAILURE"));
+    } else {
+      MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("NSS shutdown =====>> OK <<====="));
+    }
+  }
+}
+
+nsresult
+nsNSSComponent::Init()
+{
+  MOZ_RELEASE_ASSERT(NS_IsMainThread());
+  if (!NS_IsMainThread()) {
+    return NS_ERROR_NOT_SAME_THREAD;
+  }
+
+  nsresult rv = NS_OK;
+
+  MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("Beginning NSS initialization\n"));
+
+  rv = InitializePIPNSSBundle();
+#ifdef ANDROID
+  MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
+#endif
+  if (NS_FAILED(rv)) {
+    MOZ_LOG(gPIPNSSLog, LogLevel::Error, ("Unable to create pipnss bundle.\n"));
+    return rv;
+  }
+
+  // Access our string bundles now, this prevents assertions from I/O
+  // - nsStandardURL not thread-safe
+  // - wrong thread: 'NS_IsMainThread()' in nsIOService.cpp
+  // when loading error strings on the SSL threads.
+  {
+    NS_NAMED_LITERAL_STRING(dummy_name, "dummy");
+    nsXPIDLString result;
+    mPIPNSSBundle->GetStringFromName(dummy_name.get(),
+                                     getter_Copies(result));
+    mNSSErrorsBundle->GetStringFromName(dummy_name.get(),
+                                        getter_Copies(result));
+  }
+
+
+  rv = InitializeNSS();
+#ifdef ANDROID
+  MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
+#endif
+  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)
+{
+  if (nsCRT::strcmp(aTopic, PROFILE_BEFORE_CHANGE_TOPIC) == 0) {
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("receiving profile change topic\n"));
+    DoProfileBeforeChange();
+  } else if (nsCRT::strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID) == 0) {
+    nsNSSShutDownPreventionLock locker;
+    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_npn")) {
+      SSL_OptionSetDefault(SSL_ENABLE_NPN,
+                           Preferences::GetBool("security.ssl.enable_npn",
+                                                NPN_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.Equals("security.ssl.disable_session_identifiers")) {
+      ConfigureTLSSessionIdentifiers();
+    } else if (prefName.EqualsLiteral("security.OCSP.enabled") ||
+               prefName.EqualsLiteral("security.OCSP.require") ||
+               prefName.EqualsLiteral("security.OCSP.GET.enabled") ||
+               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")) {
+      MutexAutoLock lock(mutex);
+      setValidationOptions(false, lock);
+#ifdef DEBUG
+    } else if (prefName.EqualsLiteral("security.test.built_in_root_hash")) {
+      MutexAutoLock lock(mutex);
+      mTestBuiltInRootHash = Preferences::GetString("security.test.built_in_root_hash");
+#endif // DEBUG
+    } else if (prefName.Equals(kFamilySafetyModePref)) {
+      MaybeEnableFamilySafetyCompatibility();
+    } else if (prefName.EqualsLiteral("security.content.signature.root_hash")) {
+      MutexAutoLock lock(mutex);
+      mContentSigningRootHash =
+        Preferences::GetString("security.content.signature.root_hash");
+    } else if (prefName.Equals(kEnterpriseRootModePref)) {
+      MaybeImportEnterpriseRoots();
+    } 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;
+}
+
+/*static*/ nsresult
+nsNSSComponent::ShowAlertWithConstructedString(const nsString& message)
+{
+  nsCOMPtr<nsIPrompt> prompter;
+  nsresult rv = GetNewPrompter(getter_AddRefs(prompter));
+  if (prompter) {
+    rv = prompter->Alert(nullptr, message.get());
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+nsNSSComponent::ShowAlertFromStringBundle(const char* messageID)
+{
+  nsString message;
+  nsresult rv;
+
+  rv = GetPIPNSSBundleString(messageID, message);
+  if (NS_FAILED(rv)) {
+    NS_ERROR("GetPIPNSSBundleString failed");
+    return rv;
+  }
+
+  return ShowAlertWithConstructedString(message);
+}
+
+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();
+
+  return nsNSSShutDownList::doPK11Logout();
+}
+
+nsresult
+nsNSSComponent::RegisterObservers()
+{
+  // Happens once during init only, no mutex protection.
+
+  nsCOMPtr<nsIObserverService> observerService(
+    do_GetService("@mozilla.org/observer-service;1"));
+#ifdef ANDROID
+    MOZ_RELEASE_ASSERT(observerService);
+#endif
+  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);
+
+  return NS_OK;
+}
+
+void
+nsNSSComponent::DoProfileBeforeChange()
+{
+  bool needsCleanup = true;
+
+  {
+    MutexAutoLock lock(mutex);
+
+    if (!mNSSInitialized) {
+      // Make sure we don't try to cleanup if we have already done so.
+      // This makes sure we behave safely, in case we are notified
+      // multiple times.
+      needsCleanup = false;
+    }
+  }
+
+  if (needsCleanup) {
+    ShutdownNSS();
+  }
+}
+
+NS_IMETHODIMP
+nsNSSComponent::IsNSSInitialized(bool* initialized)
+{
+  MutexAutoLock lock(mutex);
+  *initialized = mNSSInitialized;
+  return NS_OK;
+}
+
+#ifdef DEBUG
+NS_IMETHODIMP
+nsNSSComponent::IsCertTestBuiltInRoot(CERTCertificate* cert, bool& result)
+{
+  MutexAutoLock lock(mutex);
+  MOZ_ASSERT(mNSSInitialized);
+
+  result = false;
+
+  if (mTestBuiltInRootHash.IsEmpty()) {
+    return NS_OK;
+  }
+
+  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;
+  }
+
+  result = mTestBuiltInRootHash.Equals(certHash);
+  return NS_OK;
+}
+#endif // DEBUG
+
+NS_IMETHODIMP
+nsNSSComponent::IsCertContentSigningRoot(CERTCertificate* cert, bool& result)
+{
+  MutexAutoLock lock(mutex);
+  MOZ_ASSERT(mNSSInitialized);
+
+  result = false;
+
+  if (mContentSigningRootHash.IsEmpty()) {
+    MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("mContentSigningRootHash is empty"));
+    return NS_ERROR_FAILURE;
+  }
+
+  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;
+  }
+
+  result = mContentSigningRootHash.Equals(certHash);
+  return NS_OK;
+}
+
+SharedCertVerifier::~SharedCertVerifier() { }
+
+already_AddRefed<SharedCertVerifier>
+nsNSSComponent::GetDefaultCertVerifier()
+{
+  MutexAutoLock lock(mutex);
+  MOZ_ASSERT(mNSSInitialized);
+  RefPtr<SharedCertVerifier> certVerifier(mDefaultCertVerifier);
+  return certVerifier.forget();
+}
+
+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 nssComponent->GetDefaultCertVerifier();
+  }
+
+  return nullptr;
+}
+
+} } // 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,
+            nsNSSShutDownPreventionLock& /*proofOfLock*/)
+{
+  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;
+    NS_ConvertUTF8toUTF16 tokenName(PK11_GetTokenName(slot));
+    rv = dialogs->SetPassword(ctx, tokenName.get(), &canceled);
+    if (NS_FAILED(rv)) {
+      return rv;
+    }
+
+    if (canceled) {
+      return NS_ERROR_NOT_AVAILABLE;
+    }
+  }
+
+  return NS_OK;
+}
+
+namespace mozilla {
+namespace psm {
+
+nsresult
+InitializeCipherSuite()
+{
+  NS_ASSERTION(NS_IsMainThread(), "InitializeCipherSuite() can only be accessed in main thread");
+
+  if (NSS_SetDomesticPolicy() != SECSuccess) {
+#ifdef ANDROID
+    MOZ_RELEASE_ASSERT(false);
+#endif
+    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
+  uint32_t enabledWeakCiphers = 0;
+  const CipherPref* const cp = sCipherPrefs;
+  for (size_t i = 0; cp[i].pref; ++i) {
+    bool cipherEnabled = Preferences::GetBool(cp[i].pref,
+                                              cp[i].enabledByDefault);
+    if (cp[i].weak) {
+      // Weak ciphers are not used by default. See the comment
+      // in CipherSuiteChangeObserver::Observe for details.
+      if (cipherEnabled) {
+        enabledWeakCiphers |= ((uint32_t)1 << i);
+      }
+    } else {
+      SSL_CipherPrefSetDefault(cp[i].id, cipherEnabled);
+    }
+  }
+  sEnabledWeakCiphers = enabledWeakCiphers;
+
+  // 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(pip_ucs2_ascii_conversion_fn);
+
+  // 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