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fune/security/manager/ssl/nsNSSCallbacks.cpp
Dana Keeler d6331d843b Bug 177175 - cancel subsequent PKCS#11 password prompts if more than one happens concurrently r=jschanck 
Unfortunately, since NSS can prompt for PKCS#11 authentication on the main
thread, the prompt in question results in a nested event loop, which means that
the prompt code can be re-entered and another prompt can appear before the
first is dealt with. As long as NSS can run on the main thread, this will
continue to be the case. Recently we've done a lot of work to prevent NSS
running on the main thread, but that work is by no means complete. In the
meantime, we can paper over this situation by cancelling any prompts that come
after one that is still in progress. This will cause some NSS operations to
fail in a way that should be recoverable by simply retrying them (e.g. the user
can refresh the page or close and re-open it).

Differential Revision: https://phabricator.services.mozilla.com/D164280
2022-12-13 20:43:37 +00:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsNSSCallbacks.h"
#include "NSSSocketControl.h"
#include "PSMRunnable.h"
#include "ScopedNSSTypes.h"
#include "SharedCertVerifier.h"
#include "SharedSSLState.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/Assertions.h"
#include "mozilla/Casting.h"
#include "mozilla/Logging.h"
#include "mozilla/RefPtr.h"
#include "mozilla/ScopeExit.h"
#include "mozilla/Span.h"
#include "mozilla/SpinEventLoopUntil.h"
#include "mozilla/Telemetry.h"
#include "mozilla/Unused.h"
#include "mozilla/intl/Localization.h"
#include "nsContentUtils.h"
#include "nsIChannel.h"
#include "nsIHttpChannel.h"
#include "nsIHttpChannelInternal.h"
#include "nsIPrompt.h"
#include "nsIProtocolProxyService.h"
#include "nsISupportsPriority.h"
#include "nsIStreamLoader.h"
#include "nsIUploadChannel.h"
#include "nsIWebProgressListener.h"
#include "nsNSSCertHelper.h"
#include "nsNSSCertificate.h"
#include "nsNSSComponent.h"
#include "nsNSSHelper.h"
#include "nsNSSIOLayer.h"
#include "nsNetUtil.h"
#include "nsProxyRelease.h"
#include "nsStringStream.h"
#include "mozpkix/pkixtypes.h"
#include "ssl.h"
#include "sslproto.h"
#include "SSLTokensCache.h"
#include "TrustOverrideUtils.h"
#include "TrustOverride-SymantecData.inc"
#include "TrustOverride-AppleGoogleDigiCertData.inc"
using namespace mozilla;
using namespace mozilla::pkix;
using namespace mozilla::psm;
extern LazyLogModule gPIPNSSLog;
static void AccumulateCipherSuite(Telemetry::HistogramID probe,
const SSLChannelInfo& channelInfo);
namespace {
// Bits in bit mask for SSL_REASONS_FOR_NOT_FALSE_STARTING telemetry probe
// These bits are numbered so that the least subtle issues have higher values.
// This should make it easier for us to interpret the results.
const uint32_t POSSIBLE_VERSION_DOWNGRADE = 4;
const uint32_t POSSIBLE_CIPHER_SUITE_DOWNGRADE = 2;
const uint32_t KEA_NOT_SUPPORTED = 1;
} // namespace
class OCSPRequest final : public nsIStreamLoaderObserver, public nsIRunnable {
public:
OCSPRequest(const nsACString& aiaLocation,
const OriginAttributes& originAttributes,
const uint8_t (&ocspRequest)[OCSP_REQUEST_MAX_LENGTH],
size_t ocspRequestLength, TimeDuration timeout);
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSISTREAMLOADEROBSERVER
NS_DECL_NSIRUNNABLE
nsresult DispatchToMainThreadAndWait();
nsresult GetResponse(/*out*/ Vector<uint8_t>& response);
private:
~OCSPRequest() = default;
static void OnTimeout(nsITimer* timer, void* closure);
nsresult NotifyDone(nsresult rv, MonitorAutoLock& proofOfLock);
// mMonitor provides the memory barrier protecting these member variables.
// What happens is the originating thread creates an OCSPRequest object with
// the information necessary to perform an OCSP request. It sends the object
// to the main thread and waits on the monitor for the operation to complete.
// On the main thread, a channel is set up to perform the request. This gets
// dispatched to necko. At the same time, a timeout timer is initialized. If
// the necko request completes, the response data is filled out, mNotifiedDone
// is set to true, and the monitor is notified. The original thread then wakes
// up and continues with the results that have been filled out. If the request
// times out, again the response data is filled out, mNotifiedDone is set to
// true, and the monitor is notified. The first of these two events wins. That
// is, if the timeout timer fires but the request completes shortly after, the
// caller will see the request as having timed out.
// When the request completes (i.e. OnStreamComplete runs), the timer will be
// cancelled. This is how we know the closure in OnTimeout is valid. If the
// timer fires before OnStreamComplete runs, it should be safe to not cancel
// the request because necko has a strong reference to it.
Monitor mMonitor MOZ_UNANNOTATED;
bool mNotifiedDone;
nsCOMPtr<nsIStreamLoader> mLoader;
const nsCString mAIALocation;
const OriginAttributes mOriginAttributes;
const mozilla::Span<const char> mPOSTData;
const TimeDuration mTimeout;
nsCOMPtr<nsITimer> mTimeoutTimer;
TimeStamp mStartTime;
nsresult mResponseResult;
Vector<uint8_t> mResponseBytes;
};
NS_IMPL_ISUPPORTS(OCSPRequest, nsIStreamLoaderObserver, nsIRunnable)
OCSPRequest::OCSPRequest(const nsACString& aiaLocation,
const OriginAttributes& originAttributes,
const uint8_t (&ocspRequest)[OCSP_REQUEST_MAX_LENGTH],
size_t ocspRequestLength, TimeDuration timeout)
: mMonitor("OCSPRequest.mMonitor"),
mNotifiedDone(false),
mLoader(nullptr),
mAIALocation(aiaLocation),
mOriginAttributes(originAttributes),
mPOSTData(reinterpret_cast<const char*>(ocspRequest), ocspRequestLength),
mTimeout(timeout),
mTimeoutTimer(nullptr),
mStartTime(),
mResponseResult(NS_ERROR_FAILURE),
mResponseBytes() {
MOZ_ASSERT(ocspRequestLength <= OCSP_REQUEST_MAX_LENGTH);
}
nsresult OCSPRequest::DispatchToMainThreadAndWait() {
MOZ_ASSERT(!NS_IsMainThread());
if (NS_IsMainThread()) {
return NS_ERROR_FAILURE;
}
MonitorAutoLock lock(mMonitor);
nsresult rv = NS_DispatchToMainThread(this);
if (NS_FAILED(rv)) {
return rv;
}
while (!mNotifiedDone) {
lock.Wait();
}
TimeStamp endTime = TimeStamp::Now();
// CERT_VALIDATION_HTTP_REQUEST_RESULT:
// 0: request timed out
// 1: request succeeded
// 2: request failed
// 3: internal error
// If mStartTime was never set, we consider this an internal error.
// Otherwise, we managed to at least send the request.
if (mStartTime.IsNull()) {
Telemetry::Accumulate(Telemetry::CERT_VALIDATION_HTTP_REQUEST_RESULT, 3);
} else if (mResponseResult == NS_ERROR_NET_TIMEOUT) {
Telemetry::Accumulate(Telemetry::CERT_VALIDATION_HTTP_REQUEST_RESULT, 0);
Telemetry::AccumulateTimeDelta(
Telemetry::CERT_VALIDATION_HTTP_REQUEST_CANCELED_TIME, mStartTime,
endTime);
} else if (NS_SUCCEEDED(mResponseResult)) {
Telemetry::Accumulate(Telemetry::CERT_VALIDATION_HTTP_REQUEST_RESULT, 1);
Telemetry::AccumulateTimeDelta(
Telemetry::CERT_VALIDATION_HTTP_REQUEST_SUCCEEDED_TIME, mStartTime,
endTime);
} else {
Telemetry::Accumulate(Telemetry::CERT_VALIDATION_HTTP_REQUEST_RESULT, 2);
Telemetry::AccumulateTimeDelta(
Telemetry::CERT_VALIDATION_HTTP_REQUEST_FAILED_TIME, mStartTime,
endTime);
}
return rv;
}
nsresult OCSPRequest::GetResponse(/*out*/ Vector<uint8_t>& response) {
MOZ_ASSERT(!NS_IsMainThread());
if (NS_IsMainThread()) {
return NS_ERROR_FAILURE;
}
MonitorAutoLock lock(mMonitor);
if (!mNotifiedDone) {
return NS_ERROR_IN_PROGRESS;
}
if (NS_FAILED(mResponseResult)) {
return mResponseResult;
}
response.clear();
if (!response.append(mResponseBytes.begin(), mResponseBytes.length())) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
static constexpr auto OCSP_REQUEST_MIME_TYPE = "application/ocsp-request"_ns;
static constexpr auto OCSP_REQUEST_METHOD = "POST"_ns;
NS_IMETHODIMP
OCSPRequest::Run() {
MOZ_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return NS_ERROR_FAILURE;
}
MonitorAutoLock lock(mMonitor);
nsCOMPtr<nsIIOService> ios = do_GetIOService();
if (!ios) {
return NotifyDone(NS_ERROR_FAILURE, lock);
}
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_NewURI(getter_AddRefs(uri), mAIALocation);
if (NS_FAILED(rv)) {
return NotifyDone(NS_ERROR_MALFORMED_URI, lock);
}
nsAutoCString scheme;
rv = uri->GetScheme(scheme);
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
if (!scheme.LowerCaseEqualsLiteral("http")) {
return NotifyDone(NS_ERROR_MALFORMED_URI, lock);
}
// See bug 1219935.
// We should not send OCSP request if the PAC is still loading.
nsCOMPtr<nsIProtocolProxyService> pps =
do_GetService(NS_PROTOCOLPROXYSERVICE_CONTRACTID, &rv);
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
if (pps->GetIsPACLoading()) {
return NotifyDone(NS_ERROR_FAILURE, lock);
}
nsCOMPtr<nsIChannel> channel;
rv = ios->NewChannel(mAIALocation, nullptr, nullptr,
nullptr, // aLoadingNode
nsContentUtils::GetSystemPrincipal(),
nullptr, // aTriggeringPrincipal
nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_SEC_CONTEXT_IS_NULL,
nsIContentPolicy::TYPE_OTHER, getter_AddRefs(channel));
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
// Security operations scheduled through normal HTTP channels are given
// high priority to accommodate real time OCSP transactions.
nsCOMPtr<nsISupportsPriority> priorityChannel = do_QueryInterface(channel);
if (priorityChannel) {
priorityChannel->AdjustPriority(nsISupportsPriority::PRIORITY_HIGHEST);
}
channel->SetLoadFlags(
nsIRequest::LOAD_ANONYMOUS | nsIRequest::LOAD_BYPASS_CACHE |
nsIRequest::INHIBIT_CACHING | nsIChannel::LOAD_BYPASS_SERVICE_WORKER |
nsIChannel::LOAD_BYPASS_URL_CLASSIFIER);
nsCOMPtr<nsILoadInfo> loadInfo = channel->LoadInfo();
// Prevent HTTPS-Only Mode from upgrading the OCSP request.
uint32_t httpsOnlyStatus = loadInfo->GetHttpsOnlyStatus();
httpsOnlyStatus |= nsILoadInfo::HTTPS_ONLY_EXEMPT;
loadInfo->SetHttpsOnlyStatus(httpsOnlyStatus);
// allow deprecated HTTP request from SystemPrincipal
loadInfo->SetAllowDeprecatedSystemRequests(true);
// For OCSP requests, only the first party domain and private browsing id
// aspects of origin attributes are used. This means that:
// a) if first party isolation is enabled, OCSP requests will be isolated
// according to the first party domain of the original https request
// b) OCSP requests are shared across different containers as long as first
// party isolation is not enabled and none of the containers are in private
// browsing mode.
if (mOriginAttributes != OriginAttributes()) {
OriginAttributes attrs;
attrs.mFirstPartyDomain = mOriginAttributes.mFirstPartyDomain;
attrs.mPrivateBrowsingId = mOriginAttributes.mPrivateBrowsingId;
rv = loadInfo->SetOriginAttributes(attrs);
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
}
nsCOMPtr<nsIInputStream> uploadStream;
rv = NS_NewByteInputStream(getter_AddRefs(uploadStream), mPOSTData,
NS_ASSIGNMENT_COPY);
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
nsCOMPtr<nsIUploadChannel> uploadChannel(do_QueryInterface(channel));
if (!uploadChannel) {
return NotifyDone(NS_ERROR_FAILURE, lock);
}
rv = uploadChannel->SetUploadStream(uploadStream, OCSP_REQUEST_MIME_TYPE, -1);
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
// Do not use SPDY or HTTP3 for internal security operations. It could result
// in the silent upgrade to ssl, which in turn could require an SSL
// operation to fulfill something like an OCSP fetch, which is an
// endless loop.
nsCOMPtr<nsIHttpChannelInternal> internalChannel = do_QueryInterface(channel);
if (!internalChannel) {
return NotifyDone(rv, lock);
}
rv = internalChannel->SetAllowSpdy(false);
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
rv = internalChannel->SetAllowHttp3(false);
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
rv = internalChannel->SetIsOCSP(true);
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
nsCOMPtr<nsIHttpChannel> hchan = do_QueryInterface(channel);
if (!hchan) {
return NotifyDone(NS_ERROR_FAILURE, lock);
}
rv = hchan->SetAllowSTS(false);
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
rv = hchan->SetRequestMethod(OCSP_REQUEST_METHOD);
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
rv = NS_NewStreamLoader(getter_AddRefs(mLoader), this);
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
rv = NS_NewTimerWithFuncCallback(
getter_AddRefs(mTimeoutTimer), OCSPRequest::OnTimeout, this,
mTimeout.ToMilliseconds(), nsITimer::TYPE_ONE_SHOT, "OCSPRequest::Run");
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
rv = hchan->AsyncOpen(this->mLoader);
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
mStartTime = TimeStamp::Now();
return NS_OK;
}
nsresult OCSPRequest::NotifyDone(nsresult rv, MonitorAutoLock& lock) {
MOZ_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return NS_ERROR_FAILURE;
}
if (mNotifiedDone) {
return mResponseResult;
}
mLoader = nullptr;
mResponseResult = rv;
if (mTimeoutTimer) {
Unused << mTimeoutTimer->Cancel();
}
mNotifiedDone = true;
lock.Notify();
return rv;
}
NS_IMETHODIMP
OCSPRequest::OnStreamComplete(nsIStreamLoader* aLoader, nsISupports* aContext,
nsresult aStatus, uint32_t responseLen,
const uint8_t* responseBytes) {
MOZ_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return NS_ERROR_FAILURE;
}
MonitorAutoLock lock(mMonitor);
nsCOMPtr<nsIRequest> req;
nsresult rv = aLoader->GetRequest(getter_AddRefs(req));
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
if (NS_FAILED(aStatus)) {
return NotifyDone(aStatus, lock);
}
nsCOMPtr<nsIHttpChannel> hchan = do_QueryInterface(req);
if (!hchan) {
return NotifyDone(NS_ERROR_FAILURE, lock);
}
bool requestSucceeded;
rv = hchan->GetRequestSucceeded(&requestSucceeded);
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
if (!requestSucceeded) {
return NotifyDone(NS_ERROR_FAILURE, lock);
}
unsigned int rcode;
rv = hchan->GetResponseStatus(&rcode);
if (NS_FAILED(rv)) {
return NotifyDone(rv, lock);
}
if (rcode != 200) {
return NotifyDone(NS_ERROR_FAILURE, lock);
}
mResponseBytes.clear();
if (!mResponseBytes.append(responseBytes, responseLen)) {
return NotifyDone(NS_ERROR_OUT_OF_MEMORY, lock);
}
mResponseResult = aStatus;
return NotifyDone(NS_OK, lock);
}
void OCSPRequest::OnTimeout(nsITimer* timer, void* closure) {
MOZ_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return;
}
// We know the OCSPRequest is still alive because if the request had completed
// (i.e. OnStreamComplete ran), the timer would have been cancelled in
// NotifyDone.
OCSPRequest* self = static_cast<OCSPRequest*>(closure);
MonitorAutoLock lock(self->mMonitor);
self->mTimeoutTimer = nullptr;
self->NotifyDone(NS_ERROR_NET_TIMEOUT, lock);
}
mozilla::pkix::Result DoOCSPRequest(
const nsCString& aiaLocation, const OriginAttributes& originAttributes,
uint8_t (&ocspRequest)[OCSP_REQUEST_MAX_LENGTH], size_t ocspRequestLength,
TimeDuration timeout, /*out*/ Vector<uint8_t>& result) {
MOZ_ASSERT(!NS_IsMainThread());
if (NS_IsMainThread()) {
return mozilla::pkix::Result::ERROR_OCSP_UNKNOWN_CERT;
}
if (ocspRequestLength > OCSP_REQUEST_MAX_LENGTH) {
return mozilla::pkix::Result::FATAL_ERROR_LIBRARY_FAILURE;
}
result.clear();
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("DoOCSPRequest to '%s'", aiaLocation.get()));
nsCOMPtr<nsIEventTarget> sts =
do_GetService(NS_SOCKETTRANSPORTSERVICE_CONTRACTID);
MOZ_ASSERT(sts);
if (!sts) {
return mozilla::pkix::Result::FATAL_ERROR_INVALID_STATE;
}
bool onSTSThread;
nsresult rv = sts->IsOnCurrentThread(&onSTSThread);
if (NS_FAILED(rv)) {
return mozilla::pkix::Result::FATAL_ERROR_LIBRARY_FAILURE;
}
MOZ_ASSERT(!onSTSThread);
if (onSTSThread) {
return mozilla::pkix::Result::FATAL_ERROR_INVALID_STATE;
}
RefPtr<OCSPRequest> request(new OCSPRequest(
aiaLocation, originAttributes, ocspRequest, ocspRequestLength, timeout));
rv = request->DispatchToMainThreadAndWait();
if (NS_FAILED(rv)) {
return mozilla::pkix::Result::FATAL_ERROR_LIBRARY_FAILURE;
}
rv = request->GetResponse(result);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_MALFORMED_URI) {
return mozilla::pkix::Result::ERROR_CERT_BAD_ACCESS_LOCATION;
}
return mozilla::pkix::Result::ERROR_OCSP_SERVER_ERROR;
}
return Success;
}
static char* ShowProtectedAuthPrompt(PK11SlotInfo* slot, nsIPrompt* prompt) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(slot);
MOZ_ASSERT(prompt);
if (!NS_IsMainThread() || !slot || !prompt) {
return nullptr;
}
// Dispatch a background task to (eventually) call C_Login. The call will
// block until the protected authentication succeeds or fails.
Atomic<bool> done;
Atomic<SECStatus> result;
nsresult rv =
NS_DispatchBackgroundTask(NS_NewRunnableFunction(__func__, [&]() mutable {
result = PK11_CheckUserPassword(slot, nullptr);
done = true;
}));
if (NS_FAILED(rv)) {
return nullptr;
}
nsTArray<nsCString> resIds = {
"security/pippki/pippki.ftl"_ns,
};
RefPtr<mozilla::intl::Localization> l10n =
mozilla::intl::Localization::Create(resIds, true);
auto l10nId = "protected-auth-alert"_ns;
auto l10nArgs = mozilla::dom::Optional<intl::L10nArgs>();
l10nArgs.Construct();
auto dirArg = l10nArgs.Value().Entries().AppendElement();
dirArg->mKey = "tokenName"_ns;
dirArg->mValue.SetValue().SetAsUTF8String().Assign(PK11_GetTokenName(slot));
nsAutoCString promptString;
ErrorResult errorResult;
l10n->FormatValueSync(l10nId, l10nArgs, promptString, errorResult);
if (NS_FAILED(errorResult.StealNSResult())) {
return nullptr;
}
rv = prompt->Alert(nullptr, NS_ConvertUTF8toUTF16(promptString).get());
if (NS_FAILED(rv)) {
return nullptr;
}
MOZ_ALWAYS_TRUE(SpinEventLoopUntil(
"ShowProtectedAuthPrompt"_ns, [&]() { return static_cast<bool>(done); }));
switch (result) {
case SECSuccess:
return ToNewCString(nsDependentCString(PK11_PW_AUTHENTICATED));
case SECWouldBlock:
return ToNewCString(nsDependentCString(PK11_PW_RETRY));
default:
return nullptr;
}
}
class PK11PasswordPromptRunnable : public SyncRunnableBase {
public:
PK11PasswordPromptRunnable(PK11SlotInfo* slot, nsIInterfaceRequestor* ir)
: mResult(nullptr), mSlot(slot), mIR(ir) {}
virtual ~PK11PasswordPromptRunnable() = default;
char* mResult; // out
virtual void RunOnTargetThread() override;
private:
static bool mRunning;
PK11SlotInfo* mSlot;
nsIInterfaceRequestor* mIR;
};
bool PK11PasswordPromptRunnable::mRunning = false;
void PK11PasswordPromptRunnable::RunOnTargetThread() {
MOZ_ASSERT(NS_IsMainThread());
if (!NS_IsMainThread()) {
return;
}
// If we've reentered due to the nested event loop implicit in using
// nsIPrompt synchronously (or indeed the explicit nested event loop in the
// protected authentication case), bail early, cancelling the password
// prompt. This will probably cause the operation that resulted in the prompt
// to fail, but this is better than littering the screen with a bunch of
// password prompts that the user will probably just cancel anyway.
if (mRunning) {
return;
}
mRunning = true;
auto setRunningToFalseOnExit = MakeScopeExit([&]() { mRunning = false; });
nsresult rv;
nsCOMPtr<nsIPrompt> prompt;
if (!mIR) {
rv = nsNSSComponent::GetNewPrompter(getter_AddRefs(prompt));
if (NS_FAILED(rv)) {
return;
}
} else {
prompt = do_GetInterface(mIR);
MOZ_ASSERT(prompt, "Interface requestor should implement nsIPrompt");
}
if (!prompt) {
return;
}
if (PK11_ProtectedAuthenticationPath(mSlot)) {
mResult = ShowProtectedAuthPrompt(mSlot, prompt);
return;
}
nsAutoString promptString;
if (PK11_IsInternal(mSlot)) {
rv = GetPIPNSSBundleString("CertPasswordPromptDefault", promptString);
} else {
AutoTArray<nsString, 1> formatStrings = {
NS_ConvertUTF8toUTF16(PK11_GetTokenName(mSlot))};
rv = PIPBundleFormatStringFromName("CertPasswordPrompt", formatStrings,
promptString);
}
if (NS_FAILED(rv)) {
return;
}
nsString password;
bool userClickedOK = false;
rv = prompt->PromptPassword(nullptr, promptString.get(),
getter_Copies(password), &userClickedOK);
if (NS_FAILED(rv) || !userClickedOK) {
return;
}
mResult = ToNewUTF8String(password);
}
char* PK11PasswordPrompt(PK11SlotInfo* slot, PRBool /*retry*/, void* arg) {
if (!slot) {
return nullptr;
}
RefPtr<PK11PasswordPromptRunnable> runnable(new PK11PasswordPromptRunnable(
slot, static_cast<nsIInterfaceRequestor*>(arg)));
runnable->DispatchToMainThreadAndWait();
return runnable->mResult;
}
nsCString getKeaGroupName(uint32_t aKeaGroup) {
nsCString groupName;
switch (aKeaGroup) {
case ssl_grp_ec_secp256r1:
groupName = "P256"_ns;
break;
case ssl_grp_ec_secp384r1:
groupName = "P384"_ns;
break;
case ssl_grp_ec_secp521r1:
groupName = "P521"_ns;
break;
case ssl_grp_ec_curve25519:
groupName = "x25519"_ns;
break;
case ssl_grp_ffdhe_2048:
groupName = "FF 2048"_ns;
break;
case ssl_grp_ffdhe_3072:
groupName = "FF 3072"_ns;
break;
case ssl_grp_none:
groupName = "none"_ns;
break;
case ssl_grp_ffdhe_custom:
groupName = "custom"_ns;
break;
// All other groups are not enabled in Firefox. See namedGroups in
// nsNSSIOLayer.cpp.
default:
// This really shouldn't happen!
MOZ_ASSERT_UNREACHABLE("Invalid key exchange group.");
groupName = "unknown group"_ns;
}
return groupName;
}
nsCString getSignatureName(uint32_t aSignatureScheme) {
nsCString signatureName;
switch (aSignatureScheme) {
case ssl_sig_none:
signatureName = "none"_ns;
break;
case ssl_sig_rsa_pkcs1_sha1:
signatureName = "RSA-PKCS1-SHA1"_ns;
break;
case ssl_sig_rsa_pkcs1_sha256:
signatureName = "RSA-PKCS1-SHA256"_ns;
break;
case ssl_sig_rsa_pkcs1_sha384:
signatureName = "RSA-PKCS1-SHA384"_ns;
break;
case ssl_sig_rsa_pkcs1_sha512:
signatureName = "RSA-PKCS1-SHA512"_ns;
break;
case ssl_sig_ecdsa_secp256r1_sha256:
signatureName = "ECDSA-P256-SHA256"_ns;
break;
case ssl_sig_ecdsa_secp384r1_sha384:
signatureName = "ECDSA-P384-SHA384"_ns;
break;
case ssl_sig_ecdsa_secp521r1_sha512:
signatureName = "ECDSA-P521-SHA512"_ns;
break;
case ssl_sig_rsa_pss_sha256:
signatureName = "RSA-PSS-SHA256"_ns;
break;
case ssl_sig_rsa_pss_sha384:
signatureName = "RSA-PSS-SHA384"_ns;
break;
case ssl_sig_rsa_pss_sha512:
signatureName = "RSA-PSS-SHA512"_ns;
break;
case ssl_sig_ecdsa_sha1:
signatureName = "ECDSA-SHA1"_ns;
break;
case ssl_sig_rsa_pkcs1_sha1md5:
signatureName = "RSA-PKCS1-SHA1MD5"_ns;
break;
// All other groups are not enabled in Firefox. See sEnabledSignatureSchemes
// in nsNSSIOLayer.cpp.
default:
// This really shouldn't happen!
MOZ_ASSERT_UNREACHABLE("Invalid signature scheme.");
signatureName = "unknown signature"_ns;
}
return signatureName;
}
static void PreliminaryHandshakeDone(PRFileDesc* fd) {
NSSSocketControl* socketControl = (NSSSocketControl*)fd->higher->secret;
if (!socketControl) {
return;
}
if (socketControl->IsPreliminaryHandshakeDone()) {
return;
}
SSLChannelInfo channelInfo;
if (SSL_GetChannelInfo(fd, &channelInfo, sizeof(channelInfo)) != SECSuccess) {
return;
}
SSLCipherSuiteInfo cipherInfo;
if (SSL_GetCipherSuiteInfo(channelInfo.cipherSuite, &cipherInfo,
sizeof(cipherInfo)) != SECSuccess) {
return;
}
socketControl->SetPreliminaryHandshakeInfo(channelInfo, cipherInfo);
socketControl->SetSSLVersionUsed(channelInfo.protocolVersion);
socketControl->SetEarlyDataAccepted(channelInfo.earlyDataAccepted);
socketControl->SetKEAUsed(channelInfo.keaType);
socketControl->SetKEAKeyBits(channelInfo.keaKeyBits);
socketControl->SetMACAlgorithmUsed(cipherInfo.macAlgorithm);
// Get the NPN value.
SSLNextProtoState state;
unsigned char npnbuf[256];
unsigned int npnlen;
if (SSL_GetNextProto(fd, &state, npnbuf, &npnlen,
AssertedCast<unsigned int>(ArrayLength(npnbuf))) ==
SECSuccess) {
if (state == SSL_NEXT_PROTO_NEGOTIATED ||
state == SSL_NEXT_PROTO_SELECTED) {
socketControl->SetNegotiatedNPN(
BitwiseCast<char*, unsigned char*>(npnbuf), npnlen);
} else {
socketControl->SetNegotiatedNPN(nullptr, 0);
}
mozilla::Telemetry::Accumulate(Telemetry::SSL_NPN_TYPE, state);
} else {
socketControl->SetNegotiatedNPN(nullptr, 0);
}
socketControl->SetPreliminaryHandshakeDone();
}
SECStatus CanFalseStartCallback(PRFileDesc* fd, void* client_data,
PRBool* canFalseStart) {
*canFalseStart = false;
NSSSocketControl* infoObject = (NSSSocketControl*)fd->higher->secret;
if (!infoObject) {
PR_SetError(PR_INVALID_STATE_ERROR, 0);
return SECFailure;
}
infoObject->SetFalseStartCallbackCalled();
PreliminaryHandshakeDone(fd);
uint32_t reasonsForNotFalseStarting = 0;
SSLChannelInfo channelInfo;
if (SSL_GetChannelInfo(fd, &channelInfo, sizeof(channelInfo)) != SECSuccess) {
return SECSuccess;
}
SSLCipherSuiteInfo cipherInfo;
if (SSL_GetCipherSuiteInfo(channelInfo.cipherSuite, &cipherInfo,
sizeof(cipherInfo)) != SECSuccess) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("CanFalseStartCallback [%p] failed - "
" KEA %d\n",
fd, static_cast<int32_t>(channelInfo.keaType)));
return SECSuccess;
}
// Prevent version downgrade attacks from TLS 1.2, and avoid False Start for
// TLS 1.3 and later. See Bug 861310 for all the details as to why.
if (channelInfo.protocolVersion != SSL_LIBRARY_VERSION_TLS_1_2) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("CanFalseStartCallback [%p] failed - "
"SSL Version must be TLS 1.2, was %x\n",
fd, static_cast<int32_t>(channelInfo.protocolVersion)));
reasonsForNotFalseStarting |= POSSIBLE_VERSION_DOWNGRADE;
}
// See bug 952863 for why ECDHE is allowed, but DHE (and RSA) are not.
if (channelInfo.keaType != ssl_kea_ecdh) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("CanFalseStartCallback [%p] failed - "
"unsupported KEA %d\n",
fd, static_cast<int32_t>(channelInfo.keaType)));
reasonsForNotFalseStarting |= KEA_NOT_SUPPORTED;
}
// Prevent downgrade attacks on the symmetric cipher. We do not allow CBC
// mode due to BEAST, POODLE, and other attacks on the MAC-then-Encrypt
// design. See bug 1109766 for more details.
if (cipherInfo.macAlgorithm != ssl_mac_aead) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("CanFalseStartCallback [%p] failed - non-AEAD cipher used, %d, "
"is not supported with False Start.\n",
fd, static_cast<int32_t>(cipherInfo.symCipher)));
reasonsForNotFalseStarting |= POSSIBLE_CIPHER_SUITE_DOWNGRADE;
}
// XXX: An attacker can choose which protocols are advertised in the
// NPN extension. TODO(Bug 861311): We should restrict the ability
// of an attacker leverage this capability by restricting false start
// to the same protocol we previously saw for the server, after the
// first successful connection to the server.
Telemetry::Accumulate(Telemetry::SSL_REASONS_FOR_NOT_FALSE_STARTING,
reasonsForNotFalseStarting);
if (reasonsForNotFalseStarting == 0) {
*canFalseStart = PR_TRUE;
infoObject->SetFalseStarted();
infoObject->NoteTimeUntilReady();
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("CanFalseStartCallback [%p] ok\n", fd));
}
return SECSuccess;
}
static void AccumulateNonECCKeySize(Telemetry::HistogramID probe,
uint32_t bits) {
unsigned int value = bits < 512 ? 1
: bits == 512 ? 2
: bits < 768 ? 3
: bits == 768 ? 4
: bits < 1024 ? 5
: bits == 1024 ? 6
: bits < 1280 ? 7
: bits == 1280 ? 8
: bits < 1536 ? 9
: bits == 1536 ? 10
: bits < 2048 ? 11
: bits == 2048 ? 12
: bits < 3072 ? 13
: bits == 3072 ? 14
: bits < 4096 ? 15
: bits == 4096 ? 16
: bits < 8192 ? 17
: bits == 8192 ? 18
: bits < 16384 ? 19
: bits == 16384 ? 20
: 0;
Telemetry::Accumulate(probe, value);
}
// XXX: This attempts to map a bit count to an ECC named curve identifier. In
// the vast majority of situations, we only have the Suite B curves available.
// In that case, this mapping works fine. If we were to have more curves
// available, the mapping would be ambiguous since there could be multiple
// named curves for a given size (e.g. secp256k1 vs. secp256r1). We punt on
// that for now. See also NSS bug 323674.
static void AccumulateECCCurve(Telemetry::HistogramID probe, uint32_t bits) {
unsigned int value = bits == 255 ? 29 // Curve25519
: bits == 256 ? 23 // P-256
: bits == 384 ? 24 // P-384
: bits == 521 ? 25 // P-521
: 0; // Unknown
Telemetry::Accumulate(probe, value);
}
static void AccumulateCipherSuite(Telemetry::HistogramID probe,
const SSLChannelInfo& channelInfo) {
uint32_t value;
switch (channelInfo.cipherSuite) {
// ECDHE key exchange
case TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256:
value = 1;
break;
case TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256:
value = 2;
break;
case TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA:
value = 3;
break;
case TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA:
value = 4;
break;
case TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA:
value = 5;
break;
case TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA:
value = 6;
break;
case TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA:
value = 7;
break;
case TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA:
value = 10;
break;
case TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256:
value = 11;
break;
case TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256:
value = 12;
break;
case TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384:
value = 13;
break;
case TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384:
value = 14;
break;
// DHE key exchange
case TLS_DHE_RSA_WITH_AES_128_CBC_SHA:
value = 21;
break;
case TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA:
value = 22;
break;
case TLS_DHE_RSA_WITH_AES_256_CBC_SHA:
value = 23;
break;
case TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA:
value = 24;
break;
case TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA:
value = 25;
break;
case TLS_DHE_DSS_WITH_AES_128_CBC_SHA:
value = 26;
break;
case TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA:
value = 27;
break;
case TLS_DHE_DSS_WITH_AES_256_CBC_SHA:
value = 28;
break;
case TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA:
value = 29;
break;
case TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA:
value = 30;
break;
// ECDH key exchange
case TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA:
value = 41;
break;
case TLS_ECDH_RSA_WITH_AES_128_CBC_SHA:
value = 42;
break;
case TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA:
value = 43;
break;
case TLS_ECDH_RSA_WITH_AES_256_CBC_SHA:
value = 44;
break;
case TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA:
value = 45;
break;
case TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA:
value = 46;
break;
// RSA key exchange
case TLS_RSA_WITH_AES_128_CBC_SHA:
value = 61;
break;
case TLS_RSA_WITH_CAMELLIA_128_CBC_SHA:
value = 62;
break;
case TLS_RSA_WITH_AES_256_CBC_SHA:
value = 63;
break;
case TLS_RSA_WITH_CAMELLIA_256_CBC_SHA:
value = 64;
break;
case SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA:
value = 65;
break;
case TLS_RSA_WITH_3DES_EDE_CBC_SHA:
value = 66;
break;
case TLS_RSA_WITH_SEED_CBC_SHA:
value = 67;
break;
case TLS_RSA_WITH_AES_128_GCM_SHA256:
value = 68;
break;
case TLS_RSA_WITH_AES_256_GCM_SHA384:
value = 69;
break;
// TLS 1.3 PSK resumption
case TLS_AES_128_GCM_SHA256:
value = 70;
break;
case TLS_CHACHA20_POLY1305_SHA256:
value = 71;
break;
case TLS_AES_256_GCM_SHA384:
value = 72;
break;
// unknown
default:
value = 0;
break;
}
MOZ_ASSERT(value != 0);
Telemetry::Accumulate(probe, value);
}
void HandshakeCallback(PRFileDesc* fd, void* client_data) {
SECStatus rv;
NSSSocketControl* infoObject = (NSSSocketControl*)fd->higher->secret;
// Do the bookkeeping that needs to be done after the
// server's ServerHello...ServerHelloDone have been processed, but that
// doesn't need the handshake to be completed.
PreliminaryHandshakeDone(fd);
nsSSLIOLayerHelpers& ioLayerHelpers =
infoObject->SharedState().IOLayerHelpers();
SSLVersionRange versions(infoObject->GetTLSVersionRange());
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("[%p] HandshakeCallback: succeeded using TLS version range "
"(0x%04x,0x%04x)\n",
fd, static_cast<unsigned int>(versions.min),
static_cast<unsigned int>(versions.max)));
// If the handshake completed, then we know the site is TLS tolerant
ioLayerHelpers.rememberTolerantAtVersion(infoObject->GetHostName(),
infoObject->GetPort(), versions.max);
SSLChannelInfo channelInfo;
rv = SSL_GetChannelInfo(fd, &channelInfo, sizeof(channelInfo));
MOZ_ASSERT(rv == SECSuccess);
if (rv == SECSuccess) {
// Get the protocol version for telemetry
// 1=tls1, 2=tls1.1, 3=tls1.2
unsigned int versionEnum = channelInfo.protocolVersion & 0xFF;
MOZ_ASSERT(versionEnum > 0);
Telemetry::Accumulate(Telemetry::SSL_HANDSHAKE_VERSION, versionEnum);
AccumulateCipherSuite(infoObject->IsFullHandshake()
? Telemetry::SSL_CIPHER_SUITE_FULL
: Telemetry::SSL_CIPHER_SUITE_RESUMED,
channelInfo);
SSLCipherSuiteInfo cipherInfo;
rv = SSL_GetCipherSuiteInfo(channelInfo.cipherSuite, &cipherInfo,
sizeof cipherInfo);
MOZ_ASSERT(rv == SECSuccess);
if (rv == SECSuccess) {
// keyExchange null=0, rsa=1, dh=2, fortezza=3, ecdh=4
Telemetry::Accumulate(infoObject->IsFullHandshake()
? Telemetry::SSL_KEY_EXCHANGE_ALGORITHM_FULL
: Telemetry::SSL_KEY_EXCHANGE_ALGORITHM_RESUMED,
channelInfo.keaType);
if (infoObject->IsFullHandshake()) {
switch (channelInfo.keaType) {
case ssl_kea_rsa:
AccumulateNonECCKeySize(Telemetry::SSL_KEA_RSA_KEY_SIZE_FULL,
channelInfo.keaKeyBits);
break;
case ssl_kea_dh:
AccumulateNonECCKeySize(Telemetry::SSL_KEA_DHE_KEY_SIZE_FULL,
channelInfo.keaKeyBits);
break;
case ssl_kea_ecdh:
AccumulateECCCurve(Telemetry::SSL_KEA_ECDHE_CURVE_FULL,
channelInfo.keaKeyBits);
break;
default:
MOZ_CRASH("impossible KEA");
break;
}
Telemetry::Accumulate(Telemetry::SSL_AUTH_ALGORITHM_FULL,
channelInfo.authType);
// RSA key exchange doesn't use a signature for auth.
if (channelInfo.keaType != ssl_kea_rsa) {
switch (channelInfo.authType) {
case ssl_auth_rsa:
case ssl_auth_rsa_sign:
AccumulateNonECCKeySize(Telemetry::SSL_AUTH_RSA_KEY_SIZE_FULL,
channelInfo.authKeyBits);
break;
case ssl_auth_ecdsa:
AccumulateECCCurve(Telemetry::SSL_AUTH_ECDSA_CURVE_FULL,
channelInfo.authKeyBits);
break;
default:
MOZ_CRASH("impossible auth algorithm");
break;
}
}
}
Telemetry::Accumulate(infoObject->IsFullHandshake()
? Telemetry::SSL_SYMMETRIC_CIPHER_FULL
: Telemetry::SSL_SYMMETRIC_CIPHER_RESUMED,
cipherInfo.symCipher);
}
}
PRBool siteSupportsSafeRenego;
if (channelInfo.protocolVersion != SSL_LIBRARY_VERSION_TLS_1_3) {
rv = SSL_HandshakeNegotiatedExtension(fd, ssl_renegotiation_info_xtn,
&siteSupportsSafeRenego);
MOZ_ASSERT(rv == SECSuccess);
if (rv != SECSuccess) {
siteSupportsSafeRenego = false;
}
} else {
// TLS 1.3 dropped support for renegotiation.
siteSupportsSafeRenego = true;
}
bool renegotiationUnsafe = !siteSupportsSafeRenego &&
ioLayerHelpers.treatUnsafeNegotiationAsBroken();
bool deprecatedTlsVer =
(channelInfo.protocolVersion < SSL_LIBRARY_VERSION_TLS_1_2);
uint32_t state;
if (renegotiationUnsafe || deprecatedTlsVer) {
state = nsIWebProgressListener::STATE_IS_BROKEN;
} else {
state = nsIWebProgressListener::STATE_IS_SECURE;
SSLVersionRange defVersion;
rv = SSL_VersionRangeGetDefault(ssl_variant_stream, &defVersion);
if (rv == SECSuccess && versions.max >= defVersion.max) {
// we know this site no longer requires a version fallback
ioLayerHelpers.removeInsecureFallbackSite(infoObject->GetHostName(),
infoObject->GetPort());
}
}
if (infoObject->HasServerCert()) {
MOZ_LOG(gPIPNSSLog, LogLevel::Debug,
("HandshakeCallback KEEPING existing cert\n"));
} else {
infoObject->RebuildCertificateInfoFromSSLTokenCache();
}
// Check if the user has added an override for a certificate error.
if (infoObject->HasUserOverriddenCertificateError()) {
state |= nsIWebProgressListener::STATE_CERT_USER_OVERRIDDEN;
}
infoObject->SetSecurityState(state);
// XXX Bug 883674: We shouldn't be formatting messages here in PSM; instead,
// we should set a flag on the channel that higher (UI) level code can check
// to log the warning. In particular, these warnings should go to the web
// console instead of to the error console. Also, the warning is not
// localized.
if (!siteSupportsSafeRenego) {
NS_ConvertASCIItoUTF16 msg(infoObject->GetHostName());
msg.AppendLiteral(" : server does not support RFC 5746, see CVE-2009-3555");
nsContentUtils::LogSimpleConsoleError(
msg, "SSL"_ns, !!infoObject->GetOriginAttributes().mPrivateBrowsingId,
true /* from chrome context */);
}
infoObject->NoteTimeUntilReady();
infoObject->SetHandshakeCompleted();
}
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