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-rw-r--r--netwerk/protocol/http/TlsHandshaker.cpp317
1 files changed, 317 insertions, 0 deletions
diff --git a/netwerk/protocol/http/TlsHandshaker.cpp b/netwerk/protocol/http/TlsHandshaker.cpp
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index 0000000000..88f0062516
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+++ b/netwerk/protocol/http/TlsHandshaker.cpp
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=4 sw=2 sts=2 et cin: */
+/* 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/. */
+
+// HttpLog.h should generally be included first
+#include "HttpLog.h"
+
+#include "TlsHandshaker.h"
+#include "mozilla/StaticPrefs_network.h"
+#include "nsHttpConnection.h"
+#include "nsHttpConnectionInfo.h"
+#include "nsHttpHandler.h"
+#include "nsITLSSocketControl.h"
+
+#define TLS_EARLY_DATA_NOT_AVAILABLE 0
+#define TLS_EARLY_DATA_AVAILABLE_BUT_NOT_USED 1
+#define TLS_EARLY_DATA_AVAILABLE_AND_USED 2
+
+namespace mozilla::net {
+
+NS_IMPL_ISUPPORTS(TlsHandshaker, nsITlsHandshakeCallbackListener)
+
+TlsHandshaker::TlsHandshaker(nsHttpConnectionInfo* aInfo,
+ nsHttpConnection* aOwner)
+ : mConnInfo(aInfo), mOwner(aOwner) {
+ LOG(("TlsHandshaker ctor %p", this));
+}
+
+TlsHandshaker::~TlsHandshaker() { LOG(("TlsHandshaker dtor %p", this)); }
+
+NS_IMETHODIMP
+TlsHandshaker::HandshakeDone() {
+ LOG(("TlsHandshaker::HandshakeDone mOwner=%p", mOwner.get()));
+ if (mOwner) {
+ mTlsHandshakeComplitionPending = true;
+
+ // HandshakeDone needs to be dispatched so that it is not called inside
+ // nss locks.
+ RefPtr<TlsHandshaker> self(this);
+ NS_DispatchToCurrentThread(NS_NewRunnableFunction(
+ "TlsHandshaker::HandshakeDoneInternal", [self{std::move(self)}]() {
+ if (self->mTlsHandshakeComplitionPending && self->mOwner) {
+ self->mOwner->HandshakeDoneInternal();
+ self->mTlsHandshakeComplitionPending = false;
+ }
+ }));
+ }
+ return NS_OK;
+}
+
+void TlsHandshaker::SetupSSL(bool aInSpdyTunnel, bool aForcePlainText) {
+ if (!mOwner) {
+ return;
+ }
+
+ LOG1(("TlsHandshaker::SetupSSL %p caps=0x%X %s\n", mOwner.get(),
+ mOwner->TransactionCaps(), mConnInfo->HashKey().get()));
+
+ if (mSetupSSLCalled) { // do only once
+ return;
+ }
+ mSetupSSLCalled = true;
+
+ if (mNPNComplete) {
+ return;
+ }
+
+ // we flip this back to false if SetNPNList succeeds at the end
+ // of this function
+ mNPNComplete = true;
+
+ if (!mConnInfo->FirstHopSSL() || aForcePlainText) {
+ return;
+ }
+
+ // if we are connected to the proxy with TLS, start the TLS
+ // flow immediately without waiting for a CONNECT sequence.
+ DebugOnly<nsresult> rv{};
+ if (aInSpdyTunnel) {
+ rv = InitSSLParams(false, true);
+ } else {
+ bool usingHttpsProxy = mConnInfo->UsingHttpsProxy();
+ rv = InitSSLParams(usingHttpsProxy, usingHttpsProxy);
+ }
+ MOZ_ASSERT(NS_SUCCEEDED(rv));
+}
+
+nsresult TlsHandshaker::InitSSLParams(bool connectingToProxy,
+ bool proxyStartSSL) {
+ LOG(("TlsHandshaker::InitSSLParams [mOwner=%p] connectingToProxy=%d\n",
+ mOwner.get(), connectingToProxy));
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ if (!mOwner) {
+ return NS_ERROR_ABORT;
+ }
+
+ nsCOMPtr<nsITLSSocketControl> ssl;
+ mOwner->GetTLSSocketControl(getter_AddRefs(ssl));
+ if (!ssl) {
+ return NS_ERROR_FAILURE;
+ }
+
+ // If proxy is use or 0RTT is excluded for a origin, don't use early-data.
+ if (mConnInfo->UsingProxy() || gHttpHandler->Is0RttTcpExcluded(mConnInfo)) {
+ ssl->DisableEarlyData();
+ }
+
+ if (proxyStartSSL) {
+ nsresult rv = ssl->ProxyStartSSL();
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+ }
+
+ if (NS_SUCCEEDED(
+ SetupNPNList(ssl, mOwner->TransactionCaps(), connectingToProxy)) &&
+ NS_SUCCEEDED(ssl->SetHandshakeCallbackListener(this))) {
+ LOG(("InitSSLParams Setting up SPDY Negotiation OK mOwner=%p",
+ mOwner.get()));
+ mNPNComplete = false;
+ }
+
+ return NS_OK;
+}
+
+// The naming of NPN is historical - this function creates the basic
+// offer list for both NPN and ALPN. ALPN validation callbacks are made
+// now before the handshake is complete, and NPN validation callbacks
+// are made during the handshake.
+nsresult TlsHandshaker::SetupNPNList(nsITLSSocketControl* ssl, uint32_t caps,
+ bool connectingToProxy) {
+ nsTArray<nsCString> protocolArray;
+
+ // The first protocol is used as the fallback if none of the
+ // protocols supported overlap with the server's list.
+ // When using ALPN the advertised preferences are protocolArray indicies
+ // {1, .., N, 0} in decreasing order.
+ // For NPN, In the case of overlap, matching priority is driven by
+ // the order of the server's advertisement - with index 0 used when
+ // there is no match.
+ protocolArray.AppendElement("http/1.1"_ns);
+
+ if (StaticPrefs::network_http_http2_enabled() &&
+ (connectingToProxy || !(caps & NS_HTTP_DISALLOW_SPDY)) &&
+ !(connectingToProxy && (caps & NS_HTTP_DISALLOW_HTTP2_PROXY))) {
+ LOG(("nsHttpConnection::SetupSSL Allow SPDY NPN selection"));
+ const SpdyInformation* info = gHttpHandler->SpdyInfo();
+ if (info->ALPNCallbacks(ssl)) {
+ protocolArray.AppendElement(info->VersionString);
+ }
+ } else {
+ LOG(("nsHttpConnection::SetupSSL Disallow SPDY NPN selection"));
+ }
+
+ nsresult rv = ssl->SetNPNList(protocolArray);
+ LOG(("TlsHandshaker::SetupNPNList %p %" PRIx32 "\n", mOwner.get(),
+ static_cast<uint32_t>(rv)));
+ return rv;
+}
+
+// Checks if TLS handshake is needed and it is responsible to move it forward.
+bool TlsHandshaker::EnsureNPNComplete() {
+ if (!mOwner) {
+ mNPNComplete = true;
+ return true;
+ }
+
+ nsCOMPtr<nsISocketTransport> transport = mOwner->Transport();
+ MOZ_ASSERT(transport);
+ if (!transport) {
+ // this cannot happen
+ mNPNComplete = true;
+ return true;
+ }
+
+ if (mNPNComplete) {
+ return true;
+ }
+
+ if (mTlsHandshakeComplitionPending) {
+ return false;
+ }
+
+ nsCOMPtr<nsITLSSocketControl> ssl;
+ mOwner->GetTLSSocketControl(getter_AddRefs(ssl));
+ if (!ssl) {
+ FinishNPNSetup(false, false);
+ return true;
+ }
+
+ if (!m0RTTChecked) {
+ // We reuse m0RTTChecked. We want to send this status only once.
+ RefPtr<nsAHttpTransaction> transaction = mOwner->Transaction();
+ nsCOMPtr<nsISocketTransport> transport = mOwner->Transport();
+ if (transaction && transport) {
+ transaction->OnTransportStatus(transport,
+ NS_NET_STATUS_TLS_HANDSHAKE_STARTING, 0);
+ }
+ }
+
+ LOG(("TlsHandshaker::EnsureNPNComplete [mOwner=%p] drive TLS handshake",
+ mOwner.get()));
+ nsresult rv = ssl->DriveHandshake();
+ if (NS_FAILED(rv) && rv != NS_BASE_STREAM_WOULD_BLOCK) {
+ FinishNPNSetup(false, true);
+ return true;
+ }
+
+ Check0RttEnabled(ssl);
+ return false;
+}
+
+void TlsHandshaker::EarlyDataDone() {
+ if (mEarlyDataState == EarlyData::USED) {
+ mEarlyDataState = EarlyData::DONE_USED;
+ } else if (mEarlyDataState == EarlyData::CANNOT_BE_USED) {
+ mEarlyDataState = EarlyData::DONE_CANNOT_BE_USED;
+ } else if (mEarlyDataState == EarlyData::NOT_AVAILABLE) {
+ mEarlyDataState = EarlyData::DONE_NOT_AVAILABLE;
+ }
+}
+
+void TlsHandshaker::FinishNPNSetup(bool handshakeSucceeded,
+ bool hasSecurityInfo) {
+ LOG(("TlsHandshaker::FinishNPNSetup mOwner=%p", mOwner.get()));
+ mNPNComplete = true;
+
+ mOwner->PostProcessNPNSetup(handshakeSucceeded, hasSecurityInfo,
+ EarlyDataUsed());
+ EarlyDataDone();
+}
+
+void TlsHandshaker::Check0RttEnabled(nsITLSSocketControl* ssl) {
+ if (!mOwner) {
+ return;
+ }
+
+ if (m0RTTChecked) {
+ return;
+ }
+
+ m0RTTChecked = true;
+
+ if (mConnInfo->UsingProxy()) {
+ return;
+ }
+
+ // There is no ALPN info (yet!). We need to consider doing 0RTT. We
+ // will do so if there is ALPN information from a previous session
+ // (AlpnEarlySelection), we are using HTTP/1, and the request data can
+ // be safely retried.
+ if (NS_FAILED(ssl->GetAlpnEarlySelection(mEarlyNegotiatedALPN))) {
+ LOG1(
+ ("TlsHandshaker::Check0RttEnabled %p - "
+ "early selected alpn not available",
+ mOwner.get()));
+ } else {
+ LOG1(
+ ("TlsHandshaker::Check0RttEnabled %p -"
+ "early selected alpn: %s",
+ mOwner.get(), mEarlyNegotiatedALPN.get()));
+ const SpdyInformation* info = gHttpHandler->SpdyInfo();
+ if (!mEarlyNegotiatedALPN.Equals(info->VersionString)) {
+ // This is the HTTP/1 case.
+ // Check if early-data is allowed for this transaction.
+ RefPtr<nsAHttpTransaction> transaction = mOwner->Transaction();
+ if (transaction && transaction->Do0RTT()) {
+ LOG(
+ ("TlsHandshaker::Check0RttEnabled [mOwner=%p] - We "
+ "can do 0RTT (http/1)!",
+ mOwner.get()));
+ mEarlyDataState = EarlyData::USED;
+ } else {
+ mEarlyDataState = EarlyData::CANNOT_BE_USED;
+ // Poll for read now. Polling for write will cause us to busy wait.
+ // When the handshake is done the polling flags will be set correctly.
+ Unused << mOwner->ResumeRecv();
+ }
+ } else {
+ // We have h2, we can at least 0-RTT the preamble and opening
+ // SETTINGS, etc, and maybe some of the first request
+ LOG(
+ ("TlsHandshaker::Check0RttEnabled [mOwner=%p] - Starting "
+ "0RTT for h2!",
+ mOwner.get()));
+ mEarlyDataState = EarlyData::USED;
+ mOwner->Start0RTTSpdy(info->Version);
+ }
+ }
+}
+
+void TlsHandshaker::EarlyDataTelemetry(int16_t tlsVersion,
+ bool earlyDataAccepted,
+ int64_t aContentBytesWritten0RTT) {
+ // Send the 0RTT telemetry only for tls1.3
+ if (tlsVersion > nsITLSSocketControl::TLS_VERSION_1_2) {
+ Telemetry::Accumulate(Telemetry::TLS_EARLY_DATA_NEGOTIATED,
+ (mEarlyDataState == EarlyData::NOT_AVAILABLE)
+ ? TLS_EARLY_DATA_NOT_AVAILABLE
+ : ((mEarlyDataState == EarlyData::USED)
+ ? TLS_EARLY_DATA_AVAILABLE_AND_USED
+ : TLS_EARLY_DATA_AVAILABLE_BUT_NOT_USED));
+ if (EarlyDataUsed()) {
+ Telemetry::Accumulate(Telemetry::TLS_EARLY_DATA_ACCEPTED,
+ earlyDataAccepted);
+ }
+ if (earlyDataAccepted) {
+ Telemetry::Accumulate(Telemetry::TLS_EARLY_DATA_BYTES_WRITTEN,
+ aContentBytesWritten0RTT);
+ }
+ }
+}
+
+} // namespace mozilla::net