[tbb-commits] [tor-browser] 02/08: Bug 1722489 - Evaluate HSTS before https-only in NS_ShouldSecureUpgrade. r=ckerschb, necko-reviewers, kershaw

gitolite role git at cupani.torproject.org
Tue Aug 23 15:45:13 UTC 2022


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richard pushed a commit to branch tor-browser-91.13.0esr-11.5-1
in repository tor-browser.

commit 59ba109bb0c8a3967e80d047569beef159f73db3
Author: lyavor <lyavor at mozilla.com>
AuthorDate: Mon Oct 11 13:51:53 2021 +0000

    Bug 1722489 - Evaluate HSTS before https-only in NS_ShouldSecureUpgrade. r=ckerschb,necko-reviewers,kershaw
    
    Differential Revision: https://phabricator.services.mozilla.com/D126238
---
 dom/security/test/https-only/browser.ini          |   3 +
 dom/security/test/https-only/browser_hsts_host.js | 111 +++++++
 dom/security/test/https-only/hsts_headers.sjs     |  24 ++
 netwerk/base/nsNetUtil.cpp                        | 354 ++++++++++++----------
 4 files changed, 338 insertions(+), 154 deletions(-)

diff --git a/dom/security/test/https-only/browser.ini b/dom/security/test/https-only/browser.ini
index bfe3b05140614..5797ace1adb1d 100644
--- a/dom/security/test/https-only/browser.ini
+++ b/dom/security/test/https-only/browser.ini
@@ -16,3 +16,6 @@ support-files =
 [browser_user_gesture.js]
 support-files =
   file_user_gesture.html
+[browser_hsts_host.js]
+support-files =
+  hsts_headers.sjs
diff --git a/dom/security/test/https-only/browser_hsts_host.js b/dom/security/test/https-only/browser_hsts_host.js
new file mode 100644
index 0000000000000..2bef7ffe44813
--- /dev/null
+++ b/dom/security/test/https-only/browser_hsts_host.js
@@ -0,0 +1,111 @@
+// Bug 1722489 - HTTPS-Only Mode - Tests evaluation order
+// https://bugzilla.mozilla.org/show_bug.cgi?id=1722489
+// This test ensures that an http request to an hsts host
+// gets upgraded by hsts and not by https-only.
+"use strict";
+
+// Set bools to track that tests ended.
+let readMessage = false;
+let testFinished = false;
+// Visit a secure site that sends an HSTS header to set up the rest of the
+// test.
+add_task(async function see_hsts_header() {
+  let setHstsUrl =
+    getRootDirectory(gTestPath).replace(
+      "chrome://mochitests/content",
+      "https://example.com"
+    ) + "hsts_headers.sjs";
+  Services.obs.addObserver(observer, "http-on-examine-response");
+  await BrowserTestUtils.loadURI(gBrowser.selectedBrowser, setHstsUrl);
+
+  await BrowserTestUtils.waitForCondition(() => readMessage);
+  // Clean up
+  Services.obs.removeObserver(observer, "http-on-examine-response");
+});
+
+// Test that HTTPS_Only is not performed if HSTS host is visited.
+add_task(async function() {
+  // A longer timeout is necessary for this test than the plain mochitests
+  // due to opening a new tab with the web console.
+  requestLongerTimeout(4);
+
+  // Enable HTTPS-Only Mode and register console-listener
+  await SpecialPowers.pushPrefEnv({
+    set: [["dom.security.https_only_mode", true]],
+  });
+  Services.console.registerListener(onNewMessage);
+  const RESOURCE_LINK =
+    getRootDirectory(gTestPath).replace(
+      "chrome://mochitests/content",
+      "http://example.com"
+    ) + "hsts_headers.sjs";
+
+  // 1. Upgrade page to https://
+  await BrowserTestUtils.loadURI(gBrowser.selectedBrowser, RESOURCE_LINK);
+
+  await BrowserTestUtils.waitForCondition(() => testFinished);
+
+  // Clean up
+  Services.console.unregisterListener(onNewMessage);
+});
+
+add_task(async function() {
+  // Reset HSTS header
+  readMessage = false;
+  let clearHstsUrl =
+    getRootDirectory(gTestPath).replace(
+      "chrome://mochitests/content",
+      "https://example.com"
+    ) + "hsts_headers.sjs?reset";
+
+  Services.obs.addObserver(observer, "http-on-examine-response");
+  // reset hsts header
+  await BrowserTestUtils.loadURI(gBrowser.selectedBrowser, clearHstsUrl);
+  await BrowserTestUtils.waitForCondition(() => readMessage);
+  // Clean up
+  Services.obs.removeObserver(observer, "http-on-examine-response");
+});
+
+function observer(subject, topic, state) {
+  info("observer called with " + topic);
+  if (topic == "http-on-examine-response") {
+    onExamineResponse(subject);
+  }
+}
+
+function onExamineResponse(subject) {
+  let channel = subject.QueryInterface(Ci.nsIHttpChannel);
+  info("onExamineResponse with " + channel.URI.spec);
+  if (channel.URI.spec.includes("reset")) {
+    try {
+      let hsts = channel.getResponseHeader("Strict-Transport-Security");
+      is(hsts, "max-age=0", "HSTS header is not set");
+    } catch (e) {
+      ok(false, "HSTS header still set");
+    }
+    readMessage = true;
+    return;
+  }
+  try {
+    let hsts = channel.getResponseHeader("Strict-Transport-Security");
+    let csp = channel.getResponseHeader("Content-Security-Policy");
+    // Check that HSTS and CSP upgrade headers are set
+    is(hsts, "max-age=60", "HSTS header is set");
+    is(csp, "upgrade-insecure-requests", "CSP header is set");
+  } catch (e) {
+    ok(false, "No header set");
+  }
+  readMessage = true;
+}
+
+function onNewMessage(msgObj) {
+  const message = msgObj.message;
+  // ensure that request is not upgraded HTTPS-Only.
+  if (message.includes("Upgrading insecure request")) {
+    ok(false, "Top-Level upgrade shouldn't get logged");
+    testFinished = true;
+  } else if (gBrowser.selectedBrowser.currentURI.scheme === "https") {
+    ok(true, "Top-Level upgrade shouldn't get logged");
+    testFinished = true;
+  }
+}
diff --git a/dom/security/test/https-only/hsts_headers.sjs b/dom/security/test/https-only/hsts_headers.sjs
new file mode 100644
index 0000000000000..72e82caaf3466
--- /dev/null
+++ b/dom/security/test/https-only/hsts_headers.sjs
@@ -0,0 +1,24 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function handleRequest(request, response) {
+  if (request.queryString === "reset") {
+    // Reset the HSTS policy, prevent influencing other tests
+    response.setStatusLine(request.httpVersion, 200, "OK");
+    response.setHeader("Strict-Transport-Security", "max-age=0");
+    response.write("Resetting HSTS");
+    return;
+  }
+  let hstsHeader = "max-age=60";
+  response.setHeader("Strict-Transport-Security", hstsHeader);
+  response.setHeader("Cache-Control", "no-cache", false);
+  response.setHeader("Content-Type", "text/html", false);
+  // Set header for csp upgrade
+  response.setHeader(
+    "Content-Security-Policy",
+    "upgrade-insecure-requests",
+    false
+  );
+  response.setStatusLine(request.httpVersion, 200);
+  response.write("<!DOCTYPE html><html><body><h1>Ok!</h1></body></html>");
+}
diff --git a/netwerk/base/nsNetUtil.cpp b/netwerk/base/nsNetUtil.cpp
index e7602ce75e3b4..824f0979e506e 100644
--- a/netwerk/base/nsNetUtil.cpp
+++ b/netwerk/base/nsNetUtil.cpp
@@ -2827,6 +2827,112 @@ bool NS_IsSrcdocChannel(nsIChannel* aChannel) {
   return false;
 }
 
+// helper function for NS_ShouldSecureUpgrade for checking HSTS
+bool handleResultFunc(bool aAllowSTS, bool aIsStsHost, uint32_t aHstsSource) {
+  if (aIsStsHost) {
+    LOG(("nsHttpChannel::Connect() STS permissions found\n"));
+    if (aAllowSTS) {
+      Telemetry::AccumulateCategorical(
+          Telemetry::LABELS_HTTP_SCHEME_UPGRADE_TYPE::STS);
+      switch (aHstsSource) {
+        case nsISiteSecurityService::SOURCE_PRELOAD_LIST:
+          Telemetry::Accumulate(Telemetry::HSTS_UPGRADE_SOURCE, 0);
+          break;
+        case nsISiteSecurityService::SOURCE_ORGANIC_REQUEST:
+          Telemetry::Accumulate(Telemetry::HSTS_UPGRADE_SOURCE, 1);
+          break;
+        case nsISiteSecurityService::SOURCE_UNKNOWN:
+        default:
+          // record this as an organic request
+          Telemetry::Accumulate(Telemetry::HSTS_UPGRADE_SOURCE, 1);
+          break;
+      }
+      return true;
+    }
+    Telemetry::AccumulateCategorical(
+        Telemetry::LABELS_HTTP_SCHEME_UPGRADE_TYPE::PrefBlockedSTS);
+  } else {
+    Telemetry::AccumulateCategorical(
+        Telemetry::LABELS_HTTP_SCHEME_UPGRADE_TYPE::NoReasonToUpgrade);
+  }
+  return false;
+};
+// That function is a helper function of NS_ShouldSecureUpgrade to check if
+// CSP upgrade-insecure-requests, Mixed content auto upgrading or HTTPs-Only/-
+// First should upgrade the given request.
+static bool ShouldSecureUpgradeNoHSTS(nsIURI* aURI, nsILoadInfo* aLoadInfo) {
+  // 2. CSP upgrade-insecure-requests
+  if (aLoadInfo->GetUpgradeInsecureRequests()) {
+    // let's log a message to the console that we are upgrading a request
+    nsAutoCString scheme;
+    aURI->GetScheme(scheme);
+    // append the additional 's' for security to the scheme :-)
+    scheme.AppendLiteral("s");
+    NS_ConvertUTF8toUTF16 reportSpec(aURI->GetSpecOrDefault());
+    NS_ConvertUTF8toUTF16 reportScheme(scheme);
+    AutoTArray<nsString, 2> params = {reportSpec, reportScheme};
+    uint32_t innerWindowId = aLoadInfo->GetInnerWindowID();
+    CSP_LogLocalizedStr("upgradeInsecureRequest", params,
+                        u""_ns,  // aSourceFile
+                        u""_ns,  // aScriptSample
+                        0,       // aLineNumber
+                        0,       // aColumnNumber
+                        nsIScriptError::warningFlag,
+                        "upgradeInsecureRequest"_ns, innerWindowId,
+                        !!aLoadInfo->GetOriginAttributes().mPrivateBrowsingId);
+    Telemetry::AccumulateCategorical(
+        Telemetry::LABELS_HTTP_SCHEME_UPGRADE_TYPE::CSP);
+    return true;
+  }
+  // 3. Mixed content auto upgrading
+  if (aLoadInfo->GetBrowserUpgradeInsecureRequests()) {
+    // let's log a message to the console that we are upgrading a request
+    nsAutoCString scheme;
+    aURI->GetScheme(scheme);
+    // append the additional 's' for security to the scheme :-)
+    scheme.AppendLiteral("s");
+    NS_ConvertUTF8toUTF16 reportSpec(aURI->GetSpecOrDefault());
+    NS_ConvertUTF8toUTF16 reportScheme(scheme);
+    AutoTArray<nsString, 2> params = {reportSpec, reportScheme};
+
+    nsAutoString localizedMsg;
+    nsContentUtils::FormatLocalizedString(nsContentUtils::eSECURITY_PROPERTIES,
+                                          "MixedContentAutoUpgrade", params,
+                                          localizedMsg);
+
+    // Prepending ixed Content to the outgoing console message
+    nsString message;
+    message.AppendLiteral(u"Mixed Content: ");
+    message.Append(localizedMsg);
+
+    uint32_t innerWindowId = aLoadInfo->GetInnerWindowID();
+    nsContentUtils::ReportToConsoleByWindowID(
+        message, nsIScriptError::warningFlag, "Mixed Content Message"_ns,
+        innerWindowId, aURI);
+
+    // Set this flag so we know we'll upgrade because of
+    // 'security.mixed_content.upgrade_display_content'.
+    aLoadInfo->SetBrowserDidUpgradeInsecureRequests(true);
+    Telemetry::AccumulateCategorical(
+        Telemetry::LABELS_HTTP_SCHEME_UPGRADE_TYPE::BrowserDisplay);
+
+    return true;
+  }
+
+  // 4. Https-Only / -First
+  if (nsHTTPSOnlyUtils::ShouldUpgradeRequest(aURI, aLoadInfo) ||
+      nsHTTPSOnlyUtils::ShouldUpgradeHttpsFirstRequest(aURI, aLoadInfo)) {
+    return true;
+  }
+  return false;
+}
+
+// Check if channel should be upgraded. check in the following order:
+// 1. HSTS
+// 2. CSP upgrade-insecure-requests
+// 3. Mixed content auto upgrading
+// 4. Https-Only / first
+// (5. Https RR - will be checked in nsHttpChannel)
 nsresult NS_ShouldSecureUpgrade(
     nsIURI* aURI, nsILoadInfo* aLoadInfo, nsIPrincipal* aChannelResultPrincipal,
     bool aPrivateBrowsing, bool aAllowSTS,
@@ -2839,6 +2945,7 @@ nsresult NS_ShouldSecureUpgrade(
   }
 
   aWillCallback = false;
+  aShouldUpgrade = false;
 
   // Even if we're in private browsing mode, we still enforce existing STS
   // data (it is read-only).
@@ -2846,166 +2953,105 @@ nsresult NS_ShouldSecureUpgrade(
   // a superdomain wants to force HTTPS, do it.
   bool isHttps = aURI->SchemeIs("https");
 
-  if (!isHttps &&
-      !nsMixedContentBlocker::IsPotentiallyTrustworthyLoopbackURL(aURI)) {
-    if (aLoadInfo) {
-      // Check if the request can get upgraded with the HTTPS-Only mode
-      if (nsHTTPSOnlyUtils::ShouldUpgradeRequest(aURI, aLoadInfo) ||
-          nsHTTPSOnlyUtils::ShouldUpgradeHttpsFirstRequest(aURI, aLoadInfo)) {
-        aShouldUpgrade = true;
-        return NS_OK;
-      }
-
-      // If any of the documents up the chain to the root document makes use of
-      // the CSP directive 'upgrade-insecure-requests', then it's time to
-      // fulfill the promise to CSP and mixed content blocking to upgrade the
-      // channel from http to https.
-      if (aLoadInfo->GetUpgradeInsecureRequests() ||
-          aLoadInfo->GetBrowserUpgradeInsecureRequests()) {
-        // let's log a message to the console that we are upgrading a request
-        nsAutoCString scheme;
-        aURI->GetScheme(scheme);
-        // append the additional 's' for security to the scheme :-)
-        scheme.AppendLiteral("s");
-        NS_ConvertUTF8toUTF16 reportSpec(aURI->GetSpecOrDefault());
-        NS_ConvertUTF8toUTF16 reportScheme(scheme);
-
-        if (aLoadInfo->GetUpgradeInsecureRequests()) {
-          AutoTArray<nsString, 2> params = {reportSpec, reportScheme};
-          uint32_t innerWindowId = aLoadInfo->GetInnerWindowID();
-          CSP_LogLocalizedStr(
-              "upgradeInsecureRequest", params,
-              u""_ns,  // aSourceFile
-              u""_ns,  // aScriptSample
-              0,       // aLineNumber
-              0,       // aColumnNumber
-              nsIScriptError::warningFlag, "upgradeInsecureRequest"_ns,
-              innerWindowId,
-              !!aLoadInfo->GetOriginAttributes().mPrivateBrowsingId);
-          Telemetry::AccumulateCategorical(
-              Telemetry::LABELS_HTTP_SCHEME_UPGRADE_TYPE::CSP);
-        } else {
-          AutoTArray<nsString, 2> params = {reportSpec, reportScheme};
-
-          nsAutoString localizedMsg;
-          nsContentUtils::FormatLocalizedString(
-              nsContentUtils::eSECURITY_PROPERTIES, "MixedContentAutoUpgrade",
-              params, localizedMsg);
-
-          // Prepending ixed Content to the outgoing console message
-          nsString message;
-          message.AppendLiteral(u"Mixed Content: ");
-          message.Append(localizedMsg);
-
-          uint32_t innerWindowId = aLoadInfo->GetInnerWindowID();
-          nsContentUtils::ReportToConsoleByWindowID(
-              message, nsIScriptError::warningFlag, "Mixed Content Message"_ns,
-              innerWindowId, aURI);
-
-          // Set this flag so we know we'll upgrade because of
-          // 'security.mixed_content.upgrade_display_content'.
-          aLoadInfo->SetBrowserDidUpgradeInsecureRequests(true);
-          Telemetry::AccumulateCategorical(
-              Telemetry::LABELS_HTTP_SCHEME_UPGRADE_TYPE::BrowserDisplay);
-        }
-
-        aShouldUpgrade = true;
-        return NS_OK;
-      }
-    }
-
-    // enforce Strict-Transport-Security
-    nsISiteSecurityService* sss = gHttpHandler->GetSSService();
-    NS_ENSURE_TRUE(sss, NS_ERROR_OUT_OF_MEMORY);
-
-    bool isStsHost = false;
-    uint32_t hstsSource = 0;
-    uint32_t flags =
-        aPrivateBrowsing ? nsISocketProvider::NO_PERMANENT_STORAGE : 0;
-
-    auto handleResultFunc = [aAllowSTS](bool aIsStsHost, uint32_t aHstsSource) {
-      if (aIsStsHost) {
-        LOG(("nsHttpChannel::Connect() STS permissions found\n"));
-        if (aAllowSTS) {
-          Telemetry::AccumulateCategorical(
-              Telemetry::LABELS_HTTP_SCHEME_UPGRADE_TYPE::STS);
-          switch (aHstsSource) {
-            case nsISiteSecurityService::SOURCE_PRELOAD_LIST:
-              Telemetry::Accumulate(Telemetry::HSTS_UPGRADE_SOURCE, 0);
-              break;
-            case nsISiteSecurityService::SOURCE_ORGANIC_REQUEST:
-              Telemetry::Accumulate(Telemetry::HSTS_UPGRADE_SOURCE, 1);
-              break;
-            case nsISiteSecurityService::SOURCE_UNKNOWN:
-            default:
-              // record this as an organic request
-              Telemetry::Accumulate(Telemetry::HSTS_UPGRADE_SOURCE, 1);
-              break;
-          }
-          return true;
-        }
-        Telemetry::AccumulateCategorical(
-            Telemetry::LABELS_HTTP_SCHEME_UPGRADE_TYPE::PrefBlockedSTS);
-      } else {
-        Telemetry::AccumulateCategorical(
-            Telemetry::LABELS_HTTP_SCHEME_UPGRADE_TYPE::NoReasonToUpgrade);
+  // If request is https, then there is nothing to do here.
+  if (isHttps) {
+    Telemetry::AccumulateCategorical(
+        Telemetry::LABELS_HTTP_SCHEME_UPGRADE_TYPE::AlreadyHTTPS);
+    aShouldUpgrade = false;
+    return NS_OK;
+  }
+  // If it is a mixed content trustworthy loopback, then we shouldn't upgrade
+  // it.
+  if (nsMixedContentBlocker::IsPotentiallyTrustworthyLoopbackURL(aURI)) {
+    aShouldUpgrade = false;
+    return NS_OK;
+  }
+  // If no loadInfo exist there is nothing to upgrade here.
+  if (!aLoadInfo) {
+    aShouldUpgrade = false;
+    return NS_OK;
+  }
+  MOZ_ASSERT(!aURI->SchemeIs("https"));
+
+  // enforce Strict-Transport-Security
+  nsISiteSecurityService* sss = gHttpHandler->GetSSService();
+  NS_ENSURE_TRUE(sss, NS_ERROR_OUT_OF_MEMORY);
+
+  bool isStsHost = false;
+  uint32_t hstsSource = 0;
+  uint32_t flags =
+      aPrivateBrowsing ? nsISocketProvider::NO_PERMANENT_STORAGE : 0;
+  // Calling |IsSecureURI| before the storage is ready to read will
+  // block the main thread. Once the storage is ready, we can call it
+  // from main thread.
+  static Atomic<bool, Relaxed> storageReady(false);
+  if (!storageReady && gSocketTransportService && aResultCallback) {
+    nsCOMPtr<nsILoadInfo> loadInfo = aLoadInfo;
+    nsCOMPtr<nsIURI> uri = aURI;
+    auto callbackWrapper = [resultCallback{std::move(aResultCallback)}, uri,
+                            loadInfo](bool aShouldUpgrade, nsresult aStatus) {
+      MOZ_ASSERT(NS_IsMainThread());
+
+      // 1. HSTS upgrade
+      if (aShouldUpgrade || NS_FAILED(aStatus)) {
+        resultCallback(aShouldUpgrade, aStatus);
+        return;
       }
-      return false;
+      // Check if we need to upgrade because of other reasons.
+      // 2. CSP upgrade-insecure-requests
+      // 3. Mixed content auto upgrading
+      // 4. Https-Only / first
+      bool shouldUpgrade = ShouldSecureUpgradeNoHSTS(uri, loadInfo);
+      resultCallback(shouldUpgrade, aStatus);
     };
+    nsCOMPtr<nsISiteSecurityService> service = sss;
+    nsresult rv = gSocketTransportService->Dispatch(
+        NS_NewRunnableFunction(
+            "net::NS_ShouldSecureUpgrade",
+            [service{std::move(service)}, uri{std::move(uri)}, flags(flags),
+             originAttributes(aOriginAttributes),
+             handleResultFunc{std::move(handleResultFunc)},
+             callbackWrapper{std::move(callbackWrapper)},
+             allowSTS{std::move(aAllowSTS)}]() mutable {
+              bool isStsHost = false;
+              uint32_t hstsSource = 0;
+              nsresult rv =
+                  service->IsSecureURI(uri, flags, originAttributes, nullptr,
+                                       &hstsSource, &isStsHost);
+
+              // Successfully get the result from |IsSecureURI| implies that
+              // the storage is ready to read.
+              storageReady = NS_SUCCEEDED(rv);
+              bool shouldUpgrade =
+                  handleResultFunc(allowSTS, isStsHost, hstsSource);
+              // Check if request should be upgraded.
+              NS_DispatchToMainThread(NS_NewRunnableFunction(
+                  "net::NS_ShouldSecureUpgrade::ResultCallback",
+                  [rv, shouldUpgrade,
+                   callbackWrapper{std::move(callbackWrapper)}]() {
+                    callbackWrapper(shouldUpgrade, rv);
+                  }));
+            }),
+        NS_DISPATCH_NORMAL);
+    aWillCallback = NS_SUCCEEDED(rv);
+    return rv;
+  }
 
-    // Calling |IsSecureURI| before the storage is ready to read will
-    // block the main thread. Once the storage is ready, we can call it
-    // from main thread.
-    static Atomic<bool, Relaxed> storageReady(false);
-    if (!storageReady && gSocketTransportService && aResultCallback) {
-      nsCOMPtr<nsIURI> uri = aURI;
-      nsCOMPtr<nsISiteSecurityService> service = sss;
-      nsresult rv = gSocketTransportService->Dispatch(
-          NS_NewRunnableFunction(
-              "net::NS_ShouldSecureUpgrade",
-              [service{std::move(service)}, uri{std::move(uri)}, flags(flags),
-               originAttributes(aOriginAttributes),
-               handleResultFunc{std::move(handleResultFunc)},
-               resultCallback{std::move(aResultCallback)}]() mutable {
-                uint32_t hstsSource = 0;
-                bool isStsHost = false;
-                nsresult rv =
-                    service->IsSecureURI(uri, flags, originAttributes, nullptr,
-                                         &hstsSource, &isStsHost);
-
-                // Successfully get the result from |IsSecureURI| implies that
-                // the storage is ready to read.
-                storageReady = NS_SUCCEEDED(rv);
-                bool shouldUpgrade = handleResultFunc(isStsHost, hstsSource);
-
-                NS_DispatchToMainThread(NS_NewRunnableFunction(
-                    "net::NS_ShouldSecureUpgrade::ResultCallback",
-                    [rv, shouldUpgrade,
-                     resultCallback{std::move(resultCallback)}]() {
-                      resultCallback(shouldUpgrade, rv);
-                    }));
-              }),
-          NS_DISPATCH_NORMAL);
-      aWillCallback = NS_SUCCEEDED(rv);
-      return rv;
-    }
-
-    nsresult rv = sss->IsSecureURI(aURI, flags, aOriginAttributes, nullptr,
-                                   &hstsSource, &isStsHost);
+  nsresult rv = sss->IsSecureURI(aURI, flags, aOriginAttributes, nullptr,
+                                 &hstsSource, &isStsHost);
 
-    // if the SSS check fails, it's likely because this load is on a
-    // malformed URI or something else in the setup is wrong, so any error
-    // should be reported.
-    NS_ENSURE_SUCCESS(rv, rv);
+  // if the SSS check fails, it's likely because this load is on a
+  // malformed URI or something else in the setup is wrong, so any error
+  // should be reported.
+  NS_ENSURE_SUCCESS(rv, rv);
 
-    aShouldUpgrade = handleResultFunc(isStsHost, hstsSource);
-    return NS_OK;
+  aShouldUpgrade = handleResultFunc(aAllowSTS, isStsHost, hstsSource);
+  if (!aShouldUpgrade) {
+    // Check for CSP upgrade-insecure-requests, Mixed content auto upgrading
+    // and Https-Only / -First.
+    aShouldUpgrade = ShouldSecureUpgradeNoHSTS(aURI, aLoadInfo);
   }
-
-  Telemetry::AccumulateCategorical(
-      Telemetry::LABELS_HTTP_SCHEME_UPGRADE_TYPE::AlreadyHTTPS);
-  aShouldUpgrade = false;
-  return NS_OK;
+  return rv;
 }
 
 nsresult NS_GetSecureUpgradedURI(nsIURI* aURI, nsIURI** aUpgradedURI) {

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