[tbb-commits] [tor-browser/tor-browser-91.5.0esr-11.5-2] Bug 23247: Communicating security expectations for .onion
richard at torproject.org
richard at torproject.org
Tue Feb 1 13:45:17 UTC 2022
commit 6e5144990a08dbbc61d57b8072c67262ac002ed3
Author: Richard Pospesel <richard at torproject.org>
Date: Fri Jun 8 13:38:40 2018 -0700
Bug 23247: Communicating security expectations for .onion
Encrypting pages hosted on Onion Services with SSL/TLS is redundant
(in terms of hiding content) as all traffic within the Tor network is
already fully encrypted. Therefore, serving HTTP pages from an Onion
Service is more or less fine.
Prior to this patch, Tor Browser would mostly treat pages delivered
via Onion Services as well as pages delivered in the ordinary fashion
over the internet in the same way. This created some inconsistencies
in behaviour and misinformation presented to the user relating to the
security of pages delivered via Onion Services:
- HTTP Onion Service pages did not have any 'lock' icon indicating
the site was secure
- HTTP Onion Service pages would be marked as unencrypted in the Page
Info screen
- Mixed-mode content restrictions did not apply to HTTP Onion Service
pages embedding Non-Onion HTTP content
This patch fixes the above issues, and also adds several new 'Onion'
icons to the mix to indicate all of the various permutations of Onion
Services hosted HTTP or HTTPS pages with HTTP or HTTPS content.
Strings for Onion Service Page Info page are pulled from Torbutton's
localization strings.
---
browser/base/content/browser-siteIdentity.js | 39 ++++++++-----
browser/base/content/pageinfo/security.js | 64 ++++++++++++++++++----
.../shared/identity-block/identity-block.inc.css | 19 +++++++
dom/base/nsContentUtils.cpp | 19 +++++++
dom/base/nsContentUtils.h | 5 ++
dom/base/nsGlobalWindowOuter.cpp | 3 +-
dom/ipc/WindowGlobalActor.cpp | 4 +-
dom/ipc/WindowGlobalChild.cpp | 6 +-
dom/security/nsMixedContentBlocker.cpp | 16 +++++-
.../modules/geckoview/GeckoViewProgress.jsm | 4 ++
security/manager/ssl/nsSecureBrowserUI.cpp | 12 ++++
11 files changed, 160 insertions(+), 31 deletions(-)
diff --git a/browser/base/content/browser-siteIdentity.js b/browser/base/content/browser-siteIdentity.js
index acbcc79fb21e..6682ae8b096f 100644
--- a/browser/base/content/browser-siteIdentity.js
+++ b/browser/base/content/browser-siteIdentity.js
@@ -142,6 +142,10 @@ var gIdentityHandler = {
);
},
+ get _uriIsOnionHost() {
+ return this._uriHasHost ? this._uri.host.toLowerCase().endsWith(".onion") : false;
+ },
+
get _isAboutNetErrorPage() {
return (
gBrowser.selectedBrowser.documentURI &&
@@ -745,9 +749,9 @@ var gIdentityHandler = {
get pointerlockFsWarningClassName() {
// Note that the fullscreen warning does not handle _isSecureInternalUI.
if (this._uriHasHost && this._isSecureConnection) {
- return "verifiedDomain";
+ return this._uriIsOnionHost ? "onionVerifiedDomain" : "verifiedDomain";
}
- return "unknownIdentity";
+ return this._uriIsOnionHost ? "onionUnknownIdentity" : "unknownIdentity";
},
/**
@@ -755,6 +759,10 @@ var gIdentityHandler = {
* built-in (returns false) or imported (returns true).
*/
_hasCustomRoot() {
+ if (!this._secInfo) {
+ return false;
+ }
+
let issuerCert = null;
issuerCert = this._secInfo.succeededCertChain[
this._secInfo.succeededCertChain.length - 1
@@ -797,11 +805,13 @@ var gIdentityHandler = {
"identity.extension.label",
[extensionName]
);
- } else if (this._uriHasHost && this._isSecureConnection) {
+ } else if (this._uriHasHost && this._isSecureConnection && this._secInfo) {
// This is a secure connection.
- this._identityBox.className = "verifiedDomain";
+ // _isSecureConnection implicitly includes onion services, which may not have an SSL certificate
+ const uriIsOnionHost = this._uriIsOnionHost;
+ this._identityBox.className = uriIsOnionHost ? "onionVerifiedDomain" : "verifiedDomain";
if (this._isMixedActiveContentBlocked) {
- this._identityBox.classList.add("mixedActiveBlocked");
+ this._identityBox.classList.add(uriIsOnionHost ? "onionMixedActiveBlocked" : "mixedActiveBlocked");
}
if (!this._isCertUserOverridden) {
// It's a normal cert, verifier is the CA Org.
@@ -812,17 +822,17 @@ var gIdentityHandler = {
}
} else if (this._isBrokenConnection) {
// This is a secure connection, but something is wrong.
- this._identityBox.className = "unknownIdentity";
+ const uriIsOnionHost = this._uriIsOnionHost;
+ this._identityBox.className = uriIsOnionHost ? "onionUnknownIdentity" : "unknownIdentity";
if (this._isMixedActiveContentLoaded) {
- this._identityBox.classList.add("mixedActiveContent");
+ this._identityBox.classList.add(uriIsOnionHost ? "onionMixedActiveContent" : "mixedActiveContent");
} else if (this._isMixedActiveContentBlocked) {
- this._identityBox.classList.add(
- "mixedDisplayContentLoadedActiveBlocked"
- );
+ this._identityBox.classList.add(uriIsOnionHost ? "onionMixedDisplayContentLoadedActiveBlocked" : "mixedDisplayContentLoadedActiveBlocked");
} else if (this._isMixedPassiveContentLoaded) {
- this._identityBox.classList.add("mixedDisplayContent");
+ this._identityBox.classList.add(uriIsOnionHost ? "onionMixedDisplayContent" : "mixedDisplayContent");
} else {
+ // TODO: ignore weak https cipher for onionsites?
this._identityBox.classList.add("weakCipher");
}
} else if (this._isAboutCertErrorPage) {
@@ -835,8 +845,8 @@ var gIdentityHandler = {
// Network errors and blocked pages get a more neutral icon
this._identityBox.className = "unknownIdentity";
} else if (this._isPotentiallyTrustworthy) {
- // This is a local resource (and shouldn't be marked insecure).
- this._identityBox.className = "localResource";
+ // This is a local resource or an onion site (and shouldn't be marked insecure).
+ this._identityBox.className = this._uriIsOnionHost ? "onionUnknownIdentity" : "localResource";
} else {
// This is an insecure connection.
let warnOnInsecure =
@@ -860,7 +870,8 @@ var gIdentityHandler = {
}
if (this._isCertUserOverridden) {
- this._identityBox.classList.add("certUserOverridden");
+ const uriIsOnionHost = this._uriIsOnionHost;
+ this._identityBox.classList.add(uriIsOnionHost ? "onionCertUserOverridden" : "certUserOverridden");
// Cert is trusted because of a security exception, verifier is a special string.
tooltip = gNavigatorBundle.getString(
"identity.identified.verified_by_you"
diff --git a/browser/base/content/pageinfo/security.js b/browser/base/content/pageinfo/security.js
index 1222c8b0ec35..8d10c8df814c 100644
--- a/browser/base/content/pageinfo/security.js
+++ b/browser/base/content/pageinfo/security.js
@@ -22,6 +22,13 @@ ChromeUtils.defineModuleGetter(
"PluralForm",
"resource://gre/modules/PluralForm.jsm"
);
+XPCOMUtils.defineLazyGetter(
+ this,
+ "gTorButtonBundle",
+ function() {
+ return Services.strings.createBundle("chrome://torbutton/locale/torbutton.properties");
+ }
+);
var security = {
async init(uri, windowInfo) {
@@ -60,6 +67,11 @@ var security = {
(Ci.nsIWebProgressListener.STATE_LOADED_MIXED_ACTIVE_CONTENT |
Ci.nsIWebProgressListener.STATE_LOADED_MIXED_DISPLAY_CONTENT);
var isEV = ui.state & Ci.nsIWebProgressListener.STATE_IDENTITY_EV_TOPLEVEL;
+ var isOnion = false;
+ const hostName = this.windowInfo.hostName;
+ if (hostName && hostName.endsWith(".onion")) {
+ isOnion = true;
+ }
let retval = {
cAName: "",
@@ -69,6 +81,7 @@ var security = {
isBroken,
isMixed,
isEV,
+ isOnion,
cert: null,
certificateTransparency: null,
};
@@ -107,6 +120,7 @@ var security = {
isBroken,
isMixed,
isEV,
+ isOnion,
cert,
certChain: certChainArray,
certificateTransparency: undefined,
@@ -348,22 +362,50 @@ async function securityOnLoad(uri, windowInfo) {
}
msg2 = pkiBundle.getString("pageInfo_Privacy_None2");
} else if (info.encryptionStrength > 0) {
- hdr = pkiBundle.getFormattedString(
- "pageInfo_EncryptionWithBitsAndProtocol",
- [info.encryptionAlgorithm, info.encryptionStrength + "", info.version]
- );
+ if (!info.isOnion) {
+ hdr = pkiBundle.getFormattedString(
+ "pageInfo_EncryptionWithBitsAndProtocol",
+ [info.encryptionAlgorithm, info.encryptionStrength + "", info.version]
+ );
+ } else {
+ try {
+ hdr = gTorButtonBundle.formatStringFromName(
+ "pageInfo_OnionEncryptionWithBitsAndProtocol",
+ [info.encryptionAlgorithm, info.encryptionStrength + "", info.version]
+ );
+ } catch(err) {
+ hdr = "Connection Encrypted (Onion Service, "
+ + info.encryptionAlgorithm
+ + ", "
+ + info.encryptionStrength
+ + " bit keys, "
+ + info.version
+ + ")";
+ }
+ }
msg1 = pkiBundle.getString("pageInfo_Privacy_Encrypted1");
msg2 = pkiBundle.getString("pageInfo_Privacy_Encrypted2");
} else {
- hdr = pkiBundle.getString("pageInfo_NoEncryption");
- if (windowInfo.hostName != null) {
- msg1 = pkiBundle.getFormattedString("pageInfo_Privacy_None1", [
- windowInfo.hostName,
- ]);
+ if (!info.isOnion) {
+ hdr = pkiBundle.getString("pageInfo_NoEncryption");
+ if (windowInfo.hostName != null) {
+ msg1 = pkiBundle.getFormattedString("pageInfo_Privacy_None1", [
+ windowInfo.hostName,
+ ]);
+ } else {
+ msg1 = pkiBundle.getString("pageInfo_Privacy_None4");
+ }
+ msg2 = pkiBundle.getString("pageInfo_Privacy_None2");
} else {
- msg1 = pkiBundle.getString("pageInfo_Privacy_None4");
+ try {
+ hdr = gTorButtonBundle.GetStringFromName("pageInfo_OnionEncryption");
+ } catch (err) {
+ hdr = "Connection Encrypted (Onion Service)";
+ }
+
+ msg1 = pkiBundle.getString("pageInfo_Privacy_Encrypted1");
+ msg2 = pkiBundle.getString("pageInfo_Privacy_Encrypted2");
}
- msg2 = pkiBundle.getString("pageInfo_Privacy_None2");
}
setText("security-technical-shortform", hdr);
setText("security-technical-longform1", msg1);
diff --git a/browser/themes/shared/identity-block/identity-block.inc.css b/browser/themes/shared/identity-block/identity-block.inc.css
index a01e7d705cd7..68ed0beed684 100644
--- a/browser/themes/shared/identity-block/identity-block.inc.css
+++ b/browser/themes/shared/identity-block/identity-block.inc.css
@@ -203,6 +203,25 @@
list-style-image: url(chrome://global/skin/icons/security-broken.svg);
}
+#identity-box[pageproxystate="valid"].onionUnknownIdentity #identity-icon,
+#identity-box[pageproxystate="valid"].onionVerifiedDomain #identity-icon,
+#identity-box[pageproxystate="valid"].onionMixedActiveBlocked #identity-icon {
+ list-style-image: url(chrome://browser/skin/onion.svg);
+ visibility: visible;
+}
+
+#identity-box[pageproxystate="valid"].onionMixedDisplayContent #identity-icon,
+#identity-box[pageproxystate="valid"].onionMixedDisplayContentLoadedActiveBlocked #identity-icon,
+#identity-box[pageproxystate="valid"].onionCertUserOverridden #identity-icon {
+ list-style-image: url(chrome://browser/skin/onion-warning.svg);
+ visibility: visible;
+}
+
+#identity-box[pageproxystate="valid"].onionMixedActiveContent #identity-icon {
+ list-style-image: url(chrome://browser/skin/onion-slash.svg);
+ visibility: visible;
+}
+
#permissions-granted-icon {
list-style-image: url(chrome://browser/skin/permissions.svg);
}
diff --git a/dom/base/nsContentUtils.cpp b/dom/base/nsContentUtils.cpp
index 4cc0cd114ce5..b816f8b05067 100644
--- a/dom/base/nsContentUtils.cpp
+++ b/dom/base/nsContentUtils.cpp
@@ -9325,6 +9325,25 @@ bool nsContentUtils::ComputeIsSecureContext(nsIChannel* aChannel) {
return principal->GetIsOriginPotentiallyTrustworthy();
}
+/* static */ bool nsContentUtils::DocumentHasOnionURI(Document* aDocument) {
+ if (!aDocument) {
+ return false;
+ }
+
+ nsIURI* uri = aDocument->GetDocumentURI();
+ if (!uri) {
+ return false;
+ }
+
+ nsAutoCString host;
+ if (NS_SUCCEEDED(uri->GetHost(host))) {
+ bool hasOnionURI = StringEndsWith(host, ".onion"_ns);
+ return hasOnionURI;
+ }
+
+ return false;
+}
+
/* static */
void nsContentUtils::TryToUpgradeElement(Element* aElement) {
NodeInfo* nodeInfo = aElement->NodeInfo();
diff --git a/dom/base/nsContentUtils.h b/dom/base/nsContentUtils.h
index 94805199a8fd..4b6256fb9c2c 100644
--- a/dom/base/nsContentUtils.h
+++ b/dom/base/nsContentUtils.h
@@ -2999,6 +2999,11 @@ class nsContentUtils {
*/
static bool HttpsStateIsModern(Document* aDocument);
+ /**
+ * Returns true of the document's URI is a .onion
+ */
+ static bool DocumentHasOnionURI(Document* aDocument);
+
/**
* Returns true if the channel is for top-level window and is over secure
* context.
diff --git a/dom/base/nsGlobalWindowOuter.cpp b/dom/base/nsGlobalWindowOuter.cpp
index aab4a37e78a8..e981573e9822 100644
--- a/dom/base/nsGlobalWindowOuter.cpp
+++ b/dom/base/nsGlobalWindowOuter.cpp
@@ -1880,7 +1880,8 @@ bool nsGlobalWindowOuter::ComputeIsSecureContext(Document* aDocument,
return false;
}
- if (nsContentUtils::HttpsStateIsModern(aDocument)) {
+ if (nsContentUtils::HttpsStateIsModern(aDocument) ||
+ nsContentUtils::DocumentHasOnionURI(aDocument)) {
return true;
}
diff --git a/dom/ipc/WindowGlobalActor.cpp b/dom/ipc/WindowGlobalActor.cpp
index 8a3b49edd4d7..9975136e8e18 100644
--- a/dom/ipc/WindowGlobalActor.cpp
+++ b/dom/ipc/WindowGlobalActor.cpp
@@ -21,6 +21,7 @@
#include "mozilla/net/CookieJarSettings.h"
#include "mozilla/dom/WindowGlobalChild.h"
#include "mozilla/dom/WindowGlobalParent.h"
+#include "mozilla/dom/nsMixedContentBlocker.h"
#include "nsGlobalWindowInner.h"
#include "nsNetUtil.h"
@@ -131,7 +132,8 @@ WindowGlobalInit WindowGlobalActor::WindowInitializer(
// Init Mixed Content Fields
nsCOMPtr<nsIURI> innerDocURI = NS_GetInnermostURI(doc->GetDocumentURI());
- fields.mIsSecure = innerDocURI && innerDocURI->SchemeIs("https");
+ fields.mIsSecure = innerDocURI && (innerDocURI->SchemeIs("https") ||
+ nsMixedContentBlocker::IsPotentiallyTrustworthyOnion(innerDocURI));
nsCOMPtr<nsITransportSecurityInfo> securityInfo;
if (nsCOMPtr<nsIChannel> channel = doc->GetChannel()) {
diff --git a/dom/ipc/WindowGlobalChild.cpp b/dom/ipc/WindowGlobalChild.cpp
index 84c060c41534..73ac6a0cf96d 100644
--- a/dom/ipc/WindowGlobalChild.cpp
+++ b/dom/ipc/WindowGlobalChild.cpp
@@ -48,6 +48,8 @@
# include "GeckoProfiler.h"
#endif
+#include "mozilla/dom/nsMixedContentBlocker.h"
+
using namespace mozilla::ipc;
using namespace mozilla::dom::ipc;
@@ -234,7 +236,9 @@ void WindowGlobalChild::OnNewDocument(Document* aDocument) {
nsCOMPtr<nsIURI> innerDocURI =
NS_GetInnermostURI(aDocument->GetDocumentURI());
if (innerDocURI) {
- txn.SetIsSecure(innerDocURI->SchemeIs("https"));
+ txn.SetIsSecure(
+ innerDocURI->SchemeIs("https") ||
+ nsMixedContentBlocker::IsPotentiallyTrustworthyOnion(innerDocURI));
}
MOZ_DIAGNOSTIC_ASSERT(mDocumentPrincipal->GetIsLocalIpAddress() ==
diff --git a/dom/security/nsMixedContentBlocker.cpp b/dom/security/nsMixedContentBlocker.cpp
index 01c7877e020d..dab3f19bad40 100644
--- a/dom/security/nsMixedContentBlocker.cpp
+++ b/dom/security/nsMixedContentBlocker.cpp
@@ -634,8 +634,8 @@ nsresult nsMixedContentBlocker::ShouldLoad(bool aHadInsecureImageRedirect,
return NS_OK;
}
- // Check the parent scheme. If it is not an HTTPS page then mixed content
- // restrictions do not apply.
+ // Check the parent scheme. If it is not an HTTPS or .onion page then mixed
+ // content restrictions do not apply.
nsCOMPtr<nsIURI> innerRequestingLocation =
NS_GetInnermostURI(requestingLocation);
if (!innerRequestingLocation) {
@@ -650,6 +650,17 @@ nsresult nsMixedContentBlocker::ShouldLoad(bool aHadInsecureImageRedirect,
bool parentIsHttps = innerRequestingLocation->SchemeIs("https");
if (!parentIsHttps) {
+ bool parentIsOnion = IsPotentiallyTrustworthyOnion(innerRequestingLocation);
+ if (!parentIsOnion) {
+ *aDecision = ACCEPT;
+ return NS_OK;
+ }
+ }
+
+ bool isHttpScheme = innerContentLocation->SchemeIs("http");
+ // .onion URLs are encrypted and authenticated. Don't treat them as mixed
+ // content if potentially trustworthy (i.e. whitelisted).
+ if (isHttpScheme && IsPotentiallyTrustworthyOnion(innerContentLocation)) {
*aDecision = ACCEPT;
MOZ_LOG(sMCBLog, LogLevel::Verbose,
(" -> decision: Request will be allowed because the requesting "
@@ -676,7 +687,6 @@ nsresult nsMixedContentBlocker::ShouldLoad(bool aHadInsecureImageRedirect,
return NS_OK;
}
- bool isHttpScheme = innerContentLocation->SchemeIs("http");
if (isHttpScheme && IsPotentiallyTrustworthyOrigin(innerContentLocation)) {
*aDecision = ACCEPT;
return NS_OK;
diff --git a/mobile/android/modules/geckoview/GeckoViewProgress.jsm b/mobile/android/modules/geckoview/GeckoViewProgress.jsm
index 17069dbe657f..c1346b1858cf 100644
--- a/mobile/android/modules/geckoview/GeckoViewProgress.jsm
+++ b/mobile/android/modules/geckoview/GeckoViewProgress.jsm
@@ -145,6 +145,10 @@ var IdentityHandler = {
result.host = uri.host;
}
+ if (!aBrowser.securityUI.secInfo) {
+ return result;
+ }
+
const cert = aBrowser.securityUI.secInfo.serverCert;
result.certificate = aBrowser.securityUI.secInfo.serverCert.getBase64DERString();
diff --git a/security/manager/ssl/nsSecureBrowserUI.cpp b/security/manager/ssl/nsSecureBrowserUI.cpp
index b4de1a331ffc..f1ce39582854 100644
--- a/security/manager/ssl/nsSecureBrowserUI.cpp
+++ b/security/manager/ssl/nsSecureBrowserUI.cpp
@@ -9,6 +9,7 @@
#include "mozilla/Logging.h"
#include "mozilla/Unused.h"
#include "mozilla/dom/Document.h"
+#include "mozilla/dom/nsMixedContentBlocker.h"
#include "nsContentUtils.h"
#include "nsIChannel.h"
#include "nsDocShell.h"
@@ -85,6 +86,17 @@ void nsSecureBrowserUI::RecomputeSecurityFlags() {
}
}
}
+
+ // any protocol routed over tor is secure
+ if (!(mState & nsIWebProgressListener::STATE_IS_SECURE)) {
+ nsCOMPtr<nsIURI> innerDocURI = NS_GetInnermostURI(win->GetDocumentURI());
+ if (innerDocURI &&
+ nsMixedContentBlocker::IsPotentiallyTrustworthyOnion(innerDocURI)) {
+ MOZ_LOG(gSecureBrowserUILog, LogLevel::Debug, (" is onion"));
+ mState = (mState & ~nsIWebProgressListener::STATE_IS_INSECURE) |
+ nsIWebProgressListener::STATE_IS_SECURE;
+ }
+ }
}
// Add upgraded-state flags when request has been
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