[tbb-commits] [tor-browser/tor-browser-91.5.0esr-11.5-2] 40209: Implement Basic Crypto Safety
richard at torproject.org
richard at torproject.org
Tue Feb 1 13:45:17 UTC 2022
commit fde945b87f4191e13b1400993dee98d6cbed5eb8
Author: sanketh <me at snkth.com>
Date: Mon Feb 8 20:12:44 2021 -0500
40209: Implement Basic Crypto Safety
Adds a CryptoSafety actor which detects when you've copied a crypto
address from a HTTP webpage and shows a warning.
Closes #40209.
Bug 40428: Fix string attribute names
---
browser/actors/CryptoSafetyChild.jsm | 87 ++++++++++++++++
browser/actors/CryptoSafetyParent.jsm | 142 +++++++++++++++++++++++++++
browser/actors/moz.build | 2 +
browser/base/content/popup-notifications.inc | 14 +++
browser/components/BrowserGlue.jsm | 18 ++++
browser/modules/TorStrings.jsm | 48 +++++++++
browser/themes/shared/browser.inc.css | 5 +
toolkit/content/license.html | 32 ++++++
toolkit/modules/Bech32Decode.jsm | 103 +++++++++++++++++++
toolkit/modules/moz.build | 1 +
10 files changed, 452 insertions(+)
diff --git a/browser/actors/CryptoSafetyChild.jsm b/browser/actors/CryptoSafetyChild.jsm
new file mode 100644
index 000000000000..87ff261d4915
--- /dev/null
+++ b/browser/actors/CryptoSafetyChild.jsm
@@ -0,0 +1,87 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* Copyright (c) 2020, The Tor Project, Inc.
+ *
+ * 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/. */
+
+var EXPORTED_SYMBOLS = ["CryptoSafetyChild"];
+
+const { Bech32Decode } = ChromeUtils.import(
+ "resource://gre/modules/Bech32Decode.jsm"
+);
+
+const { XPCOMUtils } = ChromeUtils.import(
+ "resource://gre/modules/XPCOMUtils.jsm"
+);
+
+const kPrefCryptoSafety = "security.cryptoSafety";
+
+XPCOMUtils.defineLazyPreferenceGetter(
+ this,
+ "isCryptoSafetyEnabled",
+ kPrefCryptoSafety,
+ true /* defaults to true */
+);
+
+function looksLikeCryptoAddress(s) {
+ // P2PKH and P2SH addresses
+ // https://stackoverflow.com/a/24205650
+ const bitcoinAddr = /^[13][a-km-zA-HJ-NP-Z1-9]{25,39}$/;
+ if (bitcoinAddr.test(s)) {
+ return true;
+ }
+
+ // Bech32 addresses
+ if (Bech32Decode(s) !== null) {
+ return true;
+ }
+
+ // regular addresses
+ const etherAddr = /^0x[a-fA-F0-9]{40}$/;
+ if (etherAddr.test(s)) {
+ return true;
+ }
+
+ // t-addresses
+ // https://www.reddit.com/r/zec/comments/8mxj6x/simple_regex_to_validate_a_zcash_tz_address/dzr62p5/
+ const zcashAddr = /^t1[a-zA-Z0-9]{33}$/;
+ if (zcashAddr.test(s)) {
+ return true;
+ }
+
+ // Standard, Integrated, and 256-bit Integrated addresses
+ // https://monero.stackexchange.com/a/10627
+ const moneroAddr = /^4(?:[0-9AB]|[1-9A-HJ-NP-Za-km-z]{12}(?:[1-9A-HJ-NP-Za-km-z]{30})?)[1-9A-HJ-NP-Za-km-z]{93}$/;
+ if (moneroAddr.test(s)) {
+ return true;
+ }
+
+ return false;
+}
+
+class CryptoSafetyChild extends JSWindowActorChild {
+ handleEvent(event) {
+ if (isCryptoSafetyEnabled) {
+ // Ignore non-HTTP addresses
+ if (!this.document.documentURIObject.schemeIs("http")) {
+ return;
+ }
+ // Ignore onion addresses
+ if (this.document.documentURIObject.host.endsWith(".onion")) {
+ return;
+ }
+
+ if (event.type == "copy" || event.type == "cut") {
+ this.contentWindow.navigator.clipboard.readText().then(clipText => {
+ const selection = clipText.trim();
+ if (looksLikeCryptoAddress(selection)) {
+ this.sendAsyncMessage("CryptoSafety:CopiedText", {
+ selection,
+ });
+ }
+ });
+ }
+ }
+ }
+}
diff --git a/browser/actors/CryptoSafetyParent.jsm b/browser/actors/CryptoSafetyParent.jsm
new file mode 100644
index 000000000000..bac151df5511
--- /dev/null
+++ b/browser/actors/CryptoSafetyParent.jsm
@@ -0,0 +1,142 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* Copyright (c) 2020, The Tor Project, Inc.
+ *
+ * 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/. */
+
+var EXPORTED_SYMBOLS = ["CryptoSafetyParent"];
+
+const { XPCOMUtils } = ChromeUtils.import(
+ "resource://gre/modules/XPCOMUtils.jsm"
+);
+
+XPCOMUtils.defineLazyModuleGetters(this, {
+ TorStrings: "resource:///modules/TorStrings.jsm",
+});
+
+const kPrefCryptoSafety = "security.cryptoSafety";
+
+XPCOMUtils.defineLazyPreferenceGetter(
+ this,
+ "isCryptoSafetyEnabled",
+ kPrefCryptoSafety,
+ true /* defaults to true */
+);
+
+class CryptoSafetyParent extends JSWindowActorParent {
+ getBrowser() {
+ return this.browsingContext.top.embedderElement;
+ }
+
+ receiveMessage(aMessage) {
+ if (isCryptoSafetyEnabled) {
+ if (aMessage.name == "CryptoSafety:CopiedText") {
+ showPopup(this.getBrowser(), aMessage.data.selection);
+ }
+ }
+ }
+}
+
+function trimAddress(cryptoAddr) {
+ if (cryptoAddr.length <= 32) {
+ return cryptoAddr;
+ }
+ return cryptoAddr.substring(0, 32) + "...";
+}
+
+function showPopup(aBrowser, cryptoAddr) {
+ const chromeDoc = aBrowser.ownerDocument;
+ if (chromeDoc) {
+ const win = chromeDoc.defaultView;
+ const cryptoSafetyPrompt = new CryptoSafetyPrompt(
+ aBrowser,
+ win,
+ cryptoAddr
+ );
+ cryptoSafetyPrompt.show();
+ }
+}
+
+class CryptoSafetyPrompt {
+ constructor(aBrowser, aWin, cryptoAddr) {
+ this._browser = aBrowser;
+ this._win = aWin;
+ this._cryptoAddr = cryptoAddr;
+ }
+
+ show() {
+ const primaryAction = {
+ label: TorStrings.cryptoSafetyPrompt.primaryAction,
+ accessKey: TorStrings.cryptoSafetyPrompt.primaryActionAccessKey,
+ callback: () => {
+ this._win.torbutton_new_circuit();
+ },
+ };
+
+ const secondaryAction = {
+ label: TorStrings.cryptoSafetyPrompt.secondaryAction,
+ accessKey: TorStrings.cryptoSafetyPrompt.secondaryActionAccessKey,
+ callback: () => {},
+ };
+
+ let _this = this;
+ const options = {
+ popupIconURL: "chrome://browser/skin/cert-error.svg",
+ eventCallback(aTopic) {
+ if (aTopic === "showing") {
+ _this._onPromptShowing();
+ }
+ },
+ };
+
+ const cryptoWarningText = TorStrings.cryptoSafetyPrompt.cryptoWarning.replace(
+ "%S",
+ trimAddress(this._cryptoAddr)
+ );
+
+ if (this._win.PopupNotifications) {
+ this._prompt = this._win.PopupNotifications.show(
+ this._browser,
+ "crypto-safety-warning",
+ cryptoWarningText,
+ null /* anchor ID */,
+ primaryAction,
+ [secondaryAction],
+ options
+ );
+ }
+ }
+
+ _onPromptShowing() {
+ let xulDoc = this._browser.ownerDocument;
+
+ let whatCanHeading = xulDoc.getElementById(
+ "crypto-safety-warning-notification-what-can-heading"
+ );
+ if (whatCanHeading) {
+ whatCanHeading.textContent = TorStrings.cryptoSafetyPrompt.whatCanHeading;
+ }
+
+ let whatCanBody = xulDoc.getElementById(
+ "crypto-safety-warning-notification-what-can-body"
+ );
+ if (whatCanBody) {
+ whatCanBody.textContent = TorStrings.cryptoSafetyPrompt.whatCanBody;
+ }
+
+ let learnMoreElem = xulDoc.getElementById(
+ "crypto-safety-warning-notification-learnmore"
+ );
+ if (learnMoreElem) {
+ learnMoreElem.setAttribute(
+ "value",
+ TorStrings.cryptoSafetyPrompt.learnMore
+ );
+ learnMoreElem.setAttribute(
+ "href",
+ TorStrings.cryptoSafetyPrompt.learnMoreURL
+ );
+ }
+ }
+}
diff --git a/browser/actors/moz.build b/browser/actors/moz.build
index 28c981625a7f..48e3dde6b832 100644
--- a/browser/actors/moz.build
+++ b/browser/actors/moz.build
@@ -56,6 +56,8 @@ FINAL_TARGET_FILES.actors += [
"ContentSearchParent.jsm",
"ContextMenuChild.jsm",
"ContextMenuParent.jsm",
+ "CryptoSafetyChild.jsm",
+ "CryptoSafetyParent.jsm",
"DecoderDoctorChild.jsm",
"DecoderDoctorParent.jsm",
"DOMFullscreenChild.jsm",
diff --git a/browser/base/content/popup-notifications.inc b/browser/base/content/popup-notifications.inc
index 6adfde017b9e..8f6d28cc81b2 100644
--- a/browser/base/content/popup-notifications.inc
+++ b/browser/base/content/popup-notifications.inc
@@ -162,3 +162,17 @@
</vbox>
</popupnotificationfooter>
</popupnotification>
+
+ <popupnotification id="crypto-safety-warning-notification" hidden="true">
+ <popupnotificationcontent orient="vertical">
+ <description id="crypto-safety-warning-notification-desc"/>
+ <html:div id="crypto-safety-warning-notification-what-can">
+ <html:strong id="crypto-safety-warning-notification-what-can-heading" />
+ <html:br/>
+ <html:span id="crypto-safety-warning-notification-what-can-body" />
+ </html:div>
+ <label id="crypto-safety-warning-notification-learnmore"
+ class="popup-notification-learnmore-link"
+ is="text-link"/>
+ </popupnotificationcontent>
+ </popupnotification>
diff --git a/browser/components/BrowserGlue.jsm b/browser/components/BrowserGlue.jsm
index 0386e4159eeb..0e0138fe2fd9 100644
--- a/browser/components/BrowserGlue.jsm
+++ b/browser/components/BrowserGlue.jsm
@@ -432,6 +432,24 @@ let JSWINDOWACTORS = {
},
messageManagerGroups: ["browsers"],
+
+ allFrames: true,
+ },
+
+ CryptoSafety: {
+ parent: {
+ moduleURI: "resource:///actors/CryptoSafetyParent.jsm",
+ },
+
+ child: {
+ moduleURI: "resource:///actors/CryptoSafetyChild.jsm",
+ group: "browsers",
+ events: {
+ copy: { mozSystemGroup: true },
+ cut: { mozSystemGroup: true },
+ },
+ },
+
allFrames: true,
},
diff --git a/browser/modules/TorStrings.jsm b/browser/modules/TorStrings.jsm
index e8a8d37ae373..1e08b168e4af 100644
--- a/browser/modules/TorStrings.jsm
+++ b/browser/modules/TorStrings.jsm
@@ -101,6 +101,54 @@ class TorPropertyStringBundle {
Security Level Strings
*/
var TorStrings = {
+ /*
+ CryptoSafetyPrompt Strings
+ */
+ cryptoSafetyPrompt: (function() {
+ let tsb = new TorPropertyStringBundle(
+ "chrome://torbutton/locale/torbutton.properties",
+ "cryptoSafetyPrompt."
+ );
+ let getString = function(key, fallback) {
+ return tsb.getString(key, fallback);
+ };
+
+ let retval = {
+ cryptoWarning: getString(
+ "cryptoWarning",
+ "A cryptocurrency address (%S) has been copied from an insecure website. It could have been modified."
+ ),
+ whatCanHeading: getString(
+ "whatCanHeading",
+ "What can you do about it?"
+ ),
+ whatCanBody: getString(
+ "whatCanBody",
+ "You can try reconnecting with a new circuit to establish a secure connection, or accept the risk and dismiss this warning."
+ ),
+ learnMore: getString("learnMore", "Learn more"),
+ learnMoreURL: `https://support.torproject.org/${getLocale()}/`,
+ primaryAction: getString(
+ "primaryAction",
+ "Reload Tab with a New Circuit"
+ ),
+ primaryActionAccessKey: getString(
+ "primaryActionAccessKey",
+ "R"
+ ),
+ secondaryAction: getString(
+ "secondaryAction",
+ "Dismiss Warning"
+ ),
+ secondaryActionAccessKey: getString(
+ "secondaryActionAccessKey",
+ "D"
+ ),
+ };
+
+ return retval;
+ })() /* CryptoSafetyPrompt Strings */,
+
/*
Tor Browser Security Level Strings
*/
diff --git a/browser/themes/shared/browser.inc.css b/browser/themes/shared/browser.inc.css
index 2eeefda472d6..e70aeab1c761 100644
--- a/browser/themes/shared/browser.inc.css
+++ b/browser/themes/shared/browser.inc.css
@@ -828,3 +828,8 @@ popupnotificationcontent {
#tab-notification-deck {
display: block;
}
+
+#crypto-safety-warning-notification-what-can {
+ display: block;
+ margin: 5px;
+}
diff --git a/toolkit/content/license.html b/toolkit/content/license.html
index d26dc7118d3c..782e874edf2a 100644
--- a/toolkit/content/license.html
+++ b/toolkit/content/license.html
@@ -70,6 +70,7 @@
<li><a href="about:license#arm">ARM License</a></li>
<li><a href="about:license#babel">Babel License</a></li>
<li><a href="about:license#babylon">Babylon License</a></li>
+ <li><a href="about:license#bech32">Bech32 License</a></li>
<li><a href="about:license#bincode">bincode License</a></li>
<li><a href="about:license#bsd2clause">BSD 2-Clause License</a></li>
<li><a href="about:license#bsd3clause">BSD 3-Clause License</a></li>
@@ -2105,6 +2106,37 @@ furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+</pre>
+
+
+ <hr>
+
+ <h1><a id="bech32"></a>Bech32 License</h1>
+
+ <p>This license applies to the file
+ <code>toolkit/modules/Bech32Decode.jsm</code>.
+ </p>
+
+<pre>
+Copyright (c) 2017 Pieter Wuille
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
diff --git a/toolkit/modules/Bech32Decode.jsm b/toolkit/modules/Bech32Decode.jsm
new file mode 100644
index 000000000000..3a2bc7ae0a10
--- /dev/null
+++ b/toolkit/modules/Bech32Decode.jsm
@@ -0,0 +1,103 @@
+// Adapted from the reference implementation of Bech32
+// https://github.com/sipa/bech32
+
+// Copyright (c) 2017 Pieter Wuille
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+"use strict";
+
+/**
+ * JS module implementation of Bech32 decoding adapted from the reference
+ * implementation https://github.com/sipa/bech32.
+ */
+
+var EXPORTED_SYMBOLS = ["Bech32Decode"];
+
+var CHARSET = "qpzry9x8gf2tvdw0s3jn54khce6mua7l";
+var GENERATOR = [0x3b6a57b2, 0x26508e6d, 0x1ea119fa, 0x3d4233dd, 0x2a1462b3];
+
+function polymod(values) {
+ var chk = 1;
+ for (var p = 0; p < values.length; ++p) {
+ var top = chk >> 25;
+ chk = ((chk & 0x1ffffff) << 5) ^ values[p];
+ for (var i = 0; i < 5; ++i) {
+ if ((top >> i) & 1) {
+ chk ^= GENERATOR[i];
+ }
+ }
+ }
+ return chk;
+}
+
+function hrpExpand(hrp) {
+ var ret = [];
+ var p;
+ for (p = 0; p < hrp.length; ++p) {
+ ret.push(hrp.charCodeAt(p) >> 5);
+ }
+ ret.push(0);
+ for (p = 0; p < hrp.length; ++p) {
+ ret.push(hrp.charCodeAt(p) & 31);
+ }
+ return ret;
+}
+
+function verifyChecksum(hrp, data) {
+ return polymod(hrpExpand(hrp).concat(data)) === 1;
+}
+
+function Bech32Decode(bechString) {
+ var p;
+ var has_lower = false;
+ var has_upper = false;
+ for (p = 0; p < bechString.length; ++p) {
+ if (bechString.charCodeAt(p) < 33 || bechString.charCodeAt(p) > 126) {
+ return null;
+ }
+ if (bechString.charCodeAt(p) >= 97 && bechString.charCodeAt(p) <= 122) {
+ has_lower = true;
+ }
+ if (bechString.charCodeAt(p) >= 65 && bechString.charCodeAt(p) <= 90) {
+ has_upper = true;
+ }
+ }
+ if (has_lower && has_upper) {
+ return null;
+ }
+ bechString = bechString.toLowerCase();
+ var pos = bechString.lastIndexOf("1");
+ if (pos < 1 || pos + 7 > bechString.length || bechString.length > 90) {
+ return null;
+ }
+ var hrp = bechString.substring(0, pos);
+ var data = [];
+ for (p = pos + 1; p < bechString.length; ++p) {
+ var d = CHARSET.indexOf(bechString.charAt(p));
+ if (d === -1) {
+ return null;
+ }
+ data.push(d);
+ }
+ if (!verifyChecksum(hrp, data)) {
+ return null;
+ }
+ return { hrp: hrp, data: data.slice(0, data.length - 6) };
+}
diff --git a/toolkit/modules/moz.build b/toolkit/modules/moz.build
index 9d349d9f3394..a3bfdf83ffbd 100644
--- a/toolkit/modules/moz.build
+++ b/toolkit/modules/moz.build
@@ -152,6 +152,7 @@ EXTRA_JS_MODULES += [
"ActorManagerParent.jsm",
"AppMenuNotifications.jsm",
"AsyncPrefs.jsm",
+ "Bech32Decode.jsm",
"BinarySearch.jsm",
"BrowserTelemetryUtils.jsm",
"BrowserUtils.jsm",
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