commit 41648b040580412b79525f70814d5ad6fd4e7d17 Author: sanketh me@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. --- 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 | 17 ++++ 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, 451 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_zcas... + 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 e70f0f09fe3a..9eb5ca397060 100644 --- a/browser/actors/moz.build +++ b/browser/actors/moz.build @@ -50,6 +50,8 @@ FINAL_TARGET_FILES.actors += [ 'ContentSearchParent.jsm', 'ContextMenuChild.jsm', 'ContextMenuParent.jsm', + 'CryptoSafetyChild.jsm', + 'CryptoSafetyParent.jsm', 'DOMFullscreenChild.jsm', 'DOMFullscreenParent.jsm', 'FormValidationChild.jsm', diff --git a/browser/base/content/popup-notifications.inc b/browser/base/content/popup-notifications.inc index 42e17e90c648..ff6f8cdeca80 100644 --- a/browser/base/content/popup-notifications.inc +++ b/browser/base/content/popup-notifications.inc @@ -114,3 +114,17 @@ </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 3750230a250b..5f708fca3d5c 100644 --- a/browser/components/BrowserGlue.jsm +++ b/browser/components/BrowserGlue.jsm @@ -297,6 +297,23 @@ let JSWINDOWACTORS = { 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, + }, + DOMFullscreen: { parent: { moduleURI: "resource:///actors/DOMFullscreenParent.jsm", diff --git a/browser/modules/TorStrings.jsm b/browser/modules/TorStrings.jsm index e8a8d37ae373..bf522234d588 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( + "cryptoSafetyPrompt.cryptoWarning", + "A cryptocurrency address (%S) has been copied from an insecure website. It could have been modified." + ), + whatCanHeading: getString( + "cryptoSafetyPrompt.whatCanHeading", + "What can you do about it?" + ), + whatCanBody: getString( + "cryptoSafetyPrompt.whatCanBody", + "You can try reconnecting with a new circuit to establish a secure connection, or accept the risk and dismiss this warning." + ), + learnMore: getString("cryptoSafetyPrompt.learnMore", "Learn more"), + learnMoreURL: `https://support.torproject.org/$%7BgetLocale()%7D/%60, + primaryAction: getString( + "cryptoSafetyPrompt.primaryAction", + "Reload Tab with a New Circuit" + ), + primaryActionAccessKey: getString( + "cryptoSafetyPrompt.primaryActionAccessKey", + "R" + ), + secondaryAction: getString( + "cryptoSafetyPrompt.secondaryAction", + "Dismiss Warning" + ), + secondaryActionAccessKey: getString( + "cryptoSafetyPrompt.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 0113466e8e56..4ef27d880754 100644 --- a/browser/themes/shared/browser.inc.css +++ b/browser/themes/shared/browser.inc.css @@ -620,3 +620,8 @@ menupopup::part(drop-indicator) { #sharing-warning-proceed-to-tab:hover { background-color: rgb(0,62,170); } + +#crypto-safety-warning-notification-what-can { + display: block; + margin: 5px; +} diff --git a/toolkit/content/license.html b/toolkit/content/license.html index e44c31ec6d4e..90995236b41b 100644 --- a/toolkit/content/license.html +++ b/toolkit/content/license.html @@ -72,6 +72,7 @@ <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> @@ -2795,6 +2796,37 @@ 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 e1f1eb5759c5..698d2773a7ed 100644 --- a/toolkit/modules/moz.build +++ b/toolkit/modules/moz.build @@ -160,6 +160,7 @@ EXTRA_JS_MODULES += [ 'ActorManagerParent.jsm', 'AppMenuNotifications.jsm', 'AsyncPrefs.jsm', + 'Bech32Decode.jsm', 'BinarySearch.jsm', 'BrowserUtils.jsm', 'CanonicalJSON.jsm',