Use all the possible values for a unicode mapping

README.md

@@ -24,6 +24,14 @@ The easiest is to simply type on a page as normal. This method breaks the least
 
 You can whitelist sites by using the button in the addon's popup or by manually adding them on the addon settings page.
 
+## Unicode Conversion
+
+There is a default disabled setting to convert ascii to look-alike unicode characters.
+
+This doesn't do a lot, but it makes it a bit harder to do 'sentiment-analysis' and breaks typical text search.
+
+This can also circumvent naive profanity filters.
+
 ## Toolbar input
 
 You can also enter text into the textarea in the toolbar button which will be instantly transfered to the page. This method allows you to type without lag, but it breaks on many websites and can still be tracked if a website is checking input changes as opposed to key events.

manifest.json

@@ -2,7 +2,7 @@
 
   "manifest_version": 2,
   "name": "Private Keyboard",
-  "version": "2.0",
+  "version": "2.1",
 
 
   "description": "Protect against keyboard biometrics",

settings/button.html

@@ -4,6 +4,7 @@
         <meta charset="utf-8">
         <title>Private Keyboard</title>
         <link rel="stylesheet" href="./button.css">
+        <script src="./unicodemapping.js"></script>
         <script src="./button.js" defer></script>
         <script src="./keybuffer2.js" defer></script>
     </head>

settings/keybuffer2.js

@@ -1,5 +1,18 @@
 let started = false
 
+useUnicode = false
+
+let usingUnicode = function(result){
+  console.debug(result)
+  if (result['keyboardprivacyunicode']){
+    useUnicode = true
+  }
+}
+
+
+let doUnicode = browser.storage.sync.get("keyboardprivacyunicode");
+doUnicode.then(usingUnicode, onError);
+
 function onError(error) {
     console.error(`Error: ${error}`);
   }
@@ -35,7 +48,12 @@ let sender = async function(e){
   }
 
     let sendMessageToTabs = function(tabs){
-        doSendMsg(document.getElementById('keyBuffer').value, tabs)
+      let val = document.getElementById('keyBuffer').value
+      if (useUnicode){
+        val = getUnicode(val)
+      }
+
+      doSendMsg(val, tabs)
     }
 
     browser.tabs.query({
@@ -73,4 +91,4 @@ getCurrent()
 document.getElementById("keyBuffer").focus()
 
 document.getElementById('keyBuffer').onkeydown = sender
-document.getElementById('keyBuffer').onpaste = sender
+document.getElementById('keyBuffer').onpaste = sender

settings/options.html

@@ -12,6 +12,9 @@
         <input type="checkbox" id="usePrompt">
         <label for="usePrompt">Use prompt() dialogs on single-line inputs. Faster typing and less CPU usage, but can break some websites and features like autocomplete.</label>
         <br>
+        <input type="checkbox" id="useUnicode">
+        <label for="useUnicode">Convert english to unicode (will break a lot)</label>
+        <br>
         <input type="checkbox" id="whitelistLAN">
         <label for="whitelistLAN">Whitelist private IP + localhost range hostnames (e.g. routers)</label>
         <h1>Trusted domains (comma delimited)</h1>

settings/options.js

@@ -27,6 +27,9 @@ function saveOptions(e) {
     browser.storage.sync.set({
       keyboardprivacyprompt: document.querySelector("#usePrompt").checked
     })
+    browser.storage.sync.set({
+      keyboardprivacyunicode: document.querySelector("#useUnicode").checked
+    })
     document.getElementById('saved').innerHTML = '<br><b>Saved</b>'
     setTimeout(function(){
       document.getElementById('saved').innerHTML = '<br>'
@@ -49,6 +52,10 @@ function saveOptions(e) {
       document.querySelector("#usePrompt").checked = result['keyboardprivacyprompt']
     }
 
+    function setCurrentUnicode(result){
+      document.querySelector("#useUnicode").checked = result['keyboardprivacyunicode']
+    }
+
     function onError(error) {
       console.log(`Error: ${error}`);
     }
@@ -61,6 +68,9 @@ function saveOptions(e) {
 
     let gettingPrompt = browser.storage.sync.get("keyboardprivacyprompt");
     gettingPrompt.then(setCurrentPrompt, onError);
+
+    let gettingUnicode = browser.storage.sync.get("keyboardprivacyunicode");
+    gettingUnicode.then(setCurrentUnicode, onError);
   }
 
   document.addEventListener("DOMContentLoaded", restoreOptions);

settings/unicodemapping.js

@@ -0,0 +1,123 @@
+let randNum = function(minValue, maxValue){
+    let buf = new Uint8Array(1)
+    while (true){
+      window.crypto.getRandomValues(buf);
+
+      if (buf[0] <= maxValue && buf[0] >= minValue){
+        break;
+      }
+      buf = new Uint8Array(1);
+    }
+    return buf[0];
+  }
+
+let getUnicode = function(input){
+    const uc =
+        {
+            "a": [
+                "\u0430",
+                "\u00e0",
+                "\u00e1",
+                "\u1ea1",
+                "\u0105"
+            ],
+            "c": [
+                "\u0441",
+                "\u0188",
+                "\u010b"
+            ],
+            "d": [
+                "\u0501",
+                "\u0257"
+            ],
+            "e": [
+                "\u0435",
+                "\u1eb9",
+                "\u0117",
+                "\u0117",
+                "\u00e9",
+                "\u00e8"
+            ],
+            "g": [
+                "\u0121"
+            ],
+            "h": [
+                "\u04bb"
+            ],
+            "i": [
+                "\u0456",
+                "\u00ed",
+                "\u00ec",
+                "\u00ef"
+            ],
+            "j": [
+                "\u0458",
+                "\u029d"
+            ],
+            "k": [
+                "\u03ba"
+            ],
+            "l": [
+                "\u04cf",
+                "\u1e37"
+            ],
+            "n": [
+                "\u0578"
+            ],
+            "o": [
+                "\u043e",
+                "\u03bf",
+                "\u0585",
+                "\u022f",
+                "\u1ecd",
+                "\u1ecf",
+                "\u01a1",
+                "\u00f6",
+                "\u00f3",
+                "\u00f2"
+            ],
+            "p": [
+                "\u0440"
+            ],
+            "q": [
+                "\u0566"
+            ],
+            "s": [
+                "\u0282"
+            ],
+            "u": [
+                "\u03c5",
+                "\u057d",
+                "\u00fc",
+                "\u00fa",
+                "\u00f9"
+            ],
+            "v": [
+                "\u03bd",
+                "\u0475"
+            ],
+            "x": [
+                "\u0445",
+                "\u04b3"
+            ],
+            "y": [
+                "\u0443",
+                "\u00fd"
+            ],
+            "z": [
+                "\u0290",
+                "\u017c"
+            ]
+        }
+        let output = ''
+
+        input.split("").forEach(element => {
+            if (uc[element] === undefined){
+                output += element
+            }
+            else{
+                output += uc[element][randNum(0, uc[element].length - 1)]
+            }
+        })
+        return output
+    }