X-Git-Url: https://git.immae.eu/?a=blobdiff_plain;f=src%2Fjs%2Findex.js;h=89f8d0dd006053d7f86233f74d313fce00127680;hb=02f05d3e467ba8ccf3fca2811eda847fc71e511f;hp=66585a95993a64aff9921657588f8b566e2ebd4f;hpb=3599674db4855614d9123f2f80dcf0a37c34eb79;p=perso%2FImmae%2FProjets%2FCryptomonnaies%2FBIP39.git

diff --git a/src/js/index.js b/src/js/index.js
index 66585a9..89f8d0d 100644
--- a/src/js/index.js
+++ b/src/js/index.js
@@ -24,14 +24,15 @@
     DOM.useEntropy = $(".use-entropy");
     DOM.entropyContainer = $(".entropy-container");
     DOM.entropy = $(".entropy");
-    DOM.entropyFeedback = $(".entropy-feedback");
-    DOM.entropyFiltered = DOM.entropyFeedback.find(".filtered");
-    DOM.entropyType = DOM.entropyFeedback.find(".type");
-    DOM.entropyStrength = DOM.entropyFeedback.find(".strength");
-    DOM.entropyEventCount = DOM.entropyFeedback.find(".event-count");
-    DOM.entropyBits = DOM.entropyFeedback.find(".bits");
-    DOM.entropyBitsPerEvent = DOM.entropyFeedback.find(".bits-per-event");
-    DOM.entropyMnemonicLength = DOM.entropyFeedback.find(".mnemonic-length");
+    DOM.entropyFiltered = DOM.entropyContainer.find(".filtered");
+    DOM.entropyType = DOM.entropyContainer.find(".type");
+    DOM.entropyStrength = DOM.entropyContainer.find(".strength");
+    DOM.entropyEventCount = DOM.entropyContainer.find(".event-count");
+    DOM.entropyBits = DOM.entropyContainer.find(".bits");
+    DOM.entropyBitsPerEvent = DOM.entropyContainer.find(".bits-per-event");
+    DOM.entropyWordCount = DOM.entropyContainer.find(".word-count");
+    DOM.entropyBinary = DOM.entropyContainer.find(".binary");
+    DOM.entropyMnemonicLength = DOM.entropyContainer.find(".mnemonic-length");
     DOM.phrase = $(".phrase");
     DOM.passphrase = $(".passphrase");
     DOM.generateContainer = $(".generate-container");
@@ -161,7 +162,7 @@
         // If blank entropy, clear mnemonic, addresses, errors
         if (DOM.entropy.val().trim().length == 0) {
             clearDisplay();
-            hideEntropyFeedback();
+            clearEntropyFeedback();
             DOM.phrase.val("");
             showValidationError("Blank entropy");
             return;
@@ -735,7 +736,7 @@
     }
 
     function setMnemonicFromEntropy() {
-        hideEntropyFeedback();
+        clearEntropyFeedback();
         // Get entropy value
         var entropyStr = DOM.entropy.val();
         // Work out minimum base for entropy
@@ -763,7 +764,8 @@
         }
         // Discard trailing entropy
         var bitsToUse = Math.floor(bits.length / 32) * 32;
-        var binaryStr = bits.substring(0, bitsToUse);
+        var start = bits.length - bitsToUse;
+        var binaryStr = bits.substring(start);
         // Convert entropy string to numeric array
         var entropyArr = [];
         for (var i=0; i<binaryStr.length / 8; i++) {
@@ -777,14 +779,15 @@
         DOM.phrase.val(phrase);
     }
 
-    function hideEntropyFeedback() {
-        DOM.entropyFeedback.addClass("hidden");
-        DOM.entropyFiltered.text("");
+    function clearEntropyFeedback() {
+        DOM.entropyStrength.text("...");
         DOM.entropyType.text("");
-        DOM.entropyStrength.text("");
-        DOM.entropyEventCount.text("");
-        DOM.entropyBits.text("");
-        DOM.entropyBitsPerEvent.text("");
+        DOM.entropyWordCount.text("0");
+        DOM.entropyEventCount.text("0");
+        DOM.entropyBitsPerEvent.text("0");
+        DOM.entropyBits.text("0");
+        DOM.entropyFiltered.html("&nbsp;");
+        DOM.entropyBinary.html("&nbsp;");
     }
 
     function showEntropyFeedback(entropy) {
@@ -804,17 +807,56 @@
         if (entropy.binaryStr.length >= 192) {
             strength = "extremely strong";
         }
-        var bitsStr = entropy.binaryStr.length;
-        if (entropy.base.asInt != 2) {
-            bitsStr += " (" + entropy.binaryStr + ")";
-        }
-        DOM.entropyFiltered.text(entropy.cleanStr);
+        // If time to crack is less than one day, and password is considered
+        // strong or better based on the number of bits, rename strength to
+        // 'easily cracked'.
+        var z = zxcvbn(entropy.cleanStr);
+        var timeToCrack = z.crack_times_seconds.offline_fast_hashing_1e10_per_second;
+        if (timeToCrack < 86400 && entropy.binaryStr.length >= 128) {
+            strength = "easily cracked";
+            if (z.feedback.warning != "") {
+                strength = strength + " - " + z.feedback.warning;
+            };
+        }
+        var bitsStr = getNumberOfEntropyBits(entropy);
+        var wordCount = Math.floor(entropy.binaryStr.length / 32) * 3;
+        DOM.entropyFiltered.html(entropy.cleanHtml);
         DOM.entropyType.text(entropy.base.str);
         DOM.entropyStrength.text(strength);
         DOM.entropyEventCount.text(entropy.base.ints.length);
         DOM.entropyBits.text(bitsStr);
+        DOM.entropyWordCount.text(wordCount);
+        DOM.entropyBinary.text(entropy.binaryStr);
         DOM.entropyBitsPerEvent.text(Math.log2(entropy.base.asInt).toFixed(2));
-        DOM.entropyFeedback.removeClass("hidden");
+    }
+
+    function getNumberOfEntropyBits(entropy) {
+        var bitsStr = entropy.binaryStr.length.toString();
+        // If using cards, assume they are not reused, thus additional entropy
+        // decreases as more cards are used. This means entropy is measured
+        // using n!, not base^n.
+        // eg the second last card can be only one of two, not one of fifty two
+        // so the added entropy for that card is only one bit at most
+        if (entropy.base.asInt == 52) {
+            var totalCombos = factorial(52);
+            var remainingCards = 52 - entropy.base.parts.length;
+            var remainingCombos = factorial(remainingCards);
+            var currentCombos = totalCombos.divide(remainingCombos);
+            bitsStr = currentCombos.toString(2).length.toString();
+        }
+        return bitsStr
+    }
+
+    // Depends on BigInteger
+    function factorial(n) {
+        if (n == 0) {
+            return 1;
+        }
+        f = BigInteger.ONE;
+        for (var i=1; i<=n; i++) {
+            f = f.multiply(new BigInteger(i));
+        }
+        return f;
     }
 
     var networks = [