Merge pull request #280 from mctrivia/add-hack-time-for-split-cards

[perso/Immae/Projets/Cryptomonnaies/BIP39.git] / src / js / index.js

diff --git a/src/js/index.js b/src/js/index.js
index 035a2b3e650af38b678c3df1c79b159bc7fff60e..9d5f8ee633db73ad3e8a07a2d56a7b4a0f1bc3b7 100644 (file)
--- a/src/js/index.js
+++ b/src/js/index.js
@@ -45,6 +45,7 @@
     DOM.entropyFilterWarning = DOM.entropyContainer.find(".filter-warning");
     DOM.phrase = $(".phrase");
        DOM.splitPhrase = $(".phraseSplit");
+       DOM.phraseSplitWarn = $(".phraseSplitWarn");
     DOM.passphrase = $(".passphrase");
     DOM.generateContainer = $(".generate-container");
     DOM.generate = $(".generate");
@@ -1448,6 +1449,18 @@
                        cards[i]='Card '+(i+1)+': '+wordArrayToPhrase(cards[i]);                                                                //combine words on card back to string
                }
                DOM.splitPhrase.val(cards.join("\r\n"));                                                                //make words visible
+               var triesPerSecond=10000000000;                                                                                 //assumed number of tries per second
+               var hackTime=Math.pow(2,wordCount*10/3)/triesPerSecond;                                 //get number of bits of unknown data per card
+               if (hackTime<1) {
+                       hackTime="<1 second";
+               } else if (hackTime<86400) {
+                       hackTime=Math.floor(hackTime)+" seconds";
+               } else if(hackTime<31557600) {
+                       hackTime=Math.floor(hackTime/86400)+" days";
+               } else {
+                       hackTime=Math.floor(hackTime/31557600)+" years";
+               }
+               DOM.phraseSplitWarn.html("Time to hack with only one card: "+hackTime);
        }
 
     function isUsingOwnEntropy() {