algorithm/JavaScript
1
0
Fork 0
mirror of https://github.com/TheAlgorithms/JavaScript.git synced 2025-07-07 11:08:54 +08:00
Code Issues Packages Projects Releases Wiki Activity

Update keyFinder.js

Browse Source 
some changes is made to optimize the function
This commit is contained in:
Wan Cheuk Lun
2018-10-27 12:29:36 +08:00
committed by GitHub
parent e0fa99b2fd
commit e41ad76298
1 changed files with 5 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
Ciphers/keyFinder.js
View File

@ -2,16 +2,14 @@
Find and retrieve the encryption key automatically Find and retrieve the encryption key automatically
Note: This is a draft version, please help to modify, Thanks! Note: This is a draft version, please help to modify, Thanks!
******************************************************/ ******************************************************/
function keyFinder(){ function keyFinder(str){ // str is used to get the input of encrypted string
var result = ""; var key = 0; // return zero means the key can not be found
var key = 0;
var wordbank =["is","Is","am","Am","are","Are","have","Have","has","Has","may","May","be","Be"]; var wordbank =["is","Is","am","Am","are","Are","have","Have","has","Has","may","May","be","Be"];
var shiftNum = 0; //count the number of key shifted //var shiftNum = 0; //count the number of key shifted
var str = document.getElementById("encryptedID").value; //get the input string
var inStr = str.toString(); //convert the input to String var inStr = str.toString(); //convert the input to String
var outStr = ""; // store the output value var outStr = ""; // store the output value
document.getElementById("debug").innerHTML = shiftNum; // debug: display the shifted number(s) //document.getElementById("debug").innerHTML = shiftNum; // debug: display the shifted number(s)
for (var i=0; i<26; i++){ for (var i=0; i<(52); i++){ //try the number of key shifted, the sum of character from a-z and A-Z is 26*2=52
outStr = caesarCipherEncodeAndDecodeEngine(inStr,i); // use the encrytpion engine to decrypt the input string, shiftNum=i outStr = caesarCipherEncodeAndDecodeEngine(inStr,i); // use the encrytpion engine to decrypt the input string, shiftNum=i
for ( var i=0; i<wordbank.length; i++){ for ( var i=0; i<wordbank.length; i++){
if (wordbank[i] == outStr[i]+outStr[i+1]{ if (wordbank[i] == outStr[i]+outStr[i+1]{