"use strict"; class Kice2 { constructor() { } _generateSortedAlphabet() { let characters = []; for(let c = 29; c < 127; ++c){ characters.push(c); } return characters; } _getIntegerValueFromArray(c, alphabet, isCharacter) { for(let i = 0; i < alphabet.length; ++i) if((!isCharacter && alphabet[i] == c.charCodeAt(0)) || (isCharacter && alphabet[i] == c)) return i; return -1; } _getIntFromChar(i) { switch(i) { case '\t': return 29; case '\r': return 30; case '\n': return 31; default: return i.charCodeAt(0); } } _getCharFromInt(c) { switch(c){ case 29: return '\t'; case 30: return '\r' case 31: return '\n'; default: return String.fromCharCode(c); } } _generateCypherAlphabet(password) { // create alphabet let characters = this._generateSortedAlphabet(); // shuffle alphabet let shuffled = [...characters]; for(let c of password){ if((c.charCodeAt(0) > 31 && c.charCodeAt(0) < 127) || c == '\n' || c == '\t' || c == '\r'){ let used = []; for(let i = 0; i < shuffled.length; ++i) used.push(false); let last = this._getIntegerValueFromArray(this._getIntFromChar(c), characters, true); for(let i = 0; i < shuffled.length; ++i){ shuffled[i] += last; if(shuffled[i] > 126) shuffled[i] -= shuffled.length; while(used[shuffled[i] - 29]){ shuffled[i]++; if(shuffled[i] > 126) shuffled[i] -= shuffled.length; } used[shuffled[i] - 29] = true; last = this._getIntegerValueFromArray(shuffled[i], characters, true); } } } for(let i = 0; i < shuffled.length; ++i){ shuffled[i] = this._getCharFromInt(shuffled[i]); } return shuffled; } _nextSalt(c){ return Math.floor((this._getIntFromChar(c) - 29) / 10) + 1; } _doCypher(p, text, alphabet) { // cypher let last = this._getIntegerValueFromArray(p, alphabet, true); let array = text.split(""); for(let i = 0; i < array.length; ++i){ let id = this._getIntegerValueFromArray(array[i], alphabet, true); if(id == -1) continue; let t = (id + last) % alphabet.length; array[i] = alphabet[t]; last = t; } // salt let salt = this._nextSalt(p); while(salt < array.length){ array.splice(salt, 0, alphabet[Math.floor(Math.random() * alphabet.length)]); salt += this._nextSalt(array[salt]); } return array.join(""); } encrypt(password, text) { // shuffle text using alphabet let shuffled = this._generateCypherAlphabet(password); // cypher text using password for(let c of password){ text = this._doCypher(c, text, shuffled); } // reverse return text.split("").reverse().join(""); } _doDecypher(p, text, alphabet) { // unsalt let array = text.split(""); let salt = this._nextSalt(p); while(salt < array.length){ let tmp = this._nextSalt(array[salt]); array.splice(salt, 1); salt += tmp - 1; } let last = this._getIntegerValueFromArray(array[array.length - 1], alphabet, true); for(let i = array.length - 1; i >= 0; --i){ let c = ""; if(i) c = array[i - 1]; else c = p; let id = this._getIntegerValueFromArray(c, alphabet, true); if(id == -1) continue; let t = last - id; if(t < 0) t += alphabet.length; array[i] = alphabet[t]; last = id; } return array.join(""); } decrypt(password, text) { // shuffle text using alphabet let shuffled = this._generateCypherAlphabet(password); // reverse text text = text.split("").reverse().join(""); // decypher text using password for(let c of password.split("").reverse().join("")){ text = this._doDecypher(c, text, shuffled); } return text; } } // use of ccypher v2 let print = (main, text) => { main.appendChild(document.createElement("P").appendChild(document.createTextNode(text))); main.appendChild(document.createElement("BR")); } let init = () => { Kice2 = new Kice2(); let text = "my tailor is rich"; let password = "spiro dum spero"; let main = document.getElementById("main"); let test = (text, password) => { print(main, `password: ${password}`); print(main, `Text before cypher: ${text} (length: ${text.length})`); text = Kice2.encrypt(password, text); print(main, `Text after cypher: ${text} (length: ${text.length})`); text = Kice2.decrypt(password, text); print(main, `Text after decypher: ${text} (length: ${text.length})\n`); main.appendChild(document.createElement("BR")); }; let testStrings = ["a", "zjjr%*@", "b", "bc", "c d", password]; let testPasswords = ["a", "@&$ @8", "a b", text]; for(let t of testStrings){ for(let p of testPasswords){ test(t, p); } } init = () => {}; }; onload = setTimeout(init,100);