added ciphers

Author: TelychkoFoundation

encryption/caesars_cipher.js

@@ -0,0 +1,39 @@
+var cipherText;
+
+function caesarsCipherCrypt(str, key) {
+    var i = 0, toUp = str.toUpperCase(), size = toUp.length, newStr = [];
+    for(; i < size; i += 1) {
+        var toCode = toUp[i].charCodeAt(0);
+        if(toCode < 65 || toCode > 90) {
+            newStr[i] = String.fromCharCode(toCode);
+        } else if(toCode < 78) {
+            newStr[i] = String.fromCharCode(toCode + key);
+        } else {
+            newStr[i] = String.fromCharCode(toCode - key);
+        }
+    }
+
+    cipherText = newStr.join('');
+    return cipherText;
+}
+
+caesarsCipherCrypt('HELLO', 10);
+
+function caesarsCipherEncrypt(str) {
+    var i = 0, toUp = str.toUpperCase(), size = toUp.length, newStr = [];
+    for(; i < size; i += 1) {
+        var toCode = toUp[i].charCodeAt(0);
+        if(toCode < 65 || toCode > 90) {
+            newStr[i] = String.fromCharCode(toCode);
+        } else if(toCode < 78) {
+            newStr[i] = String.fromCharCode(toCode + 10);
+        } else {
+            newStr[i] = String.fromCharCode(toCode - 10);
+        }
+    }
+
+    cipherText = newStr.join('');
+    return cipherText;
+}
+
+caesarsCipherEncrypt(cipherText);

encryption/oneTimePad.js renamed to encryption/one_time_pad.js

@@ -0,0 +1,21 @@
+var map = {
+    a: 'q', b: 'w', c: 'e',
+    d: 'r', e: 't', f: 'y',
+    g: 'u', h: 'i', i: 'o',
+    j: 'p', k: 'a', l: 's',
+    m: 'd', n: 'f', o: 'g',
+    p: 'h', q: 'j', r: 'k',
+    s: 'l', t: 'z', u: 'x',
+    v: 'c', w: 'v', x: 'b',
+    y: 'n', z: 'm'
+}, text = 'Hello World!';
+
+function substitutionCipherCrypt(text) {
+    return text.split('').filter(function(v) {
+            return map.hasOwnProperty(v.toLowerCase());
+        }).map(function(v) {
+            return map[v.toLowerCase()].toUpperCase();
+        }).join('');
+}
+
+substitutionCipherCrypt(text);

encryption/substitution_cipher.js

@@ -1,5 +1,5 @@
-// function reverseInPlace(str){
-//     return str.split(' ').reverse().join(' ').split('').reverse().join('');
-// }
-//
-// reverseInPlace('I am the good boy');
+function reverseInPlace(str){
+    return str.split(' ').reverse().join(' ').split('').reverse().join('');
+}
+
+reverseInPlace('I am the good boy');

encryption/transposition.js

@@ -0,0 +1,48 @@
+var tabulaRecta = {
+    a: "abcdefghijklmnopqrstuvwxyz",
+    b: "bcdefghijklmnopqrstuvwxyza",
+    c: "cdefghijklmnopqrstuvwxyzab",
+    d: "defghijklmnopqrstuvwxyzabc",
+    e: "efghijklmnopqrstuvwxyzabcd",
+    f: "fghijklmnopqrstuvwxyzabcde",
+    g: "ghijklmnopqrstuvwxyzabcdef",
+    h: "hijklmnopqrstuvwxyzabcdefg",
+    i: "ijklmnopqrstuvwxyzabcdefgh",
+    j: "jklmnopqrstuvwxyzabcdefghi",
+    k: "klmnopqrstuvwxyzabcdefghij",
+    l: "lmnopqrstuvwxyzabcdefghijk",
+    m: "mnopqrstuvwxyzabcdefghijkl",
+    n: "nopqrstuvwxyzabcdefghijklm",
+    o: "opqrstuvwxyzabcdefghijklmn",
+    p: "pqrstuvwxyzabcdefghijklmno",
+    q: "qrstuvwxyzabcdefghijklmnop",
+    r: "rstuvwxyzabcdefghijklmnopq",
+    s: "stuvwxyzabcdefghijklmnopqr",
+    t: "tuvwxyzabcdefghijklmnopqrs",
+    u: "uvwxyzabcdefghijklmnopqrst",
+    v: "vwxyzabcdefghijklmnopqrstu",
+    w: "wxyzabcdefghijklmnopqrstuv",
+    x: "xyzabcdefghijklmnopqrstuvw",
+    y: "yzabcdefghijklmnopqrstuvwx",
+    z: "zabcdefghijklmnopqrstuvwxy"
+};
+
+function vigenereCipherCrypt(encryptWord, key) {
+    var i, size = encryptWord.length,
+        keySize = key.length,
+        encryptedText = '',
+        specialCharacterCount = 0;
+    for(i = 0; i < size; i += 1) {
+        var keyLetter = (i - specialCharacterCount) % keySize,
+            keywordIndex = tabulaRecta.a.indexOf(key[keyLetter]);
+        if(tabulaRecta[encryptWord[i]]){
+            encryptedText += tabulaRecta[encryptWord[i]][keywordIndex];
+        } else {
+            encryptedText += encryptWord[i];
+            specialCharacterCount++;
+        }
+    }
+    return encryptedText;
+}
+
+vigenereCipherCrypt('steve', 'abc');