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index.html
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<!DOCTYPE html> <!--This tells the browser that it's a html file-->
<html> <!--HTML file content is between html tags-->
<head> <!--The content isn't visible in the browser-->
<title>Crypto4u</title> <!--The name of the website-->
<meta charset="utf-8"> <!-- we use utf-8 coding for the website-->
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body, html {
height: 100%; /* Make sure that the image covers the whole screen*/
margin: 0;
}
.bg {
background-image: url("background.jpg"); /* The image used */
height: 100%; /* Full height */
background-position: center; /* Center the image */
background-repeat: no-repeat; /* Do not repeat the background */
background-size: cover; /* Scale the image */
.button_css { /* To configure the buttons */
background-color: #f9df4b;
border: none;
color: black;
text-align: center;
cursor: pointer;
}
}
</style>
</head>
<body> <!--Contains content which is visible in the browser-->
<div class="bg">
<center>
<br>
<p>
<!-- display website name, the author and logo-->
<object type="image/svg+xml" data="NameAuthorLogo.svg"style="width:400px;height:250px"></object>
</p>
<p>
<!-- user input textarea -->
<textarea id="userInput" rows="8" cols="55" style="background-color:#03091f;
color:#f9df4b; border-color:#f9df4b">Insert the text you wish to encrypt or decrypt here.</textarea>
<!-- make the user input textarea, change its height, width, background color, text color,
border color -->
</p>
<p>
<!-- key textarea -->
<textarea id="key" rows="1" cols="55" style="background-color:#03091f;
color:#f9df4b; border-color:#f9df4b">Insert the key here for OTP.</textarea>
</p>
<!-- buttons for encrypting and decrypting -->
<button style="background-color:#f9df4b; border-color:#f9df4b"
onclick="OTPencrypt()">OTP-encrypt</button>
<button style="background-color:#f9df4b; border-color:#f9df4b"
onclick="OTPdecrypt()">OTP-decrypt</button>
<button style="background-color:#f9df4b; border-color:#f9df4b"
onclick="SHA2()">SHA-2 -> SHA-512</button>
<button style="background-color:#f9df4b; border-color:#f9df4b"
onclick="MD5decrypt()"><del>MD5 decrypt</del></button>
<!-- Pressing the button calls out the desired method -->
<p>
<textarea readonly rows="8" cols="55" id="result" style="background-color:#03091f;
color:#f9df4b; border-color:#f9df4b">The result will be displayed here.</textarea>
<!-- output text box which is read only -->
</p>
<script>
function OTPencrypt() { // encrypting user input
text = document.getElementById("userInput").value;
key = document.getElementById("key").value;
document.getElementById("result").innerHTML = OneTimePad(1, text, key);
}
function OTPdecrypt() { // decrypting user input
text = document.getElementById("userInput").value;
key = document.getElementById("key").value;
document.getElementById("result").innerHTML = OneTimePad(-1, text, key);
}
function SHA2() { // for SHA2 encryption
text = document.getElementById("userInput").value;
document.getElementById("result").innerHTML = SHA512(text);
}
function MD5decrypt() {
}
// One-Time Pad
// This code was written by Tyler Akins and placed in the public domain.
// It would be nice if you left this header intact. http://rumkin.com
// Implements a one-time pad for only alphabetic characters. Preserves
// the character case in the text (not the key).
// encdec = -1 for decode, 1 for encode
// text = the text to encode or decode.
// key = the key (pad) to use
function OneTimePad(encdec, text, key)
{
var pad, i, out, c, uc;
pad = "";
key = key.toUpperCase();
for (i = 0; i < key.length; i ++)
{
c = key.charAt(i)
if (c >= 'A' && c <= 'Z')
{
pad += c;
}
}
out = "";
for (i = 0; i < text.length; i ++)
{
c = text.charAt(i);
uc = ' ';
if (c >= 'A' && c <= 'Z')
{
uc = 'A';
}
if (c >= 'a' && c <= 'z')
{
uc = 'a';
}
if (uc != ' ')
{
if (pad.length == 0)
{
pad = "AAAAAAAA";
}
c = c.charCodeAt(0) - uc.charCodeAt(0) +
encdec * (pad.charCodeAt(0) - 'A'.charCodeAt(0));
c = (c + 26) % 26;
c = String.fromCharCode(uc.charCodeAt(0) + c);
pad = pad.slice(1, pad.length);
}
out += c;
}
return out;
}
/*
* Secure Hash Algorithm (SHA512)
* http://www.happycode.info/
*/
function SHA512(str) {
function int64(msint_32, lsint_32) {
this.highOrder = msint_32;
this.lowOrder = lsint_32;
}
var H = [new int64(0x6a09e667, 0xf3bcc908), new int64(0xbb67ae85, 0x84caa73b),
new int64(0x3c6ef372, 0xfe94f82b), new int64(0xa54ff53a, 0x5f1d36f1),
new int64(0x510e527f, 0xade682d1), new int64(0x9b05688c, 0x2b3e6c1f),
new int64(0x1f83d9ab, 0xfb41bd6b), new int64(0x5be0cd19, 0x137e2179)];
var K = [new int64(0x428a2f98, 0xd728ae22), new int64(0x71374491, 0x23ef65cd),
new int64(0xb5c0fbcf, 0xec4d3b2f), new int64(0xe9b5dba5, 0x8189dbbc),
new int64(0x3956c25b, 0xf348b538), new int64(0x59f111f1, 0xb605d019),
new int64(0x923f82a4, 0xaf194f9b), new int64(0xab1c5ed5, 0xda6d8118),
new int64(0xd807aa98, 0xa3030242), new int64(0x12835b01, 0x45706fbe),
new int64(0x243185be, 0x4ee4b28c), new int64(0x550c7dc3, 0xd5ffb4e2),
new int64(0x72be5d74, 0xf27b896f), new int64(0x80deb1fe, 0x3b1696b1),
new int64(0x9bdc06a7, 0x25c71235), new int64(0xc19bf174, 0xcf692694),
new int64(0xe49b69c1, 0x9ef14ad2), new int64(0xefbe4786, 0x384f25e3),
new int64(0x0fc19dc6, 0x8b8cd5b5), new int64(0x240ca1cc, 0x77ac9c65),
new int64(0x2de92c6f, 0x592b0275), new int64(0x4a7484aa, 0x6ea6e483),
new int64(0x5cb0a9dc, 0xbd41fbd4), new int64(0x76f988da, 0x831153b5),
new int64(0x983e5152, 0xee66dfab), new int64(0xa831c66d, 0x2db43210),
new int64(0xb00327c8, 0x98fb213f), new int64(0xbf597fc7, 0xbeef0ee4),
new int64(0xc6e00bf3, 0x3da88fc2), new int64(0xd5a79147, 0x930aa725),
new int64(0x06ca6351, 0xe003826f), new int64(0x14292967, 0x0a0e6e70),
new int64(0x27b70a85, 0x46d22ffc), new int64(0x2e1b2138, 0x5c26c926),
new int64(0x4d2c6dfc, 0x5ac42aed), new int64(0x53380d13, 0x9d95b3df),
new int64(0x650a7354, 0x8baf63de), new int64(0x766a0abb, 0x3c77b2a8),
new int64(0x81c2c92e, 0x47edaee6), new int64(0x92722c85, 0x1482353b),
new int64(0xa2bfe8a1, 0x4cf10364), new int64(0xa81a664b, 0xbc423001),
new int64(0xc24b8b70, 0xd0f89791), new int64(0xc76c51a3, 0x0654be30),
new int64(0xd192e819, 0xd6ef5218), new int64(0xd6990624, 0x5565a910),
new int64(0xf40e3585, 0x5771202a), new int64(0x106aa070, 0x32bbd1b8),
new int64(0x19a4c116, 0xb8d2d0c8), new int64(0x1e376c08, 0x5141ab53),
new int64(0x2748774c, 0xdf8eeb99), new int64(0x34b0bcb5, 0xe19b48a8),
new int64(0x391c0cb3, 0xc5c95a63), new int64(0x4ed8aa4a, 0xe3418acb),
new int64(0x5b9cca4f, 0x7763e373), new int64(0x682e6ff3, 0xd6b2b8a3),
new int64(0x748f82ee, 0x5defb2fc), new int64(0x78a5636f, 0x43172f60),
new int64(0x84c87814, 0xa1f0ab72), new int64(0x8cc70208, 0x1a6439ec),
new int64(0x90befffa, 0x23631e28), new int64(0xa4506ceb, 0xde82bde9),
new int64(0xbef9a3f7, 0xb2c67915), new int64(0xc67178f2, 0xe372532b),
new int64(0xca273ece, 0xea26619c), new int64(0xd186b8c7, 0x21c0c207),
new int64(0xeada7dd6, 0xcde0eb1e), new int64(0xf57d4f7f, 0xee6ed178),
new int64(0x06f067aa, 0x72176fba), new int64(0x0a637dc5, 0xa2c898a6),
new int64(0x113f9804, 0xbef90dae), new int64(0x1b710b35, 0x131c471b),
new int64(0x28db77f5, 0x23047d84), new int64(0x32caab7b, 0x40c72493),
new int64(0x3c9ebe0a, 0x15c9bebc), new int64(0x431d67c4, 0x9c100d4c),
new int64(0x4cc5d4be, 0xcb3e42b6), new int64(0x597f299c, 0xfc657e2a),
new int64(0x5fcb6fab, 0x3ad6faec), new int64(0x6c44198c, 0x4a475817)];
var W = new Array(64);
var a, b, c, d, e, f, g, h, i, j;
var T1, T2;
var charsize = 8;
function utf8_encode(str) {
return unescape(encodeURIComponent(str));
}
function str2binb(str) {
var bin = [];
var mask = (1 << charsize) - 1;
var len = str.length * charsize;
for (var i = 0; i < len; i += charsize) {
bin[i >> 5] |= (str.charCodeAt(i / charsize) & mask) << (32 - charsize - (i % 32));
}
return bin;
}
function binb2hex(binarray) {
var hex_tab = '0123456789abcdef';
var str = '';
var length = binarray.length * 4;
var srcByte;
for (var i = 0; i < length; i += 1) {
srcByte = binarray[i >> 2] >> ((3 - (i % 4)) * 8);
str += hex_tab.charAt((srcByte >> 4) & 0xF) + hex_tab.charAt(srcByte & 0xF);
}
return str;
}
function safe_add_2(x, y) {
var lsw, msw, lowOrder, highOrder;
lsw = (x.lowOrder & 0xFFFF) + (y.lowOrder & 0xFFFF);
msw = (x.lowOrder >>> 16) + (y.lowOrder >>> 16) + (lsw >>> 16);
lowOrder = ((msw & 0xFFFF) << 16) | (lsw & 0xFFFF);
lsw = (x.highOrder & 0xFFFF) + (y.highOrder & 0xFFFF) + (msw >>> 16);
msw = (x.highOrder >>> 16) + (y.highOrder >>> 16) + (lsw >>> 16);
highOrder = ((msw & 0xFFFF) << 16) | (lsw & 0xFFFF);
return new int64(highOrder, lowOrder);
}
function safe_add_4(a, b, c, d) {
var lsw, msw, lowOrder, highOrder;
lsw = (a.lowOrder & 0xFFFF) + (b.lowOrder & 0xFFFF) + (c.lowOrder & 0xFFFF) + (d.lowOrder & 0xFFFF);
msw = (a.lowOrder >>> 16) + (b.lowOrder >>> 16) + (c.lowOrder >>> 16) + (d.lowOrder >>> 16) + (lsw >>> 16);
lowOrder = ((msw & 0xFFFF) << 16) | (lsw & 0xFFFF);
lsw = (a.highOrder & 0xFFFF) + (b.highOrder & 0xFFFF) + (c.highOrder & 0xFFFF) + (d.highOrder & 0xFFFF) + (msw >>> 16);
msw = (a.highOrder >>> 16) + (b.highOrder >>> 16) + (c.highOrder >>> 16) + (d.highOrder >>> 16) + (lsw >>> 16);
highOrder = ((msw & 0xFFFF) << 16) | (lsw & 0xFFFF);
return new int64(highOrder, lowOrder);
}
function safe_add_5(a, b, c, d, e) {
var lsw, msw, lowOrder, highOrder;
lsw = (a.lowOrder & 0xFFFF) + (b.lowOrder & 0xFFFF) + (c.lowOrder & 0xFFFF) + (d.lowOrder & 0xFFFF) + (e.lowOrder & 0xFFFF);
msw = (a.lowOrder >>> 16) + (b.lowOrder >>> 16) + (c.lowOrder >>> 16) + (d.lowOrder >>> 16) + (e.lowOrder >>> 16) + (lsw >>> 16);
lowOrder = ((msw & 0xFFFF) << 16) | (lsw & 0xFFFF);
lsw = (a.highOrder & 0xFFFF) + (b.highOrder & 0xFFFF) + (c.highOrder & 0xFFFF) + (d.highOrder & 0xFFFF) + (e.highOrder & 0xFFFF) + (msw >>> 16);
msw = (a.highOrder >>> 16) + (b.highOrder >>> 16) + (c.highOrder >>> 16) + (d.highOrder >>> 16) + (e.highOrder >>> 16) + (lsw >>> 16);
highOrder = ((msw & 0xFFFF) << 16) | (lsw & 0xFFFF);
return new int64(highOrder, lowOrder);
}
function maj(x, y, z) {
return new int64(
(x.highOrder & y.highOrder) ^ (x.highOrder & z.highOrder) ^ (y.highOrder & z.highOrder),
(x.lowOrder & y.lowOrder) ^ (x.lowOrder & z.lowOrder) ^ (y.lowOrder & z.lowOrder)
);
}
function ch(x, y, z) {
return new int64(
(x.highOrder & y.highOrder) ^ (~x.highOrder & z.highOrder),
(x.lowOrder & y.lowOrder) ^ (~x.lowOrder & z.lowOrder)
);
}
function rotr(x, n) {
if (n <= 32) {
return new int64(
(x.highOrder >>> n) | (x.lowOrder << (32 - n)),
(x.lowOrder >>> n) | (x.highOrder << (32 - n))
);
} else {
return new int64(
(x.lowOrder >>> n) | (x.highOrder << (32 - n)),
(x.highOrder >>> n) | (x.lowOrder << (32 - n))
);
}
}
function sigma0(x) {
var rotr28 = rotr(x, 28);
var rotr34 = rotr(x, 34);
var rotr39 = rotr(x, 39);
return new int64(
rotr28.highOrder ^ rotr34.highOrder ^ rotr39.highOrder,
rotr28.lowOrder ^ rotr34.lowOrder ^ rotr39.lowOrder
);
}
function sigma1(x) {
var rotr14 = rotr(x, 14);
var rotr18 = rotr(x, 18);
var rotr41 = rotr(x, 41);
return new int64(
rotr14.highOrder ^ rotr18.highOrder ^ rotr41.highOrder,
rotr14.lowOrder ^ rotr18.lowOrder ^ rotr41.lowOrder
);
}
function gamma0(x) {
var rotr1 = rotr(x, 1), rotr8 = rotr(x, 8), shr7 = shr(x, 7);
return new int64(
rotr1.highOrder ^ rotr8.highOrder ^ shr7.highOrder,
rotr1.lowOrder ^ rotr8.lowOrder ^ shr7.lowOrder
);
}
function gamma1(x) {
var rotr19 = rotr(x, 19);
var rotr61 = rotr(x, 61);
var shr6 = shr(x, 6);
return new int64(
rotr19.highOrder ^ rotr61.highOrder ^ shr6.highOrder,
rotr19.lowOrder ^ rotr61.lowOrder ^ shr6.lowOrder
);
}
function shr(x, n) {
if (n <= 32) {
return new int64(
x.highOrder >>> n,
x.lowOrder >>> n | (x.highOrder << (32 - n))
);
} else {
return new int64(
0,
x.highOrder << (32 - n)
);
}
}
str = utf8_encode(str);
strlen = str.length*charsize;
str = str2binb(str);
str[strlen >> 5] |= 0x80 << (24 - strlen % 32);
str[(((strlen + 128) >> 10) << 5) + 31] = strlen;
for (var i = 0; i < str.length; i += 32) {
a = H[0];
b = H[1];
c = H[2];
d = H[3];
e = H[4];
f = H[5];
g = H[6];
h = H[7];
for (var j = 0; j < 80; j++) {
if (j < 16) {
W[j] = new int64(str[j*2 + i], str[j*2 + i + 1]);
} else {
W[j] = safe_add_4(gamma1(W[j - 2]), W[j - 7], gamma0(W[j - 15]), W[j - 16]);
}
T1 = safe_add_5(h, sigma1(e), ch(e, f, g), K[j], W[j]);
T2 = safe_add_2(sigma0(a), maj(a, b, c));
h = g;
g = f;
f = e;
e = safe_add_2(d, T1);
d = c;
c = b;
b = a;
a = safe_add_2(T1, T2);
}
H[0] = safe_add_2(a, H[0]);
H[1] = safe_add_2(b, H[1]);
H[2] = safe_add_2(c, H[2]);
H[3] = safe_add_2(d, H[3]);
H[4] = safe_add_2(e, H[4]);
H[5] = safe_add_2(f, H[5]);
H[6] = safe_add_2(g, H[6]);
H[7] = safe_add_2(h, H[7]);
}
var binarray = [];
for (var i = 0; i < H.length; i++) {
binarray.push(H[i].highOrder);
binarray.push(H[i].lowOrder);
}
return binb2hex(binarray);
}
</script>
</center>
</div>
</body>
</html>