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sha.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>SHA256</title>
<style>
#topper{
background-color:#000000;
color:#ffffff;
font-family:"segoe ui", sans-serif;
height:180px;
padding-top:20px;
margin-bottom:40px;
}
h1{
font-size:24pt;
}
h4{
font-size:16pt;
}
input{
margin-top:10px;
margin-bottom:10px;
}
body{
background-color:#ffffff;
color:#000000;
font-family:calibri;
margin-left:0px;
margin-right:0px;
margin-top:0px;
}
button{
background-color:#505050;
border:2px solid #505050;
color:white;
padding: 8px;
width:500px;
text-align:center;
display:inline-block;
transition-duration:0.3s;
border-radius:2px;
margin-top:5mm;
margin-bottom:5mm;
}
button.halfsize {
width: 250px;
margin-left:5px;
margin-right: 5px;
}
button:hover{
background-color:white;
color:black;
}
button:active{
background-color:#E0E0E0;
transition-duration:0s;
}
#footer{
font-size:8pt;
color:#8f8f8f;
margin-top:20px;
}
</style>
<script>
/**
* Base64 encode / decode
* http://www.webtoolkit.info/
**/
var Base64 = {
// private property
_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
// public method for encoding
encode : function (input) {
var output = "";
var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
var i = 0;
input = Base64._utf8_encode(input);
while (i < input.length) {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output = output +
this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
}
return output;
},
// public method for decoding
decode : function (input) {
var output = "";
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
while (i < input.length) {
enc1 = this._keyStr.indexOf(input.charAt(i++));
enc2 = this._keyStr.indexOf(input.charAt(i++));
enc3 = this._keyStr.indexOf(input.charAt(i++));
enc4 = this._keyStr.indexOf(input.charAt(i++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
output = output + String.fromCharCode(chr1);
if (enc3 != 64) {
output = output + String.fromCharCode(chr2);
}
if (enc4 != 64) {
output = output + String.fromCharCode(chr3);
}
}
output = Base64._utf8_decode(output);
return output;
},
// private method for UTF-8 encoding
_utf8_encode : function (string) {
string = string.replace(/\r\n/g,"\n");
var utftext = "";
for (var n = 0; n < string.length; n++) {
var c = string.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
}
else if((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
}
else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
},
// private method for UTF-8 decoding
_utf8_decode : function (utftext) {
var string = "";
var i = 0;
var c = c1 = c2 = 0;
while ( i < utftext.length ) {
c = utftext.charCodeAt(i);
if (c < 128) {
string += String.fromCharCode(c);
i++;
}
else if((c > 191) && (c < 224)) {
c2 = utftext.charCodeAt(i+1);
string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
i += 2;
}
else {
c2 = utftext.charCodeAt(i+1);
c3 = utftext.charCodeAt(i+2);
string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
i += 3;
}
}
return string;
}
}
/**
* Secure Hash Algorithm (SHA256)
* http://www.webtoolkit.info/
* Original code by Angel Marin, Paul Johnston
**/
function SHA256(s){
var chrsz = 8;
var hexcase = 0;
function safe_add (x, y) {
var lsw = (x & 0xFFFF) + (y & 0xFFFF);
var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xFFFF);
}
function S (X, n) { return ( X >>> n ) | (X << (32 - n)); }
function R (X, n) { return ( X >>> n ); }
function Ch(x, y, z) { return ((x & y) ^ ((~x) & z)); }
function Maj(x, y, z) { return ((x & y) ^ (x & z) ^ (y & z)); }
function Sigma0256(x) { return (S(x, 2) ^ S(x, 13) ^ S(x, 22)); }
function Sigma1256(x) { return (S(x, 6) ^ S(x, 11) ^ S(x, 25)); }
function Gamma0256(x) { return (S(x, 7) ^ S(x, 18) ^ R(x, 3)); }
function Gamma1256(x) { return (S(x, 17) ^ S(x, 19) ^ R(x, 10)); }
function core_sha256 (m, l) {
var K = new Array(0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5, 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, 0xE49B69C1, 0xEFBE4786, 0xFC19DC6, 0x240CA1CC, 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA, 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, 0xC6E00BF3, 0xD5A79147, 0x6CA6351, 0x14292967, 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3, 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070, 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3, 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2);
var HASH = new Array(0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A, 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19);
var W = new Array(64);
var a, b, c, d, e, f, g, h, i, j;
var T1, T2;
m[l >> 5] |= 0x80 << (24 - l % 32);
m[((l + 64 >> 9) << 4) + 15] = l;
for ( var i = 0; i<m.length; i+=16 ) {
a = HASH[0];
b = HASH[1];
c = HASH[2];
d = HASH[3];
e = HASH[4];
f = HASH[5];
g = HASH[6];
h = HASH[7];
for ( var j = 0; j<64; j++) {
if (j < 16) W[j] = m[j + i];
else W[j] = safe_add(safe_add(safe_add(Gamma1256(W[j - 2]), W[j - 7]), Gamma0256(W[j - 15])), W[j - 16]);
T1 = safe_add(safe_add(safe_add(safe_add(h, Sigma1256(e)), Ch(e, f, g)), K[j]), W[j]);
T2 = safe_add(Sigma0256(a), Maj(a, b, c));
h = g;
g = f;
f = e;
e = safe_add(d, T1);
d = c;
c = b;
b = a;
a = safe_add(T1, T2);
}
HASH[0] = safe_add(a, HASH[0]);
HASH[1] = safe_add(b, HASH[1]);
HASH[2] = safe_add(c, HASH[2]);
HASH[3] = safe_add(d, HASH[3]);
HASH[4] = safe_add(e, HASH[4]);
HASH[5] = safe_add(f, HASH[5]);
HASH[6] = safe_add(g, HASH[6]);
HASH[7] = safe_add(h, HASH[7]);
}
return HASH;
}
function str2binb (str) {
var bin = Array();
var mask = (1 << chrsz) - 1;
for(var i = 0; i < str.length * chrsz; i += chrsz) {
bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (24 - i % 32);
}
return bin;
}
function Utf8Encode(string) {
string = string.replace(/\r\n/g,'\n');
var utftext = '';
for (var n = 0; n < string.length; n++) {
var c = string.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
}
else if((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
}
else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
}
function binb2hex (binarray) {
var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef';
var str = '';
for(var i = 0; i < binarray.length * 4; i++) {
str += hex_tab.charAt((binarray[i>>2] >> ((3 - i % 4)*8+4)) & 0xF) +
hex_tab.charAt((binarray[i>>2] >> ((3 - i % 4)*8 )) & 0xF);
}
return str;
}
s = Utf8Encode(s);
return binb2hex(core_sha256(str2binb(s), s.length * chrsz));
}
function buttonClick(){
var s = document.getElementById("ftext").value;
var r = document.getElementById("frounds").value;
var i;
for (i = 0; i < r; i++) {
s = SHA256(s);
}
document.getElementById("fhashout").value = s;
}
function encode64(){
var s = document.getElementById("fhashout").value;
document.getElementById("fencode").value = btoa(s);
}
function extractText(left) {
var s = document.getElementById("fencode").value;
var count = document.getElementById("fchars").value;
if (left) {
document.getElementById("ftruncate").value = s.slice(0, count);
}
else {
var p = s.length - 1;
while (s[p] == "=") p--;
p++;
var out = s.slice(p - count, p);
document.getElementById("ftruncate").value = out;
}
}
function textChanged() {
var len = document.getElementById("ftext").value.length;
document.getElementById("textchange").innerHTML = `${len} characters`;
}
</script>
</head>
<body>
<section id=topper>
<div align=center>
<h1 style="font-weight:normal;">MY WEB PLAYGROUND</h1>
<h4 style="font-weight:normal;">SHA256-HASH / BASE64-ENCODER</h4>
</div>
</section>
<!--<div style="text-align:center">
<label for="frounds">No. Rounds:</label>
</div>-->
<div style="display: flex; flex-flow: column;align-items: center;max-width: 1200px; margin:0 auto">
<!--<label for="ftext" style="float:center;">Raw String:</label>-->
<input type="text" id="ftext" name="ftext" size=64 placeholder="Raw String" style="margin-top:0px;" onchange="textChanged()">
<span id="textchange">0 characters</span>
<input type="number" id="frounds" name="frounds" min="1" placeholder="No. Rounds" size=64>
<button type="button" onclick="buttonClick()">Calculate</button>
<input type="text" id="fhashout" name="fhashout" readonly size=128 placeholder="Output hash">
<button type="button" onclick="encode64()">Encode Base64</button>
<input type="text" id="fencode" name="fencode" readonly size=128 placeholder="Encoded Output">
<input type="number" id="fchars" name="fchars" min="1" placeholder="No. Chars" size=64>
<div style="display:flex">
<button class="halfsize" type="button" onclick="extractText(true)">Extract Left</button>
<button class="halfsize" type="button" onclick="extractText(false)">Extract Right</button>
</div>
<input type="text" id="ftruncate" name="ftruncate" readonly size=128 placeholder="Truncated Output">
<div id=footer>
Thats it, there is no more. For now.
</div>
</div>
</body>
</html>