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hash_func.js
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hash_func.js
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"use strict";
/**
* Returns the digest in Hex. from the given hashing algorithm and Hex.
* @param {String} hashAlg String, Hashing algo (e.g. SHA-256).
* @param {String} input String, Input Hex being hashed.
* @returns {Hex} String.
* @throws {error} error Error. No hash alg error.
*/
async function HashHex(hashAlg, input) {
// console.debug(hashAlg, input, input.length);
if (isEmpty(hashAlg)) {
throw new Error("No hash algorithm specified");
}
return ArrayBufferToHex(await crypto.subtle.digest(hashAlg, await HexToArrayBuffer(input)));
}
/**
* Extension of HashHex() for supporting SHA3, BLAKE, and extra hashing algos
* that are not natively supported in JS.
* @param {String} hashAlg String, Hashing algo (e.g. SHA-256).
* @param {String} input String, Input Hex being hashed.
* @returns {Hex} String.
* @throws {error} error Error. Unsupported alg error.
*/
async function HashExtrasHex(hashAlg, input) {
// Support for various length output on SHAKE algorithms (in bits).
// For measuring in bytes, remove the divide by 8.
if (hashAlg.length > 7 && hashAlg.substring(0, 5) === "SHAKE") {
let bits = hashAlg.substring(5, 8);
if (hashAlg.length > 9) {
bits = hashAlg.substring(9);
}
var opts = {
dkLen: parseInt(bits) / 8
};
hashAlg = hashAlg.substring(0, 8);
}
let digest;
let ui8 = new Uint8Array(await HexToArrayBuffer(input));
switch (hashAlg) {
case "MD5":
return md5(await HexToS(input)); // Already returns Hex
case "SHA3-224":
digest = window.nobleHashes.sha3_224(ui8);
break;
case "SHA3-256":
digest = window.nobleHashes.sha3_256(ui8);
break;
case "SHA3-384":
digest = window.nobleHashes.sha3_384(ui8);
break;
case "SHA3-512":
digest = window.nobleHashes.sha3_512(ui8);
break;
case "Keccak-224":
digest = window.nobleHashes.keccak_224(ui8);
break;
case "Keccak-256":
digest = window.nobleHashes.keccak_256(ui8);
break;
case "Keccak-384":
digest = window.nobleHashes.keccak_384(ui8);
break;
case "Keccak-512":
digest = window.nobleHashes.keccak_512(ui8);
break;
case "SHAKE128":
digest = window.nobleHashes.cshake128(ui8, opts);
break;
case "SHAKE256":
digest = window.nobleHashes.cshake256(ui8, opts);
break;
case "BLAKE2b":
digest = window.nobleHashes.blake2b(ui8);
break;
case "BLAKE2s":
digest = window.nobleHashes.blake2s(ui8);
break;
case "BLAKE3":
digest = window.nobleHashes.blake3(ui8);
break;
case "SHA-1":
case "SHA-256":
case "SHA-384":
case "SHA-512":
digest = await crypto.subtle.digest(hashAlg, await HexToArrayBuffer(input));
break;
default:
throw new Error('Unsupported algorithm.');
}
return ArrayBufferToHex(digest);
}
// A formatted version of a popular md5 implementation.
// Original copyright (c) Paul Johnston & Greg Holt.
// The function itself is now 42 lines long.
// https://stackoverflow.com/questions/1655769/fastest-md5-implementation-in-javascript/60467595#60467595
function md5(inputString) {
var hc = "0123456789ABCDEF";
function rh(n) {
var j, s = "";
for (j = 0; j <= 3; j++) s += hc.charAt((n >> (j * 8 + 4)) & 0x0F) + hc.charAt((n >> (j * 8)) & 0x0F);
return s;
}
function ad(x, y) {
var l = (x & 0xFFFF) + (y & 0xFFFF);
var m = (x >> 16) + (y >> 16) + (l >> 16);
return (m << 16) | (l & 0xFFFF);
}
function rl(n, c) {
return (n << c) | (n >>> (32 - c));
}
function cm(q, a, b, x, s, t) {
return ad(rl(ad(ad(a, q), ad(x, t)), s), b);
}
function ff(a, b, c, d, x, s, t) {
return cm((b & c) | ((~b) & d), a, b, x, s, t);
}
function gg(a, b, c, d, x, s, t) {
return cm((b & d) | (c & (~d)), a, b, x, s, t);
}
function hh(a, b, c, d, x, s, t) {
return cm(b ^ c ^ d, a, b, x, s, t);
}
function ii(a, b, c, d, x, s, t) {
return cm(c ^ (b | (~d)), a, b, x, s, t);
}
function sb(x) {
var i;
var nblk = ((x.length + 8) >> 6) + 1;
var blks = new Array(nblk * 16);
for (i = 0; i < nblk * 16; i++) blks[i] = 0;
for (i = 0; i < x.length; i++) blks[i >> 2] |= x.charCodeAt(i) << ((i % 4) * 8);
blks[i >> 2] |= 0x80 << ((i % 4) * 8);
blks[nblk * 16 - 2] = x.length * 8;
return blks;
}
var i, x = sb(inputString),
a = 1732584193,
b = -271733879,
c = -1732584194,
d = 271733878,
olda, oldb, oldc, oldd;
for (i = 0; i < x.length; i += 16) {
olda = a;
oldb = b;
oldc = c;
oldd = d;
a = ff(a, b, c, d, x[i + 0], 7, -680876936);
d = ff(d, a, b, c, x[i + 1], 12, -389564586);
c = ff(c, d, a, b, x[i + 2], 17, 606105819);
b = ff(b, c, d, a, x[i + 3], 22, -1044525330);
a = ff(a, b, c, d, x[i + 4], 7, -176418897);
d = ff(d, a, b, c, x[i + 5], 12, 1200080426);
c = ff(c, d, a, b, x[i + 6], 17, -1473231341);
b = ff(b, c, d, a, x[i + 7], 22, -45705983);
a = ff(a, b, c, d, x[i + 8], 7, 1770035416);
d = ff(d, a, b, c, x[i + 9], 12, -1958414417);
c = ff(c, d, a, b, x[i + 10], 17, -42063);
b = ff(b, c, d, a, x[i + 11], 22, -1990404162);
a = ff(a, b, c, d, x[i + 12], 7, 1804603682);
d = ff(d, a, b, c, x[i + 13], 12, -40341101);
c = ff(c, d, a, b, x[i + 14], 17, -1502002290);
b = ff(b, c, d, a, x[i + 15], 22, 1236535329);
a = gg(a, b, c, d, x[i + 1], 5, -165796510);
d = gg(d, a, b, c, x[i + 6], 9, -1069501632);
c = gg(c, d, a, b, x[i + 11], 14, 643717713);
b = gg(b, c, d, a, x[i + 0], 20, -373897302);
a = gg(a, b, c, d, x[i + 5], 5, -701558691);
d = gg(d, a, b, c, x[i + 10], 9, 38016083);
c = gg(c, d, a, b, x[i + 15], 14, -660478335);
b = gg(b, c, d, a, x[i + 4], 20, -405537848);
a = gg(a, b, c, d, x[i + 9], 5, 568446438);
d = gg(d, a, b, c, x[i + 14], 9, -1019803690);
c = gg(c, d, a, b, x[i + 3], 14, -187363961);
b = gg(b, c, d, a, x[i + 8], 20, 1163531501);
a = gg(a, b, c, d, x[i + 13], 5, -1444681467);
d = gg(d, a, b, c, x[i + 2], 9, -51403784);
c = gg(c, d, a, b, x[i + 7], 14, 1735328473);
b = gg(b, c, d, a, x[i + 12], 20, -1926607734);
a = hh(a, b, c, d, x[i + 5], 4, -378558);
d = hh(d, a, b, c, x[i + 8], 11, -2022574463);
c = hh(c, d, a, b, x[i + 11], 16, 1839030562);
b = hh(b, c, d, a, x[i + 14], 23, -35309556);
a = hh(a, b, c, d, x[i + 1], 4, -1530992060);
d = hh(d, a, b, c, x[i + 4], 11, 1272893353);
c = hh(c, d, a, b, x[i + 7], 16, -155497632);
b = hh(b, c, d, a, x[i + 10], 23, -1094730640);
a = hh(a, b, c, d, x[i + 13], 4, 681279174);
d = hh(d, a, b, c, x[i + 0], 11, -358537222);
c = hh(c, d, a, b, x[i + 3], 16, -722521979);
b = hh(b, c, d, a, x[i + 6], 23, 76029189);
a = hh(a, b, c, d, x[i + 9], 4, -640364487);
d = hh(d, a, b, c, x[i + 12], 11, -421815835);
c = hh(c, d, a, b, x[i + 15], 16, 530742520);
b = hh(b, c, d, a, x[i + 2], 23, -995338651);
a = ii(a, b, c, d, x[i + 0], 6, -198630844);
d = ii(d, a, b, c, x[i + 7], 10, 1126891415);
c = ii(c, d, a, b, x[i + 14], 15, -1416354905);
b = ii(b, c, d, a, x[i + 5], 21, -57434055);
a = ii(a, b, c, d, x[i + 12], 6, 1700485571);
d = ii(d, a, b, c, x[i + 3], 10, -1894986606);
c = ii(c, d, a, b, x[i + 10], 15, -1051523);
b = ii(b, c, d, a, x[i + 1], 21, -2054922799);
a = ii(a, b, c, d, x[i + 8], 6, 1873313359);
d = ii(d, a, b, c, x[i + 15], 10, -30611744);
c = ii(c, d, a, b, x[i + 6], 15, -1560198380);
b = ii(b, c, d, a, x[i + 13], 21, 1309151649);
a = ii(a, b, c, d, x[i + 4], 6, -145523070);
d = ii(d, a, b, c, x[i + 11], 10, -1120210379);
c = ii(c, d, a, b, x[i + 2], 15, 718787259);
b = ii(b, c, d, a, x[i + 9], 21, -343485551);
a = ad(a, olda);
b = ad(b, oldb);
c = ad(c, oldc);
d = ad(d, oldd);
}
return (rh(a) + rh(b) + rh(c) + rh(d));
}