imba/polyfills/crypto/esm/lib/public-encrypt/mgf.js

Intuitive and powerful language for building webapps that fly

import createHash from "../create-hash";
function i2ops(c) {
    var out = Buffer.allocUnsafe(4);
    out.writeUInt32BE(c, 0);
    return out;
}
export default (function (seed, len) {
    var t = Buffer.alloc(0);
    var i = 0;
    var c;
    while (t.length < len) {
        c = i2ops(i++);
        t = Buffer.concat([t, createHash('sha1').update(seed).update(c).digest()]);
    }
    return t.slice(0, len);
});