brute force identicon - Githubissues

// https://github.com/stewartlord/identicon.js/blob/4fad7cafec1b7a4d896015e084e861625ef5d64f/identicon.js#L80
// 11111 00100 00100
// getIdenticon("skotz-", "101101011111111", 1000000)

// code = 15 character string representing 25 pixel image
// 1 = solid, 0 = white
// 10 05 00 05 10 
// 11 06 01 06 11 
// 12 07 02 07 12 
// 13 08 03 08 13 
// 14 09 04 09 14 

var getIdenticon = function (base, code, attempts = 1000000) {
    var best = 0;
    var bestName = "";
    for (var j = 0; j < attempts; j++) {
        var name = base + Math.random().toString().replace("0.", "");
        var hash = sha256(name);
        var sim = 0;
        for (i = 0; i < 15; i++) {
            var color = parseInt(hash.charAt(i), 16) % 2 ? 0 : 1;
            if (color == code[i]) {
                sim++;
            }
        }
        if (sim > best) {
            best = sim;
            bestName = name;
        }
        if (sim >= 15) {
            console.log("iterations: " + j);
            console.log("username: " + bestName);
            return;
        }
    }
};

getIdenticon("skotz-", "101101011111111")
skotz / effort-vue

brute force identicon #38
