BF.JS, Javascript - rextester

BF.JS

var letters = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"];

var debug = true;
var s1;
var s2;
var thehash;

var salt1;
var salt2;

var totalcount = 0;
var match = false;

function doPhraseCheck(phrase, remainingIterations, excludeSpaces) {
    console.log("Start search...");
    match = false;
    totalcount = 0;
    thehash = document.getElementById("ppHash").value;
    salt1 = fromhex_chksum(document.getElementById("ppSalt1").value);
    salt2 = fromhex_chksum(document.getElementById("ppSalt2").value);
    checkPhraseRecursive(phrase, remainingIterations-1, excludeSpaces);
    if(!match) {
        document.getElementById('result').innerHTML = "No match found!";
        console.log("Match found!");
    }
    console.log("Search finished! Number of tests: "+totalcount);
}

function checkPhraseRecursive(phrase, remainingIterations, excludeSpaces) {
    logMessage("Iterations: " +remainingIterations);
    var sp = phrase.split("");
    for (var i = 0; i < sp.length; i++) {
        if (sp[i] == " " && excludeSpaces) //exclude spaces, if you think the general pattern of the phrase was correct
            continue;
        var originalSp = sp[i];
        for (var j = 0; j < letters.length; j++) {
            sp[i] = letters[j];
            var st = sp.join("");
            if(remainingIterations > 0) {
                checkPhraseRecursive(st, remainingIterations-1, excludeSpaces);
            }
            logMessage(st + " " + totalcount);
            totalcount++;
            thestr = st;
            logMessage(thestr);
            checked = check_pass(thestr);

if (checked == 1) {
                logMessage("Found!!!");
                logMessage(thestr);
                document.getElementById("result").innerHTML = "Phrase Match: "+thestr;
                match = true;
                break;
            }
        }
        if(match) break;
        sp[i] = originalSp;
    }
}

function logMessage(msg) {
    if (debug) {
        console.log(msg);
    }
}

/* Generate a checksum and prepend it to data, returns as hex */
function tohex_chksum(data) {
    if (typeof data == 'string') data = sodium.from_string(data);
    return sodium.crypto_generichash(4, data, '', 'hex') + sodium.to_hex(data);
}

/* Remove a checksum from the front of data, check if the data matches
 ** return the data if the checksum matches (as uint8array) or false
 ** if data does not match */
function fromhex_chksum(hex, format) {
    var chksum = hex.slice(0, 8);
    var payload = sodium.from_hex(hex.slice(8));
    if (sodium.crypto_generichash(4, payload, '', 'hex') != chksum) return false;
    if (format == 'string') return sodium.to_string(payload);
    return payload;
}

function check_pass(passphrase) {
    var pphash = sodium.crypto_pwhash_scryptsalsa208sha256(16,
        sodium.crypto_pwhash_scryptsalsa208sha256(16, passphrase,
            salt1, sodium.crypto_pwhash_OPSLIMIT_INTERACTIVE, sodium.crypto_pwhash_MEMLIMIT_INTERACTIVE),
        salt2, sodium.crypto_pwhash_OPSLIMIT_INTERACTIVE, sodium.crypto_pwhash_MEMLIMIT_INTERACTIVE);

passphrase = "";

pphash = tohex_chksum(pphash);
    if (pphash == thehash) {
        logMessage("validatePassphrase - correct");
        return 1;
    }
    logMessage("validatePassphrase - incorrect");
    return 0;
}


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