// Convert dice to base6 entropy (ie 1-6 to 0-5)
// This is done by changing all 6s to 0s
if (base.str == "dice") {
- var newRawEntropyStr = "";
- for (var i=0; i<rawEntropyStr.length; i++) {
- var c = rawEntropyStr[i];
+ var newParts = [];
+ var newInts = [];
+ for (var i=0; i<base.parts.length; i++) {
+ var c = base.parts[i];
if ("12345".indexOf(c) > -1) {
- newRawEntropyStr += c;
+ newParts[i] = base.parts[i];
+ newInts[i] = base.ints[i];
}
else {
- newRawEntropyStr += "0";
+ newParts[i] = "0";
+ newInts[i] = 0;
}
}
- rawEntropyStr = newRawEntropyStr;
base.str = "base 6 (dice)";
- base.parts = matchers.base6(rawEntropyStr);
+ base.ints = newInts;
+ base.parts = newParts;
base.matcher = matchers.base6;
}
// Detect empty entropy
if (base.ints.length == 0) {
return {
binaryStr: binLeadingZeros,
- cleanStr: leadingZeros,
+ cleanStr: leadingZeros.join(""),
base: base,
}
}
// If the first integer is small, it must be padded with zeros.
// Otherwise the chance of the first bit being 1 is 100%, which is
// obviously incorrect.
- // This is not perfect for unusual bases, eg base 6 has 2.6 bits, so is
- // slightly biased toward having leading zeros, but it's still better
- // than ignoring it completely.
- // TODO: revise this, it seems very fishy. For example, in base 10, there are
- // 8 opportunities to start with 0 but only 2 to start with 1
- var firstInt = base.ints[0];
- var firstIntBits = Math.floor(Math.log2(firstInt))+1;
- var maxFirstIntBits = Math.floor(Math.log2(base.asInt-1))+1;
- var missingFirstIntBits = maxFirstIntBits - firstIntBits;
- var firstIntLeadingZeros = "";
- for (var i=0; i<missingFirstIntBits; i++) {
- binLeadingZeros += "0";
+ // This is not perfect for unusual bases, so is only done for bases
+ // of 2^n, eg octal or hexadecimal
+ if (base.asInt == 16) {
+ var firstInt = base.ints[0];
+ var firstIntBits = firstInt.toString(2).length;
+ var maxFirstIntBits = (base.asInt-1).toString(2).length;
+ var missingFirstIntBits = maxFirstIntBits - firstIntBits;
+ for (var i=0; i<missingFirstIntBits; i++) {
+ binLeadingZeros += "0";
+ }
}
// Convert base.ints to BigInteger.
// Due to using unusual bases, eg cards of base52, this is not as simple as
// Convert entropy to different formats
var entropyBin = binLeadingZeros + entropyInt.toString(2);
var entropyClean = base.parts.join("");
+ if (base.asInt == 52) {
+ entropyClean = base.parts.join(" ").toUpperCase();
+ entropyClean = entropyClean.replace(/C/g, "\u2663");
+ entropyClean = entropyClean.replace(/D/g, "\u2666");
+ entropyClean = entropyClean.replace(/H/g, "\u2665");
+ entropyClean = entropyClean.replace(/S/g, "\u2660");
+ }
var e = {
binaryStr: entropyBin,
cleanStr: entropyClean,