Add file for string converters

cryptonote_utils/str_bin_converters.ts

@@ -0,0 +1,24 @@
+export function strtobin(str: string) {
+	const res = new Uint8Array(str.length);
+	for (let i = 0; i < str.length; i++) {
+		res[i] = str.charCodeAt(i);
+	}
+	return res;
+}
+
+export function bintohex(bin: Uint8Array) {
+	const out = [];
+	for (let i = 0; i < bin.length; ++i) {
+		out.push(("0" + bin[i].toString(16)).slice(-2));
+	}
+	return out.join("");
+}
+
+export function hextobin(hex: string) {
+	if (hex.length % 2 !== 0) throw "Hex string has invalid length!";
+	var res = new Uint8Array(hex.length / 2);
+	for (var i = 0; i < hex.length / 2; ++i) {
+		res[i] = parseInt(hex.slice(i * 2, i * 2 + 2), 16);
+	}
+	return res;
+}