rename: client -> frontend

packages/frontend/src/scripts/2fa.ts

@@ -0,0 +1,33 @@
+export function byteify(string: string, encoding: 'ascii' | 'base64' | 'hex') {
+	switch (encoding) {
+		case 'ascii':
+			return Uint8Array.from(string, c => c.charCodeAt(0));
+		case 'base64':
+			return Uint8Array.from(
+				atob(
+					string
+						.replace(/-/g, '+')
+						.replace(/_/g, '/'),
+				),
+				c => c.charCodeAt(0),
+			);
+		case 'hex':
+			return new Uint8Array(
+				string
+					.match(/.{1,2}/g)
+					.map(byte => parseInt(byte, 16)),
+			);
+	}
+}
+
+export function hexify(buffer: ArrayBuffer) {
+	return Array.from(new Uint8Array(buffer))
+		.reduce(
+			(str, byte) => str + byte.toString(16).padStart(2, '0'),
+			'',
+		);
+}
+
+export function stringify(buffer: ArrayBuffer) {
+	return String.fromCharCode(... new Uint8Array(buffer));
+}