WebAuthnでログインできないのを修正 (#6327)

Resolve #6319

src/client/scripts/2fa.ts

@@ -1,5 +1,33 @@
-export function hexifyAB(buffer) {
-	return Array.from(new Uint8Array(buffer))
-		.map(item => item.toString(16).padStart(2, '0'))
-		.join('');
+export function byteify(data: string, encoding: 'ascii' | 'base64' | 'hex') {
+	switch (encoding) {
+		case 'ascii':
+			return Uint8Array.from(data, c => c.charCodeAt(0));
+		case 'base64':
+			return Uint8Array.from(
+				atob(
+					data
+						.replace(/-/g, '+')
+						.replace(/_/g, '/')
+				),
+				c => c.charCodeAt(0)
+			);
+		case 'hex':
+			return new Uint8Array(
+				data
+					.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));
 }