navigator, utils

apps/login/utils/base64.ts

@@ -0,0 +1,63 @@
+export function coerceToBase64Url(thing: any, name: string) {
+  // Array or ArrayBuffer to Uint8Array
+  if (Array.isArray(thing)) {
+    thing = Uint8Array.from(thing);
+  }
+
+  if (thing instanceof ArrayBuffer) {
+    thing = new Uint8Array(thing);
+  }
+
+  // Uint8Array to base64
+  if (thing instanceof Uint8Array) {
+    var str = "";
+    var len = thing.byteLength;
+
+    for (var i = 0; i < len; i++) {
+      str += String.fromCharCode(thing[i]);
+    }
+    thing = window.btoa(str);
+  }
+
+  if (typeof thing !== "string") {
+    throw new Error("could not coerce '" + name + "' to string");
+  }
+
+  // base64 to base64url
+  // NOTE: "=" at the end of challenge is optional, strip it off here
+  thing = thing.replace(/\+/g, "-").replace(/\//g, "_").replace(/=*$/g, "");
+
+  return thing;
+}
+
+export function coerceToArrayBuffer(thing: any, name: string) {
+  if (typeof thing === "string") {
+    // base64url to base64
+    thing = thing.replace(/-/g, "+").replace(/_/g, "/");
+
+    // base64 to Uint8Array
+    var str = window.atob(thing);
+    var bytes = new Uint8Array(str.length);
+    for (var i = 0; i < str.length; i++) {
+      bytes[i] = str.charCodeAt(i);
+    }
+    thing = bytes;
+  }
+
+  // Array to Uint8Array
+  if (Array.isArray(thing)) {
+    thing = new Uint8Array(thing);
+  }
+
+  // Uint8Array to ArrayBuffer
+  if (thing instanceof Uint8Array) {
+    thing = thing.buffer;
+  }
+
+  // error if none of the above worked
+  if (!(thing instanceof ArrayBuffer)) {
+    throw new TypeError("could not coerce '" + name + "' to ArrayBuffer");
+  }
+
+  return thing;
+}