feat(pwa): add base

packages/storage/src/browserSecure.ts

@@ -0,0 +1,40 @@
+import { getDatabaseEntry } from "@tensamin/shared/indexedDb";
+
+type SecureEnvelope = {
+  __tensaminSecure: 1;
+  version: 1;
+  iv: string;
+  data: string;
+};
+
+function base64ToBytes(value: string) {
+  const binary = atob(value);
+  return Uint8Array.from(binary, (character) => character.charCodeAt(0));
+}
+
+function isSecureEnvelope(value: unknown): value is SecureEnvelope {
+  if (!value || typeof value !== "object") return false;
+  const envelope = value as Partial<SecureEnvelope>;
+  return (
+    envelope.__tensaminSecure === 1 &&
+    envelope.version === 1 &&
+    typeof envelope.iv === "string" &&
+    typeof envelope.data === "string"
+  );
+}
+
+export async function loadSecureBrowserValue<T>(key: string) {
+  const stored = await getDatabaseEntry<unknown>("storage", key);
+  if (stored === undefined || !isSecureEnvelope(stored)) {
+    return stored as T | undefined;
+  }
+
+  const masterKey = await getDatabaseEntry<CryptoKey>("keys", "master-v1");
+  if (!masterKey) throw new Error("Secure storage key is unavailable.");
+  const plaintext = await crypto.subtle.decrypt(
+    { name: "AES-GCM", iv: base64ToBytes(stored.iv) },
+    masterKey,
+    base64ToBytes(stored.data),
+  );
+  return JSON.parse(new TextDecoder().decode(plaintext)) as T;
+}

packages/storage/src/context.tsx

@@ -30,7 +30,7 @@ import {
 
 export type SaveOptions = { secure?: boolean };
 
-interface StorageContextValue {
+export interface StorageContextValue {
   load<K extends keyof StorageSchema>(key: K): Promise<StorageSchema[K]>;
   save<K extends keyof StorageSchema>(
     key: K,

packages/storage/src/credentials.ts

@@ -0,0 +1,68 @@
+import { invoke, isTauri } from "@tauri-apps/api/core";
+
+import type { StorageContextValue } from "./context";
+
+export function parseTuFileContent(rawFileContent: string): {
+  userId: number;
+  privateKey: string;
+  domain: string | null;
+} {
+  const content = rawFileContent.trim();
+  const separator = content.indexOf("::");
+  if (separator <= 0 || separator !== content.lastIndexOf("::")) {
+    throw new Error("Invalid file");
+  }
+
+  const identity = content.slice(0, separator);
+  const privateKey = content.slice(separator + 2).trim();
+  const [userIdValue, domain, ...extraDomainParts] = identity.split("@");
+  const userId = Number(userIdValue);
+  if (
+    !Number.isSafeInteger(userId) ||
+    userId <= 0 ||
+    !privateKey ||
+    extraDomainParts.length > 0 ||
+    (identity.includes("@") && !domain)
+  ) {
+    throw new Error("Invalid file");
+  }
+
+  return { userId, privateKey, domain: domain ?? null };
+}
+
+export async function persistMtpCredentials({
+  storage,
+  userId,
+  keyring,
+  domain,
+}: {
+  storage: Pick<StorageContextValue, "load" | "save">;
+  userId: number;
+  keyring: string;
+  domain?: string | null;
+}) {
+  const omegaUrl = domain
+    ? `https://${domain}/`
+    : await storage.load("omega_url");
+  if (domain) await storage.save("omega_url", omegaUrl);
+
+  if (isTauri()) {
+    const [forcedOmikronUrl, forcedOmikronPublicKey] = await Promise.all([
+      storage.load("forced_omikron_url"),
+      storage.load("forced_omikron_public_key"),
+    ]);
+    await invoke("mtp_store_credentials", {
+      config: {
+        userId,
+        keyring,
+        omegaUrl,
+        forcedOmikronUrl,
+        forcedOmikronPublicKey,
+      },
+    });
+  }
+
+  await storage.save("mtp_keyring", keyring, { secure: true });
+  await storage.save("session_id", Date.now());
+  await storage.save("user_id", userId);
+}

packages/storage/src/secure.ts

@@ -4,10 +4,7 @@ import { getDatabaseEntry, setDatabaseEntry } from "@tensamin/shared/indexedDb";
 
 export type SecureStorageStatus = {
   backend:
-    | "electron-keyring"
-    | "application-storage"
-    | "webcrypto"
-    | "indexeddb";
+    "electron-keyring" | "application-storage" | "webcrypto" | "indexeddb";
   secure: boolean;
   reason?: string;
 };
@@ -71,7 +68,12 @@ async function getKey() {
     if (!globalThis.crypto?.subtle || typeof indexedDB === "undefined") {
       return null;
     }
-    if (window.tensaminDesktop?.secureStorage) return loadElectronKey();
+    if (
+      typeof window !== "undefined" &&
+      window.tensaminDesktop?.secureStorage
+    ) {
+      return loadElectronKey();
+    }
     return loadBrowserKey();
   })().catch(() => null);
   return keyPromise;
@@ -120,7 +122,10 @@ export async function decodeSecureValue(value: unknown): Promise<unknown> {
 }
 
 export async function getSecureStorageStatus(): Promise<SecureStorageStatus> {
-  const desktop = window.tensaminDesktop?.secureStorage;
+  const desktop =
+    typeof window === "undefined"
+      ? undefined
+      : window.tensaminDesktop?.secureStorage;
   if (desktop?.getStatus) {
     const status = await desktop.getStatus();
     if (status.available) return { backend: "electron-keyring", secure: true };