feat(mobile): crypto + secret-store + session-storage adapters

2026-05-13 23:55:07 +02:00
parent a275703ba6
commit 7ac93a95e6
3 changed files with 55 additions and 0 deletions
@@ -0,0 +1,20 @@
+import { Buffer } from 'buffer';
+import * as SecureStore from 'expo-secure-store';
+import type { SecretStore } from '@chat-app/shared/auth';
+
+// SecretStore contract uses Uint8Array values; SecureStore only takes
+// strings, so we base64 at the boundary. iOS Keychain max value size
+// is generous (a few MB); private keys are 32 bytes so we are well
+// within limits.
+export const secretStore: SecretStore = {
+  async getSecret(key) {
+    const v = await SecureStore.getItemAsync(key);
+    return v ? new Uint8Array(Buffer.from(v, 'base64')) : null;
+  },
+  async setSecret(key, value) {
+    await SecureStore.setItemAsync(key, Buffer.from(value).toString('base64'));
+  },
+  async removeSecret(key) {
+    await SecureStore.deleteItemAsync(key);
+  },
+};