[PM-5537] Biometric State Service (#7761)

* Create state for biometric client key halves

* Move enc string util to central utils

* Provide biometric state through service

* Use biometric state to track client key half

* Create migration for client key half

* Ensure client key half is removed on logout

* Remove account data for client key half

* Remove unnecessary key definition likes

* Remove moved state from account

* Fix null-conditional operator failure

* Simplify migration

* Remove lame test

* Fix test type

* Add migrator

* Prefer userKey when legacy not needed

* Fix tests

libs/common/src/state-migrations/migrations/14-move-biometric-client-key-half-state-to-providers.spec.ts

@@ -0,0 +1,123 @@
+import { MockProxy, any } from "jest-mock-extended";
+
+import { MigrationHelper } from "../migration-helper";
+import { mockMigrationHelper } from "../migration-helper.spec";
+
+import {
+  MoveBiometricClientKeyHalfToStateProviders,
+  CLIENT_KEY_HALF,
+} from "./14-move-biometric-client-key-half-state-to-providers";
+
+function exampleJSON() {
+  return {
+    global: {
+      otherStuff: "otherStuff1",
+    },
+    authenticatedAccounts: ["user-1", "user-2", "user-3"],
+    "user-1": {
+      keys: {
+        biometricEncryptionClientKeyHalf: "user1-key-half",
+        otherStuff: "overStuff2",
+      },
+      otherStuff: "otherStuff3",
+    },
+    "user-2": {
+      keys: {
+        otherStuff: "otherStuff4",
+      },
+      otherStuff: "otherStuff5",
+    },
+  };
+}
+
+function rollbackJSON() {
+  return {
+    "user_user-1_biometricSettings_clientKeyHalf": "user1-key-half",
+    global: {
+      otherStuff: "otherStuff1",
+    },
+    authenticatedAccounts: ["user-1", "user-2", "user-3"],
+    "user-1": {
+      keys: {
+        otherStuff: "overStuff2",
+      },
+      otherStuff: "otherStuff3",
+    },
+    "user-2": {
+      keys: {
+        otherStuff: "otherStuff4",
+      },
+      otherStuff: "otherStuff5",
+    },
+  };
+}
+
+describe("DesktopBiometricState migrator", () => {
+  let helper: MockProxy<MigrationHelper>;
+  let sut: MoveBiometricClientKeyHalfToStateProviders;
+
+  describe("migrate", () => {
+    beforeEach(() => {
+      helper = mockMigrationHelper(exampleJSON(), 13);
+      sut = new MoveBiometricClientKeyHalfToStateProviders(13, 14);
+    });
+
+    it("should remove biometricEncryptionClientKeyHalf from all accounts", async () => {
+      await sut.migrate(helper);
+      expect(helper.set).toHaveBeenCalledTimes(1);
+      expect(helper.set).toHaveBeenCalledWith("user-1", {
+        keys: {
+          otherStuff: "overStuff2",
+        },
+        otherStuff: "otherStuff3",
+      });
+    });
+
+    it("should set biometricEncryptionClientKeyHalf value for account that have it", async () => {
+      await sut.migrate(helper);
+
+      expect(helper.setToUser).toHaveBeenCalledWith("user-1", CLIENT_KEY_HALF, "user1-key-half");
+    });
+
+    it("should not call extra setToUser", async () => {
+      await sut.migrate(helper);
+
+      expect(helper.setToUser).toHaveBeenCalledTimes(1);
+    });
+  });
+
+  describe("rollback", () => {
+    beforeEach(() => {
+      helper = mockMigrationHelper(rollbackJSON(), 14);
+      sut = new MoveBiometricClientKeyHalfToStateProviders(13, 14);
+    });
+
+    it("should null out new values", async () => {
+      await sut.rollback(helper);
+
+      expect(helper.setToUser).toHaveBeenCalledWith("user-1", CLIENT_KEY_HALF, null);
+    });
+
+    it("should add explicit value back to accounts", async () => {
+      await sut.rollback(helper);
+
+      expect(helper.set).toHaveBeenCalledTimes(1);
+      expect(helper.set).toHaveBeenCalledWith("user-1", {
+        keys: {
+          biometricEncryptionClientKeyHalf: "user1-key-half",
+          otherStuff: "overStuff2",
+        },
+        otherStuff: "otherStuff3",
+      });
+    });
+
+    it.each(["user-2", "user-3"])(
+      "should not try to restore values to missing accounts",
+      async (userId) => {
+        await sut.rollback(helper);
+
+        expect(helper.set).not.toHaveBeenCalledWith(userId, any());
+      },
+    );
+  });
+});

libs/common/src/state-migrations/migrations/14-move-biometric-client-key-half-state-to-providers.ts

@@ -0,0 +1,65 @@
+import { KeyDefinitionLike, MigrationHelper } from "../migration-helper";
+import { Migrator } from "../migrator";
+
+type ExpectedAccountType = {
+  settings?: {
+    disableAutoBiometricsPrompt?: boolean;
+    biometricUnlock?: boolean;
+    dismissedBiometricRequirePasswordOnStartCallout?: boolean;
+  };
+  keys?: { biometricEncryptionClientKeyHalf?: string };
+};
+
+// Biometric text, no auto prompt text, fingerprint validated, and prompt cancelled are refreshed on every app start, so we don't need to migrate them
+export const CLIENT_KEY_HALF: KeyDefinitionLike = {
+  key: "clientKeyHalf",
+  stateDefinition: { name: "biometricSettings" },
+};
+
+export class MoveBiometricClientKeyHalfToStateProviders extends Migrator<13, 14> {
+  async migrate(helper: MigrationHelper): Promise<void> {
+    const legacyAccounts = await helper.getAccounts<ExpectedAccountType>();
+
+    await Promise.all(
+      legacyAccounts.map(async ({ userId, account }) => {
+        // Move account data
+        if (account?.keys?.biometricEncryptionClientKeyHalf != null) {
+          await helper.setToUser(
+            userId,
+            CLIENT_KEY_HALF,
+            account.keys.biometricEncryptionClientKeyHalf,
+          );
+
+          // Delete old account data
+          delete account?.keys?.biometricEncryptionClientKeyHalf;
+          await helper.set(userId, account);
+        }
+      }),
+    );
+  }
+
+  async rollback(helper: MigrationHelper): Promise<void> {
+    async function rollbackUser(userId: string, account: ExpectedAccountType) {
+      let updatedAccount = false;
+
+      const userKeyHalf = await helper.getFromUser<string>(userId, CLIENT_KEY_HALF);
+
+      if (userKeyHalf) {
+        account ??= {};
+        account.keys ??= {};
+
+        updatedAccount = true;
+        account.keys.biometricEncryptionClientKeyHalf = userKeyHalf;
+        await helper.setToUser(userId, CLIENT_KEY_HALF, null);
+      }
+
+      if (updatedAccount) {
+        await helper.set(userId, account);
+      }
+    }
+
+    const accounts = await helper.getAccounts<ExpectedAccountType>();
+
+    await Promise.all(accounts.map(({ userId, account }) => rollbackUser(userId, account)));
+  }
+}