Add CryptoApi.setDeviceVerified (#3624)

I need a way to mark devices as trusted for the backup tests.

spec/unit/rust-crypto/rust-crypto.spec.ts

@@ -23,6 +23,8 @@ import { RustCrypto } from "../../../src/rust-crypto/rust-crypto";
 import { initRustCrypto } from "../../../src/rust-crypto";
 import {
     CryptoEvent,
+    Device,
+    DeviceVerification,
     HttpApiEvent,
     HttpApiEventHandlerMap,
     IHttpOpts,
@@ -351,6 +353,60 @@ describe("RustCrypto", () => {
         });
     });
 
+    describe("setDeviceVerified", () => {
+        let rustCrypto: RustCrypto;
+
+        async function getTestDevice(): Promise<Device> {
+            const devices = await rustCrypto.getUserDeviceInfo([testData.TEST_USER_ID]);
+            return devices.get(testData.TEST_USER_ID)!.get(testData.TEST_DEVICE_ID)!;
+        }
+
+        beforeEach(async () => {
+            rustCrypto = await makeTestRustCrypto(
+                new MatrixHttpApi(new TypedEventEmitter<HttpApiEvent, HttpApiEventHandlerMap>(), {
+                    baseUrl: "http://server/",
+                    prefix: "",
+                    onlyData: true,
+                }),
+                testData.TEST_USER_ID,
+            );
+
+            fetchMock.post("path:/_matrix/client/v3/keys/upload", { one_time_key_counts: {} });
+            fetchMock.post("path:/_matrix/client/v3/keys/query", {
+                device_keys: {
+                    [testData.TEST_USER_ID]: {
+                        [testData.TEST_DEVICE_ID]: testData.SIGNED_TEST_DEVICE_DATA,
+                    },
+                },
+            });
+            // call onSyncCompleted to kick off the outgoingRequestLoop and download the device list.
+            rustCrypto.onSyncCompleted({});
+
+            // before the call, the device should be unverified.
+            const device = await getTestDevice();
+            expect(device.verified).toEqual(DeviceVerification.Unverified);
+        });
+
+        it("should throw an error for an unknown device", async () => {
+            await expect(rustCrypto.setDeviceVerified(testData.TEST_USER_ID, "xxy")).rejects.toThrow("Unknown device");
+        });
+
+        it("should mark an unverified device as verified", async () => {
+            await rustCrypto.setDeviceVerified(testData.TEST_USER_ID, testData.TEST_DEVICE_ID);
+
+            // and confirm that the device is now verified
+            expect((await getTestDevice()).verified).toEqual(DeviceVerification.Verified);
+        });
+
+        it("should mark a verified device as unverified", async () => {
+            await rustCrypto.setDeviceVerified(testData.TEST_USER_ID, testData.TEST_DEVICE_ID);
+            expect((await getTestDevice()).verified).toEqual(DeviceVerification.Verified);
+
+            await rustCrypto.setDeviceVerified(testData.TEST_USER_ID, testData.TEST_DEVICE_ID, false);
+            expect((await getTestDevice()).verified).toEqual(DeviceVerification.Unverified);
+        });
+    });
+
     describe("getDeviceVerificationStatus", () => {
         let rustCrypto: RustCrypto;
         let olmMachine: Mocked<RustSdkCryptoJs.OlmMachine>;

src/crypto-api.ts

@@ -137,6 +137,22 @@ export interface CryptoApi {
      */
     getDeviceVerificationStatus(userId: string, deviceId: string): Promise<DeviceVerificationStatus | null>;
 
+    /**
+     * Mark the given device as locally verified.
+     *
+     * Marking a devices as locally verified has much the same effect as completing the verification dance, or receiving
+     * a cross-signing signature for it.
+     *
+     * @param userId - owner of the device
+     * @param deviceId - unique identifier for the device.
+     * @param verified - whether to mark the device as verified. Defaults to 'true'.
+     *
+     * @throws an error if the device is unknown, or has not published any encryption keys.
+     *
+     * @remarks Fires {@link CryptoEvent#DeviceVerificationChanged}
+     */
+    setDeviceVerified(userId: string, deviceId: string, verified?: boolean): Promise<void>;
+
     /**
      * Checks whether cross signing:
      * - is enabled on this account and trusted by this device

src/crypto/index.ts

@@ -2174,6 +2174,15 @@ export class Crypto extends TypedEventEmitter<CryptoEvent, CryptoEventHandlerMap
         return this.deviceList.saveIfDirty(delay);
     }
 
+    /**
+     * Mark the given device as locally verified.
+     *
+     * Implementation of {@link CryptoApi#setDeviceVerified}.
+     */
+    public async setDeviceVerified(userId: string, deviceId: string, verified = true): Promise<void> {
+        await this.setDeviceVerification(userId, deviceId, verified);
+    }
+
     /**
      * Update the blocked/verified state of the given device
      *

src/rust-crypto/rust-crypto.ts

@@ -377,6 +377,23 @@ export class RustCrypto extends TypedEventEmitter<RustCryptoEvents, RustCryptoEv
         //  events. Maybe we need to do the same?
     }
 
+    /**
+     * Mark the given device as locally verified.
+     *
+     * Implementation of {@link CryptoApi#setDeviceVerified}.
+     */
+    public async setDeviceVerified(userId: string, deviceId: string, verified = true): Promise<void> {
+        const device: RustSdkCryptoJs.Device | undefined = await this.olmMachine.getDevice(
+            new RustSdkCryptoJs.UserId(userId),
+            new RustSdkCryptoJs.DeviceId(deviceId),
+        );
+
+        if (!device) {
+            throw new Error(`Unknown device ${userId}|${deviceId}`);
+        }
+        await device.setLocalTrust(verified ? RustSdkCryptoJs.LocalTrust.Verified : RustSdkCryptoJs.LocalTrust.Unset);
+    }
+
     /**
      * Implementation of {@link CryptoApi#getDeviceVerificationStatus}.
      */