Fix send rotation broken due to incorrect types (#14874)

Author: quexten

libs/common/src/tools/send/services/send.service.spec.ts

@@ -477,11 +477,9 @@ describe("SendService", () => {
     let encryptedKey: EncString;
 
     beforeEach(() => {
-      encryptService.unwrapSymmetricKey.mockResolvedValue(
-        new SymmetricCryptoKey(new Uint8Array(32)),
-      );
+      encryptService.decryptBytes.mockResolvedValue(new Uint8Array(16));
       encryptedKey = new EncString("Re-encrypted Send Key");
-      encryptService.wrapSymmetricKey.mockResolvedValue(encryptedKey);
+      encryptService.encryptBytes.mockResolvedValue(encryptedKey);
     });
 
     it("returns re-encrypted user sends", async () => {

libs/common/src/tools/send/services/send.service.ts

@@ -292,8 +292,9 @@ export class SendService implements InternalSendServiceAbstraction {
   ) {
     const requests = await Promise.all(
       sends.map(async (send) => {
-        const sendKey = await this.encryptService.unwrapSymmetricKey(send.key, originalUserKey);
-        send.key = await this.encryptService.wrapSymmetricKey(sendKey, rotateUserKey);
+        // Send key is not a key but a 16 byte seed used to derive the key
+        const sendKey = await this.encryptService.decryptBytes(send.key, originalUserKey);
+        send.key = await this.encryptService.encryptBytes(sendKey, rotateUserKey);
         return new SendWithIdRequest(send);
       }),
     );