💭 TypeError: Key for the RSA-OAEP-256 algorithm must be one of type CryptoKey... when using jose + react-native-quick-crypto in Expo app

[leleofg]

Hi there! 👋

I'm trying to use jose along with react-native-quick-crypto to encrypt a string using a JWK received from my backend.

Environment

• Expo (Managed Workflow) with Expo Dev Client
• react-native-quick-crypto installed via:

  expo install react-native-quick-crypto

• Native build generated using eas build
• At the entry point (App.js), I’m calling:

  import { install } from 'react-native-quick-crypto';
  install();

Code

import { CompactEncrypt, importJWK } from 'jose';

const ALG = 'RSA-OAEP-256';

export async function encryptValue(value: string): Promise<string> {
  try {
    const response = await fetch('https://example.com/jwks.json');
    const { keys } = await response.json();

    const publicKey = await importJWK(keys[0]); // <- this returns a CryptoKey

    const plaintext = new TextEncoder().encode(value);

    const encryptedValue = await new CompactEncrypt(plaintext)
      .setProtectedHeader({ alg: ALG, enc: 'A256GCM' })
      .encrypt(publicKey); // <- this throws an error

    return encryptedValue;
  } catch (err) {
    console.error('Error encrypting value:', err);
    return '';
  }
}

Error

TypeError: Key for the RSA-OAEP-256 algorithm must be one of type CryptoKey, KeyObject, or JSON Web Key. Received an instance of CryptoKey

It seems like importJWK() is returning a CryptoKey, but CompactEncrypt().encrypt() is rejecting it.

What I’ve tried

• Confirmed that react-native-quick-crypto is installed and initialized correctly
• Verified the JWK is valid and works fine in a Node.js environment
• Tried using importJWK(jwk, ALG) explicitly — same result

Question

Is this a compatibility issue between jose and react-native-quick-crypto in a React Native + Expo environment?
Should I be using a different key format or conversion?

Any help would be greatly appreciated! 🙏

What I tried

QuickCrypto Version

0.7.13

Additional information

• I am using Expo
• I have read the Troubleshooting Guide
• I agree to follow this project's Code of Conduct
• I searched for similar questions in the issues page as well as in the discussions page and found none.

[machiapply]

@leleofg did you find a solution? i think i am facing a similar issue

[boorad]

dupe of #681