createLocalJWTSet throws Unsupported "alg" value for a JSON Web Key Set

[tnqzh123]

I want to import a JWK Set and create a key repository from local json, which contains one EdDSA private key with public key and one RSA public key. I tried jose.createLocalJWTSet but it throws JOSENotSupported: Unsupported "alg" value for a JSON Web Key Set error.

Here's the code:

let jwks = jose.createLocalJWKSet(JSON.parse(readFileSync('jwks/jwks.json', 'ascii'));
console.log(await jwks()) // Just check what's inside

The jwks/jwks.json:

{
    "keys": [
        {
            "crv": "Ed25519",
            "d": "-cdzpj03IklApYAMK6_XclLUTlJ0hrf_uaZudb4o_VI",
            "x": "Eg7eFX5rI7_xhDTvrv5LA7op1xdQ1NwMORr9CPadVNQ",
            "kty": "OKP",
            "alg": "EdDSA",
            "use": "sig",
            "kid": "111111"
        },
        {
            "kty": "RSA",
            "n": "sd-lDSZtBp38z6JqB1hIDXsGFCBA6bNPecbKEdCygW_h4K4AdSNYAfNaYCJqOfq-JKHMeIL69MKp7MG8D9pXyzcuHoL0XNhB3clJacU_ypGjiwCUsOKVxxLKElzBk6Ehelci7JS_HMNIKcwYWgfVy-85N7dT604VYxU5LT_Mps1CLpAXLt8No-RDn-RXnm5ekG5pSzDWkQMrrS6oNWR4hdOSk8vlNSFTKoKhZL5HRyxhfHV-WV70KMXsFci9eq8mUI8ikqbZq3vmyvcH2y9l7wJxwfXdOy8aFI4Hs1Go4-FXFlWnBlrBJhCi_SGlZtVfreV1tDlxqXK-2HFOsG-gnr0UlI79GpC_aRdNl28JU2PbgWo7ILdsMo1URYWEgXl1A-IMlN2Y2RLzp7T0Tu9hO6nUWjL5b9-dt38rheA_S0r_McHgL6WpOs8Qtmwy_5vU248BkrSktOBf5GFFTK7Te-b6w-7ag0JC4w-MyDNuPkNIDXmcVtrQQhGXIwP6qgOWV5RKKls3_S-LOEUgy7UpZjsNDCw3qV8lyn0zr3Z2TRSLEodLRb6FaJLmlKe8KXk-tMK8uraxFHIsoT_QHfU_SHwQifiiEeRnPPy2NRdJueH6yx3YyG-35LPgPZiGI5ks5kBQr93KU6Vs6nx3ahi5mHXXM3T62y8KBIi2LgAWMNc",
            "e": "AQAB",
            "use": "sig",
            "alg": "RS256",
            "kid": "222222"
        }
    ]
}

(The Ed25519 private key is generated randomly and will not be used in production so it's OK to show here)

I've also tried import these two keys separately with jose.importJWK, and it seems working well.

So where the problem is? Please help. Thanks.

[panva]

console.log(await jwks()) // Just check what's inside

That's not the intended use of the function. Your JWKS is fine, actually use it in jwtVerify to see it working.

[tnqzh123]

But how can I get a specified key from the JWK to sign a token?

[panva]

That's not what this method is for. You sign a token with a privatekey CryptoKey or KeyObject instance as per the docs, there's no means to organize them in the module.