JWK Format KeyType = oct

[andezapriansyah]

Hello @dvsekhvalnov , how to make a jwk so that it can be included in the JWT. Encode ini .net core? i used code var secretKey = new Jwk(secret); Still an error occurs in the jwk key,

jwk format i expected like this : {"kty":"oct","k":"Fdh9u8rINxfivbria1JKVT1u232VQBZYKx1HGAGPABa"}

[dvsekhvalnov]

Hey @andezapriansyah ,

you can serialize key to IDictionary for instance and then include as extraHeaders to encode: https://github.com/dvsekhvalnov/jose-jwt#reading-jwk https://github.com/dvsekhvalnov/jose-jwt#adding-extra-headers

something like:

var secretKey = new Jwk(secret);
var headers = new Dictionary<string, object>()
{
     { "key", secretKey.ToDictionary() },
};

string token = Jose.JWT.Encode(payload, ...... , extraHeaders: headers);

or if you can serialize JWK to json string directly: yourkey.ToJson(JWT.DefaultSettings.JsonMapper);

[andezapriansyah]

the secret must be a byte[] ? that I have is a string

i tried to change it from string to byte but got an error : AesKeyWrap management algorithm expected key of size 256 bits, but was given 344 bits

this is my code: string secret = "QvIP2QTvOk4O0rYx4a9In1WMB9P4KIxzULdVtZceScu"; byte[] secretKey = Encoding.UTF8.GetBytes(secret); string token = JWT.Encode(payloads, secretKey, JweAlgorithm.A256KW, JweEncryption.A256CBC_HS512, JweCompression.DEF);

[dvsekhvalnov]

Not sure, how it is related to Jwk?

For encrypting token, key can take variety of formats, see here: https://github.com/dvsekhvalnov/jose-jwt#creating-encrypted-tokens

for AesKeyWrap it will expect byte[] array.

[andezapriansyah]

thanks a lot, it's working. with code like this :

Jwk publicKey = Jwk.FromDictionary(new Dictionary<string, object>()
{
    {"kty", "oct"},
    {"k", "[secret]"}
});

[dvsekhvalnov]

ok ) feel free to close if no more questions.