None of the following functions can be called with the arguments supplied.

[ItSNeverLate]

Hello everyone, I could not use this fun signature! Any idea?

.signWith(privateKey, Jwts.SIG.RS512)

` val kf = KeyFactory.getInstance("RSA")
val pkcs8EncodedKeySpec = PKCS8EncodedKeySpec(accessKeyBase64.decodeBase64Bytes())
val privateKey: Key = kf.generatePrivate(pkcs8EncodedKeySpec)
val calendar = Calendar.getInstance()

    return Jwts.builder()
        .claims(payload)
        .issuedAt(calendar.time)
        .expiration(calendar.apply { add(Calendar.SECOND, expiresInSeconds) }.time)
        .header().add("typ", "JWT").add(headers)
        .and()
        // TODO: .signWith(privateKey) -> RSA256? should be checked by backend
        .signWith(privateKey, SignatureAlgorithm.RS512)
        .compact()`

other signatures work, but:
.signWith(privateKey, SignatureAlgorithm.RS512) --> is deprecated
.signWith(privateKey) --> uses RS256 while I need RS512

None of the following functions can be called with the arguments supplied.
signWith(TypeVariable(K)!, SecureDigestAlgorithm<in TypeVariable(K)!, *>!)   where K = TypeVariable(K) for   fun <K : Key!> signWith(key: K!, alg: SecureDigestAlgorithm<in K!, *>!): JwtBuilder! defined in io. jsonwebtoken. JwtBuilder
signWith(SignatureAlgorithm!, Key!) defined in io. jsonwebtoken. JwtBuilder
signWith(SignatureAlgorithm!, ByteArray!) defined in io. jsonwebtoken. JwtBuilder
signWith(SignatureAlgorithm!, String!) defined in io. jsonwebtoken. JwtBuilder
signWith(Key!, SignatureAlgorithm!) defined in io. jsonwebtoken. JwtBuilder

[lhazlewood]

Hi @ItSNeverLate !

...
.signWith(privateKey, SignatureAlgorithm.RS512)
.compact()

should be:

...
.signWith(privateKey, Jwts.SIG.RS512) // <-- Jwts.SIG.RS512
.compact()

The .signWith method signature requires that key specified must be compatible with the paired SignatureAlgorithm instance. As such, the type of key required by Jwts.SIG.RS512 must be a PrivateKey, but it looks like you've typed val privateKey to be just a Key (and not a PrivateKey as required).

I think that's the issue - let us know!