Different behaviour for signature on Desktop / Android

[TheBlusky]

I use the following code in order to sign data:

static public byte[] sign(byte[] data, PrivateKey privateKey, int saltLength) throws Exception {
        Signature instance = Signature.getInstance("SHA256withRSA/PSS", provider);
        MGF1ParameterSpec mgf1ParameterSpec = new MGF1ParameterSpec("SHA-256");
        PSSParameterSpec pssParameterSpec = new PSSParameterSpec("SHA-256", "MGF1",mgf1ParameterSpec , saltLength, 1);
        instance.setParameter(pssParameterSpec);
        instance.initSign(privateKey);
        instance.update(data);
        return instance.sign();
}

(The code is very similar for checking sign)

On desktop (with BC or SC), the code is working fine, and signature can be checked with other platform (tested with python, node, ...).

On Android, the "saltLength" is not read, and is forced to 32bits, so I can't sign / verify signature from device on other platform if another "saltLength" is used. (I verified it by brute-forcing saltLength value on desktop).

I really don't know how to debug it, the very same Java code has different behavior between launched on desktop or Android. Any idea how to force "saltLength" on Android ?

Thanks in advance !