Function rsa::algorithms::mgf1_xor_digest

pub fn mgf1_xor_digest<D>(out: &mut [u8], digest: &mut D, seed: &[u8])where
    D: Digest + FixedOutputReset,

Mask generation function.

Panics if out is larger than 2**32. This is in accordance with RFC 8017 - PKCS #1 B.2.1