fn convert_fixed_signature(
alg: &'static AlgorithmID,
signature: &[u8],
) -> Result<(ManagedPointer<*mut u8>, usize), Unspecified>fn convert_fixed_signature(
alg: &'static AlgorithmID,
signature: &[u8],
) -> Result<(ManagedPointer<*mut u8>, usize), Unspecified>