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use crate::{raw, RawError, Softdevice};
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub enum RandomError {
BufferTooBig,
NotEnoughEntropy,
Raw(RawError),
}
impl From<RawError> for RandomError {
fn from(err: RawError) -> Self {
Self::Raw(err)
}
}
/// Get cryptographically-securerandom bytes.
pub fn random_bytes(_sd: &Softdevice, buf: &mut [u8]) -> Result<(), RandomError> {
if buf.len() > u8::MAX as usize {
return Err(RandomError::BufferTooBig);
}
let ret = unsafe { raw::sd_rand_application_vector_get(buf[..].as_mut_ptr(), buf.len() as u8) };
match RawError::convert(ret) {
Ok(()) => Ok(()),
Err(RawError::SocRandNotEnoughValues) => Err(RandomError::NotEnoughEntropy),
Err(e) => Err(e.into()),
}
}
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