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use crate::result::*;
use core::mem as cmem;
pub trait RandomGenerator {
fn random_bytes(&mut self, buf: *mut u8, size: usize) -> Result<()>;
fn random<T: Copy + Default>(&mut self) -> Result<T> {
let mut t: T = Default::default();
self.random_bytes(&mut t as *mut _ as *mut u8, cmem::size_of::<T>())?;
Ok(t)
}
}
use crate::ipc::sf;
use crate::service;
use crate::service::spl;
use crate::service::spl::IRandomInterface;
use crate::mem;
pub struct SplCsrngGenerator {
csrng: mem::Shared<dyn IRandomInterface>
}
impl SplCsrngGenerator {
pub fn new() -> Result<Self> {
let csrng = service::new_service_object::<spl::RandomInterface>()?;
Ok(Self { csrng })
}
}
impl RandomGenerator for SplCsrngGenerator {
fn random_bytes(&mut self, buf: *mut u8, size: usize) -> Result<()> {
self.csrng.get().generate_random_bytes(sf::Buffer::from_mut_ptr(buf, size))
}
}