use hacl_star_sys as ffi;
use crate::And;
pub const KEY_LENGTH: usize = 32;
pub const NONCE_LENGTH: usize = 8;
pub const BLOCK_LENGTH: usize = 64;
pub type Salsa20<'a> = And<&'a Key, &'a Nonce>;
define!{
pub struct Key/key(pub [u8; KEY_LENGTH]);
pub struct Nonce/nonce(pub [u8; NONCE_LENGTH]);
}
impl Key {
#[allow(clippy::trivially_copy_pass_by_ref)]
#[inline]
pub fn nonce<'a>(&'a self, n: &'a [u8; NONCE_LENGTH]) -> Salsa20<'a> {
And(self, nonce(n))
}
}
impl<'a> Salsa20<'a> {
pub fn process(self, buf: &mut [u8]) {
unsafe {
ffi::salsa20::Hacl_Salsa20_salsa20(
buf.as_mut_ptr(),
buf.as_ptr() as _,
buf.len() as _,
(self.0).0.as_ptr() as _,
(self.1).0.as_ptr() as _,
0
);
}
}
pub fn process_ic(self, ctr: u64, input: &[u8], output: &mut [u8]) {
assert!(output.len() >= input.len());
unsafe {
ffi::salsa20::Hacl_Salsa20_salsa20(
output.as_mut_ptr(),
input.as_ptr() as _,
input.len() as _,
(self.0).0.as_ptr() as _,
(self.1).0.as_ptr() as _,
ctr
);
}
}
}
pub fn hasalsa20(output: &mut [u8; 32], key: &[u8; KEY_LENGTH], nonce: &[u8; 16]) {
unsafe {
ffi::salsa20::Hacl_Salsa20_hsalsa20(
output.as_mut_ptr(),
nonce.as_ptr() as _,
key.as_ptr() as _
);
}
}