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use core::{convert::TryInto, fmt::Debug};
use digest::ExtendableOutput;
pub(crate) fn turbo_shake_test<D, F>(
input: &[u8],
output: &[u8],
truncate_output: usize,
new: F,
) -> Option<&'static str>
where
D: ExtendableOutput + Debug + Clone,
F: Fn() -> D,
{
let mut hasher = new();
let mut buf = [0u8; 16 * 1024];
let buf = &mut buf[..truncate_output + output.len()];
// Test that it works when accepting the message all at once
hasher.update(input);
let mut hasher2 = hasher.clone();
hasher.finalize_xof_into(buf);
if &buf[truncate_output..] != output {
return Some("whole message");
}
buf.iter_mut().for_each(|b| *b = 0);
// Test that it works when accepting the message in chunks
for n in 1..core::cmp::min(17, input.len()) {
let mut hasher = new();
for chunk in input.chunks(n) {
hasher.update(chunk);
hasher2.update(chunk);
}
hasher.finalize_xof_into(buf);
if &buf[truncate_output..] != output {
return Some("message in chunks");
}
buf.iter_mut().for_each(|b| *b = 0);
}
None
}
macro_rules! new_turbo_shake_test {
($name:ident, $test_name:expr, $hasher:ty, $hasher_core:ty, $test_func:ident $(,)?) => {
#[test]
fn $name() {
use digest::dev::blobby::Blob5Iterator;
let data = include_bytes!(concat!("data/", $test_name, ".blb"));
for (i, row) in Blob5Iterator::new(data).unwrap().enumerate() {
let [domain_separation, input, input_pattern_length, output, truncate_output] =
row.unwrap();
let input = if (input_pattern_length.len() == 0) {
input.to_vec()
} else if (input.len() == 0) {
let pattern_length =
u64::from_be_bytes(input_pattern_length.try_into().unwrap());
let mut input = Vec::<u8>::new();
for value in 0..pattern_length {
input.push((value % 0xFB).try_into().unwrap());
}
input
} else {
panic!(
"\
failed to read tests data\n\
input:\t{:02X?}\n\
input_pattern_length:\t{:02X?}\n",
input, input_pattern_length,
);
};
if let Some(desc) = $test_func(
&input,
output,
u64::from_be_bytes(truncate_output.try_into().unwrap())
.try_into()
.unwrap(),
|| <$hasher>::from_core(<$hasher_core>::new(domain_separation[0])),
) {
panic!(
"\n\
Failed test №{}: {}\n\
input:\t{:02X?}\n\
output:\t{:02X?}\n",
i, desc, &input, output,
);
}
}
}
};
}
new_turbo_shake_test!(
turboshake128,
"turboshake128",
sha3::TurboShake128,
sha3::TurboShake128Core,
turbo_shake_test,
);
new_turbo_shake_test!(
turboshake256,
"turboshake256",
sha3::TurboShake256,
sha3::TurboShake256Core,
turbo_shake_test,
);