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test.rs
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test.rs
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use crate::{CVBytes, CVWords, IncrementCounter, BLOCK_LEN, CHUNK_LEN, OUT_LEN};
use arrayref::array_ref;
use arrayvec::ArrayVec;
use core::usize;
use rand::prelude::*;
// Interesting input lengths to run tests on.
pub const TEST_CASES: &[usize] = &[
0,
1,
2,
3,
4,
5,
6,
7,
8,
BLOCK_LEN - 1,
BLOCK_LEN,
BLOCK_LEN + 1,
2 * BLOCK_LEN - 1,
2 * BLOCK_LEN,
2 * BLOCK_LEN + 1,
CHUNK_LEN - 1,
CHUNK_LEN,
CHUNK_LEN + 1,
2 * CHUNK_LEN,
2 * CHUNK_LEN + 1,
3 * CHUNK_LEN,
3 * CHUNK_LEN + 1,
4 * CHUNK_LEN,
4 * CHUNK_LEN + 1,
5 * CHUNK_LEN,
5 * CHUNK_LEN + 1,
6 * CHUNK_LEN,
6 * CHUNK_LEN + 1,
7 * CHUNK_LEN,
7 * CHUNK_LEN + 1,
8 * CHUNK_LEN,
8 * CHUNK_LEN + 1,
16 * CHUNK_LEN, // AVX512's bandwidth
31 * CHUNK_LEN, // 16 + 8 + 4 + 2 + 1
100 * CHUNK_LEN, // subtrees larger than MAX_SIMD_DEGREE chunks
];
pub const TEST_CASES_MAX: usize = 100 * CHUNK_LEN;
// There's a test to make sure these two are equal below.
pub const TEST_KEY: CVBytes = *b"whats the Elvish word for friend";
pub const TEST_KEY_WORDS: CVWords = [
1952540791, 1752440947, 1816469605, 1752394102, 1919907616, 1868963940, 1919295602, 1684956521,
];
// Paint the input with a repeating byte pattern. We use a cycle length of 251,
// because that's the largest prime number less than 256. This makes it
// unlikely to swapping any two adjacent input blocks or chunks will give the
// same answer.
pub fn paint_test_input(buf: &mut [u8]) {
for (i, b) in buf.iter_mut().enumerate() {
*b = (i % 251) as u8;
}
}
type CompressInPlaceFn =
unsafe fn(cv: &mut CVWords, block: &[u8; BLOCK_LEN], block_len: u8, counter: u64, flags: u8);
type CompressXofFn = unsafe fn(
cv: &CVWords,
block: &[u8; BLOCK_LEN],
block_len: u8,
counter: u64,
flags: u8,
) -> [u8; 64];
// A shared helper function for platform-specific tests.
pub fn test_compress_fn(compress_in_place_fn: CompressInPlaceFn, compress_xof_fn: CompressXofFn) {
let initial_state = TEST_KEY_WORDS;
let block_len: u8 = 61;
let mut block = [0; BLOCK_LEN];
paint_test_input(&mut block[..block_len as usize]);
// Use a counter with set bits in both 32-bit words.
let counter = (5u64 << 32) + 6;
let flags = crate::CHUNK_END | crate::ROOT | crate::KEYED_HASH;
let portable_out =
crate::portable::compress_xof(&initial_state, &block, block_len, counter as u64, flags);
let mut test_state = initial_state;
unsafe { compress_in_place_fn(&mut test_state, &block, block_len, counter as u64, flags) };
let test_state_bytes = crate::platform::le_bytes_from_words_32(&test_state);
let test_xof =
unsafe { compress_xof_fn(&initial_state, &block, block_len, counter as u64, flags) };
assert_eq!(&portable_out[..32], &test_state_bytes[..]);
assert_eq!(&portable_out[..], &test_xof[..]);
}
type HashManyFn<A> = unsafe fn(
inputs: &[&A],
key: &CVWords,
counter: u64,
increment_counter: IncrementCounter,
flags: u8,
flags_start: u8,
flags_end: u8,
out: &mut [u8],
);
// A shared helper function for platform-specific tests.
pub fn test_hash_many_fn(
hash_many_chunks_fn: HashManyFn<[u8; CHUNK_LEN]>,
hash_many_parents_fn: HashManyFn<[u8; 2 * OUT_LEN]>,
) {
// Test a few different initial counter values.
// - 0: The base case.
// - u32::MAX: The low word of the counter overflows for all inputs except the first.
// - i32::MAX: *No* overflow. But carry bugs in tricky SIMD code can screw this up, if you XOR
// when you're supposed to ANDNOT...
let initial_counters = [0, u32::MAX as u64, i32::MAX as u64];
for counter in initial_counters {
#[cfg(feature = "std")]
dbg!(counter);
// 31 (16 + 8 + 4 + 2 + 1) inputs
const NUM_INPUTS: usize = 31;
let mut input_buf = [0; CHUNK_LEN * NUM_INPUTS];
crate::test::paint_test_input(&mut input_buf);
// First hash chunks.
let mut chunks = ArrayVec::<&[u8; CHUNK_LEN], NUM_INPUTS>::new();
for i in 0..NUM_INPUTS {
chunks.push(array_ref!(input_buf, i * CHUNK_LEN, CHUNK_LEN));
}
let mut portable_chunks_out = [0; NUM_INPUTS * OUT_LEN];
crate::portable::hash_many(
&chunks,
&TEST_KEY_WORDS,
counter,
IncrementCounter::Yes,
crate::KEYED_HASH,
crate::CHUNK_START,
crate::CHUNK_END,
&mut portable_chunks_out,
);
let mut test_chunks_out = [0; NUM_INPUTS * OUT_LEN];
unsafe {
hash_many_chunks_fn(
&chunks[..],
&TEST_KEY_WORDS,
counter,
IncrementCounter::Yes,
crate::KEYED_HASH,
crate::CHUNK_START,
crate::CHUNK_END,
&mut test_chunks_out,
);
}
for n in 0..NUM_INPUTS {
#[cfg(feature = "std")]
dbg!(n);
assert_eq!(
&portable_chunks_out[n * OUT_LEN..][..OUT_LEN],
&test_chunks_out[n * OUT_LEN..][..OUT_LEN]
);
}
// Then hash parents.
let mut parents = ArrayVec::<&[u8; 2 * OUT_LEN], NUM_INPUTS>::new();
for i in 0..NUM_INPUTS {
parents.push(array_ref!(input_buf, i * 2 * OUT_LEN, 2 * OUT_LEN));
}
let mut portable_parents_out = [0; NUM_INPUTS * OUT_LEN];
crate::portable::hash_many(
&parents,
&TEST_KEY_WORDS,
counter,
IncrementCounter::No,
crate::KEYED_HASH | crate::PARENT,
0,
0,
&mut portable_parents_out,
);
let mut test_parents_out = [0; NUM_INPUTS * OUT_LEN];
unsafe {
hash_many_parents_fn(
&parents[..],
&TEST_KEY_WORDS,
counter,
IncrementCounter::No,
crate::KEYED_HASH | crate::PARENT,
0,
0,
&mut test_parents_out,
);
}
for n in 0..NUM_INPUTS {
#[cfg(feature = "std")]
dbg!(n);
assert_eq!(
&portable_parents_out[n * OUT_LEN..][..OUT_LEN],
&test_parents_out[n * OUT_LEN..][..OUT_LEN]
);
}
}
}
#[test]
fn test_key_bytes_equal_key_words() {
assert_eq!(
TEST_KEY_WORDS,
crate::platform::words_from_le_bytes_32(&TEST_KEY),
);
}
#[test]
fn test_reference_impl_size() {
// Because the Rust compiler optimizes struct layout, it's possible that
// some future version of the compiler will produce a different size. If
// that happens, we can either disable this test, or test for multiple
// expected values. For now, the purpose of this test is to make sure we
// notice if that happens.
assert_eq!(1880, core::mem::size_of::<reference_impl::Hasher>());
}
#[test]
fn test_counter_words() {
let counter: u64 = (1 << 32) + 2;
assert_eq!(crate::counter_low(counter), 2);
assert_eq!(crate::counter_high(counter), 1);
}
#[test]
fn test_largest_power_of_two_leq() {
let input_output = &[
// The zero case is nonsensical, but it does work.
(0, 1),
(1, 1),
(2, 2),
(3, 2),
(4, 4),
(5, 4),
(6, 4),
(7, 4),
(8, 8),
// the largest possible usize
(usize::MAX, (usize::MAX >> 1) + 1),
];
for &(input, output) in input_output {
assert_eq!(
output,
crate::largest_power_of_two_leq(input),
"wrong output for n={}",
input
);
}
}
#[test]
fn test_left_len() {
let input_output = &[
(CHUNK_LEN + 1, CHUNK_LEN),
(2 * CHUNK_LEN - 1, CHUNK_LEN),
(2 * CHUNK_LEN, CHUNK_LEN),
(2 * CHUNK_LEN + 1, 2 * CHUNK_LEN),
(4 * CHUNK_LEN - 1, 2 * CHUNK_LEN),
(4 * CHUNK_LEN, 2 * CHUNK_LEN),
(4 * CHUNK_LEN + 1, 4 * CHUNK_LEN),
];
for &(input, output) in input_output {
assert_eq!(crate::left_len(input), output);
}
}
#[test]
fn test_compare_reference_impl() {
const OUT: usize = 303; // more than 64, not a multiple of 4
let mut input_buf = [0; TEST_CASES_MAX];
paint_test_input(&mut input_buf);
for &case in TEST_CASES {
let input = &input_buf[..case];
#[cfg(feature = "std")]
dbg!(case);
// regular
{
let mut reference_hasher = reference_impl::Hasher::new();
reference_hasher.update(input);
let mut expected_out = [0; OUT];
reference_hasher.finalize(&mut expected_out);
// all at once
let test_out = crate::hash(input);
assert_eq!(test_out, *array_ref!(expected_out, 0, 32));
// incremental
let mut hasher = crate::Hasher::new();
hasher.update(input);
assert_eq!(hasher.finalize(), *array_ref!(expected_out, 0, 32));
assert_eq!(hasher.finalize(), test_out);
// incremental (rayon)
#[cfg(feature = "rayon")]
{
let mut hasher = crate::Hasher::new();
hasher.update_rayon(input);
assert_eq!(hasher.finalize(), *array_ref!(expected_out, 0, 32));
assert_eq!(hasher.finalize(), test_out);
}
// xof
let mut extended = [0; OUT];
hasher.finalize_xof().fill(&mut extended);
assert_eq!(extended, expected_out);
}
// keyed
{
let mut reference_hasher = reference_impl::Hasher::new_keyed(&TEST_KEY);
reference_hasher.update(input);
let mut expected_out = [0; OUT];
reference_hasher.finalize(&mut expected_out);
// all at once
let test_out = crate::keyed_hash(&TEST_KEY, input);
assert_eq!(test_out, *array_ref!(expected_out, 0, 32));
// incremental
let mut hasher = crate::Hasher::new_keyed(&TEST_KEY);
hasher.update(input);
assert_eq!(hasher.finalize(), *array_ref!(expected_out, 0, 32));
assert_eq!(hasher.finalize(), test_out);
// incremental (rayon)
#[cfg(feature = "rayon")]
{
let mut hasher = crate::Hasher::new_keyed(&TEST_KEY);
hasher.update_rayon(input);
assert_eq!(hasher.finalize(), *array_ref!(expected_out, 0, 32));
assert_eq!(hasher.finalize(), test_out);
}
// xof
let mut extended = [0; OUT];
hasher.finalize_xof().fill(&mut extended);
assert_eq!(extended, expected_out);
}
// derive_key
{
let context = "BLAKE3 2019-12-27 16:13:59 example context (not the test vector one)";
let mut reference_hasher = reference_impl::Hasher::new_derive_key(context);
reference_hasher.update(input);
let mut expected_out = [0; OUT];
reference_hasher.finalize(&mut expected_out);
// all at once
let test_out = crate::derive_key(context, input);
assert_eq!(test_out, expected_out[..32]);
// incremental
let mut hasher = crate::Hasher::new_derive_key(context);
hasher.update(input);
assert_eq!(hasher.finalize(), *array_ref!(expected_out, 0, 32));
assert_eq!(hasher.finalize(), *array_ref!(test_out, 0, 32));
// incremental (rayon)
#[cfg(feature = "rayon")]
{
let mut hasher = crate::Hasher::new_derive_key(context);
hasher.update_rayon(input);
assert_eq!(hasher.finalize(), *array_ref!(expected_out, 0, 32));
assert_eq!(hasher.finalize(), *array_ref!(test_out, 0, 32));
}
// xof
let mut extended = [0; OUT];
hasher.finalize_xof().fill(&mut extended);
assert_eq!(extended, expected_out);
}
}
}
fn reference_hash(input: &[u8]) -> crate::Hash {
let mut hasher = reference_impl::Hasher::new();
hasher.update(input);
let mut bytes = [0; 32];
hasher.finalize(&mut bytes);
bytes.into()
}
#[test]
fn test_compare_update_multiple() {
// Don't use all the long test cases here, since that's unnecessarily slow
// in debug mode.
let mut short_test_cases = TEST_CASES;
while *short_test_cases.last().unwrap() > 4 * CHUNK_LEN {
short_test_cases = &short_test_cases[..short_test_cases.len() - 1];
}
assert_eq!(*short_test_cases.last().unwrap(), 4 * CHUNK_LEN);
let mut input_buf = [0; 2 * TEST_CASES_MAX];
paint_test_input(&mut input_buf);
for &first_update in short_test_cases {
#[cfg(feature = "std")]
dbg!(first_update);
let first_input = &input_buf[..first_update];
let mut test_hasher = crate::Hasher::new();
test_hasher.update(first_input);
for &second_update in short_test_cases {
#[cfg(feature = "std")]
dbg!(second_update);
let second_input = &input_buf[first_update..][..second_update];
let total_input = &input_buf[..first_update + second_update];
// Clone the hasher with first_update bytes already written, so
// that the next iteration can reuse it.
let mut test_hasher = test_hasher.clone();
test_hasher.update(second_input);
let expected = reference_hash(total_input);
assert_eq!(expected, test_hasher.finalize());
}
}
}
#[test]
fn test_fuzz_hasher() {
const INPUT_MAX: usize = 4 * CHUNK_LEN;
let mut input_buf = [0; 3 * INPUT_MAX];
paint_test_input(&mut input_buf);
// Don't do too many iterations in debug mode, to keep the tests under a
// second or so. CI should run tests in release mode also. Provide an
// environment variable for specifying a larger number of fuzz iterations.
let num_tests = if cfg!(debug_assertions) { 100 } else { 10_000 };
// Use a fixed RNG seed for reproducibility.
let mut rng = rand_chacha::ChaCha8Rng::from_seed([1; 32]);
for _num_test in 0..num_tests {
#[cfg(feature = "std")]
dbg!(_num_test);
let mut hasher = crate::Hasher::new();
let mut total_input = 0;
// For each test, write 3 inputs of random length.
for _ in 0..3 {
let input_len = rng.gen_range(0..(INPUT_MAX + 1));
#[cfg(feature = "std")]
dbg!(input_len);
let input = &input_buf[total_input..][..input_len];
hasher.update(input);
total_input += input_len;
}
let expected = reference_hash(&input_buf[..total_input]);
assert_eq!(expected, hasher.finalize());
}
}
#[test]
fn test_xof_seek() {
let mut out = [0; 533];
let mut hasher = crate::Hasher::new();
hasher.update(b"foo");
hasher.finalize_xof().fill(&mut out);
assert_eq!(hasher.finalize().as_bytes(), &out[0..32]);
let mut reader = hasher.finalize_xof();
reader.set_position(303);
let mut out2 = [0; 102];
reader.fill(&mut out2);
assert_eq!(&out[303..][..102], &out2[..]);
#[cfg(feature = "std")]
{
use std::io::prelude::*;
let mut reader = hasher.finalize_xof();
reader.seek(std::io::SeekFrom::Start(303)).unwrap();
let mut out3 = Vec::new();
reader.by_ref().take(102).read_to_end(&mut out3).unwrap();
assert_eq!(&out[303..][..102], &out3[..]);
assert_eq!(
reader.seek(std::io::SeekFrom::Current(0)).unwrap(),
303 + 102
);
reader.seek(std::io::SeekFrom::Current(-5)).unwrap();
assert_eq!(
reader.seek(std::io::SeekFrom::Current(0)).unwrap(),
303 + 102 - 5
);
let mut out4 = [0; 17];
assert_eq!(reader.read(&mut out4).unwrap(), 17);
assert_eq!(&out[303 + 102 - 5..][..17], &out4[..]);
assert_eq!(
reader.seek(std::io::SeekFrom::Current(0)).unwrap(),
303 + 102 - 5 + 17
);
assert!(reader.seek(std::io::SeekFrom::End(0)).is_err());
assert!(reader.seek(std::io::SeekFrom::Current(-1000)).is_err());
}
}
#[test]
fn test_msg_schedule_permutation() {
let permutation = [2, 6, 3, 10, 7, 0, 4, 13, 1, 11, 12, 5, 9, 14, 15, 8];
let mut generated = [[0; 16]; 7];
generated[0] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
for round in 1..7 {
for i in 0..16 {
generated[round][i] = generated[round - 1][permutation[i]];
}
}
assert_eq!(generated, crate::MSG_SCHEDULE);
}
#[test]
fn test_reset() {
let mut hasher = crate::Hasher::new();
hasher.update(&[42; 3 * CHUNK_LEN + 7]);
hasher.reset();
hasher.update(&[42; CHUNK_LEN + 3]);
assert_eq!(hasher.finalize(), crate::hash(&[42; CHUNK_LEN + 3]));
let key = &[99; crate::KEY_LEN];
let mut keyed_hasher = crate::Hasher::new_keyed(key);
keyed_hasher.update(&[42; 3 * CHUNK_LEN + 7]);
keyed_hasher.reset();
keyed_hasher.update(&[42; CHUNK_LEN + 3]);
assert_eq!(
keyed_hasher.finalize(),
crate::keyed_hash(key, &[42; CHUNK_LEN + 3]),
);
let context = "BLAKE3 2020-02-12 10:20:58 reset test";
let mut kdf = crate::Hasher::new_derive_key(context);
kdf.update(&[42; 3 * CHUNK_LEN + 7]);
kdf.reset();
kdf.update(&[42; CHUNK_LEN + 3]);
let expected = crate::derive_key(context, &[42; CHUNK_LEN + 3]);
assert_eq!(kdf.finalize(), expected);
}
#[test]
fn test_hex_encoding_decoding() {
let digest_str = "04e0bb39f30b1a3feb89f536c93be15055482df748674b00d26e5a75777702e9";
let mut hasher = crate::Hasher::new();
hasher.update(b"foo");
let digest = hasher.finalize();
assert_eq!(digest.to_hex().as_str(), digest_str);
#[cfg(feature = "std")]
assert_eq!(digest.to_string(), digest_str);
// Test round trip
let digest = crate::Hash::from_hex(digest_str).unwrap();
assert_eq!(digest.to_hex().as_str(), digest_str);
// Test uppercase
let digest = crate::Hash::from_hex(digest_str.to_uppercase()).unwrap();
assert_eq!(digest.to_hex().as_str(), digest_str);
// Test string parsing via FromStr
let digest: crate::Hash = digest_str.parse().unwrap();
assert_eq!(digest.to_hex().as_str(), digest_str);
// Test errors
let bad_len = "04e0bb39f30b1";
let _result = crate::Hash::from_hex(bad_len).unwrap_err();
#[cfg(feature = "std")]
assert_eq!(_result.to_string(), "expected 64 hex bytes, received 13");
let bad_char = "Z4e0bb39f30b1a3feb89f536c93be15055482df748674b00d26e5a75777702e9";
let _result = crate::Hash::from_hex(bad_char).unwrap_err();
#[cfg(feature = "std")]
assert_eq!(_result.to_string(), "invalid hex character: 'Z'");
let _result = crate::Hash::from_hex([128; 64]).unwrap_err();
#[cfg(feature = "std")]
assert_eq!(_result.to_string(), "invalid hex character: 0x80");
}
// This test is a mimized failure case for the Windows SSE2 bug described in
// https://github.com/BLAKE3-team/BLAKE3/issues/206.
//
// Before that issue was fixed, this test would fail on Windows in the following configuration:
//
// cargo test --features=no_avx512,no_avx2,no_sse41 --release
//
// Bugs like this one (stomping on a caller's register) are very sensitive to the details of
// surrounding code, so it's not especially likely that this test will catch another bug (or even
// the same bug) in the future. Still, there's no harm in keeping it.
#[test]
fn test_issue_206_windows_sse2() {
// This stupid loop has to be here to trigger the bug. I don't know why.
for _ in &[0] {
// The length 65 (two blocks) is significant. It doesn't repro with 64 (one block). It also
// doesn't repro with an all-zero input.
let input = &[0xff; 65];
let expected_hash = [
183, 235, 50, 217, 156, 24, 190, 219, 2, 216, 176, 255, 224, 53, 28, 95, 57, 148, 179,
245, 162, 90, 37, 121, 0, 142, 219, 62, 234, 204, 225, 161,
];
// This throwaway call has to be here to trigger the bug.
crate::Hasher::new().update(input);
// This assert fails when the bug is triggered.
assert_eq!(crate::Hasher::new().update(input).finalize(), expected_hash);
}
}
#[test]
fn test_hash_conversions() {
let bytes1 = [42; 32];
let hash1: crate::Hash = bytes1.into();
let bytes2: [u8; 32] = hash1.into();
assert_eq!(bytes1, bytes2);
let bytes3 = *hash1.as_bytes();
assert_eq!(bytes1, bytes3);
let hash2 = crate::Hash::from_bytes(bytes1);
assert_eq!(hash1, hash2);
let hex = hash1.to_hex();
let hash3 = crate::Hash::from_hex(hex.as_bytes()).unwrap();
assert_eq!(hash1, hash3);
}
#[test]
const fn test_hash_const_conversions() {
let bytes = [42; 32];
let hash = crate::Hash::from_bytes(bytes);
_ = hash.as_bytes();
}
#[cfg(feature = "zeroize")]
#[test]
fn test_zeroize() {
use zeroize::Zeroize;
let mut hash = crate::Hash([42; 32]);
hash.zeroize();
assert_eq!(hash.0, [0u8; 32]);
let mut hasher = crate::Hasher {
chunk_state: crate::ChunkState {
cv: [42; 8],
chunk_counter: 42,
buf: [42; 64],
buf_len: 42,
blocks_compressed: 42,
flags: 42,
platform: crate::Platform::Portable,
},
key: [42; 8],
cv_stack: [[42; 32]; { crate::MAX_DEPTH + 1 }].into(),
};
hasher.zeroize();
assert_eq!(hasher.chunk_state.cv, [0; 8]);
assert_eq!(hasher.chunk_state.chunk_counter, 0);
assert_eq!(hasher.chunk_state.buf, [0; 64]);
assert_eq!(hasher.chunk_state.buf_len, 0);
assert_eq!(hasher.chunk_state.blocks_compressed, 0);
assert_eq!(hasher.chunk_state.flags, 0);
assert!(matches!(
hasher.chunk_state.platform,
crate::Platform::Portable
));
assert_eq!(hasher.key, [0; 8]);
assert_eq!(&*hasher.cv_stack, &[[0u8; 32]; 0]);
let mut output_reader = crate::OutputReader {
inner: crate::Output {
input_chaining_value: [42; 8],
block: [42; 64],
counter: 42,
block_len: 42,
flags: 42,
platform: crate::Platform::Portable,
},
position_within_block: 42,
};
output_reader.zeroize();
assert_eq!(output_reader.inner.input_chaining_value, [0; 8]);
assert_eq!(output_reader.inner.block, [0; 64]);
assert_eq!(output_reader.inner.counter, 0);
assert_eq!(output_reader.inner.block_len, 0);
assert_eq!(output_reader.inner.flags, 0);
assert!(matches!(
output_reader.inner.platform,
crate::Platform::Portable
));
assert_eq!(output_reader.position_within_block, 0);
}
#[test]
#[cfg(feature = "std")]
fn test_update_reader() -> Result<(), std::io::Error> {
// This is a brief test, since update_reader() is mostly a wrapper around update(), which already
// has substantial testing.
let mut input = vec![0; 1_000_000];
paint_test_input(&mut input);
assert_eq!(
crate::Hasher::new().update_reader(&input[..])?.finalize(),
crate::hash(&input),
);
Ok(())
}
#[test]
#[cfg(feature = "std")]
fn test_update_reader_interrupted() -> std::io::Result<()> {
use std::io;
struct InterruptingReader<'a> {
already_interrupted: bool,
slice: &'a [u8],
}
impl<'a> InterruptingReader<'a> {
fn new(slice: &'a [u8]) -> Self {
Self {
already_interrupted: false,
slice,
}
}
}
impl<'a> io::Read for InterruptingReader<'a> {
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
if !self.already_interrupted {
self.already_interrupted = true;
return Err(io::Error::from(io::ErrorKind::Interrupted));
}
let take = std::cmp::min(self.slice.len(), buf.len());
buf[..take].copy_from_slice(&self.slice[..take]);
self.slice = &self.slice[take..];
Ok(take)
}
}
let input = b"hello world";
let mut reader = InterruptingReader::new(input);
let mut hasher = crate::Hasher::new();
hasher.update_reader(&mut reader)?;
assert_eq!(hasher.finalize(), crate::hash(input));
Ok(())
}
#[test]
#[cfg(feature = "mmap")]
// NamedTempFile isn't Miri-compatible
#[cfg(not(miri))]
fn test_mmap() -> Result<(), std::io::Error> {
// This is a brief test, since update_mmap() is mostly a wrapper around update(), which already
// has substantial testing.
use std::io::prelude::*;
let mut input = vec![0; 1_000_000];
paint_test_input(&mut input);
let mut tempfile = tempfile::NamedTempFile::new()?;
tempfile.write_all(&input)?;
tempfile.flush()?;
assert_eq!(
crate::Hasher::new()
.update_mmap(tempfile.path())?
.finalize(),
crate::hash(&input),
);
Ok(())
}
#[test]
#[cfg(feature = "mmap")]
#[cfg(target_os = "linux")]
fn test_mmap_virtual_file() -> Result<(), std::io::Error> {
// Virtual files like /proc/version can't be mmapped, because their contents don't actually
// exist anywhere in memory. Make sure we fall back to regular file IO in these cases.
// Currently this is handled with a length check, where the assumption is that virtual files
// will always report length 0. If that assumption ever breaks, hopefully this test will catch
// it.
let virtual_filepath = "/proc/version";
let mut mmap_hasher = crate::Hasher::new();
// We'll fail right here if the fallback doesn't work.
mmap_hasher.update_mmap(virtual_filepath)?;
let mut read_hasher = crate::Hasher::new();
read_hasher.update_reader(std::fs::File::open(virtual_filepath)?)?;
assert_eq!(mmap_hasher.finalize(), read_hasher.finalize());
Ok(())
}
#[test]
#[cfg(feature = "mmap")]
#[cfg(feature = "rayon")]
// NamedTempFile isn't Miri-compatible
#[cfg(not(miri))]
fn test_mmap_rayon() -> Result<(), std::io::Error> {
// This is a brief test, since update_mmap_rayon() is mostly a wrapper around update_rayon(),
// which already has substantial testing.
use std::io::prelude::*;
let mut input = vec![0; 1_000_000];
paint_test_input(&mut input);
let mut tempfile = tempfile::NamedTempFile::new()?;
tempfile.write_all(&input)?;
tempfile.flush()?;
assert_eq!(
crate::Hasher::new()
.update_mmap_rayon(tempfile.path())?
.finalize(),
crate::hash(&input),
);
Ok(())
}
#[test]
#[cfg(feature = "std")]
#[cfg(feature = "serde")]
fn test_serde() {
let hash: crate::Hash = [7; 32].into();
let json = serde_json::to_string(&hash).unwrap();
assert_eq!(
json,
"[7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7]",
);
let hash2: crate::Hash = serde_json::from_str(&json).unwrap();
assert_eq!(hash, hash2);
}
// `cargo +nightly miri test` currently works, but it takes forever, because some of our test
// inputs are quite large. Most of our unsafe code is platform specific and incompatible with Miri
// anyway, but we'd like it to be possible for callers to run their own tests under Miri, assuming
// they don't use incompatible features like Rayon or mmap. This test should get reasonable
// coverage of our public API without using any large inputs, so we can run it in CI and catch
// obvious breaks. (For example, constant_time_eq is not compatible with Miri.)
#[test]
fn test_miri_smoketest() {
let mut hasher = crate::Hasher::new_derive_key("Miri smoketest");
hasher.update(b"foo");
#[cfg(feature = "std")]
hasher.update_reader(&b"bar"[..]).unwrap();
assert_eq!(hasher.finalize(), hasher.finalize());
let mut reader = hasher.finalize_xof();
reader.set_position(999999);
reader.fill(&mut [0]);
}