digest/dev/
fixed.rs

1use crate::{Digest, FixedOutput, FixedOutputReset, HashMarker, dev::TestVector};
2
3/// Fixed-output resettable digest test via the `Digest` trait
4pub fn fixed_reset_test<D: FixedOutputReset + Clone + Default + HashMarker>(
5    &TestVector { input, output }: &TestVector,
6) -> Result<(), &'static str> {
7    let mut hasher = D::new();
8    // Test that it works when accepting the message all at once
9    hasher.update(input);
10    let mut hasher2 = hasher.clone();
11    if hasher.finalize()[..] != output[..] {
12        return Err("whole message");
13    }
14
15    // Test if reset works correctly
16    hasher2.reset();
17    hasher2.update(input);
18    if hasher2.finalize_reset()[..] != output[..] {
19        return Err("whole message after reset");
20    }
21
22    // Test that it works when accepting the message in chunks
23    for n in 1..core::cmp::min(17, input.len()) {
24        let mut hasher = D::new();
25        for chunk in input.chunks(n) {
26            hasher.update(chunk);
27            hasher2.update(chunk);
28        }
29        if hasher.finalize()[..] != output[..] {
30            return Err("message in chunks");
31        }
32        if hasher2.finalize_reset()[..] != output[..] {
33            return Err("message in chunks");
34        }
35    }
36
37    Ok(())
38}
39
40/// Variable-output resettable digest test
41pub fn fixed_test<D: FixedOutput + Default + HashMarker>(
42    &TestVector { input, output }: &TestVector,
43) -> Result<(), &'static str> {
44    let mut hasher = D::default();
45    // Test that it works when accepting the message all at once
46    hasher.update(input);
47    if hasher.finalize_fixed()[..] != output[..] {
48        return Err("whole message");
49    }
50
51    // Test that it works when accepting the message in chunks
52    for n in 1..core::cmp::min(17, input.len()) {
53        let mut hasher = D::default();
54        for chunk in input.chunks(n) {
55            hasher.update(chunk);
56        }
57        if hasher.finalize_fixed()[..] != output[..] {
58            return Err("message in chunks");
59        }
60    }
61    Ok(())
62}
digest/dev/fixed.rs

digest/dev/
fixed.rs
