Implement SerializableState for hashes #385
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sha2/src/lib.rs
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| pub type Sha512_224 = CoreWrapper<Sha512_224Core>; | ||
| /// SHA-512/224 core serialized state. | ||
| pub type Sha512_224CoreSerializedState = | ||
| GenericArray<u8, <Sha512_224Core as HashCoreSerializableState>::SerializedStateSize>; |
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I don't think we need to introduce a whole bunch of type aliases for serialized states.
sha2/tests/mod.rs
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| use hex_literal::hex; | ||
| use sha2::{Digest, Sha224, Sha256, Sha384, Sha512, Sha512_224, Sha512_256}; | ||
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| macro_rules! test_serializable_state { | ||
| ($name:ident, $hasher:ty) => { |
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You should add tests which check stability of the serialized state, i.e. that every version of this crate results in the same serialized state for a given hasher state.
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Test macro is moved to traits, added expected_serialized_state. RustCrypto/traits@793f9f2.
sha2/tests/mod.rs
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| let mut h = <$hasher>::new(); | ||
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| // First part of data. | ||
| feed_rand_16mib(&mut h); |
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16 MiB is not a great value for testing serialization, we should use an odd number of bytes to check that buffer gets serialized properly. Also it's a bit too big in my opinion, we can simply use small fixed strings with length equal to block size plus several bytes.
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Test macro is moved to traits, input data is changed to BlockSize + 1.
RustCrypto/traits@793f9f2.
rpiasetskyi
changed the title
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Could you please suggest the best solution for tests if the expected values are very long? |
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You can split it into several lines: let bytes = hex!(
"0001020304050607"
"08090a0b0c0d0e0f"
);
// equivalent to:
let bytes = hex!("000102030405060708090a0b0c0d0e0f");It requires |
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Is it okay if I bump |
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Ah, I forgot about that. In this case simply use new lines: let bytes = hex!("
0001020304050607
08090a0b0c0d0e0f
");Unfortunately, rustfmt does not like it too much, so you may need to add |
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| 13131313131313131313131313131313 | ||
| 01130000000000000000000000000000 | ||
| 00000000000000000000000000000000 | ||
| 00 |
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Hm... This redundant byte for eager hashes is certainly an eyesore. It could be worth to add serialize/deserialize methods to the block-buffer crate.
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This is a rebase of #385 on master. RustCrypto/traits#1369 introduced a `SerializableState` trait to serialize the hasher. This implements it for each of the hashers we have. Co-authored-by: Ruslan Piasetskyi <ruslan.piasetskyi@esrlabs.com>
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Merged as #574 |
The internal state of different hashes can be used for serialization.