23 lines
888 B
Rust
23 lines
888 B
Rust
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// Copyright (c) Facebook, Inc. and its affiliates.
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//
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// This source code is licensed under the MIT license found in the
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// LICENSE file in the root directory of this source tree.
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use digest::{BlockInput, FixedOutput, Reset, Update};
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use generic_array::ArrayLength;
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/// Trait inheriting the requirements from digest::Digest for compatibility with HKDF and HMAC
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// Associated types could be simplified when they are made as defaults:
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// https://github.com/rust-lang/rust/issues/29661
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pub trait Hash: Update + BlockInput + FixedOutput + Reset + Default + Clone {
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/// The block size for the hash function
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type BlockSize: ArrayLength<u8>;
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/// The output size of the hash function
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type OutputSize: ArrayLength<u8>;
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}
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impl<T: Update + BlockInput + FixedOutput + Reset + Default + Clone> Hash for T {
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type BlockSize = T::BlockSize;
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type OutputSize = T::OutputSize;
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}
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