crypto_dispatch/algorithms/
hmac.rs

1// SPDX-FileCopyrightText: Copyright © 2026 ReallyMe LLC. All rights reserved
2//
3// SPDX-License-Identifier: Apache-2.0
4
5use crate::traits::{MacAlgorithmAdapter, MacParams};
6use crate::AlgorithmError;
7use crypto_core::MacAlgorithm;
8
9/// HMAC-SHA-256 adapter.
10pub struct HmacSha256Algo;
11
12/// HMAC-SHA-512 adapter.
13pub struct HmacSha512Algo;
14
15impl MacAlgorithmAdapter for HmacSha256Algo {
16    const ALG: MacAlgorithm = MacAlgorithm::HmacSha256;
17
18    fn authenticate(params: &MacParams<'_>, message: &[u8]) -> Result<Vec<u8>, AlgorithmError> {
19        authenticate(Self::ALG, params, message)
20    }
21
22    fn verify(params: &MacParams<'_>, message: &[u8], tag: &[u8]) -> Result<(), AlgorithmError> {
23        verify(Self::ALG, params, message, tag)
24    }
25}
26
27impl MacAlgorithmAdapter for HmacSha512Algo {
28    const ALG: MacAlgorithm = MacAlgorithm::HmacSha512;
29
30    fn authenticate(params: &MacParams<'_>, message: &[u8]) -> Result<Vec<u8>, AlgorithmError> {
31        authenticate(Self::ALG, params, message)
32    }
33
34    fn verify(params: &MacParams<'_>, message: &[u8], tag: &[u8]) -> Result<(), AlgorithmError> {
35        verify(Self::ALG, params, message, tag)
36    }
37}
38
39fn authenticate(
40    algorithm: MacAlgorithm,
41    params: &MacParams<'_>,
42    message: &[u8],
43) -> Result<Vec<u8>, AlgorithmError> {
44    #[cfg(any(feature = "native", all(feature = "wasm", target_arch = "wasm32")))]
45    {
46        let key = crypto_hmac::HmacKey::from_slice(params.key)?;
47        let tag = crypto_hmac::authenticate(algorithm, &key, message)?;
48        Ok(tag.into_vec())
49    }
50
51    #[cfg(not(any(feature = "native", all(feature = "wasm", target_arch = "wasm32"))))]
52    {
53        let _ = (params, message);
54        Err(AlgorithmError::UnsupportedMacAlgorithm(algorithm))
55    }
56}
57
58fn verify(
59    algorithm: MacAlgorithm,
60    params: &MacParams<'_>,
61    message: &[u8],
62    tag: &[u8],
63) -> Result<(), AlgorithmError> {
64    #[cfg(any(feature = "native", all(feature = "wasm", target_arch = "wasm32")))]
65    {
66        let key = crypto_hmac::HmacKey::from_slice(params.key)?;
67        crypto_hmac::verify(algorithm, &key, message, tag)?;
68        Ok(())
69    }
70
71    #[cfg(not(any(feature = "native", all(feature = "wasm", target_arch = "wasm32"))))]
72    {
73        let _ = (params, message, tag);
74        Err(AlgorithmError::UnsupportedMacAlgorithm(algorithm))
75    }
76}
crypto_dispatch/algorithms/hmac.rs

crypto_dispatch/algorithms/
hmac.rs
