tss_esapi/abstraction/
hashing.rs

1// Copyright 2024 Contributors to the Parsec project.
2// SPDX-License-Identifier: Apache-2.0
3
4use crate::interface_types::algorithm::HashingAlgorithm;
5
6#[cfg(feature = "rustcrypto")]
7use {
8    crate::{Error, Result, WrapperErrorKind, structures::HashAgile},
9    digest::{Output, OutputSizeUser},
10};
11
12/// Provides the value of the digest used in this crate for the digest.
13pub trait AssociatedHashingAlgorithm {
14    /// Value of the digest when interacting with the TPM.
15    const TPM_DIGEST: HashingAlgorithm;
16}
17
18#[cfg(feature = "sha1")]
19impl AssociatedHashingAlgorithm for sha1::Sha1 {
20    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sha1;
21}
22
23#[cfg(feature = "sha2")]
24impl AssociatedHashingAlgorithm for sha2::Sha256 {
25    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sha256;
26}
27
28#[cfg(feature = "sha2")]
29impl AssociatedHashingAlgorithm for sha2::Sha384 {
30    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sha384;
31}
32
33#[cfg(feature = "sha2")]
34impl AssociatedHashingAlgorithm for sha2::Sha512 {
35    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sha512;
36}
37
38#[cfg(feature = "sm3")]
39impl AssociatedHashingAlgorithm for sm3::Sm3 {
40    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sm3_256;
41}
42
43#[cfg(feature = "sha3")]
44impl AssociatedHashingAlgorithm for sha3::Sha3_256 {
45    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sha3_256;
46}
47
48#[cfg(feature = "sha3")]
49impl AssociatedHashingAlgorithm for sha3::Sha3_384 {
50    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sha3_384;
51}
52
53#[cfg(feature = "sha3")]
54impl AssociatedHashingAlgorithm for sha3::Sha3_512 {
55    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sha3_512;
56}
57
58impl HashAgile {
59    #[cfg(feature = "rustcrypto")]
60    #[expect(
61        clippy::unnecessary_fallible_conversions,
62        reason = "GenericArray::From<&[T]> will panic if the payload is not the same length"
63    )]
64    /// Return the hash content of the [`HashAgile`]
65    ///
66    /// # Errors
67    ///
68    /// Return an error if the specified [`AssociatedHashingAlgorithm`] is not the
69    /// one in the [`HashAgile`].
70    pub fn to_output<H: AssociatedHashingAlgorithm + OutputSizeUser>(&self) -> Result<Output<H>> {
71        if self.algorithm == H::TPM_DIGEST {
72            <&Output<H>>::try_from(self.digest.as_bytes())
73                .map_err(|_| Error::local_error(WrapperErrorKind::WrongValueFromTpm))
74                .cloned()
75        } else {
76            Err(Error::local_error(WrapperErrorKind::InvalidParam))
77        }
78    }
79}
tss_esapi/abstraction/hashing.rs

tss_esapi/abstraction/
hashing.rs
