adds a AssociatedHashingAlgorithm to bridge to rustcrypto

Signed-off-by: Arthur Gautier <arthur.gautier@arista.com>

tss-esapi/Cargo.toml

@@ -34,8 +34,12 @@ p224 = { version = "0.13.2", optional = true }
 p256 = { version = "0.13.2", optional = true }
 p384 = { version = "0.13.0", optional = true }
 p521 = { version = "0.13.3", optional = true }
-sm2 = { version = "0.13.3", optional = true }
 rsa = { version = "0.9", optional = true }
+sha1 = { version = "0.10.6", optional = true }
+sha2 = { version = "0.10.8", optional = true }
+sha3 = { version = "0.10.8", optional = true }
+sm2 = { version = "0.13.3", optional = true }
+sm3 = { version = "0.4.2", optional = true }
 digest = "0.10.7"
 cfg-if = "1.0.0"
 strum = { version = "0.25.0", optional = true }
@@ -54,5 +58,5 @@ semver = "1.0.7"
 [features]
 default = ["abstraction"]
 generate-bindings = ["tss-esapi-sys/generate-bindings"]
-abstraction = ["elliptic-curve", "rsa", "x509-cert", "p192", "p224", "p256", "p384", "p521", "sm2"]
+abstraction = ["elliptic-curve", "rsa", "x509-cert", "p192", "p224", "p256", "p384", "p521", "sha1", "sha2", "sha3", "sm2", "sm3"]
 integration-tests = ["strum", "strum_macros"]

tss-esapi/src/abstraction/hashing.rs

@@ -0,0 +1,50 @@
+// Copyright 2024 Contributors to the Parsec project.
+// SPDX-License-Identifier: Apache-2.0
+
+use crate::interface_types::algorithm::HashingAlgorithm;
+
+/// Provides the value of the digest used in this crate for the digest.
+pub trait AssociatedHashingAlgorithm {
+    /// Value of the digest when interacting with the TPM.
+    const TPM_DIGEST: HashingAlgorithm;
+}
+
+#[cfg(feature = "sha1")]
+impl AssociatedHashingAlgorithm for sha1::Sha1 {
+    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sha1;
+}
+
+#[cfg(feature = "sha2")]
+impl AssociatedHashingAlgorithm for sha2::Sha256 {
+    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sha256;
+}
+
+#[cfg(feature = "sha2")]
+impl AssociatedHashingAlgorithm for sha2::Sha384 {
+    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sha384;
+}
+
+#[cfg(feature = "sha2")]
+impl AssociatedHashingAlgorithm for sha2::Sha512 {
+    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sha512;
+}
+
+#[cfg(feature = "sm3")]
+impl AssociatedHashingAlgorithm for sm3::Sm3 {
+    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sm3_256;
+}
+
+#[cfg(feature = "sha3")]
+impl AssociatedHashingAlgorithm for sha3::Sha3_256 {
+    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sha3_256;
+}
+
+#[cfg(feature = "sha3")]
+impl AssociatedHashingAlgorithm for sha3::Sha3_384 {
+    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sha3_384;
+}
+
+#[cfg(feature = "sha3")]
+impl AssociatedHashingAlgorithm for sha3::Sha3_512 {
+    const TPM_DIGEST: HashingAlgorithm = HashingAlgorithm::Sha3_512;
+}

tss-esapi/src/abstraction/mod.rs

@@ -9,6 +9,9 @@ pub mod pcr;
 pub mod public;
 pub mod transient;
 
+mod hashing;
+pub use hashing::AssociatedHashingAlgorithm;
+
 use std::convert::TryFrom;
 
 use crate::{