Merge pull request tock#3502 from tock/hmac-sha256

Add hmac-sha256 software capsule

boards/nordic/nrf52840dk/src/test/hmac_sha256_test.rs

@@ -0,0 +1,58 @@
+// Licensed under the Apache License, Version 2.0 or the MIT License.
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+// Copyright Tock Contributors 2022.
+
+//! This tests a software HMAC-SHA256 implementation. To run this test, add this
+//! line to the imix boot sequence:
+//!
+//! ```
+//! test::hmac_sha256_test::run_hmacsha256();
+//! ```
+
+use capsules_extra::hmac_sha256::HmacSha256Software;
+use capsules_extra::sha256::Sha256Software;
+use capsules_extra::test::hmac_sha256::TestHmacSha256;
+use kernel::deferred_call::DeferredCallClient;
+use kernel::hil::digest::Digest;
+use kernel::static_init;
+
+pub unsafe fn run_hmacsha256() {
+    let t = static_init_test_hmacsha256();
+    t.run();
+}
+
+pub static mut DIGEST_DATA: [u8; 32] = [0; 32];
+
+// Test from https://en.wikipedia.org/wiki/HMAC#Examples
+pub static mut WIKI_STR: [u8; 43] = *b"The quick brown fox jumps over the lazy dog";
+pub static mut WIKI_KEY: [u8; 3] = *b"key";
+pub static mut WIKI_HMAC: [u8; 32] = [
+    0xf7, 0xbc, 0x83, 0xf4, 0x30, 0x53, 0x84, 0x24, 0xb1, 0x32, 0x98, 0xe6, 0xaa, 0x6f, 0xb1, 0x43,
+    0xef, 0x4d, 0x59, 0xa1, 0x49, 0x46, 0x17, 0x59, 0x97, 0x47, 0x9d, 0xbc, 0x2d, 0x1a, 0x3c, 0xd8,
+];
+
+unsafe fn static_init_test_hmacsha256() -> &'static TestHmacSha256 {
+    let sha256_hash_buf = static_init!([u8; 64], [0; 64]);
+
+    let sha256 = static_init!(Sha256Software<'static>, Sha256Software::new());
+    sha256.register();
+
+    let hmacsha256 = static_init!(
+        HmacSha256Software<'static, Sha256Software<'static>>,
+        HmacSha256Software::new(sha256, sha256_hash_buf)
+    );
+    sha256.set_client(hmacsha256);
+
+    let test = static_init!(
+        TestHmacSha256,
+        TestHmacSha256::new(
+            hmacsha256,
+            &mut WIKI_KEY,
+            &mut WIKI_STR,
+            &mut DIGEST_DATA,
+            &mut WIKI_HMAC
+        )
+    );
+
+    test
+}

boards/nordic/nrf52840dk/src/test/mod.rs

@@ -3,4 +3,5 @@
 // Copyright Tock Contributors 2023.
 
 pub(crate) mod aes_test;
+pub(crate) mod hmac_sha256_test;
 pub(crate) mod siphash24_test;