1#![allow(clippy::duplicate_mod)]
2
3use alloc::boxed::Box;
4
5use super::ring_like;
6use crate::crypto;
7
8pub(crate) static HMAC_SHA256: Hmac = Hmac(&ring_like::hmac::HMAC_SHA256);
9pub(crate) static HMAC_SHA384: Hmac = Hmac(&ring_like::hmac::HMAC_SHA384);
10#[allow(dead_code)] // Only used for TLS 1.2 prf test, and aws-lc-rs HPKE suites.
11pub(crate) static HMAC_SHA512: Hmac = Hmac(&ring_like::hmac::HMAC_SHA512);
12
13pub(crate) struct Hmac(&'static ring_like::hmac::Algorithm);
14
15impl crypto::hmac::Hmac for Hmac {
16 fn with_key(&self, key: &[u8]) -> Box<dyn crypto::hmac::Key> {
17 Box::new(Key(ring_like::hmac::Key::new(*self.0, key)))
18 }
19
20 fn hash_output_len(&self) -> usize {
21 self.0.digest_algorithm().output_len()
22 }
23
24 fn fips(&self) -> bool {
25 super::fips()
26 }
27}
28
29struct Key(ring_like::hmac::Key);
30
31impl crypto::hmac::Key for Key {
32 fn sign_concat(&self, first: &[u8], middle: &[&[u8]], last: &[u8]) -> crypto::hmac::Tag {
33 let mut ctx: Context = ring_like::hmac::Context::with_key(&self.0);
34 ctx.update(data:first);
35 for d: &&[u8] in middle {
36 ctx.update(data:d);
37 }
38 ctx.update(data:last);
39 crypto::hmac::Tag::new(bytes:ctx.sign().as_ref())
40 }
41
42 fn tag_len(&self) -> usize {
43 self.0
44 .algorithm()
45 .digest_algorithm()
46 .output_len()
47 }
48}
49