ssh/algorithm/mac/
hmac_sha1.rs

1use crate::algorithm::mac::Mac;
2use ring::hmac;
3use ring::hmac::{Context, Tag};
4
5const BSIZE: usize = 20;
6
7pub(super) struct HMacSha1;
8
9impl Mac for HMacSha1 {
10    fn sign(&self, ik: &[u8], sequence_num: u32, buf: &[u8]) -> Tag {
11        let ik = &ik[..BSIZE];
12        let key = hmac::Key::new(hmac::HMAC_SHA1_FOR_LEGACY_USE_ONLY, ik);
13        let mut c = Context::with_key(&key);
14        c.update(sequence_num.to_be_bytes().as_slice());
15        c.update(buf);
16        c.sign()
17    }
18
19    fn new() -> Self
20    where
21        Self: Sized,
22    {
23        HMacSha1
24    }
25
26    fn bsize(&self) -> usize {
27        BSIZE
28    }
29}

ssh/algorithm/mac/hmac_sha1.rs

ssh/algorithm/mac/
hmac_sha1.rs