ssh/algorithm/mac/
hmac_sha2.rs

1use crate::algorithm::mac::Mac;
2use ring::hmac;
3use ring::hmac::{Context, Tag};
4
5const BSIZE_256: usize = 32;
6const BSIZE_512: usize = 64;
7
8pub(super) struct HmacSha2_256;
9pub(super) struct HmacSha2_512;
10
11impl Mac for HmacSha2_256 {
12    fn sign(&self, ik: &[u8], sequence_num: u32, buf: &[u8]) -> Tag {
13        let ik = &ik[..BSIZE_256];
14        let key = hmac::Key::new(hmac::HMAC_SHA256, ik);
15        let mut c = Context::with_key(&key);
16        c.update(sequence_num.to_be_bytes().as_slice());
17        c.update(buf);
18        c.sign()
19    }
20
21    fn new() -> Self
22    where
23        Self: Sized,
24    {
25        HmacSha2_256
26    }
27
28    fn bsize(&self) -> usize {
29        BSIZE_256
30    }
31}
32
33impl Mac for HmacSha2_512 {
34    fn sign(&self, ik: &[u8], sequence_num: u32, buf: &[u8]) -> Tag {
35        let ik = &ik[..BSIZE_512];
36        let key = hmac::Key::new(hmac::HMAC_SHA512, ik);
37        let mut c = Context::with_key(&key);
38        c.update(sequence_num.to_be_bytes().as_slice());
39        c.update(buf);
40        c.sign()
41    }
42
43    fn new() -> Self
44    where
45        Self: Sized,
46    {
47        HmacSha2_512
48    }
49
50    fn bsize(&self) -> usize {
51        BSIZE_512
52    }
53}
ssh/algorithm/mac/hmac_sha2.rs

ssh/algorithm/mac/
hmac_sha2.rs
