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This commit is contained in:
Jan Winkelmann (keks)
2025-02-28 18:26:36 +01:00
parent 30c3de3f87
commit 2dba9205e7
20 changed files with 521 additions and 335 deletions
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14
ciphers/src/subtle/rust_crypto/blake2b.rs
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@@ -8,26 +8,24 @@ use blake2::Blake2bMac;
use rosenpass_cipher_traits::primitives::KeyedHash;
use rosenpass_to::{ops::copy_slice, To};
pub use rosenpass_cipher_traits::algorithms::keyed_hash_blake2b::HASH_LEN;
pub use rosenpass_cipher_traits::algorithms::keyed_hash_blake2b::KEY_LEN;
/// Specify that the used implementation of BLAKE2b is the MAC version of BLAKE2b
/// with output and key length of 32 bytes (see [Blake2bMac]).
type Impl = Blake2bMac<U32>;
/// The key length for BLAKE2b supported by this API. Currently 32 Bytes.
const KEY_LEN: usize = 32;
/// The output length for BLAKE2b supported by this API. Currently 32 Bytes.
const OUT_LEN: usize = 32;
/// Hashes the given `data` with the [Blake2bMac] hash function under the given `key`.
/// The both the length of the output the length of the key 32 bytes (or 256 bits).
pub struct Blake2b;
impl KeyedHash<KEY_LEN, OUT_LEN> for Blake2b {
impl KeyedHash<KEY_LEN, HASH_LEN> for Blake2b {
type Error = anyhow::Error;
fn keyed_hash(
key: &[u8; KEY_LEN],
data: &[u8],
out: &mut [u8; OUT_LEN],
out: &mut [u8; HASH_LEN],
) -> Result<(), Self::Error> {
let mut h = Impl::new_from_slice(key)?;
h.update(data);
@@ -36,7 +34,7 @@ impl KeyedHash<KEY_LEN, OUT_LEN> for Blake2b {
// but it introduces a ton of complexity. This cost me half an hour just to figure
// out the right way to use the imports while allowing for zeroization.
// An API based on slices might actually be simpler.
let mut tmp = Zeroizing::new([0u8; OUT_LEN]);
let mut tmp = Zeroizing::new([0u8; HASH_LEN]);
let tmp = GenericArray::from_mut_slice(tmp.as_mut());
h.finalize_into(tmp);
copy_slice(tmp.as_ref()).to(out);