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mamoniot 2023-03-14 18:19:21 -04:00
parent 87eb124551
commit e3268fa524
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zssp/src/zssp.rs
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@ -1703,7 +1703,7 @@ fn mix_hash(h: &[u8; NOISE_HASHLEN], m: &[u8]) -> [u8; NOISE_HASHLEN] {
/// HMAC-SHA512 key derivation based on: https://csrc.nist.gov/publications/detail/sp/800-108/final (page 7)
/// Cryptographically this isn't meaningfully different from HMAC(key, [label]) but this is how NIST rolls.
/// These are the values we have assigned to the 5 variables involved in https://csrc.nist.gov/publications/detail/sp/800-108/final:
/// These are the values we have assigned to the 5 variables involved in their KDF:
/// K_in = key, i = 1u8, Label = b'Z'||b'T'||LABEL, Context = 0u8, L = 512u16 or 256u16
fn kbkdf512<const LABEL: u8>(key: &Secret<NOISE_HASHLEN>) -> Secret<NOISE_HASHLEN> {
hmac_sha512_secret(key.as_bytes(), &[1, b'Z', b'T', LABEL, 0x00, 0, 2u8, 0u8])