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Adding a hash type to CipherSuite (#24)

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This commit is contained in:
Kevin Lewi
2020-07-27 15:25:04 -07:00
committed by GitHub
parent 72a3928cbb
commit c2edb2d95e
15 changed files with 570 additions and 492 deletions
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src/map_to_curve.rs
+4 -3
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@@ -11,8 +11,9 @@ use curve25519_dalek::{edwards::EdwardsPoint, ristretto::RistrettoPoint};
use generic_array::GenericArray;
use hkdf::Hkdf;
use sha2::{Sha256, Sha512};
/// A subtrait of Group specifying how to has a password into a point
/// A subtrait of Group specifying how to hash a password into a point
pub trait GroupWithMapToCurve: Group {
/// transforms a password and optional pepper into a curve point
fn map_to_curve(password: &[u8], pepper: Option<&[u8]>) -> Self;
@@ -20,14 +21,14 @@ pub trait GroupWithMapToCurve: Group {
impl GroupWithMapToCurve for RistrettoPoint {
fn map_to_curve(password: &[u8], pepper: Option<&[u8]>) -> Self {
let (hashed_input, _) = Hkdf::<sha2::Sha512>::extract(pepper, password);
let (hashed_input, _) = Hkdf::<Sha512>::extract(pepper, password);
<Self as Group>::hash_to_curve(GenericArray::from_slice(&hashed_input))
}
}
impl GroupWithMapToCurve for EdwardsPoint {
fn map_to_curve(password: &[u8], pepper: Option<&[u8]>) -> Self {
let (hashed_input, _) = Hkdf::<sha2::Sha256>::extract(pepper, password);
let (hashed_input, _) = Hkdf::<Sha256>::extract(pepper, password);
<Self as Group>::hash_to_curve(GenericArray::from_slice(&hashed_input))
}
}