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Replace modular_frost::Curve::hash_to_vec with just hash
There's no reason to copy it to a heap allocated value. The Output implements AsRef<[u8]> and all uses are satisfied by that.
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1 changed files with 7 additions and 7 deletions
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@ -6,7 +6,7 @@ use rand::{RngCore, CryptoRng};
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use zeroize::{Zeroize, Zeroizing};
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use subtle::ConstantTimeEq;
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use digest::Digest;
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use digest::{Digest, Output};
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use group::{
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ff::{Field, PrimeField},
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@ -41,8 +41,8 @@ pub trait Curve: Ciphersuite {
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const CONTEXT: &'static [u8];
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/// Hash the given dst and data to a byte vector. Used to instantiate H4 and H5.
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fn hash_to_vec(dst: &[u8], data: &[u8]) -> Vec<u8> {
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Self::H::digest([Self::CONTEXT, dst, data].concat()).as_ref().to_vec()
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fn hash(dst: &[u8], data: &[u8]) -> Output<Self::H> {
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Self::H::digest([Self::CONTEXT, dst, data].concat())
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}
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/// Field element from hash. Used during key gen and by other crates under Serai as a general
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@ -53,13 +53,13 @@ pub trait Curve: Ciphersuite {
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}
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/// Hash the message for the binding factor. H4 from the IETF draft.
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fn hash_msg(msg: &[u8]) -> Vec<u8> {
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Self::hash_to_vec(b"msg", msg)
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fn hash_msg(msg: &[u8]) -> Output<Self::H> {
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Self::hash(b"msg", msg)
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}
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/// Hash the commitments for the binding factor. H5 from the IETF draft.
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fn hash_commitments(commitments: &[u8]) -> Vec<u8> {
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Self::hash_to_vec(b"com", commitments)
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fn hash_commitments(commitments: &[u8]) -> Output<Self::H> {
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Self::hash(b"com", commitments)
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}
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/// Hash the commitments and message to calculate the binding factor. H1 from the IETF draft.
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