From fe250c32c331a08e35d19f7b509819cd981720d3 Mon Sep 17 00:00:00 2001
From: Toshit Chawda <r58playz@gmail.com>
Date: Fri, 25 Oct 2024 22:44:40 -0700
Subject: [PATCH] sha512 -> sha256

---
 server/src/handle/wisp/utils.rs |  6 +++---
 simple-wisp-client/src/main.rs  |  6 +++---
 wisp/src/extensions/cert.rs     | 16 ++++++++--------
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/server/src/handle/wisp/utils.rs b/server/src/handle/wisp/utils.rs
index b098cab..f763dda 100644
--- a/server/src/handle/wisp/utils.rs
+++ b/server/src/handle/wisp/utils.rs
@@ -1,7 +1,7 @@
 use std::{path::PathBuf, sync::Arc};
 
 use ed25519_dalek::{pkcs8::DecodePublicKey, VerifyingKey};
-use sha2::{Digest, Sha512};
+use sha2::{Digest, Sha256};
 use wisp_mux::extensions::cert::VerifyKey;
 
 pub async fn get_certificates_from_paths(paths: Vec<PathBuf>) -> anyhow::Result<Vec<VerifyKey>> {
@@ -11,9 +11,9 @@ pub async fn get_certificates_from_paths(paths: Vec<PathBuf>) -> anyhow::Result<
 		let verifier = VerifyingKey::from_public_key_pem(&data)?;
 		let binary_key = verifier.to_bytes();
 
-		let mut hasher = Sha512::new();
+		let mut hasher = Sha256::new();
 		hasher.update(binary_key);
-		let hash: [u8; 64] = hasher.finalize().into();
+		let hash: [u8; 32] = hasher.finalize().into();
 		out.push(VerifyKey::new_ed25519(Arc::new(verifier), hash));
 	}
 	Ok(out)
diff --git a/simple-wisp-client/src/main.rs b/simple-wisp-client/src/main.rs
index c03f86f..d89a0ab 100644
--- a/simple-wisp-client/src/main.rs
+++ b/simple-wisp-client/src/main.rs
@@ -11,7 +11,7 @@ use hyper::{
 	Request, Uri,
 };
 use hyper_util::rt::TokioIo;
-use sha2::{Digest, Sha512};
+use sha2::{Digest, Sha256};
 use simple_moving_average::{SingleSumSMA, SMA};
 use std::{
 	error::Error,
@@ -113,9 +113,9 @@ async fn get_cert(path: PathBuf) -> Result<SigningKey, Box<dyn Error + Sync + Se
 	let signer = ed25519_dalek::SigningKey::from_pkcs8_pem(&data)?;
 	let binary_key = signer.verifying_key().to_bytes();
 
-	let mut hasher = Sha512::new();
+	let mut hasher = Sha256::new();
 	hasher.update(binary_key);
-	let hash: [u8; 64] = hasher.finalize().into();
+	let hash: [u8; 32] = hasher.finalize().into();
 	Ok(SigningKey::new_ed25519(Arc::new(signer), hash))
 }
 
diff --git a/wisp/src/extensions/cert.rs b/wisp/src/extensions/cert.rs
index b5b2075..2a1d052 100644
--- a/wisp/src/extensions/cert.rs
+++ b/wisp/src/extensions/cert.rs
@@ -66,8 +66,8 @@ bitflags::bitflags! {
 pub struct VerifyKey {
 	/// Certificate type of the keypair.
 	pub cert_type: SupportedCertificateTypes,
-	/// SHA-512 hash of the public key.
-	pub hash: [u8; 64],
+	/// SHA-256 hash of the public key.
+	pub hash: [u8; 32],
 	/// Verifier.
 	pub verifier: Arc<dyn Verifier<Signature> + Sync + Send>,
 }
@@ -76,7 +76,7 @@ impl VerifyKey {
 	/// Create a new ED25519 verification key.
 	pub fn new_ed25519(
 		verifier: Arc<dyn Verifier<Signature> + Sync + Send>,
-		hash: [u8; 64],
+		hash: [u8; 32],
 	) -> Self {
 		Self {
 			cert_type: SupportedCertificateTypes::Ed25519,
@@ -91,14 +91,14 @@ impl VerifyKey {
 pub struct SigningKey {
 	/// Certificate type of the keypair.
 	pub cert_type: SupportedCertificateTypes,
-	/// SHA-512 hash of the public key.
-	pub hash: [u8; 64],
+	/// SHA-256 hash of the public key.
+	pub hash: [u8; 32],
 	/// Signer.
 	pub signer: Arc<dyn Signer<Signature> + Sync + Send>,
 }
 impl SigningKey {
 	/// Create a new ED25519 signing key.
-	pub fn new_ed25519(signer: Arc<dyn Signer<Signature> + Sync + Send>, hash: [u8; 64]) -> Self {
+	pub fn new_ed25519(signer: Arc<dyn Signer<Signature> + Sync + Send>, hash: [u8; 32]) -> Self {
 		Self {
 			cert_type: SupportedCertificateTypes::Ed25519,
 			hash,
@@ -123,8 +123,8 @@ pub enum CertAuthProtocolExtension {
 	Client {
 		/// Chosen certificate type.
 		cert_type: SupportedCertificateTypes,
-		/// Hash of public key.
-		hash: [u8; 64],
+		/// SHA-256 hash of public key.
+		hash: [u8; 32],
 		/// Signature of challenge.
 		signature: Bytes,
 	},