Secp256k1 signature noramlization

Author: maxgttph

Cargo.lock

@@ -7,10 +7,10 @@ members = ["contracts", "contracts/wallet", "server"]
 # client-sdk = { default-features = false, package = "hyle-client-sdk", version = "0.13.0-rc.4" }
 # hyle = { version = "0.13.0-rc.4" }
 
-sdk = { path = "../hyle/crates/contract-sdk", package = "hyle-contract-sdk" }
-client-sdk = { path = "../hyle/crates/client-sdk", default-features = false, package = "hyle-client-sdk" }
-hyle-hyllar = { path = "../hyle/crates/contracts/hyllar", package = "hyle-hyllar" }
-hyle-modules = { path = "../hyle/crates/hyle-modules", package = "hyle-modules" }
+sdk = { git = "https://github.com/Hyle-org/hyle.git", package = "hyle-contract-sdk", branch = "secp256k1blob" }
+client-sdk = { git = "https://github.com/Hyle-org/hyle.git", default-features = false, package = "hyle-client-sdk", branch = "secp256k1blob" }
+hyle-hyllar = { git = "https://github.com/Hyle-org/hyle", package = "hyle-hyllar", branch = "secp256k1blob" }
+hyle-modules = { git = "https://github.com/Hyle-org/hyle.git", package = "hyle-modules", branch = "secp256k1blob" }
 
 contracts = { path = "contracts", default-features = false, package = "contracts" }
 wallet = { path = "contracts/wallet", package = "wallet" }

Cargo.toml

@@ -46,10 +46,14 @@ class SessionKeyService {
     const keyPair = this.ec.keyFromPrivate(privateKey);
     const signature = keyPair.sign(hash.toString());
 
-    
-    const r = signature.r.toArray('be', 32);
-    const s = signature.s.toArray('be', 32);
-    const signatureBytes = new Uint8Array([...r, ...s]);
+    // Normaliser s en utilisant min(s, n-s)
+    const n = this.ec.curve.n;
+    var s = signature.s;
+    if (s.gt(n.shrn(1))) {
+      signature.s = n.sub(s);
+    }
+
+    const signatureBytes = new Uint8Array([...signature.r.toArray('be', 32), ...signature.s.toArray('be', 32)]);
 
     const signatureHex = signature.toDER('hex');
     console.log("message:", hash.toString());