Add prehash: false to p256.verify/sign methods

Author: holgerd77

packages/evm/README.md

@@ -382,7 +382,7 @@ const pointY = bigIntToHex(pointPubKey.Y)
 
 // Message (hash) / signature
 const msg = new TextEncoder().encode('Hello Fusaka!')
-const sig = p256.sign(msg, secretKey, { lowS: false })
+const sig = p256.sign(msg, secretKey, { lowS: false, prehash: false })
 const msgHash = bytesToHex(sha256(msg))
 const sigR = bytesToHex(sig).substring(2, 64 + 2)
 const sigS = bytesToHex(sig).substring(64 + 2)

packages/evm/src/precompiles/100-p256verify.ts

@@ -118,7 +118,10 @@ export function precompile100(opts: PrecompileInput): ExecResult {
     const signature = p256.Signature.fromBytes(signatureBytes).toBytes()
 
     // Verify signature
-    const isValid = p256.verify(signature, msgHash, publicKey.toBytes(false), { lowS: false })
+    const isValid = p256.verify(signature, msgHash, publicKey.toBytes(false), {
+      lowS: false,
+      prehash: false,
+    })
 
     if (isValid) {
       if (opts._debug !== undefined) {

packages/evm/test/precompiles/100-p256verify.spec.ts

@@ -18,7 +18,7 @@ const testCases = [
       const message = new Uint8Array(32)
       message[31] = 1 // Simple test message
 
-      const signatureBytes = p256.sign(message, privateKey, { lowS: false })
+      const signatureBytes = p256.sign(message, privateKey, { lowS: false, prehash: false })
 
       // Format input: msgHash (32) + r (32) + s (32) + qx (32) + qy (32)
       const input = new Uint8Array(160)
@@ -99,7 +99,7 @@ const testCases = [
       // Use wrong message for signature
       const wrongMessage = new Uint8Array(32)
       wrongMessage[31] = 2
-      const signature = p256.sign(wrongMessage, privateKey, { lowS: false })
+      const signature = p256.sign(wrongMessage, privateKey, { lowS: false, prehash: false })
 
       const input = new Uint8Array(160)
       input.set(message, 0) // msgHash (different from signed message)