Add benchmark results and performance analysis for ECDSA and ECDH operations

This commit introduces two new files: `BENCHMARK_RESULTS.md` and `benchmark_results.txt`, which document the performance metrics of various cryptographic operations, including ECDSA signing, verification, and ECDH key exchange. The results provide insights into operation times, memory allocations, and comparisons with C implementations. Additionally, new test files for ECDSA and ECDH functionalities have been added, ensuring comprehensive coverage and validation of the implemented algorithms. This enhances the overall robustness and performance understanding of the secp256k1 implementation.

ecdsa_test.go

@@ -0,0 +1,104 @@
+package p256k1
+
+import (
+	"crypto/rand"
+	"testing"
+)
+
+func TestECDSASignVerify(t *testing.T) {
+	// Generate a random private key
+	seckey := make([]byte, 32)
+	if _, err := rand.Read(seckey); err != nil {
+		t.Fatal(err)
+	}
+	
+	// Ensure it's a valid private key
+	var scalar Scalar
+	for !scalar.setB32Seckey(seckey) {
+		if _, err := rand.Read(seckey); err != nil {
+			t.Fatal(err)
+		}
+	}
+	
+	// Create public key
+	var pubkey PublicKey
+	if err := ECPubkeyCreate(&pubkey, seckey); err != nil {
+		t.Fatalf("failed to create public key: %v", err)
+	}
+	
+	// Create message hash
+	msghash := make([]byte, 32)
+	if _, err := rand.Read(msghash); err != nil {
+		t.Fatal(err)
+	}
+	
+	// Sign
+	var sig ECDSASignature
+	if err := ECDSASign(&sig, msghash, seckey); err != nil {
+		t.Fatalf("failed to sign: %v", err)
+	}
+	
+	// Verify
+	if !ECDSAVerify(&sig, msghash, &pubkey) {
+		t.Error("signature verification failed")
+	}
+	
+	// Test with wrong message
+	wrongMsg := make([]byte, 32)
+	copy(wrongMsg, msghash)
+	wrongMsg[0] ^= 1
+	if ECDSAVerify(&sig, wrongMsg, &pubkey) {
+		t.Error("signature verification should fail with wrong message")
+	}
+}
+
+func TestECDSASignCompact(t *testing.T) {
+	// Generate a random private key
+	seckey := make([]byte, 32)
+	if _, err := rand.Read(seckey); err != nil {
+		t.Fatal(err)
+	}
+	
+	// Ensure it's a valid private key
+	var scalar Scalar
+	for !scalar.setB32Seckey(seckey) {
+		if _, err := rand.Read(seckey); err != nil {
+			t.Fatal(err)
+		}
+	}
+	
+	// Create public key
+	var pubkey PublicKey
+	if err := ECPubkeyCreate(&pubkey, seckey); err != nil {
+		t.Fatalf("failed to create public key: %v", err)
+	}
+	
+	// Create message hash
+	msghash := make([]byte, 32)
+	if _, err := rand.Read(msghash); err != nil {
+		t.Fatal(err)
+	}
+	
+	// Sign using compact format
+	var compactSig ECDSASignatureCompact
+	if err := ECDSASignCompact(&compactSig, msghash, seckey); err != nil {
+		t.Fatalf("failed to sign: %v", err)
+	}
+	
+	// Verify compact signature
+	if !ECDSAVerifyCompact(&compactSig, msghash, &pubkey) {
+		t.Error("compact signature verification failed")
+	}
+	
+	// Test conversion
+	var sig ECDSASignature
+	if err := sig.FromCompact(&compactSig); err != nil {
+		t.Fatalf("failed to parse compact signature: %v", err)
+	}
+	
+	// Verify using regular format
+	if !ECDSAVerify(&sig, msghash, &pubkey) {
+		t.Error("signature verification failed after conversion")
+	}
+}
+