initial addition of essential crypto, encoders, workflows and LLM instructions

pkg/crypto/ec/secp256k1/ecdh_test.go

@@ -0,0 +1,35 @@
+// Copyright (c) 2015-2016 The btcsuite developers
+// Copyright (c) 2015-2017 The Decred developers
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
+package secp256k1
+
+import (
+	"testing"
+
+	"next.orly.dev/pkg/utils"
+)
+
+func TestGenerateSharedSecret(t *testing.T) {
+	secKey1, err := GenerateSecretKey()
+	if err != nil {
+		t.Errorf("secret key generation error: %s", err)
+		return
+	}
+	secKey2, err := GenerateSecretKey()
+	if err != nil {
+		t.Errorf("secret key generation error: %s", err)
+		return
+	}
+	pubKey1 := secKey1.PubKey()
+	pubKey2 := secKey2.PubKey()
+	secret1 := GenerateSharedSecret(secKey1, pubKey2)
+	secret2 := GenerateSharedSecret(secKey2, pubKey1)
+	if !utils.FastEqual(secret1, secret2) {
+		t.Errorf(
+			"ECDH failed, secrets mismatch - first: %x, second: %x",
+			secret1, secret2,
+		)
+	}
+}