Discovery set up

infrastructure/crypto.go

@@ -0,0 +1,49 @@
+package infrastructure
+
+import (
+	"fmt"
+	"oc-peer/conf"
+	"os"
+
+	"github.com/libp2p/go-libp2p/core/crypto"
+)
+
+func sign(priv crypto.PrivKey, data []byte) ([]byte, error) {
+	return priv.Sign(data)
+}
+
+func verify(pub crypto.PubKey, data, sig []byte) (bool, error) {
+	return pub.Verify(data, sig)
+}
+
+func loadKeyFromFile(isPublic bool) (crypto.PrivKey, error) {
+	path := conf.GetConfig().PrivateKeyPath
+	if isPublic {
+		path = conf.GetConfig().PublicKeyPath
+	}
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	// Try to unmarshal as libp2p private key (supports ed25519, rsa, etc.)
+	priv, err := crypto.UnmarshalPrivateKey(data)
+	if err != nil {
+		return nil, err
+	}
+	return priv, nil
+}
+
+func VerifyPubWithPriv() bool {
+	priv, err := loadKeyFromFile(false)
+	if err != nil {
+		fmt.Println(err)
+		return false
+	}
+	pub, err := loadKeyFromFile(true)
+	if err != nil {
+		fmt.Println(err)
+		return false
+	}
+	return priv.GetPublic().Equals(pub)
+}