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tools/crypto.go

@@ -0,0 +1,51 @@
+package tools
+
+import (
+	"crypto/ed25519"
+	"crypto/x509"
+	"encoding/pem"
+	"fmt"
+	"os"
+
+	"cloud.o-forge.io/core/oc-lib/config"
+	"github.com/libp2p/go-libp2p/core/crypto"
+)
+
+func LoadKeyFromFilePrivate() (crypto.PrivKey, error) {
+	path := config.GetConfig().PrivateKeyPath
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	block, _ := pem.Decode(data)
+	keyAny, err := x509.ParsePKCS8PrivateKey(block.Bytes)
+	if err != nil {
+		return nil, err
+	}
+
+	edKey, ok := keyAny.(ed25519.PrivateKey)
+	if !ok {
+		return nil, fmt.Errorf("not an ed25519 key")
+	}
+	return crypto.UnmarshalEd25519PrivateKey(edKey)
+}
+
+func LoadKeyFromFilePublic() (crypto.PubKey, error) {
+	path := config.GetConfig().PublicKeyPath
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	block, _ := pem.Decode(data)
+	keyAny, err := x509.ParsePKIXPublicKey(block.Bytes)
+	if err != nil {
+		return nil, err
+	}
+
+	edKey, ok := keyAny.(ed25519.PublicKey)
+	if !ok {
+		return nil, fmt.Errorf("not an ed25519 key")
+	}
+	// Try to unmarshal as libp2p private key (supports ed25519, rsa, etc.)
+	return crypto.UnmarshalEd25519PublicKey(edKey)
+}