first commit

server/internal/grpc/server.go

@@ -0,0 +1,81 @@
+package grpcserver
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"net"
+
+	"github.com/mrhid6/keymanager/server/internal/grpc/pb"
+	"github.com/mrhid6/keymanager/server/internal/services"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/encoding"
+	"google.golang.org/grpc/status"
+)
+
+func init() {
+	encoding.RegisterCodec(JSONCodec{})
+}
+
+type keyManagerServer struct {
+	pb.UnimplementedKeyManagerServer
+}
+
+func (s *keyManagerServer) Register(ctx context.Context, req *pb.RegisterRequest) (*pb.RegisterResponse, error) {
+	agentToken, err := services.RegisterServer(req.ServerId, req.PreRegToken, req.Hostname, req.IpAddress, req.OsInfo)
+	if err != nil {
+		return nil, status.Errorf(codes.InvalidArgument, "registration failed: %v", err)
+	}
+	return &pb.RegisterResponse{AgentToken: agentToken}, nil
+}
+
+func (s *keyManagerServer) SyncKeys(ctx context.Context, req *pb.SyncRequest) (*pb.SyncResponse, error) {
+	srv, err := services.ValidateAgentToken(req.ServerId, req.AgentToken)
+	if err != nil {
+		return nil, status.Errorf(codes.Unauthenticated, "invalid agent token")
+	}
+
+	if err := services.UpdateServerLastSeen(srv.ServerID); err != nil {
+		log.Printf("failed to update last seen for %s: %v", srv.ServerID, err)
+	}
+
+	keys, err := services.BuildAuthorizedKeys(req.ServerId)
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "failed to build authorized keys: %v", err)
+	}
+
+	return &pb.SyncResponse{PublicKeys: keys}, nil
+}
+
+func (s *keyManagerServer) UploadGeneratedKey(ctx context.Context, req *pb.UploadKeyRequest) (*pb.UploadKeyResponse, error) {
+	srv, err := services.ValidateAgentToken(req.ServerId, req.AgentToken)
+	if err != nil {
+		return nil, status.Errorf(codes.Unauthenticated, "invalid agent token")
+	}
+
+	key, err := services.CreateKey(req.Label, req.PublicKey, "generated", srv.ServerID)
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "failed to store key: %v", err)
+	}
+
+	// Auto-assign to the generating server
+	if _, err := services.AssignKey(key.KeyID, srv.ServerID); err != nil {
+		log.Printf("failed to auto-assign generated key: %v", err)
+	}
+
+	return &pb.UploadKeyResponse{KeyId: key.KeyID}, nil
+}
+
+func StartGRPC(port int) error {
+	lis, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
+	if err != nil {
+		return fmt.Errorf("failed to listen: %w", err)
+	}
+
+	s := grpc.NewServer()
+	pb.RegisterKeyManagerServer(s, &keyManagerServer{})
+
+	log.Printf("gRPC server listening on :%d", port)
+	return s.Serve(lis)
+}