[#1105] apemanager: Implement apemanager service

* Introduce grpc server for apemanager service and
  its implementation in `pkg/services/apemanager`.

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

cmd/frostfs-node/apemanager.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"net"
+
+	apemanager_grpc "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/apemanager/grpc"
+	ape_contract "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/ape/contract_storage"
+	morph "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client"
+	apemanager_transport "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/network/transport/apemanager/grpc"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/apemanager"
+	"google.golang.org/grpc"
+)
+
+func initAPEManagerService(c *cfg) {
+	contractStorage := ape_contract.NewProxyVerificationContractStorage(
+		morph.NewSwitchRPCGuardedActor(c.cfgMorph.client),
+		c.shared.key,
+		c.cfgMorph.proxyScriptHash,
+		c.cfgObject.cfgAccessPolicyEngine.policyContractHash)
+
+	execsvc := apemanager.New(c.cfgObject.cnrSource, contractStorage,
+		apemanager.WithLogger(c.log))
+	sigsvc := apemanager.NewSignService(&c.key.PrivateKey, execsvc)
+	server := apemanager_transport.New(sigsvc)
+
+	c.cfgGRPC.performAndSave(func(_ string, _ net.Listener, s *grpc.Server) {
+		apemanager_grpc.RegisterAPEManagerServiceServer(s, server)
+	})
+}

cmd/frostfs-node/main.go

@@ -114,6 +114,7 @@ func initApp(ctx context.Context, c *cfg) {
 	initAndLog(c, "notification", func(c *cfg) { initNotifications(ctx, c) })
 	initAndLog(c, "object", initObjectService)
 	initAndLog(c, "tree", initTreeService)
+	initAndLog(c, "apemanager", initAPEManagerService)
 	initAndLog(c, "control", initControlService)
 
 	initAndLog(c, "morph notifications", func(c *cfg) { listenMorphNotifications(ctx, c) })

pkg/network/transport/apemanager/grpc/service.go

@@ -0,0 +1,63 @@
+package apemanager
+
+import (
+	"context"
+
+	apemanager_v2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/apemanager"
+	apemanager_grpc "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/apemanager/grpc"
+	apemanager_svc "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/apemanager"
+)
+
+type Server struct {
+	srv apemanager_svc.Server
+}
+
+var _ apemanager_grpc.APEManagerServiceServer = (*Server)(nil)
+
+func New(c apemanager_svc.Server) *Server {
+	return &Server{
+		srv: c,
+	}
+}
+
+func (s *Server) AddChain(ctx context.Context, req *apemanager_grpc.AddChainRequest) (*apemanager_grpc.AddChainResponse, error) {
+	v2req := new(apemanager_v2.AddChainRequest)
+	if err := v2req.FromGRPCMessage(req); err != nil {
+		return nil, err
+	}
+
+	resp, err := s.srv.AddChain(ctx, v2req)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp.ToGRPCMessage().(*apemanager_grpc.AddChainResponse), nil
+}
+
+func (s *Server) RemoveChain(ctx context.Context, req *apemanager_grpc.RemoveChainRequest) (*apemanager_grpc.RemoveChainResponse, error) {
+	v2req := new(apemanager_v2.RemoveChainRequest)
+	if err := v2req.FromGRPCMessage(req); err != nil {
+		return nil, err
+	}
+
+	resp, err := s.srv.RemoveChain(ctx, v2req)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp.ToGRPCMessage().(*apemanager_grpc.RemoveChainResponse), nil
+}
+
+func (s *Server) ListChains(ctx context.Context, req *apemanager_grpc.ListChainsRequest) (*apemanager_grpc.ListChainsResponse, error) {
+	v2req := new(apemanager_v2.ListChainsRequest)
+	if err := v2req.FromGRPCMessage(req); err != nil {
+		return nil, err
+	}
+
+	resp, err := s.srv.ListChains(ctx, v2req)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp.ToGRPCMessage().(*apemanager_grpc.ListChainsResponse), nil
+}

pkg/services/apemanager/errors/errors.go

@@ -0,0 +1,11 @@
+package errors
+
+import (
+	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
+)
+
+func ErrAPEManagerAccessDenied(reason string) error {
+	err := new(apistatus.APEManagerAccessDenied)
+	err.WriteReason(reason)
+	return err
+}

pkg/services/apemanager/executor.go

@@ -0,0 +1,245 @@
+package apemanager
+
+import (
+	"context"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+	"errors"
+	"fmt"
+
+	apemanager_v2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/apemanager"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
+	session "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session"
+	ape_contract "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/ape/contract_storage"
+	containercore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/container"
+	apemanager_errors "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/apemanager/errors"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
+	cidSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	apechain "git.frostfs.info/TrueCloudLab/policy-engine/pkg/chain"
+	policy_engine "git.frostfs.info/TrueCloudLab/policy-engine/pkg/engine"
+	"github.com/mr-tron/base58/base58"
+	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
+	"go.uber.org/zap"
+)
+
+var (
+	errEmptyBodySignature = errors.New("malformed request: empty body signature")
+)
+
+type cfg struct {
+	log *logger.Logger
+}
+
+type Service struct {
+	cfg
+
+	cnrSrc containercore.Source
+
+	contractStorage ape_contract.ProxyAdaptedContractStorage
+}
+
+type Option func(*cfg)
+
+func New(cnrSrc containercore.Source, contractStorage ape_contract.ProxyAdaptedContractStorage, opts ...Option) *Service {
+	s := &Service{
+		cnrSrc: cnrSrc,
+
+		contractStorage: contractStorage,
+	}
+
+	for i := range opts {
+		opts[i](&s.cfg)
+	}
+
+	if s.log == nil {
+		s.log = &logger.Logger{Logger: zap.NewNop()}
+	}
+
+	return s
+}
+
+func WithLogger(log *logger.Logger) Option {
+	return func(c *cfg) {
+		c.log = log
+	}
+}
+
+var _ Server = (*Service)(nil)
+
+// validateContainerTargetRequest validates request for the container target.
+// It checks if request actor is the owner of the container, otherwise it denies the request.
+func (s *Service) validateContainerTargetRequest(cid string, pubKey *keys.PublicKey) error {
+	var cidSDK cidSDK.ID
+	if err := cidSDK.DecodeString(cid); err != nil {
+		return fmt.Errorf("invalid CID format: %w", err)
+	}
+	isOwner, err := s.isActorContainerOwner(cidSDK, pubKey)
+	if err != nil {
+		return fmt.Errorf("failed to check owner: %w", err)
+	}
+	if !isOwner {
+		return apemanager_errors.ErrAPEManagerAccessDenied("actor must be container owner")
+	}
+	return nil
+}
+
+func (s *Service) AddChain(_ context.Context, req *apemanager_v2.AddChainRequest) (*apemanager_v2.AddChainResponse, error) {
+	pub, err := getSignaturePublicKey(req.GetVerificationHeader())
+	if err != nil {
+		return nil, err
+	}
+
+	chain, err := decodeAndValidateChain(req.GetBody().GetChain().GetKind().(*apemanager_v2.ChainRaw).GetRaw())
+	if err != nil {
+		return nil, err
+	}
+	if len(chain.ID) == 0 {
+		const randomIDLength = 10
+		randID, err := base58Str(randomIDLength)
+		if err != nil {
+			return nil, fmt.Errorf("randomize chain ID error: %w", err)
+		}
+		chain.ID = apechain.ID(randID)
+	}
+
+	var target policy_engine.Target
+
+	switch targetType := req.GetBody().GetTarget().GetTargetType(); targetType {
+	case apemanager_v2.TargetTypeContainer:
+		reqCID := req.GetBody().GetTarget().GetName()
+		if err = s.validateContainerTargetRequest(reqCID, pub); err != nil {
+			return nil, err
+		}
+		target = policy_engine.ContainerTarget(reqCID)
+	default:
+		return nil, fmt.Errorf("unsupported target type: %s", targetType)
+	}
+
+	if _, _, err = s.contractStorage.AddMorphRuleChain(apechain.Ingress, target, &chain); err != nil {
+		return nil, err
+	}
+
+	body := new(apemanager_v2.AddChainResponseBody)
+	body.SetChainID(chain.ID)
+
+	resp := new(apemanager_v2.AddChainResponse)
+	resp.SetBody(body)
+
+	return resp, nil
+}
+
+func (s *Service) RemoveChain(_ context.Context, req *apemanager_v2.RemoveChainRequest) (*apemanager_v2.RemoveChainResponse, error) {
+	pub, err := getSignaturePublicKey(req.GetVerificationHeader())
+	if err != nil {
+		return nil, err
+	}
+
+	var target policy_engine.Target
+
+	switch targetType := req.GetBody().GetTarget().GetTargetType(); targetType {
+	case apemanager_v2.TargetTypeContainer:
+		reqCID := req.GetBody().GetTarget().GetName()
+		if err = s.validateContainerTargetRequest(reqCID, pub); err != nil {
+			return nil, err
+		}
+		target = policy_engine.ContainerTarget(reqCID)
+	default:
+		return nil, fmt.Errorf("unsupported target type: %s", targetType)
+	}
+
+	if _, _, err = s.contractStorage.RemoveMorphRuleChain(apechain.Ingress, target, req.GetBody().GetChainID()); err != nil {
+		return nil, err
+	}
+
+	body := new(apemanager_v2.RemoveChainResponseBody)
+
+	resp := new(apemanager_v2.RemoveChainResponse)
+	resp.SetBody(body)
+
+	return resp, nil
+}
+
+func (s *Service) ListChains(_ context.Context, req *apemanager_v2.ListChainsRequest) (*apemanager_v2.ListChainsResponse, error) {
+	pub, err := getSignaturePublicKey(req.GetVerificationHeader())
+	if err != nil {
+		return nil, err
+	}
+
+	var target policy_engine.Target
+
+	switch targetType := req.GetBody().GetTarget().GetTargetType(); targetType {
+	case apemanager_v2.TargetTypeContainer:
+		reqCID := req.GetBody().GetTarget().GetName()
+		if err = s.validateContainerTargetRequest(reqCID, pub); err != nil {
+			return nil, err
+		}
+		target = policy_engine.ContainerTarget(reqCID)
+	default:
+		return nil, fmt.Errorf("unsupported target type: %s", targetType)
+	}
+
+	chs, err := s.contractStorage.ListMorphRuleChains(apechain.Ingress, target)
+	if err != nil {
+		return nil, err
+	}
+
+	res := make([]*apemanager_v2.Chain, 0, len(chs))
+	for _, ch := range chs {
+		v2chraw := new(apemanager_v2.ChainRaw)
+		v2chraw.SetRaw(ch.Bytes())
+
+		v2ch := new(apemanager_v2.Chain)
+		v2ch.SetKind(v2chraw)
+
+		res = append(res, v2ch)
+	}
+
+	body := new(apemanager_v2.ListChainsResponseBody)
+	body.SetChains(res)
+
+	resp := new(apemanager_v2.ListChainsResponse)
+	resp.SetBody(body)
+
+	return resp, nil
+}
+
+func getSignaturePublicKey(vh *session.RequestVerificationHeader) (*keys.PublicKey, error) {
+	for vh.GetOrigin() != nil {
+		vh = vh.GetOrigin()
+	}
+	sig := vh.GetBodySignature()
+	if sig == nil {
+		return nil, errEmptyBodySignature
+	}
+	key, err := keys.NewPublicKeyFromBytes(sig.GetKey(), elliptic.P256())
+	if err != nil {
+		return nil, fmt.Errorf("invalid signature key: %w", err)
+	}
+
+	return key, nil
+}
+
+func (s *Service) isActorContainerOwner(cid cidSDK.ID, pk *keys.PublicKey) (bool, error) {
+	var actor user.ID
+	user.IDFromKey(&actor, (ecdsa.PublicKey)(*pk))
+	actorOwnerID := new(refs.OwnerID)
+	actor.WriteToV2(actorOwnerID)
+
+	cnr, err := s.cnrSrc.Get(cid)
+	if err != nil {
+		return false, fmt.Errorf("get container error: %w", err)
+	}
+	return cnr.Value.Owner().Equals(actor), nil
+}
+
+// base58Str generates base58 string.
+func base58Str(n int) (string, error) {
+	b := make([]byte, n)
+	_, err := rand.Read(b)
+	if err != nil {
+		return "", err
+	}
+	return base58.FastBase58Encoding(b), nil
+}

pkg/services/apemanager/server.go

@@ -0,0 +1,13 @@
+package apemanager
+
+import (
+	"context"
+
+	apemanager_v2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/apemanager"
+)
+
+type Server interface {
+	AddChain(context.Context, *apemanager_v2.AddChainRequest) (*apemanager_v2.AddChainResponse, error)
+	RemoveChain(context.Context, *apemanager_v2.RemoveChainRequest) (*apemanager_v2.RemoveChainResponse, error)
+	ListChains(context.Context, *apemanager_v2.ListChainsRequest) (*apemanager_v2.ListChainsResponse, error)
+}

pkg/services/apemanager/sign.go

@@ -0,0 +1,49 @@
+package apemanager
+
+import (
+	"context"
+	"crypto/ecdsa"
+
+	apemanager_v2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/apemanager"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util"
+)
+
+type signService struct {
+	sigSvc *util.SignService
+
+	next Server
+}
+
+func NewSignService(key *ecdsa.PrivateKey, next Server) Server {
+	return &signService{
+		sigSvc: util.NewUnarySignService(key),
+		next:   next,
+	}
+}
+
+func (s *signService) AddChain(ctx context.Context, req *apemanager_v2.AddChainRequest) (*apemanager_v2.AddChainResponse, error) {
+	if err := s.sigSvc.VerifyRequest(req); err != nil {
+		resp := new(apemanager_v2.AddChainResponse)
+		return resp, s.sigSvc.SignResponse(resp, err)
+	}
+	resp, err := util.EnsureNonNilResponse(s.next.AddChain(ctx, req))
+	return resp, s.sigSvc.SignResponse(resp, err)
+}
+
+func (s *signService) RemoveChain(ctx context.Context, req *apemanager_v2.RemoveChainRequest) (*apemanager_v2.RemoveChainResponse, error) {
+	if err := s.sigSvc.VerifyRequest(req); err != nil {
+		resp := new(apemanager_v2.RemoveChainResponse)
+		return resp, s.sigSvc.SignResponse(resp, err)
+	}
+	resp, err := util.EnsureNonNilResponse(s.next.RemoveChain(ctx, req))
+	return resp, s.sigSvc.SignResponse(resp, err)
+}
+
+func (s *signService) ListChains(ctx context.Context, req *apemanager_v2.ListChainsRequest) (*apemanager_v2.ListChainsResponse, error) {
+	if err := s.sigSvc.VerifyRequest(req); err != nil {
+		resp := new(apemanager_v2.ListChainsResponse)
+		return resp, s.sigSvc.SignResponse(resp, err)
+	}
+	resp, err := util.EnsureNonNilResponse(s.next.ListChains(ctx, req))
+	return resp, s.sigSvc.SignResponse(resp, err)
+}

pkg/services/apemanager/validation.go

@@ -0,0 +1,23 @@
+package apemanager
+
+import (
+	"fmt"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/control/server/ape"
+	apechain "git.frostfs.info/TrueCloudLab/policy-engine/pkg/chain"
+)
+
+func decodeAndValidateChain(encodedChain []byte) (chain apechain.Chain, err error) {
+	if err = chain.DecodeBytes(encodedChain); err != nil {
+		return
+	}
+	for _, rule := range chain.Rules {
+		for _, name := range rule.Resources.Names {
+			if err = ape.ValidateResourceName(name); err != nil {
+				err = fmt.Errorf("invalid resource: %w", err)
+				return
+			}
+		}
+	}
+	return
+}