From 5e1e220988677aa166738ad1f6194e8ea4132744 Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Mon, 22 Jun 2020 17:26:59 +0300
Subject: [PATCH 1/9] service: sign requests on the principle of Matryoshka

This commit changes SignRequestData / VerifyRequestData functions to
add the list of previous public keys to a signed message for all
requests.
---
 service/sign.go      | 20 +++++++++++++++---
 service/sign_test.go | 48 ++++++++++++++++++++++++++++++------------
 service/types.go     |  1 +
 service/verify.go    | 50 ++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 103 insertions(+), 16 deletions(-)

diff --git a/service/sign.go b/service/sign.go
index 50453b9..796a4cd 100644
--- a/service/sign.go
+++ b/service/sign.go
@@ -137,11 +137,24 @@ func verifySignatures(src SignedDataSource, items ...SignKeyPair) error {
 	}
 	defer bytesPool.Put(data)
 
-	for _, signKey := range items {
+	for i := range items {
+		if i > 0 {
+			// add previous key bytes to the signed message
+
+			signKeyDataSrc := SignKeyPairsSignedData(items[i-1])
+
+			signKeyData, err := signKeyDataSrc.SignedData()
+			if err != nil {
+				return errors.Wrapf(err, "could not get signed data of key-signature #%d", i)
+			}
+
+			data = append(data, signKeyData...)
+		}
+
 		if err := crypto.Verify(
-			signKey.GetPublicKey(),
+			items[i].GetPublicKey(),
 			data,
-			signKey.GetSignature(),
+			items[i].GetSignature(),
 		); err != nil {
 			return err
 		}
@@ -213,6 +226,7 @@ func SignRequestData(key *ecdsa.PrivateKey, src RequestSignedData) error {
 			src.GetBearerToken(),
 		),
 		ExtendedHeadersSignedData(src),
+		SignKeyPairsSignedData(src.GetSignKeyPairs()...),
 	)
 	if err != nil {
 		return err
diff --git a/service/sign_test.go b/service/sign_test.go
index 6f1e913..3c54e8c 100644
--- a/service/sign_test.go
+++ b/service/sign_test.go
@@ -15,13 +15,13 @@ import (
 type testSignedDataSrc struct {
 	err   error
 	data  []byte
-	sig   []byte
-	key   *ecdsa.PublicKey
 	token SessionToken
 
 	bearer BearerToken
 
 	extHdrs []ExtendedHeader
+
+	signKeys []SignKeyPair
 }
 
 type testSignedDataReader struct {
@@ -29,13 +29,15 @@ type testSignedDataReader struct {
 }
 
 func (s testSignedDataSrc) GetSignature() []byte {
-	return s.sig
+	if len(s.signKeys) > 0 {
+		return s.signKeys[0].GetSignature()
+	}
+
+	return nil
 }
 
 func (s testSignedDataSrc) GetSignKeyPairs() []SignKeyPair {
-	return []SignKeyPair{
-		newSignatureKeyPair(s.key, s.sig),
-	}
+	return s.signKeys
 }
 
 func (s testSignedDataSrc) SignedData() ([]byte, error) {
@@ -43,8 +45,9 @@ func (s testSignedDataSrc) SignedData() ([]byte, error) {
 }
 
 func (s *testSignedDataSrc) AddSignKey(sig []byte, key *ecdsa.PublicKey) {
-	s.key = key
-	s.sig = sig
+	s.signKeys = append(s.signKeys,
+		newSignatureKeyPair(key, sig),
+	)
 }
 
 func testData(t *testing.T, sz int) []byte {
@@ -209,23 +212,27 @@ func TestVerifyAccumulatedSignatures(t *testing.T) {
 	// create test private key
 	sk := test.DecodeKey(0)
 
+	signKey := new(RequestVerificationHeader_Signature)
+	signKey.Peer = crypto.MarshalPublicKey(&sk.PublicKey)
+
 	// create signature source
 	src := &testSignedDataSrc{
 		data: testData(t, 10),
-		key:  &sk.PublicKey,
+
+		signKeys: []SignKeyPair{signKey},
 	}
 
 	var err error
 
 	// calculate a signature
-	src.sig, err = crypto.Sign(sk, src.data)
+	signKey.Sign, err = crypto.Sign(sk, src.data)
 	require.NoError(t, err)
 
 	// ascertain that verification is passed
 	require.NoError(t, VerifyAccumulatedSignatures(src))
 
 	// break the signature
-	src.sig[0]++
+	signKey.Sign[0]++
 
 	// ascertain that verification is failed
 	require.Error(t, VerifyAccumulatedSignatures(src))
@@ -238,9 +245,13 @@ func TestVerifySignatureWithKey(t *testing.T) {
 		ErrEmptyDataWithSignature.Error(),
 	)
 
+	signKey := new(RequestVerificationHeader_Signature)
+
 	// create test signature source
 	src := &testSignedDataSrc{
 		data: testData(t, 10),
+
+		signKeys: []SignKeyPair{signKey},
 	}
 
 	// nil public key
@@ -255,14 +266,14 @@ func TestVerifySignatureWithKey(t *testing.T) {
 	var err error
 
 	// calculate a signature
-	src.sig, err = crypto.Sign(sk, src.data)
+	signKey.Sign, err = crypto.Sign(sk, src.data)
 	require.NoError(t, err)
 
 	// ascertain that verification is passed
 	require.NoError(t, VerifySignatureWithKey(&sk.PublicKey, src))
 
 	// break the signature
-	src.sig[0]++
+	signKey.Sign[0]++
 
 	// ascertain that verification is failed
 	require.Error(t, VerifySignatureWithKey(&sk.PublicKey, src))
@@ -375,4 +386,15 @@ func TestSignVerifyRequestData(t *testing.T) {
 
 	// ascertain that verification is passed
 	require.NoError(t, VerifyRequestData(rdr))
+
+	if len(rdr.GetSignKeyPairs()) < 2 {
+		// add one more signature
+		require.NoError(t, SignRequestData(test.DecodeKey(1), rdr))
+	}
+
+	// change key-signature order
+	rdr.signKeys[0], rdr.signKeys[1] = rdr.signKeys[1], rdr.signKeys[0]
+
+	// ascertain that verification is failed
+	require.Error(t, VerifyRequestData(src))
 }
diff --git a/service/types.go b/service/types.go
index 75a5a0a..785a30a 100644
--- a/service/types.go
+++ b/service/types.go
@@ -262,6 +262,7 @@ type RequestData interface {
 type RequestSignedData interface {
 	RequestData
 	SignKeyPairAccumulator
+	SignKeyPairSource
 }
 
 // RequestVerifyData is an interface of request information with signature read access.
diff --git a/service/verify.go b/service/verify.go
index e1caa06..7691220 100644
--- a/service/verify.go
+++ b/service/verify.go
@@ -2,11 +2,16 @@ package service
 
 import (
 	"crypto/ecdsa"
+	"io"
 
 	"github.com/nspcc-dev/neofs-api-go/internal"
 	crypto "github.com/nspcc-dev/neofs-crypto"
 )
 
+type signKeyPairsWrapper struct {
+	items []SignKeyPair
+}
+
 // GetSessionToken returns SessionToken interface of Token field.
 //
 // If token field value is nil, nil returns.
@@ -114,3 +119,48 @@ func (m RequestVerificationHeader) GetBearerToken() BearerToken {
 
 	return nil
 }
+
+// SignKeyPairsSignedData wraps passed SignKeyPair slice and returns SignedDataSource interface.
+func SignKeyPairsSignedData(v ...SignKeyPair) SignedDataSource {
+	return &signKeyPairsWrapper{
+		items: v,
+	}
+}
+
+// SignedData returns signed SignKeyPair slice in a binary representation.
+func (s signKeyPairsWrapper) SignedData() ([]byte, error) {
+	return SignedDataFromReader(s)
+}
+
+// SignedDataSize returns the length of signed SignKeyPair slice.
+func (s signKeyPairsWrapper) SignedDataSize() (sz int) {
+	for i := range s.items {
+		// add key length
+		sz += len(
+			crypto.MarshalPublicKey(s.items[i].GetPublicKey()),
+		)
+	}
+
+	return
+}
+
+// ReadSignedData copies a binary representation of the signed SignKeyPair slice to passed buffer.
+//
+// If buffer length is less than required, io.ErrUnexpectedEOF returns.
+func (s signKeyPairsWrapper) ReadSignedData(p []byte) (int, error) {
+	sz := s.SignedDataSize()
+	if len(p) < sz {
+		return 0, io.ErrUnexpectedEOF
+	}
+
+	off := 0
+
+	for i := range s.items {
+		// copy public key bytes
+		off += copy(p[off:], crypto.MarshalPublicKey(
+			s.items[i].GetPublicKey(),
+		))
+	}
+
+	return off, nil
+}

From 1dd4d48b5f8057cfc69df599403d4087fe61cf35 Mon Sep 17 00:00:00 2001
From: Pavel Korotkov <pkorotkov@gmail.com>
Date: Tue, 7 Jul 2020 18:13:56 +0300
Subject: [PATCH 2/9] alc: add a rich functionality to manage Extended ACL

---
 acl/action.go        |  38 ++++
 acl/action_test.go   |  76 +++++++
 acl/extended.go      | 120 +++++++++++
 acl/header.go        | 290 +++++++++++++++++++++++++
 acl/headers_test.go  |  59 +++++
 acl/match.go         |  29 +++
 acl/match_test.go    |  44 ++++
 acl/types.go         |  56 +++++
 acl/types.pb.go      | Bin 3241 -> 37624 bytes
 acl/types.proto      |  79 +++++++
 acl/wrappers.go      | 498 +++++++++++++++++++++++++++++++++++++++++++
 acl/wrappers_test.go | 139 ++++++++++++
 12 files changed, 1428 insertions(+)
 create mode 100644 acl/action.go
 create mode 100644 acl/action_test.go
 create mode 100644 acl/extended.go
 create mode 100644 acl/header.go
 create mode 100644 acl/headers_test.go
 create mode 100644 acl/match.go
 create mode 100644 acl/match_test.go
 create mode 100644 acl/types.go
 create mode 100644 acl/wrappers.go
 create mode 100644 acl/wrappers_test.go

diff --git a/acl/action.go b/acl/action.go
new file mode 100644
index 0000000..b2986e2
--- /dev/null
+++ b/acl/action.go
@@ -0,0 +1,38 @@
+package acl
+
+// RequestInfo is an interface of request information needed for extended ACL check.
+type RequestInfo interface {
+	TypedHeaderSource
+
+	// Must return the binary representation of request initiator's key.
+	Key() []byte
+
+	// Must return true if request corresponds to operation type.
+	TypeOf(OperationType) bool
+
+	// Must return true if request has passed target.
+	TargetOf(Target) bool
+}
+
+// ExtendedACLChecker is an interface of extended ACL checking tool.
+type ExtendedACLChecker interface {
+	// Must return an action according to the results of applying the ACL table rules to request.
+	//
+	// Must return ActionUndefined if it is unable to explicitly calculate the action.
+	Action(ExtendedACLTable, RequestInfo) ExtendedACLAction
+}
+
+type extendedACLChecker struct{}
+
+const (
+	// ActionUndefined is ExtendedACLAction used to mark value as undefined.
+	// Most of the tools consider ActionUndefined as incalculable.
+	// Using ActionUndefined in ExtendedACLRecord is unsafe.
+	ActionUndefined ExtendedACLAction = iota
+
+	// ActionAllow is ExtendedACLAction used to mark an applicability of ACL rule.
+	ActionAllow
+
+	// ActionDeny is ExtendedACLAction used to mark an inapplicability of ACL rule.
+	ActionDeny
+)
diff --git a/acl/action_test.go b/acl/action_test.go
new file mode 100644
index 0000000..83022e3
--- /dev/null
+++ b/acl/action_test.go
@@ -0,0 +1,76 @@
+package acl
+
+type testExtendedACLTable struct {
+	records []ExtendedACLRecord
+}
+
+type testRequestInfo struct {
+	headers []TypedHeader
+	key     []byte
+	opType  OperationType
+	target  Target
+}
+
+type testEACLRecord struct {
+	opType  OperationType
+	filters []HeaderFilter
+	targets []ExtendedACLTarget
+	action  ExtendedACLAction
+}
+
+type testEACLTarget struct {
+	target Target
+	keys   [][]byte
+}
+
+func (s testEACLTarget) Target() Target {
+	return s.target
+}
+
+func (s testEACLTarget) KeyList() [][]byte {
+	return s.keys
+}
+
+func (s testEACLRecord) OperationType() OperationType {
+	return s.opType
+}
+
+func (s testEACLRecord) HeaderFilters() []HeaderFilter {
+	return s.filters
+}
+
+func (s testEACLRecord) TargetList() []ExtendedACLTarget {
+	return s.targets
+}
+
+func (s testEACLRecord) Action() ExtendedACLAction {
+	return s.action
+}
+
+func (s testRequestInfo) HeadersOfType(typ HeaderType) ([]Header, bool) {
+	res := make([]Header, 0, len(s.headers))
+
+	for i := range s.headers {
+		if s.headers[i].HeaderType() == typ {
+			res = append(res, s.headers[i])
+		}
+	}
+
+	return res, true
+}
+
+func (s testRequestInfo) Key() []byte {
+	return s.key
+}
+
+func (s testRequestInfo) TypeOf(t OperationType) bool {
+	return s.opType == t
+}
+
+func (s testRequestInfo) TargetOf(t Target) bool {
+	return s.target == t
+}
+
+func (s testExtendedACLTable) Records() []ExtendedACLRecord {
+	return s.records
+}
diff --git a/acl/extended.go b/acl/extended.go
new file mode 100644
index 0000000..61ccbcf
--- /dev/null
+++ b/acl/extended.go
@@ -0,0 +1,120 @@
+package acl
+
+import (
+	"context"
+
+	"github.com/nspcc-dev/neofs-api-go/refs"
+)
+
+// OperationType is an enumeration of operation types for extended ACL.
+type OperationType uint32
+
+// HeaderType is an enumeration of header types for extended ACL.
+type HeaderType uint32
+
+// MatchType is an enumeration of match types for extended ACL.
+type MatchType uint32
+
+// ExtendedACLAction is an enumeration of extended ACL actions.
+type ExtendedACLAction uint32
+
+// Header is an interface of string key-value pair,
+type Header interface {
+	// Must return string identifier of header.
+	Name() string
+
+	// Must return string value of header.
+	Value() string
+}
+
+// TypedHeader is an interface of Header and HeaderType pair.
+type TypedHeader interface {
+	Header
+
+	// Must return type of filtered header.
+	HeaderType() HeaderType
+}
+
+// TypedHeaderSource is a various types of header set interface.
+type TypedHeaderSource interface {
+	// Must return list of Header of particular type.
+	// Must return false if there is no ability to compose header list.
+	HeadersOfType(HeaderType) ([]Header, bool)
+}
+
+// HeaderFilter is an interface of grouped information about filtered header.
+type HeaderFilter interface {
+	// Must return match type of filter.
+	MatchType() MatchType
+
+	TypedHeader
+}
+
+// ExtendedACLTarget is an interface of grouped information about extended ACL rule target.
+type ExtendedACLTarget interface {
+	// Must return ACL target type.
+	Target() Target
+
+	// Must return public key list of ACL targets.
+	KeyList() [][]byte
+}
+
+// ExtendedACLRecord is an interface of record of extended ACL rule table.
+type ExtendedACLRecord interface {
+	// Must return operation type of extended ACL rule.
+	OperationType() OperationType
+
+	// Must return list of header filters of extended ACL rule.
+	HeaderFilters() []HeaderFilter
+
+	// Must return target list of extended ACL rule.
+	TargetList() []ExtendedACLTarget
+
+	// Must return action of extended ACL rule.
+	Action() ExtendedACLAction
+}
+
+// ExtendedACLTable is an interface of extended ACL table.
+type ExtendedACLTable interface {
+	// Must return list of extended ACL rules.
+	Records() []ExtendedACLRecord
+}
+
+// ExtendedACLSource is an interface of storage of extended ACL tables with read access.
+type ExtendedACLSource interface {
+	// Must return extended ACL table by container ID key.
+	GetExtendedACLTable(context.Context, refs.CID) (ExtendedACLTable, error)
+}
+
+// ExtendedACLStore is an interface of storage of extended ACL tables.
+type ExtendedACLStore interface {
+	ExtendedACLSource
+
+	// Must store extended ACL table for container ID key.
+	PutExtendedACLTable(context.Context, refs.CID, ExtendedACLTable) error
+}
+
+const (
+	_ OperationType = iota
+
+	// OpTypeGet is an OperationType for object.Get RPC
+	OpTypeGet
+
+	// OpTypePut is an OperationType for object.Put RPC
+	OpTypePut
+
+	// OpTypeHead is an OperationType for object.Head RPC
+	OpTypeHead
+
+	// OpTypeSearch is an OperationType for object.Search RPC
+	OpTypeSearch
+
+	// OpTypeDelete is an OperationType for object.Delete RPC
+	OpTypeDelete
+
+	// OpTypeRange is an OperationType for object.GetRange RPC
+	OpTypeRange
+
+	// OpTypeRangeHash is an OperationType for object.GetRangeHash RPC
+	OpTypeRangeHash
+)
diff --git a/acl/header.go b/acl/header.go
new file mode 100644
index 0000000..9dff79e
--- /dev/null
+++ b/acl/header.go
@@ -0,0 +1,290 @@
+package acl
+
+import (
+	"strconv"
+
+	"github.com/nspcc-dev/neofs-api-go/object"
+	"github.com/nspcc-dev/neofs-api-go/service"
+)
+
+type objectHeaderSource struct {
+	obj *object.Object
+}
+
+type typedHeader struct {
+	n string
+	v string
+	t HeaderType
+}
+
+type extendedHeadersWrapper struct {
+	hdrSrc service.ExtendedHeadersSource
+}
+
+type typedExtendedHeader struct {
+	hdr service.ExtendedHeader
+}
+
+const (
+	_ HeaderType = iota
+
+	// HdrTypeRequest is a HeaderType for request header.
+	HdrTypeRequest
+
+	// HdrTypeObjSys is a HeaderType for system headers of object.
+	HdrTypeObjSys
+
+	// HdrTypeObjUsr is a HeaderType for user headers of object.
+	HdrTypeObjUsr
+)
+
+const (
+	// HdrObjSysNameID is a name of ID field in system header of object.
+	HdrObjSysNameID = "ID"
+
+	// HdrObjSysNameCID is a name of CID field in system header of object.
+	HdrObjSysNameCID = "CID"
+
+	// HdrObjSysNameOwnerID is a name of OwnerID field in system header of object.
+	HdrObjSysNameOwnerID = "OWNER_ID"
+
+	// HdrObjSysNameVersion is a name of Version field in system header of object.
+	HdrObjSysNameVersion = "VERSION"
+
+	// HdrObjSysNamePayloadLength is a name of PayloadLength field in system header of object.
+	HdrObjSysNamePayloadLength = "PAYLOAD_LENGTH"
+
+	// HdrObjSysNameCreatedUnix is a name of CreatedAt.UnitTime field in system header of object.
+	HdrObjSysNameCreatedUnix = "CREATED_UNIX"
+
+	// HdrObjSysNameCreatedEpoch is a name of CreatedAt.Epoch field in system header of object.
+	HdrObjSysNameCreatedEpoch = "CREATED_EPOCH"
+
+	// HdrObjSysLinkPrev is a name of previous link header in extended headers of object.
+	HdrObjSysLinkPrev = "LINK_PREV"
+
+	// HdrObjSysLinkNext is a name of next link header in extended headers of object.
+	HdrObjSysLinkNext = "LINK_NEXT"
+
+	// HdrObjSysLinkChild is a name of child link header in extended headers of object.
+	HdrObjSysLinkChild = "LINK_CHILD"
+
+	// HdrObjSysLinkPar is a name of parent link header in extended headers of object.
+	HdrObjSysLinkPar = "LINK_PAR"
+
+	// HdrObjSysLinkSG is a name of storage group link header in extended headers of object.
+	HdrObjSysLinkSG = "LINK_SG"
+)
+
+func newTypedHeader(name, value string, typ HeaderType) TypedHeader {
+	return &typedHeader{
+		n: name,
+		v: value,
+		t: typ,
+	}
+}
+
+// Name is a name field getter.
+func (s typedHeader) Name() string {
+	return s.n
+}
+
+// Value is a value field getter.
+func (s typedHeader) Value() string {
+	return s.v
+}
+
+// HeaderType is a type field getter.
+func (s typedHeader) HeaderType() HeaderType {
+	return s.t
+}
+
+// TypedHeaderSourceFromObject wraps passed object and returns TypedHeaderSource interface.
+func TypedHeaderSourceFromObject(obj *object.Object) TypedHeaderSource {
+	return &objectHeaderSource{
+		obj: obj,
+	}
+}
+
+// HeaderOfType gathers object headers of passed type and returns Header list.
+//
+// If value of some header can not be calculated (e.g. nil extended header), it does not appear in list.
+//
+// Always returns true.
+func (s objectHeaderSource) HeadersOfType(typ HeaderType) ([]Header, bool) {
+	if s.obj == nil {
+		return nil, true
+	}
+
+	var res []Header
+
+	switch typ {
+	case HdrTypeObjUsr:
+		objHeaders := s.obj.GetHeaders()
+
+		res = make([]Header, 0, len(objHeaders)) // 7 system header fields
+
+		for _, extHdr := range objHeaders {
+			if h := newTypedObjectExtendedHeader(extHdr); h != nil {
+				res = append(res, h)
+			}
+		}
+	case HdrTypeObjSys:
+		res = make([]Header, 0, 7)
+
+		sysHdr := s.obj.GetSystemHeader()
+
+		// ID
+		res = append(res, newTypedHeader(
+			HdrObjSysNameID,
+			sysHdr.ID.String(),
+			HdrTypeObjSys),
+		)
+
+		// CID
+		res = append(res, newTypedHeader(
+			HdrObjSysNameCID,
+			sysHdr.CID.String(),
+			HdrTypeObjSys),
+		)
+
+		// OwnerID
+		res = append(res, newTypedHeader(
+			HdrObjSysNameOwnerID,
+			sysHdr.OwnerID.String(),
+			HdrTypeObjSys),
+		)
+
+		// Version
+		res = append(res, newTypedHeader(
+			HdrObjSysNameVersion,
+			strconv.FormatUint(sysHdr.GetVersion(), 10),
+			HdrTypeObjSys),
+		)
+
+		// PayloadLength
+		res = append(res, newTypedHeader(
+			HdrObjSysNamePayloadLength,
+			strconv.FormatUint(sysHdr.GetPayloadLength(), 10),
+			HdrTypeObjSys),
+		)
+
+		created := sysHdr.GetCreatedAt()
+
+		// CreatedAt.UnitTime
+		res = append(res, newTypedHeader(
+			HdrObjSysNameCreatedUnix,
+			strconv.FormatUint(uint64(created.GetUnixTime()), 10),
+			HdrTypeObjSys),
+		)
+
+		// CreatedAt.Epoch
+		res = append(res, newTypedHeader(
+			HdrObjSysNameCreatedEpoch,
+			strconv.FormatUint(created.GetEpoch(), 10),
+			HdrTypeObjSys),
+		)
+	}
+
+	return res, true
+}
+
+func newTypedObjectExtendedHeader(h object.Header) TypedHeader {
+	val := h.GetValue()
+	if val == nil {
+		return nil
+	}
+
+	res := new(typedHeader)
+	res.t = HdrTypeObjSys
+
+	switch hdr := val.(type) {
+	case *object.Header_UserHeader:
+		if hdr.UserHeader == nil {
+			return nil
+		}
+
+		res.t = HdrTypeObjUsr
+		res.n = hdr.UserHeader.GetKey()
+		res.v = hdr.UserHeader.GetValue()
+	case *object.Header_Link:
+		if hdr.Link == nil {
+			return nil
+		}
+
+		switch hdr.Link.GetType() {
+		case object.Link_Previous:
+			res.n = HdrObjSysLinkPrev
+		case object.Link_Next:
+			res.n = HdrObjSysLinkNext
+		case object.Link_Child:
+			res.n = HdrObjSysLinkChild
+		case object.Link_Parent:
+			res.n = HdrObjSysLinkPar
+		case object.Link_StorageGroup:
+			res.n = HdrObjSysLinkSG
+		default:
+			return nil
+		}
+
+		res.v = hdr.Link.ID.String()
+	default:
+		return nil
+	}
+
+	return res
+}
+
+// TypedHeaderSourceFromExtendedHeaders wraps passed ExtendedHeadersSource and returns TypedHeaderSource interface.
+func TypedHeaderSourceFromExtendedHeaders(hdrSrc service.ExtendedHeadersSource) TypedHeaderSource {
+	return &extendedHeadersWrapper{
+		hdrSrc: hdrSrc,
+	}
+}
+
+// Name returns the result of Key method.
+func (s typedExtendedHeader) Name() string {
+	return s.hdr.Key()
+}
+
+// Value returns the result of Value method.
+func (s typedExtendedHeader) Value() string {
+	return s.hdr.Value()
+}
+
+// HeaderType always returns HdrTypeRequest.
+func (s typedExtendedHeader) HeaderType() HeaderType {
+	return HdrTypeRequest
+}
+
+// TypedHeaders gathers extended request headers and returns TypedHeader list.
+//
+// Nil headers are ignored.
+//
+// Always returns true.
+func (s extendedHeadersWrapper) HeadersOfType(typ HeaderType) ([]Header, bool) {
+	if s.hdrSrc == nil {
+		return nil, true
+	}
+
+	var res []Header
+
+	switch typ {
+	case HdrTypeRequest:
+		hs := s.hdrSrc.ExtendedHeaders()
+
+		res = make([]Header, 0, len(hs))
+
+		for i := range hs {
+			if hs[i] == nil {
+				continue
+			}
+
+			res = append(res, &typedExtendedHeader{
+				hdr: hs[i],
+			})
+		}
+	}
+
+	return res, true
+}
diff --git a/acl/headers_test.go b/acl/headers_test.go
new file mode 100644
index 0000000..500d9a4
--- /dev/null
+++ b/acl/headers_test.go
@@ -0,0 +1,59 @@
+package acl
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neofs-api-go/object"
+	"github.com/stretchr/testify/require"
+)
+
+func TestNewTypedObjectExtendedHeader(t *testing.T) {
+	var res TypedHeader
+
+	hdr := object.Header{}
+
+	// nil value
+	require.Nil(t, newTypedObjectExtendedHeader(hdr))
+
+	// UserHeader
+	{
+		key := "key"
+		val := "val"
+		hdr.Value = &object.Header_UserHeader{
+			UserHeader: &object.UserHeader{
+				Key:   key,
+				Value: val,
+			},
+		}
+
+		res = newTypedObjectExtendedHeader(hdr)
+		require.Equal(t, HdrTypeObjUsr, res.HeaderType())
+		require.Equal(t, key, res.Name())
+		require.Equal(t, val, res.Value())
+	}
+
+	{ // Link
+		link := new(object.Link)
+		link.ID = object.ID{1, 2, 3}
+
+		hdr.Value = &object.Header_Link{
+			Link: link,
+		}
+
+		check := func(lt object.Link_Type, name string) {
+			link.Type = lt
+
+			res = newTypedObjectExtendedHeader(hdr)
+
+			require.Equal(t, HdrTypeObjSys, res.HeaderType())
+			require.Equal(t, name, res.Name())
+			require.Equal(t, link.ID.String(), res.Value())
+		}
+
+		check(object.Link_Previous, HdrObjSysLinkPrev)
+		check(object.Link_Next, HdrObjSysLinkNext)
+		check(object.Link_Parent, HdrObjSysLinkPar)
+		check(object.Link_Child, HdrObjSysLinkChild)
+		check(object.Link_StorageGroup, HdrObjSysLinkSG)
+	}
+}
diff --git a/acl/match.go b/acl/match.go
new file mode 100644
index 0000000..bddee89
--- /dev/null
+++ b/acl/match.go
@@ -0,0 +1,29 @@
+package acl
+
+const (
+	_ MatchType = iota
+	StringEqual
+	StringNotEqual
+)
+
+// Maps MatchType to corresponding function.
+// 1st argument of function - header value, 2nd - header filter.
+var mMatchFns = map[MatchType]func(Header, Header) bool{
+	StringEqual: stringEqual,
+
+	StringNotEqual: stringNotEqual,
+}
+
+const (
+	mResUndefined = iota
+	mResMatch
+	mResMismatch
+)
+
+func stringEqual(header, filter Header) bool {
+	return header.Value() == filter.Value()
+}
+
+func stringNotEqual(header, filter Header) bool {
+	return header.Value() != filter.Value()
+}
diff --git a/acl/match_test.go b/acl/match_test.go
new file mode 100644
index 0000000..6975722
--- /dev/null
+++ b/acl/match_test.go
@@ -0,0 +1,44 @@
+package acl
+
+type testTypedHeader struct {
+	t HeaderType
+	k string
+	v string
+}
+
+type testHeaderSrc struct {
+	hs []TypedHeader
+}
+
+type testHeaderFilter struct {
+	TypedHeader
+	t MatchType
+}
+
+func (s testHeaderFilter) MatchType() MatchType {
+	return s.t
+}
+
+func (s testHeaderSrc) HeadersOfType(typ HeaderType) ([]Header, bool) {
+	res := make([]Header, 0, len(s.hs))
+
+	for i := range s.hs {
+		if s.hs[i].HeaderType() == typ {
+			res = append(res, s.hs[i])
+		}
+	}
+
+	return res, true
+}
+
+func (s testTypedHeader) Name() string {
+	return s.k
+}
+
+func (s testTypedHeader) Value() string {
+	return s.v
+}
+
+func (s testTypedHeader) HeaderType() HeaderType {
+	return s.t
+}
diff --git a/acl/types.go b/acl/types.go
new file mode 100644
index 0000000..0587b9b
--- /dev/null
+++ b/acl/types.go
@@ -0,0 +1,56 @@
+package acl
+
+// SetMatchType is MatchType field setter.
+func (m *EACLRecord_FilterInfo) SetMatchType(v EACLRecord_FilterInfo_MatchType) {
+	m.MatchType = v
+}
+
+// SetHeader is a Header field setter.
+func (m *EACLRecord_FilterInfo) SetHeader(v EACLRecord_FilterInfo_Header) {
+	m.Header = v
+}
+
+// SetHeaderName is a HeaderName field setter.
+func (m *EACLRecord_FilterInfo) SetHeaderName(v string) {
+	m.HeaderName = v
+}
+
+// SetHeaderVal is a HeaderVal field setter.
+func (m *EACLRecord_FilterInfo) SetHeaderVal(v string) {
+	m.HeaderVal = v
+}
+
+// SetTarget is a Target field setter.
+func (m *EACLRecord_TargetInfo) SetTarget(v Target) {
+	m.Target = v
+}
+
+// SetKeyList is a KeyList field setter.
+func (m *EACLRecord_TargetInfo) SetKeyList(v [][]byte) {
+	m.KeyList = v
+}
+
+// SetOperation is an Operation field setter.
+func (m *EACLRecord) SetOperation(v EACLRecord_Operation) {
+	m.Operation = v
+}
+
+// SetAction is an Action field setter.
+func (m *EACLRecord) SetAction(v EACLRecord_Action) {
+	m.Action = v
+}
+
+// SetFilters is a Filters field setter.
+func (m *EACLRecord) SetFilters(v []*EACLRecord_FilterInfo) {
+	m.Filters = v
+}
+
+// SetTargets is a Targets field setter.
+func (m *EACLRecord) SetTargets(v []*EACLRecord_TargetInfo) {
+	m.Targets = v
+}
+
+// SetRecords is a Records field setter.
+func (m *EACLTable) SetRecords(v []*EACLRecord) {
+	m.Records = v
+}
diff --git a/acl/types.pb.go b/acl/types.pb.go
index bcbd1998e272c6b48d814cc10e11139b235079c4..24ecf2814a556e10d7cb3b1a23647c4150bebd37 100644
GIT binary patch
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diff --git a/acl/types.proto b/acl/types.proto
index f20423f..6934b36 100644
--- a/acl/types.proto
+++ b/acl/types.proto
@@ -25,3 +25,82 @@ enum Target {
     // extended ACL.
     PubKey  = 4;
 }
+
+// EACLRecord groups information about extended ACL rule.
+message EACLRecord {
+    // Operation is an enumeration of operation types.
+    enum Operation {
+        OPERATION_UNKNOWN = 0;
+        GET = 1;
+        HEAD = 2;
+        PUT = 3;
+        DELETE = 4;
+        SEARCH = 5;
+        GETRANGE = 6;
+        GETRANGEHASH = 7;
+    }
+
+    // Operation carries type of operation.
+    Operation operation = 1 [(gogoproto.customname) = "Operation", json_name="Operation"];
+
+    // Action is an enumeration of EACL actions.
+    enum Action {
+        ActionUnknown = 0;
+        Allow = 1;
+        Deny = 2;
+    }
+
+    // Action carries ACL target action.
+    Action action = 2 [(gogoproto.customname) = "Action", json_name="Action"];
+
+    // FilterInfo groups information about filter.
+    message FilterInfo {
+        // Header is an enumeration of filtering header types.
+        enum Header {
+            HeaderUnknown = 0;
+            Request = 1;
+            ObjectSystem = 2;
+            ObjectUser = 3;
+        }
+
+        // Header carries type of header.
+        Header header = 1 [(gogoproto.customname) = "Header", json_name="HeaderType"];
+
+        // MatchType is an enumeration of match types.
+        enum MatchType {
+            MatchUnknown = 0;
+            StringEqual = 1;
+            StringNotEqual = 2;
+        }
+
+        // MatchType carries type of match.
+        MatchType matchType = 2 [(gogoproto.customname) = "MatchType", json_name="MatchType"];
+
+        // HeaderName carries name of filtering header.
+        string HeaderName = 3 [json_name="Name"];
+
+        // HeaderVal carries value of filtering header.
+        string HeaderVal = 4 [json_name="Value"];
+    }
+
+    // Filters carries set of filters.
+    repeated FilterInfo Filters = 3 [json_name="Filters"];
+
+    // TargetInfo groups information about extended ACL target.
+    message TargetInfo {
+        // Target carries target of ACL rule.
+        acl.Target Target = 1 [json_name="Role"];
+
+        // KeyList carries public keys of ACL target.
+        repeated bytes KeyList = 2 [json_name="Keys"];
+    }
+
+    // Targets carries information about extended ACL target list.
+    repeated TargetInfo Targets = 4 [json_name="Targets"];
+}
+
+// EACLRecord carries the information about extended ACL rules.
+message EACLTable {
+    // Records carries list of extended ACL rule records.
+    repeated EACLRecord Records = 1 [json_name="Records"];
+}
\ No newline at end of file
diff --git a/acl/wrappers.go b/acl/wrappers.go
new file mode 100644
index 0000000..b0481f4
--- /dev/null
+++ b/acl/wrappers.go
@@ -0,0 +1,498 @@
+package acl
+
+// EACLFilterWrapper is a wrapper over EACLRecord_FilterInfo pointer.
+type EACLFilterWrapper struct {
+	filter *EACLRecord_FilterInfo
+}
+
+// EACLTargetWrapper is a wrapper over EACLRecord_TargetInfo pointer.
+type EACLTargetWrapper struct {
+	target *EACLRecord_TargetInfo
+}
+
+// EACLRecordWrapper is a wrapper over EACLRecord pointer.
+type EACLRecordWrapper struct {
+	record *EACLRecord
+}
+
+// EACLTableWrapper is a wrapper over EACLTable pointer.
+type EACLTableWrapper struct {
+	table *EACLTable
+}
+
+// WrapFilterInfo wraps EACLRecord_FilterInfo pointer.
+//
+// If argument is nil, new EACLRecord_FilterInfo is initialized.
+func WrapFilterInfo(v *EACLRecord_FilterInfo) EACLFilterWrapper {
+	if v == nil {
+		v = new(EACLRecord_FilterInfo)
+	}
+
+	return EACLFilterWrapper{
+		filter: v,
+	}
+}
+
+// WrapEACLTarget wraps EACLRecord_TargetInfo pointer.
+//
+// If argument is nil, new EACLRecord_TargetInfo is initialized.
+func WrapEACLTarget(v *EACLRecord_TargetInfo) EACLTargetWrapper {
+	if v == nil {
+		v = new(EACLRecord_TargetInfo)
+	}
+
+	return EACLTargetWrapper{
+		target: v,
+	}
+}
+
+// WrapEACLRecord wraps EACLRecord pointer.
+//
+// If argument is nil, new EACLRecord is initialized.
+func WrapEACLRecord(v *EACLRecord) EACLRecordWrapper {
+	if v == nil {
+		v = new(EACLRecord)
+	}
+
+	return EACLRecordWrapper{
+		record: v,
+	}
+}
+
+// WrapEACLTable wraps EACLTable pointer.
+//
+// If argument is nil, new EACLTable is initialized.
+func WrapEACLTable(v *EACLTable) EACLTableWrapper {
+	if v == nil {
+		v = new(EACLTable)
+	}
+
+	return EACLTableWrapper{
+		table: v,
+	}
+}
+
+// MatchType returns casted result of MatchType field getter.
+//
+// If filter is not initialized, 0 returns.
+//
+// Returns 0 if MatchType is not one of:
+//  - EACLRecord_FilterInfo_StringEqual;
+//  - EACLRecord_FilterInfo_StringNotEqual.
+func (s EACLFilterWrapper) MatchType() (res MatchType) {
+	if s.filter != nil {
+		switch s.filter.GetMatchType() {
+		case EACLRecord_FilterInfo_StringEqual:
+			res = StringEqual
+		case EACLRecord_FilterInfo_StringNotEqual:
+			res = StringNotEqual
+		}
+	}
+
+	return
+}
+
+// SetMatchType passes casted argument to MatchType field setter.
+//
+// If filter is not initialized, nothing changes.
+//
+// MatchType is set to EACLRecord_FilterInfo_MatchUnknown if argument is not one of:
+//  - StringEqual;
+//  - StringNotEqual.
+func (s EACLFilterWrapper) SetMatchType(v MatchType) {
+	if s.filter != nil {
+		switch v {
+		case StringEqual:
+			s.filter.SetMatchType(EACLRecord_FilterInfo_StringEqual)
+		case StringNotEqual:
+			s.filter.SetMatchType(EACLRecord_FilterInfo_StringNotEqual)
+		default:
+			s.filter.SetMatchType(EACLRecord_FilterInfo_MatchUnknown)
+		}
+	}
+}
+
+// Name returns the result of HeaderName field getter.
+//
+// If filter is not initialized, empty string returns.
+func (s EACLFilterWrapper) Name() string {
+	if s.filter == nil {
+		return ""
+	}
+
+	return s.filter.GetHeaderName()
+}
+
+// SetName passes argument to HeaderName field setter.
+//
+// If filter is not initialized, nothing changes.
+func (s EACLFilterWrapper) SetName(v string) {
+	if s.filter != nil {
+		s.filter.SetHeaderName(v)
+	}
+}
+
+// Value returns the result of HeaderVal field getter.
+//
+// If filter is not initialized, empty string returns.
+func (s EACLFilterWrapper) Value() string {
+	if s.filter == nil {
+		return ""
+	}
+
+	return s.filter.GetHeaderVal()
+}
+
+// SetValue passes argument to HeaderVal field setter.
+//
+// If filter is not initialized, nothing changes.
+func (s EACLFilterWrapper) SetValue(v string) {
+	if s.filter != nil {
+		s.filter.SetHeaderVal(v)
+	}
+}
+
+// HeaderType returns the result of Header field getter.
+//
+// If filter is not initialized, 0 returns.
+//
+// Returns 0 if Header is not one of:
+//  - EACLRecord_FilterInfo_Request;
+//  - EACLRecord_FilterInfo_ObjectSystem;
+//  - EACLRecord_FilterInfo_ObjectUser.
+func (s EACLFilterWrapper) HeaderType() (res HeaderType) {
+	if s.filter != nil {
+		switch s.filter.GetHeader() {
+		case EACLRecord_FilterInfo_Request:
+			res = HdrTypeRequest
+		case EACLRecord_FilterInfo_ObjectSystem:
+			res = HdrTypeObjSys
+		case EACLRecord_FilterInfo_ObjectUser:
+			res = HdrTypeObjUsr
+		}
+	}
+
+	return
+}
+
+// SetHeaderType passes casted argument to Header field setter.
+//
+// If filter is not initialized, nothing changes.
+//
+// Header is set to EACLRecord_FilterInfo_HeaderUnknown if argument is not one of:
+//  - HdrTypeRequest;
+//  - HdrTypeObjSys;
+//  - HdrTypeObjUsr.
+func (s EACLFilterWrapper) SetHeaderType(t HeaderType) {
+	if s.filter != nil {
+		switch t {
+		case HdrTypeRequest:
+			s.filter.SetHeader(EACLRecord_FilterInfo_Request)
+		case HdrTypeObjSys:
+			s.filter.SetHeader(EACLRecord_FilterInfo_ObjectSystem)
+		case HdrTypeObjUsr:
+			s.filter.SetHeader(EACLRecord_FilterInfo_ObjectUser)
+		default:
+			s.filter.SetHeader(EACLRecord_FilterInfo_HeaderUnknown)
+		}
+	}
+}
+
+// Target returns the result of Target field getter.
+//
+// If target is not initialized, Target_Unknown returns.
+func (s EACLTargetWrapper) Target() Target {
+	if s.target == nil {
+		return Target_Unknown
+	}
+
+	return s.target.GetTarget()
+}
+
+// SetTarget passes argument to Target field setter.
+//
+// If target is not initialized, nothing changes.
+func (s EACLTargetWrapper) SetTarget(v Target) {
+	if s.target != nil {
+		s.target.SetTarget(v)
+	}
+}
+
+// KeyList returns the result of KeyList field getter.
+//
+// If target is not initialized, nil returns.
+func (s EACLTargetWrapper) KeyList() [][]byte {
+	if s.target == nil {
+		return nil
+	}
+
+	return s.target.GetKeyList()
+}
+
+// SetKeyList passes argument to KeyList field setter.
+//
+// If target is not initialized, nothing changes.
+func (s EACLTargetWrapper) SetKeyList(v [][]byte) {
+	if s.target != nil {
+		s.target.SetKeyList(v)
+	}
+}
+
+// KeyList returns casted result of Operation field getter.
+//
+// If record is not initialized, 0 returns.
+//
+// Returns 0 if Operation is not one of:
+//  - EACLRecord_HEAD;
+//  - EACLRecord_PUT;
+//  - EACLRecord_SEARCH;
+//  - EACLRecord_GET;
+//  - EACLRecord_GETRANGE;
+//  - EACLRecord_GETRANGEHASH;
+//  - EACLRecord_DELETE.
+func (s EACLRecordWrapper) OperationType() (res OperationType) {
+	if s.record != nil {
+		switch s.record.GetOperation() {
+		case EACLRecord_HEAD:
+			res = OpTypeHead
+		case EACLRecord_PUT:
+			res = OpTypePut
+		case EACLRecord_SEARCH:
+			res = OpTypeSearch
+		case EACLRecord_GET:
+			res = OpTypeGet
+		case EACLRecord_GETRANGE:
+			res = OpTypeRange
+		case EACLRecord_GETRANGEHASH:
+			res = OpTypeRangeHash
+		case EACLRecord_DELETE:
+			res = OpTypeDelete
+		}
+	}
+
+	return
+}
+
+// SetOperationType passes casted argument to Operation field setter.
+//
+// If record is not initialized, nothing changes.
+//
+// Operation is set to EACLRecord_OPERATION_UNKNOWN if argument is not one of:
+//  - OpTypeHead;
+//  - OpTypePut;
+//  - OpTypeSearch;
+//  - OpTypeGet;
+//  - OpTypeRange;
+//  - OpTypeRangeHash;
+//  - OpTypeDelete.
+func (s EACLRecordWrapper) SetOperationType(v OperationType) {
+	if s.record != nil {
+		switch v {
+		case OpTypeHead:
+			s.record.SetOperation(EACLRecord_HEAD)
+		case OpTypePut:
+			s.record.SetOperation(EACLRecord_PUT)
+		case OpTypeSearch:
+			s.record.SetOperation(EACLRecord_SEARCH)
+		case OpTypeGet:
+			s.record.SetOperation(EACLRecord_GET)
+		case OpTypeRange:
+			s.record.SetOperation(EACLRecord_GETRANGE)
+		case OpTypeRangeHash:
+			s.record.SetOperation(EACLRecord_GETRANGEHASH)
+		case OpTypeDelete:
+			s.record.SetOperation(EACLRecord_DELETE)
+		default:
+			s.record.SetOperation(EACLRecord_OPERATION_UNKNOWN)
+		}
+	}
+}
+
+// Action returns casted result of Action field getter.
+//
+// If record is not initialized, 0 returns.
+//
+// Returns 0 if Action is not one of:
+//  - EACLRecord_Deny;
+//  - EACLRecord_Allow.
+func (s EACLRecordWrapper) Action() (res ExtendedACLAction) {
+	if s.record != nil {
+		switch s.record.GetAction() {
+		case EACLRecord_Deny:
+			res = ActionDeny
+		case EACLRecord_Allow:
+			res = ActionAllow
+		}
+	}
+
+	return
+}
+
+// SetAction passes casted argument to Action field setter.
+//
+// If record is not initialized, nothing changes.
+//
+// Action is set to EACLRecord_ActionUnknown if argument is not one of:
+//  - ActionDeny;
+//  - ActionAllow.
+func (s EACLRecordWrapper) SetAction(v ExtendedACLAction) {
+	if s.record != nil {
+		switch v {
+		case ActionDeny:
+			s.record.SetAction(EACLRecord_Deny)
+		case ActionAllow:
+			s.record.SetAction(EACLRecord_Allow)
+		default:
+			s.record.SetAction(EACLRecord_ActionUnknown)
+		}
+	}
+}
+
+// HeaderFilters wraps all elements from Filters field getter result and returns HeaderFilter list.
+//
+// If record is not initialized, nil returns.
+func (s EACLRecordWrapper) HeaderFilters() []HeaderFilter {
+	if s.record == nil {
+		return nil
+	}
+
+	filters := s.record.GetFilters()
+
+	res := make([]HeaderFilter, 0, len(filters))
+
+	for i := range filters {
+		res = append(res, WrapFilterInfo(filters[i]))
+	}
+
+	return res
+}
+
+// SetHeaderFilters converts HeaderFilter list to EACLRecord_FilterInfo list and passes it to Filters field setter.
+//
+// Ignores nil elements of argument.
+// If record is not initialized, nothing changes.
+func (s EACLRecordWrapper) SetHeaderFilters(v []HeaderFilter) {
+	if s.record == nil {
+		return
+	}
+
+	filters := make([]*EACLRecord_FilterInfo, 0, len(v))
+
+	for i := range v {
+		if v[i] == nil {
+			continue
+		}
+
+		w := WrapFilterInfo(nil)
+		w.SetMatchType(v[i].MatchType())
+		w.SetHeaderType(v[i].HeaderType())
+		w.SetName(v[i].Name())
+		w.SetValue(v[i].Value())
+
+		filters = append(filters, w.filter)
+	}
+
+	s.record.SetFilters(filters)
+}
+
+// TargetList wraps all elements from Targets field getter result and returns ExtendedACLTarget list.
+//
+// If record is not initialized, nil returns.
+func (s EACLRecordWrapper) TargetList() []ExtendedACLTarget {
+	if s.record == nil {
+		return nil
+	}
+
+	targets := s.record.GetTargets()
+
+	res := make([]ExtendedACLTarget, 0, len(targets))
+
+	for i := range targets {
+		res = append(res, WrapEACLTarget(targets[i]))
+	}
+
+	return res
+}
+
+// SetTargetList converts ExtendedACLTarget list to EACLRecord_TargetInfo list and passes it to Targets field setter.
+//
+// Ignores nil elements of argument.
+// If record is not initialized, nothing changes.
+func (s EACLRecordWrapper) SetTargetList(v []ExtendedACLTarget) {
+	if s.record == nil {
+		return
+	}
+
+	targets := make([]*EACLRecord_TargetInfo, 0, len(v))
+
+	for i := range v {
+		if v[i] == nil {
+			continue
+		}
+
+		w := WrapEACLTarget(nil)
+		w.SetTarget(v[i].Target())
+		w.SetKeyList(v[i].KeyList())
+
+		targets = append(targets, w.target)
+	}
+
+	s.record.SetTargets(targets)
+}
+
+// Records wraps all elements from Records field getter result and returns ExtendedACLRecord list.
+//
+// If table is not initialized, nil returns.
+func (s EACLTableWrapper) Records() []ExtendedACLRecord {
+	if s.table == nil {
+		return nil
+	}
+
+	records := s.table.GetRecords()
+
+	res := make([]ExtendedACLRecord, 0, len(records))
+
+	for i := range records {
+		res = append(res, WrapEACLRecord(records[i]))
+	}
+
+	return res
+}
+
+// SetRecords converts ExtendedACLRecord list to EACLRecord list and passes it to Records field setter.
+//
+// Ignores nil elements of argument.
+// If table is not initialized, nothing changes.
+func (s EACLTableWrapper) SetRecords(v []ExtendedACLRecord) {
+	if s.table == nil {
+		return
+	}
+
+	records := make([]*EACLRecord, 0, len(v))
+
+	for i := range v {
+		if v[i] == nil {
+			continue
+		}
+
+		w := WrapEACLRecord(nil)
+		w.SetOperationType(v[i].OperationType())
+		w.SetAction(v[i].Action())
+		w.SetHeaderFilters(v[i].HeaderFilters())
+		w.SetTargetList(v[i].TargetList())
+
+		records = append(records, w.record)
+	}
+
+	s.table.SetRecords(records)
+}
+
+// MarshalBinary returns the result of Marshal method.
+func (s EACLTableWrapper) MarshalBinary() ([]byte, error) {
+	return s.table.Marshal()
+}
+
+// UnmarshalBinary passes argument to Unmarshal method and returns its result.
+func (s EACLTableWrapper) UnmarshalBinary(data []byte) error {
+	return s.table.Unmarshal(data)
+}
diff --git a/acl/wrappers_test.go b/acl/wrappers_test.go
new file mode 100644
index 0000000..b7dbbe0
--- /dev/null
+++ b/acl/wrappers_test.go
@@ -0,0 +1,139 @@
+package acl
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestEACLFilterWrapper(t *testing.T) {
+	s := WrapFilterInfo(nil)
+
+	mt := StringEqual
+	s.SetMatchType(mt)
+	require.Equal(t, mt, s.MatchType())
+
+	ht := HdrTypeObjUsr
+	s.SetHeaderType(ht)
+	require.Equal(t, ht, s.HeaderType())
+
+	n := "name"
+	s.SetName(n)
+	require.Equal(t, n, s.Name())
+
+	v := "value"
+	s.SetValue(v)
+	require.Equal(t, v, s.Value())
+}
+
+func TestEACLTargetWrapper(t *testing.T) {
+	s := WrapEACLTarget(nil)
+
+	target := Target(10)
+	s.SetTarget(target)
+	require.Equal(t, target, s.Target())
+
+	keys := [][]byte{
+		{1, 2, 3},
+		{4, 5, 6},
+	}
+	s.SetKeyList(keys)
+	require.Equal(t, keys, s.KeyList())
+}
+
+func TestEACLRecordWrapper(t *testing.T) {
+	s := WrapEACLRecord(nil)
+
+	action := ActionAllow
+	s.SetAction(action)
+	require.Equal(t, action, s.Action())
+
+	opType := OperationType(5)
+	s.SetOperationType(opType)
+	require.Equal(t, opType, s.OperationType())
+
+	f1Name := "name1"
+	f1 := WrapFilterInfo(nil)
+	f1.SetName(f1Name)
+
+	f2Name := "name2"
+	f2 := WrapFilterInfo(nil)
+	f2.SetName(f2Name)
+
+	s.SetHeaderFilters([]HeaderFilter{f1, f2})
+
+	filters := s.HeaderFilters()
+	require.Len(t, filters, 2)
+	require.Equal(t, f1Name, filters[0].Name())
+	require.Equal(t, f2Name, filters[1].Name())
+
+	target1 := Target(1)
+	t1 := WrapEACLTarget(nil)
+	t1.SetTarget(target1)
+
+	target2 := Target(2)
+	t2 := WrapEACLTarget(nil)
+	t2.SetTarget(target2)
+
+	s.SetTargetList([]ExtendedACLTarget{t1, t2})
+
+	targets := s.TargetList()
+	require.Len(t, targets, 2)
+	require.Equal(t, target1, targets[0].Target())
+	require.Equal(t, target2, targets[1].Target())
+}
+
+func TestEACLTableWrapper(t *testing.T) {
+	s := WrapEACLTable(nil)
+
+	action1 := ExtendedACLAction(1)
+	r1 := WrapEACLRecord(nil)
+	r1.SetAction(action1)
+
+	action2 := ExtendedACLAction(2)
+	r2 := WrapEACLRecord(nil)
+	r2.SetAction(action2)
+
+	s.SetRecords([]ExtendedACLRecord{r1, r2})
+
+	records := s.Records()
+	require.Len(t, records, 2)
+	require.Equal(t, action1, records[0].Action())
+	require.Equal(t, action2, records[1].Action())
+
+	data, err := s.MarshalBinary()
+	require.NoError(t, err)
+
+	s2 := WrapEACLTable(nil)
+	require.NoError(t, s2.UnmarshalBinary(data))
+
+	records1 := s.Records()
+	records2 := s2.Records()
+	require.Len(t, records1, len(records2))
+
+	for i := range records1 {
+		require.Equal(t, records1[i].Action(), records2[i].Action())
+		require.Equal(t, records1[i].OperationType(), records2[i].OperationType())
+
+		targets1 := records1[i].TargetList()
+		targets2 := records2[i].TargetList()
+		require.Len(t, targets1, len(targets2))
+
+		for j := range targets1 {
+			require.Equal(t, targets1[j].Target(), targets2[j].Target())
+			require.Equal(t, targets1[j].KeyList(), targets2[j].KeyList())
+		}
+
+		filters1 := records1[i].HeaderFilters()
+		filters2 := records2[i].HeaderFilters()
+		require.Len(t, filters1, len(filters2))
+
+		for j := range filters1 {
+			require.Equal(t, filters1[j].MatchType(), filters2[j].MatchType())
+			require.Equal(t, filters1[j].HeaderType(), filters2[j].HeaderType())
+			require.Equal(t, filters1[j].Name(), filters2[j].Name())
+			require.Equal(t, filters1[j].Value(), filters2[j].Value())
+			require.Equal(t, filters1[j].Value(), filters2[j].Value())
+		}
+	}
+}

From ec4fb22e30f26319e162d6454d7b2b28974220bb Mon Sep 17 00:00:00 2001
From: Pavel Korotkov <pkorotkov@gmail.com>
Date: Tue, 7 Jul 2020 18:17:50 +0300
Subject: [PATCH 3/9] acl: fix an erroneous method name in comments

---
 acl/wrappers.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/acl/wrappers.go b/acl/wrappers.go
index b0481f4..30c2ee3 100644
--- a/acl/wrappers.go
+++ b/acl/wrappers.go
@@ -238,7 +238,7 @@ func (s EACLTargetWrapper) SetKeyList(v [][]byte) {
 	}
 }
 
-// KeyList returns casted result of Operation field getter.
+// OperationType returns casted result of Operation field getter.
 //
 // If record is not initialized, 0 returns.
 //

From 0db55d31ae0a24a7a603d827522d6960381b582f Mon Sep 17 00:00:00 2001
From: Pavel Korotkov <pkorotkov@gmail.com>
Date: Tue, 7 Jul 2020 19:43:16 +0300
Subject: [PATCH 4/9] acl: remove tests

---
 acl/action_test.go  | 76 ---------------------------------------------
 acl/headers_test.go | 59 -----------------------------------
 acl/match_test.go   | 44 --------------------------
 3 files changed, 179 deletions(-)
 delete mode 100644 acl/action_test.go
 delete mode 100644 acl/headers_test.go
 delete mode 100644 acl/match_test.go

diff --git a/acl/action_test.go b/acl/action_test.go
deleted file mode 100644
index 83022e3..0000000
--- a/acl/action_test.go
+++ /dev/null
@@ -1,76 +0,0 @@
-package acl
-
-type testExtendedACLTable struct {
-	records []ExtendedACLRecord
-}
-
-type testRequestInfo struct {
-	headers []TypedHeader
-	key     []byte
-	opType  OperationType
-	target  Target
-}
-
-type testEACLRecord struct {
-	opType  OperationType
-	filters []HeaderFilter
-	targets []ExtendedACLTarget
-	action  ExtendedACLAction
-}
-
-type testEACLTarget struct {
-	target Target
-	keys   [][]byte
-}
-
-func (s testEACLTarget) Target() Target {
-	return s.target
-}
-
-func (s testEACLTarget) KeyList() [][]byte {
-	return s.keys
-}
-
-func (s testEACLRecord) OperationType() OperationType {
-	return s.opType
-}
-
-func (s testEACLRecord) HeaderFilters() []HeaderFilter {
-	return s.filters
-}
-
-func (s testEACLRecord) TargetList() []ExtendedACLTarget {
-	return s.targets
-}
-
-func (s testEACLRecord) Action() ExtendedACLAction {
-	return s.action
-}
-
-func (s testRequestInfo) HeadersOfType(typ HeaderType) ([]Header, bool) {
-	res := make([]Header, 0, len(s.headers))
-
-	for i := range s.headers {
-		if s.headers[i].HeaderType() == typ {
-			res = append(res, s.headers[i])
-		}
-	}
-
-	return res, true
-}
-
-func (s testRequestInfo) Key() []byte {
-	return s.key
-}
-
-func (s testRequestInfo) TypeOf(t OperationType) bool {
-	return s.opType == t
-}
-
-func (s testRequestInfo) TargetOf(t Target) bool {
-	return s.target == t
-}
-
-func (s testExtendedACLTable) Records() []ExtendedACLRecord {
-	return s.records
-}
diff --git a/acl/headers_test.go b/acl/headers_test.go
deleted file mode 100644
index 500d9a4..0000000
--- a/acl/headers_test.go
+++ /dev/null
@@ -1,59 +0,0 @@
-package acl
-
-import (
-	"testing"
-
-	"github.com/nspcc-dev/neofs-api-go/object"
-	"github.com/stretchr/testify/require"
-)
-
-func TestNewTypedObjectExtendedHeader(t *testing.T) {
-	var res TypedHeader
-
-	hdr := object.Header{}
-
-	// nil value
-	require.Nil(t, newTypedObjectExtendedHeader(hdr))
-
-	// UserHeader
-	{
-		key := "key"
-		val := "val"
-		hdr.Value = &object.Header_UserHeader{
-			UserHeader: &object.UserHeader{
-				Key:   key,
-				Value: val,
-			},
-		}
-
-		res = newTypedObjectExtendedHeader(hdr)
-		require.Equal(t, HdrTypeObjUsr, res.HeaderType())
-		require.Equal(t, key, res.Name())
-		require.Equal(t, val, res.Value())
-	}
-
-	{ // Link
-		link := new(object.Link)
-		link.ID = object.ID{1, 2, 3}
-
-		hdr.Value = &object.Header_Link{
-			Link: link,
-		}
-
-		check := func(lt object.Link_Type, name string) {
-			link.Type = lt
-
-			res = newTypedObjectExtendedHeader(hdr)
-
-			require.Equal(t, HdrTypeObjSys, res.HeaderType())
-			require.Equal(t, name, res.Name())
-			require.Equal(t, link.ID.String(), res.Value())
-		}
-
-		check(object.Link_Previous, HdrObjSysLinkPrev)
-		check(object.Link_Next, HdrObjSysLinkNext)
-		check(object.Link_Parent, HdrObjSysLinkPar)
-		check(object.Link_Child, HdrObjSysLinkChild)
-		check(object.Link_StorageGroup, HdrObjSysLinkSG)
-	}
-}
diff --git a/acl/match_test.go b/acl/match_test.go
deleted file mode 100644
index 6975722..0000000
--- a/acl/match_test.go
+++ /dev/null
@@ -1,44 +0,0 @@
-package acl
-
-type testTypedHeader struct {
-	t HeaderType
-	k string
-	v string
-}
-
-type testHeaderSrc struct {
-	hs []TypedHeader
-}
-
-type testHeaderFilter struct {
-	TypedHeader
-	t MatchType
-}
-
-func (s testHeaderFilter) MatchType() MatchType {
-	return s.t
-}
-
-func (s testHeaderSrc) HeadersOfType(typ HeaderType) ([]Header, bool) {
-	res := make([]Header, 0, len(s.hs))
-
-	for i := range s.hs {
-		if s.hs[i].HeaderType() == typ {
-			res = append(res, s.hs[i])
-		}
-	}
-
-	return res, true
-}
-
-func (s testTypedHeader) Name() string {
-	return s.k
-}
-
-func (s testTypedHeader) Value() string {
-	return s.v
-}
-
-func (s testTypedHeader) HeaderType() HeaderType {
-	return s.t
-}

From d0f56e504448b2f820e1c79038796b2d2ac3b5cf Mon Sep 17 00:00:00 2001
From: Pavel Korotkov <pkorotkov@gmail.com>
Date: Tue, 7 Jul 2020 19:44:09 +0300
Subject: [PATCH 5/9] acl: reorganize files

---
 acl/action.go        |  38 ------
 acl/header.go        | 290 -------------------------------------------
 acl/match.go         |  29 -----
 acl/types.go         | 116 +++++++++++++++++
 acl/wrappers.go      |   8 +-
 acl/wrappers_test.go |   2 +-
 6 files changed, 121 insertions(+), 362 deletions(-)
 delete mode 100644 acl/action.go
 delete mode 100644 acl/header.go
 delete mode 100644 acl/match.go

diff --git a/acl/action.go b/acl/action.go
deleted file mode 100644
index b2986e2..0000000
--- a/acl/action.go
+++ /dev/null
@@ -1,38 +0,0 @@
-package acl
-
-// RequestInfo is an interface of request information needed for extended ACL check.
-type RequestInfo interface {
-	TypedHeaderSource
-
-	// Must return the binary representation of request initiator's key.
-	Key() []byte
-
-	// Must return true if request corresponds to operation type.
-	TypeOf(OperationType) bool
-
-	// Must return true if request has passed target.
-	TargetOf(Target) bool
-}
-
-// ExtendedACLChecker is an interface of extended ACL checking tool.
-type ExtendedACLChecker interface {
-	// Must return an action according to the results of applying the ACL table rules to request.
-	//
-	// Must return ActionUndefined if it is unable to explicitly calculate the action.
-	Action(ExtendedACLTable, RequestInfo) ExtendedACLAction
-}
-
-type extendedACLChecker struct{}
-
-const (
-	// ActionUndefined is ExtendedACLAction used to mark value as undefined.
-	// Most of the tools consider ActionUndefined as incalculable.
-	// Using ActionUndefined in ExtendedACLRecord is unsafe.
-	ActionUndefined ExtendedACLAction = iota
-
-	// ActionAllow is ExtendedACLAction used to mark an applicability of ACL rule.
-	ActionAllow
-
-	// ActionDeny is ExtendedACLAction used to mark an inapplicability of ACL rule.
-	ActionDeny
-)
diff --git a/acl/header.go b/acl/header.go
deleted file mode 100644
index 9dff79e..0000000
--- a/acl/header.go
+++ /dev/null
@@ -1,290 +0,0 @@
-package acl
-
-import (
-	"strconv"
-
-	"github.com/nspcc-dev/neofs-api-go/object"
-	"github.com/nspcc-dev/neofs-api-go/service"
-)
-
-type objectHeaderSource struct {
-	obj *object.Object
-}
-
-type typedHeader struct {
-	n string
-	v string
-	t HeaderType
-}
-
-type extendedHeadersWrapper struct {
-	hdrSrc service.ExtendedHeadersSource
-}
-
-type typedExtendedHeader struct {
-	hdr service.ExtendedHeader
-}
-
-const (
-	_ HeaderType = iota
-
-	// HdrTypeRequest is a HeaderType for request header.
-	HdrTypeRequest
-
-	// HdrTypeObjSys is a HeaderType for system headers of object.
-	HdrTypeObjSys
-
-	// HdrTypeObjUsr is a HeaderType for user headers of object.
-	HdrTypeObjUsr
-)
-
-const (
-	// HdrObjSysNameID is a name of ID field in system header of object.
-	HdrObjSysNameID = "ID"
-
-	// HdrObjSysNameCID is a name of CID field in system header of object.
-	HdrObjSysNameCID = "CID"
-
-	// HdrObjSysNameOwnerID is a name of OwnerID field in system header of object.
-	HdrObjSysNameOwnerID = "OWNER_ID"
-
-	// HdrObjSysNameVersion is a name of Version field in system header of object.
-	HdrObjSysNameVersion = "VERSION"
-
-	// HdrObjSysNamePayloadLength is a name of PayloadLength field in system header of object.
-	HdrObjSysNamePayloadLength = "PAYLOAD_LENGTH"
-
-	// HdrObjSysNameCreatedUnix is a name of CreatedAt.UnitTime field in system header of object.
-	HdrObjSysNameCreatedUnix = "CREATED_UNIX"
-
-	// HdrObjSysNameCreatedEpoch is a name of CreatedAt.Epoch field in system header of object.
-	HdrObjSysNameCreatedEpoch = "CREATED_EPOCH"
-
-	// HdrObjSysLinkPrev is a name of previous link header in extended headers of object.
-	HdrObjSysLinkPrev = "LINK_PREV"
-
-	// HdrObjSysLinkNext is a name of next link header in extended headers of object.
-	HdrObjSysLinkNext = "LINK_NEXT"
-
-	// HdrObjSysLinkChild is a name of child link header in extended headers of object.
-	HdrObjSysLinkChild = "LINK_CHILD"
-
-	// HdrObjSysLinkPar is a name of parent link header in extended headers of object.
-	HdrObjSysLinkPar = "LINK_PAR"
-
-	// HdrObjSysLinkSG is a name of storage group link header in extended headers of object.
-	HdrObjSysLinkSG = "LINK_SG"
-)
-
-func newTypedHeader(name, value string, typ HeaderType) TypedHeader {
-	return &typedHeader{
-		n: name,
-		v: value,
-		t: typ,
-	}
-}
-
-// Name is a name field getter.
-func (s typedHeader) Name() string {
-	return s.n
-}
-
-// Value is a value field getter.
-func (s typedHeader) Value() string {
-	return s.v
-}
-
-// HeaderType is a type field getter.
-func (s typedHeader) HeaderType() HeaderType {
-	return s.t
-}
-
-// TypedHeaderSourceFromObject wraps passed object and returns TypedHeaderSource interface.
-func TypedHeaderSourceFromObject(obj *object.Object) TypedHeaderSource {
-	return &objectHeaderSource{
-		obj: obj,
-	}
-}
-
-// HeaderOfType gathers object headers of passed type and returns Header list.
-//
-// If value of some header can not be calculated (e.g. nil extended header), it does not appear in list.
-//
-// Always returns true.
-func (s objectHeaderSource) HeadersOfType(typ HeaderType) ([]Header, bool) {
-	if s.obj == nil {
-		return nil, true
-	}
-
-	var res []Header
-
-	switch typ {
-	case HdrTypeObjUsr:
-		objHeaders := s.obj.GetHeaders()
-
-		res = make([]Header, 0, len(objHeaders)) // 7 system header fields
-
-		for _, extHdr := range objHeaders {
-			if h := newTypedObjectExtendedHeader(extHdr); h != nil {
-				res = append(res, h)
-			}
-		}
-	case HdrTypeObjSys:
-		res = make([]Header, 0, 7)
-
-		sysHdr := s.obj.GetSystemHeader()
-
-		// ID
-		res = append(res, newTypedHeader(
-			HdrObjSysNameID,
-			sysHdr.ID.String(),
-			HdrTypeObjSys),
-		)
-
-		// CID
-		res = append(res, newTypedHeader(
-			HdrObjSysNameCID,
-			sysHdr.CID.String(),
-			HdrTypeObjSys),
-		)
-
-		// OwnerID
-		res = append(res, newTypedHeader(
-			HdrObjSysNameOwnerID,
-			sysHdr.OwnerID.String(),
-			HdrTypeObjSys),
-		)
-
-		// Version
-		res = append(res, newTypedHeader(
-			HdrObjSysNameVersion,
-			strconv.FormatUint(sysHdr.GetVersion(), 10),
-			HdrTypeObjSys),
-		)
-
-		// PayloadLength
-		res = append(res, newTypedHeader(
-			HdrObjSysNamePayloadLength,
-			strconv.FormatUint(sysHdr.GetPayloadLength(), 10),
-			HdrTypeObjSys),
-		)
-
-		created := sysHdr.GetCreatedAt()
-
-		// CreatedAt.UnitTime
-		res = append(res, newTypedHeader(
-			HdrObjSysNameCreatedUnix,
-			strconv.FormatUint(uint64(created.GetUnixTime()), 10),
-			HdrTypeObjSys),
-		)
-
-		// CreatedAt.Epoch
-		res = append(res, newTypedHeader(
-			HdrObjSysNameCreatedEpoch,
-			strconv.FormatUint(created.GetEpoch(), 10),
-			HdrTypeObjSys),
-		)
-	}
-
-	return res, true
-}
-
-func newTypedObjectExtendedHeader(h object.Header) TypedHeader {
-	val := h.GetValue()
-	if val == nil {
-		return nil
-	}
-
-	res := new(typedHeader)
-	res.t = HdrTypeObjSys
-
-	switch hdr := val.(type) {
-	case *object.Header_UserHeader:
-		if hdr.UserHeader == nil {
-			return nil
-		}
-
-		res.t = HdrTypeObjUsr
-		res.n = hdr.UserHeader.GetKey()
-		res.v = hdr.UserHeader.GetValue()
-	case *object.Header_Link:
-		if hdr.Link == nil {
-			return nil
-		}
-
-		switch hdr.Link.GetType() {
-		case object.Link_Previous:
-			res.n = HdrObjSysLinkPrev
-		case object.Link_Next:
-			res.n = HdrObjSysLinkNext
-		case object.Link_Child:
-			res.n = HdrObjSysLinkChild
-		case object.Link_Parent:
-			res.n = HdrObjSysLinkPar
-		case object.Link_StorageGroup:
-			res.n = HdrObjSysLinkSG
-		default:
-			return nil
-		}
-
-		res.v = hdr.Link.ID.String()
-	default:
-		return nil
-	}
-
-	return res
-}
-
-// TypedHeaderSourceFromExtendedHeaders wraps passed ExtendedHeadersSource and returns TypedHeaderSource interface.
-func TypedHeaderSourceFromExtendedHeaders(hdrSrc service.ExtendedHeadersSource) TypedHeaderSource {
-	return &extendedHeadersWrapper{
-		hdrSrc: hdrSrc,
-	}
-}
-
-// Name returns the result of Key method.
-func (s typedExtendedHeader) Name() string {
-	return s.hdr.Key()
-}
-
-// Value returns the result of Value method.
-func (s typedExtendedHeader) Value() string {
-	return s.hdr.Value()
-}
-
-// HeaderType always returns HdrTypeRequest.
-func (s typedExtendedHeader) HeaderType() HeaderType {
-	return HdrTypeRequest
-}
-
-// TypedHeaders gathers extended request headers and returns TypedHeader list.
-//
-// Nil headers are ignored.
-//
-// Always returns true.
-func (s extendedHeadersWrapper) HeadersOfType(typ HeaderType) ([]Header, bool) {
-	if s.hdrSrc == nil {
-		return nil, true
-	}
-
-	var res []Header
-
-	switch typ {
-	case HdrTypeRequest:
-		hs := s.hdrSrc.ExtendedHeaders()
-
-		res = make([]Header, 0, len(hs))
-
-		for i := range hs {
-			if hs[i] == nil {
-				continue
-			}
-
-			res = append(res, &typedExtendedHeader{
-				hdr: hs[i],
-			})
-		}
-	}
-
-	return res, true
-}
diff --git a/acl/match.go b/acl/match.go
deleted file mode 100644
index bddee89..0000000
--- a/acl/match.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package acl
-
-const (
-	_ MatchType = iota
-	StringEqual
-	StringNotEqual
-)
-
-// Maps MatchType to corresponding function.
-// 1st argument of function - header value, 2nd - header filter.
-var mMatchFns = map[MatchType]func(Header, Header) bool{
-	StringEqual: stringEqual,
-
-	StringNotEqual: stringNotEqual,
-}
-
-const (
-	mResUndefined = iota
-	mResMatch
-	mResMismatch
-)
-
-func stringEqual(header, filter Header) bool {
-	return header.Value() == filter.Value()
-}
-
-func stringNotEqual(header, filter Header) bool {
-	return header.Value() != filter.Value()
-}
diff --git a/acl/types.go b/acl/types.go
index 0587b9b..6a418bc 100644
--- a/acl/types.go
+++ b/acl/types.go
@@ -1,5 +1,121 @@
 package acl
 
+import (
+	"github.com/nspcc-dev/neofs-api-go/object"
+	"github.com/nspcc-dev/neofs-api-go/service"
+)
+
+const (
+	_ MatchType = iota
+	stringEqual
+	stringNotEqual
+)
+
+const (
+	// ActionUndefined is ExtendedACLAction used to mark value as undefined.
+	// Most of the tools consider ActionUndefined as incalculable.
+	// Using ActionUndefined in ExtendedACLRecord is unsafe.
+	ActionUndefined ExtendedACLAction = iota
+
+	// ActionAllow is ExtendedACLAction used to mark an applicability of ACL rule.
+	ActionAllow
+
+	// ActionDeny is ExtendedACLAction used to mark an inapplicability of ACL rule.
+	ActionDeny
+)
+
+const (
+	_ HeaderType = iota
+
+	// HdrTypeRequest is a HeaderType for request header.
+	HdrTypeRequest
+
+	// HdrTypeObjSys is a HeaderType for system headers of object.
+	HdrTypeObjSys
+
+	// HdrTypeObjUsr is a HeaderType for user headers of object.
+	HdrTypeObjUsr
+)
+
+const (
+	// HdrObjSysNameID is a name of ID field in system header of object.
+	HdrObjSysNameID = "ID"
+
+	// HdrObjSysNameCID is a name of CID field in system header of object.
+	HdrObjSysNameCID = "CID"
+
+	// HdrObjSysNameOwnerID is a name of OwnerID field in system header of object.
+	HdrObjSysNameOwnerID = "OWNER_ID"
+
+	// HdrObjSysNameVersion is a name of Version field in system header of object.
+	HdrObjSysNameVersion = "VERSION"
+
+	// HdrObjSysNamePayloadLength is a name of PayloadLength field in system header of object.
+	HdrObjSysNamePayloadLength = "PAYLOAD_LENGTH"
+
+	// HdrObjSysNameCreatedUnix is a name of CreatedAt.UnitTime field in system header of object.
+	HdrObjSysNameCreatedUnix = "CREATED_UNIX"
+
+	// HdrObjSysNameCreatedEpoch is a name of CreatedAt.Epoch field in system header of object.
+	HdrObjSysNameCreatedEpoch = "CREATED_EPOCH"
+
+	// HdrObjSysLinkPrev is a name of previous link header in extended headers of object.
+	HdrObjSysLinkPrev = "LINK_PREV"
+
+	// HdrObjSysLinkNext is a name of next link header in extended headers of object.
+	HdrObjSysLinkNext = "LINK_NEXT"
+
+	// HdrObjSysLinkChild is a name of child link header in extended headers of object.
+	HdrObjSysLinkChild = "LINK_CHILD"
+
+	// HdrObjSysLinkPar is a name of parent link header in extended headers of object.
+	HdrObjSysLinkPar = "LINK_PAR"
+
+	// HdrObjSysLinkSG is a name of storage group link header in extended headers of object.
+	HdrObjSysLinkSG = "LINK_SG"
+)
+
+type objectHeaderSource struct {
+	obj *object.Object
+}
+
+type typedHeader struct {
+	n string
+	v string
+	t HeaderType
+}
+
+type extendedHeadersWrapper struct {
+	hdrSrc service.ExtendedHeadersSource
+}
+
+type typedExtendedHeader struct {
+	hdr service.ExtendedHeader
+}
+
+func newTypedHeader(name, value string, typ HeaderType) TypedHeader {
+	return &typedHeader{
+		n: name,
+		v: value,
+		t: typ,
+	}
+}
+
+// Name is a name field getter.
+func (s typedHeader) Name() string {
+	return s.n
+}
+
+// Value is a value field getter.
+func (s typedHeader) Value() string {
+	return s.v
+}
+
+// HeaderType is a type field getter.
+func (s typedHeader) HeaderType() HeaderType {
+	return s.t
+}
+
 // SetMatchType is MatchType field setter.
 func (m *EACLRecord_FilterInfo) SetMatchType(v EACLRecord_FilterInfo_MatchType) {
 	m.MatchType = v
diff --git a/acl/wrappers.go b/acl/wrappers.go
index 30c2ee3..94e420a 100644
--- a/acl/wrappers.go
+++ b/acl/wrappers.go
@@ -83,9 +83,9 @@ func (s EACLFilterWrapper) MatchType() (res MatchType) {
 	if s.filter != nil {
 		switch s.filter.GetMatchType() {
 		case EACLRecord_FilterInfo_StringEqual:
-			res = StringEqual
+			res = stringEqual
 		case EACLRecord_FilterInfo_StringNotEqual:
-			res = StringNotEqual
+			res = stringNotEqual
 		}
 	}
 
@@ -102,9 +102,9 @@ func (s EACLFilterWrapper) MatchType() (res MatchType) {
 func (s EACLFilterWrapper) SetMatchType(v MatchType) {
 	if s.filter != nil {
 		switch v {
-		case StringEqual:
+		case stringEqual:
 			s.filter.SetMatchType(EACLRecord_FilterInfo_StringEqual)
-		case StringNotEqual:
+		case stringNotEqual:
 			s.filter.SetMatchType(EACLRecord_FilterInfo_StringNotEqual)
 		default:
 			s.filter.SetMatchType(EACLRecord_FilterInfo_MatchUnknown)
diff --git a/acl/wrappers_test.go b/acl/wrappers_test.go
index b7dbbe0..a55db8c 100644
--- a/acl/wrappers_test.go
+++ b/acl/wrappers_test.go
@@ -9,7 +9,7 @@ import (
 func TestEACLFilterWrapper(t *testing.T) {
 	s := WrapFilterInfo(nil)
 
-	mt := StringEqual
+	mt := stringEqual
 	s.SetMatchType(mt)
 	require.Equal(t, mt, s.MatchType())
 

From f82651720726fe9fdc27f7f4fffa5b56b793e4d9 Mon Sep 17 00:00:00 2001
From: Pavel Korotkov <pkorotkov@gmail.com>
Date: Tue, 7 Jul 2020 22:16:56 +0300
Subject: [PATCH 6/9] acl: delete unused types

---
 acl/extended.go | 27 ---------------------------
 acl/types.go    | 46 ----------------------------------------------
 2 files changed, 73 deletions(-)

diff --git a/acl/extended.go b/acl/extended.go
index 61ccbcf..df8402a 100644
--- a/acl/extended.go
+++ b/acl/extended.go
@@ -1,11 +1,5 @@
 package acl
 
-import (
-	"context"
-
-	"github.com/nspcc-dev/neofs-api-go/refs"
-)
-
 // OperationType is an enumeration of operation types for extended ACL.
 type OperationType uint32
 
@@ -35,13 +29,6 @@ type TypedHeader interface {
 	HeaderType() HeaderType
 }
 
-// TypedHeaderSource is a various types of header set interface.
-type TypedHeaderSource interface {
-	// Must return list of Header of particular type.
-	// Must return false if there is no ability to compose header list.
-	HeadersOfType(HeaderType) ([]Header, bool)
-}
-
 // HeaderFilter is an interface of grouped information about filtered header.
 type HeaderFilter interface {
 	// Must return match type of filter.
@@ -80,20 +67,6 @@ type ExtendedACLTable interface {
 	Records() []ExtendedACLRecord
 }
 
-// ExtendedACLSource is an interface of storage of extended ACL tables with read access.
-type ExtendedACLSource interface {
-	// Must return extended ACL table by container ID key.
-	GetExtendedACLTable(context.Context, refs.CID) (ExtendedACLTable, error)
-}
-
-// ExtendedACLStore is an interface of storage of extended ACL tables.
-type ExtendedACLStore interface {
-	ExtendedACLSource
-
-	// Must store extended ACL table for container ID key.
-	PutExtendedACLTable(context.Context, refs.CID, ExtendedACLTable) error
-}
-
 const (
 	_ OperationType = iota
 
diff --git a/acl/types.go b/acl/types.go
index 6a418bc..c9bbfd3 100644
--- a/acl/types.go
+++ b/acl/types.go
@@ -1,10 +1,5 @@
 package acl
 
-import (
-	"github.com/nspcc-dev/neofs-api-go/object"
-	"github.com/nspcc-dev/neofs-api-go/service"
-)
-
 const (
 	_ MatchType = iota
 	stringEqual
@@ -75,47 +70,6 @@ const (
 	HdrObjSysLinkSG = "LINK_SG"
 )
 
-type objectHeaderSource struct {
-	obj *object.Object
-}
-
-type typedHeader struct {
-	n string
-	v string
-	t HeaderType
-}
-
-type extendedHeadersWrapper struct {
-	hdrSrc service.ExtendedHeadersSource
-}
-
-type typedExtendedHeader struct {
-	hdr service.ExtendedHeader
-}
-
-func newTypedHeader(name, value string, typ HeaderType) TypedHeader {
-	return &typedHeader{
-		n: name,
-		v: value,
-		t: typ,
-	}
-}
-
-// Name is a name field getter.
-func (s typedHeader) Name() string {
-	return s.n
-}
-
-// Value is a value field getter.
-func (s typedHeader) Value() string {
-	return s.v
-}
-
-// HeaderType is a type field getter.
-func (s typedHeader) HeaderType() HeaderType {
-	return s.t
-}
-
 // SetMatchType is MatchType field setter.
 func (m *EACLRecord_FilterInfo) SetMatchType(v EACLRecord_FilterInfo_MatchType) {
 	m.MatchType = v

From 2fba8cb7b33f8cdc1396a143aa6684e69b230eba Mon Sep 17 00:00:00 2001
From: Pavel Korotkov <pkorotkov@gmail.com>
Date: Tue, 7 Jul 2020 23:03:53 +0300
Subject: [PATCH 7/9] acl: make MatchType's constants public back

---
 acl/types.go         | 8 ++++++--
 acl/wrappers.go      | 8 ++++----
 acl/wrappers_test.go | 2 +-
 3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/acl/types.go b/acl/types.go
index c9bbfd3..c80c9cd 100644
--- a/acl/types.go
+++ b/acl/types.go
@@ -2,8 +2,12 @@ package acl
 
 const (
 	_ MatchType = iota
-	stringEqual
-	stringNotEqual
+
+	// StringEqual is a MatchType of string equality.
+	StringEqual
+
+	// StringNotEqual is a MatchType of string inequality.
+	StringNotEqual
 )
 
 const (
diff --git a/acl/wrappers.go b/acl/wrappers.go
index 94e420a..30c2ee3 100644
--- a/acl/wrappers.go
+++ b/acl/wrappers.go
@@ -83,9 +83,9 @@ func (s EACLFilterWrapper) MatchType() (res MatchType) {
 	if s.filter != nil {
 		switch s.filter.GetMatchType() {
 		case EACLRecord_FilterInfo_StringEqual:
-			res = stringEqual
+			res = StringEqual
 		case EACLRecord_FilterInfo_StringNotEqual:
-			res = stringNotEqual
+			res = StringNotEqual
 		}
 	}
 
@@ -102,9 +102,9 @@ func (s EACLFilterWrapper) MatchType() (res MatchType) {
 func (s EACLFilterWrapper) SetMatchType(v MatchType) {
 	if s.filter != nil {
 		switch v {
-		case stringEqual:
+		case StringEqual:
 			s.filter.SetMatchType(EACLRecord_FilterInfo_StringEqual)
-		case stringNotEqual:
+		case StringNotEqual:
 			s.filter.SetMatchType(EACLRecord_FilterInfo_StringNotEqual)
 		default:
 			s.filter.SetMatchType(EACLRecord_FilterInfo_MatchUnknown)
diff --git a/acl/wrappers_test.go b/acl/wrappers_test.go
index a55db8c..b7dbbe0 100644
--- a/acl/wrappers_test.go
+++ b/acl/wrappers_test.go
@@ -9,7 +9,7 @@ import (
 func TestEACLFilterWrapper(t *testing.T) {
 	s := WrapFilterInfo(nil)
 
-	mt := stringEqual
+	mt := StringEqual
 	s.SetMatchType(mt)
 	require.Equal(t, mt, s.MatchType())
 

From 504804f80604ad8c2222300dbd5266a9b76308d6 Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Wed, 8 Jul 2020 10:50:58 +0300
Subject: [PATCH 8/9] Update to neofs-api v1.2.0

---
 Makefile        |   2 +-
 acl/types.proto |   2 +-
 docs/acl.md     | 116 +++++++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 117 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 159c7e3..600586e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-PROTO_VERSION=v1.1.0
+PROTO_VERSION=v1.2.0
 PROTO_URL=https://github.com/nspcc-dev/neofs-api/archive/$(PROTO_VERSION).tar.gz
 
 B=\033[0;1m
diff --git a/acl/types.proto b/acl/types.proto
index 6934b36..7f3efc9 100644
--- a/acl/types.proto
+++ b/acl/types.proto
@@ -103,4 +103,4 @@ message EACLRecord {
 message EACLTable {
     // Records carries list of extended ACL rule records.
     repeated EACLRecord Records = 1 [json_name="Records"];
-}
\ No newline at end of file
+}
diff --git a/docs/acl.md b/docs/acl.md
index 38f328b..f63758b 100644
--- a/docs/acl.md
+++ b/docs/acl.md
@@ -5,7 +5,12 @@
 
 - [acl/types.proto](#acl/types.proto)
 
-
+  - Messages
+    - [EACLRecord](#acl.EACLRecord)
+    - [EACLRecord.FilterInfo](#acl.EACLRecord.FilterInfo)
+    - [EACLRecord.TargetInfo](#acl.EACLRecord.TargetInfo)
+    - [EACLTable](#acl.EACLTable)
+    
 
 - [Scalar Value Types](#scalar-value-types)
 
@@ -19,9 +24,118 @@
 
  <!-- end services -->
 
+
+<a name="acl.EACLRecord"></a>
+
+### Message EACLRecord
+EACLRecord groups information about extended ACL rule.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| operation | [EACLRecord.Operation](#acl.EACLRecord.Operation) |  | Operation carries type of operation. |
+| action | [EACLRecord.Action](#acl.EACLRecord.Action) |  | Action carries ACL target action. |
+| Filters | [EACLRecord.FilterInfo](#acl.EACLRecord.FilterInfo) | repeated | Filters carries set of filters. |
+| Targets | [EACLRecord.TargetInfo](#acl.EACLRecord.TargetInfo) | repeated | Targets carries information about extended ACL target list. |
+
+
+<a name="acl.EACLRecord.FilterInfo"></a>
+
+### Message EACLRecord.FilterInfo
+FilterInfo groups information about filter.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| header | [EACLRecord.FilterInfo.Header](#acl.EACLRecord.FilterInfo.Header) |  | Header carries type of header. |
+| matchType | [EACLRecord.FilterInfo.MatchType](#acl.EACLRecord.FilterInfo.MatchType) |  | MatchType carries type of match. |
+| HeaderName | [string](#string) |  | HeaderName carries name of filtering header. |
+| HeaderVal | [string](#string) |  | HeaderVal carries value of filtering header. |
+
+
+<a name="acl.EACLRecord.TargetInfo"></a>
+
+### Message EACLRecord.TargetInfo
+TargetInfo groups information about extended ACL target.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| Target | [Target](#acl.Target) |  | Target carries target of ACL rule. |
+| KeyList | [bytes](#bytes) | repeated | KeyList carries public keys of ACL target. |
+
+
+<a name="acl.EACLTable"></a>
+
+### Message EACLTable
+EACLRecord carries the information about extended ACL rules.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| Records | [EACLRecord](#acl.EACLRecord) | repeated | Records carries list of extended ACL rule records. |
+
  <!-- end messages -->
 
 
+<a name="acl.EACLRecord.Action"></a>
+
+### EACLRecord.Action
+Action is an enumeration of EACL actions.
+
+| Name | Number | Description |
+| ---- | ------ | ----------- |
+| ActionUnknown | 0 |  |
+| Allow | 1 |  |
+| Deny | 2 |  |
+
+
+
+<a name="acl.EACLRecord.FilterInfo.Header"></a>
+
+### EACLRecord.FilterInfo.Header
+Header is an enumeration of filtering header types.
+
+| Name | Number | Description |
+| ---- | ------ | ----------- |
+| HeaderUnknown | 0 |  |
+| Request | 1 |  |
+| ObjectSystem | 2 |  |
+| ObjectUser | 3 |  |
+
+
+
+<a name="acl.EACLRecord.FilterInfo.MatchType"></a>
+
+### EACLRecord.FilterInfo.MatchType
+MatchType is an enumeration of match types.
+
+| Name | Number | Description |
+| ---- | ------ | ----------- |
+| MatchUnknown | 0 |  |
+| StringEqual | 1 |  |
+| StringNotEqual | 2 |  |
+
+
+
+<a name="acl.EACLRecord.Operation"></a>
+
+### EACLRecord.Operation
+Operation is an enumeration of operation types.
+
+| Name | Number | Description |
+| ---- | ------ | ----------- |
+| OPERATION_UNKNOWN | 0 |  |
+| GET | 1 |  |
+| HEAD | 2 |  |
+| PUT | 3 |  |
+| DELETE | 4 |  |
+| SEARCH | 5 |  |
+| GETRANGE | 6 |  |
+| GETRANGEHASH | 7 |  |
+
+
+
 <a name="acl.Target"></a>
 
 ### Target

From 2bf5a0c30b228e68e567bbb1f12716e77b0eb46a Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Wed, 8 Jul 2020 11:09:29 +0300
Subject: [PATCH 9/9] Update changelog and readme for v1.2.0

---
 CHANGELOG.md | 18 ++++++++++++++++++
 README.md    |  6 +++++-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e771c19..898dcce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,23 @@
 # Changelog
 This is the changelog for NeoFS-API-Go
 
+## [1.2.0] - 2020-07-08
+
+### Added
+
+- Extended ACL types.
+- Getters and setters of ```EACLTable``` and its internal messages.
+- Wrappers over ```EACLTable``` and its internal messages.
+- Getters, setters and marshaling methods of wrappers.
+
+### Changed
+
+- Mechanism for signing requests on the principle of Matryoshka.
+
+### Updated
+
+- NeoFS API v1.1.0 => 1.2.0
+
 ## [1.1.0] - 2020-06-18
 
 ### Added
@@ -357,3 +374,4 @@ Initial public release
 [0.7.6]: https://github.com/nspcc-dev/neofs-api-go/compare/v0.7.5...v0.7.6
 [1.0.0]: https://github.com/nspcc-dev/neofs-api-go/compare/v0.7.6...v1.0.0
 [1.1.0]: https://github.com/nspcc-dev/neofs-api-go/compare/v1.0.0...v1.1.0
+[1.2.0]: https://github.com/nspcc-dev/neofs-api-go/compare/v1.1.0...v1.2.0
diff --git a/README.md b/README.md
index d44e057..4c768b2 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,11 @@ can be used for integration with NeoFS.
 
 [neofs-api v1.1.0]: https://github.com/nspcc-dev/neofs-api/releases/tag/v1.1.0
 [neofs-api-go v1.1.0]: https://github.com/nspcc-dev/neofs-api-go/releases/tag/v1.1.0
-[neofs-api-go v1.1.0] supports [neofs-api v1.1.0]
+* [neofs-api-go v1.1.0] supports [neofs-api v1.1.0]
+
+[neofs-api v1.2.0]: https://github.com/nspcc-dev/neofs-api/releases/tag/v1.2.0
+[neofs-api-go v1.2.0]: https://github.com/nspcc-dev/neofs-api-go/releases/tag/v1.2.0
+* [neofs-api-go v1.2.0] supports [neofs-api v1.2.0]
 
 ## Description