Merge pull request #60 from roman-khimov/drop-cdn-sdk

Drop old sdk

api/auth/center.go

@@ -12,12 +12,12 @@ import (
 
 	"github.com/aws/aws-sdk-go/aws/credentials"
 	v4 "github.com/aws/aws-sdk-go/aws/signer/v4"
-	sdk "github.com/nspcc-dev/cdn-sdk"
-	"github.com/nspcc-dev/cdn-sdk/creds/bearer"
-	"github.com/nspcc-dev/cdn-sdk/creds/hcs"
-	"github.com/nspcc-dev/cdn-sdk/creds/s3"
 	"github.com/nspcc-dev/neofs-api-go/pkg/object"
 	"github.com/nspcc-dev/neofs-api-go/pkg/token"
+	sdk "github.com/nspcc-dev/neofs-http-gw/neofs"
+	"github.com/nspcc-dev/neofs-s3-gw/authmate"
+	"github.com/nspcc-dev/neofs-s3-gw/creds/bearer"
+	"github.com/nspcc-dev/neofs-s3-gw/creds/hcs"
 	"go.uber.org/zap"
 )
 
@@ -36,7 +36,7 @@ type (
 
 	// Params stores node connection parameters.
 	Params struct {
-		Client     sdk.Client
+		Client     sdk.ClientPlant
 		Logger     *zap.Logger
 		Credential hcs.Credentials
 	}
@@ -55,7 +55,7 @@ func (p prs) Seek(_ int64, _ int) (int64, error) {
 var _ io.ReadSeeker = prs(0)
 
 // New creates an instance of AuthCenter.
-func New(obj sdk.ObjectClient, key hcs.PrivateKey) Center {
+func New(obj sdk.ClientPlant, key hcs.PrivateKey) Center {
 	return &center{
 		cli: bearer.New(obj, key),
 		reg: &regexpSubmatcher{re: authorizationFieldRegexp},
@@ -100,7 +100,7 @@ func (c *center) Authenticate(r *http.Request) (*token.BearerToken, error) {
 		return nil, err
 	}
 
-	secret, err := s3.SecretAccessKey(tkn)
+	secret, err := authmate.BearerToAccessKey(tkn)
 	if err != nil {
 		return nil, err
 	}

api/layer/container.go

@@ -42,7 +42,15 @@ func (n *layer) containerInfo(ctx context.Context, cid *container.ID) (*BucketIn
 		}
 	)
 
-	if res, err = n.cli.Container().Get(ctx, cid); err != nil {
+	conn, _, err := n.cli.ConnectionArtifacts()
+	if err != nil {
+		n.log.Error("failed to get connection from the pool",
+			zap.String("request_id", rid),
+			zap.Error(err))
+		return nil, err
+	}
+	res, err = conn.GetContainer(ctx, cid)
+	if err != nil {
 		n.log.Error("could not fetch container",
 			zap.Stringer("cid", cid),
 			zap.String("request_id", rid),
@@ -84,7 +92,15 @@ func (n *layer) containerList(ctx context.Context) ([]*BucketInfo, error) {
 		rid = api.GetRequestID(ctx)
 	)
 
-	if res, err = n.cli.Container().List(ctx, own); err != nil {
+	conn, _, err := n.cli.ConnectionArtifacts()
+	if err != nil {
+		n.log.Error("failed to get connection from the pool",
+			zap.String("request_id", rid),
+			zap.Error(err))
+		return nil, err
+	}
+	res, err = conn.ListContainers(ctx, own)
+	if err != nil {
 		n.log.Error("could not fetch container",
 			zap.String("request_id", rid),
 			zap.Error(err))

api/layer/layer.go

@@ -8,13 +8,15 @@ import (
 	"net/url"
 	"time"
 
-	sdk "github.com/nspcc-dev/cdn-sdk"
+	"github.com/nspcc-dev/neofs-api-go/pkg/client"
-	"github.com/nspcc-dev/cdn-sdk/creds/neofs"
-	"github.com/nspcc-dev/cdn-sdk/pool"
 	"github.com/nspcc-dev/neofs-api-go/pkg/container"
 	"github.com/nspcc-dev/neofs-api-go/pkg/object"
 	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
+	"github.com/nspcc-dev/neofs-api-go/pkg/token"
+	"github.com/nspcc-dev/neofs-http-gw/connections"
+	sdk "github.com/nspcc-dev/neofs-http-gw/neofs"
 	"github.com/nspcc-dev/neofs-s3-gw/api"
+	"github.com/nspcc-dev/neofs-s3-gw/creds/neofs"
 	"go.uber.org/zap"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
@@ -22,13 +24,13 @@ import (
 
 type (
 	layer struct {
-		cli sdk.Client
+		cli sdk.ClientPlant
 		log *zap.Logger
 	}
 
 	// Params stores basic API parameters.
 	Params struct {
-		Pool       pool.Client
+		Pool       connections.Pool
 		Logger     *zap.Logger
 		Timeout    time.Duration
 		Credential neofs.Credentials
@@ -96,7 +98,7 @@ var (
 
 // NewLayer creates instance of layer. It checks credentials
 // and establishes gRPC connection with node.
-func NewLayer(log *zap.Logger, cli sdk.Client) Client {
+func NewLayer(log *zap.Logger, cli sdk.ClientPlant) Client {
 	return &layer{
 		cli: cli,
 		log: log,
@@ -105,16 +107,21 @@ func NewLayer(log *zap.Logger, cli sdk.Client) Client {
 
 // Owner returns owner id from BearerToken (context) or from client owner.
 func (n *layer) Owner(ctx context.Context) *owner.ID {
-	if tkn, err := sdk.BearerToken(ctx); err != nil && tkn != nil {
+	if tkn, ok := ctx.Value(api.BearerTokenKey).(*token.BearerToken); ok && tkn != nil {
 		return tkn.Issuer()
 	}
 
-	return n.cli.Owner()
+	return n.cli.OwnerID()
 }
 
 // Get NeoFS Object by refs.Address (should be used by auth.Center).
 func (n *layer) Get(ctx context.Context, address *object.Address) (*object.Object, error) {
-	return n.cli.Object().Get(ctx, address)
+	conn, tok, err := n.cli.ConnectionArtifacts()
+	if err != nil {
+		return nil, err
+	}
+	ops := new(client.GetObjectParams).WithAddress(address)
+	return conn.GetObject(ctx, ops, client.WithSession(tok))
 }
 
 // GetBucketInfo returns bucket info by name.

api/layer/object.go

@@ -8,7 +8,7 @@ import (
 	"strconv"
 	"time"
 
-	sdk "github.com/nspcc-dev/cdn-sdk"
+	"github.com/nspcc-dev/neofs-api-go/pkg/client"
 	"github.com/nspcc-dev/neofs-api-go/pkg/container"
 	"github.com/nspcc-dev/neofs-api-go/pkg/object"
 	"github.com/nspcc-dev/neofs-s3-gw/api"
@@ -33,16 +33,20 @@ type (
 
 // objectSearch returns all available objects by search params.
 func (n *layer) objectSearch(ctx context.Context, p *findParams) ([]*object.ID, error) {
-	opts := []sdk.ObjectSearchOption{
+	var opts object.SearchFilters
-		sdk.SearchRootObjects(),
+
-	}
+	opts.AddRootFilter()
 
 	if filename, err := url.QueryUnescape(p.val); err != nil {
 		return nil, err
 	} else if filename != "" {
-		opts = append(opts, sdk.SearchByFilename(filename))
+		opts.AddFilter(object.AttributeFileName, filename, object.MatchStringEqual)
 	}
-	return n.cli.Object().Search(ctx, p.cid, opts...)
+	conn, _, err := n.cli.ConnectionArtifacts()
+	if err != nil {
+		return nil, err
+	}
+	return conn.SearchObject(ctx, new(client.SearchObjectParams).WithContainerID(p.cid).WithSearchFilters(opts))
 }
 
 // objectFindID returns object id (uuid) based on it's nice name in s3. If
@@ -61,14 +65,24 @@ func (n *layer) objectFindID(ctx context.Context, p *findParams) (*object.ID, er
 
 // objectHead returns all object's headers.
 func (n *layer) objectHead(ctx context.Context, address *object.Address) (*object.Object, error) {
-	return n.cli.Object().Head(ctx, address, sdk.WithFullHeaders())
+	conn, _, err := n.cli.ConnectionArtifacts()
+	if err != nil {
+		return nil, err
+	}
+	ops := new(client.ObjectHeaderParams).WithAddress(address).WithAllFields()
+	return conn.GetObjectHeader(ctx, ops)
 }
 
 // objectGet and write it into provided io.Reader.
 func (n *layer) objectGet(ctx context.Context, p *getParams) (*object.Object, error) {
+	conn, tok, err := n.cli.ConnectionArtifacts()
+	if err != nil {
+		return nil, err
+	}
 	// prepare length/offset writer
 	w := newWriter(p.Writer, p.offset, p.length)
-	return n.cli.Object().Get(ctx, p.address, sdk.WithGetWriter(w))
+	ops := new(client.GetObjectParams).WithAddress(p.address).WithPayloadWriter(w)
+	return conn.GetObject(ctx, ops, client.WithSession(tok))
 }
 
 // objectPut into NeoFS, took payload from io.Reader.
@@ -78,8 +92,6 @@ func (n *layer) objectPut(ctx context.Context, p *PutObjectParams) (*ObjectInfo,
 		obj string
 		bkt *BucketInfo
 		own = n.Owner(ctx)
-
-		address *object.Address
 	)
 
 	if obj, err = url.QueryUnescape(p.Object); err != nil {
@@ -123,12 +135,23 @@ func (n *layer) objectPut(ctx context.Context, p *PutObjectParams) (*ObjectInfo,
 	raw.SetAttributes(attributes...)
 
 	r := newDetector(p.Reader)
-	if address, err = n.cli.Object().Put(ctx, raw.Object(), sdk.WithPutReader(r)); err != nil {
+	conn, tok, err := n.cli.ConnectionArtifacts()
+	if err != nil {
+		return nil, err
+	}
+
+	ops := new(client.PutObjectParams).WithObject(raw.Object()).WithPayloadReader(r)
+	oid, err := conn.PutObject(
+		ctx,
+		ops,
+		client.WithSession(tok),
+	)
+	if err != nil {
 		return nil, err
 	}
 
 	return &ObjectInfo{
-		id: address.ObjectID(),
+		id: oid,
 
 		Owner:       own,
 		Bucket:      p.Bucket,
@@ -142,5 +165,11 @@ func (n *layer) objectPut(ctx context.Context, p *PutObjectParams) (*ObjectInfo,
 
 // objectDelete puts tombstone object into neofs.
 func (n *layer) objectDelete(ctx context.Context, address *object.Address) error {
-	return n.cli.Object().Delete(ctx, address)
+	conn, _, err := n.cli.ConnectionArtifacts()
+	if err != nil {
+		return err
+	}
+	dop := new(client.DeleteObjectParams)
+	dop.WithAddress(address)
+	return conn.DeleteObject(ctx, dop)
 }

api/user-auth.go

@@ -1,14 +1,20 @@
 package api
 
 import (
+	"context"
 	"net/http"
 
 	"github.com/gorilla/mux"
-	sdk "github.com/nspcc-dev/cdn-sdk"
 	"github.com/nspcc-dev/neofs-s3-gw/api/auth"
 	"go.uber.org/zap"
 )
 
+// KeyWrapper is wrapper for context keys.
+type KeyWrapper string
+
+// BearerTokenKey is an ID used to store bearer token in a context.
+var BearerTokenKey = KeyWrapper("__context_bearer_token_key")
+
 // AttachUserAuth adds user authentication via center to router using log for logging.
 func AttachUserAuth(router *mux.Router, center auth.Center, log *zap.Logger) {
 	router.Use(func(h http.Handler) http.Handler {
@@ -21,7 +27,7 @@ func AttachUserAuth(router *mux.Router, center auth.Center, log *zap.Logger) {
 			}
 
 			h.ServeHTTP(w, r.WithContext(
-				sdk.SetBearerToken(r.Context(), token)))
+				context.WithValue(r.Context(), BearerTokenKey, token)))
 		})
 	})
 }

authmate/authmate.go

@@ -3,6 +3,8 @@ package authmate
 import (
 	"context"
 	"crypto/ecdsa"
+	"crypto/sha256"
+	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -10,31 +12,34 @@ import (
 	"strconv"
 	"time"
 
-	sdk "github.com/nspcc-dev/cdn-sdk"
-	"github.com/nspcc-dev/cdn-sdk/creds/bearer"
-	"github.com/nspcc-dev/cdn-sdk/creds/hcs"
-	"github.com/nspcc-dev/cdn-sdk/creds/neofs"
-	"github.com/nspcc-dev/cdn-sdk/creds/s3"
 	"github.com/nspcc-dev/neofs-api-go/pkg/acl/eacl"
 	"github.com/nspcc-dev/neofs-api-go/pkg/container"
 	"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
 	"github.com/nspcc-dev/neofs-api-go/pkg/object"
 	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
 	"github.com/nspcc-dev/neofs-api-go/pkg/token"
+	sdk "github.com/nspcc-dev/neofs-http-gw/neofs"
 	"github.com/nspcc-dev/neofs-node/pkg/policy"
+	"github.com/nspcc-dev/neofs-s3-gw/creds/bearer"
+	"github.com/nspcc-dev/neofs-s3-gw/creds/hcs"
+	"github.com/nspcc-dev/neofs-s3-gw/creds/neofs"
 	"go.uber.org/zap"
 )
 
-const defaultAuthContainerBasicACL uint32 = 0b00111100100011001000110011001100
+const (
+	defaultAuthContainerBasicACL uint32 = 0b00111100100011001000110011001100
+	containerCreationTimeout            = 120 * time.Second
+	containerPollInterval               = 5 * time.Second
+)
 
 // Agent contains client communicating with NeoFS and logger.
 type Agent struct {
-	cli sdk.Client
+	cli sdk.ClientPlant
 	log *zap.Logger
 }
 
 // New creates an object of type Agent that consists of Client and logger.
-func New(log *zap.Logger, client sdk.Client) *Agent {
+func New(log *zap.Logger, client sdk.ClientPlant) *Agent {
 	return &Agent{log: log, cli: client}
 }
 
@@ -70,9 +75,14 @@ type (
 )
 
 func (a *Agent) checkContainer(ctx context.Context, cid *container.ID, friendlyName string) (*container.ID, error) {
+	conn, _, err := a.cli.ConnectionArtifacts()
+	if err != nil {
+		return nil, err
+	}
+
 	if cid != nil {
 		// check that container exists
-		_, err := a.cli.Container().Get(ctx, cid)
+		_, err = conn.GetContainer(ctx, cid)
 		return cid, err
 	}
 
@@ -87,9 +97,31 @@ func (a *Agent) checkContainer(ctx context.Context, cid *container.ID, friendlyN
 		container.WithAttribute(container.AttributeName, friendlyName),
 		container.WithAttribute(container.AttributeTimestamp, strconv.FormatInt(time.Now().Unix(), 10)))
 
-	return a.cli.Container().Put(ctx, cnr,
+	cid, err = conn.PutContainer(ctx, cnr)
-		sdk.ContainerPutAndWait(),
+	if err != nil {
-		sdk.ContainerPutWithTimeout(120*time.Second))
+		return nil, err
+	}
+
+	wctx, cancel := context.WithTimeout(ctx, containerCreationTimeout)
+	defer cancel()
+	ticker := time.NewTimer(containerPollInterval)
+	defer ticker.Stop()
+	wdone := wctx.Done()
+	done := ctx.Done()
+	for {
+		select {
+		case <-done:
+			return nil, ctx.Err()
+		case <-wdone:
+			return nil, wctx.Err()
+		case <-ticker.C:
+			_, err = conn.GetContainer(ctx, cid)
+			if err == nil {
+				return cid, nil
+			}
+			ticker.Reset(containerPollInterval)
+		}
+	}
 }
 
 // IssueSecret creates an auth token, puts it in the NeoFS network and writes to io.Writer a new secret access key.
@@ -121,13 +153,13 @@ func (a *Agent) IssueSecret(ctx context.Context, w io.Writer, options *IssueSecr
 		zap.Stringer("owner_tkn", tkn.Issuer()))
 
 	address, err := bearer.
-		New(a.cli.Object(), options.OwnerPrivateKey).
+		New(a.cli, options.OwnerPrivateKey).
 		Put(ctx, cid, tkn, options.GatesPublicKeys...)
 	if err != nil {
 		return fmt.Errorf("failed to put bearer token: %w", err)
 	}
 
-	secret, err := s3.SecretAccessKey(tkn)
+	secret, err := BearerToAccessKey(tkn)
 	if err != nil {
 		return fmt.Errorf("failed to get bearer token secret key: %w", err)
 	}
@@ -146,7 +178,7 @@ func (a *Agent) IssueSecret(ctx context.Context, w io.Writer, options *IssueSecr
 // ObtainSecret receives an existing secret access key from NeoFS and
 // writes to io.Writer the secret access key.
 func (a *Agent) ObtainSecret(ctx context.Context, w io.Writer, options *ObtainSecretOptions) error {
-	bearerCreds := bearer.New(a.cli.Object(), options.GatePrivateKey)
+	bearerCreds := bearer.New(a.cli, options.GatePrivateKey)
 	address := object.NewAddress()
 	if err := address.Parse(options.SecretAddress); err != nil {
 		return fmt.Errorf("failed to parse secret address: %w", err)
@@ -157,7 +189,7 @@ func (a *Agent) ObtainSecret(ctx context.Context, w io.Writer, options *ObtainSe
 		return fmt.Errorf("failed to get bearer token: %w", err)
 	}
 
-	secret, err := s3.SecretAccessKey(tkn)
+	secret, err := BearerToAccessKey(tkn)
 	if err != nil {
 		return fmt.Errorf("failed to get bearer token secret key: %w", err)
 	}
@@ -234,3 +266,14 @@ func buildBearerToken(key *ecdsa.PrivateKey, oid *owner.ID, table *eacl.Table) (
 
 	return bearerToken, bearerToken.SignToken(key)
 }
+
+// BearerToAccessKey returns secret access key generated from given BearerToken.
+func BearerToAccessKey(tkn *token.BearerToken) (string, error) {
+	data, err := tkn.Marshal()
+	if err != nil {
+		return "", err
+	}
+
+	hash := sha256.Sum256(data)
+	return hex.EncodeToString(hash[:]), nil
+}

cmd/authmate/main.go

@@ -6,15 +6,16 @@ import (
 	"encoding/json"
 	"fmt"
 	"os"
+	"os/signal"
+	"syscall"
 	"time"
 
-	sdk "github.com/nspcc-dev/cdn-sdk"
-	"github.com/nspcc-dev/cdn-sdk/creds/hcs"
-	"github.com/nspcc-dev/cdn-sdk/creds/neofs"
-	"github.com/nspcc-dev/cdn-sdk/grace"
-	"github.com/nspcc-dev/cdn-sdk/pool"
 	"github.com/nspcc-dev/neofs-api-go/pkg/container"
+	"github.com/nspcc-dev/neofs-http-gw/connections"
+	sdk "github.com/nspcc-dev/neofs-http-gw/neofs"
 	"github.com/nspcc-dev/neofs-s3-gw/authmate"
+	"github.com/nspcc-dev/neofs-s3-gw/creds/hcs"
+	"github.com/nspcc-dev/neofs-s3-gw/creds/neofs"
 	"github.com/nspcc-dev/neofs-s3-gw/internal/version"
 	"github.com/urfave/cli/v2"
 	"go.uber.org/zap"
@@ -66,10 +67,11 @@ func prepare() (context.Context, *zap.Logger) {
 	var (
 		err    error
 		log    = zap.NewNop()
+		ctx, _ = signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
 	)
 
 	if !logEnabledFlag {
-		return grace.Context(log), log
+		return ctx, log
 	} else if logDebugEnabledFlag {
 		zapConfig.Level = zap.NewAtomicLevelAt(zapcore.DebugLevel)
 	}
@@ -78,7 +80,7 @@ func prepare() (context.Context, *zap.Logger) {
 		panic(err)
 	}
 
-	return grace.Context(log), log
+	return ctx, log
 }
 
 func main() {
@@ -363,25 +365,23 @@ func fetchHCSCredentials(val string) (hcs.Credentials, error) {
 	return hcs.NewCredentials(val)
 }
 
-func createSDKClient(ctx context.Context, log *zap.Logger, neofsCreds neofs.Credentials, peerAddress string) (sdk.Client, error) {
+func createSDKClient(ctx context.Context, log *zap.Logger, neofsCreds neofs.Credentials, peerAddress string) (sdk.ClientPlant, error) {
 	log.Debug("prepare connection pool")
 
-	p, err := pool.New(ctx,
+	pb := new(connections.PoolBuilder)
-		pool.WithLogger(log),
+	pb.AddNode(peerAddress, 1)
-		pool.WithAddress(peerAddress),
+
-		pool.WithCredentials(neofsCreds),
+	opts := &connections.PoolBuilderOptions{
-		pool.WithAPIPreparer(sdk.APIPreparer),
+		Key:                   neofsCreds.PrivateKey(),
-		pool.WithConnectTimeout(poolConnectTimeout),
+		NodeConnectionTimeout: poolConnectTimeout,
-		pool.WithRequestTimeout(poolRequestTimeout))
+		NodeRequestTimeout:    poolRequestTimeout,
+	}
+	pool, err := pb.Build(ctx, opts)
 	if err != nil {
 		return nil, fmt.Errorf("failed to create connection pool: %w", err)
 	}
 
 	log.Debug("prepare sdk client")
 
-	return sdk.New(ctx,
+	return sdk.NewClientPlant(ctx, pool, neofsCreds)
-		sdk.WithLogger(log),
-		sdk.WithCredentials(neofsCreds),
-		sdk.WithConnectionPool(p),
-		sdk.WithAPIPreparer(sdk.APIPreparer))
 }

cmd/s3-gw/app-healthy.go

@@ -18,6 +18,7 @@ const (
 	defaultContentType = "text/plain; charset=utf-8"
 )
 
+//nolint:deadcode,unused // TODO
 func attachHealthy(r *mux.Router, h Healthy) {
 	healthy := r.PathPrefix(systemPath + "/-").
 		Subrouter().

cmd/s3-gw/app-settings.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/nspcc-dev/neofs-http-gw/connections"
 	"github.com/nspcc-dev/neofs-s3-gw/internal/version"
 	"github.com/spf13/pflag"
 	"github.com/spf13/viper"
@@ -110,8 +111,8 @@ var ignore = map[string]struct{}{
 
 func (empty) Read([]byte) (int, error) { return 0, io.EOF }
 
-func fetchPeers(l *zap.Logger, v *viper.Viper) map[string]float64 {
+func fetchPeers(l *zap.Logger, v *viper.Viper) *connections.PoolBuilder {
-	peers := make(map[string]float64)
+	pb := new(connections.PoolBuilder)
 
 	for i := 0; ; i++ {
 		key := cfgPeers + "." + strconv.Itoa(i) + "."
@@ -122,14 +123,17 @@ func fetchPeers(l *zap.Logger, v *viper.Viper) map[string]float64 {
 			l.Warn("skip, empty address")
 			break
 		}
+		if weight <= 0 { // unspecified or wrong
+			weight = 1
+		}
+		pb.AddNode(address, weight)
 
-		peers[address] = weight
+		l.Info("added connection peer",
-		l.Info("add connection peer",
 			zap.String("address", address),
 			zap.Float64("weight", weight))
 	}
 
-	return peers
+	return pb
 }
 
 func fetchDomains(v *viper.Viper) []string {

cmd/s3-gw/app.go

@@ -2,29 +2,26 @@ package main
 
 import (
 	"context"
-	"errors"
+	"math"
 	"net"
 	"net/http"
-	"os"
 
-	sdk "github.com/nspcc-dev/cdn-sdk"
+	"github.com/nspcc-dev/neofs-http-gw/connections"
-	"github.com/nspcc-dev/cdn-sdk/creds/hcs"
+	sdk "github.com/nspcc-dev/neofs-http-gw/neofs"
-	"github.com/nspcc-dev/cdn-sdk/creds/neofs"
-	"github.com/nspcc-dev/cdn-sdk/pool"
 	"github.com/nspcc-dev/neofs-s3-gw/api"
 	"github.com/nspcc-dev/neofs-s3-gw/api/auth"
 	"github.com/nspcc-dev/neofs-s3-gw/api/handler"
 	"github.com/nspcc-dev/neofs-s3-gw/api/layer"
+	"github.com/nspcc-dev/neofs-s3-gw/creds/hcs"
+	"github.com/nspcc-dev/neofs-s3-gw/creds/neofs"
 	"github.com/spf13/viper"
 	"go.uber.org/zap"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/keepalive"
 )
 
 type (
 	// App is the main application structure.
 	App struct {
-		cli pool.Client
+		cli sdk.ClientPlant
 		ctr auth.Center
 		log *zap.Logger
 		cfg *viper.Viper
@@ -46,10 +43,10 @@ type (
 
 func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {
 	var (
+		pool   connections.Pool
 		err    error
 		tls    *tlsConfig
-		cli    sdk.Client
+		cli    sdk.ClientPlant
-		con    pool.Client
 		caller api.Handler
 		ctr    auth.Center
 		obj    layer.Client
@@ -57,7 +54,7 @@ func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {
 		hcsCred hcs.Credentials
 		nfsCred neofs.Credentials
 
-		peers = fetchPeers(l, v)
+		poolPeers = fetchPeers(l, v)
 
 		reBalance  = defaultRebalanceTimer
 		conTimeout = defaultConnectTimeout
@@ -109,56 +106,30 @@ func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {
 		zap.String("HCS", hcsCredential),
 		zap.String("NeoFS", nfsCredential))
 
-	poolOptions := []pool.Option{
+	opts := &connections.PoolBuilderOptions{
-		pool.WithLogger(l),
+		Key:                     nfsCred.PrivateKey(),
-		pool.WithWeightPool(peers),
+		NodeConnectionTimeout:   conTimeout,
-		pool.WithCredentials(nfsCred),
+		NodeRequestTimeout:      reqTimeout,
-		pool.WithTickerTimeout(reBalance),
+		ClientRebalanceInterval: reBalance,
-		pool.WithConnectTimeout(conTimeout),
+		SessionExpirationEpoch:  math.MaxUint64,
-		pool.WithRequestTimeout(reqTimeout),
+		KeepaliveTime:           v.GetDuration(cfgKeepaliveTime),
-		pool.WithAPIPreparer(sdk.APIPreparer),
+		KeepaliveTimeout:        v.GetDuration(cfgKeepaliveTimeout),
-		pool.WithGRPCOptions(
+		KeepalivePermitWoStream: v.GetBool(cfgKeepalivePermitWithoutStream),
-			grpc.WithBlock(),
-			grpc.WithInsecure(),
-			grpc.WithKeepaliveParams(keepalive.ClientParameters{
-				Time:                v.GetDuration(cfgKeepaliveTime),
-				Timeout:             v.GetDuration(cfgKeepaliveTimeout),
-				PermitWithoutStream: v.GetBool(cfgKeepalivePermitWithoutStream),
-			}))}
-
-	if con, err = pool.New(ctx, poolOptions...); err != nil {
-		l.Fatal("could not prepare pool connections", zap.Error(err))
 	}
-
+	pool, err = poolPeers.Build(ctx, opts)
-	{ // should establish connection with NeoFS Storage Nodes
+	if err != nil {
-		ctx, cancel := context.WithTimeout(ctx, conTimeout)
+		l.Fatal("failed to create connection pool", zap.Error(err))
-		defer cancel()
-
-		if _, err = con.Connection(ctx); err != nil {
-			if errors.Is(err, context.Canceled) {
-				l.Info("connection canceled")
-				os.Exit(0)
 	}
-
+	cli, err = sdk.NewClientPlant(ctx, pool, nfsCred)
-			l.Fatal("could not establish connection",
+	if err != nil {
-				zap.Error(err))
+		l.Fatal("failed to create neofs client plant")
-		}
-	}
-
-	if cli, err = sdk.New(ctx,
-		sdk.WithLogger(l),
-		sdk.WithConnectionPool(con),
-		sdk.WithCredentials(nfsCred),
-		sdk.WithAPIPreparer(sdk.APIPreparer)); err != nil {
-		l.Fatal("could not prepare sdk client",
-			zap.Error(err))
 	}
 
 	// prepare object layer
 	obj = layer.NewLayer(l, cli)
 
 	// prepare auth center
-	ctr = auth.New(cli.Object(), hcsCred.PrivateKey())
+	ctr = auth.New(cli, hcsCred.PrivateKey())
 
 	if caller, err = handler.New(l, obj); err != nil {
 		l.Fatal("could not initialize API handler", zap.Error(err))
@@ -166,7 +137,7 @@ func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {
 
 	return &App{
 		ctr: ctr,
-		cli: con,
+		cli: cli,
 		log: l,
 		cfg: v,
 		obj: obj,
@@ -184,12 +155,7 @@ func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {
 func (a *App) Wait() {
 	a.log.Info("application started")
 
-	select {
+	<-a.webDone // wait for web-server to be stopped
-	case <-a.wrkDone: // wait for worker is stopped
-		<-a.webDone
-	case <-a.webDone: // wait for web-server is stopped
-		<-a.wrkDone
-	}
 
 	a.log.Info("application finished")
 }
@@ -212,7 +178,7 @@ func (a *App) Server(ctx context.Context) {
 	router := newS3Router()
 
 	// Attach app-specific routes:
-	attachHealthy(router, a.cli)
+	//	attachHealthy(router, a.cli)
 	attachMetrics(router, a.cfg, a.log)
 	attachProfiler(router, a.cfg, a.log)
 
@@ -258,10 +224,3 @@ func (a *App) Server(ctx context.Context) {
 
 	close(a.webDone)
 }
-
-// Worker runs client worker.
-func (a *App) Worker(ctx context.Context) {
-	a.cli.Worker(ctx)
-	a.log.Info("stopping worker")
-	close(a.wrkDone)
-}

cmd/s3-gw/main.go

@@ -1,8 +1,11 @@
 package main
 
 import (
-	"github.com/nspcc-dev/cdn-sdk/grace"
+	"context"
-	"github.com/nspcc-dev/cdn-sdk/logger"
+	"os/signal"
+	"syscall"
+
+	"github.com/nspcc-dev/neofs-http-gw/logger"
 	"github.com/spf13/viper"
 	"go.uber.org/zap"
 )
@@ -41,12 +44,11 @@ func main() {
 	var (
 		v    = newSettings()
 		l    = newLogger(v)
-		g = grace.Context(l)
+		g, _ = signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
 		a    = newApp(g, l, v)
 	)
 
 	go a.Server(g)
-	go a.Worker(g)
 
 	a.Wait()
 }

creds/accessbox/accessbox.go

@@ -0,0 +1,29 @@
+package accessbox
+
+import "github.com/nspcc-dev/neofs-api-go/pkg/token"
+
+type (
+	// Box provides marshalling/unmarshalling for the token.
+	Box interface {
+		Marshal() ([]byte, error)
+		Unmarshal([]byte) error
+	}
+
+	// Encoder provides encoding method.
+	Encoder interface {
+		Encode(Box) error
+	}
+
+	// Decoder provides decoding method.
+	Decoder interface {
+		Decode(Box) error
+	}
+
+	// BearerTokenBox is a marshalling/unmarshalling bearer token wrapper.
+	BearerTokenBox interface {
+		Box
+
+		Token() *token.BearerToken
+		SetToken(*token.BearerToken)
+	}
+)

creds/accessbox/bearer_token.go

@@ -0,0 +1,43 @@
+package accessbox
+
+import (
+	"github.com/nspcc-dev/neofs-api-go/pkg/token"
+)
+
+type bearerBox struct {
+	tkn *token.BearerToken
+}
+
+// NewBearerBox wraps given bearer token into BearerTokenBox.
+func NewBearerBox(token *token.BearerToken) BearerTokenBox {
+	return &bearerBox{tkn: token}
+}
+
+// Marshal serializes bearer token.
+func (b *bearerBox) Marshal() ([]byte, error) {
+	return b.tkn.Marshal(nil)
+}
+
+// Marshal initializes bearer box from its serialized representation.
+func (b *bearerBox) Unmarshal(data []byte) error {
+	tkn := token.NewBearerToken()
+
+	err := tkn.Unmarshal(data)
+	if err != nil {
+		return err
+	}
+
+	b.SetToken(tkn)
+
+	return nil
+}
+
+// Token unwraps bearer token from the box.
+func (b *bearerBox) Token() *token.BearerToken {
+	return b.tkn
+}
+
+// SetToken sets new token in the box.
+func (b *bearerBox) SetToken(tkn *token.BearerToken) {
+	b.tkn = tkn
+}

creds/accessbox/bearer_token_test.go

@@ -0,0 +1,161 @@
+package accessbox
+
+import (
+	"bytes"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+	"encoding/binary"
+	"strconv"
+	"testing"
+
+	"github.com/nspcc-dev/neofs-api-go/pkg/acl/eacl"
+	"github.com/nspcc-dev/neofs-api-go/pkg/token"
+	"github.com/nspcc-dev/neofs-s3-gw/creds/hcs"
+	"github.com/stretchr/testify/require"
+)
+
+func Test_encrypt_decrypt(t *testing.T) {
+	tkn := token.NewBearerToken()
+	box := NewBearerBox(tkn)
+
+	sec, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	require.NoError(t, err)
+
+	cred, err := hcs.Generate(rand.Reader)
+	require.NoError(t, err)
+
+	tkn.SetEACLTable(eacl.NewTable())
+	require.NoError(t, tkn.SignToken(sec))
+
+	data, err := box.Marshal()
+	require.NoError(t, err)
+
+	encrypted, err := encrypt(cred.PrivateKey(), cred.PublicKey(), data)
+	require.NoError(t, err)
+
+	decrypted, err := decrypt(cred.PrivateKey(), cred.PublicKey(), encrypted)
+	require.NoError(t, err)
+
+	require.Equal(t, data, decrypted)
+}
+
+func Test_encrypt_decrypt_step_by_step(t *testing.T) {
+	tkn := token.NewBearerToken()
+	box := NewBearerBox(tkn)
+
+	sec, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	require.NoError(t, err)
+
+	cred, err := hcs.Generate(rand.Reader)
+	require.NoError(t, err)
+
+	tkn.SetEACLTable(eacl.NewTable())
+	require.NoError(t, tkn.SignToken(sec))
+
+	data, err := box.Marshal()
+	require.NoError(t, err)
+
+	buf := new(bytes.Buffer)
+	_, err = cred.PublicKey().WriteTo(buf)
+	require.NoError(t, err)
+
+	encrypted, err := encrypt(cred.PrivateKey(), cred.PublicKey(), data)
+	require.NoError(t, err)
+
+	length := len(encrypted)
+	temp := make([]byte, length+binary.MaxVarintLen64)
+	size := binary.PutVarint(temp, int64(length))
+	copy(temp[size:], encrypted)
+	buf.Write(temp[:length+size])
+
+	sender, err := hcs.NewPublicKeyFromReader(buf)
+	require.NoError(t, err)
+
+	require.Equal(t, cred.PublicKey(), sender)
+
+	ln, err := binary.ReadVarint(buf)
+	require.NoError(t, err)
+	require.Equal(t, int64(length), ln)
+
+	enc := make([]byte, ln)
+	n, err := buf.Read(enc)
+	require.NoError(t, err)
+	require.Equal(t, length, n)
+	require.Equal(t, encrypted, enc)
+
+	decrypted, err := decrypt(cred.PrivateKey(), sender, enc)
+	require.NoError(t, err)
+	require.Equal(t, data, decrypted)
+}
+
+func TestSingleKey_AccessBox(t *testing.T) {
+	tkn := token.NewBearerToken()
+	expect := NewBearerBox(tkn)
+	actual := NewBearerBox(nil)
+
+	sec, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	require.NoError(t, err)
+
+	cred, err := hcs.Generate(rand.Reader)
+	require.NoError(t, err)
+
+	tkn.SetEACLTable(eacl.NewTable())
+	require.NoError(t, tkn.SignToken(sec))
+
+	data, err := Encode(expect, cred.PrivateKey(), cred.PublicKey())
+	require.NoError(t, err)
+
+	require.NoError(t, Decode(data, actual, cred.PrivateKey()))
+	require.Equal(t, expect, actual)
+}
+
+func TestBearerToken_AccessBox(t *testing.T) {
+	tkn := token.NewBearerToken()
+	box := NewBearerBox(tkn)
+	sec, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	require.NoError(t, err)
+
+	cred, err := hcs.Generate(rand.Reader)
+	require.NoError(t, err)
+
+	tkn.SetEACLTable(eacl.NewTable())
+	require.NoError(t, tkn.SignToken(sec))
+
+	count := 10
+	pubs := make([]hcs.PublicKey, 0, count)
+	keys := make([]hcs.PrivateKey, 0, count)
+	{ // generate keys
+		for i := 0; i < count; i++ {
+			cred, err := hcs.Generate(rand.Reader)
+			require.NoError(t, err)
+
+			pubs = append(pubs, cred.PublicKey())
+			keys = append(keys, cred.PrivateKey())
+		}
+	}
+
+	buf := new(bytes.Buffer)
+	require.NoError(t, NewEncoder(buf, cred.PrivateKey(), pubs...).Encode(box))
+
+	data := buf.Bytes()
+
+	for i := range keys {
+		key := keys[i]
+		t.Run("try with key "+strconv.Itoa(i), func(t *testing.T) {
+			r := bytes.NewReader(data)
+			nbx := NewBearerBox(nil)
+			require.NoError(t, NewDecoder(r, key).Decode(nbx))
+			require.Equal(t, tkn, nbx.Token())
+		})
+	}
+
+	t.Run("should fail for unknown key", func(t *testing.T) {
+		cred, err = hcs.Generate(rand.Reader)
+		require.NoError(t, err)
+
+		r := bytes.NewReader(data)
+		nbx := NewBearerBox(nil)
+		require.EqualError(t, NewDecoder(r, cred.PrivateKey()).Decode(nbx), "chacha20poly1305: message authentication failed")
+	})
+}

creds/accessbox/decoder.go

@@ -0,0 +1,88 @@
+package accessbox
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"io"
+
+	"github.com/nspcc-dev/neofs-s3-gw/creds/hcs"
+	"golang.org/x/crypto/chacha20poly1305"
+	"golang.org/x/crypto/curve25519"
+)
+
+type decoder struct {
+	*bufio.Reader
+
+	key hcs.PrivateKey
+}
+
+// NewDecoder returns new private key decoder.
+func NewDecoder(r io.Reader, key hcs.PrivateKey) Decoder {
+	return &decoder{Reader: bufio.NewReader(r), key: key}
+}
+
+func decrypt(owner hcs.PrivateKey, sender hcs.PublicKey, data []byte) ([]byte, error) {
+	sb := sender.Bytes()
+
+	key, err := curve25519.X25519(owner.Bytes(), sb)
+	if err != nil {
+		return nil, err
+	}
+
+	dec, err := chacha20poly1305.NewX(key)
+	if err != nil {
+		return nil, err
+	}
+
+	if ld, ns := len(data), dec.NonceSize(); ld < ns {
+		return nil, fmt.Errorf("wrong data size (%d), should be greater than %d", ld, ns)
+	}
+
+	nonce, cypher := data[:dec.NonceSize()], data[dec.NonceSize():]
+	return dec.Open(nil, nonce, cypher, nil)
+}
+
+func (d *decoder) Decode(box Box) error {
+	sender, err := hcs.NewPublicKeyFromReader(d)
+	if err != nil {
+		return err
+	}
+
+	var lastErr error
+
+	for {
+		size, err := binary.ReadVarint(d)
+		if err == io.EOF {
+			break
+		} else if err != nil {
+			return err
+		}
+
+		data := make([]byte, size)
+
+		if ln, err := d.Read(data); err != nil {
+			lastErr = err
+			continue
+		} else if ln != int(size) {
+			lastErr = fmt.Errorf("expect %d bytes, but read only %d bytes", size, ln)
+			continue
+		} else if decoded, err := decrypt(d.key, sender, data); err != nil {
+			lastErr = err
+			continue
+		} else if err = box.Unmarshal(decoded); err != nil {
+			lastErr = err
+			continue
+		}
+
+		return nil
+	}
+
+	return lastErr
+}
+
+// Decode unwraps serialized bearer token from data into box using owner key.
+func Decode(data []byte, box Box, owner hcs.PrivateKey) error {
+	return NewDecoder(bytes.NewBuffer(data), owner).Decode(box)
+}

creds/accessbox/encoder.go

@@ -0,0 +1,85 @@
+package accessbox
+
+import (
+	"bytes"
+	"crypto/rand"
+	"encoding/binary"
+	"fmt"
+	"io"
+
+	"github.com/nspcc-dev/neofs-s3-gw/creds/hcs"
+	"golang.org/x/crypto/chacha20poly1305"
+	"golang.org/x/crypto/curve25519"
+)
+
+type encoder struct {
+	io.Writer
+
+	owner hcs.PrivateKey
+	keys  []hcs.PublicKey
+}
+
+// NewEncoder creates encoder.
+func NewEncoder(w io.Writer, owner hcs.PrivateKey, keys ...hcs.PublicKey) Encoder {
+	return &encoder{
+		Writer: w,
+		owner:  owner,
+		keys:   keys,
+	}
+}
+
+func encrypt(owner hcs.PrivateKey, sender hcs.PublicKey, data []byte) ([]byte, error) {
+	key, err := curve25519.X25519(owner.Bytes(), sender.Bytes())
+	if err != nil {
+		return nil, err
+	}
+
+	enc, err := chacha20poly1305.NewX(key)
+	if err != nil {
+		return nil, err
+	}
+
+	nonce := make([]byte, enc.NonceSize(), enc.NonceSize()+len(data)+enc.Overhead())
+	if _, err := rand.Read(nonce); err != nil {
+		return nil, err
+	}
+
+	return enc.Seal(nonce, nonce, data, nil), nil
+}
+
+// Encode and encrypt box through owner private key and public keys.
+func (e *encoder) Encode(box Box) error {
+	data, err := box.Marshal()
+	if err != nil {
+		return err
+	}
+
+	// write owner public key
+	if _, err = e.owner.PublicKey().WriteTo(e); err != nil {
+		return err
+	}
+
+	for i, sender := range e.keys {
+		encrypted, err := encrypt(e.owner, sender, data)
+		if err != nil {
+			return fmt.Errorf("%w, sender = %d", err, i)
+		}
+
+		ln := len(encrypted)
+		temp := make([]byte, ln+binary.MaxVarintLen64)
+		size := binary.PutVarint(temp, int64(ln))
+		copy(temp[size:], encrypted)
+		if _, err := e.Write(temp[:size+ln]); err != nil {
+			return fmt.Errorf("%w, sender = %d", err, i)
+		}
+	}
+
+	return nil
+}
+
+// Encode and encrypt box through owner private key and public keys.
+func Encode(box Box, owner hcs.PrivateKey, keys ...hcs.PublicKey) ([]byte, error) {
+	buf := new(bytes.Buffer)
+	err := NewEncoder(buf, owner, keys...).Encode(box)
+	return buf.Bytes(), err
+}

creds/bearer/credentials.go

@@ -0,0 +1,140 @@
+package bearer
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"strconv"
+	"sync"
+	"time"
+
+	"github.com/nspcc-dev/neofs-api-go/pkg/client"
+	"github.com/nspcc-dev/neofs-api-go/pkg/container"
+	"github.com/nspcc-dev/neofs-api-go/pkg/object"
+	"github.com/nspcc-dev/neofs-api-go/pkg/token"
+	sdk "github.com/nspcc-dev/neofs-http-gw/neofs"
+	"github.com/nspcc-dev/neofs-s3-gw/creds/accessbox"
+	"github.com/nspcc-dev/neofs-s3-gw/creds/hcs"
+)
+
+type (
+	// Credentials is a bearer token get/put interface.
+	Credentials interface {
+		Get(context.Context, *object.Address) (*token.BearerToken, error)
+		Put(context.Context, *container.ID, *token.BearerToken, ...hcs.PublicKey) (*object.Address, error)
+	}
+
+	cred struct {
+		key hcs.PrivateKey
+		obj sdk.ClientPlant
+	}
+)
+
+var (
+	// ErrEmptyPublicKeys is returned when no HCS keys are provided.
+	ErrEmptyPublicKeys = errors.New("HCS public keys could not be empty")
+	// ErrEmptyBearerToken is returned when no bearer token is provided.
+	ErrEmptyBearerToken = errors.New("Bearer token could not be empty")
+)
+
+var bufferPool = sync.Pool{
+	New: func() interface{} {
+		return new(bytes.Buffer)
+	},
+}
+
+var _ = New
+
+// New creates new Credentials instance using given cli and key.
+func New(cli sdk.ClientPlant, key hcs.PrivateKey) Credentials {
+	return &cred{obj: cli, key: key}
+}
+
+func (c *cred) acquireBuffer() *bytes.Buffer {
+	return bufferPool.Get().(*bytes.Buffer)
+}
+
+func (c *cred) releaseBuffer(buf *bytes.Buffer) {
+	buf.Reset()
+	bufferPool.Put(buf)
+}
+
+func (c *cred) Get(ctx context.Context, address *object.Address) (*token.BearerToken, error) {
+	buf := c.acquireBuffer()
+	defer c.releaseBuffer(buf)
+
+	box := accessbox.NewBearerBox(nil)
+
+	conn, tok, err := c.obj.ConnectionArtifacts()
+	if err != nil {
+		return nil, err
+	}
+	ops := new(client.GetObjectParams).WithAddress(address).WithPayloadWriter(buf)
+
+	_, err = conn.GetObject(
+		ctx,
+		ops,
+		client.WithSession(tok),
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	err = accessbox.NewDecoder(buf, c.key).Decode(box)
+	if err != nil {
+		return nil, err
+	}
+
+	return box.Token(), nil
+}
+
+func (c *cred) Put(ctx context.Context, cid *container.ID, tkn *token.BearerToken, keys ...hcs.PublicKey) (*object.Address, error) {
+	var (
+		err error
+		buf = c.acquireBuffer()
+		box = accessbox.NewBearerBox(tkn)
+
+		created = strconv.FormatInt(time.Now().Unix(), 10)
+	)
+
+	defer c.releaseBuffer(buf)
+
+	if len(keys) == 0 {
+		return nil, ErrEmptyPublicKeys
+	} else if tkn == nil {
+		return nil, ErrEmptyBearerToken
+	} else if err = accessbox.NewEncoder(buf, c.key, keys...).Encode(box); err != nil {
+		return nil, err
+	}
+
+	conn, tok, err := c.obj.ConnectionArtifacts()
+	if err != nil {
+		return nil, err
+	}
+	timestamp := object.NewAttribute()
+	timestamp.SetKey(object.AttributeTimestamp)
+	timestamp.SetValue(created)
+
+	filename := object.NewAttribute()
+	filename.SetKey(object.AttributeFileName)
+	filename.SetValue(created + "_access.box")
+
+	raw := object.NewRaw()
+	raw.SetContainerID(cid)
+	raw.SetOwnerID(tkn.Issuer())
+	raw.SetAttributes(filename, timestamp)
+
+	ops := new(client.PutObjectParams).WithObject(raw.Object()).WithPayloadReader(buf)
+	oid, err := conn.PutObject(
+		ctx,
+		ops,
+		client.WithSession(tok),
+	)
+	if err != nil {
+		return nil, err
+	}
+	address := object.NewAddress()
+	address.SetObjectID(oid)
+	address.SetContainerID(cid)
+	return address, nil
+}

creds/hcs/credentials.go

@@ -0,0 +1,90 @@
+package hcs
+
+import (
+	"errors"
+	"io"
+
+	"golang.org/x/crypto/curve25519"
+)
+
+type (
+	// Credentials is an HCS interface (private/public key).
+	Credentials interface {
+		PublicKey() PublicKey
+		PrivateKey() PrivateKey
+	}
+
+	keyer interface {
+		io.WriterTo
+
+		Bytes() []byte
+		String() string
+	}
+
+	// PublicKey is a public key wrapper providing useful methods.
+	PublicKey interface {
+		keyer
+	}
+
+	// PrivateKey is private key wrapper providing useful methods.
+	PrivateKey interface {
+		keyer
+
+		PublicKey() PublicKey
+	}
+
+	credentials struct {
+		public PublicKey
+		secret PrivateKey
+	}
+
+	public []byte
+	secret []byte
+)
+
+// ErrEmptyCredentials is returned when no credentials are provided.
+var ErrEmptyCredentials = errors.New("empty credentials")
+
+var _ = NewCredentials
+
+// Generate generates new key pair using given source of randomness.
+func Generate(r io.Reader) (Credentials, error) {
+	buf := make([]byte, curve25519.ScalarSize)
+
+	if _, err := r.Read(buf); err != nil {
+		return nil, err
+	}
+
+	sk := secret(buf)
+	return &credentials{
+		secret: &sk,
+		public: sk.PublicKey(),
+	}, nil
+}
+
+// NewCredentials loads private key from the string given and returns Credentials wrapper.
+func NewCredentials(val string) (Credentials, error) {
+	if val == "" {
+		return nil, ErrEmptyCredentials
+	}
+
+	sk, err := loadPrivateKey(val)
+	if err != nil {
+		return nil, err
+	}
+
+	return &credentials{
+		secret: sk,
+		public: sk.PublicKey(),
+	}, nil
+}
+
+// PublicKey returns public key.
+func (c *credentials) PublicKey() PublicKey {
+	return c.public
+}
+
+// PrivateKey returns private key.
+func (c *credentials) PrivateKey() PrivateKey {
+	return c.secret
+}

creds/hcs/public.go

@@ -0,0 +1,65 @@
+package hcs
+
+import (
+	"encoding/hex"
+	"io"
+	"io/ioutil"
+	"os"
+
+	"golang.org/x/crypto/curve25519"
+)
+
+func (p *public) Bytes() []byte {
+	buf := make([]byte, curve25519.PointSize)
+	copy(buf, *p)
+	return buf
+}
+
+func (p *public) String() string {
+	buf := p.Bytes()
+	return hex.EncodeToString(buf)
+}
+
+func (p *public) WriteTo(w io.Writer) (int64, error) {
+	pb := p.Bytes()
+	pl, err := w.Write(pb)
+	return int64(pl), err
+}
+
+func publicKeyFromBytes(v []byte) (PublicKey, error) {
+	pub := public(v)
+	return &pub, nil
+}
+
+func publicKeyFromString(val string) (PublicKey, error) {
+	v, err := hex.DecodeString(val)
+	if err != nil {
+		return nil, err
+	}
+
+	return publicKeyFromBytes(v)
+}
+
+// NewPublicKeyFromReader reads new public key from given reader.
+func NewPublicKeyFromReader(r io.Reader) (PublicKey, error) {
+	data := make([]byte, curve25519.PointSize)
+	if _, err := r.Read(data); err != nil {
+		return nil, err
+	}
+
+	return publicKeyFromBytes(data)
+}
+
+// LoadPublicKey loads public key from given file or (serialized) string.
+func LoadPublicKey(val string) (PublicKey, error) {
+	data, err := ioutil.ReadFile(val)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return publicKeyFromString(val)
+		}
+
+		return nil, err
+	}
+
+	return publicKeyFromBytes(data)
+}

creds/hcs/secret.go

@@ -0,0 +1,60 @@
+package hcs
+
+import (
+	"encoding/hex"
+	"io"
+	"io/ioutil"
+	"os"
+
+	"golang.org/x/crypto/curve25519"
+)
+
+func (s *secret) Bytes() []byte {
+	buf := make([]byte, curve25519.ScalarSize)
+	copy(buf, *s)
+	return buf
+}
+
+func (s *secret) String() string {
+	buf := s.Bytes()
+	return hex.EncodeToString(buf)
+}
+
+func (s *secret) PublicKey() PublicKey {
+	sk := s.Bytes()
+
+	pb, _ := curve25519.X25519(sk, curve25519.Basepoint)
+	pk := public(pb)
+	return &pk
+}
+
+func (s *secret) WriteTo(w io.Writer) (int64, error) {
+	sb := s.Bytes()
+	sl, err := w.Write(sb)
+	return int64(sl), err
+}
+
+func privateKeyFromBytes(val []byte) (PrivateKey, error) {
+	sk := secret(val)
+	return &sk, nil
+}
+
+func privateKeyFromString(val string) (PrivateKey, error) {
+	data, err := hex.DecodeString(val)
+	if err != nil {
+		return nil, err
+	}
+
+	return privateKeyFromBytes(data)
+}
+
+func loadPrivateKey(val string) (PrivateKey, error) {
+	data, err := ioutil.ReadFile(val)
+	if os.IsNotExist(err) {
+		return privateKeyFromString(val)
+	} else if err != nil {
+		return nil, err
+	}
+
+	return privateKeyFromBytes(data)
+}

creds/neofs/credentials.go

@@ -0,0 +1,71 @@
+package neofs
+
+import (
+	"crypto/ecdsa"
+
+	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
+	crypto "github.com/nspcc-dev/neofs-crypto"
+)
+
+type (
+	// Credentials contains methods that needed to work with NeoFS.
+	Credentials interface {
+		WIF() string
+		Owner() *owner.ID
+		PublicKey() *ecdsa.PublicKey
+		PrivateKey() *ecdsa.PrivateKey
+	}
+
+	cred struct {
+		key   *ecdsa.PrivateKey
+		owner *owner.ID
+		wif   string
+	}
+)
+
+// New creates an instance of Credentials through string representation of secret.
+//     It allows passing WIF, path, hex-encoded and others.
+func New(secret string) (Credentials, error) {
+	key, err := crypto.LoadPrivateKey(secret)
+	if err != nil {
+		return nil, err
+	}
+
+	return setFromPrivateKey(key)
+}
+
+// PrivateKey returns ecdsa.PrivateKey.
+func (c *cred) PrivateKey() *ecdsa.PrivateKey {
+	return c.key
+}
+
+// PublicKey returns ecdsa.PublicKey.
+func (c *cred) PublicKey() *ecdsa.PublicKey {
+	return &c.key.PublicKey
+}
+
+// Owner returns owner.ID.
+func (c *cred) Owner() *owner.ID {
+	return c.owner
+}
+
+// WIF returns string representation of WIF.
+func (c *cred) WIF() string {
+	return c.wif
+}
+
+func setFromPrivateKey(key *ecdsa.PrivateKey) (*cred, error) {
+	wallet, err := owner.NEO3WalletFromPublicKey(&key.PublicKey)
+	if err != nil {
+		return nil, err
+	}
+
+	ownerID := owner.NewIDFromNeo3Wallet(wallet)
+
+	wif, err := crypto.WIFEncode(key)
+	if err != nil {
+		return nil, err
+	}
+
+	return &cred{key: key, owner: ownerID, wif: wif}, nil
+}

creds/neofs/credentials_test.go

@@ -0,0 +1,40 @@
+package neofs
+
+import (
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+	"testing"
+
+	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
+	crypto "github.com/nspcc-dev/neofs-crypto"
+	"github.com/stretchr/testify/require"
+)
+
+func TestNew(t *testing.T) {
+	t.Run("should fail", func(t *testing.T) {
+		cred, err := New("")
+		require.Nil(t, cred)
+		require.Error(t, err)
+	})
+
+	t.Run("should work as expected", func(t *testing.T) {
+		key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+		require.NoError(t, err)
+
+		wif, err := crypto.WIFEncode(key)
+		require.NoError(t, err)
+
+		wallet, err := owner.NEO3WalletFromPublicKey(&key.PublicKey)
+		require.NoError(t, err)
+
+		own := owner.NewIDFromNeo3Wallet(wallet)
+
+		cred, err := New(wif)
+		require.NoError(t, err)
+		require.Equal(t, cred.WIF(), wif)
+		require.Equal(t, cred.Owner(), own)
+		require.Equal(t, cred.PrivateKey(), key)
+		require.Equal(t, cred.PublicKey(), &key.PublicKey)
+	})
+}

go.mod

@@ -1,13 +1,14 @@
 module github.com/nspcc-dev/neofs-s3-gw
 
-go 1.14
+go 1.16
 
 require (
 	github.com/aws/aws-sdk-go v1.37.9
 	github.com/google/uuid v1.2.0
 	github.com/gorilla/mux v1.8.0
-	github.com/nspcc-dev/cdn-sdk v0.3.4
+	github.com/nspcc-dev/neofs-api-go v1.26.1
-	github.com/nspcc-dev/neofs-api-go v1.23.0
+	github.com/nspcc-dev/neofs-crypto v0.3.0
+	github.com/nspcc-dev/neofs-http-gw v0.15.1
 	github.com/nspcc-dev/neofs-node v1.22.0
 	github.com/prometheus/client_golang v1.9.0
 	github.com/spf13/pflag v1.0.5
@@ -15,5 +16,6 @@ require (
 	github.com/stretchr/testify v1.7.0
 	github.com/urfave/cli/v2 v2.3.0
 	go.uber.org/zap v1.16.0
-	google.golang.org/grpc v1.35.0
+	golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2
+	google.golang.org/grpc v1.36.1
 )

go.sum

@@ -40,6 +40,8 @@ github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRF
 github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
 github.com/alicebob/gopher-json v0.0.0-20180125190556-5a6b3ba71ee6/go.mod h1:SGnFV6hVsYE877CKEZ6tDNTjaSXYUk6QqoIK6PrAtcc=
 github.com/alicebob/miniredis v2.5.0+incompatible/go.mod h1:8HZjEj4yU0dwhYHky+DxYx+6BMjkBbe5ONFIF1MXffk=
+github.com/andybalholm/brotli v1.0.0/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
+github.com/andybalholm/brotli v1.0.1/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
 github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/apache/thrift v0.13.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
@@ -122,6 +124,7 @@ github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1m
 github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/etcd-io/bbolt v1.3.3/go.mod h1:ZF2nL25h33cCyBtcyWeZ2/I3HQOfTP+0PIEvHjkjCrw=
+github.com/fasthttp/router v1.3.5/go.mod h1:BylQKgvh6YQkR0mvL60+HJyTaGwcn5d8UFNweOb/Nw8=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/flynn-archive/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:rZfgFAXFS/z/lEd6LJmf9HVZ1LkgYiHx5pHhV5DR16M=
 github.com/franela/goblin v0.0.0-20200105215937-c9ffbefa60db/go.mod h1:7dvUGVsVBjqR7JHJk0brhHOZYGmfBYOrK0ZhYMEtBr4=
@@ -256,7 +259,9 @@ github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/kkdai/bstream v0.0.0-20161212061736-f391b8402d23/go.mod h1:J+Gs4SYgM6CZQHDETBtE9HaSEkGmuNXF86RwHhHUvq4=
+github.com/klauspost/compress v1.10.7/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
 github.com/klauspost/compress v1.11.3/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
+github.com/klauspost/compress v1.11.8/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
@@ -317,27 +322,30 @@ github.com/nats-io/nats.go v1.9.1/go.mod h1:ZjDU1L/7fJ09jvUSRVBR2e7+RnLiiIQyqyzE
 github.com/nats-io/nkeys v0.1.0/go.mod h1:xpnFELMwJABBLVhffcfd1MZx6VsNRFpEugbxziKVo7w=
 github.com/nats-io/nkeys v0.1.3/go.mod h1:xpnFELMwJABBLVhffcfd1MZx6VsNRFpEugbxziKVo7w=
 github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
-github.com/nspcc-dev/cdn-sdk v0.3.4 h1:RtYWuF9xDWrkVwu6sFRWlyZ+ToYM7Y9h8B93Fg4CPEA=
-github.com/nspcc-dev/cdn-sdk v0.3.4/go.mod h1:JC4dT16H5HilyZcb8sTxL/TMC1FSEKMuFAqRsmAPoAk=
 github.com/nspcc-dev/dbft v0.0.0-20191205084618-dacb1a30c254/go.mod h1:w1Ln2aT+dBlPhLnuZhBV+DfPEdS2CHWWLp5JTScY3bw=
 github.com/nspcc-dev/dbft v0.0.0-20191209120240-0d6b7568d9ae/go.mod h1:3FjXOoHmA51EGfb5GS/HOv7VdmngNRTssSeQ729dvGY=
 github.com/nspcc-dev/dbft v0.0.0-20200117124306-478e5cfbf03a/go.mod h1:/YFK+XOxxg0Bfm6P92lY5eDSLYfp06XOdL8KAVgXjVk=
 github.com/nspcc-dev/dbft v0.0.0-20200219114139-199d286ed6c1/go.mod h1:O0qtn62prQSqizzoagHmuuKoz8QMkU3SzBoKdEvm3aQ=
 github.com/nspcc-dev/dbft v0.0.0-20200711144034-c526ccc6f570/go.mod h1:1FYQXSbb6/9HQIkoF8XO7W/S8N7AZRkBsgwbcXRvk0E=
 github.com/nspcc-dev/dbft v0.0.0-20201221101812-e13a1a1c3cb2/go.mod h1:I5D0W3tu3epdt2RMCTxS//HDr4S+OHRqajouQTOAHI8=
+github.com/nspcc-dev/dbft v0.0.0-20210302103605-cc75991b7cfb/go.mod h1:U8MSnEShH+o5hexfWJdze6uMFJteP0ko7J2frO7Yu1Y=
 github.com/nspcc-dev/hrw v1.0.9 h1:17VcAuTtrstmFppBjfRiia4K2wA/ukXZhLFS8Y8rz5Y=
 github.com/nspcc-dev/hrw v1.0.9/go.mod h1:l/W2vx83vMQo6aStyx2AuZrJ+07lGv2JQGlVkPG06MU=
 github.com/nspcc-dev/neo-go v0.73.1-pre.0.20200303142215-f5a1b928ce09/go.mod h1:pPYwPZ2ks+uMnlRLUyXOpLieaDQSEaf4NM3zHVbRjmg=
 github.com/nspcc-dev/neo-go v0.91.0/go.mod h1:G6HdOWvzQ6tlvFdvFSN/PgCzLPN/X/X4d5hTjFRUDcc=
-github.com/nspcc-dev/neo-go v0.92.0 h1:iKHpKLzpwE6RSXnQb0BoYWi+H1P/hNyQbMpPG0mY57Q=
 github.com/nspcc-dev/neo-go v0.92.0/go.mod h1:L7PyTzjK1j/PCAxvbKiVFkCMZDvsv82JbXlPxaH1t0Q=
+github.com/nspcc-dev/neo-go v0.95.0 h1:bttArYkIuhBJWSZsZ1xVW8MJsj5SvZwAhqVN3HZPNbo=
+github.com/nspcc-dev/neo-go v0.95.0/go.mod h1:bW07ge1WFXsBgqrcPpLUr6OcyQxHqM26MZNesWMdH0c=
 github.com/nspcc-dev/neofs-api-go v1.22.0/go.mod h1:G7dqincfdjBrAbL5nxVp82emF05fSVEqe59ICsoRDI8=
-github.com/nspcc-dev/neofs-api-go v1.23.0 h1:t4FB5uVY99UkYR0Hiyi1SHjZuqzf4qicw7tf7BBnkHk=
+github.com/nspcc-dev/neofs-api-go v1.24.0/go.mod h1:G7dqincfdjBrAbL5nxVp82emF05fSVEqe59ICsoRDI8=
-github.com/nspcc-dev/neofs-api-go v1.23.0/go.mod h1:G7dqincfdjBrAbL5nxVp82emF05fSVEqe59ICsoRDI8=
+github.com/nspcc-dev/neofs-api-go v1.26.1 h1:GMIuEB6Hv9IXP9SJd/1f8Df6gRriPkSplpmpJXgQ/1I=
+github.com/nspcc-dev/neofs-api-go v1.26.1/go.mod h1:SHuH1Ba3U/h3j+8HHbb3Cns1LfMlEb88guWog9Qi68Y=
 github.com/nspcc-dev/neofs-crypto v0.2.0/go.mod h1:F/96fUzPM3wR+UGsPi3faVNmFlA9KAEAUQR7dMxZmNA=
 github.com/nspcc-dev/neofs-crypto v0.2.3/go.mod h1:8w16GEJbH6791ktVqHN9YRNH3s9BEEKYxGhlFnp0cDw=
 github.com/nspcc-dev/neofs-crypto v0.3.0 h1:zlr3pgoxuzrmGCxc5W8dGVfA9Rro8diFvVnBg0L4ifM=
 github.com/nspcc-dev/neofs-crypto v0.3.0/go.mod h1:8w16GEJbH6791ktVqHN9YRNH3s9BEEKYxGhlFnp0cDw=
+github.com/nspcc-dev/neofs-http-gw v0.15.1 h1:0T0g3LeFw5XsxKeWSASNtPOpz0eblhdXmx8coIES5gw=
+github.com/nspcc-dev/neofs-http-gw v0.15.1/go.mod h1:DWrjzP7ozKolQkRKYeXrWPzQjrh+GxkFwc4N0yfE/zg=
 github.com/nspcc-dev/neofs-node v1.22.0 h1:TJ4d5zopItYYWMEajegVWBgAw8HjZFe12IkNm3Tt+rk=
 github.com/nspcc-dev/neofs-node v1.22.0/go.mod h1:ecpXrzIe1vcp5FBjPsIaHKVIVvxsv4GVBCw21WYcY3c=
 github.com/nspcc-dev/rfc6979 v0.1.0/go.mod h1:exhIh1PdpDC5vQmyEsGvc4YDM/lyQp/452QxGq/UEso=
@@ -427,6 +435,7 @@ github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/ryanuber/columnize v0.0.0-20160712163229-9b3edd62028f/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
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@@ -484,6 +493,11 @@ github.com/urfave/cli v1.22.1 h1:+mkCCcOFKPnCmVYVcURKps1Xe+3zP90gSYGNfRkjoIY=
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@@ -528,8 +542,9 @@ golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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@@ -571,10 +586,12 @@ golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLL
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@@ -609,24 +626,30 @@ golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -697,8 +720,8 @@ google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQ
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-google.golang.org/grpc v1.35.0 h1:TwIQcH3es+MojMVojxxfQ3l3OF2KzlRxML2xZq0kRo8=
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