[#1933] cli: Support binary sessions

There is a need to support NeoFS-binary sessions along with JSON ones in
NeoFS CLI.

Provide generic `common.ReadBinaryOrJSON` functions which tries to
decode NeoFS-binary structure and falls back to JSON format. Use this
function in all places with token reading.

Signed-off-by: Leonard Lyubich <ctulhurider@gmail.com>

CHANGELOG.md

@@ -21,6 +21,7 @@ Changelog for NeoFS Node
 - Setting node's network state to `MAINTENANCE` while network settings forbid it (#1916)
 - Do not panic during API client creation (#1936)
 - Correctly sign new epoch transaction in neofs-adm for a committee of more than 4 nodes (#1949)
+- Inability to provide session to NeoFS CLI in a NeoFS-binary format (#1933)
 
 ### Removed
 ### Updated

cmd/neofs-cli/internal/common/token.go

@@ -2,6 +2,7 @@ package common
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"os"
 
@@ -18,39 +19,47 @@ func ReadBearerToken(cmd *cobra.Command, flagname string) *bearer.Token {
 		return nil
 	}
 
-	data, err := os.ReadFile(path)
+	PrintVerbose("Reading bearer token from file [%s]...", path)
-	ExitOnErr(cmd, "can't read bearer token file: %w", err)
 
 	var tok bearer.Token
-	if err := tok.UnmarshalJSON(data); err != nil {
-		err = tok.Unmarshal(data)
-		ExitOnErr(cmd, "can't decode bearer token: %w", err)
 
-		PrintVerbose("Using binary encoded bearer token")
+	err = ReadBinaryOrJSON(&tok, path)
-	} else {
+	ExitOnErr(cmd, "invalid bearer token: %v", err)
-		PrintVerbose("Using JSON encoded bearer token")
-	}
 
 	return &tok
 }
 
-// ReadSessionToken calls ReadSessionTokenErr and exists on error.
+// BinaryOrJSON is an interface of entities which provide json.Unmarshaler
-func ReadSessionToken(cmd *cobra.Command, dst json.Unmarshaler, fPath string) {
+// and NeoFS binary decoder.
-	ExitOnErr(cmd, "", ReadSessionTokenErr(dst, fPath))
+type BinaryOrJSON interface {
+	Unmarshal([]byte) error
+	json.Unmarshaler
 }
 
-// ReadSessionTokenErr reads session token as JSON file with session token
+// ReadBinaryOrJSON reads file data using provided path and decodes
-// from path provided in a specified flag.
+// BinaryOrJSON from the data.
-func ReadSessionTokenErr(dst json.Unmarshaler, fPath string) error {
+func ReadBinaryOrJSON(dst BinaryOrJSON, fPath string) error {
+	PrintVerbose("Reading file [%s]...", fPath)
+
 	// try to read session token from file
 	data, err := os.ReadFile(fPath)
 	if err != nil {
-		return fmt.Errorf("could not open file with session token <%s>: %w", fPath, err)
+		return fmt.Errorf("read file <%s>: %w", fPath, err)
 	}
 
+	PrintVerbose("Trying to decode binary...")
+
+	err = dst.Unmarshal(data)
+	if err != nil {
+		PrintVerbose("Failed to decode binary: %v", err)
+
+		PrintVerbose("Trying to decode JSON...")
+
 		err = dst.UnmarshalJSON(data)
 		if err != nil {
-		return fmt.Errorf("could not unmarshal session token from file: %w", err)
+			PrintVerbose("Failed to decode JSON: %v", err)
+			return errors.New("invalid format")
+		}
 	}
 
 	return nil

cmd/neofs-cli/internal/commonflags/session.go

@@ -1,14 +1,19 @@
 package commonflags
 
-import "github.com/spf13/cobra"
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
 
 const SessionToken = "session"
 
-// InitSession initializes session parameter for cmd.
+// InitSession registers SessionToken flag representing filepath to the token
-func InitSession(cmd *cobra.Command) {
+// of the session with the given name. Supports NeoFS-binary and JSON files.
+func InitSession(cmd *cobra.Command, name string) {
 	cmd.Flags().String(
 		SessionToken,
 		"",
-		"Path to a JSON-encoded container session token",
+		fmt.Sprintf("Filepath to a JSON- or binary-encoded token of the %s session", name),
 	)
 }

cmd/neofs-cli/modules/container/create.go

@@ -14,7 +14,6 @@ import (
 	"github.com/nspcc-dev/neofs-sdk-go/container"
 	"github.com/nspcc-dev/neofs-sdk-go/container/acl"
 	"github.com/nspcc-dev/neofs-sdk-go/netmap"
-	"github.com/nspcc-dev/neofs-sdk-go/session"
 	subnetid "github.com/nspcc-dev/neofs-sdk-go/subnet/id"
 	"github.com/nspcc-dev/neofs-sdk-go/user"
 	"github.com/spf13/cobra"
@@ -74,13 +73,9 @@ It will be stored in sidechain when inner ring will accepts it.`,
 		var basicACL acl.Basic
 		common.ExitOnErr(cmd, "decode basic ACL string: %w", basicACL.DecodeString(containerACL))
 
-		var tok *session.Container
+		tok := getSession(cmd)
-
-		sessionTokenPath, _ := cmd.Flags().GetString(commonflags.SessionToken)
-		if sessionTokenPath != "" {
-			tok = new(session.Container)
-			common.ReadSessionToken(cmd, tok, sessionTokenPath)
 
+		if tok != nil {
 			issuer := tok.Issuer()
 			cnr.SetOwner(issuer)
 		} else {

cmd/neofs-cli/modules/container/delete.go

@@ -9,7 +9,6 @@ import (
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
 	objectSDK "github.com/nspcc-dev/neofs-sdk-go/object"
-	"github.com/nspcc-dev/neofs-sdk-go/session"
 	"github.com/spf13/cobra"
 )
 
@@ -21,13 +20,7 @@ Only owner of the container has a permission to remove container.`,
 	Run: func(cmd *cobra.Command, args []string) {
 		id := parseContainerID(cmd)
 
-		var tok *session.Container
+		tok := getSession(cmd)
-
-		sessionTokenPath, _ := cmd.Flags().GetString(commonflags.SessionToken)
-		if sessionTokenPath != "" {
-			tok = new(session.Container)
-			common.ReadSessionToken(cmd, tok, sessionTokenPath)
-		}
 
 		pk := key.Get(cmd)
 		cli := internalclient.GetSDKClientByFlag(cmd, pk, commonflags.RPC)

cmd/neofs-cli/modules/container/list_objects.go

@@ -9,7 +9,6 @@ import (
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
 	objectCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/object"
-	sessionCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/session"
 	"github.com/nspcc-dev/neofs-sdk-go/object"
 	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
 	"github.com/spf13/cobra"
@@ -35,16 +34,17 @@ var listContainerObjectsCmd = &cobra.Command{
 		filters := new(object.SearchFilters)
 		filters.AddRootFilter() // search only user created objects
 
-		pk := key.GetOrGenerate(cmd)
+		cli := internalclient.GetSDKClientByFlag(cmd, key.GetOrGenerate(cmd), commonflags.RPC)
 
 		var prmSearch internalclient.SearchObjectsPrm
 		var prmHead internalclient.HeadObjectPrm
 
+		prmSearch.SetClient(cli)
+
 		if flagVarListObjectsPrintAttr {
-			sessionCli.Prepare(cmd, id, nil, pk, &prmSearch, &prmHead)
+			prmHead.SetClient(cli)
 			objectCli.Prepare(cmd, &prmSearch, &prmHead)
 		} else {
-			sessionCli.Prepare(cmd, id, nil, pk, &prmSearch)
 			objectCli.Prepare(cmd, &prmSearch)
 		}
 

cmd/neofs-cli/modules/container/root.go

@@ -45,11 +45,14 @@ func init() {
 		commonflags.InitAPI(containerCommand)
 	}
 
-	for _, cmd := range []*cobra.Command{
+	for _, el := range []struct {
-		createContainerCmd,
+		cmd  *cobra.Command
-		deleteContainerCmd,
+		verb string
-		setExtendedACLCmd,
+	}{
+		{createContainerCmd, "PUT"},
+		{deleteContainerCmd, "DELETE"},
+		{setExtendedACLCmd, "SETEACL"},
 	} {
-		commonflags.InitSession(cmd)
+		commonflags.InitSession(el.cmd, "container "+el.verb)
 	}
 }

cmd/neofs-cli/modules/container/set_eacl.go

@@ -9,7 +9,6 @@ import (
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/common"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
-	"github.com/nspcc-dev/neofs-sdk-go/session"
 	"github.com/spf13/cobra"
 )
 
@@ -28,13 +27,7 @@ Container ID in EACL table will be substituted with ID from the CLI.`,
 		id := parseContainerID(cmd)
 		eaclTable := common.ReadEACL(cmd, flagVarsSetEACL.srcPath)
 
-		var tok *session.Container
+		tok := getSession(cmd)
-
-		sessionTokenPath, _ := cmd.Flags().GetString(commonflags.SessionToken)
-		if sessionTokenPath != "" {
-			tok = new(session.Container)
-			common.ReadSessionToken(cmd, tok, sessionTokenPath)
-		}
 
 		eaclTable.SetCID(id)
 

cmd/neofs-cli/modules/container/util.go

@@ -4,7 +4,9 @@ import (
 	"errors"
 
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/common"
+	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
 	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
+	"github.com/nspcc-dev/neofs-sdk-go/session"
 	"github.com/spf13/cobra"
 )
 
@@ -30,3 +32,26 @@ func parseContainerID(cmd *cobra.Command) cid.ID {
 	common.ExitOnErr(cmd, "can't decode container ID value: %w", err)
 	return id
 }
+
+// decodes session.Container from the file by path provided in
+// commonflags.SessionToken flag. Returns nil if the path is not specified.
+func getSession(cmd *cobra.Command) *session.Container {
+	common.PrintVerbose("Reading container session...")
+
+	path, _ := cmd.Flags().GetString(commonflags.SessionToken)
+	if path == "" {
+		common.PrintVerbose("Session not provided.")
+		return nil
+	}
+
+	common.PrintVerbose("Reading container session from the file [%s]...", path)
+
+	var res session.Container
+
+	err := common.ReadBinaryOrJSON(&res, path)
+	common.ExitOnErr(cmd, "read container session: %v", err)
+
+	common.PrintVerbose("Session successfully read.")
+
+	return &res
+}

cmd/neofs-cli/modules/object/delete.go

@@ -5,7 +5,6 @@ import (
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/common"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
-	sessionCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/session"
 	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
 	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
 	"github.com/spf13/cobra"
@@ -21,7 +20,7 @@ var objectDelCmd = &cobra.Command{
 
 func initObjectDeleteCmd() {
 	commonflags.Init(objectDelCmd)
-	commonflags.InitSession(objectDelCmd)
+	initFlagSession(objectDelCmd, "DELETE")
 
 	flags := objectDelCmd.Flags()
 
@@ -40,7 +39,7 @@ func deleteObject(cmd *cobra.Command, _ []string) {
 	pk := key.GetOrGenerate(cmd)
 
 	var prm internalclient.DeleteObjectPrm
-	sessionCli.Prepare(cmd, cnr, &obj, pk, &prm)
+	ReadOrOpenSession(cmd, &prm, pk, cnr, &obj)
 	Prepare(cmd, &prm)
 	prm.SetAddress(objAddr)
 

cmd/neofs-cli/modules/object/get.go

@@ -25,7 +25,7 @@ var objectGetCmd = &cobra.Command{
 
 func initObjectGetCmd() {
 	commonflags.Init(objectGetCmd)
-	commonflags.InitSession(objectGetCmd)
+	initFlagSession(objectGetCmd, "GET")
 
 	flags := objectGetCmd.Flags()
 

cmd/neofs-cli/modules/object/hash.go

@@ -9,7 +9,6 @@ import (
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/common"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
-	sessionCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/session"
 	"github.com/nspcc-dev/neofs-sdk-go/checksum"
 	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
 	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
@@ -69,7 +68,6 @@ func getObjectHash(cmd *cobra.Command, _ []string) {
 	fullHash := len(ranges) == 0
 	if fullHash {
 		var headPrm internalclient.HeadObjectPrm
-		sessionCli.Prepare(cmd, cnr, &obj, pk, &headPrm)
 		Prepare(cmd, &headPrm)
 		headPrm.SetAddress(objAddr)
 

cmd/neofs-cli/modules/object/head.go

@@ -27,7 +27,7 @@ var objectHeadCmd = &cobra.Command{
 
 func initObjectHeadCmd() {
 	commonflags.Init(objectHeadCmd)
-	commonflags.InitSession(objectHeadCmd)
+	initFlagSession(objectHeadCmd, "HEAD")
 
 	flags := objectHeadCmd.Flags()
 

cmd/neofs-cli/modules/object/lock.go

@@ -12,7 +12,6 @@ import (
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/common"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
-	sessionCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/session"
 	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
 	objectSDK "github.com/nspcc-dev/neofs-sdk-go/object"
 	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
@@ -79,8 +78,7 @@ var objectLockCmd = &cobra.Command{
 		obj.SetPayload(lock.Marshal())
 
 		var prm internalclient.PutObjectPrm
-
+		ReadOrOpenSession(cmd, &prm, key, cnr, nil)
-		sessionCli.Prepare(cmd, cnr, nil, key, &prm)
 		Prepare(cmd, &prm)
 		prm.SetHeader(obj)
 
@@ -94,7 +92,7 @@ var objectLockCmd = &cobra.Command{
 
 func initCommandObjectLock() {
 	commonflags.Init(objectLockCmd)
-	commonflags.InitSession(objectLockCmd)
+	initFlagSession(objectLockCmd, "PUT")
 
 	objectLockCmd.Flags().Uint64P(commonflags.ExpireAt, "e", 0, "Lock expiration epoch")
 	objectLockCmd.Flags().Uint64(commonflags.Lifetime, 0, "Lock lifetime")

cmd/neofs-cli/modules/object/put.go

@@ -14,7 +14,6 @@ import (
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/common"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
-	sessionCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/session"
 	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
 	"github.com/nspcc-dev/neofs-sdk-go/object"
 	"github.com/nspcc-dev/neofs-sdk-go/user"
@@ -37,7 +36,7 @@ var objectPutCmd = &cobra.Command{
 
 func initObjectPutCmd() {
 	commonflags.Init(objectPutCmd)
-	commonflags.InitSession(objectPutCmd)
+	initFlagSession(objectPutCmd, "PUT")
 
 	flags := objectPutCmd.Flags()
 
@@ -109,7 +108,7 @@ func putObject(cmd *cobra.Command, _ []string) {
 	}
 
 	var prm internalclient.PutObjectPrm
-	sessionCli.Prepare(cmd, cnr, nil, pk, &prm)
+	ReadOrOpenSession(cmd, &prm, pk, cnr, nil)
 	Prepare(cmd, &prm)
 	prm.SetHeader(obj)
 

cmd/neofs-cli/modules/object/range.go

@@ -28,7 +28,7 @@ var objectRangeCmd = &cobra.Command{
 
 func initObjectRangeCmd() {
 	commonflags.Init(objectRangeCmd)
-	commonflags.InitSession(objectRangeCmd)
+	initFlagSession(objectRangeCmd, "RANGE")
 
 	flags := objectRangeCmd.Flags()
 

cmd/neofs-cli/modules/object/search.go

@@ -30,7 +30,7 @@ var (
 
 func initObjectSearchCmd() {
 	commonflags.Init(objectSearchCmd)
-	commonflags.InitSession(objectSearchCmd)
+	initFlagSession(objectSearchCmd, "SEARCH")
 
 	flags := objectSearchCmd.Flags()
 

cmd/neofs-cli/modules/object/util.go

@@ -9,7 +9,9 @@ import (
 	internal "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/client"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/common"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
+	sessionCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/session"
 	"github.com/nspcc-dev/neofs-sdk-go/bearer"
+	"github.com/nspcc-dev/neofs-sdk-go/client"
 	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
 	neofsecdsa "github.com/nspcc-dev/neofs-sdk-go/crypto/ecdsa"
 	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
@@ -87,50 +89,67 @@ func readOID(cmd *cobra.Command, id *oid.ID) {
 	common.ExitOnErr(cmd, "decode object ID string: %w", err)
 }
 
-// common interface of object operation's input which supports sessions.
+// SessionPrm is a common interface of object operation's input which supports
-// Implemented on types like internal.PutObjectPrm.
+// sessions.
-type sessionPrm interface {
+type SessionPrm interface {
 	SetSessionToken(*session.Object)
+	SetClient(*client.Client)
 }
 
-// forwards all parameters to _readSession and object as nil.
+// forwards all parameters to _readVerifiedSession and object as nil.
-func readSessionGlobal(cmd *cobra.Command, dst sessionPrm, key *ecdsa.PrivateKey, cnr cid.ID) {
+func readSessionGlobal(cmd *cobra.Command, dst SessionPrm, key *ecdsa.PrivateKey, cnr cid.ID) {
-	_readSession(cmd, dst, key, cnr, nil)
+	_readVerifiedSession(cmd, dst, key, cnr, nil)
 }
 
-// forwards all parameters to _readSession.
+// forwards all parameters to _readVerifiedSession.
-func readSession(cmd *cobra.Command, dst sessionPrm, key *ecdsa.PrivateKey, cnr cid.ID, obj oid.ID) {
+func readSession(cmd *cobra.Command, dst SessionPrm, key *ecdsa.PrivateKey, cnr cid.ID, obj oid.ID) {
-	_readSession(cmd, dst, key, cnr, &obj)
+	_readVerifiedSession(cmd, dst, key, cnr, &obj)
 }
 
-// decodes object session from JSON file from "session" command flag if it is provided,
+// decodes session.Object from the file by path specified in the
-// and writes resulting session into the provided sessionPrm. Checks:
+// commonflags.SessionToken flag. Returns nil if flag is not set.
+func getSession(cmd *cobra.Command) *session.Object {
+	common.PrintVerbose("Trying to read session from the file...")
+
+	path, _ := cmd.Flags().GetString(commonflags.SessionToken)
+	if path == "" {
+		common.PrintVerbose("File with session token is not provided.")
+		return nil
+	}
+
+	common.PrintVerbose("Reading session from the file [%s]...", path)
+
+	var tok session.Object
+
+	err := common.ReadBinaryOrJSON(&tok, path)
+	common.ExitOnErr(cmd, "read session: %v", err)
+
+	return &tok
+}
+
+// decodes object session from JSON file from commonflags.SessionToken command
+// flag if it is provided, and writes resulting session into the provided SessionPrm.
+// Returns flag presence. Checks:
 //
-//   - if session verb corresponds to given sessionPrm according to its type
+//   - if session verb corresponds to given SessionPrm according to its type
 //   - relation to the given container
 //   - relation to the given object if non-nil
 //   - relation to the given private key used within the command
 //   - session signature
 //
-// sessionPrm MUST be one of:
+// SessionPrm MUST be one of:
 //
-//	*internal.PutObjectPrm
-//	*internal.DeleteObjectPrm
 //	*internal.GetObjectPrm
 //	*internal.HeadObjectPrm
 //	*internal.SearchObjectsPrm
 //	*internal.PayloadRangePrm
 //	*internal.HashPayloadRangesPrm
-func _readSession(cmd *cobra.Command, dst sessionPrm, key *ecdsa.PrivateKey, cnr cid.ID, obj *oid.ID) {
+func _readVerifiedSession(cmd *cobra.Command, dst SessionPrm, key *ecdsa.PrivateKey, cnr cid.ID, obj *oid.ID) {
 	var cmdVerb session.ObjectVerb
 
 	switch dst.(type) {
 	default:
 		panic(fmt.Sprintf("unsupported op parameters %T", dst))
-	case *internal.PutObjectPrm:
-		cmdVerb = session.VerbObjectPut
-	case *internal.DeleteObjectPrm:
-		cmdVerb = session.VerbObjectDelete
 	case *internal.GetObjectPrm:
 		cmdVerb = session.VerbObjectGet
 	case *internal.HeadObjectPrm:
@@ -143,12 +162,10 @@ func _readSession(cmd *cobra.Command, dst sessionPrm, key *ecdsa.PrivateKey, cnr
 		cmdVerb = session.VerbObjectRangeHash
 	}
 
-	sessionTokenPath, _ := cmd.Flags().GetString(commonflags.SessionToken)
+	tok := getSession(cmd)
-	if sessionTokenPath != "" {
+	if tok == nil {
-		common.PrintVerbose("Reading object session from the JSON file [%s]...", sessionTokenPath)
+		return
-
+	}
-		var tok session.Object
-		common.ReadSessionToken(cmd, &tok, sessionTokenPath)
 
 	common.PrintVerbose("Checking session correctness...")
 
@@ -167,8 +184,103 @@ func _readSession(cmd *cobra.Command, dst sessionPrm, key *ecdsa.PrivateKey, cnr
 
 	common.PrintVerbose("Session is correct.")
 
-		dst.SetSessionToken(&tok)
+	dst.SetSessionToken(tok)
-	} else {
+}
-		common.PrintVerbose("Session is not provided.")
+
-	}
+// ReadOrOpenSession opens client connection and calls ReadOrOpenSessionViaClient with it.
+func ReadOrOpenSession(cmd *cobra.Command, dst SessionPrm, key *ecdsa.PrivateKey, cnr cid.ID, obj *oid.ID) {
+	cli := internal.GetSDKClientByFlag(cmd, key, commonflags.RPC)
+	ReadOrOpenSessionViaClient(cmd, dst, cli, key, cnr, obj)
+}
+
+// ReadOrOpenSessionViaClient tries to read session from the file specified in
+// commonflags.SessionToken flag, finalizes structures of the decoded token
+// and write the result into provided SessionPrm. If file is missing,
+// ReadOrOpenSessionViaClient calls OpenSessionViaClient.
+func ReadOrOpenSessionViaClient(cmd *cobra.Command, dst SessionPrm, cli *client.Client, key *ecdsa.PrivateKey, cnr cid.ID, obj *oid.ID) {
+	tok := getSession(cmd)
+	if tok == nil {
+		OpenSessionViaClient(cmd, dst, cli, key, cnr, obj)
+		return
+	}
+
+	finalizeSession(cmd, dst, tok, key, cnr, obj)
+	dst.SetClient(cli)
+}
+
+// OpenSession opens client connection and calls OpenSessionViaClient with it.
+func OpenSession(cmd *cobra.Command, dst SessionPrm, key *ecdsa.PrivateKey, cnr cid.ID, obj *oid.ID) {
+	cli := internal.GetSDKClientByFlag(cmd, key, commonflags.RPC)
+	OpenSessionViaClient(cmd, dst, cli, key, cnr, obj)
+}
+
+// OpenSessionViaClient opens object session with the remote node, finalizes
+// structure of the session token and writes the result into the provided
+// SessionPrm. Also writes provided client connection to the SessionPrm.
+//
+// SessionPrm MUST be one of:
+//
+//	*internal.PutObjectPrm
+//	*internal.DeleteObjectPrm
+func OpenSessionViaClient(cmd *cobra.Command, dst SessionPrm, cli *client.Client, key *ecdsa.PrivateKey, cnr cid.ID, obj *oid.ID) {
+	var tok session.Object
+
+	const sessionLifetime = 10 // in NeoFS epochs
+
+	common.PrintVerbose("Opening remote session with the node...")
+
+	err := sessionCli.CreateSession(&tok, cli, sessionLifetime)
+	common.ExitOnErr(cmd, "open remote session: %w", err)
+
+	common.PrintVerbose("Session successfully opened.")
+
+	finalizeSession(cmd, dst, &tok, key, cnr, obj)
+
+	dst.SetClient(cli)
+}
+
+// specifies session verb, binds the session to the given container and limits
+// the session by the given object (if specified). After all data is written,
+// signs session using provided private key and writes the session into the
+// given SessionPrm.
+//
+// SessionPrm MUST be one of:
+//
+//	*internal.PutObjectPrm
+//	*internal.DeleteObjectPrm
+func finalizeSession(cmd *cobra.Command, dst SessionPrm, tok *session.Object, key *ecdsa.PrivateKey, cnr cid.ID, obj *oid.ID) {
+	common.PrintVerbose("Finalizing session token...")
+
+	switch dst.(type) {
+	default:
+		panic(fmt.Sprintf("unsupported op parameters %T", dst))
+	case *internal.PutObjectPrm:
+		common.PrintVerbose("Binding session to object PUT...")
+		tok.ForVerb(session.VerbObjectPut)
+	case *internal.DeleteObjectPrm:
+		common.PrintVerbose("Binding session to object DELETE...")
+		tok.ForVerb(session.VerbObjectDelete)
+	}
+
+	common.PrintVerbose("Binding session to container %s...", cnr)
+
+	tok.BindContainer(cnr)
+	if obj != nil {
+		common.PrintVerbose("Limiting session by object %s...", obj)
+		tok.LimitByObjects(*obj)
+	}
+
+	common.PrintVerbose("Signing session...")
+
+	err := tok.Sign(*key)
+	common.ExitOnErr(cmd, "sign session: %w", err)
+
+	common.PrintVerbose("Session token successfully formed and attached to the request.")
+
+	dst.SetSessionToken(tok)
+}
+
+// calls commonflags.InitSession with "object <verb>" name.
+func initFlagSession(cmd *cobra.Command, verb string) {
+	commonflags.InitSession(cmd, "object "+verb)
 }

cmd/neofs-cli/modules/session/util.go

@@ -1,75 +0,0 @@
-package session
-
-import (
-	"crypto/ecdsa"
-	"os"
-
-	internalclient "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/client"
-	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/common"
-	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
-	"github.com/nspcc-dev/neofs-sdk-go/client"
-	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
-	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
-	"github.com/nspcc-dev/neofs-sdk-go/session"
-	"github.com/spf13/cobra"
-)
-
-// RPCParameters represents parameters for operations with session token.
-type RPCParameters interface {
-	SetClient(*client.Client)
-	SetSessionToken(*session.Object)
-}
-
-const sessionTokenLifetime = 10 // in epochs
-
-// Prepare prepares session for a command.
-func Prepare(cmd *cobra.Command, cnr cid.ID, obj *oid.ID, key *ecdsa.PrivateKey, prms ...RPCParameters) {
-	cli := internalclient.GetSDKClientByFlag(cmd, key, commonflags.RPC)
-
-	var tok session.Object
-	if tokenPath, _ := cmd.Flags().GetString(commonflags.SessionToken); len(tokenPath) != 0 {
-		data, err := os.ReadFile(tokenPath)
-		common.ExitOnErr(cmd, "can't read session token: %w", err)
-
-		if err := tok.Unmarshal(data); err != nil {
-			err = tok.UnmarshalJSON(data)
-			common.ExitOnErr(cmd, "can't unmarshal session token: %w", err)
-		}
-	} else {
-		err := CreateSession(&tok, cli, sessionTokenLifetime)
-		common.ExitOnErr(cmd, "create session: %w", err)
-	}
-
-	for i := range prms {
-		tok := tok
-		switch prms[i].(type) {
-		case *internalclient.GetObjectPrm:
-			tok.ForVerb(session.VerbObjectGet)
-		case *internalclient.HeadObjectPrm:
-			tok.ForVerb(session.VerbObjectHead)
-		case *internalclient.PutObjectPrm:
-			tok.ForVerb(session.VerbObjectPut)
-		case *internalclient.DeleteObjectPrm:
-			tok.ForVerb(session.VerbObjectDelete)
-		case *internalclient.SearchObjectsPrm:
-			tok.ForVerb(session.VerbObjectSearch)
-		case *internalclient.PayloadRangePrm:
-			tok.ForVerb(session.VerbObjectRange)
-		case *internalclient.HashPayloadRangesPrm:
-			tok.ForVerb(session.VerbObjectRangeHash)
-		default:
-			panic("invalid client parameter type")
-		}
-
-		tok.BindContainer(cnr)
-		if obj != nil {
-			tok.LimitByObjects(*obj)
-		}
-
-		err := tok.Sign(*key)
-		common.ExitOnErr(cmd, "session token signing: %w", err)
-
-		prms[i].SetClient(cli)
-		prms[i].SetSessionToken(&tok)
-	}
-}

cmd/neofs-cli/modules/storagegroup/delete.go

@@ -6,7 +6,6 @@ import (
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
 	objectCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/object"
-	sessionCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/session"
 	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
 	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
 	"github.com/spf13/cobra"
@@ -40,7 +39,7 @@ func delSG(cmd *cobra.Command, _ []string) {
 	addr := readObjectAddress(cmd, &cnr, &obj)
 
 	var prm internalclient.DeleteObjectPrm
-	sessionCli.Prepare(cmd, cnr, &obj, pk, &prm)
+	objectCli.OpenSession(cmd, &prm, pk, cnr, &obj)
 	objectCli.Prepare(cmd, &prm)
 	prm.SetAddress(addr)
 

cmd/neofs-cli/modules/storagegroup/get.go

@@ -8,7 +8,6 @@ import (
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
 	objectCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/object"
-	sessionCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/session"
 	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
 	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
 	storagegroupSDK "github.com/nspcc-dev/neofs-sdk-go/storagegroup"
@@ -46,9 +45,11 @@ func getSG(cmd *cobra.Command, _ []string) {
 	pk := key.GetOrGenerate(cmd)
 	buf := bytes.NewBuffer(nil)
 
+	cli := internalclient.GetSDKClientByFlag(cmd, pk, commonflags.RPC)
+
 	var prm internalclient.GetObjectPrm
-	sessionCli.Prepare(cmd, cnr, &obj, pk, &prm)
 	objectCli.Prepare(cmd, &prm)
+	prm.SetClient(cli)
 
 	raw, _ := cmd.Flags().GetBool(sgRawFlag)
 	prm.SetRawFlag(raw)

cmd/neofs-cli/modules/storagegroup/list.go

@@ -6,7 +6,6 @@ import (
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
 	objectCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/object"
-	sessionCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/session"
 	"github.com/nspcc-dev/neofs-node/pkg/services/object_manager/storagegroup"
 	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
 	"github.com/spf13/cobra"
@@ -32,9 +31,11 @@ func listSG(cmd *cobra.Command, _ []string) {
 
 	pk := key.GetOrGenerate(cmd)
 
+	cli := internalclient.GetSDKClientByFlag(cmd, pk, commonflags.RPC)
+
 	var prm internalclient.SearchObjectsPrm
-	sessionCli.Prepare(cmd, cnr, nil, pk, &prm)
 	objectCli.Prepare(cmd, &prm)
+	prm.SetClient(cli)
 	prm.SetContainerID(cnr)
 	prm.SetFilters(storagegroup.SearchQuery())
 

cmd/neofs-cli/modules/storagegroup/put.go

@@ -10,7 +10,6 @@ import (
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
 	objectCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/object"
-	sessionCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/session"
 	"github.com/nspcc-dev/neofs-node/pkg/services/object_manager/storagegroup"
 	"github.com/nspcc-dev/neofs-sdk-go/container"
 	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
@@ -83,10 +82,11 @@ func putSG(cmd *cobra.Command, _ []string) {
 	resGetCnr, err := internalclient.GetContainer(getCnrPrm)
 	common.ExitOnErr(cmd, "get container RPC call: %w", err)
 
-	sessionCli.Prepare(cmd, cnr, nil, pk, &putPrm)
+	objectCli.OpenSessionViaClient(cmd, &putPrm, cli, pk, cnr, nil)
 	objectCli.Prepare(cmd, &headPrm, &putPrm)
 
 	headPrm.SetRawFlag(true)
+	headPrm.SetClient(cli)
 
 	sg, err := storagegroup.CollectMembers(sgHeadReceiver{
 		cmd:     cmd,
@@ -128,9 +128,6 @@ type sgHeadReceiver struct {
 }
 
 func (c sgHeadReceiver) Head(addr oid.Address) (interface{}, error) {
-	obj := addr.Object()
-
-	sessionCli.Prepare(c.cmd, addr.Container(), &obj, c.key, &c.prm)
 	c.prm.SetAddress(addr)
 
 	res, err := internalclient.HeadObject(c.prm)

cmd/neofs-cli/modules/util/sign_session.go

@@ -42,7 +42,7 @@ func signSessionToken(cmd *cobra.Command, _ []string) {
 
 	type iTokenSession interface {
 		json.Marshaler
-		json.Unmarshaler
+		common.BinaryOrJSON
 		Sign(ecdsa.PrivateKey) error
 	}
 	var errLast error
@@ -52,14 +52,14 @@ func signSessionToken(cmd *cobra.Command, _ []string) {
 		new(session.Object),
 		new(session.Container),
 	} {
-		errLast = common.ReadSessionTokenErr(el, fPath)
+		errLast = common.ReadBinaryOrJSON(el, fPath)
 		if errLast == nil {
 			stok = el
 			break
 		}
 	}
 
-	common.ExitOnErr(cmd, "", errLast)
+	common.ExitOnErr(cmd, "decode session: %v", errLast)
 
 	pk := key.GetOrGenerate(cmd)