[#25] Migrate auth package to NeoFS API v2

- upgrade to NeoFS API v2
- upgrade to new Authmate package

closes #25

Signed-off-by: Evgeniy Kulikov <kim@nspcc.ru>

auth/bearer-token.go

@@ -3,7 +3,7 @@ package auth
 import (
 	"context"
 
-	"github.com/nspcc-dev/neofs-api-go/service"
+	"github.com/nspcc-dev/neofs-api-go/pkg/token"
 	"github.com/pkg/errors"
 )
 
@@ -12,12 +12,12 @@ type contextKey string
 const bearerTokenContextKey contextKey = "bearer-token"
 
 // GetBearerToken returns a bearer token embedded into a context or error, if any.
-func GetBearerToken(ctx context.Context) (*service.BearerTokenMsg, error) {
+func GetBearerToken(ctx context.Context) (*token.BearerToken, error) {
 	bt := ctx.Value(bearerTokenContextKey)
 	if bt == nil {
 		return nil, errors.New("got nil bearer token")
 	}
-	v, ok := bt.(*service.BearerTokenMsg)
+	v, ok := bt.(*token.BearerToken)
 	if !ok {
 		return nil, errors.Errorf("extracted unexpected type other than bearer token's: %T", v)
 	}
@@ -25,6 +25,6 @@ func GetBearerToken(ctx context.Context) (*service.BearerTokenMsg, error) {
 }
 
 // SetBearerToken return a context with embedded bearer token.
-func SetBearerToken(ctx context.Context, bearerToken *service.BearerTokenMsg) context.Context {
+func SetBearerToken(ctx context.Context, bearerToken *token.BearerToken) context.Context {
 	return context.WithValue(ctx, bearerTokenContextKey, bearerToken)
 }

auth/center.go

@@ -11,71 +11,56 @@ import (
 	"strings"
 	"time"
 
-	aws_credentials "github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/credentials"
 	v4 "github.com/aws/aws-sdk-go/aws/signer/v4"
-	"github.com/nspcc-dev/neofs-api-go/refs"
-	"github.com/nspcc-dev/neofs-api-go/service"
+	"github.com/nspcc-dev/neofs-api-go/pkg/token"
 	"github.com/nspcc-dev/neofs-authmate/accessbox/hcs"
-	"github.com/nspcc-dev/neofs-authmate/credentials"
-	"github.com/nspcc-dev/neofs-authmate/gates"
-	manager "github.com/nspcc-dev/neofs-authmate/neofsmanager"
+	"github.com/nspcc-dev/neofs-authmate/agents/s3"
+	manager "github.com/nspcc-dev/neofs-authmate/manager/neofs"
 	"github.com/pkg/errors"
 	"go.uber.org/zap"
 )
 
 var authorizationFieldRegexp = regexp.MustCompile(`AWS4-HMAC-SHA256 Credential=(?P<access_key_id_cid>[^/]+)/(?P<access_key_id_oid>[^/]+)/(?P<date>[^/]+)/(?P<region>[^/]*)/(?P<service>[^/]+)/aws4_request,\s*SignedHeaders=(?P<signed_header_fields>.+),\s*Signature=(?P<v4_signature>.+)`)
 
-const emptyStringSHA256 = `e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855`
+type (
+	Center struct {
+		man *manager.Manager
+		reg *regexpSubmatcher
 
-// Center is a central app's authentication/authorization management unit.
-type Center struct {
-	log              *zap.Logger
-	submatcher       *regexpSubmatcher
-	neofsCredentials *credentials.Credentials
-	manager          *manager.Manager
-	authKeys         *hcs.X25519Keys
+		keys *hcs.X25519Keys
 	}
 
-// NewCenter creates an instance of AuthCenter.
-func NewCenter(log *zap.Logger, neofsNodeAddress string) (*Center, error) {
-	m, err := manager.NewManager(neofsNodeAddress)
+	Params struct {
+		Timeout time.Duration
+
+		Log *zap.Logger
+		Con manager.Connector
+
+		GAKey *hcs.X25519Keys
+		NFKey *ecdsa.PrivateKey
+	}
+)
+
+// New creates an instance of AuthCenter.
+func New(ctx context.Context, p *Params) (*Center, error) {
+	m, err := manager.New(ctx,
+		manager.WithKey(p.NFKey),
+		manager.WithLogger(p.Log),
+		manager.WithConnector(p.Con))
+
 	if err != nil {
 		return nil, err
 	}
 	return &Center{
-		log:        log,
-		submatcher: &regexpSubmatcher{re: authorizationFieldRegexp},
-		manager:    m,
+		man: m,
+		reg: &regexpSubmatcher{re: authorizationFieldRegexp},
+
+		keys: p.GAKey,
 	}, nil
 }
 
-func (center *Center) SetNeoFSKeys(key *ecdsa.PrivateKey) error {
-	creds, err := credentials.NewFromKey(key)
-	if err != nil {
-		return err
-	}
-	center.neofsCredentials = creds
-	return nil
-}
-
-func (center *Center) GetNeoFSPrivateKey() *ecdsa.PrivateKey {
-	return center.neofsCredentials.Key()
-}
-
-func (center *Center) GetOwnerID() refs.OwnerID {
-	return center.neofsCredentials.OwnerID()
-}
-
-func (center *Center) SetAuthKeys(key hcs.X25519PrivateKey) error {
-	keys, err := hcs.NewKeys(key)
-	if err != nil {
-		return err
-	}
-	center.authKeys = keys
-	return nil
-}
-
-func (center *Center) AuthenticationPassed(request *http.Request) (*service.BearerTokenMsg, error) {
+func (center *Center) AuthenticationPassed(request *http.Request) (*token.BearerToken, error) {
 	queryValues := request.URL.Query()
 	if queryValues.Get("X-Amz-Algorithm") == "AWS4-HMAC-SHA256" {
 		return nil, errors.New("pre-signed form of request is not supported")
@@ -84,7 +69,7 @@ func (center *Center) AuthenticationPassed(request *http.Request) (*service.Bear
 	if len(authHeaderField) != 1 {
 		return nil, errors.New("unsupported request: wrong length of Authorization header field")
 	}
-	sms1 := center.submatcher.getSubmatches(authHeaderField[0])
+	sms1 := center.reg.getSubmatches(authHeaderField[0])
 	if len(sms1) != 7 {
 		return nil, errors.New("bad Authorization header field")
 	}
@@ -97,7 +82,7 @@ func (center *Center) AuthenticationPassed(request *http.Request) (*service.Bear
 		return nil, errors.Wrap(err, "failed to parse x-amz-date header field")
 	}
 	accessKeyID := fmt.Sprintf("%s/%s", sms1["access_key_id_cid"], sms1["access_key_id_oid"])
-	bearerToken, secretAccessKey, err := center.fetchBearerToken(accessKeyID)
+	res, err := s3.NewAgent(center.man).ObtainSecret(request.Context(), center.keys, accessKeyID)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to fetch bearer token")
 	}
@@ -110,7 +95,7 @@ func (center *Center) AuthenticationPassed(request *http.Request) (*service.Bear
 			}
 		}
 	}
-	awsCreds := aws_credentials.NewStaticCredentials(accessKeyID, secretAccessKey, "")
+	awsCreds := credentials.NewStaticCredentials(accessKeyID, res.SecretAccessKey, "")
 	signer := v4.NewSigner(awsCreds)
 	body, err := readAndKeepBody(request)
 	if err != nil {
@@ -120,31 +105,11 @@ func (center *Center) AuthenticationPassed(request *http.Request) (*service.Bear
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to sign temporary HTTP request")
 	}
-	sms2 := center.submatcher.getSubmatches(otherRequest.Header.Get("Authorization"))
+	sms2 := center.reg.getSubmatches(otherRequest.Header.Get("Authorization"))
 	if sms1["v4_signature"] != sms2["v4_signature"] {
 		return nil, errors.Wrap(err, "failed to pass authentication procedure")
 	}
-	return bearerToken, nil
-}
-
-func (center *Center) fetchBearerToken(accessKeyID string) (*service.BearerTokenMsg, string, error) {
-	akid := new(refs.Address)
-	if err := akid.Parse(accessKeyID); err != nil {
-		return nil, "", errors.Wrap(err, "failed to parse access key id as refs.Address")
-	}
-	config := &gates.ObtainingConfig{
-		BaseConfig: gates.BaseConfig{
-			OperationalCredentials: center.neofsCredentials,
-			Manager:                center.manager,
-		},
-		GateKeys:      center.authKeys,
-		SecretAddress: akid,
-	}
-	res, err := gates.ObtainSecret(config)
-	if err != nil {
-		return nil, "", errors.Wrap(err, "failed to obtain secret")
-	}
-	return res.BearerToken, res.SecretAccessKey, nil
+	return res.BearerToken, nil
 }
 
 // TODO: Make this write into a smart buffer backed by a file on a fast drive.
@@ -160,7 +125,3 @@ func readAndKeepBody(request *http.Request) (*bytes.Reader, error) {
 	request.Body = ioutil.NopCloser(bytes.NewReader(payload))
 	return bytes.NewReader(payload), nil
 }
-
-func LoadGateAuthPrivateKey(path string) (hcs.X25519PrivateKey, error) {
-	return ioutil.ReadFile(path)
-}