package tree import ( "context" "crypto/ecdsa" "encoding/hex" "errors" "fmt" "net" "strings" "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/ape/converter" aperequest "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/ape/request" "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/ape/router" core "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/container" "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/netmap" "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/ape" "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer" apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status" cnrSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container" "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/acl" cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id" "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user" apechain "git.frostfs.info/TrueCloudLab/policy-engine/pkg/chain" "git.frostfs.info/TrueCloudLab/policy-engine/pkg/engine" commonschema "git.frostfs.info/TrueCloudLab/policy-engine/schema/common" nativeschema "git.frostfs.info/TrueCloudLab/policy-engine/schema/native" "github.com/nspcc-dev/neo-go/pkg/crypto/keys" "google.golang.org/grpc/peer" ) var ( errInvalidTargetType = errors.New("bearer token defines non-container target override") errBearerExpired = errors.New("bearer token has expired") errBearerInvalidSignature = errors.New("bearer token has invalid signature") errBearerInvalidContainerID = errors.New("bearer token was created for another container") errBearerNotSignedByOwner = errors.New("bearer token is not signed by the container owner") errBearerInvalidOwner = errors.New("bearer token owner differs from the request sender") ) func (s *Service) newAPERequest(ctx context.Context, namespace string, cid cid.ID, operation acl.Op, role acl.Role, publicKey *keys.PublicKey, ) (aperequest.Request, error) { schemaMethod, err := converter.SchemaMethodFromACLOperation(operation) if err != nil { return aperequest.Request{}, err } schemaRole, err := converter.SchemaRoleFromACLRole(role) if err != nil { return aperequest.Request{}, err } reqProps := map[string]string{ nativeschema.PropertyKeyActorPublicKey: hex.EncodeToString(publicKey.Bytes()), nativeschema.PropertyKeyActorRole: schemaRole, } reqProps, err = s.fillWithUserClaimTags(reqProps, publicKey) if err != nil { return aperequest.Request{}, err } if p, ok := peer.FromContext(ctx); ok { if tcpAddr, ok := p.Addr.(*net.TCPAddr); ok { reqProps[commonschema.PropertyKeyFrostFSSourceIP] = tcpAddr.IP.String() } } var resourceName string if namespace == "root" || namespace == "" { resourceName = fmt.Sprintf(nativeschema.ResourceFormatRootContainerObjects, cid.EncodeToString()) } else { resourceName = fmt.Sprintf(nativeschema.ResourceFormatNamespaceContainerObjects, namespace, cid.EncodeToString()) } return aperequest.NewRequest( schemaMethod, aperequest.NewResource(resourceName, make(map[string]string)), reqProps, ), nil } // isValidBearer checks whether bearer token was correctly signed by authorized // entity. This method might be defined on whole ACL service because it will // require fetching current epoch to check lifetime. func isValidBearer(token *bearer.Token, ownerCnr user.ID, cntID cid.ID, publicKey *keys.PublicKey, st netmap.State) error { if token == nil { return nil } // 1. First check token lifetime. Simplest verification. if token.InvalidAt(st.CurrentEpoch()) { return errBearerExpired } // 2. Then check if bearer token is signed correctly. if !token.VerifySignature() { return errBearerInvalidSignature } // 3. Then check if container is either empty or equal to the container in the request. apeOverride := token.APEOverride() if apeOverride.Target.TargetType != ape.TargetTypeContainer { return errInvalidTargetType } var targetCnr cid.ID err := targetCnr.DecodeString(apeOverride.Target.Name) if err != nil { return fmt.Errorf("invalid cid format: %s", apeOverride.Target.Name) } if !cntID.Equals(targetCnr) { return errBearerInvalidContainerID } // 4. Then check if container owner signed this token. if !bearer.ResolveIssuer(*token).Equals(ownerCnr) { return errBearerNotSignedByOwner } // 5. Then check if request sender has rights to use this token. var usrSender user.ID user.IDFromKey(&usrSender, (ecdsa.PublicKey)(*publicKey)) if !token.AssertUser(usrSender) { return errBearerInvalidOwner } return nil } func (s *Service) checkAPE(ctx context.Context, bt *bearer.Token, container *core.Container, cid cid.ID, operation acl.Op, role acl.Role, publicKey *keys.PublicKey, ) error { namespace := "" cntNamespace, hasNamespace := strings.CutSuffix(cnrSDK.ReadDomain(container.Value).Zone(), ".ns") if hasNamespace { namespace = cntNamespace } request, err := s.newAPERequest(ctx, namespace, cid, operation, role, publicKey) if err != nil { return apeErr(err) } if bt != nil && !bt.Impersonate() { if err := isValidBearer(bt, container.Value.Owner(), cid, publicKey, s.state); err != nil { return fmt.Errorf("bearer validation error: %w", err) } btRouter, err := router.SingleUseRouterWithBearerTokenChains([]bearer.APEOverride{bt.APEOverride()}) if err != nil { return apeErr(err) } status, found, err := btRouter.IsAllowed(apechain.Ingress, engine.NewRequestTargetWithContainer(cid.EncodeToString()), request) if err != nil { return apeErr(err) } if found && status == apechain.Allow { return nil } if status != apechain.NoRuleFound { err = fmt.Errorf("access to operation %s is denied by access policy engine (bearer token): %s", request.Operation(), status.String()) return apeErr(err) } } rt := engine.NewRequestTargetExtended(namespace, cid.EncodeToString(), fmt.Sprintf("%s:%s", namespace, publicKey.Address()), nil) status, found, err := s.router.IsAllowed(apechain.Ingress, rt, request) if err != nil { return apeErr(err) } if found && status == apechain.Allow { return nil } err = fmt.Errorf("access to operation %s is denied by access policy engine: %s", request.Operation(), status.String()) return apeErr(err) } func apeErr(err error) error { errAccessDenied := &apistatus.ObjectAccessDenied{} errAccessDenied.WriteReason(err.Error()) return errAccessDenied } // fillWithUserClaimTags fills ape request properties with user claim tags getting them from frostfsid contract by actor public key. func (s *Service) fillWithUserClaimTags(reqProps map[string]string, publicKey *keys.PublicKey) (map[string]string, error) { if reqProps == nil { reqProps = make(map[string]string) } props, err := aperequest.FormFrostfsIDRequestProperties(s.frostfsidSubjectProvider, publicKey) if err != nil { return reqProps, err } for propertyName, properyValue := range props { reqProps[propertyName] = properyValue } return reqProps, nil }