package authmate import ( "context" "crypto/ecdsa" "encoding/hex" "encoding/json" "fmt" "io" "os" "time" "github.com/google/uuid" "github.com/nspcc-dev/neo-go/pkg/crypto/keys" "github.com/nspcc-dev/neofs-s3-gw/api/cache" "github.com/nspcc-dev/neofs-s3-gw/creds/accessbox" "github.com/nspcc-dev/neofs-s3-gw/creds/tokens" cid "github.com/nspcc-dev/neofs-sdk-go/container/id" "github.com/nspcc-dev/neofs-sdk-go/eacl" "github.com/nspcc-dev/neofs-sdk-go/netmap" "github.com/nspcc-dev/neofs-sdk-go/object/address" "github.com/nspcc-dev/neofs-sdk-go/owner" "github.com/nspcc-dev/neofs-sdk-go/policy" "github.com/nspcc-dev/neofs-sdk-go/session" "github.com/nspcc-dev/neofs-sdk-go/token" "go.uber.org/zap" ) // PrmContainerCreate groups parameters of containers created by authmate. type PrmContainerCreate struct { // NeoFS identifier of the container creator. Owner owner.ID // Container placement policy. Policy netmap.PlacementPolicy // Friendly name for the container (optional). FriendlyName string } // NetworkState represents NeoFS network state which is needed for authmate processing. type NetworkState struct { // Current NeoFS time. Epoch uint64 // Duration of the Morph chain block in ms. BlockDuration int64 // Duration of the NeoFS epoch in Morph chain blocks. EpochDuration uint64 } // NeoFS represents virtual connection to NeoFS network. type NeoFS interface { // NeoFS interface required by credential tool. tokens.NeoFS // ContainerExists checks container presence in NeoFS by identifier. // Returns nil if container exists. ContainerExists(context.Context, cid.ID) error // CreateContainer creates and saves parameterized container in NeoFS. // It sets 'Timestamp' attribute to the current time. // It returns the ID of the saved container. // // The container must be private with GET access for OTHERS group. // Creation time should also be stamped. // // It returns exactly one non-nil value. It returns any error encountered which // prevented the container from being created. CreateContainer(context.Context, PrmContainerCreate) (*cid.ID, error) // TimeToEpoch computes the current epoch and the epoch that corresponds to the provided time. // Note: // * time must be in the future // * time will be ceil rounded to match epoch // // It returns any error encountered which prevented computing epochs. TimeToEpoch(context.Context, time.Time) (uint64, uint64, error) } // Agent contains client communicating with NeoFS and logger. type Agent struct { neoFS NeoFS log *zap.Logger } // New creates an object of type Agent that consists of Client and logger. func New(log *zap.Logger, neoFS NeoFS) *Agent { return &Agent{log: log, neoFS: neoFS} } type ( // ContainerPolicies contains mapping of aws LocationConstraint to neofs PlacementPolicy. ContainerPolicies map[string]string // IssueSecretOptions contains options for passing to Agent.IssueSecret method. IssueSecretOptions struct { Container ContainerOptions NeoFSKey *keys.PrivateKey GatesPublicKeys []*keys.PublicKey EACLRules []byte SessionTokenRules []byte SkipSessionRules bool Lifetime time.Duration AwsCliCredentialsFile string ContainerPolicies ContainerPolicies } // ContainerOptions groups parameters of auth container to put the secret into. ContainerOptions struct { ID *cid.ID FriendlyName string PlacementPolicy string } // ObtainSecretOptions contains options for passing to Agent.ObtainSecret method. ObtainSecretOptions struct { SecretAddress string GatePrivateKey *keys.PrivateKey } ) // lifetimeOptions holds NeoFS epochs, iat -- epoch which the token was issued at, exp -- epoch when the token expires. type lifetimeOptions struct { Iat uint64 Exp uint64 } type ( issuingResult struct { AccessKeyID string `json:"access_key_id"` SecretAccessKey string `json:"secret_access_key"` OwnerPrivateKey string `json:"owner_private_key"` ContainerID string `json:"container_id"` } obtainingResult struct { BearerToken *token.BearerToken `json:"-"` SecretAccessKey string `json:"secret_access_key"` } ) func (a *Agent) checkContainer(ctx context.Context, opts ContainerOptions, idOwner *owner.ID) (*cid.ID, error) { if opts.ID != nil { // check that the container exists return opts.ID, a.neoFS.ContainerExists(ctx, *opts.ID) } pp, err := policy.Parse(opts.PlacementPolicy) if err != nil { return nil, fmt.Errorf("failed to build placement policy: %w", err) } cnrID, err := a.neoFS.CreateContainer(ctx, PrmContainerCreate{ Owner: *idOwner, Policy: *pp, FriendlyName: opts.FriendlyName, }) if err != nil { return nil, err } return cnrID, nil } func checkPolicy(policyString string) (*netmap.PlacementPolicy, error) { result, err := policy.Parse(policyString) if err == nil { return result, nil } result = netmap.NewPlacementPolicy() if err = result.UnmarshalJSON([]byte(policyString)); err == nil { return result, nil } return nil, fmt.Errorf("can't parse placement policy") } func preparePolicy(policy ContainerPolicies) ([]*accessbox.AccessBox_ContainerPolicy, error) { if policy == nil { return nil, nil } var result []*accessbox.AccessBox_ContainerPolicy for locationConstraint, placementPolicy := range policy { parsedPolicy, err := checkPolicy(placementPolicy) if err != nil { return nil, err } marshaled, err := parsedPolicy.Marshal() if err != nil { return nil, fmt.Errorf("can't marshal placement policy: %w", err) } result = append(result, &accessbox.AccessBox_ContainerPolicy{ LocationConstraint: locationConstraint, Policy: marshaled, }) } return result, nil } // IssueSecret creates an auth token, puts it in the NeoFS network and writes to io.Writer a new secret access key. func (a *Agent) IssueSecret(ctx context.Context, w io.Writer, options *IssueSecretOptions) error { var ( err error id *cid.ID box *accessbox.AccessBox lifetime lifetimeOptions ) policies, err := preparePolicy(options.ContainerPolicies) if err != nil { return err } lifetime.Iat, lifetime.Exp, err = a.neoFS.TimeToEpoch(ctx, time.Now().Add(options.Lifetime)) if err != nil { return err } gatesData, err := createTokens(options, lifetime) if err != nil { return err } box, secrets, err := accessbox.PackTokens(gatesData) if err != nil { return err } box.ContainerPolicy = policies idOwner := owner.NewIDFromPublicKey(&options.NeoFSKey.PrivateKey.PublicKey) a.log.Info("check container or create", zap.Stringer("cid", options.Container.ID), zap.String("friendly_name", options.Container.FriendlyName), zap.String("placement_policy", options.Container.PlacementPolicy)) if id, err = a.checkContainer(ctx, options.Container, idOwner); err != nil { return err } a.log.Info("store bearer token into NeoFS", zap.Stringer("owner_tkn", idOwner)) addr, err := tokens. New(a.neoFS, secrets.EphemeralKey, cache.DefaultAccessBoxConfig()). Put(ctx, id, idOwner, box, lifetime.Exp, options.GatesPublicKeys...) if err != nil { return fmt.Errorf("failed to put bearer token: %w", err) } accessKeyID := addr.ContainerID().String() + "0" + addr.ObjectID().String() ir := &issuingResult{ AccessKeyID: accessKeyID, SecretAccessKey: secrets.AccessKey, OwnerPrivateKey: hex.EncodeToString(secrets.EphemeralKey.Bytes()), ContainerID: id.String(), } enc := json.NewEncoder(w) enc.SetIndent("", " ") if err = enc.Encode(ir); err != nil { return err } if options.AwsCliCredentialsFile != "" { profileName := "authmate_cred_" + addr.ObjectID().String() if _, err = os.Stat(options.AwsCliCredentialsFile); os.IsNotExist(err) { profileName = "default" } file, err := os.OpenFile(options.AwsCliCredentialsFile, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600) if err != nil { return fmt.Errorf("couldn't open aws cli credentials file: %w", err) } defer file.Close() if _, err = file.WriteString(fmt.Sprintf("\n[%s]\naws_access_key_id = %s\naws_secret_access_key = %s\n", profileName, accessKeyID, secrets.AccessKey)); err != nil { return err } } return nil } // 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 := tokens.New(a.neoFS, options.GatePrivateKey, cache.DefaultAccessBoxConfig()) addr := address.NewAddress() if err := addr.Parse(options.SecretAddress); err != nil { return fmt.Errorf("failed to parse secret address: %w", err) } box, err := bearerCreds.GetBox(ctx, addr) if err != nil { return fmt.Errorf("failed to get tokens: %w", err) } or := &obtainingResult{ BearerToken: box.Gate.BearerToken, SecretAccessKey: box.Gate.AccessKey, } enc := json.NewEncoder(w) enc.SetIndent("", " ") return enc.Encode(or) } func buildEACLTable(eaclTable []byte) (*eacl.Table, error) { table := eacl.NewTable() if len(eaclTable) != 0 { return table, table.UnmarshalJSON(eaclTable) } record := eacl.NewRecord() record.SetOperation(eacl.OperationGet) record.SetAction(eacl.ActionAllow) // TODO: Change this later. // from := eacl.HeaderFromObject // matcher := eacl.MatchStringEqual // record.AddFilter(from eacl.FilterHeaderType, matcher eacl.Match, name string, value string) eacl.AddFormedTarget(record, eacl.RoleOthers) table.AddRecord(record) return table, nil } func buildContext(rules []byte) ([]*session.ContainerContext, error) { var sessionCtxs []*session.ContainerContext if len(rules) != 0 { // cast ToV2 temporary, because there is no method for unmarshalling in ContainerContext in api-go err := json.Unmarshal(rules, &sessionCtxs) if err != nil { return nil, fmt.Errorf("failed to unmarshal rules for session token: %w", err) } var ( containsPut = false containsSetEACL = false ) for _, s := range sessionCtxs { if s.IsForPut() { containsPut = true } else if s.IsForSetEACL() { containsSetEACL = true } } if containsPut && !containsSetEACL { ectx := session.NewContainerContext() ectx.ForSetEACL() sessionCtxs = append(sessionCtxs, ectx) } return sessionCtxs, nil } sessionCtxPut := session.NewContainerContext() sessionCtxPut.ForPut() sessionCtxDelete := session.NewContainerContext() sessionCtxDelete.ForDelete() sessionCtxEACL := session.NewContainerContext() sessionCtxEACL.ForSetEACL() return []*session.ContainerContext{sessionCtxPut, sessionCtxDelete, sessionCtxEACL}, nil } func buildBearerToken(key *keys.PrivateKey, table *eacl.Table, lifetime lifetimeOptions, gateKey *keys.PublicKey) (*token.BearerToken, error) { oid := owner.NewIDFromPublicKey((*ecdsa.PublicKey)(gateKey)) bearerToken := token.NewBearerToken() bearerToken.SetEACLTable(table) bearerToken.SetOwner(oid) bearerToken.SetLifetime(lifetime.Exp, lifetime.Iat, lifetime.Iat) return bearerToken, bearerToken.SignToken(&key.PrivateKey) } func buildBearerTokens(key *keys.PrivateKey, table *eacl.Table, lifetime lifetimeOptions, gatesKeys []*keys.PublicKey) ([]*token.BearerToken, error) { bearerTokens := make([]*token.BearerToken, 0, len(gatesKeys)) for _, gateKey := range gatesKeys { tkn, err := buildBearerToken(key, table, lifetime, gateKey) if err != nil { return nil, err } bearerTokens = append(bearerTokens, tkn) } return bearerTokens, nil } func buildSessionToken(key *keys.PrivateKey, oid *owner.ID, lifetime lifetimeOptions, ctx *session.ContainerContext, gateKey *keys.PublicKey) (*session.Token, error) { tok := session.NewToken() tok.SetContext(ctx) uid, err := uuid.New().MarshalBinary() if err != nil { return nil, err } tok.SetID(uid) tok.SetOwnerID(oid) tok.SetSessionKey(gateKey.Bytes()) tok.SetIat(lifetime.Iat) tok.SetNbf(lifetime.Iat) tok.SetExp(lifetime.Exp) return tok, tok.Sign(&key.PrivateKey) } func buildSessionTokens(key *keys.PrivateKey, oid *owner.ID, lifetime lifetimeOptions, ctxs []*session.ContainerContext, gatesKeys []*keys.PublicKey) ([][]*session.Token, error) { sessionTokens := make([][]*session.Token, 0, len(gatesKeys)) for _, gateKey := range gatesKeys { tkns := make([]*session.Token, len(ctxs)) for i, ctx := range ctxs { tkn, err := buildSessionToken(key, oid, lifetime, ctx, gateKey) if err != nil { return nil, err } tkns[i] = tkn } sessionTokens = append(sessionTokens, tkns) } return sessionTokens, nil } func createTokens(options *IssueSecretOptions, lifetime lifetimeOptions) ([]*accessbox.GateData, error) { gates := make([]*accessbox.GateData, len(options.GatesPublicKeys)) table, err := buildEACLTable(options.EACLRules) if err != nil { return nil, fmt.Errorf("failed to build eacl table: %w", err) } bearerTokens, err := buildBearerTokens(options.NeoFSKey, table, lifetime, options.GatesPublicKeys) if err != nil { return nil, fmt.Errorf("failed to build bearer tokens: %w", err) } for i, gateKey := range options.GatesPublicKeys { gates[i] = accessbox.NewGateData(gateKey, bearerTokens[i]) } if !options.SkipSessionRules { sessionRules, err := buildContext(options.SessionTokenRules) if err != nil { return nil, fmt.Errorf("failed to build context for session token: %w", err) } oid := owner.NewIDFromPublicKey(&options.NeoFSKey.PrivateKey.PublicKey) sessionTokens, err := buildSessionTokens(options.NeoFSKey, oid, lifetime, sessionRules, options.GatesPublicKeys) if err != nil { return nil, fmt.Errorf("failed to biuild session token: %w", err) } for i, sessionTkns := range sessionTokens { gates[i].SessionTokens = sessionTkns } } return gates, nil }