504 lines
14 KiB
Go
504 lines
14 KiB
Go
package authmate
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import (
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"context"
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"crypto/ecdsa"
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"encoding/binary"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"io"
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"math"
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"os"
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"strconv"
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"time"
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"github.com/google/uuid"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neofs-s3-gw/api/cache"
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"github.com/nspcc-dev/neofs-s3-gw/creds/accessbox"
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"github.com/nspcc-dev/neofs-s3-gw/creds/tokens"
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apistatus "github.com/nspcc-dev/neofs-sdk-go/client/status"
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"github.com/nspcc-dev/neofs-sdk-go/container"
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cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
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"github.com/nspcc-dev/neofs-sdk-go/eacl"
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"github.com/nspcc-dev/neofs-sdk-go/netmap"
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"github.com/nspcc-dev/neofs-sdk-go/object"
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"github.com/nspcc-dev/neofs-sdk-go/owner"
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"github.com/nspcc-dev/neofs-sdk-go/policy"
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"github.com/nspcc-dev/neofs-sdk-go/pool"
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"github.com/nspcc-dev/neofs-sdk-go/session"
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"github.com/nspcc-dev/neofs-sdk-go/token"
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"go.uber.org/zap"
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)
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const (
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defaultAuthContainerBasicACL uint32 = 0b00111100100011001000110011001110
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)
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// Agent contains client communicating with NeoFS and logger.
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type Agent struct {
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pool pool.Pool
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log *zap.Logger
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}
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// New creates an object of type Agent that consists of Client and logger.
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func New(log *zap.Logger, conns pool.Pool) *Agent {
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return &Agent{log: log, pool: conns}
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}
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type (
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// ContainerPolicies contains mapping of aws LocationConstraint to neofs PlacementPolicy.
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ContainerPolicies map[string]string
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// IssueSecretOptions contains options for passing to Agent.IssueSecret method.
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IssueSecretOptions struct {
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ContainerID *cid.ID
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ContainerFriendlyName string
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NeoFSKey *keys.PrivateKey
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GatesPublicKeys []*keys.PublicKey
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EACLRules []byte
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ContextRules []byte
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SessionTkn bool
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Lifetime time.Duration
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AwsCliCredentialsFile string
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ContainerPolicies ContainerPolicies
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}
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// ObtainSecretOptions contains options for passing to Agent.ObtainSecret method.
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ObtainSecretOptions struct {
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SecretAddress string
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GatePrivateKey *keys.PrivateKey
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}
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)
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// lifetimeOptions holds NeoFS epochs, iat -- epoch, which a token was issued at, exp -- epoch, when the token expires.
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type lifetimeOptions struct {
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Iat uint64
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Exp uint64
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}
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type epochDurations struct {
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currentEpoch uint64
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msPerBlock int64
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blocksInEpoch uint64
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}
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type (
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issuingResult struct {
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AccessKeyID string `json:"access_key_id"`
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SecretAccessKey string `json:"secret_access_key"`
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OwnerPrivateKey string `json:"owner_private_key"`
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ContainerID string `json:"container_id"`
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}
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obtainingResult struct {
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BearerToken *token.BearerToken `json:"-"`
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SecretAccessKey string `json:"secret_access_key"`
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}
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)
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func (a *Agent) checkContainer(ctx context.Context, cid *cid.ID, friendlyName string) (*cid.ID, error) {
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if cid != nil {
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// check that container exists
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_, err := a.pool.GetContainer(ctx, cid)
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return cid, err
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}
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pp, err := buildPlacementPolicy("")
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if err != nil {
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return nil, fmt.Errorf("failed to build placement policy: %w", err)
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}
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cnrOptions := []container.Option{
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container.WithPolicy(pp),
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container.WithCustomBasicACL(defaultAuthContainerBasicACL),
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container.WithAttribute(container.AttributeTimestamp, strconv.FormatInt(time.Now().Unix(), 10)),
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}
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if friendlyName != "" {
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cnrOptions = append(cnrOptions, container.WithAttribute(container.AttributeName, friendlyName))
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}
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cnr := container.New(cnrOptions...)
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if friendlyName != "" {
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container.SetNativeName(cnr, friendlyName)
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}
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cid, err = a.pool.PutContainer(ctx, cnr)
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if err != nil {
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return nil, err
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}
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if err := a.pool.WaitForContainerPresence(ctx, cid, pool.DefaultPollingParams()); err != nil {
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return nil, err
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}
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return cid, nil
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}
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func (a *Agent) getEpochDurations(ctx context.Context) (*epochDurations, error) {
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if conn, _, err := a.pool.Connection(); err != nil {
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return nil, err
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} else if networkInfoRes, err := conn.NetworkInfo(ctx); err != nil {
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return nil, err
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} else if err = apistatus.ErrFromStatus(networkInfoRes.Status()); err != nil {
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return nil, err
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} else {
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networkInfo := networkInfoRes.Info()
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res := &epochDurations{
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currentEpoch: networkInfo.CurrentEpoch(),
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msPerBlock: networkInfo.MsPerBlock(),
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}
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networkInfo.NetworkConfig().IterateParameters(func(parameter *netmap.NetworkParameter) bool {
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if string(parameter.Key()) == "EpochDuration" {
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data := make([]byte, 8)
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copy(data, parameter.Value())
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res.blocksInEpoch = binary.LittleEndian.Uint64(data)
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return true
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}
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return false
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})
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if res.blocksInEpoch == 0 {
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return nil, fmt.Errorf("not found param: EpochDuration")
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}
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return res, nil
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}
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}
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func checkPolicy(policyString string) (*netmap.PlacementPolicy, error) {
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result, err := policy.Parse(policyString)
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if err == nil {
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return result, nil
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}
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result = netmap.NewPlacementPolicy()
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if err = result.UnmarshalJSON([]byte(policyString)); err == nil {
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return result, nil
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}
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return nil, fmt.Errorf("can't parse placement policy")
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}
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func preparePolicy(policy ContainerPolicies) ([]*accessbox.AccessBox_ContainerPolicy, error) {
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if policy == nil {
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return nil, nil
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}
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var result []*accessbox.AccessBox_ContainerPolicy
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for locationConstraint, placementPolicy := range policy {
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parsedPolicy, err := checkPolicy(placementPolicy)
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if err != nil {
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return nil, err
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}
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marshaled, err := parsedPolicy.Marshal()
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if err != nil {
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return nil, fmt.Errorf("can't marshal placement policy: %w", err)
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}
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result = append(result, &accessbox.AccessBox_ContainerPolicy{
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LocationConstraint: locationConstraint,
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Policy: marshaled,
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})
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}
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return result, nil
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}
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// IssueSecret creates an auth token, puts it in the NeoFS network and writes to io.Writer a new secret access key.
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func (a *Agent) IssueSecret(ctx context.Context, w io.Writer, options *IssueSecretOptions) error {
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var (
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err error
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cid *cid.ID
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box *accessbox.AccessBox
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lifetime lifetimeOptions
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)
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policies, err := preparePolicy(options.ContainerPolicies)
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if err != nil {
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return err
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}
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durations, err := a.getEpochDurations(ctx)
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if err != nil {
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return err
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}
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lifetime.Iat = durations.currentEpoch
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msPerEpoch := durations.blocksInEpoch * uint64(durations.msPerBlock)
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epochLifetime := uint64(options.Lifetime.Milliseconds()) / msPerEpoch
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if uint64(options.Lifetime.Milliseconds())%msPerEpoch != 0 {
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epochLifetime++
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}
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if epochLifetime >= math.MaxUint64-lifetime.Iat {
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lifetime.Exp = math.MaxUint64
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} else {
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lifetime.Exp = lifetime.Iat + epochLifetime
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}
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a.log.Info("check container", zap.Stringer("cid", options.ContainerID))
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if cid, err = a.checkContainer(ctx, options.ContainerID, options.ContainerFriendlyName); err != nil {
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return err
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}
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gatesData, err := createTokens(options, lifetime, cid)
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if err != nil {
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return fmt.Errorf("failed to build bearer token: %w", err)
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}
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box, secrets, err := accessbox.PackTokens(gatesData)
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if err != nil {
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return err
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}
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box.ContainerPolicy = policies
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oid, err := OwnerIDFromNeoFSKey(options.NeoFSKey.PublicKey())
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if err != nil {
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return err
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}
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a.log.Info("store bearer token into NeoFS",
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zap.Stringer("owner_tkn", oid))
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if !options.SessionTkn && len(options.ContextRules) > 0 {
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_, err := w.Write([]byte("Warning: rules for session token were set but --create-session flag wasn't, " +
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"so session token was not created\n"))
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if err != nil {
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return err
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}
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}
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address, err := tokens.
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New(a.pool, secrets.EphemeralKey, cache.DefaultAccessBoxConfig()).
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Put(ctx, cid, oid, box, lifetime.Exp, options.GatesPublicKeys...)
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if err != nil {
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return fmt.Errorf("failed to put bearer token: %w", err)
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}
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accessKeyID := address.ContainerID().String() + "0" + address.ObjectID().String()
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ir := &issuingResult{
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AccessKeyID: accessKeyID,
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SecretAccessKey: secrets.AccessKey,
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OwnerPrivateKey: hex.EncodeToString(secrets.EphemeralKey.Bytes()),
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ContainerID: cid.String(),
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}
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enc := json.NewEncoder(w)
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enc.SetIndent("", " ")
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if err = enc.Encode(ir); err != nil {
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return err
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}
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if options.AwsCliCredentialsFile != "" {
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profileName := "authmate_cred_" + address.ObjectID().String()
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if _, err = os.Stat(options.AwsCliCredentialsFile); os.IsNotExist(err) {
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profileName = "default"
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}
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file, err := os.OpenFile(options.AwsCliCredentialsFile, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
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if err != nil {
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return fmt.Errorf("couldn't open aws cli credentials file: %w", err)
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}
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defer file.Close()
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if _, err = file.WriteString(fmt.Sprintf("\n[%s]\naws_access_key_id = %s\naws_secret_access_key = %s\n",
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profileName, accessKeyID, secrets.AccessKey)); err != nil {
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return err
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}
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}
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return nil
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}
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// ObtainSecret receives an existing secret access key from NeoFS and
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// writes to io.Writer the secret access key.
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func (a *Agent) ObtainSecret(ctx context.Context, w io.Writer, options *ObtainSecretOptions) error {
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bearerCreds := tokens.New(a.pool, options.GatePrivateKey, cache.DefaultAccessBoxConfig())
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address := object.NewAddress()
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if err := address.Parse(options.SecretAddress); err != nil {
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return fmt.Errorf("failed to parse secret address: %w", err)
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}
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box, err := bearerCreds.GetBox(ctx, address)
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if err != nil {
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return fmt.Errorf("failed to get tokens: %w", err)
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}
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or := &obtainingResult{
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BearerToken: box.Gate.BearerToken,
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SecretAccessKey: box.Gate.AccessKey,
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}
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enc := json.NewEncoder(w)
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enc.SetIndent("", " ")
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return enc.Encode(or)
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}
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func buildPlacementPolicy(placementRules string) (*netmap.PlacementPolicy, error) {
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if len(placementRules) != 0 {
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return policy.Parse(placementRules)
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}
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/*
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REP 1 IN X // place one copy of object
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CBF 1
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SELECT 2 From * AS X // in container of two nodes
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*/
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pp := new(netmap.PlacementPolicy)
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pp.SetContainerBackupFactor(1)
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pp.SetReplicas([]*netmap.Replica{newReplica("X", 1)}...)
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pp.SetSelectors([]*netmap.Selector{newSimpleSelector("X", 2)}...)
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return pp, nil
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}
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// selects <count> nodes in container without any additional attributes.
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func newSimpleSelector(name string, count uint32) (s *netmap.Selector) {
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s = new(netmap.Selector)
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s.SetCount(count)
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s.SetFilter("*")
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s.SetName(name)
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return
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}
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func newReplica(name string, count uint32) (r *netmap.Replica) {
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r = new(netmap.Replica)
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r.SetCount(count)
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r.SetSelector(name)
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return
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}
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func buildEACLTable(cid *cid.ID, eaclTable []byte) (*eacl.Table, error) {
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table := eacl.NewTable()
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if len(eaclTable) != 0 {
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return table, table.UnmarshalJSON(eaclTable)
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}
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record := eacl.NewRecord()
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record.SetOperation(eacl.OperationGet)
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record.SetAction(eacl.ActionAllow)
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// TODO: Change this later.
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// from := eacl.HeaderFromObject
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// matcher := eacl.MatchStringEqual
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// record.AddFilter(from eacl.FilterHeaderType, matcher eacl.Match, name string, value string)
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eacl.AddFormedTarget(record, eacl.RoleOthers)
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table.SetCID(cid)
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table.AddRecord(record)
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return table, nil
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}
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func buildContext(rules []byte) (*session.ContainerContext, error) {
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sessionCtx := session.NewContainerContext() // wildcard == true on by default
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if len(rules) != 0 {
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// cast ToV2 temporary, because there is no method for unmarshalling in ContainerContext in api-go
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err := sessionCtx.UnmarshalJSON(rules)
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if err != nil {
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return nil, fmt.Errorf("failed to read rules for session token: %w", err)
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}
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return sessionCtx, nil
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}
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sessionCtx.ForPut()
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sessionCtx.ApplyTo(nil)
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return sessionCtx, nil
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}
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func buildBearerToken(key *keys.PrivateKey, table *eacl.Table, lifetime lifetimeOptions, gateKey *keys.PublicKey) (*token.BearerToken, error) {
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oid, err := OwnerIDFromNeoFSKey(gateKey)
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if err != nil {
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return nil, err
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}
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bearerToken := token.NewBearerToken()
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bearerToken.SetEACLTable(table)
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bearerToken.SetOwner(oid)
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bearerToken.SetLifetime(lifetime.Exp, lifetime.Iat, lifetime.Iat)
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return bearerToken, bearerToken.SignToken(&key.PrivateKey)
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}
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func buildBearerTokens(key *keys.PrivateKey, table *eacl.Table, lifetime lifetimeOptions, gatesKeys []*keys.PublicKey) ([]*token.BearerToken, error) {
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bearerTokens := make([]*token.BearerToken, 0, len(gatesKeys))
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for _, gateKey := range gatesKeys {
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tkn, err := buildBearerToken(key, table, lifetime, gateKey)
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if err != nil {
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return nil, err
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}
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bearerTokens = append(bearerTokens, tkn)
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}
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return bearerTokens, nil
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}
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func buildSessionToken(key *keys.PrivateKey, oid *owner.ID, lifetime lifetimeOptions, ctx *session.ContainerContext, gateKey *keys.PublicKey) (*session.Token, error) {
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tok := session.NewToken()
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tok.SetContext(ctx)
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uid, err := uuid.New().MarshalBinary()
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if err != nil {
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return nil, err
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}
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tok.SetID(uid)
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tok.SetOwnerID(oid)
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tok.SetSessionKey(gateKey.Bytes())
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tok.SetIat(lifetime.Iat)
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tok.SetNbf(lifetime.Iat)
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tok.SetExp(lifetime.Exp)
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return tok, tok.Sign(&key.PrivateKey)
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}
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func buildSessionTokens(key *keys.PrivateKey, oid *owner.ID, lifetime lifetimeOptions, ctx *session.ContainerContext, gatesKeys []*keys.PublicKey) ([]*session.Token, error) {
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sessionTokens := make([]*session.Token, 0, len(gatesKeys))
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for _, gateKey := range gatesKeys {
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tkn, err := buildSessionToken(key, oid, lifetime, ctx, gateKey)
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if err != nil {
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return nil, err
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}
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sessionTokens = append(sessionTokens, tkn)
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}
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return sessionTokens, nil
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}
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func createTokens(options *IssueSecretOptions, lifetime lifetimeOptions, cid *cid.ID) ([]*accessbox.GateData, error) {
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gates := make([]*accessbox.GateData, len(options.GatesPublicKeys))
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table, err := buildEACLTable(cid, options.EACLRules)
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if err != nil {
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return nil, fmt.Errorf("failed to build eacl table: %w", err)
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}
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bearerTokens, err := buildBearerTokens(options.NeoFSKey, table, lifetime, options.GatesPublicKeys)
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if err != nil {
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return nil, fmt.Errorf("failed to build bearer tokens: %w", err)
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}
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for i, gateKey := range options.GatesPublicKeys {
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gates[i] = accessbox.NewGateData(gateKey, bearerTokens[i])
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}
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if options.SessionTkn {
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sessionRules, err := buildContext(options.ContextRules)
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if err != nil {
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return nil, fmt.Errorf("failed to build context for session token: %w", err)
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}
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oid, err := OwnerIDFromNeoFSKey(options.NeoFSKey.PublicKey())
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if err != nil {
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return nil, err
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}
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sessionTokens, err := buildSessionTokens(options.NeoFSKey, oid, lifetime, sessionRules, options.GatesPublicKeys)
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if err != nil {
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return nil, err
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}
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for i, sessionToken := range sessionTokens {
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gates[i].SessionToken = sessionToken
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}
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}
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return gates, nil
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}
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func OwnerIDFromNeoFSKey(key *keys.PublicKey) (*owner.ID, error) {
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wallet, err := owner.NEO3WalletFromPublicKey((*ecdsa.PublicKey)(key))
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if err != nil {
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return nil, err
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}
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return owner.NewIDFromNeo3Wallet(wallet), nil
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}
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