frostfs-node/pkg/services/object/util/key.go

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package util
import (
"crypto/ecdsa"
"fmt"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/netmap"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/session/storage"
apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
"github.com/google/uuid"
)
// SessionSource is an interface tha provides
// access to node's actual (not expired) session
// tokens.
type SessionSource interface {
// Get must return non-expired private token that
// corresponds with passed owner and tokenID. If
// token has not been created, has been expired
// of it is impossible to get information about the
// token Get must return nil.
Get(owner user.ID, tokenID []byte) *storage.PrivateToken
}
// KeyStorage represents private key storage of the local node.
type KeyStorage struct {
key *ecdsa.PrivateKey
tokenStore SessionSource
networkState netmap.State
}
// NewKeyStorage creates, initializes and returns new KeyStorage instance.
func NewKeyStorage(localKey *ecdsa.PrivateKey, tokenStore SessionSource, net netmap.State) *KeyStorage {
return &KeyStorage{
key: localKey,
tokenStore: tokenStore,
networkState: net,
}
}
// SessionInfo groups information about FrostFS Object session
// which is reflected in KeyStorage.
type SessionInfo struct {
// Session unique identifier.
ID uuid.UUID
// Session issuer.
Owner user.ID
}
// GetKey fetches private key depending on the SessionInfo.
//
// If info is not `nil`, searches for dynamic session token through the
// underlying token storage. Returns apistatus.SessionTokenNotFound if
// token storage does not contain information about provided dynamic session.
//
// If info is `nil`, returns node's private key.
func (s *KeyStorage) GetKey(info *SessionInfo) (*ecdsa.PrivateKey, error) {
if info != nil {
binID, err := info.ID.MarshalBinary()
if err != nil {
return nil, fmt.Errorf("marshal ID: %w", err)
}
pToken := s.tokenStore.Get(info.Owner, binID)
if pToken != nil {
if pToken.ExpiredAt() <= s.networkState.CurrentEpoch() {
return nil, new(apistatus.SessionTokenExpired)
}
return pToken.SessionKey(), nil
}
return nil, new(apistatus.SessionTokenNotFound)
}
return s.key, nil
}