package nosql import ( "context" "crypto/rand" "encoding/json" "sync" "time" "github.com/pkg/errors" "github.com/smallstep/certificates/acme" nosqlDB "github.com/smallstep/nosql" ) // externalAccountKeyMutex for read/write locking of EAK operations. var externalAccountKeyMutex sync.RWMutex // referencesByProvisionerIndexMutex for locking referencesByProvisioner index operations. var referencesByProvisionerIndexMutex sync.Mutex type dbExternalAccountKey struct { ID string `json:"id"` ProvisionerID string `json:"provisionerID"` Reference string `json:"reference"` AccountID string `json:"accountID,omitempty"` HmacKey []byte `json:"key"` CreatedAt time.Time `json:"createdAt"` BoundAt time.Time `json:"boundAt"` } type dbExternalAccountKeyReference struct { Reference string `json:"reference"` ExternalAccountKeyID string `json:"externalAccountKeyID"` } // getDBExternalAccountKey retrieves and unmarshals dbExternalAccountKey. func (db *DB) getDBExternalAccountKey(ctx context.Context, id string) (*dbExternalAccountKey, error) { data, err := db.db.Get(externalAccountKeyTable, []byte(id)) if err != nil { if nosqlDB.IsErrNotFound(err) { return nil, acme.ErrNotFound } return nil, errors.Wrapf(err, "error loading external account key %s", id) } dbeak := new(dbExternalAccountKey) if err = json.Unmarshal(data, dbeak); err != nil { return nil, errors.Wrapf(err, "error unmarshaling external account key %s into dbExternalAccountKey", id) } return dbeak, nil } // CreateExternalAccountKey creates a new External Account Binding key with a name func (db *DB) CreateExternalAccountKey(ctx context.Context, provisionerID, reference string) (*acme.ExternalAccountKey, error) { externalAccountKeyMutex.Lock() defer externalAccountKeyMutex.Unlock() keyID, err := randID() if err != nil { return nil, err } random := make([]byte, 32) _, err = rand.Read(random) if err != nil { return nil, err } dbeak := &dbExternalAccountKey{ ID: keyID, ProvisionerID: provisionerID, Reference: reference, HmacKey: random, CreatedAt: clock.Now(), } if err := db.save(ctx, keyID, dbeak, nil, "external_account_key", externalAccountKeyTable); err != nil { return nil, err } if err := db.addEAKID(ctx, provisionerID, dbeak.ID); err != nil { return nil, err } if dbeak.Reference != "" { dbExternalAccountKeyReference := &dbExternalAccountKeyReference{ Reference: dbeak.Reference, ExternalAccountKeyID: dbeak.ID, } if err := db.save(ctx, referenceKey(provisionerID, dbeak.Reference), dbExternalAccountKeyReference, nil, "external_account_key_reference", externalAccountKeyIDsByReferenceTable); err != nil { return nil, err } } return &acme.ExternalAccountKey{ ID: dbeak.ID, ProvisionerID: dbeak.ProvisionerID, Reference: dbeak.Reference, AccountID: dbeak.AccountID, HmacKey: dbeak.HmacKey, CreatedAt: dbeak.CreatedAt, BoundAt: dbeak.BoundAt, }, nil } // GetExternalAccountKey retrieves an External Account Binding key by KeyID func (db *DB) GetExternalAccountKey(ctx context.Context, provisionerID, keyID string) (*acme.ExternalAccountKey, error) { externalAccountKeyMutex.RLock() defer externalAccountKeyMutex.RUnlock() dbeak, err := db.getDBExternalAccountKey(ctx, keyID) if err != nil { return nil, err } if dbeak.ProvisionerID != provisionerID { return nil, acme.NewError(acme.ErrorUnauthorizedType, "provisioner does not match provisioner for which the EAB key was created") } return &acme.ExternalAccountKey{ ID: dbeak.ID, ProvisionerID: dbeak.ProvisionerID, Reference: dbeak.Reference, AccountID: dbeak.AccountID, HmacKey: dbeak.HmacKey, CreatedAt: dbeak.CreatedAt, BoundAt: dbeak.BoundAt, }, nil } func (db *DB) DeleteExternalAccountKey(ctx context.Context, provisionerID, keyID string) error { externalAccountKeyMutex.Lock() defer externalAccountKeyMutex.Unlock() dbeak, err := db.getDBExternalAccountKey(ctx, keyID) if err != nil { return errors.Wrapf(err, "error loading ACME EAB Key with Key ID %s", keyID) } if dbeak.ProvisionerID != provisionerID { return errors.New("provisioner does not match provisioner for which the EAB key was created") } if dbeak.Reference != "" { if err := db.db.Del(externalAccountKeyIDsByReferenceTable, []byte(referenceKey(provisionerID, dbeak.Reference))); err != nil { return errors.Wrapf(err, "error deleting ACME EAB Key reference with Key ID %s and reference %s", keyID, dbeak.Reference) } } if err := db.db.Del(externalAccountKeyTable, []byte(keyID)); err != nil { return errors.Wrapf(err, "error deleting ACME EAB Key with Key ID %s", keyID) } if err := db.deleteEAKID(ctx, provisionerID, keyID); err != nil { return errors.Wrapf(err, "error removing ACME EAB Key ID %s", keyID) } return nil } // GetExternalAccountKeys retrieves all External Account Binding keys for a provisioner func (db *DB) GetExternalAccountKeys(ctx context.Context, provisionerID, cursor string, limit int) ([]*acme.ExternalAccountKey, string, error) { externalAccountKeyMutex.RLock() defer externalAccountKeyMutex.RUnlock() // cursor and limit are ignored in open source, at least for now. var eakIDs []string r, err := db.db.Get(externalAccountKeyIDsByProvisionerIDTable, []byte(provisionerID)) if err != nil { if !nosqlDB.IsErrNotFound(err) { return nil, "", errors.Wrapf(err, "error loading ACME EAB Key IDs for provisioner %s", provisionerID) } // it may happen that no record is found; we'll continue with an empty slice } else { if err := json.Unmarshal(r, &eakIDs); err != nil { return nil, "", errors.Wrapf(err, "error unmarshaling ACME EAB Key IDs for provisioner %s", provisionerID) } } keys := []*acme.ExternalAccountKey{} for _, eakID := range eakIDs { if eakID == "" { continue // shouldn't happen; just in case } eak, err := db.getDBExternalAccountKey(ctx, eakID) if err != nil { if !nosqlDB.IsErrNotFound(err) { return nil, "", errors.Wrapf(err, "error retrieving ACME EAB Key for provisioner %s and keyID %s", provisionerID, eakID) } } keys = append(keys, &acme.ExternalAccountKey{ ID: eak.ID, HmacKey: eak.HmacKey, ProvisionerID: eak.ProvisionerID, Reference: eak.Reference, AccountID: eak.AccountID, CreatedAt: eak.CreatedAt, BoundAt: eak.BoundAt, }) } return keys, "", nil } // GetExternalAccountKeyByReference retrieves an External Account Binding key with unique reference func (db *DB) GetExternalAccountKeyByReference(ctx context.Context, provisionerID, reference string) (*acme.ExternalAccountKey, error) { externalAccountKeyMutex.RLock() defer externalAccountKeyMutex.RUnlock() if reference == "" { return nil, nil } k, err := db.db.Get(externalAccountKeyIDsByReferenceTable, []byte(referenceKey(provisionerID, reference))) if nosqlDB.IsErrNotFound(err) { return nil, acme.ErrNotFound } else if err != nil { return nil, errors.Wrapf(err, "error loading ACME EAB key for reference %s", reference) } dbExternalAccountKeyReference := new(dbExternalAccountKeyReference) if err := json.Unmarshal(k, dbExternalAccountKeyReference); err != nil { return nil, errors.Wrapf(err, "error unmarshaling ACME EAB key for reference %s", reference) } return db.GetExternalAccountKey(ctx, provisionerID, dbExternalAccountKeyReference.ExternalAccountKeyID) } func (db *DB) GetExternalAccountKeyByAccountID(ctx context.Context, provisionerID, accountID string) (*acme.ExternalAccountKey, error) { return nil, nil } func (db *DB) UpdateExternalAccountKey(ctx context.Context, provisionerID string, eak *acme.ExternalAccountKey) error { externalAccountKeyMutex.Lock() defer externalAccountKeyMutex.Unlock() old, err := db.getDBExternalAccountKey(ctx, eak.ID) if err != nil { return err } if old.ProvisionerID != provisionerID { return errors.New("provisioner does not match provisioner for which the EAB key was created") } if old.ProvisionerID != eak.ProvisionerID { return errors.New("cannot change provisioner for an existing ACME EAB Key") } if old.Reference != eak.Reference { return errors.New("cannot change reference for an existing ACME EAB Key") } nu := dbExternalAccountKey{ ID: eak.ID, ProvisionerID: eak.ProvisionerID, Reference: eak.Reference, AccountID: eak.AccountID, HmacKey: eak.HmacKey, CreatedAt: eak.CreatedAt, BoundAt: eak.BoundAt, } return db.save(ctx, nu.ID, nu, old, "external_account_key", externalAccountKeyTable) } func (db *DB) addEAKID(ctx context.Context, provisionerID, eakID string) error { referencesByProvisionerIndexMutex.Lock() defer referencesByProvisionerIndexMutex.Unlock() if eakID == "" { return errors.Errorf("can't add empty eakID for provisioner %s", provisionerID) } var eakIDs []string b, err := db.db.Get(externalAccountKeyIDsByProvisionerIDTable, []byte(provisionerID)) if err != nil { if !nosqlDB.IsErrNotFound(err) { return errors.Wrapf(err, "error loading eakIDs for provisioner %s", provisionerID) } // it may happen that no record is found; we'll continue with an empty slice } else { if err := json.Unmarshal(b, &eakIDs); err != nil { return errors.Wrapf(err, "error unmarshaling eakIDs for provisioner %s", provisionerID) } } for _, id := range eakIDs { if id == eakID { // return an error when a duplicate ID is found return errors.Errorf("eakID %s already exists for provisioner %s", eakID, provisionerID) } } var newEAKIDs []string newEAKIDs = append(newEAKIDs, eakIDs...) newEAKIDs = append(newEAKIDs, eakID) var ( _old interface{} = eakIDs _new interface{} = newEAKIDs ) // ensure that the DB gets the expected value when the slice is empty; otherwise // it'll return with an error that indicates that the DBs view of the data is // different from the last read (i.e. _old is different from what the DB has). if len(eakIDs) == 0 { _old = nil } if err = db.save(ctx, provisionerID, _new, _old, "externalAccountKeyIDsByProvisionerID", externalAccountKeyIDsByProvisionerIDTable); err != nil { return errors.Wrapf(err, "error saving eakIDs index for provisioner %s", provisionerID) } return nil } func (db *DB) deleteEAKID(ctx context.Context, provisionerID, eakID string) error { referencesByProvisionerIndexMutex.Lock() defer referencesByProvisionerIndexMutex.Unlock() var eakIDs []string b, err := db.db.Get(externalAccountKeyIDsByProvisionerIDTable, []byte(provisionerID)) if err != nil { if !nosqlDB.IsErrNotFound(err) { return errors.Wrapf(err, "error loading eakIDs for provisioner %s", provisionerID) } // it may happen that no record is found; we'll continue with an empty slice } else { if err := json.Unmarshal(b, &eakIDs); err != nil { return errors.Wrapf(err, "error unmarshaling eakIDs for provisioner %s", provisionerID) } } newEAKIDs := removeElement(eakIDs, eakID) var ( _old interface{} = eakIDs _new interface{} = newEAKIDs ) // ensure that the DB gets the expected value when the slice is empty; otherwise // it'll return with an error that indicates that the DBs view of the data is // different from the last read (i.e. _old is different from what the DB has). if len(eakIDs) == 0 { _old = nil } if err = db.save(ctx, provisionerID, _new, _old, "externalAccountKeyIDsByProvisionerID", externalAccountKeyIDsByProvisionerIDTable); err != nil { return errors.Wrapf(err, "error saving eakIDs index for provisioner %s", provisionerID) } return nil } // referenceKey returns a unique key for a reference per provisioner func referenceKey(provisionerID, reference string) string { return provisionerID + "." + reference } // sliceIndex finds the index of item in slice func sliceIndex(slice []string, item string) int { for i := range slice { if slice[i] == item { return i } } return -1 } // removeElement deletes the item if it exists in the // slice. It returns a new slice, keeping the old one intact. func removeElement(slice []string, item string) []string { newSlice := make([]string, 0) index := sliceIndex(slice, item) if index < 0 { newSlice = append(newSlice, slice...) return newSlice } newSlice = append(newSlice, slice[:index]...) return append(newSlice, slice[index+1:]...) }