grafana/k6 · error

key get length not implemented for algorithm {name}

Error message

key get length not implemented for algorithm {name}

What it means

Error "key get length not implemented for algorithm {name}" thrown in grafana/k6.

Source

Thrown at internal/js/modules/k6/webcrypto/key.go:254

	return kd, nil
}

// KeyGetLengther is the interface implemented by the parameters used to
// get the key length of cryptographic keys
type KeyGetLengther interface {
	GetKeyLength() int
}

func newKeyGetLengther(rt *sobek.Runtime, normalized Algorithm, params sobek.Value) (KeyGetLengther, error) {
	var kgi KeyGetLengther
	var err error

	switch normalized.Name {
	case AESCbc, AESCtr, AESGcm, AESKw:
		kgi, err = newAESGetLengthParams(rt, normalized, params)
	default:
		return nil, errors.New("key get length not implemented for algorithm " + normalized.Name)
	}

	if err != nil {
		return nil, err
	}

	return kgi, nil
}

// KeyImporter is the interface implemented by the parameters used to import
// cryptographic keys.
type KeyImporter interface {
	ImportKey(format KeyFormat, keyData []byte, extractable bool, keyUsages []CryptoKeyUsage) (*CryptoKey, error)
}

func newKeyImporter(rt *sobek.Runtime, normalized Algorithm, params sobek.Value) (KeyImporter, error) {
	var ki KeyImporter
	var err error

View on GitHub (pinned to 93accf6570)

When it happens

Trigger: Thrown at internal/js/modules/k6/webcrypto/key.go:254 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of grafana/k6@93accf6570 (2026-08-15). Data as JSON: /api/errors/11c7b78ef77b914c. Report an issue: GitHub.