This is documentation for the next version of K6. For the latest stable release, go to the latest version.
exportKey
The exportKey()
method takes a CryptoKey object as input and exports it in an external, portable format.
Note that for a key to be exportable, it must have been created with the extractable
flag set to true
.
Usage
exportKey(format, key)
Parameters
Name | Type | Description |
---|---|---|
format | string | Defines the data format in which the key should be exported. Depending on the algorithm and key type, the data format could vary. Currently supported formats are raw , jwk , spki , and pkcs8 . |
key | CryptoKey | The key to export. |
Supported algorithms
AES-CBC | AES-CTR | AES-GCM | AES-KW | ECDH | ECDSA | HMAC | RSA-OAEP | RSASSA-PKCS1-v1_5 | RSA-PSS |
---|---|---|---|---|---|---|---|---|---|
✅ AesCbcParams | ✅ AesCtrParams | ✅ AesGcmParams | ❌ | ✅ EcdhKeyDeriveParams | ✅ EcdsaParams | ✅ HmacKeyGenParams | ✅ RsaHashedImportParams | ✅ RsaHashedImportParams | ✅ RsaHashedImportParams |
Supported formats
ECDH
andECDSA
algorithms have support forpkcs8
,spki
,raw
andjwk
formats.RSA-OAEP
,RSASSA-PKCS1-v1_5
andRSA-PSS
algorithms have support forpkcs8
,spki
andjwk
formats.AES-*
andHMAC
algorithms have currently support forraw
andjwk
formats.
Return Value
A Promise
that resolves to a new ArrayBuffer
or an JsonWebKey object/dictionary containing the key.
Throws
Type | Description |
---|---|
InvalidAccessError | Raised when trying to export a non-extractable key. |
NotSupportedError | Raised when trying to export in an unknown format. |
TypeError | Raised when trying to use an invalid format. |
Example
import { crypto } from 'k6/experimental/webcrypto';
export default async function () {
/**
* Generate a symmetric key using the AES-CBC algorithm.
*/
const generatedKey = await crypto.subtle.generateKey(
{
name: 'AES-CBC',
length: '256',
},
true,
['encrypt', 'decrypt']
);
/**
* Export the key in raw format.
*/
const exportedKey = await crypto.subtle.exportKey('raw', generatedKey);
/**
* Reimport the key in raw format to verify its integrity.
*/
const importedKey = await crypto.subtle.importKey('raw', exportedKey, 'AES-CBC', true, [
'encrypt',
'decrypt',
]);
console.log(JSON.stringify(importedKey));
}