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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 the key should be exported in. Currently supported formats: raw. |
key | CryptoKey | The key to export. |
Return Value
A Promise that resolves to a new ArrayBuffer 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 verfiy its integrity.
*/
const importedKey = await crypto.subtle.importKey('raw', exportedKey, 'AES-CBC', true, ['encrypt', 'decrypt']);
console.log(JSON.stringify(importedKey));
}