# Function: importPKCS8()

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▸ **importPKCS8**(`pkcs8`, `alg`, `options?`): [`Promise`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Promise)\<[`CryptoKey`](https://developer.mozilla.org/docs/Web/API/CryptoKey)\>

Imports a PEM-encoded PKCS#8 string as a [CryptoKey](https://developer.mozilla.org/docs/Web/API/CryptoKey).

> [!NOTE]\
> The OID id-RSASSA-PSS (1.2.840.113549.1.1.10) is not supported in
> [Web Cryptography API](https://w3c.github.io/webcrypto/), use the OID rsaEncryption
> (1.2.840.113549.1.1.1) instead for all RSA algorithms.

This function is exported (as a named export) from the main `'jose'` module entry point as well
as from its subpath export `'jose/key/import'`.

## Parameters

| Parameter | Type | Description |
| ------ | ------ | ------ |
| `pkcs8` | `string` | PEM-encoded PKCS#8 string |
| `alg` | `string` | JSON Web Algorithm identifier to be used with the imported key. See [Algorithm Key Requirements](https://github.com/panva/jose/issues/210). |
| `options?` | [`KeyImportOptions`](../interfaces/KeyImportOptions.md) | - |

## Returns

[`Promise`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Promise)\<[`CryptoKey`](https://developer.mozilla.org/docs/Web/API/CryptoKey)\>

## Example

```js
const algorithm = 'ES256'
const pkcs8 = `-----BEGIN PRIVATE KEY-----
MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgiyvo0X+VQ0yIrOaN
nlrnUclopnvuuMfoc8HHly3505OhRANCAAQWUcdZ8uTSAsFuwtNy4KtsKqgeqYxg
l6kwL5D4N3pEGYGIDjV69Sw0zAt43480WqJv7HCL0mQnyqFmSrxj8jMa
-----END PRIVATE KEY-----`
const ecPrivateKey = await jose.importPKCS8(pkcs8, algorithm)
```