openid-client/docs/functions/ClientSecretJwt.md

# Function: ClientSecretJwt()

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***

▸ **ClientSecretJwt**(`clientSecret?`, `options?`): [`ClientAuth`](../type-aliases/ClientAuth.md)

**`client_secret_jwt`** uses the HTTP request body to send `client_id`,
`client_assertion_type`, and `client_assertion` as
`application/x-www-form-urlencoded` body parameters. HMAC is used for the
assertion's authenticity and integrity.

## Parameters

| Parameter | Type | Description |
| ------ | ------ | ------ |
| `clientSecret?` | `string` | Client Secret |
| `options?` | [`ModifyAssertionOptions`](../interfaces/ModifyAssertionOptions.md) | - |

## Returns

[`ClientAuth`](../type-aliases/ClientAuth.md)

## Examples

Usage with a [Configuration](../classes/Configuration.md) obtained through [discovery](discovery.md)

```ts
let server!: URL
let clientId!: string
let clientSecret!: string
let clientMetadata!: Partial<client.ClientMetadata> | string | undefined

let config = await client.discovery(
  server,
  clientId,
  clientMetadata,
  client.ClientSecretJwt(clientSecret),
)
```

Usage with a [Configuration](../classes/Configuration.md) instance

```ts
let server!: client.ServerMetadata
let clientId!: string
let clientSecret!: string
let clientMetadata!: Partial<client.ClientMetadata> | string | undefined

let config = new client.Configuration(
  server,
  clientId,
  clientMetadata,
  client.ClientSecretJwt(clientSecret),
)
```

## See

 - [OAuth Token Endpoint Authentication Methods](https://www.iana.org/assignments/oauth-parameters/oauth-parameters.xhtml#token-endpoint-auth-method)
 - [OpenID Connect Core 1.0](https://openid.net/specs/openid-connect-core-1_0-errata2.html#ClientAuthentication)