# Class: CompactEncrypt

## [💗 Help the project](https://github.com/sponsors/panva)

Support from the community to continue maintaining and improving this module is welcome. If you find the module useful, please consider supporting the project by [becoming a sponsor](https://github.com/sponsors/panva).

The CompactEncrypt class is used to build and encrypt Compact JWE strings.

This class is exported (as a named export) from the main `'jose'` module entry point as well as
from its subpath export `'jose/jwe/compact/encrypt'`.

## Example

```js
const jwe = await new jose.CompactEncrypt(
  new TextEncoder().encode('It’s a dangerous business, Frodo, going out your door.'),
)
  .setProtectedHeader({ alg: 'RSA-OAEP-256', enc: 'A256GCM' })
  .encrypt(publicKey)

console.log(jwe)
```

## Constructors

### Constructor

▸ **new CompactEncrypt**(`plaintext`): `CompactEncrypt`

CompactEncrypt constructor

#### Parameters

| Parameter | Type | Description |
| ------ | ------ | ------ |
| `plaintext` | [`Uint8Array`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) | Binary representation of the plaintext to encrypt. |

#### Returns

`CompactEncrypt`

## Methods

### encrypt()

▸ **encrypt**(`key`, `options?`): [`Promise`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Promise)\<`string`\>

Encrypts and resolves the value of the Compact JWE string.

#### Parameters

| Parameter | Type | Description |
| ------ | ------ | ------ |
| `key` | [`KeyInput`](../../../../types/type-aliases/KeyInput.md) | Public Key or Secret to encrypt the JWE with. See [Algorithm Key Requirements](https://github.com/panva/jose/issues/210#jwe-alg). |
| `options?` | [`EncryptOptions`](../../../../types/interfaces/EncryptOptions.md) | JWE Encryption options. |

#### Returns

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

***

### ~~setContentEncryptionKey()~~

▸ **setContentEncryptionKey**(`cek`): `this`

Sets a content encryption key to use, by default a random suitable one is generated for the JWE
"enc" (Encryption Algorithm) Header Parameter.

#### Parameters

| Parameter | Type | Description |
| ------ | ------ | ------ |
| `cek` | [`Uint8Array`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) | JWE Content Encryption Key. |

#### Returns

`this`

#### Deprecated

You should not use this method. It is only really intended for test and vector
  validation purposes.

***

### ~~setInitializationVector()~~

▸ **setInitializationVector**(`iv`): `this`

Sets the JWE Initialization Vector to use for content encryption, by default a random suitable
one is generated for the JWE "enc" (Encryption Algorithm) Header Parameter.

#### Parameters

| Parameter | Type | Description |
| ------ | ------ | ------ |
| `iv` | [`Uint8Array`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) | JWE Initialization Vector. |

#### Returns

`this`

#### Deprecated

You should not use this method. It is only really intended for test and vector
  validation purposes.

***

### setKeyManagementParameters()

▸ **setKeyManagementParameters**(`parameters`): `this`

Sets the JWE Key Management parameters to be used when encrypting. Use this method instead of
the header setters to configure algorithm inputs such as ECDH-ES "apu" (Agreement PartyUInfo)
and "apv" (Agreement PartyVInfo), or PBES2 "p2c" (PBES2 Count). The parameters are added to the
appropriate JOSE Header.

#### Parameters

| Parameter | Type | Description |
| ------ | ------ | ------ |
| `parameters` | [`JWEKeyManagementHeaderParameters`](../../../../types/interfaces/JWEKeyManagementHeaderParameters.md) | JWE Key Management parameters. |

#### Returns

`this`

***

### setProtectedHeader()

▸ **setProtectedHeader**(`protectedHeader`): `this`

Sets the JWE Protected Header on the CompactEncrypt object.

#### Parameters

| Parameter | Type | Description |
| ------ | ------ | ------ |
| `protectedHeader` | [`CompactJWEHeaderParameters`](../../../../types/interfaces/CompactJWEHeaderParameters.md) | JWE Protected Header object. |

#### Returns

`this`
