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# CMSEncoderGetCertificateChainMode(_:_:)

Obtains a constant that indicates which certificates are to be included in a signed CMS message.

```
func CMSEncoderGetCertificateChainMode(_ cmsEncoder: CMSEncoder, _ chainModeOut: UnsafeMutablePointer<CMSCertificateChainMode>) -> OSStatus
```

## Parameters

`cmsEncoder`

The CMSEncoder reference returned by the `CMSEncoderCreate` function.

`chainModeOut`

On return, a constant that indicates which certificate or certificates are to be included in the message. See [`CMSCertificateChainMode`](/documentation/Security/CMSCertificateChainMode).

## Return Value

A result code. See [Security Framework Result Codes](/documentation/Security/security-framework-result-codes).

## See Also

[`CMSEncoderCreate(_:)`](/documentation/Security/CMSEncoderCreate(_:))

Creates a CMSEncoder reference.


---

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