---
title: "CMSEncoderCopyEncapsulatedContentType(_:_:)"
framework: security
role: symbol
role_heading: Function
path: "security/cmsencodercopyencapsulatedcontenttype(_:_:)"
---

# CMSEncoderCopyEncapsulatedContentType(_:_:)

Obtains the object identifier for the encapsulated data of a signed message.

## Declaration

```swift
func CMSEncoderCopyEncapsulatedContentType(_ cmsEncoder: CMSEncoder, _ eContentTypeOut: UnsafeMutablePointer<CFData?>) -> OSStatus
```

## Parameters

- `cmsEncoder`: The CMSEncoder reference returned by the CMSEncoderCreate function.
- `eContentTypeOut`: On return, points to the object identifier for the encapsulated data in the signed message.

## Return Value

Return Value A result code. See Security Framework Result Codes.

## Discussion

Discussion In a signed message, the signed data consists of any type of data (the encapsulated content) plus the signature values. This function returns the object identifier (OID) of the encapsulated content as it was specified with the CMSEncoderSetEncapsulatedContentType function. If the CMSEncoderSetEncapsulatedContentType function has not been called for this message, this function returns a  NULL pointer.