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# CMSDecoderCopyContent(_:_:)

Obtains the message content, if any.

```
func CMSDecoderCopyContent(_ cmsDecoder: CMSDecoder, _ contentOut: UnsafeMutablePointer<CFData?>) -> OSStatus
```

## Parameters

`cmsDecoder`

The CMSDecoder reference returned by the `CMSDecoderCreate` function.

`contentOut`

On return, points to the message’s content. Returns `NULL` if the content is detached. You must use the `CFRelease` function to free this reference when you are finished using it.

## Return Value

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

## Discussion

If the message has detached content, you are responsible for retrieving the content. In that case, you use the [`CMSDecoderSetDetachedContent(_:_:)`](/documentation/Security/CMSDecoderSetDetachedContent(_:_:)) function to tell the decoder the location of the content.

You cannot call this function until after you have called the `CMSDecoderFinalizeMessage` function.

## See Also

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

Specifies whether the signed data is to be separate from the message.

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

Specifies the message’s detached content, if any.

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

Creates a CMSDecoder reference.

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

Indicates that there is no more data to decode.


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