# CMSDecoderIsContentEncrypted(_:_:) Determines whether a CMS message was encrypted. ``` func CMSDecoderIsContentEncrypted(_ cmsDecoder: CMSDecoder, _ isEncryptedOut: UnsafeMutablePointer) -> OSStatus ``` ## Parameters `cmsDecoder` The CMSDecoder reference returned by the `CMSDecoderCreate` function. `isEncryptedOut` Returns `TRUE` if the message was encrypted. ## Return Value A result code. See [Security Framework Result Codes](/documentation/Security/security-framework-result-codes). ## Discussion Note that if the message was encrypted and the decoding succeeded (`CMSDecoderFinalizeMessage` returned `noErr`), then the message was successfully decrypted. Call [`CMSDecoderCopyContent(_:_:)`](/documentation/Security/CMSDecoderCopyContent(_:_:)) to retrieve the decrypted content. You cannot call this function until after you have called the `CMSDecoderFinalizeMessage` function. ## See Also [`CMSDecoderCreate(_:)`](/documentation/Security/CMSDecoderCreate(_:)) Creates a CMSDecoder reference. [`CMSEncoderAddRecipients(_:_:)`](/documentation/Security/CMSEncoderAddRecipients(_:_:)) Specifies a message is to be encrypted and specifies the recipients of the message. [`CMSDecoderFinalizeMessage(_:)`](/documentation/Security/CMSDecoderFinalizeMessage(_:)) Indicates that there is no more data to decode. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)