@abstract Decode a CMS message from BER encoded data.
@discussion This function basically does the same as calling
SecCmsDecoderStart(), SecCmsDecoderUpdate() and SecCmsDecoderFinish().
- @param DERmessage Pointer to a SecAsn1Item containing the BER encoded cms
+ @param encodedMessage Pointer to a SecAsn1Item containing the BER encoded cms
message to decode.
@param cb callback function for delivery of inner content inner
content will be stored in the message if cb is NULL.