generate a signed object that for a CMS Signed Data
object using the given provider - if encapsulate is true a copy
of the message will be included in the signature with the
default content type "data".
generate a signed object that for a CMS Signed Data
object using the given provider - if encapsulate is true a copy
of the message will be included in the signature.
the KeyTransRecipientInformation class for a recipient who has been sent a secret
key encrypted using their public key that needs to be used to
extract the message.
verify that the given certificate succesfully handles and confirms
the signature associated with this signer and, if a signingTime
attribute is available, that the certificate was valid at the time the
signature was generated.