RecipientInfo Syntax to support passwords-based key managament and more

John:

I think that it is time to take this previously closed discussion to the 
whole list.
John has proposed the following.

> RecipientInfo should be changed as follows (or similar):
>
>      RecipientInfo ::= CHOICE {
>       ktri KeyTransRecipientInfo,
>       kari [1] KeyAgreeRecipientInfo,
>       kekri [2] KEKRecipientInfo,
>       other [3] OtherRecipientInfo}      }
>
>       OtherRecipientInfo ::= SEQUENCE {
>         recipientInfoType OBJECT IDENTIFIER,
>         recipientInfoValue [0] EXPLICIT ANY}
At this point, I think it might be unfair to anyone that may have 
implemented password-based key management.  Therefore, I propose that it 
should be included as a possibility in the base CHOICE.  Thus:
    RecipientInfo ::= CHOICE {
      ktri KeyTransRecipientInfo,
      kari [1] KeyAgreeRecipientInfo,
      kekri [2] KEKRecipientInfo,
      pwri [3] PasswordRecipientinfo,
      other [0] OtherRecipientInfo }

      OtherRecipientInfo ::= SEQUENCE {
        oriType OBJECT IDENTIFIER,
        oriValue [0] EXPLICIT ANY DEFINED BY oriType }

Russ