Questions about JFK

[Jared Jacobson <jmj52@cs.byu.edu>]

The answer to this question may be incredibly obvious to the members of 
the mailing list, but it has been bothering me for some time.  I've read 
through the JFK draft (draft-ietf-ipsec-jfk-02.txt) several times and 
scoured all the IPsec RFC's I thought may contain some material 
"assumed" in the JFK draft, and I am still unable to answer it.  How 
does one communicate the IV that one has used in encrypting the various 
encrypted parts of the exchange?  And how does JFK generate sufficient 
keying material for the encryption key Ke in the case of 3DES (since 
SHA-1 only produces 20 bytes of data, for example)?  IKEv1 and IKEv2 
have explicit provision for generating sufficient keying material, but I 
was unable to find it in the JFK draft.  Any help in this regard would 
be appreciated.

Jared