Russ/Dave,
When used in conjunction with the Crypto++ freeware library, the S/MIME
Freeware Library (SFL) implements the RFC 2631 Diffie-Hellman (D-H) Key
Agreement Method specification. Wang Government Services has successfully
performed interop testing of Ephemeral-Static (E-S) D-H-protected
envelopedData objects between the SFL and Microsoft.
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John Pawling, john(_dot_)pawling(_at_)wang(_dot_)com
Wang Government Services, Inc.,
A Getronics Company
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