Ooops I messed up my response and got key agreement and transport
transposed sorry. Hopefully it should have read...
Dr Stephen Henson wrote:
The key encryption key algorithm and key transport algorithm is
determined implicitly from the keyEncryptionAlgorithm (which is now a
"key transport algorithm and key encryption algorithm") and the IV is
'A5' as mentioned in 12.6.2 (6).
I meant key agreement algorithm...
KeyTransRecipientInfo ::= SEQUENCE {
version CMSVersion, -- always set to 0 or 2
rid RecipientIdentifier,
keyTransportAlgorithm KeyTransportAlgorithmIdentifier,
keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier,
encryptedKey EncryptedKey }
Likewise this proposal should read:
KeyAgreeRecipientInfo ::= SEQUENCE {
version CMSVersion, -- always set to 3
originator [0] EXPLICIT OriginatorIdentifierOrKey,
ukm [1] EXPLICIT UserKeyingMaterial OPTIONAL,
keyArgeeAlgorithmIdentifier KeyAgreeAlgorithmIdentifier,
keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier,
recipientEncryptedKeys RecipientEncryptedKeys }
Steve.
--
Dr Stephen N. Henson. UK based freelance Cryptographic Consultant.
For info see homepage at http://www.drh-consultancy.demon.co.uk/
Email: shenson(_at_)drh-consultancy(_dot_)demon(_dot_)co(_dot_)uk
PGP key: via homepage.