Hello,

I need to exchange encrypted content with an existing application on Windows 
with an RC4 key that is salted as per 
http://msdn.microsoft.com/en-us/library/aa387782%28v=vs.85%29.aspx 
(KP_SALT_EX). Note that this is not a passphrase and salt key derivation, but a 
cipher initialized with some a known key and known initialization vector, 
similar to a block cipher.

I think technically RC4 does not have an IV, but what is the equivalent 
operation I can perform in openssl to get the cipher in the desired state? 
Specifying the salt as the iv param in EVP_EncryptInit does not work.

TIA,
~ Remus


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