Hi all,

I've been (re)implementing all the ciphers we use to make use of EVP 
structures. On the wiki 
(http://wiki.openssl.org/index.php/EVP_Key_and_Parameter_Generation) there is 
an example to use EVP_PKEY for CMAC.
I am a bit confused on the intention of this: Basically, how do I use this 
generated "key" with the EVP_Encrypt/Decrypt Init/Update/Final functions since 
they require an EVP_CIPHER structure to work on the message data for which I 
want to calculate a tag.

Thanks
Leon

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