- added support for tripple length key in DES_OFB and DES_CFB mode
 - fixed mac_sign_update/final, mac_verify_update/final
   functions for DES, DES3 and AES
 - fixed encrypt_update/final, decrypt_update/final functions
   for DES, DES3 and AES in OFB and CFB modes

Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com>