RSA Security 5 manual CFB modes require a Bcfbparams structure, Depends on cipher type, as follows

		AI_FeedbackCipher
Table 2-2Algorithm methods for feedback modes
feedbackMethodName	Algorithm methods to include in chooser	Parameter Type
“ofb”	AM_OFB_DECRYPT;	ITEM that contains the
		initialization vector
“ofb_pipelined”	AM_OFB_PIPELINED_DECRYPT;	ITEM that contains the
		initialization vector

The CFB modes require a B_CFB_PARAMS structure:

typedef struct {

ITEM ivItem;

unsigned int transferSize;

}B_CFB_PARAMS;

Note: The initialization vector should be the same size as the block. In particular, the IV should be 8 bytes, except for the RC5 algorithm implemented with a 64-bit word, which requires a 16-byte IV, or the RC6 algorithm.

Key info types for keyObject in B_EncryptInit or B_DecryptInit:

Depends on cipher type, as follows:

Cipher	KIs
DES	KI_Item, KI_DES8, KI_DES8Strong, KI_8Byte
Triple DES	KI_Item, KI_DES24Strong, KI_24Byte
DESX	KI_Item, KI_DES24Strong, KI_24Byte
RC2	KI_Item, KI_8Byte
RC5	KI_Item, which gives the address and length of the RC5 Key.
RC6	KI_Item

C h a p t e r 2 A l g o r i t h m I n f o Ty p e s 89