#ifndef __SQCFB_H#define __SQCFB_H/*	Cipher Feedback (CFB) mode support	IMPORTANT REMARK: input buffers to the encryption/decryption functions	must be word-aligned on machines which have this as a requirement.*/#include "square.h"typedef struct {	squareKeySchedule roundKeys;	squareBlock mask;	unsigned avail; /* number of available mask bytes */ } squareCfbContext;void squareCfbInit    (squareCfbContext *ctxCfb, const squareBlock key);void squareCfbSetIV   (squareCfbContext *ctxCfb, const squareBlock iv);void squareCfbEncrypt (squareCfbContext *ctxCfb, byte *buffer, unsigned length);void squareCfbDecrypt (squareCfbContext *ctxCfb, byte *buffer, unsigned length);void squareCfbFinal   (squareCfbContext *ctxCfb);#endif /* __SQCFB_H */