/* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, tomstdenis@iahu.ca, http://libtomcrypt.org */#include "mycrypt.h"#ifdef CFBint cfb_setiv(const unsigned char *IV, unsigned long len, symmetric_CFB *cfb){   int err;      _ARGCHK(IV  != NULL);   _ARGCHK(cfb != NULL);   if ((err = cipher_is_valid(cfb->cipher)) != CRYPT_OK) {       return err;   }      if (len != (unsigned long)cfb->blocklen) {      return CRYPT_INVALID_ARG;   }         /* force next block */   cfb->padlen = 0;   cipher_descriptor[cfb->cipher].ecb_encrypt(IV, cfb->IV, &cfb->key);   return CRYPT_OK;}#endif