/* 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@gmail.com, http://libtomcrypt.com */#include "tomcrypt.h"/**   @file ofb_setiv.c   OFB implementation, set IV, Tom St Denis*/#ifdef LTC_OFB_MODE/**   Set an initial vector   @param IV   The initial vector   @param len  The length of the vector (in octets)   @param ofb  The OFB state   @return CRYPT_OK if successful*/int ofb_setiv(const unsigned char *IV, unsigned long len, symmetric_OFB *ofb){   int err;   LTC_ARGCHK(IV  != NULL);   LTC_ARGCHK(ofb != NULL);   if ((err = cipher_is_valid(ofb->cipher)) != CRYPT_OK) {       return err;   }   if (len != (unsigned long)ofb->blocklen) {      return CRYPT_INVALID_ARG;   }   /* force next block */   ofb->padlen = 0;   return cipher_descriptor[ofb->cipher].ecb_encrypt(IV, ofb->IV, &ofb->key);}#endif /* $Source: /cvs/libtom/libtomcrypt/src/modes/ofb/ofb_setiv.c,v $ *//* $Revision: 1.6 $ *//* $Date: 2006/06/29 01:51:34 $ */