view src/modes/ofb/ofb_getiv.c @ 191:1c15b283127b libtomcrypt-orig

Import of libtomcrypt 1.02 with manual path rename rearrangement etc
author Matt Johnston <>
date Fri, 06 May 2005 13:23:02 +0000
children 39d5d58461d6
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/* 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, [email protected],
#include "tomcrypt.h"

   @file ofb_getiv.c
   OFB implementation, get IV, Tom St Denis

#ifdef OFB

   Get the current initial vector
   @param IV   [out] The destination of the initial vector
   @param len  [in/out]  The max size and resulting size of the initial vector
   @param ofb  The OFB state
   @return CRYPT_OK if successful
int ofb_getiv(unsigned char *IV, unsigned long *len, symmetric_OFB *ofb)
   LTC_ARGCHK(len != NULL);
   LTC_ARGCHK(ofb != NULL);
   if ((unsigned long)ofb->blocklen > *len) {
   XMEMCPY(IV, ofb->IV, ofb->blocklen);
   *len = ofb->blocklen;

   return CRYPT_OK;