view libtomcrypt/src/modes/ofb/ofb_getiv.c @ 285:1b9e69c058d2

propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) to branch 'au.asn.ucc.matt.dropbear' (head fdf4a7a3b97ae5046139915de7e40399cceb2c01)
author Matt Johnston <matt@ucc.asn.au>
date Wed, 08 Mar 2006 13:23:58 +0000
parents
children 0cbe8f6dbf9e
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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], http://libtomcrypt.org
 */
#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(IV  != NULL);
   LTC_ARGCHK(len != NULL);
   LTC_ARGCHK(ofb != NULL);
   if ((unsigned long)ofb->blocklen > *len) {
      return CRYPT_BUFFER_OVERFLOW;
   }
   XMEMCPY(IV, ofb->IV, ofb->blocklen);
   *len = ofb->blocklen;

   return CRYPT_OK;
}

#endif

/* $Source: /cvs/libtom/libtomcrypt/src/modes/ofb/ofb_getiv.c,v $ */
/* $Revision: 1.3 $ */
/* $Date: 2005/05/05 14:35:59 $ */