text: /* 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 ctr_getiv.c
     CTR implementation, get IV, Tom St Denis
  */
  
  #ifdef LTC_CTR_MODE
  
  /**
     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 ctr  The CTR state
     @return CRYPT_OK if successful
  */
  int ctr_getiv(unsigned char *IV, unsigned long *len, symmetric_CTR *ctr)
  {
     LTC_ARGCHK(IV  != NULL);
     LTC_ARGCHK(len != NULL);
     LTC_ARGCHK(ctr != NULL);
     if ((unsigned long)ctr->blocklen > *len) {
        *len = ctr->blocklen;
        return CRYPT_BUFFER_OVERFLOW;
     }
     XMEMCPY(IV, ctr->ctr, ctr->blocklen);
     *len = ctr->blocklen;
  
     return CRYPT_OK;
  }
  
  #endif
  
  /* $Source$ */
  /* $Revision: 24838 $ */
  /* $Date: 2007-01-23 23:16:57 -0600 (Tue, 23 Jan 2007) $ */
  