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.
   */
  #include "tomcrypt.h"
  
  /**
     @file cfb_getiv.c
     CFB implementation, get IV, Tom St Denis
  */
  
  #ifdef LTC_CFB_MODE
  
  /**
     Get the current initialization vector
     @param IV   [out] The destination of the initialization vector
     @param len  [in/out]  The max size and resulting size of the initialization vector
     @param cfb  The CFB state
     @return CRYPT_OK if successful
  */
  int cfb_getiv(unsigned char *IV, unsigned long *len, symmetric_CFB *cfb)
  {
     LTC_ARGCHK(IV  != NULL);
     LTC_ARGCHK(len != NULL);
     LTC_ARGCHK(cfb != NULL);
     if ((unsigned long)cfb->blocklen > *len) {
        *len = cfb->blocklen;
        return CRYPT_BUFFER_OVERFLOW;
     }
     XMEMCPY(IV, cfb->IV, cfb->blocklen);
     *len = cfb->blocklen;
  
     return CRYPT_OK;
  }
  
  #endif
  
  /* ref:         HEAD -> master, tag: v1.18.0 */
  /* git commit:  0676c9aec7299f5c398d96cbbb64f7e38f67d73f */
  /* commit time: 2017-10-10 15:51:36 +0200 */
  