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_setiv.c
    CFB implementation, set IV, Tom St Denis
  */
  
  #ifdef LTC_CFB_MODE
  
  /**
     Set an initialization vector
     @param IV   The initialization vector
     @param len  The length of the vector (in octets)
     @param cfb  The CFB state
     @return CRYPT_OK if successful
  */
  int cfb_setiv(const unsigned char *IV, unsigned long len, symmetric_CFB *cfb)
  {
     int err;
  
     LTC_ARGCHK(IV  != NULL);
     LTC_ARGCHK(cfb != NULL);
  
     if ((err = cipher_is_valid(cfb->cipher)) != CRYPT_OK) {
         return err;
     }
  
     if (len != (unsigned long)cfb->blocklen) {
        return CRYPT_INVALID_ARG;
     }
  
     /* force next block */
     cfb->padlen = 0;
     return cipher_descriptor[cfb->cipher].ecb_encrypt(IV, cfb->IV, &cfb->key);
  }
  
  #endif
  
  
  /* ref:         $Format:%D$ */
  /* git commit:  $Format:%H$ */
  /* commit time: $Format:%ai$ */
  