view libtomcrypt/src/modes/cfb/cfb_getiv.c @ 1938:77bc00dcc19f default tip main master

Bump version to 2022.82
author Matt Johnston <>
date Fri, 01 Apr 2022 14:43:27 +0800
parents 6dba84798cd5
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line source
/* 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


   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(len != NULL);
   LTC_ARGCHK(cfb != NULL);
   if ((unsigned long)cfb->blocklen > *len) {
      *len = cfb->blocklen;
   XMEMCPY(IV, cfb->IV, cfb->blocklen);
   *len = cfb->blocklen;

   return CRYPT_OK;


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