/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */
#include "tomcrypt_private.h"
/**
@file cbc_getiv.c
CBC implementation, get IV, Tom St Denis
*/
#ifdef LTC_CBC_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 cbc The CBC state
@return CRYPT_OK if successful
*/
int cbc_getiv(unsigned char *IV, unsigned long *len, const symmetric_CBC *cbc)
{
LTC_ARGCHK(IV != NULL);
LTC_ARGCHK(len != NULL);
LTC_ARGCHK(cbc != NULL);
if ((unsigned long)cbc->blocklen > *len) {
*len = cbc->blocklen;
return CRYPT_BUFFER_OVERFLOW;
}
XMEMCPY(IV, cbc->IV, cbc->blocklen);
*len = cbc->blocklen;
return CRYPT_OK;
}
#endif