35 lines
886 B
C
35 lines
886 B
C
/* 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->ecb.blocklen > *len) {
|
|
*len = cbc->ecb.blocklen;
|
|
return CRYPT_BUFFER_OVERFLOW;
|
|
}
|
|
XMEMCPY(IV, cbc->IV, cbc->ecb.blocklen);
|
|
*len = cbc->ecb.blocklen;
|
|
|
|
return CRYPT_OK;
|
|
}
|
|
|
|
#endif
|