39 lines
833 B
C
39 lines
833 B
C
/* 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.
|
|
*
|
|
* Tom St Denis, tomstdenis@iahu.ca, http://libtomcrypt.org
|
|
*/
|
|
|
|
#include "mycrypt.h"
|
|
|
|
#ifdef OFB
|
|
|
|
int ofb_setiv(const unsigned char *IV, unsigned long len, symmetric_OFB *ofb)
|
|
{
|
|
int err;
|
|
|
|
_ARGCHK(IV != NULL);
|
|
_ARGCHK(ofb != NULL);
|
|
|
|
if ((err = cipher_is_valid(ofb->cipher)) != CRYPT_OK) {
|
|
return err;
|
|
}
|
|
|
|
if (len != (unsigned long)ofb->blocklen) {
|
|
return CRYPT_INVALID_ARG;
|
|
}
|
|
|
|
/* force next block */
|
|
ofb->padlen = 0;
|
|
cipher_descriptor[ofb->cipher].ecb_encrypt(IV, ofb->IV, &ofb->key);
|
|
return CRYPT_OK;
|
|
}
|
|
|
|
#endif
|
|
|