void
vndencrypt(struct vnd_softc *sc, caddr_t addr, size_t size, daddr_t off,
int encrypt)
{
int i, bsize;
u_char iv[8];
bsize = dbtob(1);
for (i = 0; i < size/bsize; i++) {
memset(iv, 0, sizeof(iv));
memcpy(iv, &off, sizeof(off));
blf_ecb_encrypt(sc->sc_keyctx, iv, sizeof(iv));
if (encrypt)
blf_cbc_encrypt(sc->sc_keyctx, iv, addr, bsize);
else
blf_cbc_decrypt(sc->sc_keyctx, iv, addr, bsize);
addr += bsize;
off++;
}
}
static int
bf_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
{
struct int_ctx *cx = (struct int_ctx *) c->ptr;
if (dlen == 0)
return 0;
if (dlen & 7)
return PXE_NOTBLOCKSIZE;
memcpy(res, data, dlen);
switch (cx->mode)
{
case MODE_ECB:
blf_ecb_encrypt(&cx->ctx.bf, res, dlen);
break;
case MODE_CBC:
blf_cbc_encrypt(&cx->ctx.bf, cx->iv, res, dlen);
memcpy(cx->iv, res + dlen - 8, 8);
}
return 0;
}