C++ (Cpp) blf_cbc_decrypt Examples

Example #1

File: vnd.c Project: orumin/openbsd-efivars

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++;
	}
}

Example #2

File: internal.c Project: berkeley-cs186/course-fa07

static int
bf_decrypt(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_decrypt(&cx->ctx.bf, res, dlen);
			break;
		case MODE_CBC:
			blf_cbc_decrypt(&cx->ctx.bf, cx->iv, res, dlen);
			memcpy(cx->iv, data + dlen - 8, 8);
	}
	return 0;
}