static void block_init(block_state* self, unsigned char* key, int keylen)
{
int nr = 0;
switch (keylen) {
case 16: nr = 10; break;
case 24: nr = 12; break;
case 32: nr = 14; break;
default:
PyErr_SetString(PyExc_ValueError,
"AES key must be either 16, 24, or 32 bytes long");
return;
}
/* ensure that self->ek and self->dk are aligned to 16 byte boundaries */
void* tek = aligned_malloc_wrapper(16, (nr + 1) * sizeof(__m128i));
void* tdk = aligned_malloc_wrapper(16, (nr + 1) * sizeof(__m128i));
if (!tek || !tdk) {
aligned_free_wrapper(tek);
aligned_free_wrapper(tdk);
PyErr_SetString(PyExc_MemoryError,
"failed to allocate memory for keys");
return;
}
self->ek = tek;
self->dk = tdk;
self->rounds = nr;
aes_key_setup_enc(self->ek, key, keylen);
aes_key_setup_dec(self->dk, self->ek, nr);
}
static void block_init(block_state* self, unsigned char* key, int keylen)
{
int nr = 0;
switch (keylen) {
case 16: nr = 10; break;
case 24: nr = 12; break;
case 32: nr = 14; break;
default:
PyErr_SetString(PyExc_ValueError,
"AES key must be either 16, 24, or 32 bytes long");
return;
}
self->rounds = nr;
aes_key_setup_enc(self->ek, key, keylen);
aes_key_setup_dec(self->dk, self->ek, nr);
}
static int block_init(block_state* self, unsigned char* key, int keylen)
{
int nr = 0;
int offset;
switch (keylen) {
case 16: nr = 10; break;
case 24: nr = 12; break;
case 32: nr = 14; break;
default:
return ERR_NR_ROUNDS;
}
/* ensure that self->ek and self->dk are aligned to 16 byte boundaries */
offset = ALIGNMENT - ((uintptr_t)self->buffer & (ALIGNMENT-1));
self->ek = (__m128i*)((uint8_t*)self->buffer + offset);
self->dk = (__m128i*)((uint8_t*)self->ek + (MAXNR+1)*sizeof(__m128i));
self->rounds = nr;
aes_key_setup_enc(self->ek, key, keylen);
aes_key_setup_dec(self->dk, self->ek, nr);
return 0;
}