static int
camellia_set_key(struct crypto_tfm *tfm, const u8 *in_key,
unsigned int key_len)
{
struct camellia_ctx *cctx = crypto_tfm_ctx(tfm);
const unsigned char *key = (const unsigned char *)in_key;
u32 *flags = &tfm->crt_flags;
if (key_len != 16 && key_len != 24 && key_len != 32) {
*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
return -EINVAL;
}
cctx->key_length = key_len;
switch (key_len) {
case 16:
camellia_setup128(key, cctx->key_table);
break;
case 24:
camellia_setup192(key, cctx->key_table);
break;
case 32:
camellia_setup256(key, cctx->key_table);
break;
}
return 0;
}
int Camellia_set_key(const unsigned char *userKey, const int bits,
CAMELLIA_KEY *key)
{
if (!userKey || !key)
{
return -1;
}
switch(bits)
{
case 128:
camellia_setup128(userKey, (unsigned int *)key->rd_key);
key->enc = camellia_encrypt128;
key->dec = camellia_decrypt128;
break;
case 192:
camellia_setup192(userKey, (unsigned int *)key->rd_key);
key->enc = camellia_encrypt256;
key->dec = camellia_decrypt256;
break;
case 256:
camellia_setup256(userKey, (unsigned int *)key->rd_key);
key->enc = camellia_encrypt256;
key->dec = camellia_decrypt256;
break;
default:
return -2;
}
key->bitLength = bits;
return 0;
}
static void camellia_setup192(const unsigned char *key, u32 *subkey)
{
unsigned char kk[32];
u32 krll, krlr, krrl, krrr;
memcpy(kk, key, 24);
memcpy((unsigned char *)&krll, key+16, 4);
memcpy((unsigned char *)&krlr, key+20, 4);
krrl = ~krll;
krrr = ~krlr;
memcpy(kk+24, (unsigned char *)&krrl, 4);
memcpy(kk+28, (unsigned char *)&krrr, 4);
camellia_setup256(kk, subkey);
}
void
Camellia_Ekeygen(const int keyBitLength,
const unsigned char *rawKey,
uint32_t *subkey)
{
KASSERT(keyBitLength == 128 || keyBitLength == 192 || keyBitLength == 256,
("Invalid key size (%d).", keyBitLength));
switch(keyBitLength) {
case 128:
camellia_setup128(rawKey, subkey);
break;
case 192:
camellia_setup192(rawKey, subkey);
break;
case 256:
camellia_setup256(rawKey, subkey);
break;
default:
break;
}
}