Syntax
static const unsigned char aes_256_subkeys[2][MBEDTLS_AES_BLOCK_SIZE] = {
{
0xca, 0xd1, 0xed, 0x03, 0x29, 0x9e, 0xed, 0xac,
0x2e, 0x9a, 0x99, 0x80, 0x86, 0x21, 0x50, 0x2f
},
{
0x95, 0xa3, 0xda, 0x06, 0x53, 0x3d, 0xdb, 0x58,
0x5d, 0x35, 0x33, 0x01, 0x0c, 0x42, 0xa0, 0xd9
}
};