void setup()
{
// Set up serial port for debugging
Serial.begin(9600);
while (!Serial)
{
; // wait for serial port to connect. Needed for Leonardo only
}
// Fullfil the data array
createDataArray();
// Read and set the key from the EEPROM
readKey(KEYLENGTH);
// Inicialization of the key
time = micros(); // time start
aes192_init(key, &key_init);
emit = micros(); // time start
Serial.print(F("Inicialisation total takes: "));
Serial.print(emit - time);
Serial.println(F(" [us]"));
// initialize the digital pin as an output.
// Pin 13 has an LED connected on most Arduino boards:
pinMode(ledPin, OUTPUT);
}
uint8_t WaspAES::init(char* Password, uint16_t keySize){
uint8_t* key;
// Key Initialition
switch(keySize){
case 128:
key = (uint8_t*) calloc(16,sizeof(uint8_t));
if (strlen(Password) < 17) {
for (uint16_t i=0; i < strlen(Password);i++){
key[i] = Password[i];
}
if (strlen(Password) < 16){
for(int aux = strlen(Password); aux < 16; aux++){
key[aux] = 0;
}
}
}
aes128_init(key, &ctx128);
break;
case 192:
key = (uint8_t*) calloc(24,sizeof(uint8_t));
if (strlen(Password) < 25) {
for (uint16_t i = 0; i < strlen(Password);i++){
key[i] = Password[i];
}
if (strlen(Password) < 24){
for(int aux = strlen(Password); aux < 24; aux++){
key[aux] = 0;
}
}
}
aes192_init(key, &ctx192);
break;
case 256:
key = (uint8_t*) calloc(32,sizeof(uint8_t));
if (strlen(Password) < 33) {
for (uint16_t i = 0; i < strlen(Password);i++){
key[i] = Password[i];
}
if (strlen(Password) < 32){
for(int aux = strlen(Password); aux < 32; aux++){
key[aux] = 0;
}
}
}
aes256_init(key, &ctx256);
break;
default:
return 0;
}
return 1;
}
void testrun_testkey_aes192(void){
uint8_t key[24] = { 0x8e, 0x73, 0xb0, 0xf7,
0xda, 0x0e, 0x64, 0x52,
0xc8, 0x10, 0xf3, 0x2b,
0x80, 0x90, 0x79, 0xe5,
0x62, 0xf8, 0xea, 0xd2,
0x52, 0x2c, 0x6b, 0x7b};
aes192_ctx_t ctx;
uint8_t i;
memset(&ctx, 0, sizeof(aes192_ctx_t));
aes192_init(key, &ctx);
cli_putstr("\r\n\r\n keyschedule test (FIPS 197):\r\n key: ");
cli_hexdump(key, 24);
for(i=0; i<13; ++i){
cli_putstr("\r\n index: ");
cli_putc('0'+i/10);
cli_putc('0'+i%10);
cli_putstr(" roundkey ");
cli_hexdump(ctx.key[i].ks, 16);
}
}
/*
* init
*
* This function sets up the password filling with zeros until it reacehs the
* proper length depending on the 'keySize'. The possibilities are 128bits,
* 192bits and 256bits.
*
* After padding with zeros, then an initialization function is called in order
* to create all the round keys which are stored in the proper context struct
*
*/
uint8_t WaspAES::init(char* password, uint16_t keySize)
{
uint8_t key[32];
memset( key, 0x00, sizeof(key) );
// Key Initialition with ZEROS until the proper length
switch(keySize)
{
case 128:
// key size to be used: 16 Bytes
if (strlen(password) < 17)
{
for (uint16_t i=0; i < strlen(password);i++)
{
key[i] = password[i];
}
if (strlen(password) < 16)
{
for(int aux = strlen(password); aux < 16; aux++)
{
key[aux] = 0;
}
}
}
// Once the password is padded with zeros
// generate the round keys from the 128 bit key
aes128_init(key, &ctx128);
break;
case 192:
// key size to be used: 24 Bytes
if (strlen(password) < 25)
{
for (uint16_t i = 0; i < strlen(password);i++)
{
key[i] = password[i];
}
if (strlen(password) < 24)
{
for(int aux = strlen(password); aux < 24; aux++)
{
key[aux] = 0;
}
}
}
// Once the password is padded with zeros
// generate the round keys from the 192 bit key
aes192_init(key, &ctx192);
break;
case 256:
// key size to be used: 32 Bytes
if (strlen(password) < 33)
{
for (uint16_t i = 0; i < strlen(password);i++)
{
key[i] = password[i];
}
if (strlen(password) < 32)
{
for(int aux = strlen(password); aux < 32; aux++)
{
key[aux] = 0;
}
}
}
// Once the password is padded with zeros
// generate the round keys from the 256 bit key
aes256_init(key, &ctx256);
break;
default:
return 0;
}
return 1;
}
