struct key_container* import_keys (const char* filename)
{
assert (NULL != filename);
FILE *fp;
const char *key = NULL;
struct key_container* keys = NULL;
const unsigned int SIZE_OF_256_BITS_ASCII = 64;
bool key_valid = true;
fp = fopen (filename, "r");
if (NULL != fp)
{
if (0 == parse_file (fp))
{
keys = make_key_container();
int x = 0;
for (x = 0; x < MAX_NUM_DATA_SLOTS && key_valid; x++)
{
key = get_key (x);
keys->keys[x] = ascii_hex_2_bin (key, SIZE_OF_256_BITS_ASCII);
if (NULL == keys->keys[x].ptr || 32 != keys->keys[x].len)
key_valid = false;
}
free_parsed_keys ();
}
fclose (fp);
}
return keys;
}
bool write_keys (int fd, struct key_container *keys,
struct octet_buffer *data_zone)
{
assert (NULL != data_zone);
assert (STATE_INITIALIZED == get_device_state (fd));
bool free_keys = false;
#define KEY_LEN 32
const unsigned int TEST_KEY_1 = 14;
const unsigned int TEST_KEY_2 = 15;
struct octet_buffer test_key_14 = make_buffer (KEY_LEN);
memset(test_key_14.ptr, 0xAA, KEY_LEN);
struct octet_buffer test_key_15 = make_buffer (KEY_LEN);
memset(test_key_15.ptr, 0xBB, KEY_LEN);
int x = 0;
/* If there are no keys, which is the case when we are personalizing
a device from scratch, create some new keys */
if (NULL == keys)
{
keys = make_key_container ();
for (x=0; x < get_max_keys (); x++)
{
if (TEST_KEY_1 == x)
{
keys->keys[x] = test_key_14;
}
else if (TEST_KEY_2 == x)
{
keys->keys[x] = test_key_15;
}
else
{
keys->keys[x] = get_random (fd, false);
}
}
free_keys = true;
}
bool status = true;
for (x=0; x < get_max_keys () && status; x++)
{
const unsigned int WORD_OFFSET = 8;
unsigned int addr = WORD_OFFSET * x;
status = write32 (fd, DATA_ZONE, addr, keys->keys[x], NULL);
}
if (status)
{
data_zone->len = get_max_keys () * keys->keys[0].len;
data_zone->ptr = malloc_wipe (data_zone->len);
for (x=0; x < get_max_keys (); x++)
{
CTX_LOG(DEBUG, "Writing key %u", x);
unsigned int offset = x * keys->keys[x].len;
memcpy(data_zone->ptr + offset, keys->keys[x].ptr, keys->keys[x].len);
}
status = record_keys (keys);
}
if (free_keys)
free_key_container (keys);
return status;
}