solo1/ctap_device.c

84 wiersze
1.3 KiB
C

/*
* Device specific functionality defined here
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "cbor.h"
#include "util.h"
#include "usbhid.h"
void ctap_write_block(uint8_t * data)
{
printf("<< "); dump_hex(data, 64);
usbhid_send(data);
}
void ctap_write(void * _data, int len)
{
static uint8_t buf[HID_MESSAGE_SIZE];
static int offset = 0;
uint8_t * data = (uint8_t *) _data;
if (len == 0)
{
if (offset > 0)
{
memset(buf + offset, 0, HID_MESSAGE_SIZE - offset);
ctap_write_block(buf);
}
offset = 0;
return;
}
else if (len == -1)
{
memset(buf, 0, HID_MESSAGE_SIZE);
offset = 0;
}
int i;
for (i = 0; i < len; i++)
{
buf[offset++] = data[i];
if (offset == HID_MESSAGE_SIZE)
{
ctap_write_block(buf);
offset = 0;
}
}
}
int ctap_user_presence_test()
{
return 1;
}
int ctap_user_verification(uint8_t arg)
{
return 1;
}
uint32_t ctap_atomic_count()
{
static uint32_t counter = 25;
return counter++;
}
int ctap_generate_rng(uint8_t * dst, size_t num)
{
FILE * urand = fopen("/dev/urandom","r");
if (urand == NULL)
{
perror("fopen");
exit(1);
}
fread(dst, 1, num, urand);
fclose(urand);
}