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/*
* Create the FIDO2 report descriptor for a HID gadget
*
* Copyright (C) 2019 James.Bottomley@HansenPartnership.com
*
* SPDX-License-Identifier: GPL-2.0-only
*/
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
unsigned char report_desc[] = {
0x06, 0xd0, 0xf1, /* UsagePage(FIDO_USAGE_PAGE) */
0x09, 0x01, /* Usage(FIDO_USAGE_CTAPHID) */
0xa1, 0x01, /* Collection(Application) */
0x09, 0x20, /* Usage(FIDO_DATA_IN) */
0x19, 0x00, /* LogicalMin(0) */
0x29, 0xff, /* LogicalMax(FF) */
0x75, 0x08, /* ReportSize(8) */
0x95, 0x40, /* ReportCount(64) */
0x81, 0x02, /* Input(Data, Var, Abs) */
0x09, 0x21, /* Usage(FIDO_DATA_OUT) */
0x19, 0x00, /* LogicalMin(0) */
0x29, 0xff, /* LogicalMax(FF) */
0x75, 0x08, /* ReportSize(8) */
0x95, 0x40, /* ReportCount(64) */
0x91, 0x02, /* Output(Data, Var, Abs) */
0xc0, /* EndCollection */
};
int
main(int argc, char *argv[])
{
int fd;
printf("size is %ld\n", sizeof(report_desc));
if (argc != 2)
exit(0);
printf("writing file\n");
fd = open(argv[1], O_CREAT|O_TRUNC|O_WRONLY);
write (fd, report_desc, sizeof(report_desc));
return 0;
}
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