1 /* $OpenBSD: fido.c,v 1.7 2024/12/30 02:46:00 guenther Exp $ */
2
3 /*
4 * Copyright (c) 2019 Reyk Floeter <reyk@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include "fido.h"
20
21 #include <sys/param.h>
22 #include <sys/systm.h>
23 #include <sys/device.h>
24 #include <sys/ioctl.h>
25 #include <sys/conf.h>
26 #include <sys/tty.h>
27
28 #include <dev/usb/usb.h>
29 #include <dev/usb/usbhid.h>
30
31 #include <dev/usb/usbdi.h>
32
33 #include <dev/usb/uhidev.h>
34 #include <dev/usb/uhid.h>
35
36 int fido_match(struct device *, void *, void *);
37
38 struct cfdriver fido_cd = {
39 NULL, "fido", DV_DULL
40 };
41
42 const struct cfattach fido_ca = {
43 sizeof(struct uhid_softc),
44 fido_match,
45 uhid_attach,
46 uhid_detach,
47 };
48
49 int
fido_match(struct device * parent,void * match,void * aux)50 fido_match(struct device *parent, void *match, void *aux)
51 {
52 struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)aux;
53 int size;
54 void *desc;
55 int ret = UMATCH_NONE;
56
57 if (UHIDEV_CLAIM_MULTIPLE_REPORTID(uha))
58 return (ret);
59
60 /* Find the FIDO usage page and U2F collection */
61 uhidev_get_report_desc(uha->parent, &desc, &size);
62 if (hid_is_collection(desc, size, uha->reportid,
63 HID_USAGE2(HUP_FIDO, HUF_U2FHID)))
64 ret = UMATCH_IFACECLASS;
65
66 return (ret);
67 }
68
69 int
fidoopen(dev_t dev,int flag,int mode,struct proc * p)70 fidoopen(dev_t dev, int flag, int mode, struct proc *p)
71 {
72 return (uhid_do_open(dev, flag, mode, p));
73 }
74
75 int
fidoioctl(dev_t dev,u_long cmd,caddr_t addr,int flag,struct proc * p)76 fidoioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
77 {
78 int error;
79
80 switch (cmd) {
81 case FIOASYNC:
82 case USB_GET_DEVICEINFO:
83 break;
84 default:
85 /*
86 * Users don't need USB/HID ioctl access to fido(4) devices
87 * but it can still be useful for debugging by root.
88 */
89 if ((error = suser(p)) != 0)
90 return (error);
91 break;
92 }
93
94 return (uhidioctl(dev, cmd, addr, flag, p));
95 }
96