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/*
* Copyright (c) 2021 Yubico AB. All rights reserved.
* Use of this source code is governed by a BSD-style
* license that can be found in the LICENSE file.
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <sys/types.h>
#include <linux/hidraw.h>
#include <linux/input.h>
#include <assert.h>
#include <errno.h>
#include <libudev.h>
#include <stdlib.h>
#include "mutator_aux.h"
struct udev {
int magic;
};
struct udev_enumerate {
int magic;
struct udev_list_entry *list_entry;
};
struct udev_list_entry {
int magic;
};
struct udev_device {
int magic;
struct udev_device *parent;
};
#define UDEV_MAGIC 0x584492cc
#define UDEV_DEVICE_MAGIC 0x569180dd
#define UDEV_LIST_ENTRY_MAGIC 0x497422ee
#define UDEV_ENUM_MAGIC 0x583570ff
#define ASSERT_TYPE(x, m) assert((x) != NULL && (x)->magic == (m))
#define ASSERT_UDEV(x) ASSERT_TYPE((x), UDEV_MAGIC)
#define ASSERT_UDEV_ENUM(x) ASSERT_TYPE((x), UDEV_ENUM_MAGIC)
#define ASSERT_UDEV_LIST_ENTRY(x) ASSERT_TYPE((x), UDEV_LIST_ENTRY_MAGIC)
#define ASSERT_UDEV_DEVICE(x) ASSERT_TYPE((x), UDEV_DEVICE_MAGIC)
static const char *uevent;
static const struct blob *report_descriptor;
struct udev *__wrap_udev_new(void);
struct udev_device *__wrap_udev_device_get_parent_with_subsystem_devtype(
struct udev_device *, const char *, const char *);
struct udev_device *__wrap_udev_device_new_from_syspath(struct udev *,
const char *);
struct udev_enumerate *__wrap_udev_enumerate_new(struct udev *);
struct udev_list_entry *__wrap_udev_enumerate_get_list_entry(
struct udev_enumerate *);
struct udev_list_entry *__wrap_udev_list_entry_get_next(
struct udev_list_entry *);
const char *__wrap_udev_device_get_sysattr_value(struct udev_device *,
const char *);
const char *__wrap_udev_list_entry_get_name(struct udev_list_entry *);
const char *__wrap_udev_device_get_devnode(struct udev_device *);
const char *__wrap_udev_device_get_sysnum(struct udev_device *);
int __wrap_udev_enumerate_add_match_subsystem(struct udev_enumerate *,
const char *);
int __wrap_udev_enumerate_scan_devices(struct udev_enumerate *);
int __wrap_ioctl(int, unsigned long , ...);
void __wrap_udev_device_unref(struct udev_device *);
void __wrap_udev_enumerate_unref(struct udev_enumerate *);
void __wrap_udev_unref(struct udev *);
void set_udev_parameters(const char *, const struct blob *);
struct udev_device *
__wrap_udev_device_get_parent_with_subsystem_devtype(struct udev_device *child,
const char *subsystem, const char *devtype)
{
ASSERT_UDEV_DEVICE(child);
fido_log_debug("%s", subsystem); /* XXX consume */
fido_log_debug("%s", devtype); /* XXX consume */
if (child->parent != NULL)
return child->parent;
if ((child->parent = calloc(1, sizeof(*child->parent))) == NULL)
return NULL;
child->parent->magic = UDEV_DEVICE_MAGIC;
return child->parent;
}
const char *
__wrap_udev_device_get_sysattr_value(struct udev_device *udev_device,
const char *sysattr)
{
ASSERT_UDEV_DEVICE(udev_device);
if (uniform_random(400) < 1)
return NULL;
if (!strcmp(sysattr, "manufacturer") || !strcmp(sysattr, "product"))
return "product info"; /* XXX randomise? */
else if (!strcmp(sysattr, "uevent"))
return uevent;
return NULL;
}
const char *
__wrap_udev_list_entry_get_name(struct udev_list_entry *entry)
{
ASSERT_UDEV_LIST_ENTRY(entry);
return uniform_random(400) < 1 ? NULL : "name"; /* XXX randomise? */
}
struct udev_device *
__wrap_udev_device_new_from_syspath(struct udev *udev, const char *syspath)
{
struct udev_device *udev_device;
ASSERT_UDEV(udev);
fido_log_debug("%s", syspath);
if ((udev_device = calloc(1, sizeof(*udev_device))) == NULL)
return NULL;
udev_device->magic = UDEV_DEVICE_MAGIC;
return udev_device;
}
const char *
__wrap_udev_device_get_devnode(struct udev_device *udev_device)
{
ASSERT_UDEV_DEVICE(udev_device);
return uniform_random(400) < 1 ? NULL : "/dev/zero";
}
const char *
__wrap_udev_device_get_sysnum(struct udev_device *udev_device)
{
ASSERT_UDEV_DEVICE(udev_device);
return uniform_random(400) < 1 ? NULL : "101010"; /* XXX randomise? */
}
void
__wrap_udev_device_unref(struct udev_device *udev_device)
{
ASSERT_UDEV_DEVICE(udev_device);
if (udev_device->parent) {
ASSERT_UDEV_DEVICE(udev_device->parent);
free(udev_device->parent);
}
free(udev_device);
}
struct udev *
__wrap_udev_new(void)
{
struct udev *udev;
if ((udev = calloc(1, sizeof(*udev))) == NULL)
return NULL;
udev->magic = UDEV_MAGIC;
return udev;
}
struct udev_enumerate *
__wrap_udev_enumerate_new(struct udev *udev)
{
struct udev_enumerate *udev_enum;
ASSERT_UDEV(udev);
if ((udev_enum = calloc(1, sizeof(*udev_enum))) == NULL)
return NULL;
udev_enum->magic = UDEV_ENUM_MAGIC;
return udev_enum;
}
int
__wrap_udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enum,
const char *subsystem)
{
ASSERT_UDEV_ENUM(udev_enum);
fido_log_debug("%s:", subsystem);
return uniform_random(400) < 1 ? -EINVAL : 0;
}
int
__wrap_udev_enumerate_scan_devices(struct udev_enumerate *udev_enum)
{
ASSERT_UDEV_ENUM(udev_enum);
return uniform_random(400) < 1 ? -EINVAL : 0;
}
struct udev_list_entry *
__wrap_udev_enumerate_get_list_entry(struct udev_enumerate *udev_enum)
{
ASSERT_UDEV_ENUM(udev_enum);
if ((udev_enum->list_entry = calloc(1,
sizeof(*udev_enum->list_entry))) == NULL)
return NULL;
udev_enum->list_entry->magic = UDEV_LIST_ENTRY_MAGIC;
return udev_enum->list_entry;
}
struct udev_list_entry *
__wrap_udev_list_entry_get_next(struct udev_list_entry *udev_list_entry)
{
ASSERT_UDEV_LIST_ENTRY(udev_list_entry);
return uniform_random(400) < 1 ? NULL : udev_list_entry;
}
void
__wrap_udev_enumerate_unref(struct udev_enumerate *udev_enum)
{
ASSERT_UDEV_ENUM(udev_enum);
if (udev_enum->list_entry)
ASSERT_UDEV_LIST_ENTRY(udev_enum->list_entry);
free(udev_enum->list_entry);
free(udev_enum);
}
void
__wrap_udev_unref(struct udev *udev)
{
ASSERT_UDEV(udev);
free(udev);
}
int
__wrap_ioctl(int fd, unsigned long request, ...)
{
va_list ap;
struct hidraw_report_descriptor *hrd;
(void)fd;
if (uniform_random(400) < 1) {
errno = EINVAL;
return -1;
}
va_start(ap, request);
switch (IOCTL_REQ(request)) {
case IOCTL_REQ(HIDIOCGRDESCSIZE):
*va_arg(ap, int *) = (int)report_descriptor->len;
break;
case IOCTL_REQ(HIDIOCGRDESC):
hrd = va_arg(ap, struct hidraw_report_descriptor *);
assert(hrd->size == report_descriptor->len);
memcpy(hrd->value, report_descriptor->body, hrd->size);
break;
default:
warnx("%s: unknown request 0x%lx", __func__, request);
abort();
}
va_end(ap);
return 0;
}
void
set_udev_parameters(const char *uevent_ptr,
const struct blob *report_descriptor_ptr)
{
uevent = uevent_ptr;
report_descriptor = report_descriptor_ptr;
}
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