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/*
* Copyright (c) 2019 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.
*/
#include <assert.h>
#include <fido.h>
#include <string.h>
#include "../fuzz/wiredata_fido2.h"
#define FAKE_DEV_HANDLE ((void *)0xdeadbeef)
#define REPORT_LEN (64 + 1)
static uint8_t ctap_nonce[8];
static uint8_t *wiredata_ptr;
static size_t wiredata_len;
static int initialised;
static void *
dummy_open(const char *path)
{
(void)path;
return (FAKE_DEV_HANDLE);
}
static void
dummy_close(void *handle)
{
assert(handle == FAKE_DEV_HANDLE);
}
static int
dummy_read(void *handle, unsigned char *ptr, size_t len, int ms)
{
size_t n;
(void)ms;
assert(handle == FAKE_DEV_HANDLE);
assert(ptr != NULL);
assert(len == REPORT_LEN - 1);
if (wiredata_ptr == NULL)
return (-1);
if (!initialised) {
assert(wiredata_len >= REPORT_LEN - 1);
memcpy(&wiredata_ptr[7], &ctap_nonce, sizeof(ctap_nonce));
initialised = 1;
}
if (wiredata_len < len)
n = wiredata_len;
else
n = len;
memcpy(ptr, wiredata_ptr, n);
wiredata_ptr += n;
wiredata_len -= n;
return ((int)n);
}
static int
dummy_write(void *handle, const unsigned char *ptr, size_t len)
{
assert(handle == FAKE_DEV_HANDLE);
assert(ptr != NULL);
assert(len == REPORT_LEN);
if (!initialised)
memcpy(&ctap_nonce, &ptr[8], sizeof(ctap_nonce));
return ((int)len);
}
static uint8_t *
wiredata_setup(const uint8_t *data, size_t len)
{
const uint8_t ctap_init_data[] = { WIREDATA_CTAP_INIT };
assert(wiredata_ptr == NULL);
assert(SIZE_MAX - len > sizeof(ctap_init_data));
assert((wiredata_ptr = malloc(sizeof(ctap_init_data) + len)) != NULL);
memcpy(wiredata_ptr, ctap_init_data, sizeof(ctap_init_data));
if (len)
memcpy(wiredata_ptr + sizeof(ctap_init_data), data, len);
wiredata_len = sizeof(ctap_init_data) + len;
return (wiredata_ptr);
}
static void
wiredata_clear(uint8_t **wiredata)
{
free(*wiredata);
*wiredata = NULL;
wiredata_ptr = NULL;
wiredata_len = 0;
initialised = 0;
}
/* gh#56 */
static void
open_iff_ok(void)
{
fido_dev_t *dev = NULL;
fido_dev_io_t io;
memset(&io, 0, sizeof(io));
io.open = dummy_open;
io.close = dummy_close;
io.read = dummy_read;
io.write = dummy_write;
assert((dev = fido_dev_new()) != NULL);
assert(fido_dev_set_io_functions(dev, &io) == FIDO_OK);
assert(fido_dev_open(dev, "dummy") == FIDO_ERR_RX);
assert(fido_dev_close(dev) == FIDO_ERR_INVALID_ARGUMENT);
fido_dev_free(&dev);
}
static void
reopen(void)
{
const uint8_t cbor_info_data[] = { WIREDATA_CTAP_CBOR_INFO };
uint8_t *wiredata;
fido_dev_t *dev = NULL;
fido_dev_io_t io;
memset(&io, 0, sizeof(io));
io.open = dummy_open;
io.close = dummy_close;
io.read = dummy_read;
io.write = dummy_write;
wiredata = wiredata_setup(cbor_info_data, sizeof(cbor_info_data));
assert((dev = fido_dev_new()) != NULL);
assert(fido_dev_set_io_functions(dev, &io) == FIDO_OK);
assert(fido_dev_open(dev, "dummy") == FIDO_OK);
assert(fido_dev_close(dev) == FIDO_OK);
wiredata_clear(&wiredata);
wiredata = wiredata_setup(cbor_info_data, sizeof(cbor_info_data));
assert(fido_dev_open(dev, "dummy") == FIDO_OK);
assert(fido_dev_close(dev) == FIDO_OK);
wiredata_clear(&wiredata);
}
static void
double_open(void)
{
const uint8_t cbor_info_data[] = { WIREDATA_CTAP_CBOR_INFO };
uint8_t *wiredata;
fido_dev_t *dev = NULL;
fido_dev_io_t io;
memset(&io, 0, sizeof(io));
io.open = dummy_open;
io.close = dummy_close;
io.read = dummy_read;
io.write = dummy_write;
wiredata = wiredata_setup(cbor_info_data, sizeof(cbor_info_data));
assert((dev = fido_dev_new()) != NULL);
assert(fido_dev_set_io_functions(dev, &io) == FIDO_OK);
assert(fido_dev_open(dev, "dummy") == FIDO_OK);
assert(fido_dev_open(dev, "dummy") == FIDO_ERR_INVALID_ARGUMENT);
assert(fido_dev_close(dev) == FIDO_OK);
wiredata_clear(&wiredata);
}
static void
is_fido2(void)
{
const uint8_t cbor_info_data[] = { WIREDATA_CTAP_CBOR_INFO };
uint8_t *wiredata;
fido_dev_t *dev = NULL;
fido_dev_io_t io;
memset(&io, 0, sizeof(io));
io.open = dummy_open;
io.close = dummy_close;
io.read = dummy_read;
io.write = dummy_write;
wiredata = wiredata_setup(cbor_info_data, sizeof(cbor_info_data));
assert((dev = fido_dev_new()) != NULL);
assert(fido_dev_set_io_functions(dev, &io) == FIDO_OK);
assert(fido_dev_open(dev, "dummy") == FIDO_OK);
assert(fido_dev_is_fido2(dev) == true);
assert(fido_dev_supports_pin(dev) == true);
fido_dev_force_u2f(dev);
assert(fido_dev_is_fido2(dev) == false);
assert(fido_dev_supports_pin(dev) == false);
assert(fido_dev_close(dev) == FIDO_OK);
wiredata_clear(&wiredata);
wiredata = wiredata_setup(NULL, 0);
assert(fido_dev_open(dev, "dummy") == FIDO_OK);
assert(fido_dev_is_fido2(dev) == false);
assert(fido_dev_supports_pin(dev) == false);
fido_dev_force_fido2(dev);
assert(fido_dev_is_fido2(dev) == true);
assert(fido_dev_supports_pin(dev) == false);
assert(fido_dev_close(dev) == FIDO_OK);
wiredata_clear(&wiredata);
}
static void
has_pin(void)
{
const uint8_t set_pin_data[] = {
WIREDATA_CTAP_CBOR_INFO,
WIREDATA_CTAP_CBOR_AUTHKEY,
WIREDATA_CTAP_CBOR_STATUS,
WIREDATA_CTAP_CBOR_STATUS
};
uint8_t *wiredata;
fido_dev_t *dev = NULL;
fido_dev_io_t io;
memset(&io, 0, sizeof(io));
io.open = dummy_open;
io.close = dummy_close;
io.read = dummy_read;
io.write = dummy_write;
wiredata = wiredata_setup(set_pin_data, sizeof(set_pin_data));
assert((dev = fido_dev_new()) != NULL);
assert(fido_dev_set_io_functions(dev, &io) == FIDO_OK);
assert(fido_dev_open(dev, "dummy") == FIDO_OK);
assert(fido_dev_has_pin(dev) == false);
assert(fido_dev_set_pin(dev, "top secret", NULL) == FIDO_OK);
assert(fido_dev_has_pin(dev) == true);
assert(fido_dev_reset(dev) == FIDO_OK);
assert(fido_dev_has_pin(dev) == false);
assert(fido_dev_close(dev) == FIDO_OK);
wiredata_clear(&wiredata);
}
int
main(void)
{
fido_init(0);
open_iff_ok();
reopen();
double_open();
is_fido2();
has_pin();
exit(0);
}
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