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/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <dlfcn.h>
#include <nfa_rw_int.h>
#include <nfc_int.h>
#include <rw_int.h>
#include <stdlib.h>
#include "../includes/common.h"
#define LENGTH 0xBEB
extern tRW_CB rw_cb;
extern tNFC_CB nfc_cb;
void rw_init(void);
void NFA_Init(tHAL_NFC_ENTRY *p_hal_entry_tbl);
bool nfa_rw_activate_ntf(tNFA_RW_MSG *p_data);
bool isInitialized = false;
static void *(*real_memcpy)(void *to, const void *from, size_t numBytes) = nullptr;
void init(void) {
real_memcpy = (void *(*)(void *, const void *, size_t))dlsym(RTLD_NEXT, "memcpy");
if (real_memcpy == nullptr) {
return;
}
isInitialized = true;
}
void *memcpy(void *to, const void *from, size_t numBytes) {
if (!isInitialized) {
init();
}
if (numBytes == LENGTH) {
exit(EXIT_VULNERABLE);
}
return real_memcpy(to, from, numBytes);
}
int freeResourcesAndReturn(int status, tNFA_RW_MSG *ptr1 = nullptr,
tNFC_ACTIVATE_DEVT *ptr2 = nullptr, tRW_DATA *ptr3 = nullptr,
NFC_HDR *ptr4 = nullptr, uint8_t *ptr5 = nullptr) {
if (ptr1) {
if (ptr2) {
free(ptr2);
}
free(ptr1);
}
if (ptr3) {
if (ptr4) {
free(ptr4);
}
free(ptr3);
}
if (ptr5) {
free(ptr5);
}
return status;
}
int main() {
GKI_init();
rw_init();
tHAL_NFC_ENTRY p_hal_entry_tbl;
NFA_Init(&p_hal_entry_tbl);
tNFA_RW_MSG *p_data = (tNFA_RW_MSG *)malloc(sizeof(tNFA_RW_MSG));
if (!p_data) {
return EXIT_FAILURE;
}
p_data->activate_ntf.p_activate_params =
(tNFC_ACTIVATE_DEVT *)malloc(sizeof(tNFC_ACTIVATE_DEVT));
if (!(p_data->activate_ntf.p_activate_params)) {
return freeResourcesAndReturn(EXIT_FAILURE, p_data);
}
tNFC_ACTIVATE_DEVT *p_activate_params = p_data->activate_ntf.p_activate_params;
p_activate_params->protocol = NFC_PROTOCOL_T2T;
nfa_rw_activate_ntf(p_data);
tRW_CBACK *p_cback = rw_cb.p_cback;
tRW_DATA *p_rw_data = (tRW_DATA *)malloc(sizeof(tRW_DATA));
if (!p_rw_data) {
return freeResourcesAndReturn(EXIT_FAILURE, p_data, p_data->activate_ntf.p_activate_params);
}
nfa_rw_cb.cur_op = NFA_RW_OP_READ_NDEF;
p_rw_data->data.p_data = (NFC_HDR *)malloc(sizeof(NFC_HDR));
if (!(p_rw_data->data.p_data)) {
return freeResourcesAndReturn(EXIT_FAILURE, p_data, p_data->activate_ntf.p_activate_params,
p_rw_data);
}
nfa_rw_cb.p_ndef_buf = (uint8_t *)malloc(sizeof(uint8_t));
if (!(nfa_rw_cb.p_ndef_buf)) {
return freeResourcesAndReturn(EXIT_FAILURE, p_data, p_data->activate_ntf.p_activate_params,
p_rw_data, p_rw_data->data.p_data);
}
p_rw_data->data.p_data->len = LENGTH;
if (p_cback) {
p_cback(RW_T3T_CHECK_EVT, p_rw_data);
}
return freeResourcesAndReturn(EXIT_SUCCESS, p_data, p_data->activate_ntf.p_activate_params,
p_rw_data, p_rw_data->data.p_data, nfa_rw_cb.p_ndef_buf);
}
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