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