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85 lines
2.0 KiB
85 lines
2.0 KiB
/**
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* Copyright (C) 2020 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 <fcntl.h>
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#include <ipp.h>
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#include "../includes/common.h"
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int isInitialized = 0;
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void *check_ptr = NULL;
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size_t text_len = sizeof("text/plain") - 1;
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static void *(*real_malloc)(size_t) = NULL;
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static int (*real_strcmp)(const char *str1, const char *str2) = NULL;
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void init(void) {
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real_malloc = (void *(*)(size_t))dlsym(RTLD_NEXT, "malloc");
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if (real_malloc == NULL) {
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return;
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}
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real_strcmp = (int (*)(const char *, const char *))dlsym(RTLD_NEXT, "strcmp");
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if (real_strcmp == NULL) {
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return;
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}
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isInitialized = 1;
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}
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void *malloc(size_t size) {
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if (!isInitialized) {
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init();
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}
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void *tmp = real_malloc(size);
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if (size == text_len) {
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check_ptr = tmp;
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}
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return tmp;
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}
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int strcmp(const char *str1, const char *str2) {
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if (!isInitialized) {
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init();
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}
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if ((str1 == check_ptr) && (str1[text_len - 1] != '\0')) {
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exit(EXIT_VULNERABLE);
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}
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return real_strcmp(str1, str2);
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}
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int main(int argc, char **argv) {
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if (argc < 2) {
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return EXIT_FAILURE;
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}
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int file_desc = open((const char *)argv[1], O_RDONLY);
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if (file_desc < 0) {
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return EXIT_FAILURE;
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}
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ipp_t *job = ippNew();
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if (!job) {
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return EXIT_FAILURE;
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}
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ippReadFile(file_desc, job);
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if (job) {
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free(job);
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}
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close(file_desc);
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return EXIT_SUCCESS;
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}
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