160 lines
4.1 KiB
C
160 lines
4.1 KiB
C
/* Copyright 2020 Google Inc.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 <stdint.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <ftw.h>
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#define INCLUDED_BY_MAIN_MODULE 1
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#include "config.h"
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#include "gpg.h"
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#include "../common/types.h"
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#include "../common/iobuf.h"
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#include "keydb.h"
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#include "keyedit.h"
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#include "../common/util.h"
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#include "main.h"
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#include "call-dirmngr.h"
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#include "trustdb.h"
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/mount.h>
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static bool initialized = false;
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ctrl_t ctrlGlobal;
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int fd;
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char *filename;
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//hack not to include gpg.c which has main function
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int g10_errors_seen = 0;
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void
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g10_exit( int rc )
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{
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gcry_control (GCRYCTL_UPDATE_RANDOM_SEED_FILE);
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gcry_control (GCRYCTL_TERM_SECMEM );
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exit (rc);
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}
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static void
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gpg_deinit_default_ctrl (ctrl_t ctrl)
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{
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#ifdef USE_TOFU
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tofu_closedbs (ctrl);
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#endif
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gpg_dirmngr_deinit_session_data (ctrl);
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keydb_release (ctrl->cached_getkey_kdb);
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}
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static void
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my_gcry_logger (void *dummy, int level, const char *format, va_list arg_ptr)
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{
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return;
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}
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static int unlink_cb(const char *fpath, const struct stat *sb, int typeflag)
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{
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if (typeflag == FTW_F){
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unlink(fpath);
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}
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return 0;
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}
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static void rmrfdir(char *path)
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{
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ftw(path, unlink_cb, 16);
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if (rmdir(path) != 0) {
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printf("failed rmdir, errno=%d\n", errno);
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}
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}
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int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
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if (! initialized) {
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ctrlGlobal = (ctrl_t) malloc(sizeof(*ctrlGlobal));
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if (!ctrlGlobal) {
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exit(1);
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}
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//deletes previous tmp dir and (re)create it as a ramfs
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//system("umount /tmp/fuzzdirverify");
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rmrfdir("/tmp/fuzzdirverify");
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mkdir("/tmp/fuzzdirverify/", 0700);
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//system("mount -t tmpfs -o size=64M tmpfs /tmp/fuzzdirverify");
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filename=strdup("/tmp/fuzzdirverify/fuzz.gpg");
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if (!filename) {
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free(ctrlGlobal);
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return 0;
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}
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fd = open("/tmp/fuzzdirverify/fuzz.gpg", O_RDWR | O_CREAT, 0600);
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if (fd == -1) {
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free(ctrlGlobal);
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free(filename);
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return 0;
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}
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gnupg_set_homedir("/tmp/fuzzdirverify/");
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if (keydb_add_resource ("pubring" EXTSEP_S GPGEXT_GPG,
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KEYDB_RESOURCE_FLAG_DEFAULT) != GPG_ERR_NO_ERROR) {
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free(filename);
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free(ctrlGlobal);
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close(fd);
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return 0;
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}
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if (setup_trustdb (1, NULL) != GPG_ERR_NO_ERROR) {
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free(filename);
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free(ctrlGlobal);
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close(fd);
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return 0;
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}
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//populate /tmp/fuzzdirverify/ as homedir ~/.gnupg
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strlist_t sl = NULL;
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public_key_list (ctrlGlobal, sl, 0, 0);
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free_strlist(sl);
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//no output for stderr
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log_set_file("/dev/null");
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gcry_set_log_handler (my_gcry_logger, NULL);
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gnupg_initialize_compliance (GNUPG_MODULE_NAME_GPG);
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initialized = true;
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}
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memset(ctrlGlobal, 0, sizeof(*ctrlGlobal));
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ctrlGlobal->magic = SERVER_CONTROL_MAGIC;
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if (ftruncate(fd, Size) == -1) {
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return 0;
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}
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if (lseek (fd, 0, SEEK_SET) < 0) {
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return 0;
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}
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if (write (fd, Data, Size) != Size) {
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return 0;
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}
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verify_signatures(ctrlGlobal, 1, &filename);
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gpg_deinit_default_ctrl (ctrlGlobal);
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memset(ctrlGlobal, 0, sizeof(*ctrlGlobal));
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ctrlGlobal->magic = SERVER_CONTROL_MAGIC;
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verify_files(ctrlGlobal, 1, &filename);
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gpg_deinit_default_ctrl (ctrlGlobal);
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return 0;
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}
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