86 lines
2.2 KiB
C++
Vendored
86 lines
2.2 KiB
C++
Vendored
/*
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* TAR format fuzzer for libarchive
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* Tests all TAR variants: ustar, pax, gnutar, v7, oldgnu
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*/
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#include <stddef.h>
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#include <stdint.h>
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#include <vector>
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#include "archive.h"
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#include "archive_entry.h"
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#include "fuzz_helpers.h"
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static constexpr size_t kMaxInputSize = 512 * 1024;
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len) {
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if (len == 0 || len > kMaxInputSize) {
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return 0;
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}
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struct archive *a = archive_read_new();
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if (a == NULL) {
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return 0;
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}
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archive_read_support_format_tar(a);
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archive_read_support_format_gnutar(a);
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archive_read_support_filter_all(a);
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// Enable various TAR options
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archive_read_set_options(a, "tar:read_concatenated_archives,tar:mac-ext");
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Buffer buffer = {buf, len, 0};
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if (archive_read_open(a, &buffer, NULL, reader_callback, NULL) != ARCHIVE_OK) {
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archive_read_free(a);
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return 0;
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}
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std::vector<uint8_t> data_buffer(4096, 0);
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struct archive_entry *entry;
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while (archive_read_next_header(a, &entry) == ARCHIVE_OK) {
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// Exercise all metadata accessors
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archive_entry_pathname(entry);
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archive_entry_pathname_w(entry);
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archive_entry_size(entry);
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archive_entry_mtime(entry);
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archive_entry_atime(entry);
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archive_entry_ctime(entry);
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archive_entry_mode(entry);
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archive_entry_uid(entry);
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archive_entry_gid(entry);
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archive_entry_uname(entry);
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archive_entry_gname(entry);
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archive_entry_symlink(entry);
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archive_entry_hardlink(entry);
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archive_entry_rdev(entry);
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archive_entry_devmajor(entry);
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archive_entry_devminor(entry);
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// Test sparse file handling
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archive_entry_sparse_reset(entry);
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int64_t offset, length;
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while (archive_entry_sparse_next(entry, &offset, &length) == ARCHIVE_OK) {
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(void)offset;
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(void)length;
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}
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// Test xattr handling
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archive_entry_xattr_reset(entry);
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const char *name;
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const void *value;
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size_t size;
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while (archive_entry_xattr_next(entry, &name, &value, &size) == ARCHIVE_OK) {
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(void)name;
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(void)value;
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(void)size;
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}
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ssize_t r;
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while ((r = archive_read_data(a, data_buffer.data(), data_buffer.size())) > 0)
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;
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}
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archive_read_free(a);
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return 0;
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}
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