How to check the integrity of a ZIP archive (specifically an Office Open XML file) programmatically (in C or C++)?

Question

Programming

Good afternoon!
Sometimes it happens that part of a file in the Office Open XML format (docx, pptx, xslx) breaks. It is known that these files are essentially ZIP archives (perhaps with a special compression algorithm?).
We need a library (preferably with a C/C++ example) that can check (not unpack) the integrity of this ZIP archive, that is, check the CRC checksum of the contents of the archive.

Answer 1

Used the miniz library and example2

BOOL isZipCorrect(const char *pFilename) {
  int ci;
  void *p;
  size_t uncomp_size;
  mz_bool status;
  mz_zip_archive zip_archive;

  // open the archive.
  memset(&zip_archive, 0, sizeof(zip_archive));
  status = mz_zip_reader_init_file(&zip_archive, pFilename, 0);
  if (!status) {
      return FALSE;
  }
  
  // go throw all files
  for (ci = 0; ci < (int)mz_zip_reader_get_num_files(&zip_archive); ci++) {
    // get information about each file in the archive
    mz_zip_archive_file_stat file_stat;
    if (!mz_zip_reader_file_stat(&zip_archive, ci, &file_stat))
    {
      mz_zip_reader_end(&zip_archive);
      return FALSE;
    }

    // try to extract this file
    p = mz_zip_reader_extract_file_to_heap(&zip_archive, file_stat.m_filename, &uncomp_size, 0);
    if (!p)
    {
      mz_zip_reader_end(&zip_archive);
      return FALSE;
    }
    
    // we're done.
    mz_free(p);
  }

  // close the archive, freeing any resources it was using
  mz_zip_reader_end(&zip_archive);

  // return ok state
  return TRUE;
}

Answer 2

In theory, if this is a renamed zip file, then any console archiver that has the "check archive integrity" command will do.

Answer 3

files are essentially ZIP archives

google