Function decrypt_path

libcppcryptfs/filename/cryptfilename.cpp:488–607

}

const WCHAR * // get decrypted path (used only in reverse mode)
decrypt_path(CryptContext *con, const WCHAR *path, wstring& storage)
{
	const WCHAR *rval = NULL;

	HANDLE hFind = NULL;

	CryptConfig *config = con->GetConfig();

	bool done = false;

	try {

		if (!config->m_reverse)
			throw(-1);

		storage = config->GetBaseDir();

		if (config->m_PlaintextNames || (path[0] == '\\' && path[1] == '\0')) {

			storage += path;

		} else {

			KeyDecryptor kdc(&config->m_keybuf_manager);

			// we can short-circuit the process in the case where the final file or dir is a long file name
			// and it is found in the long file name (lfn) cache

			const WCHAR *last_elem = wcsrchr(path, '\\');

			if (last_elem) {
				last_elem++;
				if (is_long_name(last_elem)) {
					wstring base64_hash;
					if (!extract_lfn_base64_hash(&last_elem[0], base64_hash)) {
						throw(-1);
					}
					wstring lfn_path;
					if (con->m_lfn_cache.lookup(&base64_hash[0], &storage, NULL)) {
						done = true;
					}
				}
			}

	

			if (!done) {

				wstring diriv_path = L"";

				if (*path && path[0] == '\\') {
					storage.push_back('\\');
					path++;
				}

				const TCHAR *p = path;