diff --git a/OfficeCryptReader/Test/Test.cpp b/OfficeCryptReader/Test/Test.cpp
index df0da71352..f30526b69f 100644
--- a/OfficeCryptReader/Test/Test.cpp
+++ b/OfficeCryptReader/Test/Test.cpp
@@ -43,8 +43,14 @@ int _tmain(int argc, _TCHAR* argv[])
 	//result = crypt_file.EncryptOfficeFile(srcFileName, dstFileName, password, L"123456789");
 	//result = crypt_file.DecryptOfficeFile(dstFileName, dstFileName2, password, bDataIntegrity);
 	
-	std::wstring addit_name = NSFile::CFileBinary::CreateTempFileWithUniqueName(L"", L"asd");
-	std::string addit_info = "11111111111111111111111111111";
-	crypt_file.WriteAdditional(srcFileName, addit_name.substr(1), addit_info);
+	std::wstring addit_name = L"11111111111111111111111111111";
+		
+	std::string addit_info = crypt_file.ReadAdditional(srcFileName, addit_name);
+
+	std::wstring temp = NSFile::CFileBinary::CreateTempFileWithUniqueName(L"", L"asd");
+	
+	addit_info += std::string(temp.begin(), temp.end());
+
+	crypt_file.WriteAdditional(srcFileName, addit_name, addit_info);
 	return 0;
 }
diff --git a/OfficeCryptReader/source/ECMACryptFile.cpp b/OfficeCryptReader/source/ECMACryptFile.cpp
index 7182b5f7b0..ecb99bb788 100644
--- a/OfficeCryptReader/source/ECMACryptFile.cpp
+++ b/OfficeCryptReader/source/ECMACryptFile.cpp
@@ -977,6 +977,33 @@ bool ECMACryptFile::DecryptOfficeFile(const std::wstring &file_name_inp, const s
 	return result;
 }
 
+std::string ECMACryptFile::ReadAdditional(const std::wstring &file_name, const std::wstring &addit_name)
+{
+	POLE::Storage *pStorage = new POLE::Storage(file_name.c_str());
+	
+	if (!pStorage->open(false, false))
+	{
+		delete pStorage;
+		return "";
+	}
+	std::string result;
+	POLE::Stream *pStream = new POLE::Stream(pStorage, addit_name);
+	if ((pStream) && (pStream->size() > 0))
+	{
+		_UINT64 lengthData, size = pStream->size();
+
+		char* data = new char[size];
+		
+		lengthData = pStream->read((unsigned char*)data, size); 
+
+		result = std::string(data, lengthData);
+		delete []data;
+		delete pStream;
+	}
+	delete pStorage;
+	
+	return result;
+}
 bool ECMACryptFile::WriteAdditional(const std::wstring &file_name, const std::wstring &addit_name, const std::string &addit_info)
 {
 	POLE::Storage *pStorage = new POLE::Storage(file_name.c_str());
@@ -992,6 +1019,7 @@ bool ECMACryptFile::WriteAdditional(const std::wstring &file_name, const std::ws
 	POLE::Stream *pStream = new POLE::Stream(pStorage, addit_name, true, addit_info.size());
 	
 	pStream->write((unsigned char*)addit_info.c_str(), addit_info.size());
+	pStream->setSize(addit_info.size());
 
 	pStream->flush();
 	delete pStream;
diff --git a/OfficeCryptReader/source/ECMACryptFile.h b/OfficeCryptReader/source/ECMACryptFile.h
index e30ab27320..d7a305382c 100644
--- a/OfficeCryptReader/source/ECMACryptFile.h
+++ b/OfficeCryptReader/source/ECMACryptFile.h
@@ -40,7 +40,9 @@ public:
 	bool DecryptOfficeFile(const std::wstring &file_name_inp, const std::wstring &file_name_out, const std::wstring &password, bool & bDataIntegrity);
 	bool EncryptOfficeFile(const std::wstring &file_name_inp, const std::wstring &file_name_out, const std::wstring &password, const std::wstring &documentID = L"");
 
+	std::string ReadAdditional(const std::wstring &file_name, const std::wstring &addit_name);
 	bool WriteAdditional(const std::wstring &file_name, const std::wstring &addit_name, const std::string &addit_info);
+	
 	struct _refComponent
 	{
 		int				type;
@@ -51,5 +53,5 @@ public:
 		std::vector<_refComponent>	refComponents;
 		std::wstring				dataSpaceName;
 	};
-	std::vector<_mapEntry>		mapEntries;
+	std::vector<_mapEntry> mapEntries;
 };