poi-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Ajeet V. Singh" <Ajeet.Si...@mastek.com>
Subject RE: Creating encrypted documen(.doc and .docx)
Date Fri, 01 Aug 2014 07:31:58 GMT
Andreas,

Thanks for quick help!
Following are the answer for you asking's  

Can you provide me a failing .doc file?  That are attached please find the same(password:
123456).

So reading/writing the .docx files works, right?   Yes, am able read the .docx file but not
able to write.

In addition I have added the code which I have written the to read docx and doc both.

Sample Code:-

                 FileInputStream fis = new FileInputStream("sample1.doc"); 

	try {
		fs = new POIFSFileSystem(fis);
		System.out.println("File is password protected");
		EncryptionInfo info = new EncryptionInfo(fs);  //It will throw exception(posted below) at
this line, but if we pass .docx file to FileInputStream it will work properly.
		Decryptor d = Decryptor.getInstance(info);

		if (d.verifyPassword("123456")) {
			InputStream dataStream = d.getDataStream(fs);
			document = new XWPFDocument(dataStream);
		} else {
			throw new ApplicationException("Unable to process: wrong password ");
		}
	} catch (OfficeXmlFileException e) {
		System.out.println("File is Not password protected");
		document = new XWPFDocument(POIXMLDocument.openPackage(srcPath));
	}


Exception thrown is:-
java.io.FileNotFoundException: no such entry: "EncryptionInfo"


Thanks and Regards, 
Ajeet Singh



-----Original Message-----
From: Andreas Beeker [mailto:andreas.beeker@gmx.de] 
Sent: Friday, August 01, 2014 11:55 AM
To: POI Developers List
Subject: Re: Creating encrypted documen(.doc and .docx)


> I have to read an encrypted file and write the content of that file in 
> new file with some modification and with same password protection

> While using EncryptionInfo we are able to read .docx file but it's not 
> working if we use it for .doc

Currently the CryptoAPI method is not supported. Maybe your .doc file is using this encryption
method.
Furthermore the XOR obfuscation differs slightly for .xls and .doc files, and I have only
tested/developed it with .xls files :| ... and afaik both RC4/XOR methods are record based
encryption opposed to standard/agile encryption where the whole file is encrypted in one stream,
so POI supports it only for .xls

Can you provide me a failing .doc file?

So reading/writing the .docx files works, right?

MASTEK LTD.
In the US, we're called MAJESCOMASTEK

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Opinions expressed in this e-mail are those of the individual and not that of Mastek Limited,
unless specifically indicated to that effect. Mastek Limited does not accept any responsibility
or liability for it. This e-mail and attachments (if any) transmitted with it are confidential
and/or privileged and solely for the use of the intended person or entity to which it is addressed.
Any review, re-transmission, dissemination or other use of or taking of any action in reliance
upon this information by persons or entities other than the intended recipient is prohibited.
This e-mail and its attachments have been scanned for the presence of computer viruses. It
is the responsibility of the recipient to run the virus check on e-mails and attachments before
opening them. If you have received this e-mail in error, kindly delete this e-mail from desktop
and server.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Mime
View raw message