https://bz.apache.org/bugzilla/show_bug.cgi?id=60363
Bug ID: 60363
Summary: Missing Implementation for Encryption of XSSF
Workbooks
Product: POI
Version: 3.14-FINAL
Hardware: PC
Status: NEW
Severity: blocker
Priority: P2
Component: POIFS
Assignee: dev@poi.apache.org
Reporter: sme...@gmx.de
Target Milestone: ---
To create a password protected workbook using Encryptor, an instance of
POIFSFileSystem is required to create the encrypted data stream. There is no
XSSF implementation of POIFSFileSystem and the encryption is therefore not
possible. The following example illustrates the problem, an exception occures
in the line where the POIFSFileSystem is created.
public static void main(String[] args)
{
try(Workbook wb = new XSSFWorkbook())
{
Sheet sheet = wb.createSheet();
Row r = sheet.createRow(0);
Cell cell = r.createCell(0);
cell.setCellType(Cell.CELL_TYPE_STRING);
cell.setCellValue("Test");
try(ByteArrayOutputStream baos = new ByteArrayOutputStream())
{
wb.write(baos);
byte[] res = baos.toByteArray();
try(ByteArrayInputStream bais = new ByteArrayInputStream(res))
{
try(POIFSFileSystem fileSystem = new
POIFSFileSystem(bais);) // Exception here
{
EncryptionInfo info = new
EncryptionInfo(EncryptionMode.agile);
Encryptor enc = info.getEncryptor();
enc.confirmPassword("pass");
OutputStream encryptedDS =
enc.getDataStream(fileSystem);
OPCPackage opc = OPCPackage.open(new
File("example.xlsx"), PackageAccess.READ_WRITE);
opc.save(encryptedDS);
opc.close();
}
}
}
}
catch(Exception e)
{
e.printStackTrace();
}
}
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