Example usage for org.apache.poi.poifs.crypt EncryptionInfo getEncryptor

Introduction

In this page you can find the example usage for org.apache.poi.poifs.crypt EncryptionInfo getEncryptor.

Prototype

public Encryptor getEncryptor() 

Source Link

Usage

From source file:de.jlo.talendcomp.excel.SpreadsheetFile.java

License:Apache License

private static void encryptFile(String inFilePath, String outFilePath, String password) throws Exception {
    if (password == null || password.trim().isEmpty()) {
        throw new Exception("Password cannot be null or empty!");
    }//  ww  w.  ja va 2s  .co m
    if (inFilePath == null || inFilePath.trim().isEmpty()) {
        throw new Exception("Input file cannot be null or empty!");
    }
    File inFile = new File(inFilePath);
    if (outFilePath == null || outFilePath.trim().isEmpty()) {
        throw new Exception("Output file cannot be null or empty!");
    }
    File outFile = new File(outFilePath);
    if (inFile.exists() == false) {
        throw new Exception("Excel file to encrypt: " + inFile.getAbsolutePath() + " does not exists!");
    }
    ensureDirExists(outFile);
    POIFSFileSystem fs = new POIFSFileSystem();
    EncryptionInfo info = new EncryptionInfo(EncryptionMode.standard);
    Encryptor enc = info.getEncryptor();
    enc.confirmPassword(password);
    OPCPackage opc = OPCPackage.open(inFile, PackageAccess.READ_WRITE);
    OutputStream os = enc.getDataStream(fs);
    opc.save(os);
    opc.close();
    FileOutputStream fos = null;
    Exception ex = null;
    try {
        fos = new FileOutputStream(outFile);
        fs.writeFilesystem(fos);
    } catch (Exception e) {
        ex = e;
    } finally {
        if (fos != null) {
            try {
                fos.close();
            } catch (Exception e1) {
                // ignore
            }
        }
    }
    if (ex != null) {
        throw ex;
    }
}

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From source file:uk.ac.ucl.cs.cmic.giftcloud.uploader.ExcelWriter.java

License:Open Source License

@Override
protected void saveFile(final File file) throws IOException {
    if (spreadsheetPassword.isPresent() && StringUtils.isNotBlank(new String(spreadsheetPassword.get()))) {
        try {// www . j a  v  a  2  s . com
            // Write the unencrypted spreadsheet to an in-memory stream
            final ByteArrayOutputStream baos = new ByteArrayOutputStream();
            workbook.write(baos);
            baos.close();

            // Create objects for encryption
            POIFSFileSystem fs = new POIFSFileSystem();
            EncryptionInfo info = new EncryptionInfo(fs, EncryptionMode.agile);
            Encryptor enc = info.getEncryptor();

            // Set the password
            enc.confirmPassword(new String(spreadsheetPassword.get()));

            // Open the in-memory spreadsheet
            InputStream inputStream = new ByteArrayInputStream(baos.toByteArray());
            OPCPackage opc = OPCPackage.open(inputStream);
            OutputStream os = enc.getDataStream(fs);
            opc.save(os);
            opc.close();
            inputStream.close();

            // Write the encrypted Excel spreadsheet
            FileOutputStream fos = new FileOutputStream(file);
            fs.writeFilesystem(fos);
            fos.close();
        } catch (InvalidFormatException e) {
            throw new IOException(
                    "Unable to save the patient list file due to the following InvalidFormatException when reading the excel file:"
                            + e.getLocalizedMessage(),
                    e);
        } catch (GeneralSecurityException e) {
            throw new IOException(
                    "Unable to save the patient list file due to the following GeneralSecurityException when reading the excel file:"
                            + e.getLocalizedMessage(),
                    e);
        }
    } else {
        // Write the unencrypted spreadsheet to an in-memory stream
        final FileOutputStream fos = new FileOutputStream(file);
        workbook.write(fos);
        fos.close();
    }
}

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