org.apache.poi.poifs.crypt.temp

Class AesZipFileZipEntrySource

java.lang.Object

org.apache.poi.poifs.crypt.temp.AesZipFileZipEntrySource

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, ZipEntrySource

@Beta
public class AesZipFileZipEntrySource
extends java.lang.Object
implements ZipEntrySource

An example ZipEntrySource that has encrypted temp files to ensure that sensitive data is not stored in raw format on disk.

Constructor Summary

Constructors

Constructor and Description
AesZipFileZipEntrySource(java.io.File tmpFile, javax.crypto.Cipher ci)

Method Summary

Modifier and Type	Method and Description
void	close() Indicates we are done with reading, and resources may be freed
static AesZipFileZipEntrySource	createZipEntrySource(java.io.InputStream is)
java.util.Enumeration<? extends java.util.zip.ZipEntry>	getEntries() Note: the file sizes are rounded up to the next cipher block size, so don't rely on file sizes of these custom encrypted zip file entries!
java.io.InputStream	getInputStream(java.util.zip.ZipEntry entry) Returns an InputStream of the decompressed data that makes up the entry
boolean	isClosed() Has close been called already?

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AesZipFileZipEntrySource

public AesZipFileZipEntrySource(java.io.File tmpFile,
                                javax.crypto.Cipher ci)
                         throws java.io.IOException

Throws:

java.io.IOException

Method Detail

getEntries

public java.util.Enumeration<? extends java.util.zip.ZipEntry> getEntries()

Note: the file sizes are rounded up to the next cipher block size, so don't rely on file sizes of these custom encrypted zip file entries!

Specified by:

getEntries in interface ZipEntrySource

getInputStream

public java.io.InputStream getInputStream(java.util.zip.ZipEntry entry)
                                   throws java.io.IOException

Description copied from interface: ZipEntrySource

Returns an InputStream of the decompressed data that makes up the entry

Specified by:

getInputStream in interface ZipEntrySource

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Description copied from interface: ZipEntrySource

Indicates we are done with reading, and resources may be freed

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface ZipEntrySource

Throws:

java.io.IOException

isClosed

public boolean isClosed()

Description copied from interface: ZipEntrySource

Has close been called already?

Specified by:

isClosed in interface ZipEntrySource

createZipEntrySource

public static AesZipFileZipEntrySource createZipEntrySource(java.io.InputStream is)
                                                     throws java.io.IOException,
                                                            java.security.GeneralSecurityException

Throws:

java.io.IOException

java.security.GeneralSecurityException