Package org.docx4j.org.apache.poi.poifs.crypt.cryptoapi

Class CryptoAPIEncryptor

java.lang.Object

org.docx4j.org.apache.poi.poifs.crypt.Encryptor

org.docx4j.org.apache.poi.poifs.crypt.cryptoapi.CryptoAPIEncryptor

public class CryptoAPIEncryptor
extends Encryptor

Field Summary

Fields inherited from class org.docx4j.org.apache.poi.poifs.crypt.Encryptor

DEFAULT_POIFS_ENTRY

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	CryptoAPIEncryptor(CryptoAPIEncryptionInfoBuilder builder)

Method Summary

Modifier and Type	Method	Description
void	confirmPassword(String password)
void	confirmPassword(String password, byte[] keySpec, byte[] keySalt, byte[] verifier, byte[] verifierSalt, byte[] integritySalt)
protected void	createEncryptionInfoEntry(DirectoryNode dir)
OutputStream	getDataStream(DirectoryNode dir)	Encrypt the Document-/SummaryInformation and other optionally streams.
protected int	getKeySizeInBytes()
Cipher	initCipherForBlock(Cipher cipher, int block)	Initializes a cipher object for a given block index for encryption

Methods inherited from class org.docx4j.org.apache.poi.poifs.crypt.Encryptor

getDataStream, getDataStream, getDataStream, getInstance, getSecretKey, setSecretKey

Methods inherited from class java.lang.Object

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

Constructor Details

CryptoAPIEncryptor

protected CryptoAPIEncryptor(CryptoAPIEncryptionInfoBuilder builder)

Method Details

confirmPassword

public void confirmPassword(String password)

Specified by:

confirmPassword in class Encryptor

confirmPassword

public void confirmPassword(String password,
 byte[] keySpec,
 byte[] keySalt,
 byte[] verifier,
 byte[] verifierSalt,
 byte[] integritySalt)

Specified by:

confirmPassword in class Encryptor

initCipherForBlock

public Cipher initCipherForBlock(Cipher cipher,
 int block)
                          throws GeneralSecurityException

Initializes a cipher object for a given block index for encryption

Parameters:

cipher - may be null, otherwise the given instance is reset to the new block index

block - the block index, e.g. the persist/slide id (hslf)

Returns:

a new cipher object, if cipher was null, otherwise the reinitialized cipher

Throws:

GeneralSecurityException

getDataStream

public OutputStream getDataStream(DirectoryNode dir)
                           throws IOException,
GeneralSecurityException

Encrypt the Document-/SummaryInformation and other optionally streams. Opposed to other crypto modes, cryptoapi is record based and can't be used to stream-encrypt a whole file

Specified by:

getDataStream in class Encryptor

Parameters:

dir - the node to write to

Returns:

encrypted stream

Throws:

IOException

GeneralSecurityException

See Also:

• 2.3.5.4 RC4 CryptoAPI Encrypted Summary Stream

getKeySizeInBytes

protected int getKeySizeInBytes()

createEncryptionInfoEntry

protected void createEncryptionInfoEntry(DirectoryNode dir)
                                  throws IOException

Throws:

IOException