public class StandardDecryptor extends Decryptor
DEFAULT_PASSWORD, DEFAULT_POIFS_ENTRY, encryptionInfo
Modifier | Constructor and Description |
---|---|
protected |
StandardDecryptor() |
protected |
StandardDecryptor(StandardDecryptor other) |
Modifier and Type | Method and Description |
---|---|
StandardDecryptor |
copy() |
protected static byte[] |
fillAndXor(byte[] hash,
byte fillByte) |
protected static javax.crypto.SecretKey |
generateSecretKey(java.lang.String password,
EncryptionVerifier ver,
int keySize) |
java.io.InputStream |
getDataStream(DirectoryNode dir)
Return a stream with decrypted data.
|
long |
getLength()
Returns the length of the encrypted data that can be safely read with
Decryptor.getDataStream(org.apache.poi.poifs.filesystem.DirectoryNode) . |
boolean |
verifyPassword(java.lang.String password) |
getBlockSizeInBytes, getDataStream, getDataStream, getEncryptionInfo, getGenericProperties, getInstance, getIntegrityHmacKey, getIntegrityHmacValue, getKeySizeInBytes, getSecretKey, getVerifier, initCipherForBlock, setChunkSize, setEncryptionInfo, setIntegrityHmacKey, setIntegrityHmacValue, setSecretKey, setVerifier
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
getGenericChildren, getGenericRecordType
protected StandardDecryptor()
protected StandardDecryptor(StandardDecryptor other)
public boolean verifyPassword(java.lang.String password)
verifyPassword
in class Decryptor
protected static javax.crypto.SecretKey generateSecretKey(java.lang.String password, EncryptionVerifier ver, int keySize)
protected static byte[] fillAndXor(byte[] hash, byte fillByte)
public java.io.InputStream getDataStream(DirectoryNode dir) throws java.io.IOException
Decryptor
Use Decryptor.getLength()
to get the size of that data that can be safely read from the stream.
Just reading to the end of the input stream is not sufficient because there are
normally padding bytes that must be discarded
getDataStream
in class Decryptor
dir
- the node to read fromjava.io.IOException
public long getLength()
Decryptor
Decryptor.getDataStream(org.apache.poi.poifs.filesystem.DirectoryNode)
.
Just reading to the end of the input stream is not sufficient because there are
normally padding bytes that must be discarded
The length variable is initialized in Decryptor.getDataStream(org.apache.poi.poifs.filesystem.DirectoryNode)
,
an attempt to call getLength() prior to getDataStream() will result in IllegalStateException.
getLength
in class Decryptor
getDataStream(DirectoryNode)
public StandardDecryptor copy()
Copyright 2021 The Apache Software Foundation or its licensors, as applicable.