public class BinaryRC4Decryptor extends Decryptor
builder, DEFAULT_PASSWORD, DEFAULT_POIFS_ENTRY| Modifier | Constructor and Description |
|---|---|
protected |
BinaryRC4Decryptor(BinaryRC4EncryptionInfoBuilder builder) |
| Modifier and Type | Method and Description |
|---|---|
protected static javax.crypto.SecretKey |
generateSecretKey(java.lang.String password,
EncryptionVerifier ver) |
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). |
protected static javax.crypto.Cipher |
initCipherForBlock(javax.crypto.Cipher cipher,
int block,
EncryptionInfoBuilder builder,
javax.crypto.SecretKey skey,
int encryptMode) |
boolean |
verifyPassword(java.lang.String password) |
getBlockSizeInBytes, getDataStream, getDataStream, getDataStream, getInstance, getIntegrityHmacKey, getIntegrityHmacValue, getKeySizeInBytes, getSecretKey, getVerifier, setIntegrityHmacKey, setIntegrityHmacValue, setSecretKey, setVerifierprotected BinaryRC4Decryptor(BinaryRC4EncryptionInfoBuilder builder)
public boolean verifyPassword(java.lang.String password)
verifyPassword in class Decryptorprotected static javax.crypto.Cipher initCipherForBlock(javax.crypto.Cipher cipher,
int block,
EncryptionInfoBuilder builder,
javax.crypto.SecretKey skey,
int encryptMode)
throws java.security.GeneralSecurityException
java.security.GeneralSecurityExceptionprotected static javax.crypto.SecretKey generateSecretKey(java.lang.String password,
EncryptionVerifier ver)
public java.io.InputStream getDataStream(DirectoryNode dir) throws java.io.IOException, java.security.GeneralSecurityException
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 Decryptordir - the node to read fromjava.io.IOExceptionjava.security.GeneralSecurityExceptionpublic long getLength()
DecryptorDecryptor.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.
Copyright 2017 The Apache Software Foundation or its licensors, as applicable.