Package org.apache.poi.poifs.crypt.agile
Class AgileDecryptor
- java.lang.Object
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- org.apache.poi.poifs.crypt.Decryptor
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- org.apache.poi.poifs.crypt.agile.AgileDecryptor
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- All Implemented Interfaces:
GenericRecord
public class AgileDecryptor extends Decryptor
Decryptor implementation for Agile Encryption
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Field Summary
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Fields inherited from class org.apache.poi.poifs.crypt.Decryptor
DEFAULT_PASSWORD, DEFAULT_POIFS_ENTRY
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description AgileDecryptor
copy()
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 withDecryptor.getDataStream(org.apache.poi.poifs.filesystem.DirectoryNode)
.boolean
verifyPassword(java.lang.String password)
set decryption password-
Methods inherited from class org.apache.poi.poifs.crypt.Decryptor
getDataStream, getDataStream, getEncryptionInfo, getGenericProperties, getInstance, getIntegrityHmacKey, getIntegrityHmacValue, getSecretKey, getVerifier, initCipherForBlock, setChunkSize, setEncryptionInfo
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Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.apache.poi.common.usermodel.GenericRecord
getGenericChildren, getGenericRecordType
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Method Detail
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verifyPassword
public boolean verifyPassword(java.lang.String password) throws java.security.GeneralSecurityException
set decryption password- Specified by:
verifyPassword
in classDecryptor
- Throws:
java.security.GeneralSecurityException
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getDataStream
public java.io.InputStream getDataStream(DirectoryNode dir) throws java.io.IOException, java.security.GeneralSecurityException
Description copied from class:Decryptor
Return a stream with decrypted data.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- Specified by:
getDataStream
in classDecryptor
- Parameters:
dir
- the node to read from- Returns:
- decrypted stream
- Throws:
java.io.IOException
java.security.GeneralSecurityException
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getLength
public long getLength()
Description copied from class:Decryptor
Returns the length of the encrypted data that can be safely read withDecryptor.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 discardedThe 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.
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copy
public AgileDecryptor copy()
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