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org.apache.poi.poifs.crypt.agile
Class AgileDecryptor

java.lang.Object
  extended by org.apache.poi.poifs.crypt.Decryptor
      extended by org.apache.poi.poifs.crypt.agile.AgileDecryptor
All Implemented Interfaces:
java.lang.Cloneable
public class AgileDecryptor
extends Decryptor
implements java.lang.Cloneable

Decryptor implementation for Agile Encryption

Field Summary
 
Fields inherited from class org.apache.poi.poifs.crypt.Decryptor
DEFAULT_PASSWORD, DEFAULT_POIFS_ENTRY, encryptionInfo
 
Constructor Summary
protected AgileDecryptor()
           
 
Method Summary
 AgileDecryptor clone()
           
 java.io.InputStream getDataStream(DirectoryNode dir)
           
 long getLength()
           
protected static int getNextBlockSize(int inputLen, int blockSize)
           
protected static javax.crypto.Cipher initCipherForBlock(javax.crypto.Cipher existing, int block, boolean lastChunk, EncryptionInfo encryptionInfo, javax.crypto.SecretKey skey, int encryptionMode)
           
 boolean verifyPassword(java.security.KeyPair keyPair, java.security.cert.X509Certificate x509)
          instead of a password, it's also possible to decrypt via certificate.
 boolean verifyPassword(java.lang.String password)
          set decryption password
 
Methods inherited from class org.apache.poi.poifs.crypt.Decryptor
getBlockSizeInBytes, getDataStream, getDataStream, getDataStream, getDataStream, getEncryptionInfo, getInstance, getIntegrityHmacKey, getIntegrityHmacValue, getKeySizeInBytes, getSecretKey, getVerifier, initCipherForBlock, setChunkSize, setEncryptionInfo, setIntegrityHmacKey, setIntegrityHmacValue, setSecretKey, setVerifier
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

AgileDecryptor

protected AgileDecryptor()
Method Detail

verifyPassword

public boolean verifyPassword(java.lang.String password)
                       throws java.security.GeneralSecurityException
set decryption password

Specified by:
verifyPassword in class Decryptor
Throws:
java.security.GeneralSecurityException

verifyPassword

public boolean verifyPassword(java.security.KeyPair keyPair,
                              java.security.cert.X509Certificate x509)
                       throws java.security.GeneralSecurityException
instead of a password, it's also possible to decrypt via certificate. Warning: this code is experimental and hasn't been validated

Parameters:
keyPair -
x509 -
Returns:
true, when the data can be successfully decrypted with the given private key
Throws:
java.security.GeneralSecurityException
See Also:
Agile encryption with certificates

getNextBlockSize

protected static int getNextBlockSize(int inputLen,
                                      int blockSize)

getDataStream

public java.io.InputStream getDataStream(DirectoryNode dir)
                                  throws java.io.IOException,
                                         java.security.GeneralSecurityException
Specified by:
getDataStream in class Decryptor
Throws:
java.io.IOException
java.security.GeneralSecurityException

getLength

public long getLength()
Specified by:
getLength in class Decryptor

initCipherForBlock

protected static javax.crypto.Cipher initCipherForBlock(javax.crypto.Cipher existing,
                                                        int block,
                                                        boolean lastChunk,
                                                        EncryptionInfo encryptionInfo,
                                                        javax.crypto.SecretKey skey,
                                                        int encryptionMode)
                                                 throws java.security.GeneralSecurityException
Throws:
java.security.GeneralSecurityException

clone

public AgileDecryptor clone()
                     throws java.lang.CloneNotSupportedException
Overrides:
clone in class Decryptor
Throws:
java.lang.CloneNotSupportedException
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