|
|||||||||
| Home >> All >> cryptix >> jce >> provider >> [ pbe overview ] | PREV CLASS NEXT CLASS | ||||||||
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD |
DETAIL: FIELD | CONSTR | METHOD | ||||||||
cryptix.jce.provider.pbe
Class PBEBase
java.lang.Objectjavax.crypto.CipherSpi
- Direct Known Subclasses:
- PBEWithMD2AndDES
- public abstract class PBEBase
- extends javax.crypto.CipherSpi
This is the base class for any PBE cipher. It is derived from CipherSpi as other ciphers are.
| Field Summary | |
protected javax.crypto.Cipher |
cipher
Used cipher. |
protected static java.lang.String |
mode
PBE ciphers are run in CBC mode. |
protected static java.lang.String |
padding
PBE ciphers do PKCS#5 padding. |
protected static java.lang.String |
provider
Provider we use. |
| Constructor Summary | |
protected |
PBEBase()
|
| Method Summary | |
java.lang.Object |
clone()
Always throws a CloneNotSupportedException (cloning of ciphers is not supported for security reasons). |
protected abstract void |
coreInit(int opmode,
byte[] password,
byte[] salt,
int iteration)
This method is only implemented by subclasses of PBEBase. |
protected byte[] |
coreKeyGen(java.lang.String mdStr,
byte[] password,
byte[] salt,
int iteration,
int keysize)
This method produces the key using specified message digest function, password, salt and iteration count. |
protected byte[] |
engineDoFinal(byte[] input,
int inputOffset,
int inputLen)
Do the last step of the encryption or decryption. |
protected int |
engineDoFinal(byte[] input,
int inputOffset,
int inputLen,
byte[] output,
int outputOffset)
Do the last step of encryption or decryption. |
protected int |
engineGetBlockSize()
Returns the blocksize of the underlying cipher. |
protected byte[] |
engineGetIV()
Returns the IV of the underlying cipher. |
protected int |
engineGetOutputSize(int inputLen)
Returns the output size of the underlying cipher if input has given length. |
protected java.security.AlgorithmParameters |
engineGetParameters()
Returns the algorithm parameters of the underlying cipher. |
protected void |
engineInit(int opmode,
java.security.Key key,
java.security.spec.AlgorithmParameterSpec params,
java.security.SecureRandom random)
Initializes the cipher. |
protected void |
engineInit(int opmode,
java.security.Key key,
java.security.AlgorithmParameters params,
java.security.SecureRandom random)
Initialize the cipher using mainly AlgorithmParameters for further information needed by PBE. |
protected void |
engineInit(int opmode,
java.security.Key key,
java.security.SecureRandom random)
Initializes the cipher. |
protected void |
engineSetMode(java.lang.String mode)
Sets the mode of a cipher. |
protected void |
engineSetPadding(java.lang.String padding)
Sets the padding of the cipher. |
protected byte[] |
engineUpdate(byte[] input,
int inputOffset,
int inputLen)
Feed the cipher with given length of data of the input buffer starting at offset. |
protected int |
engineUpdate(byte[] input,
int inputOffset,
int inputLen,
byte[] output,
int outputOffset)
Feed the cipher with given length of data of the input buffer starting at offset. |
| Methods inherited from class javax.crypto.CipherSpi |
engineDoFinal, engineGetKeySize, engineUnwrap, engineUpdate, engineWrap |
| Methods inherited from class java.lang.Object |
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
mode
protected static final java.lang.String mode
- PBE ciphers are run in CBC mode.
- See Also:
- Constant Field Values
padding
protected static final java.lang.String padding
- PBE ciphers do PKCS#5 padding.
- See Also:
- Constant Field Values
provider
protected static final java.lang.String provider
- Provider we use.
- See Also:
- Constant Field Values
cipher
protected javax.crypto.Cipher cipher
- Used cipher.
| Constructor Detail |
PBEBase
protected PBEBase()
| Method Detail |
clone
public final java.lang.Object clone() throws java.lang.CloneNotSupportedException
- Always throws a CloneNotSupportedException (cloning of ciphers is not
supported for security reasons).
engineSetMode
protected void engineSetMode(java.lang.String mode) throws java.security.NoSuchAlgorithmException
- Sets the mode of a cipher. PBE only uses CBC for its cipher so we only
allow CBC as parameter.
engineSetPadding
protected void engineSetPadding(java.lang.String padding) throws javax.crypto.NoSuchPaddingException
- Sets the padding of the cipher. PBE uses PKCS#5 padding scheme so we only
allow PKCS#5 padding strings as arguments.
engineGetBlockSize
protected int engineGetBlockSize()
- Returns the blocksize of the underlying cipher.
engineGetOutputSize
protected int engineGetOutputSize(int inputLen)
- Returns the output size of the underlying cipher if
input has given length.
engineGetIV
protected byte[] engineGetIV()
- Returns the IV of the underlying cipher.
engineGetParameters
protected java.security.AlgorithmParameters engineGetParameters()
- Returns the algorithm parameters of the underlying cipher.
engineInit
protected void engineInit(int opmode,
java.security.Key key,
java.security.SecureRandom random)
throws java.security.InvalidKeyException
- Initializes the cipher. As this method does not provide all
input data needed for PBE it always throws an exception.
engineInit
protected void engineInit(int opmode,
java.security.Key key,
java.security.spec.AlgorithmParameterSpec params,
java.security.SecureRandom random)
throws java.security.InvalidKeyException,
java.security.InvalidAlgorithmParameterException
- Initializes the cipher. This init method gives us all the needed
information (through AlgorithmParameterSpec) for PBE.
engineInit
protected void engineInit(int opmode,
java.security.Key key,
java.security.AlgorithmParameters params,
java.security.SecureRandom random)
throws java.security.InvalidKeyException,
java.security.InvalidAlgorithmParameterException
- Initialize the cipher using mainly AlgorithmParameters for
further information needed by PBE.
Get the AlgorithmParameterSpec of AlgorithmParameters call the
other init method.
engineUpdate
protected byte[] engineUpdate(byte[] input,
int inputOffset,
int inputLen)
- Feed the cipher with given length of data of the input buffer starting
at offset.
engineUpdate
protected int engineUpdate(byte[] input,
int inputOffset,
int inputLen,
byte[] output,
int outputOffset)
throws javax.crypto.ShortBufferException
- Feed the cipher with given length of data of the input buffer starting
at offset. The result is written into the provided buffer starting
at provided offset.
engineDoFinal
protected byte[] engineDoFinal(byte[] input,
int inputOffset,
int inputLen)
throws javax.crypto.IllegalBlockSizeException,
javax.crypto.BadPaddingException
- Do the last step of the encryption or decryption.
engineDoFinal
protected int engineDoFinal(byte[] input,
int inputOffset,
int inputLen,
byte[] output,
int outputOffset)
throws javax.crypto.ShortBufferException,
javax.crypto.IllegalBlockSizeException,
javax.crypto.BadPaddingException
- Do the last step of encryption or decryption.
coreInit
protected abstract void coreInit(int opmode,
byte[] password,
byte[] salt,
int iteration)
throws java.security.InvalidKeyException
- This method is only implemented by subclasses of PBEBase.
All params which are needed for PBE are passed to it
coreKeyGen
protected byte[] coreKeyGen(java.lang.String mdStr, byte[] password, byte[] salt, int iteration, int keysize) throws java.security.InvalidKeyException
- This method produces the key using specified message digest
function, password, salt and iteration count.
|
|||||||||
| Home >> All >> cryptix >> jce >> provider >> [ pbe overview ] | PREV CLASS NEXT CLASS | ||||||||
|
SUMMARY: JAVADOC | SOURCE | DOWNLOAD | NESTED | FIELD | CONSTR | METHOD |
DETAIL: FIELD | CONSTR | METHOD | ||||||||