public final class Rijndael extends Cipher implements SymmetricCipher
Rijndael was designed by Vincent Rijmen and Joan Daemen.
DECRYPT, ENCRYPT, UNINITIALIZED| Constructor and Description |
|---|
Rijndael() |
| Modifier and Type | Method and Description |
|---|---|
protected void |
coreInit(java.security.Key key,
boolean decrypt) |
protected int |
engineBlockSize()
SPI: Returns the length of a block, in bytes.
|
protected void |
engineInitDecrypt(java.security.Key key)
SPI: Initializes this cipher for decryption, using the
specified key.
|
protected void |
engineInitEncrypt(java.security.Key key)
SPI: Initializes this cipher for encryption, using the
specified key.
|
protected int |
engineUpdate(byte[] in,
int inOffset,
int inLen,
byte[] out,
int outOffset)
SPI: This is the main engine method for updating data.
|
blockSize, clone, crypt, crypt, crypt, doFinal, doFinal, doFinal, doFinal, engineCiphertextBlockSize, engineCrypt, engineGetParameter, engineInBufferSize, engineOutBufferSize, enginePlaintextBlockSize, engineSetPaddingScheme, engineSetParameter, getAlgorithm, getAlgorithms, getAlgorithms, getCiphertextBlockSize, getInputBlockSize, getInstance, getInstance, getInstance, getMode, getOutputBlockSize, getPadding, getPaddingScheme, getParameter, getPlaintextBlockSize, getProvider, getState, inBufferSize, inBufferSizeFinal, initDecrypt, initEncrypt, isPaddingBlockCipher, outBufferSize, outBufferSizeFinal, setParameter, toString, update, update, update, updateprotected void coreInit(java.security.Key key,
boolean decrypt)
throws java.security.InvalidKeyException
java.security.InvalidKeyExceptionprotected void engineInitEncrypt(java.security.Key key)
throws java.security.KeyException
CipherAfter a call to this method, the cipher's state is set to ENCRYPT.
engineInitEncrypt in class Cipherkey - the key to use for encryption.java.security.KeyException - if the key is invalid.protected void engineInitDecrypt(java.security.Key key)
throws java.security.KeyException
CipherAfter a call to this method, the cipher's state is set to DECRYPT.
engineInitDecrypt in class Cipherkey - the key to use for decryption.java.security.KeyException - if the key is invalid.protected int engineUpdate(byte[] in,
int inOffset,
int inLen,
byte[] out,
int outOffset)
Cipher
When implBuffering is true, this method will be called
with the same data that is passed to update or
crypt (i.e. there will be exactly one call to
engineUpdate for each call to update or
crypt).
When implBuffering is false, the Cipher superclass will
ensure that when it calls this method, inLen is a non-negative
multiple of getInputBlockSize().
in and out may be the same array, and the input and output regions may overlap. A cipher implementation should not use any part of in or out as working storage for intermediate steps of the algorithm. It should copy only the final result into the out array.
SECURITY: if array arguments are passed to native code, the implementation must ensure that a buffer overflow or illegal memory access cannot occur, regardless of the arguments passed to this method. I.e. the native library should not be called if:
in == null || out == null || inLen < 0 || inLen % (block size) != 0 || inOffset < 0 || (long)inOffset + inLen > in.length || outOffset < 0 || (long)outOffset + (number of bytes to be written) > out.length
Note that the (long) casts are essential, because
inOffset or outOffset could be close to
Integer.MAX_VALUE. The native method being called
should be private. This is important because untrusted code could
subclass the cipher implementation, and call this method directly
with any arguments.
engineUpdate in class Cipherin - the input data.inOffset - the offset into in specifying where the
data starts.inLen - the length of the subarray.out - the output array.outOffset - the offset indicating where to start writing into
the out array.protected int engineBlockSize()
Cipher
The value may change when initEncrypt or
initDecrypt is called, but it should not change at
other times.
engineBlockSize in class Cipher