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java.lang.Object | +--xjava.security.IJCE_Traceable | +--xjava.security.Cipher | +--cryptix.provider.cipher.Rijndael
Rijndael --pronounced Reindaal-- is a symmetric cipher with a 128-bit block size and variable key-size (128-, 192- and 256-bit).
Rijndael was designed by Vincent Rijmen and Joan Daemen.
Fields inherited from class xjava.security.Cipher |
DECRYPT, ENCRYPT, UNINITIALIZED |
Fields inherited from class xjava.security.IJCE_Traceable |
tracing |
Constructor Summary | |
Rijndael()
|
Method Summary | |
(package private) static void |
|
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. |
Methods inherited from class xjava.security.IJCE_Traceable |
disableTracing, enableTracing, traceMethod, traceResult, traceResult, traceVoidMethod |
Methods inherited from class java.lang.Object |
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
public Rijndael()
Method Detail |
protected void coreInit(java.security.Key key, boolean decrypt) throws java.security.InvalidKeyException
protected void engineInitEncrypt(java.security.Key key) throws java.security.KeyException
Cipher
After a call to this method, the cipher's state is set to ENCRYPT.
engineInitEncrypt
in class Cipher
xjava.security.Cipher
key
- 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
Cipher
After a call to this method, the cipher's state is set to DECRYPT.
engineInitDecrypt
in class Cipher
xjava.security.Cipher
key
- 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 Cipher
xjava.security.Cipher
in
- 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
xjava.security.Cipher
static void()
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