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java.lang.Object
xjava.security.IJCE_Traceable
xjava.security.Cipher
cryptix.provider.cipher.Rijndael
Field Summary |
Fields inherited from class xjava.security.Cipher | |
DECRYPT , ENCRYPT , UNINITIALIZED |
Fields inherited from class xjava.security.IJCE_Traceable | |
tracing |
Constructor Summary | |
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Method Summary | |
protected void |
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protected int |
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protected void |
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protected void |
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protected int |
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Methods inherited from class xjava.security.IJCE_Traceable | |
disableTracing , enableTracing , traceMethod , traceResult , traceResult , traceVoidMethod |
public Rijndael()
Deprecated.
The JCE docs say: "Constructor used for dynamic instantiation." I don't understand why this is needed. --DJH
protected void coreInit(Key key, boolean decrypt) throws InvalidKeyException
protected int engineBlockSize()
SPI: Returns the length of a block, in bytes. Ciphers for which plaintext and ciphertext blocks are the same size may override this method. Otherwise, both enginePlaintextBlockSize and engineCiphertextBlockSize should be overridden. The value may change wheninitEncrypt
orinitDecrypt
is called, but it should not change at other times.
- Overrides:
- engineBlockSize in interface Cipher
- Returns:
- the length in bytes of a block for this cipher.
protected void engineInitDecrypt(Key key) throws KeyException
SPI: Initializes this cipher for decryption, using the specified key. After a call to this method, the cipher's state is set to DECRYPT.
- Overrides:
- engineInitDecrypt in interface Cipher
- Parameters:
key
- the key to use for decryption.
protected void engineInitEncrypt(Key key) throws KeyException
SPI: Initializes this cipher for encryption, using the specified key. After a call to this method, the cipher's state is set to ENCRYPT.
- Overrides:
- engineInitEncrypt in interface Cipher
- Parameters:
key
- the key to use for encryption.
protected int engineUpdate(byte[] in, int inOffset, int inLen, byte[] out, int outOffset)
SPI: This is the main engine method for updating data. WhenimplBuffering
is true, this method will be called with the same data that is passed toupdate
orcrypt
(i.e. there will be exactly one call toengineUpdate
for each call toupdate
orcrypt
). WhenimplBuffering
is false, the Cipher superclass will ensure that when it calls this method, inLen is a non-negative multiple ofgetInputBlockSize()
. 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 <320 || inLen % (block size) != 0 || inOffset <320 || (long)inOffset + inLen > in.length || outOffset <320 || (long)outOffset + (number of bytes to be written) > out.lengthNote that the(long)
casts are essential, because inOffset or outOffset could be close toInteger.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.
- Overrides:
- engineUpdate in interface Cipher
- Parameters:
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.
- Returns:
- the number of bytes written.