gnu.javax.crypto.jce.cipher
Class ARCFourSpi
The Service Provider Interface (SPI) for the ARCFOUR stream
cipher.
protected byte[] | engineDoFinal(byte[] in, int offset, int length)- Finishes a multi-part transformation or transforms a portion of a
byte array, and returns the transformed bytes.
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protected int | engineDoFinal(byte[] in, int inOffset, int length, byte[] out, int outOffset)- Finishes a multi-part transformation or transforms a portion of a
byte array, and stores the transformed bytes in the supplied array.
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protected int | engineGetBlockSize()- Returns the block size of the underlying cipher.
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protected byte[] | engineGetIV()- Returns the initializaiton vector this cipher was initialized with,
if any.
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protected int | engineGetOutputSize(int in)- Returns the size, in bytes, an output buffer must be for a call
to
CipherSpi.engineUpdate(byte[],int,int,byte[],int) or CipherSpi.engineDoFinal(byte[],int,int,byte[],int) to succeed.
The actual output length may be smaller than the value returned
by this method, as it considers the padding length as well.
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protected AlgorithmParameters | engineGetParameters()- Returns the parameters that this cipher is using.
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protected void | engineInit(int mode, Key key, AlgorithmParameters p, SecureRandom r)- Initializes this cipher with an operation mode, key, parameters,
and source of randomness.
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protected void | engineInit(int mode, Key key, SecureRandom r)- Initializes this cipher with an operation mode, key, and source of
randomness.
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protected void | engineInit(int mode, Key key, AlgorithmParameterSpec p, SecureRandom r)- Initializes this cipher with an operation mode, key, parameters,
and source of randomness.
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protected void | engineSetMode(String s)- Set the mode in which this cipher is to run.
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protected void | engineSetPadding(String s)- Set the method with which the input is to be padded.
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protected byte[] | engineUpdate(byte[] in, int offset, int length)- Continue with a multi-part transformation, returning a new array of
the transformed bytes.
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protected int | engineUpdate(byte[] in, int inOffset, int length, byte[] out, int outOffset)- Continue with a multi-part transformation, storing the transformed
bytes into the specified array.
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engineDoFinal, engineDoFinal, engineDoFinal, engineGetBlockSize, engineGetIV, engineGetKeySize, engineGetOutputSize, engineGetParameters, engineInit, engineInit, engineInit, engineSetMode, engineSetPadding, engineUnwrap, engineUpdate, engineUpdate, engineUpdate, engineWrap |
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
ARCFourSpi
public ARCFourSpi()
Create a new CipherSpi.
engineGetIV
protected byte[] engineGetIV()
Returns the initializaiton vector this cipher was initialized with,
if any.
- engineGetIV in interface CipherSpi
- The IV, or null if this cipher uses no IV or if this
instance has not been initialized yet.
engineGetOutputSize
protected int engineGetOutputSize(int in)
Returns the size, in bytes, an output buffer must be for a call
to
CipherSpi.engineUpdate(byte[],int,int,byte[],int) or
CipherSpi.engineDoFinal(byte[],int,int,byte[],int) to succeed.
The actual output length may be smaller than the value returned
by this method, as it considers the padding length as well. The
length considered is the argument plus the length of any buffered,
unprocessed bytes.
- engineGetOutputSize in interface CipherSpi
- The size an output buffer must be.
engineGetParameters
protected AlgorithmParameters engineGetParameters()
Returns the parameters that this cipher is using. This may be the
parameters used to initialize this cipher, or it may be parameters
that have been initialized with random values.
- engineGetParameters in interface CipherSpi
- This cipher's parameters, or
null if this
cipher does not use parameters.
engineInit
protected void engineInit(int mode,
Key key,
SecureRandom r)
throws InvalidKeyException Initializes this cipher with an operation mode, key, and source of
randomness. If this cipher requires any other initializing data,
for example an initialization vector, then it should generate it
from the provided source of randomness.
- engineInit in interface CipherSpi
key - The key to initialize this cipher with.
engineUpdate
protected byte[] engineUpdate(byte[] in,
int offset,
int length) Continue with a multi-part transformation, returning a new array of
the transformed bytes.
- engineUpdate in interface CipherSpi
engineUpdate
protected int engineUpdate(byte[] in,
int inOffset,
int length,
byte[] out,
int outOffset)
throws ShortBufferException Continue with a multi-part transformation, storing the transformed
bytes into the specified array.
- engineUpdate in interface CipherSpi
ShortBufferException - If there is not enough
space in the output array to store the transformed bytes.
ARCFourSpi.java --
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