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java.lang.Object
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+--gnu.crypto.prng.BasePRNG
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+--gnu.crypto.prng.ARCFour
RC4 is a stream cipher developed by Ron Rivest. Until 1994 RC4 was a trade secret of RSA Data Security, Inc., when it was released anonymously to a mailing list. This version is a descendent of that code, and since there is no proof that the leaked version was in fact RC4 and because "RC4" is a trademark, it is called "ARCFOUR", short for "Allegedly RC4".
This class only implements the keystream of ARCFOUR. To use this as a stream cipher, one would say:
out = in ^ arcfour.nextByte();
This operation works for encryption and decryption.
References:
| Field Summary | |
|---|---|
static java.lang.String |
ARCFOUR_KEY_MATERIAL
The attributes property name for the key bytes. |
static int |
ARCFOUR_SBOX_SIZE
The size of the internal S-box. |
| Fields inherited from class gnu.crypto.prng.BasePRNG |
|---|
buffer, initialised, name, ndx |
| Constructor Summary | |
|---|---|
ARCFour()
Default 0-arguments constructor. |
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| Method Summary | |
|---|---|
java.lang.Object |
clone()
Returns a clone copy of this instance. |
void |
fillBlock()
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void |
setup(java.util.Map attributes)
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| Methods inherited from class gnu.crypto.prng.BasePRNG |
|---|
init, isInitialised, name, nextByte, nextBytes |
| Methods inherited from class java.lang.Object |
|---|
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
public static final java.lang.String ARCFOUR_KEY_MATERIAL
public static final int ARCFOUR_SBOX_SIZE
| Constructor Detail |
public ARCFour()
| Method Detail |
public java.lang.Object clone()
IRandomReturns a clone copy of this instance.
clone in interface IRandomclone in class BasePRNGpublic void setup(java.util.Map attributes)
setup in class BasePRNG
public void fillBlock()
throws LimitReachedException
fillBlock in class BasePRNGLimitReachedException
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For the latest news and information visit The GNU Crypto project |
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