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Bouncy Castle Cryptography 1.45 | ||||||||
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java.lang.Objectorg.bouncycastle.crypto.engines.HC256Engine
public class HC256Engine
HC-256 is a software-efficient stream cipher created by Hongjun Wu. It generates keystream from a 256-bit secret key and a 256-bit initialization vector.
http://www.ecrypt.eu.org/stream/p3ciphers/hc/hc256_p3.pdf
Its brother, HC-128, is a third phase candidate in the eStream contest. The algorithm is patent-free. No attacks are known as of today (April 2007). See http://www.ecrypt.eu.org/stream/hcp3.html
| Constructor Summary | |
|---|---|
HC256Engine()
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| Method Summary | |
|---|---|
java.lang.String |
getAlgorithmName()
Return the name of the algorithm the cipher implements. |
void |
init(boolean forEncryption,
CipherParameters params)
Initialise a HC-256 cipher. |
void |
processBytes(byte[] in,
int inOff,
int len,
byte[] out,
int outOff)
process a block of bytes from in putting the result into out. |
void |
reset()
reset the cipher. |
byte |
returnByte(byte in)
encrypt/decrypt a single byte returning the result. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
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public HC256Engine()
| Method Detail |
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public java.lang.String getAlgorithmName()
StreamCipher
getAlgorithmName in interface StreamCipher
public void init(boolean forEncryption,
CipherParameters params)
throws java.lang.IllegalArgumentException
init in interface StreamCipherforEncryption - whether or not we are for encryption. Irrelevant, as
encryption and decryption are the same.params - the parameters required to set up the cipher.
java.lang.IllegalArgumentException - if the params argument is
inappropriate (ie. the key is not 256 bit long).
public void processBytes(byte[] in,
int inOff,
int len,
byte[] out,
int outOff)
throws DataLengthException
StreamCipher
processBytes in interface StreamCipherin - the input byte array.inOff - the offset into the in array where the data to be processed starts.len - the number of bytes to be processed.out - the output buffer the processed bytes go into.outOff - the offset into the output byte array the processed data starts at.
DataLengthException - if the output buffer is too small.public void reset()
StreamCipher
reset in interface StreamCipherpublic byte returnByte(byte in)
StreamCipher
returnByte in interface StreamCipherin - the byte to be processed.
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Bouncy Castle Cryptography 1.45 | ||||||||
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