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Bouncy Castle Cryptography Library 1.81 | |||||||||
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java.lang.Objectorg.bouncycastle.crypto.engines.Shacal2Engine
Block cipher Shacal2, designed by Helena Handschuh and David Naccache, based on hash function SHA-256, using SHA-256-Initialization-Values as data and SHA-256-Data as key.
A description of Shacal can be found at: https://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.3.4066 Best known cryptanalytic (Wikipedia 11.2013): Related-key rectangle attack on 44-rounds (Jiqiang Lu, Jongsung Kim). Comments are related to SHA-256-Naming as described in FIPS PUB 180-2
Constructor Summary | |
Shacal2Engine()
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Method Summary | |
java.lang.String |
getAlgorithmName()
Return the name of the algorithm the cipher implements. |
int |
getBlockSize()
Return the block size for this cipher (in bytes). |
void |
init(boolean _forEncryption,
CipherParameters params)
Initialise the cipher. |
int |
processBlock(byte[] in,
int inOffset,
byte[] out,
int outOffset)
Process one block of input from the array in and write it to the out array. |
void |
reset()
Reset the cipher. |
void |
setKey(byte[] kb)
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Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public Shacal2Engine()
Method Detail |
public void reset()
BlockCipher
reset
in interface BlockCipher
public java.lang.String getAlgorithmName()
BlockCipher
getAlgorithmName
in interface BlockCipher
public int getBlockSize()
BlockCipher
getBlockSize
in interface BlockCipher
public void init(boolean _forEncryption, CipherParameters params) throws java.lang.IllegalArgumentException
BlockCipher
init
in interface BlockCipher
_forEncryption
- if true the cipher is initialised for
encryption, if false for decryption.params
- the key and other data required by the cipher.
java.lang.IllegalArgumentException
- if the params argument is
inappropriate.public void setKey(byte[] kb)
public int processBlock(byte[] in, int inOffset, byte[] out, int outOffset) throws DataLengthException, java.lang.IllegalStateException
BlockCipher
processBlock
in interface BlockCipher
in
- the array containing the input data.inOffset
- offset into the in array the data starts at.out
- the array the output data will be copied into.outOffset
- the offset into the out array the output will start at.
DataLengthException
- if there isn't enough data in input , or
space in out.
java.lang.IllegalStateException
- if the cipher isn't initialised.
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Bouncy Castle Cryptography Library 1.81 | |||||||||
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