Bouncy Castle Provider 1.77 · org.bouncycastle.crypto.engines.RC532Engine

Modifier and Type	Field and Description
private int	_noRounds
private int[]	_S
private boolean	forEncryption
private static final int	P32
private static final int	Q32

Access	Constructor and Description
public	RC532Engine() Create an instance of the RC5 encryption algorithm and set some defaults

Method Summary

Modifier and Type	Method and Description
private int	bytesToWord(byte[] src, int srcOff)
private int	decryptBlock(byte[] in, int inOff, byte[] out, int outOff)
private int	encryptBlock(byte[] in byte buffer containing data to encrypt in, int offset into src buffer inOff, byte[] out buffer where encrypted data is written out, int offset into out buffer outOff) Encrypt the given block starting at the given offset and place the result in the provided buffer starting at the given offset.
public String	getAlgorithmName() Implements org.bouncycastle.crypto.BlockCipher.getAlgorithmName. Return the name of the algorithm the cipher implements.
public int	getBlockSize() Implements org.bouncycastle.crypto.BlockCipher.getBlockSize. Return the block size for this cipher (in bytes).
public void	init(boolean whether or not we are for encryption. forEncryption, CipherParameters the parameters required to set up the cipher. params) Implements org.bouncycastle.crypto.BlockCipher.init. initialise a RC5-32 cipher.
public int	processBlock(byte[] the array containing the input data. in, int offset into the in array the data starts at. inOff, byte[] the array the output data will be copied into. out, int the offset into the out array the output will start at. outOff) Implements org.bouncycastle.crypto.BlockCipher.processBlock. Process one block of input from the array in and write it to the out array.
public void	reset() Implements org.bouncycastle.crypto.BlockCipher.reset. Reset the cipher.
private int	rotateLeft(int word to rotate x, int number of bits to rotate % 32 y) Perform a left "spin" of the word.
private int	rotateRight(int word to rotate x, int number of bits to rotate % 32 y) Perform a right "spin" of the word.
private void	setKey(byte[] the key to be used key) Re-key the cipher.
private void	wordToBytes(int word, byte[] dst, int dstOff)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

_noRounds	back to summary
private int _noRounds

_S	back to summary
private int[] _S

forEncryption	back to summary
private boolean forEncryption

P32	back to summary
private static final int P32

Q32	back to summary
private static final int Q32

RC532Engine	back to summary
public RC532Engine() Create an instance of the RC5 encryption algorithm and set some defaults

Method Detail

bytesToWord	back to summary
private int bytesToWord(byte[] src, int srcOff)

decryptBlock	back to summary
private int decryptBlock(byte[] in, int inOff, byte[] out, int outOff)

encryptBlock	back to summary
private int encryptBlock(byte[] in, int inOff, byte[] out, int outOff) Encrypt the given block starting at the given offset and place the result in the provided buffer starting at the given offset. Parameters in:byte[] in byte buffer containing data to encrypt inOff:int offset into src buffer out:byte[] out buffer where encrypted data is written outOff:int offset into out buffer

encryptBlock

back to summary

private int encryptBlock(byte[] in, int inOff, byte[] out, int outOff)

Encrypt the given block starting at the given offset and place the result in the provided buffer starting at the given offset.

Parameters

in:byte[]: in byte buffer containing data to encrypt
inOff:int: offset into src buffer
out:byte[]: out buffer where encrypted data is written
outOff:int: offset into out buffer

getAlgorithmName	back to summary
public String getAlgorithmName() Implements org.bouncycastle.crypto.BlockCipher.getAlgorithmName. Doc from org.bouncycastle.crypto.BlockCipher.getAlgorithmName. Return the name of the algorithm the cipher implements. Returns:String the name of the algorithm the cipher implements.

getAlgorithmName

back to summary

public String getAlgorithmName()

Implements org.bouncycastle.crypto.BlockCipher.getAlgorithmName.

Doc from org.bouncycastle.crypto.BlockCipher.getAlgorithmName.

Return the name of the algorithm the cipher implements.

Returns:String: the name of the algorithm the cipher implements.

getBlockSize	back to summary
public int getBlockSize() Implements org.bouncycastle.crypto.BlockCipher.getBlockSize. Doc from org.bouncycastle.crypto.BlockCipher.getBlockSize. Return the block size for this cipher (in bytes). Returns:int the block size for this cipher in bytes.

getBlockSize

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public int getBlockSize()

Implements org.bouncycastle.crypto.BlockCipher.getBlockSize.

Doc from org.bouncycastle.crypto.BlockCipher.getBlockSize.

Return the block size for this cipher (in bytes).

Returns:int: the block size for this cipher in bytes.

init	back to summary
public void init(boolean forEncryption, CipherParameters params) Implements org.bouncycastle.crypto.BlockCipher.init. initialise a RC5-32 cipher. Parameters forEncryption:boolean whether or not we are for encryption. params:CipherParameters the parameters required to set up the cipher. Exceptions IllegalArgumentException: if the params argument is inappropriate.

init

back to summary

public void init(boolean forEncryption, CipherParameters params)

Implements org.bouncycastle.crypto.BlockCipher.init.

initialise a RC5-32 cipher.

Parameters

forEncryption:boolean: whether or not we are for encryption.
params:CipherParameters: the parameters required to set up the cipher.

Exceptions

IllegalArgumentException:: if the params argument is inappropriate.

processBlock	back to summary
public int processBlock(byte[] in, int inOff, byte[] out, int outOff) Implements org.bouncycastle.crypto.BlockCipher.processBlock. Doc from org.bouncycastle.crypto.BlockCipher.processBlock. Process one block of input from the array in and write it to the out array. Parameters in:byte[] the array containing the input data. inOff:int offset into the in array the data starts at. out:byte[] the array the output data will be copied into. outOff:int the offset into the out array the output will start at. Returns:int the number of bytes processed and produced.

processBlock

back to summary

public int processBlock(byte[] in, int inOff, byte[] out, int outOff)

Implements org.bouncycastle.crypto.BlockCipher.processBlock.

Doc from org.bouncycastle.crypto.BlockCipher.processBlock.

Process one block of input from the array in and write it to the out array.

Parameters

in:byte[]: the array containing the input data.
inOff:int: offset into the in array the data starts at.
out:byte[]: the array the output data will be copied into.
outOff:int: the offset into the out array the output will start at.

Returns:int

the number of bytes processed and produced.

reset	back to summary
public void reset() Implements org.bouncycastle.crypto.BlockCipher.reset. Doc from org.bouncycastle.crypto.BlockCipher.reset. Reset the cipher. After resetting the cipher is in the same state as it was after the last init (if there was one).

reset

back to summary

public void reset()

Implements org.bouncycastle.crypto.BlockCipher.reset.

Doc from org.bouncycastle.crypto.BlockCipher.reset.

Reset the cipher. After resetting the cipher is in the same state as it was after the last init (if there was one).

rotateLeft	back to summary
private int rotateLeft(int x, int y) Perform a left "spin" of the word. The rotation of the given word x is rotated left by y bits. Only the lg(32) low-order bits of y are used to determine the rotation amount. Here it is assumed that the wordsize used is a power of 2. Parameters x:int word to rotate y:int number of bits to rotate % 32

rotateLeft

back to summary

private int rotateLeft(int x, int y)

Perform a left "spin" of the word. The rotation of the given word x is rotated left by y bits. Only the lg(32) low-order bits of y are used to determine the rotation amount. Here it is assumed that the wordsize used is a power of 2.

Parameters

x:int: word to rotate
y:int: number of bits to rotate % 32

rotateRight	back to summary
private int rotateRight(int x, int y) Perform a right "spin" of the word. The rotation of the given word x is rotated left by y bits. Only the lg(32) low-order bits of y are used to determine the rotation amount. Here it is assumed that the wordsize used is a power of 2. Parameters x:int word to rotate y:int number of bits to rotate % 32

rotateRight

back to summary

private int rotateRight(int x, int y)

Perform a right "spin" of the word. The rotation of the given word x is rotated left by y bits. Only the lg(32) low-order bits of y are used to determine the rotation amount. Here it is assumed that the wordsize used is a power of 2.

Parameters

x:int: word to rotate
y:int: number of bits to rotate % 32

setKey	back to summary
private void setKey(byte[] key) Re-key the cipher. Parameters key:byte[] the key to be used

setKey

back to summary

private void setKey(byte[] key)

Re-key the cipher.

Parameters

key:byte[]: the key to be used

wordToBytes	back to summary
private void wordToBytes(int word, byte[] dst, int dstOff)

public Class RC532Engine

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Method Detail