Bouncy Castle Cryptography Library 1.80 · org.bouncycastle.crypto.engines.LEAEngine

Field Summary

Modifier and Type	Field and Description
private static final int	BASEROUNDS Base number of rounds.
private static final int	BLOCKSIZE BlockSize.
private static final int[]	DELTA Delta values.
private boolean	forEncryption Are we encrypting?
private static final int	KEY0 keyIndex0.
private static final int	KEY1 keyIndex1.
private static final int	KEY2 keyIndex2.
private static final int	KEY3 keyIndex3.
private static final int	KEY4 keyIndex4.
private static final int	KEY5 keyIndex5.
private static final int	MASK128 Mask for mod 4.
private static final int	MASK256 Mask for mod 8.
private static final int	NUMWORDS Number of words in state.
private static final int	NUMWORDS128 Number of words in 128-bit key.
private static final int	NUMWORDS192 Number of words in 192-bit key.
private static final int	NUMWORDS256 Number of words in 256-bit key.
private static final int	ROT1 Rotate1.
private static final int	ROT11 Rotate11.
private static final int	ROT13 Rotate13.
private static final int	ROT17 Rotate17.
private static final int	ROT3 Rotate3.
private static final int	ROT5 Rotate5.
private static final int	ROT6 Rotate6.
private static final int	ROT9 Rotate9.
private final int[]	theBlock The work buffer.
private int[][]	theRoundKeys The round keys.
private int	theRounds The # of rounds.

Constructor Summary

Access	Constructor and Description
public	LEAEngine() Constructor.

Method Summary

Modifier and Type	Method and Description
private static int	Returns: the length bufLength(final byte[] the buffer pBuffer) Obtain buffer length (allowing for null).
private static void	checkBuffer(final byte[] the buffer pBuffer, final int the offset pOffset, final boolean is this an output buffer? pOutput) Check buffer.
private int	Returns: the bytes processed decryptBlock(final byte[] the input buffer pInput, final int the input offset pInOff, final byte[] the output offset pOutput, final int the output offset pOutOff) Decrypt a block.
private void	decryptRound(final int the round# pRound) Decrypt a round.
private int	Returns: the bytes processed encryptBlock(final byte[] the input buffer pInput, final int the input offset pInOff, final byte[] the output offset pOutput, final int the output offset pOutOff) Encrypt a block.
private void	encryptRound(final int the round# pRound) Encrypt a round.
private void	generate128RoundKeys(final int[] the working keys pWork) Generate the round keys from 128-bit key.
private void	generate192RoundKeys(final int[] the working keys pWork) Generate the round keys from 192-bit key.
private void	generate256RoundKeys(final int[] the working keys pWork) Generate the round keys from 256-bit key.
private void	generateRoundKeys(final byte[] the key pKey) Generate the round keys.
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(final boolean if true the cipher is initialised for encryption, if false for decryption. pEncrypt, final CipherParameters the key and other data required by the cipher. pParams) Implements org.bouncycastle.crypto.BlockCipher.init. Initialise the cipher.
private static int	Returns: the left of an index leftIndex(final int the index pIndex) Return the left of an index.
public int	processBlock(final byte[] the array containing the input data. pInput, final int offset into the in array the data starts at. pInOff, final byte[] the array the output data will be copied into. pOutput, final int the offset into the out array the output will start at. pOutOff) 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 static int	Returns: the left of an index rightIndex(final int the index pIndex) Return the left of an index.
private static int	Returns: the rotated value rol32(final int the value to rotate pValue, final int the # of bits to rotate pBits) rotate left.
private static int	Returns: the rotated value ror32(final int the value to rotate pValue, final int the # of bits to rotate pBits) rotate right.

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

Field Detail

BASEROUNDS	back to summary
private static final int BASEROUNDS Base number of rounds.

BLOCKSIZE	back to summary
private static final int BLOCKSIZE BlockSize.

DELTA	back to summary
private static final int[] DELTA Delta values.

forEncryption	back to summary
private boolean forEncryption Are we encrypting?

KEY0	back to summary
private static final int KEY0 keyIndex0.

KEY1	back to summary
private static final int KEY1 keyIndex1.

KEY2	back to summary
private static final int KEY2 keyIndex2.

KEY3	back to summary
private static final int KEY3 keyIndex3.

KEY4	back to summary
private static final int KEY4 keyIndex4.

KEY5	back to summary
private static final int KEY5 keyIndex5.

MASK128	back to summary
private static final int MASK128 Mask for mod 4.

MASK256	back to summary
private static final int MASK256 Mask for mod 8.

NUMWORDS	back to summary
private static final int NUMWORDS Number of words in state.

NUMWORDS128	back to summary
private static final int NUMWORDS128 Number of words in 128-bit key.

NUMWORDS192	back to summary
private static final int NUMWORDS192 Number of words in 192-bit key.

NUMWORDS256	back to summary
private static final int NUMWORDS256 Number of words in 256-bit key.

ROT1	back to summary
private static final int ROT1 Rotate1.

ROT11	back to summary
private static final int ROT11 Rotate11.

ROT13	back to summary
private static final int ROT13 Rotate13.

ROT17	back to summary
private static final int ROT17 Rotate17.

ROT3	back to summary
private static final int ROT3 Rotate3.

ROT5	back to summary
private static final int ROT5 Rotate5.

ROT6	back to summary
private static final int ROT6 Rotate6.

ROT9	back to summary
private static final int ROT9 Rotate9.

theBlock	back to summary
private final int[] theBlock The work buffer.

theRoundKeys	back to summary
private int[][] theRoundKeys The round keys.

theRounds	back to summary
private int theRounds The # of rounds.

Constructor Detail

LEAEngine	back to summary
public LEAEngine() Constructor.

Method Detail

bufLength	back to summary
private static int bufLength(final byte[] pBuffer) Obtain buffer length (allowing for null). Parameters pBuffer:byte[] the buffer Returns:int the length

bufLength

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private static int bufLength(final byte[] pBuffer)

Obtain buffer length (allowing for null).

Parameters

pBuffer:byte[]: the buffer

Returns:int

the length

checkBuffer	back to summary
private static void checkBuffer(final byte[] pBuffer, final int pOffset, final boolean pOutput) Check buffer. Parameters pBuffer:byte[] the buffer pOffset:int the offset pOutput:boolean is this an output buffer?

checkBuffer

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private static void checkBuffer(final byte[] pBuffer, final int pOffset, final boolean pOutput)

Check buffer.

Parameters

pBuffer:byte[]: the buffer
pOffset:int: the offset
pOutput:boolean: is this an output buffer?

decryptBlock	back to summary
private int decryptBlock(final byte[] pInput, final int pInOff, final byte[] pOutput, final int pOutOff) Decrypt a block. Parameters pInput:byte[] the input buffer pInOff:int the input offset pOutput:byte[] the output offset pOutOff:int the output offset Returns:int the bytes processed

decryptBlock

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private int decryptBlock(final byte[] pInput, final int pInOff, final byte[] pOutput, final int pOutOff)

Decrypt a block.

Parameters

pInput:byte[]: the input buffer
pInOff:int: the input offset
pOutput:byte[]: the output offset
pOutOff:int: the output offset

Returns:int

the bytes processed

decryptRound	back to summary
private void decryptRound(final int pRound) Decrypt a round. Parameters pRound:int the round#

decryptRound

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private void decryptRound(final int pRound)

Decrypt a round.

Parameters

pRound:int: the round#

encryptBlock	back to summary
private int encryptBlock(final byte[] pInput, final int pInOff, final byte[] pOutput, final int pOutOff) Encrypt a block. Parameters pInput:byte[] the input buffer pInOff:int the input offset pOutput:byte[] the output offset pOutOff:int the output offset Returns:int the bytes processed

encryptBlock

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private int encryptBlock(final byte[] pInput, final int pInOff, final byte[] pOutput, final int pOutOff)

Encrypt a block.

Parameters

pInput:byte[]: the input buffer
pInOff:int: the input offset
pOutput:byte[]: the output offset
pOutOff:int: the output offset

Returns:int

the bytes processed

encryptRound	back to summary
private void encryptRound(final int pRound) Encrypt a round. Parameters pRound:int the round#

encryptRound

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private void encryptRound(final int pRound)

Encrypt a round.

Parameters

pRound:int: the round#

generate128RoundKeys	back to summary
private void generate128RoundKeys(final int[] pWork) Generate the round keys from 128-bit key. Parameters pWork:int[] the working keys

generate128RoundKeys

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private void generate128RoundKeys(final int[] pWork)

Generate the round keys from 128-bit key.

Parameters

pWork:int[]: the working keys

generate192RoundKeys	back to summary
private void generate192RoundKeys(final int[] pWork) Generate the round keys from 192-bit key. Parameters pWork:int[] the working keys

generate192RoundKeys

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private void generate192RoundKeys(final int[] pWork)

Generate the round keys from 192-bit key.

Parameters

pWork:int[]: the working keys

generate256RoundKeys	back to summary
private void generate256RoundKeys(final int[] pWork) Generate the round keys from 256-bit key. Parameters pWork:int[] the working keys

generate256RoundKeys

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private void generate256RoundKeys(final int[] pWork)

Generate the round keys from 256-bit key.

Parameters

pWork:int[]: the working keys

generateRoundKeys	back to summary
private void generateRoundKeys(final byte[] pKey) Generate the round keys. Parameters pKey:byte[] the key

generateRoundKeys

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private void generateRoundKeys(final byte[] pKey)

Generate the round keys.

Parameters

pKey:byte[]: the key

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

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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(final boolean pEncrypt, final CipherParameters pParams) Implements org.bouncycastle.crypto.BlockCipher.init. Doc from org.bouncycastle.crypto.BlockCipher.init. Initialise the cipher. Parameters pEncrypt:boolean if true the cipher is initialised for encryption, if false for decryption. pParams:CipherParameters the key and other data required by the cipher.

init

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public void init(final boolean pEncrypt, final CipherParameters pParams)

Implements org.bouncycastle.crypto.BlockCipher.init.

Doc from org.bouncycastle.crypto.BlockCipher.init.

Initialise the cipher.

Parameters

pEncrypt:boolean: if true the cipher is initialised for encryption, if false for decryption.
pParams:CipherParameters: the key and other data required by the cipher.

leftIndex	back to summary
private static int leftIndex(final int pIndex) Return the left of an index. Parameters pIndex:int the index Returns:int the left of an index

leftIndex

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private static int leftIndex(final int pIndex)

Return the left of an index.

Parameters

pIndex:int: the index

Returns:int

the left of an index

processBlock	back to summary
public int processBlock(final byte[] pInput, final int pInOff, final byte[] pOutput, final int pOutOff) 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 pInput:byte[] the array containing the input data. pInOff:int offset into the in array the data starts at. pOutput:byte[] the array the output data will be copied into. pOutOff:int the offset into the out array the output will start at. Returns:int the number of bytes processed and produced.

processBlock

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public int processBlock(final byte[] pInput, final int pInOff, final byte[] pOutput, final int pOutOff)

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

pInput:byte[]: the array containing the input data.
pInOff:int: offset into the in array the data starts at.
pOutput:byte[]: the array the output data will be copied into.
pOutOff: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

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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).

rightIndex	back to summary
private static int rightIndex(final int pIndex) Return the left of an index. Parameters pIndex:int the index Returns:int the left of an index

rightIndex

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private static int rightIndex(final int pIndex)

Return the left of an index.

Parameters

pIndex:int: the index

Returns:int

the left of an index

rol32	back to summary
private static int rol32(final int pValue, final int pBits) rotate left. Parameters pValue:int the value to rotate pBits:int the # of bits to rotate Returns:int the rotated value

rol32

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private static int rol32(final int pValue, final int pBits)

rotate left.

Parameters

pValue:int: the value to rotate
pBits:int: the # of bits to rotate

Returns:int

the rotated value

ror32	back to summary
private static int ror32(final int pValue, final int pBits) rotate right. Parameters pValue:int the value to rotate pBits:int the # of bits to rotate Returns:int the rotated value

ror32

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private static int ror32(final int pValue, final int pBits)

rotate right.

Parameters

pValue:int: the value to rotate
pBits:int: the # of bits to rotate

Returns:int

the rotated value

public Class LEAEngine

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