Class SICBlockCipher
java.lang.Object
org.gudy.bouncycastle.crypto.modes.SICBlockCipher
- All Implemented Interfaces:
BlockCipher
Implements the Segmented Integer Counter (SIC) mode on top of a simple
block cipher. This mode is also known as CTR mode.
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate int
private BlockCipher
private byte[]
private byte[]
private boolean
private byte[]
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionReturn the name of the algorithm the cipher implements.int
Return the block size for this cipher (in bytes).return the underlying block cipher that we are wrapping.void
init
(boolean forEncryption, CipherParameters params) Initialise the cipher.int
processBlock
(byte[] in, int inOff, byte[] out, int outOff) Process one block of input from the array in and write it to the out array.void
reset()
Reset the cipher.
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Field Details
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cipher
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blockSize
private int blockSize -
IV
private byte[] IV -
counter
private byte[] counter -
counterOut
private byte[] counterOut -
encrypting
private boolean encrypting
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Constructor Details
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SICBlockCipher
Basic constructor.- Parameters:
c
- the block cipher to be used.
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Method Details
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getUnderlyingCipher
return the underlying block cipher that we are wrapping.- Returns:
- the underlying block cipher that we are wrapping.
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init
Description copied from interface:BlockCipher
Initialise the cipher.- Specified by:
init
in interfaceBlockCipher
- Parameters:
forEncryption
- if true the cipher is initialised for encryption, if false for decryption.- Throws:
IllegalArgumentException
- if the params argument is inappropriate.
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getAlgorithmName
Description copied from interface:BlockCipher
Return the name of the algorithm the cipher implements.- Specified by:
getAlgorithmName
in interfaceBlockCipher
- Returns:
- the name of the algorithm the cipher implements.
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getBlockSize
public int getBlockSize()Description copied from interface:BlockCipher
Return the block size for this cipher (in bytes).- Specified by:
getBlockSize
in interfaceBlockCipher
- Returns:
- the block size for this cipher in bytes.
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processBlock
public int processBlock(byte[] in, int inOff, byte[] out, int outOff) throws DataLengthException, IllegalStateException Description copied from interface:BlockCipher
Process one block of input from the array in and write it to the out array.- Specified by:
processBlock
in interfaceBlockCipher
- Parameters:
in
- the array containing the input data.inOff
- offset into the in array the data starts at.out
- the array the output data will be copied into.outOff
- the offset into the out array the output will start at.- Returns:
- the number of bytes processed and produced.
- Throws:
DataLengthException
- if there isn't enough data in in, or space in out.IllegalStateException
- if the cipher isn't initialised.
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reset
public void reset()Description copied from interface:BlockCipher
Reset the cipher. After resetting the cipher is in the same state as it was after the last init (if there was one).- Specified by:
reset
in interfaceBlockCipher
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