|
Bouncy Castle Cryptography 1.11 API Specification: Class BufferedBlockCipher
org.bouncycastle.crypto
|
Field Summary | |
protected byte[] |
buf
|
protected int |
bufOff
|
protected BlockCipher |
cipher
|
protected boolean |
forEncryption
|
protected boolean |
partialBlockOkay
|
Constructor Summary | |
protected |
BufferedBlockCipher()
constructor for subclasses |
|
BufferedBlockCipher(BlockCipher cipher)
Create a buffered block cipher without padding. |
Method Summary | |
int |
doFinal(byte[] out,
int outOff)
Process the last block in the buffer. |
int |
getBlockSize()
return the blocksize for the underlying cipher. |
int |
getOutputSize(int len)
return the size of the output buffer required for an update plus a doFinal with an input of len bytes. |
BlockCipher |
getUnderlyingCipher()
return the cipher this object wraps. |
int |
getUpdateOutputSize(int len)
return the size of the output buffer required for an update an input of len bytes. |
void |
init(boolean forEncryption,
CipherParameters params)
initialise the cipher. |
int |
processByte(byte in,
byte[] out,
int outOff)
process a single byte, producing an output block if neccessary. |
int |
processBytes(byte[] in,
int inOff,
int len,
byte[] out,
int outOff)
process an array of bytes, producing output if necessary. |
void |
reset()
Reset the buffer and cipher. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
protected byte[] buf
protected int bufOff
protected boolean forEncryption
protected BlockCipher cipher
protected boolean partialBlockOkay
Constructor Detail |
protected BufferedBlockCipher()
public BufferedBlockCipher(BlockCipher cipher)
cipher
- the underlying block cipher this buffering object wraps.padded
- true if the buffer should add, or remove, pad bytes,
false otherwise.Method Detail |
public BlockCipher getUnderlyingCipher()
public void init(boolean forEncryption, CipherParameters params) throws java.lang.IllegalArgumentException
forEncryption
- if true the cipher is initialised for
encryption, if false for decryption.param
- the key and other data required by the cipher.java.lang.IllegalArgumentException
- if the params argument is
inappropriate.public int getBlockSize()
public int getUpdateOutputSize(int len)
len
- the length of the input.public int getOutputSize(int len)
len
- the length of the input.public int processByte(byte in, byte[] out, int outOff) throws DataLengthException, java.lang.IllegalStateException
in
- the input byte.out
- the space for any output that might be produced.outOff
- the offset from which the output will be copied.DataLengthException
- if there isn't enough space in out.java.lang.IllegalStateException
- if the cipher isn't initialised.public int processBytes(byte[] in, int inOff, int len, byte[] out, int outOff) throws DataLengthException, java.lang.IllegalStateException
in
- the input byte array.inOff
- the offset at which the input data starts.len
- the number of bytes to be copied out of the input array.out
- the space for any output that might be produced.outOff
- the offset from which the output will be copied.DataLengthException
- if there isn't enough space in out.java.lang.IllegalStateException
- if the cipher isn't initialised.public int doFinal(byte[] out, int outOff) throws DataLengthException, java.lang.IllegalStateException, InvalidCipherTextException
out
- the array the block currently being held is copied into.outOff
- the offset at which the copying starts.DataLengthException
- if there is insufficient space in out for
the output, or the input is not block size aligned and should be.java.lang.IllegalStateException
- if the underlying cipher is not
initialised.InvalidCipherTextException
- if padding is expected and not found.DataLengthException
- if the input is not block size
aligned.public void reset()
|
Bouncy Castle Cryptography 1.11 | ||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |