|
Bouncy Castle Cryptography 1.45 | ||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||
java.lang.Objectorg.bouncycastle.crypto.BufferedBlockCipher
org.bouncycastle.crypto.modes.CTSBlockCipher
public class CTSBlockCipher
A Cipher Text Stealing (CTS) mode cipher. CTS allows block ciphers to be used to produce cipher text which is the same length as the plain text.
| Field Summary |
|---|
| Fields inherited from class org.bouncycastle.crypto.BufferedBlockCipher |
|---|
buf, bufOff, cipher, forEncryption, partialBlockOkay, pgpCFB |
| Constructor Summary | |
|---|---|
CTSBlockCipher(BlockCipher cipher)
Create a buffered block cipher that uses Cipher Text Stealing |
|
| Method Summary | |
|---|---|
int |
doFinal(byte[] out,
int outOff)
Process the last block in the buffer. |
int |
getOutputSize(int len)
return the size of the output buffer required for an update plus a doFinal with an input of len bytes. |
int |
getUpdateOutputSize(int len)
return the size of the output buffer required for an update an input of len bytes. |
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. |
| Methods inherited from class org.bouncycastle.crypto.BufferedBlockCipher |
|---|
getBlockSize, getUnderlyingCipher, init, reset |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public CTSBlockCipher(BlockCipher cipher)
cipher - the underlying block cipher this buffering object wraps.| Method Detail |
|---|
public int getUpdateOutputSize(int len)
getUpdateOutputSize in class BufferedBlockCipherlen - the length of the input.
public int getOutputSize(int len)
getOutputSize in class BufferedBlockCipherlen - the length of the input.
public int processByte(byte in,
byte[] out,
int outOff)
throws DataLengthException,
java.lang.IllegalStateException
processByte in class BufferedBlockCipherin - 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
processBytes in class BufferedBlockCipherin - 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
doFinal in class BufferedBlockCipherout - 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.
java.lang.IllegalStateException - if the underlying cipher is not
initialised.
InvalidCipherTextException - if cipher text decrypts wrongly (in
case the exception will never get thrown).
|
Bouncy Castle Cryptography 1.45 | ||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||