Java Doc for CTSBlockCipher.java in  » Security » Bouncy-Castle » org » bouncycastle » crypto » modes » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Security » Bouncy Castle » org.bouncycastle.crypto.modes   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.bouncycastle.crypto.BufferedBlockCipher       org.bouncycastle.crypto.modes.CTSBlockCipher CTSBlockCipher public class CTSBlockCipher extends BufferedBlockCipher (Code) 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. Constructor Summary public   CTSBlockCipher(BlockCipher cipher)      Method Summary public  int doFinal(byte[] out, int outOff)      Process the last block in the buffer. Parameters:   out - the array the block currently being held is copied into. Parameters:   outOff - the offset at which the copying starts. public  int getOutputSize(int len)      return the size of the output buffer required for an update plus a doFinal with an input of len bytes. Parameters:   len - the length of the input. public  int getUpdateOutputSize(int len)      return the size of the output buffer required for an update an input of len bytes. Parameters:   len - the length of the input. public  int processByte(byte in, byte[] out, int outOff)      process a single byte, producing an output block if neccessary. Parameters:   in - the input byte. Parameters:   out - the space for any output that might be produced. Parameters:   outOff - the offset from which the output will be copied. public  int processBytes(byte[] in, int inOff, int len, byte[] out, int outOff)      process an array of bytes, producing output if necessary. Parameters:   in - the input byte array. Parameters:   inOff - the offset at which the input data starts. Parameters:   len - the number of bytes to be copied out of the input array. Parameters:   out - the space for any output that might be produced. Parameters:   outOff - the offset from which the output will be copied. Constructor Detail CTSBlockCipher public CTSBlockCipher(BlockCipher cipher)(Code) Create a buffered block cipher that uses Cipher Text Stealing Parameters:   cipher - the underlying block cipher this buffering object wraps. Method Detail doFinal public int doFinal(byte[] out, int outOff) throws DataLengthException, IllegalStateException, InvalidCipherTextException(Code) Process the last block in the buffer. Parameters:   out - the array the block currently being held is copied into. Parameters:   outOff - the offset at which the copying starts. the number of output bytes copied to out. exception:   DataLengthException - if there is insufficient space in out forthe output. exception:   IllegalStateException - if the underlying cipher is notinitialised. exception:   InvalidCipherTextException - if cipher text decrypts wrongly (incase the exception will never get thrown). getOutputSize public int getOutputSize(int len)(Code) return the size of the output buffer required for an update plus a doFinal with an input of len bytes. Parameters:   len - the length of the input. the space required to accommodate a call to update and doFinalwith len bytes of input. getUpdateOutputSize public int getUpdateOutputSize(int len)(Code) return the size of the output buffer required for an update an input of len bytes. Parameters:   len - the length of the input. the space required to accommodate a call to updatewith len bytes of input. processByte public int processByte(byte in, byte[] out, int outOff) throws DataLengthException, IllegalStateException(Code) process a single byte, producing an output block if neccessary. Parameters:   in - the input byte. Parameters:   out - the space for any output that might be produced. Parameters:   outOff - the offset from which the output will be copied. the number of output bytes copied to out. exception:   DataLengthException - if there isn't enough space in out. exception:   IllegalStateException - if the cipher isn't initialised. processBytes public int processBytes(byte[] in, int inOff, int len, byte[] out, int outOff) throws DataLengthException, IllegalStateException(Code) process an array of bytes, producing output if necessary. Parameters:   in - the input byte array. Parameters:   inOff - the offset at which the input data starts. Parameters:   len - the number of bytes to be copied out of the input array. Parameters:   out - the space for any output that might be produced. Parameters:   outOff - the offset from which the output will be copied. the number of output bytes copied to out. exception:   DataLengthException - if there isn't enough space in out. exception:   IllegalStateException - if the cipher isn't initialised. Fields inherited from org.bouncycastle.crypto.BufferedBlockCipher protected byte[] buf(Code)(Java Doc) protected int bufOff(Code)(Java Doc) protected BlockCipher cipher(Code)(Java Doc) protected boolean forEncryption(Code)(Java Doc) protected boolean partialBlockOkay(Code)(Java Doc) protected boolean pgpCFB(Code)(Java Doc) Methods inherited from org.bouncycastle.crypto.BufferedBlockCipher public int doFinal(byte[] out, int outOff) throws DataLengthException, IllegalStateException, InvalidCipherTextException(Code)(Java Doc) public int getBlockSize()(Code)(Java Doc) public int getOutputSize(int len)(Code)(Java Doc) public BlockCipher getUnderlyingCipher()(Code)(Java Doc) public int getUpdateOutputSize(int len)(Code)(Java Doc) public void init(boolean forEncryption, CipherParameters params) throws IllegalArgumentException(Code)(Java Doc) public int processByte(byte in, byte[] out, int outOff) throws DataLengthException, IllegalStateException(Code)(Java Doc) public int processBytes(byte[] in, int inOff, int len, byte[] out, int outOff) throws DataLengthException, IllegalStateException(Code)(Java Doc) public void reset()(Code)(Java Doc) Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)