Package org.bouncycastle.crypto.engines

Class AESNativeCTR

    • Constructor Summary

      Constructors 
      Constructor Description
      AESNativeCTR()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.String getAlgorithmName()
      Return the name of the algorithm the cipher implements.
      int getBlockSize()
      Return the block size for this cipher (in bytes).
      int getMultiBlockSize()
      Return the multi-block size for this cipher (in bytes).
      long getPosition()
      Return the current "position" of the cipher
      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.
      int processBlocks​(byte[] in, int inOff, int blockCount, byte[] out, int outOff)
      Process blockCount blocks from input in offset inOff and place the output in out from offset outOff.
      int processBytes​(byte[] in, int inOff, int len, byte[] out, int outOff)
      process a block of bytes from in putting the result into out.
      void reset()
      reset the cipher.
      byte returnByte​(byte in)
      encrypt/decrypt a single byte returning the result.
      long seekTo​(long position)
      Reset the cipher and then skip forward to a given position.
      long skip​(long numberOfBytes)
      Skip numberOfBytes forwards, or backwards.
      java.lang.String toString()  

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Constructor Detail

      • AESNativeCTR

        public AESNativeCTR()

    • Method Detail

      • getBlockSize

        public int getBlockSize()
        Description copied from interface: BlockCipher
        Return the block size for this cipher (in bytes).
        Specified by:
        getBlockSize in interface BlockCipher
        Returns:
        the block size for this cipher in bytes.

      • processBlock

        public int processBlock​(byte[] in,
                        int inOff,
                        byte[] out,
                        int outOff)
                 throws DataLengthException,
                        java.lang.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 interface BlockCipher
        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 input , or space in out.
        java.lang.IllegalStateException - if the cipher isn't initialised.

      • getMultiBlockSize

        public int getMultiBlockSize()
        Description copied from interface: MultiBlockCipher
        Return the multi-block size for this cipher (in bytes).
        Specified by:
        getMultiBlockSize in interface MultiBlockCipher
        Returns:
        the multi-block size for this cipher in bytes.

      • processBlocks

        public int processBlocks​(byte[] in,
                         int inOff,
                         int blockCount,
                         byte[] out,
                         int outOff)
                  throws DataLengthException,
                         java.lang.IllegalStateException
        Description copied from interface: MultiBlockCipher
        Process blockCount blocks from input in offset inOff and place the output in out from offset outOff.
        Specified by:
        processBlocks in interface MultiBlockCipher
        Parameters:
        in - input data array.
        inOff - start of input data in in.
        blockCount - number of blocks to be processed.
        out - output data array.
        outOff - start position for output data.
        Returns:
        number of bytes written to out.
        Throws:
        DataLengthException
        java.lang.IllegalStateException

      • skip

        public long skip​(long numberOfBytes)
        Description copied from interface: SkippingCipher
        Skip numberOfBytes forwards, or backwards.
        Specified by:
        skip in interface SkippingCipher
        Parameters:
        numberOfBytes - the number of bytes to skip (positive forward, negative backwards).
        Returns:
        the number of bytes actually skipped.

      • seekTo

        public long seekTo​(long position)
        Description copied from interface: SkippingCipher
        Reset the cipher and then skip forward to a given position.
        Specified by:
        seekTo in interface SkippingCipher
        Parameters:
        position - the number of bytes in to set the cipher state to.
        Returns:
        the byte position moved to.

      • getPosition

        public long getPosition()
        Description copied from interface: SkippingCipher
        Return the current "position" of the cipher
        Specified by:
        getPosition in interface SkippingCipher
        Returns:
        the current byte position.

      • init

        public void init​(boolean forEncryption,
                 CipherParameters params)
          throws java.lang.IllegalArgumentException
        Description copied from interface: StreamCipher
        Initialise the cipher.
        Specified by:
        init in interface BlockCipher
        Specified by:
        init in interface StreamCipher
        Parameters:
        forEncryption - if true the cipher is initialised for encryption, if false for decryption.
        params - the key and other data required by the cipher.
        Throws:
        java.lang.IllegalArgumentException - if the params argument is inappropriate.

      • getAlgorithmName

        public java.lang.String getAlgorithmName()
        Description copied from interface: StreamCipher
        Return the name of the algorithm the cipher implements.
        Specified by:
        getAlgorithmName in interface BlockCipher
        Specified by:
        getAlgorithmName in interface StreamCipher
        Returns:
        the name of the algorithm the cipher implements.

      • returnByte

        public byte returnByte​(byte in)
        Description copied from interface: StreamCipher
        encrypt/decrypt a single byte returning the result.
        Specified by:
        returnByte in interface StreamCipher
        Parameters:
        in - the byte to be processed.
        Returns:
        the result of processing the input byte.

      • processBytes

        public int processBytes​(byte[] in,
                        int inOff,
                        int len,
                        byte[] out,
                        int outOff)
                 throws DataLengthException
        Description copied from interface: StreamCipher
        process a block of bytes from in putting the result into out.
        Specified by:
        processBytes in interface StreamCipher
        Parameters:
        in - the input byte array.
        inOff - the offset into the in array where the data to be processed starts.
        len - the number of bytes to be processed.
        out - the output buffer the processed bytes go into.
        outOff - the offset into the output byte array the processed data starts at.
        Returns:
        the number of bytes produced - should always be len.
        Throws:
        DataLengthException - if the output buffer is too small.

      • reset

        public void reset()
        Description copied from interface: StreamCipher
        reset the cipher. This leaves it in the same state it was at after the last init (if there was one).
        Specified by:
        reset in interface BlockCipher
        Specified by:
        reset in interface StreamCipher

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object