Package org.bouncycastle.crypto

Interface StreamCipher

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      java.lang.String getAlgorithmName()
      Return the name of the algorithm the cipher implements.
      void init​(boolean forEncryption, CipherParameters params)
      Initialise the cipher.
      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.

    • Method Detail

      • init

        void init​(boolean forEncryption,
          CipherParameters params)
   throws java.lang.IllegalArgumentException
        Initialise the cipher.
        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

        java.lang.String getAlgorithmName()
        Return the name of the algorithm the cipher implements.
        Returns:
        the name of the algorithm the cipher implements.

      • returnByte

        byte returnByte​(byte in)
        encrypt/decrypt a single byte returning the result.
        Parameters:
        in - the byte to be processed.
        Returns:
        the result of processing the input byte.

      • processBytes

        int processBytes​(byte[] in,
                 int inOff,
                 int len,
                 byte[] out,
                 int outOff)
          throws DataLengthException
        process a block of bytes from in putting the result into out.
        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

        void reset()
        reset the cipher. This leaves it in the same state it was at after the last init (if there was one).