Package org.bouncycastle.tls.crypto.impl

Interface TlsBlockCipherImpl

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      int doFinal​(byte[] input, int inputOffset, int inputLength, byte[] output, int outputOffset)
      Perform the cipher encryption/decryption returning the output in output.
      int getBlockSize()
      Return the blocksize (in bytes) of the underlying block cipher.
      void init​(byte[] iv, int ivOff, int ivLen)
      Initialise the parameters for operator.
      void setKey​(byte[] key, int keyOff, int keyLen)
      Set the key to be used by the block cipher implementation supporting this service.

    • Method Detail

      • setKey

        void setKey​(byte[] key,
            int keyOff,
            int keyLen)
     throws java.io.IOException
        Set the key to be used by the block cipher implementation supporting this service.
        Parameters:
        key - array holding the block cipher key.
        keyOff - offset into the array the key starts at.
        keyLen - length of the key in the array.
        Throws:
        java.io.IOException

      • init

        void init​(byte[] iv,
          int ivOff,
          int ivLen)
   throws java.io.IOException
        Initialise the parameters for operator.
        Parameters:
        iv - array holding the initialization vector (IV).
        ivOff - offset into the array the IV starts at.
        ivLen - length of the IV in the array.
        Throws:
        java.io.IOException - if the parameters are inappropriate.

      • doFinal

        int doFinal​(byte[] input,
            int inputOffset,
            int inputLength,
            byte[] output,
            int outputOffset)
     throws java.io.IOException
        Perform the cipher encryption/decryption returning the output in output.

        Note: we have to use doFinal() here as it is the only way to guarantee output from the underlying cipher.

        Parameters:
        input - array holding input data to the cipher.
        inputOffset - offset into input array data starts at.
        inputLength - length of the input data in the array.
        output - array to hold the cipher output.
        outputOffset - offset into output array to start saving output.
        Returns:
        the amount of data written to output.
        Throws:
        java.io.IOException - in case of failure.

      • getBlockSize

        int getBlockSize()
        Return the blocksize (in bytes) of the underlying block cipher.
        Returns:
        the cipher's blocksize.