Package org.bouncycastle.crypto.modes

Class G3413CFBBlockCipher

    • Constructor Detail

      • G3413CFBBlockCipher

        public G3413CFBBlockCipher​(BlockCipher cipher)
        Base constructor.
        Parameters:
        cipher - base cipher

      • G3413CFBBlockCipher

        public G3413CFBBlockCipher​(BlockCipher cipher,
                           int bitBlockSize)
        Base constructor with specific block size.
        Parameters:
        cipher - base cipher
        bitBlockSize - basic unit (defined as s)

    • Method Detail

      • init

        public void init​(boolean forEncryption,
                 CipherParameters params)
          throws java.lang.IllegalArgumentException
        Initialise the cipher and initialisation vector R. If an IV isn't passed as part of the parameter, the IV will be all zeros. An IV which is too short is handled in FIPS compliant fashion. R_init = IV, and R1 = R_init
        Parameters:
        forEncryption - ignored because encryption and decryption are same
        params - the key and other data required by the cipher.
        Throws:
        java.lang.IllegalArgumentException

      • getAlgorithmName

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

      • getBlockSize

        public int getBlockSize()
        Description copied from interface: BlockCipher
        Return the block size for this cipher (in bytes).
        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.
        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 in, or space in out.
        java.lang.IllegalStateException - if the cipher isn't initialised.

      • reset

        public void reset()
        copy R_init into R and reset the underlying cipher.