Package org.bouncycastle.crypto.modes

Class PaddedBlockCipher

  • public class PaddedBlockCipher
extends BufferedBlockCipher
    Deprecated.
    use org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher instead.
    A wrapper class that allows block ciphers to be used to process data in a piecemeal fashion with PKCS5/PKCS7 padding. The PaddedBlockCipher outputs a block only when the buffer is full and more data is being added, or on a doFinal (unless the current block in the buffer is a pad block). The padding mechanism used is the one outlined in PKCS5/PKCS7.

    • Constructor Detail

      • PaddedBlockCipher

        public PaddedBlockCipher​(BlockCipher cipher)
        Deprecated.
        Create a buffered block cipher with, or without, padding.
        Parameters:
        cipher - the underlying block cipher this buffering object wraps.

    • Method Detail

      • getOutputSize

        public int getOutputSize​(int len)
        Deprecated.
        return the size of the output buffer required for an update plus a doFinal with an input of len bytes.
        Overrides:
        getOutputSize in class BufferedBlockCipher
        Parameters:
        len - the length of the input.
        Returns:
        the space required to accommodate a call to update and doFinal with len bytes of input.

      • getUpdateOutputSize

        public int getUpdateOutputSize​(int len)
        Deprecated.
        return the size of the output buffer required for an update an input of len bytes.
        Overrides:
        getUpdateOutputSize in class BufferedBlockCipher
        Parameters:
        len - the length of the input.
        Returns:
        the space required to accommodate a call to update with len bytes of input.

      • processByte

        public int processByte​(byte in,
                       byte[] out,
                       int outOff)
                throws DataLengthException,
                       java.lang.IllegalStateException
        Deprecated.
        process a single byte, producing an output block if neccessary.
        Overrides:
        processByte in class BufferedBlockCipher
        Parameters:
        in - the input byte.
        out - the space for any output that might be produced.
        outOff - the offset from which the output will be copied.
        Returns:
        the number of output bytes copied to out.
        Throws:
        DataLengthException - if there isn't enough space in out.
        java.lang.IllegalStateException - if the cipher isn't initialised.

      • processBytes

        public int processBytes​(byte[] in,
                        int inOff,
                        int len,
                        byte[] out,
                        int outOff)
                 throws DataLengthException,
                        java.lang.IllegalStateException
        Deprecated.
        process an array of bytes, producing output if necessary.
        Overrides:
        processBytes in class BufferedBlockCipher
        Parameters:
        in - the input byte array.
        inOff - the offset at which the input data starts.
        len - the number of bytes to be copied out of the input array.
        out - the space for any output that might be produced.
        outOff - the offset from which the output will be copied.
        Returns:
        the number of output bytes copied to out.
        Throws:
        DataLengthException - if there isn't enough space in out.
        java.lang.IllegalStateException - if the cipher isn't initialised.

      • doFinal

        public int doFinal​(byte[] out,
                   int outOff)
            throws DataLengthException,
                   java.lang.IllegalStateException,
                   InvalidCipherTextException
        Deprecated.
        Process the last block in the buffer. If the buffer is currently full and padding needs to be added a call to doFinal will produce 2 * getBlockSize() bytes.
        Overrides:
        doFinal in class BufferedBlockCipher
        Parameters:
        out - the array the block currently being held is copied into.
        outOff - the offset at which the copying starts.
        Returns:
        the number of output bytes copied to out.
        Throws:
        DataLengthException - if there is insufficient space in out for the output or we are decrypting and the input is not block size aligned.
        java.lang.IllegalStateException - if the underlying cipher is not initialised.
        InvalidCipherTextException - if padding is expected and not found.