Package org.bouncycastle.tls.crypto.impl.jcajce

Class JceBlockCipherWithCBCImplicitIVImpl

  • All Implemented Interfaces:
    TlsBlockCipherImpl
    public class JceBlockCipherWithCBCImplicitIVImpl
extends java.lang.Object
implements TlsBlockCipherImpl
    A basic wrapper for a JCE Cipher class to provide the needed block cipher functionality for TLS where the cipher requires the IV to be continued between calls.

    • Constructor Summary

      Constructors 
      Constructor Description
      JceBlockCipherWithCBCImplicitIVImpl​(javax.crypto.Cipher cipher, java.lang.String algorithm, boolean isEncrypting)  

    • Method Summary

      All Methods Instance Methods Concrete 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.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • JceBlockCipherWithCBCImplicitIVImpl

        public JceBlockCipherWithCBCImplicitIVImpl​(javax.crypto.Cipher cipher,
                                           java.lang.String algorithm,
                                           boolean isEncrypting)
                                    throws java.security.GeneralSecurityException
        Throws:
        java.security.GeneralSecurityException

    • Method Detail

      • setKey

        public void setKey​(byte[] key,
                   int keyOff,
                   int keyLen)
        Description copied from interface: TlsBlockCipherImpl
        Set the key to be used by the block cipher implementation supporting this service.
        Specified by:
        setKey in interface TlsBlockCipherImpl
        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.

      • init

        public void init​(byte[] iv,
                 int ivOff,
                 int ivLen)
        Description copied from interface: TlsBlockCipherImpl
        Initialise the parameters for operator.
        Specified by:
        init in interface TlsBlockCipherImpl
        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.

      • doFinal

        public int doFinal​(byte[] input,
                   int inputOffset,
                   int inputLength,
                   byte[] output,
                   int outputOffset)
        Description copied from interface: TlsBlockCipherImpl
        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.

        Specified by:
        doFinal in interface TlsBlockCipherImpl
        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.

      • getBlockSize

        public int getBlockSize()
        Description copied from interface: TlsBlockCipherImpl
        Return the blocksize (in bytes) of the underlying block cipher.
        Specified by:
        getBlockSize in interface TlsBlockCipherImpl
        Returns:
        the cipher's blocksize.