Package org.bouncycastle.tls.crypto.impl.bc

Class BcChaCha20Poly1305

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected int additionalDataLength  
      protected org.bouncycastle.crypto.engines.ChaCha7539Engine cipher  
      protected boolean isEncrypting  
      protected org.bouncycastle.crypto.macs.Poly1305 mac  

    • Constructor Summary

      Constructors 
      Constructor Description
      BcChaCha20Poly1305​(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 getOutputSize​(int inputLength)
      Return the maximum size of the output for input of inputLength bytes.
      void init​(byte[] nonce, int macSize, byte[] additionalData)
      Initialise the parameters for the AEAD operator.
      protected void initMAC()  
      void setKey​(byte[] key, int keyOff, int keyLen)
      Set the key to be used by the AEAD cipher implementation supporting this service.
      protected void updateMAC​(byte[] buf, int off, int len)  

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • cipher

        protected final org.bouncycastle.crypto.engines.ChaCha7539Engine cipher

      • mac

        protected final org.bouncycastle.crypto.macs.Poly1305 mac

      • isEncrypting

        protected final boolean isEncrypting

      • additionalDataLength

        protected int additionalDataLength

    • Constructor Detail

      • BcChaCha20Poly1305

        public BcChaCha20Poly1305​(boolean isEncrypting)

    • Method Detail

      • doFinal

        public int doFinal​(byte[] input,
                   int inputOffset,
                   int inputLength,
                   byte[] output,
                   int outputOffset)
            throws java.io.IOException
        Description copied from interface: TlsAEADCipherImpl
        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 TlsAEADCipherImpl
        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.

      • getOutputSize

        public int getOutputSize​(int inputLength)
        Description copied from interface: TlsAEADCipherImpl
        Return the maximum size of the output for input of inputLength bytes.
        Specified by:
        getOutputSize in interface TlsAEADCipherImpl
        Parameters:
        inputLength - the length (in bytes) of the proposed input.
        Returns:
        the maximum size of the output.

      • init

        public void init​(byte[] nonce,
                 int macSize,
                 byte[] additionalData)
          throws java.io.IOException
        Description copied from interface: TlsAEADCipherImpl
        Initialise the parameters for the AEAD operator.
        Specified by:
        init in interface TlsAEADCipherImpl
        Parameters:
        nonce - the nonce.
        macSize - MAC size in bytes.
        additionalData - any additional data to be included in the MAC calculation.
        Throws:
        java.io.IOException - if the parameters are inappropriate.

      • setKey

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

      • initMAC

        protected void initMAC()

      • updateMAC

        protected void updateMAC​(byte[] buf,
                         int off,
                         int len)