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

Class JceTlsHMAC

  • All Implemented Interfaces:
    TlsHMAC, TlsMAC
    public class JceTlsHMAC
extends java.lang.Object
implements TlsHMAC
    Wrapper class for a JCE MAC based on HMAC to provide the necessary operations for TLS.

    • Constructor Summary

      Constructors 
      Constructor Description
      JceTlsHMAC​(javax.crypto.Mac hmac, java.lang.String algorithm)
      Base constructor.
      JceTlsHMAC​(javax.crypto.Mac hmac, java.lang.String algorithm, int internalBlockSize)
      Base constructor specifying the internal block size.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      byte[] calculateMAC()
      Return calculated MAC for any input passed in.
      void calculateMAC​(byte[] output, int outOff)
      Write the calculated MAC to an output buffer.
      int getInternalBlockSize()
      Return the internal block size for the message digest underlying this HMAC service.
      int getMacLength()
      Return the length of the MAC generated by this service.
      void reset()
      Reset the MAC underlying this service.
      void setKey​(byte[] key, int keyOff, int keyLen)
      Set the key to be used by the MAC implementation supporting this service.
      void update​(byte[] input, int inOff, int length)
      Update the MAC with the passed in input.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • JceTlsHMAC

        public JceTlsHMAC​(javax.crypto.Mac hmac,
                  java.lang.String algorithm)
        Base constructor.
        Parameters:
        hmac - MAC implementation.
        algorithm - algorithm name to use for keys and to get the internal block size.

      • JceTlsHMAC

        public JceTlsHMAC​(javax.crypto.Mac hmac,
                  java.lang.String algorithm,
                  int internalBlockSize)
        Base constructor specifying the internal block size.
        Parameters:
        hmac - MAC implementation.
        algorithm - algorithm name to use for keys and to get the internal block size.
        internalBlockSize - internal block size of the message digest underlying the HMAC.

    • Method Detail

      • setKey

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

      • update

        public void update​(byte[] input,
                   int inOff,
                   int length)
        Description copied from interface: TlsMAC
        Update the MAC with the passed in input.
        Specified by:
        update in interface TlsMAC
        Parameters:
        input - input array containing the data.
        inOff - offset into the input array the input starts at.
        length - the length of the input data.

      • calculateMAC

        public byte[] calculateMAC()
        Description copied from interface: TlsMAC
        Return calculated MAC for any input passed in.
        Specified by:
        calculateMAC in interface TlsMAC
        Returns:
        the MAC value.

      • calculateMAC

        public void calculateMAC​(byte[] output,
                         int outOff)
        Description copied from interface: TlsMAC
        Write the calculated MAC to an output buffer.
        Specified by:
        calculateMAC in interface TlsMAC
        Parameters:
        output - output array to write the MAC to.
        outOff - offset into the output array to write the MAC to.

      • getInternalBlockSize

        public int getInternalBlockSize()
        Description copied from interface: TlsHMAC
        Return the internal block size for the message digest underlying this HMAC service.
        Specified by:
        getInternalBlockSize in interface TlsHMAC
        Returns:
        the internal block size for the digest (in bytes).

      • getMacLength

        public int getMacLength()
        Description copied from interface: TlsMAC
        Return the length of the MAC generated by this service.
        Specified by:
        getMacLength in interface TlsMAC
        Returns:
        the MAC length.

      • reset

        public void reset()
        Description copied from interface: TlsMAC
        Reset the MAC underlying this service.
        Specified by:
        reset in interface TlsMAC