Package org.bouncycastle.tls.crypto.impl

Interface TlsSuiteMac

All Known Implementing Classes:
TlsSuiteHMac
public interface TlsSuiteMac
Base interface for a generic TLS MAC implementation for use with a bulk cipher.

  • Method Summary

    Modifier and Type
    Method
    Description
    byte[]
    calculateMac(long seqNo, short type, byte[] connectionID, byte[] message, int offset, int length)
    Calculate the MAC for some given data.
    byte[]
    calculateMacConstantTime(long seqNo, short type, byte[] connectionID, byte[] message, int offset, int length, int expectedLength, byte[] randomData)
    Constant time calculation of the MAC for some given data with a given expected length.
    int
    getSize()
    Return the output length (in bytes) of this MAC.

  • Method Details

    • getSize

      int getSize()
      Return the output length (in bytes) of this MAC.
      Returns:
      The output length of this MAC.

    • calculateMac

      byte[] calculateMac(long seqNo, short type, byte[] connectionID, byte[] message, int offset, int length)
      Calculate the MAC for some given data.
      Parameters:
      seqNo - The sequence number of the record.
      type - The content type of the message.
      message - A byte array containing the message.
      offset - The number of bytes to skip, before the message starts.
      length - The length of the message.
      Returns:
      A new byte array containing the MAC value.

    • calculateMacConstantTime

      byte[] calculateMacConstantTime(long seqNo, short type, byte[] connectionID, byte[] message, int offset, int length, int expectedLength, byte[] randomData)
      Constant time calculation of the MAC for some given data with a given expected length.
      Parameters:
      seqNo - The sequence number of the record.
      type - The content type of the message.
      message - A byte array containing the message.
      offset - The number of bytes to skip, before the message starts.
      length - The length of the message.
      expectedLength - The expected length of the full message.
      randomData - Random data for padding out the MAC calculation if required.
      Returns:
      A new byte array containing the MAC value.