Package org.bouncycastle.crypto.signers

Class HMacDSAKCalculator

  • All Implemented Interfaces:
    DSAKCalculator
    public class HMacDSAKCalculator
extends java.lang.Object
implements DSAKCalculator
    A deterministic K calculator based on the algorithm in section 3.2 of RFC 6979.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void init​(java.math.BigInteger n, java.math.BigInteger d, byte[] message)
      Deterministic initialiser.
      void init​(java.math.BigInteger n, java.security.SecureRandom random)
      Non-deterministic initialiser.
      boolean isDeterministic()
      Return true if this calculator is deterministic, false otherwise.
      java.math.BigInteger nextK()
      Return the next valid value of K.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • HMacDSAKCalculator

        public HMacDSAKCalculator​(Digest digest)
        Base constructor.
        Parameters:
        digest - digest to build the HMAC on.

    • Method Detail

      • isDeterministic

        public boolean isDeterministic()
        Description copied from interface: DSAKCalculator
        Return true if this calculator is deterministic, false otherwise.
        Specified by:
        isDeterministic in interface DSAKCalculator
        Returns:
        true if deterministic, otherwise false.

      • init

        public void init​(java.math.BigInteger n,
                 java.security.SecureRandom random)
        Description copied from interface: DSAKCalculator
        Non-deterministic initialiser.
        Specified by:
        init in interface DSAKCalculator
        Parameters:
        n - the order of the DSA group.
        random - a source of randomness.

      • init

        public void init​(java.math.BigInteger n,
                 java.math.BigInteger d,
                 byte[] message)
        Description copied from interface: DSAKCalculator
        Deterministic initialiser.
        Specified by:
        init in interface DSAKCalculator
        Parameters:
        n - the order of the DSA group.
        d - the DSA private value.
        message - the message being signed.

      • nextK

        public java.math.BigInteger nextK()
        Description copied from interface: DSAKCalculator
        Return the next valid value of K.
        Specified by:
        nextK in interface DSAKCalculator
        Returns:
        a K value.