HMacDSAKCalculator (Bouncy Castle Library 1.52 API Specification)

org.bouncycastle.crypto.signers

## Class HMacDSAKCalculator

- java.lang.Object
- - org.bouncycastle.crypto.signers.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.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `HMacDSAKCalculator(Digest digest)` Base constructor.

  - ### Method Summary

    Methods
    Modifier and Type | Method and 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.