org.spongycastle.crypto.signers

Interface DSAKCalculator

All Known Implementing Classes:

HMacDSAKCalculator, RandomDSAKCalculator

public interface DSAKCalculator

Interface define calculators of K values for DSA/ECDSA.

Method Summary

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.

Method Detail

isDeterministic

boolean isDeterministic()

Return true if this calculator is deterministic, false otherwise.

Returns:

true if deterministic, otherwise false.

init

void init(java.math.BigInteger n,
          java.security.SecureRandom random)

Non-deterministic initialiser.

Parameters:

n - the order of the DSA group.

random - a source of randomness.

init

void init(java.math.BigInteger n,
          java.math.BigInteger d,
          byte[] message)

Deterministic initialiser.

Parameters:

n - the order of the DSA group.

d - the DSA private value.

message - the message being signed.

nextK

java.math.BigInteger nextK()

Return the next valid value of K.

Returns:

a K value.