Top Description Fields Constructors Methods
org.bouncycastle.crypto.general

pack-priv Class HMacDsaKCalculator

extends Object
implements DsaKCalculator
Class Inheritance
All Implemented Interfaces
org.bouncycastle.crypto.general.DsaKCalculator
Imports
java.math.BigInteger, java.security.SecureRandom, org.bouncycastle.crypto.internal.Digest, org.bouncycastle.crypto.internal.macs.HMac, org.bouncycastle.crypto.internal.params.KeyParameterImpl, org.bouncycastle.util.Arrays, .BigIntegers
A deterministic K calculator based on the algorithm in section 3.2 of RFC 6979.

Field Summary

Modifier and TypeField and Description
private final HMac
hMac

private final byte[]
K

private BigInteger
n

private final byte[]
V

private static final BigInteger
ZERO

Constructor Summary

AccessConstructor and Description
public
HMacDsaKCalculator(Digest
digest to build the HMAC on.
digest)

Base constructor.

Method Summary

Modifier and TypeMethod and Description
private BigInteger
bitsToInt(byte[] t)

public void
init(BigInteger
the order of the DSA group.
n, SecureRandom
a source of randomness.
random)

Implements org.bouncycastle.crypto.general.DsaKCalculator.init.

Non-deterministic initialiser.
public void
init(BigInteger
the order of the DSA group.
n, BigInteger
the DSA private value.
d, byte[]
the message being signed.
message)

Implements org.bouncycastle.crypto.general.DsaKCalculator.init.

Deterministic initialiser.
public boolean
isDeterministic()

Implements org.bouncycastle.crypto.general.DsaKCalculator.isDeterministic.

Return true if this calculator is deterministic, false otherwise.
public BigInteger
nextK()

Implements org.bouncycastle.crypto.general.DsaKCalculator.nextK.

Return the next valid value of K.
Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

hMacback to summary
private final HMac hMac
Kback to summary
private final byte[] K
nback to summary
private BigInteger n
Vback to summary
private final byte[] V
ZEROback to summary
private static final BigInteger ZERO

Constructor Detail

HMacDsaKCalculatorback to summary
public HMacDsaKCalculator(Digest digest)

Base constructor.

Parameters
digest:Digest

digest to build the HMAC on.

Method Detail

bitsToIntback to summary
private BigInteger bitsToInt(byte[] t)
initback to summary
public void init(BigInteger n, SecureRandom random)

Implements org.bouncycastle.crypto.general.DsaKCalculator.init.

Doc from org.bouncycastle.crypto.general.DsaKCalculator.init.

Non-deterministic initialiser.

Parameters
n:BigInteger

the order of the DSA group.

random:SecureRandom

a source of randomness.

initback to summary
public void init(BigInteger n, BigInteger d, byte[] message)

Implements org.bouncycastle.crypto.general.DsaKCalculator.init.

Doc from org.bouncycastle.crypto.general.DsaKCalculator.init.

Deterministic initialiser.

Parameters
n:BigInteger

the order of the DSA group.

d:BigInteger

the DSA private value.

message:byte[]

the message being signed.

isDeterministicback to summary
public boolean isDeterministic()

Implements org.bouncycastle.crypto.general.DsaKCalculator.isDeterministic.

Doc from org.bouncycastle.crypto.general.DsaKCalculator.isDeterministic.

Return true if this calculator is deterministic, false otherwise.

Returns:boolean

true if deterministic, otherwise false.

nextKback to summary
public BigInteger nextK()

Implements org.bouncycastle.crypto.general.DsaKCalculator.nextK.

Doc from org.bouncycastle.crypto.general.DsaKCalculator.nextK.

Return the next valid value of K.

Returns:BigInteger

a K value.