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org.bouncycastle.crypto.fips

pack-priv Class DsaParametersGenerator

Class Inheritance

extends Object

java.lang.Object
org.bouncycastle.crypto.fips.DsaParametersGenerator

Imports

java.math.BigInteger, java.security.SecureRandom, org.bouncycastle.crypto.internal.Digest, org.bouncycastle.crypto.internal.params.DsaParameterGenerationParameters, .DsaParameters, .DsaValidationParameters, org.bouncycastle.math.internal.Primes, org.bouncycastle.util.Arrays, .BigIntegers, org.bouncycastle.util.encoders.Hex

Generate suitable parameters for DSA, in line with FIPS 186-2, or FIPS 186-3.

Field Summary

Modifier and Type	Field and Description
private int	certainty
private Digest	digest
private int	iterations
private int	L
private int	N
private static final BigInteger	ONE
private SecureRandom	random
private static final BigInteger	TWO
private int	usageIndex

Constructor Summary

Access	Constructor and Description
public	DsaParametersGenerator(Digest digest)

Method Summary

Modifier and Type	Method and Description
private static BigInteger	calculateGenerator_FIPS186_2(BigInteger p, BigInteger q, SecureRandom r)
pack-priv static BigInteger	calculateGenerator_FIPS186_3_Unverifiable(BigInteger p, BigInteger q, SecureRandom r)
pack-priv static BigInteger	calculateGenerator_FIPS186_3_Verifiable(Digest d, BigInteger p, BigInteger q, byte[] seed, int index)
public DsaParameters	generateParameters() which generates the p and g values from the given parameters, returning the DSAParameters object.
private DsaParameters	generateParameters_FIPS186_3() generate suitable parameters for DSA, in line with FIPS 186-3 A.1 Generation of the FFC Primes p and q.
private static int	getMinimumIterations(int L)
private static void	hash(Digest d, byte[] input, byte[] output, int outputPos)
private static void	inc(byte[] buf)
public void	init(DsaParameterGenerationParameters DSA 2 key generation parameters. params) Initialise the key generator for DSA 2.
private boolean	isProbablePrime(BigInteger x)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

certainty	back to summary
private int certainty

digest	back to summary
private Digest digest

iterations	back to summary
private int iterations

L	back to summary
private int L

N	back to summary
private int N

ONE	back to summary
private static final BigInteger ONE

random	back to summary
private SecureRandom random

TWO	back to summary
private static final BigInteger TWO

usageIndex	back to summary
private int usageIndex

Constructor Detail

DsaParametersGenerator	back to summary
public DsaParametersGenerator(Digest digest)

Method Detail

calculateGenerator_FIPS186_2	back to summary
private static BigInteger calculateGenerator_FIPS186_2(BigInteger p, BigInteger q, SecureRandom r)

calculateGenerator_FIPS186_3_Unverifiable	back to summary
pack-priv static BigInteger calculateGenerator_FIPS186_3_Unverifiable(BigInteger p, BigInteger q, SecureRandom r)

calculateGenerator_FIPS186_3_Verifiable	back to summary
pack-priv static BigInteger calculateGenerator_FIPS186_3_Verifiable(Digest d, BigInteger p, BigInteger q, byte[] seed, int index)

generateParameters	back to summary
public DsaParameters generateParameters() which generates the p and g values from the given parameters, returning the DSAParameters object. Note can take a while...

generateParameters_FIPS186_3	back to summary
private DsaParameters generateParameters_FIPS186_3() generate suitable parameters for DSA, in line with FIPS 186-3 A.1 Generation of the FFC Primes p and q.

getMinimumIterations	back to summary
private static int getMinimumIterations(int L)

hash	back to summary
private static void hash(Digest d, byte[] input, byte[] output, int outputPos)

inc	back to summary
private static void inc(byte[] buf)

init

back to summary

public void init(DsaParameterGenerationParameters params)

Initialise the key generator for DSA 2.

Use this init method if you need to generate parameters for DSA 2 keys.

Parameters

params:DsaParameterGenerationParameters: DSA 2 key generation parameters.

isProbablePrime	back to summary
private boolean isProbablePrime(BigInteger x)