Package org.bouncycastle.crypto.fips

Class FipsDSA.DomainParametersValidator

java.lang.Object

org.bouncycastle.crypto.fips.FipsDSA.DomainParametersValidator

Enclosing class:

FipsDSA

public static final class FipsDSA.DomainParametersValidator
extends Object

Domain parameter validator for DSA.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	FipsDSA.DomainParametersValidator.Version

Constructor Summary

Constructors

Constructor	Description
DomainParametersValidator(FipsDigestAlgorithm digestAlgorithm, SecureRandom random)	Base constructor - for 186-4
DomainParametersValidator(FipsDSA.DomainParametersValidator.Version version, FipsDigestAlgorithm digestAlgorithm, SecureRandom random)	Base constructor.

Method Summary

Modifier and Type	Method	Description
boolean	isPartiallyValidG(BigInteger p, BigInteger q, BigInteger g)	Do a partial validation of g against p and q.
boolean	isValidG(BigInteger p, BigInteger q, byte[] seed, int index, BigInteger g)	Do a full validation of g against p and q by including the seed and index associated with g's related parameters.
boolean	isValidPAndQ(BigInteger p, BigInteger q, byte[] seed, int counter)	Validate P and Q against the passed in seed and counter.

Methods inherited from class java.lang.Object

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

Constructor Details

DomainParametersValidator

public DomainParametersValidator(FipsDigestAlgorithm digestAlgorithm,
 SecureRandom random)

Base constructor - for 186-4

Parameters:

digestAlgorithm - digest to use in prime calculations.

random - source of randomness for prime number testing.

DomainParametersValidator

public DomainParametersValidator(FipsDSA.DomainParametersValidator.Version version,
 FipsDigestAlgorithm digestAlgorithm,
 SecureRandom random)

Base constructor.

Parameters:

version - the version of DSS the validator is for.

digestAlgorithm - digest to use in prime calculations.

random - source of randomness for prime number testing.

Method Details

isValidPAndQ

public boolean isValidPAndQ(BigInteger p,
 BigInteger q,
 byte[] seed,
 int counter)

Validate P and Q against the passed in seed and counter.

Parameters:

p - the prime P.

q - the prime Q.

seed - the seed P and Q were derived from.

counter - the number of iterations required to derive P.

Returns:

true if the P and Q values are the expected ones, false otherwise.

isPartiallyValidG

public boolean isPartiallyValidG(BigInteger p,
 BigInteger q,
 BigInteger g)

Do a partial validation of g against p and q.

Parameters:

p - the prime P.

q - the prime Q.

g - the generator G associated with P and Q.

Returns:

true if the generator is partially valid, false otherwise.

isValidG

public boolean isValidG(BigInteger p,
 BigInteger q,
 byte[] seed,
 int index,
 BigInteger g)

Do a full validation of g against p and q by including the seed and index associated with g's related parameters.

Parameters:

p - the prime P.

q - the prime Q.

seed - the domain parameter seed used to generate p and q.

index - the 8 bit usage index for G.

g - the generator G associated with P and Q.

Returns:

true if the generator is partially valid, false otherwise.