Bouncy Castle Cryptography Library 1.80 · org.bouncycastle.crypto.prng.drbg.DualECSP800DRBG

Field Summary

Modifier and Type	Field and Description
private ECCurve.Fp	_curve
private Digest	_digest
private EntropySource	_entropySource
private ECMultiplier	_fixedPointMultiplier
private int	_outlen
private ECPoint	_P
private ECPoint	_Q
private long	_reseedCounter
private byte[]	_s
private int	_securityStrength
private int	_seedlen
private int	_sLength
private static final int	MAX_ADDITIONAL_INPUT
private static final int	MAX_ENTROPY_LENGTH
private static final int	MAX_PERSONALIZATION_STRING
private static final DualECPoints[]	nistPoints
private static final BigInteger	p256_Px
private static final BigInteger	p256_Py
private static final BigInteger	p256_Qx
private static final BigInteger	p256_Qy
private static final BigInteger	p384_Px
private static final BigInteger	p384_Py
private static final BigInteger	p384_Qx
private static final BigInteger	p384_Qy
private static final BigInteger	p521_Px
private static final BigInteger	p521_Py
private static final BigInteger	p521_Qx
private static final BigInteger	p521_Qy
private static final long	RESEED_MAX

Constructor Summary

Access	Constructor and Description
public	DualECSP800DRBG(Digest source digest to use with the DRB stream. digest, int security strength required (in bits) securityStrength, EntropySource source of entropy to use for seeding/reseeding. entropySource, byte[] personalization string to distinguish this DRBG (may be null). personalizationString, byte[] nonce to further distinguish this DRBG (may be null). nonce) Construct a SP800-90A Dual EC DRBG.
public	DualECSP800DRBG(DualECPoints[] an array of points to choose from, in order of increasing security strength pointSet, Digest source digest to use with the DRB stream. digest, int security strength required (in bits) securityStrength, EntropySource source of entropy to use for seeding/reseeding. entropySource, byte[] personalization string to distinguish this DRBG (may be null). personalizationString, byte[] nonce to further distinguish this DRBG (may be null). nonce) Construct a SP800-90A Dual EC DRBG.

Access

Constructor and Description

public

DualECSP800DRBG(Digest

source digest to use with the DRB stream.

digest, int

security strength required (in bits)

securityStrength, EntropySource

source of entropy to use for seeding/reseeding.

entropySource, byte[]

personalization string to distinguish this DRBG (may be null).

personalizationString, byte[]

nonce to further distinguish this DRBG (may be null).

nonce)

Construct a SP800-90A Dual EC DRBG.

public

DualECSP800DRBG(DualECPoints[]

an array of points to choose from, in order of increasing security strength

pointSet, Digest

source digest to use with the DRB stream.

digest, int

security strength required (in bits)

securityStrength, EntropySource

source of entropy to use for seeding/reseeding.

entropySource, byte[]

personalization string to distinguish this DRBG (may be null).

personalizationString, byte[]

nonce to further distinguish this DRBG (may be null).

nonce)

Construct a SP800-90A Dual EC DRBG.

Method Summary

Modifier and Type	Method and Description
public int	Returns: number of bits generated, -1 if a reseed required. generate(byte[] output array for generated bits. output, byte[] additional input to be added to the DRBG in this step. additionalInput, boolean true if a reseed should be forced, false otherwise. predictionResistant) Implements org.bouncycastle.crypto.prng.drbg.SP80090DRBG.generate. Populate a passed in array with random data.
public int	Returns: the number of bits produced on each internal round of the DRBG. getBlockSize() Implements org.bouncycastle.crypto.prng.drbg.SP80090DRBG.getBlockSize. Return the block size (in bits) of the DRBG.
private byte[]	getEntropy()
private BigInteger	getScalarMultipleXCoord(ECPoint p, BigInteger s)
private byte[]	pad8(byte[] s, int seedlen)
public void	reseed(byte[] additional input to be added to the DRBG in this step. additionalInput) Implements org.bouncycastle.crypto.prng.drbg.SP80090DRBG.reseed. Reseed the DRBG.
private byte[]	xor(byte[] a, byte[] b)

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

Field Detail

_curve	back to summary
private ECCurve.Fp _curve

_digest	back to summary
private Digest _digest

_entropySource	back to summary
private EntropySource _entropySource

_fixedPointMultiplier	back to summary
private ECMultiplier _fixedPointMultiplier

_outlen	back to summary
private int _outlen

_P	back to summary
private ECPoint _P

_Q	back to summary
private ECPoint _Q

_reseedCounter	back to summary
private long _reseedCounter

_s	back to summary
private byte[] _s

_securityStrength	back to summary
private int _securityStrength

_seedlen	back to summary
private int _seedlen

_sLength	back to summary
private int _sLength

MAX_ADDITIONAL_INPUT	back to summary
private static final int MAX_ADDITIONAL_INPUT

MAX_ENTROPY_LENGTH	back to summary
private static final int MAX_ENTROPY_LENGTH

MAX_PERSONALIZATION_STRING	back to summary
private static final int MAX_PERSONALIZATION_STRING

nistPoints	back to summary
private static final DualECPoints[] nistPoints

p256_Px	back to summary
private static final BigInteger p256_Px

p256_Py	back to summary
private static final BigInteger p256_Py

p256_Qx	back to summary
private static final BigInteger p256_Qx

p256_Qy	back to summary
private static final BigInteger p256_Qy

p384_Px	back to summary
private static final BigInteger p384_Px

p384_Py	back to summary
private static final BigInteger p384_Py

p384_Qx	back to summary
private static final BigInteger p384_Qx

p384_Qy	back to summary
private static final BigInteger p384_Qy

p521_Px	back to summary
private static final BigInteger p521_Px

p521_Py	back to summary
private static final BigInteger p521_Py

p521_Qx	back to summary
private static final BigInteger p521_Qx

p521_Qy	back to summary
private static final BigInteger p521_Qy

RESEED_MAX	back to summary
private static final long RESEED_MAX

Constructor Detail

DualECSP800DRBG	back to summary
public DualECSP800DRBG(Digest digest, int securityStrength, EntropySource entropySource, byte[] personalizationString, byte[] nonce) Construct a SP800-90A Dual EC DRBG. Minimum entropy requirement is the security strength requested. Parameters digest:Digest source digest to use with the DRB stream. securityStrength:int security strength required (in bits) entropySource:EntropySource source of entropy to use for seeding/reseeding. personalizationString:byte[] personalization string to distinguish this DRBG (may be null). nonce:byte[] nonce to further distinguish this DRBG (may be null).

DualECSP800DRBG

back to summary

public DualECSP800DRBG(Digest digest, int securityStrength, EntropySource entropySource, byte[] personalizationString, byte[] nonce)

Construct a SP800-90A Dual EC DRBG.

Minimum entropy requirement is the security strength requested.

Parameters

digest:Digest: source digest to use with the DRB stream.
securityStrength:int: security strength required (in bits)
entropySource:EntropySource: source of entropy to use for seeding/reseeding.
personalizationString:byte[]: personalization string to distinguish this DRBG (may be null).
nonce:byte[]: nonce to further distinguish this DRBG (may be null).

DualECSP800DRBG	back to summary
public DualECSP800DRBG(DualECPoints[] pointSet, Digest digest, int securityStrength, EntropySource entropySource, byte[] personalizationString, byte[] nonce) Construct a SP800-90A Dual EC DRBG. Minimum entropy requirement is the security strength requested. Parameters pointSet:DualECPoints[] an array of points to choose from, in order of increasing security strength digest:Digest source digest to use with the DRB stream. securityStrength:int security strength required (in bits) entropySource:EntropySource source of entropy to use for seeding/reseeding. personalizationString:byte[] personalization string to distinguish this DRBG (may be null). nonce:byte[] nonce to further distinguish this DRBG (may be null).

DualECSP800DRBG

back to summary

public DualECSP800DRBG(DualECPoints[] pointSet, Digest digest, int securityStrength, EntropySource entropySource, byte[] personalizationString, byte[] nonce)

Construct a SP800-90A Dual EC DRBG.

Minimum entropy requirement is the security strength requested.

Parameters

pointSet:DualECPoints[]: an array of points to choose from, in order of increasing security strength
digest:Digest: source digest to use with the DRB stream.
securityStrength:int: security strength required (in bits)
entropySource:EntropySource: source of entropy to use for seeding/reseeding.
personalizationString:byte[]: personalization string to distinguish this DRBG (may be null).
nonce:byte[]: nonce to further distinguish this DRBG (may be null).

Method Detail

generate	back to summary
public int generate(byte[] output, byte[] additionalInput, boolean predictionResistant) Implements org.bouncycastle.crypto.prng.drbg.SP80090DRBG.generate. Populate a passed in array with random data. Parameters output:byte[] output array for generated bits. additionalInput:byte[] additional input to be added to the DRBG in this step. predictionResistant:boolean true if a reseed should be forced, false otherwise. Returns:int number of bits generated, -1 if a reseed required.

generate

back to summary

public int generate(byte[] output, byte[] additionalInput, boolean predictionResistant)

Implements org.bouncycastle.crypto.prng.drbg.SP80090DRBG.generate.

Populate a passed in array with random data.

Parameters

output:byte[]: output array for generated bits.
additionalInput:byte[]: additional input to be added to the DRBG in this step.
predictionResistant:boolean: true if a reseed should be forced, false otherwise.

Returns:int

number of bits generated, -1 if a reseed required.

getBlockSize	back to summary
public int getBlockSize() Implements org.bouncycastle.crypto.prng.drbg.SP80090DRBG.getBlockSize. Return the block size (in bits) of the DRBG. Returns:int the number of bits produced on each internal round of the DRBG.

getBlockSize

back to summary

public int getBlockSize()

Implements org.bouncycastle.crypto.prng.drbg.SP80090DRBG.getBlockSize.

Return the block size (in bits) of the DRBG.

Returns:int: the number of bits produced on each internal round of the DRBG.

getEntropy	back to summary
private byte[] getEntropy()

getScalarMultipleXCoord	back to summary
private BigInteger getScalarMultipleXCoord(ECPoint p, BigInteger s)

pad8	back to summary
private byte[] pad8(byte[] s, int seedlen)

reseed	back to summary
public void reseed(byte[] additionalInput) Implements org.bouncycastle.crypto.prng.drbg.SP80090DRBG.reseed. Reseed the DRBG. Parameters additionalInput:byte[] additional input to be added to the DRBG in this step.

reseed

back to summary

public void reseed(byte[] additionalInput)

Implements org.bouncycastle.crypto.prng.drbg.SP80090DRBG.reseed.

Reseed the DRBG.

Parameters

additionalInput:byte[]: additional input to be added to the DRBG in this step.

xor	back to summary
private byte[] xor(byte[] a, byte[] b)

public Class DualECSP800DRBG

Field Summary

Constructor Summary

Method Summary

Field Detail

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Method Detail