Package org.bouncycastle.jcajce.provider.asymmetric.dh

Class KeyAgreementSpi

java.lang.Object

javax.crypto.KeyAgreementSpi

org.bouncycastle.jcajce.provider.asymmetric.util.BaseAgreementSpi

org.bouncycastle.jcajce.provider.asymmetric.dh.KeyAgreementSpi

Direct Known Subclasses:

KeyAgreementSpi.DHUwithSHA1CKDF, KeyAgreementSpi.DHUwithSHA1KDF, KeyAgreementSpi.DHUwithSHA224CKDF, KeyAgreementSpi.DHUwithSHA224KDF, KeyAgreementSpi.DHUwithSHA256CKDF, KeyAgreementSpi.DHUwithSHA256KDF, KeyAgreementSpi.DHUwithSHA384CKDF, KeyAgreementSpi.DHUwithSHA384KDF, KeyAgreementSpi.DHUwithSHA512CKDF, KeyAgreementSpi.DHUwithSHA512KDF, KeyAgreementSpi.DHwithRFC2631KDF, KeyAgreementSpi.DHwithSHA1CKDF, KeyAgreementSpi.DHwithSHA1KDF, KeyAgreementSpi.DHwithSHA224CKDF, KeyAgreementSpi.DHwithSHA224KDF, KeyAgreementSpi.DHwithSHA256CKDF, KeyAgreementSpi.DHwithSHA256KDF, KeyAgreementSpi.DHwithSHA384CKDF, KeyAgreementSpi.DHwithSHA384KDF, KeyAgreementSpi.DHwithSHA512CKDF, KeyAgreementSpi.DHwithSHA512KDF, KeyAgreementSpi.MQVwithSHA1CKDF, KeyAgreementSpi.MQVwithSHA1KDF, KeyAgreementSpi.MQVwithSHA224CKDF, KeyAgreementSpi.MQVwithSHA224KDF, KeyAgreementSpi.MQVwithSHA256CKDF, KeyAgreementSpi.MQVwithSHA256KDF, KeyAgreementSpi.MQVwithSHA384CKDF, KeyAgreementSpi.MQVwithSHA384KDF, KeyAgreementSpi.MQVwithSHA512CKDF, KeyAgreementSpi.MQVwithSHA512KDF

public class KeyAgreementSpi
extends BaseAgreementSpi

Diffie-Hellman key agreement. There's actually a better way of doing this if you are using long term public keys, see the light-weight version for details.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	KeyAgreementSpi.DHUwithSHA1CKDF
static class	KeyAgreementSpi.DHUwithSHA1KDF
static class	KeyAgreementSpi.DHUwithSHA224CKDF
static class	KeyAgreementSpi.DHUwithSHA224KDF
static class	KeyAgreementSpi.DHUwithSHA256CKDF
static class	KeyAgreementSpi.DHUwithSHA256KDF
static class	KeyAgreementSpi.DHUwithSHA384CKDF
static class	KeyAgreementSpi.DHUwithSHA384KDF
static class	KeyAgreementSpi.DHUwithSHA512CKDF
static class	KeyAgreementSpi.DHUwithSHA512KDF
static class	KeyAgreementSpi.DHwithRFC2631KDF
static class	KeyAgreementSpi.DHwithSHA1CKDF
static class	KeyAgreementSpi.DHwithSHA1KDF
static class	KeyAgreementSpi.DHwithSHA224CKDF
static class	KeyAgreementSpi.DHwithSHA224KDF
static class	KeyAgreementSpi.DHwithSHA256CKDF
static class	KeyAgreementSpi.DHwithSHA256KDF
static class	KeyAgreementSpi.DHwithSHA384CKDF
static class	KeyAgreementSpi.DHwithSHA384KDF
static class	KeyAgreementSpi.DHwithSHA512CKDF
static class	KeyAgreementSpi.DHwithSHA512KDF
static class	KeyAgreementSpi.MQVwithSHA1CKDF
static class	KeyAgreementSpi.MQVwithSHA1KDF
static class	KeyAgreementSpi.MQVwithSHA224CKDF
static class	KeyAgreementSpi.MQVwithSHA224KDF
static class	KeyAgreementSpi.MQVwithSHA256CKDF
static class	KeyAgreementSpi.MQVwithSHA256KDF
static class	KeyAgreementSpi.MQVwithSHA384CKDF
static class	KeyAgreementSpi.MQVwithSHA384KDF
static class	KeyAgreementSpi.MQVwithSHA512CKDF
static class	KeyAgreementSpi.MQVwithSHA512KDF

Field Summary

Fields inherited from class org.bouncycastle.jcajce.provider.asymmetric.util.BaseAgreementSpi

kaAlgorithm, kdf, ukmParameters, ukmParametersSalt

Constructor Summary

Constructors

Constructor	Description
KeyAgreementSpi()
KeyAgreementSpi(String kaAlgorithm, DHUnifiedAgreement unifiedAgreement, DerivationFunction kdf)
KeyAgreementSpi(String kaAlgorithm, BasicAgreement mqvAgreement, DerivationFunction kdf)
KeyAgreementSpi(String kaAlgorithm, DerivationFunction kdf)

Method Summary

Modifier and Type	Method	Description
protected byte[]	bigIntToBytes(BigInteger r)
protected byte[]	doCalcSecret()
protected void	doInitFromKey(Key key, AlgorithmParameterSpec params, SecureRandom random)
protected Key	engineDoPhase(Key key, boolean lastPhase)
protected byte[]	engineGenerateSecret()
protected int	engineGenerateSecret(byte[] sharedSecret, int offset)
protected SecretKey	engineGenerateSecret(String algorithm)
protected void	engineInit(Key key, SecureRandom random)

Methods inherited from class org.bouncycastle.jcajce.provider.asymmetric.util.BaseAgreementSpi

engineInit, getAlgorithm, getKeySize, trimZeroes

Methods inherited from class java.lang.Object

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

Constructor Details

KeyAgreementSpi

public KeyAgreementSpi()

KeyAgreementSpi

public KeyAgreementSpi(String kaAlgorithm,
 DerivationFunction kdf)

KeyAgreementSpi

public KeyAgreementSpi(String kaAlgorithm,
 DHUnifiedAgreement unifiedAgreement,
 DerivationFunction kdf)

KeyAgreementSpi

public KeyAgreementSpi(String kaAlgorithm,
 BasicAgreement mqvAgreement,
 DerivationFunction kdf)

Method Details

bigIntToBytes

protected byte[] bigIntToBytes(BigInteger r)

engineDoPhase

protected Key engineDoPhase(Key key,
 boolean lastPhase)
                     throws InvalidKeyException,
IllegalStateException

Specified by:

engineDoPhase in class KeyAgreementSpi

Throws:

InvalidKeyException

IllegalStateException

engineGenerateSecret

protected byte[] engineGenerateSecret()
                               throws IllegalStateException

Overrides:

engineGenerateSecret in class BaseAgreementSpi

Throws:

IllegalStateException

engineGenerateSecret

protected int engineGenerateSecret(byte[] sharedSecret,
 int offset)
                            throws IllegalStateException,
ShortBufferException

Overrides:

engineGenerateSecret in class BaseAgreementSpi

Throws:

IllegalStateException

ShortBufferException

engineGenerateSecret

protected SecretKey engineGenerateSecret(String algorithm)
                                  throws NoSuchAlgorithmException

Overrides:

engineGenerateSecret in class BaseAgreementSpi

Throws:

NoSuchAlgorithmException

doInitFromKey

protected void doInitFromKey(Key key,
 AlgorithmParameterSpec params,
 SecureRandom random)
                      throws InvalidKeyException,
InvalidAlgorithmParameterException

Specified by:

doInitFromKey in class BaseAgreementSpi

Throws:

InvalidKeyException

InvalidAlgorithmParameterException

engineInit

protected void engineInit(Key key,
 SecureRandom random)
                   throws InvalidKeyException

Overrides:

engineInit in class BaseAgreementSpi

Throws:

InvalidKeyException

doCalcSecret

protected byte[] doCalcSecret()

Specified by:

doCalcSecret in class BaseAgreementSpi