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

Constructor Summary

Constructors
Constructor	Description
`KeyAgreementSpi()`
`KeyAgreementSpi(java.lang.String kaAlgorithm, DHUnifiedAgreement unifiedAgreement, DerivationFunction kdf)`
`KeyAgreementSpi(java.lang.String kaAlgorithm, BasicAgreement mqvAgreement, DerivationFunction kdf)`
`KeyAgreementSpi(java.lang.String kaAlgorithm, DerivationFunction kdf)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected byte[]`	`bigIntToBytes(java.math.BigInteger r)`
`protected byte[]`	`calcSecret()`
`protected java.security.Key`	`engineDoPhase(java.security.Key key, boolean lastPhase)`
`protected byte[]`	`engineGenerateSecret()`
`protected int`	`engineGenerateSecret(byte[] sharedSecret, int offset)`
`protected javax.crypto.SecretKey`	`engineGenerateSecret(java.lang.String algorithm)`
`protected void`	`engineInit(java.security.Key key, java.security.SecureRandom random)`
`protected void`	`engineInit(java.security.Key key, java.security.spec.AlgorithmParameterSpec params, java.security.SecureRandom random)`

Methods inherited from class org.bouncycastle.jcajce.provider.asymmetric.util.BaseAgreementSpi
getAlgorithm, getKeySize, trimZeroes

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

KeyAgreementSpi
```
public KeyAgreementSpi()
```

KeyAgreementSpi

public KeyAgreementSpi(java.lang.String kaAlgorithm,
                       DerivationFunction kdf)

KeyAgreementSpi

public KeyAgreementSpi(java.lang.String kaAlgorithm,
                       DHUnifiedAgreement unifiedAgreement,
                       DerivationFunction kdf)

KeyAgreementSpi

public KeyAgreementSpi(java.lang.String kaAlgorithm,
                       BasicAgreement mqvAgreement,
                       DerivationFunction kdf)

Method Detail

bigIntToBytes

protected byte[] bigIntToBytes(java.math.BigInteger r)

engineDoPhase

protected java.security.Key engineDoPhase(java.security.Key key,
                                          boolean lastPhase)
                                   throws java.security.InvalidKeyException,
                                          java.lang.IllegalStateException

Specified by:: engineDoPhase in class javax.crypto.KeyAgreementSpi
Throws:: java.security.InvalidKeyException; java.lang.IllegalStateException

engineGenerateSecret
```
protected byte[] engineGenerateSecret()
                               throws java.lang.IllegalStateException
```
Overrides:

engineGenerateSecret in class BaseAgreementSpi

Throws:

java.lang.IllegalStateException

engineGenerateSecret

protected int engineGenerateSecret(byte[] sharedSecret,
                                   int offset)
                            throws java.lang.IllegalStateException,
                                   javax.crypto.ShortBufferException

Overrides:: engineGenerateSecret in class BaseAgreementSpi
Throws:: java.lang.IllegalStateException; javax.crypto.ShortBufferException

engineGenerateSecret

protected javax.crypto.SecretKey engineGenerateSecret(java.lang.String algorithm)
                                               throws java.security.NoSuchAlgorithmException

Overrides:: engineGenerateSecret in class BaseAgreementSpi
Throws:: java.security.NoSuchAlgorithmException

engineInit

protected void engineInit(java.security.Key key,
                          java.security.spec.AlgorithmParameterSpec params,
                          java.security.SecureRandom random)
                   throws java.security.InvalidKeyException,
                          java.security.InvalidAlgorithmParameterException

Specified by:: engineInit in class javax.crypto.KeyAgreementSpi
Throws:: java.security.InvalidKeyException; java.security.InvalidAlgorithmParameterException

engineInit

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

Specified by:: engineInit in class javax.crypto.KeyAgreementSpi
Throws:: java.security.InvalidKeyException

calcSecret
```
protected byte[] calcSecret()
```
Specified by:

calcSecret in class BaseAgreementSpi

Class KeyAgreementSpi

Nested Class Summary

Field Summary

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

Constructor Summary

Method Summary

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

Methods inherited from class java.lang.Object

Constructor Detail

KeyAgreementSpi

KeyAgreementSpi

KeyAgreementSpi

KeyAgreementSpi

Method Detail

bigIntToBytes

engineDoPhase

engineGenerateSecret

engineGenerateSecret

engineGenerateSecret

engineInit

engineInit

calcSecret