Package org.conscrypt

Class OpenSSLECDHKeyAgreement

java.lang.Object

javax.crypto.KeyAgreementSpi

org.conscrypt.OpenSSLECDHKeyAgreement

public final class OpenSSLECDHKeyAgreement
extends KeyAgreementSpi

Elliptic Curve Diffie-Hellman key agreement backed by the OpenSSL engine.

Constructor Summary

Constructors

Constructor	Description
OpenSSLECDHKeyAgreement()

Method Summary

Modifier and Type	Method	Description
Key	engineDoPhase(Key key, boolean lastPhase)	Does the next (or the last) phase of the key agreement, using the specified key.
protected byte[]	engineGenerateSecret()	Generates the shared secret.
protected int	engineGenerateSecret(byte[] sharedSecret, int offset)	Generates the shared secret and stores it into the buffer sharedSecred at offset.
protected SecretKey	engineGenerateSecret(String algorithm)	Generates the shared secret.
protected void	engineInit(Key key, SecureRandom random)	Initializes this KeyAgreementSpi with the specified key and the specified randomness source.
protected void	engineInit(Key key, AlgorithmParameterSpec params, SecureRandom random)	Initializes this KeyAgreementSpi with the specified key, algorithm parameters and randomness source.

Methods inherited from class java.lang.Object

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

Constructor Detail

OpenSSLECDHKeyAgreement

public OpenSSLECDHKeyAgreement()

Method Detail

engineDoPhase

public Key engineDoPhase(Key key,
                         boolean lastPhase)
                  throws InvalidKeyException

Description copied from class: KeyAgreementSpi

Does the next (or the last) phase of the key agreement, using the specified key.

Specified by:

engineDoPhase in class KeyAgreementSpi

Parameters:

key - the key received from the other party for this phase.

lastPhase - set to true if this is the last phase of this key agreement.

Returns:

the intermediate key from this phase or null if there is no intermediate key for this phase.

Throws:

InvalidKeyException - if the specified key cannot be used in this key agreement or this phase,

engineGenerateSecret

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

Description copied from class: KeyAgreementSpi

Generates the shared secret and stores it into the buffer sharedSecred at offset.

Specified by:

engineGenerateSecret in class KeyAgreementSpi

Parameters:

sharedSecret - the buffer to store the shared secret.

offset - the offset in the buffer.

Returns:

the number of bytes stored in the buffer.

Throws:

ShortBufferException - if the specified buffer is too small for the shared secret.

engineGenerateSecret

protected byte[] engineGenerateSecret()

Description copied from class: KeyAgreementSpi

Generates the shared secret.

Specified by:

engineGenerateSecret in class KeyAgreementSpi

Returns:

the generated shared secret.

engineGenerateSecret

protected SecretKey engineGenerateSecret(String algorithm)

Description copied from class: KeyAgreementSpi

Generates the shared secret.

Specified by:

engineGenerateSecret in class KeyAgreementSpi

Parameters:

algorithm - the algorithm to for the SecretKey

Returns:

the shared secret as a SecretKey of the specified algorithm.

engineInit

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

Description copied from class: KeyAgreementSpi

Initializes this KeyAgreementSpi with the specified key and the specified randomness source.

Specified by:

engineInit in class KeyAgreementSpi

Parameters:

key - the key to initialize this key agreement.

random - the source for any randomness needed.

Throws:

InvalidKeyException - if the specified key cannot be used to initialize this key agreement.

engineInit

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

Description copied from class: KeyAgreementSpi

Initializes this KeyAgreementSpi with the specified key, algorithm parameters and randomness source.

Specified by:

engineInit in class KeyAgreementSpi

Parameters:

key - the key to initialize this key agreement.

params - the parameters for this key agreement algorithm.

random - the source for any randomness needed.

Throws:

InvalidKeyException - if the specified key cannot be used to initialize this key agreement.

InvalidAlgorithmParameterException - if the specified parameters are invalid for this key agreement algorithm.