File	Doc	Category	Size	Date	Package
KeyAgreementSpi.java	API Doc	Android 1.5 API	5669	Wed May 06 22:41:02 BST 2009	javax.crypto

KeyAgreementSpi

• java.lang.Object

Fields Summary

Constructors Summary
public KeyAgreementSpi() Creates a new {@code KeyAgreementSpi} instance. since Android 1.0

Methods Summary
protected abstract java.security.Key	engineDoPhase(java.security.Key key, boolean lastPhase) Does the next (or the last) phase of the key agreement, using the specified key. param key the key received from the other party for this phase. param lastPhase set to {@code true} if this is the last phase of this key agreement. return 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, throws IllegalStateException if this instance has not been initialized. since Android 1.0
protected abstract byte[]	engineGenerateSecret() Generates the shared secret. return the generated shared secret. throws IllegalStateException if this key agreement is not complete. since Android 1.0
protected abstract int	engineGenerateSecret(byte[] sharedSecret, int offset) Generates the shared secret and stores it into the buffer {@code sharedSecred} at {@code offset}. param sharedSecret the buffer to store the shared secret. param offset the offset in the buffer. return the number of bytes stored in the buffer. throws IllegalStateException if this key agreement is not complete. throws ShortBufferException if the specified buffer is too small for the shared secret. since Android 1.0
protected abstract javax.crypto.SecretKey	engineGenerateSecret(java.lang.String algorithm) Generates the shared secret. param algorithm the algorithm to for the {@code SecretKey} return the shared secret as a {@code SecretKey} of the specified algorithm. throws IllegalStateException if this key agreement is not complete. throws NoSuchAlgorithmException if the specified algorithm for the secret key does not exists. throws InvalidKeyException if a {@code SecretKey} with the specified algorithm cannot be created using the generated shared secret. since Android 1.0
protected abstract void	engineInit(java.security.Key key, java.security.SecureRandom random) Initializes this {@code KeyAgreementSpi} with the specified key and the specified randomness source. param key the key to initialize this key agreement. param random the source for any randomness needed. throws InvalidKeyException if the specified key cannot be used to initialize this key agreement. since Android 1.0
protected abstract void	engineInit(java.security.Key key, java.security.spec.AlgorithmParameterSpec params, java.security.SecureRandom random) Initializes this {@code KeyAgreementSpi} with the specified key, algorithm parameters and randomness source. param key the key to initialize this key agreement. param params the parameters for this key agreement algorithm. param random the source for any randomness needed. throws InvalidKeyException if the specified key cannot be used to initialize this key agreement. throws InvalidAlgorithmParameterException if the specified parameters are invalid for this key agreement algorithm. since Android 1.0