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1 files changed, 160 insertions, 0 deletions

diff --git a/libjava/classpath/javax/crypto/KeyAgreementSpi.java b/libjava/classpath/javax/crypto/KeyAgreementSpi.java
new file mode 100644
index 000000000..d71c89c13
--- /dev/null
+++ b/libjava/classpath/javax/crypto/KeyAgreementSpi.java
@@ -0,0 +1,160 @@
+/* KeyAgreementSpi.java -- The key agreement service provider interface.
+   Copyright (C) 2004  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.crypto;
+
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidKeyException;
+import java.security.Key;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+import java.security.spec.AlgorithmParameterSpec;
+
+/**
+ * This is the <i>Service Provider Interface</i> (<b>SPI</b>) for the
+ * {@link javax.crypto.KeyAgreement} class.
+ *
+ * <p>Providers wishing to implement a key agreement algorithm must
+ * subclass this and provide an appropriate implementation for all the
+ * abstract methods below, and provide an appropriate entry in the
+ * master {@link java.security.Provider} class (the service name for key
+ * agreement algorithms is <code>"KeyAgreement"</code>).
+ *
+ * @author Casey Marshall (csm@gnu.org)
+ * @since 1.4
+ * @see KeyAgreement
+ * @see SecretKey
+ */
+public abstract class KeyAgreementSpi
+{
+
+  // Constructor.
+  // ------------------------------------------------------------------------
+
+  /**
+   * Create a new KeyAgreementSpi instance.
+   */
+  public KeyAgreementSpi()
+  {
+  }
+
+  // Abstract instance methods.
+  // ------------------------------------------------------------------------
+
+  /**
+   * Do a phase in the key agreement.
+   *
+   * @param key The key to use for this phase.
+   * @param lastPhase <code>true</code> if this call should be the last
+   *        phase.
+   * @return The intermediate result, or <code>null</code> if there is
+   *         no intermediate result.
+   * @throws java.lang.IllegalStateException If this instance has not
+   *         been initialized.
+   * @throws java.security.InvalidKeyException If the supplied key is
+   *         not appropriate.
+   */
+  protected abstract Key engineDoPhase(Key key, boolean lastPhase)
+    throws IllegalStateException, InvalidKeyException;
+
+  /**
+   * Generate the shared secret in a new byte array.
+   *
+   * @return The shared secret in a new byte array.
+   * @throws java.lang.IllegalStateException If this key agreement is
+   *         not ready to generate the secret.
+   */
+  protected abstract byte[] engineGenerateSecret()
+    throws IllegalStateException;
+
+  /**
+   * Generate the shared secret, storing it into the specified array.
+   *
+   * @param sharedSecret The byte array in which to store the secret.
+   * @param offset       The offset into the byte array to start.
+   * @return The size of the shared secret.
+   * @throws java.lang.IllegalStateException If this key agreement is
+   *         not ready to generate the secret.
+   * @throws javax.crypto.ShortBufferException If there is not enough
+   *         space in the supplied array for the shared secret.
+   */
+  protected abstract int engineGenerateSecret(byte[] sharedSecret, int offset)
+    throws IllegalStateException, ShortBufferException;
+
+  /**
+   * Generate the shared secret and return it as a {@link SecretKey}.
+   *
+   * @param algorithm The algorithm with which to generate the secret key.
+   * @return The shared secret as a secret key.
+   * @throws java.lang.IllegalStateException If this key agreement is
+   *         not ready to generate the secret.
+   * @throws java.security.InvalidKeyException If the shared secret
+   *         cannot be made into a {@link SecretKey}.
+   * @throws java.security.NoSuchAlgorithmException If
+   *         <code>algorithm</code> cannot be found.
+   */
+  protected abstract SecretKey engineGenerateSecret(String algorithm)
+    throws IllegalStateException, InvalidKeyException, NoSuchAlgorithmException;
+
+  /**
+   * Initialize this key agreement with a key, parameters, and source of
+   * randomness.
+   *
+   * @param key    The key to initialize with, usually a private key.
+   * @param params The parameters to initialize with.
+   * @param random The source of randomness to use.
+   * @throws java.security.InvalidAlgorithmParameterException If the
+   *         supplied parameters are inappropriate.
+   * @throws java.security.InvalidKeyException If the supplied key is
+   *         inappropriate.
+   */
+  protected abstract void engineInit(Key key, AlgorithmParameterSpec params,
+                                     SecureRandom random)
+    throws InvalidAlgorithmParameterException, InvalidKeyException;
+
+  /**
+   * Initialize this key agreement with a key and source of randomness.
+   *
+   * @param key    The key to initialize with, usually a private key.
+   * @param random The source of randomness to use.
+   * @throws java.security.InvalidKeyException If the supplied key is
+   *         inappropriate.
+   */
+  protected abstract void engineInit(Key key, SecureRandom random)
+    throws InvalidKeyException;
+}