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1 files changed, 316 insertions, 0 deletions

diff --git a/libjava/classpath/java/security/SignatureSpi.java b/libjava/classpath/java/security/SignatureSpi.java
new file mode 100644
index 000000000..1ed078c0b
--- /dev/null
+++ b/libjava/classpath/java/security/SignatureSpi.java
@@ -0,0 +1,316 @@
+/* SignatureSpi.java --- Signature Service Provider Interface
+   Copyright (C) 1999, 2003, 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 java.security;
+
+import java.nio.ByteBuffer;
+import java.security.spec.AlgorithmParameterSpec;
+
+/**
+ * <code>SignatureSpi</code> defines the Service Provider Interface (SPI) for
+ * the {@link Signature} class. The signature class provides an interface to a
+ * digital signature algorithm. Digital signatures are used for authentication
+ * and integrity of data.
+ *
+ * @author Mark Benvenuto (ivymccough@worldnet.att.net)
+ * @since 1.2
+ * @see Signature
+ */
+public abstract class SignatureSpi
+{
+  /** Source of randomness. */
+  protected SecureRandom appRandom;
+
+  /**
+   * Creates a new instance of <code>SignatureSpi</code>.
+   */
+  public SignatureSpi()
+  {
+    appRandom = null;
+  }
+
+  /**
+   * Initializes this instance with the public key for verification purposes.
+   *
+   * @param publicKey
+   *          the public key to verify with.
+   * @throws InvalidKeyException
+   *           if the key is invalid.
+   */
+  protected abstract void engineInitVerify(PublicKey publicKey)
+    throws InvalidKeyException;
+
+  /**
+   * Initializes this instance with the private key for signing purposes.
+   *
+   * @param privateKey
+   *          the private key to sign with.
+   * @throws InvalidKeyException
+   *           if the key is invalid.
+   */
+  protected abstract void engineInitSign(PrivateKey privateKey)
+    throws InvalidKeyException;
+
+  /**
+   * Initializes this instance with the private key and source of randomness for
+   * signing purposes.
+   *
+   * <p>This method cannot be abstract for backward compatibility reasons.</p>
+   *
+   * @param privateKey
+   *          the private key to sign with.
+   * @param random
+   *          the {@link SecureRandom} to use.
+   * @throws InvalidKeyException
+   *           if the key is invalid.
+   * @since 1.2
+   */
+  protected void engineInitSign(PrivateKey privateKey, SecureRandom random)
+    throws InvalidKeyException
+  {
+    appRandom = random;
+    engineInitSign(privateKey);
+  }
+
+  /**
+   * Updates the data to be signed or verified with the specified byte.
+   *
+   * @param b
+   *          byte to update with.
+   * @throws SignatureException
+   *           if the engine is not properly initialized.
+   */
+  protected abstract void engineUpdate(byte b) throws SignatureException;
+
+  /**
+   * Updates the data to be signed or verified with the specified bytes.
+   *
+   * @param b
+   *          the array of bytes to use.
+   * @param off
+   *          the offset to start at in the array.
+   * @param len
+   *          the number of the bytes to use from the array.
+   * @throws SignatureException
+   *           if the engine is not properly initialized.
+   */
+  protected abstract void engineUpdate(byte[] b, int off, int len)
+    throws SignatureException;
+
+  /**
+   * Update this signature with the {@link java.nio.Buffer#remaining()}
+   * bytes of the given buffer.
+   *
+   * @param input The input buffer.
+   * @throws IllegalStateException if the engine is not properly initialized.
+   */
+  protected void engineUpdate(ByteBuffer input)
+  {
+    byte[] buf = new byte[4096];
+    while (input.hasRemaining())
+      {
+        int l = Math.min(input.remaining(), buf.length);
+        input.get(buf, 0, l);
+        try
+          {
+            engineUpdate(buf, 0, l);
+          }
+        catch (SignatureException se)
+          {
+            throw new IllegalStateException(se);
+          }
+      }
+  }
+
+  /**
+   * Returns the signature bytes of all the data fed to this instance. The
+   * format of the output depends on the underlying signature algorithm.
+   *
+   * @return the signature bytes.
+   * @throws SignatureException
+   *           if the engine is not properly initialized.
+   */
+  protected abstract byte[] engineSign() throws SignatureException;
+
+  /**
+   * Generates signature bytes of all the data fed to this instance and stores
+   * the result in the designated array. The format of the output depends on
+   * the underlying signature algorithm.
+   *
+   * <p>This method cannot be abstract for backward compatibility reasons.
+   * After calling this method, the signature is reset to its initial state and
+   * can be used to generate additional signatures.</p>
+   *
+   * <p><b>IMPLEMENTATION NOTE:</b>: Neither this method nor the GNU provider
+   * will return partial digests. If <code>len</code> is less than the
+   * signature length, this method will throw a {@link SignatureException}. If
+   * it is greater than or equal then it is ignored.</p>
+   *
+   * @param outbuf
+   *          the array of bytes to store the result in.
+   * @param offset
+   *          the offset to start at in the array.
+   * @param len
+   *          the number of the bytes to use in the array.
+   * @return the real number of bytes used.
+   * @throws SignatureException
+   *           if the engine is not properly initialized.
+   * @since 1.2
+   */
+  protected int engineSign(byte[] outbuf, int offset, int len)
+    throws SignatureException
+  {
+    byte[] tmp = engineSign();
+    if (tmp.length > len)
+      throw new SignatureException("Invalid Length");
+
+    System.arraycopy(outbuf, offset, tmp, 0, tmp.length);
+    return tmp.length;
+  }
+
+  /**
+   * Verifies a designated signature.
+   *
+   * @param sigBytes
+   *          the signature bytes to verify.
+   * @return <code>true</code> if verified, <code>false</code> otherwise.
+   * @throws SignatureException
+   *           if the engine is not properly initialized or if it is the wrong
+   *           signature.
+   */
+  protected abstract boolean engineVerify(byte[] sigBytes)
+    throws SignatureException;
+
+  /**
+   * Convenience method which calls the method with the same name and one
+   * argument after copying the designated bytes into a temporary byte array.
+   * Subclasses may override this method for performance reasons.
+   *
+   * @param sigBytes
+   *          the array of bytes to use.
+   * @param offset
+   *          the offset to start from in the array of bytes.
+   * @param length
+   *          the number of bytes to use, starting at offset.
+   * @return <code>true</code> if verified, <code>false</code> otherwise.
+   * @throws SignatureException
+   *           if the engine is not properly initialized.
+   */
+  protected boolean engineVerify(byte[] sigBytes, int offset, int length)
+    throws SignatureException
+  {
+    byte[] tmp = new byte[length];
+    System.arraycopy(sigBytes, offset, tmp, 0, length);
+    return engineVerify(tmp);
+  }
+
+  /**
+   * Sets the specified algorithm parameter to the specified value.
+   *
+   * @param param
+   *          the parameter name.
+   * @param value
+   *          the parameter value.
+   * @throws InvalidParameterException
+   *           if the parameter invalid, the parameter is already set and
+   *           cannot be changed, a security exception occured, etc.
+   * @deprecated use the other setParameter.
+   */
+  protected abstract void engineSetParameter(String param, Object value)
+    throws InvalidParameterException;
+
+  /**
+   * Sets the signature engine with the specified {@link AlgorithmParameterSpec}.
+   *
+   * <p>This method cannot be abstract for backward compatibility reasons. By
+   * default it always throws {@link UnsupportedOperationException} unless
+   * overridden.</p>
+   *
+   * @param params
+   *          the parameters.
+   * @throws InvalidParameterException
+   *           if the parameter is invalid, the parameter is already set and
+   *           cannot be changed, a security exception occured, etc.
+   */
+  protected void engineSetParameter(AlgorithmParameterSpec params)
+    throws InvalidAlgorithmParameterException
+  {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * The default implementaion of this method always throws a
+   * {@link UnsupportedOperationException}. It MUST be overridden by concrete
+   * implementations to return the appropriate {@link AlgorithmParameters} for
+   * this signature engine (or <code>null</code> when that engine does not use
+   * any parameters.
+   *
+   * @return the parameters used with this signature engine, or
+   *         <code>null</code> if it does not use any parameters.
+   * @throws UnsupportedOperationException
+   *           always.
+   */
+  protected AlgorithmParameters engineGetParameters()
+  {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * Returns the value for the specified algorithm parameter.
+   *
+   * @param param
+   *          the parameter name.
+   * @return the parameter value.
+   * @throws InvalidParameterException
+   *           if the parameter is invalid.
+   * @deprecated use the other getParameter
+   */
+  protected abstract Object engineGetParameter(String param)
+    throws InvalidParameterException;
+
+  /**
+   * Returns a clone of this instance.
+   *
+   * @return a clone of this instance.
+   * @throws CloneNotSupportedException
+   *           if the implementation does not support cloning.
+   */
+  public Object clone() throws CloneNotSupportedException
+  {
+    return super.clone();
+  }
+}