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1 files changed, 264 insertions, 0 deletions

diff --git a/libjava/classpath/java/security/cert/CertPathValidator.java b/libjava/classpath/java/security/cert/CertPathValidator.java
new file mode 100644
index 000000000..8bd7b58e8
--- /dev/null
+++ b/libjava/classpath/java/security/cert/CertPathValidator.java
@@ -0,0 +1,264 @@
+/* CertPathValidator -- validates certificate paths.
+   Copyright (C) 2003, 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 java.security.cert;
+
+import gnu.java.lang.CPStringBuilder;
+
+import gnu.java.security.Engine;
+
+import java.lang.reflect.InvocationTargetException;
+import java.security.AccessController;
+import java.security.InvalidAlgorithmParameterException;
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+import java.security.PrivilegedAction;
+import java.security.Provider;
+import java.security.Security;
+
+/**
+ * Generic interface to classes that validate certificate paths.
+ *
+ * <p>Using this class is similar to all the provider-based security
+ * classes; the method of interest, {@link
+ * #validate(java.security.cert.CertPath,java.security.cert.CertPathParameters)},
+ * which takes provider-specific implementations of {@link
+ * CertPathParameters}, and return provider-specific implementations of
+ * {@link CertPathValidatorResult}.
+ *
+ * @since JDK 1.4
+ * @see CertPath
+ */
+public class CertPathValidator {
+
+  // Constants and fields.
+  // ------------------------------------------------------------------------
+
+  /** Service name for CertPathValidator. */
+  private static final String CERT_PATH_VALIDATOR = "CertPathValidator";
+
+  /** The underlying implementation. */
+  private final CertPathValidatorSpi validatorSpi;
+
+  /** The provider of this implementation. */
+  private final Provider provider;
+
+  /** The algorithm's name. */
+  private final String algorithm;
+
+  // Constructor.
+  // ------------------------------------------------------------------------
+
+  /**
+   * Creates a new CertPathValidator.
+   *
+   * @param validatorSpi The underlying implementation.
+   * @param provider     The provider of the implementation.
+   * @param algorithm    The algorithm name.
+   */
+  protected CertPathValidator(CertPathValidatorSpi validatorSpi,
+                              Provider provider, String algorithm)
+  {
+    this.validatorSpi = validatorSpi;
+    this.provider = provider;
+    this.algorithm = algorithm;
+  }
+
+  // Class methods.
+  // ------------------------------------------------------------------------
+
+  /**
+   * Returns the default validator type.
+   *
+   * <p>This value may be set at run-time via the security property
+   * "certpathvalidator.type", or the value "PKIX" if this property is
+   * not set.
+   *
+   * @return The default validator type.
+   */
+  public static synchronized String getDefaultType() {
+    String type = (String) AccessController.doPrivileged(
+      new PrivilegedAction()
+        {
+          public Object run()
+          {
+            return Security.getProperty("certpathvalidator.type");
+          }
+        }
+    );
+    if (type == null)
+      type = "PKIX";
+    return type;
+  }
+
+  /**
+   * Returns an instance of the given validator from the first provider that
+   * implements it.
+   *
+   * @param algorithm The name of the algorithm to get.
+   * @return The new instance.
+   * @throws NoSuchAlgorithmException If no installed provider implements the
+   *           requested algorithm.
+   * @throws IllegalArgumentException if <code>algorithm</code> is
+   *           <code>null</code> or is an empty string.
+   */
+  public static CertPathValidator getInstance(String algorithm)
+    throws NoSuchAlgorithmException
+  {
+    Provider[] p = Security.getProviders();
+    NoSuchAlgorithmException lastException = null;
+    for (int i = 0; i < p.length; i++)
+      try
+        {
+          return getInstance(algorithm, p[i]);
+        }
+      catch (NoSuchAlgorithmException x)
+        {
+          lastException = x;
+        }
+    if (lastException != null)
+      throw lastException;
+    throw new NoSuchAlgorithmException(algorithm);
+  }
+
+  /**
+   * Returns an instance of the given validator from the named provider.
+   *
+   * @param algorithm The name of the algorithm to get.
+   * @param provider The name of the provider from which to get the
+   *          implementation.
+   * @return The new instance.
+   * @throws NoSuchAlgorithmException If the named provider does not implement
+   *           the algorithm.
+   * @throws NoSuchProviderException If no provider named <i>provider</i> is
+   *           installed.
+   * @throws IllegalArgumentException if either <code>algorithm</code> or
+   *           <code>provider</code> is <code>null</code>, or if
+   *           <code>algorithm</code> is an empty string.
+   */
+  public static CertPathValidator getInstance(String algorithm, String provider)
+      throws NoSuchAlgorithmException, NoSuchProviderException
+  {
+    if (provider == null)
+      throw new IllegalArgumentException("provider MUST NOT be null");
+    Provider p = Security.getProvider(provider);
+    if (p == null)
+      throw new NoSuchProviderException(provider);
+    return getInstance(algorithm, p);
+  }
+
+  /**
+   * Returns an instance of the given validator from the given provider.
+   *
+   * @param algorithm The name of the algorithm to get.
+   * @param provider The provider from which to get the implementation.
+   * @return The new instance.
+   * @throws NoSuchAlgorithmException If the provider does not implement the
+   *           algorithm.
+   * @throws IllegalArgumentException if either <code>algorithm</code> or
+   *           <code>provider</code> is <code>null</code>, or if
+   *           <code>algorithm</code> is an empty string.
+   */
+  public static CertPathValidator getInstance(String algorithm,
+                                              Provider provider)
+    throws NoSuchAlgorithmException
+  {
+    CPStringBuilder sb = new CPStringBuilder("CertPathValidator for algorithm [")
+        .append(algorithm).append("] from provider[")
+        .append(provider).append("] could not be created");
+    Throwable cause;
+    try
+      {
+        Object spi = Engine.getInstance(CERT_PATH_VALIDATOR, algorithm, provider);
+        return new CertPathValidator((CertPathValidatorSpi) spi, provider, algorithm);
+      }
+    catch (InvocationTargetException x)
+      {
+        cause = x.getCause();
+        if (cause instanceof NoSuchAlgorithmException)
+          throw (NoSuchAlgorithmException) cause;
+        if (cause == null)
+          cause = x;
+      }
+    catch (ClassCastException x)
+      {
+        cause = x;
+      }
+    NoSuchAlgorithmException x = new NoSuchAlgorithmException(sb.toString());
+    x.initCause(cause);
+    throw x;
+  }
+
+  /**
+   * Return the name of this validator.
+   *
+   * @return This validator's name.
+   */
+  public final String getAlgorithm()
+  {
+    return algorithm;
+  }
+
+  /**
+   * Return the provider of this implementation.
+   *
+   * @return The provider.
+   */
+  public final Provider getProvider()
+  {
+    return provider;
+  }
+
+  /**
+   * Attempt to validate a certificate path.
+   *
+   * @param certPath The path to validate.
+   * @param params   The algorithm-specific parameters.
+   * @return The result of this validation attempt.
+   * @throws CertPathValidatorException If the certificate path cannot
+   * be validated.
+   * @throws InvalidAlgorithmParameterException If this implementation
+   * rejects the specified parameters.
+   */
+  public final CertPathValidatorResult validate(CertPath certPath,
+                                                CertPathParameters params)
+    throws CertPathValidatorException, InvalidAlgorithmParameterException
+  {
+    return validatorSpi.engineValidate(certPath, params);
+  }
+}