Package org.eclipse.jgit.console

Source Code of org.eclipse.jgit.console.ConsoleCredentialsProvider

/*
* Copyright (C) 2010, Google Inc.
* Copyright (C) 2008, Robin Rosenberg <robin.rosenberg@dewire.com>
* Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
*   notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
*   copyright notice, this list of conditions and the following
*   disclaimer in the documentation and/or other materials provided
*   with the distribution.
*
* - Neither the name of the Eclipse Foundation, Inc. nor the
*   names of its contributors may be used to endorse or promote
*   products derived from this software without specific prior
*   written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

package org.eclipse.jgit.console;

import java.io.Console;

import org.eclipse.jgit.errors.UnsupportedCredentialItem;
import org.eclipse.jgit.transport.ChainingCredentialsProvider;
import org.eclipse.jgit.transport.CredentialItem;
import org.eclipse.jgit.transport.CredentialsProvider;
import org.eclipse.jgit.transport.NetRCCredentialsProvider;
import org.eclipse.jgit.transport.URIish;

/** Interacts with the user during authentication by using the text console. */
public class ConsoleCredentialsProvider extends CredentialsProvider {
  /** Install this implementation as the default. */
  public static void install() {
    final ConsoleCredentialsProvider c = new ConsoleCredentialsProvider();
    if (c.cons == null)
      throw new NoClassDefFoundError(
          ConsoleText.get().noSystemConsoleAvailable);
    CredentialsProvider cp = new ChainingCredentialsProvider(
        new NetRCCredentialsProvider(), c);
    CredentialsProvider.setDefault(cp);
  }

  private final Console cons = System.console();

  @Override
  public boolean isInteractive() {
    return true;
  }

  @Override
  public boolean supports(CredentialItem... items) {
    for (CredentialItem i : items) {
      if (i instanceof CredentialItem.StringType)
        continue;

      else if (i instanceof CredentialItem.CharArrayType)
        continue;

      else if (i instanceof CredentialItem.YesNoType)
        continue;

      else if (i instanceof CredentialItem.InformationalMessage)
        continue;

      else
        return false;
    }
    return true;
  }

  @Override
  public boolean get(URIish uri, CredentialItem... items)
      throws UnsupportedCredentialItem {
    boolean ok = true;
    for (int i = 0; i < items.length && ok; i++) {
      CredentialItem item = items[i];

      if (item instanceof CredentialItem.StringType)
        ok = get((CredentialItem.StringType) item);

      else if (item instanceof CredentialItem.CharArrayType)
        ok = get((CredentialItem.CharArrayType) item);

      else if (item instanceof CredentialItem.YesNoType)
        ok = get((CredentialItem.YesNoType) item);

      else if (item instanceof CredentialItem.InformationalMessage)
        ok = get((CredentialItem.InformationalMessage) item);

      else
        throw new UnsupportedCredentialItem(uri, item.getPromptText());
    }
    return ok;
  }

  private boolean get(CredentialItem.StringType item) {
    if (item.isValueSecure()) {
      char[] v = cons.readPassword("%s: ", item.getPromptText()); //$NON-NLS-1$
      if (v != null) {
        item.setValue(new String(v));
        return true;
      } else {
        return false;
      }
    } else {
      String v = cons.readLine("%s: ", item.getPromptText()); //$NON-NLS-1$
      if (v != null) {
        item.setValue(v);
        return true;
      } else {
        return false;
      }
    }
  }

  private boolean get(CredentialItem.CharArrayType item) {
    if (item.isValueSecure()) {
      char[] v = cons.readPassword("%s: ", item.getPromptText()); //$NON-NLS-1$
      if (v != null) {
        item.setValueNoCopy(v);
        return true;
      } else {
        return false;
      }
    } else {
      String v = cons.readLine("%s: ", item.getPromptText()); //$NON-NLS-1$
      if (v != null) {
        item.setValueNoCopy(v.toCharArray());
        return true;
      } else {
        return false;
      }
    }
  }

  private boolean get(CredentialItem.InformationalMessage item) {
    cons.printf("%s\n", item.getPromptText()); //$NON-NLS-1$
    cons.flush();
    return true;
  }

  private boolean get(CredentialItem.YesNoType item) {
    String r = cons.readLine("%s [%s/%s]? ", item.getPromptText(), //$NON-NLS-1$
        ConsoleText.get().answerYes, ConsoleText.get().answerNo);
    if (r != null) {
      item.setValue(ConsoleText.get().answerYes.equalsIgnoreCase(r));
      return true;
    } else {
      return false;
    }
  }
}
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