GitHub OAuth2 implementation as Gerrit HTTP Auth.

First integration point for allowing  Gerrit to authenticate users through GitHub OAuth.
It relies on the installation of the github-oauth Java library under the $GERRIT_SITE/lib
in order filter all the HTTP requests through the GitHub OAuth 2.0 secure authentication.

In order to configure the GitHub authentication you need to:
- copy the github-oauth into $GERRIT_SITE/lib
- copy the github-plugin into $GERRIT_SITE/plugins
- run the Gerrit init steps by choosing HTTP Auth
- set the GitHub parameters during the GitHub custom init step

Change-Id: I0898994169fec0b477dc8944045ceba9526a4d9c
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d163d47
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+target
+.project
+.classpath
+.settings
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..11069ed
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,201 @@
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diff --git a/github-oauth/pom.xml b/github-oauth/pom.xml
new file mode 100644
index 0000000..b92be3e
--- /dev/null
+++ b/github-oauth/pom.xml
@@ -0,0 +1,64 @@
+<?xml version="1.0"?>
+<!--
+Copyright (C) 2013 The Android Open Source Project
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>com.googlesource.gerrit.plugins.github</groupId>
+    <artifactId>github-parent</artifactId>
+    <version>2.8-SNAPSHOT</version>
+  </parent>
+  <artifactId>github-oauth</artifactId>
+  <name>Gerrit Code Review - GitHub OAuth login</name>
+  <url>http://maven.apache.org</url>
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+  <build>
+  <plugins>
+        <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-shade-plugin</artifactId>
+        <version>1.6</version>
+        <configuration>
+          <promoteTransitiveDependencies>true</promoteTransitiveDependencies>
+          <artifactSet>
+            <excludes>
+              <exclude>com.google.*:*</exclude>
+              <exclude>javax.inject:*:*</exclude>
+              <exclude>aopalliance:aopalliance:*</exclude>
+              <exclude>org.slf4j:*</exclude>
+              <exclude>log4j:log4j:*</exclude>
+              <exclude>commons-lang:*:*</exclude>
+              <exclude>commons-codec:*:*</exclude>
+              <exclude>commons-io:*:*</exclude>
+              <exclude>com.google.guava:*</exclude>
+            </excludes>
+          </artifactSet>
+        </configuration>
+        <executions>
+          <execution>
+            <phase>package</phase>
+            <goals>
+              <goal>shade</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+</project>
diff --git a/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/AuthenticatedHttpRequest.java b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/AuthenticatedHttpRequest.java
new file mode 100644
index 0000000..ccb2d5c
--- /dev/null
+++ b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/AuthenticatedHttpRequest.java
@@ -0,0 +1,81 @@
+// Copyright (C) 2013 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.googlesource.gerrit.plugins.github.oauth;
+
+import java.util.Enumeration;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletRequestWrapper;
+
+import com.google.common.base.Objects;
+
+public class AuthenticatedHttpRequest extends HttpServletRequestWrapper {
+  private String httpHeaderName;
+  private String httpHeaderValue;
+
+  public AuthenticatedHttpRequest(HttpServletRequest request,
+      String authHeaderName, String authHeaderValue) {
+    super(request);
+    this.httpHeaderName = authHeaderName;
+    this.httpHeaderValue = authHeaderValue;
+  }
+
+  @Override
+  public Enumeration<String> getHeaderNames() {
+
+    final Enumeration<String> wrappedHeaderNames = super.getHeaderNames();
+    return new Enumeration<String>() {
+
+      boolean lastElement;
+      boolean headerFound;
+
+      @Override
+      public boolean hasMoreElements() {
+        if (wrappedHeaderNames.hasMoreElements()) {
+          return true;
+        } else if (!lastElement && !headerFound) {
+          return true;
+        } else {
+          return false;
+        }
+      }
+
+      @Override
+      public String nextElement() {
+        if (wrappedHeaderNames.hasMoreElements()) {
+          String nextHeader = wrappedHeaderNames.nextElement();
+          if (nextHeader.equalsIgnoreCase(httpHeaderName)) {
+            headerFound = true;
+          }
+          return nextHeader;
+        } else if (!lastElement && !headerFound) {
+          lastElement = true;
+          return httpHeaderName;
+        } else {
+          return null;
+        }
+      }
+
+    };
+  }
+
+  @Override
+  public String getHeader(String name) {
+    if (name.equalsIgnoreCase(httpHeaderName)) {
+      return httpHeaderValue;
+    } else {
+      return super.getHeader(name);
+    }
+  }
+}
diff --git a/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/GitHubHttpProvider.java b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/GitHubHttpProvider.java
new file mode 100644
index 0000000..d1ed048
--- /dev/null
+++ b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/GitHubHttpProvider.java
@@ -0,0 +1,31 @@
+// Copyright (C) 2013 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.googlesource.gerrit.plugins.github.oauth;
+
+import org.apache.http.client.HttpClient;
+import org.apache.http.impl.client.DefaultHttpClient;
+
+import com.google.inject.Provider;
+
+public class GitHubHttpProvider implements Provider<HttpClient>{
+  private static final GitHubHttpProvider singleton = new GitHubHttpProvider();
+  @Override
+  public HttpClient get() {
+    return new DefaultHttpClient();
+  }
+
+  public static Provider<HttpClient> getInstance() {
+    return singleton;
+  }
+}
diff --git a/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/GitHubLogin.java b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/GitHubLogin.java
new file mode 100644
index 0000000..50018ea
--- /dev/null
+++ b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/GitHubLogin.java
@@ -0,0 +1,50 @@
+package com.googlesource.gerrit.plugins.github.oauth;
+
+import java.io.IOException;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.kohsuke.github.GitHub;
+
+import com.google.inject.Inject;
+import com.google.inject.servlet.SessionScoped;
+import com.googlesource.gerrit.plugins.github.oauth.OAuthProtocol.AccessToken;
+
+@SessionScoped
+public class GitHubLogin {
+  public AccessToken token;
+  public GitHub hub;
+
+  private transient OAuthProtocol oauth;
+
+  @Inject
+  public GitHubLogin(OAuthProtocol oauth) {
+    this.oauth = oauth;
+  }
+
+  public GitHubLogin(GitHub hub, AccessToken token) {
+    this.hub = hub;
+    this.token = token;
+  }
+
+  public boolean isLoggedIn() {
+    return token != null && hub != null;
+  }
+
+  public boolean login(HttpServletRequest request, HttpServletResponse response)
+      throws IOException {
+    if (oauth.isOAuthFinal(request)) {
+      init(oauth.loginPhase2(request, response));
+      return isLoggedIn();
+    } else {
+      oauth.loginPhase1(request, response);
+      return false;
+    }
+  }
+
+  private void init(GitHubLogin initValues) {
+    this.hub = initValues.hub;
+    this.token = initValues.token;
+  }
+}
diff --git a/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthConfig.java b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthConfig.java
new file mode 100644
index 0000000..1ddfe03
--- /dev/null
+++ b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthConfig.java
@@ -0,0 +1,72 @@
+// Copyright (C) 2013 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.googlesource.gerrit.plugins.github.oauth;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import org.eclipse.jgit.lib.Config;
+
+import com.google.common.base.Objects;
+import com.google.gerrit.reviewdb.client.AuthType;
+import com.google.gerrit.server.config.GerritServerConfig;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+
+@Singleton
+public class OAuthConfig {
+  private static final String LOGIN_OAUTH_AUTHORIZE = "/login/oauth/authorize";
+  private static final String GITHUB_URL = "https://github.com";
+  public static final String OAUTH_FINAL = "/oauth";
+  public static final String LOGIN_OAUTH_ACCESS_TOKEN =
+      "/login/oauth/access_token";
+
+  public final String gitHubUrl;
+  public final String gitHubClientId;
+  public final String gitHubClientSecret;
+  public final String httpHeader;
+  public final String gitHubOAuthUrl;
+  public final String oAuthFinalRedirectUrl;
+  public final String gitHubOAuthAccessTokenUrl;
+  public final boolean enabled;
+
+  @Inject
+  public OAuthConfig(@GerritServerConfig Config config)
+      throws MalformedURLException {
+    httpHeader = config.getString("auth", null, "httpHeader");
+    gitHubUrl =
+        Objects.firstNonNull(config.getString("github", null, "url"),
+            GITHUB_URL);
+    gitHubClientId = config.getString("github", null, "clientId");
+    gitHubClientSecret = config.getString("github", null, "clientSecret");
+    gitHubOAuthUrl = getUrl(gitHubUrl, LOGIN_OAUTH_AUTHORIZE);
+    gitHubOAuthAccessTokenUrl = getUrl(gitHubUrl, LOGIN_OAUTH_ACCESS_TOKEN);
+    oAuthFinalRedirectUrl =
+        getUrl(config.getString("gerrit", null, "canonicalWebUrl"), OAUTH_FINAL);
+
+    enabled =
+        config.getString("auth", null, "type").equalsIgnoreCase(
+            AuthType.HTTP.toString());
+  }
+
+  public String getUrl(String baseUrl, String path)
+      throws MalformedURLException {
+    if (baseUrl.indexOf("://") > 0) {
+      return new URL(new URL(baseUrl), path).toExternalForm();
+    } else {
+      return baseUrl + (baseUrl.endsWith("/") ? "" : "/")
+          + (path.startsWith("/") ? path.substring(1) : path);
+    }
+  }
+}
diff --git a/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthCookie.java b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthCookie.java
new file mode 100644
index 0000000..3bf35d5
--- /dev/null
+++ b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthCookie.java
@@ -0,0 +1,29 @@
+// Copyright (C) 2013 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.googlesource.gerrit.plugins.github.oauth;
+
+import javax.servlet.http.Cookie;
+
+public class OAuthCookie extends Cookie {
+  private static final long serialVersionUID = 2771690299147135167L;
+  public static final String OAUTH_COOKIE_NAME = "GerritOAuth";
+
+  public final String user;
+
+  OAuthCookie(String user, String cookieValue) {
+    super(OAUTH_COOKIE_NAME, cookieValue);
+
+    this.user = user;
+  }
+}
diff --git a/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthCookieProvider.java b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthCookieProvider.java
new file mode 100644
index 0000000..2cdaab4
--- /dev/null
+++ b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthCookieProvider.java
@@ -0,0 +1,131 @@
+// Copyright (C) 2013 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.googlesource.gerrit.plugins.github.oauth;
+
+import java.net.URLEncoder;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+
+import javax.crypto.Cipher;
+import javax.crypto.KeyGenerator;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.IvParameterSpec;
+import javax.servlet.http.Cookie;
+
+import org.slf4j.Logger;
+
+public class OAuthCookieProvider {
+  private static final String UTF8 = "UTF-8";
+  private static final String ENC_ALGO_PADDING = "AES/CBC/PKCS5Padding";
+  private static final String JCE_PROVIDER = "SunJCE";
+  private static final String ENC_ALGO = "AES";
+  private static final Logger log = org.slf4j.LoggerFactory
+      .getLogger(OAuthCookieProvider.class);
+  private static final Long COOKIE_TIMEOUT = 15 * 60 * 1000L;
+  private SecretKey aesKey;
+  private byte[] IV;
+  private SecureRandom sessionRnd = new SecureRandom();
+
+
+  void init() {
+    KeyGenerator kgen;
+    try {
+      kgen = KeyGenerator.getInstance(ENC_ALGO);
+      kgen.init(128);
+      SecureRandom sr = new SecureRandom();
+      sr.setSeed(System.currentTimeMillis());
+      byte[] key = new byte[16];
+      IV = new byte[16];
+      sr.nextBytes(key);
+      sr.nextBytes(IV);
+      aesKey = kgen.generateKey();
+      sessionRnd.setSeed(System.currentTimeMillis());
+    } catch (NoSuchAlgorithmException e) {
+      log.error("Cannot find encryption algorithm " + ENC_ALGO);
+      throw new IllegalArgumentException(e);
+    }
+  }
+
+  public OAuthCookie getFromUser(String username) {
+    try {
+      return new OAuthCookie(username, encode(username));
+    } catch (OAuthTokenException e) {
+      return null;
+    }
+  }
+
+  public OAuthCookie getFromCookie(Cookie cookie) {
+    try {
+      return new OAuthCookie(decode(cookie.getValue()), cookie.getValue());
+    } catch (OAuthTokenException e) {
+      return null;
+    }
+  }
+
+  public String encode(String user) throws OAuthTokenException {
+    try {
+      long sessionId = sessionRnd.nextLong();
+      long ts = System.currentTimeMillis();
+      String userSession =
+          String.format("%d/%d/%s", sessionId, ts,
+              URLEncoder.encode(user, UTF8));
+      byte[] plainText =
+          (userSession + "/" + userSession.hashCode()).getBytes(UTF8);
+
+      Cipher cipher = Cipher.getInstance(ENC_ALGO_PADDING, JCE_PROVIDER);
+      cipher.init(Cipher.ENCRYPT_MODE, aesKey, new IvParameterSpec(IV));
+      byte[] enc = cipher.doFinal(plainText);
+      return org.eclipse.jgit.util.Base64.encodeBytes(enc).trim();
+    } catch (Exception e) {
+      log.error("Encryption failed", e);
+      throw new OAuthTokenException("Cannot generate session token for user "
+          + user, e);
+    }
+  }
+
+  public String decode(String sessionToken) throws OAuthTokenException {
+    try {
+      byte[] enc =
+          org.eclipse.jgit.util.Base64.decode(sessionToken.trim().getBytes(),
+              0, sessionToken.length());
+      Cipher cipher = Cipher.getInstance(ENC_ALGO_PADDING, JCE_PROVIDER);
+      cipher.init(Cipher.DECRYPT_MODE, aesKey, new IvParameterSpec(IV));
+
+      String[] clearTextParts =
+          new String(cipher.doFinal(enc), UTF8).split("/");
+
+      isValid(sessionToken, clearTextParts);
+
+      return clearTextParts[2];
+    } catch (Exception e) {
+      log.error("Decryption failed", e);
+      throw new OAuthTokenException("Invalid session token " + sessionToken, e);
+    }
+  }
+
+  private void isValid(String sessionToken, String[] clearTextParts)
+      throws OAuthTokenException {
+    int hashCode = Integer.parseInt(clearTextParts[3]);
+    if (hashCode != (clearTextParts[0] + "/" + clearTextParts[1] + "/" + clearTextParts[2])
+        .hashCode()) {
+      throw new OAuthTokenException("Invalid or forged token " + sessionToken);
+    }
+
+    long ts = Long.parseLong(clearTextParts[1]);
+    if ((System.currentTimeMillis() - ts) > COOKIE_TIMEOUT) {
+      throw new OAuthTokenException("Session token " + sessionToken
+          + " has expired");
+    }
+  }
+}
diff --git a/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthFilter.java b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthFilter.java
new file mode 100644
index 0000000..ce2cfd5
--- /dev/null
+++ b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthFilter.java
@@ -0,0 +1,122 @@
+// Copyright (C) 2013 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.googlesource.gerrit.plugins.github.oauth;
+
+import java.io.IOException;
+import java.net.HttpURLConnection;
+
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.Strings;
+import com.google.gerrit.httpd.WebSession;
+import com.google.gson.Gson;
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+
+public class OAuthFilter implements Filter {
+  private static final org.slf4j.Logger log = LoggerFactory
+      .getLogger(OAuthFilter.class);
+
+  private final OAuthConfig config;
+  private final OAuthCookieProvider cookieProvider;
+  private final OAuthProtocol oauth;
+
+  @Inject
+  public OAuthFilter(OAuthConfig config) {
+    this.config = config;
+    this.cookieProvider = new OAuthCookieProvider();
+    this.oauth =
+        new OAuthProtocol(config, GitHubHttpProvider.getInstance().get(),
+            new Gson());
+  }
+
+  @Override
+  public void init(FilterConfig filterConfig) throws ServletException {
+    cookieProvider.init();
+  }
+
+  @Override
+  public void doFilter(ServletRequest request, ServletResponse response,
+      FilterChain chain) throws IOException, ServletException {
+    if (!config.enabled) {
+      chain.doFilter(request, response);
+      return;
+    }
+
+    HttpServletRequest httpRequest = (HttpServletRequest) request;
+    HttpServletResponse httpResponse = (HttpServletResponse) response;
+    log.info("doFilter(" + httpRequest.getRequestURI() + ")");
+
+    OAuthCookie authCookie = getOAuthCookie(httpRequest);
+    String targetUrl = httpRequest.getParameter("state");
+
+    if (authCookie == null) {
+      if (oauth.isOAuthFinal(httpRequest)) {
+
+        String user =
+            oauth.loginPhase2(httpRequest, httpResponse).hub.getMyself()
+                .getLogin();
+
+        if (user != null) {
+          httpResponse.addCookie(cookieProvider.getFromUser(user));
+          httpResponse.sendRedirect(targetUrl);
+          return;
+        } else {
+          httpResponse.sendError(HttpURLConnection.HTTP_UNAUTHORIZED,
+              "Login failed");
+        }
+      } else {
+        oauth.loginPhase1(httpRequest, httpResponse);
+      }
+      return;
+    } else {
+      HttpServletRequest wrappedRequest =
+          new AuthenticatedHttpRequest(httpRequest, config.httpHeader,
+              authCookie.user);
+
+      if (targetUrl != null && oauth.isOAuthFinal(httpRequest)) {
+        httpResponse.sendRedirect(config.getUrl(targetUrl,
+            OAuthConfig.OAUTH_FINAL) + "?code=" + request.getParameter("code"));
+        return;
+      } else {
+        chain.doFilter(wrappedRequest, response);
+      }
+    }
+  }
+
+  private OAuthCookie getOAuthCookie(HttpServletRequest request) {
+    for (Cookie cookie : request.getCookies()) {
+      if (cookie.getName().equalsIgnoreCase(OAuthCookie.OAUTH_COOKIE_NAME)
+          && !Strings.isNullOrEmpty(cookie.getValue())) {
+        return cookieProvider.getFromCookie(cookie);
+      }
+    }
+    return null;
+  }
+
+  @Override
+  public void destroy() {
+    log.info("Init");
+  }
+}
diff --git a/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthProtocol.java b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthProtocol.java
new file mode 100644
index 0000000..92562e6
--- /dev/null
+++ b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthProtocol.java
@@ -0,0 +1,114 @@
+package com.googlesource.gerrit.plugins.github.oauth;
+
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.UnsupportedEncodingException;
+import java.net.HttpURLConnection;
+import java.net.URLEncoder;
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.http.HttpResponse;
+import org.apache.http.NameValuePair;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.entity.UrlEncodedFormEntity;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.message.BasicNameValuePair;
+import org.apache.http.protocol.HTTP;
+import org.kohsuke.github.GHMyself;
+import org.kohsuke.github.GitHub;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.gson.Gson;
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+import com.google.inject.Singleton;
+
+@Singleton
+public class OAuthProtocol {
+  private static final Logger log = LoggerFactory.getLogger(OAuthProtocol.class);
+  
+  private final OAuthConfig config;
+  private final HttpClient http;
+  private final Gson gson;
+  
+  public static class AccessToken {
+    public String access_token;
+    public String token_type;
+  }
+  
+  @Inject
+  public OAuthProtocol(OAuthConfig config, HttpClient httpClient, Gson gson) {
+    this.config = config;
+    this.http = httpClient;
+    this.gson = gson;
+  }
+
+  public void loginPhase1(HttpServletRequest request,
+      HttpServletResponse response) throws IOException {
+    response.sendRedirect(String.format(
+        "%s?client_id=%s&redirect_uri=%s&state=%s", config.gitHubOAuthUrl,
+        config.gitHubClientId, getURLEncoded(config.oAuthFinalRedirectUrl),
+        getURLEncoded(request.getRequestURI().toString())));
+  }
+  
+  public boolean isOAuthFinal(HttpServletRequest request) {
+    return request.getRequestURI().endsWith(OAuthConfig.OAUTH_FINAL);
+  }
+  
+  public GitHubLogin loginPhase2(HttpServletRequest request,
+      HttpServletResponse response) throws IOException {
+
+    HttpPost post = null;
+
+    post = new HttpPost(config.gitHubOAuthAccessTokenUrl);
+    post.setHeader("Accept", "application/json");
+    List<NameValuePair> nvps = new ArrayList<NameValuePair>();
+    nvps.add(new BasicNameValuePair("client_id", config.gitHubClientId));
+    nvps.add(new BasicNameValuePair("client_secret", config.gitHubClientSecret));
+    nvps.add(new BasicNameValuePair("code", request.getParameter("code")));
+    try {
+      post.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
+    } catch (UnsupportedEncodingException e) {
+      // Will never happen
+    }
+
+    try {
+      HttpResponse postResponse = http.execute(post);
+      if (postResponse.getStatusLine().getStatusCode() != HttpURLConnection.HTTP_OK) {
+        log.error("POST " + config.gitHubOAuthAccessTokenUrl
+            + " request for access token failed with status "
+            + postResponse.getStatusLine());
+        response.sendError(HttpURLConnection.HTTP_UNAUTHORIZED,
+            "Request for access token not authorised");
+        postResponse.getEntity().consumeContent();
+        return null;
+      }
+
+      AccessToken token =
+          gson.fromJson(new InputStreamReader(postResponse.getEntity()
+              .getContent(), "UTF-8"), AccessToken.class);
+      GitHub github = GitHub.connectUsingOAuth(token.access_token);
+      return new GitHubLogin(github, token);
+    } catch (IOException e) {
+      log.error("POST " + config.gitHubOAuthAccessTokenUrl
+          + " request for access token failed", e);
+      response.sendError(HttpURLConnection.HTTP_UNAUTHORIZED,
+          "Request for access token not authorised");
+      return null;
+    }
+  }
+  
+  private String getURLEncoded(String url) {
+    try {
+      return URLEncoder.encode(url, "UTF-8");
+    } catch (UnsupportedEncodingException e) {
+      // UTF-8 is hardcoded, cannot fail
+      return null;
+    }
+  }
+}
diff --git a/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthTokenException.java b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthTokenException.java
new file mode 100644
index 0000000..3ee1291
--- /dev/null
+++ b/github-oauth/src/main/java/com/googlesource/gerrit/plugins/github/oauth/OAuthTokenException.java
@@ -0,0 +1,27 @@
+// Copyright (C) 2013 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.googlesource.gerrit.plugins.github.oauth;
+
+public class OAuthTokenException extends Exception {
+  public OAuthTokenException(String message, Exception e) {
+    super(message, e);
+  }
+
+  public OAuthTokenException(String message) {
+    super(message);
+  }
+
+  private static final long serialVersionUID = -2177841968402814337L;
+
+}
diff --git a/github-plugin/.gitignore b/github-plugin/.gitignore
new file mode 100644
index 0000000..80d6257
--- /dev/null
+++ b/github-plugin/.gitignore
@@ -0,0 +1,5 @@
+/target
+/.classpath
+/.project
+/.settings/org.maven.ide.eclipse.prefs
+/.settings/org.eclipse.m2e.core.prefs
diff --git a/github-plugin/LICENSE b/github-plugin/LICENSE
new file mode 100644
index 0000000..11069ed
--- /dev/null
+++ b/github-plugin/LICENSE
@@ -0,0 +1,201 @@
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+   "License" shall mean the terms and conditions for use, reproduction,
+   and distribution as defined by Sections 1 through 9 of this document.
+
+   "Licensor" shall mean the copyright owner or entity authorized by
+   the copyright owner that is granting the License.
+
+   "Legal Entity" shall mean the union of the acting entity and all
+   other entities that control, are controlled by, or are under common
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+   direction or management of such entity, whether by contract or
+   otherwise, or (ii) ownership of fifty percent (50%) or more of the
+   outstanding shares, or (iii) beneficial ownership of such entity.
+
+   "You" (or "Your") shall mean an individual or Legal Entity
+   exercising permissions granted by this License.
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+   "Source" form shall mean the preferred form for making modifications,
+   including but not limited to software source code, documentation
+   source, and configuration files.
+
+   "Object" form shall mean any form resulting from mechanical
+   transformation or translation of a Source form, including but
+   not limited to compiled object code, generated documentation,
+   and conversions to other media types.
+
+   "Work" shall mean the work of authorship, whether in Source or
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+   "Derivative Works" shall mean any work, whether in Source or Object
+   form, that is based on (or derived from) the Work and for which the
+   editorial revisions, annotations, elaborations, or other modifications
+   represent, as a whole, an original work of authorship. For the purposes
+   of this License, Derivative Works shall not include works that remain
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+
+   "Contribution" shall mean any work of authorship, including
+   the original version of the Work and any modifications or additions
+   to that Work or Derivative Works thereof, that is intentionally
+   submitted to Licensor for inclusion in the Work by the copyright owner
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+   to the Licensor or its representatives, including but not limited to
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+   Licensor for the purpose of discussing and improving the Work, but
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+   "Contributor" shall mean Licensor and any individual or Legal Entity
+   on behalf of whom a Contribution has been received by Licensor and
+   subsequently incorporated within the Work.
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+2. Grant of Copyright License. Subject to the terms and conditions of
+   this License, each Contributor hereby grants to You a perpetual,
+   worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+   copyright license to reproduce, prepare Derivative Works of,
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+3. Grant of Patent License. Subject to the terms and conditions of
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+4. Redistribution. You may reproduce and distribute copies of the
+   Work or Derivative Works thereof in any medium, with or without
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+   meet the following conditions:
+
+   (a) You must give any other recipients of the Work or
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+
+   (b) You must cause any modified files to carry prominent notices
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+
+   (c) You must retain, in the Source form of any Derivative Works
+       that You distribute, all copyright, patent, trademark, and
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+
+   (d) If the Work includes a "NOTICE" text file as part of its
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+       of the NOTICE file are for informational purposes only and
+       do not modify the License. You may add Your own attribution
+       notices within Derivative Works that You distribute, alongside
+       or as an addendum to the NOTICE text from the Work, provided
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+   You may add Your own copyright statement to Your modifications and
+   may provide additional or different license terms and conditions
+   for use, reproduction, or distribution of Your modifications, or
+   for any such Derivative Works as a whole, provided Your use,
+   reproduction, and distribution of the Work otherwise complies with
+   the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise,
+   any Contribution intentionally submitted for inclusion in the Work
+   by You to the Licensor shall be under the terms and conditions of
+   this License, without any additional terms or conditions.
+   Notwithstanding the above, nothing herein shall supersede or modify
+   the terms of any separate license agreement you may have executed
+   with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade
+   names, trademarks, service marks, or product names of the Licensor,
+   except as required for reasonable and customary use in describing the
+   origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or
+   agreed to in writing, Licensor provides the Work (and each
+   Contributor provides its Contributions) on an "AS IS" BASIS,
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+
+8. Limitation of Liability. In no event and under no legal theory,
+   whether in tort (including negligence), contract, or otherwise,
+   unless required by applicable law (such as deliberate and grossly
+   negligent acts) or agreed to in writing, shall any Contributor be
+   liable to You for damages, including any direct, indirect, special,
+   incidental, or consequential damages of any character arising as a
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+   Work (including but not limited to damages for loss of goodwill,
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+   other commercial damages or losses), even if such Contributor
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+   the Work or Derivative Works thereof, You may choose to offer,
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+   or other liability obligations and/or rights consistent with this
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+   on Your own behalf and on Your sole responsibility, not on behalf
+   of any other Contributor, and only if You agree to indemnify,
+   defend, and hold each Contributor harmless for any liability
+   incurred by, or claims asserted against, such Contributor by reason
+   of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work.
+
+   To apply the Apache License to your work, attach the following
+   boilerplate notice, with the fields enclosed by brackets "[]"
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+Copyright [yyyy] [name of copyright owner]
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+Licensed under the Apache License, Version 2.0 (the "License");
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+You may obtain a copy of the License at
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+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
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diff --git a/github-plugin/pom.xml b/github-plugin/pom.xml
new file mode 100644
index 0000000..77c706e
--- /dev/null
+++ b/github-plugin/pom.xml
@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="UTF-8"?>

+<!--
+Copyright (C) 2013 The Android Open Source Project
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->

+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

+  <modelVersion>4.0.0</modelVersion>

+  <parent>

+    <artifactId>github-parent</artifactId>

+    <groupId>com.googlesource.gerrit.plugins.github</groupId>

+    <version>2.8-SNAPSHOT</version>

+  </parent>

+

+  <artifactId>github-plugin</artifactId>

+  <packaging>jar</packaging>

+  <name>Gerrit Code Review - GitHub plugin</name>

+

+  <properties>

+    <Gerrit-ApiType>plugin</Gerrit-ApiType>

+    <Gerrit-ApiVersion>${project.version}</Gerrit-ApiVersion>

+  </properties>

+

+  <build>

+    <plugins>

+      <plugin>

+        <groupId>org.apache.maven.plugins</groupId>

+        <artifactId>maven-jar-plugin</artifactId>

+        <version>2.4</version>

+        <configuration>

+          <archive>

+            <manifestEntries>

+              <Gerrit-Module>com.googlesource.gerrit.plugins.github.Module</Gerrit-Module>

+              <Gerrit-InitStep>com.googlesource.gerrit.plugins.github.InitGitHub</Gerrit-InitStep>

+

+              <Implementation-Vendor>GerritForge</Implementation-Vendor>

+              <Implementation-URL>http://www.gerritforge.com</Implementation-URL>

+

+              <Implementation-Title>${Gerrit-ApiType} ${project.artifactId}</Implementation-Title>

+              <Implementation-Version>${project.version}</Implementation-Version>

+

+              <Gerrit-ApiType>${Gerrit-ApiType}</Gerrit-ApiType>

+              <Gerrit-ApiVersion>${Gerrit-ApiVersion}</Gerrit-ApiVersion>

+            </manifestEntries>

+          </archive>

+        </configuration>

+      </plugin>

+

+      <plugin>

+        <groupId>org.apache.maven.plugins</groupId>

+        <artifactId>maven-compiler-plugin</artifactId>

+        <version>2.3.2</version>

+        <configuration>

+          <source>1.6</source>

+          <target>1.6</target>

+          <encoding>UTF-8</encoding>

+        </configuration>

+      </plugin>

+    </plugins>

+  </build>

+

+  <dependencies>

+    <dependency>

+      <groupId>com.google.gerrit</groupId>

+      <artifactId>gerrit-${Gerrit-ApiType}-api</artifactId>

+      <version>${Gerrit-ApiVersion}</version>

+      <scope>provided</scope>

+    </dependency>

+

+    <dependency>

+      <groupId>junit</groupId>

+      <artifactId>junit</artifactId>

+      <version>4.8.1</version>

+      <scope>test</scope>

+    </dependency>

+  </dependencies>

+

+  <repositories>

+    <repository>

+      <id>gerrit-api-repository</id>

+      <url>https://gerrit-api.commondatastorage.googleapis.com/snapshot/</url>

+    </repository>

+  </repositories>

+</project>

diff --git a/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/InitGitHub.java b/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/InitGitHub.java
new file mode 100644
index 0000000..ffc7da5
--- /dev/null
+++ b/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/InitGitHub.java
@@ -0,0 +1,55 @@
+// Copyright (C) 2013 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.googlesource.gerrit.plugins.github;
+
+import com.google.gerrit.pgm.init.InitStep;
+import com.google.gerrit.pgm.init.Section;
+import com.google.gerrit.pgm.util.ConsoleUI;
+import com.google.inject.Inject;
+
+public class InitGitHub implements InitStep {
+  private final ConsoleUI ui;
+  private final Section auth;
+  private final Section httpd;
+  private Section github;
+
+  @Inject
+  InitGitHub(final ConsoleUI ui, final Section.Factory sections) {
+    this.ui = ui;
+    this.github = sections.get("github", null);
+    this.httpd = sections.get("httpd", null);
+    this.auth = sections.get("auth", null);
+  }
+
+  @Override
+  public void run() throws Exception {
+    ui.header("GitHub Integration");
+
+    github.string("GitHub URL", "url", "https://github.com");
+
+    boolean gitHubAuth = ui.yesno(true, "Use GitHub for Gerrit login ?");
+    if(gitHubAuth) {
+      configureAuth();
+    }
+  }
+
+  private void configureAuth() {
+    github.string("ClientId", "clientId", null);
+    github.string("ClientSecret", "clientSecret", null);
+
+    auth.string("HTTP Authentication Header", "httpHeader", "GITHUB_USER");
+    auth.set("type", "HTTP");
+    httpd.set("filterClass", "com.googlesource.gerrit.plugins.github.oauth.OAuthFilter");
+  }
+}
diff --git a/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/Module.java b/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/Module.java
new file mode 100644
index 0000000..d608e64
--- /dev/null
+++ b/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/Module.java
@@ -0,0 +1,23 @@
+// Copyright (C) 2013 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.googlesource.gerrit.plugins.github;
+
+import com.google.inject.AbstractModule;
+
+class Module extends AbstractModule {
+  @Override
+  protected void configure() {
+  }
+}
diff --git a/github-plugin/src/main/resources/Documentation/config.md b/github-plugin/src/main/resources/Documentation/config.md
new file mode 100644
index 0000000..2d18944
--- /dev/null
+++ b/github-plugin/src/main/resources/Documentation/config.md
@@ -0,0 +1,36 @@
+Plugin @PLUGIN@
+===============
+
+This plugins allows to integrate Gerrit with external set of users configured
+on GitHub.
+It relies on the installation of the github-oauth Java library under the $GERRIT_SITE/lib
+in order filter all the HTTP requests through the GitHub OAuth 2.0 secure authentication.
+
+GitHub init step
+----------------
+
+This plugin provides a customized Gerrit init step for the self-configuration of
+the main GitHub and Gerrit authentication settings for allowing the github-oauth
+library to work properly.
+
+GitHub OAuth library rely on Gerrit HTTP authentication defined during the standard
+Gerrit init steps.
+See below a sample session of relevant init steps for a default
+configuration pointing to the Web GitHub instance:
+
+	*** User Authentication
+	***
+
+	Authentication method          []: HTTP
+	Get username from custom HTTP header [Y/n]? Y
+	Username HTTP header           []: GITHUB_USER
+	SSO logout URL                 : /oauth/reset
+
+
+	*** GitHub Integration
+	***
+
+	GitHub URL                     [https://github.com]:
+	Use GitHub for Gerrit login ?  [Y/n]? Y
+	ClientId                       []: 384cbe2e8d98192f9799
+	ClientSecret                   []: f82c3f9b3802666f2adcc4c8cacfb164295b0a99
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..2741a35
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,299 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright (C) 2013 The Android Open Source Project
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.googlesource.gerrit.plugins.github</groupId>
+  <artifactId>github-parent</artifactId>
+  <version>2.8-SNAPSHOT</version>
+  <name>Gerrit Code Review - GitHub integration</name>
+  <url>http://www.gerritforge.com</url>
+  <packaging>pom</packaging>
+  <licenses>
+    <license>
+      <name>Apache License, 2.0</name>
+      <comments>
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      including but not limited to software source code, documentation
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+      "Work" shall mean the work of authorship, whether in Source or
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+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
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+      of this License, Derivative Works shall not include works that remain
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+      "Contribution" shall mean any work of authorship, including
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+      "Contributor" shall mean Licensor and any individual or Legal Entity
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+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
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+
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+
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+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
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+      Work (including but not limited to damages for loss of goodwill,
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+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
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+      file or class name and description of purpose be included on the
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+   Copyright [yyyy] [name of copyright owner]
+
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+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+      </comments>
+    </license>
+  </licenses>
+  <modules>
+    <module>github-oauth</module>
+    <module>github-plugin</module>
+  </modules>
+  <dependencies>
+    <dependency>
+      <groupId>com.google.gerrit</groupId>
+      <artifactId>gerrit-plugin-api</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>javax.servlet</groupId>
+      <artifactId>javax.servlet-api</artifactId>
+      <version>3.0.1</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.google.inject</groupId>
+      <artifactId>guice</artifactId>
+      <version>3.0</version>
+    </dependency>
+    <dependency>
+      <groupId>com.google.guava</groupId>
+      <artifactId>guava</artifactId>
+      <version>14.0</version>
+    </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+      <version>1.7.5</version>
+    </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-log4j12</artifactId>
+      <version>1.7.5</version>
+    </dependency>
+    <dependency>
+      <groupId>log4j</groupId>
+      <artifactId>log4j</artifactId>
+      <version>1.2.17</version>
+    </dependency>
+    <dependency>
+      <groupId>org.jenkins-ci.plugins</groupId>
+      <artifactId>github-api</artifactId>
+      <version>1.40</version>
+    </dependency>
+  </dependencies>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.1</version>
+        <configuration>
+          <source>1.6</source>
+          <target>1.6</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <repositories>
+    <repository>
+      <id>repo.jenkins-ci.org</id>
+      <url>http://repo.jenkins-ci.org/public/</url>
+    </repository>
+  </repositories>
+</project>