From 5485da49b04bb139d28d42fe8f3d371915e79a3d Mon Sep 17 00:00:00 2001
From: Fabrice Bacchella <fbacchella@spamcop.net>
Date: Mon, 04 May 2015 05:52:12 -0400
Subject: [PATCH] Adding Kerberos5/GSS authentication to ssh Adding the possibility to define authentication method order for ssh
---
src/main/java/com/gitblit/transport/ssh/SshDaemon.java | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 57 insertions(+), 1 deletions(-)
diff --git a/src/main/java/com/gitblit/transport/ssh/SshDaemon.java b/src/main/java/com/gitblit/transport/ssh/SshDaemon.java
index 9667154..ec7d7c3 100644
--- a/src/main/java/com/gitblit/transport/ssh/SshDaemon.java
+++ b/src/main/java/com/gitblit/transport/ssh/SshDaemon.java
@@ -23,15 +23,25 @@
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.text.MessageFormat;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.sshd.SshServer;
+import org.apache.sshd.common.NamedFactory;
import org.apache.sshd.common.io.IoServiceFactoryFactory;
import org.apache.sshd.common.io.mina.MinaServiceFactoryFactory;
import org.apache.sshd.common.io.nio2.Nio2ServiceFactoryFactory;
import org.apache.sshd.common.keyprovider.FileKeyPairProvider;
import org.apache.sshd.common.util.SecurityUtils;
import org.apache.sshd.server.auth.CachingPublicKeyAuthenticator;
+import org.apache.sshd.server.UserAuth;
+import org.apache.sshd.server.auth.UserAuthKeyboardInteractive;
+import org.apache.sshd.server.auth.UserAuthPassword;
+import org.apache.sshd.server.auth.UserAuthPublicKey;
+import org.apache.sshd.server.auth.gss.GSSAuthenticator;
+import org.apache.sshd.server.auth.gss.UserAuthGSS;
import org.bouncycastle.openssl.PEMWriter;
import org.eclipse.jgit.internal.JGitText;
import org.slf4j.Logger;
@@ -120,7 +130,49 @@
} else {
addr = new InetSocketAddress(bindInterface, port);
}
-
+
+ //Will do GSS ?
+ GSSAuthenticator gssAuthenticator = null;
+ if(settings.getBoolean(Keys.git.sshWithKrb5, false)) {
+ gssAuthenticator = new GSSAuthenticator();
+ String keytabString = settings.getString(Keys.git.sshKrb5Keytab,
+ "");
+ if(! keytabString.isEmpty()) {
+ gssAuthenticator.setKeytabFile(keytabString);
+ }
+ String servicePrincipalName = settings.getString(Keys.git.sshKrb5ServicePrincipalName,
+ "");
+ if(! servicePrincipalName.isEmpty()) {
+ gssAuthenticator.setServicePrincipalName(servicePrincipalName);
+ }
+ }
+
+ //Sort the authenticators for sshd
+ List<NamedFactory<UserAuth>> userAuthFactories = new ArrayList<>();
+ String sshAuthenticatorsOrderString = settings.getString(Keys.git.sshAuthenticatorsOrder,
+ "password,keyboard-interactive,publickey");
+ for(String authenticator: sshAuthenticatorsOrderString.split(",")) {
+ String authenticatorName = authenticator.trim().toLowerCase(Locale.US);
+ switch (authenticatorName) {
+ case "gssapi-with-mic":
+ if(gssAuthenticator != null) {
+ userAuthFactories.add(new UserAuthGSS.Factory());
+ }
+ break;
+ case "publickey":
+ userAuthFactories.add(new UserAuthPublicKey.Factory());
+ break;
+ case "password":
+ userAuthFactories.add(new UserAuthPassword.Factory());
+ break;
+ case "keyboard-interactive":
+ userAuthFactories.add(new UserAuthKeyboardInteractive.Factory());
+ break;
+ default:
+ log.error("Unknown ssh authenticator: '{}'", authenticatorName);
+ }
+ }
+
// Create the SSH server
sshd = SshServer.setUpDefaultServer();
sshd.setPort(addr.getPort());
@@ -128,6 +180,10 @@
sshd.setKeyPairProvider(hostKeyPairProvider);
sshd.setPublickeyAuthenticator(new CachingPublicKeyAuthenticator(keyAuthenticator));
sshd.setPasswordAuthenticator(new UsernamePasswordAuthenticator(gitblit));
+ if(gssAuthenticator != null) {
+ sshd.setGSSAuthenticator(gssAuthenticator);
+ }
+ sshd.setUserAuthFactories(userAuthFactories);
sshd.setSessionFactory(new SshServerSessionFactory());
sshd.setFileSystemFactory(new DisabledFilesystemFactory());
sshd.setTcpipForwardingFilter(new NonForwardingFilter());
--
Gitblit v1.9.1