rpc: add Subject into RpcAuth class

This patch adds Subject into RpcAuth.
It based on stand-alone dcache-auth package.
Acked-By: Tatjana Baranova <tatjana.baranova@desy.de>

pom.xml

@@ -256,6 +256,11 @@
             <artifactId>chimera-core</artifactId>
             <version>0.0.9</version>
         </dependency>
+        <dependency>
+            <groupId>org.dcache.common</groupId>
+            <artifactId>dcache-auth</artifactId>
+            <version>0.0.10-SNAPSHOT</version>
+        </dependency>
     </dependencies>
 
     <!--
@@ -281,6 +286,12 @@
             <url>http://www.dcache.org/nexus/content/groups/public/</url>
             <layout>default</layout>
         </repository>
+        <repository>
+            <id>dcache-snapshots</id>
+            <name>dCache.ORG snapshots repository</name>
+            <url>http://www.dcache.org/nexus/content/repositories/snapshots</url>
+            <layout>default</layout>
+        </repository>
     </repositories>
 
     <properties>

src/org/dcache/chimera/nfs/NfsUser.java

@@ -16,18 +16,16 @@
  */
 package org.dcache.chimera.nfs;
 
+import javax.security.auth.Subject;
 import org.dcache.chimera.posix.UnixUser;
-import org.dcache.xdr.RpcAuthType;
-import org.dcache.xdr.RpcAuthTypeUnix;
 import org.dcache.xdr.RpcCall;
+import org.dcache.auth.Subjects;
 
 /**
  * Utility class extract user record from NFS request
  */
 public class NfsUser {
 
-    private final static int[] NO_GROUPS = new int[0];
-
     /*no instances allowed*/
     private NfsUser() {
     }
@@ -35,15 +33,14 @@ public class NfsUser {
     public static UnixUser remoteUser(RpcCall call, ExportFile exports) {
 
         UnixUser user;
-        int uid = -1;
-        int gid = -1;
-        int[] gids = NO_GROUPS;
-
-        if (call.getCredential().type() == RpcAuthType.UNIX) {
-            uid = ((RpcAuthTypeUnix) call.getCredential()).uid();
-            gid = ((RpcAuthTypeUnix) call.getCredential()).gid();
-            gids = ((RpcAuthTypeUnix) call.getCredential()).gids();
-        }
+        int uid;
+        int gid;
+        int[] gids;
+
+        Subject subject = call.getCredential().getSubject();
+        uid = Subjects.getUid(subject);
+        gids = Subjects.getGids(subject);
+        gid = gids.length > 0 ? gids[0] : -1;
 
         String host = call.getTransport().getRemoteSocketAddress().getAddress().getHostName();
 

src/org/dcache/chimera/nfs/v3/HimeraNfsUtils.java

@@ -33,6 +33,7 @@ import org.dcache.chimera.nfs.v3.xdr.size3;
 import org.dcache.chimera.nfs.v3.xdr.time_how;
 import org.dcache.chimera.nfs.v3.xdr.wcc_attr;
 import java.util.concurrent.TimeUnit;
+import javax.security.auth.Subject;
 
 import org.dcache.chimera.FsInode;
 import org.dcache.chimera.ChimeraFsException;

src/org/dcache/xdr/RpcAuth.java

@@ -17,6 +17,8 @@
 
 package org.dcache.xdr;
 
+import javax.security.auth.Subject;
+
 public interface RpcAuth extends XdrAble {
 
     /**
@@ -40,4 +42,10 @@ public interface RpcAuth extends XdrAble {
      * @return verifier.
      */
     RpcAuthVerifier getVerifier();
+
+    /**
+     * Get {@link Subject} associated with credentials.
+     * @return subject.
+     */
+    Subject getSubject();
 }

src/org/dcache/xdr/RpcAuthTypeNone.java

@@ -19,12 +19,15 @@ package org.dcache.xdr;
 
 import java.io.IOException;
 import java.util.logging.Logger;
+import javax.security.auth.Subject;
+import org.dcache.auth.Subjects;
 
 public class RpcAuthTypeNone implements RpcAuth, XdrAble {
 
     private final int _type =  RpcAuthType.NONE;
     private byte[] body;
     private RpcAuthVerifier _verifier = new RpcAuthVerifier(RpcAuthType.NONE, new byte[0]);
+    private final Subject _subject = Subjects.NOBODY;
 
     private final static Logger _log = Logger.getLogger(RpcAuthTypeNone.class.getName());
 
@@ -36,6 +39,11 @@ public class RpcAuthTypeNone implements RpcAuth, XdrAble {
         this.body = body;
     }
 
+    @Override
+    public Subject getSubject() {
+        return _subject;
+    }
+
     @Override
     public int type() {
         return _type;

src/org/dcache/xdr/RpcAuthTypeUnix.java

@@ -20,6 +20,8 @@ package org.dcache.xdr;
 import java.io.IOException;
 import java.util.logging.Logger;
 import java.util.Arrays;
+import javax.security.auth.Subject;
+import org.dcache.auth.Subjects;
 
 public class RpcAuthTypeUnix implements RpcAuth, XdrAble {
 
@@ -32,6 +34,7 @@ public class RpcAuthTypeUnix implements RpcAuth, XdrAble {
     private int _gids[];
     private int _stamp;
     private String _machine;
+    private Subject _subject;
 
     private final static Logger _log = Logger.getLogger(RpcAuthTypeUnix.class.getName());
 
@@ -47,6 +50,8 @@ public class RpcAuthTypeUnix implements RpcAuth, XdrAble {
                 4/*machine len place holder*/ + _machine.length() +
                 ((4 - (_machine.length() & 3)) & 3) /*padding bytes*/+
                  + 4/*stamp*/;
+
+        _subject = Subjects.of(_uid, _gid, _gids);
     }
 
     public void xdrDecode(XdrDecodingStream xdr) throws OncRpcException, IOException {
@@ -58,6 +63,13 @@ public class RpcAuthTypeUnix implements RpcAuth, XdrAble {
         _gid = xdr.xdrDecodeInt();
         _gids = xdr.xdrDecodeIntVector();
         _verifier.xdrDecode(xdr);
+
+        _subject = Subjects.of(_uid, _gid, _gids);
+    }
+
+    @Override
+    public Subject getSubject() {
+        return _subject;
     }
 
     @Override