[PATCH] Permit a wider range of repository names in jgit daemon requests

["Shawn O. Pearce" <spearce@spearce.org>]

The earlier restriction was too narrow for some applications, for
example repositories named "jgit.dev" and "jgit.test" are perfectly
valid Git repositories and should still be able to be served by
the daemon.

By blocking out only uses of ".." as a path component and Windows
UNC paths (by blocking "\") we can reasonably prevent the client
from escaping the base dirctories configured in the daemon.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
---
  Robin Rosenberg <robin.rosenberg@dewire.com> wrote:
  > tisdag 23 december 2008 01:27:23 skrev Shawn O. Pearce:
  > > +	private static final Pattern SAFE_REPOSITORY_NAME = Pattern
  > > +			.compile("^[A-Za-z][A-Za-z0-9/_ -]+(\\.git)?$");
  > 
  > This restriction is too strict. Wouldn't any path not containing ".." be valid? In particular this did not work with my "EGIT.contrib" repo. I
  > have a lot of repos with names llike "name.purpose". Just adding
  > '.' to the character set isn't really enough.

  Yup.
  
 .../src/org/spearce/jgit/transport/Daemon.java     |   42 +++++++++----------
 1 files changed, 20 insertions(+), 22 deletions(-)

diff --git a/org.spearce.jgit/src/org/spearce/jgit/transport/Daemon.java b/org.spearce.jgit/src/org/spearce/jgit/transport/Daemon.java
index 646c88d..d39fd04 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/transport/Daemon.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/transport/Daemon.java
@@ -51,7 +51,6 @@
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.Map;
-import java.util.regex.Pattern;
 
 import org.spearce.jgit.lib.Repository;
 
@@ -62,9 +61,6 @@
 
 	private static final int BACKLOG = 5;
 
-	private static final Pattern SAFE_REPOSITORY_NAME = Pattern
-			.compile("^[A-Za-z][A-Za-z0-9/_ -]+(\\.git)?$");
-
 	private InetSocketAddress myAddress;
 
 	private final DaemonService[] services;
@@ -292,24 +288,26 @@ synchronized (exports) {
 				return db;
 		}
 
-		if (SAFE_REPOSITORY_NAME.matcher(name).matches()) {
-			final File[] search;
-			synchronized (exportBase) {
-				search = exportBase.toArray(new File[exportBase.size()]);
-			}
-			for (final File f : search) {
-				db = openRepository(new File(f, name));
-				if (db != null)
-					return db;
-
-				db = openRepository(new File(f, name + ".git"));
-				if (db != null)
-					return db;
-
-				db = openRepository(new File(f, name + "/.git"));
-				if (db != null)
-					return db;
-			}
+		if (name.startsWith("../") || name.contains("/../")
+				|| name.contains("\\"))
+			return null;
+
+		final File[] search;
+		synchronized (exportBase) {
+			search = exportBase.toArray(new File[exportBase.size()]);
+		}
+		for (final File f : search) {
+			db = openRepository(new File(f, name));
+			if (db != null)
+				return db;
+
+			db = openRepository(new File(f, name + ".git"));
+			if (db != null)
+				return db;
+
+			db = openRepository(new File(f, name + "/.git"));
+			if (db != null)
+				return db;
 		}
 		return null;
 	}
-- 
1.6.1.94.g9388

-- 
Shawn.