SERVER-26101 DBDirectClient isn't safe to auth

(cherry picked from commit 73365935a7d2026030a34d89463e72263fe8c25c)

2 files changed, 19 insertions, 1 deletions

diff --git a/jstests/core/evalh.js b/jstests/core/evalh.js
new file mode 100644
index 00000000000..e1058fbdce4
--- /dev/null
+++ b/jstests/core/evalh.js
@@ -0,0 +1,18 @@
+/**
+ * Test that db.eval does not support auth.
+ */
+(function() {
+    'use strict';
+
+    assert.writeOK(db.evalprep.insert({}), "db must exist for eval to succeed");
+    assert(db.evalprep.drop());
+
+    // The db.auth method call getMongo().auth but catches the exception.
+    assert.eq(0, db.eval('db.auth("reader", "reader")'));
+
+    // Call the native implementation auth function and verify it does not exist under the db.eval
+    // javascript context.
+    assert.throws(function() {
+        db.eval('db.getMongo().auth("reader", "reader")');
+    });
+})();
diff --git a/src/mongo/scripting/mozjs/mongo.cpp b/src/mongo/scripting/mozjs/mongo.cpp
index 31164398961..095622e47cc 100644
--- a/src/mongo/scripting/mozjs/mongo.cpp
+++ b/src/mongo/scripting/mozjs/mongo.cpp
@@ -49,7 +49,7 @@ namespace mongo {
 namespace mozjs {
 
 const JSFunctionSpec MongoBase::methods[] = {
-    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(auth, MongoLocalInfo, MongoExternalInfo),
+    MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(auth, MongoExternalInfo),
     MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(
         copyDatabaseWithSCRAM, MongoLocalInfo, MongoExternalInfo),
     MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(cursorFromId, MongoLocalInfo, MongoExternalInfo),