Merge pull request #32 from jshlbrd/jshlbrd/class

adding class file parsing module

etc/framework/dispatch.yara

@@ -259,6 +259,7 @@ rule type_is_lnk
 rule type_is_java_class
 {
     meta:
+        scan_modules = "META_JAVA_CLASS"
         file_type = "class"
     condition:
         uint32(0) == 0xbebafeca

laikaboss/modules/meta_java_class.py

@@ -0,0 +1,46 @@
+# Copyright 2016 Josh Liburdi
+#
+# 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.
+#
+from laikaboss.si_module import SI_MODULE
+from laikaboss.objectmodel import ScanError
+from javatools import unpack_class, Unimplemented, ClassUnpackException
+
+class META_JAVA_CLASS(SI_MODULE):
+    def __init__(self,):
+        self.module_name = "META_JAVA_CLASS"
+
+    def _run(self, scanObject, result, depth, args):
+        moduleResult = []
+
+        try:
+            class_obj = unpack_class(scanObject.buffer)
+
+            class_requires = class_obj.get_requires()
+            scanObject.addMetadata(self.module_name, 'Requires', class_requires)
+
+            class_provides = class_obj.get_provides()
+            scanObject.addMetadata(self.module_name, 'Provides', class_provides)
+
+            class_constants = tuple(class_obj.cpool.pretty_constants())
+            constantsDict = dict((i,v) for i,t,v in class_constants)
+            scanObject.addMetadata(self.module_name, 'Constants', constantsDict)
+
+        except ScanError:
+            raise
+        except Unimplemented:
+            scanObject.addFlag('java_class:err:unimplemented_feature')
+        except ClassUnpackException:
+            scanObject.addFlag('java_class:err:class_unpack_exception')
+
+        return moduleResult