[+] added : accessmask.py script for parsing ACCESS_MASK structure

git-svn-id: https://pykd.svn.codeplex.com/svn@60687 9b283d60-5439-405e-af05-b73fd8c4d996

snippets/accessmask.py

@@ -0,0 +1,114 @@
+#
+# Access mask parser (c) Ignatich
+#
+
+from pykd import *
+import sys
+import re
+
+AccessMask = {
+	0x00010000 : 'DELETE',
+	0x00020000 : 'READ_CONTROL',
+	0x00040000 : 'WRITE_DAC',
+	0x00080000 : 'WRITE_OWNER',
+	0x00100000 : 'SYNCHRONIZE',
+	0x01000000 : 'ACCESS_SYSTEM_SECURITY',
+	0x02000000 : 'MAXIMUM_ALLOWED'
+	}
+
+GenericMask = {
+	0x10000000 : 'GENERIC_ALL',
+	0x20000000 : 'GENERIC_EXECUTE',
+	0x40000000 : 'GENERIC_WRITE',
+	0x80000000 : 'GENERIC_READ'
+	}
+
+FileAccessMask = {
+	0x0001 : 'FILE_READ_DATA',
+	0x0002 : 'FILE_WRITE_DATA',
+	0x0004 : 'FILE_APPEND_DATA',
+	0x0008 : 'FILE_READ_EA',
+	0x0010 : 'FILE_WRITE_EA',
+	0x0020 : 'FILE_EXECUTE',
+	0x0040 : 'FILE_DELETE_CHILD',
+	0x0080 : 'FILE_READ_ATTRIBUTES',
+	0x0100 : 'FILE_WRITE_ATTRIBUTES'
+	}
+
+ProcessAccessMask = {
+	0x0001 : 'PROCESS_TERMINATE',
+	0x0002 : 'PROCESS_CREATE_THREAD',
+	0x0004 : 'PROCESS_SET_SESSIONID',
+	0x0008 : 'PROCESS_VM_OPERATION',
+	0x0010 : 'PROCESS_VM_READ',
+	0x0020 : 'PROCESS_VM_WRITE',
+	0x0040 : 'PROCESS_DUP_HANDLE',
+	0x0080 : 'PROCESS_CREATE_PROCESS',
+	0x0100 : 'PROCESS_SET_QUOTA',
+	0x0200 : 'PROCESS_SET_INFORMATION',
+	0x0400 : 'PROCESS_QUERY_INFORMATION',
+	0x0800 : 'PROCESS_SUSPEND_RESUME',
+	0x1000 : 'PROCESS_QUERY_LIMITED_INFORMATION'
+	}
+
+ThreadAccessMask = {
+	0x0001 : 'THREAD_TERMINATE',
+	0x0002 : 'THREAD_SUSPEND_RESUME',
+	0x0004 : 'THREAD_ALERT',
+	0x0008 : 'THREAD_GET_CONTEXT',
+	0x0010 : 'THREAD_SET_CONTEXT',
+	0x0020 : 'THREAD_SET_INFORMATION',
+	0x0040 : 'THREAD_QUERY_INFORMATION',
+	0x0080 : 'THREAD_SET_THREAD_TOKEN',
+	0x0100 : 'THREAD_IMPERSONATE',
+	0x0200 : 'THREAD_DIRECT_IMPERSONATION',
+	0x0400 : 'THREAD_SET_LIMITED_INFORMATION',
+	0x0800 : 'THREAD_QUERY_LIMITED_INFORMATION'
+	}
+
+FileMaskSets = [FileAccessMask, AccessMask, GenericMask]
+ProcessMaskSets = [ProcessAccessMask, AccessMask, GenericMask]
+ThreadMaskSets = [ThreadAccessMask, AccessMask, GenericMask]
+GenericMaskSets = [AccessMask, GenericMask]
+
+def parseMask(mask, maskSets) :
+	cnt = 0
+	for i in range(0, 31) :
+		bit = 1 << i
+		for maskSet in maskSets :
+			if (bit & mask) and bit in maskSet:
+				if (cnt != 0) :
+					dprint(" | ")
+					if (cnt % 4 == 0) :
+						dprintln("")
+				dprint("" + maskSet[bit])
+				mask &= ~bit
+				cnt += 1
+	return mask
+
+argc = len(sys.argv)
+
+if argc == 1 :
+	dprintln("Syntax: [object type] &lt;hex mask&gt;")
+	dprintln("Supported object types: process, thread, file, generic")
+	exit("")
+
+type = (argc > 2 and sys.argv[1]) or "generic"
+if argc > 2 :
+	mask = int(sys.argv[2], 16)
+else :
+	mask = int(sys.argv[1], 16)
+
+if type == "file" :
+	mask = parseMask(mask, FileMaskSets)
+elif type == "process" :
+	mask = parseMask(mask, ProcessMaskSets)
+elif type == "thread" :
+	mask = parseMask(mask, ThreadMaskSets)
+elif type == "generic" :
+	mask = parseMask(mask, GenericMaskSets)
+
+dprintln("")
+
+if mask != 0 :
+	dprintln("Unknown bits: 0x%x" % mask)