add asm2scs.py

diff --git a/tools/hack/asm2scs.py b/tools/hack/asm2scs.py
new file mode 100755 (executable)
index 0000000..38ae6fc
--- /dev/null
+++ b/tools/hack/asm2scs.py
@@ -0,0 +1,83 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# ------------------------------------------------------------------------
+#   File Name: asm2scs.py
+#      Author: Zhao Yanbai
+#              2016-07-21 22:08:07 Thursday CST
+# Description: asm to shellcode string
+# ------------------------------------------------------------------------
+
+import os
+import sys
+import argparse
+import commands
+import re
+
+gArgs = None
+
+
+def isValidAddr(addr) :
+    for c in addr :
+        if c not in set(['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f']) :
+            return False
+
+
+    return True
+
+def getShellCode(asmpath) :
+    sc = ''
+    try :
+        cmd = 'nasm -f macho {0} -o {0}.o;otool -tjV {0}.o'.format(asmpath)
+        print cmd
+        output = commands.getoutput(cmd)
+        lines = [line.strip() for line in output.splitlines()]
+        for line in lines :
+            d = line.split('\t')
+            if len(d) < 3 or not isValidAddr(d[0]):
+                continue
+
+            sc += d[1].strip().upper()
+
+    except Exception, e:
+        print("Exception: {0}".format(e))
+
+    return sc
+
+
+def formatShellCode(sc) :
+    fsc = ''
+    if len(sc) % 2 != 0 :
+        print("Invalid ShellCode")
+    else :
+        while sc != '' :
+            fsc += '\\x' + sc[:2]
+            sc = sc[2:]
+
+    print fsc
+    return fsc
+
+def parseArguments() :
+    global gArgs
+    parser = argparse.ArgumentParser(prog='asm2scs', description='asm to shellcode string', epilog='')
+    parser.add_argument('-a', '--asm',      action='store',     default='',     help='asm file path')
+    parser.add_argument('-v', '--version',  action='version',   version='%(prog)s 0.1')
+    gArgs = parser.parse_args()
+
+
+    if not gArgs.asm or gArgs.asm == '' :
+        print("invalid asm file path")
+        return False
+
+    return True
+
+def main() :
+    if not parseArguments() :
+        return False
+
+
+    sc = getShellCode(gArgs.asm)
+    formatShellCode(sc)
+
+
+if __name__ == "__main__" :
+    main()