Python读取PE文件（exe/dll）中的时间戳

代码原文地址：

https://www.snip2code.com/Snippet/144008/Read-the-PE-Timestamp-from-a-Windows-Exe

https://gist.github.com/03152ba1a148d9475e81

直接上代码吧，引用过来以防链接失效：

 #! /usr/bin/env python2.7
 #
 # Author: Pat Litke (C) 2014
 #
 # This code is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as
 # published by the Free Software Foundation, either version 3 of the
 # License, or (at your option) any later version.
 #
 # This code is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with Baku.  If not, see <http://www.gnu.org/licenses/>.
 #
 # Description:
 # Quick and dirty module to read a binary file, look at the DOS header for the PE offset
 #   Seek to the PE offset, read the third DWORD in, unpack it, and return either EPOCH or GMTIMEs
 #
 # Returns 1 if the file doesn't havea a DOS header
 # Returns 2 if file couldn't be read
 # Returns the data in epoch or formatted otherwise

 from struct import unpack
 from binascii import hexlify
 from time import gmtime, strftime

 def getEpoch(filePath, epoch = True):

     # Open the file in Binary mode
     try:
         handle = open(filePath, 'rb')
         if hexlify(handle.read(2)) != hexlify(u'MZ'):
             handle.close()
             return 1
     except:
         return 2

     # Get PE offset (@60, DWORD) from DOS header
     #    It's little-endian so we have to flip it
     #    We also need the HEX representation which is an INT value
     handle.seek(60, 0)
     offset = handle.read(4)
     offset = hexlify(offset[::-1])
     offset = int(offset, 16)

     # Seek to PE header and read second DWORD
     handle.seek(offset+8, 0)
     dword = handle.read(4)
     handle.close()
     t = unpack(">L", dword[::-1])[0]

     if epoch:
         return t
     else:
         return strftime('%Y-%m-%d %H:%M:%S', gmtime(float(t)))

 def getUTC(filePath):
     return getEpoch(filepath, False)

 def getBoth(filePath):
     return [getEpoch(filepath), getEpoch(filepath, False)]

如果想修改这个时间戳，按照上述规则，pack后写入即可，另外其中53行那句有些麻烦，其实这么写就可以了：t = unpack("<L", dword)[0] ，即按照小端直接解码即可。

更新：

更强大的修改PE文件时间戳的方式如下，而且支持PE文件与pdb一切修改，还可以顺道修改guid：

https://github.com/google/syzygy/tree/master/syzygy/zap_timestamp

这是谷歌syzygy工具链中的一个小公举（工具 O(∩_∩)O~）。

syzygy也是个好东西，可以改善软件的启动速度，体积较大的软件，本身启动已经没有什么优化空间时，可以考虑使用syzygy来提高加载速度