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