本文实例讲述了python实现文件快照加密保护的方法。分享给大家供大家参考。具体如下：

这段代码可以对指定的目录进行扫描，包含子目录，对指定扩展名的文件进行SHA-1加密后存储在cvs文件，以防止文件被篡改

调用方法：python snapper.py > todayCheck.csv

# Hello, this is a script written in Python. See http://www.pyhon.org
#
# Snapper 1.2p
#
# This script will walk a directory (and its subdirectories) and compute
# SHA (Secure Hash Algorithm) for specific files (according to their
# extensions) and ouput a CSV file (suited for loading into a spreadsheet
# editor,a database or simply comparing with diff or ExamDiff.).
#
# You can redirect the output of this script to a file.
# eg. python snapper.py > todayCheck.csv
#
# This script can be usefull to check system files tampering.
#
# This script is public domain. Feel free to reuse it.
# The author is:
#    Sebastien SAUVAGE
#    
#    http://sebsauvage.net
#
# More quick & dirty scripts are available at http://sebsauvage.net/python/
#
# Directory to scan and extensions are hardcoded below:
directoryStart = r\'c:\\windows\'
extensionList=[\'.exe\',\'.dll\',\'.ini\',\'.ocx\',\'.cpl\',\'.vxd\',\'.drv\',\'.vbx\',\'.com\',\'.bat\',\'.src\',
        \'.sys\',\'.386\',\'.acm\',\'.ax\', \'.bpl\',\'.bin\',\'.cab\',\'.olb\',\'.mpd\',\'.pdr\',\'.jar\']
import os,string,sha,stat,sys
def snapper ( directoryStart , extensionList ) :
  os.path.walk( directoryStart, snapper_callback, extensionList )
def snapper_callback ( extensionList , directory, files ) :
  sys.stderr.write(\'Scanning \'+directory+\'\\n\')
  for fileName in files:
    if os.path.isfile( os.path.join(directory,fileName) ) :
      if string.lower(os.path.splitext(fileName)[1]) in extensionList :
        filelist.append(fileSHA ( os.path.join(directory,fileName) ))
def fileSHA ( filepath ) :
  sys.stderr.write(\' Reading \'+os.path.split(filepath)[1]+\'\\n\')
  file = open(filepath,\'rb\')
  digest = sha.new()
  data = file.read(65536)
  while len(data) != 0:
    digest.update(data)
    data = file.read(65536)
  file.close()
  return \'\"\'+filepath+\'\",\'+str(os.stat(filepath)[6])+\',\"\'+digest.hexdigest()+\'\"\'
sys.stderr.write(\'Snapper 1.1p - http://sebsauvage.net/python/\\n\')
filelist = []
snapper( directoryStart , extensionList )
sys.stderr.write(\'Sorting...\\n\')
filelist.sort()
filelist.insert(0, \'\"File path\",\"File size\",\"SHA\"\' )
sys.stderr.write(\'Printing...\\n\')
for line in filelist:
 print line
sys.stderr.write(\'All done.\\n\')

希望本文所述对大家的Python程序设计有所帮助。