本文實例講述了python實現文件快照加密保護的方法。分享給大家供大家參考。具體如下：

這段代碼可以對指定的目錄進行掃描，包含子目錄，對指定擴展名的文件進行SHA-1加密后存儲在cvs文件，以防止文件被篡改

調用方法：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')

希望本文所述對大家的Python程序設計有所幫助。

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