Python基于hashlib模块的文件MD5一致性加密验证示例

 #python 检测文件MD5值 #python version 2.6 import hashlib import os,sys #简单的测试一个字符串的MD5值 def GetStrMd5(src): m0=hashlib.md5() m0.update(src) print m0.hexdigest() pass #大文件的MD5值 def GetFileMd5(filename): if not os.path.isfile(filename): return myhash = hashlib.md5() f = file(filename,'rb') while True: b = f.read(8096) if not b : break myhash.update(b) f.close() return myhash.hexdigest() def CalcSha1(filepath): with open(filepath,'rb') as f: sha1obj = hashlib.sha1() sha1obj.update(f.read()) hash = sha1obj.hexdigest() print(hash) return hash def CalcMD5(filepath): with open(filepath,'rb') as f: md5obj = hashlib.md5() md5obj.update(f.read()) hash = md5obj.hexdigest() print(hash) return hash if __name__ == "__main__": if len(sys.argv)==2 : hashfile = sys.argv[1] if not os.path.exists(hashfile): hashfile = os.path.join(os.path.dirname(__file__),hashfile) if not os.path.exists(hashfile): print("cannot found file") else CalcMD5(hashfile) else: CalcMD5(hashfile) #raw_input("pause") else: print("no filename")