Python: MD5/SHA Signature Class

Problem Statement:

Get a class to use it for calculatin signatures of file.

Solution Code:

class Hashes:

'''

Helps in retruning the foloowing signatures of a file:

md5()

sha1()

sha256()

sha512()

'''

def __init__(self, filepath):

self._filepath = filepath

def md5(self):

import md5

try:

fileobj = file(self._filepath, 'rb')

except Exception,msg:

raise

return md5.new(fileobj.read()).hexdigest()

def sha1(self):

import sha

try:

fileobj = file(self._filepath, 'rb')

except Exception,msg:

raise

return sha.new(fileobj.read()).hexdigest()

def sha512(self):

import hashlib

try:

fileobj = file(self._filepath, 'rb')

except Exception,msg:

raise

(hashlib.sha512()).update(fileobj.read())

return (hashlib.sha512()).hexdigest()

def sha256(self):

import hashlib

try:

fileobj = file(self._filepath, 'rb')

except Exception,msg:

raise

(hashlib.sha256()).update(fileobj.read())

return (hashlib.sha256()).hexdigest()

hash = Hashes("C:\\Windows\\system32\\notepad.exe")

hash.sha1()