逐行阅读.txt单词列表时，如何获取正确的哈希值？

Question

I'm trying to build a Python3.x script that reads a .txt wordlist and convert the word on every line to its hashed equivalent however when I execute this script it produces a wrong hash.

Hope you guys can help me figure out what I'm doing wrong here..

Output

Arguments passed to the program:
Namespace(inputHashType=['md5'], verbose=True, 
    wordlist=_io.TextIOWrapper name='C:\\Users\\Mikael\\Desktop\\wordlist.txt' mode='rt' encoding='utf-8')
Verbose is set to: True

correct hash:  b61a6d542f9036550ba9c401c80f00ef
Line 1:  PT: tests      As hash: a58c6e40436bbb090294218b7d758a15

Example of inputfile:

tests
tests1
tests2

Source Code

import argparse
import sys
from Crypto.Hash import MD5, SHA1, SHA224, SHA256, SHA384, SHA512


parser = argparse.ArgumentParser(description='Hash production')
parser.add_argument('-v', action='store_true', dest='verbose', default=False, help='Print attempts')
parser.add_argument('-t', nargs=1, dest='inputHashType', help='Hash type')
parser.add_argument('-d', nargs='?', dest='wordlist', type=argparse.FileType('rt', encoding='utf-8'), default=sys.stdin, help='Dictionary (as file)')
args =  parser.parse_args()

inputHashType = ''.join(map(str, args.inputHashType)) # Formats args list as string
inputHashType.lower()

if inputHashType == 'md5':
    htype = MD5.new()

try:
    if args.verbose:
        with args.wordlist as file:
            line = file.readline()
            cnt = 1
            while line:
                word = line.encode('utf-8').rstrip()
                hashed = htype.update(word)
                hashed = htype.hexdigest()
                print("Line {}:  PT: {}      As hash: {}".format(cnt, line.strip(), hashed))
                line = file.readline()
                cnt += 1
    else:
        break
except:
    print('Error')

Answer 1

The problem is that in the try block of your code, you're re-using the MD5 hash evaluator for each new line by the update() method. This does not calculate the hash value for that input string, but accumulates the input and evaluates the hash of accumulated strings up to that point.

It's easy to see this is what is happening by using md5sum :

$ echo -n 'tests' | md5sum
b61a6d542f9036550ba9c401c80f00ef  -    # Identical to your 1st output line
$ echo -n 'teststests' | md5sum         # This is what you're calculating
a58c6e40436bbb090294218b7d758a15  -    # Identical to your 2nd output line.

To evaluate the hash value for each new input, you'll need to re-initialize a new MD5 instance by calling the new() method.