How to use a python loop to iterate over hash multiple times?

Question

I have created a python loop that should be passing the output of the digest back into the msg portion of the digest command, however i am ending up with exact same has no matter how many times i run the loop

from __future__ import print_function;
import hmac;
import hashlib;
import base64;

mydigest = base64.b64encode(hmac.new(b"salt", msg="mymessage", digestmod=hashlib.sha256).digest()).decode();

for x in range(0, 10000):
  mydigest = base64.b64encode(hmac.new(b"salt", msg="(mydigest)", digestmod=hashlib.sha256).digest()).decode();
  print (mydigest);

Ilya V. Schurov · Accepted Answer · 2017-01-07 03:00:49Z

2

You probably want

mydigest = base64.b64encode(hmac.new(b"salt", msg=mydigest, digestmod=hashlib.sha256).digest()).decode();

There's no string interpolation in "ordinary" strings in Python (strings with interpolation — the so-called f-strings — recently appeared in Python 3.6), so "(mydigest)" is a fixed string that has nothing with variable mydigest.

answered Jan 7, 2017 at 3:00

Ilya V. Schurov

8,1974 gold badges51 silver badges83 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to use a python loop to iterate over hash multiple times?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related