hashing sha512 password in Linux with python

mia_tech · 01-17-2016, 10:02 PM

I'm going through some python exercise, and according to the book using

Quote:

hashlib.sha512(password + salt).hexdigest()

you can create a password in the same format stored in shadow file; however, I enter my password, and use the same salt that shows my shadow file password, and the resulting hashing doesn't match. What I'm doing wrong? am I using the wrong salt? how does the system get the ascii for the salt? and does the salt goest in front or after when using hashlib.sha512(password + salt).hexdigest()
this is an example of the shadow file user password

Quote:

nagios:$6$P9zn0KwR$tgfvvFWJJ5FKmoXiP5rXWOjwoEBOEoAuBi3EphRbJqqjWYvhEM2wa67L9XgQ7W591FxUNklkDIQsk4kij uhE50:16632:0:99999:7:::

the salt is the field from the second $ to the next $. and the actual password is what follows. I used that hash when using hashlib.sha512(password + hash), but I get a different hash... thanks

teapottwo · 01-18-2016, 07:32 AM

I may be wrong but I believe its the number of iterations it performs to slow down the generation, a lot more than standard.

norobro · 01-18-2016, 01:25 PM

Try the following:

Code:

import crypt
print crypt.crypt("your_pw", "$6$P9zn0KwR")

From: https://docs.python.org/2/library/cr...t#module-crypt

Edit: A good discussion here - http://stackoverflow.com/q/21090312

mia_tech · 01-21-2016, 11:32 PM

Quote:

Originally Posted by norobro

Try the following:

Code:

import crypt
print crypt.crypt("your_pw", "$6$P9zn0KwR")

From: https://docs.python.org/2/library/cr...t#module-crypt

Edit: A good discussion here - http://stackoverflow.com/q/21090312

Thanks!... helped a lot