Are there any python modules to store passwords securely in .conf/.txt files?

Question

I am trying to read and write username and password in a secured manner. With my current implementation I am following AES-CBC encryption/decryption but storing the encrypted username the with random key in a config file is a security issue. I found an option that keystore is a better way of storing passwords. I have checked similar question but the information is not clear to me. Another option that I found is the keyring, it is working fine in windows but on Linux , I am getting following error. I have checked for the possible solutions but couldn't find one.

python keyring-test.py
Traceback (most recent call last):
  File "keyring-test.py", line 3, in <module>
    keyring.set_password(service_name="demo-service",username="admin",password="test")
  File "/usr/lib/python2.7/site-packages/keyring/core.py", line 64, in set_password
    _keyring_backend.set_password(service_name, username, password)
  File "/usr/lib/python2.7/site-packages/keyring/backends/fail.py", line 23, in get_password
    raise RuntimeError(msg)
RuntimeError: No recommended backend was available. Install the keyrings.alt package if you want to use the non-recommended backends. See README.rst for details.

Can someone suggest me any better solution or modules from python to store passwords securely?

Answer 1

My implementation whas this: I made a random string and store it to a txt file then encrypt its bytes file under a key! I use two function that i have made which the def encrypt_file takes a file encrypt their bytes and returns an encrypted file and def dencrypt_file does the opposite .

from Crypto.Cipher import AES
import hashlib
import os
import pathlib

def encrypt_file(key,filein,fileout=None,IV=None):
    modes = [1,2,8,3,6,9,11,12,10,5]
    if os.path.isfile(filein):
        if IV == None:
            IV = 16 * b'\x00'
        else:
            IV = IV.encode("utf-8")
        if len(IV)==16:
            if fileout == None:
                fileout_path = pathlib.Path(filein).parent
                fileout_name = pathlib.Path(filein).name
            else:
                fileout_path = pathlib.Path(fileout).parent
                fileout_name = pathlib.Path(fileout).name
                print (fileout_path, fileout_name )
                if os.path.exists(fileout_path) == False:
                    print("Path Does Not Exists")
                    return

            encryptor = AES.new(hashlib.sha256(key.encode("utf-8")).digest(), 3, IV=IV)
            with open(filein,"rb") as f :
                f = f.read()
                encr_bytes = encryptor.encrypt(f)
                file = open(str(fileout_path)+"\\"+str(fileout_name)+".enc","wb")
                file.write(encr_bytes)
                file.close()
                del encryptor
        else:
            print ("IV must 16 bytes long")
            return
    else:
        print("No file path")
        return




def dencrypt_file(key,filein,fileout=None,IV=None,TXT = False):
    if os.path.isfile(filein):
        if IV == None:
            IV = 16 * b'\x00'
        else:
            IV = IV.encode("utf-8")
        if len(IV)==16:
            if fileout == None:
                fileout_path = pathlib.Path(filein).parent
                fileout_name = pathlib.Path(filein).name
                list_name = fileout_name.split(".")
            else:
                fileout_path = pathlib.Path(fileout).parent
                fileout_name = pathlib.Path(fileout).name
                list_name =  fileout_name.split(".")
                if os.path.exists(fileout_path) == False:
                    print("Path Does Not Exists")
                    return
            file_name = list_name[0] + "." + list_name[1]
            if os.path.isfile(str(fileout_path)+"\\"+str(file_name)):
                file_name = list_name[0] + "new" +"." + list_name[1]
                print(file_name, "OK")
            else:
                file_name = file_name
            final_path = str(fileout_path) + "\\" +  file_name
            encryptor = AES.new(hashlib.sha256(key.encode("utf-8")).digest(), 3, IV=IV)
            with open(filein,"rb") as f :
                if TXT == False:
                    file = open(final_path,"wb")
                    file.write(encryptor.decrypt(f.read()))
                    file.close()
                else:
                    return encryptor.decrypt(f.read()).decode("utf-8")
        else:
            print ("IV must 16 bytes long")
            return
    else:
        print("No file path")
return 

The parameters are

• key : your secret key
• filein : the file that you want to encrypt
• fileout : the output file
• IV : the initialization Vector