I'm trying to create a 'check' system for a password generator that will advsie whether or not three of the same types of character family are found in a row in a generated password, i.e
If the password is
y8kpBD8zcZLKRSh1j7vwCMDQ5orR8VEP
it will find 'ZLK' etc
I first thought lowercase_repeat = re.compile("[a-z]{3}") would for example find three lowercase repeats, but I can't seem to understand how this works exactly.
The password generator is below:
import random
import re
generator = random.SystemRandom()
password_characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789!##$%^&*()'
password = ''.join(generator.choice(password_characters) for _ in range(32))
print password
If you just want to check for specific character sets; e.g: all uppercase, all lowercase, digit and non-alnum - you can create a non-capturing group for each set. For example:
import re
pattern = '(?:[a-z]{3}|[A-Z]{3}|\d{3}|[\x20-\x2F\x3A-\x40\x5B-\x60\x7B-\x7E]{3})'
password = 'y8kpBD8zcZLKRSh1j7vwCMDQ5orR8VEP!'
matches = re.search(pattern, password)
The variable matches returns None if there are no matches, indicating the password passes.
The pattern [\x20-\x2F\x3A-\x40\x5B-\x60\x7B-\x7E] is a (probably pretty gnarly) way to catch a set of all non-alnum ascii characters (hex codes). It represents the following set:
[space] ! " # $ % & ' ( ) * + , - . / : ; < = > ? # [ \ ] ^ _ ` { | } ~
I pulled it out of an old project, so YMMV. I'm sure there might be a more succinct way to express it - indeed, you might prefer to explicitly specify a set; e.g: [!?#] etc.
Quick sanity-check:
import re
def check_password(password):
pattern = '(?:[a-z]{3}|[A-Z]{3}|\d{3}|[\x20-\x2F\x3A-\x40\x5B-\x60\x7B-\x7E]{3})'
return re.search(pattern, password)
passwords = ['a', 'abc', 'ABC', 'aBc', '1bc', '123']
for password in passwords:
if check_password(password):
print 'password failed: ', password
else:
print 'password passed: ', password
Yields:
password passed: a
password failed: abc
password failed: ABC
password passed: aBc
password passed: 1bc
password failed: 123
Hope this helps :)
Related
I have a script for creating accounts that outputs the following:
creating user in XYZ: username: testing firstName: Bob lastName:Test email:auto999#nowhere.com password:gWY6*Pja&4
So, I need to create a python script that will store the username and password in a csv file.
I tried splitting this string by spaces and colons then indexing it, but this isn't working quite properly and could fail if the message is different. Does anyone have any idea how to do this?
Regex is almost always the answer to this type of issue:
import re
text = 'creating user in XYZ: username: testing firstName: Bob lastName:Test email:auto999#nowhere.com password:gWY6*Pja&4'
pattern = '.*username:\s*(\S+)\s*firstName:\s*(\S+)\s*lastName:\s*(\S+)\s*email:\s*(\S+)\s*password:\s*(\S+)'
values = re.findall(pattern, text)
print(values)
Output:
[('testing', 'Bob', 'Test', 'auto999#nowhere.com', 'gWY6*Pja&4')]
Regexr Pattern Explanation
I don't see the need for Regex here, a simple but robust parsing is enough:
def get_data(account: str, attribute: str) -> str:
data = ' '.join(account.split()).strip()
for k, v in {' :': ':', ' : ': ':', ': ': ':'}.items():
data = data.replace(k, v)
index1 = data.find(attribute)
index2 = data.find(' ', index1)
return data[index1 + len(attribute + ':'): len(account) if index2 == -1 else index2]
example of use:
acc = "username: testing firstName: Bob lastName:Test email:auto999#nowhere.com password:gWY6*Pja&4"
print(get_data(acc, 'username'))
print(get_data(acc, 'password'))
output:
testing
gWY6*Pja&4
As the generator is yours, you can control how the accounts are created and I personally think that Regex is not easy to maintain.
This approach works even adding extra spaces or changing the order of the attributes, e.g.:
acc = " username: testing firstName: Bob lastName :Test email:auto999#nowhere.com password : gWY6*Pja&4 "
acc = "firstName: Bob username: testing email:auto999#nowhere.com password:gWY6*Pja&4 lastName:Test "
I could not set the value for password symbols properly using Python. I am getting the below error.
File "password.py", line 2
def get_random_string(length=20, symbolgroups='"0123456789", "abcdefghijklmnopqrstuvwxyz", "!##$%^&*():<>"'/|}{[]`\"):
^
SyntaxError: invalid syntax
My code is below:
def get_random_string(length=20, symbolgroups='"0123456789", "abcdefghijklmnopqrstuvwxyz", "!##$%^&*():<>"'/|}{[]`\")
if length is None:
length = settings.PASSWORD_LENGTH
r = random.SystemRandom()
password = [r.choice(s) for s in symbolgroups]
r.shuffle(password)
password = password[:length]
length -= len(password)
symbols = ''.join(symbolgroups)
password.extend([r.choice(symbols) for _i in xrange(length)])
r.shuffle(password)
return ''.join(password)
In the first line I am trying to set all letter with special characters to symbol group to generate the password but in editor window its showing the error. Here I need to set all letter,numbers and special characters to symbolgroups variable.
Escape the " in your string literal.
"foo\"bar'baz"
'foo"bar\'baz'
"""foo"bar'baz"""
'''foo"bar'baz'''
I am using the Python-LDAP module and trying to make a query on the logged in user. The username will be passed into the query. When I simply type the username in as a string my results come out correctly.
But if I try to pass the (username) variable it returns
LDAPError - FILTER_ERROR: {'desc': u'Bad search filter'} I've tried a number of different combinations but continue to get the same error returned. Any insight here would be great!
Edited for Minimal, Complete, and Verifiable example:
import ldap
LDAP_SERVER = "ldap://myldapserver.domain.ad:389"
username = r"domain\serviceAccount"
password = "Password"
l = ldap.initialize(LDAP_SERVER)
def login(username, password):
try:
l.simple_bind_s(username, password)
base = "OU=Users,OU=Group,DC=domain,DC=ad"
criteria = "(&(objectClass=user)(sAMAccountName=anActualUsername))" #WORKS
criteria = '(&(objectClass=user)(sAMAccountName=%s))' % username #DOESNT WORK
criteria = "(&(objectClass=user)" + "(sAMAccountName=" + username + "))" #DOESNT WORK
attributes = ['displayName']
result = l.search_s(base, ldap.SCOPE_SUBTREE, criteria, attributes)
print result
except ldap.INVALID_CREDENTIALS:
return False
return True
login(username,password)
Did you try to encode your string ?
criteria = ('(&(objectClass=user)(sAMAccountName=%s))' % username).encode('utf8')
In the "WORKS" case, your filter string contains a simple name with no domain:
(&(objectClass=user)(sAMAccountName=bobsmith))
In the "DOESN'T WORK" case, you use a name with a domain:
(&(objectClass=user)(sAMAccountName=domain\serviceAccount)
The character \ is not allowed in a filter string unless it is escaped.
How to fix this depends upon the data present in your ldap server. Perhaps this:
criteria = '(&(objectClass=user)(sAMAccountName=%s))' % (
username if '\\' not in username else username.split('\\')[1])
Or perhaps this:
criteria = '(&(objectClass=user)(sAMAccountName=%s))' % (
ldap.filter.escape_filter_chars(username))
I needed to use ldap.filter.filter_format for proper character escaping.
import ldap.filter
criteria= ldap.filter.filter_format('(&(objectClass=user)(sAMAccountName=%s))', [username])
Try switching single quotes with double quotes.
criteria = "(&(objectClass=user)(sAMAccountName=anActualUsername))" #WORKS
criteria = '(&(objectClass=user)(sAMAccountName=%s))' % username #DOESNT WORK
the second criteria change it to this one (I didn't try with %s but only string):
criteria = "(&(objectClass=user)(sAMAccountName=%s))" % username #SHOULD WORK
I am using PRAW to make a reddit bot that takes the comment author of someone who says "alot" and stores their username into a list. I am having troubles with the regular expression and how to get the string to work. Here is my code.
#importing praw for reddit api and time to make intervals
import praw
import time
import re
username = "LewisTheRobot"
password =
r = praw.Reddit(user_agent = "Counts people who say alot")
word_to_match = ['\balot\b']
storage = []
r.login(username, password)
def run_bot():
subreddit = r.get_subreddit("test")
print("Grabbing subreddit")
comments = subreddit.get_comments(limit=200)
print("Grabbing comments")
for comment in comments:
comment_text = comment.body.lower()
isMatch = any(string in comment_text for string in word_to_match)
if comment.id not in storage and isMatch:
print("Match found! Storing username: " + str(comment.author) + " into list.")
storage.append(comment.author)
print("There are currently: " + str(len(storage)) + " people who use 'alot' instead of ' a lot'.")
while True:
run_bot()
time.sleep(5)
so the regular expression I am using looks for the word alot instead of alot as part of a string. Example zealot. Whenever I run this, it will not find a comment that I have made. Any suggestions?
You're checking with string operations, not RE ones, in
isMatch = any(string in comment_text for string in word_to_match)
The first in here checks for a substring -- nothing to do with REs.
Change this to
isMatch = any(re.search(string, comment_text) for string in word_to_match)
Moreover, you have an error in your initialization:
word_to_match = ['\balot\b']
'\b' is the character with code 0x08 (backspace). Always use raw string syntax for RE patterns, to avoid such traps:
word_to_match = [r'\balot\b']
Now you'll have a couple of characters, backslash then b, which RE will interpret to mean "word boundary".
There may be other bugs but I try not to look for more than two bugs per question...:-)
I am trying to write a login routine for a python script. In doing so, I find the need to pattern match the credentials on a whole word basis. I have attempted to RegEx this, but it is failing for reasons that are unclear to me, but I hope are obvious to someone here. The code and output:
import re
authentry = "testusertestpass"
username = "testuser"
password = "testpass"
combo = "r\'\\b"+username + password + "\\b\'"
testcred = re.search(combo, authentry)
print combo
print authentry
print testcred
r'\btestusertestpass\b'
testusertestpass
None
So my regex test appears, at least to me, to be properly formatted, and should be a direct match against the test string, but is not. Any ideas? Thanks so much for any insight!
try this: it may works.
import re
authentry = "testusertestpass with another text"
username = "testuser"
password = "testpass"
combo = username + password + r'\b'
testcred = re.search(combo, authentry)
print combo
print authentry
print testcred
output:
testusertestpass\b
testusertestpass with another text
<_sre.SRE_Match object at 0x1b8a030>