/
idem.py
executable file
·269 lines (258 loc) · 9.97 KB
/
idem.py
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#!/usr/bin/env python
#
# Copyright 2012, 2014 Matt Kenney
#
# This file is part of Feedsquish.
#
# Feedsquish is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option) any
# later version.
#
# Feedsquish is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
# details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Feedsquish. If not, see <http://www.gnu.org/licenses/>.
#
import cgi
import string
import redis.client
import passlib.context
import webob
import webob.exc
import filters
ctx = passlib.context.CryptContext(schemes=['pbkdf2_sha1', 'pbkdf2_sha512'])
_form_login = string.Template("""<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8" />
<meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport" />
<link href="/css/default.css" rel="stylesheet" type="text/css" />
<title>Sign In</title>
</head>
<body class="idem-body">
<form action="$action" method="post">
<div class="idem-message">$message</div>
<table class="idem-table">
<tr>
<td><label for="username">Username:</label></td>
<td><input id="username" name="idem.username" type="text" value="$username" /></td>
</tr>
<tr>
<td><label for="password">Password:</label></td>
<td><input id="password" name="idem.password" type="password" value="$password" /></td>
</tr>
<tr>
<td></td>
<td><input type="submit" value="Sign In" /></td>
</tr>
</table>
</form>
<form action="$action" method="post">
<div class="idem-switch">
<input name="idem.create" type="submit" value="Create an New Account" />
</div>
</form>
</body>
</html>
""")
_form_create = string.Template("""<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8" />
<meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport" />
<title>Create Account</title>
<link href="/css/default.css" rel="stylesheet" type="text/css" />
</head>
<body class="idem-body">
<form action="$action" method="post">
<input name="idem.create" type="hidden" value="" />
<div class="idem-message">$message</div>
<table class="idem-table">
<tr>
<td><label for="username">Username:</label></td>
<td><input id="username" name="idem.username" type="text" value="$username" /></td>
</tr>
<tr>
<td><label for="password1">Password:</label></td>
<td><input id="password1" name="idem.password1" type="password" value="$password1" /></td>
</tr>
<tr>
<td><label for="password2">Retype password:</label></td>
<td><input id="password2" name="idem.password2" type="password" value="$password2" /></td>
</tr>
<tr>
<td colspan="2">
<p>By clicking Create Account, you agree<br />
to our <a href="/policies/termsofuse.html" target="_blank">Terms of Use</a> and
<a href="/policies/privacy.html" target="_blank">Privacy Policy</a>.</p>
</td>
</tr>
<tr>
<td></td>
<td><input type="submit" value="Create Account" /></td>
</tr>
</table>
</form>
</form>
<form action="$action">
<div class="idem-switch">
<input type="submit" value="Sign In with Existing Account" />
</div>
</form>
</body>
</html>
""")
_form_change = string.Template("""<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8" />
<meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport" />
<title>Change Password</title>
<link href="/css/default.css" rel="stylesheet" type="text/css" />
</head>
<body class="idem-body">
<form action="$action" method="post">
<input name="idem.change" type="hidden" value="" />
<div class="idem-message">$message</div>
<table class="idem-table">
<tr>
<td><label for="password">Current password:</label></td>
<td><input id="password" name="idem.password" type="password" value="$password" /></td>
</tr>
<tr>
<td><label for="password1">New password:</label></td>
<td><input id="password1" name="idem.password1" type="password" value="$password1" /></td>
</tr>
<tr>
<td><label for="password2">Retype new password:</label></td>
<td><input id="password2" name="idem.password2" type="password" value="$password2" /></td>
</tr>
<tr>
<td></td>
<td><input type="submit" value="Change Password" /></td>
</tr>
</table>
</form>
</body>
</html>
""")
class Authenticator(object):
def __init__(self, application, config={}):
self.application = application
self.session_key = config.get("idem.session.key", "session")
self.user_key = config.get("idem.user.key", "REMOTE_USER")
self.redis = redis.client.StrictRedis()
self.dummy = ctx.encrypt("password")
self.auth_change_password = config.get("idem.auth_change_password", "/auth_change_password")
self.auth_logout = config.get("idem.auth_logout", "/auth_logout")
def _change_password(self, environ, start_response):
request = webob.Request(environ)
action = request.headers.get('X-Forwarded-Path', request.path)
message = ""
userid = environ["REMOTE_USER"]
password = request.params.get("idem.password", "")
password1 = request.params.get("idem.password1", "")
password2 = request.params.get("idem.password2", "")
if request.method != "POST":
pass
elif len(password1) < 6:
message = "Passwords must be at least 6 letters."
elif password1 != password2:
message = "Passwords do not match."
else:
passwd = self.redis.hget(userid, "password")
if passwd:
if ctx.verify(password, passwd):
self.redis.hset(userid, "password", ctx.encrypt(password1))
response = request.get_response(webob.exc.HTTPFound(location="/"))
return response(environ, start_response)
else:
ctx.verify(password, self.dummy)
message = "The current password you entered is incorrect."
response = webob.Response()
response.charset = "UTF-8"
response.text = unicode(_form_change.substitute(
action=cgi.escape(action, True),
message=cgi.escape(message, True),
password=cgi.escape(password, True),
password1=cgi.escape(password1, True),
password2=cgi.escape(password2, True)
))
return response(environ, start_response)
def _create_user(self, environ, start_response, request, session):
action = request.headers.get('X-Forwarded-Path', request.path)
username = request.params.get("idem.username", "")
password1 = request.params.get("idem.password1", "")
password2 = request.params.get("idem.password2", "")
message = ""
if request.params["idem.create"] != "":
pass # show blank form
elif len(username) < 4:
message = "Usernames must be at least 4 letters."
elif len(password1) < 6:
message = "Passwords must be at least 6 letters."
elif password1 != password2:
message = "Passwords do not match."
else:
userid = "user/" + filters.encode_segment(username)
if self.redis.hsetnx(userid, "password", ctx.encrypt(password1)):
session[self.user_key] = userid
response = request.get_response(webob.exc.HTTPFound(location=action))
return response(environ, start_response)
message = "Username already exists."
response = webob.Response()
response.charset = "UTF-8"
response.text = unicode(_form_create.substitute(
action=cgi.escape(action, True),
message=cgi.escape(message, True),
username=cgi.escape(username, True),
password1=cgi.escape(password1, True),
password2=cgi.escape(password2, True)
))
return response(environ, start_response)
def __call__(self, environ, start_response):
message = ""
session = environ.get(self.session_key)
userid = session.get(self.user_key)
if environ["PATH_INFO"] == self.auth_logout:
session[self.user_key] = None
message = "You have signed out."
elif userid:
environ["REMOTE_USER"] = userid
if environ["PATH_INFO"] == self.auth_change_password:
return self._change_password(environ, start_response)
else:
return self.application(environ, start_response)
request = webob.Request(environ)
action = request.headers.get('X-Forwarded-Path', request.path)
username = request.params.get("idem.username", "")
password = request.params.get("idem.password", "")
if environ["PATH_INFO"] == self.auth_logout:
action = "./"
if request.method == "POST":
if request.params.has_key("idem.create"):
return self._create_user(environ, start_response, request, session)
else:
userid = "user/" + filters.encode_segment(username)
passwd = self.redis.hget(userid, "password")
if passwd:
if ctx.verify(password, passwd):
session[self.user_key] = userid
response = request.get_response(webob.exc.HTTPFound(location=action))
return response(environ, start_response)
else:
ctx.verify(password, self.dummy)
message = "The username or password you entered is incorrect."
response = webob.Response()
response.charset = "UTF-8"
response.text = unicode(_form_login.substitute(
action=cgi.escape(action, True),
message=cgi.escape(message, True),
username=cgi.escape(username, True),
password=cgi.escape(password, True)
))
return response(environ, start_response)