IZBI!!!1!!11

Dockerfile

@@ -11,6 +11,6 @@ RUN pip3 install -r /requirements.txt
 COPY ./run.sh /run.sh
 COPY ./app/ /app
 
-RUN mkdir /app/hosts.d/
+WORKDIR /app
 
 CMD ["/run.sh"]

LICENSE

@@ -1,18 +1,59 @@
-MIT License
+The izbi license 1.01
 
-Copyright (c) 2026 wiktr
+Permission is hereby granted, free of charge, to any student and/or
+graduate of Computer Science - Information Security Management 
+(pl. Informatyka - Zarządzanie Bezpieczeństwem Informacji "izbi")
+from AGH University of Krakow ("AGH"), to freely use, modify and
+redistribute the contents of this software, its source code
+and any associated documentation ("full software"). 
 
-Permission is hereby granted, free of charge, to any person obtaining a copy of this software and 
-associated documentation files (the "Software"), to deal in the Software without restriction, including 
-without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
-copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the 
-following conditions:
+Every file that is written in human-readable format, meant to be read 
+by humans and not used by the software itself (documentation, readme, etc.), 
+has to end with the word "izbi", separated from the rest of the 
+aforementioned file by a newline character.
 
-The above copyright notice and this permission notice shall be included in all copies or substantial 
-portions of the Software.
+Only other students and/or staff of AGH's Faculty of Computer Science 
+(pl. Wydział Informatyki Akademii Górniczo-Hutniczej "WI AGH"), 
+after being given the verbal (which may be revoked at any time by original authors) or written 
+permission from the author(s) of the full software may acquire the same rights 
+to the full software as the students of izbi, free of charge.
+The use of this license by people affiliated with WI AGH is permitted only if they
+know someone that attends and/or attended izbi.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT 
-LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO 
-EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 
-IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 
-USE OR OTHER DEALINGS IN THE SOFTWARE.
+Any other person, who is unrelated to WI AGH and wishes to use this software is allowed to, 
+but cannot publish for profit or modify any version of the full software 
+or parts of its source code, including (but not limited to) merging and/or sublicensing, 
+except where such modification is private and cannot be discovered or 
+traced through the Clearnet or Deep web, in which case it is explicitly permitted.
+
+Students of AGH's Faculty of Computer Science, Electronics and Telecommunications
+(pl. Wydział Informatyki, Elektroniki i Telekomunikacji "WIET")
+are not permitted to use and/or modify the full software.
+However if they want to use the full software or its parts 
+they need to give 1 (one) full can of beer from the brand "Romper",
+or any other beer stated in the beer.md file in which (if created),
+every author needs to name the brand and type of beer they want to be given.
+This beer must be given to every credited author of the full software, 
+even if parts of the software that the students of WIET used were not made by that person. 
+After supplying the author(s) with beer, WIET students are acquiring the 
+same rights as students of WI AGH.
+
+The only people that are not allowed to use the full software in
+any way, shape or form, including reading this license or any other file
+are any past, present and future deans of WIET.
+
+THE TEXT ABOVE HAS TO APPEAR IN ITS UNCHANGED FORM IN ANY COPIES
+AND/OR FORKS OF FULL SOFTWARE THAT WERE NOT CREATED BY THE ORIGINAL
+AUTHOR OF THE FULL SOFTWARE. THE ONLY PEOPLE WITH THE RIGHT TO 
+CHANGE THE LICENSE OF THE FULL SOFTWARE ARE THE AUTHORS 
+CREDITED IN THE HISTORY OF THE ORIGINAL REPOSITORY (OR SEPARATE 
+AUTHORS.md file).
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR 
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+izbi

README.md

@@ -1,3 +1,5 @@
 # IZBI DNS
 
 Dynamic DNS for `.izbi` domains.
+
+izbi

app/auth.py

@@ -1,402 +1,35 @@
-import sqlite3
-from os import urandom
+import db
 from hashlib import sha256
 
-def init_db(path: str) -> None:
-    with sqlite3.connect(path) as connection:
-        cursor = connection.cursor()
-        cursor.execute('''
-            CREATE TABLE IF NOT EXISTS Tokens (
-                TKHASH TEXT PRIMARY KEY NOT NULL,
-                USERID INTEGER NOT NULL,
-                NAME TEXT NOT NULL
-            )
-        ''')
-
-        cursor.execute('''
-            CREATE TABLE IF NOT EXISTS Domains (
-                DOMAIN TEXT PRIMARY KEY NOT NULL,
-                USERID INTEGER NOT NULL
-            )
-        ''')
-
-        cursor.execute('''
-            CREATE TABLE IF NOT EXISTS Users (
-                USERID INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
-                USERNAME TEXT NOT NULL UNIQUE,
-                PWHASH TEXT NOT NULL,
-                PWSALT TEXT NOT NULL,
-                EMAIL TEXT
-                IS_ADMIN INTEGER NOT NULL DEFAULT 0
-            )
-        ''')
-
-        connection.commit()
-        cursor.close()
-
+# Check if access token can update domain's ip
 def check_token_domain(db_path: str, token: str, domain: str) -> bool:
-    with sqlite3.connect(db_path) as connection:
-        cursor = connection.cursor()
+    userid = db.Token.get_user(db_path, token)
 
-        token_hash = sha256(token.encode('utf-8')).hexdigest()
+    domain = domain.strip()
 
-        cursor.execute('''
-            SELECT COUNT(*) FROM Tokens
-            JOIN Domains ON Tokens.userid = Domains.userid
-            WHERE tkhash = ?
-                AND domain = ?
-        ''', (token_hash, domain))
-
-    return cursor.fetchone()[0] == 1
+    return domain in db.User.get_domains(db_path, userid)
 
+# Verify user's passowrd for login. Return UserID on success, None on failure
 def user_login(db_path: str, username: str, password: str) -> int | None:
-    with sqlite3.connect(db_path) as connection:
-        cursor = connection.cursor()
-
-        cursor.execute('''
-            SELECT pwsalt FROM Users
-            WHERE username = ?
-        ''', (username,))
-
-        password_salt = cursor.fetchone()
-        if password_salt is None:
-            return None
-        password_salt = password_salt[0]
-
-        password_hash = sha256( (password_salt + password).encode('utf-8') ).hexdigest()
-
-        cursor.execute('''
-            SELECT userid FROM Users
-            WHERE username = ?
-                AND pwhash = ?
-        ''', (username, password_hash))
-
-        result = cursor.fetchone()
-        if result is None:
-            return None
-
-        return result[0]
-
-def get_username(db_path: str, userid: int) -> str | None:
-    with sqlite3.connect(db_path) as connection:
-        cursor = connection.cursor()
-
-        cursor.execute('''
-            SELECT username FROM Users
-            WHERE userid = ?
-        ''', (userid, ))
-
-        username = cursor.fetchone()
-        if username is None:
-            return None
-
-        return username[0]
-
-def get_user_domains(db_path: str, userid: int) -> list[str]:
-    with sqlite3.connect(db_path) as connection:
-        cursor = connection.cursor()
-
-        cursor.execute('''
-            SELECT domain FROM Domains
-            WHERE userid = ?
-        ''', (userid, ))
-
-        domains = cursor.fetchall()
-
-        domains = map(lambda x: x[0], domains)
-
-        return domains
-
-def get_user_tokens(db_path: str, userid: int) -> list[str]:
-    with sqlite3.connect(db_path) as connection:
-        cursor = connection.cursor()
-
-        cursor.execute('''
-            SELECT name FROM Tokens
-            WHERE userid = ?
-        ''', (userid, ))
-
-        tokens = cursor.fetchall()
-
-        tokens = map(lambda x: x[0], tokens)
-
-        return tokens
-
-def generate_user_token(db_path: str, userid: int, token_name: str) -> str | None:
-    with sqlite3.connect(db_path) as connection:
-        cursor = connection.cursor()
-
-        cursor.execute('''
-            SELECT COUNT(*) FROM Users
-            WHERE userid = ?
-        ''', (userid, ))
-
-        if cursor.fetchone()[0] != 1:
-            return None
-
-        cursor.execute('''
-            SELECT COUNT(*) FROM Tokens
-            WHERE userid = ?
-        ''', (userid, ))
-
-        if cursor.fetchone()[0] >= 5:
-            return None
-
-        cursor.execute('''
-            SELECT COUNT(*) FROM Tokens
-            WHERE userid = ?
-                AND name = ?
-        ''', (userid, token_name))
-
-        if cursor.fetchone()[0] != 0:
-            return None
-
-        if not token_name.isalnum():
-            return None
-
-        if len(token_name) >= 16:
-            return None
-
-        for _ in range(10):
-            try:
-                token = urandom(32).hex()
-                token_hash = sha256(token.encode("utf-8")).hexdigest()
-
-                cursor.execute('''
-                    INSERT INTO Tokens (tkhash, userid, name) VALUES (?, ?, ?)
-                ''', (token_hash, userid, token_name))
-
-                return token
-            except sqlite3.IntegrityError:
-                pass
-
+    try:
+        userid = db.User.get_id(db_path, username)
+    except ValueError:
         return None
 
+    pwsalt, pwhash = db.User.get_password_hash(db_path, userid)
 
-def revoke_user_token(db_path: str, userid: int, token_name: str) -> None:
-    with sqlite3.connect(db_path) as connection:
-        cursor = connection.cursor()
+    password_hash = sha256( (pwsalt + password).encode('utf-8')).hexdigest()
 
-        cursor.execute('''
-            DELETE FROM Tokens
-            WHERE userid = ?
-                AND name = ?
-        ''', (userid, token_name))
+    if pwhash == password_hash:
+        return userid
 
-def change_user_password(db_path: str, userid: int, oldpass: str, newpass: str) -> bool:
-    with sqlite3.connect(db_path) as connection:
-        cursor = connection.cursor()
+    return None
 
-        cursor.execute('''
-            SELECT COUNT(*) FROM Users
-            WHERE userid = ?
-        ''', (userid, ))
+# Change password of user (by user)
+def change_user_password(db_path: str, userid: int, oldpass: str, newpass: str) -> None:
+    username = db.User.get_username(db_path, userid)
 
-        if cursor.fetchone()[0] != 1:
-            return False
+    if user_login(db_path, username, oldpass) is None:
+        raise ValueError("Incorrect password")
 
-        cursor.execute('''
-            SELECT pwsalt FROM Users
-            WHERE userid = ?
-        ''', (userid, ))
-
-        salt = cursor.fetchone()
-        if salt is None:
-            return False
-        salt = salt[0]
-
-
-        oldpass_hash = sha256( (salt + oldpass).encode('utf-8')).hexdigest()
-
-        cursor.execute('''
-            SELECT COUNT(*) FROM Users
-            WHERE userid = ?
-                AND pwhash = ?
-        ''', (userid, oldpass_hash))
-
-        if cursor.fetchone()[0] != 1:
-            return False
-
-    return set_user_password(db_path, userid, newpass)
-
-def set_user_password(db_path: str, userid: int, newpass: str) -> bool:
-    with sqlite3.connect(db_path) as connection:
-        cursor = connection.cursor()
-
-        cursor.execute('''
-            SELECT COUNT(*) FROM Users
-            WHERE userid = ?
-        ''', (userid, ))
-
-        if cursor.fetchone()[0] != 1:
-            return False
-
-        salt = urandom(16).hex()
-        newpass_hash = sha256( (salt + newpass).encode('utf-8')).hexdigest()
-
-        cursor.execute('''
-            UPDATE Users
-            SET
-                pwsalt = ?,
-                pwhash = ?
-            WHERE userid = ?
-        ''', (salt, newpass_hash, userid))
-
-        return True
-
-def is_admin(db_path: str, userid: int) -> bool:
-    with sqlite3.connect(db_path) as connection:
-        cursor = connection.cursor()
-
-        cursor.execute('''
-            SELECT COUNT(*) FROM Users
-            WHERE userid = ?
-                AND IS_ADMIN = 1
-        ''', (userid, ))
-
-        return cursor.fetchone()[0] == 1
-
-def get_users(db_path: str) -> dict:
-    with sqlite3.connect(db_path) as connection:
-        cursor = connection.cursor()
-
-        cursor.execute('''
-            SELECT userid, username, is_admin, email FROM Users
-        ''')
-
-        users = cursor.fetchall()
-
-        users = list(map(lambda x: {"userid": x[0], "username": x[1], "domains": [], "email": x[3], "is_admin": bool(x[2])}, users))
-
-        for user in users:
-            cursor.execute('''
-                SELECT domain FROM Domains
-                WHERE userid = ?
-            ''', (user["userid"], ))
-
-            domains = cursor.fetchall()
-
-            domains = list(map(lambda x: x[0], domains))
-
-            user['domains'] = domains
-
-        return users
-
-def create_user(db_path: str, username: str, password: str, domains: list = [], is_admin: bool = False, email: str = None):
-    with sqlite3.connect(db_path) as connection:
-        cursor = connection.cursor()
-
-        username.strip()
-        email.strip()
-
-        cursor.execute('''
-            SELECT COUNT(*) FROM Users
-            WHERE username = ?
-        ''', (username, ))
-
-        if cursor.fetchone()[0] != 0:
-            return "Username exists"
-
-        if username == "":
-            return "Username is empty"
-
-        if not username.isalnum():
-            return "Username is not alphanumeric"
-
-        if password == "":
-            return "Password empty"
-
-        if len(password) < 8:
-            return "Password is shorter than 8 characters"
-
-        salt = urandom(16).hex()
-        password_hash = sha256( (salt + password).encode('utf-8')).hexdigest()
-
-        cursor.execute('''
-            INSERT INTO Users (username, pwsalt, pwhash, email, is_admin) VALUES (?, ?, ?, ?, ?)
-        ''', (username, salt, password_hash, email, is_admin))
-
-        cursor.execute('''
-            SELECT userid FROM Users
-            WHERE username = ?
-        ''', (username, ))
-
-        userid = cursor.fetchone()[0]
-
-        for domain in domains:
-            domain = domain.strip()
-
-            if domain == "":
-                continue
-
-            cursor.execute('''
-                SELECT COUNT(*) FROM Domains
-                WHERE domain = ?
-            ''', (domain, ))
-
-            if cursor.fetchone()[0] != 0:
-                continue
-
-            cursor.execute('''
-                INSERT INTO Domains (userid, domain) VALUES (?, ?)
-            ''', (userid, domain))
-
-def update_user(db_path: str, userid: int, domains: list[str] = None, password: str = None, is_admin: bool = None, email: str = None) -> tuple[bool, str]:
-    with sqlite3.connect(db_path) as connection:
-        cursor = connection.cursor()
-
-        cursor.execute('''
-            SELECT COUNT(*) FROM Users
-            WHERE userid = ?
-        ''', (userid, ))
-
-        if cursor.fetchone()[0] != 1:
-            return False, "Uerid not found"
-
-        if domains is not None:
-            # crude check if domains is iterable
-            for domain in domains:
-                break
-
-            cursor.execute('''
-                DELETE FROM Domains
-                WHERE userid = ?
-            ''', (userid, ))
-
-            for domain in domains:
-                cursor.execute('''
-                    INSERT INTO Domains (userid, domain) VALUES (?, ?)
-                ''', (userid, domain))
-
-        if password is not None:
-            set_user_password(db_path, userid, password)
-
-        if is_admin is not None:
-            cursor.execute('''
-                UPDATE Users
-                SET
-                    is_admin = ?
-                WHERE userid = ?
-            ''', (is_admin, userid))
-
-
-        if email is not None:
-            if email == "":
-                email = None
-
-            cursor.execute('''
-                UPDATE Users
-                SET
-                    email = ?
-                WHERE userid = ?
-            ''', (email, userid))
-
-
-
-def delete_user(db_path: str, userid: int):
-    with sqlite3.connect(db_path) as connection:
-        cursor = connection.cursor()
-
-        cursor.execute('DELETE FROM Domains WHERE userid = ?', (userid,))
-        cursor.execute('DELETE FROM Tokens WHERE userid = ?', (userid,))
-        cursor.execute('DELETE FROM Users WHERE userid = ?', (userid,))
+    db.User.set_password(db_path, userid, newpass)

app/db.py

@@ -0,0 +1,432 @@
+import sqlite3
+from os import urandom
+from hashlib import sha256
+
+# Initialize database
+def init(db_path: str) -> None:
+    with sqlite3.connect(db_path) as connection:
+        cursor = connection.cursor()
+
+        # Auth token table
+        cursor.execute('''
+            CREATE TABLE IF NOT EXISTS Tokens (
+                TKHASH TEXT PRIMARY KEY NOT NULL,
+                USERID INTEGER NOT NULL,
+                NAME TEXT NOT NULL
+            )
+        ''')
+
+        # Registered domains table
+        cursor.execute('''
+            CREATE TABLE IF NOT EXISTS Domains (
+                DOMAIN TEXT PRIMARY KEY NOT NULL,
+                USERID INTEGER NOT NULL
+            )
+        ''')
+
+        # Users table
+        cursor.execute('''
+            CREATE TABLE IF NOT EXISTS Users (
+                USERID INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                USERNAME TEXT NOT NULL UNIQUE,
+                PWHASH TEXT NOT NULL,
+                PWSALT TEXT NOT NULL,
+                EMAIL TEXT,
+                IS_ADMIN INTEGER NOT NULL DEFAULT 0
+            )
+        ''')
+
+        # Create a new admin if there are no accounts
+        cursor.execute('''
+            SELECT COUNT(*) FROM Users
+        ''')
+
+        if cursor.fetchone()[0] == 0:
+            username = "root"
+            password = urandom(8).hex()
+
+            User.new(db_path, username, password, is_admin=True)
+
+            print(f"No users detected, created new admin\nUser: {username}\nPass: {password}", flush=True)
+
+
+def list_users(db_path: str) -> list[dict]:
+    with sqlite3.connect(db_path) as connection:
+        cursor = connection.cursor()
+
+        cursor.execute('''
+            SELECT userid, username, is_admin, email FROM Users
+        ''')
+
+        users = cursor.fetchall()
+
+        users = list(map(lambda x: {"userid": x[0], "username": x[1], "domains": [], "email": x[3], "is_admin": x[2]}, users))
+
+        for user in users:
+            cursor.execute('''
+                SELECT domain FROM Domains
+                WHERE userid = ?
+            ''', (user["userid"], ))
+
+            domains = cursor.fetchall()
+
+            domains = list(map(lambda x: x[0], domains))
+
+            user['domains'] = domains
+
+        return users
+
+
+# Collection of getters and setters
+class User:
+    def exists(db_path: str, userid: int) -> bool:
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            cursor.execute('''
+                SELECT COUNT(*) FROM Users
+                WHERE userid = ?
+            ''', (userid, ))
+
+            return cursor.fetchone()[0] == 1
+
+
+    def new(db_path: str, username: str, password: str, domains: list = [], is_admin: bool = False, email: str = None) -> int:
+        username = username.strip()
+
+        if not username.isalnum():
+            raise ValueError("Username has to be alphanumeric")
+
+        if len(username) < 1:
+            raise ValueError("Username has to be at least 1 character long")
+
+        if len(password) > 16:
+            raise ValueError("Username has to be at most 16 characters long")
+
+        if len(password) < 8:
+            raise ValueError("Password has to be at least 8 characters long")
+
+        if len(password) > 128:
+            raise ValueError("Password has to be at most 128 characters long")
+
+        if email is not None:
+            email = email.strip()
+
+            if len(email) > 128:
+                raise ValueError("Email has to be at most 128 characters long, be reasonable")
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            pwsalt = urandom(16).hex()
+            pwhash = sha256( (pwsalt + password).encode('utf-8') ).hexdigest()
+
+            cursor.execute('''
+                INSERT INTO Users (username, pwsalt, pwhash, email, is_admin) VALUES (?, ?, ?, ?, ?)
+            ''', (username, pwsalt, pwhash, email, is_admin))
+
+            # Get new user's ID
+            cursor.execute('''
+                SELECT userid FROM Users
+                WHERE username = ?
+            ''', (username, ))
+
+            userid = cursor.fetchone()[0]
+
+        User.set_domains(db_path, userid, domains)
+
+        return userid
+
+
+    def delete(db_path: str, userid: int):
+        if not User.exists(db_path, userid):
+            raise ValueError(f"User {userid} does not exist")
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            cursor.execute('DELETE FROM Domains WHERE userid = ?', (userid, ))
+            cursor.execute('DELETE FROM Tokens WHERE userid = ?', (userid, ))
+            cursor.execute('DELETE FROM Users WHERE userid = ?', (userid, ))
+
+
+    def is_admin(db_path: str, userid: int) -> bool:
+        if not User.exists(db_path, userid):
+            raise ValueError(f"User {userid} does not exist")
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            cursor.execute('''
+                SELECT is_admin FROM Users
+                WHERE userid = ?
+            ''', (userid, ))
+
+            return cursor.fetchone()[0]
+
+    def set_admin(db_path: str, userid: int, is_admin: bool):
+        if not User.exists(db_path, userid):
+            raise ValueError(f"User {userid} does not exist")
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            cursor.execute('''
+                UPDATE Users
+                SET is_admin = ?
+                WHERE userid = ?
+            ''', (is_admin, userid))
+
+    def get_username(db_path: str, userid: int) -> str:
+        if not User.exists(db_path, userid):
+            raise ValueError(f"User {userid} does not exist")
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            cursor.execute('''
+                SELECT username FROM Users
+                WHERE userid = ?
+            ''', (userid, ))
+
+            return cursor.fetchone()[0]
+
+
+    def get_id(db_path: str, username: str) -> int:
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            cursor.execute('''
+                SELECT userid FROM Users
+                WHERE username = ?
+            ''', (username, ))
+
+            userid = cursor.fetchone()
+
+            if userid is None:
+                raise ValueError(f"User {username} does not exist")
+
+            return userid[0]
+
+    def get_domains(db_path: str, userid: int) -> list[str]:
+        if not User.exists(db_path, userid):
+            raise ValueError(f"User {userid} does not exist")
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            cursor.execute('''
+                SELECT domain FROM Domains
+                WHERE userid = ?
+            ''', (userid, ))
+
+            domains = cursor.fetchall()
+            domains = list(map(lambda x: x[0], domains))
+
+            return domains
+
+
+    def set_domains(db_path: str, userid: int, domains: list[str]) -> None:
+        if not User.exists(db_path, userid):
+            raise ValueError(f"User {userid} does not exist")
+
+        #TODO domain regex
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            cursor.execute('''
+                DELETE FROM Domains
+                WHERE userid = ?
+            ''', (userid, ))
+
+            for domain in domains:
+                domain = domain.strip()
+
+                if len(domain) < 1:
+                    continue
+
+                cursor.execute('''
+                    INSERT INTO Domains (domain, userid) VALUES (?, ?)
+                ''', (domain, userid))
+
+
+    def get_token_names(db_path: str, userid: int) -> list[str]:
+        if not User.exists(db_path, userid):
+            raise ValueError(f"User {userid} does not exist")
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            cursor.execute('''
+                SELECT name FROM Tokens
+                WHERE userid = ?
+            ''', (userid, ))
+
+            token_names = cursor.fetchall()
+            token_names = list(map(lambda x: x[0], token_names))
+
+            return token_names
+
+
+    def generate_token(db_path: str, userid: int, token_name: str) -> str | None:
+        if not User.exists(db_path, userid):
+            raise ValueError(f"User {userid} does not exist")
+
+        if len(token_name) < 1:
+            raise ValueError("Token name has to be at least 1 character long")
+
+        if len(token_name) > 16:
+            raise ValueError("Token name has to be at most 16 characters long")
+
+        if not token_name.isalnum():
+            raise ValueError("Token name has to be alphanumeric")
+
+        token_name_list = User.get_token_names(db_path, userid)
+
+        if len(token_name_list) >= 5:
+            raise ValueError("One user can have at most 5 tokens")
+
+        if token_name in token_name_list:
+            raise ValueError("Token name is not unique")
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            # Try 10 times in case of collisions
+            for _ in range(10):
+                token = urandom(32).hex()
+                token_hash = sha256(token.encode("utf-8")).hexdigest()
+
+                try:
+                    cursor.execute('''
+                        INSERT INTO Tokens (tkhash, userid, name) VALUES (?, ?, ?)
+                    ''', (token_hash, userid, token_name))
+                except sqlite3.IntegrityError:
+                    continue
+
+                return token
+
+            return None
+
+
+    def revoke_token(db_path: str, userid: int, token_name: str) -> None:
+        if not User.exists(db_path, userid):
+            raise ValueError(f"User {userid} does not exist")
+
+        if token_name not in User.get_token_names(db_path, userid):
+            raise ValueError("Token name not found")
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            cursor.execute('''
+                DELETE FROM Tokens
+                WHERE userid = ?
+                    AND name = ?
+            ''', (userid, token_name))
+
+
+    def get_password_hash(db_path: str, userid: int) -> tuple[str, str]:
+        if not User.exists(db_path, userid):
+            raise ValueError(f"User {userid} does not exist")
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            cursor.execute('''
+                SELECT pwsalt, pwhash FROM Users
+                WHERE userid = ?
+            ''', (userid, ))
+
+            return cursor.fetchone()
+
+
+    def set_password(db_path: str, userid: int, password: str) -> None:
+        if not User.exists(db_path, userid):
+            raise ValueError(f"User {userid} does not exist")
+
+        if len(password) < 8:
+            raise ValueError("Password has to be at least 8 characters long")
+
+        if len(password) > 128:
+            raise ValueError("Password has to be at most 128 characters long")
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            pwsalt = urandom(16).hex()
+            pwhash = sha256( (pwsalt + password).encode('utf-8') ).hexdigest()
+
+            cursor.execute('''
+                UPdATE Users
+                SET pwsalt = ?,
+                    pwhash = ?
+                WHERE userid = ?
+            ''', (pwsalt, pwhash, userid))
+
+    def get_email(db_path: str, userid: int) -> str:
+        if not User.exists(db_path, userid):
+            raise ValueError(f"User {userid} does not exist")
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            cursor.execute('''
+                SELECT email FROM Users
+                WHERE userid = ?
+            ''', (userid, ))
+
+            return cursor.fetchone()[0]
+
+    def set_email(db_path: str, userid: int, email: str | None) -> None:
+        if not User.exists(db_path, userid):
+            raise ValueError(f"User {userid} does not exist")
+
+        if email is not None:
+            email = email.strip()
+
+            if len(email) > 128:
+                raise ValueError("Email has to be at most 128 characters long, be reasonable")
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            cursor.execute('''
+                UPDATE Users
+                SET email = ?
+                WHERE userid = ?
+            ''', (email, userid, ))
+
+
+# Collection of getters
+class Token:
+    def exists(db_path: str, token: str) -> bool:
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            tkhash = sha256(token.encode('utf-8')).hexdigest()
+
+            cursor.execute('''
+                SELECT COUNT(*) FROM Tokens
+                WHERE tkhash = ?
+            ''', (tkhash, ))
+
+            return cursor.fetchone()[0] == 1
+
+
+    def get_user(db_path: str, token: str) -> int:
+        if not Token.exists(db_path, token):
+            raise ValueError("Token does not exist")
+
+        with sqlite3.connect(db_path) as connection:
+            cursor = connection.cursor()
+
+            tkhash = sha256(token.encode('utf-8')).hexdigest()
+
+            cursor.execute('''
+                SELECT userid FROM Tokens
+                WHERE tkhash = ?
+            ''', (tkhash, ))
+
+            return cursor.fetchone()[0]

app/main.py

@@ -1,25 +1,27 @@
 from flask import Flask, jsonify, request, render_template, redirect, session, flash
 import auth
+import db
 import re
+from os import environ, urandom
+from flask_wtf import FlaskForm
+from wtforms import StringField, PasswordField, BooleanField, EmailField, HiddenField
+from wtforms.validators import DataRequired
+from flask_wtf.csrf import CSRFProtect
 
-
-
-HOSTS_PATH = "/app/hosts.d/izbi"
-DB_PATH = "/app/sqlite.db"
-
-
+HOSTS_PATH = ( environ["HOSTS"] if "HOSTS" in environ else"/app/data/hosts.d/" ) + "/izbi"
+DB_PATH = environ["DB_PATH"] if "DB_PATH" in environ else "/app/data/sqlite.db"
 
 app = Flask(__name__)
 app.config["SESSION_PERMANENT"] = True
 app.config["SESSION_TYPE"] = "memcached"
 app.config["PERMANENT_SESSION_LIFETIME"] = 3600
+app.config["SECRET_KEY"] = environ["SECRET_KEY"] if "SECRET_KEY" in environ else urandom(32).hex()
 
-app.config["SECRET_KEY"] = "dsadasda"
+csrf = CSRFProtect(app)
 
 hosts = {}
 
-
-
+# Update hosts file
 def update_hosts(path: str, hosts: dict = {}) -> bool:
     try:
         hosts_str = ""
@@ -34,213 +36,304 @@ def update_hosts(path: str, hosts: dict = {}) -> bool:
         return False
 
 
-
+# check if string is a valid IP
 def validate_ip(ip: str) -> bool:
     exp = r"^((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])\.){3}(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])$"
     return re.search(exp, ip)
 
 
+class LoginForm(FlaskForm):
+    username = StringField('username', validators=[DataRequired()])
+    password = PasswordField('password', validators=[DataRequired()])
 
-@app.route('/', methods=["GET"])
-def homepage():
+# Serve homepage
+@app.route('/', methods=["GET", "POST"])
+def index():
     if session.get("USERID") is not None:
         return redirect("/dashboard")
-    return render_template("index.html")
+
+    login_form = LoginForm()
+
+    if login_form.validate_on_submit():
+        username = login_form.username.data
+        password = login_form.password.data
+
+        userid = auth.user_login(DB_PATH, username, password)
+
+        if userid is None:
+            flash("Invalid user or password")
+            return redirect("/")
+
+        session["USERID"] = userid
+
+        return redirect("/dashboard")
+
+    return render_template("index.html", login_form=login_form)
 
 
+class LogoutForm(FlaskForm):
+    pass
 
-@app.route('/login', methods=["POST"])
-def login():
-    if "user" not in request.form or "pass" not in request.form:
-        return redirect("/"), 400
+class GenerateTokenForm(FlaskForm):
+    token_name = StringField('token-name', validators=[DataRequired()])
 
-    if request.form["user"].strip() == "" or request.form["pass"].strip() == "":
-        return redirect("/"), 400
+class RevokeTokenForm(FlaskForm):
+    token_name = StringField('token-name', validators=[DataRequired()])
 
-    userid = auth.user_login(DB_PATH, request.form["user"], request.form["pass"])
-    if userid is None:
-        return redirect("/")
+class ChangePasswordForm(FlaskForm):
+    password = PasswordField('password', validators=[DataRequired()])
+    new_password = PasswordField('new-password', validators=[DataRequired()])
+    repeat_password = PasswordField('repeat-password', validators=[DataRequired()])
 
-    session["USERID"] = userid
-
-    return redirect("/dashboard", code=302)
-
-@app.route('/logout', methods=["GET"])
-def logout():
-    session.clear()
-    return redirect("/")
+class CreateUserForm(FlaskForm):
+    username = StringField('username', validators=[DataRequired()])
+    domains = StringField('domains')
+    password = PasswordField('password', validators=[DataRequired()])
+    is_admin = BooleanField('is-admin')
+    email = EmailField('email')
 
+class UpdateUserForm(FlaskForm): #TODO
+    pass
 
+class DeleteUserForm(FlaskForm):
+    userid = HiddenField('userid', validators=[DataRequired()])
 
+# Display dashboard for logged in users
 @app.route('/dashboard', methods=["GET"])
 def dashboard():
     if session.get("USERID") is None:
         return redirect("/")
+
+    logout_form = LogoutForm()
+    generate_token_form = GenerateTokenForm()
+    revoke_token_form = RevokeTokenForm()
+    change_password_form = ChangePasswordForm()
+
     userid = session.get("USERID")
-    username = auth.get_username(DB_PATH, userid)
-    domains = auth.get_user_domains(DB_PATH, userid)
-    tokens = auth.get_user_tokens(DB_PATH, userid)
 
-    if auth.is_admin(DB_PATH, userid):
-        users = auth.get_users(DB_PATH)
-        return render_template("dashboard.html", username=username, domains=domains, tokens=tokens, is_admin=True, users=users)
-    return render_template("dashboard.html", username=username, domains=domains, tokens=tokens, is_admin=False)
+    username = db.User.get_username(DB_PATH, userid)
+    domains = db.User.get_domains(DB_PATH, userid)
+    tokens = db.User.get_token_names(DB_PATH, userid)
+
+    # If user is admin, display additional options
+    if db.User.is_admin(DB_PATH, userid):
+        create_user_form = CreateUserForm()
+        update_user_form = UpdateUserForm()
+        delete_user_form = DeleteUserForm()
+
+        users = db.list_users(DB_PATH)
+
+        return render_template("dashboard.html",
+            logout_form=logout_form, generate_token_form=generate_token_form, revoke_token_form=revoke_token_form, change_password_form=change_password_form, create_user_form=create_user_form, update_user_form=update_user_form, delete_user_form=delete_user_form,
+            username=username, domains=domains, tokens=tokens, is_admin=True, users=users
+        )
+
+    return render_template("dashboard.html",
+        logout_form=logout_form, generate_token_form=generate_token_form, revoke_token_form=revoke_token_form, change_password_form=change_password_form,
+        username=username, domains=domains, tokens=tokens, is_admin=False
+    )
 
 
+# Log out by clearing session data
+@app.route('/logout', methods=["POST"])
+def logout():
+    logout_form = LogoutForm()
 
+    if logout_form.validate_on_submit():
+        session.clear()
+
+    return redirect("/")
+
+
+# Generate new access token with a name
 @app.route('/generate-token', methods=["POST"])
 def generate_token():
     if session.get("USERID") is None:
         return redirect("/")
 
-    if "token" not in request.form:
-        return redirect("/dashboard")
-    if request.form["token"].strip() == "":
-        return redirect("/dashboard")
+    generate_token_form = GenerateTokenForm()
 
-    token = auth.generate_user_token(DB_PATH, session.get("USERID"), request.form["token"])
+    if generate_token_form.validate_on_submit():
+        token_name = generate_token_form.token_name.data
+        try:
+            token = db.User.generate_token(DB_PATH, session.get("USERID"), token_name)
+        except ValueError as e:
+            flash(str(e))
+            token = None
 
-    if token is not None:
-        flash(token)
+        if token is not None:
+            flash(token)
 
     return redirect("/dashboard")
 
 
+# Revoke token by name
 @app.route('/revoke-token', methods=["POST"])
 def revoke_token():
     if session.get("USERID") is None:
         return redirect("/")
 
-    if "token" not in request.form:
-        return redirect("/dashboard")
-    if request.form["token"].strip() == "":
-        return redirect("/dashboard")
+    revoke_token_form = RevokeTokenForm()
 
-    auth.revoke_user_token(DB_PATH, session.get("USERID"), request.form["token"])
+    if revoke_token_form.validate_on_submit():
+        token_name = revoke_token_form.token_name.data
+        try:
+            db.User.revoke_token(DB_PATH, session.get("USERID"), token_name)
+        except ValueError as e:
+            flash(str(e))
 
     return redirect("/dashboard")
 
 
-@app.route('/create-user', methods=["POST"])
-def create_user():
-    if session.get("USERID") is None:
-        return redirect("/")
-    if not auth.is_admin(DB_PATH, session.get("USERID")):
-        return redirect("/dashboard")
-
-    if 'username' not in request.form or 'password' not in request.form:
-        return redirect("/dashboard")
-
-    username = request.form.get("username").strip()
-    password = request.form.get("password")
-
-    domains = request.form.get('domains')
-    if domains is None:
-        domains = []
-    else:
-        collapse_exp = re.compile(r'\s+')
-        domains = collapse_exp.sub(' ', domains.strip())
-        domains = domains.split(" ")
-
-    is_admin = request.form.get("is_admin") is not None
-
-    flash(auth.create_user(DB_PATH, username, password, domains, is_admin, request.form.get('email')))
-
-    return redirect("/dashboard")
-
-
-@app.route('/update-user', methods=["POST"])
-def update_user():
-    if session.get("USERID") is None:
-        return redirect("/")
-    if not auth.is_admin(DB_PATH, session.get("USERID")):
-        return redirect("/dashboard")
-
-    userid = request.form.get("userid")
-    if userid is None:
-        return redirect("/dashboard")
-    try:
-        userid = int(userid)
-    except ValueError:
-        return redirect("/dashboard")
-
-    domains = request.form.get('domains')
-
-    if domains is not None:
-        collapse_exp = re.compile(r'\s+')
-        domains = collapse_exp.sub(' ', domains.strip())
-        domains = domains.split(" ")
-
-    password = request.form.get("password")
-
-    is_admin = request.form.get("is_admin")
-    print(is_admin, flush=True)
-    if is_admin is not None:
-        is_admin = is_admin == "true"
-    print(is_admin, flush=True)
-
-    email = request.form.get("email")
-
-    auth.update_user(DB_PATH, userid, domains, password, is_admin, email)
-
-    return redirect("/dashboard")
-
-
-
-@app.route('/delete-user', methods=["POST"])
-def delete_user():
-    if session.get("USERID") is None:
-        return redirect("/")
-    if not auth.is_admin(DB_PATH, session.get("USERID")):
-        return redirect("/dashboard")
-
-    userid = request.form.get("userid")
-    if userid is None:
-        return redirect("/dashboard")
-    try:
-        userid = int(userid)
-    except ValueError:
-        return redirect("/dashboard")
-
-    auth.delete_user(DB_PATH, userid)
-
-    return redirect("/dashboard")
-
-
-
-
+# Change password (by user)
 @app.route('/change-password', methods=["POST"])
 def change_password():
     if session.get("USERID") is None:
         return redirect("/")
 
-    if "pass" not in request.form or "pass-new" not in request.form or "pass-rep" not in request.form:
-        flash("password change failed")
-        return reidrect("/dashboard")
-    if request.form["pass"] == "" or request.form["pass-new"] == "" or request.form["pass-rep"] == "":
-        flash("password change failed")
-        return redirect("/dashboard")
+    change_password_form = ChangePasswordForm()
 
-    oldpass = request.form["pass"]
-    newpass = request.form["pass-new"]
+    if change_password_form.validate_on_submit():
+        password = change_password_form.password.data
+        new_password = change_password_form.new_password.data
+        repeat_password = change_password_form.repeat_password.data
 
-    if newpass != request.form["pass-rep"]:
-        flash("passwords do not match")
-        return redirect("/dashboard")
+        if new_password != repeat_password:
+            flash("Passwords do not match")
+            return redirect("/dashboard")
 
-    if not auth.change_user_password(DB_PATH, session.get("USERID"), oldpass, newpass):
-        flash("password change failed")
-        return redirect("/dashboard")
+        try:
+            auth.change_user_password(DB_PATH, session.get("USERID"), password, new_password)
+        except ValueError as e:
+            flash(str(e))
+            return redirect("/dashboard")
+
+        flash("Password changed successfully")
 
-    flash("password changed successfully")
     return redirect("/dashboard")
 
+
+# Create new user (by admin)
+@app.route('/create-user', methods=["POST"])
+def create_user():
+    if session.get("USERID") is None:
+        return redirect("/")
+    if not db.User.is_admin(DB_PATH, session.get("USERID")):
+        return redirect("/dashboard")
+
+    create_user_form = CreateUserForm()
+
+    if create_user_form.validate_on_submit():
+        username = create_user_form.username.data.strip()
+        password = create_user_form.password.data
+
+        domains = create_user_form.domains.data
+        if domains is None:
+            domains = []
+        else:
+            # Collapse whitespaces
+            collapse_exp = re.compile(r'\s+')
+            domains = collapse_exp.sub(' ', domains.strip())
+            domains = domains.split(" ")
+
+        is_admin = create_user_form.is_admin.data
+
+        email = create_user_form.email.data
+        if email is not None:
+            if email == "":
+                email = None
+
+        try:
+            db.User.new(DB_PATH, username, password, domains, is_admin, email)
+        except ValueError as e:
+            flash(str(e))
+
+    return redirect("/dashboard")
+
+
+# Update user's field (by admin)
+@app.route('/update-user', methods=["POST"])
+def update_user():
+    if session.get("USERID") is None:
+        return redirect("/")
+    if not db.User.is_admin(DB_PATH, session.get("USERID")):
+        return redirect("/dashboard")
+
+    update_user_form = UpdateUserForm()
+
+    if not update_user_form.validate_on_submit():
+        return redirect("/dashboard")
+
+    userid = request.form.get("userid")
+    if userid is None:
+        flash("UserID not supplied")
+        return redirect("/dashboard")
+
+    if not db.User.exists(DB_PATH, userid):
+        flash("User does not exist")
+        return redirect("/dashboard")
+
+    domains = request.form.get('domains')
+    if domains is not None:
+        collapse_exp = re.compile(r'\s+')
+        domains = collapse_exp.sub(' ', domains.strip())
+        domains = domains.split(" ")
+        try:
+            db.User.set_domains(DB_PATH, userid, domains)
+        except ValueError as e:
+            flash(str(e))
+
+    password = request.form.get("password")
+    if password is not None:
+        try:
+            db.User.set_password(DB_PATH, userid, password)
+        except ValueError as e:
+            flash(str(e))
+
+    is_admin = request.form.get("is_admin")
+    if is_admin is not None:
+        is_admin = is_admin == "true"
+        db.User.set_admin(DB_PATH, userid, is_admin)
+
+    email = request.form.get("email")
+    if email is not None:
+        if email == "":
+            email = None
+        db.User.set_email(DB_PATH, userid, email)
+
+    return redirect("/dashboard")
+
+
+# Delete user (by admin)
+@app.route('/delete-user', methods=["POST"])
+def delete_user():
+    if session.get("USERID") is None:
+        return redirect("/")
+    if not db.User.is_admin(DB_PATH, session.get("USERID")):
+        return redirect("/dashboard")
+
+    delete_user_form = DeleteUserForm()
+
+    if delete_user_form.validate_on_submit():
+        userid = delete_user_form.userid.data
+
+        if not db.User.exists(DB_PATH, userid):
+            flash("User does not exst")
+            return redirect("/dashboard")
+
+        db.User.delete(DB_PATH, userid)
+
+    return redirect("/dashboard")
+
+
+
+# API health endpoint ???
 @app.route('/health', methods=["GET"])
 def health():
     return jsonify({"status": "healthy", "comment": ""})
 
 
-
+# API for updating domain's IP
 @app.route('/update', methods=["GET"])
 def update_addr():
     try:
@@ -250,10 +343,10 @@ def update_addr():
 
         if 'ip' not in request.args:
             ip = request.remote_addr
-        elif not validate_ip(request.args['ip']):
-            return jsonify({"status": "400", "code": "ip-error", "comment": "Invalid IP"}), 400
-        else:
+        elif validate_ip(request.args['ip']):
             ip = request.args['ip']
+        else:
+            return jsonify({"status": "400", "code": "ip-error", "comment": "Invalid IP"}), 400
 
         if 'token' not in request.args:
             return jsonify({"status": "400", "code": "token-error", "comment": "Missing or invalid token"}), 400
@@ -265,6 +358,7 @@ def update_addr():
 
         success = True
 
+        # Update hosts file if something changed
         if domain not in hosts or ip != hosts[domain]:
             hosts[domain] = ip
             success = update_hosts(HOSTS_PATH, hosts)
@@ -278,7 +372,6 @@ def update_addr():
         return jsonify({"status": "500", "code": "internal-server-error", "comment": "An error occurred while processing request"}), 500
 
 
-
 if __name__ == '__main__':
-    auth.init_db(DB_PATH)
-    app.run(host="0.0.0.0", port=8080, debug=True)
+    db.init(DB_PATH)
+    app.run(host="0.0.0.0", port=8080, debug=False)

app/templates/admin.html

@@ -7,11 +7,12 @@
 			<tr><th>Username</th><th>Domains</th><th>Password</th><th>Admin</th><th>Email</th><th>Delete</th></tr>
 			
 			<form method="POST" action="/create-user"><tr>
-				<td><input type="text" name="username" placeholder="*user name" required /></td>
-				<td><input type="text" name="domains" placeholder="space separated domains" /></td>
-				<td><input type="password" name="password" placeholder="*password" required /></td>
-				<td><input type="checkbox" name="is_admin" /></td>
-				<td><input type="email" name="email" placeholder="email" /></td>
+				{{ create_user_form.hidden_tag() }}
+				<td>{{ create_user_form.username(placeholder="*Username") }}</td>
+				<td>{{ create_user_form.domains(placeholder="Space separated domains") }}</td>
+				<td>{{ create_user_form.password(placeholder="*Password") }}</td>
+				<td>{{ create_user_form.is_admin() }}</td>
+				<td>{{ create_user_form.email(placeholder="Email") }}</td>
 				<td><button type="submit">Add</button></td>
 			</tr></form>
 
@@ -19,28 +20,33 @@
 			<tr>
 				<td>{{ user["username"] }}</td>
 				<td><form method="POST" action="/update-user">
+					{{ update_user_form.hidden_tag() }}
 					<input type="hidden" name="userid" value="{{ user["userid"] }}" />
 					<input type="text" name="domains" placeholder="space separated domains" value="{{ user["domains"] | join(' ') }}" />
 					<button type="submit">update domains</button>
 				</form></td>
 				<td><form method="POST" action="/update-user">
+					{{ update_user_form.hidden_tag() }}
 					<input type="hidden" name="userid" value="{{ user["userid"] }}" />
 					<input type="password" name="password" placeholder="*password" required />
 					<button type="submit">update password</button>
 				</form></td>
 				<td><form method="POST" action="/update-user">
+					{{ update_user_form.hidden_tag() }}
 					<input type="hidden" name="userid" value="{{ user["userid"] }}" />
 					<input type="hidden" name="is_admin" value="{% if user["is_admin"] %}false{% else %}true{% endif %}" />
 					<input type="checkbox" disabled {% if user["is_admin"] %}checked{% endif %} />
 					<button type="submit">toggle admin</button>
 				</form></td>
 				<td><form method="POST" action="/update-user">
+					{{ update_user_form.hidden_tag() }}
 					<input type="hidden" name="userid" value="{{ user["userid"] }}" />
-					<input type="email" name="email" placeholder="email" value="{{ user["email"] }}"/>
+					<input type="email" name="email" placeholder="email" value="{{ user["email"] if user["email"] }}"/>
 					<button type="submit">update email</button>
 				</form></td>
 				<td><form method="POST" action="/delete-user">
-					<input type="hidden" name="userid" value="{{ user["userid"] }}" />
+					{{ delete_user_form.csrf_token }}
+					{{ delete_user_form.userid(value=user["userid"]) }}
 					<button type="submit">Delete</button>
 				</form></td>
 			</tr>

app/templates/dashboard.html

@@ -4,7 +4,11 @@
 	<title>Dashboard - IZBI DNS</title>
 </head>
 <body>
-	<h2>Hello {{ username }} <a href="/logout">log&nbsp;out</a></h2>
+	<h2>Hello {{ username }}</h2>
+	<form method="POST" action="/logout">
+		{{ logout_form.hidden_tag() }}
+		<button type="submit">Log&nbsp;Out</button>
+	</form>
 
 {% with messages = get_flashed_messages()%}
 {% if messages%}
@@ -23,14 +27,16 @@
 
 	<p>Your tokens: 
 		<form method="POST" action="/generate-token">
-			<input type="text" name="token" placeholder="token name" />
-			<button type="submit">new&nbsp;token</button>
+			{{ generate_token_form.hidden_tag() }}
+			{{ generate_token_form.token_name(placeholder="Token Name") }}
+			<button type="submit">New&nbsp;Token</button>
 		</form>
 		<ul>{% for token in tokens %}
 			<li>
 				<form method="POST" action="/revoke-token">
-					<input type="text" name="token" readonly value="{{ token }}" />
-					<button type="submit">revoke</button>
+					{{ revoke_token_form.hidden_tag() }}
+					{{ revoke_token_form.token_name(placeholder="Token Name", readonly=True, value=token) }}
+					<button type="submit">Revoke</button>
 				</form>
 			</li>
 {% endfor %}
@@ -39,10 +45,11 @@
 
 	<p>Password change
 		<form method="POST" action="/change-password">
-			<input type="password" name="pass" placeholder="old password" /><br />
-			<input type="password" name="pass-new" placeholder="new password" /><br />
-			<input type="password" name="pass-rep" placeholder="repeat password" /><br />
-			<button type="submit">change password</button>
+			{{ change_password_form.hidden_tag() }}
+			{{ change_password_form.password(placeholder="Old Password") }}<br />
+			{{ change_password_form.new_password(placeholder="New Password") }}<br />
+			{{ change_password_form.repeat_password(placeholder="Repeat Password") }}<br />
+			<button type="submit">Change Password</button>
 		</form>
 	</p>{% if is_admin %}{% include 'admin.html' %}{% endif %}
 </body>

app/templates/index.html

@@ -6,9 +6,18 @@
 <body>
 	<p>Dynamic DNS service for <span style="font-family: monospace">.izbi</span> domains <span style="font-family: monospace">:3</span></p>
 
-	<form method="POST" action="/login">
-		<input type="text" name="user" placeholder="username" required autofocus /><br />
-		<input type="password" name="pass" placeholder="password" required /><br />
+{% with messages = get_flashed_messages()%}
+{% if messages%}
+{% for message in messages%}
+        <h3>{{message}}</h3>
+{%endfor%}
+{%endif%}
+{%endwith%}
+
+	<form method="POST" action="/">
+		{{ login_form.hidden_tag() }}
+		{{ login_form.username(placeholder="Username", autofocus=True) }}<br />
+		{{ login_form.password(placeholder="Password") }}<br />
 		<button type="submit">log in</button>
 	</form>
 </body>

docker-compose.yml

@@ -3,6 +3,12 @@ services:
     image: izbi-dns
     build: .
     restart: unless-stopped
+    environment:
+      - HOSTS_PATH=/app/data/hosts.d/
+      - DB_PATH=/app/data/sqlite.db
+      - SECRET_KEY=CHANGEME
     ports:
       - "127.0.0.1:8080:8080"
-      - "127.0.0.1:55:5353/udp"
+      - "53:5353/udp"
+    volumes:
+      - "./data/:/app/data/"

requirements.txt

@@ -1 +1,2 @@
 flask
+Flask-WTF

run.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
 
-/usr/sbin/dnsmasq -d --hostsdir /app/hosts.d/ -p 5353 &
+mkdir -p "$HOSTS_PATH"
+
+/usr/sbin/dnsmasq -d --hostsdir "$HOSTS_PATH" -p 5353 &
 
 /usr/local/bin/python3 /app/main.py &