fix: associate challenges with usernames

Integration testing using Nighwatch (firefox + chromium)

Cargo.lock

@@ -873,6 +873,7 @@ dependencies = [
  "serde_json",
  "thiserror",
  "url",
+ "uuid",
 ]
 
 [[package]]
@@ -3392,6 +3393,16 @@ version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09cc8ee72d2a9becf2f2febe0205bbed8fc6615b7cb429ad062dc7b7ddd036a9"
 
+[[package]]
+name = "uuid"
+version = "1.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "345444e32442451b267fc254ae85a209c64be56d2890e601a0c37ff0c3c5ecd2"
+dependencies = [
+ "getrandom",
+ "serde 1.0.143",
+]
+
 [[package]]
 name = "validator"
 version = "0.15.0"

README.md

@@ -32,11 +32,11 @@ yourself!](https://demo.mcaptcha.org/widget/?sitekey=pHy0AktWyOKuxZDzFfoaewncWec
 
 ## How does it work?
 
-mCaptcha uses SHA256 based proof-of-work(PoW) to rate limit users.
+mCaptcha uses SHA256 based proof-of-work (PoW) to rate limit users.
 
-When a user wants to do something on an mCaptcha-protected website,
+When a user wants to do something on a mCaptcha-protected website,
 
-1. they will have to generate proof-of-work(a bunch of math that will takes
+1. they will have to generate proof-of-work (a bunch of math that will takes
    time to compute) and submit it to mCaptcha.
 
 2. We'll validate the proof:
@@ -54,8 +54,8 @@ When a user wants to do something on an mCaptcha-protected website,
 The whole process is automated from the user's POV. All they have to do
 is click on a button to initiate the process.
 
-mCaptcha makes interacting with websites (computationally)expensive for
+mCaptcha makes interacting with websites (computationally) expensive for
-the user. A well-behaving user will experience a slight delay(no delay
+the user. A well-behaving user will experience a slight delay (no delay
 when under moderate load to 2s when under attack; PoW difficulty is
 variable) but if someone wants to hammer your site, they will have to do
 more work to send requests than your server will have to do to respond
@@ -68,7 +68,7 @@ to their request.
 -   [x] **No tracking:** Our CAPTCHA routes are cookie free!
 -   [x] **IP address independent:** your users are behind a NAT? We got you covered!
 -   [x] **Resistant to replay attacks:** proof-of-work configurations have
-        short lifetimes(30s) and can be used only once. If a user submits a
+        short lifetimes (30s) and can be used only once. If a user submits a
         PoW to an already used configuration or an expired one, their proof
         will be rejected.
 
@@ -95,7 +95,7 @@ monitor console and network activity.
 > demo servers might be a few versions behind `master`. Please check footer for
 > build commit.
 
-Feel free to provide bogus information while signing up(project under
+Feel free to provide bogus information while signing up (project under
 development, database frequently wiped).
 
 ### Self-hosted:

db/db-core/Cargo.toml

@@ -15,6 +15,7 @@ serde = { version = "1", features = ["derive"]}
 url = { version  = "2.2.2", features = ["serde"] }
 #libmcaptcha = {  version = "0.2.2", git = "https://github.com/mCaptcha/libmcaptcha", features = ["minimal"], default-features = false, tag = "0.2.2"}
 libmcaptcha = { branch = "master", git = "https://github.com/mCaptcha/libmcaptcha", features = ["full"] }
+uuid = { version = "1.3.3", features = ["v4", "serde"] }
 
 [features]
 default = []

db/db-core/src/lib.rs

@@ -31,7 +31,10 @@
 //! - [errors](crate::auth): error data structures used in this crate
 //! - [ops](crate::ops): meta operations like connection pool creation, migrations and getting
 //! connection from pool
+use std::str::FromStr;
+
 use serde::{Deserialize, Serialize};
+use uuid::Uuid;
 
 pub use libmcaptcha::defense::Level;
 
@@ -97,6 +100,73 @@ pub struct NameHash {
     pub hash: String,
 }
 
+#[derive(Clone, Debug, Deserialize, Serialize, PartialEq)]
+/// Email challenge reason
+pub enum ChallengeReason {
+    /// challenge created to verify a newly registered user
+    EmailVerification,
+    /// Challenge created to verify a password reset request
+    PasswordReset,
+}
+
+impl ChallengeReason {
+    pub fn to_str(&self) -> &'static str {
+        match self {
+            Self::EmailVerification => "email_verification",
+            Self::PasswordReset => "password_resset",
+        }
+    }
+}
+
+impl ToString for ChallengeReason {
+    fn to_string(&self) -> String {
+        self.to_str().into()
+    }
+}
+
+impl FromStr for ChallengeReason {
+    type Err = ();
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        for reason in [Self::PasswordReset, Self::EmailVerification].iter() {
+            if s == reason.to_str() {
+                return Ok(reason.clone());
+            }
+        }
+        Err(())
+    }
+}
+
+#[derive(Clone, Debug, Deserialize, Serialize, PartialEq)]
+/// Minimal user representation for use in challenge verification
+pub struct ChallengeUser {
+    /// username of the user
+    pub username: String,
+    /// email ID of the user
+    pub email: String,
+}
+
+#[derive(Clone, Debug, Deserialize, Serialize, PartialEq)]
+/// Email challenge
+pub struct Challenge {
+    /// challenge unique identifier
+    pub challenge: Uuid,
+    /// reason why the challenge was create
+    pub reason: ChallengeReason,
+}
+
+impl Challenge {
+    /// create new Challenge instance for a given reason. Challenge text is auto-generated
+    pub fn new(reason: ChallengeReason) -> Self {
+        let challenge = Uuid::new_v4();
+        Self { challenge, reason }
+    }
+
+    /// Generate new ID (useful when ID clashes)
+    pub fn new_id(&mut self) {
+        self.challenge = Uuid::new_v4();
+    }
+}
+
 #[async_trait]
 /// mCaptcha's database requirements. To implement support for $Database, kindly implement this
 /// trait.
@@ -250,6 +320,19 @@ pub trait MCDatabase: std::marker::Send + std::marker::Sync + CloneSPDatabase {
 
     /// fetch PoWConfig confirms
     async fn fetch_confirm(&self, user: &str, key: &str) -> DBResult<Vec<i64>>;
+
+    /// Record challenge in database
+    async fn new_challenge(&self, user: &str, challenge: &mut Challenge)
+        -> DBResult<()>;
+
+    /// Record challenge in database
+    async fn fetch_challenge_user(
+        &self,
+        challenge: &Challenge,
+    ) -> DBResult<ChallengeUser>;
+
+    /// Delete a challenge from database
+    async fn delete_challenge(&self, challenge: &Challenge) -> DBResult<()>;
 }
 
 #[derive(Debug, Clone, Default, Deserialize, Serialize, PartialEq)]

db/db-core/src/tests.rs

@@ -295,4 +295,13 @@ pub async fn database_works<'a, T: MCDatabase>(
     // delete captcha; updated key = p.username so invoke delete with it
     db.delete_captcha(p.username, p.username).await.unwrap();
     assert!(!db.captcha_exists(Some(p.username), c.key).await.unwrap());
+
+    let mut challenge = Challenge::new(ChallengeReason::PasswordReset);
+    db.new_challenge(p.username, &mut challenge).await.unwrap();
+    db.new_challenge(p.username, &mut challenge).await.unwrap();
+    let c = db.fetch_challenge_user(&challenge).await.unwrap();
+    assert_eq!(c.username, p.username);
+    assert_eq!(&c.email, p.email.as_ref().unwrap());
+    db.delete_challenge(&challenge).await.unwrap();
+    assert!(db.fetch_challenge_user(&challenge).await.is_err())
 }

db/db-sqlx-maria/migrations/20230610113728_mcaptcha_challenge.sql

@@ -0,0 +1,27 @@
+CREATE TABLE IF NOT EXISTS mcaptcha_challenge_reason (
+	id INT auto_increment,
+	PRIMARY KEY(id),
+	name VARCHAR(40) NOT NULL UNIQUE
+);
+
+CREATE TABLE IF NOT EXISTS mcaptcha_challenge (
+	id INT auto_increment,
+	PRIMARY KEY(id),
+	reason INT NOT NULL,
+	challenge_id varchar(40) NOT NULL UNIQUE,
+	received timestamp NOT NULL DEFAULT now(),
+	user_id INT NOT NULL,
+
+	CONSTRAINT `fk_mcaptcha_challenge_user`
+		FOREIGN KEY (user_id)
+		REFERENCES mcaptcha_users (ID)
+		ON DELETE CASCADE
+		ON UPDATE CASCADE,
+
+	CONSTRAINT `fk_mcaptcha_mcaptcha_challenge_reason`
+		FOREIGN KEY (reason)
+		REFERENCES mcaptcha_challenge_reason (id)
+		ON DELETE CASCADE
+		ON UPDATE CASCADE
+
+);

db/db-sqlx-maria/sqlx-data.json

@@ -1,5 +1,53 @@
 {
   "db": "MySQL",
+  "04e79a67bc8c1b18eca95fc4d2602ed5dd41b6d864796f034540efec3da05fa8": {
+    "describe": {
+      "columns": [],
+      "nullable": [],
+      "parameters": {
+        "Right": 1
+      }
+    },
+    "query": "INSERT IGNORE INTO\n                    mcaptcha_challenge_reason (name)\n                VALUES (?)"
+  },
+  "12a7d765fb683c8134d032563f2d101e2fd70c261e71696e7a90387507e0ef43": {
+    "describe": {
+      "columns": [
+        {
+          "name": "name",
+          "ordinal": 0,
+          "type_info": {
+            "char_set": 224,
+            "flags": {
+              "bits": 4101
+            },
+            "max_size": 400,
+            "type": "VarString"
+          }
+        },
+        {
+          "name": "email",
+          "ordinal": 1,
+          "type_info": {
+            "char_set": 224,
+            "flags": {
+              "bits": 4
+            },
+            "max_size": 400,
+            "type": "VarString"
+          }
+        }
+      ],
+      "nullable": [
+        false,
+        true
+      ],
+      "parameters": {
+        "Right": 2
+      }
+    },
+    "query": "SELECT name, email\n            FROM mcaptcha_users\n            WHERE ID = (SELECT user_id \n                        FROM mcaptcha_challenge\n                        WHERE\n                            challenge_id = ?\n                        AND reason = (\n                            SELECT id FROM mcaptcha_challenge_reason WHERE name = ?\n                        )\n               );"
+  },
   "1367dceb151a766a901b5dd771d0b75d0bc61d2fef17a94a90c8ffa0065e2c44": {
     "describe": {
       "columns": [
@@ -247,6 +295,16 @@
     },
     "query": "SELECT difficulty_factor, visitor_threshold FROM mcaptcha_levels  WHERE\n            config_id = (\n                SELECT config_id FROM mcaptcha_config where captcha_key= (?)\n                ) ORDER BY difficulty_factor ASC;"
   },
+  "740ed2dab8c07c718c1b0e8e4262251bbf2501cdebfc4872fb903f70ec3d0dc8": {
+    "describe": {
+      "columns": [],
+      "nullable": [],
+      "parameters": {
+        "Right": 4
+      }
+    },
+    "query": "INSERT INTO mcaptcha_challenge (challenge_id, received, reason, user_id)\n                VALUES (?, ?,\n                    (SELECT id FROM mcaptcha_challenge_reason WHERE name = ?),\n                    (SELECT id FROM mcaptcha_users WHERE name = ?)\n                    );\n                "
+  },
   "74d68a86f852d3d85957e94ed04e8acd8e6144744f7b13e383ebcb2bcf3360ae": {
     "describe": {
       "columns": [],
@@ -873,6 +931,16 @@
     },
     "query": "SELECT name, password  FROM mcaptcha_users WHERE email = ?"
   },
+  "f47c05c0a7da41a2176f08a44c6c945dabb84558a4d09369b6108bfce8b9d2bf": {
+    "describe": {
+      "columns": [],
+      "nullable": [],
+      "parameters": {
+        "Right": 2
+      }
+    },
+    "query": "DELETE\n                FROM mcaptcha_challenge\n            WHERE\n                challenge_id = ?\n            AND reason = (SELECT id FROM mcaptcha_challenge_reason WHERE name = ?);"
+  },
   "fc717ff0827ccfaa1cc61a71cc7f71c348ebb03d35895c54b011c03121ad2385": {
     "describe": {
       "columns": [],

db/db-sqlx-maria/src/lib.rs

@@ -95,6 +95,22 @@ impl Migrate for Database {
             .run(&self.pool)
             .await
             .map_err(|e| DBError::DBError(Box::new(e)))?;
+
+        for reason in [
+            ChallengeReason::EmailVerification,
+            ChallengeReason::PasswordReset,
+        ] {
+            sqlx::query!(
+                "INSERT IGNORE INTO
+                    mcaptcha_challenge_reason (name)
+                VALUES (?)",
+                reason.to_str()
+            )
+            .execute(&self.pool)
+            .await
+            .map_err(|e| DBError::DBError(Box::new(e)))?;
+        }
+
         Ok(())
     }
 }
@@ -895,6 +911,93 @@ impl MCDatabase for Database {
 
         Ok(Date::dates_to_unix(records))
     }
+
+    /// Record challenge in database
+    async fn new_challenge(
+        &self,
+        user: &str,
+        challenge: &mut Challenge,
+    ) -> DBResult<()> {
+        let now = now_unix_time_stamp();
+        loop {
+            let res = sqlx::query!(
+                "INSERT INTO mcaptcha_challenge (challenge_id, received, reason, user_id)
+                VALUES (?, ?,
+                    (SELECT id FROM mcaptcha_challenge_reason WHERE name = ?),
+                    (SELECT id FROM mcaptcha_users WHERE name = ?)
+                    );
+                ",
+                &challenge.challenge.to_string(),
+                now,
+                challenge.reason.to_str(),
+                user
+            )
+            .execute(&self.pool)
+            .await;
+            if let Err(Error::Database(err)) = res {
+                use std::borrow::Cow;
+
+                if err.code() == Some(Cow::from("23505")) {
+                    let msg = err.message();
+                    if msg.contains("for key 'challenge_id'") {
+                        challenge.new_id();
+                        continue;
+                    }
+                }
+            }
+            break;
+        }
+        Ok(())
+    }
+
+    /// Record challenge in database
+    async fn fetch_challenge_user(
+        &self,
+        challenge: &Challenge,
+    ) -> DBResult<ChallengeUser> {
+        struct C {
+            name: String,
+            email: Option<String>,
+        }
+        let res = sqlx::query_as!(
+            C,
+            "SELECT name, email
+            FROM mcaptcha_users
+            WHERE ID = (SELECT user_id 
+                        FROM mcaptcha_challenge
+                        WHERE
+                            challenge_id = ?
+                        AND reason = (
+                            SELECT id FROM mcaptcha_challenge_reason WHERE name = ?
+                        )
+               );",
+            &challenge.challenge.to_string(),
+            challenge.reason.to_str(),
+        )
+        .fetch_one(&self.pool)
+        .await
+        .map_err(map_register_err)?;
+        Ok(ChallengeUser {
+            username: res.name,
+            email: res.email.unwrap(),
+        })
+    }
+
+    /// Delete a challenge from database
+    async fn delete_challenge(&self, challenge: &Challenge) -> DBResult<()> {
+        let _ = sqlx::query!(
+            "DELETE
+                FROM mcaptcha_challenge
+            WHERE
+                challenge_id = ?
+            AND reason = (SELECT id FROM mcaptcha_challenge_reason WHERE name = ?);",
+            &challenge.challenge.to_string(),
+            challenge.reason.to_str(),
+        )
+        .execute(&self.pool)
+        .await;
+        Ok(())
+    }
 }
 
 #[derive(Clone)]

db/db-sqlx-postgres/migrations/20230610105810_mcaptcha_challenge.sql

@@ -0,0 +1,12 @@
+CREATE TABLE IF NOT EXISTS mcaptcha_challenge_reason (
+	id SERIAL PRIMARY KEY NOT NULL,
+	name VARCHAR(40) NOT NULL UNIQUE
+);
+
+CREATE TABLE IF NOT EXISTS mcaptcha_challenge (
+	id SERIAL PRIMARY KEY NOT NULL,
+	reason INTEGER NOT NULL references mcaptcha_challenge_reason(ID) ON DELETE CASCADE,
+	user_id INTEGER NOT NULL references mcaptcha_users(ID) ON DELETE CASCADE,
+	challenge_id varchar(40) NOT NULL UNIQUE,
+	received timestamptz NOT NULL DEFAULT now()
+);

db/db-sqlx-postgres/sqlx-data.json

@@ -81,6 +81,33 @@
     },
     "query": "DELETE FROM mcaptcha_sitekey_user_provided_avg_traffic\n        WHERE config_id = (\n            SELECT config_id \n            FROM \n                mcaptcha_config \n            WHERE\n                key = ($1) \n            AND \n                user_id = (SELECT ID FROM mcaptcha_users WHERE name = $2)\n            );"
   },
+  "0fe29ca10e9a83f2064b1b98f570161d339891a74c637077b94d138a4360340e": {
+    "describe": {
+      "columns": [
+        {
+          "name": "email",
+          "ordinal": 0,
+          "type_info": "Varchar"
+        },
+        {
+          "name": "name",
+          "ordinal": 1,
+          "type_info": "Varchar"
+        }
+      ],
+      "nullable": [
+        true,
+        false
+      ],
+      "parameters": {
+        "Left": [
+          "Text",
+          "Text"
+        ]
+      }
+    },
+    "query": "SELECT\n                email, name\n            FROM\n                mcaptcha_users\n            WHERE\n                ID = (\n                    SELECT\n                        user_id\n                    FROM\n                        mcaptcha_challenge\n                    WHERE\n                        challenge_id = $1\n                    AND reason = (SELECT ID FROM mcaptcha_challenge_reason WHERE name = $2)\n                );"
+  },
   "16864df9cf9a69c299d9ab68bac559c48f4fc433541a10f7c1b60717df2b820e": {
     "describe": {
       "columns": [
@@ -119,6 +146,21 @@
     },
     "query": "SELECT key, name, config_id, duration FROM mcaptcha_config WHERE\n            user_id = (SELECT ID FROM mcaptcha_users WHERE name = $1) "
   },
+  "1e08fab612b17ab3cf3f76cd1543fb4d4006f7c20e09ecb58e1a1cfd5a7e70a2": {
+    "describe": {
+      "columns": [],
+      "nullable": [],
+      "parameters": {
+        "Left": [
+          "Varchar",
+          "Timestamptz",
+          "Text",
+          "Text"
+        ]
+      }
+    },
+    "query": "INSERT INTO mcaptcha_challenge (challenge_id, received, reason, user_id)\n                VALUES ($1, $2, \n                    (SELECT ID FROM mcaptcha_challenge_reason WHERE name = $3),\n                    (SELECT ID FROM mcaptcha_users WHERE name = $4)\n                );\n                "
+  },
   "1e9fe69b23e4bfa7bb369455753100307e334e8dbaf02ff37cda08992fe95910": {
     "describe": {
       "columns": [],
@@ -427,6 +469,19 @@
     },
     "query": "SELECT time FROM mcaptcha_pow_solved_stats \n            WHERE config_id = (\n                SELECT config_id FROM mcaptcha_config \n                WHERE \n                    key = $1\n                AND\n                     user_id = (\n                        SELECT \n                            ID FROM mcaptcha_users WHERE name = $2)) \n                ORDER BY time DESC"
   },
+  "8a624372ec26200acdbc1c6c330dad841581e9abad586fa7f5a117a7cd289bd9": {
+    "describe": {
+      "columns": [],
+      "nullable": [],
+      "parameters": {
+        "Left": [
+          "Text",
+          "Text"
+        ]
+      }
+    },
+    "query": "DELETE\n                FROM mcaptcha_challenge\n            WHERE\n                challenge_id = $1\n            AND reason = (SELECT ID FROM mcaptcha_challenge_reason WHERE name = $2);"
+  },
   "9753721856a47438c5e72f28fd9d149db10c48e677b4613bf3f1e8487908aac8": {
     "describe": {
       "columns": [
@@ -453,6 +508,18 @@
     },
     "query": "SELECT difficulty_factor, visitor_threshold FROM mcaptcha_levels  WHERE\n            config_id = (\n                SELECT config_id FROM mcaptcha_config WHERE key = ($1)\n                ) ORDER BY difficulty_factor ASC;"
   },
+  "a209d14eb2c2eba8a750d66f74f8edcdbb02cf7c6c5249b226db30f52541a79b": {
+    "describe": {
+      "columns": [],
+      "nullable": [],
+      "parameters": {
+        "Left": [
+          "Varchar"
+        ]
+      }
+    },
+    "query": "INSERT INTO\n                    mcaptcha_challenge_reason (name)\n                VALUES ($1) ON CONFLICT DO NOTHING\n                "
+  },
   "ad196ab3ef9dc32f6de2313577ccd6c26eae9ab19df5f71ce182651983efb99a": {
     "describe": {
       "columns": [

db/db-sqlx-postgres/src/lib.rs

@@ -95,6 +95,23 @@ impl Migrate for Database {
             .run(&self.pool)
             .await
             .map_err(|e| DBError::DBError(Box::new(e)))?;
+
+        for reason in [
+            ChallengeReason::EmailVerification,
+            ChallengeReason::PasswordReset,
+        ] {
+            sqlx::query!(
+                "INSERT INTO
+                    mcaptcha_challenge_reason (name)
+                VALUES ($1) ON CONFLICT DO NOTHING
+                ",
+                reason.to_str()
+            )
+            .execute(&self.pool)
+            .await
+            .map_err(|e| DBError::DBError(Box::new(e)))?;
+        }
+
         Ok(())
     }
 }
@@ -901,6 +918,99 @@ impl MCDatabase for Database {
 
         Ok(Date::dates_to_unix(records))
     }
+
+    /// Record challenge in database
+    async fn new_challenge(
+        &self,
+        user: &str,
+        challenge: &mut Challenge,
+    ) -> DBResult<()> {
+        let now = now_unix_time_stamp();
+        loop {
+            let res = sqlx::query!(
+                "INSERT INTO mcaptcha_challenge (challenge_id, received, reason, user_id)
+                VALUES ($1, $2, 
+                    (SELECT ID FROM mcaptcha_challenge_reason WHERE name = $3),
+                    (SELECT ID FROM mcaptcha_users WHERE name = $4)
+                );
+                ",
+                &challenge.challenge.to_string(),
+                now,
+                challenge.reason.to_str(),
+                user
+            )
+            .execute(&self.pool)
+            .await;
+            if let Err(Error::Database(err)) = res {
+                use std::borrow::Cow;
+
+                if err.code() == Some(Cow::from("23505")) {
+                    let msg = err.message();
+                    if msg.contains("mcaptcha_challenge_challenge_id_key") {
+                        challenge.new_id();
+                        continue;
+                    }
+                }
+            }
+            break;
+        }
+        Ok(())
+    }
+
+    /// Record challenge in database
+    async fn fetch_challenge_user(
+        &self,
+        challenge: &Challenge,
+    ) -> DBResult<ChallengeUser> {
+        struct U {
+            name: String,
+            email: Option<String>,
+        }
+
+        let res = sqlx::query_as!(
+            U,
+            "SELECT
+                email, name
+            FROM
+                mcaptcha_users
+            WHERE
+                ID = (
+                    SELECT
+                        user_id
+                    FROM
+                        mcaptcha_challenge
+                    WHERE
+                        challenge_id = $1
+                    AND reason = (SELECT ID FROM mcaptcha_challenge_reason WHERE name = $2)
+                );",
+            challenge.challenge.to_string(),
+            challenge.reason.to_str(),
+        )
+        .fetch_one(&self.pool)
+        .await
+        .map_err(map_register_err)?;
+
+        Ok(ChallengeUser {
+            username: res.name,
+            email: res.email.unwrap(),
+        })
+    }
+
+    /// Delete a challenge from database
+    async fn delete_challenge(&self, challenge: &Challenge) -> DBResult<()> {
+        let _ = sqlx::query!(
+            "DELETE
+                FROM mcaptcha_challenge
+            WHERE
+                challenge_id = $1
+            AND reason = (SELECT ID FROM mcaptcha_challenge_reason WHERE name = $2);",
+            &challenge.challenge.to_string(),
+            challenge.reason.to_str(),
+        )
+        .execute(&self.pool)
+        .await;
+        Ok(())
+    }
 }
 
 #[derive(Clone)]

docs/CONFIGURATION.md

@@ -38,7 +38,7 @@ you will be overriding the values set in the configuration files.
 | `MCAPTCHA_DATEBASE_USERNAME`         | database username                                              |
 | `MCAPTCHA_DATEBASE_POOL`             | database connection pool size                                  |
 | `MCAPTCHA_DATEBASE_DATABASE_TYPE`    | database tpye: "postgres" or "maria"                           |
-| `DATABSE_URL` (overrides above vars) | database URL in `postgres://user:pass@host:port/dbname` format |
+| `DATABASE_URL` (overrides above vars) | database URL in `postgres://user:pass@host:port/dbname` format |
 
 #### Redis
 

templates/_reset.scss

@@ -1,18 +1,12 @@
 /*
- * Copyright (C) 2022  Aravinth Manivannan <realaravinth@batsense.net>
+ * mCaptcha is a PoW based DoS protection software.
+ * This is the frontend web component of the mCaptcha system
+ * Copyright © 2023 Aravinth Manivnanan <realaravinth@batsense.net>.
  *
- * This program is free software: you can redistribute it and/or modify
+ * Use of this source code is governed by Apache 2.0 or MIT license.
- * it under the terms of the GNU Affero General Public License as
+ * You shoud have received a copy of MIT and Apache 2.0 along with
- * published by the Free Software Foundation, either version 3 of the
+ * this program. If not, see <https://spdx.org/licenses/MIT.html> for
- * License, or (at your option) any later version.
+ * MIT or <http://www.apache.org/licenses/LICENSE-2.0> for Apache.
- *
- * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
 * {

templates/widget/main.scss

@@ -1,21 +1,15 @@
 /*
- * Copyright (C) 2022  Aravinth Manivannan <realaravinth@batsense.net>
+ * mCaptcha is a PoW based DoS protection software.
+ * This is the frontend web component of the mCaptcha system
+ * Copyright © 2023 Aravinth Manivnanan <realaravinth@batsense.net>.
  *
- * This program is free software: you can redistribute it and/or modify
+ * Use of this source code is governed by Apache 2.0 or MIT license.
- * it under the terms of the GNU Affero General Public License as
+ * You shoud have received a copy of MIT and Apache 2.0 along with
- * published by the Free Software Foundation, either version 3 of the
+ * this program. If not, see <https://spdx.org/licenses/MIT.html> for
- * License, or (at your option) any later version.
+ * MIT or <http://www.apache.org/licenses/LICENSE-2.0> for Apache.
- *
- * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-@import '../reset';
+@import "../reset";
 
 .widget__contaienr {
   align-items: center;

templates/widget/service-worker.ts

@@ -1,23 +1,19 @@
 /*
- * Copyright (C) 2022  Aravinth Manivannan <realaravinth@batsense.net>
+ * mCaptcha is a PoW based DoS protection software.
+ * This is the frontend web component of the mCaptcha system
+ * Copyright © 2023 Aravinth Manivnanan <realaravinth@batsense.net>.
  *
- * This program is free software: you can redistribute it and/or modify
+ * Use of this source code is governed by Apache 2.0 or MIT license.
- * it under the terms of the GNU Affero General Public License as
+ * You shoud have received a copy of MIT and Apache 2.0 along with
- * published by the Free Software Foundation, either version 3 of the
+ * this program. If not, see <https://spdx.org/licenses/MIT.html> for
- * License, or (at your option) any later version.
+ * MIT or <http://www.apache.org/licenses/LICENSE-2.0> for Apache.
- *
- * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-import prove from "./prove";
+
-import { PoWConfig, ServiceWorkerWork } from "./types";
 import log from "../logger";
 
+import prove from "./prove";
+import {PoWConfig, ServiceWorkerWork} from "./types";
+
 log.log("worker registered");
 onmessage = async (e) => {
   console.debug("message received at worker");