set_master_pass now asks for the master password twice

cryptography/src/hashing.rs

@@ -0,0 +1,71 @@
+use entity::master_pass;
+use once_cell::sync::Lazy;
+use rand::{rngs::OsRng, RngCore};
+use scrypt::{scrypt, Params};
+use subtle::ConstantTimeEq;
+
+pub const HASH_LENGTH: usize = 64;
+pub const SALT_LENGTH: usize = 64;
+
+static PARAMS: Lazy<Params> = Lazy::new(|| Params::new(14, 8, 1, HASH_LENGTH).unwrap());
+
+/// Hashes the bytes with Scrypt with the given salt
+#[inline]
+pub fn hash_scrypt(bytes: &[u8], salt: &[u8]) -> [u8; HASH_LENGTH] {
+    let mut hash = [0; HASH_LENGTH];
+    scrypt(bytes, salt, &PARAMS, &mut hash).unwrap();
+    hash
+}
+
+/// Verifieble scrypt hashed bytes
+pub struct HashedBytes<T, U>
+where
+    T: AsRef<[u8]>,
+    U: AsRef<[u8]>,
+{
+    pub hash: T,
+    pub salt: U,
+}
+
+impl HashedBytes<[u8; HASH_LENGTH], [u8; SALT_LENGTH]> {
+    #[inline]
+    pub fn new(bytes: &[u8]) -> Self {
+        let mut salt = [0; 64];
+        OsRng.fill_bytes(&mut salt);
+        Self {
+            hash: hash_scrypt(bytes, &salt),
+            salt,
+        }
+    }
+}
+
+impl<T, U> HashedBytes<T, U>
+where
+    T: AsRef<[u8]>,
+    U: AsRef<[u8]>,
+{
+    #[inline]
+    pub fn verify(&self, bytes: &[u8]) -> bool {
+        let hash = hash_scrypt(bytes, self.salt.as_ref());
+        hash.ct_eq(self.hash.as_ref()).into()
+    }
+}
+
+impl<'a> From<&'a master_pass::Model> for HashedBytes<&'a [u8], &'a [u8]> {
+    #[inline]
+    fn from(value: &'a master_pass::Model) -> Self {
+        HashedBytes {
+            hash: &value.password_hash,
+            salt: &value.salt,
+        }
+    }
+}
+
+impl From<master_pass::Model> for HashedBytes<Vec<u8>, Vec<u8>> {
+    fn from(value: master_pass::Model) -> Self {
+        Self {
+            hash: value.password_hash,
+            salt: value.salt,
+        }
+    }
+}

cryptography/src/lib.rs

@@ -1,6 +1,7 @@
 //! Functions to encrypt the database models
 
 pub mod account;
+pub mod hashing;
 pub mod master_pass;
 pub mod passwords;
 pub mod prelude;

cryptography/src/master_pass.rs

@@ -1,35 +1,6 @@
+use super::hashing::HashedBytes;
 use entity::master_pass;
-use once_cell::sync::Lazy;
-use rand::{rngs::OsRng, RngCore};
-use scrypt::{scrypt, Params};
 use sea_orm::ActiveValue::Set;
-use subtle::ConstantTimeEq;
-
-const HASH_LENGTH: usize = 64;
-const SALT_LENGTH: usize = 64;
-
-static PARAMS: Lazy<Params> = Lazy::new(|| Params::new(14, 8, 1, HASH_LENGTH).unwrap());
-
-/// Hashes the password with Scrypt with the given salt
-#[inline]
-fn hash_password(password: &[u8], salt: &[u8]) -> [u8; HASH_LENGTH] {
-    let mut password_hash = [0; HASH_LENGTH];
-    scrypt(password, salt, &PARAMS, &mut password_hash).unwrap();
-    password_hash
-}
-
-pub trait VerifyMasterPassExt {
-    fn verify(&self, password: &str) -> bool;
-}
-
-impl VerifyMasterPassExt for master_pass::Model {
-    /// Checks that the given password hash matches the one of the model
-    #[inline]
-    fn verify(&self, password: &str) -> bool {
-        let hashed = hash_password(password.as_bytes(), &self.salt);
-        hashed.ct_eq(&self.password_hash).into()
-    }
-}
 
 pub trait MasterPassFromUnencryptedExt {
     fn from_unencrypted(user_id: u64, password: &str) -> master_pass::ActiveModel;
@@ -39,13 +10,11 @@ impl MasterPassFromUnencryptedExt for master_pass::ActiveModel {
     /// Hashes the password and creates an ActiveModel with all fields set to Set variant
     #[inline]
     fn from_unencrypted(user_id: u64, password: &str) -> Self {
-        let mut salt = [0; SALT_LENGTH];
-        OsRng.fill_bytes(&mut salt);
-        let password_hash = hash_password(password.as_bytes(), &salt);
+        let hash = HashedBytes::new(password.as_bytes());
         Self {
             user_id: Set(user_id),
-            salt: Set(salt.into()),
-            password_hash: Set(password_hash.into()),
+            password_hash: Set(hash.hash.to_vec()),
+            salt: Set(hash.salt.to_vec()),
         }
     }
 }

src/commands/set_master_pass.rs

@@ -1,24 +1,67 @@
 use crate::{change_state, prelude::*};
+use cryptography::hashing::HashedBytes;
+use sea_orm::ActiveValue::Set;
 use tokio::task::spawn_blocking;
 
-/// Actually sets the master password
-async fn get_master_pass(
+async fn get_master_pass2(
     bot: Throttle<Bot>,
     msg: Message,
     db: DatabaseConnection,
     dialogue: MainDialogue,
     mut ids: MessageIds,
+    hash: HashedBytes<[u8; 64], [u8; 64]>,
     master_pass: String,
 ) -> crate::Result<()> {
     dialogue.exit().await?;
+    let user_id = Set(msg.from().ok_or(NoUserInfo)?.id.0);
 
-    let user_id = msg.from().ok_or(NoUserInfo)?.id.0;
-    let model =
-        spawn_blocking(move || master_pass::ActiveModel::from_unencrypted(user_id, &master_pass))
-            .await?;
+    if !hash.verify(master_pass.as_bytes()) {
+        ids.alter_message(
+            &bot,
+            "The passwords didn't match. Use the command again",
+            deletion_markup(),
+            None,
+        )
+        .await?;
+
+        return Ok(());
+    }
+
+    let model = master_pass::ActiveModel {
+        user_id,
+        password_hash: Set(hash.hash.to_vec()),
+        salt: Set(hash.salt.to_vec()),
+    };
     model.insert(&db).await?;
+
     ids.alter_message(&bot, "Success", deletion_markup(), None)
         .await?;
+
+    Ok(())
+}
+
+/// Actually sets the master password
+#[inline]
+async fn get_master_pass(
+    bot: Throttle<Bot>,
+    _: Message,
+    _: DatabaseConnection,
+    dialogue: MainDialogue,
+    mut ids: MessageIds,
+    master_pass: String,
+) -> crate::Result<()> {
+    let hash = spawn_blocking(move || HashedBytes::new(master_pass.as_bytes())).await?;
+
+    ids.alter_message(&bot, "Send it again", None, None).await?;
+
+    change_state!(
+        dialogue,
+        ids,
+        (hash),
+        State::GetNewMasterPass,
+        get_master_pass2
+    );
+
     Ok(())
 }
 

src/state/get_master_pass.rs

@@ -1,4 +1,5 @@
 use crate::prelude::*;
+use cryptography::hashing::HashedBytes;
 use log::error;
 use tokio::task::spawn_blocking;
 
@@ -14,8 +15,9 @@ async fn check_master_pass(
 
     let is_valid = match model {
         Some(model) => {
+            let hash: HashedBytes<_, _> = model.into();
             let master_pass = master_pass.to_owned();
-            spawn_blocking(move || model.verify(&master_pass)).await?
+            spawn_blocking(move || hash.verify(master_pass.as_bytes())).await?
         }
         None => {
             error!("User was put into the GetMasterPass state with no master password set");