Add structs DecryptedNote
, EncryptedNote
and HiddenNote
This makes some invalid states unrepresentable, which is something that is desired in this application to reduce mental complexity and to reduce the risk of undesired behaviour of aplying functions like `encrypt` on already encrypted notes. `Note` is now an enum that holds the structs. This approach is similar to the one used in some parts of `std`, though in this case other approaches could be used, but they would be way too much verbose for this use case. This change was done because having functions like `hide` on already hidden functions is not a good idea (even if was they do is "just" cloning the structure...). There are some rough edges, but I'll improve them in another moment.
This commit is contained in:
parent
237f343b33
commit
c97700b29a
18
src/main.rs
18
src/main.rs
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@ -15,7 +15,7 @@ use egui::{Color32, Context, RichText, TextEdit, Widget, WidgetText};
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use log::info;
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use native_dialog::MessageDialog;
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use simple_logger::SimpleLogger;
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use crate::notes::{Note, NoteMetadata};
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use crate::notes::{DecryptedNote, Note, NoteMetadata};
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use crate::password::{check_password, entropy, generate_new_password, migrate_to_password_v1, PasswordSystem};
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use crate::saving::Saving;
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@ -108,6 +108,8 @@ impl eframe::App for App {
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if !self.tested_password && self.password.is_some() {
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if let Some(note) = self.notes.get(0) {
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match note {
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Note::Encrypted(note) => {
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if let Ok(password) = check_password(self.password.as_ref().unwrap(), note) {
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match password {
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PasswordSystem::V0(password) => {
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@ -135,6 +137,9 @@ impl eframe::App for App {
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self.tested_password = false;
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return;
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}
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}
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_ => unreachable!()
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}
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} else {
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self.password = Some(generate_new_password(self.password.as_ref().unwrap()))
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}
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@ -245,7 +250,7 @@ impl eframe::App for App {
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.then_some(metadata)
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});
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let note = Note::Decrypted {
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let note = Note::Decrypted(DecryptedNote {
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id: SystemTime::now()
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.duration_since(SystemTime::UNIX_EPOCH)
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.unwrap()
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@ -257,9 +262,9 @@ impl eframe::App for App {
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arbitrary: metadata,
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},
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text: self.text_buffer.clone(),
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};
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});
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self.saving.save_note(note.clone(), password).unwrap();
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self.saving.save_note(¬e.clone(), password).unwrap();
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let mut vec_deque = VecDeque::from(self.notes.clone());
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vec_deque.push_front(note);
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@ -353,7 +358,10 @@ impl eframe::App for App {
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if let Some(save_path) = save_path {
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let notes: Vec<Note> = self.notes.clone()
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.iter()
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.map(|note| note.decrypt(password).expect("failed to decrypt note"))
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.map(|note| match note {
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Note::Encrypted(note) => note.decrypt(password).expect("failed to decrypt note").into(),
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_ => note.clone(),
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})
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.collect();
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let json_notes = serde_json::to_string(¬es).unwrap();
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154
src/notes/mod.rs
154
src/notes/mod.rs
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@ -13,124 +13,132 @@ pub struct NoteMetadata {
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}
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub enum Note {
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Encrypted {
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id: String,
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title: String,
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metadata: NoteMetadata,
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encrypted_text: String,
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},
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Decrypted {
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id: String,
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title: String,
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metadata: NoteMetadata,
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text: String,
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},
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Hidden {
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id: String,
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title: String,
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metadata: NoteMetadata,
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text: String,
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}
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pub struct EncryptedNote {
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pub id: String,
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pub title: String,
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pub metadata: NoteMetadata,
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pub encrypted_text: String,
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}
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impl Note {
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pub fn encrypt(&self, password: &str) -> anyhow::Result<Self> {
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct DecryptedNote {
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pub id: String,
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pub title: String,
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pub metadata: NoteMetadata,
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pub text: String,
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}
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct HiddenNote(pub DecryptedNote);
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub enum Note {
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Encrypted(EncryptedNote),
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Decrypted(DecryptedNote),
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Hidden(HiddenNote),
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}
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impl DecryptedNote {
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pub fn encrypt(&self, password: &str) -> anyhow::Result<EncryptedNote> {
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let mut rng = rand::thread_rng();
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match self {
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Note::Decrypted { id, text, metadata, title } => {
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let pwbox = Sodium::build_box(&mut rng)
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.seal(password.to_string().into_bytes(), text.clone().into_bytes())?;
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.seal(password.to_string().into_bytes(), self.text.clone().into_bytes())?;
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let mut eraser = Eraser::new();
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eraser.add_suite::<Sodium>();
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let erased: ErasedPwBox = eraser.erase(&pwbox)?;
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Ok(Self::Encrypted {
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id: id.clone(),
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title: title.clone(),
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metadata: metadata.clone(),
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Ok(EncryptedNote {
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id: self.id.clone(),
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title: self.title.clone(),
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metadata: self.metadata.clone(),
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encrypted_text: serde_json::to_string(&erased)?,
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})
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}
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_ => Ok(self.clone()),
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}
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}
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pub fn decrypt(&self, password: &str) -> anyhow::Result<Self> {
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match self {
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Note::Encrypted { id, title, metadata, encrypted_text } => {
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pub fn hide(self) -> HiddenNote {
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HiddenNote(self)
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}
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}
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impl EncryptedNote {
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pub fn decrypt(&self, password: &str) -> anyhow::Result<DecryptedNote> {
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let mut eraser = Eraser::new();
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eraser.add_suite::<Sodium>();
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let erased: ErasedPwBox = serde_json::from_str(encrypted_text)?;
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let erased: ErasedPwBox = serde_json::from_str(&self.encrypted_text)?;
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let decrypted_bytes = eraser.restore(&erased)?.open(password)?.to_vec();
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let decrypted_text = String::from_utf8(decrypted_bytes)?;
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Ok(Self::Decrypted {
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id: id.clone(),
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title: title.clone(),
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metadata: metadata.clone(),
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Ok(DecryptedNote {
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id: self.id.clone(),
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title: self.title.clone(),
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metadata: self.metadata.clone(),
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text: decrypted_text,
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})
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}
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_ => Ok(self.clone()),
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}
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}
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}
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pub fn hide(self) -> Self {
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match self {
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Note::Decrypted { id, title, metadata, text } => {
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Self::Hidden { id, title, metadata, text }
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}
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_ => unreachable!()
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}
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impl HiddenNote {
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pub fn unhide(self) -> DecryptedNote {
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self.0
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}
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}
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pub fn unhide(self) -> Self {
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match self {
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Note::Hidden { id, title, metadata, text } => {
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Self::Decrypted { id, title, metadata, text }
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}
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_ => unreachable!()
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}
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impl From<HiddenNote> for Note {
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fn from(value: HiddenNote) -> Self {
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Self::Hidden(value)
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}
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}
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impl From<DecryptedNote> for Note {
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fn from(value: DecryptedNote) -> Self {
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Self::Decrypted(value)
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}
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}
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impl From<EncryptedNote> for Note {
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fn from(value: EncryptedNote) -> Self {
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Self::Encrypted(value)
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}
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}
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impl Note {
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pub fn render(&self, ui: &mut Ui, password: &str, cb: impl FnOnce(String)) -> Option<Self> {
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let mut value = None;
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ui.group(|ui| {
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match self {
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Note::Encrypted { id, title, metadata, .. } => {
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let result = render_title_and_metadata(ui, title, metadata, false, None);
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Note::Encrypted(note) => {
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let result = render_title_and_metadata(ui, ¬e.title, ¬e.metadata, false, None);
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if let Some(action) = result {
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match action {
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NoteRenderAction::Delete => cb(id.to_string()),
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NoteRenderAction::Delete => cb(note.id.to_string()),
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_ => unreachable!()
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}
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}
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if ui.button("decrypt note").clicked() {
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value = Some(self.decrypt(password).unwrap());
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value = Some(note.decrypt(password).unwrap().into());
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}
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}
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Note::Decrypted { id, title, metadata, text, .. } => {
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let result = render_title_and_metadata(ui, title, metadata, true, Some(ButtonType::Hide));
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Note::Decrypted(note) => {
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let result = render_title_and_metadata(ui, ¬e.title, ¬e.metadata, true, Some(ButtonType::Hide));
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if let Some(action) = result {
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match action {
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NoteRenderAction::Delete => cb(id.to_string()),
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NoteRenderAction::Hide => value = Some(self.clone().hide()),
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NoteRenderAction::Delete => cb(note.id.to_string()),
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NoteRenderAction::Hide => value = Some(note.clone().hide().into()),
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_ => unreachable!()
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}
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}
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ui.label(text);
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ui.label(¬e.text);
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}
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Note::Hidden { id, title, metadata, .. } => {
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let result = render_title_and_metadata(ui, title, metadata, true, Some(ButtonType::Unhide));
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Note::Hidden(note) => {
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let result = render_title_and_metadata(ui, ¬e.0.title, ¬e.0.metadata, true, Some(ButtonType::Unhide));
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if let Some(action) = result {
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match action {
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NoteRenderAction::Delete => cb(id.to_string()),
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NoteRenderAction::Unhide => value = Some(self.clone().unhide()),
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NoteRenderAction::Delete => cb(note.0.id.to_string()),
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NoteRenderAction::Unhide => value = Some(note.clone().unhide().into()),
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_ => unreachable!()
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}
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}
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@ -142,14 +150,6 @@ impl Note {
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value
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}
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pub fn id(&self) -> String {
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match self {
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Note::Encrypted { id, .. } => id.clone(),
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Note::Decrypted { id, .. } => id.clone(),
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Note::Hidden { id, .. } => id.clone(),
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}
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}
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}
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enum NoteRenderAction {
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@ -1,7 +1,7 @@
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use anyhow::bail;
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use argon2::Argon2;
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use sha2::{Sha256, Digest};
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use crate::notes::Note;
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use crate::notes::{EncryptedNote, Note};
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use crate::saving::Saving;
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pub fn generate_new_password(password: &str) -> String {
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@ -35,7 +35,7 @@ pub enum PasswordSystem {
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V1(String),
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}
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pub fn check_password(password: &str, note: &Note) -> anyhow::Result<PasswordSystem> {
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pub fn check_password(password: &str, note: &EncryptedNote) -> anyhow::Result<PasswordSystem> {
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if note.decrypt(password).is_err() {
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let new_password = generate_new_password(password);
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if note.decrypt(&new_password).is_err() {
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@ -59,7 +59,6 @@ fn hash_password(password: &[u8], output: &mut [u8]) {
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pub fn migrate_to_password_v1(password: &str, notes: &Vec<Note>, saving: &Saving) -> anyhow::Result<String> {
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let new_password = generate_new_password(password);
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for note in notes {
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let note = note.decrypt(password)?;
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saving.save_note(note, &new_password)?;
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}
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@ -30,10 +30,15 @@ impl Saving {
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Ok(notes.into())
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}
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pub fn save_note(&self, note: Note, password: &str) -> anyhow::Result<()> {
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let note = note.encrypt(password)?;
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pub fn save_note(&self, note: &Note, password: &str) -> anyhow::Result<()> {
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let note = match note {
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Note::Encrypted(note) => note.clone(),
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Note::Decrypted(note) => note.encrypt(password)?,
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Note::Hidden(note) => note.0.encrypt(password)?,
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};
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let mut path = self.path.clone().join("_");
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path.set_file_name(format!("{}.json", note.id()));
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path.set_file_name(format!("{}.json", note.id));
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fs::write(path, serde_json::to_string(¬e)?)?;
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