Implement read-only vault domains (#6)

crates/storage/Cargo.toml

@@ -12,6 +12,7 @@ cap-tempfile.workspace = true
 clap.workspace = true
 pgp.workspace = true
 rand.workspace = true
+regex.workspace = true
 serde.workspace = true
 shlex.workspace = true
 toml.workspace = true

crates/storage/src/lib.rs

@@ -8,6 +8,7 @@
 pub mod command;
 pub mod config;
 pub mod crypto;
+pub mod read;
 pub mod recipient;
 pub mod repository;
 

crates/storage/src/read.rs

@@ -0,0 +1,691 @@
+//! Typed read-only password-store operations.
+
+use std::{collections::BTreeMap, error::Error, fmt, path::Path};
+
+use regex::bytes::{Regex, RegexBuilder};
+
+use crate::{
+    command::{EXIT_FAILURE, GrepRequest, Presentation, ShowRequest},
+    crypto::{CryptoError, KeyStore, SecretProvider},
+    repository::{
+        DirectoryPath, EntryPath, Repository, RepositoryError, RepositorySnapshot, ResolvedObject,
+        SecretBytes,
+    },
+};
+
+const EXTENSIONS_DIRECTORY: &str = ".extensions";
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub enum TreeNodeKind {
+    Directory,
+    Entry,
+}
+
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct TreeNode {
+    name: String,
+    path: String,
+    kind: TreeNodeKind,
+    children: Vec<TreeNode>,
+}
+
+impl TreeNode {
+    pub fn name(&self) -> &str {
+        &self.name
+    }
+
+    pub fn path(&self) -> &str {
+        &self.path
+    }
+
+    pub fn kind(&self) -> TreeNodeKind {
+        self.kind
+    }
+
+    pub fn children(&self) -> &[TreeNode] {
+        &self.children
+    }
+}
+
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct TreeModel {
+    title: String,
+    root: DirectoryPath,
+    children: Vec<TreeNode>,
+}
+
+impl TreeModel {
+    pub fn title(&self) -> &str {
+        &self.title
+    }
+
+    pub fn root(&self) -> &DirectoryPath {
+        &self.root
+    }
+
+    pub fn children(&self) -> &[TreeNode] {
+        &self.children
+    }
+
+    /// Render the stable, uncolored tree used by the CLI adapter.
+    pub fn render_plain(&self) -> String {
+        let mut rendered = String::new();
+        rendered.push_str(&self.title);
+        rendered.push('\n');
+        render_children(&mut rendered, &self.children, "");
+        rendered
+    }
+}
+
+pub enum ShowResult {
+    Entry(SecretBytes),
+    Directory(TreeModel),
+}
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub enum PresentationChannel {
+    Clipboard,
+    QrCode,
+}
+
+pub struct PresentationSecret {
+    entry: EntryPath,
+    line: usize,
+    channel: PresentationChannel,
+    contents: SecretBytes,
+}
+
+impl PresentationSecret {
+    pub fn entry(&self) -> &EntryPath {
+        &self.entry
+    }
+
+    pub fn line(&self) -> usize {
+        self.line
+    }
+
+    pub fn channel(&self) -> PresentationChannel {
+        self.channel
+    }
+
+    pub fn contents(&self) -> &SecretBytes {
+        &self.contents
+    }
+}
+
+impl fmt::Debug for PresentationSecret {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        formatter
+            .debug_struct("PresentationSecret")
+            .field("entry", &self.entry)
+            .field("line", &self.line)
+            .field("channel", &self.channel)
+            .field("contents", &self.contents)
+            .finish()
+    }
+}
+
+pub enum ShowOutput {
+    Display(ShowResult),
+    Present(PresentationSecret),
+}
+
+impl fmt::Debug for ShowOutput {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Display(result) => formatter.debug_tuple("Display").field(result).finish(),
+            Self::Present(secret) => formatter.debug_tuple("Present").field(secret).finish(),
+        }
+    }
+}
+
+impl fmt::Debug for ShowResult {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Entry(secret) => formatter.debug_tuple("Entry").field(secret).finish(),
+            Self::Directory(tree) => formatter.debug_tuple("Directory").field(tree).finish(),
+        }
+    }
+}
+
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct NameMatch {
+    path: String,
+    kind: TreeNodeKind,
+}
+
+impl NameMatch {
+    pub fn path(&self) -> &str {
+        &self.path
+    }
+
+    pub fn kind(&self) -> TreeNodeKind {
+        self.kind
+    }
+}
+
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct FindResults {
+    terms: Vec<String>,
+    matches: Vec<NameMatch>,
+    tree: TreeModel,
+}
+
+impl FindResults {
+    pub fn terms(&self) -> &[String] {
+        &self.terms
+    }
+
+    pub fn matches(&self) -> &[NameMatch] {
+        &self.matches
+    }
+
+    pub fn tree(&self) -> &TreeModel {
+        &self.tree
+    }
+
+    pub fn render_plain(&self) -> String {
+        format!(
+            "Search Terms: {}\n{}",
+            self.terms.join(","),
+            self.tree.render_plain()
+        )
+    }
+}
+
+pub struct GrepLine {
+    number: usize,
+    contents: SecretBytes,
+}
+
+impl GrepLine {
+    pub fn number(&self) -> usize {
+        self.number
+    }
+
+    pub fn contents(&self) -> &SecretBytes {
+        &self.contents
+    }
+}
+
+impl fmt::Debug for GrepLine {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        formatter
+            .debug_struct("GrepLine")
+            .field("number", &self.number)
+            .field("contents", &self.contents)
+            .finish()
+    }
+}
+
+pub struct GrepEntry {
+    path: EntryPath,
+    lines: Vec<GrepLine>,
+}
+
+impl GrepEntry {
+    pub fn path(&self) -> &EntryPath {
+        &self.path
+    }
+
+    pub fn lines(&self) -> &[GrepLine] {
+        &self.lines
+    }
+}
+
+impl fmt::Debug for GrepEntry {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        formatter
+            .debug_struct("GrepEntry")
+            .field("path", &self.path)
+            .field("line_count", &self.lines.len())
+            .finish()
+    }
+}
+
+#[derive(Default)]
+pub struct GrepResults {
+    entries: Vec<GrepEntry>,
+    line_numbers: bool,
+}
+
+impl GrepResults {
+    pub fn entries(&self) -> &[GrepEntry] {
+        &self.entries
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.entries.is_empty()
+    }
+
+    /// Render matched bytes without requiring the CLI to reconstruct entry semantics.
+    pub fn render_plain(&self) -> SecretBytes {
+        let mut rendered = Vec::new();
+        for entry in &self.entries {
+            rendered.extend_from_slice(entry.path.to_string().as_bytes());
+            rendered.extend_from_slice(b":\n");
+            for line in &entry.lines {
+                if self.line_numbers {
+                    rendered.extend_from_slice(line.number.to_string().as_bytes());
+                    rendered.push(b':');
+                }
+                rendered.extend_from_slice(line.contents.expose());
+                rendered.push(b'\n');
+            }
+        }
+        SecretBytes::new(rendered)
+    }
+}
+
+impl fmt::Debug for GrepResults {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        formatter
+            .debug_struct("GrepResults")
+            .field("entry_count", &self.entries.len())
+            .finish()
+    }
+}
+
+pub struct VaultReader<'a> {
+    repository: &'a Repository,
+    keys: &'a KeyStore,
+}
+
+impl<'a> VaultReader<'a> {
+    pub fn new(repository: &'a Repository, keys: &'a KeyStore) -> Self {
+        Self { repository, keys }
+    }
+
+    pub fn list(&self, directory: &DirectoryPath) -> Result<TreeModel, ReadError> {
+        let snapshot = self.repository.snapshot()?;
+        build_tree(&snapshot, directory, None)
+    }
+
+    /// Implement explicit or implicit show dispatch. No path means the root tree; a directory
+    /// produces a tree and an entry is decrypted in full.
+    pub fn show(
+        &self,
+        input: Option<&str>,
+        provider: &mut impl SecretProvider,
+    ) -> Result<ShowResult, ReadError> {
+        let snapshot = self.repository.snapshot()?;
+        let Some(input) = input else {
+            return Ok(ShowResult::Directory(build_tree(
+                &snapshot,
+                &DirectoryPath::root(),
+                None,
+            )?));
+        };
+        match snapshot.resolve(input)? {
+            ResolvedObject::Entry(entry) => {
+                let ciphertext = self.repository.read_entry(entry.path())?;
+                Ok(ShowResult::Entry(self.keys.decrypt(&ciphertext, provider)?))
+            }
+            ResolvedObject::Directory(directory) => Ok(ShowResult::Directory(build_tree(
+                &snapshot,
+                directory.path(),
+                None,
+            )?)),
+        }
+    }
+
+    /// Execute the typed show request without inspecting a rendered command or display string.
+    pub fn execute_show(
+        &self,
+        request: &ShowRequest,
+        provider: &mut impl SecretProvider,
+    ) -> Result<ShowOutput, ReadError> {
+        let Some(input) = request.entry.as_deref() else {
+            return self.show(None, provider).map(ShowOutput::Display);
+        };
+        let snapshot = self.repository.snapshot()?;
+        match snapshot.resolve(input)? {
+            ResolvedObject::Directory(_) => {
+                self.show(Some(input), provider).map(ShowOutput::Display)
+            }
+            ResolvedObject::Entry(entry) => match request.presentation {
+                Presentation::Terminal => self.show(Some(input), provider).map(ShowOutput::Display),
+                Presentation::Clipboard { line } => Ok(ShowOutput::Present(PresentationSecret {
+                    entry: entry.path().clone(),
+                    line: line.get(),
+                    channel: PresentationChannel::Clipboard,
+                    contents: self.select_line(entry.path(), line.get(), provider)?,
+                })),
+                Presentation::QrCode { line } => Ok(ShowOutput::Present(PresentationSecret {
+                    entry: entry.path().clone(),
+                    line: line.get(),
+                    channel: PresentationChannel::QrCode,
+                    contents: self.select_line(entry.path(), line.get(), provider)?,
+                })),
+            },
+        }
+    }
+
+    pub fn select_line(
+        &self,
+        entry: &EntryPath,
+        line: usize,
+        provider: &mut impl SecretProvider,
+    ) -> Result<SecretBytes, ReadError> {
+        if line == 0 {
+            return Err(ReadError::LineNotFound {
+                entry: entry.clone(),
+                line,
+            });
+        }
+        let ciphertext = self.repository.read_entry(entry)?;
+        let plaintext = self.keys.decrypt(&ciphertext, provider)?;
+        let selected = plaintext
+            .expose()
+            .split(|byte| *byte == b'\n')
+            .nth(line - 1)
+            .filter(|selected| !selected.is_empty())
+            .ok_or_else(|| ReadError::LineNotFound {
+                entry: entry.clone(),
+                line,
+            })?;
+        Ok(SecretBytes::new(selected.to_vec()))
+    }
+
+    pub fn find(&self, terms: &[String]) -> Result<FindResults, ReadError> {
+        if terms.is_empty() {
+            return Err(ReadError::MissingSearchTerms);
+        }
+        let folded = terms
+            .iter()
+            .map(|term| term.to_lowercase())
+            .collect::<Vec<_>>();
+        let snapshot = self.repository.snapshot()?;
+        let mut matches = Vec::new();
+        for directory in snapshot.directories() {
+            if directory.path().as_path().as_os_str().is_empty()
+                || hidden_path(directory.path().as_path())
+            {
+                continue;
+            }
+            let name = display_name(directory.path().as_path())?;
+            if folded.iter().any(|term| name.to_lowercase().contains(term)) {
+                matches.push(NameMatch {
+                    path: path_text(directory.path().as_path())?,
+                    kind: TreeNodeKind::Directory,
+                });
+            }
+        }
+        for entry in snapshot.entries() {
+            if hidden_path(entry.path().as_path()) {
+                continue;
+            }
+            let name = display_name(entry.path().as_path())?;
+            if folded.iter().any(|term| name.to_lowercase().contains(term)) {
+                matches.push(NameMatch {
+                    path: path_text(entry.path().as_path())?,
+                    kind: TreeNodeKind::Entry,
+                });
+            }
+        }
+        matches.sort_by(|left, right| left.path.cmp(&right.path));
+        let included = matches
+            .iter()
+            .map(|matched| matched.path.as_str())
+            .collect::<Vec<_>>();
+        let tree = build_tree(&snapshot, &DirectoryPath::root(), Some(included.as_slice()))?;
+        Ok(FindResults {
+            terms: terms.to_vec(),
+            matches,
+            tree,
+        })
+    }
+
+    pub fn grep(
+        &self,
+        request: &GrepRequest,
+        provider: &mut impl SecretProvider,
+    ) -> Result<GrepResults, ReadError> {
+        let regex = build_regex(request)?;
+        let snapshot = self.repository.snapshot()?;
+        let mut results = Vec::new();
+        for record in snapshot.entries() {
+            if hidden_path(record.path().as_path()) {
+                continue;
+            }
+            let ciphertext = self.repository.read_entry(record.path())?;
+            let plaintext = self.keys.decrypt(&ciphertext, provider)?;
+            let mut lines = Vec::new();
+            let mut plaintext_lines = plaintext
+                .expose()
+                .split(|byte| *byte == b'\n')
+                .collect::<Vec<_>>();
+            if plaintext.expose().ends_with(b"\n") {
+                plaintext_lines.pop();
+            }
+            for (index, line) in plaintext_lines.into_iter().enumerate() {
+                let matched = regex.is_match(line);
+                if matched != request.invert_match {
+                    lines.push(GrepLine {
+                        number: index + 1,
+                        contents: SecretBytes::new(line.to_vec()),
+                    });
+                }
+            }
+            if !lines.is_empty() {
+                results.push(GrepEntry {
+                    path: record.path().clone(),
+                    lines,
+                });
+            }
+        }
+        Ok(GrepResults {
+            entries: results,
+            line_numbers: request.line_number,
+        })
+    }
+}
+
+fn build_regex(request: &GrepRequest) -> Result<Regex, ReadError> {
+    let pattern = if request.fixed_strings {
+        regex::escape(&request.pattern)
+    } else {
+        request.pattern.clone()
+    };
+    RegexBuilder::new(&pattern)
+        .case_insensitive(request.ignore_case)
+        .build()
+        .map_err(|_| ReadError::InvalidRegex)
+}
+
+#[derive(Default)]
+struct MutableNode {
+    directory: bool,
+    children: BTreeMap<String, MutableNode>,
+}
+
+fn build_tree(
+    snapshot: &RepositorySnapshot,
+    root: &DirectoryPath,
+    included: Option<&[&str]>,
+) -> Result<TreeModel, ReadError> {
+    if snapshot
+        .directories()
+        .all(|directory| directory.path() != root)
+    {
+        return Err(ReadError::Repository(RepositoryError::NotFound {
+            path: root.as_path().to_owned(),
+        }));
+    }
+    let mut mutable = MutableNode {
+        directory: true,
+        children: BTreeMap::new(),
+    };
+    for directory in snapshot.directories() {
+        let path = directory.path().as_path();
+        if path == root.as_path() || !path.starts_with(root.as_path()) || hidden_path(path) {
+            continue;
+        }
+        if included.is_some_and(|included| !is_included_path(path, included, true)) {
+            continue;
+        }
+        insert_path(
+            &mut mutable,
+            path.strip_prefix(root.as_path()).expect("prefix"),
+            true,
+        )?;
+    }
+    for entry in snapshot.entries() {
+        let path = entry.path().as_path();
+        if !path.starts_with(root.as_path()) || hidden_path(path) {
+            continue;
+        }
+        if included.is_some_and(|included| !is_included_path(path, included, false)) {
+            continue;
+        }
+        insert_path(
+            &mut mutable,
+            path.strip_prefix(root.as_path()).expect("prefix"),
+            false,
+        )?;
+    }
+    let title = if root.as_path().as_os_str().is_empty() {
+        "Password Store".to_owned()
+    } else {
+        path_text(root.as_path())?
+    };
+    Ok(TreeModel {
+        title,
+        root: root.clone(),
+        children: finalize_children(mutable, root.as_path())?,
+    })
+}
+
+fn insert_path(root: &mut MutableNode, path: &Path, directory: bool) -> Result<(), ReadError> {
+    let components = path
+        .components()
+        .map(|component| {
+            component
+                .as_os_str()
+                .to_str()
+                .map(str::to_owned)
+                .ok_or(ReadError::NonUtf8Path)
+        })
+        .collect::<Result<Vec<_>, _>>()?;
+    let mut node = root;
+    for (index, component) in components.iter().enumerate() {
+        node = node.children.entry(component.clone()).or_default();
+        if index + 1 < components.len() || directory {
+            node.directory = true;
+        }
+    }
+    Ok(())
+}
+
+fn finalize_children(node: MutableNode, parent: &Path) -> Result<Vec<TreeNode>, ReadError> {
+    node.children
+        .into_iter()
+        .map(|(name, child)| {
+            let path = parent.join(&name);
+            let kind = if child.directory {
+                TreeNodeKind::Directory
+            } else {
+                TreeNodeKind::Entry
+            };
+            let children = finalize_children(child, &path)?;
+            Ok(TreeNode {
+                name,
+                path: path_text(&path)?,
+                kind,
+                children,
+            })
+        })
+        .collect()
+}
+
+fn render_children(rendered: &mut String, children: &[TreeNode], prefix: &str) {
+    for (index, child) in children.iter().enumerate() {
+        let last = index + 1 == children.len();
+        rendered.push_str(prefix);
+        rendered.push_str(if last { "└── " } else { "├── " });
+        rendered.push_str(child.name());
+        rendered.push('\n');
+        let continuation = format!("{prefix}{}", if last { "    " } else { "│   " });
+        render_children(rendered, child.children(), &continuation);
+    }
+}
+
+fn is_included_path(path: &Path, included: &[&str], directory: bool) -> bool {
+    let text = path.to_string_lossy();
+    included.iter().any(|candidate| {
+        let candidate = Path::new(candidate);
+        candidate == path
+            || (directory && candidate.starts_with(path))
+            || path.starts_with(candidate)
+    }) || included.iter().any(|candidate| *candidate == text)
+}
+
+fn hidden_path(path: &Path) -> bool {
+    path.components()
+        .any(|component| component.as_os_str() == EXTENSIONS_DIRECTORY)
+}
+
+fn display_name(path: &Path) -> Result<&str, ReadError> {
+    path.file_name()
+        .and_then(|name| name.to_str())
+        .ok_or(ReadError::NonUtf8Path)
+}
+
+fn path_text(path: &Path) -> Result<String, ReadError> {
+    path.to_str()
+        .map(str::to_owned)
+        .ok_or(ReadError::NonUtf8Path)
+}
+
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub enum ReadError {
+    Repository(RepositoryError),
+    Crypto(CryptoError),
+    MissingSearchTerms,
+    InvalidRegex,
+    NonUtf8Path,
+    LineNotFound { entry: EntryPath, line: usize },
+}
+
+impl fmt::Display for ReadError {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Repository(error) => error.fmt(formatter),
+            Self::Crypto(error) => error.fmt(formatter),
+            Self::MissingSearchTerms => formatter.write_str("at least one search term is required"),
+            Self::InvalidRegex => formatter.write_str("decrypted grep pattern is invalid"),
+            Self::NonUtf8Path => formatter.write_str("password-store path is not valid UTF-8"),
+            Self::LineNotFound { entry, line } => {
+                write!(formatter, "entry {entry} has no nonempty line {line}")
+            }
+        }
+    }
+}
+
+impl Error for ReadError {
+    fn source(&self) -> Option<&(dyn Error + 'static)> {
+        match self {
+            Self::Repository(error) => Some(error),
+            Self::Crypto(error) => Some(error),
+            _ => None,
+        }
+    }
+}
+
+impl From<RepositoryError> for ReadError {
+    fn from(error: RepositoryError) -> Self {
+        Self::Repository(error)
+    }
+}
+
+impl From<CryptoError> for ReadError {
+    fn from(error: CryptoError) -> Self {
+        Self::Crypto(error)
+    }
+}
+
+impl ReadError {
+    pub fn exit_code(&self) -> u8 {
+        EXIT_FAILURE
+    }
+}

crates/storage/tests/read_domains.rs

@@ -0,0 +1,298 @@
+#![forbid(unsafe_code)]
+
+mod support;
+
+use std::{collections::BTreeMap, fs, num::NonZeroUsize, path::Path};
+
+use ironstorage::{
+    command::{EXIT_FAILURE, GrepRequest, Presentation, ShowRequest},
+    crypto::{KeyInfo, KeyStore, SecretProvider, SecretProviderError},
+    read::{PresentationChannel, ReadError, ShowOutput, ShowResult, TreeNodeKind, VaultReader},
+    repository::{DirectoryPath, EntryPath, Repository, RepositoryError, SecretBytes},
+};
+use support::compatibility::{FixtureSet, TestResult};
+
+struct FixtureSecrets {
+    values: BTreeMap<String, Vec<u8>>,
+}
+
+impl FixtureSecrets {
+    fn all(fixture: &FixtureSet) -> Self {
+        Self {
+            values: fixture
+                .generated
+                .keys
+                .iter()
+                .map(|key| {
+                    (
+                        key.primary_fingerprint.clone(),
+                        key.passphrase.as_bytes().to_vec(),
+                    )
+                })
+                .collect(),
+        }
+    }
+}
+
+impl SecretProvider for FixtureSecrets {
+    fn secret_for(&mut self, key: &KeyInfo) -> Result<SecretBytes, SecretProviderError> {
+        self.values
+            .get(key.fingerprint().as_str())
+            .cloned()
+            .map(SecretBytes::new)
+            .ok_or(SecretProviderError::Unavailable)
+    }
+}
+
+#[test]
+fn deterministic_root_and_subtree_models_render_without_ciphertext_suffixes() -> TestResult {
+    let fixture = FixtureSet::load()?;
+    let store = fixture.materialize_store("basic")?;
+    let repository = Repository::open(store.path())?;
+    let keys = KeyStore::load(fixture.path("keys"))?;
+    let reader = VaultReader::new(&repository, &keys);
+
+    let root = reader.list(&DirectoryPath::root())?;
+    assert_eq!(root.title(), "Password Store");
+    assert_eq!(
+        root.render_plain(),
+        concat!(
+            "Password Store\n",
+            "├── email\n",
+            "│   └── personal\n",
+            "├── otp\n",
+            "│   ├── hotp\n",
+            "│   └── totp\n",
+            "├── shared\n",
+            "│   └── multiple\n",
+            "├── team\n",
+            "│   └── service\n",
+            "└── unicode\n",
+            "    └── 咖啡\n",
+        )
+    );
+    assert!(!root.render_plain().contains(".gpg"));
+    assert!(!root.render_plain().contains(".gpg-id"));
+
+    let team = reader.list(&DirectoryPath::parse("team")?)?;
+    assert_eq!(team.title(), "team");
+    assert_eq!(team.render_plain(), "team\n└── service\n");
+    assert!(matches!(
+        reader.list(&DirectoryPath::parse("missing")?),
+        Err(ReadError::Repository(RepositoryError::NotFound { .. }))
+    ));
+    Ok(())
+}
+
+#[test]
+fn explicit_and_implicit_show_dispatch_to_entry_or_directory() -> TestResult {
+    let fixture = FixtureSet::load()?;
+    let store = fixture.materialize_store("basic")?;
+    let repository = Repository::open(store.path())?;
+    let keys = KeyStore::load(fixture.path("keys"))?;
+    let reader = VaultReader::new(&repository, &keys);
+    let mut provider = FixtureSecrets::all(&fixture);
+
+    let expected = fixture.read("expected/basic/email/personal.txt")?;
+    match reader.show(Some("email/personal"), &mut provider)? {
+        ShowResult::Entry(secret) => assert_eq!(secret.expose(), expected),
+        ShowResult::Directory(_) => panic!("entry dispatched as directory"),
+    }
+    match reader.show(Some("team"), &mut provider)? {
+        ShowResult::Directory(tree) => assert_eq!(tree.render_plain(), "team\n└── service\n"),
+        ShowResult::Entry(_) => panic!("directory dispatched as entry"),
+    }
+    match reader.show(None, &mut provider)? {
+        ShowResult::Directory(tree) => assert_eq!(tree.title(), "Password Store"),
+        ShowResult::Entry(_) => panic!("default show did not list root"),
+    }
+    assert!(matches!(
+        reader.show(Some("does-not-exist"), &mut provider),
+        Err(ReadError::Repository(RepositoryError::NotFound { .. }))
+    ));
+    Ok(())
+}
+
+#[test]
+fn typed_clipboard_and_qr_requests_select_lines_without_rendered_state() -> TestResult {
+    let fixture = FixtureSet::load()?;
+    let store = fixture.materialize_store("basic")?;
+    let repository = Repository::open(store.path())?;
+    let keys = KeyStore::load(fixture.path("keys"))?;
+    let reader = VaultReader::new(&repository, &keys);
+    let mut provider = FixtureSecrets::all(&fixture);
+
+    let clipboard = ShowRequest {
+        entry: Some("email/personal".to_owned()),
+        presentation: Presentation::Clipboard {
+            line: NonZeroUsize::new(1).expect("nonzero"),
+        },
+    };
+    let ShowOutput::Present(clipboard) = reader.execute_show(&clipboard, &mut provider)? else {
+        panic!("clipboard request was not selected")
+    };
+    assert_eq!(clipboard.channel(), PresentationChannel::Clipboard);
+    assert_eq!(clipboard.line(), 1);
+    assert_eq!(clipboard.contents().expose(), b"correct horse fixture");
+    assert!(!format!("{clipboard:?}").contains("correct horse"));
+
+    let qr = ShowRequest {
+        entry: Some("email/personal".to_owned()),
+        presentation: Presentation::QrCode {
+            line: NonZeroUsize::new(2).expect("nonzero"),
+        },
+    };
+    let ShowOutput::Present(qr) = reader.execute_show(&qr, &mut provider)? else {
+        panic!("QR request was not selected")
+    };
+    assert_eq!(qr.channel(), PresentationChannel::QrCode);
+    assert_eq!(qr.contents().expose(), b"login: alice@example.test");
+
+    let missing = reader.select_line(&EntryPath::parse("email/personal")?, 99, &mut provider);
+    assert!(matches!(
+        &missing,
+        Err(ReadError::LineNotFound { line: 99, .. })
+    ));
+    assert_eq!(missing.unwrap_err().exit_code(), EXIT_FAILURE);
+    Ok(())
+}
+
+#[test]
+fn find_matches_entry_and_directory_names_case_insensitively() -> TestResult {
+    let fixture = FixtureSet::load()?;
+    let store = fixture.materialize_store("basic")?;
+    let repository = Repository::open(store.path())?;
+    let keys = KeyStore::load(fixture.path("keys"))?;
+    let reader = VaultReader::new(&repository, &keys);
+
+    let results = reader.find(&["service".to_owned(), "咖啡".to_owned()])?;
+    assert_eq!(
+        results
+            .matches()
+            .iter()
+            .map(|matched| (matched.path(), matched.kind()))
+            .collect::<Vec<_>>(),
+        vec![
+            ("team/service", TreeNodeKind::Entry),
+            ("unicode/咖啡", TreeNodeKind::Entry),
+        ]
+    );
+    assert_eq!(
+        results.tree().render_plain(),
+        concat!(
+            "Password Store\n",
+            "├── team\n",
+            "│   └── service\n",
+            "└── unicode\n",
+            "    └── 咖啡\n",
+        )
+    );
+    assert!(
+        results
+            .render_plain()
+            .starts_with("Search Terms: service,咖啡\nPassword Store\n")
+    );
+    let personal = reader.find(&["PERSONAL".to_owned()])?;
+    assert_eq!(personal.matches()[0].path(), "email/personal");
+    assert!(matches!(
+        reader.find(&[]),
+        Err(ReadError::MissingSearchTerms)
+    ));
+    Ok(())
+}
+
+#[test]
+fn decrypted_grep_supports_regex_case_inversion_fixed_strings_and_lines() -> TestResult {
+    let fixture = FixtureSet::load()?;
+    let store = fixture.materialize_store("basic")?;
+    let repository = Repository::open(store.path())?;
+    let keys = KeyStore::load(fixture.path("keys"))?;
+    let reader = VaultReader::new(&repository, &keys);
+    let mut provider = FixtureSecrets::all(&fixture);
+
+    let mut numbered = grep("alice@example\\.test");
+    numbered.line_number = true;
+    let basic = reader.grep(&numbered, &mut provider)?;
+    assert_eq!(basic.entries().len(), 1);
+    assert_eq!(basic.entries()[0].path().to_string(), "email/personal");
+    assert_eq!(basic.entries()[0].lines()[0].number(), 2);
+    assert_eq!(
+        basic.entries()[0].lines()[0].contents().expose(),
+        b"login: alice@example.test"
+    );
+    assert!(!format!("{basic:?}").contains("alice@example"));
+    assert_eq!(
+        basic.render_plain().expose(),
+        b"email/personal:\n2:login: alice@example.test\n"
+    );
+
+    let mut insensitive = grep("FIXTURE");
+    insensitive.ignore_case = true;
+    assert!(reader.grep(&insensitive, &mut provider)?.entries().len() >= 4);
+
+    let mut fixed = grep("alice@example.test");
+    fixed.fixed_strings = true;
+    assert_eq!(reader.grep(&fixed, &mut provider)?.entries().len(), 1);
+
+    let mut inverted = grep("fixture");
+    inverted.invert_match = true;
+    let inverted = reader.grep(&inverted, &mut provider)?;
+    assert!(inverted.entries().iter().any(|entry| {
+        entry.path().to_string() == "email/personal"
+            && entry
+                .lines()
+                .iter()
+                .any(|line| line.contents().expose() == b"login: alice@example.test")
+    }));
+
+    let invalid = grep("[");
+    assert!(matches!(
+        reader.grep(&invalid, &mut provider),
+        Err(ReadError::InvalidRegex)
+    ));
+    Ok(())
+}
+
+#[test]
+fn search_excludes_extensions_git_metadata_and_ciphertext_names() -> TestResult {
+    let fixture = FixtureSet::load()?;
+    let store = fixture.materialize_store("basic")?;
+    fs::create_dir_all(store.path().join(".extensions/nested"))?;
+    fs::copy(
+        store.path().join("email/personal.gpg"),
+        store.path().join(".extensions/nested/leaked-secret.gpg"),
+    )?;
+    fs::create_dir(store.path().join(".git"))?;
+    fs::write(store.path().join(".git/secret.gpg"), b"not a packet")?;
+    fs::write(store.path().join("visible-metadata.txt"), b"fixture")?;
+    let repository = Repository::open(store.path())?;
+    let keys = KeyStore::load(fixture.path("keys"))?;
+    let reader = VaultReader::new(&repository, &keys);
+    let mut provider = FixtureSecrets::all(&fixture);
+
+    let tree = reader.list(&DirectoryPath::root())?.render_plain();
+    assert!(!tree.contains("extensions"));
+    assert!(!tree.contains(".git"));
+    assert!(!tree.contains("metadata"));
+    assert!(!tree.contains(".gpg"));
+    assert!(reader.find(&["leaked".to_owned()])?.matches().is_empty());
+    assert!(reader.find(&["metadata".to_owned()])?.matches().is_empty());
+    assert!(
+        reader
+            .grep(&grep("correct horse"), &mut provider)?
+            .entries()
+            .iter()
+            .all(|entry| !entry.path().as_path().starts_with(Path::new(".extensions")))
+    );
+    Ok(())
+}
+
+fn grep(pattern: &str) -> GrepRequest {
+    GrepRequest {
+        pattern: pattern.to_owned(),
+        ignore_case: false,
+        invert_match: false,
+        line_number: false,
+        fixed_strings: false,
+    }
+}