Crate nono 

nono - Capability-based sandboxing library

This library provides OS-level sandboxing using Landlock (Linux) and Seatbelt (macOS) for capability-based filesystem and network isolation.

Overview

nono is a pure sandboxing primitive - it provides the mechanism for OS-enforced isolation without imposing any security policy. Clients (CLI tools, language bindings) define their own policies.

Example

use nono::{CapabilitySet, AccessMode, Sandbox};

fn main() -> nono::Result<()> {
    // Build capability set - client must add ALL paths, including system paths
    let caps = CapabilitySet::new()
        // System paths for executables to run
        .allow_path("/usr", AccessMode::Read)?
        .allow_path("/lib", AccessMode::Read)?
        .allow_path("/bin", AccessMode::Read)?
        // User paths
        .allow_path("/project", AccessMode::ReadWrite)?
        .block_network();

    // Check platform support
    let support = Sandbox::support_info();
    if !support.is_supported {
        eprintln!("Warning: {}", support.details);
    }

    // Apply sandbox - this is irreversible
    Sandbox::apply(&caps)?;

    // Now running sandboxed...
    Ok(())
}

Platform Support

• Linux: Uses Landlock LSM (kernel 5.13+)
• macOS: Uses Seatbelt sandbox
• Other platforms: Returns UnsupportedPlatform error

Re-exports

pub use capability::AccessMode;

pub use capability::CapabilitySet;

pub use capability::CapabilitySource;

pub use capability::FsCapability;

pub use diagnostic::DenialReason;

pub use diagnostic::DenialRecord;

pub use diagnostic::DiagnosticFormatter;

pub use diagnostic::DiagnosticMode;

pub use error::NonoError;

pub use error::Result;

pub use keystore::load_secrets;

pub use keystore::LoadedSecret;

pub use sandbox::Sandbox;

pub use sandbox::SupportInfo;

pub use state::SandboxState;

pub use supervisor::ApprovalBackend;

pub use supervisor::ApprovalDecision;

pub use supervisor::CapabilityRequest;

pub use supervisor::NeverGrantChecker;

pub use supervisor::SupervisorSocket;

Modules

capability

Capability model for filesystem and network access

diagnostic

Diagnostic output formatter for sandbox policy.

error

Error types for the nono library

keystore

Secure credential loading from system keystore

query

Query API for checking sandbox permissions

sandbox

OS-level sandbox implementation

state

Sandbox state persistence

supervisor

Supervisor IPC for runtime capability expansion

undo

Undo system: content-addressable snapshots with Merkle tree integrity