SAL Vault

SAL Vault is a comprehensive cryptographic library that provides secure key management, digital signatures, symmetric encryption, Ethereum wallet functionality, and encrypted key-value storage.

Features

Core Cryptographic Operations

• Symmetric Encryption: ChaCha20Poly1305 AEAD cipher for secure data encryption
• Key Derivation: PBKDF2-based key derivation from passwords
• Digital Signatures: ECDSA signing and verification using secp256k1 curves
• Key Management: Secure keypair generation and storage

Keyspace Management

• Multiple Keyspaces: Organize keys into separate, password-protected spaces
• Session Management: Secure session handling with automatic cleanup
• Keypair Organization: Named keypairs within keyspaces for easy management

Ethereum Integration

• Wallet Functionality: Create and manage Ethereum wallets from keypairs
• Transaction Signing: Sign Ethereum transactions securely
• Smart Contract Interaction: Call read functions on smart contracts
• Multi-Network Support: Support for different Ethereum networks

Key-Value Store

• Encrypted Storage: Store key-value pairs with automatic encryption
• Secure Persistence: Data is encrypted before being written to disk
• Type Safety: Strongly typed storage and retrieval operations

Rhai Scripting Integration

• Complete API Exposure: All vault functionality available in Rhai scripts
• Session Management: Script-accessible session and keyspace management
• Cryptographic Operations: Encryption, signing, and verification in scripts

Usage

Basic Cryptographic Operations

use sal_vault::symmetric::implementation::{encrypt_symmetric, decrypt_symmetric, generate_symmetric_key};

// Generate a symmetric key
let key = generate_symmetric_key();

// Encrypt data
let message = b"Hello, World!";
let encrypted = encrypt_symmetric(&key, message)?;

// Decrypt data
let decrypted = decrypt_symmetric(&key, &encrypted)?;

Keyspace and Keypair Management

use sal_vault::keyspace::{KeySpace, KeyPair};

// Create a new keyspace
let mut keyspace = KeySpace::new("my_keyspace");

// Add a keypair
keyspace.add_keypair("main_key")?;

// Sign data
if let Some(keypair) = keyspace.keypairs.get("main_key") {
    let message = b"Important message";
    let signature = keypair.sign(message);
    let is_valid = keypair.verify(message, &signature)?;
}

Ethereum Wallet Operations

use sal_vault::ethereum::wallet::EthereumWallet;
use sal_vault::ethereum::networks::NetworkConfig;

// Create wallet from keypair
let network = NetworkConfig::mainnet();
let wallet = EthereumWallet::from_keypair(&keypair, network)?;

// Get wallet address
let address = wallet.address();

Rhai Scripting

// Create and manage keyspaces
create_key_space("personal", "secure_password");
select_keyspace("personal");

// Create and use keypairs
create_keypair("signing_key");
select_keypair("signing_key");

// Sign and verify data
let message = "Important document";
let signature = sign(message);
let is_valid = verify(message, signature);

// Symmetric encryption
let key = generate_key();
let encrypted = encrypt(key, "secret data");
let decrypted = decrypt(key, encrypted);

Security Features

• Memory Safety: All sensitive data is handled securely in memory
• Secure Random Generation: Uses cryptographically secure random number generation
• Password-Based Encryption: Keyspaces are protected with password-derived keys
• Session Isolation: Each session maintains separate state and security context
• Constant-Time Operations: Critical operations use constant-time implementations

Error Handling

The library provides comprehensive error handling through the CryptoError enum:

use sal_vault::error::CryptoError;

match some_crypto_operation() {
    Ok(result) => println!("Success: {:?}", result),
    Err(CryptoError::InvalidKeyLength) => println!("Invalid key length provided"),
    Err(CryptoError::EncryptionFailed(msg)) => println!("Encryption failed: {}", msg),
    Err(CryptoError::KeypairNotFound(name)) => println!("Keypair '{}' not found", name),
    Err(e) => println!("Other error: {}", e),
}

Testing

The package includes comprehensive tests covering all functionality:

# Run all tests
cargo test

# Run specific test categories
cargo test crypto_tests
cargo test rhai_integration_tests

Note: The Rhai integration tests use global state and are automatically serialized using a test mutex to prevent interference between parallel test runs.

Dependencies

• chacha20poly1305: Symmetric encryption
• k256: Elliptic curve cryptography
• ethers: Ethereum functionality
• serde: Serialization support
• rhai: Scripting integration
• tokio: Async runtime support

License

Licensed under the Apache License, Version 2.0.