A pure Rust implementation of libsodium's sealed box encryption, compatible with libsodium/sodiumoxide but without any C dependencies.

SodiumBox provides a standalone implementation of the sealed box functionality from libsodium (NaCl) using only pure Rust cryptographic libraries. It is designed to be a drop-in replacement for sodiumoxide's sealed box functionality.

The implementation uses modern, well-maintained Rust cryptographic libraries:

• x25519-dalek for Curve25519 key exchange
• xsalsa20poly1305 for authenticated encryption
• blake2 for key derivation
• salsa20 for the HSalsa20 function

• Generate X25519 keypairs for sealed box operations
• Seal messages using a recipient's public key
• Open sealed boxes created by libsodium/sodiumoxide
• Pure Rust implementation with no C dependencies
• Comprehensive test vectors based on libsodium's test suite

use sodiumbox::{generate_keypair, seal, open_sealed_box};

// Generate a new keypair
let (public_key, secret_key) = generate_keypair();

// Create a message to encrypt
let message = b"This is a secret message";

// Seal the message for the recipient
let sealed_box = seal(message, &public_key);

// Open a sealed box
let result = open_sealed_box(&sealed_box, &public_key, &secret_key);
match result {
    Ok(plaintext) => println!("Decrypted message: {:?}", plaintext),
    Err(_) => println!("Failed to decrypt"),
}

This crate is licensed under either of:

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.