Crypto Toolkit

Secure-by-default cryptographic utilities library built on Libsodium.

Philosophy

"There is one way to do it" — Opinionated, misuse-resistant API following Libsodium's design philosophy:

• Secure defaults (XChaCha20-Poly1305, Argon2id)
• No weak algorithms exposed (no HS256, CBC, MD5, SHA-1)
• Automatic nonce generation
• Constant-time operations
• NIST/RFC test vector validation

Features

Core Primitives

• AEAD Encryption: XChaCha20-Poly1305 (192-bit nonce, safe for random generation)
• Password Hashing: Argon2id (OWASP-compliant parameters)
• Digital Signatures: Ed25519 (fast, deterministic)
• Key Exchange: X25519 ECDH
• Hashing: SHA-256, SHA-512, BLAKE2b
• Random Generation: CSPRNG for keys, tokens, UUIDs
• Constant-Time: Timing-safe comparisons

Advanced Features

• JWT Security: Signing, verification, algorithm lock, refresh token families, blacklisting
• API Key Management: Generation and validation
• Sealed Box: Anonymous public-key encryption

Installation

npm install @empowered-humanity/crypto-toolkit

Quick Start

Encryption

import { encrypt, decrypt, generateKey } from '@empowered-humanity/crypto-toolkit';

// Generate a key
const key = generateKey(); // 32 bytes

// Encrypt
const encrypted = encrypt('Secret message', key);

// Decrypt
const decrypted = decrypt(encrypted, key);
console.log(Buffer.from(decrypted).toString('utf-8')); // 'Secret message'

Password Hashing

import { hashPassword, verifyPassword } from '@empowered-humanity/crypto-toolkit';

// Hash
const hashed = await hashPassword('my-secure-password');

// Verify
const isValid = await verifyPassword('my-secure-password', hashed);
console.log(isValid); // true

Digital Signatures

import { generateKeyPair, sign, verify } from '@empowered-humanity/crypto-toolkit';

// Generate key pair
const keyPair = generateKeyPair();

// Sign
const signature = sign('Document to sign', keyPair.secretKey);

// Verify
const isValid = verify('Document to sign', signature, keyPair.publicKey);
console.log(isValid); // true

Key Exchange

import { generateX25519KeyPair, computeSharedSecret } from '@empowered-humanity/crypto-toolkit';

// Alice and Bob generate key pairs
const alice = generateX25519KeyPair();
const bob = generateX25519KeyPair();

// Both compute the same shared secret
const aliceShared = computeSharedSecret(alice.secretKey, bob.publicKey);
const bobShared = computeSharedSecret(bob.secretKey, alice.publicKey);
// aliceShared === bobShared (32 bytes)

Sealed Box (Anonymous Encryption)

import { sealedBox, openSealedBox, generateX25519KeyPair } from '@empowered-humanity/crypto-toolkit';

const recipient = generateX25519KeyPair();

// Encrypt (sender anonymous)
const sealed = sealedBox('Anonymous message', recipient.publicKey);

// Decrypt
const plaintext = openSealedBox(sealed, recipient.secretKey, recipient.publicKey);

CLI Usage

# Encrypt a file
te-crypto encrypt --file secret.txt --key-file key.bin --output secret.enc

# Decrypt a file
te-crypto decrypt --file secret.enc --key-file key.bin --output secret.txt

# Generate keys
te-crypto keygen --type aes256 --output keys/
te-crypto keygen --type ed25519 --output keys/
te-crypto keygen --type x25519 --output keys/

# Password hashing
te-crypto hash-password "my-password"
te-crypto verify-password "my-password" '$argon2id$v=19$...'

# Signing
te-crypto sign --file document.pdf --key private.key --output document.sig
te-crypto verify --file document.pdf --sig document.sig --key public.key

# Random generation
te-crypto random --bytes 32 --format hex
te-crypto random --format uuid
te-crypto random --format token

# Hashing
te-crypto hash --file document.pdf --algorithm sha256

Algorithm Choices

Purpose	Algorithm	Why?
Encryption	XChaCha20-Poly1305	Nonce-misuse resistant, fast, modern
Password Hashing	Argon2id	Winner of PHC, OWASP recommended
Signatures	Ed25519	Fast, small signatures, deterministic
Key Exchange	X25519	Modern ECDH on Curve25519
Hashing	BLAKE2b/SHA-256	Fast, collision-resistant

Test Vectors

All cryptographic functions are validated against official test vectors:

• RFC 8439 ChaCha20-Poly1305 vectors
• RFC 8032 Ed25519 test vectors
• Wycheproof test suite

npm test

Dependencies

• sodium-native: Libsodium bindings (core crypto)
• jose: JWT operations
• commander: CLI interface
• chalk: Terminal colors

Compliance

• NIST SP 800-57: Key management recommendations
• NIST SP 800-132: Password-based key derivation
• OWASP: Password storage cheat sheet (Argon2id, 256 MiB RAM)
• FIPS 140-3: Cryptographic module validation (when using FIPS OpenSSL)

License

MIT — See LICENSE for details.

References

• Libsodium Documentation
• RFC 8439 - ChaCha20 and Poly1305
• RFC 8032 - Ed25519
• OWASP Password Storage