@scintilla-network/signatures

Enhanced signature and key exchange functions for scintilla and crypto/blockchain use.
Provides classical cryptographic signatures with quantum-resistant alternatives.


Features

- Classic Signatures
- secp256k1 (Bitcoin/Ethereum)
- ed25519 (EdDSA)
- BLS12-381 (Aggregatable signatures)
- Post-quantum Signatures
- ML-DSA/Dilithium (Fast lattice-based)
- SLH-DSA/SPHINCS+ (Hash-based, conservative)
- Key Exchange
- ECDH (Classic elliptic curve)
- ML-KEM/Kyber (Post-quantum lattice)
- Security
- Audited implementations
- NIST-approved algorithms
- Zero dependencies beyond noble libraries

Installation

``bash
npm install @scintilla-network/signatures
`

Quick Start

`javascript
import { secp256k1 } from '@scintilla-network/signatures/classic';

// Generate a key pair
const privateKey = secp256k1.generatePrivateKey();
const publicKey = secp256k1.getPublicKey(privateKey);

// Sign a message
const message = 'Hello, Scintilla!';
const signature = secp256k1.sign(message, privateKey);

// Verify the signature
const isValid = secp256k1.verify(signature, message, publicKey);
console.log('Signature valid:', isValid); // true
`

Usage Guide

$3

#### secp256k1 (Bitcoin/Ethereum)

`javascript
import { secp256k1 } from '@scintilla-network/signatures/classic';

// Generate keys
const privateKey = secp256k1.generatePrivateKey();
const publicKey = secp256k1.getPublicKey(privateKey);

// Sign and verify
const signature = secp256k1.sign(message, privateKey);
const isValid = secp256k1.verify(signature, message, publicKey);
`

#### ed25519 (EdDSA)

`javascript
import { ed25519 } from '@scintilla-network/signatures/classic';

// Generate key pair
const { privateKey, publicKey } = ed25519.generateKeyPair();

// Sign and verify
const signature = ed25519.sign(message, privateKey);
const isValid = ed25519.verify(signature, message, publicKey);
`

#### BLS12-381 (Aggregatable)

`javascript
import { bls12_381 } from '@scintilla-network/signatures/classic';

// Generate multiple key pairs
const keys1 = bls12_381.generateKeyPair();
const keys2 = bls12_381.generateKeyPair();

// Sign same message with different keys
const sig1 = bls12_381.sign(message, keys1.privateKey);
const sig2 = bls12_381.sign(message, keys2.privateKey);

// Aggregate signatures and public keys
const aggSig = bls12_381.aggregateSignatures([sig1, sig2]);
const aggPub = bls12_381.aggregatePublicKeys([keys1.publicKey, keys2.publicKey]);

// Verify aggregated signature
const isValid = bls12_381.verify(aggSig, message, aggPub);
`

BLS supports long and short signatures.

`javascript
const sig = bls12_381.sign(message, privateKey, { short: true });
const isValid = bls12_381.verify(sig, message, publicKey, { short: true });
`

BLS supports automatically hashing the message. Such can be disabled with the hash option.

`javascript
const sig = bls12_381.sign(message, privateKey, { hash: false });
const isValid = bls12_381.verify(sig, message, publicKey, { hash: false });
`

$3

All signature functions accept messages in multiple formats:

- Uint8Array: Raw bytes
- string: UTF-8 encoded text or hex string
- object: Automatically JSON stringified

`javascript
// All these are valid
signature = secp256k1.sign(new Uint8Array([1,2,3]), privateKey);
signature = secp256k1.sign("Hello, World!", privateKey);
signature = secp256k1.sign("0123456789abcdef", privateKey); // hex
signature = secp256k1.sign({ foo: "bar" }, privateKey); // object
`

$3

For advanced use cases:

`javascript
import {
toHex,
fromHex,
toUtf8,
fromUtf8,
formatMessage
} from '@scintilla-network/signatures/utils';

// Convert between formats
const hex = toHex(bytes);
const bytes = fromHex(hex);

// UTF-8 encoding/decoding
const utf8Bytes = fromUtf8("Hello");
const text = toUtf8(utf8Bytes);

// Automatic message formatting
const formatted = formatMessage(message);
``

$3

- Classic signatures are not quantum-resistant
- Consider using PQ signatures for long-term security

Related Packages

- @scintilla-network/hashes: Hashes, KDFs, utilities
- @scintilla-network/ciphers: Ciphers encryption and decryption
- @scintilla-network/mnemonic: Mnemonics phrase generation and derivation

License

MIT License - see the LICENSE file for details

Credits

This library builds upon the excellent work of:

- noble-curves by Paul Miller
- noble-post-quantum by Paul Miller

Both libraries are audited and maintained with support from various blockchain foundations. A big thank for their contributions to the crypto community.