SM2 2023 Cryptographic Suite

An implementation of the SM2 2023 cryptographic suite for Data Integrity, compliant with W3C standards and optimized for both Node.js and browser environments.

Overview

The SM2 2023 Cryptographic Suite provides a standards-compliant implementation for:

• Data Integrity Proofs: Create and verify proofs using SM2 signatures
• Document Canonicalization: URDNA2015 algorithm implementation
• SM2/SM3: Signature generation and verification using SM2 with SM3 digest
• Cross-Platform: Consistent behavior across Node.js and browsers

Features

• Complete SM2 2023 cryptographic suite implementation
• W3C Data Integrity 1.0 compatibility
• URDNA2015 document canonicalization
• Pluggable key management support
• Comprehensive error handling

Standards Compliance

Cryptographic Standards

• GB/T 32918.1-2016: SM2 Elliptic Curve Digital Signature Algorithm
• GB/T 32905-2016: SM3 Cryptographic Hash Algorithm

W3C Standards

• Data Integrity 1.0
  • Proof creation and verification
  • Document canonicalization
  • Signature suite specification

Installation

npm install @instun/sm2-2023-cryptosuite

Usage

import { cryptosuite } from '@instun/sm2-2023-cryptosuite';

// Initialize suite with a key
const suite = {
  ...cryptosuite,
  signer: () => key.signer(),
  verifier: () => key.verifier()
};

// Create a proof
const proof = await createProof({
  document,
  suite,
  purpose
});

// Verify a proof
const result = await verifyProof({
  document,
  proof,
  suite,
  purpose
});

API Documentation

Cryptographic Suite

Core implementation of the SM2 2023 cryptographic suite.

Properties

• name: 'sm2-2023'
• requiredAlgorithm: 'SM2'

Methods

canonize(input, options)

Canonicalizes a JSON-LD document.

• Parameters:
  • input (Object|string): JSON-LD document
  • options (Object, optional): Canonicalization options
• Returns: Promise Canonicalized document

createVerifier(options)

Creates a verifier for SM2 signatures.

• Parameters:
  • options.verificationMethod (Object): Verification method object
• Returns: Verifier object with verify() method

Error Handling

The module provides specific error types:

• ArgumentError: Invalid argument errors
• FormatError: Format conversion errors
• CryptoError: Cryptographic operation errors

Each error includes:

• Descriptive message
• Error code
• Original error cause (when applicable)

Platform Requirements

• Node.js 16.x or later
• Modern browsers with ES6+ support

License

Copyright (c) 2024 Instun, Inc. All rights reserved.