@unumid/library-crypto

Library-Crypto-TypeScript

A helper library for common Unum ID cryptographic functions in TypeScript.

Installation

This library is available from NPM, Github packages or the repository itself.

Releases

Releases of packages to the package repos, NPM and Github Packages, should be left to the Github actions CI job. The job is triggered by a tag push with a proceeding v followed by semver notation, i.e. v1.3.1. This will bumped the version defined in package.json and create a Github release on the semver version, 1.3.1. It will also handle publishing the package to each package repo with that same version.

Documentation

This readme and the auto generated typedocs serve as the official documentation.

Functionality

generateEccKeyPair

Generates secp256r1 private and public keys.

(encoding: 'base58' | 'pem' = 'pem') => Promise<{ privateKey: string; publicKey: string}>;

• arguments
  • encoding
    • optional
    • the format the key should be encoded in
    • 'base58' or 'pem'
    • defaults to 'pem'
• returns
  • Promise resolving to pem-encoded privateKey and publicKey

Usage

import { generateEccKeyPair } from 'library-crypto-typescript';

// using async/await
const { privateKey, publicKey } = await generateEccKeyPair();

// using a promise
generateEccKeyPair().then(({ privateKey, publicKey }) => {
  // do stuff
});

generateRsaKeyPair

Generates RSA private and public keys.

(encoding: 'base58' | 'pem' = 'pem') => Promise<{ privateKey: string; publicKey: string}>

• arguments
  • encoding
    • optional
    • the format the key should be encoded in
    • 'base58' or 'pem'
    • defaults to 'pem'
• returns
  • Promise resolving to pem-encoded privateKey and publicKey

Usage

import { generateRsaKeyPair } from 'library-crypto-typescript';

// using async/await
const { privateKey, publicKey } = await generateRsaKeyPair();

// using a promise
generateRsaKeyPair().then(({ privateKey, publicKey }) => {
  // do stuff
});

sign

Signs data with a secp256r1 private key.

(data: any, privateKey: string, encoding: 'base58' | 'pem' = 'pem') => string;

• arguments
  • data
    • a TypeScript object
  • privateKey
    • a pem or base58-encoded private key
  • encoding
    • optional
    • the key's encoding
    • 'base58' or 'pem'
    • defaults to 'pem'
    • must match the encoding of the provided privateKey (i.e. if you provide a base58-encoded key, this must be set to 'base58')
• returns
  • a signature encoded as a base58 string

Usage

import { generateEccKeyPair, sign } from 'library-crypto-typescript';

const { privateKey } = await generateEccKeyPair();

const data = { some: 'data' };

const signature = sign(data, privateKey);

verify

Verifies a signature with a secp256r1 private key using the corresponding public key.

(signature: string, data: any, publicKey: string, encoding: 'base58' | 'pem' = 'pem') => boolean;

• arguments
  • signature
    • a cryptographic signature encoded as a base58 string
  • data
    • a TypeScript object
    • the data signed by the private key
  • publicKey
    • a pem or base58-encoded public key
    • should correspond to the private key that signed the data
  • encoding
    • optional
    • the key's encoding
    • 'base58' or 'pem'
    • defaults to 'pem'
    • must match the encoding of the provided publicKey (i.e. if you provide a base58-encoded key, this must be set to 'base58')
• returns
  • true if the siganture is valid, false if it is not valid

Usage

import { generateEccKeyPair, sign, verify } from 'library-crypto-typescript';

const { privateKey, publicKey } = await generateEccKeyPair();

const data = { some: 'data' };

const signature = sign(data, privateKey);

const isValid = verify(signature, data, publicKey);

encrypt

Encrypts data with a single-use AES key. Returns an object contianing the encrypted data encoded as a base58 string along with information about the AES key, encrypted with an RSA public key and encoded as base58 strings

(
  did: string,
  publicKey: string,
  data: any,
  encoding: 'base58' | 'pem' = 'pem'
) => { data: string, key: { iv: string, key: string, algorithm: string, did: string } };

• arguments
  • did
    • a did (with fragment) which resolves to the public key
  • publicKey
    • a pem-encoded RSA public key
  • data
    • a TypeScript object
    • the data to encrypt
  • encoding
    • optional
    • the key's encoding
    • 'base58' or 'pem'
    • defaults to 'pem'
    • must match the encoding of the provided publicKey (i.e. if you provide a base58-encoded key, this must be set to 'base58')
• returns
  • EncryptedData
    • data
      • the encrypted data, encoded as a base58 string
    • key
      • information to allow the recipient to decrypt the encrypted data
      • iv
        • the initial vector of the AES key, encrypted with the public key and encoded as a base58 string
      • key
        • the AES key, encrypted with the public key and encoded as a base58 string
      • algorithm
        • the exact algorithm used to create the AES key, encrypted with the public key and encoded as a base58 string
      • did
        • did + fragment which resolves to the public key used to encrypt iv, key, and algorithm

Usage

import { generateRsaKeyPair, encrypt } from 'library-crypto-typescript';

const { publicKey } = await generateRsaKeyPair();

const data = { some: 'data' };

const encryptedData = encrypt(publicKey, data);

decrypt

Decrypts data encrypted with an RSA public key using the corresponding private key.

(
  privateKey: string,
  encryptedData: { data: string, key: { iv: string, key: string, algorithm: string, did: string } },
  encoding: 'base58' | 'pem' = 'pem'
) => any;

• arguments
  • privateKey
    • a pem-encoded RSA private key
    • should correspond to the public key used to encrypt the AES key contained in encryptedData
  • encryptedData
    • an object containing the encrypted data and information to decrypt it
  • encoding
    • optional
    • the key's encoding
    • 'base58' or 'pem'
    • defaults to 'pem'
    • must match the encoding of the provided privateKey (i.e. if you provide a base58-encoded key, this must be set to 'base58')
• returns
  • a TypeScript object
  • the decrypted data

Usage

import { generateRsaKeyPair, encrypt, decrypt } from 'library-crypto-typescript';

const { privateKey, publicKey } = await generateRsaKeyPair();

const data = { some: 'data' };
const encryptedData = encrypt(publicKey, data);
const decryptedData = decrypt(privateKey, encryptedData);