import errcode from 'err-code' ; import { equals as uint8ArrayEquals } from 'uint8arrays/equals' ; import { sha256 } from 'multiformats/hashes/sha2' ; import { base58btc } from 'multiformats/bases/base58' ; import { identity } from 'multiformats/hashes/identity' ; import * as crypto from './ed25519.js' ; import * as pbm from './keys.js' ; import { exporter } from './exporter.js' ; export class Ed25519PublicKey { private readonly _key : Uint8Array ; constructor ( key ) { this . _key = ensureKey ( key , crypto . publicKeyLength ) ; } async verify ( data , sig ) { return await crypto . hashAndVerify ( this . _key , sig , data ) ; } marshal ( ) { return this . _key ; } get bytes ( ) { return pbm . PublicKey . encode ( { Type : pbm . KeyType . Ed25519 , Data : this . marshal ( ) } ) . finish ( ) ; } equals ( key ) { return uint8ArrayEquals ( this . bytes , key . bytes ) ; } async hash ( ) { const { bytes } = await sha256 . digest ( this . bytes ) ; return bytes ; } } export class Ed25519PrivateKey { private readonly _key : Uint8Array ; private readonly _publicKey : Uint8Array ; constructor ( key , publicKey ) { this . _key = ensureKey ( key , crypto . privateKeyLength ) ; this . _publicKey = ensureKey ( publicKey , crypto . publicKeyLength ) ; } async sign ( message ) { return await crypto . hashAndSign ( this . _key , message ) ; } get public ( ) { return new Ed25519PublicKey ( this . _publicKey ) ; } marshal ( ) { return this . _key ; } get bytes ( ) { return pbm . PrivateKey . encode ( { Type : pbm . KeyType . Ed25519 , Data : this . marshal ( ) } ) . finish ( ) ; } equals ( key ) { return uint8ArrayEquals ( this . bytes , key . bytes ) ; } async hash ( ) { const { bytes } = await sha256 . digest ( this . bytes ) ; return bytes ; } returns { Promise < string > } async id ( ) { const encoding = await identity . digest ( this . public . bytes ) ; return base58btc . encode ( encoding . bytes ) . substring ( 1 ) ; } /**
     * Exports the key into a password protected `format`
     */ async export ( password , format = 'libp2p-key' ) { if ( format === 'libp2p-key' ) { return await exporter ( this . bytes , password ) ; } else { throw errcode ( new Error ( `export format '${ format }' is not supported` ) , 'ERR_INVALID_EXPORT_FORMAT' ) ; } } } export function unmarshalEd25519PrivateKey ( bytes ) { if ( bytes . length > crypto . privateKeyLength ) { bytes = ensureKey ( bytes , crypto . privateKeyLength + crypto . publicKeyLength ) ; const privateKeyBytes = bytes . slice ( 0 , crypto . privateKeyLength ) ; const publicKeyBytes = bytes . slice ( crypto . privateKeyLength , bytes . length ) ; return new Ed25519PrivateKey ( privateKeyBytes , publicKeyBytes ) ; } bytes = ensureKey ( bytes , crypto . privateKeyLength ) ; const privateKeyBytes = bytes . slice ( 0 , crypto . privateKeyLength ) ; const publicKeyBytes = bytes . slice ( crypto . publicKeyLength ) ; return new Ed25519PrivateKey ( privateKeyBytes , publicKeyBytes ) ; } export function unmarshalEd25519PublicKey ( bytes ) { bytes = ensureKey ( bytes , crypto . publicKeyLength ) ; return new Ed25519PublicKey ( bytes ) ; } export async function generateKeyPair ( ) { const { privateKey , publicKey } = await crypto . generateKey ( ) ; return new Ed25519PrivateKey ( privateKey , publicKey ) ; } export async function generateKeyPairFromSeed ( seed ) { const { privateKey , publicKey } = await crypto . generateKeyFromSeed ( seed ) ; return new Ed25519PrivateKey ( privateKey , publicKey ) ; } function ensureKey ( key , length ) { key = Uint8Array . from ( key ?? [ ] ) ; if ( key . length !== length ) { throw errcode ( new Error ( `Key must be a Uint8Array of length ${ length }, got ${ key . length }` ) , 'ERR_INVALID_KEY_TYPE' ) ; } return key ; }