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| import * as CryptoJS from 'crypto-js';
import * as blake from './libs/blake2b';
import base58 from './libs/base58';
import ed2curve from './libs/ed2curve';
import * as nacl from 'tweetnacl';
export const libs = {
CryptoJS,
blake,
base58,
ed2curve,
};
export const concat = (...arrays: (Uint8Array | number[])[]): Uint8Array =>
arrays.reduce((a, b) => Uint8Array.from([...a, ...b]), new Uint8Array(0)) as Uint8Array;
export function buildAddress(publicKeyBytes: Uint8Array, chainId: string = 'L'): string {
const prefix = [1, chainId.charCodeAt(0)];
const publicKeyHashPart = hashChain(publicKeyBytes).slice(0, 20);
const rawAddress = concat(prefix, publicKeyHashPart);
const addressHash = Uint8Array.from(hashChain(rawAddress).slice(0, 4));
return base58.encode(concat(rawAddress, addressHash));
}
export function buildDerivedAddress(publicKeyBytes: Uint8Array, secret: Uint8Array, chainId: string = 'L'): string {
const prefix = [1, chainId.charCodeAt(0)];
const publicKeyHashPart = hashChainHmac(publicKeyBytes, secret).slice(0, 20);
const rawAddress = concat(prefix, publicKeyHashPart);
const addressHash = Uint8Array.from(hashChain(rawAddress).slice(0, 4));
return base58.encode(concat(rawAddress, addressHash));
}
export function buildSeedHash(seedBytes: Uint8Array, nonce?: number): Uint8Array {
const nonceArray = [0, 0, 0, 0];
if (nonce && nonce > 0){
let remainder = nonce;
for (let i = 3; i >= 0; i--){
nonceArray[3-i] = Math.floor(remainder / 2 ** (i*8));
remainder = remainder % 2 ** (i*8);
}
}
const seedBytesWithNonce = concat(nonceArray, seedBytes);
const seedHash = hashChain(seedBytesWithNonce);
return sha256(seedHash);
}
function byteArrayToWordArrayEx(arr: Uint8Array) {
const len = arr.length;
const words: any = [];
for (let i = 0; i < len; i++) {
words[i >>> 2] |= (arr[i] & 0xff) << (24 - (i % 4) * 8);
}
return (CryptoJS.lib.WordArray.create as any)(words, len);
}
function wordArrayToByteArrayEx(wordArray: any) {
let words = wordArray.words;
let sigBytes = wordArray.sigBytes;
let u8 = new Uint8Array(sigBytes);
for (let i = 0; i < sigBytes; i++) {
u8[i] = (words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;
}
return u8;
}
export const stringToUint8Array = (str: string) =>
Uint8Array.from([...unescape(encodeURIComponent(str))].map(c => c.charCodeAt(0)));
export type PUBLIC_KEY_TYPES = string | PublicKey | Uint8Array;
export type Option<T> = T | null | undefined;
export const publicKeyToString = (pk: PUBLIC_KEY_TYPES) =>
typeof pk === 'string' ? pk : (pk instanceof Uint8Array ? base58encode(pk) : pk.public);
export const ADDRESS_LENGTH = 26;
export const PUBLIC_KEY_LENGTH = 32;
export const PRIVATE_KEY_LENGTH = 64;
export const SIGNATURE_LENGTH = 64;
export function blake2b(input: Uint8Array): Uint8Array {
return blake.blake2b(input, null, 32);
}
export function sha256(input: Uint8Array): Uint8Array {
const wordArray = byteArrayToWordArrayEx(input);
const resultWordArray = CryptoJS.SHA256(wordArray);
return wordArrayToByteArrayEx(resultWordArray);
}
export function sha256Hmac(input: Uint8Array, secret: Uint8Array): Uint8Array {
const wordArray = byteArrayToWordArrayEx(input);
const secretWordArray = byteArrayToWordArrayEx(secret);
const resultWordArray = CryptoJS.HmacSHA256(wordArray, secretWordArray);
return wordArrayToByteArrayEx(resultWordArray);
}
function hashChain(input: Uint8Array): Uint8Array {
return Uint8Array.from(sha256(blake2b(input)));
}
function hashChainHmac(input: Uint8Array, secret: Uint8Array): Uint8Array {
return Uint8Array.from(sha256Hmac(blake2b(input), secret));
}
export const base58encode = (input: Uint8Array): string =>
base58.encode(input);
export const base58decode = (input: string): Uint8Array =>
base58.decode(input);
export const chainIdOf = (address: string): string =>
String.fromCharCode(base58.decode(address)[1]);
export interface PublicKey {
public: string
}
export interface PrivateKey {
private: string
}
export type KeyPair = PublicKey & PrivateKey;
export const keyPairFromSeedHash = (seedHash: string): KeyPair => {
const bytes = sha256(base58.decode(seedHash));
const keys = nacl.sign.keyPair.fromSeed(bytes);
return {
private: base58.encode(keys.secretKey),
public: base58.encode(keys.publicKey)
};
}
export const keyPair = (seed: string, nonce: number = 0): KeyPair => {
const seedBytes = stringToUint8Array(seed);
const seedHash = buildSeedHash(seedBytes, nonce);
const keys = nacl.sign.keyPair.fromSeed(seedHash);
return {
private: base58.encode(keys.secretKey),
public: base58.encode(keys.publicKey)
};
};
export const publicKey = (seed: string, nonce: number = 0): string =>
keyPair(seed).public;
export const privateKey = (seed: string, nonce: number = 0): string =>
keyPair(seed).private;
export const address = (keyOrSeed: KeyPair | PublicKey | string, chainId: string = 'L', nonce: number = 0): string =>
typeof keyOrSeed === 'string' ?
address(keyPair(keyOrSeed, nonce), chainId) :
buildAddress(base58.decode(keyOrSeed.public), chainId);
export const deriveAddress = (key: KeyPair | PublicKey, uniqueId: string, chainId: string = 'L'): string =>
buildDerivedAddress(base58.decode(key.public), base58.decode(uniqueId), chainId);
export const signBytes = (bytes: Uint8Array, seed: string): string =>
signWithPrivateKey(bytes, privateKey(seed));
export const verifySignature = (publicKey: string, bytes: Uint8Array, signature: string): boolean => {
const signatureBytes = base58.decode(signature);
return signatureBytes.length == SIGNATURE_LENGTH &&
nacl.sign.detached.verify(bytes, signatureBytes, base58.decode(publicKey));
};
export function arraysEqual(a: any[] | Uint8Array, b: any[] | Uint8Array): boolean {
if (a === b) return true;
if (a == null || b == null) return false;
if (a.length != b.length) return false;
for (var i = 0; i < a.length; ++i) {
if (a[i] !== b[i]) return false;
}
return true;
}
export const hashBytes = (bytes: Uint8Array) => base58.encode(blake2b(bytes));
export const signWithPrivateKey = (dataBytes: Uint8Array, privateKey: string): string => {
const privateKeyBytes = base58.decode(privateKey);
const signature = nacl.sign.detached(dataBytes, privateKeyBytes);
return base58.encode(signature);
};
function nodeRandom(count: any, options: any) {
const crypto = require('crypto');
const buf = crypto.randomBytes(count);
switch (options.type) {
case 'Array':
return [].slice.call(buf);
case 'Buffer':
return buf;
case 'Uint8Array':
const arr = new Uint8Array(count);
for (let i = 0; i < count; ++i) {
arr[i] = buf.readUInt8(i);
}
return arr;
default:
throw new Error(options.type + ' is unsupported.');
}
}
function browserRandom(count: any, options: any) {
const nativeArr = new Uint8Array(count);
const crypto = (global as any).crypto || (global as any).msCrypto;
crypto.getRandomValues(nativeArr);
switch (options.type) {
case 'Array':
return [].slice.call(nativeArr);
case 'Buffer':
try {
const b = new Buffer(1);
} catch (e) {
throw new Error('Buffer not supported in this environment. Use Node.js or Browserify for browser support.');
}
return new Buffer(nativeArr);
case 'Uint8Array':
return nativeArr;
default:
throw new Error(options.type + ' is unsupported.');
}
}
const isBrowser = typeof window !== 'undefined' && ({}).toString.call(window) === '[object Window]';
const isNode = typeof global !== "undefined" && ({}).toString.call(global) === '[object global]';
const isJest = process.env.JEST_WORKER_ID !== undefined;
function secureRandom(count: any, options: any) {
options = options || {type: 'Array'};
if (isBrowser) {
return browserRandom(count, options);
} else if (isNode) {
return nodeRandom(count, options);
} else if (isJest) {
return nodeRandom(count, options);
}else {
throw new Error('Your environment is not defined');
}
}
export function randomUint8Array(length: number): Uint8Array {
return secureRandom(length, {type: 'Uint8Array'});
}
let charToNibble:Record<string, number> = {};
let nibbleToChar: string[] = [];
let i;
for (i = 0; i <= 9; ++i) {
let character = i.toString();
charToNibble[character] = i;
nibbleToChar.push(character);
}
for (i = 10; i <= 15; ++i) {
let lowerChar = String.fromCharCode('a'.charCodeAt(0) + i - 10);
let upperChar = String.fromCharCode('A'.charCodeAt(0) + i - 10);
charToNibble[lowerChar] = i;
charToNibble[upperChar] = i;
nibbleToChar.push(lowerChar);
}
export function byteArrayToHexString(bytes: Uint8Array) {
let str = '';
for (let i = 0; i < bytes.length; ++i) {
if (bytes[i] < 0) {
bytes[i] += 256;
}
str += nibbleToChar[bytes[i] >> 4] + nibbleToChar[bytes[i] & 0x0F];
}
return str;
}
export function hexStringToByteArray(str: string) {
let bytes = [];
let i = 0;
if (0 !== str.length % 2) {
bytes.push(charToNibble[str.charAt(0)]);
++i;
}
for (; i < str.length - 1; i += 2) {
bytes.push((charToNibble[str.charAt(i)] << 4) + charToNibble[str.charAt(i + 1)]);
}
return bytes;
}
export function convertED2KeyToX2(publicKey: string): string | null {
const decodedPublicKey = base58.decode(publicKey);
const convertedPublicKey = ed2curve.convertPublicKey(decodedPublicKey);
Iif (!convertedPublicKey) return null
return base58.encode(convertedPublicKey);
}
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