@0xpolygonid/js-sdk
Version:
SDK to work with Polygon ID
116 lines (115 loc) • 4.4 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.BjjProvider = void 0;
const js_crypto_1 = require("@iden3/js-crypto");
const js_iden3_core_1 = require("@iden3/js-iden3-core");
const store_1 = require("../store");
const providerHelpers = __importStar(require("../provider-helpers"));
const utils_1 = require("../../utils");
/**
* Provider for Baby Jub Jub keys
* @public
* @class BjjProvider
* @implements implements IKeyProvider interface
*/
class BjjProvider {
/**
* Creates an instance of BjjProvider.
* @param {KmsKeyType} keyType - kms key type
* @param {AbstractPrivateKeyStore} keyStore - key store for kms
*/
constructor(keyType, keyStore) {
if (keyType !== store_1.KmsKeyType.BabyJubJub) {
throw new Error('Key type must be BabyJubJub');
}
this.keyType = keyType;
this.keyStore = keyStore;
}
/**
* get all keys
* @returns list of keys
*/
async list() {
const allKeysFromKeyStore = await this.keyStore.list();
return allKeysFromKeyStore.filter((key) => key.alias.startsWith(this.keyType));
}
/**
* generates a baby jub jub key from a seed phrase
* @param {Uint8Array} seed - byte array seed
* @returns kms key identifier
*/
async newPrivateKeyFromSeed(seed) {
const newKey = new Uint8Array(32);
newKey.set(Uint8Array.from(seed), 0);
newKey.fill(seed.length, 32, 0);
const privateKey = new js_crypto_1.PrivateKey(seed);
const publicKey = privateKey.public();
const kmsId = {
type: this.keyType,
id: providerHelpers.keyPath(this.keyType, publicKey.hex())
};
await this.keyStore.importKey({ alias: kmsId.id, key: privateKey.hex() });
return kmsId;
}
/**
* Gets public key by kmsKeyId
*
* @param {KmsKeyId} keyId - key identifier
*/
async publicKey(keyId) {
const privateKey = await this.privateKey(keyId);
return privateKey.public().hex();
}
/**
* signs prepared payload of size,
* with a key id
*
* @param {KmsKeyId} keyId - key identifier
* @param {Uint8Array} data - data to sign (32 bytes)
* @returns Uint8Array signature
*/
async sign(keyId, data) {
if (data.length != 32) {
throw new Error('data to sign is too large');
}
const i = js_iden3_core_1.BytesHelper.bytesToInt(data);
if (!(0, js_iden3_core_1.checkBigIntInField)(i)) {
throw new Error('data to sign is too large');
}
const privateKey = await this.privateKey(keyId);
const signature = privateKey.signPoseidon(i);
return signature.compress();
}
async privateKey(keyId) {
const privateKeyHex = await this.keyStore.get({ alias: keyId.id });
return new js_crypto_1.PrivateKey(js_crypto_1.Hex.decodeString(privateKeyHex));
}
async verify(message, signatureHex, keyId) {
const publicKey = await this.publicKey(keyId);
return js_crypto_1.PublicKey.newFromCompressed((0, utils_1.hexToBytes)(publicKey)).verifyPoseidon(js_iden3_core_1.BytesHelper.bytesToInt(message), js_crypto_1.Signature.newFromCompressed((0, utils_1.hexToBytes)(signatureHex)));
}
}
exports.BjjProvider = BjjProvider;