@zkp2p/reclaim-witness-sdk
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420 lines • 35.8 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.createClaimOnAttestor = createClaimOnAttestor;
const tls_1 = require("@reclaimprotocol/tls");
const make_rpc_tls_tunnel_1 = require("../client/tunnels/make-rpc-tls-tunnel");
const attestor_pool_1 = require("../client/utils/attestor-pool");
const config_1 = require("../config");
const api_1 = require("../proto/api");
const providers_1 = require("../providers");
const utils_1 = require("../utils");
const retries_1 = require("../utils/retries");
const signatures_1 = require("../utils/signatures");
const tls_2 = require("../utils/tls");
/**
* Create a claim on the attestor
*/
function createClaimOnAttestor({ logger: _logger, maxRetries = 3, ...opts }) {
const logger = _logger
// if the client has already been initialised
// and no logger is provided, use the client's logger
// otherwise default to the global logger
|| ('logger' in opts.client ? opts.client.logger : utils_1.logger);
return (0, retries_1.executeWithRetries)(attempt => (_createClaimOnAttestor({
...opts,
logger: attempt
? logger.child({ attempt })
: logger
})), { maxRetries, logger, shouldRetry });
}
function shouldRetry(err) {
if (err instanceof TypeError) {
return false;
}
return err instanceof utils_1.AttestorError
&& err.code !== 'ERROR_INVALID_CLAIM'
&& err.code !== 'ERROR_BAD_REQUEST'
&& err.code !== 'ERROR_AUTHENTICATION_FAILED';
}
async function _createClaimOnAttestor({ name, params, secretParams, context, onStep, ownerPrivateKey, client: clientInit, logger = utils_1.logger, timestampS, updateProviderParams, updateParametersFromOprfData = true, ...zkOpts }) {
const provider = providers_1.providers[name];
const hostPort = (0, utils_1.getProviderValue)(params, provider.hostPort, secretParams);
const geoLocation = (0, utils_1.getProviderValue)(params, provider.geoLocation, secretParams);
const providerTlsOpts = (0, utils_1.getProviderValue)(params, provider.additionalClientOptions);
const tlsOpts = {
...(0, tls_2.getDefaultTlsOptions)(),
...providerTlsOpts,
};
const { zkEngine = 'snarkjs' } = zkOpts;
let redactionMode = (0, utils_1.getProviderValue)(params, provider.writeRedactionMode);
const [host, port] = hostPort.split(':');
const resParser = (0, utils_1.makeHttpResponseParser)();
let client;
let lastMsgRevealed = false;
const revealMap = new Map();
onStep === null || onStep === void 0 ? void 0 : onStep({ name: 'connecting' });
let endedHttpRequest;
const createTunnelReq = {
host,
port: port ? +port : config_1.DEFAULT_HTTPS_PORT,
geoLocation,
id: (0, utils_1.generateTunnelId)()
};
const authRequest = 'authRequest' in clientInit
? (typeof clientInit.authRequest === 'function'
? await clientInit.authRequest()
: clientInit.authRequest)
: undefined;
const tunnel = await (0, make_rpc_tls_tunnel_1.makeRpcTlsTunnel)({
tlsOpts,
connect: (connectMsgs) => {
let created = false;
if ('metadata' in clientInit) {
client = clientInit;
}
else {
client = (0, attestor_pool_1.getAttestorClientFromPool)(clientInit.url, () => {
created = true;
return {
authRequest: authRequest,
initMessages: connectMsgs,
logger
};
});
}
if (!created) {
client
.waitForInit()
.then(() => client.sendMessage(...connectMsgs))
.catch(err => {
logger.error({ err }, 'error in sending init msgs');
});
}
return client;
},
logger,
request: createTunnelReq,
onMessage(data) {
logger.debug({ bytes: data.length }, 'recv data from server');
resParser.onChunk(data);
if (resParser.res.complete) {
logger === null || logger === void 0 ? void 0 : logger.debug('got complete HTTP response from server');
// wait a little bit to make sure the client has
// finished writing the response
setTimeout(() => {
endedHttpRequest === null || endedHttpRequest === void 0 ? void 0 : endedHttpRequest();
}, 100);
}
},
onClose(err) {
const level = err ? 'error' : 'debug';
logger === null || logger === void 0 ? void 0 : logger[level]({ err }, 'tls session ended');
endedHttpRequest === null || endedHttpRequest === void 0 ? void 0 : endedHttpRequest(err);
try {
resParser.streamEnded();
}
catch (_a) { }
},
});
const { version: tlsVersion, cipherSuite } = tunnel.tls.getMetadata();
if (tlsVersion === 'TLS1_2' && redactionMode !== 'zk') {
redactionMode = 'zk';
logger.info('TLS1.2 detected, defaulting to zk redaction mode');
}
const { redactions, data: requestStr } = provider.createRequest(
// @ts-ignore
secretParams, params, logger);
const requestData = typeof requestStr === 'string'
? (0, tls_1.strToUint8Array)(requestStr)
: requestStr;
logger.debug({ redactions: redactions.length }, 'generated request');
const waitForAllData = new Promise((resolve, reject) => {
endedHttpRequest = err => (err ? reject(err) : resolve());
});
onStep === null || onStep === void 0 ? void 0 : onStep({ name: 'sending-request-data' });
try {
if (redactionMode === 'zk') {
await writeRedactedZk();
}
else {
await writeRedactedWithKeyUpdate();
}
logger.info('wrote request to server');
}
catch (err) {
// wait for complete stream end when the session is closed
// mid-write, as this means the server could not process
// our request due to some error. Hope the stream end
// error will be more descriptive
logger.error({ err }, 'session errored during write, waiting for stream end');
}
onStep === null || onStep === void 0 ? void 0 : onStep({ name: 'waiting-for-response' });
await waitForAllData;
await tunnel.close();
logger.info('got full response from server');
// update the response selections
if (updateProviderParams) {
const { params: updatedParms, secretParams: updatedSecretParms } = await updateProviderParams(tunnel.transcript, tlsVersion !== null && tlsVersion !== void 0 ? tlsVersion : 'TLS1_2');
params = { ...params, ...updatedParms };
secretParams = { ...secretParams, ...updatedSecretParms };
}
const signatureAlg = signatures_1.SIGNATURES[client.metadata.signatureType];
let serverIV;
let clientIV;
const [serverBlock] = getLastBlocks('server', 1);
if (serverBlock && serverBlock.message.type === 'ciphertext') {
serverIV = serverBlock.message.fixedIv;
}
const [clientBlock] = getLastBlocks('client', 1);
if (clientBlock && clientBlock.message.type === 'ciphertext') {
clientIV = clientBlock.message.fixedIv;
}
const transcript = await generateTranscript();
// now that we have the full transcript, we need
// to generate the ZK proofs & send them to the attestor
// to verify & sign our claim
const claimTunnelReq = api_1.ClaimTunnelRequest.create({
request: createTunnelReq,
data: {
provider: name,
parameters: (0, utils_1.canonicalStringify)(params),
context: (0, utils_1.canonicalStringify)(context),
timestampS: timestampS !== null && timestampS !== void 0 ? timestampS : (0, utils_1.unixTimestampSeconds)(),
owner: getAddress(),
},
transcript: transcript,
zkEngine: zkEngine === 'gnark'
? api_1.ZKProofEngine.ZK_ENGINE_GNARK
: api_1.ZKProofEngine.ZK_ENGINE_SNARKJS,
fixedServerIV: serverIV,
fixedClientIV: clientIV,
});
onStep === null || onStep === void 0 ? void 0 : onStep({ name: 'waiting-for-verification' });
const claimTunnelBytes = api_1.ClaimTunnelRequest
.encode(claimTunnelReq).finish();
const requestSignature = await signatureAlg
.sign(claimTunnelBytes, ownerPrivateKey);
claimTunnelReq.signatures = { requestSignature };
const result = await client.rpc('claimTunnel', claimTunnelReq);
logger.info({ success: !!result.claim }, 'recv claim response');
return result;
async function writeRedactedWithKeyUpdate() {
var _a;
let currentIndex = 0;
for (const section of redactions) {
const block = requestData
.slice(currentIndex, section.fromIndex);
if (block.length) {
await writeWithReveal(block, true);
}
const redacted = requestData
.slice(section.fromIndex, section.toIndex);
await writeWithReveal(redacted, false);
currentIndex = section.toIndex;
}
// write if redactions were there
const lastBlockStart = ((_a = redactions === null || redactions === void 0 ? void 0 : redactions[redactions.length - 1]) === null || _a === void 0 ? void 0 : _a.toIndex) || 0;
const block = requestData.slice(lastBlockStart);
if (block.length) {
await writeWithReveal(block, true);
}
}
async function writeRedactedZk() {
let blocksWritten = tunnel.transcript.length;
await tunnel.tls.write(requestData);
blocksWritten = tunnel.transcript.length - blocksWritten;
setRevealOfLastSentBlocks({
type: 'zk',
redactedPlaintext: (0, utils_1.redactSlices)(requestData, redactions)
}, blocksWritten);
}
/**
* Write data to the tunnel, with the option to mark the packet
* as revealable to the attestor or not
*/
async function writeWithReveal(data, reveal) {
// if the reveal state has changed, update the traffic keys
// to not accidentally reveal a packet not meant to be revealed
// and vice versa
if (reveal !== lastMsgRevealed) {
await tunnel.tls.updateTrafficKeys();
}
let blocksWritten = tunnel.transcript.length;
await tunnel.write(data);
blocksWritten = tunnel.transcript.length - blocksWritten;
// now we mark the packet to be revealed to the attestor
setRevealOfLastSentBlocks(reveal ? { type: 'complete' } : undefined, blocksWritten);
lastMsgRevealed = reveal;
}
function setRevealOfLastSentBlocks(reveal, nBlocks = 1) {
const lastBlocks = getLastBlocks('client', nBlocks);
if (!lastBlocks.length) {
return;
}
for (const block of lastBlocks) {
setRevealOfMessage(block.message, reveal);
}
}
function getLastBlocks(sender, nBlocks) {
// set the correct index for the server blocks
const lastBlocks = [];
for (let i = tunnel.transcript.length - 1; i >= 0; i--) {
const block = tunnel.transcript[i];
if (block.sender === sender) {
lastBlocks.push(block);
if (lastBlocks.length === nBlocks) {
break;
}
}
}
return lastBlocks;
}
/**
* Generate transcript with reveal data for the attestor to verify
*/
async function generateTranscript() {
await addServerSideReveals();
const startMs = Date.now();
const revealedMessages = await (0, utils_1.preparePacketsForReveal)(tunnel.transcript, revealMap, {
logger,
cipherSuite: cipherSuite,
onZkProgress(done, total) {
const timeSinceStartMs = Date.now() - startMs;
const timePerBlockMs = timeSinceStartMs / done;
const timeLeftMs = timePerBlockMs * (total - done);
onStep === null || onStep === void 0 ? void 0 : onStep({
name: 'generating-zk-proofs',
proofsDone: done,
proofsTotal: total,
approxTimeLeftS: Math.round(timeLeftMs / 1000),
});
},
...zkOpts,
});
return revealedMessages;
}
/**
* Add reveals for server side blocks, using
* the provider's redaction function if available.
* Otherwise, opts to reveal all server side blocks.
*/
async function addServerSideReveals() {
const allPackets = tunnel.transcript;
let serverPacketsToReveal = 'all';
const packets = [];
const serverBlocks = [];
for (const b of allPackets) {
if (b.message.type !== 'ciphertext'
|| !(0, utils_1.isApplicationData)(b.message, tlsVersion)) {
continue;
}
const plaintext = tlsVersion === 'TLS1_3'
? b.message.plaintext.slice(0, -1)
: b.message.plaintext;
packets.push({
message: plaintext,
sender: b.sender
});
if (b.sender === 'server') {
serverBlocks.push({
plaintext: plaintext,
message: b.message
});
}
}
if (provider.getResponseRedactions) {
serverPacketsToReveal = await (0, utils_1.getBlocksToReveal)(serverBlocks, total => provider.getResponseRedactions({
response: total,
params,
logger,
ctx: config_1.PROVIDER_CTX
}), performOprf);
}
const revealedPackets = packets
.filter(p => p.sender === 'client');
if (serverPacketsToReveal === 'all') {
// reveal all server side blocks
for (const { message, sender } of allPackets) {
if (sender === 'server') {
setRevealOfMessage(message, { type: 'complete' });
}
}
revealedPackets.push(...packets.filter(p => p.sender === 'server'));
}
else {
for (const { block, redactedPlaintext, toprfs } of serverPacketsToReveal) {
setRevealOfMessage(block.message, {
type: 'zk',
redactedPlaintext,
toprfs
});
revealedPackets.push({ sender: 'server', message: redactedPlaintext });
if (updateParametersFromOprfData && toprfs) {
let strParams = (0, utils_1.canonicalStringify)(params);
for (const toprf of toprfs) {
strParams = strParams.replaceAll((0, utils_1.uint8ArrayToStr)(toprf.plaintext), (0, utils_1.binaryHashToStr)(toprf.nullifier, toprf.dataLocation.length));
}
params = JSON.parse(strParams);
}
}
}
await provider.assertValidProviderReceipt({
receipt: revealedPackets,
params: {
...params,
// provide secret params for proper
// request body validation
secretParams,
},
logger,
ctx: config_1.PROVIDER_CTX
});
// reveal all handshake blocks
// so the attestor can verify there was no
// hanky-panky
for (const p of allPackets) {
if (p.message.type !== 'ciphertext') {
continue;
}
// break the moment we hit the first
// application data packet
if ((0, utils_1.isApplicationData)(p.message, tlsVersion)) {
break;
}
setRevealOfMessage(p.message, { type: 'complete' });
}
}
async function performOprf(plaintext) {
var _a;
logger.info({ length: plaintext.length }, 'generating OPRF...');
const oprfOperator = ((_a = zkOpts.oprfOperators) === null || _a === void 0 ? void 0 : _a['chacha20'])
|| (0, utils_1.makeDefaultOPRFOperator)('chacha20', zkEngine, logger);
const reqData = await oprfOperator.generateOPRFRequestData(plaintext, config_1.TOPRF_DOMAIN_SEPARATOR, logger);
const res = await client.rpc('toprf', {
maskedData: reqData.maskedData,
engine: (0, utils_1.getEngineProto)(zkEngine)
});
const nullifier = await oprfOperator.finaliseOPRF(client.initResponse.toprfPublicKey, reqData, [res]);
const data = {
nullifier,
responses: [res],
mask: reqData.mask,
dataLocation: undefined,
plaintext
};
return data;
}
function setRevealOfMessage(message, reveal) {
if (reveal) {
revealMap.set(message, reveal);
return;
}
revealMap.delete(message);
}
function getAddress() {
const { getAddress, getPublicKey } = signatureAlg;
const pubKey = getPublicKey(ownerPrivateKey);
return getAddress(pubKey);
}
}
//# 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