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Просмотр файла: signatureUtils.js
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __values = (this && this.__values) || function(o) {
var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
if (m) return m.call(o);
if (o && typeof o.length === "number") return {
next: function () {
if (o && i >= o.length) o = void 0;
return { value: o && o[i++], done: !o };
}
};
throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.SignatureUtils = exports.guessSigner = exports.verifyEIP712TypedDataSigner = exports.recoverEIP712TypedDataSignerVrs = exports.recoverEIP712TypedDataSignerRsv = exports.parseSignatureWithoutPrefix = exports.parseSignature = exports.verifySignature = exports.signMessageWithoutPrefix = exports.signMessage = exports.signedMessageToPublicKey = exports.LocalSigner = exports.addressToPublicKey = exports.hashMessage = exports.hashMessageWithPrefix = exports.serializeSignature = exports.POP_SIZE = exports.NativeSigner = void 0;
var signatureUtils_1 = require("@celo/base/lib/signatureUtils");
var web3_utils_1 = require("web3-utils");
var address_1 = require("./address");
var sign_typed_data_utils_1 = require("./sign-typed-data-utils");
// Exports moved to @celo/base, forwarding them
// here for backwards compatibility
var signatureUtils_2 = require("@celo/base/lib/signatureUtils");
Object.defineProperty(exports, "NativeSigner", { enumerable: true, get: function () { return signatureUtils_2.NativeSigner; } });
Object.defineProperty(exports, "POP_SIZE", { enumerable: true, get: function () { return signatureUtils_2.POP_SIZE; } });
Object.defineProperty(exports, "serializeSignature", { enumerable: true, get: function () { return signatureUtils_2.serializeSignature; } });
var ethjsutil = require('ethereumjs-util');
// If messages is a hex, the length of it should be the number of bytes
function messageLength(message) {
if ((0, web3_utils_1.isHexStrict)(message)) {
return (message.length - 2) / 2;
}
return message.length;
}
// Ethereum has a special signature format that requires a prefix
// https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign
function hashMessageWithPrefix(message) {
var prefix = '\x19Ethereum Signed Message:\n' + messageLength(message);
return (0, web3_utils_1.soliditySha3)(prefix, message);
}
exports.hashMessageWithPrefix = hashMessageWithPrefix;
function hashMessage(message) {
return (0, web3_utils_1.soliditySha3)({ type: 'string', value: message });
}
exports.hashMessage = hashMessage;
function addressToPublicKey(signer, signFn) {
return __awaiter(this, void 0, void 0, function () {
var msg, data, sig, rawsig, prefixedMsg, pubKey, computedAddr;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
msg = Buffer.from('dummy_msg_data');
data = '0x' + msg.toString('hex');
return [4 /*yield*/, signFn(data, signer)];
case 1:
sig = _a.sent();
rawsig = ethjsutil.fromRpcSig(sig);
prefixedMsg = hashMessageWithPrefix(data);
pubKey = ethjsutil.ecrecover(Buffer.from(prefixedMsg.slice(2), 'hex'), rawsig.v, rawsig.r, rawsig.s);
computedAddr = ethjsutil.pubToAddress(pubKey).toString('hex');
if (!(0, address_1.eqAddress)(computedAddr, signer)) {
throw new Error('computed address !== signer');
}
return [2 /*return*/, '0x' + pubKey.toString('hex')];
}
});
});
}
exports.addressToPublicKey = addressToPublicKey;
function LocalSigner(privateKey) {
var _this = this;
return {
sign: function (message) { return __awaiter(_this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, Promise.resolve((0, signatureUtils_1.serializeSignature)(signMessage(message, privateKey, (0, address_1.privateKeyToAddress)(privateKey))))];
});
}); },
};
}
exports.LocalSigner = LocalSigner;
function signedMessageToPublicKey(message, v, r, s) {
var pubKeyBuf = ethjsutil.ecrecover(Buffer.from(message.slice(2), 'hex'), v, Buffer.from(r.slice(2), 'hex'), Buffer.from(s.slice(2), 'hex'));
return '0x' + pubKeyBuf.toString('hex');
}
exports.signedMessageToPublicKey = signedMessageToPublicKey;
function signMessage(message, privateKey, address) {
return signMessageWithoutPrefix(hashMessageWithPrefix(message), (0, address_1.ensureLeading0x)(privateKey), address);
}
exports.signMessage = signMessage;
function signMessageWithoutPrefix(messageHash, privateKey, address) {
var publicKey = ethjsutil.privateToPublic(ethjsutil.toBuffer(privateKey));
var derivedAddress = ethjsutil.bufferToHex(ethjsutil.pubToAddress(publicKey));
if (derivedAddress.toLowerCase() !== address.toLowerCase()) {
throw new Error('Provided private key does not match address of intended signer');
}
var _a = ethjsutil.ecsign(ethjsutil.toBuffer(messageHash), ethjsutil.toBuffer(privateKey)), r = _a.r, s = _a.s, v = _a.v;
if (!isValidSignature(address, messageHash, v, ethjsutil.bufferToHex(r), ethjsutil.bufferToHex(s))) {
throw new Error('Unable to validate signature');
}
return { v: v, r: ethjsutil.bufferToHex(r), s: ethjsutil.bufferToHex(s) };
}
exports.signMessageWithoutPrefix = signMessageWithoutPrefix;
function verifySignature(message, signature, signer) {
try {
parseSignature(message, signature, signer);
return true;
}
catch (error) {
return false;
}
}
exports.verifySignature = verifySignature;
function parseSignature(message, signature, signer) {
return parseSignatureWithoutPrefix(hashMessageWithPrefix(message), signature, signer);
}
exports.parseSignature = parseSignature;
function parseSignatureWithoutPrefix(messageHash, signature, signer) {
var _a;
var _b = parseSignatureAsRsv(signature.slice(2)), r = _b.r, s = _b.s, v = _b.v;
if (isValidSignature(signer, messageHash, v, r, s)) {
return { v: v, r: r, s: s };
}
;
(_a = parseSignatureAsVrs(signature.slice(2)), r = _a.r, s = _a.s, v = _a.v);
if (isValidSignature(signer, messageHash, v, r, s)) {
return { v: v, r: r, s: s };
}
throw new Error("Unable to parse signature (expected signer ".concat(signer, ")"));
}
exports.parseSignatureWithoutPrefix = parseSignatureWithoutPrefix;
function recoverEIP712TypedDataSigner(typedData, signature, parseFunction) {
var dataBuff = (0, sign_typed_data_utils_1.generateTypedDataHash)(typedData);
var _a = parseFunction((0, address_1.trimLeading0x)(signature)), r = _a.r, s = _a.s, v = _a.v;
var publicKey = ethjsutil.ecrecover(ethjsutil.toBuffer(dataBuff), v, ethjsutil.toBuffer(r), ethjsutil.toBuffer(s));
// TODO test error handling on this
return ethjsutil.bufferToHex(ethjsutil.pubToAddress(publicKey));
}
/**
* Recover signer from RSV-serialized signature over signed typed data.
* @param typedData EIP712 typed data
* @param signature RSV signature of signed type data by signer
* @returns string signer, or throws error if parsing fails
*/
function recoverEIP712TypedDataSignerRsv(typedData, signature) {
return recoverEIP712TypedDataSigner(typedData, signature, parseSignatureAsRsv);
}
exports.recoverEIP712TypedDataSignerRsv = recoverEIP712TypedDataSignerRsv;
/**
* Recover signer from VRS-serialized signature over signed typed data.
* @param typedData EIP712 typed data
* @param signature VRS signature of signed type data by signer
* @returns string signer, or throws error if parsing fails
*/
function recoverEIP712TypedDataSignerVrs(typedData, signature) {
return recoverEIP712TypedDataSigner(typedData, signature, parseSignatureAsVrs);
}
exports.recoverEIP712TypedDataSignerVrs = recoverEIP712TypedDataSignerVrs;
/**
* @param typedData EIP712 typed data
* @param signature VRS or SRV signature of `typedData` by `signer`
* @param signer address to verify signed the `typedData`
* @returns boolean, true if `signer` is a possible signer of `signature`
*/
function verifyEIP712TypedDataSigner(typedData, signature, signer) {
var e_1, _a;
try {
for (var _b = __values([recoverEIP712TypedDataSignerVrs, recoverEIP712TypedDataSignerRsv]), _c = _b.next(); !_c.done; _c = _b.next()) {
var recover = _c.value;
try {
if ((0, address_1.eqAddress)(recover(typedData, signature), signer)) {
return true;
}
}
catch (e) {
// try both serialization formats before failing to verify
}
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_1) throw e_1.error; }
}
return false;
}
exports.verifyEIP712TypedDataSigner = verifyEIP712TypedDataSigner;
function guessSigner(message, signature) {
var messageHash = hashMessageWithPrefix(message);
var _a = parseSignatureAsRsv(signature.slice(2)), r = _a.r, s = _a.s, v = _a.v;
var publicKey = ethjsutil.ecrecover(ethjsutil.toBuffer(messageHash), v, ethjsutil.toBuffer(r), ethjsutil.toBuffer(s));
return ethjsutil.bufferToHex(ethjsutil.pubToAddress(publicKey));
}
exports.guessSigner = guessSigner;
function parseSignatureAsVrs(signature) {
var v = parseInt(signature.slice(0, 2), 16);
var r = "0x".concat(signature.slice(2, 66));
var s = "0x".concat(signature.slice(66, 130));
if (v < 27) {
v += 27;
}
return { v: v, r: r, s: s };
}
function parseSignatureAsRsv(signature) {
var r = "0x".concat(signature.slice(0, 64));
var s = "0x".concat(signature.slice(64, 128));
var v = parseInt(signature.slice(128, 130), 16);
if (v < 27) {
v += 27;
}
return { r: r, s: s, v: v };
}
function isValidSignature(signer, message, v, r, s) {
try {
var publicKey = ethjsutil.ecrecover(ethjsutil.toBuffer(message), v, ethjsutil.toBuffer(r), ethjsutil.toBuffer(s));
var retrievedAddress = ethjsutil.bufferToHex(ethjsutil.pubToAddress(publicKey));
return (0, address_1.eqAddress)(retrievedAddress, signer);
}
catch (err) {
return false;
}
}
exports.SignatureUtils = {
NativeSigner: signatureUtils_1.NativeSigner,
LocalSigner: LocalSigner,
signMessage: signMessage,
signMessageWithoutPrefix: signMessageWithoutPrefix,
parseSignature: parseSignature,
parseSignatureWithoutPrefix: parseSignatureWithoutPrefix,
serializeSignature: signatureUtils_1.serializeSignature,
recoverEIP712TypedDataSignerRsv: recoverEIP712TypedDataSignerRsv,
recoverEIP712TypedDataSignerVrs: recoverEIP712TypedDataSignerVrs,
verifyEIP712TypedDataSigner: verifyEIP712TypedDataSigner,
};
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