224 lines
7.8 KiB
TypeScript
224 lines
7.8 KiB
TypeScript
/*
|
|
This file is part of TALER
|
|
(C) 2016 GNUnet e.V.
|
|
|
|
TALER is free software; you can redistribute it and/or modify it under the
|
|
terms of the GNU General Public License as published by the Free Software
|
|
Foundation; either version 3, or (at your option) any later version.
|
|
|
|
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
|
|
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License along with
|
|
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
|
|
*/
|
|
|
|
/**
|
|
* Web worker for crypto operations.
|
|
* @author Florian Dold
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
import * as native from "./emscriptif";
|
|
import {PreCoin, Reserve, PayCoinInfo} from "./types";
|
|
import create = chrome.alarms.create;
|
|
import {Offer} from "./wallet";
|
|
import {CoinWithDenom} from "./wallet";
|
|
import {CoinPaySig} from "./types";
|
|
import {Denomination} from "./types";
|
|
|
|
|
|
export function main(worker: Worker) {
|
|
worker.onmessage = (msg: MessageEvent) => {
|
|
console.log("got data", msg.data);
|
|
if (!Array.isArray(msg.data.args)) {
|
|
console.error("args must be array");
|
|
return;
|
|
}
|
|
if (typeof msg.data.id != "number") {
|
|
console.error("RPC id must be number");
|
|
}
|
|
if (typeof msg.data.operation != "string") {
|
|
console.error("RPC operation must be string");
|
|
}
|
|
let f = RpcFunctions[msg.data.operation];
|
|
if (!f) {
|
|
console.error(`unknown operation: '${msg.data.operation}'`);
|
|
return;
|
|
}
|
|
let res = f(...msg.data.args);
|
|
worker.postMessage({result: res, id: msg.data.id});
|
|
}
|
|
}
|
|
|
|
console.log("hello, this is the crypto lib");
|
|
|
|
namespace RpcFunctions {
|
|
|
|
/**
|
|
* Create a pre-coin of the given denomination to be withdrawn from then given
|
|
* reserve.
|
|
*/
|
|
export function createPreCoin(denom: Denomination,
|
|
reserve: Reserve): PreCoin {
|
|
let reservePriv = new native.EddsaPrivateKey();
|
|
reservePriv.loadCrock(reserve.reserve_priv);
|
|
let reservePub = new native.EddsaPublicKey();
|
|
reservePub.loadCrock(reserve.reserve_pub);
|
|
let denomPub = native.RsaPublicKey.fromCrock(denom.denom_pub);
|
|
let coinPriv = native.EddsaPrivateKey.create();
|
|
let coinPub = coinPriv.getPublicKey();
|
|
let blindingFactor = native.RsaBlindingKeySecret.create();
|
|
let pubHash: native.HashCode = coinPub.hash();
|
|
let ev: native.ByteArray = native.rsaBlind(pubHash,
|
|
blindingFactor,
|
|
denomPub);
|
|
|
|
if (!denom.fee_withdraw) {
|
|
throw Error("Field fee_withdraw missing");
|
|
}
|
|
|
|
let amountWithFee = new native.Amount(denom.value);
|
|
amountWithFee.add(new native.Amount(denom.fee_withdraw));
|
|
let withdrawFee = new native.Amount(denom.fee_withdraw);
|
|
|
|
// Signature
|
|
let withdrawRequest = new native.WithdrawRequestPS({
|
|
reserve_pub: reservePub,
|
|
amount_with_fee: amountWithFee.toNbo(),
|
|
withdraw_fee: withdrawFee.toNbo(),
|
|
h_denomination_pub: denomPub.encode().hash(),
|
|
h_coin_envelope: ev.hash()
|
|
});
|
|
|
|
var sig = native.eddsaSign(withdrawRequest.toPurpose(), reservePriv);
|
|
|
|
let preCoin: PreCoin = {
|
|
reservePub: reservePub.toCrock(),
|
|
blindingKey: blindingFactor.toCrock(),
|
|
coinPub: coinPub.toCrock(),
|
|
coinPriv: coinPriv.toCrock(),
|
|
denomPub: denomPub.encode().toCrock(),
|
|
exchangeBaseUrl: reserve.exchange_base_url,
|
|
withdrawSig: sig.toCrock(),
|
|
coinEv: ev.toCrock(),
|
|
coinValue: denom.value
|
|
};
|
|
return preCoin;
|
|
}
|
|
|
|
|
|
export function isValidDenom(denom: Denomination,
|
|
masterPub: string): boolean {
|
|
let p = new native.DenominationKeyValidityPS({
|
|
master: native.EddsaPublicKey.fromCrock(masterPub),
|
|
denom_hash: native.RsaPublicKey.fromCrock(denom.denom_pub)
|
|
.encode()
|
|
.hash(),
|
|
expire_legal: native.AbsoluteTimeNbo.fromTalerString(denom.stamp_expire_legal),
|
|
expire_spend: native.AbsoluteTimeNbo.fromTalerString(denom.stamp_expire_deposit),
|
|
expire_withdraw: native.AbsoluteTimeNbo.fromTalerString(denom.stamp_expire_withdraw),
|
|
start: native.AbsoluteTimeNbo.fromTalerString(denom.stamp_start),
|
|
value: (new native.Amount(denom.value)).toNbo(),
|
|
fee_deposit: (new native.Amount(denom.fee_deposit)).toNbo(),
|
|
fee_refresh: (new native.Amount(denom.fee_refresh)).toNbo(),
|
|
fee_withdraw: (new native.Amount(denom.fee_withdraw)).toNbo(),
|
|
fee_refund: (new native.Amount(denom.fee_refund)).toNbo(),
|
|
});
|
|
|
|
let nativeSig = new native.EddsaSignature();
|
|
nativeSig.loadCrock(denom.master_sig);
|
|
|
|
let nativePub = native.EddsaPublicKey.fromCrock(masterPub);
|
|
|
|
return native.eddsaVerify(native.SignaturePurpose.MASTER_DENOMINATION_KEY_VALIDITY,
|
|
p.toPurpose(),
|
|
nativeSig,
|
|
nativePub);
|
|
|
|
}
|
|
|
|
|
|
export function hashRsaPub(rsaPub: string): string {
|
|
return native.RsaPublicKey.fromCrock(rsaPub)
|
|
.encode()
|
|
.hash()
|
|
.toCrock();
|
|
}
|
|
|
|
|
|
export function createEddsaKeypair(): {priv: string, pub: string} {
|
|
const priv = native.EddsaPrivateKey.create();
|
|
const pub = priv.getPublicKey();
|
|
return {priv: priv.toCrock(), pub: pub.toCrock()};
|
|
}
|
|
|
|
|
|
export function rsaUnblind(sig, bk, pk): string {
|
|
let denomSig = native.rsaUnblind(native.RsaSignature.fromCrock(sig),
|
|
native.RsaBlindingKeySecret.fromCrock(bk),
|
|
native.RsaPublicKey.fromCrock(pk));
|
|
return denomSig.encode().toCrock()
|
|
}
|
|
|
|
|
|
/**
|
|
* Generate updated coins (to store in the database)
|
|
* and deposit permissions for each given coin.
|
|
*/
|
|
export function signDeposit(offer: Offer,
|
|
cds: CoinWithDenom[]): PayCoinInfo {
|
|
let ret = [];
|
|
let amountSpent = native.Amount.getZero(cds[0].coin.currentAmount.currency);
|
|
let amountRemaining = new native.Amount(offer.contract.amount);
|
|
for (let cd of cds) {
|
|
let coinSpend;
|
|
|
|
if (amountRemaining.value == 0 && amountRemaining.fraction == 0) {
|
|
break;
|
|
}
|
|
|
|
if (amountRemaining.cmp(new native.Amount(cd.coin.currentAmount)) < 0) {
|
|
coinSpend = new native.Amount(amountRemaining.toJson());
|
|
} else {
|
|
coinSpend = new native.Amount(cd.coin.currentAmount);
|
|
}
|
|
|
|
amountSpent.add(coinSpend);
|
|
amountRemaining.sub(coinSpend);
|
|
|
|
let newAmount = new native.Amount(cd.coin.currentAmount);
|
|
newAmount.sub(coinSpend);
|
|
cd.coin.currentAmount = newAmount.toJson();
|
|
|
|
let d = new native.DepositRequestPS({
|
|
h_contract: native.HashCode.fromCrock(offer.H_contract),
|
|
h_wire: native.HashCode.fromCrock(offer.contract.H_wire),
|
|
amount_with_fee: coinSpend.toNbo(),
|
|
coin_pub: native.EddsaPublicKey.fromCrock(cd.coin.coinPub),
|
|
deposit_fee: new native.Amount(cd.denom.fee_deposit).toNbo(),
|
|
merchant: native.EddsaPublicKey.fromCrock(offer.contract.merchant_pub),
|
|
refund_deadline: native.AbsoluteTimeNbo.fromTalerString(offer.contract.refund_deadline),
|
|
timestamp: native.AbsoluteTimeNbo.fromTalerString(offer.contract.timestamp),
|
|
transaction_id: native.UInt64.fromNumber(offer.contract.transaction_id),
|
|
});
|
|
|
|
let coinSig = native.eddsaSign(d.toPurpose(),
|
|
native.EddsaPrivateKey.fromCrock(cd.coin.coinPriv))
|
|
.toCrock();
|
|
|
|
let s: CoinPaySig = {
|
|
coin_sig: coinSig,
|
|
coin_pub: cd.coin.coinPub,
|
|
ub_sig: cd.coin.denomSig,
|
|
denom_pub: cd.coin.denomPub,
|
|
f: coinSpend.toJson(),
|
|
};
|
|
ret.push({sig: s, updatedCoin: cd.coin});
|
|
}
|
|
return ret;
|
|
}
|
|
}
|