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/*
This file is part of GNU Taler
(C) 2021 Taler Systems S.A.
GNU 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.
GNU 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
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* Imports.
*/
import {
buildCodecForObject,
Codec,
codecForAny,
codecForExchangeKeysJson,
codecForKeysManagementResponse,
codecForList,
codecForString,
Configuration,
} from "@gnu-taler/taler-util";
import {
decodeCrock,
NodeHttpLib,
readSuccessResponseJsonOrThrow,
} from "@gnu-taler/taler-wallet-core";
import { URL } from "url";
import * as fs from "fs";
import * as path from "path";
import { ChildProcess, spawn } from "child_process";
interface BasicConf {
mainCurrency: string;
}
interface PubkeyConf {
masterPublicKey: string;
}
const httpLib = new NodeHttpLib();
interface ShellResult {
stdout: string;
stderr: string;
status: number;
}
/**
* Run a shell command, return stdout.
*/
export async function sh(
command: string,
env: { [index: string]: string | undefined } = process.env,
): Promise<ShellResult> {
return new Promise((resolve, reject) => {
const stdoutChunks: Buffer[] = [];
const stderrChunks: Buffer[] = [];
const proc = spawn(command, {
stdio: ["inherit", "pipe", "pipe"],
shell: true,
env: env,
});
proc.stdout.on("data", (x) => {
if (x instanceof Buffer) {
stdoutChunks.push(x);
} else {
throw Error("unexpected data chunk type");
}
});
proc.stderr.on("data", (x) => {
if (x instanceof Buffer) {
stderrChunks.push(x);
} else {
throw Error("unexpected data chunk type");
}
});
proc.on("exit", (code, signal) => {
console.log(`child process exited (${code} / ${signal})`);
const bOut = Buffer.concat(stdoutChunks).toString("utf-8");
const bErr = Buffer.concat(stderrChunks).toString("utf-8");
resolve({
status: code ?? -1,
stderr: bErr,
stdout: bOut,
});
});
proc.on("error", () => {
reject(Error("Child process had error"));
});
});
}
function checkBasicConf(cfg: Configuration): BasicConf {
const currencyEntry = cfg.getString("taler", "currency");
let mainCurrency: string | undefined;
if (!currencyEntry.value) {
console.log("error: currency not defined in section TALER option CURRENCY");
process.exit(1);
} else {
mainCurrency = currencyEntry.value.toUpperCase();
}
if (mainCurrency === "KUDOS") {
console.log(
"warning: section TALER option CURRENCY contains toy currency value KUDOS",
);
}
const roundUnit = cfg.getAmount("taler", "currency_round_unit");
if (!roundUnit.isDefined) {
console.log(
"error: configuration incomplete, section TALER option CURRENCY_ROUND_UNIT missing",
);
}
return { mainCurrency };
}
function checkCoinConfig(cfg: Configuration, basic: BasicConf): void {
const coinPrefix = "coin_";
let numCoins = 0;
for (const secName of cfg.getSectionNames()) {
if (!secName.startsWith(coinPrefix)) {
continue;
}
numCoins++;
// FIXME: check that section is well-formed
}
console.log(
"error: no coin denomination configured, please configure [coin_*] sections",
);
}
function checkWireConfig(cfg: Configuration): void {
const accountPrefix = "exchange-account-";
const accountCredentialsPrefix = "exchange-accountcredentials-";
let accounts = new Set<string>();
let credentials = new Set<string>();
for (const secName of cfg.getSectionNames()) {
if (secName.startsWith(accountPrefix)) {
accounts.add(secName.slice(accountPrefix.length));
// FIXME: check settings
}
if (secName.startsWith(accountCredentialsPrefix)) {
credentials.add(secName.slice(accountCredentialsPrefix.length));
// FIXME: check settings
}
}
for (const acc of accounts) {
if (!credentials.has(acc)) {
console.log(
`warning: no credentials configured for exchange-account-${acc}`,
);
}
}
// FIXME: now try to use taler-exchange-wire-gateway-client to connect!
// FIXME: run wirewatch in test mode here?
// FIXME: run transfer in test mode here?
}
function checkAggregatorConfig(cfg: Configuration) {
// FIXME: run aggregator in test mode here
}
function checkCloserConfig(cfg: Configuration) {
// FIXME: run closer in test mode here
}
function checkMasterPublicKeyConfig(cfg: Configuration): PubkeyConf {
const pub = cfg.getString("exchange", "master_public_key");
if (!pub.isDefined) {
console.log("error: Master public key is not set.");
process.exit(1);
}
const pubDecoded = decodeCrock(pub.required());
if (pubDecoded.length != 32) {
console.log("error: invalid master public key");
process.exit(1);
}
return {
masterPublicKey: pub.required(),
};
}
export async function checkExchangeHttpd(
cfg: Configuration,
pubConf: PubkeyConf,
): Promise<void> {
const baseUrlEntry = cfg.getString("exchange", "base_url");
if (!baseUrlEntry.isDefined) {
console.log(
"error: configuration needs to specify section EXCHANGE option BASE_URL",
);
process.exit(1);
}
const baseUrl = baseUrlEntry.required();
if (!baseUrl.startsWith("http")) {
console.log(
"error: section EXCHANGE option BASE_URL needs to be an http or https URL",
);
process.exit(1);
}
if (!baseUrl.endsWith("/")) {
console.log(
"error: section EXCHANGE option BASE_URL needs to end with a slash",
);
process.exit(1);
}
if (!baseUrl.startsWith("https://")) {
console.log(
"warning: section EXCHANGE option BASE_URL: it is recommended to serve the exchange via HTTPS",
);
process.exit(1);
}
{
const mgmtUrl = new URL("management/keys", baseUrl);
const resp = await httpLib.get(mgmtUrl.href);
const futureKeys = await readSuccessResponseJsonOrThrow(
resp,
codecForKeysManagementResponse(),
);
if (futureKeys.future_denoms.length > 0) {
console.log(
`warning: exchange has denomination keys that need to be signed by the offline signing procedure`,
);
}
if (futureKeys.future_signkeys.length > 0) {
console.log(
`warning: exchange has signing keys that need to be signed by the offline signing procedure`,
);
}
}
{
const keysUrl = new URL("keys", baseUrl);
const resp = await httpLib.get(keysUrl.href);
const keys = await readSuccessResponseJsonOrThrow(
resp,
codecForExchangeKeysJson(),
);
}
}
/**
* Do some basic checks in the configuration of a Taler deployment.
*/
export async function lintExchangeDeployment(): Promise<void> {
if (process.getuid() != 0) {
console.log(
"warning: the exchange deployment linter is designed to be run as root",
);
}
const cfg = Configuration.load();
const basic = checkBasicConf(cfg);
checkCoinConfig(cfg, basic);
checkWireConfig(cfg);
checkAggregatorConfig(cfg);
checkCloserConfig(cfg);
const pubConf = checkMasterPublicKeyConfig(cfg);
await checkExchangeHttpd(cfg, pubConf);
}
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