113 lines
2.6 KiB
JavaScript
113 lines
2.6 KiB
JavaScript
/* jshint esversion: 6 */
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/* global process */
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const Nacl = require('tweetnacl/nacl-fast');
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const COMMANDS = {};
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COMMANDS.INLINE = function (data, cb) {
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var signedMsg;
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try {
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signedMsg = Nacl.util.decodeBase64(data.msg);
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} catch (e) {
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return void cb('E_BAD_MESSAGE');
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}
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var validateKey;
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try {
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validateKey = Nacl.util.decodeBase64(data.key);
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} catch (e) {
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return void cb("E_BADKEY");
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}
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// validate the message
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const validated = Nacl.sign.open(signedMsg, validateKey);
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if (!validated) {
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return void cb("FAILED");
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}
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cb();
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};
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const checkDetachedSignature = function (signedMsg, signature, publicKey) {
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if (!(signedMsg && publicKey)) { return false; }
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var signedBuffer;
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var pubBuffer;
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var signatureBuffer;
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try {
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signedBuffer = Nacl.util.decodeUTF8(signedMsg);
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} catch (e) {
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throw new Error("INVALID_SIGNED_BUFFER");
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}
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try {
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pubBuffer = Nacl.util.decodeBase64(publicKey);
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} catch (e) {
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throw new Error("INVALID_PUBLIC_KEY");
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}
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try {
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signatureBuffer = Nacl.util.decodeBase64(signature);
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} catch (e) {
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throw new Error("INVALID_SIGNATURE");
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}
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if (pubBuffer.length !== 32) {
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throw new Error("INVALID_PUBLIC_KEY_LENGTH");
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}
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if (signatureBuffer.length !== 64) {
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throw new Error("INVALID_SIGNATURE_LENGTH");
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}
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if (Nacl.sign.detached.verify(signedBuffer, signatureBuffer, pubBuffer) !== true) {
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throw new Error("FAILED");
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}
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};
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COMMANDS.DETACHED = function (data, cb) {
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try {
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checkDetachedSignature(data.msg, data.sig, data.key);
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} catch (err) {
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return void cb(err && err.message);
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}
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cb();
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};
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COMMANDS.HASH_CHANNEL_LIST = function (data, cb) {
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var channels = data.channels;
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if (!Array.isArray(channels)) { return void cb('INVALID_CHANNEL_LIST'); }
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var uniques = [];
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channels.forEach(function (a) {
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if (uniques.indexOf(a) === -1) { uniques.push(a); }
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});
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uniques.sort();
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var hash = Nacl.util.encodeBase64(Nacl.hash(Nacl
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.util.decodeUTF8(JSON.stringify(uniques))));
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cb(void 0, hash);
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};
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process.on('message', function (data) {
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if (!data || !data.txid) {
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return void process.send({
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error:'E_INVAL'
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});
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}
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const cb = function (err, value) {
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process.send({
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txid: data.txid,
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error: err,
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value: value,
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});
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};
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const command = COMMANDS[data.command];
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if (typeof(command) !== 'function') {
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return void cb("E_BAD_COMMAND");
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}
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command(data, cb);
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});
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