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90 lines
2.5 KiB
JavaScript
90 lines
2.5 KiB
JavaScript
/* Use Nacl for checking signatures of messages
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*/
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var Nacl = require("tweetnacl");
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var RPC = module.exports;
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var pin = function (ctx, cb) { };
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var unpin = function (ctx, cb) { };
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var getHash = function (ctx, cb) { };
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var getTotalSize = function (ctx, cb) { };
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var getFileSize = function (ctx, cb) { };
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var isValidChannel = function (chan) {
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return /^[a-fA-F0-9]/.test(chan);
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};
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var checkSignature = function (signedMsg, publicKey) {
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if (!(signedMsg && publicKey)) { return null; }
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try {
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var signedBuffer = Nacl.util.decodeBase64(signedMsg);
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var pubBuffer = Nacl.util.decodeBase64(publicKey);
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} catch (e) {
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return null;
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}
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var opened = Nacl.sign.open(signedBuffer, pubBuffer);
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if (opened) {
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var decoded = Nacl.util.encodeUTF8(opened);
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try {
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return JSON.parse(decoded);
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} catch (e) { } // fall through to return
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}
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return null;
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};
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RPC.create = function (config, cb) {
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// load pin-store...
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console.log('loading rpc module...');
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var rpc = function (ctx, args, respond) {
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if (args.length < 2) {
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return void respond("INSUFFICIENT_ARGS");
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}
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var signed = args[0];
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var publicKey = args[1];
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var msg = checkSignature(signed, publicKey);
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if (!msg) {
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return void respond("INVALID_SIGNATURE_OR_PUBLIC_KEY");
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}
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if (typeof(msg) !== 'object') {
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return void respond('INVALID_MSG');
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}
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switch (msg[0]) {
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case 'ECHO':
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return void respond(void 0, msg);
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case 'RESET':
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return void respond('NOT_IMPLEMENTED', msg);
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case 'PIN':
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return void respond('NOT_IMPLEMENTED', msg);
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case 'UNPIN':
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return void respond('NOT_IMPLEMENTED', msg);
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case 'GET_HASH':
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return void respond('NOT_IMPLEMENTED', msg);
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case 'GET_TOTAL_SIZE':
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return void respond('NOT_IMPLEMENTED', msg);
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case 'GET_FILE_SIZE':
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if (!isValidChannel(msg[1])) {
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return void respond('INVALID_CHAN');
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}
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return void ctx.store.getChannelSize(msg[1], function (e, size) {
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if (e) { return void respond(e.code); }
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respond(void 0, size);
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});
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default:
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return void respond('UNSUPPORTED_RPC_CALL', msg);
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}
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};
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cb(void 0, rpc);
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};
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