322 lines
12 KiB
JavaScript
322 lines
12 KiB
JavaScript
define([
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'/common/common-util.js',
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'/common/common-interface.js',
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'/bower_components/chainpad-crypto/crypto.js',
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'/bower_components/tweetnacl/nacl-fast.min.js'
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], function (Util, UI, Crypto) {
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var Nacl = window.nacl;
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var Hash = {};
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var uint8ArrayToHex = Util.uint8ArrayToHex;
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var hexToBase64 = Util.hexToBase64;
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var base64ToHex = Util.base64ToHex;
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// This implementation must match that on the server
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// it's used for a checksum
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Hash.hashChannelList = function (list) {
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return Nacl.util.encodeBase64(Nacl.hash(Nacl.util
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.decodeUTF8(JSON.stringify(list))));
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};
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var getEditHashFromKeys = Hash.getEditHashFromKeys = function (chanKey, keys) {
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if (typeof keys === 'string') {
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return chanKey + keys;
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}
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if (!keys.editKeyStr) { return; }
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return '/1/edit/' + hexToBase64(chanKey) + '/'+Crypto.b64RemoveSlashes(keys.editKeyStr)+'/';
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};
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var getViewHashFromKeys = Hash.getViewHashFromKeys = function (chanKey, keys) {
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if (typeof keys === 'string') {
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return;
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}
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return '/1/view/' + hexToBase64(chanKey) + '/'+Crypto.b64RemoveSlashes(keys.viewKeyStr)+'/';
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};
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var getFileHashFromKeys = Hash.getFileHashFromKeys = function (fileKey, cryptKey) {
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return '/1/' + hexToBase64(fileKey) + '/' + Crypto.b64RemoveSlashes(cryptKey) + '/';
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};
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Hash.getUserHrefFromKeys = function (username, pubkey) {
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return window.location.origin + '/user/#/1/' + username + '/' + pubkey.replace(/\//g, '-');
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};
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var fixDuplicateSlashes = function (s) {
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return s.replace(/\/+/g, '/');
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};
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/*
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Version 0
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/pad/#67b8385b07352be53e40746d2be6ccd7XAYSuJYYqa9NfmInyHci7LNy
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Version 1
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/code/#/1/edit/3Ujt4F2Sjnjbis6CoYWpoQ/usn4+9CqVja8Q7RZOGTfRgqI
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*/
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var parseTypeHash = Hash.parseTypeHash = function (type, hash) {
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if (!hash) { return; }
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var parsed = {};
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var hashArr = fixDuplicateSlashes(hash).split('/');
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if (['media', 'file', 'user'].indexOf(type) === -1) {
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parsed.type = 'pad';
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if (hash.slice(0,1) !== '/' && hash.length >= 56) {
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// Old hash
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parsed.channel = hash.slice(0, 32);
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parsed.key = hash.slice(32, 56);
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parsed.version = 0;
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return parsed;
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}
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if (hashArr[1] && hashArr[1] === '1') {
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parsed.version = 1;
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parsed.mode = hashArr[2];
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parsed.channel = hashArr[3];
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parsed.key = hashArr[4].replace(/-/g, '/');
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parsed.present = typeof(hashArr[5]) === "string" && hashArr[5] === 'present';
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return parsed;
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}
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return parsed;
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}
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if (['media', 'file'].indexOf(type) !== -1) {
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parsed.type = 'file';
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if (hashArr[1] && hashArr[1] === '1') {
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parsed.version = 1;
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parsed.channel = hashArr[2].replace(/-/g, '/');
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parsed.key = hashArr[3].replace(/-/g, '/');
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return parsed;
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}
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return parsed;
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}
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if (['user'].indexOf(type) !== -1) {
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parsed.type = 'user';
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if (hashArr[1] && hashArr[1] === '1') {
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parsed.version = 1;
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parsed.user = hashArr[2];
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parsed.pubkey = hashArr[3].replace(/-/g, '/');
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return parsed;
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}
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return parsed;
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}
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return;
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};
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var parsePadUrl = Hash.parsePadUrl = function (href) {
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var patt = /^https*:\/\/([^\/]*)\/(.*?)\//i;
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var ret = {};
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if (!href) { return ret; }
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if (href.slice(-1) !== '/') { href += '/'; }
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if (!/^https*:\/\//.test(href)) {
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var idx = href.indexOf('/#');
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ret.type = href.slice(1, idx);
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ret.hash = href.slice(idx + 2);
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ret.hashData = parseTypeHash(ret.type, ret.hash);
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return ret;
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}
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href.replace(patt, function (a, domain, type) {
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ret.domain = domain;
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ret.type = type;
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return '';
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});
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var idx = href.indexOf('/#');
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ret.hash = href.slice(idx + 2);
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ret.hashData = parseTypeHash(ret.type, ret.hash);
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return ret;
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};
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var getRelativeHref = Hash.getRelativeHref = function (href) {
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if (!href) { return; }
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if (href.indexOf('#') === -1) { return; }
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var parsed = parsePadUrl(href);
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return '/' + parsed.type + '/#' + parsed.hash;
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};
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/*
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* Returns all needed keys for a realtime channel
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* - no argument: use the URL hash or create one if it doesn't exist
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* - secretHash provided: use secretHash to find the keys
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*/
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Hash.getSecrets = function (type, secretHash) {
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var secret = {};
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var generate = function () {
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secret.keys = Crypto.createEditCryptor();
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secret.key = Crypto.createEditCryptor().editKeyStr;
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};
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if (!secretHash && !/#/.test(window.location.href)) {
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generate();
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return secret;
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} else {
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var parsed;
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var hash;
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if (secretHash) {
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if (!type) { throw new Error("getSecrets with a hash requires a type parameter"); }
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parsed = parseTypeHash(type, secretHash);
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hash = secretHash;
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} else {
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var pHref = parsePadUrl(window.location.href);
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parsed = pHref.hashData;
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hash = pHref.hash;
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}
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//var parsed = parsePadUrl(window.location.href);
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//var hash = secretHash || window.location.hash.slice(1);
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if (hash.length === 0) {
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generate();
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return secret;
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}
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// old hash system : #{hexChanKey}{cryptKey}
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// new hash system : #/{hashVersion}/{b64ChanKey}/{cryptKey}
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if (parsed.version === 0) {
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// Old hash
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secret.channel = parsed.channel;
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secret.key = parsed.key;
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}
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else if (parsed.version === 1) {
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// New hash
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if (parsed.type === "pad") {
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secret.channel = base64ToHex(parsed.channel);
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if (parsed.mode === 'edit') {
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secret.keys = Crypto.createEditCryptor(parsed.key);
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secret.key = secret.keys.editKeyStr;
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if (secret.channel.length !== 32 || secret.key.length !== 24) {
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UI.alert("The channel key and/or the encryption key is invalid");
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throw new Error("The channel key and/or the encryption key is invalid");
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}
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}
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else if (parsed.mode === 'view') {
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secret.keys = Crypto.createViewCryptor(parsed.key);
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if (secret.channel.length !== 32) {
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UI.alert("The channel key is invalid");
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throw new Error("The channel key is invalid");
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}
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}
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} else if (parsed.type === "file") {
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// version 2 hashes are to be used for encrypted blobs
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secret.channel = parsed.channel;
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secret.keys = { fileKeyStr: parsed.key };
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} else if (parsed.type === "user") {
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// version 2 hashes are to be used for encrypted blobs
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throw new Error("User hashes can't be opened (yet)");
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}
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}
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}
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return secret;
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};
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Hash.getHashes = function (channel, secret) {
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var hashes = {};
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if (secret.keys.editKeyStr) {
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hashes.editHash = getEditHashFromKeys(channel, secret.keys);
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}
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if (secret.keys.viewKeyStr) {
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hashes.viewHash = getViewHashFromKeys(channel, secret.keys);
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}
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if (secret.keys.fileKeyStr) {
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hashes.fileHash = getFileHashFromKeys(channel, secret.keys.fileKeyStr);
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}
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return hashes;
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};
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var createChannelId = Hash.createChannelId = function () {
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var id = uint8ArrayToHex(Crypto.Nacl.randomBytes(16));
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if (id.length !== 32 || /[^a-f0-9]/.test(id)) {
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throw new Error('channel ids must consist of 32 hex characters');
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}
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return id;
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};
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Hash.createRandomHash = function () {
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// 16 byte channel Id
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var channelId = Util.hexToBase64(createChannelId());
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// 18 byte encryption key
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var key = Crypto.b64RemoveSlashes(Crypto.rand64(18));
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return '/1/edit/' + [channelId, key].join('/') + '/';
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};
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// STORAGE
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Hash.findWeaker = function (href, recents) {
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var rHref = href || getRelativeHref(window.location.href);
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var parsed = parsePadUrl(rHref);
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if (!parsed.hash) { return false; }
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var weaker;
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recents.some(function (pad) {
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var p = parsePadUrl(pad.href);
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if (p.type !== parsed.type) { return; } // Not the same type
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if (p.hash === parsed.hash) { return; } // Same hash, not stronger
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var pHash = p.hashData;
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var parsedHash = parsed.hashData;
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if (!parsedHash || !pHash) { return; }
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// We don't have stronger/weaker versions of files or users
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if (pHash.type !== 'pad' && parsedHash.type !== 'pad') { return; }
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if (pHash.version !== parsedHash.version) { return; }
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if (pHash.channel !== parsedHash.channel) { return; }
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if (pHash.mode === 'view' && parsedHash.mode === 'edit') {
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weaker = pad.href;
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return true;
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}
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return;
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});
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return weaker;
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};
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var findStronger = Hash.findStronger = function (href, recents) {
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var rHref = href || getRelativeHref(window.location.href);
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var parsed = parsePadUrl(rHref);
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if (!parsed.hash) { return false; }
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var stronger;
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recents.some(function (pad) {
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var p = parsePadUrl(pad.href);
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if (p.type !== parsed.type) { return; } // Not the same type
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if (p.hash === parsed.hash) { return; } // Same hash, not stronger
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var pHash = p.hashData;
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var parsedHash = parsed.hashData;
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if (!parsedHash || !pHash) { return; }
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// We don't have stronger/weaker versions of files or users
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if (pHash.type !== 'pad' && parsedHash.type !== 'pad') { return; }
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if (pHash.version !== parsedHash.version) { return; }
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if (pHash.channel !== parsedHash.channel) { return; }
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if (pHash.mode === 'edit' && parsedHash.mode === 'view') {
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stronger = pad.href;
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return true;
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}
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return;
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});
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return stronger;
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};
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Hash.isNotStrongestStored = function (href, recents) {
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return findStronger(href, recents);
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};
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Hash.hrefToHexChannelId = function (href) {
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var parsed = Hash.parsePadUrl(href);
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if (!parsed || !parsed.hash) { return; }
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parsed = parsed.hashData;
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if (parsed.version === 0) {
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return parsed.channel;
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} else if (parsed.version !== 1 && parsed.version !== 2) {
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console.error("parsed href had no version");
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console.error(parsed);
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return;
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}
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var channel = parsed.channel;
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if (!channel) { return; }
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var hex = base64ToHex(channel);
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return hex;
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};
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Hash.getBlobPathFromHex = function (id) {
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return '/blob/' + id.slice(0,2) + '/' + id;
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};
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Hash.serializeHash = function (hash) {
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if (hash && hash.slice(-1) !== "/") { hash += "/"; }
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return hash;
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};
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return Hash;
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});
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