sqljs-documentstore
Version:
Minimal, encrypted, sql friendly typed document store, with support for indexed columns. Protects against transactional conflicts
216 lines • 10.9 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g = Object.create((typeof Iterator === "function" ? Iterator : Object).prototype);
return g.next = verb(0), g["throw"] = verb(1), g["return"] = verb(2), typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
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case 0: case 1: t = op; break;
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if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.flushHelpers = exports.cryptoHelpers = exports.sqljsHelpers = exports.sqljsPersistence = void 0;
var idb_keyval_1 = require("idb-keyval");
var sqljsPersistence;
(function (sqljsPersistence) {
var store = (0, idb_keyval_1.createStore)('sqljs-documentstore', 'databases');
function save(dbName, key, db) {
return __awaiter(this, void 0, void 0, function () {
var saltItem, salt;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, (0, idb_keyval_1.get)("".concat(dbName, "-salt"), store)];
case 1:
saltItem = _a.sent();
salt = saltItem ? new Uint8Array(saltItem) : crypto.getRandomValues(new Uint8Array(16));
return [4 /*yield*/, _save(dbName, key, salt, db)];
case 2:
_a.sent();
return [2 /*return*/];
}
});
});
}
sqljsPersistence.save = save;
function _save(dbName, key, salt, db) {
return __awaiter(this, void 0, void 0, function () {
var encryptedData;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, cryptoHelpers.encrypt(key, salt, db.export())];
case 1:
encryptedData = _a.sent();
return [4 /*yield*/, (0, idb_keyval_1.setMany)([
["".concat(dbName), encryptedData.data],
["".concat(dbName, "-iv"), encryptedData.iv],
["".concat(dbName, "-salt"), encryptedData.salt]
], store)];
case 2:
_a.sent();
return [2 /*return*/];
}
});
});
}
function load(dbName, passPhrase, sqlJsStatic) {
return __awaiter(this, void 0, void 0, function () {
var _a, encryptedData, iv, salt, newDb, k_1, k, existingData;
return __generator(this, function (_b) {
switch (_b.label) {
case 0: return [4 /*yield*/, (0, idb_keyval_1.getMany)([dbName, "".concat(dbName, "-iv"), "".concat(dbName, "-salt")], store)];
case 1:
_a = _b.sent(), encryptedData = _a[0], iv = _a[1], salt = _a[2];
if (!!encryptedData) return [3 /*break*/, 4];
newDb = new sqlJsStatic.Database();
return [4 /*yield*/, cryptoHelpers.getKey(passPhrase)];
case 2:
k_1 = _b.sent();
return [4 /*yield*/, _save(dbName, k_1.key, k_1.salt, newDb)];
case 3:
_b.sent();
return [2 /*return*/, { key: k_1.key, database: newDb }];
case 4: return [4 /*yield*/, cryptoHelpers.getKey(passPhrase, salt)];
case 5:
k = _b.sent();
return [4 /*yield*/, cryptoHelpers.decrypt(k.key, iv, encryptedData)];
case 6:
existingData = _b.sent();
return [2 /*return*/, { key: k.key, database: new sqlJsStatic.Database(new Uint8Array(existingData)) }];
}
});
});
}
sqljsPersistence.load = load;
})(sqljsPersistence || (exports.sqljsPersistence = sqljsPersistence = {}));
var sqljsHelpers;
(function (sqljsHelpers) {
function query(db, sql, params) {
if (params === void 0) { params = []; }
var allResults = exec(db, sql, params); //expect only one result set, if there are multiple, just take the last one
var result = allResults[allResults.length - 1];
if (result === undefined || result.values.length == 0)
return [];
var columns = result.columns, values = result.values;
return values.map(function (row) { return Object.fromEntries(columns.map(function (col, i) { return [col, row[i]]; })); });
}
sqljsHelpers.query = query;
function exec(db, sql, params) {
if (params === void 0) { params = []; }
return db.exec(sql, sanitizeParams(params));
}
sqljsHelpers.exec = exec;
function run(db, sql, params) {
if (params === void 0) { params = []; }
db.run(sql, sanitizeParams(params));
}
sqljsHelpers.run = run;
function isTable(db, table) { return db.exec("SELECT name FROM sqlite_master WHERE type='table' AND name=?;", [table]).values.length > 0; }
sqljsHelpers.isTable = isTable;
function sanitizeParams(params) { return params.map(function (v) { return v == undefined ? null : v == true ? 1 : v == false ? 0 : v; }); }
sqljsHelpers.sanitizeParams = sanitizeParams;
})(sqljsHelpers || (exports.sqljsHelpers = sqljsHelpers = {}));
var cryptoHelpers;
(function (cryptoHelpers) {
function getKey(passphrase, salt) {
return __awaiter(this, void 0, void 0, function () {
var keyMaterial, r;
var _a;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
salt = salt !== null && salt !== void 0 ? salt : crypto.getRandomValues(new Uint8Array(16));
return [4 /*yield*/, crypto.subtle.importKey('raw', new TextEncoder().encode(passphrase), 'PBKDF2', false, ['deriveKey'])];
case 1:
keyMaterial = _b.sent();
_a = {};
return [4 /*yield*/, crypto.subtle.deriveKey({ name: 'PBKDF2', salt: salt, iterations: 100000, hash: 'SHA-256' }, keyMaterial, { name: 'AES-GCM', length: 256 }, false, ['encrypt', 'decrypt'])];
case 2:
r = (_a.key = _b.sent(), _a.salt = salt, _a);
return [2 /*return*/, r];
}
});
});
}
cryptoHelpers.getKey = getKey;
function encrypt(key, salt, data) {
return __awaiter(this, void 0, void 0, function () {
var iv, encrypted;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
iv = crypto.getRandomValues(new Uint8Array(12));
return [4 /*yield*/, crypto.subtle.encrypt({ name: 'AES-GCM', iv: iv }, key, data)];
case 1:
encrypted = _a.sent();
return [2 /*return*/, { salt: salt, iv: iv, data: new Uint8Array(encrypted) }];
}
});
});
}
cryptoHelpers.encrypt = encrypt;
function decrypt(key, iv, encryptedData) {
return __awaiter(this, void 0, void 0, function () {
var data;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, crypto.subtle.decrypt({ name: 'AES-GCM', iv: iv }, key, encryptedData)];
case 1:
data = _a.sent();
return [2 /*return*/, data];
}
});
});
}
cryptoHelpers.decrypt = decrypt;
})(cryptoHelpers || (exports.cryptoHelpers = cryptoHelpers = {}));
var flushHelpers;
(function (flushHelpers) {
function createAsyncFlushQueue(saveFn) {
var isRunning = false;
var queued = false;
var run = function () {
if (isRunning) {
queued = true;
return;
}
isRunning = true;
saveFn().finally(function () {
isRunning = false;
if (queued) {
queued = false;
run();
}
});
};
return run;
}
flushHelpers.createAsyncFlushQueue = createAsyncFlushQueue;
})(flushHelpers || (exports.flushHelpers = flushHelpers = {}));
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