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- const crypto = require("crypto");
- const sql = require('./sql.js');
- const decryptService = require('./decrypt.js');
- function getDataKey(password) {
- if (!password) {
- return null;
- }
- try {
- const passwordDerivedKey = getPasswordDerivedKey(password);
- const encryptedDataKey = getOption('encryptedDataKey');
- const decryptedDataKey = decryptService.decrypt(passwordDerivedKey, encryptedDataKey, 16);
- return decryptedDataKey;
- }
- catch (e) {
- throw new Error(`Cannot read data key, the entered password might be wrong. The underlying error: '${e.message}', stack:\n${e.stack}`);
- }
- }
- function getPasswordDerivedKey(password) {
- const salt = getOption('passwordDerivedKeySalt');
- return getScryptHash(password, salt);
- }
- function getScryptHash(password, salt) {
- const hashed = crypto.scryptSync(password, salt, 32,
- {N: 16384, r:8, p:1});
- return hashed;
- }
- function getOption(name) {
- return sql.getValue("SELECT value FROM options WHERE name = ?", [name]);
- }
- module.exports = {
- getDataKey
- };
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