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const sql = require('alasql');
const openpgp = require('openpgp');
openpgp.initWorker({path: 'openpgp.worker.js'});
/**
* Generates database and tables
* @returns Boolean
*/
function setupDatabase() {
return sql('CREATE INDEXEDDB DATABASE IF NOT EXISTS texx; \
ATTACH INDEXEDDB DATABASE texx; \
USE texx; \
CREATE TABLE IF NOT EXISTS own_keys (key_type STRING, key_data STRING); \
CREATE TABLE IF NOT EXISTS peer_keys (peer_id STRING, key_data STRING); \
CREATE TABLE IF NOT EXISTS messages (id INT AUTO_INCREMENT, message STRING);', () => {
localStorage.setItem('database', 'success');
return true;
})
}
/**
* Sets up connection between memory storage and indexeddb
*/
function setupDatabaseConnection() {
sql.promise('CREATE INDEXEDDB DATABASE IF NOT EXISTS texx; ATTACH INDEXEDDB DATABASE texx; USE texx;')
}
window.test = (() => {
sql('CREATE INDEXEDDB DATABASE IF NOT EXISTS geo;\
ATTACH INDEXEDDB DATABASE geo; \
USE geo; \
CREATE TABLE IF NOT EXISTS cities (city string, population number); \
INSERT INTO cities Values ("' + (Math.random() * 100) + '","' + (Math.random() * 100) + '")', function () {
// Select data from IndexedDB
sql.promise('SELECT * FROM cities')
.then(function (res) {
console.log(res);
});
});
});
/**
* Generates and stores encrypted private key, public key and a revocation certificate
* @param peerId
* @param passphrase
* @returns {Promise<void>}
*/
async function generateKeys(peerId, passphrase) {
const options = {
userIds: [{name: peerId}],
numBits: 4096,
passphrase: passphrase
};
await openpgp.generateKey(options).then(async (key) => {
await sql.promise([`INSERT INTO own_keys VALUES ("private_key", "${key.privateKeyArmored}");`,
`INSERT INTO own_keys VALUES ("public_key", "${key.publicKeyArmored}");`,
`INSERT INTO own_keys VALUES ("revocation_certificate", "${key.revocationCertificate}");`]).then(() =>
console.log('[LOG] Successfully generated and stored keys!')
);
});
}
/**
* Gets the peers private key
* @returns {Promise<String>}
*/
async function getPrivateKey() {
return await sql.promise('SELECT key_data FROM own_keys WHERE key_type = "private_key" LIMIT 1').then(res => res.length > 0 ? res[0]['key_data'] : '');
}
/**
* Gets the peers public key
* @returns {Promise<String>}
*/
async function getPublicKey() {
return await sql.promise('SELECT key_data FROM own_keys WHERE key_type = "public_key" LIMIT 1').then(res => res.length > 0 ? res[0]['key_data'] : '');
}
/**
* Gets the peers revocation certificate
* @returns {Promise<String>}
*/
async function getRevocationCertificate() {
return await sql.promise('SELECT key_data FROM own_keys WHERE key_type = "revocation_certificate" LIMIT 1').then(res => res.length > 0 ? res[0]['key_data'] : '');
}
/**
* /**
* Encrypts the data with a public key (e.g the one of the peer with which you're chatting)
* @param data
* @param publicKey
* @returns {Promise<String>}
*/
async function encrypt(data, publicKey) {
console.log(publicKey);
//const privateKeyObj = (await openpgp.key.readArmored(privateKey)).keys[0];
//await privateKeyObj.decrypt(passphrase);
const options = {
message: openpgp.message.fromText(data),
publicKeys: (await openpgp.key.readArmored(publicKey)).keys,
//privateKeys: [privateKeyObj] // TODO: Use private key for signing
};
return await openpgp.encrypt(options).then(ciphertext => {
console.log(ciphertext.data);
return ciphertext.data;
});
}
/**
* Decrypts encrypted data with own encrypted private key and verifies the data with the public key
* @param data
* @param publicKey
* @param privateKey
* @param passphrase
* @returns {Promise<String>}
*/
async function decrypt(data, publicKey, privateKey, passphrase) {
const privateKeyObj = (await openpgp.key.readArmored(privateKey)).keys[0];
await privateKeyObj.decrypt(passphrase);
const options = {
message: await openpgp.message.readArmored(data),
publicKeys: (await openpgp.key.readArmored(publicKey)).keys, // for verification
privateKeys: [privateKeyObj]
};
return await openpgp.decrypt(options).then(plaintext => plaintext.data)
}
/**
* Checks whether the peer has keys
* @returns {boolean}
*/
async function isEncrypted() {
const hasPrivateKey = await getPrivateKey().then(res => res !== '');
const hasPublicKey = await getPublicKey().then(res => res !== '');
const hasRevocationCertificate = await getRevocationCertificate().then(res => res !== '');
return (hasPrivateKey && hasPublicKey && hasRevocationCertificate);
}
/**
* Stores the public key of a peer
* @param peerId
* @param key
*/
async function storePeerPublicKey(peerId, key) {
console.log(peerId);
console.log(key);
await sql.promise(`INSERT INTO peer_keys VALUES ("${peerId}", "${key}")`).then(() =>
console.log('[LOG] Stored public key of ' + peerId)
);
}
/**
* Gets the public key of a peer
* @param peerId
* @returns {Promise<String>}
*/
async function getPeerPublicKey(peerId) {
return await sql.promise(`SELECT key_data FROM peer_keys WHERE peer_id = "${peerId}" LIMIT 1`).then(res =>
res.length > 0 ? res[0]['key_data'] : ''
);
}
/**
* Just a general test case
*/
function testEncryption() {
generateKeys('test_id', 'supersecure').then(() => {
encrypt('The meaning of life', getPublicKey()).then(encrypted => {
decrypt(encrypted, getPublicKey(), getPrivateKey(), 'supersecure').then(decrypted => {
if (decrypted === 'The meaning of life')
console.log("YEEHA, Test succeeded!")
})
})
})
}
exports.setup = setupDatabase;
exports.setupConn = setupDatabaseConnection;
exports.generate = generateKeys;
exports.getPrivate = getPrivateKey;
exports.getPublic = getPublicKey;
exports.encrypt = encrypt;
exports.decrypt = decrypt;
exports.check = isEncrypted;
exports.store = storePeerPublicKey;
exports.get = getPeerPublicKey;
exports.test = testEncryption;
window.sql = sql; // For debugging
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