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const Dexie = require('dexie');
const openpgp = require('openpgp');
openpgp.initWorker({path: 'openpgp.worker.js'});
let db;
/**
* Generates database and tables
* @returns Boolean
*/
function setupDatabase() {
db = new Dexie('texx');
window.db = db;
db.version(2).stores({
own_keys: '&key_type, key_data',
peer_keys: 'peer_id, key_data',
messages: 'peer_id, message'
});
localStorage.setItem('database', 'success');
db.open().catch(e => {
localStorage.setItem('database', 'failed');
console.error("Database failed: " + e.stack);
});
return true;
}
/**
* 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 db.own_keys.put({key_type: 'private_key', key_data: key.privateKeyArmored});
await db.own_keys.put({key_type: 'public_key', key_data: key.publicKeyArmored});
await db.own_keys.put({key_type: 'revocation_certificate', key_data: key.revocationCertificate}).then(() =>
console.log('[LOG] Successfully generated and stored keys!')
);
});
}
/**
* Gets the peers private key
* @returns {Promise<String>}
*/
async function getPrivateKey() {
return await db.own_keys.where('key_type').equals('private_key').limit(1).toArray().then(res => res.length > 0 ? res[0]['key_data'] : '');
}
/**
* Gets the peers public key
* @returns {Promise<String>}
*/
async function getPublicKey() {
return await db.own_keys.where('key_type').equals('public_key').limit(1).toArray().then(res => res.length > 0 ? res[0]['key_data'] : '');
}
/**
* Gets the peers revocation certificate
* @returns {Promise<String>}
*/
async function getRevocationCertificate() {
return await db.own_keys.where('key_type').equals('public_key').limit(1).toArray().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() {
return await Dexie.exists('texx').then(async (exists) => {
if (exists) {
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);
} else
return false;
});
}
/**
* Stores the public key of a peer
* @param peerId
* @param key
*/
async function storePeerPublicKey(peerId, key) {
console.log(peerId);
console.log(key);
await db.peer_keys.put({peer_id: peerId, key_data: 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 db.peer_keys.where('peer_id').equals(peerId).limit(1).toArray().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.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;
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