1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
const Dexie = require('dexie');
const openpgp = require('openpgp');
let db;
/**
* Generates database and tables
* @returns Boolean
*/
function setupDatabase() {
db = new Dexie('texx');
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) {
//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 => 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 decryptPrivateKey(privateKey, 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);
}
/**
* Decrypts the private key
* @param privateKey
* @param passphrase
* @returns {Promise<module:key.Key>}
*/
async function decryptPrivateKey(privateKey, passphrase) {
const privateKeyObj = (await openpgp.key.readArmored(privateKey)).keys[0];
await privateKeyObj.decrypt(passphrase);
return privateKeyObj;
}
/**
* 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) {
await db.peer_keys.put({peer_id: peerId, key_data: key}).then(() =>
console.log('[LOG] Stored public key of ' + peerId)
);
}
/**
* Gets and verifies 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(async res => {
let publicKey;
if (res.length > 0) {
publicKey = res[0]['key_data'];
const publicKeyUserId = (await (await openpgp.key.readArmored(publicKey)).keys[0].getPrimaryUser()
.then(obj => obj.user.userId.userid));
if (publicKeyUserId !== peerId) {
publicKey = '';
console.error('[LOG] Public key verification failed! The peers real identity is ' + publicKeyUserId)
} else
console.log('[LOG] Public key verification succeeded!')
} else
publicKey = '';
return publicKey;
});
}
/**
* Resets the database/encryption
*/
function reset() {
db.delete();
localStorage.removeItem('database');
console.log('[LOG] Database has been deleted!')
}
/**
* 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.decryptPrivate = decryptPrivateKey;
exports.check = isEncrypted;
exports.store = storePeerPublicKey;
exports.get = getPeerPublicKey;
exports.reset = reset;
exports.test = testEncryption;
|
