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
|
/* ID Management
*
* This module exists to hold the decrypted credentials for the current session.
* It therefore exposes sign methods, because it is able to perform these
* with noa dditional authentication, because its very instantiation
* means the vault is unlocked.
*/
const ethUtil = require('ethereumjs-util')
const Transaction = require('ethereumjs-tx')
module.exports = IdManagement
function IdManagement (opts) {
if (!opts) opts = {}
this.keyStore = opts.keyStore
this.derivedKey = opts.derivedKey
this.configManager = opts.configManager
this.hdPathString = "m/44'/60'/0'/0"
this.getAddresses = function () {
return this.keyStore.getAddresses(this.hdPathString).map(function (address) { return '0x' + address })
}
this.signTx = function (txParams) {
// normalize values
txParams.gasPrice = ethUtil.intToHex(txParams.gasPrice)
txParams.to = ethUtil.addHexPrefix(txParams.to)
txParams.from = ethUtil.addHexPrefix(txParams.from.toLowerCase())
txParams.value = ethUtil.addHexPrefix(txParams.value)
txParams.data = ethUtil.addHexPrefix(txParams.data)
txParams.gasLimit = ethUtil.addHexPrefix(txParams.gasLimit || txParams.gas)
txParams.nonce = ethUtil.addHexPrefix(txParams.nonce)
var tx = new Transaction(txParams)
// sign tx
var privKeyHex = this.exportPrivateKey(txParams.from)
var privKey = ethUtil.toBuffer(privKeyHex)
tx.sign(privKey)
// Add the tx hash to the persisted meta-tx object
var txHash = ethUtil.bufferToHex(tx.hash())
var metaTx = this.configManager.getTx(txParams.metamaskId)
metaTx.hash = txHash
this.configManager.updateTx(metaTx)
// return raw serialized tx
var rawTx = ethUtil.bufferToHex(tx.serialize())
return rawTx
}
this.signMsg = function (address, message) {
// sign message
var privKeyHex = this.exportPrivateKey(address.toLowerCase())
var privKey = ethUtil.toBuffer(privKeyHex)
var msgSig = ethUtil.ecsign(new Buffer(message.replace('0x', ''), 'hex'), privKey)
var rawMsgSig = ethUtil.bufferToHex(concatSig(msgSig.v, msgSig.r, msgSig.s))
return rawMsgSig
}
this.getSeed = function () {
return this.keyStore.getSeed(this.derivedKey)
}
this.exportPrivateKey = function (address) {
var privKeyHex = ethUtil.addHexPrefix(this.keyStore.exportPrivateKey(address, this.derivedKey, this.hdPathString))
return privKeyHex
}
}
function padWithZeroes (number, length) {
var myString = '' + number
while (myString.length < length) {
myString = '0' + myString
}
return myString
}
function concatSig (v, r, s) {
const rSig = ethUtil.fromSigned(r)
const sSig = ethUtil.fromSigned(s)
const vSig = ethUtil.bufferToInt(v)
const rStr = padWithZeroes(ethUtil.toUnsigned(rSig).toString('hex'), 64)
const sStr = padWithZeroes(ethUtil.toUnsigned(sSig).toString('hex'), 64)
const vStr = ethUtil.stripHexPrefix(ethUtil.intToHex(vSig))
return ethUtil.addHexPrefix(rStr.concat(sStr, vStr)).toString('hex')
}
|
