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
|
/*
* This file is part of GNU Taler
* (C) 2020 Taler Systems S.A.
*
* GNU Taler is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 3, or (at your option) any later version.
*
* GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
package net.taler.lib.wallet.crypto
internal interface Crypto {
fun sha256(input: ByteArray): ByteArray
fun sha512(input: ByteArray): ByteArray
fun getHashSha512State(): HashSha512State
fun getRandomBytes(num: Int): ByteArray
fun eddsaGetPublic(eddsaPrivateKey: ByteArray): ByteArray
fun ecdheGetPublic(ecdhePrivateKey: ByteArray): ByteArray
fun createEddsaKeyPair(): EddsaKeyPair
fun createEcdheKeyPair(): EcdheKeyPair
fun eddsaSign(msg: ByteArray, eddsaPrivateKey: ByteArray): ByteArray
fun eddsaVerify(msg: ByteArray, sig: ByteArray, eddsaPub: ByteArray): Boolean
fun keyExchangeEddsaEcdhe(eddsaPrivateKey: ByteArray, ecdhePublicKey: ByteArray): ByteArray
fun keyExchangeEcdheEddsa(ecdhePrivateKey: ByteArray, eddsaPublicKey: ByteArray): ByteArray
fun kdf(outputLength: Int, ikm: ByteArray, salt: ByteArray, info: ByteArray): ByteArray
fun rsaBlind(hm: ByteArray, bks: ByteArray, rsaPubEnc: ByteArray): ByteArray
fun rsaUnblind(sig: ByteArray, rsaPubEnc: ByteArray, bks: ByteArray): ByteArray
fun rsaVerify(hm: ByteArray, rsaSig: ByteArray, rsaPubEnc: ByteArray): Boolean
fun setupRefreshPlanchet(secretSeed: ByteArray, coinNumber: Int): FreshCoin
}
interface HashSha512State {
fun update(data: ByteArray): HashSha512State
fun final(): ByteArray
}
class EddsaKeyPair(val privateKey: ByteArray, val publicKey: ByteArray)
class EcdheKeyPair(val privateKey: ByteArray, val publicKey: ByteArray)
data class FreshCoin(val coinPublicKey: ByteArray, val coinPrivateKey: ByteArray, val bks: ByteArray) {
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other == null || this::class != other::class) return false
other as FreshCoin
if (!coinPublicKey.contentEquals(other.coinPublicKey)) return false
if (!coinPrivateKey.contentEquals(other.coinPrivateKey)) return false
if (!bks.contentEquals(other.bks)) return false
return true
}
override fun hashCode(): Int {
var result = coinPublicKey.contentHashCode()
result = 31 * result + coinPrivateKey.contentHashCode()
result = 31 * result + bks.contentHashCode()
return result
}
}
internal expect object CryptoFactory {
internal fun getCrypto(): Crypto
}
private val hexArray = arrayOf('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f')
fun ByteArray.toHexString(): String {
val hexChars = CharArray(this.size * 2)
for (j in this.indices) {
val v = (this[j].toInt() and 0xFF)
hexChars[j * 2] = hexArray[v ushr 4]
hexChars[j * 2 + 1] = hexArray[v and 0x0F]
}
return String(hexChars)
}
|
