blob: 0ade936eb9bf07ec68dd13670b2f644166cbe77e (
plain)
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
|
package handshake
import (
"crypto/rand"
"encoding/binary"
"time"
)
// Consts for Random in Handshake
const (
RandomBytesLength = 28
RandomLength = RandomBytesLength + 4
)
// Random value that is used in ClientHello and ServerHello
//
// https://tools.ietf.org/html/rfc4346#section-7.4.1.2
type Random struct {
GMTUnixTime time.Time
RandomBytes [RandomBytesLength]byte
}
// MarshalFixed encodes the Handshake
func (r *Random) MarshalFixed() [RandomLength]byte {
var out [RandomLength]byte
binary.BigEndian.PutUint32(out[0:], uint32(r.GMTUnixTime.Unix()))
copy(out[4:], r.RandomBytes[:])
return out
}
// UnmarshalFixed populates the message from encoded data
func (r *Random) UnmarshalFixed(data [RandomLength]byte) {
r.GMTUnixTime = time.Unix(int64(binary.BigEndian.Uint32(data[0:])), 0)
copy(r.RandomBytes[:], data[4:])
}
// Populate fills the handshakeRandom with random values
// may be called multiple times
func (r *Random) Populate() error {
r.GMTUnixTime = time.Now()
tmp := make([]byte, RandomBytesLength)
_, err := rand.Read(tmp)
copy(r.RandomBytes[:], tmp)
return err
}
|
