forked from ssbc/go-secretstream
-
Notifications
You must be signed in to change notification settings - Fork 0
/
client.go
77 lines (64 loc) · 2.08 KB
/
client.go
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
/*
This file is part of secretstream.
secretstream 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 of the License, or
(at your option) any later version.
secretstream 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 secretstream. If not, see <http://www.gnu.org/licenses/>.
*/
package secretstream
import (
"net"
"strings"
"github.com/agl/ed25519"
"github.com/cryptix/secretstream/boxstream"
"github.com/cryptix/secretstream/secrethandshake"
)
// Client can dial secret-handshake server endpoints
type Client struct {
appKey []byte
kp secrethandshake.EdKeyPair
}
// NewClient creates a new Client with the passed keyPair and appKey
func NewClient(kp secrethandshake.EdKeyPair, appKey []byte) (*Client, error) {
// TODO: consistancy check?!..
return &Client{
appKey: appKey,
kp: kp,
}, nil
}
// NewDialer returns a net.Dial-esque dialer that does a secrethandshake key exchange
// and wraps the underlying connection into a boxstream
func (c *Client) NewDialer(pubKey [ed25519.PublicKeySize]byte) (Dialer, error) {
return func(n, a string) (net.Conn, error) {
if !strings.HasPrefix(n, "tcp") {
return nil, ErrOnlyTCP
}
conn, err := net.Dial(n, a)
if err != nil {
return nil, err
}
state, err := secrethandshake.NewClientState(c.appKey, c.kp, pubKey)
if err != nil {
return nil, err
}
if err := secrethandshake.Client(state, conn); err != nil {
return nil, err
}
enKey, enNonce := state.GetBoxstreamEncKeys()
deKey, deNonce := state.GetBoxstreamDecKeys()
boxed := Conn{
Reader: boxstream.NewUnboxer(conn, &deNonce, &deKey),
Writer: boxstream.NewBoxer(conn, &enNonce, &enKey),
conn: conn,
local: c.kp.Public[:],
remote: state.Remote(),
}
return boxed, nil
}, nil
}