Less magical constant

[vors.git] / cmd / server / main.go

diff --git a/cmd/server/main.go b/cmd/server/main.go
index 4764ad16fd177a00ab432df8d66e4d2001d823b39985e97074a0f9f08a8105ed..7f475f0e9b6bc201b780a25dce35c32b0cc42a78fd2872d040d09a488fc2bd19 100644 (file)
--- a/cmd/server/main.go
+++ b/cmd/server/main.go
@@ -38,6 +38,7 @@ import (
        "github.com/jroimartin/gocui"
        vors "go.stargrave.org/vors/internal"
        "golang.org/x/crypto/blake2s"
+       "golang.org/x/crypto/chacha20"
 )
 
 var (
@@ -256,17 +257,17 @@ func newPeer(conn *net.TCPConn) {
        }
 
        {
-               xof, err := blake2s.NewXOF(32+16, nil)
+               xof, err := blake2s.NewXOF(chacha20.KeySize+16, nil)
                if err != nil {
                        log.Fatalln(err)
                }
                xof.Write([]byte(vors.NoisePrologue))
                xof.Write(hs.ChannelBinding())
-               peer.key = make([]byte, 32+16)
+               peer.key = make([]byte, chacha20.KeySize+16)
                if _, err = io.ReadFull(xof, peer.key); err != nil {
                        log.Fatalln(err)
                }
-               peer.mac = siphash.New(peer.key[32:])
+               peer.mac = siphash.New(peer.key[chacha20.KeySize:])
        }
 
        {