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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package ssh
// Key exchange tests.
import (
"crypto/rand"
"reflect"
"sync"
"testing"
)
// Runs multiple key exchanges concurrent to detect potential data races with
// kex obtained from the global kexAlgoMap.
// This test needs to be executed using the race detector in order to detect
// race conditions.
func TestKexes(t *testing.T) {
type kexResultErr struct {
result *kexResult
err error
}
for name, kex := range kexAlgoMap {
t.Run(name, func(t *testing.T) {
wg := sync.WaitGroup{}
for i := 0; i < 3; i++ {
wg.Add(1)
go func() {
defer wg.Done()
a, b := memPipe()
s := make(chan kexResultErr, 1)
c := make(chan kexResultErr, 1)
var magics handshakeMagics
go func() {
r, e := kex.Client(a, rand.Reader, &magics)
a.Close()
c <- kexResultErr{r, e}
}()
go func() {
r, e := kex.Server(b, rand.Reader, &magics, testSigners["ecdsa"])
b.Close()
s <- kexResultErr{r, e}
}()
clientRes := <-c
serverRes := <-s
if clientRes.err != nil {
t.Errorf("client: %v", clientRes.err)
}
if serverRes.err != nil {
t.Errorf("server: %v", serverRes.err)
}
if !reflect.DeepEqual(clientRes.result, serverRes.result) {
t.Errorf("kex %q: mismatch %#v, %#v", name, clientRes.result, serverRes.result)
}
}()
}
wg.Wait()
})
}
}
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