// KiSSAnonHandshake does a named KiSS handshake over the given transport,
// validating the other end using the given verifier, which may be nil.
//
// Usually, clients use the anonymous handshake, while servers use the named handshake.
func KiSSNamedHandshake(identity natrium.EdDSAPrivate, check Verifier, transport io.ReadWriteCloser) (io.ReadWriteCloser, error) {
eph_priv := natrium.ECDHGenerateKey()
signat := identity.Sign(eph_priv.PublicKey())
// send NHLO message
tosend := kissNamedHello{eph_priv.PublicKey(), signat, identity.PublicKey()}
buf := new(bytes.Buffer)
err := struc.Pack(buf, &tosend)
if err != nil {
panic(err.Error())
}
packaged := kissSegment{0, kiss_NHLO, buf.Bytes()}
return kissFinishHandshake(eph_priv, packaged, check, transport)
}
func newServGroup(aidee natrium.EdDSAPrivate) (*servGroup, error) {
ambass := make([]*kiricom.ServerCtx, 8)
toret := new(servGroup)
toret.ambass = ambass
toret.deadch = make(chan bool)
toret.wirech = make(chan io.ReadWriteCloser)
toret.once = new(sync.Once)
toret.aidee = aidee
// contact all the ambassadors
for i := 0; i < 8; i++ {
haha, err := toret.connAmb(i)
if err != nil && err != core2core.ErrRejectedReq {
for j := 0; j < i; j++ {
if ambass[j] != nil {
ambass[j].Close()
}
}
return nil, err
}
ambass[i] = haha
}
kilog.Debug("serv: all ambassadors of %v notified", aidee.PublicKey())
// spin off a thread to update ambassadors from time to time
go func() {
for {
time.Sleep(time.Minute * 20)
FAST:
time.Sleep(time.Second)
allbad := true
for _, v := range ambass {
if v != nil {
allbad = false
break
}
}
if allbad {
kilog.Warning("serv: ambassadors ALL BAD!")
for i := 0; i < 8; i++ {
toret.revAmbass(i)
}
continue
}
// pick a random ambassador, kill, and resurrect
// TODO do something more graceful here
num := rand.Int() % len(ambass)
kilog.Debug("serv: ambassador %v of %v condemned", num, aidee.PublicKey())
condemned := ambass[num]
if condemned != nil {
kilog.Debug("serv: actually executed condemnation")
condemned.Close()
} else {
goto FAST
}
}
}()
// spin up threads to handle incoming connections
for i, lol := range ambass {
lol := lol
i := i
if lol != nil {
go toret.runAmbass(i, lol)
}
}
// return
return toret, nil
}