func (d *Dialer) NextDialRequest(round uint32, buckets uint32) *DialRequest {
var ex *DialExchange
select {
case pk := <-d.userDialRequests:
intro := (&Introduction{
Rendezvous: round + 4,
LongTermKey: *d.myPublicKey,
}).Marshal()
ctxt, _ := onionbox.Seal(intro, ForwardNonce(round), BoxKeys{pk}.Keys())
ex = &DialExchange{
Bucket: KeyDialBucket(pk, buckets),
}
copy(ex.EncryptedIntro[:], ctxt)
default:
ex = &DialExchange{
Bucket: ^uint32(0),
}
rand.Read(ex.EncryptedIntro[:])
}
onion, _ := onionbox.Seal(ex.Marshal(), ForwardNonce(round), d.pki.ServerKeys().Keys())
return &DialRequest{
Round: round,
Onion: onion,
}
}
func FillWithFakeDoubles(dest [][]byte, nonce *[24]byte, nextKeys []*[32]byte) {
ParallelFor(len(dest)/2, func(p *P) {
for i, ok := p.Next(); ok; i, ok = p.Next() {
var exchange1 [SizeConvoExchange]byte
var exchange2 [SizeConvoExchange]byte
rand.Read(exchange1[:])
copy(exchange2[0:16], exchange1[0:16])
rand.Read(exchange2[16:])
onion1, _ := onionbox.Seal(exchange1[:], nonce, nextKeys)
onion2, _ := onionbox.Seal(exchange2[:], nonce, nextKeys)
dest[i*2] = onion1
dest[i*2+1] = onion2
}
})
}
func FillWithFakeSingles(dest [][]byte, nonce *[24]byte, nextKeys []*[32]byte) {
ParallelFor(len(dest), func(p *P) {
for i, ok := p.Next(); ok; i, ok = p.Next() {
var exchange [SizeConvoExchange]byte
rand.Read(exchange[:])
onion, _ := onionbox.Seal(exchange[:], nonce, nextKeys)
dest[i] = onion
}
})
}
func (c *Conversation) NextConvoRequest(round uint32) *ConvoRequest {
c.Lock()
c.lastRound = round
c.Unlock()
go c.gui.Flush()
var body interface{}
select {
case m := <-c.outQueue:
body = &TextMessage{Message: m}
default:
body = &TimestampMessage{
Timestamp: time.Now(),
}
}
msg := &ConvoMessage{
Body: body,
}
msgdata := msg.Marshal()
var encmsg [SizeEncryptedMessage]byte
ctxt := c.Seal(msgdata[:], round, c.myRole())
copy(encmsg[:], ctxt)
exchange := &ConvoExchange{
DeadDrop: c.deadDrop(round),
EncryptedMessage: encmsg,
}
onion, sharedKeys := onionbox.Seal(exchange.Marshal(), ForwardNonce(round), c.pki.ServerKeys().Keys())
pr := &pendingRound{
onionSharedKeys: sharedKeys,
sentMessage: encmsg,
}
c.Lock()
c.pendingRounds[round] = pr
c.Unlock()
return &ConvoRequest{
Round: round,
Onion: onion,
}
}
func FillWithFakeIntroductions(dest [][]byte, noiseCounts []int, nonce *[24]byte, nextKeys []*[32]byte) {
buckets := make([]int, len(dest))
idx := 0
for b, count := range noiseCounts {
for i := 0; i < count; i++ {
buckets[idx] = b
idx++
}
}
ParallelFor(len(dest), func(p *P) {
for i, ok := p.Next(); ok; i, ok = p.Next() {
var exchange [SizeDialExchange]byte
binary.BigEndian.PutUint32(exchange[0:4], uint32(buckets[i]))
rand.Read(exchange[4:])
onion, _ := onionbox.Seal(exchange[:], nonce, nextKeys)
dest[i] = onion
}
})
}