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package client
import (
"math/rand"
"github.com/twstrike/otr3"
)
// Conversation represents a conversation with encryption capabilities
type Conversation interface {
Send(Sender, string, []byte) (trace int, err error)
Receive(Sender, string, []byte) ([]byte, error)
StartEncryptedChat(Sender, string) error
EndEncryptedChat(Sender, string) error
ProvideAuthenticationSecret(Sender, string, []byte) error
StartAuthenticate(Sender, string, string, []byte) error
GetSSID() [8]byte
IsEncrypted() bool
OurFingerprint() []byte
TheirFingerprint() []byte
//TODO: should we expose TO and remove this from gui.ConversationWindow?
}
type conversation struct {
to string
resource string
*otr3.Conversation
}
func (c *conversation) StartEncryptedChat(s Sender, resource string) error {
return s.Send(c.to, resource, string(c.QueryMessage()))
}
func (c *conversation) sendAll(s Sender, resource string, toSend []otr3.ValidMessage) error {
for _, msg := range toSend {
err := s.Send(c.to, resource, string(msg))
if err != nil {
return err
}
}
return nil
}
func (c *conversation) EndEncryptedChat(s Sender, resource string) error {
toSend, err := c.End()
if err != nil {
return err
}
return c.sendAll(s, resource, toSend)
}
func (c *conversation) Send(s Sender, resource string, m []byte) (trace int, err error) {
trace = rand.Int()
toSend, err := c.Conversation.Send(m, trace)
if err != nil {
return 0, err
}
return trace, c.sendAll(s, resource, toSend)
}
func (c *conversation) Receive(s Sender, resource string, m []byte) ([]byte, error) {
plain, toSend, err := c.Conversation.Receive(m)
err2 := c.sendAll(s, resource, toSend)
if err != nil {
return plain, err
}
return plain, err2
}
func (c *conversation) ProvideAuthenticationSecret(s Sender, resource string, m []byte) error {
toSend, err := c.Conversation.ProvideAuthenticationSecret(m)
if err != nil {
return err
}
return c.sendAll(s, resource, toSend)
}
func (c *conversation) StartAuthenticate(s Sender, resource string, q string, m []byte) error {
toSend, err := c.Conversation.StartAuthenticate(q, m)
if err != nil {
return err
}
return c.sendAll(s, resource, toSend)
}
func (c *conversation) OurFingerprint() []byte {
sk := c.Conversation.GetOurCurrentKey()
if sk == nil {
return nil
}
pk := sk.PublicKey()
if pk == nil {
return nil
}
return pk.Fingerprint()
}
func (c *conversation) TheirFingerprint() []byte {
pk := c.GetTheirKey()
if pk == nil {
return nil
}
return pk.Fingerprint()
}
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