func NewIdentity(keys cipherset.Keys, parts cipherset.Parts, addrs []net.Addr) (*Identity, error) {
var err error
ident := &Identity{
keys: keys,
parts: parts,
addrs: addrs,
}
if len(ident.keys) == 0 {
return nil, ErrNoKeys
}
if ident.parts == nil {
ident.parts = make(cipherset.Parts, len(ident.keys))
}
for csid, part := range hashname.PartsFromKeys(ident.keys) {
ident.parts[csid] = part
}
ident.hashname, err = hashname.FromIntermediates(ident.parts)
if err != nil {
return nil, err
}
return ident, nil
}
func main() {
args, _ := docopt.Parse(usage, nil, true, "0.1-dev", false)
var (
output = args["--output"].(string)
keys = cipherset.Keys{}
data []byte
err error
out struct {
Hashname hashname.H `json:"hashname,omitempty"`
Parts cipherset.Parts `json:"parts,omitempty"`
Keys cipherset.PrivateKeys `json:"keys,omitempty"`
}
)
{ // CS 1a
k, err := cipherset.GenerateKey(0x1a)
assert(err)
keys[0x1a] = k
}
{ // CS 3a
k, err := cipherset.GenerateKey(0x3a)
assert(err)
keys[0x3a] = k
}
out.Keys = cipherset.PrivateKeys(keys)
out.Parts = hashname.PartsFromKeys(keys)
out.Hashname, err = hashname.FromIntermediates(out.Parts)
assert(err)
if len(out.Keys) == 0 {
out.Keys = nil
}
if len(out.Parts) == 0 {
out.Keys = nil
}
data, err = json.MarshalIndent(out, "", " ")
assert(err)
fmt.Fprintf(os.Stderr, "Generated keys for: %s\n", out.Hashname)
if output == "-" {
fmt.Println(string(data))
} else {
err := ioutil.WriteFile(output, data, 0600)
assert(err)
}
}
func (mod *module) handle_connect(ch *e3x.Channel) {
defer ch.Kill()
var (
from hashname.H
localIdent *e3x.Identity
remoteIdent *e3x.Identity
handshake cipherset.Handshake
innerData = bufpool.New()
err error
)
localIdent, err = mod.e.LocalIdentity()
if err != nil {
return
}
pkt, err := ch.ReadPacket()
if err != nil {
return
}
pkt.Body(innerData.SetLen(pkt.BodyLen()).RawBytes()[:0])
inner, err := lob.Decode(innerData)
if err != nil {
return
}
innerHdr := inner.Header()
if innerHdr.IsBinary() && len(innerHdr.Bytes) == 1 {
// handshake
var (
csid = innerHdr.Bytes[0]
key = localIdent.Keys()[csid]
)
if key == nil {
return
}
handshake, err = cipherset.DecryptHandshake(csid, key, inner.Body(nil))
if err != nil {
return
}
from, err = hashname.FromIntermediates(handshake.Parts())
if err != nil {
return
}
remoteIdent, err = e3x.NewIdentity(cipherset.Keys{
handshake.CSID(): handshake.PublicKey(),
}, handshake.Parts(), nil)
if err != nil {
return
}
} else {
// key packet
var parts = make(cipherset.Parts)
var csid uint8
for key, value := range inner.Header().Extra {
if len(key) != 2 {
continue
}
keyData, err := hex.DecodeString(key)
if err != nil {
continue
}
partCSID := keyData[0]
switch v := value.(type) {
case bool:
csid = partCSID
case string:
parts[partCSID] = v
}
}
hn, err := hashname.FromKeyAndIntermediates(csid, inner.Body(nil), parts)
if err != nil {
return
}
from = hn
pubKey, err := cipherset.DecodeKeyBytes(csid, inner.Body(nil), nil)
if err != nil {
return
}
remoteIdent, err = e3x.NewIdentity(cipherset.Keys{csid: pubKey}, parts, nil)
if err != nil {
return
}
}
if from == "" {
return
}
if mod.config.AllowConnect != nil && !mod.config.AllowConnect(from, ch.RemoteHashname()) {
return
}
x, err := mod.e.CreateExchange(remoteIdent)
if err != nil {
return
}
// when the BODY contains a handshake
if handshake != nil {
routerExchange := ch.Exchange()
routerAddr := &peerAddr{
router: routerExchange.RemoteHashname(),
}
conn := newConnection(x.RemoteHashname(), routerAddr, routerExchange, func() {
mod.unregisterConnection(routerExchange, x.LocalToken())
})
pipe, added := x.AddPipeConnection(conn, nil)
if added {
mod.registerConnection(routerExchange, x.LocalToken(), conn)
}
resp, ok := x.ApplyHandshake(handshake, pipe)
if !ok {
return
}
if resp != nil {
err = mod.peerVia(ch.Exchange(), from, resp)
if err != nil {
return
}
}
}
// when the BODY contains a key packet
if handshake == nil {
pkt, err := x.GenerateHandshake()
if err != nil {
return
}
err = mod.peerVia(ch.Exchange(), from, pkt)
if err != nil {
return
}
}
// Notify on-exchange callbacks
mod.getIntroduction(from).resolve(x, nil)
}