// Creates a collection with a specific uniq element, used for friend collections
func (this *MetaMgr) CreateSpecialCollection(owner *crypto.SecretIdentity, uniq *crypto.Digest) (cid string) {
pubkey := owner.Public()
cb := &collectionBasis{
Uniq: uniq,
Owner: pubkey,
}
cid = crypto.HashOf(cb.Owner.Fingerprint(), cb.Uniq).String()
existing := this.SyncMgr.Get(sync.RTBasis, cid, "$")
if existing != nil {
return cid
}
basis := &sync.Record{
RecordType: sync.RTBasis,
Topic: cid,
Key: "$",
Author: pubkey.Fingerprint().String(),
Value: transfer.AsBytes(cb),
}
signRecord(basis, owner)
this.SyncMgr.Put(basis)
owr := &sync.Record{
RecordType: sync.RTWriter,
Topic: cid,
Key: pubkey.Fingerprint().String(),
Value: transfer.AsBytes(pubkey),
}
signRecord(owr, owner)
this.SyncMgr.Put(owr)
return
}
func verifyRecord(rec *sync.Record, writer *crypto.PublicIdentity) bool {
hash := crypto.HashOf(rec.RecordType, rec.Topic, rec.Key, rec.Value, rec.Priority)
var sig *crypto.Signature
err := transfer.DecodeBytes(rec.Signature, &sig)
if err != nil {
panic(err)
}
return writer.Verify(hash, sig)
}
func (this *ApiMgr) getSelf(w http.ResponseWriter, req *http.Request) {
myFp := this.Ident.Public().Fingerprint()
myCid := crypto.HashOf(myFp, myFp).String()
json := SelfJson{
Id: myFp.String(),
Host: this.ExtHost,
Port: this.ExtPort,
SelfCid: myCid,
}
this.sendJson(w, json)
}
func (this *SyncMgr) onFriendChange(id int, fp *crypto.Digest, what link.FriendStatus) {
this.cmut.Lock()
if what == link.FriendStartup || what == link.FriendAdded {
this.Log.Printf("Adding friend: %s", fp.String())
myFp := this.Ident.Public().Fingerprint()
this.Db.Exec("INSERT OR IGNORE INTO TopicFriend (topic, friend_id, desired, requested) VALUES (?, ?, ?, ?)",
crypto.HashOf(fp, myFp).String(), id, 1, 1)
this.Db.Exec("INSERT OR IGNORE INTO TopicFriend (topic, friend_id, desired, requested) VALUES (?, ?, ?, ?)",
crypto.HashOf(myFp, fp).String(), id, 1, 1)
cl := newClientLooper(this, id)
this.clients[fp.String()] = cl
cl.run()
} else {
cl := this.clients[fp.String()]
cl.stop()
delete(this.clients, fp.String())
this.Db.Exec("DELETE INTO TopicFriend WHERE friend_id = ?", id)
}
this.cmut.Unlock()
}
func (this *LinkMgr) UpdateIsGd(fi *friendInfo) {
theHash := crypto.HashOf(fi.fingerprint, fi.isgdid)
this.Log.Printf("Trying to update isGd for %s, id = %d", fi.fingerprint.String(), fi.isgdid)
isgdurl := "http://is.gd/forward.php?format=json&shorturl=" + theHash.String()[0:24]
this.Log.Printf("Doing get of: %s", isgdurl)
resp, err := http.Get(isgdurl)
this.Log.Printf("Get has returned")
if err != nil {
this.Log.Printf("Failed to do get of: %s", "http://is.gd/forward.php?format=json&shorturl="+theHash.String())
return
}
if resp.StatusCode != http.StatusOK {
this.Log.Printf("Status not OK")
return
}
dec := json.NewDecoder(resp.Body)
var gd isGdJson
err = dec.Decode(&gd)
if err != nil {
this.Log.Printf("Unable to decode")
return
}
url, err := url.Parse(gd.Url)
if err != nil {
this.Log.Printf("Unable to parse as URL: '%s'", gd.Url)
return
}
var ip1, ip2, ip3, ip4 int
var port int
_, err = fmt.Sscanf(url.Host, "%d.%d.%d.%d:%d", &ip1, &ip2, &ip3, &ip3, &port)
if err != nil {
this.Log.Printf("Unable to parse as host: '%s': %v", url.Host, err)
return
}
host := fmt.Sprintf("%d.%d.%d.%d", ip1, ip2, ip3, ip4)
this.Log.Printf("Updating %s to %s:%d", fi.fingerprint.String(), host, port)
fi.host = host
fi.port = uint16(port)
fi.isgdid++
this.Db.Exec("UPDATE Friend SET host = ?, port = ?, isgdid = ? WHERE id = ?",
host, port, fi.isgdid, fi.id)
}
// Checks if basis record is valid, if so, returns owner ID, otherwise nil
func (this *MetaMgr) decodeBasis(rec *sync.Record, check bool) *crypto.PublicIdentity {
var cb *collectionBasis
if rec == nil {
return nil
}
err := transfer.DecodeBytes(rec.Value, &cb)
if err != nil {
this.Log.Printf("Unable to decode basis: %s", err)
return nil
}
if check {
cid := crypto.HashOf(cb.Owner.Fingerprint(), cb.Uniq).String()
if cid != rec.Topic {
this.Log.Printf("Basis hash mismatch: %s vs %s", cid, rec.Topic)
return nil
}
}
return cb.Owner
}
// Update the subscription state for a topic on a particular friend.
func (this *SyncMgr) Subscribe(id *crypto.Digest, topic string, enable bool) bool {
this.cmut.RLock()
client, ok := this.clients[id.String()]
this.cmut.RUnlock()
if !ok {
return false
}
client.lock.Lock()
this.Db.Exec("INSERT OR IGNORE INTO TopicFriend (friend_id, topic) VALUES (?, ?)",
client.friendId, topic)
this.Db.Exec("UPDATE TopicFriend SET desired = ? WHERE friend_id = ? AND topic = ?",
enable, client.friendId, topic)
row := this.Db.SingleQuery("SELECT heard_seqno FROM TopicFriend WHERE friend_id = ? AND topic = ?",
client.friendId, topic)
var heard int
this.Db.Scan(row, &heard)
enbyte := byte(0)
if enable {
enbyte = 1
}
myFp := this.Ident.Public().Fingerprint()
client.lock.Unlock()
this.Put(&Record{
RecordType: RTSubscribe,
Topic: crypto.HashOf(myFp, id).String(),
Key: topic,
Value: []byte{enbyte},
Priority: heard,
Author: "$",
})
return true
}
func (this *ApiMgr) populateFriend(json *FriendJson, myFp, fp *crypto.Digest) {
json.Id = fp.String()
json.SelfCid = crypto.HashOf(fp, fp).String()
json.SendCid = crypto.HashOf(myFp, fp).String()
json.RecvCid = crypto.HashOf(fp, myFp).String()
}
// Creates a new collection with a specific owner, no writers (except owner), and no data.
func (this *MetaMgr) CreateNewCollection(owner *crypto.SecretIdentity) (cid string) {
uniq := make([]byte, 16)
io.ReadFull(rand.Reader, uniq)
return this.CreateSpecialCollection(owner, crypto.HashOf(uniq))
}
func signRecord(rec *sync.Record, writer *crypto.SecretIdentity) {
hash := crypto.HashOf(rec.RecordType, rec.Topic, rec.Key, rec.Value, rec.Priority)
sig := writer.Sign(hash)
rec.Author = writer.Fingerprint().String()
rec.Signature = transfer.AsBytes(sig)
}
