// FetchPost fetches a post from a peer and adds it.
func (ms MessageServer) FetchPost(url, auth string, msgID [message.MessageIDSize]byte, expireRequest uint64) error {
// Fetch the post
proto := repproto.New(ms.SocksProxy, "")
data, err := proto.GetSpecificAuth(url, auth, msgID[:])
// data, err := proto.GetSpecific(url, msgID[:])
if err != nil {
return err
}
// Verify and use it
signheader, err := message.Base64Message(data).GetSignHeader()
if err != nil {
log.Debugf("Bad fetch:GetSignHeader: %s\n", err)
return err
}
details, err := message.VerifySignature(*signheader, ms.MinHashCashBits)
if err != nil {
log.Debugf("Bad fetch:VerifySignature: %s\n", err)
return err
}
constantRecipientPub, MessageID, err := deferVerify(data)
if err != nil {
log.Debugf("Bad fetch:deferVerify: %s\n", err)
return err
}
if *MessageID != details.MsgID {
log.Debugs("Bad fetch:MessageID\n")
return ErrBadMessageID
}
msgStruct := &structs.MessageStruct{
MessageID: *MessageID,
ReceiverConstantPubKey: *constantRecipientPub,
SignerPub: details.PublicKey,
OneTime: false,
Sync: false,
Hidden: false,
ExpireRequest: expireRequest,
}
if message.KeyIsSync(constantRecipientPub) {
msgStruct.Sync = true
}
if message.KeyIsHidden(constantRecipientPub) {
msgStruct.Hidden = true
}
sigStruct := &structs.SignerStruct{
PublicKey: details.PublicKey,
Nonce: details.HashCashNonce,
Bits: details.HashCashBits,
}
sigStruct.MaxMessagesPosted, sigStruct.MaxMessagesRetained, sigStruct.ExpireTarget = ms.calcLimits(details.HashCashBits)
return ms.DB.Put(msgStruct, sigStruct, data)
}
// ListSpecific lists the messages for pubKey from a specific server
func (proto *Proto) ListSpecific(server string, pubKey, privKey []byte, start, count int) (messages []*structs.MessageStruct, more bool, err error) {
var authStr string
var myPubKey message.Curve25519Key
copy(myPubKey[:], pubKey)
if message.KeyIsHidden(&myPubKey) {
if privKey == nil {
return nil, false, ErrPrivKey
}
auth, err := proto.Auth(server, privKey)
if err != nil {
return nil, false, err
}
authStr = "&auth=" + auth
}
url := constructURL(server, "/keyindex?key=", utils.B58encode(pubKey[:]), "&start=", strconv.Itoa(start), "count=", strconv.Itoa(count), authStr)
body, err := socks.Proxy(proto.SocksServer).LimitGet(url, 512000)
if err != nil {
return nil, false, err
}
return parseListResponse(body)
}
// ProcessPost verifies and adds a post to the database.
func (ms MessageServer) ProcessPost(postdata io.ReadCloser, oneTime bool, expireRequest uint64) string {
data, err := utils.MaxRead(ms.MaxPostSize, postdata)
if err != nil {
return "ERROR: Message too big\n"
}
if len(data) < ms.MinPostSize {
return "ERROR: Message too small\n"
}
signheader, err := message.Base64Message(data).GetSignHeader()
if err != nil {
log.Debugf("Post:GetSignHeader: %s\n", err)
return "ERROR: Sign Header\n"
}
details, err := message.VerifySignature(*signheader, ms.MinHashCashBits)
if err != nil {
log.Debugf("Post:VerifySignature: %s\n", err)
return "ERROR: HashCash\n"
}
constantRecipientPub, MessageID, err := deferVerify(data)
if err != nil {
log.Debugf("Post:deferVerify: %s\n", err)
return "ERROR: Verify\n"
}
if *MessageID != details.MsgID {
log.Debugs("Post:MessageID\n")
return "ERROR: MessageID\n"
}
msgStruct := &structs.MessageStruct{
MessageID: *MessageID,
ReceiverConstantPubKey: *constantRecipientPub,
SignerPub: details.PublicKey,
OneTime: oneTime,
Sync: false,
Hidden: false,
ExpireRequest: expireRequest,
}
if !oneTime {
if message.KeyIsSync(constantRecipientPub) {
msgStruct.Sync = true
}
} else {
msgStruct.Sync = false
}
if message.KeyIsHidden(constantRecipientPub) {
msgStruct.Hidden = true
}
sigStruct := &structs.SignerStruct{
PublicKey: details.PublicKey,
Nonce: details.HashCashNonce,
Bits: details.HashCashBits,
}
sigStruct.MaxMessagesPosted, sigStruct.MaxMessagesRetained, sigStruct.ExpireTarget = ms.calcLimits(details.HashCashBits)
_, _ = msgStruct, sigStruct
ms.RandomSleep()
// err = ms.DB.Put(msgStruct, sigStruct, data)
err = ms.DB.PutNotify(msgStruct, sigStruct, data, ms.notifyChan)
ms.RandomSleep()
if err != nil {
log.Debugf("Post:MessageDB: %s\n", err)
return fmt.Sprintf("ERROR: %s\n", err)
}
log.Debugf("Post:Added: %x\n", MessageID[:12])
if ms.Stat {
stat.Input <- stat.Post
}
return "SUCCESS: Connection close\n"
}
// GetKeyIndex returns the index for a key.
func (ms MessageServer) GetKeyIndex(w http.ResponseWriter, r *http.Request) {
var pubKey *message.Curve25519Key
var auth []byte
start := int64(0)
count := int64(10)
w.Header().Set("Content-Type", "text/plain; charset=us-ascii")
getValues := r.URL.Query()
if getValues != nil {
if v, ok := getValues["start"]; ok {
t, err := strconv.Atoi(v[0])
if err == nil {
start = int64(t)
}
}
if v, ok := getValues["count"]; ok {
t, err := strconv.Atoi(v[0])
if err == nil {
count = int64(t)
if count > ms.MaxIndexKey {
count = ms.MaxIndexKey
}
}
}
if v, ok := getValues["key"]; ok {
if len(v[0]) > message.Curve25519KeySize*10 {
io.WriteString(w, "ERROR: Bad param\n")
return
}
t := utils.B58decode(v[0])
if len(t) != message.Curve25519KeySize {
io.WriteString(w, "ERROR: Bad param\n")
return
}
pubKey = new(message.Curve25519Key)
copy(pubKey[:], t)
if v, ok := getValues["auth"]; ok {
if len(v[0]) > keyauth.AnswerSize*10 {
io.WriteString(w, "ERROR: Bad param\n")
return
}
auth = utils.B58decode(v[0])
if len(auth) != keyauth.AnswerSize {
io.WriteString(w, "ERROR: Bad param\n")
return
}
}
} else {
io.WriteString(w, "ERROR: Missing param\n")
return
}
} else {
io.WriteString(w, "ERROR: Missing param\n")
return
}
if pubKey == nil {
io.WriteString(w, "ERROR: Missing param\n")
return
}
if message.KeyIsHidden(pubKey) {
if auth == nil {
log.Debugs("List:Auth missing\n")
io.WriteString(w, "ERROR: Authentication required\n")
return
}
answer := [keyauth.AnswerSize]byte{}
copy(answer[:], auth)
now := uint64(time.Now().Unix() + ms.TimeSkew)
if !keyauth.VerifyTime(&answer, now, ms.TimeGrace) {
log.Debugs("List:Auth timeout\n")
io.WriteString(w, "ERROR: Authentication failed: Timeout\n")
return
}
privK := [32]byte(*ms.authPrivKey)
testK := [32]byte(*pubKey)
if !keyauth.Verify(&answer, &privK, &testK) {
log.Debugs("List:Auth no verify\n")
io.WriteString(w, "ERROR: Authentication failed: No Match\n")
return
}
}
messages, found, err := ms.DB.GetIndex(pubKey, start, count)
if err != nil && err != fileback.ErrNoMore {
log.Debugf("List:GetIndex: %s\n", err)
log.Debugf("List:GetIndex: Key %x\n", pubKey)
io.WriteString(w, "ERROR: List failed\n")
return
}
io.WriteString(w, "SUCCESS: Data follows\n")
for _, msg := range messages {
io.WriteString(w, "IDX: "+strings.Trim(string(msg), " \t\n\r")+"\n")
}
if int64(found) < count {
io.WriteString(w, "CMD: Exceeded\n")
} else {
io.WriteString(w, "CMD: Continue\n")
}
}
