Example #1
0
File: ltc.go Project: wchh/gocoin
// LTC signing uses different seed string
func HashFromMessage(msg []byte, out []byte) {
	const MessageMagic = "Litecoin Signed Message:\n"
	b := new(bytes.Buffer)
	btc.WriteVlen(b, uint64(len(MessageMagic)))
	b.Write([]byte(MessageMagic))
	btc.WriteVlen(b, uint64(len(msg)))
	b.Write(msg)
	btc.ShaHash(b.Bytes(), out)
}
Example #2
0
func main() {
	if len(os.Args) != 5 {
		fmt.Println("This tool needs to be executed with 4 arguments:")
		fmt.Println(" 1) Name of the unsigned transaction file")
		fmt.Println(" 2) Input index to add the key & signature to")
		fmt.Println(" 3) Hex dump of the canonical signature")
		fmt.Println(" 4) Hex dump of the public key")
		return
	}
	tx := raw_tx_from_file(os.Args[1])
	if tx == nil {
		return
	}

	in, er := strconv.ParseUint(os.Args[2], 10, 32)
	if er != nil {
		println("Input index:", er.Error())
		return
	}

	if int(in) >= len(tx.TxIn) {
		println("Input index too big:", int(in), "/", len(tx.TxIn))
		return
	}

	sig, er := hex.DecodeString(os.Args[3])
	if er != nil {
		println("Signature:", er.Error())
		return
	}

	pk, er := hex.DecodeString(os.Args[4])
	if er != nil {
		println("Public key:", er.Error())
		return
	}

	buf := new(bytes.Buffer)
	btc.WriteVlen(buf, uint64(len(sig)))
	buf.Write(sig)
	btc.WriteVlen(buf, uint64(len(pk)))
	buf.Write(pk)

	tx.TxIn[in].ScriptSig = buf.Bytes()

	write_tx_file(tx)
}
Example #3
0
File: addr.go Project: wchh/gocoin
func (c *OneConnection) SendOwnAddr() {
	if ExternalAddrLen() > 0 {
		buf := new(bytes.Buffer)
		btc.WriteVlen(buf, uint64(1))
		binary.Write(buf, binary.LittleEndian, uint32(time.Now().Unix()))
		buf.Write(BestExternalAddr())
		c.SendRawMsg("addr", buf.Bytes())
	}
}
Example #4
0
File: addr.go Project: wchh/gocoin
func (c *OneConnection) SendAddr() {
	pers := peersdb.GetBestPeers(MaxAddrsPerMessage, nil)
	if len(pers) > 0 {
		buf := new(bytes.Buffer)
		btc.WriteVlen(buf, uint64(len(pers)))
		for i := range pers {
			binary.Write(buf, binary.LittleEndian, pers[i].Time)
			buf.Write(pers[i].NetAddr.Bytes())
		}
		c.SendRawMsg("addr", buf.Bytes())
	}
}
Example #5
0
File: invs.go Project: wchh/gocoin
func (c *OneConnection) SendInvs() (res bool) {
	b := new(bytes.Buffer)
	c.Mutex.Lock()
	if len(c.PendingInvs) > 0 {
		btc.WriteVlen(b, uint64(len(c.PendingInvs)))
		for i := range c.PendingInvs {
			b.Write((*c.PendingInvs[i])[:])
		}
		res = true
	}
	c.PendingInvs = nil
	c.Mutex.Unlock()
	if res {
		c.SendRawMsg("inv", b.Bytes())
	}
	return
}
Example #6
0
File: invs.go Project: wchh/gocoin
func (c *OneConnection) ProcessInv(pl []byte) {
	if len(pl) < 37 {
		//println(c.PeerAddr.Ip(), "inv payload too short", len(pl))
		c.DoS("InvEmpty")
		return
	}
	c.InvsRecieved++

	cnt, of := btc.VLen(pl)
	if len(pl) != of+36*cnt {
		println("inv payload length mismatch", len(pl), of, cnt)
	}

	var blinv2ask []byte

	for i := 0; i < cnt; i++ {
		typ := binary.LittleEndian.Uint32(pl[of : of+4])
		common.CountSafe(fmt.Sprint("InvGot", typ))
		if typ == 2 {
			if blockWanted(pl[of+4 : of+36]) {
				blinv2ask = append(blinv2ask, pl[of+4:of+36]...)
			}
		} else if typ == 1 {
			if common.CFG.TXPool.Enabled {
				c.TxInvNotify(pl[of+4 : of+36])
			}
		}
		of += 36
	}

	if len(blinv2ask) > 0 {
		bu := new(bytes.Buffer)
		btc.WriteVlen(bu, uint64(len(blinv2ask)/32))
		for i := 0; i < len(blinv2ask); i += 32 {
			bh := btc.NewUint256(blinv2ask[i : i+32])
			c.Mutex.Lock()
			c.GetBlockInProgress[bh.BIdx()] = &oneBlockDl{hash: bh, start: time.Now()}
			c.Mutex.Unlock()
			binary.Write(bu, binary.LittleEndian, uint32(2))
			bu.Write(bh.Hash[:])
		}
		c.SendRawMsg("getdata", bu.Bytes())
	}

	return
}
Example #7
0
File: invs.go Project: wchh/gocoin
func (c *OneConnection) GetBlocks(pl []byte) {
	h2get, hashstop, e := parseLocatorsPayload(pl)

	if e != nil || len(h2get) < 1 || hashstop == nil {
		println("GetBlocks: error parsing payload from", c.PeerAddr.Ip())
		c.DoS("BadGetBlks")
		return
	}

	invs := make(map[[32]byte]bool, 500)
	for i := range h2get {
		common.BlockChain.BlockIndexAccess.Lock()
		if bl, ok := common.BlockChain.BlockIndex[h2get[i].BIdx()]; ok {
			// make sure that this block is in our main chain
			common.Last.Mutex.Lock()
			end := common.Last.Block
			common.Last.Mutex.Unlock()
			for ; end != nil && end.Height >= bl.Height; end = end.Parent {
				if end == bl {
					addInvBlockBranch(invs, bl, hashstop) // Yes - this is the main chain
					if common.DebugLevel > 0 {
						fmt.Println(c.PeerAddr.Ip(), "getblocks from", bl.Height,
							"stop at", hashstop.String(), "->", len(invs), "invs")
					}

					if len(invs) > 0 {
						common.BlockChain.BlockIndexAccess.Unlock()

						inv := new(bytes.Buffer)
						btc.WriteVlen(inv, uint64(len(invs)))
						for k, _ := range invs {
							binary.Write(inv, binary.LittleEndian, uint32(2))
							inv.Write(k[:])
						}
						c.SendRawMsg("inv", inv.Bytes())
						return
					}
				}
			}
		}
		common.BlockChain.BlockIndexAccess.Unlock()
	}

	common.CountSafe("GetblksMissed")
	return
}
Example #8
0
// Commit the given add/del transactions to UTXO and Wnwind DBs
func (db *UnspentDB) CommitBlockTxs(changes *BlockChanges, blhash []byte) (e error) {
	undo_fn := fmt.Sprint(db.dir, changes.Height)

	if changes.UndoData != nil || (changes.Height%UnwindBufferMaxHistory) == 0 {
		bu := new(bytes.Buffer)
		bu.Write(blhash)
		if changes.UndoData != nil {
			for _, xx := range changes.UndoData {
				bin := xx.Serialize(true)
				btc.WriteVlen(bu, uint64(len(bin)))
				bu.Write(bin)
			}
		}
		ioutil.WriteFile(db.dir+"tmp", bu.Bytes(), 0666)
		os.Rename(db.dir+"tmp", undo_fn+".tmp")
	}

	db.nosync()
	db.commit(changes)
	if changes.LastKnownHeight <= changes.Height {
		db.Sync()
	}

	os.Rename(undo_fn+".tmp", undo_fn)

	if db.LastBlockHash == nil {
		db.LastBlockHash = make([]byte, 32)
	}
	copy(db.LastBlockHash, blhash)
	db.LastBlockHeight = changes.Height

	if changes.Height > UnwindBufferMaxHistory {
		os.Remove(fmt.Sprint(db.dir, changes.Height-UnwindBufferMaxHistory))
	}
	return
}
Example #9
0
File: blks.go Project: wchh/gocoin
func (c *one_net_conn) getnextblock() {
	if len(BlockQueue)*avg_block_size() > MEM_CACHE {
		COUNTER("GDFU")
		time.Sleep(100 * time.Millisecond)
		return
	}

	var cnt int
	b := new(bytes.Buffer)
	vl := new(bytes.Buffer)

	avs := avg_block_size()
	blks_to_get := uint32(MEM_CACHE / avs)
	max_cnt_to_get := (MAX_GET_FROM_PEER / avs) + 1
	if max_cnt_to_get > MAX_BLOCKS_AT_ONCE {
		max_cnt_to_get = MAX_BLOCKS_AT_ONCE
	}

	BlocksMutex.Lock()

	FetchBlocksTo = BlocksComplete + blks_to_get
	if FetchBlocksTo > LastBlockHeight {
		FetchBlocksTo = LastBlockHeight
	}

	bl_stage := uint32(0)
	for curblk := BlocksComplete; cnt < max_cnt_to_get; curblk++ {
		if curblk > FetchBlocksTo {
			if bl_stage == MAX_SAME_BLOCKS_AT_ONCE {
				break
			}
			bl_stage++
			curblk = BlocksComplete
		}
		if _, done := BlocksCached[curblk]; done {
			continue
		}

		bh, ok := BlocksToGet[curblk]
		if !ok {
			continue
		}

		cbip := BlocksInProgress[bh]
		if cbip == nil {
			// if not in progress then we always take it
			cbip = &one_bip{Height: curblk}
			cbip.Conns = make(map[uint32]bool, MaxNetworkConns)
		} else if cbip.Count != bl_stage || cbip.Conns[c.id] {
			continue
		}
		if LastBlockAsked < curblk {
			LastBlockAsked = curblk
		}

		cbip.Count = bl_stage + 1
		cbip.Conns[c.id] = true
		c.inprogress++
		BlocksInProgress[bh] = cbip

		b.Write([]byte{2, 0, 0, 0})
		b.Write(bh[:])
		cnt++
	}
	BlocksMutex.Unlock()

	if cnt > 0 {
		btc.WriteVlen(vl, uint64(cnt))
		c.sendmsg("getdata", append(vl.Bytes(), b.Bytes()...))
		COUNTER("GDYE")
	} else {
		COUNTER("GDNO")
		time.Sleep(100 * time.Millisecond)
	}
	c.Lock()
	c.last_blk_rcvd = time.Now()
	c.Unlock()
}
Example #10
0
File: data.go Project: wchh/gocoin
// Handle getheaders protocol command
// https://en.bitcoin.it/wiki/Protocol_specification#getheaders
func (c *OneConnection) GetHeaders(pl []byte) {
	h2get, hashstop, e := parseLocatorsPayload(pl)
	if e != nil || hashstop == nil {
		println("GetHeaders: error parsing payload from", c.PeerAddr.Ip())
		c.DoS("BadGetHdrs")
		return
	}

	if common.DebugLevel > 1 {
		println("GetHeaders", len(h2get), hashstop.String())
	}

	var best_block, last_block *chain.BlockTreeNode

	common.BlockChain.BlockIndexAccess.Lock()

	//println("GetHeaders", len(h2get), hashstop.String())
	if len(h2get) > 0 {
		for i := range h2get {
			if bl, ok := common.BlockChain.BlockIndex[h2get[i].BIdx()]; ok {
				if best_block == nil || bl.Height > best_block.Height {
					//println(" ... bbl", i, bl.Height, bl.BlockHash.String())
					best_block = bl
				}
			}
		}
	} else {
		best_block = common.BlockChain.BlockIndex[hashstop.BIdx()]
	}

	if best_block == nil {
		println("GetHeaders: best_block not found")
		common.BlockChain.BlockIndexAccess.Unlock()
		common.CountSafe("GetHeadersBadBlock")
		return
	}

	last_block = common.BlockChain.BlockTreeEnd

	var resp []byte
	var cnt uint32

	defer func() {
		common.BlockChain.BlockIndexAccess.Unlock()

		// If we get a hash of an old orphaned blocks, FindPathTo() will panic, so...
		if r := recover(); r != nil {
			common.CountSafe("GetHeadersOrphBlk")
			err, ok := r.(error)
			if !ok {
				err = fmt.Errorf("pkg: %v", r)
			}
			fmt.Println("GetHeaders panic recovered:", err.Error())
			fmt.Println("Cnt:", cnt, "  len(h2get):", len(h2get))
			if best_block != nil {
				fmt.Println("BestBlock:", best_block.Height, best_block.BlockHash.String())
			}
			if last_block != nil {
				fmt.Println("LastBlock:", last_block.Height, last_block.BlockHash.String())
			}
		}
		// send the response
		out := new(bytes.Buffer)
		btc.WriteVlen(out, uint64(cnt))
		out.Write(resp)
		c.SendRawMsg("headers", out.Bytes())
	}()

	for cnt < 2000 {
		best_block = best_block.FindPathTo(last_block)
		if best_block == nil {
			//println("FindPathTo failed", last_block.BlockHash.String(), cnt)
			//println("resp:", hex.EncodeToString(resp))
			break
		}
		resp = append(resp, append(best_block.BlockHeader[:], 0)...) // 81st byte is always zero
		cnt++
	}

	// Note: the deferred function will be called before exiting

	return
}
Example #11
0
File: data.go Project: wchh/gocoin
func (c *OneConnection) ProcessGetData(pl []byte) {
	var notfound []byte

	//println(c.PeerAddr.Ip(), "getdata")
	b := bytes.NewReader(pl)
	cnt, e := btc.ReadVLen(b)
	if e != nil {
		println("ProcessGetData:", e.Error(), c.PeerAddr.Ip())
		return
	}
	for i := 0; i < int(cnt); i++ {
		var typ uint32
		var h [36]byte

		n, _ := b.Read(h[:])
		if n != 36 {
			println("ProcessGetData: pl too short", c.PeerAddr.Ip())
			return
		}

		typ = binary.LittleEndian.Uint32(h[:4])

		common.CountSafe(fmt.Sprint("GetdataType", typ))
		if typ == 2 {
			uh := btc.NewUint256(h[4:])
			bl, _, er := common.BlockChain.Blocks.BlockGet(uh)
			if er == nil {
				c.SendRawMsg("block", bl)
			} else {
				notfound = append(notfound, h[:]...)
			}
		} else if typ == 1 {
			// transaction
			uh := btc.NewUint256(h[4:])
			TxMutex.Lock()
			if tx, ok := TransactionsToSend[uh.BIdx()]; ok && tx.Blocked == 0 {
				tx.SentCnt++
				tx.Lastsent = time.Now()
				TxMutex.Unlock()
				c.SendRawMsg("tx", tx.Data)
			} else {
				TxMutex.Unlock()
				notfound = append(notfound, h[:]...)
			}
		} else {
			if common.DebugLevel > 0 {
				println("getdata for type", typ, "not supported yet")
			}
			if typ > 0 && typ <= 3 /*3 is a filtered block(we dont support it)*/ {
				notfound = append(notfound, h[:]...)
			}
		}
	}

	if len(notfound) > 0 {
		buf := new(bytes.Buffer)
		btc.WriteVlen(buf, uint64(len(notfound)/36))
		buf.Write(notfound)
		c.SendRawMsg("notfound", buf.Bytes())
	}
}