+++ /dev/null
-/*
-NNCP -- Node to Node copy, utilities for store-and-forward data exchange
-Copyright (C) 2016-2019 Sergey Matveev <stargrave@stargrave.org>
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, version 3 of the License.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-package nncp
-
-import (
- "bytes"
- "errors"
- "log"
- "os"
- "path"
-
- "github.com/gorhill/cronexpr"
- "golang.org/x/crypto/ed25519"
- "golang.org/x/crypto/ssh/terminal"
- "gopkg.in/yaml.v2"
-)
-
-const (
- CfgPathEnv = "NNCPCFG"
- CfgSpoolEnv = "NNCPSPOOL"
- CfgLogEnv = "NNCPLOG"
-)
-
-var (
- DefaultCfgPath string = "/usr/local/etc/nncp.yaml"
- DefaultSendmailPath string = "/usr/sbin/sendmail"
- DefaultSpoolPath string = "/var/spool/nncp"
- DefaultLogPath string = "/var/spool/nncp/log"
-)
-
-type NodeYAML struct {
- Id string
- ExchPub string
- SignPub string
- NoisePub *string `yaml:"noisepub,omitempty"`
- Exec map[string][]string `yaml:"exec,omitempty"`
- Incoming *string `yaml:"incoming,omitempty"`
- Freq *string `yaml:"freq,omitempty"`
- FreqChunked *uint64 `yaml:"freqchunked,omitempty"`
- FreqMinSize *uint64 `yaml:"freqminsize,omitempty"`
- Via []string `yaml:"via,omitempty"`
- Calls []CallYAML `yaml:"calls,omitempty"`
-
- Addrs map[string]string `yaml:"addrs,omitempty"`
-
- RxRate *int `yaml:"rxrate,omitempty"`
- TxRate *int `yaml:"txrate,omitempty"`
- OnlineDeadline *uint `yaml:"onlinedeadline,omitempty"`
- MaxOnlineTime *uint `yaml:"maxonlinetime,omitempty"`
-}
-
-type CallYAML struct {
- Cron string
- Nice *string `yaml:"nice,omitempty"`
- Xx string `yaml:"xx,omitempty"`
- RxRate *int `yaml:"rxrate,omitempty"`
- TxRate *int `yaml:"txrate,omitempty"`
- Addr *string `yaml:"addr,omitempty"`
- OnlineDeadline *uint `yaml:"onlinedeadline,omitempty"`
- MaxOnlineTime *uint `yaml:"maxonlinetime,omitempty"`
-}
-
-type NodeOurYAML struct {
- Id string
- ExchPub string
- ExchPrv string
- SignPub string
- SignPrv string
- NoisePrv string
- NoisePub string
-}
-
-type FromToYAML struct {
- From string
- To string
-}
-
-type NotifyYAML struct {
- File *FromToYAML `yaml:"file,omitempty"`
- Freq *FromToYAML `yaml:"freq,omitempty"`
-}
-
-type CfgYAML struct {
- Self *NodeOurYAML `yaml:"self,omitempty"`
- Neigh map[string]NodeYAML
-
- Spool string
- Log string
- Notify *NotifyYAML `yaml:"notify,omitempty"`
-}
-
-func NewNode(name string, yml NodeYAML) (*Node, error) {
- nodeId, err := NodeIdFromString(yml.Id)
- if err != nil {
- return nil, err
- }
-
- exchPub, err := FromBase32(yml.ExchPub)
- if err != nil {
- return nil, err
- }
- if len(exchPub) != 32 {
- return nil, errors.New("Invalid exchPub size")
- }
-
- signPub, err := FromBase32(yml.SignPub)
- if err != nil {
- return nil, err
- }
- if len(signPub) != ed25519.PublicKeySize {
- return nil, errors.New("Invalid signPub size")
- }
-
- var noisePub []byte
- if yml.NoisePub != nil {
- noisePub, err = FromBase32(*yml.NoisePub)
- if err != nil {
- return nil, err
- }
- if len(noisePub) != 32 {
- return nil, errors.New("Invalid noisePub size")
- }
- }
-
- var incoming *string
- if yml.Incoming != nil {
- inc := path.Clean(*yml.Incoming)
- if !path.IsAbs(inc) {
- return nil, errors.New("Incoming path must be absolute")
- }
- incoming = &inc
- }
-
- var freq *string
- if yml.Freq != nil {
- fr := path.Clean(*yml.Freq)
- if !path.IsAbs(fr) {
- return nil, errors.New("Freq path must be absolute")
- }
- freq = &fr
- }
- var freqChunked int64
- if yml.FreqChunked != nil {
- if *yml.FreqChunked == 0 {
- return nil, errors.New("freqchunked value must be greater than zero")
- }
- freqChunked = int64(*yml.FreqChunked) * 1024
- }
- var freqMinSize int64
- if yml.FreqMinSize != nil {
- freqMinSize = int64(*yml.FreqMinSize) * 1024
- }
-
- defRxRate := 0
- if yml.RxRate != nil && *yml.RxRate > 0 {
- defRxRate = *yml.RxRate
- }
- defTxRate := 0
- if yml.TxRate != nil && *yml.TxRate > 0 {
- defTxRate = *yml.TxRate
- }
-
- defOnlineDeadline := uint(DefaultDeadline)
- if yml.OnlineDeadline != nil {
- if *yml.OnlineDeadline <= 0 {
- return nil, errors.New("OnlineDeadline must be at least 1 second")
- }
- defOnlineDeadline = *yml.OnlineDeadline
- }
- var defMaxOnlineTime uint
- if yml.MaxOnlineTime != nil {
- defMaxOnlineTime = *yml.MaxOnlineTime
- }
-
- var calls []*Call
- for _, callYml := range yml.Calls {
- expr, err := cronexpr.Parse(callYml.Cron)
- if err != nil {
- return nil, err
- }
-
- nice := uint8(255)
- if callYml.Nice != nil {
- nice, err = NicenessParse(*callYml.Nice)
- if err != nil {
- return nil, err
- }
- }
-
- var xx TRxTx
- switch callYml.Xx {
- case "rx":
- xx = TRx
- case "tx":
- xx = TTx
- case "":
- default:
- return nil, errors.New("xx field must be either \"rx\" or \"tx\"")
- }
-
- rxRate := defRxRate
- if callYml.RxRate != nil {
- rxRate = *callYml.RxRate
- }
- txRate := defTxRate
- if callYml.TxRate != nil {
- txRate = *callYml.TxRate
- }
-
- var addr *string
- if callYml.Addr != nil {
- if a, exists := yml.Addrs[*callYml.Addr]; exists {
- addr = &a
- } else {
- addr = callYml.Addr
- }
- }
-
- onlineDeadline := defOnlineDeadline
- if callYml.OnlineDeadline != nil {
- if *callYml.OnlineDeadline == 0 {
- return nil, errors.New("OnlineDeadline must be at least 1 second")
- }
- onlineDeadline = *callYml.OnlineDeadline
- }
-
- var maxOnlineTime uint
- if callYml.MaxOnlineTime != nil {
- maxOnlineTime = *callYml.MaxOnlineTime
- }
-
- calls = append(calls, &Call{
- Cron: expr,
- Nice: nice,
- Xx: xx,
- RxRate: rxRate,
- TxRate: txRate,
- Addr: addr,
- OnlineDeadline: onlineDeadline,
- MaxOnlineTime: maxOnlineTime,
- })
- }
-
- node := Node{
- Name: name,
- Id: nodeId,
- ExchPub: new([32]byte),
- SignPub: ed25519.PublicKey(signPub),
- Exec: yml.Exec,
- Incoming: incoming,
- Freq: freq,
- FreqChunked: freqChunked,
- FreqMinSize: freqMinSize,
- Calls: calls,
- Addrs: yml.Addrs,
- RxRate: defRxRate,
- TxRate: defTxRate,
- OnlineDeadline: defOnlineDeadline,
- MaxOnlineTime: defMaxOnlineTime,
- }
- copy(node.ExchPub[:], exchPub)
- if len(noisePub) > 0 {
- node.NoisePub = new([32]byte)
- copy(node.NoisePub[:], noisePub)
- }
- return &node, nil
-}
-
-func NewNodeOur(yml *NodeOurYAML) (*NodeOur, error) {
- id, err := NodeIdFromString(yml.Id)
- if err != nil {
- return nil, err
- }
-
- exchPub, err := FromBase32(yml.ExchPub)
- if err != nil {
- return nil, err
- }
- if len(exchPub) != 32 {
- return nil, errors.New("Invalid exchPub size")
- }
-
- exchPrv, err := FromBase32(yml.ExchPrv)
- if err != nil {
- return nil, err
- }
- if len(exchPrv) != 32 {
- return nil, errors.New("Invalid exchPrv size")
- }
-
- signPub, err := FromBase32(yml.SignPub)
- if err != nil {
- return nil, err
- }
- if len(signPub) != ed25519.PublicKeySize {
- return nil, errors.New("Invalid signPub size")
- }
-
- signPrv, err := FromBase32(yml.SignPrv)
- if err != nil {
- return nil, err
- }
- if len(signPrv) != ed25519.PrivateKeySize {
- return nil, errors.New("Invalid signPrv size")
- }
-
- noisePub, err := FromBase32(yml.NoisePub)
- if err != nil {
- return nil, err
- }
- if len(noisePub) != 32 {
- return nil, errors.New("Invalid noisePub size")
- }
-
- noisePrv, err := FromBase32(yml.NoisePrv)
- if err != nil {
- return nil, err
- }
- if len(noisePrv) != 32 {
- return nil, errors.New("Invalid noisePrv size")
- }
-
- node := NodeOur{
- Id: id,
- ExchPub: new([32]byte),
- ExchPrv: new([32]byte),
- SignPub: ed25519.PublicKey(signPub),
- SignPrv: ed25519.PrivateKey(signPrv),
- NoisePub: new([32]byte),
- NoisePrv: new([32]byte),
- }
- copy(node.ExchPub[:], exchPub)
- copy(node.ExchPrv[:], exchPrv)
- copy(node.NoisePub[:], noisePub)
- copy(node.NoisePrv[:], noisePrv)
- return &node, nil
-}
-
-func (nodeOur *NodeOur) ToYAML() string {
- yml := NodeOurYAML{
- Id: nodeOur.Id.String(),
- ExchPub: ToBase32(nodeOur.ExchPub[:]),
- ExchPrv: ToBase32(nodeOur.ExchPrv[:]),
- SignPub: ToBase32(nodeOur.SignPub[:]),
- SignPrv: ToBase32(nodeOur.SignPrv[:]),
- NoisePub: ToBase32(nodeOur.NoisePub[:]),
- NoisePrv: ToBase32(nodeOur.NoisePrv[:]),
- }
- raw, err := yaml.Marshal(&yml)
- if err != nil {
- panic(err)
- }
- return string(raw)
-}
-
-func CfgParse(data []byte) (*Ctx, error) {
- var err error
- if bytes.Compare(data[:8], MagicNNCPBv3[:]) == 0 {
- os.Stderr.WriteString("Passphrase:")
- password, err := terminal.ReadPassword(0)
- if err != nil {
- log.Fatalln(err)
- }
- os.Stderr.WriteString("\n")
- data, err = DeEBlob(data, password)
- if err != nil {
- return nil, err
- }
- }
- var cfgYAML CfgYAML
- if err = yaml.Unmarshal(data, &cfgYAML); err != nil {
- return nil, err
- }
- if _, exists := cfgYAML.Neigh["self"]; !exists {
- return nil, errors.New("self neighbour missing")
- }
- var self *NodeOur
- if cfgYAML.Self != nil {
- self, err = NewNodeOur(cfgYAML.Self)
- if err != nil {
- return nil, err
- }
- }
- spoolPath := path.Clean(cfgYAML.Spool)
- if !path.IsAbs(spoolPath) {
- return nil, errors.New("Spool path must be absolute")
- }
- logPath := path.Clean(cfgYAML.Log)
- if !path.IsAbs(logPath) {
- return nil, errors.New("Log path must be absolute")
- }
- ctx := Ctx{
- Spool: spoolPath,
- LogPath: logPath,
- Self: self,
- Neigh: make(map[NodeId]*Node, len(cfgYAML.Neigh)),
- Alias: make(map[string]*NodeId),
- }
- if cfgYAML.Notify != nil {
- if cfgYAML.Notify.File != nil {
- ctx.NotifyFile = cfgYAML.Notify.File
- }
- if cfgYAML.Notify.Freq != nil {
- ctx.NotifyFreq = cfgYAML.Notify.Freq
- }
- }
- vias := make(map[NodeId][]string)
- for name, neighYAML := range cfgYAML.Neigh {
- neigh, err := NewNode(name, neighYAML)
- if err != nil {
- return nil, err
- }
- ctx.Neigh[*neigh.Id] = neigh
- if _, already := ctx.Alias[name]; already {
- return nil, errors.New("Node names conflict")
- }
- ctx.Alias[name] = neigh.Id
- vias[*neigh.Id] = neighYAML.Via
- }
- ctx.SelfId = ctx.Alias["self"]
- for neighId, viasRaw := range vias {
- for _, viaRaw := range viasRaw {
- foundNodeId, err := ctx.FindNode(viaRaw)
- if err != nil {
- return nil, err
- }
- ctx.Neigh[neighId].Via = append(
- ctx.Neigh[neighId].Via,
- foundNodeId.Id,
- )
- }
- }
- return &ctx, nil
-}