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pull/18/head
Hugo Landau 10 years ago
parent fff64d57a6
commit a0765e806b
2 changed files with 453 additions and 62 deletions
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22
namecoin.go
Unescape Escape View File

@ -3,6 +3,7 @@ import "github.com/conformal/btcjson"
import "encoding/json"
import "sync/atomic"
import "fmt"
//import "github.com/hlandau/degoutils/log"
var idCounter int32 = 0
@ -61,6 +62,7 @@ func replyParser(m json.RawMessage) (interface{}, error) {
if err != nil {
return nil, err
}
return nsr, nil
}
@ -75,28 +77,40 @@ type NamecoinConn struct {
}
func (nc *NamecoinConn) Query(name string) (v string, err error) {
if name == "d/badger" {
v = `{"ns":["ns1.badger.bit","ns2.badger.bit"],"map":{"ns1":{"ip":["1.2.3.4"]},"ns2":{"ip":["2.3.4.5"]}},"ds":[[12345,8,2,"lu6y/9mwDNRpTngni179qwqARGVntp9jTaB48NkPAbo="]]}`
return
}
cmd, err := NewNameShowCmd(newID(), name)
if err != nil {
//log.Info("NC NEWCMD ", err)
return "", err
}
r, err := btcjson.RpcSend(nc.Username, nc.Password, nc.Server, cmd)
if err != nil {
if e, ok := err.(*btcjson.Error); ok {
if e.Code == -4 {
return "", err
}
if r.Error != nil {
//log.Info("RPC error: ", r.Error)
if r.Error.Code == -4 {
return "", ErrNoSuchDomain
}
}
return "", err
return "", r.Error
}
if r.Result == nil {
//log.Info("NC NILRESULT")
return "", fmt.Errorf("got nil result")
}
if nsr, ok := r.Result.(*NameShowReply); ok {
//log.Info("NC OK")
return nsr.Value, nil
} else {
//log.Info("NC BADREPLY")
return "", fmt.Errorf("bad reply")
}
}

493
ncdns.go
Unescape Escape View File

@ -7,9 +7,13 @@ import "syscall"
import "fmt"
import "github.com/golang/groupcache/lru"
import "encoding/json"
import "encoding/base32"
import "encoding/base64"
import "encoding/hex"
import "strings"
import "net"
import "time"
import "sort"
//import "crypto/rsa"
//import "crypto/rand"
@ -54,7 +58,8 @@ func (s *Server) doRunListener(ds *dns.Server) {
func (s *Server) runListener(net string) *dns.Server {
ds := &dns.Server {
Addr: ":1153",
Addr: "127.0.0.2:53",
//Addr: ":1153",
Net: net,
Handler: s.mux,
}
@ -75,6 +80,7 @@ type ncValue struct {
Alias string `json:"alias"`
NS interface{} `json:"ns"`
Map map[string]*ncValue `json:"map"` // may contain "" and "*"
DS [][]interface{} `json:"ds"`
}
func (s *Server) getNamecoinEntry(name string) (*Domain, error) {
@ -95,9 +101,12 @@ func (s *Server) getNamecoinEntry(name string) (*Domain, error) {
func (s *Server) getNamecoinEntryLL(name string) (*Domain, error) {
v, err := s.nc.Query(name)
if err != nil {
log.Infoe(err, "namecoin query failed: ", err)
return nil, err
}
log.Info("namecoin query (", name, ") succeeded: ", v)
d, err := s.jsonToDomain(v)
if err != nil {
log.Infoe(err, "cannot convert JSON to domain")
@ -175,6 +184,56 @@ func (ncv *ncValue) GetNSs() (nss []string, err error) {
return ncv.getArray(ncv.NS)
}
func (ncv *ncValue) GetDSs() (dss []dns.DS, err error) {
for _, ds := range ncv.DS {
log.Info(" - DS: ", ds)
if len(ds) != 4 {
log.Info(" DS is bad len")
continue
}
a1, ok := ds[0].(float64)
if !ok {
log.Info(" DS[0]")
continue
}
a2, ok := ds[1].(float64)
if !ok {
log.Info(" DS[1]")
continue
}
a3, ok := ds[2].(float64)
if !ok {
log.Info(" DS[2]")
continue
}
a4, ok := ds[3].(string)
if !ok {
log.Info(" DS[3]")
continue
}
a4b, err := base64.StdEncoding.DecodeString(a4)
if err != nil {
log.Info("can't decode: ", err)
err = nil
continue
}
a4h := hex.EncodeToString(a4b)
d := dns.DS {
Hdr: dns.RR_Header { Rrtype: dns.TypeDS, Class: dns.ClassINET, Ttl: 60, },
KeyTag: uint16(a1),
Algorithm: uint8(a2),
DigestType: uint8(a3),
Digest: a4h,
}
dss = append(dss, d)
}
return
}
// a.b.c.d.e.f.g.zzz.bit
// f("a.b.c.d.e.f.g", "zzz.bit")
// f[g]("a.b.c.d.e.f", "g.zzz.bit")
@ -186,8 +245,42 @@ func (ncv *ncValue) GetNSs() (nss []string, err error) {
// f[a]("", "a.b.c.d.e.f.g.zzz.bit")
var ErrNoSuchDomain = fmt.Errorf("no such domain")
var ErrNoResults = fmt.Errorf("no results")
func stepName(n string) string {
if len(n) == 0 {
return ""
}
b, err := base32.HexEncoding.DecodeString(n)
log.Panice(err, n)
for i := len(b)-1; i>=0; i-- {
b[i] += 1
if b[i] != 0 { // didn't rollover, don't need to continue
break
}
}
return base32.HexEncoding.EncodeToString(b)
}
func (s *Server) addAnswersUnderNCValue(ncv *ncValue, subname, basename, rootname string, qtype uint16, res *dns.Msg, depth int) error {
toAdd := []dns.RR{}
toAddAuthority := []dns.RR{}
nss, nsserr := ncv.GetNSs()
log.Info("ncv sub=", subname, " base=", basename, " root=", rootname, " qtype=", qtype, " nss=", nss, " nsserr=", nsserr)
if nsserr == nil && len(nss) > 0 {
for _, ns := range nss {
toAddAuthority = append(toAddAuthority, &dns.NS {
Hdr: dns.RR_Header { Name: strings.TrimRight(basename, ".") + ".", Rrtype: dns.TypeNS, Class: dns.ClassINET, Ttl: 60, },
Ns: strings.TrimRight(ns, ".") + ".",
})
}
}
func (s *Server) addAnswersUnderNCValue(ncv *ncValue, subname, basename, rootname string, qtype uint16, res *dns.Msg) error {
if subname != "" {
head, rest, err := splitDomainHead(subname)
if err != nil {
@ -201,11 +294,9 @@ func (s *Server) addAnswersUnderNCValue(ncv *ncValue, subname, basename, rootnam
return ErrNoSuchDomain
}
}
return s.addAnswersUnderNCValue(sub, rest, head + "." + basename, rootname, qtype, res)
return s.addAnswersUnderNCValue(sub, rest, head + "." + basename, rootname, qtype, res, depth+1)
}
toAdd := []dns.RR{}
switch qtype {
case dns.TypeA:
ips, err := ncv.GetIPs()
@ -240,9 +331,8 @@ func (s *Server) addAnswersUnderNCValue(ncv *ncValue, subname, basename, rootnam
}
case dns.TypeNS:
nss, err := ncv.GetNSs()
if err != nil {
return err
if nsserr != nil {
return nsserr
}
for _, ns := range nss {
@ -258,14 +348,27 @@ func (s *Server) addAnswersUnderNCValue(ncv *ncValue, subname, basename, rootnam
// TODO
case dns.TypeSRV:
// TODO
case dns.TypeDS:
dss, err := ncv.GetDSs()
if err != nil {
return err
}
for i := range dss {
dss[i].Hdr.Name = basename
toAdd = append(toAdd, &dss[i])
}
log.Info("ds: ", dss, " ", err)
default:
// ...
}
if len(toAdd) == 0 {
if len(toAdd) == 0 && len(toAddAuthority) == 0 {
// we didn't get anything, so try the "" entry in the map
if m, ok := ncv.Map[""]; ok {
return s.addAnswersUnderNCValue(m, "", basename, rootname, qtype, res)
return s.addAnswersUnderNCValue(m, "", basename, rootname, qtype, res, depth+1)
}
}
@ -273,28 +376,21 @@ func (s *Server) addAnswersUnderNCValue(ncv *ncValue, subname, basename, rootnam
res.Answer = append(res.Answer, toAdd[i])
}
if len(res.Answer) > 0 {
now := time.Now()
rrsig := &dns.RRSIG {
Algorithm: dns.RSASHA256,
Expiration: uint32(now.Add(time.Duration(5)*time.Minute).Unix()),
Inception: uint32(now.Unix()),
KeyTag: s.zsk.KeyTag(),
SignerName: rootname + ".",
if qtype != dns.TypeDS {
for i := range toAddAuthority {
res.Ns = append(res.Ns, toAddAuthority[i])
}
err := rrsig.Sign(s.zskPrivate, res.Answer)
if err != nil {
return err
}
res.Answer = append(res.Answer, rrsig)
}
return nil
}
func (s *Server) addAnswersUnderDomain(d *Domain, subname, basename, rootname string, qtype uint16, res *dns.Msg) error {
return s.addAnswersUnderNCValue(d.ncv, subname, basename, rootname, qtype, res)
err := s.addAnswersUnderNCValue(d.ncv, subname, basename, rootname, qtype, res, 0)
if err == ErrNoResults {
err = nil
}
return err
}
func (s *Server) determineDomain(qname string) (subname, basename, rootname string, err error) {
@ -310,6 +406,11 @@ func (s *Server) determineDomain(qname string) (subname, basename, rootname stri
// scanning for rootname
if v == "bit" {
if i == 0 {
// i is already zero, so we have something like bit.x.y.z.
rootname = qname
return
}
rootname = strings.Join(parts[i:len(parts)], ".")
basename = parts[i-1]
subname = strings.Join(parts[0:i-1], ".")
@ -317,64 +418,300 @@ func (s *Server) determineDomain(qname string) (subname, basename, rootname stri
}
}
err = fmt.Errorf("not a namecoin domain")
err = fmt.Errorf("not a namecoin domain: ", qname)
return
}
func (s *Server) addMetaAnswers(subname, basename, rootname string, qtype uint16, res *dns.Msg) error {
switch subname {
case "this":
switch qtype {
case dns.TypeA, dns.TypeANY:
res.Answer = append(res.Answer, &dns.A {
Hdr: dns.RR_Header {
Name: subname + "." + basename + "." + rootname + ".",
Ttl: 86400,
Class: dns.ClassINET,
Rrtype: dns.TypeA,
},
A: net.IPv4(127,127,127,127),
})
default:
}
default:
}
return nil
}
func (s *Server) addRootAnswers(rootname string, qtype uint16, res *dns.Msg) error {
useKSK := false
//useKSK := false
s.zsk.Hdr.Name = rootname + "."
switch qtype {
case dns.TypeDNSKEY:
res.Answer = append(res.Answer, s.ksk)
res.Answer = append(res.Answer, &s.zsk)
useKSK = true
if qtype != dns.TypeNS && qtype != dns.TypeDNSKEY {
soa := &dns.SOA {
Hdr: dns.RR_Header {
Name: rootname + ".",
Ttl: 86400,
Class: dns.ClassINET,
Rrtype: dns.TypeSOA,
},
Ns: "this.x--nmc.bit.",
Mbox: ".",
Serial: 1,
Refresh: 600,
Retry: 600,
Expire: 7200,
Minttl: 600,
}
if qtype == dns.TypeSOA || qtype == dns.TypeANY {
res.Answer = append(res.Answer, soa)
} else {
res.Ns = append(res.Ns, soa)
}
}
if qtype == dns.TypeNS || qtype == dns.TypeANY {
res.Answer = append(res.Answer, &dns.NS {
Hdr: dns.RR_Header {
Name: rootname + ".",
Ttl: 86400,
Class: dns.ClassINET,
Rrtype: dns.TypeNS,
},
Ns: "this.x--nmc.bit.",
})
}
if qtype == dns.TypeDNSKEY || qtype == dns.TypeANY {
res.Answer = append(res.Answer, s.ksk)
res.Answer = append(res.Answer, &s.zsk)
//useKSK = true
}
log.Info("addRootAnswers/sr")
/*err := s.signResponse(res, useKSK, rootname)
if err != nil {
log.Infoe(err, "/sr")
return err
}*/
log.Info("done sr")
return nil
}
func (s *Server) signRRs(rra []dns.RR, useKSK bool, rootname string) (dns.RR, error) {
if len(rra) == 0 {
return nil, fmt.Errorf("no RRs to such")
}
now := time.Now()
rrsig := &dns.RRSIG {
Hdr: dns.RR_Header { Ttl: rra[0].Header().Ttl, },
Algorithm: dns.RSASHA256,
Expiration: uint32(now.Add(time.Duration(10)*time.Minute).Unix()),
Inception: uint32(now.Unix()),
SignerName: rootname + ".",
}
pk := s.zskPrivate
if useKSK {
pk = s.kskPrivate
rrsig.KeyTag = s.ksk.KeyTag()
} else {
rrsig.KeyTag = s.zsk.KeyTag()
}
err := rrsig.Sign(pk, rra)
if err != nil {
return nil, err
}
return rrsig, nil
}
func shouldSignType(t uint16) bool {
switch t {
case dns.TypeOPT:
return false
default:
return true
}
}
func (s *Server) signResponseSection(rra *[]dns.RR, useKSK bool, rootname string) error {
if len(*rra) == 0 {
return nil
}
i := 0
a := []dns.RR{}
pt := (*rra)[0].Header().Rrtype
t := uint16(0)
origrra := *rra
for i < len(origrra) {
for i < len(origrra) {
t = (*rra)[i].Header().Rrtype
if t != pt {
break
}
if len(res.Answer) > 0 {
now := time.Now()
rrsig := &dns.RRSIG {
Algorithm: dns.RSASHA256,
Expiration: uint32(now.Add(time.Duration(5)*time.Minute).Unix()),
Inception: uint32(now.Unix()),
KeyTag: s.zsk.KeyTag(),
SignerName: rootname + ".",
a = append(a, origrra[i])
i++
}
pk := s.zskPrivate
if useKSK {
pk = s.kskPrivate
rrsig.KeyTag = s.ksk.KeyTag()
if shouldSignType(t) {
srr, err := s.signRRs(a, useKSK, rootname)
if err != nil {
return err
}
*rra = append(*rra, srr)
}
err := rrsig.Sign(pk, res.Answer)
pt = t
a = []dns.RR{}
}
return nil
}
func useDNSSEC(msg *dns.Msg) bool {
opt := msg.IsEdns0()
if opt == nil {
return false
}
return opt.Do()
}
func (s *Server) signResponse(res *dns.Msg, useKSK bool, rootname string) error {
if !useDNSSEC(res) {
return nil
}
for _, r := range []*[]dns.RR { &res.Answer, &res.Ns, &res.Extra } {
err := s.signResponseSection(r, useKSK, rootname)
if err != nil {
log.Infoe(err, "fail signResponse")
return err
}
}
log.Info("done signResponse")
return nil
}
var ErrNoRoot = fmt.Errorf("invalid domain name, no root")
var allPossibleTypes []uint16 = []uint16 {
dns.TypeSOA, dns.TypeDNSKEY, dns.TypeDS,
dns.TypeNS, //dns.TypeCNAME,
dns.TypeA, dns.TypeAAAA, dns.TypeMX, dns.TypeSRV, dns.TypeTXT,
}
type uint16Slice []uint16
func (p uint16Slice) Len() int { return len(p) }
func (p uint16Slice) Less(i, j int) bool { return p[i] < p[j] }
func (p uint16Slice) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
func (s *Server) addNSEC3RR(basename, rootname, qname string, qtype uint16, res *dns.Msg) error {
// Map of what possibly exists
m := map[uint16]struct{}{}
for _, rr := range res.Answer {
// Definitely exists
m[rr.Header().Rrtype] = struct{}{}
}
// If qtype is ANY, the only record types which exist are those we found above.
if qtype != dns.TypeANY {
// Any record type which wasn't the one we asked for might exist.
for _, t := range allPossibleTypes {
if t != qtype {
m[t] = struct{}{}
}
}
}
res.Answer = append(res.Answer, rrsig)
tbm := []uint16{}
for t, _ := range m {
tbm = append(tbm, t)
}
// The DNS library is buggy unless tbm is sorted.
sort.Sort(uint16Slice(tbm))
log.Info("NSEC3: qname=", qname, " base=", basename, " root=", rootname)
nsr1n := dns.HashName(qname, dns.SHA1, 1, "8F")
nsr1nn := stepName(nsr1n)
nsr1 := &dns.NSEC3 {
Hdr: dns.RR_Header {
Name: nsr1n + "." + rootname + ".",
Rrtype: dns.TypeNSEC3,
Class: dns.ClassINET,
Ttl: 600,
},
Hash: dns.SHA1,
Flags: 0,
Iterations: 1,
SaltLength: 1,
Salt: "8F",
HashLength: uint8(len(nsr1nn)),
NextDomain: nsr1nn,
TypeBitMap: tbm,
}
res.Ns = append(res.Ns, nsr1)
return nil
}
func (s *Server) addAnswers(qname string, qtype uint16, res *dns.Msg) error {
subname, basename, rootname, err := s.determineDomain(qname)
if err != nil {
log.Infoe(err, "cannot determine domain name")
return err
func (s *Server) addNSEC(basename, rootname, qname string, qtype uint16, res *dns.Msg) error {
if !useDNSSEC(res) {
return nil
}
// NSEC replies should be given in the following circumstances:
//
// - No ANSWER SECTION responses for type requested, qtype != DS
// - No ANSWER SECTION responses for type requested, qtype == DS
// - Wildcard, no data responses
// - Wildcard, data response
// - Name error response
// - Direct NSEC request
if len(res.Answer) == 0 /*&& qtype != dns.TypeDS*/ {
log.Info("adding NSEC3")
err := s.addNSEC3RR(basename, rootname, qname, qtype, res)
if err != nil {
return err
}
/*err = s.addNSEC3RR("*", rootname, "*." + qname, qtype, res)
if err != nil {
return err
}*/
}
//log.Info("DD: sub=", subname, " base=", basename, " root=", rootname)
//if len(toAdd) == 0 && (len(toAddAuthority) == 0 || qtype == dns.TypeDS) {
//}
return nil
}
func (s *Server) addAnswersMain(subname, basename, rootname, qname string, qtype uint16, res *dns.Msg) error {
if rootname == "" {
return fmt.Errorf("invalid domain name, no root")
return ErrNoRoot
}
if basename == "x--nmc" {
return s.addMetaAnswers(subname, basename, rootname, qtype, res)
}
if subname == "" && basename == "" {
return s.addRootAnswers(rootname, qtype, res)
err := s.addRootAnswers(rootname, qtype, res)
return err
}
ncname, err := toNamecoinName(basename)
@ -398,11 +735,45 @@ func (s *Server) addAnswers(qname string, qtype uint16, res *dns.Msg) error {
return nil
}
func (s *Server) addAnswers(qname string, qtype uint16, res *dns.Msg) error {
subname, basename, rootname, err := s.determineDomain(qname)
if err != nil {
log.Infoe(err, "cannot determine domain name")
return err
}
log.Info("DD: sub=", subname, " base=", basename, " root=", rootname)
err = s.addAnswersMain(subname, basename, rootname, qname, qtype, res)
if err != nil {
return err
}
err = s.addNSEC(basename, rootname, qname, qtype, res)
if err != nil {
log.Infoe(err, "cannot add NSEC")
return err
}
useKSK := (qtype == dns.TypeDNSKEY)
err = s.signResponse(res, useKSK, rootname)
if err != nil {
log.Infoe(err, "cannot sign response")
return err
}
return nil
}
func (s *Server) handle(rw dns.ResponseWriter, req *dns.Msg) {
res := dns.Msg{}
res.SetReply(req)
res.Authoritative = true
res.Compress = true
opt := req.IsEdns0()
if opt != nil {
res.Extra = append(res.Extra, opt)
}
for _, q := range req.Question {
if q.Qclass != dns.ClassINET && q.Qclass != dns.ClassANY {
@ -413,6 +784,9 @@ func (s *Server) handle(rw dns.ResponseWriter, req *dns.Msg) {
if err == ErrNoSuchDomain {
res.SetRcode(req, dns.RcodeNameError)
break
} else if err == ErrNoRoot {
res.SetRcode(req, dns.RcodeRefused)
break
} else if err != nil {
// TODO
log.Infoe(err, "Could not determine answer for query, doing SERVFAIL.")
@ -421,6 +795,7 @@ func (s *Server) handle(rw dns.ResponseWriter, req *dns.Msg) {
}
}
//log.Info("response: ", res.String())
err := rw.WriteMsg(&res)
log.Infoe(err, "Couldn't write response: " + res.String())
}
@ -430,10 +805,10 @@ func (s *Server) Run() {
s.mux.HandleFunc(".", s.handle)
// key setup
kskf, err := os.Open("Kbit.+008+04050.key")
kskf, err := os.Open("Kbit.dt.qien.net.+008+60970.key")
log.Fatale(err)
kskRR, err := dns.ReadRR(kskf, "Kbit.+008+04050.key")
kskRR, err := dns.ReadRR(kskf, "Kbit.dt.qien.net.+008+60970.key")
log.Fatale(err)
ksk, ok := kskRR.(*dns.DNSKEY)
@ -444,10 +819,10 @@ func (s *Server) Run() {
s.ksk = ksk
kskPrivatef, err := os.Open("Kbit.+008+04050.private")
kskPrivatef, err := os.Open("Kbit.dt.qien.net.+008+60970.private")
log.Fatale(err)
s.kskPrivate, err = s.ksk.ReadPrivateKey(kskPrivatef, "Kbit.+008+04050.private")
s.kskPrivate, err = s.ksk.ReadPrivateKey(kskPrivatef, "Kbit.dt.qien.net.+008+60970.private")
log.Fatale(err)
s.zsk.Hdr.Rrtype = dns.TypeDNSKEY
@ -468,6 +843,8 @@ func (s *Server) Run() {
s.nc.Server = "127.0.0.1:8336"
s.cache.MaxEntries = 1000
log.Info("Ready.")
// wait
sig := make(chan os.Signal)
signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)

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