mirrors/dnscrypt-proxy
1
0
Fork 0
mirror of https://github.com/DNSCrypt/dnscrypt-proxy.git synced 2025-04-04 21:57:44 +03:00
Code Issues Projects Releases Packages Wiki Activity

go-dnsstamps update

Browse source
This commit is contained in:
Frank Denis 2020-12-10 22:57:31 +01:00
parent 3ae3fe2f18
commit 54b0a5a18d
4 changed files with 110 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

110
vendor/github.com/jedisct1/go-dnsstamps/dnsstamps.go generated vendored
View file

@ -16,9 +16,11 @@ const DefaultPort = 443
type ServerInformalProperties uint64
const (
ServerInformalPropertyDNSSEC = ServerInformalProperties(1) << 0
ServerInformalPropertyNoLog = ServerInformalProperties(1) << 1
ServerInformalPropertyNoFilter = ServerInformalProperties(1) << 2
ServerInformalPropertyDNSSEC = ServerInformalProperties(1) << 0
ServerInformalPropertyNoLog = ServerInformalProperties(1) << 1
ServerInformalPropertyNoFilter = ServerInformalProperties(1) << 2
ServerInformalPropertyRelay = ServerInformalProperties(1) << 3
ServerInformalPropertyODoHTarget = ServerInformalProperties(1) << 4
)
type StampProtoType uint8
@ -28,6 +30,8 @@ const (
StampProtoTypeDNSCrypt = StampProtoType(0x01)
StampProtoTypeDoH = StampProtoType(0x02)
StampProtoTypeTLS = StampProtoType(0x03)
StampProtoTypeDoQ = StampProtoType(0x04)
StampProtoTypeODoH = StampProtoType(0x05)
StampProtoTypeDNSCryptRelay = StampProtoType(0x81)
)
@ -39,6 +43,12 @@ func (stampProtoType *StampProtoType) String() string {
return "DNSCrypt"
case StampProtoTypeDoH:
return "DoH"
case StampProtoTypeTLS:
return "TLS"
case StampProtoTypeDoQ:
return "QUIC"
case StampProtoTypeODoH:
return "oDoH"
case StampProtoTypeDNSCryptRelay:
return "Anonymized DNSCrypt"
default:
@ -90,6 +100,8 @@ func NewServerStampFromString(stampStr string) (ServerStamp, error) {
return newDNSCryptServerStamp(bin)
} else if bin[0] == uint8(StampProtoTypeDoH) {
return newDoHServerStamp(bin)
} else if bin[0] == uint8(StampProtoTypeODoH) {
return newODoHServerStamp(bin)
} else if bin[0] == uint8(StampProtoTypeDNSCryptRelay) {
return newDNSCryptRelayStamp(bin)
}
@ -158,7 +170,7 @@ func newDNSCryptServerStamp(bin []byte) (ServerStamp, error) {
return stamp, nil
}
// id(u8)=0x02 props addrLen(1) serverAddr hashLen(1) hash providerNameLen(1) providerName pathLen(1) path
// id(u8)=0x02 props addrLen(1) serverAddr hashLen(1) hash hostNameLen(1) hostName pathLen(1) path
func newDoHServerStamp(bin []byte) (ServerStamp, error) {
stamp := ServerStamp{Proto: StampProtoTypeDoH}
@ -239,6 +251,71 @@ func newDoHServerStamp(bin []byte) (ServerStamp, error) {
return stamp, nil
}
// id(u8)=0x05 props addrLen(1) serverAddr hostNameLen(1) hostName pathLen(1) path
func newODoHServerStamp(bin []byte) (ServerStamp, error) {
stamp := ServerStamp{Proto: StampProtoTypeODoH}
if len(bin) < 22 {
return stamp, errors.New("Stamp is too short")
}
stamp.Props = ServerInformalProperties(binary.LittleEndian.Uint64(bin[1:9]))
binLen := len(bin)
pos := 9
length := int(bin[pos])
if 1+length >= binLen-pos {
return stamp, errors.New("Invalid stamp")
}
pos++
stamp.ServerAddrStr = string(bin[pos : pos+length])
pos += length
length = int(bin[pos])
if 1+length >= binLen-pos {
return stamp, errors.New("Invalid stamp")
}
pos++
stamp.ProviderName = string(bin[pos : pos+length])
pos += length
length = int(bin[pos])
if length >= binLen-pos {
return stamp, errors.New("Invalid stamp")
}
pos++
stamp.Path = string(bin[pos : pos+length])
pos += length
if pos != binLen {
return stamp, errors.New("Invalid stamp (garbage after end)")
}
if len(stamp.ServerAddrStr) > 0 {
colIndex := strings.LastIndex(stamp.ServerAddrStr, ":")
bracketIndex := strings.LastIndex(stamp.ServerAddrStr, "]")
if colIndex < bracketIndex {
colIndex = -1
}
if colIndex < 0 {
colIndex = len(stamp.ServerAddrStr)
stamp.ServerAddrStr = fmt.Sprintf("%s:%d", stamp.ServerAddrStr, DefaultPort)
}
if colIndex >= len(stamp.ServerAddrStr)-1 {
return stamp, errors.New("Invalid stamp (empty port)")
}
ipOnly := stamp.ServerAddrStr[:colIndex]
portOnly := stamp.ServerAddrStr[colIndex+1:]
if _, err := strconv.ParseUint(portOnly, 10, 16); err != nil {
return stamp, errors.New("Invalid stamp (port range)")
}
if net.ParseIP(strings.TrimRight(strings.TrimLeft(ipOnly, "["), "]")) == nil {
return stamp, errors.New("Invalid stamp (IP address)")
}
}
return stamp, nil
}
// id(u8)=0x81 addrLen(1) serverAddr
func newDNSCryptRelayStamp(bin []byte) (ServerStamp, error) {
@ -287,6 +364,8 @@ func (stamp *ServerStamp) String() string {
return stamp.dnsCryptString()
} else if stamp.Proto == StampProtoTypeDoH {
return stamp.dohString()
} else if stamp.Proto == StampProtoTypeODoH {
return stamp.oDohString()
} else if stamp.Proto == StampProtoTypeDNSCryptRelay {
return stamp.dnsCryptRelayString()
}
@ -353,6 +432,29 @@ func (stamp *ServerStamp) dohString() string {
return "sdns://" + str
}
func (stamp *ServerStamp) oDohString() string {
bin := make([]uint8, 9)
bin[0] = uint8(StampProtoTypeODoH)
binary.LittleEndian.PutUint64(bin[1:9], uint64(stamp.Props))
serverAddrStr := stamp.ServerAddrStr
if strings.HasSuffix(serverAddrStr, ":"+strconv.Itoa(DefaultPort)) {
serverAddrStr = serverAddrStr[:len(serverAddrStr)-1-len(strconv.Itoa(DefaultPort))]
}
bin = append(bin, uint8(len(serverAddrStr)))
bin = append(bin, []uint8(serverAddrStr)...)
bin = append(bin, uint8(len(stamp.ProviderName)))
bin = append(bin, []uint8(stamp.ProviderName)...)
bin = append(bin, uint8(len(stamp.Path)))
bin = append(bin, []uint8(stamp.Path)...)
str := base64.RawURLEncoding.EncodeToString(bin)
return "sdns://" + str
}
func (stamp *ServerStamp) dnsCryptRelayString() string {
bin := make([]uint8, 1)
bin[0] = uint8(StampProtoTypeDNSCryptRelay)