package tunnel
import (
"crypto/aes"
"crypto/cipher"
"crypto/md5"
"crypto/rand"
"crypto/rsa"
"crypto/sha1"
"encoding/binary"
"github.com/Lafeng/deblocus/exception"
"github.com/monnand/dhkx"
)
var (
UNSUPPORTED_CIPHER = exception.NewW("Unsupported cipher")
)
type cipherBuilder func(k, iv []byte) *XORCipherKit
type cipherDecr struct {
keyLen int
builder cipherBuilder
}
type cipherKit interface {
encrypt(dst, src []byte)
decrypt(dst, src []byte)
}
type XORCipherKit struct {
ERR_PING_TIMEOUT = 0xe
ERR_NEW_PING = 0xf
ERR_UNKNOWN = 0x0
)
const sid_max uint32 = 0xffff
var (
// [1, 0xfffe]
sid_seq uint32
bytePoolOnce sync.Once
bytePool *bytepool.BytePool
)
var (
ERR_DATA_TAMPERED = ex.NewW("data tampered")
)
// --------------------
// event_handler
// --------------------
type event byte
const (
evt_tokens = event(1)
)
type event_handler func(e event, msg ...interface{})
// --------------------
// idler
VERSION uint32
VER_STRING string
DEBUG bool
)
var (
// socks5 exceptions
INVALID_SOCKS5_HEADER = exception.New(0xff, "Invalid socks5 header")
INVALID_SOCKS5_REQUEST = exception.New(0x07, "Invalid socks5 request")
GENERAL_FAILURE = exception.New(0x01, "General failure")
HOST_UNREACHABLE = exception.New(0x04, "Host is unreachable")
)
var (
// D5 exceptions
INVALID_D5PARAMS = exception.NewW("Invalid D5Params")
D5SER_UNREACHABLE = exception.NewW("D5Server is unreachable")
VALIDATION_FAILED = exception.NewW("Validation failed")
NEGOTIATION_FAILED = exception.NewW("Negotiation failed")
DATATUN_SESSION = exception.NewW("DT")
INCONSISTENT_HASH = exception.NewW("Inconsistent hash")
INCOMPATIBLE_VERSION = exception.NewW("Incompatible version")
UNRECOGNIZED_REQ = exception.NewW("Unrecognized Request")
)
// len_inByte: first segment length of bytes, enum: 1,2,4
func ReadFullByLen(len_inByte int, reader io.Reader) (buf []byte, err error) {
lb := make([]byte, len_inByte)
_, err = io.ReadFull(reader, lb)
if err != nil {
return
package auth
import (
"bufio"
"github.com/Lafeng/deblocus/exception"
"os"
"strings"
)
var (
NO_SUCH_USER = exception.NewW("No such user")
AUTH_FAILED = exception.NewW("Auth failed")
UNIMPLEMENTED_AUTHSYS = exception.NewW("Unimplemented authsys")
INVALID_AUTH_CONF = exception.NewW("Invalid Auth config")
INVALID_AUTH_PARAMS = exception.NewW("Invalid Auth params")
)
type AuthSys interface {
Authenticate(input []byte) (bool, error)
AddUser(user *User) error
UserInfo(user string) (*User, error)
}
type User struct {
Name string
Pass string
}
func GetAuthSysImpl(proto string) (AuthSys, error) {
if strings.HasPrefix(proto, "file://") {
return NewFileAuthSys(proto[7:])
"regexp"
"sort"
"strconv"
"strings"
)
const (
SER_KEY_TYPE = "deblocus/SERVER-PRIVATEKEY"
USER_CREDENTIAL_TYPE = "deblocus/CLIENT-CREDENTIAL"
WORD_d5p = "D5P"
WORD_provider = "Provider"
SIZE_UNIT = "BKMG"
)
var (
FILE_NOT_FOUND = exception.NewW("File not found")
FILE_EXISTS = exception.NewW("File is already exists")
INVALID_D5P_FRAGMENT = exception.NewW("Invalid d5p fragment")
INVALID_D5C_FILE = exception.NewW("Invalid d5c file format")
INVALID_D5S_FILE = exception.NewW("Invalid d5s file format")
UNRECOGNIZED_SYMBOLS = exception.NewW("Unrecognized symbols")
UNRECOGNIZED_DIRECTIVES = exception.NewW("Unrecognized directives")
LOCAL_BIND_ERROR = exception.NewW("Local bind error")
CONF_MISS = exception.NewW("Missed config")
CONF_ERROR = exception.NewW("Error config")
)
// client
type D5ClientConf struct {
Listen string `importable:":9009"`
Verbose int `importable:"1"`
)
const (
DT_PING_INTERVAL = 110
RETRY_INTERVAL = time.Second * 5
REST_INTERVAL = RETRY_INTERVAL
)
const (
CLT_CLOSED int32 = -1
CLT_WORKING int32 = 0
CLT_PENDING int32 = 1
)
var (
ERR_REQ_TK_TIMEOUT = ex.NewW("Request token timeout")
ERR_REQ_TK_ABORTED = ex.NewW("Requst token aborted")
)
type Client struct {
mux *multiplexer
token []byte
nego *dbcCltNego
params *tunParams
lock sync.Locker
dtCnt int32
reqCnt int32
state int32
round int32
pendingConn *semaphore
pendingTK *semaphore