shadowsocks

package
v0.1.10 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Oct 26, 2021 License: AGPL-3.0 Imports: 38 Imported by: 1

Documentation

Index

Constants

View Source 
const (
	MaxNonceSize = 12
	ATypeIPv4    = 1
	ATypeDomain  = 3
	ATypeIpv6    = 4
)
View Source 
const (
	// BasicLen is the basic auth length of [salt][encrypted payload length][length tag][encrypted payload][payload tag]
	BasicLen      = 32 + 2 + 16
	TCPBufferSize = 32 * 1024
)
View Source 
const (
	DefaultNatTimeout = 3 * time.Minute
	DnsQueryTimeout   = 17 * time.Second // RFC 5452
)
View Source 
const (
	MTU = 65535
)
View Source 
const (
	TCPChunkMaxLen = (1 << (16 - 2)) - 1
)

Variables

View Source 
var (
	CiphersConf = map[string]CipherConf{
		"chacha20-ietf-poly1305": {KeyLen: 32, SaltLen: 32, NonceLen: 12, TagLen: 16, NewCipher: chacha20poly1305.New},
		"chacha20-poly1305":      {KeyLen: 32, SaltLen: 32, NonceLen: 12, TagLen: 16, NewCipher: chacha20poly1305.New},
		"aes-256-gcm":            {KeyLen: 32, SaltLen: 32, NonceLen: 12, TagLen: 16, NewCipher: NewGcm},
		"aes-128-gcm":            {KeyLen: 16, SaltLen: 16, NonceLen: 12, TagLen: 16, NewCipher: NewGcm},
	}
	ZeroNonce  [MaxNonceSize]byte
	ReusedInfo = []byte("ss-subkey")
)
View Source 
var (
	ErrFailAuth       = fmt.Errorf("fail to authenticate")
	ErrFailInitCihper = fmt.Errorf("fail to initiate cipher")
)
View Source 
var (
	ErrPassageAbuse = fmt.Errorf("passage abuse")
	ErrReplayAttack = fmt.Errorf("replay attack")
)
View Source 
var (
	ErrInvalidMetadata = errors.Errorf("invalid metadata")
)

Functions

func BytesSizeForMetadata 

func BytesSizeForMetadata(firstTwoByte []byte) (int, error)

func CalcPaddingLen 

func CalcPaddingLen(masterKey []byte, bodyWithoutAddr []byte, req bool) (length int)

func DecryptUDP 

func DecryptUDP(key Key, shadowBytes []byte) (plainText []byte, err error)

DecryptUDP will decrypt the data in place

func EVPBytesToKey 

func EVPBytesToKey(password string, keyLen int) (key []byte)

func EncryptUDPFromPool 

func EncryptUDPFromPool(key Key, b []byte) (shadowBytes []byte, err error)

EncryptUDPFromPool returns shadowBytes from pool. the shadowBytes MUST be put back.

func EncryptedPayloadLen 

func EncryptedPayloadLen(plainTextLen int, tagLen int) int

func IPToBin 

func IPToBin(ip net.IP) string

func LocalizePassages 

func LocalizePassages(passages []server.Passage) (psgs []Passage, manager *Passage)

func MD5Sum 

func MD5Sum(d []byte) []byte

func New 

func New(valueCtx context.Context, sweetLisaHost config.Lisa, arg server.Argument) (server.Server, error)

func NewGcm 

func NewGcm(key []byte) (cipher.AEAD, error)

Types

type CipherConf 

type CipherConf struct {
	KeyLen    int
	SaltLen   int
	NonceLen  int
	TagLen    int
	NewCipher func(key []byte) (cipher.AEAD, error)
}

func (*CipherConf) Verify 

func (conf *CipherConf) Verify(buf []byte, masterKey []byte, salt []byte, cipherText []byte, subKey *[]byte) ([]byte, bool)

type IPMTUTrie 

type IPMTUTrie struct {
	// contains filtered or unexported fields
}
var MTUTrie *IPMTUTrie

func NewIPMTUTrieFromInterfaces 

func NewIPMTUTrieFromInterfaces() (*IPMTUTrie, error)

func (*IPMTUTrie) GetMTU 

func (t *IPMTUTrie) GetMTU(ip net.IP) int

type Key 

type Key struct {
	CipherConf CipherConf
	MasterKey  []byte
}

type Metadata 

type Metadata struct {
	Type       MetadataType
	Hostname   string
	Port       uint16
	Cmd        MetadataCmd
	LenMsgBody uint32
}

func NewMetadata 

func NewMetadata(bytesMetadata []byte) (*Metadata, error)

func (*Metadata) Bytes 

func (meta *Metadata) Bytes() (b []byte)

func (*Metadata) BytesFromPool 

func (meta *Metadata) BytesFromPool() (b []byte)

type MetadataCmd 

type MetadataCmd uint8
const (
	MetadataCmdPing MetadataCmd = iota
	MetadataCmdSyncPassages
	MetadataCmdResponse
)

type MetadataType 

type MetadataType int
const (
	MetadataTypeReserved0 MetadataType = iota
	MetadataTypeIPv4
	MetadataTypeReserved2
	MetadataTypeDomain
	MetadataTypeIPv6
	// MetadataTypeMsg indicates it's a message from SweetLisa.
	// [MetadataType(1)][MetadataCmd(1)]
	MetadataTypeMsg
)

type Passage 

type Passage struct {
	server.Passage
	// contains filtered or unexported fields
}

func (*Passage) Use 

func (p *Passage) Use() (use server.PassageUse)

type SSConn 

type SSConn struct {
	net.Conn
	// contains filtered or unexported fields
}

func NewSSConn 

func NewSSConn(conn net.Conn, conf CipherConf, masterKey []byte) (crw *SSConn, err error)

func (*SSConn) Close 

func (c *SSConn) Close() error

func (*SSConn) GetTurn 

func (c *SSConn) GetTurn(addr Metadata, reqBody []byte) (resp []byte, err error)

GetTurn executes one msg request and get one response like HTTP

func (*SSConn) Read 

func (c *SSConn) Read(b []byte) (n int, err error)

func (*SSConn) ReadMetadata 

func (c *SSConn) ReadMetadata() (metadata *Metadata, err error)

func (*SSConn) Write 

func (c *SSConn) Write(b []byte) (n int, err error)

type Server 

type Server struct {
	// contains filtered or unexported fields
}

func (*Server) AddPassages 

func (s *Server) AddPassages(passages []server.Passage) (err error)

func (*Server) Close 

func (s *Server) Close() error

func (*Server) ContentionCheck added in v0.1.9 

func (s *Server) ContentionCheck(thisIP net.IP, passage *Passage) (err error)

func (*Server) GetOrBuildUCPConn 

func (s *Server) GetOrBuildUCPConn(lAddr net.Addr, data []byte) (rc *net.UDPConn, passage *Passage, plainText []byte, err error)

GetOrBuildUCPConn get a UDP conn from the mapping. plainText is from pool. Please MUST put it back.

func (*Server) GetUserContextOrInsert 

func (s *Server) GetUserContextOrInsert(userIP string) *UserContext

func (*Server) Listen 

func (s *Server) Listen(addr string) (err error)

func (*Server) ListenTCP 

func (s *Server) ListenTCP(addr string) (err error)

func (*Server) ListenUDP 

func (s *Server) ListenUDP(addr string) (err error)

func (*Server) Passages 

func (s *Server) Passages() (passages []server.Passage)

func (*Server) RemovePassages 

func (s *Server) RemovePassages(passages []server.Passage, alsoManager bool) (err error)

func (*Server) SyncPassages 

func (s *Server) SyncPassages(passages []server.Passage) (err error)

type UDPConn 

type UDPConn struct {
	Establishing chan struct{}

	*net.UDPConn
	// contains filtered or unexported fields
}

func NewUDPConn 

func NewUDPConn(conn *net.UDPConn) *UDPConn

type UDPConnMapping 

type UDPConnMapping struct {
	sync.Mutex
	// contains filtered or unexported fields
}

func NewUDPConnMapping 

func NewUDPConnMapping() *UDPConnMapping

func (*UDPConnMapping) Get 

func (m *UDPConnMapping) Get(key string) (conn *UDPConn, ok bool)

func (*UDPConnMapping) Insert 

func (m *UDPConnMapping) Insert(key string, val *net.UDPConn) *UDPConn

pass val=nil for stating it is establishing

func (*UDPConnMapping) Remove 

func (m *UDPConnMapping) Remove(key string)

type UserContext 

type UserContext lrulist.LruList

UserContext is the context of a user which indicates the preferred servers

func NewUserContext 

func NewUserContext(passages []Passage) *UserContext

func (*UserContext) Auth 

func (ctx *UserContext) Auth(probe func(Passage) ([]byte, bool)) (hit *Passage, content []byte)

func (*UserContext) Close 

func (ctx *UserContext) Close() error

func (*UserContext) Infra 

func (ctx *UserContext) Infra() *lrulist.LruList

type UserContextPool 

type UserContextPool lru.LRU

UserContextPool is a pool which saves the UserContext and eliminates unused UserContext over time

func (*UserContextPool) Infra 

func (pool *UserContextPool) Infra() *lru.LRU

Source Files

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