Example #1
0
func (v *ClientSession) EncodeRequestHeader(header *protocol.RequestHeader, writer io.Writer) {
	timestamp := protocol.NewTimestampGenerator(protocol.NowTime(), 30)()
	account, err := header.User.GetTypedAccount()
	if err != nil {
		log.Error("VMess: Failed to get user account: ", err)
		return
	}
	idHash := v.idHash(account.(*vmess.InternalAccount).AnyValidID().Bytes())
	idHash.Write(timestamp.Bytes(nil))
	writer.Write(idHash.Sum(nil))

	buffer := make([]byte, 0, 512)
	buffer = append(buffer, Version)
	buffer = append(buffer, v.requestBodyIV...)
	buffer = append(buffer, v.requestBodyKey...)
	buffer = append(buffer, v.responseHeader, byte(header.Option))
	padingLen := dice.Roll(16)
	if header.Security.Is(protocol.SecurityType_LEGACY) {
		// Disable padding in legacy mode for a smooth transition.
		padingLen = 0
	}
	security := byte(padingLen<<4) | byte(header.Security)
	buffer = append(buffer, security, byte(0), byte(header.Command))
	buffer = header.Port.Bytes(buffer)

	switch header.Address.Family() {
	case v2net.AddressFamilyIPv4:
		buffer = append(buffer, AddrTypeIPv4)
		buffer = append(buffer, header.Address.IP()...)
	case v2net.AddressFamilyIPv6:
		buffer = append(buffer, AddrTypeIPv6)
		buffer = append(buffer, header.Address.IP()...)
	case v2net.AddressFamilyDomain:
		buffer = append(buffer, AddrTypeDomain, byte(len(header.Address.Domain())))
		buffer = append(buffer, header.Address.Domain()...)
	}

	if padingLen > 0 {
		pading := make([]byte, padingLen)
		rand.Read(pading)
		buffer = append(buffer, pading...)
	}

	fnv1a := fnv.New32a()
	fnv1a.Write(buffer)

	buffer = fnv1a.Sum(buffer)

	timestampHash := md5.New()
	timestampHash.Write(hashTimestamp(timestamp))
	iv := timestampHash.Sum(nil)
	aesStream := crypto.NewAesEncryptionStream(account.(*vmess.InternalAccount).ID.CmdKey(), iv)
	aesStream.XORKeyStream(buffer, buffer)
	writer.Write(buffer)

	return
}
Example #2
0
func (this *ClientSession) EncodeRequestHeader(header *protocol.RequestHeader, writer io.Writer) {
	timestamp := protocol.NewTimestampGenerator(protocol.NowTime(), 30)()
	account, err := header.User.GetTypedAccount()
	if err != nil {
		log.Error("VMess: Failed to get user account: ", err)
		return
	}
	idHash := this.idHash(account.(*vmess.InternalAccount).AnyValidID().Bytes())
	idHash.Write(timestamp.Bytes(nil))
	writer.Write(idHash.Sum(nil))

	buffer := make([]byte, 0, 512)
	buffer = append(buffer, Version)
	buffer = append(buffer, this.requestBodyIV...)
	buffer = append(buffer, this.requestBodyKey...)
	buffer = append(buffer, this.responseHeader, byte(header.Option), byte(0), byte(0), byte(header.Command))
	buffer = header.Port.Bytes(buffer)

	switch header.Address.Family() {
	case v2net.AddressFamilyIPv4:
		buffer = append(buffer, AddrTypeIPv4)
		buffer = append(buffer, header.Address.IP()...)
	case v2net.AddressFamilyIPv6:
		buffer = append(buffer, AddrTypeIPv6)
		buffer = append(buffer, header.Address.IP()...)
	case v2net.AddressFamilyDomain:
		buffer = append(buffer, AddrTypeDomain, byte(len(header.Address.Domain())))
		buffer = append(buffer, header.Address.Domain()...)
	}

	fnv1a := fnv.New32a()
	fnv1a.Write(buffer)

	buffer = fnv1a.Sum(buffer)

	timestampHash := md5.New()
	timestampHash.Write(hashTimestamp(timestamp))
	iv := timestampHash.Sum(nil)
	aesStream := crypto.NewAesEncryptionStream(account.(*vmess.InternalAccount).ID.CmdKey(), iv)
	aesStream.XORKeyStream(buffer, buffer)
	writer.Write(buffer)

	return
}