mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-09-14 07:58:16 -04:00
91 lines
2.9 KiB
Go
91 lines
2.9 KiB
Go
package handshake
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
"errors"
|
|
"fmt"
|
|
|
|
"v2ray.com/core/external/github.com/lucas-clemente/quic-go/internal/protocol"
|
|
"v2ray.com/core/external/github.com/lucas-clemente/quic-go/internal/utils"
|
|
)
|
|
|
|
const quicTLSExtensionType = 0xffa5
|
|
|
|
type clientHelloTransportParameters struct {
|
|
InitialVersion protocol.VersionNumber
|
|
Parameters TransportParameters
|
|
}
|
|
|
|
func (p *clientHelloTransportParameters) Marshal() []byte {
|
|
const lenOffset = 4
|
|
b := &bytes.Buffer{}
|
|
utils.BigEndian.WriteUint32(b, uint32(p.InitialVersion))
|
|
b.Write([]byte{0, 0}) // length. Will be replaced later
|
|
p.Parameters.marshal(b)
|
|
data := b.Bytes()
|
|
binary.BigEndian.PutUint16(data[lenOffset:lenOffset+2], uint16(len(data)-lenOffset-2))
|
|
return data
|
|
}
|
|
|
|
func (p *clientHelloTransportParameters) Unmarshal(data []byte) error {
|
|
if len(data) < 6 {
|
|
return errors.New("transport parameter data too short")
|
|
}
|
|
p.InitialVersion = protocol.VersionNumber(binary.BigEndian.Uint32(data[:4]))
|
|
paramsLen := int(binary.BigEndian.Uint16(data[4:6]))
|
|
data = data[6:]
|
|
if len(data) != paramsLen {
|
|
return fmt.Errorf("expected transport parameters to be %d bytes long, have %d", paramsLen, len(data))
|
|
}
|
|
return p.Parameters.unmarshal(data, protocol.PerspectiveClient)
|
|
}
|
|
|
|
type encryptedExtensionsTransportParameters struct {
|
|
NegotiatedVersion protocol.VersionNumber
|
|
SupportedVersions []protocol.VersionNumber
|
|
Parameters TransportParameters
|
|
}
|
|
|
|
func (p *encryptedExtensionsTransportParameters) Marshal() []byte {
|
|
b := &bytes.Buffer{}
|
|
utils.BigEndian.WriteUint32(b, uint32(p.NegotiatedVersion))
|
|
b.WriteByte(uint8(4 * len(p.SupportedVersions)))
|
|
for _, v := range p.SupportedVersions {
|
|
utils.BigEndian.WriteUint32(b, uint32(v))
|
|
}
|
|
lenOffset := b.Len()
|
|
b.Write([]byte{0, 0}) // length. Will be replaced later
|
|
p.Parameters.marshal(b)
|
|
data := b.Bytes()
|
|
binary.BigEndian.PutUint16(data[lenOffset:lenOffset+2], uint16(len(data)-lenOffset-2))
|
|
return data
|
|
}
|
|
|
|
func (p *encryptedExtensionsTransportParameters) Unmarshal(data []byte) error {
|
|
if len(data) < 5 {
|
|
return errors.New("transport parameter data too short")
|
|
}
|
|
p.NegotiatedVersion = protocol.VersionNumber(binary.BigEndian.Uint32(data[:4]))
|
|
numVersions := int(data[4])
|
|
if numVersions%4 != 0 {
|
|
return fmt.Errorf("invalid length for version list: %d", numVersions)
|
|
}
|
|
numVersions /= 4
|
|
data = data[5:]
|
|
if len(data) < 4*numVersions+2 /*length field for the parameter list */ {
|
|
return errors.New("transport parameter data too short")
|
|
}
|
|
p.SupportedVersions = make([]protocol.VersionNumber, numVersions)
|
|
for i := 0; i < numVersions; i++ {
|
|
p.SupportedVersions[i] = protocol.VersionNumber(binary.BigEndian.Uint32(data[:4]))
|
|
data = data[4:]
|
|
}
|
|
paramsLen := int(binary.BigEndian.Uint16(data[:2]))
|
|
data = data[2:]
|
|
if len(data) != paramsLen {
|
|
return fmt.Errorf("expected transport parameters to be %d bytes long, have %d", paramsLen, len(data))
|
|
}
|
|
return p.Parameters.unmarshal(data, protocol.PerspectiveServer)
|
|
}
|