clash/transport/vmess/user.go
2021-05-13 22:19:34 +08:00

55 lines
1.1 KiB
Go

package vmess
import (
"bytes"
"crypto/md5"
"github.com/gofrs/uuid"
)
// ID cmdKey length
const (
IDBytesLen = 16
)
// The ID of en entity, in the form of a UUID.
type ID struct {
UUID *uuid.UUID
CmdKey []byte
}
// newID returns an ID with given UUID.
func newID(uuid *uuid.UUID) *ID {
id := &ID{UUID: uuid, CmdKey: make([]byte, IDBytesLen)}
md5hash := md5.New()
md5hash.Write(uuid.Bytes())
md5hash.Write([]byte("c48619fe-8f02-49e0-b9e9-edf763e17e21"))
md5hash.Sum(id.CmdKey[:0])
return id
}
func nextID(u *uuid.UUID) *uuid.UUID {
md5hash := md5.New()
md5hash.Write(u.Bytes())
md5hash.Write([]byte("16167dc8-16b6-4e6d-b8bb-65dd68113a81"))
var newid uuid.UUID
for {
md5hash.Sum(newid[:0])
if !bytes.Equal(newid.Bytes(), u.Bytes()) {
return &newid
}
md5hash.Write([]byte("533eff8a-4113-4b10-b5ce-0f5d76b98cd2"))
}
}
func newAlterIDs(primary *ID, alterIDCount uint16) []*ID {
alterIDs := make([]*ID, alterIDCount)
prevID := primary.UUID
for idx := range alterIDs {
newid := nextID(prevID)
alterIDs[idx] = &ID{UUID: newid, CmdKey: primary.CmdKey[:]}
prevID = newid
}
alterIDs = append(alterIDs, primary)
return alterIDs
}