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111 lines
2.3 KiB
111 lines
2.3 KiB
package vmess
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import (
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"crypto/hmac"
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"crypto/sha256"
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"hash/crc64"
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"strings"
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"sync"
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"github.com/xtls/xray-core/common/dice"
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"github.com/xtls/xray-core/common/errors"
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"github.com/xtls/xray-core/common/protocol"
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"github.com/xtls/xray-core/proxy/vmess/aead"
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)
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// TimedUserValidator is a user Validator based on time.
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type TimedUserValidator struct {
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sync.RWMutex
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users []*protocol.MemoryUser
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behaviorSeed uint64
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behaviorFused bool
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aeadDecoderHolder *aead.AuthIDDecoderHolder
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}
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// NewTimedUserValidator creates a new TimedUserValidator.
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func NewTimedUserValidator() *TimedUserValidator {
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tuv := &TimedUserValidator{
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users: make([]*protocol.MemoryUser, 0, 16),
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aeadDecoderHolder: aead.NewAuthIDDecoderHolder(),
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}
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return tuv
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}
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func (v *TimedUserValidator) Add(u *protocol.MemoryUser) error {
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v.Lock()
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defer v.Unlock()
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v.users = append(v.users, u)
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account := u.Account.(*MemoryAccount)
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if !v.behaviorFused {
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hashkdf := hmac.New(sha256.New, []byte("VMESSBSKDF"))
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hashkdf.Write(account.ID.Bytes())
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v.behaviorSeed = crc64.Update(v.behaviorSeed, crc64.MakeTable(crc64.ECMA), hashkdf.Sum(nil))
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}
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var cmdkeyfl [16]byte
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copy(cmdkeyfl[:], account.ID.CmdKey())
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v.aeadDecoderHolder.AddUser(cmdkeyfl, u)
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return nil
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}
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func (v *TimedUserValidator) GetAEAD(userHash []byte) (*protocol.MemoryUser, bool, error) {
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v.RLock()
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defer v.RUnlock()
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var userHashFL [16]byte
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copy(userHashFL[:], userHash)
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userd, err := v.aeadDecoderHolder.Match(userHashFL)
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if err != nil {
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return nil, false, err
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}
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return userd.(*protocol.MemoryUser), true, err
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}
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func (v *TimedUserValidator) Remove(email string) bool {
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v.Lock()
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defer v.Unlock()
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email = strings.ToLower(email)
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idx := -1
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for i, u := range v.users {
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if strings.EqualFold(u.Email, email) {
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idx = i
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var cmdkeyfl [16]byte
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copy(cmdkeyfl[:], u.Account.(*MemoryAccount).ID.CmdKey())
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v.aeadDecoderHolder.RemoveUser(cmdkeyfl)
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break
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}
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}
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if idx == -1 {
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return false
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}
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ulen := len(v.users)
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v.users[idx] = v.users[ulen-1]
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v.users[ulen-1] = nil
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v.users = v.users[:ulen-1]
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return true
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}
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func (v *TimedUserValidator) GetBehaviorSeed() uint64 {
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v.Lock()
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defer v.Unlock()
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v.behaviorFused = true
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if v.behaviorSeed == 0 {
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v.behaviorSeed = dice.RollUint64()
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}
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return v.behaviorSeed
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}
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var ErrNotFound = errors.New("Not Found")
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var ErrTainted = errors.New("ErrTainted")
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