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Cloak
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Make sure times are UTC and correctly subtract the timestamp window from the server time.

This commit is contained in:
notsure2 2020-11-23 05:14:03 +02:00
parent 0f6e0d37b5
commit e19e2ef355
2 changed files with 3 additions and 3 deletions
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2
internal/client/auth.go
View File

@ -33,7 +33,7 @@ func makeAuthenticationPayload(authInfo AuthInfo) (ret authenticationPayload, sh
copy(plaintext, authInfo.UID) copy(plaintext, authInfo.UID)
copy(plaintext[16:28], authInfo.ProxyMethod) copy(plaintext[16:28], authInfo.ProxyMethod)
plaintext[28] = authInfo.EncryptionMethod plaintext[28] = authInfo.EncryptionMethod
binary.BigEndian.PutUint64(plaintext[29:37], uint64(authInfo.WorldState.Now().Unix())) binary.BigEndian.PutUint64(plaintext[29:37], uint64(authInfo.WorldState.Now().UTC().Unix()))
binary.BigEndian.PutUint32(plaintext[37:41], authInfo.SessionId) binary.BigEndian.PutUint32(plaintext[37:41], authInfo.SessionId)
if authInfo.Unordered { if authInfo.Unordered {

4
internal/server/auth.go
View File

@ -50,7 +50,7 @@ func decryptClientInfo(fragments authFragments, serverTime time.Time) (info Clie
timestamp := int64(binary.BigEndian.Uint64(plaintext[29:37])) timestamp := int64(binary.BigEndian.Uint64(plaintext[29:37]))
clientTime := time.Unix(timestamp, 0) clientTime := time.Unix(timestamp, 0)
if !(clientTime.After(serverTime.Truncate(timestampTolerance)) && clientTime.Before(serverTime.Add(timestampTolerance))) { if !(clientTime.After(serverTime.Add(-timestampTolerance)) && clientTime.Before(serverTime.Add(timestampTolerance))) {
err = fmt.Errorf("%v: received timestamp %v", ErrTimestampOutOfWindow, timestamp) err = fmt.Errorf("%v: received timestamp %v", ErrTimestampOutOfWindow, timestamp)
return return
} }
@ -77,7 +77,7 @@ func AuthFirstPacket(firstPacket []byte, transport Transport, sta *State) (info
return return
} }
info, err = decryptClientInfo(fragments, sta.WorldState.Now()) info, err = decryptClientInfo(fragments, sta.WorldState.Now().UTC())
if err != nil { if err != nil {
log.Debug(err) log.Debug(err)
err = fmt.Errorf("%w: %v", ErrBadDecryption, err) err = fmt.Errorf("%w: %v", ErrBadDecryption, err)