/
new_encrypted_msg.go
68 lines (61 loc) · 1.71 KB
/
new_encrypted_msg.go
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package mtproto
import (
"github.com/go-faster/errors"
"go.uber.org/zap"
"github.com/gotd/td/bin"
"github.com/gotd/td/internal/crypto"
"github.com/gotd/td/internal/proto"
)
func (c *Conn) newEncryptedMessage(id int64, seq int32, payload bin.Encoder, b *bin.Buffer) error {
s := c.session()
// TODO(tdakkota): Smarter gzip.
// 1) Generate Length() method for every encoder, to count length without encoding.
// 2) Re-use buffer instead of using yet one.
// 3) Do not send proto.GZIP if gzipped size is equal or bigger.
var (
d crypto.EncryptedMessageData
log = c.log
)
if c.compressThreshold <= 0 {
if obj, ok := payload.(interface{ TypeID() uint32 }); ok {
log = c.logWithTypeID(obj.TypeID())
}
d = crypto.EncryptedMessageData{
SessionID: s.ID,
Salt: s.Salt,
MessageID: id,
SeqNo: seq,
Message: payload,
}
} else {
payloadBuf := bufPool.Get()
defer bufPool.Put(payloadBuf)
if err := payload.Encode(payloadBuf); err != nil {
return errors.Wrap(err, "encode payload")
}
log = c.logWithType(payloadBuf)
if payloadBuf.Len() > c.compressThreshold {
d = crypto.EncryptedMessageData{
SessionID: s.ID,
Salt: s.Salt,
MessageID: id,
SeqNo: seq,
Message: proto.GZIP{Data: payloadBuf.Raw()},
}
} else {
d = crypto.EncryptedMessageData{
SessionID: s.ID,
Salt: s.Salt,
MessageID: id,
SeqNo: seq,
MessageDataLen: int32(payloadBuf.Len()),
MessageDataWithPadding: payloadBuf.Buf,
}
}
}
log.Debug("Request", zap.Int64("msg_id", id))
if err := c.cipher.Encrypt(s.Key, d, b); err != nil {
return errors.Wrap(err, "encrypt")
}
return nil
}