reassembleCryptoData reassembles CRYPTO frames into a contiguous buffer
(frames []CryptoFrame)
| 656 | |
| 657 | // reassembleCryptoData reassembles CRYPTO frames into a contiguous buffer |
| 658 | func reassembleCryptoData(frames []CryptoFrame) []byte { |
| 659 | if len(frames) == 0 { |
| 660 | return nil |
| 661 | } |
| 662 | |
| 663 | // Find the maximum extent of the data |
| 664 | var maxEnd uint64 |
| 665 | for _, f := range frames { |
| 666 | end := f.Offset + uint64(len(f.Data)) |
| 667 | if end > maxEnd { |
| 668 | maxEnd = end |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | // Create buffer and copy data |
| 673 | // Limit to reasonable size to prevent memory issues |
| 674 | if maxEnd > 16384 { |
| 675 | maxEnd = 16384 // Max 16KB for ClientHello |
| 676 | } |
| 677 | |
| 678 | buffer := make([]byte, maxEnd) |
| 679 | for _, f := range frames { |
| 680 | if f.Offset < maxEnd { |
| 681 | copyLen := uint64(len(f.Data)) |
| 682 | if f.Offset+copyLen > maxEnd { |
| 683 | copyLen = maxEnd - f.Offset |
| 684 | } |
| 685 | copy(buffer[f.Offset:], f.Data[:copyLen]) |
| 686 | } |
| 687 | } |
| 688 | |
| 689 | return buffer |
| 690 | } |
| 691 | |
| 692 | // parseTLSClientHello parses TLS 1.3 ClientHello. |
| 693 | func parseTLSClientHello(data []byte) (*handler.ClientHello, error) { |