Re: [Openvpn-devel] OpenVPN data channel format using 64bit IV

2024-01-23 Thread Arne Schwabe
- add protocol-flag aead-packet-format-v2 This signals the client to switch to the new data channel format. And finally have the data channel format. Since this format is negotiated like the cipher, there is no need to use another opcode if keep the peer id to just 24 bit. But we might want t

Re: [Openvpn-devel] OpenVPN data channel format using 64bit IV

2023-12-12 Thread Steffan Karger
Hi, I've been just lurking for a while, but you've managed to nerd-snipe me in responding. On 11-12-2023 13:31, Arne Schwabe wrote: with DCO and possible future hardware assisted OpenVPN acceleration we are approaching the point where 32 bit IVs are not cutting it any more. Agreed. Though t

[Openvpn-devel] OpenVPN data channel format using 64bit IV

2023-12-11 Thread Arne Schwabe
Hey, with DCO and possible future hardware assisted OpenVPN acceleration we are approaching the point where 32 bit IVs are not cutting it any more. To illustrate the problem, some back of the envelope math here: If we want to keep the current 3600s renogotiation interval and have a safety m