3 ms·

> Modern implementations must support a range of TLS protocol versions (from legacy TLS 1.0 to current TLS 1.3) So this statement is strange considering "moder

> Modern implementations must support a range of TLS protocol versions (from legacy TLS 1.0 to current TLS 1.3) So this statement is strange considering "modern" security standards either nudge you (or demand) to deprecate anything that isn't v1.3 or v1.2. If the implementation is "modern" why would I allow 1.0 ? This seems like a HA-Proxy problem. They ought to maintain support for geriatric TLS versions on a dedicated release branch connected to a support-model that nudges their client into updating by increasing their fees for maintaining that system. Not doing so means the vendor is part of the problem why we have slower adoption rates for 1.3 than we could otherwise have. It would have been cool to see AWS's s2n-tls (or s2n-quic https://github.com/aws/s2n-quic https://github.com/aws/s2n-quic) included in their benchmark. One of my all time favorite episode from the SCW podcast goes into the design decisions of s2n: The feeling's mutual: mTLS with Colm MacCárthaigh https://securitycryptographywhatever.com/2021/12/29/the-feeling-s-mutual-mtls-with-colm-maccarthaigh/ https://securitycryptographywhatever.com/2021/12/29/the-feel... From AWS: https://aws.amazon.com/security/opensource/cryptography/ https://aws.amazon.com/security/opensource/cryptography/ > "In 2015, AWS introduced s2n-tls, a fast open source implementation of the TLS protocol. The name "s2n", or "signal to noise," refers to the way encryption masks meaningful signals behind a facade of seemingly random noise. Since then, AWS has launched several other open source cryptographic libraries, including Amazon Corretto Crypto Provider (ACCP) and AWS Libcrypto (AWS-LC). AWS believes that open source benefits everyone, and we are committed to expanding our cryptographic and transport libraries to meet the evolving security needs of our customers." Here is a pdf that provides some performance results for s2n (sadly not s2n-quic): "Performance Analysis of SSL/TLS Crypto Libraries: Based on Operating Platform" https://bhu.ac.in/research_pub/jsr/Volumes/JSR_66_02_2022/12.pdf https://bhu.ac.in/research_pub/jsr/Volumes/JSR_66_02_2022/12...

owenthejumper 1y ago
AFAIK haproxy does not charge their users increased fees for legacy TLS. You would be shocked how much legacy software there is, requiring TLS 1.0. Not saying that is a good thing, just a reality…
eqvinox 1y ago
> If the implementation is "modern" why would I allow 1.0 ? Because there's a distinction between "using" (especially by default) and "implementing". The real world has millions (billions?) of devices that don't receive updates and yet still need to be talked to, in most cases luckily by a small set of communication partners. Would you rather have even the "modern" side of that conversation be forced to use some ancient SSL library? I'd rather have modern software, even if I'm forced to use an older protocol version by the other endpoint. Just disable it by default. And it's not like TLS 1.0 and 1.1 are somehow worse than cleartext communication. They're still encrypted transport protocols that take significant effort to break. That you shouldn't use them if at all possible doesn't mean that you can't use them if anything else is impossible.
- tialaramex 1y ago
  > And it's not like TLS 1.0 and 1.1 are somehow worse than cleartext communication. In reality humans can't actually do this nuance you're imagining, and so what happens is you're asked "is this secure?" and you say "Yes" meaning "Well it's not cleartext" and then it gets ripped wide open. HTTP in particular is like a dream protocol for cryptanalysis. If in 1990 you told researchers to imagine a protocol where clients will execute arbitrary numbers of requests to any server under somebody else's control (Javascript) and where values you control are concatenated with secrets you want to steal (Cookies) they'd say that's nice for writing examples, but nobody would deploy such an amateur design in the real world. They would be dead wrong. But eh, we wrote an RFC telling you not to use these long obsolete protocol versions, and you're going to do it anyway, so, whatever.
  - eqvinox 1y ago
    > In reality humans can't actually do this nuance […] Luckily the cases that need this aren't normally about a wide user base, rather they only concern a bunch of developers and admins. Which is why I pointed out the default-off nature of this. > But eh, we wrote an RFC telling you not to use these long obsolete protocol versions, and you're going to do it anyway, so, whatever. You're losing audience with unnecessary hostility. Your post would've been much more effective with plain omitting this last paragraph.
toast0 1y ago
> This seems like a HA-Proxy problem. They ought to maintain support for geriatric TLS versions on a dedicated release branch connected to a support-model that nudges their client into updating by increasing their fees for maintaining that system. Not doing so means the vendor is part of the problem why we have slower adoption rates for 1.3 than we could otherwise have. If I understand what you're suggesting, it's that HAProxy should have their current public releases support only TLS 1.2 and 1.3, and a paid release that supports TLS 1.0-1.3 and that would encourge adoption of 1.3? I would expect those users who have a requirement for TLS 1.0 to stay on an old public free release that supports TLS 1.0-1.2 in that case. If upgrading to support 1.3 would mean dropping a requirement or paying money, who would do it? How does that increase adoption vs making it available with all the other versions in the free release? Some people might reevaluate their requirements given the choices, but if anything that pushes abandonment of TLS 1.0 more than adoption of TLS 1.3. I no longer have to support this kind of thing, but when you require dropping the old thing at the same time as supporting the new thing, you're forcing them to choose, and unless the choice is very clear, you'll have a large group of people that pick to support the old thing. IMHO, the differences between TLS 1.0,1.1, and 1.2 aren't so big that you can claim it's too hard to support them all, and dropping support for 1.0 and 1.1 on the server doesn't gain much security. 1.2 to 1.3 is a bigger change, if you wanted to only support 1.3, that's an argument to have, but I don't think that's a realistic position for a general purpose proxy at this point in time (it would certainly be a realistic configuration option though).
- rlnorthcutt 1y ago
  Actually this is a problem for anyone that either: - needs to rely on LTS versions - runs multi-threaded software (like HAProxy) - has real performance and scalability needs. Note on #2 above that there are other LB/RP projects that don't have a problem here because they chose to be single threaded. This means their performance is not greatly impacted. HAproxy is incredibly performant because the project chooses to prioritize performance. Also, as an open source project, we should applaud the efforts of the team to provide the best product possible and not just push everything of value into the commercial offering. Thats pretty rare these days.
wtarreau 1y ago
Just to be clear, we don't care at all about performance of 1.0. The tests resulting in the pretty telling graphs were done in 1.3 only, as that's what users care about.

owenthejumper 1y ago

AFAIK haproxy does not charge their users increased fees for legacy TLS. You would be shocked how much legacy software there is, requiring TLS 1.0. Not saying that is a good thing, just a reality…

eqvinox 1y ago

> If the implementation is "modern" why would I allow 1.0 ? Because there's a distinction between "using" (especially by default) and "implementing". The real world has millions (billions?) of devices that don't receive updates and yet still need to be talked to, in most cases luckily by a small set of communication partners. Would you rather have even the "modern" side of that conversation be forced to use some ancient SSL library? I'd rather have modern software, even if I'm forced to use an older protocol version by the other endpoint. Just disable it by default. And it's not like TLS 1.0 and 1.1 are somehow worse than cleartext communication. They're still encrypted transport protocols that take significant effort to break. That you shouldn't use them if at all possible doesn't mean that you can't use them if anything else is impossible.

tialaramex 1y ago
> And it's not like TLS 1.0 and 1.1 are somehow worse than cleartext communication. In reality humans can't actually do this nuance you're imagining, and so what happens is you're asked "is this secure?" and you say "Yes" meaning "Well it's not cleartext" and then it gets ripped wide open. HTTP in particular is like a dream protocol for cryptanalysis. If in 1990 you told researchers to imagine a protocol where clients will execute arbitrary numbers of requests to any server under somebody else's control (Javascript) and where values you control are concatenated with secrets you want to steal (Cookies) they'd say that's nice for writing examples, but nobody would deploy such an amateur design in the real world. They would be dead wrong. But eh, we wrote an RFC telling you not to use these long obsolete protocol versions, and you're going to do it anyway, so, whatever.
- eqvinox 1y ago
  > In reality humans can't actually do this nuance […] Luckily the cases that need this aren't normally about a wide user base, rather they only concern a bunch of developers and admins. Which is why I pointed out the default-off nature of this. > But eh, we wrote an RFC telling you not to use these long obsolete protocol versions, and you're going to do it anyway, so, whatever. You're losing audience with unnecessary hostility. Your post would've been much more effective with plain omitting this last paragraph.

toast0 1y ago

> This seems like a HA-Proxy problem. They ought to maintain support for geriatric TLS versions on a dedicated release branch connected to a support-model that nudges their client into updating by increasing their fees for maintaining that system. Not doing so means the vendor is part of the problem why we have slower adoption rates for 1.3 than we could otherwise have. If I understand what you're suggesting, it's that HAProxy should have their current public releases support only TLS 1.2 and 1.3, and a paid release that supports TLS 1.0-1.3 and that would encourge adoption of 1.3? I would expect those users who have a requirement for TLS 1.0 to stay on an old public free release that supports TLS 1.0-1.2 in that case. If upgrading to support 1.3 would mean dropping a requirement or paying money, who would do it? How does that increase adoption vs making it available with all the other versions in the free release? Some people might reevaluate their requirements given the choices, but if anything that pushes abandonment of TLS 1.0 more than adoption of TLS 1.3. I no longer have to support this kind of thing, but when you require dropping the old thing at the same time as supporting the new thing, you're forcing them to choose, and unless the choice is very clear, you'll have a large group of people that pick to support the old thing. IMHO, the differences between TLS 1.0,1.1, and 1.2 aren't so big that you can claim it's too hard to support them all, and dropping support for 1.0 and 1.1 on the server doesn't gain much security. 1.2 to 1.3 is a bigger change, if you wanted to only support 1.3, that's an argument to have, but I don't think that's a realistic position for a general purpose proxy at this point in time (it would certainly be a realistic configuration option though).

rlnorthcutt 1y ago
Actually this is a problem for anyone that either: - needs to rely on LTS versions - runs multi-threaded software (like HAProxy) - has real performance and scalability needs. Note on #2 above that there are other LB/RP projects that don't have a problem here because they chose to be single threaded. This means their performance is not greatly impacted. HAproxy is incredibly performant because the project chooses to prioritize performance. Also, as an open source project, we should applaud the efforts of the team to provide the best product possible and not just push everything of value into the commercial offering. Thats pretty rare these days.

wtarreau 1y ago

Just to be clear, we don't care at all about performance of 1.0. The tests resulting in the pretty telling graphs were done in 1.3 only, as that's what users care about.