Remember that P-256 carry bug a while back from @FiloSottile/@thecomp1ler/@Cloudflare ?
Here's the bug: https://github.com/golang/go/issues/20040 …
And here's what happen when you get a single bit wrong in a crypto algorithm: https://events.ccc.de/congress/2017/Fahrplan/events/9021.html …
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This should never have happened because nobody except Cloudflare-like users has any need for asm crypto routines. Asm implementations should always be off-by-default.
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Replying to @RichFelker @dgryski and
Every Cloudflare-like user is is any web server that serves any meaningful amount of traffic. You can't hope to come close to even 1Gb/s without using asm. Example: https://go-review.googlesource.com/c/go/+/10484 , before I wrote GCM in asm it could do 89.31MB/s. Hardly enough, even for home server.
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The idea that < 1Gbps is not meaningful amount of traffic is so... I don't even know where to begin. At least 99.999% of sites have no such need.
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