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feat: implement signature Sign operations in constant time #317

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ivokub opened this issue Jan 26, 2023 · 1 comment

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ivokub commented Jan 26, 2023 •

edited

Right now the implementations are not constant-time. I think this may make signature packages less attractive for some use-cases.

Adding a place-holder issue if we ever want to take it on. It definitely has a big performance hit. Some links which may be useful:

https://go-review.googlesource.com/c/go/+/326012
https://go-review.googlesource.com/c/go/+/450055
https://github.com/cronokirby/saferith
https://www.bearssl.org/bigint.html
https://pkg.go.dev/filippo.io/bigmod (copy of Go internal constant-time bigmod library)

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doc: have a warning in signature packages that operations are not constant time #318

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gbotrel commented Jan 27, 2023

"It definitely has a big performance hit"

For this scope, maybe not that much.

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