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x/crypto: curve25519 returns broken values #44643

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map0zle opened this issue Feb 26, 2021 · 2 comments
Closed

x/crypto: curve25519 returns broken values #44643

map0zle opened this issue Feb 26, 2021 · 2 comments

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@map0zle
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map0zle commented Feb 26, 2021

What version of Go are you using (go version)?

$ go version
go version go1.16 darwin/arm64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

go env Output
$ go env
GOARCH="arm64"

What did you do?

The value of the public key will be the same every time.
I think the reason is probably that the arm version is not supported.

func generateKeyPair() (privateKey, publicKey *[32]byte) {
	privateKey, publicKey = new([32]byte), new([32]byte)
	if _, err := rand.Read(privateKey[:]); err != nil {
		log.Fatal(err)
	}
	curve25519.ScalarBaseMult(privateKey, publicKey)
	return
}

result

private key >> L+V9o0fNYkMVKNqsX7spBzD/9oSvxM/C7ZCZX1jLO3Q=
public key >> AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=

What did you expect to see?

What did you see instead?

@gopherbot gopherbot added this to the Unreleased milestone Feb 26, 2021
@seankhliao
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Your order of arguments is wrong

@map0zle
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map0zle commented Feb 27, 2021

Hi @seankhliao,

What was I expecting?
It outputs the same value every time.
It worked on non-arm64.

What did you see instead?
As shown in PoC.

@golang golang locked and limited conversation to collaborators Feb 27, 2022
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