xlcetc / cryptogm Goto Github PK

sm9curve包里更改了原bn256包中的多个参数，请问这些参数是怎么计算出来的？
我去比对了sm9的文档中指定的参数，只对上了order和p，那么其余参数是怎么得出的，能否提供些学习资料，谢谢！

I am trying to do some benchmark test between cryptogm with tjfoc/gmsm, But encounter an error 2020/07/23 15:40:32 duplicate symbol p256IsZero (types 1 and 1) in github.com/xlcetc/cryptogm/sm2curve and /usr/local/go/pkg/linux_amd64/crypto/elliptic.a(p256_asm_amd64.o) when I run test code below:

import (
	"crypto/rand"
	"testing"

	csm "github.com/xlcetc/cryptogm/sm/sm2"
)

func BenchmarkSM2_cryptogm_GenerateKey(b *testing.B) {
	for i := 0; i < b.N; i++ {
		csm.GenerateKey(rand.Reader)
	}
}

But It does succeed in a new clean mod and your test files. So I think it may cause by mod dependency, But I am not sure it's correct or not. Here's mod file.

module sample

go 1.13

require (
	github.com/arnaucube/go-snark v0.0.4
	github.com/google/go-cmp v0.5.1 // indirect
	github.com/pkg/errors v0.9.1 // indirect
	github.com/stretchr/testify v1.6.1
	github.com/tjfoc/gmsm v1.3.2
	github.com/xlcetc/cryptogm v0.0.0-20200714063742-a399bbd3158e
	golang.org/x/crypto v0.0.0-20200709230013-948cd5f35899
	gotest.tools v2.2.0+incompatible // indirect
)

OS: ubuntu 16.04
Go version: go version go1.13.5 linux/amd64

Do you know how to fix this or to avoid this problem?

Besides, the sm2 in tjfoc/gmsm works fine.

请问 本项目涉及的算法，例如sm9 是否有官方的数据来对比验证计算结果是否正确呢？

3q

Hello,

I'm trying to use another curve so I calculate new constants with genconsts.go but the code for calculating s and sMinus1Over2 is missing. How can I calculate those constants?

Thanks.

这个函数是做乘法吗，如果是的话为什么能表示g的r次方？