学习golang sdk, 使用Fiat-Crypto来构建sm2曲线的generic实现

[emmansun]

从golang 1.19开始，golang sdk 对NIST曲线的纯golang实现都基于Fiat-Crypto来生成，来确保代码的一致性和正确性。

1. Fiat-Crypto
2. addchain

[emmansun]

https://github.com/emmansun/sm2fiat, 由于众所周知的原因，生成docker image fiat-crypto:v0.0.9花了很长时间。

[emmansun]

goos: windows
goarch: amd64
pkg: github.com/emmansun/sm2fiat
cpu: Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz
BenchmarkScalarBaseMult/SM2P256-6         	    3514	    346616 ns/op	    8408 B/op	     276 allocs/op
BenchmarkScalarBaseMult/OldSM2P256-6      	    1150	   1045606 ns/op	     619 B/op	      13 allocs/op

goos: windows
goarch: amd64
pkg: github.com/emmansun/sm2fiat
cpu: Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz
BenchmarkScalarMult/SM2P256-6         	    1015	   1171729 ns/op	   10352 B/op	     339 allocs/op
BenchmarkScalarMult/OldSM2P256-6      	     446	   2659460 ns/op	    1005 B/op	      17 allocs/op

goos: windows
goarch: amd64
pkg: github.com/emmansun/sm2fiat
cpu: Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz
BenchmarkMarshalUnmarshal/SM2P256/Uncompressed-6         	  317323	      3648 ns/op	     536 B/op	      12 allocs/op
BenchmarkMarshalUnmarshal/SM2P256/Compressed-6           	   13086	     91704 ns/op	    3961 B/op	     137 allocs/op
BenchmarkMarshalUnmarshal/OldSM2P256/Uncompressed-6      	  372056	      3265 ns/op	     896 B/op	      12 allocs/op
BenchmarkMarshalUnmarshal/OldSM2P256/Compressed-6        	   13580	     89549 ns/op	    4289 B/op	     133 allocs/op

[emmansun]

64 bits vs 32 bits

[emmansun]

golang SDK这个改动应该在1.19发布。

[emmansun]

今年十月取消支持golang 1.15后，会把https://github.com/emmansun/sm2fiat merge进来。