go threefish下载 - go threefish源码下载

go threefish

其他源码

v1.0.2

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三条鱼

Threefish 是一种可调整的分组密码，作为 Skein 哈希函数的一部分而开发，作为 NIST 哈希函数竞赛的提交材料。 Threefish 支持 256、512 和 1024 位的块大小。

完整的 Threefish 规范可在脚注¹中找到。

测试向量是从最新的参考实现中提取的² 。

加密和解密循环已展开，每次迭代包含八轮。这允许将旋转常数嵌入到代码中而无需重复。论文¹详细描述了这种做法，该论文还提供了详细的性能信息。

安装

要在 go 项目中作为依赖项安装：

 go get -U github.com/schultz-is/go-threefish

用法

该包中的密码实现实现了crypto/cipher cipher.Block接口。此库返回的实例可与支持 256、512 或 1024 位块大小的任何块密码模式一起使用。

 package main

import (
	"crypto/cipher"
	"crypto/rand"
	"fmt"

	"github.com/schultz-is/go-threefish"
)

func main () {
	message := make ([] byte , 128 )
	copy ( message , [] byte ( "secret message" ))

	// Assign a key. Generally this is derived from a known secret value. Often
	// a passphrase is derived using a key derivation function such as PBKDF2.
	key := make ([] byte , 128 )
	_ , err := rand . Read ( key )
	if err != nil {
		panic ( err )
	}

	// Assign a tweak value. This allows customization of the block cipher as in
	// the UBI block chaining mode. Support for the tweak value is not available
	// in the block ciphers modes supported by the standard library.
	tweak := make ([] byte , 16 )
	_ , err = rand . Read ( tweak )
	if err != nil {
		panic ( err )
	}

	// Instantiate and initialize a block cipher.
	block , err := threefish . New1024 ( key , tweak )
	if err != nil {
		panic ( err )
	}

	// When using CBC mode, the IV needs to be unique but does not need to be
	// secure. For this reason, it can be prepended to the ciphertext.
	ciphertext := make ([] byte , block . BlockSize () + len ( message ))
	iv := ciphertext [: block . BlockSize ()]
	_ , err = rand . Read ( iv )
	if err != nil {
		panic ( err )
	}

	mode := cipher . NewCBCEncrypter ( block , iv )
	mode . CryptBlocks ( ciphertext [ block . BlockSize ():], message )

	fmt . Printf ( "%x n " , ciphertext )
}

测试

可以运行单元测试，并可以通过提供的 Makefile 查看测试覆盖率。

 make test
make cover

标杆管理

可以运行基准测试，并可以通过提供的 Makefile 生成 CPU 和内存配置文件。

 make benchmark
go tool pprof cpu.prof
go tool pprof mem.prof

表现

2020 Mac Mini M1

 name                      time/op  speed
Threefish256/encrypt-8     85 ns   372 MB/s
Threefish256/decrypt-8    111 ns   287 MB/s
Threefish512/encrypt-8    234 ns   272 MB/s
Threefish512/decrypt-8    363 ns   175 MB/s
Threefish1024/encrypt-8   581 ns   220 MB/s
Threefish1024/decrypt-8   685 ns   186 MB/s

2019 MacBook Pro 2.3GHz 英特尔 i9

 name                      time/op  speed
Threefish256/encrypt-16   124 ns   259 MB/s
Threefish256/decrypt-16   156 ns   206 MB/s
Threefish512/encrypt-16   338 ns   189 MB/s
Threefish512/decrypt-16   310 ns   206 MB/s
Threefish1024/encrypt-16  804 ns   159 MB/s
Threefish1024/decrypt-16  778 ns   165 MB/s