Golang curve25519公钥生成器

huangapple
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英文:

Golang curve25519 pubkey generator

问题

我正在尝试实现curve25519算法用于公钥生成。但是我在如何从Go中的sha256编码字符串生成公钥方面遇到了困难。

我在Python中使用sha256编码字符串生成公钥没有问题：

  1. import hashlib
  2. import x25519
  4. example_string = 'kerielle'
  6. sha = hashlib.sha256(example_string.encode()).hexdigest()
  7. hash_bytes = bytes.fromhex(sha)
  8. public_key = x25519.scalar_base_mult(hash_bytes)
  9. hex_res = public_key.hex()
  11. print(hex_res)
  12. >>> 0fa065fcaedecef9aebb5c79ea1c613e82bc5534c4b139d71f3a1cb0cb956652

但是在Go中如何做到这一点呢？以下是一个基本示例：

  1. var publicKey [32]byte
  2. privateKey := (*[32]byte)(bytes.Repeat([]byte("1"), 32))
  3. curve25519.ScalarBaseMult(&publicKey, privateKey)
  5. fmt.Printf("%x\n", publicKey)
  6. >>> 04f5f29162c31a8defa18e6e742224ee806fc1718a278be859ba5620402b8f3a
英文:

I'm trying to implement the curve25519 algo for pubkey generation. But I got stuck on how to generate pubkey from sha256 encoded string in Go?

I have no problems with generation pubkey from sha256 encoded string via Python:

  1. import hashlib
  2. import x25519
  4. example_string = 'kerielle'
  6. sha = hashlib.sha256(example_string.encode()).hexdigest()
  7. hash_bytes = bytes.fromhex(sha)
  8. public_key = x25519.scalar_base_mult(hash_bytes)
  9. hex_res = public_key.hex()
  11. print(hex_res)
  12. >>> 0fa065fcaedecef9aebb5c79ea1c613e82bc5534c4b139d71f3a1cb0cb956652

But how to do the same in Go? Here basic example:

  1. var publicKey [32]byte
  2. privateKey := (*[32]byte)(bytes.Repeat([]byte("1"), 32))
  3. curve25519.ScalarBaseMult(&publicKey, privateKey)
  5. fmt.Printf("%x\n", publicKey)
  6. >>> 04f5f29162c31a8defa18e6e742224ee806fc1718a278be859ba5620402b8f3a

答案1

得分: 3

这只是复制了Python代码示例的结果，并考虑了curve25519.ScalarBaseMult()文档中的建议：

> 建议使用X25519函数与Basepoint一起使用，因为将数据复制到固定大小的数组中可能会导致意外的错误。

  1. package main
  3. import (
  4. 	"crypto/sha256"
  5. 	"fmt"
  6. 	"log"
  8. 	"golang.org/x/crypto/curve25519"
  9. )
  11. func main() {
  12. 	example_string := "kerielle"
  13. 	hash := sha256.Sum256([]byte(example_string))
  14. 	publicKey, err := curve25519.X25519(hash[:], curve25519.Basepoint)
  15. 	if err != nil {
  16. 		log.Fatalf("curve25519.X25519() 失败: %v", err)
  17. 	}
  18. 	fmt.Printf("%x\n", publicKey)
  19. }

输出：

  1. 0fa065fcaedecef9aebb5c79ea1c613e82bc5534c4b139d71f3a1cb0cb956652

Go Playground

英文:

This simply replicates the result of the Python code sample while also taking into account guidance from the curve25519.ScalarBaseMult() documentation:

> It is recommended to use the X25519 function with Basepoint instead,
> as copying into fixed size arrays can lead to unexpected bugs.

  1. package main
  3. import (
  4. 	"crypto/sha256"
  5. 	"fmt"
  6. 	"log"
  8. 	"golang.org/x/crypto/curve25519"
  9. )
  11. func main() {
  12. 	example_string := "kerielle"
  13. 	hash := sha256.Sum256([]byte(example_string))
  14. 	publicKey, err := curve25519.X25519(hash[:], curve25519.Basepoint)
  15. 	if err != nil {
  16. 		log.Fatalf("curve25519.X25519() failed: %v", err)
  17. 	}
  18. 	fmt.Printf("%x\n", publicKey)
  19. }

Output:

  1. 0fa065fcaedecef9aebb5c79ea1c613e82bc5534c4b139d71f3a1cb0cb956652

Go Playground

huangapple
  • 本文由 发表于 2022年1月16日 11:37:24
  • 转载请务必保留本文链接：https://go.coder-hub.com/70727192.html
  • cryptography
  • go
  • golang-migrate
  • python
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