How to use rsa key pair for AES encryption and decryprion in golang

huangapple
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英文:

How to use rsa key pair for AES encryption and decryprion in golang

问题

我想生成RSA密钥对（公钥和私钥），然后将它们用于AES加密和解密，例如使用公钥进行加密，私钥进行解密。我写了一个简单的代码，但问题是当我运行这个代码时，我得到以下错误信息：

  1. crypto/aes: invalid key size 1639

我该如何解决这个问题？下面是我的加密代码：

  1. //生成私钥
  2. privateKey, err := rsa.GenerateKey(rand.Reader, 2014)
  3. if err != nil {
  4.     return
  5. }
  6. privateKeyDer := x509.MarshalPKCS1PrivateKey(privateKey)
  7. privateKeyBlock := pem.Block{
  8. 	Type:    "RSA PRIVATE KEY",
  9. 	Headers: nil,
  10. 	Bytes:   privateKeyDer,
  11. }
  12. privateKeyPem := string(pem.EncodeToMemory(&privateKeyBlock))
  14. //使用privateKeyPem进行加密
  15. text := []byte("My name is Astaxie")
  16. ciphertext, err := encrypt(text, []byte(privateKeyPem))
  17. if err != nil {
  18. 	// TODO: Properly handle error
  19. 	log.Fatal(err)
  20. }
  21. fmt.Printf("%s => %x\n", text, ciphertext)
  22.     
  23. //encrypt()函数的定义
  24. func encrypt(plaintext []byte, key []byte) ([]byte, error) {
  25. 	c, err := aes.NewCipher(key)
  26. 	if err != nil {
  27. 		return nil, err
  28. 	}
  30. 	gcm, err := cipher.NewGCM(c)
  31. 	if err != nil {
  32. 		return nil, err
  33. 	}
  35. 	nonce := make([]byte, gcm.NonceSize())
  36. 	if _, err = io.ReadFull(rand.Reader, nonce); err != nil {
  37. 		return nil, err
  38. 	}
  40. 	return gcm.Seal(nonce, nonce, plaintext, nil), nil
  41. }

请注意，我只翻译了你提供的代码部分，其他内容不包括在内。

英文:

I want to generate RSA key pair(public and private), and then use them for AES encryption and decryption .e.g. Public key for encryption and private key for decryption. I wrote a simple code for this, but the problem is that when I run this code I get this error:

  1. crypto/aes: invalid key size 1639

How can I resolve this problem ?? My encryption code is given below:

  1. //genrating private key
  2. privateKey, err := rsa.GenerateKey(rand.Reader, 2014)
  3. if err != nil {
  4.     return
  5. }
  6. privateKeyDer := x509.MarshalPKCS1PrivateKey(privateKey)
  7. privateKeyBlock := pem.Block{
  8. 	Type:    "RSA PRIVATE KEY",
  9. 	Headers: nil,
  10. 	Bytes:   privateKeyDer,
  11. }
  12. privateKeyPem := string(pem.EncodeToMemory(&privateKeyBlock))
  14. //using privateKeyPem for encryption
  15. text := []byte("My name is Astaxie")
  16. ciphertext, err := encrypt(text, []byte(privateKeyPem))
  17. if err != nil {
  18. 	// TODO: Properly handle error
  19. 	log.Fatal(err)
  20. }
  21. fmt.Printf("%s => %x\n", text, ciphertext)
  22.     
  23. //Definition of encrypt()
  24. func encrypt(plaintext []byte, key []byte) ([]byte, error) {
  25. 	c, err := aes.NewCipher(key)
  26. 	if err != nil {
  27. 		return nil, err
  28. 	}
  30. 	gcm, err := cipher.NewGCM(c)
  31. 	if err != nil {
  32. 		return nil, err
  33. 	}
  35. 	nonce := make([]byte, gcm.NonceSize())
  36. 	if _, err = io.ReadFull(rand.Reader, nonce); err != nil {
  37. 		return nil, err
  38. 	}
  40. 	return gcm.Seal(nonce, nonce, plaintext, nil), nil
  41. }

答案1

得分: 0

根据评论的建议，我搜索了"混合加密"。这个示例解决了我的问题。

英文:

As suggested in comments, i searched "hybrid cryptography" . And this example has solved my problem.

huangapple
  • 本文由 发表于 2017年4月18日 11:45:11
  • 转载请务必保留本文链接：https://go.coder-hub.com/43463221.html
  • aes
  • cryptography
  • encryption
  • go
  • rsa
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