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：
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：
//生成私钥
privateKey, err := rsa.GenerateKey(rand.Reader, 2014)
if err != nil {
return
}
privateKeyDer := x509.MarshalPKCS1PrivateKey(privateKey)
privateKeyBlock := pem.Block{
Type: "RSA PRIVATE KEY",
Headers: nil,
Bytes: privateKeyDer,
}
privateKeyPem := string(pem.EncodeToMemory(&privateKeyBlock))
//使用privateKeyPem进行加密
text := []byte("My name is Astaxie")
ciphertext, err := encrypt(text, []byte(privateKeyPem))
if err != nil {
// TODO: Properly handle error
log.Fatal(err)
}
fmt.Printf("%s => %x\n", text, ciphertext)
//encrypt()函数的定义
func encrypt(plaintext []byte, key []byte) ([]byte, error) {
c, err := aes.NewCipher(key)
if err != nil {
return nil, err
}
gcm, err := cipher.NewGCM(c)
if err != nil {
return nil, err
}
nonce := make([]byte, gcm.NonceSize())
if _, err = io.ReadFull(rand.Reader, nonce); err != nil {
return nil, err
}
return gcm.Seal(nonce, nonce, plaintext, nil), nil
}
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:
crypto/aes: invalid key size 1639
How can I resolve this problem ?? My encryption code is given below:
//genrating private key
privateKey, err := rsa.GenerateKey(rand.Reader, 2014)
if err != nil {
return
}
privateKeyDer := x509.MarshalPKCS1PrivateKey(privateKey)
privateKeyBlock := pem.Block{
Type: "RSA PRIVATE KEY",
Headers: nil,
Bytes: privateKeyDer,
}
privateKeyPem := string(pem.EncodeToMemory(&privateKeyBlock))
//using privateKeyPem for encryption
text := []byte("My name is Astaxie")
ciphertext, err := encrypt(text, []byte(privateKeyPem))
if err != nil {
// TODO: Properly handle error
log.Fatal(err)
}
fmt.Printf("%s => %x\n", text, ciphertext)
//Definition of encrypt()
func encrypt(plaintext []byte, key []byte) ([]byte, error) {
c, err := aes.NewCipher(key)
if err != nil {
return nil, err
}
gcm, err := cipher.NewGCM(c)
if err != nil {
return nil, err
}
nonce := make([]byte, gcm.NonceSize())
if _, err = io.ReadFull(rand.Reader, nonce); err != nil {
return nil, err
}
return gcm.Seal(nonce, nonce, plaintext, nil), nil
}
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.
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