英文:
Encrypt the message with the key
问题
我需要使用公钥来加密消息"Message"，并将其转换为HEX编码的预接收数据，保存为一个名为ciphertext.txt的文件。我不需要生成公钥，我已经有一个现成的公钥。使用这个公钥，你需要加密消息。
以下是我能够完成的部分：
package main
import (
"crypto/rand"
"crypto/rsa"
"crypto/sha256"
"crypto/x509"
"encoding/pem"
"errors"
"log"
"os"
)
func main() {
publicKeyBytes, err := os.ReadFile("publicik.key")
if err != nil {
return
}
publicKey, err := decodePublicKey(publicKeyBytes)
if err != nil {
return
}
plaintext := []byte("Message")
ciphertext, err := rsa.EncryptOAEP(sha256.New(), rand.Reader, publicKey, plaintext, nil)
if err != nil {
return
}
log.Printf("%x", ciphertext)
privateKeyBytes, err := os.ReadFile("private.key")
if err != nil {
return
}
privateKey, err := decodePrivateKey(privateKeyBytes)
if err != nil {
return
}
decryptedtext, err := rsa.DecryptOAEP(sha256.New(), rand.Reader, privateKey, ciphertext, nil)
if err != nil {
return
}
log.Printf("%s", decryptedtext)
}
func decodePublicKey(key []byte) (*rsa.PublicKey, error) {
block, _ := pem.Decode(key)
if block == nil {
return nil, errors.New("can't decode pem block")
}
publicKey, err := x509.ParsePKCS1PublicKey(block.Bytes)
if err != nil {
return nil, err
}
return publicKey, nil
}
func decodePrivateKey(key []byte) (*rsa.PrivateKey, error) {
block, _ := pem.Decode(key)
if block == nil {
return nil, errors.New("can't decode pem block")
}
privateKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
return nil, err
}
return privateKey, nil
}
然后我不知道如何解决这个问题？请帮助解决这个问题。
英文:
I need to use a public key to encrypt the message "Message" and save it as a file ciphertext.txt by converting pre-received data in HEX encoding. I do not need the public key to be generated, I already have a ready-made public key. Using this public key, you need to encrypt the message.
Here's what I was able to do:
package main
import (
"crypto/rand"
"crypto/rsa"
"crypto/sha256"
"crypto/x509"
"encoding/pem"
"errors"
"log"
"os"
)
func main() {
publicKeyBytes, err := os.ReadFile("publicik.key")
if err!= nil {
return
}
publicKey, err := decodepublicKey(publicKeyBytes)
if err != nil {
return
}
plaintext := []byte("Message")
ciphertext, err := rsa.EncryptOAEP(sha256.New(), rand.Reader, publicKey, plaintext, nil)
if err != nil {
return
}
log.Printf( "%x", ciphertext)
privateKeyBytes, err := os.ReadFile("private.key")
if err != nil {
return
}
privateKey, err := decodePrivateKey(privateKeyBytes)
if err != nil {
return
}
decryptedtext, err := rsa.DecryptOAEP(sha256.New(), rand.Reader, privateKey,ciphertext, nil)
if err != nil {
return
}
log.Printf("%s", decryptedtext)
}
func decodepublicKey(key []byte) (*rsa.PublicKey, error) {
block, _:= pem.Decode(key)
if block == nil {
return nil, errors.New("can't decode pem block")
}
publicKey, err := x509.ParsePKCS1PublicKey(block.Bytes)
if err != nil {
return nil, err
}
return publicKey, nil
}
func decodePrivateKey(key []byte) (*rsa.PrivateKey,error) { block, _ := pem.Decode(key)
if block == nil {
return nil, errors.New("can't decode pem block")
}
privateKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
return nil, err
}
return privateKey, nil
}
Then I don’t know how to solve this problem?
Please help with solving this problem
答案1
得分: 1
我调试了你的代码并发现了两个潜在问题：
- 请仔细检查你是否需要使用
x509.ParsePKCS1PublicKey()还是x509.ParsePKIXPublicKey()。这取决于你的公钥格式。更多信息请参考：https://stackoverflow.com/a/54775627/9698467 - 你可能需要在
decodepublicKey函数中进行类型断言来断定公钥的类型：return publicKey.(*rsa.PublicKey), nil。
英文:
I debugged your code and found 2 potential issues:
- Double check whether you need to use
x509.ParsePKCS1PublicKey()orx509.ParsePKIXPublicKey(). This depends on the format of your public key. More here: https://stackoverflow.com/a/54775627/9698467 - You may need to type assert the public key in your
decodepublicKeyfunction:return publicKey.(*rsa.PublicKey), nil.
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