Go에서 RSA 키 쌍을 생성하는 방법: OpenSSL과 비교?

package main

import (
    "crypto/rand"
    "crypto/rsa"
    "crypto/x509"
    "encoding/pem"
    "fmt"
    "io/ioutil"
)

func main() {
    // Define filename and bit size
    filename := "key"
    bitSize := 4096

    // Generate RSA key
    key, err := rsa.GenerateKey(rand.Reader, bitSize)
    if err != nil {
        panic(err)
    }

    // Extract public key
    pub := key.Public()

    // Convert to PKCS#1 DER format
    keyPEM := pem.EncodeToMemory(
        &pem.Block{
            Type:  "RSA PRIVATE KEY",
            Bytes: x509.MarshalPKCS1PrivateKey(key),
        },
    )

    pubPEM := pem.EncodeToMemory(
        &pem.Block{
            Type:  "RSA PUBLIC KEY",
            Bytes: x509.MarshalPKCS1PublicKey(pub.(*rsa.PublicKey)),
        },
    )

    // Write keys to files
    err = ioutil.WriteFile(filename+".rsa", keyPEM, 0700)
    if err != nil {
        panic(err)
    }

    err = ioutil.WriteFile(filename+".rsa.pub", pubPEM, 0755)
    if err != nil {
        panic(err)
    }

    fmt.Println("RSA key pair generated and written to files.")
}

-----BEGIN RSA PRIVATE KEY-----
...
-----END RSA PRIVATE KEY-----

-----BEGIN RSA PUBLIC KEY-----
...
-----END RSA PUBLIC KEY-----