我正在使用crypto/rsa
,并尝试找到正确保存和加载密钥的方法。是否有正确的方法可以从[]byte
创建rsa.PrivateKey
。如果是这样,有没有办法为rsa.PublicKey
正确执行此操作?
非常感谢你。
答案 0 :(得分:58)
您需要某种格式来将密钥编组。可以在此处找到Go标准库支持的一种格式:http://golang.org/pkg/crypto/x509/#MarshalPKCS1PrivateKey
func MarshalPKCS1PrivateKey(key *rsa.PrivateKey) []byte
反函数是http://golang.org/pkg/crypto/x509/#ParsePKCS1PrivateKey。
func ParsePKCS1PrivateKey(der []byte) (key *rsa.PrivateKey, err error)
但是,将编组密钥编码为PEM文件是相对标准的。
pemdata := pem.EncodeToMemory(
&pem.Block{
Type: "RSA PRIVATE KEY",
Bytes: x509.MarshalPKCS1PrivateKey(key),
},
)
您可以找到完整的示例here。
答案 1 :(得分:23)
由于你问题的公钥部分没有得到解答,我遇到了同样的问题并解决了它,这里是:
请注意参数前面的&
为MarshalPKIXPublicKey
Priv := rsa.GenerateKey(rand.Reader, 4096)
PubASN1, err := x509.MarshalPKIXPublicKey(&Priv.PublicKey)
if err != nil {
// do something about it
}
pubBytes = pem.EncodeToMemory(&pem.Block{
Type: "RSA PUBLIC KEY",
Bytes: PubASN1,
})
ioutil.WriteFile("key.pub", PubBytes, 0644)
相关读物:
PS:MarshalPKIXPublicKey也接受ECDSA密钥,适当调整pem头。
答案 2 :(得分:23)
此处的代码段显示了公钥和私钥的导入和导出。它基于其他非常有用的答案,以及来自官方文档的复制意大利面。
package main
import (
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
"fmt"
)
func GenerateRsaKeyPair() (*rsa.PrivateKey, *rsa.PublicKey) {
privkey, _ := rsa.GenerateKey(rand.Reader, 4096)
return privkey, &privkey.PublicKey
}
func ExportRsaPrivateKeyAsPemStr(privkey *rsa.PrivateKey) string {
privkey_bytes := x509.MarshalPKCS1PrivateKey(privkey)
privkey_pem := pem.EncodeToMemory(
&pem.Block{
Type: "RSA PRIVATE KEY",
Bytes: privkey_bytes,
},
)
return string(privkey_pem)
}
func ParseRsaPrivateKeyFromPemStr(privPEM string) (*rsa.PrivateKey, error) {
block, _ := pem.Decode([]byte(privPEM))
if block == nil {
return nil, errors.New("failed to parse PEM block containing the key")
}
priv, err := x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
return nil, err
}
return priv, nil
}
func ExportRsaPublicKeyAsPemStr(pubkey *rsa.PublicKey) (string, error) {
pubkey_bytes, err := x509.MarshalPKIXPublicKey(pubkey)
if err != nil {
return "", err
}
pubkey_pem := pem.EncodeToMemory(
&pem.Block{
Type: "RSA PUBLIC KEY",
Bytes: pubkey_bytes,
},
)
return string(pubkey_pem), nil
}
func ParseRsaPublicKeyFromPemStr(pubPEM string) (*rsa.PublicKey, error) {
block, _ := pem.Decode([]byte(pubPEM))
if block == nil {
return nil, errors.New("failed to parse PEM block containing the key")
}
pub, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
return nil, err
}
switch pub := pub.(type) {
case *rsa.PublicKey:
return pub, nil
default:
break // fall through
}
return nil, errors.New("Key type is not RSA")
}
func main() {
// Create the keys
priv, pub := GenerateRsaKeyPair()
// Export the keys to pem string
priv_pem := ExportRsaPrivateKeyAsPemStr(priv)
pub_pem, _ := ExportRsaPublicKeyAsPemStr(pub)
// Import the keys from pem string
priv_parsed, _ := ParseRsaPrivateKeyFromPemStr(priv_pem)
pub_parsed, _ := ParseRsaPublicKeyFromPemStr(pub_pem)
// Export the newly imported keys
priv_parsed_pem := ExportRsaPrivateKeyAsPemStr(priv_parsed)
pub_parsed_pem, _ := ExportRsaPublicKeyAsPemStr(pub_parsed)
fmt.Println(priv_parsed_pem)
fmt.Println(pub_parsed_pem)
// Check that the exported/imported keys match the original keys
if priv_pem != priv_parsed_pem || pub_pem != pub_parsed_pem {
fmt.Println("Failure: Export and Import did not result in same Keys")
} else {
fmt.Println("Success")
}
}
答案 3 :(得分:0)
仅供参考:我整理了@David W的答案,并将其放在一个很小的Go Module中。 https://github.com/rokk4/gorsapemhelpers