英文:
the function x509.ParsePKCS8PrivateKey return rsa.privateKey. But can't use in the encryptPKCS1v15 function
问题
const strPrivateKey = "30820b82020100300d06092a864886f70d010101050004820b6c30820b680201000282028100acfc585f43ca36ec2dddc518b5c7d1303b658faec58b634aff16ce4b7930b93a23517f8d9c8a260f4e2eb44b01da5b6588fefe63acb68c15677"
decoded, err := hex.DecodeString(strPrivateKey)
if err != nil {
return ""
}
privateKey, err := x509.ParsePKCS8PrivateKey(decoded)
if err != nil {
return ""
}
encypt, err := rsa.EncryptPKCS1v15(rand.Reader, &privateKey.PublicKey, data)
if err != nil {
fmt.Println(err)
return ""
}
privateKey.PublicKey未定义（类型any没有PublicKey字段或方法）
英文:
const strPrivateKey = "30820b82020100300d06092a864886f70d010101050004820b6c30820b680201000282028100acfc585f43ca36ec2dddc518b5c7d1303b658faec58b634aff16ce4b7930b93a23517f8d9c8a260f4e2eb44b01da5b6588fefe63acb68c15677"
decoded, err := hex.DecodeString(strPrivateKey)
if err != nil {
return ""
}
privateKey, err := x509.ParsePKCS8PrivateKey(decoded)
if err != nil {
return ""
}
encypt, err := rsa.EncryptPKCS1v15(rand.Reader, &privateKey.PublicKey, data)
if err != nil {
fmt.Println(err)
return ""
}
privateKey.PublicKey undefined (type any has no field or method PublicKey)
答案1
得分: 1
根据文档（https://pkg.go.dev/crypto/x509@go1.19.3#ParsePKCS8PrivateKey）：
func ParsePKCS8PrivateKey(der []byte) (key any, err error)
...
它返回一个*rsa.PrivateKey、一个*ecdsa.PrivateKey或一个ed25519.PrivateKey。将来可能支持更多类型。
你应该使用type assertion来检查密钥的类型：
switch privateKey := privateKey.(type) {
case *rsa.PrivateKey:
// ...
case *ecdsa.PrivateKey:
// ...
case ed25519.PrivateKey:
// ...
default:
panic("unknown key")
}
由于rsa.EncryptPKCS1v15期望一个*rsa.PublicKey，你的代码可以这样写：
if privateKey, ok := privateKey.(*rsa.PrivateKey); ok {
encypt, err := rsa.EncryptPKCS1v15(rand.Reader, &privateKey.PublicKey, data)
}
顺便说一下，提供的strPrivateKey是无效的（encoding/hex: odd length hex string）。你可以从https://github.com/golang/go/blob/1c05968c9a5d6432fc6f30196528f8f37287dd3d/src/crypto/x509/pkcs8_test.go#L52-L124获取一些有效的私钥。
英文:
According to the doc (https://pkg.go.dev/crypto/x509@go1.19.3#ParsePKCS8PrivateKey):
> func ParsePKCS8PrivateKey(der []byte) (key any, err error)
>
> ...
> It returns a *rsa.PrivateKey, a *ecdsa.PrivateKey, or a ed25519.PrivateKey. More types might be supported in the future.
You should use type assertion to check the type of the key:
switch privateKey := privateKey.(type) {
case *rsa.PrivateKey:
// ...
case *ecdsa.PrivateKey:
// ...
case ed25519.PrivateKey:
// ...
default:
panic("unknown key")
}
Since rsa.EncryptPKCS1v15 expects a *rsa.PublicKey, your code can be written like this:
if privateKey, ok := privateKey.(*rsa.PrivateKey); ok {
encypt, err := rsa.EncryptPKCS1v15(rand.Reader, &privateKey.PublicKey, data)
}
BTW, the provided strPrivateKey is invalid (encoding/hex: odd length hex string). You can get some valid private keys from https://github.com/golang/go/blob/1c05968c9a5d6432fc6f30196528f8f37287dd3d/src/crypto/x509/pkcs8_test.go#L52-L124
答案2
得分: 0
*正确答案。我解析了privateKey.(rsa.PrivateKey)
decodedString, err := hex.DecodeString(utility.StrPrivateKey)
if err != nil {
return err
}
pkcs8PrivateKey, err := x509.ParsePKCS8PrivateKey(decodedString)
if err != nil {
return err
}
privateKey := pkcs8PrivateKey.(*rsa.PrivateKey)
英文:
*correct answer. I resolved privateKey.(rsa.PrivateKey)
decodedString, err := hex.DecodeString(utility.StrPrivateKey)
if err != nil {
return err
}
pkcs8PrivateKey, err := x509.ParsePKCS8PrivateKey(decodedString)
if err != nil {
return err
}
privateKey := pkcs8PrivateKey.(*rsa.PrivateKey)
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