Hi All,
I have the following piece of code to generate a private key in PKCS8 form
and save it in a file. It does generate a file, but when I try to check
using the openssl command
openssl rsa -in rsapk.key -check
I get the following errors
140092967139232:error:0D0680A8:asn1 encoding routines:ASN1_CHECK_TLEN:wrong
tag:tasn_dec.c:1199:
140092967139232:error:0D06C03A:asn1 encoding
routines:ASN1_D2I_EX_PRIMITIVE:nested asn1 error:tasn_dec.c:767:
140092967139232:error:0D08303A:asn1 encoding
routines:ASN1_TEMPLATE_NOEXP_D2I:nested asn1 error:tasn_dec.c:699:Field=n,
Type=RSA
140092967139232:error:04093004:rsa routines:OLD_RSA_PRIV_DECODE:RSA
lib:rsa_ameth.c:121:
Anyone knows what is wrong with my method?
package main
import (
"crypto/x509"
"crypto/rsa"
"encoding/pem"
"io/ioutil"
"crypto/rand"
"encoding/asn1"
)
type privateKeyInfo struct {
Version int
PrivateKeyAlgorithm []asn1.ObjectIdentifier
PrivateKey []byte
}
func NewPKCS8PrivateKey() {
var pkey privateKeyInfo
var bKey []byte
oidPublicKeyRSA := asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 1}
key, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
return
}
pkey.Version = 0
pkey.PrivateKeyAlgorithm = make([]asn1.ObjectIdentifier, 1)
pkey.PrivateKeyAlgorithm[0] = oidPublicKeyRSA
pkey.PrivateKey = x509.MarshalPKCS1PrivateKey(key)
bKey , _ = asn1.Marshal(pkey)
block := pem.Block{Type: "RSA PRIVATE KEY", Bytes: bKey}
ioutil.WriteFile("./rsapk.key", pem.EncodeToMemory(&block), 0600)
}
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