Re: [dev-crypto-csharp] Problems reading the private key

[David Hook]

You might have to describe what you are seeing as a "difference".

Regards,

David

On 16/7/22 08:04, felix.quin...@yahoo.com wrote:

I'm having trouble reading the private key generated by openssl and bouncy 
castle. They are different and I don't know why.

The key generated with openssl ,'openssl req -x509 -newkey rsa:2048 -keyout 
autosign.key -out autosign.cer -days 365 -nodes' I have to read it with 
RsaPrivateCrtKeyParameters and the one generated with bouncy castle with 
AsymmetricCipherKeyPair and I can't find the difference between them.

I'm also not sure that the way to convert a certificate and key to a p12 file 
is correct.

using (StreamReader streamReader = File.OpenText(archivoKey))
{       
        Org.BouncyCastle.OpenSsl.PemReader pemReader;
        pemReader = new Org.BouncyCastle.OpenSsl.PemReader(streamReader, new 
PasswordFinder(clave));
        
        /*AsymmetricCipherKeyPair keyPair;
        keyPair = (AsymmetricCipherKeyPair)pemReader.ReadObject();*/
        RsaPrivateCrtKeyParameters keyPair;
        keyPair = (RsaPrivateCrtKeyParameters)pemReader.ReadObject();           
                        
        streamReader.Close();
        
        X509CertificateEntry[] chain = new X509CertificateEntry[1];

        X509CertificateParser x509CertificateParser = new 
X509CertificateParser();
        X509Certificate cert = 
x509CertificateParser.ReadCertificate(File.ReadAllBytes(archivoCsr));
        
        IDictionary bagAttr = new Hashtable();
        bagAttr.Add(PkcsObjectIdentifiers.Pkcs9AtFriendlyName.Id,
                new DerBmpString(noExtension));
        /*bagAttr.Add(PkcsObjectIdentifiers.Pkcs9AtLocalKeyID.Id,
                new SubjectKeyIdentifierStructure(pubKey));*/
        
        chain[0] = new X509CertificateEntry(cert, bagAttr);

        bagAttr = new Hashtable();
        
        Pkcs12Store store = new Pkcs12StoreBuilder().Build();
        
        store.SetKeyEntry(noExtension, new AsymmetricKeyEntry(keyPair, 
bagAttr), chain);
        
        FileStream fOut = File.Create(archivep12));
        store.Save(fOut, clave.ToCharArray(), new SecureRandom());
        fOut.Close();
}