Я пытаюсь преобразовать / создать сертификат PKCS7 "p7b" из подписанной цепочки сертификатов pem +, используя класс шифрования BouncyCastle или .net
Я пытался использовать только BC без успеха, поэтому я использую только BCпрочитать сертификаты pem и затем преобразовать их в объект X509Certificate2.В конце я ищу строку pem в конце, начинающуюся с "----- BEGIN PKCS7 -----", чтобы сохранить ее как файл p7b, что я сделал ..
public void DownloadP7bFile(string certId)
{
var records = (DataView)myCertDataSource.Select(DataSourceSelectArguments.Empty);
var selected = Guid.Parse(certId);
foreach (DataRow row in records.Table.Rows)
{
if (!Guid.Parse(row.Field<Guid>("cert_id").ToString()).Equals(selected)) continue;
var filename = row.Field<string>("cert_fqdn_main");
var certContent2 = row.Field<string>("certHash_certificate");
var certissuer = row.Field<string>("certHash_issuer");
DataTable chaincerts = GetChainCertsFromDB(certissuer);
//### get pem string from DB to BC cert objects
Org.BouncyCastle.X509.X509Certificate serverCert = CreateCertObjFromPem(certContent2);
Org.BouncyCastle.X509.X509Certificate interCert = CreateCertObjFromPem(chaincerts.Rows[0].Field<string>("cacert_pemhash"));
Org.BouncyCastle.X509.X509Certificate rootCert = CreateCertObjFromPem(chaincerts.Rows[1].Field<string>("cacert_pemhash"));
//### transform to X509Certificate2 object
System.Security.Cryptography.X509Certificates.X509Certificate2 serverCert2 = new System.Security.Cryptography.X509Certificates.X509Certificate2();
System.Security.Cryptography.X509Certificates.X509Certificate2 interCert2 = new System.Security.Cryptography.X509Certificates.X509Certificate2();
System.Security.Cryptography.X509Certificates.X509Certificate2 rootCert2 = new System.Security.Cryptography.X509Certificates.X509Certificate2();
serverCert2.Import(serverCert.GetEncoded());
interCert2.Import(interCert.GetEncoded());
rootCert2.Import(rootCert.GetEncoded());
//### collect all needed certificates
var collection = new System.Security.Cryptography.X509Certificates.X509Certificate2Collection();
collection.Add(rootCert2);
collection.Add(interCert2);
collection.Add(serverCert2);
var pkcs7ContentBytes = collection.Export(System.Security.Cryptography.X509Certificates.X509ContentType.Pkcs7);
//### Test if pkcs7 can be read ###
System.Security.Cryptography.Pkcs.SignedCms sigcms = new System.Security.Cryptography.Pkcs.SignedCms();
sigcms.Decode(pkcs7ContentBytes);
if (sigcms.Certificates.Count > 0)
{
Console.WriteLine("Aussteller: {0}", sigcms.Certificates[0].IssuerName.Name);
Console.WriteLine("Gültig bis {0}", sigcms.Certificates[0].NotAfter);
}
var sigvar2 = sigcms.Encode();
var pkcs7Content = Convert.ToBase64String(pkcs7ContentBytes); //das gute
var certEncodedBytes = Convert.FromBase64String(pkcs7Content);
var certContent = Encoding.UTF8.GetString(certEncodedBytes);
var certContent7 = UTF8Encoding.UTF8.GetString(certEncodedBytes);
var CertContent8 = Convert.ToBase64String(sigvar2);
var CertContent8Bytes = Convert.FromBase64String(CertContent8);
var certfromsig = sigcms.Certificates.Export(System.Security.Cryptography.X509Certificates.X509ContentType.Pkcs7);
//var pkcs7cert = new System.Security.Cryptography.X509Certificates.X509Certificate2(certEncodedBytes);
//var pkcs7cert2 = new System.Security.Cryptography.X509Certificates.X509Certificate2(sigvar2);
//System.Security.Cryptography.Pkcs.EnvelopedCms pkcs7Envelop = new System.Security.Cryptography.Pkcs.EnvelopedCms();
//File.WriteAllBytes(@"")
//string utfString = Encoding.UTF8.GetString(pkcs7ContentBytes, 0, pkcs7ContentBytes.Length);
var memoryStream = new MemoryStream(certEncodedBytes);
//var cryptostream = new System.Security.Cryptography.CryptoStream(memoryStream);
//memoryStream.Write(pkcs7ContentBytes, 0, pkcs7ContentBytes.Length);
var test31 = memoryStream.ToArray();
var test32 = memoryStream.Read(certEncodedBytes, 0, certEncodedBytes.Length);
memoryStream.Flush();
memoryStream.Close();
//var test30 = DecoderConverter.ConvertX509ToPkcs7(rootCert, interCert, serverCert);
PerformFileDownload(filename, "p7b", pkcs7Content);
break;
}
}