问题描述

我正在尝试将没有私钥的证书导出为 BASE-64 编码文件，与从 Windows 中导出它相同.从 Windows 导出时，我可以在记事本中打开 .cer 文件.

I am trying to export a cert without the private key as as BASE-64 encoded file, same as exporting it from windows. When exported from windows I am able to open the .cer file in notepad.

当我尝试以下操作并在记事本上打开时，我得到二进制数据...我认为它...不可读.

When I try the following and open on notepad I get binary data...I think it is...not readable.

X509Certificate2 cert = new X509Certificate2("c:\myCert.pfx", "test", X509KeyStorageFlags.Exportable);

File.WriteAllBytes("c:\testcer.cer", cert.Export(X509ContentType.Cert));

我尝试删除X509KeyStorageFlags.Exportable"，但这不起作用.我错过了什么吗?

I tried removing the 'X509KeyStorageFlags.Exportable" but that doesn't work. Am I missing something?

编辑 - 我试过了

File.WriteAllText("c:\testcer.cer",Convert.ToBase64String(cert.Export(X509ContentType.Cert)))

这似乎可行，但是，缺少-----BEGIN CERTIFICATE-----"和-----END CERTIFICATE-----"

and that seems to work, however, missing the "-----BEGIN CERTIFICATE-----" and "-----END CERTIFICATE-----"

推荐答案

也许

/// <summary>
/// Export a certificate to a PEM format string
/// </summary>
/// <param name="cert">The certificate to export</param>
/// <returns>A PEM encoded string</returns>
public static string ExportToPEM(X509Certificate cert)
{
    StringBuilder builder = new StringBuilder();            

    builder.AppendLine("-----BEGIN CERTIFICATE-----");
    builder.AppendLine(Convert.ToBase64String(cert.Export(X509ContentType.Cert), Base64FormattingOptions.InsertLineBreaks));
    builder.AppendLine("-----END CERTIFICATE-----");

    return builder.ToString();
}

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