无法验证在 https://api.paypal.com 找到的证书

Question

开始在生产中为我们的PayPal webhook 接收这些异常：

PayPal.PayPalException: Unable to verify the certificate(s) found at https://api.paypal.com/v1/notifications/certs/CERT-360caa42-fca2a594-8079afec
at PayPal.CertificateManager.GetCertificatesFromUrl(String certUrl)
at PayPal.Api.WebhookEvent.ValidateReceivedEvent(APIContext apiContext, NameValueCollection requestHeaders, String requestBody, String webhookId)
PayPal/AUHR-214.0-51787073

我们所有的Nuget软件包都是最新的：

• PayPal (1.9.1)
• 布伦特里 (4.11.0)

我们的环境是：

• Windows Server 2012 R2 Datacenter(已安装所有更新)
• 在 Azure 上的负载均衡器后面

我似乎看不到我们最近所做的任何可能导致这种情况的更改。 有没有人知道我们如何解决这个问题？

编辑
下载证书，并运行以下代码：

var str = @"-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----";
string[] strArray = str.Split(new string[2]
{
"-----BEGIN CERTIFICATE-----",
"-----END CERTIFICATE-----"
}, StringSplitOptions.RemoveEmptyEntries);
foreach (string str2 in strArray)
{
Response.Write(str2 + "<hr>");
string s = str2.Trim();
if (!string.IsNullOrEmpty(s))
{
X509Certificate2 certificate = new X509Certificate2(Encoding.UTF8.GetBytes(s));
if (!certificate.Verify())
{
Response.Write("Unable to verify the certificate(s) found<hr>");

X509Chain chain = new X509Chain();
try
{
var chainBuilt = chain.Build(certificate);
Response.Write(string.Format("Chain building status: {0}", chainBuilt));
if (chainBuilt == false)
foreach (X509ChainStatus chainStatus in chain.ChainStatus)
Response.Write(string.Format("Chain error: {0} {1}", chainStatus.Status, chainStatus.StatusInformation));
}
catch (Exception ex)
{
Response.Write(ex.ToString());
}
}
}
}

返回错误：

Chain building status: FalseChain error: Revoked The certificate is revoked.

这就是引发异常的原因。 不知道如何解决。

Answer 1

解决方法可以在这里找到：
https://serverfault.com/questions/961681/revoked-ssl-certificate

PayPal的官方 .NET SDK 最新版本似乎在某处引用了已吊销的证书。 不好。