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我正在尝试从标签下的 xml 文件中获取 x509 证书的到期日期

<ds:X509Certificate> MBaAFI7JTi5oRslwv2B3MmERGbPKKUsSMFwGA1UdIARVMFMwUQYKKwYBBAEJFQEBADBDMEEGCCsG
AQUFBwIBFjVodHRwOi8vd3d3LmNpc2NvLmNvbS9zZWN1cml0eS9wa2kvcG9saWNpZXMvaW5kZXgu
aHRtbDATBgNVHSUEDDAKBggrBgEFBQcDATANBgkqhkiG9w0BAQUFAAOCAQEAs2DJZwgVLmZqQS2N
3Yp4iGYhZBG6vZSDaiaAg6u1wgrfq/byBd7H3Ei+V9I7MZ1aCh4s3kl6FJ1CoRhMQcM1gbxpCbPP
KAfrMv/5/MH8erMnole7m/MqVHETX1UbLEyagOioqK3cs8MzMKxC+Fdku6Bm+i/6xhUsc6XbrVJl
IHsVBB9+9ZnpjAjC9jj21r04N51cyfp6C37999TaybNEtCJlG0XTHfLbcyX65E9ndVaRd6GYu/d0
xW0MT5bKhA36KhpUROAbPS7rXKKkfCYnMkmImE7Hfvm3vRSahX+ehY1Tx9qJXFv3PYGzbyDbvpjV
2cSUgP/bhGATKSOZuhohrw==  </ds:X509Certificate

>

我有将其读取为字符串的代码

NodeList nodelist = element.getElementsByTagName("ds:X509Certificate");
Element element1 = (Element) nodelist.item(0);
NodeList certificateItem = element1.getChildNodes();
String certificateValue = "---- BEGIN CERTIFICATE -------- " + "\n" +
"certificateItem.item(0).getNodeValue()" + "\n" + "--- END CERTIFICATE";                            
System.out.print("Certificate data is : " + certificateValue);
InputStream certinputstream = new ByteArrayInputStream(certificateValue.getBytes());
CertificateFactory cf = CertificateFactory.getInstance("X.509");
X509Certificate cert = (X509Certificate)cf.generateCertificate(certinputstream);
System.out.println("Expiry Date : " + cert.getNotAfter());

但是我收到以下错误 java.security.cert.CertificateParsingException: invalid DER-encoded certificate data at sun.security.x509.X509CertImpl.parse(Unknown Source) at sun.security.x509.X509CertImpl.(Unknown Source) 任何想法? 谢谢

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1 回答 1

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目前尚不清楚这是否都是错误的，但您没有使用文档中指定的精确格式：CertificateFactory

如果证书以 Base64 编码提供，则必须以 -----BEGIN CERTIFICATE----- 开头，结尾必须以 -----END CERTIFICATE----- 为界.

文本周围有空格，破折号数量错误，并且 . 之后没有破折号END CERTIFICATE。

您可能还想修剪节点值，因为它当前在数据后面有几个空格。

于 2012-07-18T17:03:24.280 回答