Question

我必须在SOAP响应中使用xml签名。我用Java得到它，但我必须用.Net来做，但我无法解决它。这里执行工作的Java代码：

public class SigVal {
  private PublicKey publicKey;

  public XMLSignatureValidator(PublicKey publicKey) {
    this.publicKey = publicKey;
}
    public boolean isValid(Node dsSignature)
    {
        DOMValidateContext context = new DOMValidateContext(publicKey, dsSignature);
        String providerName = System.getProperty "jsr105Provider", "org.jcp.xml.dsig.internal.dom.XMLDSigRI");

        XMLSignatureFactory factory = XMLSignatureFactory.getInstance("DOM", (Provider) Class
                 .forName(providerName).newInstance());
              XMLSignature signature = factory.unmarshalXMLSignature(context);
              boolean coreValidity = signature.validate(context);
    }
}

公钥来自wsse：BinarySecurityToken的X509Certificate生成。 dsSignature节点是ds：Signature Element。

这就是SOAP响应：

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing">
    <SOAP-ENV:Header>
        <wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" SOAP-ENV:mustUnderstand="1">
            <wsse:BinarySecurityToken xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" EncodingType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary" ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3" wsu:Id="CertId-33637684">MII..==</wsse:BinarySecurityToken>
            <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
                <ds:SignedInfo>
                    <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" />
                    <ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />
                    <ds:Reference URI="#id-23582192">
                        <ds:Transforms>
                            <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" />
                        </ds:Transforms>
                        <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />
                        <ds:DigestValue>VvfpzVGZkr/AQ3krGcdklXujj3w=</ds:DigestValue>
                    </ds:Reference>
                    <ds:Reference URI="#id-961374">
                        <ds:Transforms>
                            <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" />
                        </ds:Transforms>
                        <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />
                        <ds:DigestValue>KGBEkW1e0fkV3ooAptSIldv9ftQ=</ds:DigestValue>
                    </ds:Reference>
                </ds:SignedInfo>
                <ds:SignatureValue>
StF...=
                </ds:SignatureValue>
                <ds:KeyInfo Id="KeyId-12282214">
                    <wsse:SecurityTokenReference xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="STRId-314846">
                        <wsse:Reference URI="#CertId-33637684" ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3" />
                    </wsse:SecurityTokenReference>
                </ds:KeyInfo>
            </ds:Signature>
            <wsu:Timestamp xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="id-23582192">
                <wsu:Created>2013-06-06T07:08:19.323Z</wsu:Created>
                <wsu:Expires>2013-06-06T07:13:19.323Z</wsu:Expires>
            </wsu:Timestamp>
        </wsse:Security>
        <wsa:MessageID SOAP-ENV:mustUnderstand="0">uuid:dddca070-ce77-11e2-b9ac-d6977a2ed2bf</wsa:MessageID>
        <wsa:To SOAP-ENV:mustUnderstand="0">http://schemas.xmlsoap.org/ws/2004/08/addressing/role/anonymous</wsa:To>
        <wsa:Action SOAP-ENV:mustUnderstand="0">...</wsa:Action>
        <From xmlns="http://schemas.xmlsoap.org/ws/2004/08/addressing" SOAP-ENV:mustUnderstand="0">
            <Address>...</Address>
        </From>
        <wsa:RelatesTo RelationshipType="wsa:Reply" SOAP-ENV:mustUnderstand="0">urn:uuid:3f4f070b-9e28-410d-b10b-a21a7d62ee86</wsa:RelatesTo>
    </SOAP-ENV:Header>
    <SOAP-ENV:Body xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="id-961374">
        ...
    </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

好的，我试过C＃

            XmlNodeList xmlNodeList = xmlDocument.GetElementsByTagName("wsse:BinarySecurityToken");
            string binarySecurityToken = xmlNodeList[0].InnerText;
            X509Certificate2 x509Certificate2 = new X509Certificate2(Convert.FromBase64String(binarySecurityToken));

            xmlNodeList = xmlDocument.GetElementsByTagName("Signature", "http://www.w3.org/2000/09/xmldsig#");
            XmlElement signature = (XmlElement) xmlNodeList[0];
            SignedXml signedXml = new SignedXml(xmlDocument);
            signedXml.LoadXml(signature);

            signedXml.SignedInfo.CanonicalizationMethod = SignedXml.XmlDsigExcC14NTransformUrl;

bool isOk = signedXml.CheckSignature();

但CheckSignature总是返回False。我重写了SignedXml.GetIdElement以获取参考元素。但那不能胜任。

我理解正确：我必须从Soap消息（ds：Signature）中获取签名元素，从Soap消息中获取证书（wsse：BinarySecurityToken）并验证它们。

Answer 1

在处理Java Web服务时，这对我有用：

XmlDocument xmlDocument = new XmlDocument();
xmlDocument.PreserveWhitespace = true;
xmlDocument.LoadXml(xmlResponse);

XmlNodeList xmlNodeList = xmlDocument.GetElementsByTagName("wsse:BinarySecurityToken");
string binarySecurityToken = xmlNodeList[0].InnerText;
X509Certificate2 x509Certificate2 = new X509Certificate2(Convert.FromBase64String(binarySecurityToken));

xmlNodeList = xmlDocument.GetElementsByTagName("Signature", "http://www.w3.org/2000/09/xmldsig#");
XmlElement signature = (XmlElement)xmlNodeList[0];
SignedXmlWithId signedXml = new SignedXmlWithId(xmlDocument);
signedXml.LoadXml(signature);

bool isOk = signedXml.CheckSignature(x509Certificate2, true);

首先，在将xml加载到PreserveWhitespace对象之前，您需要将true设置为XmlDocument。

如果signed元素的id具有名称空间前缀（在此示例中类似于wsu:Id），SignedXml将失败，因此替代方法是将其子类化并覆盖GetIdElement方法。 / p>

SignedXmlWithId课程来自this answer。

public class SignedXmlWithId : SignedXml
{
    public SignedXmlWithId(XmlDocument xml) : base(xml)
    {
    }

    public SignedXmlWithId(XmlElement xmlElement) 
        : base(xmlElement)
    {       
    }

    public override XmlElement GetIdElement(XmlDocument doc, string id)
    {
        // check to see if it's a standard ID reference
        XmlElement idElem = base.GetIdElement(doc, id);

        if (idElem == null)
        {
            XmlNamespaceManager nsManager = new XmlNamespaceManager(doc.NameTable);
            nsManager.AddNamespace("wsu", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd");

            idElem = doc.SelectSingleNode("//*[@wsu:Id=\"" + id + "\"]", nsManager) as XmlElement;
        }

        return idElem;
    }
}

最后，您需要将证书传递给CheckSignature方法。

此外，您不需要设置签名的CanonicalizationMethod或其他参数 - 所有内容都已经用XML编写。

有些人因为.NET 3.5和.NET 4.0之间的规范化实现的变化而遇到问题（请参阅here获取解决方案），但我没有遇到此问题。

另外，在检查签名之前，请注意不要对响应XML进行任何格式化。（起初，我使用编辑器将响应保存到XML文件中，并在测试时使用了该XML。这没有用，但是当我直接从Web服务测试响应时，它起作用了。）

使用.net验证SOAP信封中的xml签名

1 个答案: