C# 如何使用X509证书对xml进行签名,向xml模板添加摘要值和签名

C# 如何使用X509证书对xml进行签名,向xml模板添加摘要值和签名,c#,xml,x509,sign,digest,C#,Xml,X509,Sign,Digest,我是C#的新手,尤其是刚刚与X509签约。我有一个xml模板,我必须在其中添加使用的证书(完成),并签署时间戳(TS-1)、二进制安全令牌和主体(id-1)。 此外,我需要用这3个元素的摘要值编写(例如替换占位符),并添加签名值 然而,我并不真正理解这一概念,例如如何做到这一点。我读了一些网站,例如。 但我无法使代码适应我的问题 以下是我尝试过的: public static string SignXml(string template) { XmlDocument document

我是C#的新手,尤其是刚刚与X509签约。我有一个xml模板,我必须在其中添加使用的证书(完成),并签署时间戳(TS-1)、二进制安全令牌和主体(id-1)。 此外,我需要用这3个元素的摘要值编写(例如替换占位符),并添加签名值

然而,我并不真正理解这一概念,例如如何做到这一点。我读了一些网站,例如。 但我无法使代码适应我的问题

以下是我尝试过的:

public static string SignXml(string template)
{

    XmlDocument document = new XmlDocument();
    document.LoadXml(template);

        // define elements that will be signed
        XmlNode securityToken = null;
        XmlNode validityPeriod = null;
        XmlNode body = null;
        XmlNode signedInfo = null;
        XmlNode signatureValue = null;
        XmlNodeList digestTags = null;



        XmlNamespaceManager namespaces = new XmlNamespaceManager(document.NameTable);
        namespaces.AddNamespace("ns", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd");
        namespaces.AddNamespace("nu", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd");
        namespaces.AddNamespace("bo", "http://schemas.xmlsoap.org/soap/envelope/");
        namespaces.AddNamespace("si", "http://www.w3.org/2000/09/xmldsig#");
        namespaces.AddNamespace("sinfo", "soapenv xd xe");

        document.LoadXml(template);
        //XmlNode idNode = document.SelectSingleNode("/My_RootNode/ns:id", namespaces);

        securityToken = document.SelectSingleNode("descendant::ns:BinarySecurityToken", namespaces);
        validityPeriod = document.SelectSingleNode("descendant::nu:Timestamp", namespaces);
        body = document.SelectSingleNode("descendant::bo:Body", namespaces);
        signedInfo = document.SelectSingleNode("descendant::si:SignedInfo", namespaces);
        signatureValue = document.SelectSingleNode("descendant::si::sinfo:SignatureValue", namespaces);
        digestTags = document.SelectNodes("descendant::si:DigestValue", namespaces);

        // add the digests (to know where to write the digests)
        String nodeName = null;
        for (int counter = 0; counter < digestTags.Count; counter++)
        {
            nodeName = digestTags[counter].FirstChild.InnerText;
            if (WebserviceConstants.PLACEHOLDER_AUTHNREQUEST_DIGEST.Equals(nodeName))
            {

                generateDigest(body, digestTags[counter]);
            }
            else if (WebserviceConstants.PLACEHOLDER_CERTIFICATE_DIGEST.Equals(nodeName))
            {

                generateDigest(securityToken, digestTags[counter]);
            }
            else if (WebserviceConstants.PLACEHOLDER_TIMESTAMP_TAG_DIGEST.Equals(nodeName))
            {

                generateDigest(validityPeriod, digestTags[counter]);
            }
        }



        SignedXml signedXml = new SignedXml(document);



    X509Certificate2 cert = new X509Certificate2();
    cert = getbase();

    signedXml.SigningKey = cert.PrivateKey;

    // Create a reference to be signed.
    Reference reference = new Reference();
    reference.Uri = "#TS-1";

    // Add an enveloped transformation to the reference.            
    XmlDsigEnvelopedSignatureTransform env =
       new XmlDsigEnvelopedSignatureTransform(true);
    reference.AddTransform(env);

    //canonicalize
    XmlDsigC14NTransform c14t = new XmlDsigC14NTransform();
    reference.AddTransform(c14t);

    KeyInfo keyInfo = new KeyInfo();
    KeyInfoX509Data keyInfoData = new KeyInfoX509Data(cert);
    KeyInfoName kin = new KeyInfoName();
    kin.Value = "Public key of certificate";
    RSACryptoServiceProvider rsaprovider = (RSACryptoServiceProvider)cert.PublicKey.Key;
    RSAKeyValue rkv = new RSAKeyValue(rsaprovider);
    keyInfo.AddClause(kin);
    keyInfo.AddClause(rkv);
    keyInfo.AddClause(keyInfoData);
    signedXml.KeyInfo = keyInfo;

    // Add the reference to the SignedXml object.
    signedXml.AddReference(reference);

    // Compute the signature.
    signedXml.ComputeSignature();

    // Get the XML representation of the signature and save 
    // it to an XmlElement object.
    XmlElement xmlDigitalSignature = signedXml.GetXml();

    document.DocumentElement.AppendChild(
    document.ImportNode(xmlDigitalSignature, true));
    document.DocumentElement.AppendChild(document.ImportNode(xmlDigitalSignature, true));

        return document.OuterXml;
    }
}
publicstaticstringsignxml(字符串模板)
{
XmlDocument document=新的XmlDocument();
document.LoadXml(模板);
//定义将被签名的元素
XmlNode securityToken=null;
XmlNode validityPeriod=null;
xmlnodebody=null;
XmlNode signedInfo=null;
XmlNode signatureValue=null;
XmlNodeList digestTags=null;
XmlNamespaceManager名称空间=新的XmlNamespaceManager(document.NameTable);
namespaces.AddNamespace(“ns”http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd");
namespaces.AddNamespace(“nu”http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd");
namespaces.AddNamespace(“bo”http://schemas.xmlsoap.org/soap/envelope/");
namespaces.AddNamespace(“si”http://www.w3.org/2000/09/xmldsig#");
addNamespaces(“sinfo”、“soapenv xd xe”);
document.LoadXml(模板);
//XmlNode idNode=document.SelectSingleNode(“/My\u RootNode/ns:id”,名称空间);
securityToken=document.SelectSingleNode(“后代::ns:BinarySecurityToken”,名称空间);
validityPeriod=document.SelectSingleNode(“后代::nu:Timestamp”,名称空间);
body=document.SelectSingleNode(“后代::bo:body”,名称空间);
signedInfo=document.SelectSingleNode(“后代::si:signedInfo”,名称空间);
signatureValue=document.SelectSingleNode(“后代::si::sinfo:signatureValue”,名称空间);
digestTags=document.SelectNodes(“后代::si:DigestValue”,名称空间);
//添加摘要(知道在哪里写摘要)
字符串nodeName=null;
对于(int counter=0;counter
我在问自己:

  • 如何获取摘要值以及如何将其写入相应的xml节点
  • 如何计算签名值,因为它“包含”所有3个引用的签名信息
正如你所看到的,我缺少一些一般的背景和理解。如果你能帮我,那就太酷了


谢谢

您不必手动创建签名的节点,在计算签名后,您可以调用GetXml方法(您已经在这样做了:signedXml.GetXml()),这将返回如下内容:

<Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
  <SignedInfo>
    <CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" />
    <SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />
    <Reference URI="">
        <Transforms>
            <Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" />
            <Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" />
        </Transforms>
        <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />
        <DigestValue>zRSPtja5EtX7hVbyJ11EjoYTRDk=</DigestValue>
    </Reference>
  </SignedInfo>
  <SignatureValue>Ua1/WP28WzfXaxUj....</SignatureValue>
  <KeyInfo>        
    <X509Data>
        <X509Certificate>MIIF3jCCBUegAwIBAgIEPQa1....</X509Certificate>
    </X509Data>
  </KeyInfo>
</Signature>
XmlElement e = this.SignedInfo.GetXml(); //get the signedinfo nodes
document.AppendChild(document.ImportNode(e, true));
Transform canonicalizationMethodObject=this.SignedInfo.CanonicalizationMethodObject;
canonicalizationMethodObject.LoadInput(document);
canonicalizationMethodObject.GetDigestedOutput(hash); //digest the signedinfo node