xml签名DS前缀？ [英] xml signature DS prefix?

问题描述

是否可以使用RSA签名XML文件，并使用名称空间前缀 ds：Signature代替 Signature？我花了很多时间来解决这个问题，从中我看不出解决方案。

Is there a way to sign an XML file with RSA and to have the namespace prefix "ds:Signature" instead of "Signature"? I spent many hourstrying to solve this and from what I can see there is no solution.

似乎它在System.Security.Cryptography类中是硬编码的。 Xml.Signature。

It seems that it is hard-coded in the class System.Security.Cryptography.Xml.Signature.

XmlElement element = document.CreateElement("Signature", "http://www.w3.org/2000/09/xmldsig#");

如果有人知道解决方案，则需要对它签名，因为导入该软件的软件会使用 ds：signature，因此软件使用 ds作为前缀进行验证：

If anyone knows a solution, I need to sign it like that cause the software importing it verifies it with "ds:signature", so with "ds" prefix the software verifies it like this:

    public static bool VerifySignature(XmlDocument doc, RSA key, string prefix)
    {
        SignedXml xml = new SignedXml(doc);
        string str = "Signature";
        if (!string.IsNullOrEmpty(prefix))
        {
            str = string.Format("{0}:{1}", prefix, str);
        }
        XmlNodeList elementsByTagName = doc.GetElementsByTagName(str);
        xml.LoadXml((XmlElement)elementsByTagName[0]);
        return xml.CheckSignature(key);
    }

  VerifySignature(xmlDoc, rsa, "ds");

通常它是这样的：

<kk>blabla<Signature xmlns="http://www.w3.org/2000/09/xmldsig#"><SignedInfo><CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" /><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" /></Transforms><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" /><DigestValue>rVL2nKjPTBhL9IDHYpu69OiE8gI=</DigestValue></Reference></SignedInfo><SignatureValue>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</SignatureValue></Signature></kk>

我需要这样做：

<kk>blabla<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=""><ds:Transforms><ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" /></ds:Transforms><ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" /><ds:DigestValue>rVL2nKjPTBhL9IDHYpu69OiE8gI=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>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</ds:SignatureValue></ds:Signature></kk>

推荐答案

我找到了解决方案此处

using System;
using System.Reflection;
using System.Security.Cryptography.Xml;
using System.Security.Cryptography;
using System.Collections.Generic;
using System.Text;
using System.Xml;

namespace mysign
{
public class PrefixedSignedXML : SignedXml
{
    public PrefixedSignedXML(XmlDocument document)
        : base(document)
    { }

    public PrefixedSignedXML(XmlElement element)
        : base(element)
    { }

    public PrefixedSignedXML()
        : base()
    { }

    public void ComputeSignature(string prefix)
    {
        this.BuildDigestedReferences();
        AsymmetricAlgorithm signingKey = this.SigningKey;
        if (signingKey == null)
        {
            throw new CryptographicException("Cryptography_Xml_LoadKeyFailed");
        }
        if (this.SignedInfo.SignatureMethod == null)
        {
            if (!(signingKey is DSA))
            {
                if (!(signingKey is RSA))
                {
                    throw new CryptographicException("Cryptography_Xml_CreatedKeyFailed");
                }
                if (this.SignedInfo.SignatureMethod == null)
                {
                    this.SignedInfo.SignatureMethod = "http://www.w3.org/2000/09/xmldsig#rsa-sha1";
                }
            }
            else
            {
                this.SignedInfo.SignatureMethod = "http://www.w3.org/2000/09/xmldsig#dsa-sha1";
            }
        }
        SignatureDescription description = CryptoConfig.CreateFromName(this.SignedInfo.SignatureMethod) as SignatureDescription;
        if (description == null)
        {
            throw new CryptographicException("Cryptography_Xml_SignatureDescriptionNotCreated");
        }
        HashAlgorithm hash = description.CreateDigest();
        if (hash == null)
        {
            throw new CryptographicException("Cryptography_Xml_CreateHashAlgorithmFailed");
        }
        this.GetC14NDigest(hash, prefix);
        this.m_signature.SignatureValue = description.CreateFormatter(signingKey).CreateSignature(hash);
    }

    public XmlElement GetXml(string prefix)
    {
        XmlElement e = this.GetXml();
        SetPrefix(prefix, e);
        return e;
    }

    //Invocar por reflexión al método privado SignedXml.BuildDigestedReferences
    private void BuildDigestedReferences()
    {
        Type t = typeof(SignedXml);
        MethodInfo m = t.GetMethod("BuildDigestedReferences", BindingFlags.NonPublic | BindingFlags.Instance);
        m.Invoke(this, new object[] { });
    }

    private byte[] GetC14NDigest(HashAlgorithm hash, string prefix)
    {
        //string securityUrl = (this.m_containingDocument == null) ? null : this.m_containingDocument.BaseURI;
        //XmlResolver xmlResolver = new XmlSecureResolver(new XmlUrlResolver(), securityUrl);
        XmlDocument document = new XmlDocument();
        document.PreserveWhitespace = true;
        XmlElement e = this.SignedInfo.GetXml();
        document.AppendChild(document.ImportNode(e, true));
        //CanonicalXmlNodeList namespaces = (this.m_context == null) ? null : Utils.GetPropagatedAttributes(this.m_context);
        //Utils.AddNamespaces(document.DocumentElement, namespaces);

        Transform canonicalizationMethodObject = this.SignedInfo.CanonicalizationMethodObject;
        //canonicalizationMethodObject.Resolver = xmlResolver;
        //canonicalizationMethodObject.BaseURI = securityUrl;
        SetPrefix(prefix, document.DocumentElement); //establecemos el prefijo antes de se que calcule el hash (o de lo contrario la firma no será válida)
        canonicalizationMethodObject.LoadInput(document);
        return canonicalizationMethodObject.GetDigestedOutput(hash);
    }

    private void SetPrefix(string prefix, XmlNode node)
    {
        foreach (XmlNode n in node.ChildNodes)
            SetPrefix(prefix, n);
        node.Prefix = prefix;
    }
}
}

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