After a lot of research, I found this answer. Basically it s necessary modify the SignedXml class to add the prefix before getting the digest value of the SignedInfo node.

将修改计算符号方法以添加前缀参数

public void ComputeSignature(string prefix){...}

当该方法被称为它时,它通过消化签名Info节点的值来计算签名值,如果您在不使用“ds”前缀的情况下获得该值,然后添加前缀,您将获得无效的签名,所以您必须在获得签名的信息节点的摘要值之前添加前缀。

GetC14NDigest 方法生成了此摘要值, 因此此方法将会被修改, 添加前缀参数, 并在获取摘要值前添加前缀

private byte[] GetC14NDigest(HashAlgorithm hash, string prefix)
{
    XmlDocument document = new XmlDocument();
    document.PreserveWhitespace = false;
    XmlElement e = this.SignedInfo.GetXml(); //get the signedinfo nodes
    document.AppendChild(document.ImportNode(e, true));        
    Transform canonicalizationMethodObject = this.SignedInfo.CanonicalizationMethodObject;       
    SetPrefix(prefix, document.DocumentElement); /*Set the prefix before getting the HASH*/
    canonicalizationMethodObject.LoadInput(document);
    return canonicalizationMethodObject.GetDigestedOutput(hash);
}

Ok, so now you have the Signature Value of the SignedInfo nodes WITH the "ds" prefix, that being said you still DON T have the xml with the prefix yet, so if you just call the GetXml method you will not see the "ds" prefix and of course because the signature value was calculated considering the ds prefix you will have an invalid signature. To avoid that and get the xml structure with the prefix you have to modify the GetXml method, add the prefix parameter, and call the SetPrefix method wich will add the "ds" prefix to all the nodes in the Signature Xml

public XmlElement GetXml(string prefix)
{
    XmlElement e = this.GetXml();
    SetPrefix(prefix, e); //return the xml structure with the prefix
    return e;
}

换了这些修改,我就离开这班班班

< 坚固 > CUSTOM CLASS < /坚固 >

internal sealed class CustomSignedXml : SignedXml
{
    XmlElement obj = null;
    public CustomSignedXml (XmlDocument xml)
        : base(xml)
    {
    }

    public CustomSignedXml (XmlElement xmlElement)
        : base(xmlElement)
    {

    }

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

    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);
    }         

    private byte[] GetC14NDigest(HashAlgorithm hash, string prefix)
    {

        XmlDocument document = new XmlDocument();
        document.PreserveWhitespace = false;
        XmlElement e = this.SignedInfo.GetXml();
        document.AppendChild(document.ImportNode(e, true));               

        Transform canonicalizationMethodObject = this.SignedInfo.CanonicalizationMethodObject;            
        SetPrefix(prefix, document.DocumentElement); //Set the prefix before getting the HASH
        canonicalizationMethodObject.LoadInput(document);
        return canonicalizationMethodObject.GetDigestedOutput(hash);
    }

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

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

< 坚固 > 以及使用它的方法 < / 坚固 >

CustomSignedXml signedXml = new CustomSignedXml();

//compute the signature with the "ds" prefix

signedXml.ComputeSignature("ds");

//get the xml of the signature with the "ds" prefix

XmlElement xmlDigitalSignature = signedXml.GetXml("ds");

尝试在您签名前将此属性 < strong> xmlns:ds=" http://www.w3. org/2000/09/xmldsig#" 添加到您 XML 文档的根标记上。 我的情况有助于封装签名, 但我使用加密API。 希望这能帮助您 。