使用“ds”前缀生成xml签名

时间：2012-05-25 14:18:10

标签： xml security cryptography signedxml

我使用signedxml生成了一个xml签名，验证效果很好。 我的签名xml如下所示

<Signature Id="orderSignature" 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"/>
                            </Transforms>
                            <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
                            <DigestValue>0r1BZecYgC4FzPIxuU9DYIbVqUE=</DigestValue>
                        </Reference>
                    </SignedInfo>
                    <SignatureValue>B+SreGOR7+QEnvo0zMgJsNgZ4gbA1leOifLGd09HG8lZD0ZxsBkcR0aauTgwRgeOefKSwah+KEqAlZvRNykgPjBmY9BJ2g6OfRdvm/mSj7ecDuq/Ic1vo5bHeFJHzr8qbS7IKS/hl/BOx+06yg5rFbVeQGYypznNLIKrjS5cfDbo11e6tpLWswZMxhly8c+FHuMKzAJKOw4spbebgVT4p/vGYsPekTRtvtLtqp1yVl1za8xWkqXmbPPxwio7rXFpKWAqdLQiHYW0cs8ARXUo2jSjete+m4+wQ3QpN4Wfj8Cs3+bYsh01r1XHUG48w3PGt11+trlIEABCaQrhgj9xzg==</SignatureValue>
                    <KeyInfo>
                        <KeyValue>
                            <RSAKeyValue>
                                <Modulus>z9KDoRUO4alAwhL2Nq2fIAwsbecLuWYnzwKEX2WsUOWmhXksD+uYqjRqrKpV9j2tWFf6Ba87zEEa5xPOgD9Jj5naq6tDuH9q48u2gosC3vohPTNXL1I1sj9NTYIFNN+xcf/hi7fPQa/yq5lPOwN45kblee8Z6MqVt6Jk5ytQ+jMT6ZMStL6dOASKbwROfb0uhdmOieX60CGNAbdrn/ei2Vr2EOVmHSB1ZqZ0EhaFTKK5PPuiDlptl+bH0KBqkYEcMgzGMgxNJbDM/MlHgXWh9IWTS/A64awy8xUEQwq9QCibYzI5WCDceyTiNSAVhBQDMEX4YyWDj52sceKEK/q9NQ==</Modulus>
                                <Exponent>AQAB</Exponent>
                            </RSAKeyValue>
                        </KeyValue>
                        <X509Data>
                            <X509IssuerSerial>
                                <X509IssuerName>CN=Mali Mühür Elektronik Sertifika Hizmet Sağlayıcısı - Sürüm 1, C=TR</X509IssuerName>
                                <X509SerialNumber>97806797770378</X509SerialNumber>
                            </X509IssuerSerial>
                            <X509SubjectName>CN=Bimtel İletişim Ve Bilişim Ticaret Limited Şirketi, SERIALNUMBER=1750422091</X509SubjectName>
                            <X509Certificate>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</X509Certificate>
                        </X509Data>
                    </KeyInfo>
                </Signature>

但我需要使用“ds：”前缀生成xml签名。

我无法在stackoverflow中找到关于此问题的sollution。

如何获取带前缀的xml签名？ 是否可以使用signedxml（System.Security.Cryptography.Xml）库，

或者我可以生成任何库吗？

感谢您的任何建议..

3 个答案:

答案 0 :(得分：2)

我真的不明白为什么要在命名空间中添加ds前缀。

有这个：

<ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Id="Signature">
  <ds:SignedInfo Id="SignedInfo">
 <ds:CanonicalizationMethod ...

完全等同于：

<Signature xmlns="http://www.w3.org/2000/09/xmldsig#" Id="Signature">
   <SignedInfo Id="SignedInfo">
 <CanonicalizationMethod ...

在第一种情况下，您必须为http://www.w3.org/2000/09/xmldsig#命名空间中的元素指定ds，在第二种情况下，此命名空间是默认命名空间，因此xml中没有声明前缀的每个元素都来自此命名空间。

此外，您说您需要添加ds前缀才能拥有XAdES-BES，并且您可以对xmldsig和xades签名之间的区别进行评论。您必须知道XAdES只是一个规范，它说明XMLDSIG签名需要哪些属性才能成为XAdES签名。大致XAdES是一个XMLDSIG签名，其中包含：<Object http://www.w3.org/2000/09/xmldsig#>，它将成为整个限定属性集的包，其中一些是签名的（signedProperties），其中一些是unsigned（unsignedProperties）。对于XAdES-BES案例，您必须在<xades:SigningCertificate xmlns:xades="http://uri.etsi.org/01903/v1.3.2#">元素中添加<xades:SignedProperties>。

这里我举一个XAdES-BES签名“没有”ds前缀的例子。

<Signature xmlns="http://www.w3.org/2000/09/xmldsig#" Id="Signature">
<SignedInfo Id="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 Id="SignedProperties-Reference" Type="http://uri.etsi.org/01903/v1.2.2#SignedProperties" URI="#SignedProperties">
        <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
        <DigestValue>fiKTaqJzLSmC73cMXZSzjhd877w=</DigestValue>
    </Reference>
    <Reference Id="SignedDataObject-Reference-1" URI="DetachedObjectReference-1">
        <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
        <DigestValue>8ruIS/4MRp2wAwVX4/pTCYxTyWc=</DigestValue>
    </Reference>
</SignedInfo>
<SignatureValue Id="DocumentSignatureValue">
    R40YdEEEl0YIZVdl4pm3yyF7qGAG8ZN8PPf0aBRXbvRgdIcvJZtI5AS5NexaO5T4O0gMHWRIKjNb
    2QzlfwxlQ3/KqMW4W0QkMLpF4csBpXt9bJ3t+smEeTnxkBcQRXAw5v9kwf20mfz1LtIUhbsU/PMd
    YwaGCsItF2rzl3rtcq4=
</SignatureValue>
<KeyInfo Id="KeyInfo">
    <X509Data>
        <X509Certificate>
            MIIIUTCCBzmgAwI...
        </X509Certificate>
    </X509Data>
    <KeyValue>
        <RSAKeyValue>
            <Modulus>
              pb0cJiodddCDVe/t+7...
            </Modulus>
            <Exponent>AQAB</Exponent>
        </RSAKeyValue>
    </KeyValue>
</KeyInfo>
<Object>
    <xades:QualifyingProperties xmlns:xades="http://uri.etsi.org/01903/v1.3.2#" Id="QualifyingProperties" Target="#Signature">
        <xades:SignedProperties Id="SignedProperties">
            <xades:SignedSignatureProperties>
                <xades:SigningCertificate>
                    <xades:Cert>
                        <xades:CertDigest>
                            <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
                            <DigestValue>UZq4NIL9eVVA7aJixPeiUTM3nOM=</DigestValue>
                        </xades:CertDigest>
                        <xades:IssuerSerial>
                            <X509IssuerName>XXXXXXXXXXXX....</X509IssuerName>
                            <X509SerialNumber>705964899...</X509SerialNumber>
                        </xades:IssuerSerial>
                    </xades:Cert>
                </xades:SigningCertificate>
            </xades:SignedSignatureProperties>
            <xades:SignedDataObjectProperties/>
        </xades:SignedProperties>
    </xades:QualifyingProperties>
</Object>

希望这有帮助，

答案 1 :(得分：1)

尝试在签名之前将此属性 xmlns：ds =“http://www.w3.org/2000/09/xmldsig#”添加到XML文档的根标记中。我的情况下它有助于封装签名，但我使用的是Crypto API。希望这会对你有所帮助。

答案 2 :(得分：1)

经过大量研究，我找到了答案。 基本上，在获取SignedInfo节点的摘要值之前，必须修改SignedXml类以添加前缀。

将修改ComputeSignature方法以添加前缀参数

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

当调用此方法时，如果在没有＆＃34; ds＆＃34;的情况下获得此值，则通过消化SignedInfo节点的值来计算签名值。前缀然后添加前缀，您将获得无效的签名，因此您必须在获取signedinfo节点的摘要值之前添加前缀。

此摘要值在GetC14NDigest方法中生成，因此将修改此方法以添加前缀参数并在获取摘要值之前添加前缀

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);
}

好的，现在你有了SIGNInfo节点的Signature Value和＆＃34; ds＆＃34;前缀，据说你仍然没有前缀的xml，所以如果你只是调用GetXml方法，你将看不到＆＃34; ds＆＃34;前缀，当然因为签名值是根据ds前缀计算的，所以你的签名无效。 为了避免这种情况并获得带有前缀的xml结构，您必须修改GetXml方法，添加前缀参数，并调用SetPrefix方法，它将添加＆＃34; ds＆＃34; Signature Xml中所有节点的前缀

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

我将带着这些修改离开这里

CUSTOM CLASS 

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;
    }
}

以及使用它的方式 

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");
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