当我签署包含命名空间前缀和命名空间引用的 XML 文档然后对其进行验证时，就会出现问题。在这种情况下，验证总是失败（返回 false）。当我从 XML 中删除命名空间前缀和命名空间引用时，签名和验证工作正常。
你可以帮帮我吗 ？
这是我的代码：
从 SignedXml 继承的类
namespace Xmldsig
{
using System;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.Xml;
public sealed class SignaturePropertiesSignedXml : SignedXml
{
private XmlDocument doc;
private XmlElement signaturePropertiesRoot;
private XmlElement qualifyingPropertiesRoot;
private string signaturePropertiesId;
public SignaturePropertiesSignedXml(XmlDocument doc)
: base(doc)
{
return;
}
public SignaturePropertiesSignedXml(XmlDocument doc, string signatureId, string propertiesId)
: base(doc)
{
this.signaturePropertiesId = propertiesId;
this.doc = null;
this.signaturePropertiesRoot = null;
if (string.IsNullOrEmpty(signatureId))
{
throw new ArgumentException("signatureId cannot be empty", "signatureId");
}
if (string.IsNullOrEmpty(propertiesId))
{
throw new ArgumentException("propertiesId cannot be empty", "propertiesId");
}
this.doc = doc;
base.Signature.Id = signatureId;
this.qualifyingPropertiesRoot = doc.CreateElement("QualifyingProperties", "http://www.w3.org/2000/09/xmldsig#");
this.qualifyingPropertiesRoot.SetAttribute("Target", "#" + signatureId);
this.signaturePropertiesRoot = doc.CreateElement("SignedProperties", "http://www.w3.org/2000/09/xmldsig#");
this.signaturePropertiesRoot.SetAttribute("Id", propertiesId);
qualifyingPropertiesRoot.AppendChild(signaturePropertiesRoot);
DataObject dataObject = new DataObject
{
Data = qualifyingPropertiesRoot.SelectNodes("."),
Id = "idObject"
};
AddObject(dataObject);
}
public void AddProperty(XmlElement content)
{
if (content == null)
{
throw new ArgumentNullException("content");
}
XmlElement newChild = this.doc.CreateElement("SignedSignatureProperties", "http://www.w3.org/2000/09/xmldsig#");
newChild.AppendChild(content);
this.signaturePropertiesRoot.AppendChild(newChild);
}
public override XmlElement GetIdElement(XmlDocument doc, string id)
{
if (String.Compare(id, signaturePropertiesId, StringComparison.OrdinalIgnoreCase) == 0)
return this.signaturePropertiesRoot;
if (String.Compare(id, this.KeyInfo.Id, StringComparison.OrdinalIgnoreCase) == 0)
return this.KeyInfo.GetXml();
return base.GetIdElement(doc, id);
}
}
}
签署xml的类
namespace Xmldsig
{
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Xml;
using System.IO;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.Security.Cryptography.X509Certificates;
using Security.Cryptography;
using System.Security.Principal;
using System.Collections;
public class VerifyResult
{
public string Timestamp { get; set; }
public X509Certificate2 SigningCertificate { get; set; }
}
public class XmldsigClass
{
public static XmlDocument SignDocument(XmlDocument doc, string RefUri)
{
string idSignProperties = "idSignedProperties";
SignaturePropertiesSignedXml signer = new SignaturePropertiesSignedXml(doc, "Uzb_sig_v001", idSignProperties);
X509Certificate2 cert = GetCertificate();
RSA key = (RSACryptoServiceProvider)cert.PrivateKey;
signer.SigningKey = key;
signer.SignedInfo.CanonicalizationMethod = "http://www.w3.org/2001/10/xml-exc-c14n#";
signer.SignedInfo.SignatureMethod = @"http://www.w3.org/2001/04/xmldsig-more#rsa-sha256";
// create a timestamp property
XmlElement timestamp = doc.CreateElement("SigningTime", SignedXml.XmlDsigNamespaceUrl);
timestamp.InnerText = DateTimeToCanonicalRepresentation();
signer.AddProperty(timestamp);
var certificateKeyInfo = new KeyInfo();
certificateKeyInfo.Id = "idKeyInfo";
certificateKeyInfo.AddClause(new KeyInfoX509Data(cert));
signer.KeyInfo = certificateKeyInfo;
Reference reference = new Reference(RefUri);
reference.DigestMethod = @"http://www.w3.org/2001/04/xmlenc#sha256";
reference.AddTransform(new XmlDsigEnvelopedSignatureTransform());
signer.AddReference(reference);
Reference propertiesRefki = new Reference();
propertiesRefki.Uri = "#idKeyInfo";
propertiesRefki.DigestMethod = @"http://www.w3.org/2001/04/xmlenc#sha256";
signer.AddReference(propertiesRefki);
Reference reference2 = new Reference();
reference2.Uri = "#" + idSignProperties;
reference2.DigestMethod = @"http://www.w3.org/2001/04/xmlenc#sha256";
signer.AddReference(reference2);
signer.ComputeSignature();
doc.DocumentElement.AppendChild(signer.GetXml());
return doc;
}
public static bool CheckSignature(XmlDocument xmlDoc)
{
SignedXml signedXml = new SignedXml(xmlDoc);
XmlNodeList elementsByTagName = xmlDoc.GetElementsByTagName("Signature");
signedXml.LoadXml((XmlElement)elementsByTagName[0]);
bool sigCheck = signedXml.CheckSignature();
return sigCheck;
}
private static X509Certificate2 GetCertificate()
{
X509Store store = new X509Store(StoreName.My, StoreLocation.CurrentUser);
store.Open(OpenFlags.ReadOnly);
X509Certificate2 card = null;
foreach (X509Certificate2 cert in store.Certificates)
{
if (!cert.HasPrivateKey) continue;
AsymmetricAlgorithm aa = cert.PrivateKey;
ICspAsymmetricAlgorithm caa = aa as ICspAsymmetricAlgorithm;
if (caa == null) continue;
if (caa.CspKeyContainerInfo.HardwareDevice)
{
card = cert;
break;
}
}
store.Close();
return card;
}
private static string DateTimeToCanonicalRepresentation()
{
var ahora = DateTime.Now.ToUniversalTime();
return ahora.Year.ToString("0000") + "-" + ahora.Month.ToString("00") +
"-" + ahora.Day.ToString("00") +
"T" + ahora.Hour.ToString("00") + ":" +
ahora.Minute.ToString("00") + ":" + ahora.Second.ToString("00") +
"Z";
}
}
}
在这里我调用签名方法
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.PreserveWhitespace = true;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
xmlDoc.Load(openFileDialog1.FileName);
XmlDocument resxml = Xmldsig.XmldsigClass.SignDocument(xmlDoc, "#Uzb_doc_v001");
var name = openFileDialog1.FileName + ".xml";
xmlDoc.Save(name);
var bytes = System.IO.File.ReadAllBytes(name);
System.IO.File.WriteAllBytes(name, bytes.Skip(3).ToArray());
MessageBox.Show("Signed");
}
并用于验证
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.PreserveWhitespace = true;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
xmlDoc.Load(openFileDialog1.FileName);
bool b = Xmldsig.XmldsigClass.CheckSignature(xmlDoc);
MessageBox.Show(b.ToString());
}
这是我签名的xml
<?xml version="1.0" encoding="utf-8" standalone="no"?>
<uz:CreditcardEnveloppe xmlns:uz="http://aaaa.com/CreditcardEnveloppe/transport" Id="Uzb_doc_v001" Version="1.0">
<uz:creditcard>
<uz:number>19834209</uz:number>
<uz:expiry>02/02/2002</uz:expiry>
</uz:creditcard>
<Signature Id="sig_v001" 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/2001/04/xmldsig-more#rsa-sha256" />
<Reference URI="#Uzb_doc_v001">
<Transforms>
<Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" />
</Transforms>
<DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
<DigestValue>RnpNXyhxQcjr/SWqVlWY31S1xpj2opZhlsT4d1iyBKI=</DigestValue>
</Reference>
<Reference URI="#idKeyInfo">
<DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
<DigestValue>O0Z2BU5ODwgOZOhpFvkcSaO/jmWFykBwnxMUD5a5SwM=</DigestValue>
</Reference>
<Reference URI="#idSignedProperties">
<DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
<DigestValue>UVjk8Jkq0Y6OxFqiB4q/4vqli/KJT5pYEPzlNTkfIhY=</DigestValue>
</Reference>
</SignedInfo>
<SignatureValue>prOZXn..</SignatureValue>
<KeyInfo Id="idKeyInfo">
<X509Data>
<X509Certificate>MIIE7TCCA9WgAwIBAgISESBS...</X509Certificate>
</X509Data>
</KeyInfo>
<Object Id="idObject">
<QualifyingProperties Target="#sig_v001">
<SignedProperties Id="idSignedProperties">
<SignedSignatureProperties>
<SigningTime>2011-03-30T06:01:48Z</SigningTime>
</SignedSignatureProperties>
</SignedProperties>
</QualifyingProperties>
</Object>
</Signature>
</uz:CreditcardEnveloppe>
预先感谢您！