我想通过使用自签名X.509证书使用SHA256签名XML。我在#1启发了许多文章,并使用此代码:如何正确使用SHA256&X.509签名XML?
X509Certificate2 cert = new X509Certificate2();
X509Store store = new X509Store(StoreName.Root, StoreLocation.LocalMachine);
store.Open(OpenFlags.ReadOnly);
foreach (X509Certificate2 cert2 in store.Certificates)
{
if (cert2.Subject == "CN=TestCerificate")
{
cert = cert2;
break;
}
}
store.Close();
CryptoConfig.AddAlgorithm(typeof(RSAPKCS1SHA256SignatureDescription), "http://www.w3.org/2001/04/xmldsig-more#rsa-sha256");
var exportedKeyMaterial = cert.PrivateKey.ToXmlString(true);
var key = new RSACryptoServiceProvider(new CspParameters(24));
key.PersistKeyInCsp = false;
key.FromXmlString(exportedKeyMaterial);
XmlDocument doc = new XmlDocument();
doc.PreserveWhitespace = true;
doc.Load("test.xml");
SignedXml signedXml = new SignedXml(doc);
signedXml.SigningKey = key;
signedXml.SignedInfo.SignatureMethod = "http://www.w3.org/2001/04/xmldsig-more#rsa-sha256";
Reference reference = new Reference();
reference.AddTransform(new XmlDsigEnvelopedSignatureTransform());
reference.AddTransform(new XmlDsigExcC14NTransform());
reference.Uri = "";
reference.DigestMethod = "http://www.w3.org/2001/04/xmlenc#sha256";
signedXml.AddReference(reference);
KeyInfo keyInfo = new KeyInfo();
keyInfo.AddClause(new KeyInfoX509Data(cert));
signedXml.KeyInfo = keyInfo;
signedXml.ComputeSignature();
doc.Save("testSig.xml");
之后,的“testSig.xml”生成的XML签名的部分看起来像这样:
<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#dsa-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>ghOEPeYtAUs5Kb8VMOCIS3f2wIY=</DigestValue>
</Reference>
</SignedInfo>
<SignatureValue>HANI0GrICbyc5tlmvtU9cB7txdxtuY4uDsntp5XVzaRQbts76ff3Qg==</SignatureValue>
</Signature>
正如你所看到的XML说“SHA1”用于签名XML(参见节点“SignatureMethod”&“DigestMethod”)。但我期望,SHA256-URL必须在这些节点中说明。这个假设是否正确?如果是的话,是否有人知道如何解决这个问题?我使用C#4.6.0。
与问候, 迈克尔
您写的代码会生成签名,但不会将其放入文档(是否预先签名?)。您错过了对'GetXml()'的调用并将该节点插入到文档中。 – bartonjs
谢谢,这帮助我解决了我的问题。实际上,我忘了将已签名的XML-Node添加到我的xml文件中。来自上面的“错误”签名的xml部分来自另一个意外执行的代码片段。所以我有两个错误合并在一起。 :) – MichaelXanadu