Question

我需要将数字签名作为参数发送到外部Web服务。

根据文档创建的步骤是：

创建DOM数据的XML表示
创建DOM数据的规范化表示。规范化表示应遵循http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments;
为规范化表示的RSA摘要创建签名SHA1加密。签名使用Participant的私钥加密;
将二进制签名编码为base64编码的字符串
将签名字符串放在SOAP消息ReqDigSig元素中;
存储以后可能需要的XML数据，以支持提交的XML数据的不可否认性。

我使用了以下代码：

private string SignXML(X509Certificate2 Cert, string data)
    {
        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.PreserveWhitespace = false;
        xmlDoc.LoadXml(data);

        XmlDsigC14NWithCommentsTransform t = new XmlDsigC14NWithCommentsTransform();
        t.LoadInput(xmlDoc);
        Stream s = (Stream)t.GetOutput(typeof(Stream));

        SHA1 sha1 = SHA1.Create();
        byte[] hash = sha1.ComputeHash(s);


        RSACryptoServiceProvider rsaKey =
        (RSACryptoServiceProvider)Cert.PrivateKey;
        RSAParameters rsaPrivateParams = rsaKey.ExportParameters(true);
        rsaKey.ImportParameters(rsaPrivateParams);
        byte[] signature =  rsaKey.Encrypt(hash, false);

        return Convert.ToBase64String(signature);
    }

但网络服务的响应表明数字签名验证错误。

是上面的代码，根据文档中的描述？我如何验证数字签名是否有效？有没有在线工具？

[后期编辑如下] 我尝试过使用以下内容。我已验证签名，它返回true。但是从Web服务端失败了。 signData，signHash和rsaPKCsignatureformatter类之间的区别是什么？创造签名方法？

        var document = Encoding.UTF8.GetBytes(Reqdata);

        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.PreserveWhitespace = false;
        xmlDoc.LoadXml(Reqdata);

        //trial with XmlDsigC14NWithCommentsTransform class
        XmlDsigC14NWithCommentsTransform t = new XmlDsigC14NWithCommentsTransform();
        t.LoadInput(xmlDoc);
        Stream s = (Stream)t.GetOutput(typeof(Stream));

        //trial with SignedXML class
        SignedXml signedXml = new SignedXml(xmlDoc);
        signedXml.SignedInfo.CanonicalizationMethod =
        SignedXml.XmlDsigC14NWithCommentsTransformUrl;
        document = Encoding.UTF8.GetBytes(signedXml.ToString());

        byte[] hashedDocument;

        using (var sha1 = SHA1.Create())
        {
            //hashedDocument = sha1.ComputeHash(document);
            hashedDocument = sha1.ComputeHash(s);
        }

        var digitalSignature = new DigitalSignature();
        digitalSignature.AssignNewKey();

        byte[] signature = digitalSignature.SignData(hashedDocument);
        string finalsignature = Convert.ToBase64String(signature) ;
        byte[] finalSignveri = Convert.FromBase64String(finalsignature);
        bool verified = digitalSignature.VerifySignature(hashedDocument, finalSignveri);

，数字签名类如下：

public class DigitalSignature
{
    private RSAParameters publicKey;
    private RSAParameters privateKey;

    public void AssignNewKey()
    {
        using (var rsa = new RSACryptoServiceProvider())
        {
            rsa.PersistKeyInCsp = false;
            publicKey = rsa.ExportParameters(false);
            privateKey = rsa.ExportParameters(true);
        }
    }

    public byte[] SignData(byte[] hashOfDataToSign)
    {
        using (var rsa = new RSACryptoServiceProvider())
        {
            rsa.PersistKeyInCsp = false;
            rsa.ImportParameters(privateKey);

            var rsaFormatter = new RSAPKCS1SignatureFormatter(rsa);
            rsaFormatter.SetHashAlgorithm("SHA1");

            return rsaFormatter.CreateSignature(hashOfDataToSign);
        }
    }

    public bool VerifySignature(byte[] hashOfDataToSign, byte[] signature)
    {
        using (var rsa = new RSACryptoServiceProvider())
        {
            rsa.ImportParameters(publicKey);

            var rsaDeformatter = new RSAPKCS1SignatureDeformatter(rsa);
            rsaDeformatter.SetHashAlgorithm("SHA1");

            return rsaDeformatter.VerifySignature(hashOfDataToSign, signature);
        }
    }   
}

您能否告诉我您在wsdl中特别寻找的数据？抱歉，我无法在此处提供完整的wsdl信息。

返回的错误是我相信用户处理并说明＆＃34;数字签名验证错误＆＃34;

[Redited]

请在下面找到在java中生成数字签名的代码片段。这是由第三方发送的，以供参考。我不是一个java开发人员。如果我编写的C＃代码对应于Java代码，有人可以告诉我吗？如果没有，请让我知道我哪里出错。

private static String createDigitalSignature(Key key, byte[] data) {

    byte[] signature = null;

    try {
        // Initialize xml-security library
        org.apache.xml.security.Init.init();

        // Build DOM document from XML data
        DocumentBuilderFactory dfactory = DocumentBuilderFactory
                .newInstance();
        dfactory.setNamespaceAware(true);
        dfactory.setValidating(true);
        DocumentBuilder documentBuilder = dfactory.newDocumentBuilder();
        // This is to throw away all validation errors
        documentBuilder
                .setErrorHandler(new org.apache.xml.security.utils.IgnoreAllErrorHandler());
        Document doc = documentBuilder
                .parse(new ByteArrayInputStream(data));

        // Build canonicalized XML from document
        Canonicalizer c14n = Canonicalizer
                .getInstance("http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments");
        byte[] canonBytes = c14n.canonicalizeSubtree(doc);

        // Initialize signing object with SHA1 digest and RSA encryption
        Signature rsa = Signature.getInstance("SHA1withRSA");

        // Set private key into signing object
        rsa.initSign((PrivateKey) key);

        // Generate signature
        rsa.update(canonBytes);
        signature = rsa.sign();
    } catch (Exception ex) {
        System.out.println("Exception occurred in createDigitalSignature: "
                + ex.toString());
        System.exit(-1);
    }

    // Base64 encode signature
    BASE64Encoder b64e = new BASE64Encoder();
    String signatureString = b64e.encode(signature);

    return signatureString;
}

Answer 1

在步骤3，数字签名与加密摘要不完全相同。具有pkcs#1格式的rsa数字签名将摘要算法OID（标识符）与摘要值连接起来。因此，您正在生成无效签名。

所有编程语言都有一种方法来执行数字签名而无需处理摘要和密码。我不是C＃程序员，但我想你必须使用RSACryptoServiceProvider.SignData

还可以使用VerifyData来验证签名

访问网络服务的数字签名验证错误

1 个答案: