我一直在努力让它工作，但我不断遇到异常 当我尝试为我的特定元素创建数字签名时 XML 文档。源文档是 SOAP 信封，程序 解析文件中的数据并创建 Document 对象。 基本上我想做的是创建一个数字签名 多个部分/引用...主要是 SOAP 主体和时间戳 SOAP header 的安全节点下的节点。所以现在我是 尝试对 SOAP 消息的正文部分进行签名。 SOAP 主体有一个 wsu:Id 值，我在创建引用对象时使用该值。 我正在使用 securityNode 引用来插入签名节点 无论如何，那是它应该在的地方。我认为这不是问题 但我想我应该声明以防万一。我想我正在做这个 是的，但它不起作用。我看到有人发了同样的问题 但没有给出答复。
我已经尝试了很多不同的事情，只要我指定 URI 创建引用对象然后我得到异常。奇怪的 事情是在签署时抛出异常 语境。我这样做对吗？我该如何纠正这个问题？任何帮助都是 非常感谢。
//********* EXCEPTION *********
Exception in thread "main" javax.xml.crypto.dsig.XMLSignatureException: javax.xml.crypto.URIReferenceException: java.lang.NullPointerException at org.jcp.xml.dsig.internal.dom.DOMReference.dereference(Unknown Source) at org.jcp.xml.dsig.internal.dom.DOMReference.digest(Unknown Source) at org.jcp.xml.dsig.internal.dom.DOMXMLSignature.digestReference(Unknown Source) at org.jcp.xml.dsig.internal.dom.DOMXMLSignature.sign(Unknown Source) at XMLDsigTester.main(XMLDsigTester.java:163) Caused by: javax.xml.crypto.URIReferenceException: java.lang.NullPointerException at org.jcp.xml.dsig.internal.dom.DOMURIDereferencer.dereference(Unknown Source) ... 5 more Caused by: java.lang.NullPointerException at com.sun.org.apache.xml.internal.security.utils.resolver.implementations.ResolverDirectHTTP.engineCanResolve(Unknown Source) at com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolver.canResolve(Unknown Source) at com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolver.getInstance(Unknown Source) ... 6 more javax.xml.crypto.URIReferenceException: java.lang.NullPointerException at org.jcp.xml.dsig.internal.dom.DOMURIDereferencer.dereference(Unknown Source) at org.jcp.xml.dsig.internal.dom.DOMReference.dereference(Unknown Source) at org.jcp.xml.dsig.internal.dom.DOMReference.digest(Unknown Source) at org.jcp.xml.dsig.internal.dom.DOMXMLSignature.digestReference(Unknown Source) at org.jcp.xml.dsig.internal.dom.DOMXMLSignature.sign(Unknown Source) at XMLDsigTester.main(XMLDsigTester.java:163) Caused by: java.lang.NullPointerException at com.sun.org.apache.xml.internal.security.utils.resolver.implementations.ResolverDirectHTTP.engineCanResolve(Unknown Source) at com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolver.canResolve(Unknown Source) at com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolver.getInstance(Unknown Source) ... 6 more
//******************** JAVA CLass ********************
import javax.xml.crypto.*;
import javax.xml.crypto.dsig.*;
import javax.xml.crypto.dom.*;
import javax.xml.crypto.dsig.dom.DOMSignContext;
import javax.xml.crypto.dsig.keyinfo.*;
import javax.xml.crypto.dsig.spec.TransformParameterSpec;
import javax.xml.crypto.dsig.spec.C14NMethodParameterSpec;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.security.*;
import java.util.Collections;
import java.util.Iterator;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.*;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.*;
public class XMLDsigTester
{
public static void main(String[] args) throws Exception
{
////////////// DECLARATIONS //////////////////
final String ENVELOPE_TAG = "Envelope";
final String HEADER_TAG = "Header";
final String SECURITY_TAG = "Security";
final String BODY_TAG = "Body";
final String SEPARATOR = ":";
Node envelopeNode = null;
Node headerNode = null;
Node bodyNode = null;
NodeList envelopeChildren = null;
NodeList headerChildren = null;
Node childNode = null;
Node securityNode = null;
String providerName = null;
String sEnvelopeNamespace = null;
String sFullHeaderTagName = null;
String sFullBodyTagName = null;
String sNodeName = null;
int iEnvelopeChildren;
int iHeaderChildren;
////////////// START OF LOGIC //////////////////
providerName = System.getProperty("jsr105Provider", "org.jcp.xml.dsig.internal.dom.XMLDSigRI");
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
Document doc = dbf.newDocumentBuilder().parse(new FileInputStream("myfile.xml"));
Provider providerObj = (Provider) Class.forName(providerName).newInstance();
/// Create references to the Envelope, Header, Body and Security nodes ///
envelopeNode = doc.getDocumentElement();
envelopeChildren = envelopeNode.getChildNodes();
iEnvelopeChildren = envelopeChildren.getLength();
sEnvelopeNamespace = envelopeNode.getPrefix();
if (sEnvelopeNamespace != null && !sEnvelopeNamespace.trim().equals(""))
{
sFullHeaderTagName = sEnvelopeNamespace.trim().concat(SEPARATOR).concat(HEADER_TAG);
sFullBodyTagName = sEnvelopeNamespace.trim().concat(SEPARATOR).concat(BODY_TAG);
}
else
{
sFullHeaderTagName = HEADER_TAG;
sFullBodyTagName = BODY_TAG;
}
for (int i=0; i < iEnvelopeChildren; i++)
{
sNodeName = null;
childNode = null;
childNode = envelopeChildren.item(i);
sNodeName = childNode.getNodeName().trim();
if (sNodeName.equalsIgnoreCase(sFullHeaderTagName))
headerNode = childNode;
else if (sNodeName.equalsIgnoreCase(sFullBodyTagName))
bodyNode = childNode;
}
headerChildren = headerNode.getChildNodes();
iHeaderChildren = headerChildren.getLength();
String sLocalNodeName = null;
for (int i=0; i < iHeaderChildren; i++)
{
sLocalNodeName = null;
sNodeName = null;
childNode = null;
childNode = headerChildren.item(i);
sNodeName = childNode.getNodeName().trim();
sLocalNodeName = childNode.getLocalName();
if (sLocalNodeName != null)
if (sLocalNodeName.trim().equalsIgnoreCase(SECURITY_TAG))
{
securityNode = childNode;
break;
}
}
/// Main logic for generating XML signature ///
XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM", providerObj);
KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
kpg.initialize(512);
KeyPair kp = kpg.generateKeyPair();
KeyInfoFactory kif = fac.getKeyInfoFactory();
KeyValue kv = kif.newKeyValue(kp.getPublic());
KeyInfo ki = kif.newKeyInfo(Collections.singletonList(kv));
DOMSignContext dsc = new DOMSignContext(kp.getPrivate(), securityNode);
dsc.putNamespacePrefix("http://www.w3.org/2000/09/xmldsig#", "ds");
DigestMethod digestMethod = fac.newDigestMethod(DigestMethod.SHA1, null);
Transform transformObj = fac.newTransform(CanonicalizationMethod.EXCLUSIVE, (TransformParameterSpec) null);
Reference ref = fac.newReference("part-Body-4F4332715C4C1670E10080000A441E26", digestMethod, Collections.singletonList(transformObj), null, null);
CanonicalizationMethod canonMethodObj = fac.newCanonicalizationMethod(CanonicalizationMethod.EXCLUSIVE, (C14NMethodParameterSpec) null);
SignatureMethod signatureMethodObj = fac.newSignatureMethod(SignatureMethod.RSA_SHA1, null);
SignedInfo si = fac.newSignedInfo(canonMethodObj, signatureMethodObj, Collections.singletonList(ref));
XMLSignature signature = fac.newXMLSignature(si, ki);
signature.sign(dsc);
TransformerFactory tf = TransformerFactory.newInstance();
Transformer trans = tf.newTransformer();
trans.transform(new DOMSource(doc), new StreamResult(new FileOutputStream("mySignedFile.xml")));
}
} <br>
//******************** INPUT DATA ********************
<soap-env:Envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">
<soap-env:Header>
<wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
<wsu:Timestamp wsu:Id="ts-4F43326F5C4C1670E10080000A441E26">
<wsu:Created>2012-09-30T22:09:55Z</wsu:Created>
<wsu:Expires>2012-09-30T22:14:55Z</wsu:Expires>
</wsu:Timestamp>
</wsse:Security>
<wsa:Action soap-env:mustUnderstand="1" xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing"/>
<wsa:MessageID xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing">uuid:4f43f2ff-38aa-1a90-e100-80000a441e26</wsa:MessageID>
</soap-env:Header>
<soap-env:Body wsu:Id="part-Body-4F4332715C4C1670E10080000A441E26" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
<PurchaseOrder>
<Customer>
<Name>Robert Smith</Name>
<CustomerId>788335</CustomerId>
</Customer>
<Item partNum="C763">
<ProductId>6883-JF3</ProductId>
<Quantity>3</Quantity>
<ShipDate>2002-09-03</ShipDate>
<Name>ThinkPad X20</Name>
</Item>
</PurchaseOrder>
</soap-env:Body>
</soap-env:Envelope>
最佳答案
我希望还不算太晚:)。我已经根据您的输入对您的代码进行了一些测试。您需要知道的第一件事是您需要使用“#nodeId”指定节点名称，在您的示例中应该是“#part-Body-4F4332715C4C1670E10080000A441E26”(您缺少“#”符号)。下一个问题与“wsu”命名空间中的“Id”有关；如果它只是“Id”而不是“wsu:Id”，您的代码将找到“soap-env:Body”节点，但事实并非如此。如果您可以添加额外的“Id”属性或修改示例之一以删除“wsu”命名空间前缀，那么您就完成了。如果不这样做，那么您需要进行一些修改，添加一个转换，以便您可以选择要签名的节点。您应该替换您的行:
Transform transformObj = fac.newTransform(CanonicalizationMethod.EXCLUSIVE, (TransformParameterSpec) null);
Reference ref = fac.newReference("part-Body-4F4332715C4C1670E10080000A441E26", digestMethod, Collections.singletonList(transformObj), null, null);
与:
List<Transform> transforms = new ArrayList<Transform>(2);
Map<String, String> namespaces = new HashMap<String, String>(1);
namespaces.put("soap-env", "http://schemas.xmlsoap.org/soap/envelope/");
XPathFilterParameterSpec paramsXpath = new XPathFilterParameterSpec("/soap-env:Envelope/soap-env:Body", namespaces);
transforms.add(fac.newTransform(Transform.XPATH, (TransformParameterSpec) paramsXpath));
Transform transformObj = fac.newTransform(Transform.ENVELOPED, (TransformParameterSpec) null);
transforms.add(transformObj);
Reference ref = fac.newReference("", digestMethod, transforms, null, null);
在此新代码中，您将向引用添加一个转换，该转换使用 XPath 从您提供的 xml 输入中选择“soap-env:Body”节点。该节点将被签名并添加到“安全”节点。
关于java - 为特定 XML 元素/节点创建数字签名时引用 URI 错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/12678647/