XML数字签名Java

我需要用JAVA对XML消息进行数字签名： 生成的XML签名应具有以下格式：

<Signature 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="">
<Transforms>
<Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
</Transforms>
<DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
<DigestValue>DsP5NLca+plhp9tZvGwykfb2whQYt3CQ5sbsVd9Q9aE=</DigestValue>
</Reference>
</SignedInfo>
<SignatureValue>
LrfE0po3YPvVxB/m77iBWWiR07Ghiuhuj7tO2C2LKqZK2cLrAiidt+3tjbJ3m16quCFxfh7bmjRtJsGi7a3HKtK
qY4auqrjNB62AtYrxvm+7Qd/cRacom4e3M9uF9JD1zTfoGun9w4WDfDrDaoZ+ZwUgNtf6sTYO5Ctcj5sYcD0=
</SignatureValue>
<KeyInfo>
<KeyName>7D665C81ABBE1A7D0E525BFC171F04D276F07BF2</KeyName>
</KeyInfo>
</Signature>

但问题是我得到了：

<SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>

而不是：

<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256" />

---

这些是标准的XML签名。有关如何执行此操作的说明，请参阅。通过在google上的快速搜索，可以找到Oracle编写的关于Java中XML签名集成的指南：。如果您还有其他问题，请向我们展示您的尝试。

以下是解决方案：

我在这个链接上找到它 问题在于RSA-SHA256算法：

以下是生成的代码：

private static Document sign(Document doc) throws InstantiationException, IllegalAccessException, ClassNotFoundException,
            NoSuchAlgorithmException, InvalidAlgorithmParameterException, KeyException, MarshalException, XMLSignatureException,
            FileNotFoundException, TransformerException {

        String providerName = System.getProperty("jsr105Provider", "org.jcp.xml.dsig.internal.dom.XMLDSigRI");

        XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM", (Provider) Class.forName(providerName).newInstance());

        DigestMethod digestMethod = fac.newDigestMethod(DigestMethod.SHA256, null);
        Transform transform = fac.newTransform(ENVELOPED, (TransformParameterSpec) null);
        Reference reference = fac.newReference("", digestMethod, singletonList(transform), null, null);
        SignatureMethod signatureMethod = fac.newSignatureMethod("http://www.w3.org/2001/04/xmldsig-more#rsa-sha256", null);
        CanonicalizationMethod canonicalizationMethod = fac.newCanonicalizationMethod(EXCLUSIVE, (C14NMethodParameterSpec) null);

        // Create the SignedInfo
        SignedInfo si = fac.newSignedInfo(canonicalizationMethod, signatureMethod, singletonList(reference));


        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
        kpg.initialize(2048);

        KeyPair kp = kpg.generateKeyPair();

        KeyInfoFactory kif = fac.getKeyInfoFactory();
        KeyValue kv = kif.newKeyValue(kp.getPublic());

        // Create a KeyInfo and add the KeyValue to it
        KeyInfo ki = kif.newKeyInfo(Collections.singletonList(kv));
        DOMSignContext dsc = new DOMSignContext(kp.getPrivate(), doc.getDocumentElement());

        XMLSignature signature = fac.newXMLSignature(si, ki);
        signature.sign(dsc);

        TransformerFactory tf = TransformerFactory.newInstance();
        Transformer trans = tf.newTransformer();

        // output the resulting document
        OutputStream os;

        os = new FileOutputStream("xmlOut.xml");

        trans.transform(new DOMSource(doc), new StreamResult(os));
        return doc;

    }

您得到了

，因为这就是您所要求的：

fac.newSignatureMethod（SignatureMethod.RSA\u SHA1，null）

。 正如您所了解和说明的，

fac.newSignatureMethod（“http://www.w3.org/2001/04/xmldsig-more#rsa-sha256“，（SignatureMethodParameterSpec）null）

将为您提供

private static Document sign(Document doc) throws InstantiationException, IllegalAccessException, ClassNotFoundException,
            NoSuchAlgorithmException, InvalidAlgorithmParameterException, KeyException, MarshalException, XMLSignatureException,
            FileNotFoundException, TransformerException {

        String providerName = System.getProperty("jsr105Provider", "org.jcp.xml.dsig.internal.dom.XMLDSigRI");

        XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM", (Provider) Class.forName(providerName).newInstance());

        DigestMethod digestMethod = fac.newDigestMethod(DigestMethod.SHA256, null);
        Transform transform = fac.newTransform(ENVELOPED, (TransformParameterSpec) null);
        Reference reference = fac.newReference("", digestMethod, singletonList(transform), null, null);
        SignatureMethod signatureMethod = fac.newSignatureMethod("http://www.w3.org/2001/04/xmldsig-more#rsa-sha256", null);
        CanonicalizationMethod canonicalizationMethod = fac.newCanonicalizationMethod(EXCLUSIVE, (C14NMethodParameterSpec) null);

        // Create the SignedInfo
        SignedInfo si = fac.newSignedInfo(canonicalizationMethod, signatureMethod, singletonList(reference));


        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
        kpg.initialize(2048);

        KeyPair kp = kpg.generateKeyPair();

        KeyInfoFactory kif = fac.getKeyInfoFactory();
        KeyValue kv = kif.newKeyValue(kp.getPublic());

        // Create a KeyInfo and add the KeyValue to it
        KeyInfo ki = kif.newKeyInfo(Collections.singletonList(kv));
        DOMSignContext dsc = new DOMSignContext(kp.getPrivate(), doc.getDocumentElement());

        XMLSignature signature = fac.newXMLSignature(si, ki);
        signature.sign(dsc);

        TransformerFactory tf = TransformerFactory.newInstance();
        Transformer trans = tf.newTransformer();

        // output the resulting document
        OutputStream os;

        os = new FileOutputStream("xmlOut.xml");

        trans.transform(new DOMSource(doc), new StreamResult(os));
        return doc;

    }