javaweb-servicesws-security

Validating a Signature of a SOAP Message


Everybody, Hello!

This is my request message:

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap: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" soap:mustUnderstand="1">
     <wsse:BinarySecurityToken EncodingType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary" ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3" wsu:Id="X509-A3BCFAE87E12A8813813289737654441">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</wsse:BinarySecurityToken>
     <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Id="SIG-2">
        <ds:SignedInfo>
           <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#">
              <ec:InclusiveNamespaces xmlns:ec="http://www.w3.org/2001/10/xml-exc-c14n#" PrefixList="soap" />
           </ds:CanonicalizationMethod>
           <ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />
           <ds:Reference URI="#id-1">
              <ds:Transforms>
                 <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#">
                    <ec:InclusiveNamespaces xmlns:ec="http://www.w3.org/2001/10/xml-exc-c14n#" PrefixList="" />
                 </ds:Transform>
              </ds:Transforms>
              <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />
              <ds:DigestValue>RJhc1ZVjXdUQEIwLTH356p7H0QY=</ds:DigestValue>
           </ds:Reference>
        </ds:SignedInfo>
        <ds:SignatureValue>F0q0NV7kaSbAcsLHxVpYD1bQ1RAJcw6wPapDKAM9PIcs7EuS9S5PlE4cQMfAp1WgsKa91r3op1OQ5UrYmmdj/UneYawdPIYSaoFBGjndTXZnOCKp4YfRTQGZ2EVJRFHJbPsTsqHedPAyJLHhciViguTGeuA0hZAQN97KB/9ZLmY=</ds:SignatureValue>
        <ds:KeyInfo Id="KI-A3BCFAE87E12A8813813289737654452">
           <wsse:SecurityTokenReference wsu:Id="STR-A3BCFAE87E12A8813813289737654483">
              <wsse:Reference URI="#X509-A3BCFAE87E12A8813813289737654441" ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3" />
           </wsse:SecurityTokenReference>
        </ds:KeyInfo>
     </ds:Signature>
  </wsse:Security>
</soap:Header>
 <soap:Body xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="id-1">
  <stubMethod xmlns="http://ws_base.ws.stuff/" />
 </soap:Body>
</soap:Envelope>

I try to validate the <ds:DigestValue>RJhc1ZVjXdUQEIwLTH356p7H0QY=</ds:DigestValue> which is related to the body tag. There are tags like ds:CanonicalizationMethod and ds:Transformswhich are really confusing for me. My question is how to validate the body part? Firstly, what tag should I get to begin validation

<soap:Body xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="id-1">
  <stubMethod xmlns="http://ws_base.ws.stuff/" />
 </soap:Body>

or just

<stubMethod xmlns="http://ws_base.ws.stuff/" /> 

??? What operations (canonicalization / transformation / encryption) must I perform???

Any help is appreciate. Thanks in advance.


Solution

  • The solution is:

     private boolean validateSignature(Node signatureNode, Node bodyTag, PublicKey publicKey) {
        boolean signatureIsValid = false;
        try {
            // Create a DOM XMLSignatureFactory that will be used to unmarshal the
            // document containing the XMLSignature
            String providerName = System.getProperty
                    ("jsr105Provider", "org.jcp.xml.dsig.internal.dom.XMLDSigRI");
            XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM",
                    (Provider) Class.forName(providerName).newInstance());
    
            // Create a DOMValidateContext and specify a KeyValue KeySelector
            // and document context
            DOMValidateContext valContext = new DOMValidateContext(new X509KeySelector(publicKey), signatureNode);
            valContext.setIdAttributeNS((Element) bodyTag, "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd", "Id");
    
            // Unmarshal the XMLSignature.
            XMLSignature signature = fac.unmarshalXMLSignature(valContext);
            // Validate the XMLSignature.
            signatureIsValid = signature.validate(valContext);
    
        } catch (Exception ex) {
            logger.error("An Error Raised while Signature Validation");
            logger.error("Cause: " + ex.getCause());
            logger.error("Message: " + ex.getMessage());
        }
    
        return signatureIsValid;
    }
    

    where

    public class X509KeySelector extends KeySelector {
    
    PublicKey key;
    
    /**
     * Constructor.
     *
     * @param key a public key of a certificate which need to be validated.
     */
    public X509KeySelector(PublicKey key) {
        this.key = key;
    }
    
    /**
     * @return a KeySelectorResult with a predefined key.
     */
    public KeySelectorResult select(KeyInfo keyInfo,
                                    KeySelector.Purpose purpose,
                                    AlgorithmMethod method,
                                    XMLCryptoContext context) throws KeySelectorException {
        return new KeySelectorResult() {
            @Override
            public Key getKey() {
                return key;
            }
        };
    }
    
    }
    

    and give to the X509KeySelector a public key you need to validate the signature.