Chapter 345. XML Security Component

Available as of Camel version 2.12

With this Apache Camel component, you can generate and validate XML signatures as described in the W3C standard XML Signature Syntax and Processing or as described in the successor version 1.1. For XML Encryption support, please refer to the XML Security Data Format.

You can find an introduction to XML signature here. The implementation of the component is based on JSR 105, the Java API corresponding to the W3C standard and supports the Apache Santuario and the JDK provider for JSR 105. The implementation will first try to use the Apache Santuario provider; if it does not find the Santuario provider, it will use the JDK provider. Further, the implementation is DOM based.

Since Camel 2.15.0 we also provide support for XAdES-BES/EPES for the signer endpoint; see subsection "XAdES-BES/EPES for the Signer Endpoint".

Maven users will need to add the following dependency to their pom.xml for this component:

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-xmlsecurity</artifactId>
    <version>x.x.x</version>
    <!-- use the same version as your Camel core version -->
</dependency>

345.1. XML Signature Wrapping Modes

XML Signature differs between enveloped, enveloping, and detached XML signature. In the enveloped XML signature case, the XML Signature is wrapped by the signed XML Document; which means that the XML signature element is a child element of a parent element, which belongs to the signed XML Document. In the enveloping XML signature case, the XML Signature contains the signed content. All other cases are called detached XML signatures. A certain form of detached XML signature is supported since 2.14.0.

In the enveloped XML signature case, the supported generated XML signature has the following structure (Variables are surrounded by []).

<[parent element]>
   ... <!-- Signature element is added as last child of the parent element-->
   <Signature Id="generated_unique_signature_id">
       <SignedInfo>
             <Reference URI="">
                   <Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
                   (<Transform>)* <!-- By default "http://www.w3.org/2006/12/xml-c14n11" is added to the transforms -->
                   <DigestMethod>
                   <DigestValue>
             </Reference>
             (<Reference URI="#[keyinfo_Id]">
                   <Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
                   <DigestMethod>
                   <DigestValue>
             </Reference>)?
             <!-- further references possible, see option 'properties' below -->
      </SignedInfo>
      <SignatureValue>
      (<KeyInfo Id="[keyinfo_id]">)?
      <!-- Object elements possible, see option 'properties' below -->
  </Signature>
</[parent element]>

In the enveloping XML signature case, the supported generated XML signature has the structure:

<Signature Id="generated_unique_signature_id">
  <SignedInfo>
         <Reference URI="#generated_unique_object_id" type="[optional_type_value]">
               (<Transform>)* <!-- By default "http://www.w3.org/2006/12/xml-c14n11" is added to the transforms -->
               <DigestMethod>
               <DigestValue>
         </Reference>
         (<Reference URI="#[keyinfo_id]">
               <Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
               <DigestMethod>
               <DigestValue>
         </Reference>)?
          <!-- further references possible, see option 'properties' below  -->
  </SignedInfo>
  <SignatureValue>
  (<KeyInfo Id="[keyinfo_id]">)?
  <Object Id="generated_unique_object_id"/> <!-- The Object element contains the in-message body; the object ID can either be generated or set by the option parameter "contentObjectId" -->
  <!-- Further Object elements possible, see option 'properties' below -->
</Signature>

As of 2.14.0 detached XML signatures with the following structure are supported (see also sub-chapter XML Signatures as Siblings of Signed Elements):

(<[signed element] Id="[id_value]">
<!-- signed element must have an attribute of type ID -->
      ...

</[signed element]>
<other sibling/>* 
<!-- between the signed element and the corresponding signature element, there can be other siblings.
 Signature element is added as last sibling. -->
<Signature Id="generated_unique_ID">
   <SignedInfo>
      <CanonicalizationMethod>
      <SignatureMethod>
      <Reference URI="#[id_value]" type="[optional_type_value]">
      <!-- reference URI contains the ID attribute value of the signed element -->
            (<Transform>)* <!-- By default "http://www.w3.org/2006/12/xml-c14n11" is added to the transforms -->
            <DigestMethod>
            <DigestValue>
      </Reference>
      (<Reference URI="#[generated_keyinfo_Id]">
            <Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
            <DigestMethod>
            <DigestValue>
      </Reference>)?
   </SignedInfo>
   <SignatureValue>
   (<KeyInfo Id="[generated_keyinfo_id]">)?
</Signature>)+
 

345.2. URI Format

The camel component consists of two endpoints which have the following URI format:

xmlsecurity:sign:name[?options]
xmlsecurity:verify:name[?options]
  • With the signer endpoint, you can generate a XML signature for the body of the in-message which can be either a XML document or a plain text. The enveloped, enveloping, or detached (as of 12.14)  XML signature(s) will be set to the body of the out-message.
  • With the verifier endpoint, you can validate an enveloped or enveloping XML signature or even several detached (as of 2.14.0) XML signatures contained in the body of the in-message; if the validation is successful, then the original content is extracted from the XML signature and set to the body of the out-message.
  • The name part in the URI can be chosen by the user to distinguish between different signer/verifier endpoints within the camel context.

345.3. Basic Example

The following example shows the basic usage of the component.

from("direct:enveloping").to("xmlsecurity:sign://enveloping?keyAccessor=#accessor",
                             "xmlsecurity:verify://enveloping?keySelector=#selector",
                             "mock:result")

In Spring XML:

<from uri="direct:enveloping" />
    <to uri="xmlsecurity:sign://enveloping?keyAccessor=#accessor" />
    <to uri="xmlsecurity:verify://enveloping?keySelector=#selector" />
<to uri="mock:result" />

For the signing process, a private key is necessary. You specify a key accessor bean which provides this private key. For the validation, the corresponding public key is necessary; you specify a key selector bean which provides this public key.

The key accessor bean must implement the KeyAccessor interface. The package org.apache.camel.component.xmlsecurity.api contains the default implementation class DefaultKeyAccessor which reads the private key from a Java keystore.

The key selector bean must implement the javax.xml.crypto.KeySelector interface. The package org.apache.camel.component.xmlsecurity.api contains the default implementation class DefaultKeySelector which reads the public key from a keystore.

In the example, the default signature algorithm http://www.w3.org/2000/09/xmldsig#rsa-sha1 is used. You can set the signature algorithm of your choice by the option signatureAlgorithm (see below). The signer endpoint creates an enveloping XML signature. If you want to create an enveloped XML signature then you must specify the parent element of the Signature element; see option parentLocalName for more details.

For creating detached XML signatures, see sub-chapter "Detached XML Signatures as Siblings of the Signed Elements".

345.4. Component Options

The XML Security component supports 3 options which are listed below.

NameDescriptionDefaultType

signerConfiguration (advanced)

To use a shared XmlSignerConfiguration configuration to use as base for configuring endpoints.

 

XmlSignerConfiguration

verifierConfiguration (advanced)

To use a shared XmlVerifierConfiguration configuration to use as base for configuring endpoints.

 

XmlVerifier Configuration

resolveProperty Placeholders (advanced)

Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders.

true

boolean

345.5. Endpoint Options

The XML Security endpoint is configured using URI syntax:

xmlsecurity:command:name

with the following path and query parameters:

345.5.1. Path Parameters (2 parameters):

NameDescriptionDefaultType

command

Required Whether to sign or verify.

 

XmlCommand

name

Required The name part in the URI can be chosen by the user to distinguish between different signer/verifier endpoints within the camel context.

 

String

345.5.2. Query Parameters (35 parameters):

NameDescriptionDefaultType

baseUri (common)

You can set a base URI which is used in the URI dereferencing. Relative URIs are then concatenated with the base URI.

 

String

clearHeaders (common)

Determines if the XML signature specific headers be cleared after signing and verification. Defaults to true.

true

Boolean

cryptoContextProperties (common)

Sets the crypto context properties. See link XMLCryptoContextsetProperty(String, Object). Possible properties are defined in XMLSignContext an XMLValidateContext (see Supported Properties). The following properties are set by default to the value link BooleanTRUE for the XML validation. If you want to switch these features off you must set the property value to link BooleanFALSE. org.jcp.xml.dsig.validateManifests javax.xml.crypto.dsig.cacheReference

 

Map

disallowDoctypeDecl (common)

Disallows that the incoming XML document contains DTD DOCTYPE declaration. The default value is link BooleanTRUE.

true

Boolean

omitXmlDeclaration (common)

Indicator whether the XML declaration in the outgoing message body should be omitted. Default value is false. Can be overwritten by the header link XmlSignatureConstantsHEADER_OMIT_XML_DECLARATION.

false

Boolean

outputXmlEncoding (common)

The character encoding of the resulting signed XML document. If null then the encoding of the original XML document is used.

 

String

schemaResourceUri (common)

Classpath to the XML Schema. Must be specified in the detached XML Signature case for determining the ID attributes, might be set in the enveloped and enveloping case. If set, then the XML document is validated with the specified XML schema. The schema resource URI can be overwritten by the header link XmlSignatureConstantsHEADER_SCHEMA_RESOURCE_URI.

 

String

synchronous (advanced)

Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported).

false

boolean

uriDereferencer (advanced)

If you want to restrict the remote access via reference URIs, you can set an own dereferencer. Optional parameter. If not set the provider default dereferencer is used which can resolve URI fragments, HTTP, file and XPpointer URIs. Attention: The implementation is provider dependent!

 

URIDereferencer

addKeyInfoReference (sign)

In order to protect the KeyInfo element from tampering you can add a reference to the signed info element so that it is protected via the signature value. The default value is true. Only relevant when a KeyInfo is returned by KeyAccessor. and link KeyInfogetId() is not null.

true

Boolean

canonicalizationMethod (sign)

Canonicalization method used to canonicalize the SignedInfo element before the digest is calculated. You can use the helper methods XmlSignatureHelper.getCanonicalizationMethod(String algorithm) or getCanonicalizationMethod(String algorithm, List inclusiveNamespacePrefixes) to create a canonicalization method.

http://www.w3.org/TR/2001/REC-xml-c14n-20010315

AlgorithmMethod

contentObjectId (sign)

Sets the content object Id attribute value. By default a UUID is generated. If you set the null value, then a new UUID will be generated. Only used in the enveloping case.

 

String

contentReferenceType (sign)

Type of the content reference. The default value is null. This value can be overwritten by the header link XmlSignatureConstantsHEADER_CONTENT_REFERENCE_TYPE.

 

String

contentReferenceUri (sign)

Reference URI for the content to be signed. Only used in the enveloped case. If the reference URI contains an ID attribute value, then the resource schema URI ( link setSchemaResourceUri(String)) must also be set because the schema validator will then find out which attributes are ID attributes. Will be ignored in the enveloping or detached case.

 

String

digestAlgorithm (sign)

Digest algorithm URI. Optional parameter. This digest algorithm is used for calculating the digest of the input message. If this digest algorithm is not specified then the digest algorithm is calculated from the signature algorithm. Example: http://www.w3.org/2001/04/xmlencsha256

 

String

keyAccessor (sign)

For the signing process, a private key is necessary. You specify a key accessor bean which provides this private key. The key accessor bean must implement the KeyAccessor interface. The package org.apache.camel.component.xmlsecurity.api contains the default implementation class DefaultKeyAccessor which reads the private key from a Java keystore.

 

KeyAccessor

parentLocalName (sign)

Local name of the parent element to which the XML signature element will be added. Only relevant for enveloped XML signature. Alternatively you can also use link setParentXpath(XPathFilterParameterSpec). Default value is null. The value must be null for enveloping and detached XML signature. This parameter or the parameter link setParentXpath(XPathFilterParameterSpec) for enveloped signature and the parameter link setXpathsToIdAttributes(List) for detached signature must not be set in the same configuration. If the parameters parentXpath and parentLocalName are specified in the same configuration then an exception is thrown.

 

String

parentNamespace (sign)

Namespace of the parent element to which the XML signature element will be added.

 

String

parentXpath (sign)

Sets the XPath to find the parent node in the enveloped case. Either you specify the parent node via this method or the local name and namespace of the parent with the methods link setParentLocalName(String) and link setParentNamespace(String). Default value is null. The value must be null for enveloping and detached XML signature. If the parameters parentXpath and parentLocalName are specified in the same configuration then an exception is thrown.

 

XPathFilterParameter Spec

plainText (sign)

Indicator whether the message body contains plain text. The default value is false, indicating that the message body contains XML. The value can be overwritten by the header link XmlSignatureConstantsHEADER_MESSAGE_IS_PLAIN_TEXT.

false

Boolean

plainTextEncoding (sign)

Encoding of the plain text. Only relevant if the message body is plain text (see parameter link plainText. Default value is UTF-8.

UTF-8

String

prefixForXmlSignature Namespace (sign)

Namespace prefix for the XML signature namespace http://www.w3.org/2000/09/xmldsig. Default value is ds. If null or an empty value is set then no prefix is used for the XML signature namespace. See best practice http://www.w3.org/TR/xmldsig-bestpractices/signing-xml- without-namespaces

ds

String

properties (sign)

For adding additional References and Objects to the XML signature which contain additional properties, you can provide a bean which implements the XmlSignatureProperties interface.

 

XmlSignatureProperties

signatureAlgorithm (sign)

Signature algorithm. Default value is http://www.w3.org/2000/09/xmldsigrsa-sha1.

http://www.w3.org/2000/09/xmldsig#rsa-sha1

String

signatureId (sign)

Sets the signature Id. If this parameter is not set (null value) then a unique ID is generated for the signature ID (default). If this parameter is set to (empty string) then no Id attribute is created in the signature element.

 

String

transformMethods (sign)

Transforms which are executed on the message body before the digest is calculated. By default, C14n is added and in the case of enveloped signature (see option parentLocalName) also http://www.w3.org/2000/09/xmldsigenveloped-signature is added at position 0 of the list. Use methods in XmlSignatureHelper to create the transform methods.

 

List

xpathsToIdAttributes (sign)

Define the elements which are signed in the detached case via XPATH expressions to ID attributes (attributes of type ID). For each element found via the XPATH expression a detached signature is created whose reference URI contains the corresponding attribute value (preceded by ''). The signature becomes the last sibling of the signed element. Elements with deeper hierarchy level are signed first. You can also set the XPATH list dynamically via the header link XmlSignatureConstantsHEADER_XPATHS_TO_ID_ATTRIBUTES. The parameter link setParentLocalName(String) or link setParentXpath(XPathFilterParameterSpec) for enveloped signature and this parameter for detached signature must not be set in the same configuration.

 

List

keySelector (verify)

Provides the key for validating the XML signature.

 

KeySelector

outputNodeSearch (verify)

Sets the output node search value for determining the node from the XML signature document which shall be set to the output message body. The class of the value depends on the type of the output node search. The output node search is forwarded to XmlSignature2Message.

 

String

outputNodeSearchType (verify)

Determines the search type for determining the output node which is serialized into the output message bodyF. See link setOutputNodeSearch(Object). The supported default search types you can find in DefaultXmlSignature2Message.

Default

String

removeSignatureElements (verify)

Indicator whether the XML signature elements (elements with local name Signature and namesapce http://www.w3.org/2000/09/xmldsig) shall be removed from the document set to the output message. Normally, this is only necessary, if the XML signature is enveloped. The default value is link BooleanFALSE. This parameter is forwarded to XmlSignature2Message. This indicator has no effect if the output node search is of type link DefaultXmlSignature2MessageOUTPUT_NODE_SEARCH_TYPE_DEFAULT.F

false

Boolean

secureValidation (verify)

Enables secure validation. If true then secure validation is enabled.

true

Boolean

validationFailedHandler (verify)

Handles the different validation failed situations. The default implementation throws specific exceptions for the different situations (All exceptions have the package name org.apache.camel.component.xmlsecurity.api and are a sub-class of XmlSignatureInvalidException. If the signature value validation fails, a XmlSignatureInvalidValueException is thrown. If a reference validation fails, a XmlSignatureInvalidContentHashException is thrown. For more detailed information, see the JavaDoc.

 

ValidationFailedHandler

xmlSignature2Message (verify)

Bean which maps the XML signature to the output-message after the validation. How this mapping should be done can be configured by the options outputNodeSearchType, outputNodeSearch, and removeSignatureElements. The default implementation offers three possibilities which are related to the three output node search types Default, ElementName, and XPath. The default implementation determines a node which is then serialized and set to the body of the output message If the search type is ElementName then the output node (which must be in this case an element) is determined by the local name and namespace defined in the search value (see option outputNodeSearch). If the search type is XPath then the output node is determined by the XPath specified in the search value (in this case the output node can be of type Element, TextNode or Document). If the output node search type is Default then the following rules apply: In the enveloped XML signature case (there is a reference with URI= and transform http://www.w3.org/2000/09/xmldsigenveloped-signature), the incoming XML document without the Signature element is set to the output message body. In the non-enveloped XML signature case, the message body is determined from a referenced Object; this is explained in more detail in chapter Output Node Determination in Enveloping XML Signature Case.

 

XmlSignature2Message

xmlSignatureChecker (verify)

This interface allows the application to check the XML signature before the validation is executed. This step is recommended in http://www.w3.org/TR/xmldsig-bestpractices/check-what-is-signed

 

XmlSignatureChecker

345.5.3. Output Node Determination in Enveloping XML Signature Case

After the validation the node is extracted from the XML signature document which is finally returned to the output-message body. In the enveloping XML signature case, the default implementation DefaultXmlSignature2Message of XmlSignature2Message does this for the node search type Default in the following way (see option xmlSignature2Message):

  • First an object reference is determined:

    • Only same document references are taken into account (URI must start with #)
    • Also indirect same document references to an object via manifest are taken into account.
    • The resulting number of object references must be 1.
  • Then, the object is dereferenced and the object must only contain one XML element. This element is returned as output node.

This does mean that the enveloping XML signature must have either the structure:

<Signature>
      <SignedInfo>
         <Reference URI="#object"/>
         <!-- further references possible but they must not point to an Object or Manifest containing an object reference -->
         ...
      </SignedInfo>

      <Object Id="object">
           <!-- contains one XML element which is extracted to the message body -->
      <Object>
      <!-- further object elements possible which are not referenced-->
      ...
      (<KeyInfo>)?
</Signature>

or the structure:

<Signature>
      <SignedInfo>
         <Reference URI="#manifest"/>
         <!-- further references  are possible but they must not point to an Object or other manifest containing an object reference -->
         ...
      </SignedInfo>

      <Object >
         <Manifest Id="manifest">
            <Reference URI=#object/>
         </Manifest>
      </Objet>
      <Object Id="object">
          <!-- contains the DOM node which is extracted to the message body -->
      </Object>
       <!-- further object elements possible which are not referenced -->
      ...
      (<KeyInfo>)?
</Signature>

345.6. Detached XML Signatures as Siblings of the Signed Elements

Since 2.14.0

You can create detached signatures where the signature is a sibling of the signed element. The following example contains two detached signatures. The first signature is for the element C and the second signature is for element A. The signatures are nested; the second signature is for the element A which also contains the first signature.

Example Detached XML Signatures

<?xml version="1.0" encoding="UTF-8" ?>
<root>
    <A ID="IDforA">
        <B>
            <C ID="IDforC">
                <D>dvalue</D>
            </C>
            <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
                Id="_6bf13099-0568-4d76-8649-faf5dcb313c0">
                <ds:SignedInfo>
                    <ds:CanonicalizationMethod
                        Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" />
                    <ds:SignatureMethod
                        Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />
                    <ds:Reference URI="#IDforC">
                        ...
                    </ds:Reference>
                </ds:SignedInfo>
                <ds:SignatureValue>aUDFmiG71</ds:SignatureValue>
            </ds:Signature>
        </B>
    </A>
    <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#"Id="_6b02fb8a-30df-42c6-ba25-76eba02c8214">
        <ds:SignedInfo>
            <ds:CanonicalizationMethod
                Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" />
            <ds:SignatureMethod
                Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />
            <ds:Reference URI="#IDforA">
                ...
            </ds:Reference>
        </ds:SignedInfo>
        <ds:SignatureValue>q3tvRoGgc8cMUqUSzP6C21zb7tt04riPnDuk=</ds:SignatureValue>
    </ds:Signature>
<root>

The example shows that you can sign several elements and that for each element a signature is created as sibling. The elements to be signed must have an attribute of type ID. The ID type of the attribute must be defined in the XML schema (see option schemaResourceUri). You specify a list of XPATH expressions pointing to attributes of type ID (see option xpathsToIdAttributes). These attributes determine the elements to be signed. The elements are signed by the same key given by the keyAccessor bean. Elements with higher (i.e. deeper) hierarchy level are signed first. In the example, the element C is signed before the element A.

Java DSL Example

from("direct:detached")
  .to("xmlsecurity:sign://detached?keyAccessor=#keyAccessorBeant&xpathsToIdAttributes=#xpathsToIdAttributesBean&schemaResourceUri=Test.xsd")
  .to("xmlsecurity:verify://detached?keySelector=#keySelectorBean&schemaResourceUri=org/apache/camel/component/xmlsecurity/Test.xsd")
  .to("mock:result");

Spring Example

   
<bean id="xpathsToIdAttributesBean" class="java.util.ArrayList">
      <constructor-arg type="java.util.Collection">
          <list>
              <bean
                  class="org.apache.camel.component.xmlsecurity.api.XmlSignatureHelper"
                  factory-method="getXpathFilter">
                  <constructor-arg type="java.lang.String"
                      value="/ns:root/a/@ID" />
                  <constructor-arg>
                      <map key-type="java.lang.String" value-type="java.lang.String">
                          <entry key="ns" value="http://test" />
                      </map>
                  </constructor-arg>
              </bean>
          </list>
      </constructor-arg>
  </bean>
...
 <from uri="direct:detached" />
      <to
          uri="xmlsecurity:sign://detached?keyAccessor=#keyAccessorBean&amp;xpathsToIdAttributes=#xpathsToIdAttributesBean&amp;schemaResourceUri=Test.xsd" />
      <to
          uri="xmlsecurity:verify://detached?keySelector=#keySelectorBean&amp;schemaResourceUri=Test.xsd" />
      <to uri="mock:result" />

345.7. XAdES-BES/EPES for the Signer Endpoint

Available as of Camel 2.15.0 

XML Advanced Electronic Signatures (XAdES) defines extensions to XML Signature. This standard was defined by the European Telecommunication Standards Institute and allows you to create signatures which are compliant to the European Union Directive (1999/93/EC) on a Community framework for electronic signatures. XAdES defines different sets of signature properties which are called signature forms. We support the signature forms Basic Electronic Signature (XAdES-BES) and Explicit Policy Based Electronic Signature (XAdES-EPES) for the Signer Endpoint. The forms Electronic Signature with Validation Data XAdES-T and XAdES-C are not supported.

We support the following properties of the XAdES-EPES form ("?" denotes zero or one occurrence):

Supported XAdES-EPES Properties

<QualifyingProperties Target>
    <SignedProperties>
        <SignedSignatureProperties>
            (SigningTime)?
            (SigningCertificate)?
            (SignaturePolicyIdentifier)
            (SignatureProductionPlace)?
            (SignerRole)?
        </SignedSignatureProperties>
        <SignedDataObjectProperties>
            (DataObjectFormat)?
            (CommitmentTypeIndication)?
        </SignedDataObjectProperties>
    </SignedProperties>
</QualifyingProperties>

The properties of the XAdES-BES form are the same except that the SignaturePolicyIdentifier property is not part of XAdES-BES. 

You can configure the XAdES-BES/EPES properties via the bean org.apache.camel.component.xmlsecurity.api.XAdESSignatureProperties or org.apache.camel.component.xmlsecurity.api.DefaultXAdESSignatureProperties. XAdESSignatureProperties does support all properties mentioned above except the SigningCertificate property. To get the SigningCertificate property, you must overwrite either the method XAdESSignatureProperties.getSigningCertificate() or XAdESSignatureProperties.getSigningCertificateChain(). The class DefaultXAdESSignatureProperties overwrites the method getSigningCertificate() and allows you to specify the signing certificate via a keystore and alias. The following example shows all parameters you can specify. If you do not need certain parameters you can just omit them.

XAdES-BES/EPES Example in Java DSL

 Keystore keystore = ... // load a keystore
DefaultKeyAccessor accessor = new DefaultKeyAccessor();
accessor.setKeyStore(keystore);
accessor.setPassword("password");
accessor.setAlias("cert_alias"); // signer key alias
 
DefaultXAdESSignatureProperties props = new DefaultXAdESSignatureProperties();
props.setNamespace("http://uri.etsi.org/01903/v1.3.2#"); // sets the namespace for the XAdES elements; the namspace is related to the XAdES version, default value is "http://uri.etsi.org/01903/v1.3.2#", other possible values are "http://uri.etsi.org/01903/v1.1.1#" and "http://uri.etsi.org/01903/v1.2.2#"
props.setPrefix("etsi"); // sets the prefix for the XAdES elements, default value is "etsi"
 
// signing certificate
props.setKeystore(keystore));
props.setAlias("cert_alias"); // specify the alias of the signing certificate in the keystore = signer key alias
props.setDigestAlgorithmForSigningCertificate(DigestMethod.SHA256); // possible values for the algorithm are "http://www.w3.org/2000/09/xmldsig#sha1", "http://www.w3.org/2001/04/xmlenc#sha256", "http://www.w3.org/2001/04/xmldsig-more#sha384", "http://www.w3.org/2001/04/xmlenc#sha512", default value is "http://www.w3.org/2001/04/xmlenc#sha256"
props.setSigningCertificateURIs(Collections.singletonList("http://certuri"));
 
// signing time
props.setAddSigningTime(true);
 
// policy
props.setSignaturePolicy(XAdESSignatureProperties.SIG_POLICY_EXPLICIT_ID);
// also the values XAdESSignatureProperties.SIG_POLICY_NONE ("None"), and XAdESSignatureProperties.SIG_POLICY_IMPLIED ("Implied")are possible, default value is XAdESSignatureProperties.SIG_POLICY_EXPLICIT_ID ("ExplicitId")
// For "None" and "Implied" you must not specify any further policy parameters
props.setSigPolicyId("urn:oid:1.2.840.113549.1.9.16.6.1");
props.setSigPolicyIdQualifier("OIDAsURN"); //allowed values are empty string, "OIDAsURI", "OIDAsURN"; default value is empty string
props.setSigPolicyIdDescription("invoice version 3.1");
props.setSignaturePolicyDigestAlgorithm(DigestMethod.SHA256);// possible values for the algorithm are "http://www.w3.org/2000/09/xmldsig#sha1", http://www.w3.org/2001/04/xmlenc#sha256", "http://www.w3.org/2001/04/xmldsig-more#sha384", "http://www.w3.org/2001/04/xmlenc#sha512", default value is http://www.w3.org/2001/04/xmlenc#sha256"
props.setSignaturePolicyDigestValue("Ohixl6upD6av8N7pEvDABhEL6hM=");
// you can add  qualifiers for the signature policy either by specifying text or an XML fragment with the root element "SigPolicyQualifier"
props.setSigPolicyQualifiers(Arrays
    .asList(new String[] {
        "<SigPolicyQualifier xmlns=\"http://uri.etsi.org/01903/v1.3.2#\"><SPURI>http://test.com/sig.policy.pdf</SPURI><SPUserNotice><ExplicitText>display text</ExplicitText>"
            + "</SPUserNotice></SigPolicyQualifier>", "category B" }));
props.setSigPolicyIdDocumentationReferences(Arrays.asList(new String[] {"http://test.com/policy.doc.ref1.txt",
    "http://test.com/policy.doc.ref2.txt" }));
 
// production place
props.setSignatureProductionPlaceCity("Munich");
props.setSignatureProductionPlaceCountryName("Germany");
props.setSignatureProductionPlacePostalCode("80331");
props.setSignatureProductionPlaceStateOrProvince("Bavaria");
 
//role
// you can add claimed roles either by specifying text or an XML fragment with the root element "ClaimedRole"
props.setSignerClaimedRoles(Arrays.asList(new String[] {"test",
    "<a:ClaimedRole xmlns:a=\"http://uri.etsi.org/01903/v1.3.2#\"><TestRole>TestRole</TestRole></a:ClaimedRole>" }));
props.setSignerCertifiedRoles(Collections.singletonList(new XAdESEncapsulatedPKIData("Ahixl6upD6av8N7pEvDABhEL6hM=",
    "http://uri.etsi.org/01903/v1.2.2#DER", "IdCertifiedRole")));
 
// data object format
props.setDataObjectFormatDescription("invoice");
props.setDataObjectFormatMimeType("text/xml");
props.setDataObjectFormatIdentifier("urn:oid:1.2.840.113549.1.9.16.6.2");
props.setDataObjectFormatIdentifierQualifier("OIDAsURN"); //allowed values are empty string, "OIDAsURI", "OIDAsURN"; default value is empty string
props.setDataObjectFormatIdentifierDescription("identifier desc");
props.setDataObjectFormatIdentifierDocumentationReferences(Arrays.asList(new String[] {
    "http://test.com/dataobject.format.doc.ref1.txt", "http://test.com/dataobject.format.doc.ref2.txt" }));
 
//commitment
props.setCommitmentTypeId("urn:oid:1.2.840.113549.1.9.16.6.4");
props.setCommitmentTypeIdQualifier("OIDAsURN"); //allowed values are empty string, "OIDAsURI", "OIDAsURN"; default value is empty string
props.setCommitmentTypeIdDescription("description for commitment type ID");
props.setCommitmentTypeIdDocumentationReferences(Arrays.asList(new String[] {"http://test.com/commitment.ref1.txt",
    "http://test.com/commitment.ref2.txt" }));
// you can specify a commitment type qualifier either by simple text or an XML fragment with root element "CommitmentTypeQualifier"
props.setCommitmentTypeQualifiers(Arrays.asList(new String[] {"commitment qualifier",
    "<c:CommitmentTypeQualifier xmlns:c=\"http://uri.etsi.org/01903/v1.3.2#\"><C>c</C></c:CommitmentTypeQualifier>" }));
 
beanRegistry.bind("xmlSignatureProperties",props);
beanRegistry.bind("keyAccessorDefault",keyAccessor);
 
// you must reference the properties bean in the "xmlsecurity" URI
from("direct:xades").to("xmlsecurity:sign://xades?keyAccessor=#keyAccessorDefault&properties=#xmlSignatureProperties")
             .to("mock:result");

XAdES-BES/EPES Example in Spring XML

...
<from uri="direct:xades" />
    <to
        uri="xmlsecurity:sign://xades?keyAccessor=#accessorRsa&amp;properties=#xadesProperties" />
    <to uri="mock:result" />
...
<bean id="xadesProperties"
    class="org.apache.camel.component.xmlsecurity.api.XAdESSignatureProperties">
    <!-- For more properties see the the previous Java DSL example. 
         If you want to have a signing certificate then use the bean class DefaultXAdESSignatureProperties (see the previous Java DSL example). -->
    <property name="signaturePolicy" value="ExplicitId" />
    <property name="sigPolicyId" value="http://www.test.com/policy.pdf" />
    <property name="sigPolicyIdDescription" value="factura" />
    <property name="signaturePolicyDigestAlgorithm" value="http://www.w3.org/2000/09/xmldsig#sha1" />
    <property name="signaturePolicyDigestValue" value="Ohixl6upD6av8N7pEvDABhEL1hM=" />
    <property name="signerClaimedRoles" ref="signerClaimedRoles_XMLSigner" />
    <property name="dataObjectFormatDescription" value="Factura electrónica" />
    <property name="dataObjectFormatMimeType" value="text/xml" />
</bean>
<bean class="java.util.ArrayList" id="signerClaimedRoles_XMLSigner">
    <constructor-arg>
        <list>
            <value>Emisor</value>
            <value>&lt;ClaimedRole
                xmlns=&quot;http://uri.etsi.org/01903/v1.3.2#&quot;&gt;&lt;test
                xmlns=&quot;http://test.com/&quot;&gt;test&lt;/test&gt;&lt;/ClaimedRole&gt;</value>
        </list>
    </constructor-arg>
</bean>

345.7.1. Headers

HeaderTypeDescription

CamelXmlSignatureXAdESQualifyingPropertiesId

String

for the 'Id' attribute value of QualifyingProperties element

CamelXmlSignatureXAdESSignedDataObjectPropertiesId

String

for the 'Id' attribute value of SignedDataObjectProperties element

CamelXmlSignatureXAdESSignedSignaturePropertiesId

String

for the 'Id' attribute value of SignedSignatureProperties element

CamelXmlSignatureXAdESDataObjectFormatEncoding

String

for the value of the Encoding element of the DataObjectFormat element

CamelXmlSignatureXAdESNamespace

String

 overwrites the XAdES namespace parameter value

CamelXmlSignatureXAdESPrefix

String

overwrites the XAdES prefix parameter value

345.7.2. Limitations with regard to XAdES version 1.4.2

  • No support for signature form XAdES-T and XAdES-C
  • Only signer part implemented. Verifier part currently not available.
  • No support for the QualifyingPropertiesReference element (see section 6.3.2 of spec).
  • No support for the Transforms element contained in the SignaturePolicyId element contained in the SignaturePolicyIdentifier element
  • No support of the CounterSignature element → no support for the UnsignedProperties element
  • At most one DataObjectFormat element. More than one DataObjectFormat element makes no sense because we have only one data object which is signed (this is the incoming message body to the XML signer endpoint).
  • At most one CommitmentTypeIndication element. More than one CommitmentTypeIndication element makes no sense  because we have only one data object which is signed (this is the incoming message body to the XML signer endpoint).
  • A CommitmentTypeIndication element contains always the AllSignedDataObjects element. The ObjectReference element within CommitmentTypeIndication element is not supported.
  • The AllDataObjectsTimeStamp element is not supported
  • The IndividualDataObjectsTimeStamp element is not supported

345.8. See Also