Package eu.europa.esig.dss.xades

Class DSSXMLUtils

java.lang.Object

eu.europa.esig.dss.xades.DSSXMLUtils

public final class DSSXMLUtils
extends Object

Utility class that contains some XML related method.

Field Summary

Fields

Modifier and Type	Field	Description
static final DSSNamespace	SAML_NAMESPACE	SAML namespace definition
static final String	SP_DOC_DIGEST_AS_IN_SPECIFICATION_ALGORITHM_URI	The SPDocDigestAsInSpecification transform algorithm URI for a custom SignaturePolicy processing
static final int	TRANSFORMER_INDENT_NUMBER	Value used to pretty print xades signature

Method Summary

Modifier and Type	Method	Description
static Node	alignChildrenIndents(Node parentNode)	Aligns indents for all children of the given node
static byte[]	applyTransforms(DSSDocument document, List<DSSTransform> transforms)	Applies transforms on document content and returns the byte array to be used for a digest computation NOTE: returns the original document binaries, if the list of transforms is empty.
static byte[]	applyTransforms(Node node, List<DSSTransform> transforms)	Applies transforms on the node and returns the byte array to be used for a digest computation NOTE: returns the original node binaries, if the list of transforms is empty
static boolean	containsTransforms(Element referenceElement)	This method checks if the reference element contain any transformation
static XAdESSignature	createCounterSignature(Element counterSignatureElement, XAdESSignature masterSignature)	Creates and returns a counter signature found in the counterSignatureElement
static Element	ensureNamespacesDefined(Document document, String elementId, String xpathString)	This method produces a copy of the document and returns an element by the defined xpathString.
static List<org.apache.xml.security.signature.Reference>	extractReferences(org.apache.xml.security.signature.Manifest manifest)	Extracts a list of References from the given Manifest object NOTE: can be used also for a SignedInfo element
static NodeList	getAllEncapsulatedTimestamps(Node documentNode)	Returns a NodeList of all "xades:EncapsulatedTimeStamp" elements found in the documentNode
static NodeList	getAllSignaturesExceptCounterSignatures(Node documentNode)	Returns a NodeList of all "ds:Signature" elements found in the documentNode
static String	getAttribute(Node node, String attributeName)	Returns attribute value for the given attribute name if exist, otherwise returns NULL
static Digest	getDigestAndValue(Element element)	This method extracts the Digest algorithm and value from an element of type DigestAlgAndValueType
static String	getDocumentName(org.apache.xml.security.signature.Reference reference)	This method returns a name of the linked document to the reference (when applicable)
static Document	getDocWithIndentedSignature(Document documentDom, String signatureId, List<String> noIndentObjectIds)	Pretty prints a signature in the given document
static String	getIDIdentifier(Node node)	If this method finds an attribute with the name ID (case-insensitive) then it is returned.
static Node	getIndentedNode(Node documentDom, Node xmlNode)	Returns an indented xmlNode
static PublicKey	getKeyInfoSigningCertificatePublicKey(Element signatureElement)	Extracts signing certificate's public key from KeyInfo element of a given signature if present NOTE: can return null (the value is optional)
static Element	getManifestById(Element signatureElement, String id)	Gets ds:Manifest by its Id from the ds:Signature element
static Element	getObjectById(Element signatureElement, String id)	Gets ds:Object by its Id from the ds:Signature element
static Digest	getReferenceDigest(org.apache.xml.security.signature.Reference reference)	Returns the Digest extracted from the provided reference
static DigestAlgorithm	getReferenceDigestAlgorithmOrDefault(XAdESSignatureParameters params)	Returns params.referenceDigestAlgorithm if exists, params.digestAlgorithm otherwise
static Set<DigestAlgorithm>	getReferenceDigestAlgos(Element referenceContainer)	Returns a list of DigestAlgorithm for all references containing inside the provided referenceContainer
static String	getReferenceId(org.apache.xml.security.signature.Reference reference)	This method retrieves an Id attribute value of the given reference, when applicable NOTE: Method is used due to Apache Santuario Signature returning an empty string instead of null result.
static NodeList	getReferenceNodeList(Node signatureElement)	Returns a NodeList of "ds:Reference" elements
static byte[]	getReferenceOriginalContentBytes(org.apache.xml.security.signature.Reference reference)	Returns bytes of the original referenced data
static ReferenceOutputType	getReferenceOutputType(DSSReference reference)	Returns the expected dereferencing output for the provided DSSReference
static ReferenceOutputType	getReferenceOutputType(org.apache.xml.security.signature.Reference reference)	Returns the expected dereferencing output for the provided Reference
static List<String>	getReferenceTypes(Element referenceContainer)	Returns a list of reference types
static String	getReferenceURI(org.apache.xml.security.signature.Reference reference)	This method retrieves a URI attribute value of the given reference, when applicable NOTE: Method is used due to Apache Santuario Signature returning an empty string instead of null result.
static void	incorporateDigestMethod(Element parentElement, DigestAlgorithm digestAlgorithm, DSSNamespace namespace)	This method creates the ds:DigestMethod DOM object
static void	incorporateDigestValue(Element parentDom, String base64EncodedDigestBytes, DSSNamespace namespace)	This method creates the ds:DigestValue DOM object.
static void	incorporateTransforms(Element parentElement, List<DSSTransform> transforms, DSSNamespace namespace)	Incorporates a ds:Transforms element into the given parent element
static Node	indentAndExtend(Document document, Node newNode, Node oldNode)	Extends the given oldNode by appending new indented childs from the given newNode
static Node	indentAndReplace(Document document, Node node)	Indents the given node and replaces it with a new one on the document
static org.apache.xml.security.signature.Manifest	initManifest(Element manifestElement)	Initializes a Manifest object from the provided ds:Manifest element
static void	initManifestDetachedContent(org.apache.xml.security.signature.Manifest manifest, List<DSSDocument> detachedContents)	Initializes detached content within the given manifest
static org.apache.xml.security.signature.Manifest	initManifestWithDetachedContent(Element manifestElement, List<DSSDocument> detachedContents)	Initializes a Manifest object from the provided ds:Manifest element with a provided detachedContents
static boolean	isAbleToDeReferenceContent(org.apache.xml.security.signature.Reference reference)	Checks if the original reference document content can be obtained (de-referenced)
static boolean	isCounterSignature(org.apache.xml.security.signature.Reference reference, XAdESPath xadesPaths)	Determines if the given reference refers to CounterSignature element
static boolean	isCounterSignatureReferenceType(String referenceType)	Checks if the given referenceType is an etsi Countersignature type
static boolean	isDuplicateIdsDetected(DSSDocument doc)	This method is used to detect duplicate id values
static boolean	isKeyInfoReference(org.apache.xml.security.signature.Reference reference, Element signature)	Checks if the given reference is linked to a KeyInfo element
static boolean	isManifestReferenceType(String referenceType)	Checks if the given referenceType is an xmldsig Manifest type
static boolean	isObjectReferenceType(String referenceType)	Checks if the given referenceType is an xmldsig Object type
static boolean	isReferencedContentAmbiguous(Document document, String uri)	Checks if the reference with the uri occurs multiple times in the document
static boolean	isSameDocumentReference(String referenceUri)	XMLDSIG 4.4.3.2 The Reference Processing Model A 'same-document' reference is defined as a URI-Reference that consists of a hash sign ('#') followed by a fragment or alternatively consists of an empty URI
static boolean	isSignaturePropertiesReference(org.apache.xml.security.signature.Reference reference, Element signature)	Checks if the given reference is linked to a SignatureProperties element or one of its SignatureProperty children
static boolean	isSignedProperties(org.apache.xml.security.signature.Reference reference, XAdESPath xadesPaths)	Determines if the given reference refers to SignedProperties element
static void	recursiveIdBrowse(Element element)	An ID attribute can only be dereferenced if it is declared in the validation context.
static boolean	registerTransform(String transformURI)	This method allows to register a transformation.
static boolean	registerTransformWithNodeSetOutput(String transformURI)	This method allows to register a transformation resulting to a node-set output.
static void	registerXAdESNamespaces()	Registers the XAdES namespaces
static void	setIDIdentifier(Element childElement)	If this method finds an attribute with names ID (case-insensitive) then declares it to be a user-determined ID attribute.
static List<String>	validateAgainstXSD(XSDAbstractUtils xsdUtils, Source source)	This method allows to validate an XML against the XAdES XSD schema.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

TRANSFORMER_INDENT_NUMBER

public static final int TRANSFORMER_INDENT_NUMBER

Value used to pretty print xades signature

See Also:

• Constant Field Values

SP_DOC_DIGEST_AS_IN_SPECIFICATION_ALGORITHM_URI

public static final String SP_DOC_DIGEST_AS_IN_SPECIFICATION_ALGORITHM_URI

The SPDocDigestAsInSpecification transform algorithm URI for a custom SignaturePolicy processing

See Also:

• Constant Field Values

SAML_NAMESPACE

public static final DSSNamespace SAML_NAMESPACE

SAML namespace definition

Method Details

registerXAdESNamespaces

public static void registerXAdESNamespaces()

Registers the XAdES namespaces

registerTransform

public static boolean registerTransform(String transformURI)

This method allows to register a transformation.

Parameters:

transformURI - the URI of transform

Returns:

true if this set did not already contain the specified element

registerTransformWithNodeSetOutput

public static boolean registerTransformWithNodeSetOutput(String transformURI)

This method allows to register a transformation resulting to a node-set output. See XMLDSIG for more information

Parameters:

transformURI - the URI of transform

Returns:

true if this set did not already contain the specified element

indentAndReplace

public static Node indentAndReplace(Document document,
 Node node)

Indents the given node and replaces it with a new one on the document

Parameters:

document - Document to indent the node in

node - Node to be indented

Returns:

the indented Node

indentAndExtend

public static Node indentAndExtend(Document document,
 Node newNode,
 Node oldNode)

Extends the given oldNode by appending new indented childs from the given newNode

Parameters:

document - owner Document of the node

newNode - new Node to indent

oldNode - old Node to extend with new indented elements

Returns:

the extended Node

getDocWithIndentedSignature

public static Document getDocWithIndentedSignature(Document documentDom,
 String signatureId,
 List<String> noIndentObjectIds)

Pretty prints a signature in the given document

Parameters:

documentDom - Document to pretty print

signatureId - String id of a ds:Signature element to be pretty-printed

noIndentObjectIds - String id of elements to not pretty-print

Returns:

Document with a pretty-printed signature

getIndentedNode

public static Node getIndentedNode(Node documentDom,
 Node xmlNode)

Returns an indented xmlNode

Parameters:

documentDom - is an owner Document of the xmlNode

xmlNode - Node to indent

Returns:

an indented Node xmlNode

alignChildrenIndents

public static Node alignChildrenIndents(Node parentNode)

Aligns indents for all children of the given node

Parameters:

parentNode - Node to align children into

Returns:

the given Node with aligned children

recursiveIdBrowse

public static void recursiveIdBrowse(Element element)

An ID attribute can only be dereferenced if it is declared in the validation context. This behaviour is caused by the fact that the attribute does not have attached type of information. Another solution is to parse the XML against some DTD or XML schema. This process adds the necessary type of information to each ID attribute.

Parameters:

element - Element

getIDIdentifier

public static String getIDIdentifier(Node node)

If this method finds an attribute with the name ID (case-insensitive) then it is returned. If there is more than one ID attributes then the first one is returned.

Parameters:

node - the node to be checked

Returns:

the ID attribute value or null

getAttribute

public static String getAttribute(Node node,
 String attributeName)

Returns attribute value for the given attribute name if exist, otherwise returns NULL

Parameters:

node - Node to get attribute value from

attributeName - String name of the attribute to get value for

Returns:

String value of the attribute

setIDIdentifier

public static void setIDIdentifier(Element childElement)

If this method finds an attribute with names ID (case-insensitive) then declares it to be a user-determined ID attribute.

Parameters:

childElement - Element

validateAgainstXSD

public static List<String> validateAgainstXSD(XSDAbstractUtils xsdUtils,
 Source source)

This method allows to validate an XML against the XAdES XSD schema.

Parameters:

xsdUtils - the XSD Utils class to be used

source - Source XML to validate

Returns:

an empty list if the XSD validates the XML, error messages otherwise

isDuplicateIdsDetected

public static boolean isDuplicateIdsDetected(DSSDocument doc)

This method is used to detect duplicate id values

Parameters:

doc - the document to be analyzed

Returns:

TRUE if a duplicate id is detected

getReferenceOriginalContentBytes

public static byte[] getReferenceOriginalContentBytes(org.apache.xml.security.signature.Reference reference)

Returns bytes of the original referenced data

Parameters:

reference - Reference to get bytes from

Returns:

byte array containing original data

getDigestAndValue

public static Digest getDigestAndValue(Element element)

This method extracts the Digest algorithm and value from an element of type DigestAlgAndValueType

Parameters:

element - an Element of type DigestAlgAndValueType

Returns:

an instance of Digest

containsTransforms

public static boolean containsTransforms(Element referenceElement)

This method checks if the reference element contain any transformation

Parameters:

referenceElement - the DOM element with the reference

Returns:

true if the reference contain any transform

isSignedProperties

public static boolean isSignedProperties(org.apache.xml.security.signature.Reference reference,
 XAdESPath xadesPaths)

Determines if the given reference refers to SignedProperties element

Parameters:

reference - Reference to check

xadesPaths - XAdESPath

Returns:

TRUE if the reference refers to the SignedProperties, FALSE otherwise

isCounterSignature

public static boolean isCounterSignature(org.apache.xml.security.signature.Reference reference,
 XAdESPath xadesPaths)

Determines if the given reference refers to CounterSignature element

Parameters:

reference - Reference to check

xadesPaths - XAdESPath

Returns:

TRUE if the reference refers to the CounterSignature, FALSE otherwise

isKeyInfoReference

public static boolean isKeyInfoReference(org.apache.xml.security.signature.Reference reference,
 Element signature)

Checks if the given reference is linked to a KeyInfo element

Parameters:

reference - the Reference to check

signature - the Element signature the given reference belongs to

Returns:

TRUE if the reference is a KeyInfo reference, FALSE otherwise

isSignaturePropertiesReference

public static boolean isSignaturePropertiesReference(org.apache.xml.security.signature.Reference reference,
 Element signature)

Checks if the given reference is linked to a SignatureProperties element or one of its SignatureProperty children

Parameters:

reference - the Reference to check

signature - the Element signature the given reference belongs to

Returns:

TRUE if the reference is a SignatureProperties reference, FALSE otherwise

isObjectReferenceType

public static boolean isObjectReferenceType(String referenceType)

Checks if the given referenceType is an xmldsig Object type

Parameters:

referenceType - String to check the type for

Returns:

TRUE if the provided referenceType is an Object type, FALSE otherwise

isManifestReferenceType

public static boolean isManifestReferenceType(String referenceType)

Checks if the given referenceType is an xmldsig Manifest type

Parameters:

referenceType - String to check the type for

Returns:

TRUE if the provided referenceType is a Manifest type, FALSE otherwise

isCounterSignatureReferenceType

public static boolean isCounterSignatureReferenceType(String referenceType)

Checks if the given referenceType is an etsi Countersignature type

Parameters:

referenceType - String to check the type for

Returns:

TRUE if the provided referenceType is a Countersignature type, FALSE otherwise

isSameDocumentReference

public static boolean isSameDocumentReference(String referenceUri)

XMLDSIG 4.4.3.2 The Reference Processing Model A 'same-document' reference is defined as a URI-Reference that consists of a hash sign ('#') followed by a fragment or alternatively consists of an empty URI

Parameters:

referenceUri - String uri of a reference to check

Returns:

TRUE is the URI points to a same-document, FALSE otherwise

getObjectById

public static Element getObjectById(Element signatureElement,
 String id)

Gets ds:Object by its Id from the ds:Signature element

Parameters:

signatureElement - Element the signature element to extract the signed ds:Object from

id - String object Id

Returns:

Element Object element

getManifestById

public static Element getManifestById(Element signatureElement,
 String id)

Gets ds:Manifest by its Id from the ds:Signature element

Parameters:

signatureElement - Element the signature element to extract the signed ds:Manifest from

id - String manifest Id

Returns:

Element Manifest element

initManifest

public static org.apache.xml.security.signature.Manifest initManifest(Element manifestElement)
                                                               throws org.apache.xml.security.exceptions.XMLSecurityException

Initializes a Manifest object from the provided ds:Manifest element

Parameters:

manifestElement - Element ds:Manifest element

Returns:

Manifest object

Throws:

org.apache.xml.security.exceptions.XMLSecurityException - if en error occurs in an attempt to initialize the Manifest object

initManifestWithDetachedContent

public static org.apache.xml.security.signature.Manifest initManifestWithDetachedContent(Element manifestElement,
 List<DSSDocument> detachedContents)
                                                                                  throws org.apache.xml.security.exceptions.XMLSecurityException

Initializes a Manifest object from the provided ds:Manifest element with a provided detachedContents

Parameters:

manifestElement - Element ds:Manifest element

detachedContents - a list of DSSDocuments representing a detached content

Returns:

Manifest object

Throws:

org.apache.xml.security.exceptions.XMLSecurityException - if en error occurs in an attempt to initialize the Manifest object

initManifestDetachedContent

public static void initManifestDetachedContent(org.apache.xml.security.signature.Manifest manifest,
 List<DSSDocument> detachedContents)

Initializes detached content within the given manifest

Parameters:

manifest - Manifest to initialize detached content in

detachedContents - a list of DSSDocuments

getKeyInfoSigningCertificatePublicKey

public static PublicKey getKeyInfoSigningCertificatePublicKey(Element signatureElement)

Extracts signing certificate's public key from KeyInfo element of a given signature if present NOTE: can return null (the value is optional)

Parameters:

signatureElement - Element representing a signature to get KeyInfo signing certificate for

Returns:

PublicKey of the signature extracted from KeyInfo element if present

createCounterSignature

public static XAdESSignature createCounterSignature(Element counterSignatureElement,
 XAdESSignature masterSignature)

Creates and returns a counter signature found in the counterSignatureElement

Parameters:

counterSignatureElement - Element <ds:CounterSignature> element

masterSignature - XAdESSignature master signature containing the counter signature

Returns:

XAdESSignature

getAllSignaturesExceptCounterSignatures

public static NodeList getAllSignaturesExceptCounterSignatures(Node documentNode)

Returns a NodeList of all "ds:Signature" elements found in the documentNode

Parameters:

documentNode - Node the XML document or its part

Returns:

NodeList

getAllEncapsulatedTimestamps

public static NodeList getAllEncapsulatedTimestamps(Node documentNode)

Returns a NodeList of all "xades:EncapsulatedTimeStamp" elements found in the documentNode

Parameters:

documentNode - Node the XML document or its part

Returns:

NodeList

getReferenceNodeList

public static NodeList getReferenceNodeList(Node signatureElement)

Returns a NodeList of "ds:Reference" elements

Parameters:

signatureElement - Node representing a ds:Signature node

Returns:

NodeList

getReferenceOutputType

public static ReferenceOutputType getReferenceOutputType(DSSReference reference)

Returns the expected dereferencing output for the provided DSSReference

Parameters:

reference - DSSReference to get OutputType for

Returns:

ReferenceOutputType

getReferenceOutputType

public static ReferenceOutputType getReferenceOutputType(org.apache.xml.security.signature.Reference reference)
                                                  throws org.apache.xml.security.exceptions.XMLSecurityException

Returns the expected dereferencing output for the provided Reference

Parameters:

reference - Reference to get OutputType for

Returns:

ReferenceOutputType

Throws:

org.apache.xml.security.exceptions.XMLSecurityException - if an exception occurs

applyTransforms

public static byte[] applyTransforms(Node node,
 List<DSSTransform> transforms)

Applies transforms on the node and returns the byte array to be used for a digest computation NOTE: returns the original node binaries, if the list of transforms is empty

Parameters:

node - Node to apply transforms on

transforms - a list of DSSTransforms to execute on the node

Returns:

a byte array, representing a content obtained after transformations

applyTransforms

public static byte[] applyTransforms(DSSDocument document,
 List<DSSTransform> transforms)

Applies transforms on document content and returns the byte array to be used for a digest computation NOTE: returns the original document binaries, if the list of transforms is empty. The document shall represent an XML content.

Parameters:

document - DSSDocument representing an XML to apply transforms on

transforms - a list of DSSTransforms to execute on the node

Returns:

a byte array, representing a content obtained after transformations

getReferenceDigestAlgos

public static Set<DigestAlgorithm> getReferenceDigestAlgos(Element referenceContainer)

Returns a list of DigestAlgorithm for all references containing inside the provided referenceContainer

Parameters:

referenceContainer - Element containing the ds:Reference elements

Returns:

a set of DigestAlgorithms

getReferenceTypes

public static List<String> getReferenceTypes(Element referenceContainer)

Returns a list of reference types

Parameters:

referenceContainer - Element containing the ds:Reference elements

Returns:

a list of String reference types

extractReferences

public static List<org.apache.xml.security.signature.Reference> extractReferences(org.apache.xml.security.signature.Manifest manifest)

Extracts a list of References from the given Manifest object NOTE: can be used also for a SignedInfo element

Parameters:

manifest - Manifest

Returns:

a list of References

getReferenceDigest

public static Digest getReferenceDigest(org.apache.xml.security.signature.Reference reference)

Returns the Digest extracted from the provided reference

Parameters:

reference - Reference

Returns:

Digest

getReferenceId

public static String getReferenceId(org.apache.xml.security.signature.Reference reference)

This method retrieves an Id attribute value of the given reference, when applicable NOTE: Method is used due to Apache Santuario Signature returning an empty string instead of null result.

Parameters:

reference - Reference to get value of Id attribute

Returns:

String Id attribute value if available, NULL otherwise

getReferenceURI

public static String getReferenceURI(org.apache.xml.security.signature.Reference reference)

This method retrieves a URI attribute value of the given reference, when applicable NOTE: Method is used due to Apache Santuario Signature returning an empty string instead of null result.

Parameters:

reference - Reference to get value of URI attribute

Returns:

String URI attribute value if available, NULL otherwise

isAbleToDeReferenceContent

public static boolean isAbleToDeReferenceContent(org.apache.xml.security.signature.Reference reference)

Checks if the original reference document content can be obtained (de-referenced)

Parameters:

reference - Reference to check

Returns:

TRUE if the de-referencing is succeeding, FALSE otherwise

isReferencedContentAmbiguous

public static boolean isReferencedContentAmbiguous(Document document,
 String uri)

Checks if the reference with the uri occurs multiple times in the document

Parameters:

document - Document to be checked for a wrapping attack

uri - String the referenced uri to be verified

Returns:

TRUE if the reference is ambiguous (duplicated), FALSE otherwise

incorporateTransforms

public static void incorporateTransforms(Element parentElement,
 List<DSSTransform> transforms,
 DSSNamespace namespace)

Incorporates a ds:Transforms element into the given parent element

Parameters:

parentElement - Element to incorporate ds:Transforms into

transforms - a list of DSSTransforms to be incorporated

namespace - DSSNamespace to use

incorporateDigestMethod

public static void incorporateDigestMethod(Element parentElement,
 DigestAlgorithm digestAlgorithm,
 DSSNamespace namespace)

This method creates the ds:DigestMethod DOM object

 
 		<ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
 
 

Parameters:

parentElement - Elementthe parent element

digestAlgorithm - DigestAlgorithm the digest algorithm

namespace - DSSNamespace to use

incorporateDigestValue

public static void incorporateDigestValue(Element parentDom,
 String base64EncodedDigestBytes,
 DSSNamespace namespace)

This method creates the ds:DigestValue DOM object.

 
 		<ds:DigestValue>fj8SJujSXU4fi342bdtiKVbglA0=</ds:DigestValue>
 
 

Parameters:

parentDom - Element the parent element

base64EncodedDigestBytes - String representing a base64-encoded Digest value

namespace - DSSNamespace

getReferenceDigestAlgorithmOrDefault

public static DigestAlgorithm getReferenceDigestAlgorithmOrDefault(XAdESSignatureParameters params)

Returns params.referenceDigestAlgorithm if exists, params.digestAlgorithm otherwise

Parameters:

params - XAdESSignatureParameters

Returns:

DigestAlgorithm

ensureNamespacesDefined

public static Element ensureNamespacesDefined(Document document,
 String elementId,
 String xpathString)

This method produces a copy of the document and returns an element by the defined xpathString. This method can be used as a workaround for canonicalization, as namespaces are not added to canonicalizer for new created elements. The issue was reported on: SANTUARIO-139

Parameters:

document - Document

elementId - String optional element Id to start XPath expression from

xpathString - String corresponding to an XPath of element to be returned

Returns:

Element

getDocumentName

public static String getDocumentName(org.apache.xml.security.signature.Reference reference)

This method returns a name of the linked document to the reference (when applicable)

Parameters:

reference - Reference to get a name of the linked document for

Returns:

String document name