Module java.xml.crypto

Package javax.xml.crypto.dsig.keyinfo

Interface KeyInfo

All Superinterfaces:

XMLStructure

public interface KeyInfo
extends XMLStructure

A representation of the XML KeyInfo element as defined in the W3C Recommendation for XML-Signature Syntax and Processing. A KeyInfo contains a list of XMLStructures, each of which contain information that enables the recipient(s) to obtain the key needed to validate an XML signature. The XML Schema Definition is defined as:

 <element name="KeyInfo" type="ds:KeyInfoType"/>
 <complexType name="KeyInfoType" mixed="true">
   <choice maxOccurs="unbounded">
     <element ref="ds:KeyName"/>
     <element ref="ds:KeyValue"/>
     <element ref="ds:RetrievalMethod"/>
     <element ref="ds:X509Data"/>
     <element ref="ds:PGPData"/>
     <element ref="ds:SPKIData"/>
     <element ref="ds:MgmtData"/>
     <any processContents="lax" namespace="##other"/>
     <!-- (1,1) elements from (0,unbounded) namespaces -->
   </choice>
   <attribute name="Id" type="ID" use="optional"/>
 </complexType>
 

A KeyInfo instance may be created by invoking one of the newKeyInfo methods of the KeyInfoFactory class, and passing it a list of one or more XMLStructures and an optional id parameter; for example:

   KeyInfoFactory factory = KeyInfoFactory.getInstance("DOM");
   KeyInfo keyInfo = factory.newKeyInfo
      (Collections.singletonList(factory.newKeyName("Alice"), "keyinfo-1"));
 

KeyInfo objects can also be marshalled to XML by invoking the marshal method.

Since:

1.6

See Also:

• KeyInfoFactory.newKeyInfo(List)
• KeyInfoFactory.newKeyInfo(List, String)

Method Summary

Modifier and Type	Method	Description
List<XMLStructure>	getContent()	Returns an unmodifiable list containing the key information.
String	getId()	Return the optional Id attribute of this KeyInfo, which may be useful for referencing this KeyInfo from other XML structures.
void	marshal(XMLStructure parent, XMLCryptoContext context)	Marshals the key info to XML.

Methods declared in interface javax.xml.crypto.XMLStructure

isFeatureSupported

Method Details

getContent

List<XMLStructure> getContent()

Returns an unmodifiable list containing the key information. Each entry of the list is an XMLStructure.

If there is a public subclass representing the type of XMLStructure, it is returned as an instance of that class (ex: an X509Data element would be returned as an instance of X509Data).

Returns:

an unmodifiable list of one or more XMLStructures in this KeyInfo. Never returns null or an empty list.

getId

String getId()

Return the optional Id attribute of this KeyInfo, which may be useful for referencing this KeyInfo from other XML structures.

Returns:

the Id attribute of this KeyInfo (may be null if not specified)

marshal

void marshal(XMLStructure parent,
 XMLCryptoContext context)
      throws MarshalException

Marshals the key info to XML.

Parameters:

parent - a mechanism-specific structure containing the parent node that the marshalled key info will be appended to

context - the XMLCryptoContext containing additional context (may be null if not applicable)

Throws:

ClassCastException - if the type of parent or context is not compatible with this key info

MarshalException - if the key info cannot be marshalled

NullPointerException - if parent is null