A representation of the XML 
KeyValue element as defined
 in the 
 W3C Recommendation for XML-Signature Syntax and Processing. A
 
KeyValue object contains a single public key that may be
 useful in validating the signature. The XML schema definition is defined as:
 
    <element name="KeyValue" type="ds:KeyValueType"/>
    <complexType name="KeyValueType" mixed="true">
      <choice>
        <element ref="ds:DSAKeyValue"/>
        <element ref="ds:RSAKeyValue"/>
        <any namespace="##other" processContents="lax"/>
      </choice>
    </complexType>
    <element name="DSAKeyValue" type="ds:DSAKeyValueType"/>
    <complexType name="DSAKeyValueType">
      <sequence>
        <sequence minOccurs="0">
          <element name="P" type="ds:CryptoBinary"/>
          <element name="Q" type="ds:CryptoBinary"/>
        </sequence>
        <element name="G" type="ds:CryptoBinary" minOccurs="0"/>
        <element name="Y" type="ds:CryptoBinary"/>
        <element name="J" type="ds:CryptoBinary" minOccurs="0"/>
        <sequence minOccurs="0">
          <element name="Seed" type="ds:CryptoBinary"/>
          <element name="PgenCounter" type="ds:CryptoBinary"/>
        </sequence>
      </sequence>
    </complexType>
    <element name="RSAKeyValue" type="ds:RSAKeyValueType"/>
    <complexType name="RSAKeyValueType">
      <sequence>
        <element name="Modulus" type="ds:CryptoBinary"/>
        <element name="Exponent" type="ds:CryptoBinary"/>
      </sequence>
    </complexType>
 
 A 
KeyValue instance may be created by invoking the
 
newKeyValue method of the
 
KeyInfoFactory class, and passing it a 
PublicKey representing the value of the public key. Here is
 an example of creating a 
KeyValue from a 
DSAPublicKey
 of a 
Certificate stored in a
 
KeyStore:
 
 KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
 PublicKey dsaPublicKey = keyStore.getCertificate("myDSASigningCert").getPublicKey();
 KeyInfoFactory factory = KeyInfoFactory.getInstance("DOM");
 KeyValue keyValue = factory.newKeyValue(dsaPublicKey);
 
 This class returns the 
DSAKeyValue and
 
RSAKeyValue elements as objects of type
 
DSAPublicKey and 
RSAPublicKey, respectively. Note that not
 all of the fields in the schema are accessible as parameters of these
 types.