A representation of the XML KeyValue element as defined in the W3C Recommendation for XML-Signature Syntax and Processing.

  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.