+ * Encrypts an object to a single recipient using this object as a container.
+ *
+ * @param xmlObject object to encrypt
+ * @param metadataProvider a locked MetadataProvider to supply encryption keys
+ * @param criteria metadata-based CredentialCriteria to use
+ * @param compact true iff compact KeyInfo should be used
+ * @param algorithm optionally specifies data encryption algorithm if none can be determined from metadata
+ * @return the encrypted object
+ */
+ virtual void encrypt(
+ const EncryptableObject& xmlObject,
+ const saml2md::MetadataProvider& metadataProvider,
+ saml2md::MetadataCredentialCriteria& criteria,
+ bool compact=false,
+ const XMLCh* algorithm=NULL
+ );
+
+ /**
+ * Encrypts an object to multiple recipients using this object as a container.
+ *
+ * @param xmlObject object to encrypt
+ * @param recipients pairs containing a locked MetadataProvider to supply encryption keys,
+ * and a metadata-based CredentialCriteria to use
+ * @param compact true iff compact KeyInfo should be used
+ * @param algorithm optionally specifies data encryption algorithm if none can be determined from metadata
+ * @return the encrypted object
+ */
+ virtual void encrypt(
+ const EncryptableObject& xmlObject,
+ const std::vector< std::pair<const saml2md::MetadataProvider*, saml2md::MetadataCredentialCriteria*> >& recipients,
+ bool compact=false,
+ const XMLCh* algorithm=NULL
+ );
+
+ /**