/* $Id$
 *
 * Lasso - A free implementation of the Liberty Alliance specifications.
 *
 * Copyright (C) 2004-2007 Entr'ouvert
 * http://lasso.entrouvert.org
 *
 * Authors: See AUTHORS file in top-level directory.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

/**
 * SECTION:name_registration
 * @short_description: Name Registration Profile (ID-FF)
 *
 **/

#include "../xml/private.h"
#include "name_registration.h"
#include "profileprivate.h"
#include "providerprivate.h"
#include "../utils.h"

/*****************************************************************************/
/* public methods                                                            */
/*****************************************************************************/

/**
 * lasso_name_registration_build_request_msg:
 * @name_registration: a #LassoNameRegistration
 *
 * Builds a register name identifier request message.
 *
 * It gets the register name identifier protocol profile and:
 * <itemizedlist>
 * <listitem><para>
 *   if it is a SOAP method, then it builds the register name identifier
 *   request SOAP message, optionally signs his node, sets @msg_body,
 *   gets the SoapEndpoint url and sets @msg_url.
 * </para></listitem>
 * <listitem><para>
 *   if it is a HTTP-Redirect method, then it builds the register name
 *   identifier request QUERY message (optionally signs the request message),
 *   builds the request url with register name identifier url with register
 *   name identifier service url, sets @msg_url in the register name
 *   identifier object, sets @msg_body to NULL.
 * </para></listitem>
 * </itemizedlist>
 *
 * Return value: 0 on success; or a negative value otherwise.
 **/
gint
lasso_name_registration_build_request_msg(LassoNameRegistration *name_registration)
{
	LassoProfile *profile;
	LassoProvider *remote_provider;
	char *url, *query;

	g_return_val_if_fail(LASSO_IS_NAME_REGISTRATION(name_registration),
			LASSO_PARAM_ERROR_INVALID_VALUE);

	profile = LASSO_PROFILE(name_registration);
	lasso_profile_clean_msg_info(profile);

	if (profile->remote_providerID == NULL) {
		/* this means lasso_logout_init_request was not called before */
		return critical_error(LASSO_PROFILE_ERROR_MISSING_REMOTE_PROVIDERID);
	}

	remote_provider = lasso_server_get_provider(profile->server, profile->remote_providerID);
	if (LASSO_IS_PROVIDER(remote_provider) == FALSE) {
		return critical_error(LASSO_SERVER_ERROR_PROVIDER_NOT_FOUND);
	}

	if (profile->http_request_method == LASSO_HTTP_METHOD_SOAP) {
		profile->msg_url = lasso_provider_get_metadata_one(
				remote_provider, "SoapEndpoint");
		LASSO_SAMLP_REQUEST_ABSTRACT(profile->request)->private_key_file =
			profile->server->private_key;
		LASSO_SAMLP_REQUEST_ABSTRACT(profile->request)->certificate_file =
			profile->server->certificate;
		profile->msg_body = lasso_node_export_to_soap(profile->request);
		return 0;
	}

	if (profile->http_request_method == LASSO_HTTP_METHOD_REDIRECT) {
		/* build and optionally sign the query message and build the
		 * register name identifier request url */
		url = lasso_provider_get_metadata_one(remote_provider,
				"RegisterNameIdentifierServiceURL");
		if (url == NULL) {
			return critical_error(LASSO_PROFILE_ERROR_UNKNOWN_PROFILE_URL);
		}
		query = lasso_node_export_to_query_with_password(LASSO_NODE(profile->request),
				profile->server->signature_method,
				profile->server->private_key,
				profile->server->private_key_password);
		if (query == NULL) {
			lasso_release(url);
			return critical_error(LASSO_PROFILE_ERROR_BUILDING_QUERY_FAILED);
		}
		/* build the msg_url */
		profile->msg_url = lasso_concat_url_query(url, query);
		profile->msg_body = NULL;
		lasso_release(url);
		lasso_release(query);
		return 0;
	}

	return critical_error(LASSO_PROFILE_ERROR_INVALID_HTTP_METHOD);
}


/**
 * lasso_name_registration_build_response_msg:
 * @name_registration: a #LassoNameRegistration
 *
 * Builds the register name idendifier response message.
 *
 * It gets the request message method and:
 * <itemizedlist>
 * <listitem><para>
 *    if it is a SOAP method, then it builds the response SOAP message, sets
 *    the msg_body attribute, gets the register name identifier service return
 *    url and sets @msg_url of the object.
 * </para></listitem>
 * <listitem><para>
 *    if it is a HTTP-Redirect method, then it builds the response QUERY
 *    message, builds the response url, sets @msg_url with the response url
 *    and sets the msg_body with NULL
 * </para></listitem>
 * </itemizedlist>
 *
 * If private key and certificate are set in server object it will also signs
 * the message (either with X509 if SOAP or with a simple signature for query
 * strings).
 *
 * Return value: 0 on success; or a negative value otherwise.
 **/
gint
lasso_name_registration_build_response_msg(LassoNameRegistration *name_registration)
{
	LassoProfile *profile;
	LassoProvider *remote_provider;
	char *url, *query;

	g_return_val_if_fail(LASSO_IS_NAME_REGISTRATION(name_registration),
			LASSO_PARAM_ERROR_INVALID_VALUE);

	profile = LASSO_PROFILE(name_registration);
	lasso_profile_clean_msg_info(profile);

	if (profile->remote_providerID == NULL) {
		/* this means lasso_logout_init_request was not called before */
		return critical_error(LASSO_PROFILE_ERROR_MISSING_REMOTE_PROVIDERID);
	}

	remote_provider = lasso_server_get_provider(profile->server, profile->remote_providerID);
	if (LASSO_IS_PROVIDER(remote_provider) == FALSE) {
		return critical_error(LASSO_SERVER_ERROR_PROVIDER_NOT_FOUND);
	}

	if (profile->http_request_method == LASSO_HTTP_METHOD_SOAP) {
		profile->msg_url = NULL;
		LASSO_SAMLP_RESPONSE_ABSTRACT(profile->response)->private_key_file =
			profile->server->private_key;
		LASSO_SAMLP_RESPONSE_ABSTRACT(profile->response)->certificate_file =
			profile->server->certificate;
		profile->msg_body = lasso_node_export_to_soap(profile->response);
		return 0;
	}

	if (profile->http_request_method == LASSO_HTTP_METHOD_REDIRECT) {
		url = lasso_provider_get_metadata_one(remote_provider,
				"RegisterNameIdentifierServiceReturnURL");
		if (url == NULL) {
			return critical_error(LASSO_PROFILE_ERROR_UNKNOWN_PROFILE_URL);
		}
		query = lasso_node_export_to_query_with_password(LASSO_NODE(profile->response),
				profile->server->signature_method,
				profile->server->private_key,
				profile->server->private_key_password);
		if (query == NULL) {
			lasso_release(url);
			return critical_error(LASSO_PROFILE_ERROR_BUILDING_QUERY_FAILED);
		}
		/* build the msg_url */
		profile->msg_url = lasso_concat_url_query(url, query);
		lasso_release(url);
		lasso_release(query);
		profile->msg_body = NULL;

		return 0;
	}

	return critical_error(LASSO_PROFILE_ERROR_INVALID_HTTP_METHOD);
}

/**
 * lasso_name_registration_destroy:
 * @name_registration: a #LassoNameRegistration
 *
 * Destroys a #LassoNameRegistration object.
 **/
void
lasso_name_registration_destroy(LassoNameRegistration *name_registration)
{
	lasso_node_destroy(LASSO_NODE(name_registration));
}


/**
 * lasso_name_registration_init_request:
 * @name_registration: a #LassoNameRegistration
 * @remote_providerID: the providerID of the identity provider.
 * @http_method: if set, then it get the protocol profile in metadata
 *     corresponding of this HTTP request method.
 *
 * Initializes a new lib:RegisterNameIdentifierRequest request; it sets
 * @name_registration->nameIdentifier to the new name identifier and
 * @name_registration->oldNameIdentifier to the old one.
 *
 * Return value: 0 on success; or a negative value otherwise.
 **/
gint
lasso_name_registration_init_request(LassoNameRegistration *name_registration,
		char *remote_providerID, LassoHttpMethod http_method)
{
	LassoProfile *profile;
	LassoProvider *remote_provider;
	LassoFederation *federation;
	LassoSamlNameIdentifier *spNameIdentifier, *idpNameIdentifier, *oldNameIdentifier = NULL;

	g_return_val_if_fail(LASSO_IS_NAME_REGISTRATION(name_registration),
			LASSO_PARAM_ERROR_INVALID_VALUE);
	g_return_val_if_fail(remote_providerID != NULL, LASSO_PARAM_ERROR_INVALID_VALUE);

	profile = LASSO_PROFILE(name_registration);

	/* verify if the identity and session exist */
	if (LASSO_IS_IDENTITY(profile->identity) == FALSE) {
		return critical_error(LASSO_PROFILE_ERROR_IDENTITY_NOT_FOUND);
	}

	/* set the remote provider id */
	profile->remote_providerID = g_strdup(remote_providerID);

	remote_provider = lasso_server_get_provider(profile->server, profile->remote_providerID);
	if (LASSO_IS_PROVIDER(remote_provider) == FALSE) {
		return critical_error(LASSO_SERVER_ERROR_PROVIDER_NOT_FOUND);
	}

	/* Get federation */
	federation = g_hash_table_lookup(profile->identity->federations,
			profile->remote_providerID);
	if (LASSO_IS_FEDERATION(federation) == FALSE) {
		return critical_error(LASSO_PROFILE_ERROR_FEDERATION_NOT_FOUND);
	}

	/* FIXME : depending on the requester provider type, verify the format
	 * of the old name identifier is only federated type */

	if (remote_provider->role == LASSO_PROVIDER_ROLE_IDP) {
		/* Initiating it, from a SP */
		spNameIdentifier = lasso_saml_name_identifier_new();
		spNameIdentifier->content = lasso_build_unique_id(32);
		spNameIdentifier->NameQualifier = g_strdup(profile->remote_providerID);
		spNameIdentifier->Format = g_strdup(LASSO_LIB_NAME_IDENTIFIER_FORMAT_FEDERATED);

		idpNameIdentifier = LASSO_SAML_NAME_IDENTIFIER(g_object_ref(federation->remote_nameIdentifier));

		if (federation->local_nameIdentifier) {
			/* old name identifier is from SP,
			 * name_registration->oldNameIdentifier must be from SP */
			oldNameIdentifier = LASSO_SAML_NAME_IDENTIFIER(g_object_ref(federation->local_nameIdentifier));
		} else {
			/* oldNameIdentifier is none, no local name identifier at SP, old is IDP */
			oldNameIdentifier = LASSO_SAML_NAME_IDENTIFIER(g_object_ref(idpNameIdentifier));
		}

		profile->nameIdentifier = LASSO_NODE(g_object_ref(spNameIdentifier));
		name_registration->oldNameIdentifier = g_object_ref(oldNameIdentifier);
	} else { /* if (remote_provider->role == LASSO_PROVIDER_ROLE_SP) { */
		/* Initiating it, from an IdP */
		if (federation->local_nameIdentifier == NULL) {
			return LASSO_PROFILE_ERROR_NAME_IDENTIFIER_NOT_FOUND;
		}

		oldNameIdentifier = LASSO_SAML_NAME_IDENTIFIER(g_object_ref(federation->local_nameIdentifier));

		spNameIdentifier = NULL;
		if (federation->remote_nameIdentifier) {
			spNameIdentifier = LASSO_SAML_NAME_IDENTIFIER(g_object_ref(federation->remote_nameIdentifier));
		}

		idpNameIdentifier = lasso_saml_name_identifier_new();
		idpNameIdentifier->content = lasso_build_unique_id(32);
		idpNameIdentifier->NameQualifier = g_strdup(profile->remote_providerID);
		idpNameIdentifier->Format = g_strdup(LASSO_LIB_NAME_IDENTIFIER_FORMAT_FEDERATED);

		profile->nameIdentifier = LASSO_NODE(g_object_ref(idpNameIdentifier));
		name_registration->oldNameIdentifier = g_object_ref(oldNameIdentifier);
	}

	if (oldNameIdentifier == NULL) {
		message(G_LOG_LEVEL_CRITICAL, "Invalid provider type"); /* ??? */
		return LASSO_PROFILE_ERROR_MISSING_NAME_IDENTIFIER;
	}

	if (http_method == LASSO_HTTP_METHOD_ANY) {
		http_method = lasso_provider_get_first_http_method(
				LASSO_PROVIDER(profile->server),
				remote_provider,
				LASSO_MD_PROTOCOL_TYPE_REGISTER_NAME_IDENTIFIER);
	} else {
		if (lasso_provider_accept_http_method(LASSO_PROVIDER(profile->server),
					remote_provider,
					LASSO_MD_PROTOCOL_TYPE_REGISTER_NAME_IDENTIFIER,
					http_method,
					TRUE) == FALSE) {
			return critical_error(LASSO_PROFILE_ERROR_UNSUPPORTED_PROFILE);
		}
	}

	profile->request = lasso_lib_register_name_identifier_request_new_full(
			LASSO_PROVIDER(profile->server)->ProviderID,
			idpNameIdentifier, spNameIdentifier, oldNameIdentifier,
			profile->server->certificate ?
				LASSO_SIGNATURE_TYPE_WITHX509 : LASSO_SIGNATURE_TYPE_SIMPLE,
			LASSO_SIGNATURE_METHOD_RSA_SHA1);
	if (profile->request == NULL) {
		return critical_error(LASSO_PROFILE_ERROR_BUILDING_REQUEST_FAILED);
	}
	LASSO_LIB_REGISTER_NAME_IDENTIFIER_REQUEST(profile->request)->RelayState =
			g_strdup(profile->msg_relayState);

	if (lasso_provider_get_protocol_conformance(remote_provider) < LASSO_PROTOCOL_LIBERTY_1_2) {
		LASSO_SAMLP_REQUEST_ABSTRACT(profile->request)->MajorVersion = 1;
		LASSO_SAMLP_REQUEST_ABSTRACT(profile->request)->MinorVersion = 1;
	}

	profile->http_request_method = http_method;

	return 0;
}


/**
 * lasso_name_registration_process_request_msg:
 * @name_registration: a #LassoNameRegistration
 * @request_msg: the register name identifier request message
 *
 * Processes a lib:RegisterNameIdentifierRequest message.  Rebuilds a request
 * object from the message and optionally verifies its signature.  Sets
 * profile->nameIdentifier to local name identifier.  If it changed (when this
 * is IdP-initiated and there was no previously defined local name identifier)
 * profile->nameIdentifier will be the new one and profile->oldNameIdentiifer
 * the old one.
 *
 * Return value: 0 on success; or a negative value otherwise.
 **/
gint lasso_name_registration_process_request_msg(LassoNameRegistration *name_registration,
		char *request_msg)
{
	LassoProfile *profile;
	LassoProvider *remote_provider;
	LassoMessageFormat format;
	LassoLibRegisterNameIdentifierRequest *request;

	g_return_val_if_fail(LASSO_IS_NAME_REGISTRATION(name_registration),
			LASSO_PARAM_ERROR_INVALID_VALUE);
	g_return_val_if_fail(request_msg != NULL,
			LASSO_PARAM_ERROR_INVALID_VALUE);

	profile = LASSO_PROFILE(name_registration);

	profile->request = lasso_lib_register_name_identifier_request_new();
	format = lasso_node_init_from_message(LASSO_NODE(profile->request), request_msg);
	if (format == LASSO_MESSAGE_FORMAT_UNKNOWN || format == LASSO_MESSAGE_FORMAT_ERROR) {
		return critical_error(LASSO_PROFILE_ERROR_INVALID_MSG);
	}

	remote_provider = lasso_server_get_provider(profile->server,
			LASSO_LIB_REGISTER_NAME_IDENTIFIER_REQUEST(profile->request)->ProviderID);
	if (LASSO_IS_PROVIDER(remote_provider) == FALSE) {
		return critical_error(LASSO_SERVER_ERROR_PROVIDER_NOT_FOUND);
	}

	/* verify signatures */
	profile->signature_status = lasso_provider_verify_signature(
			remote_provider, request_msg, "RequestID", format);

	if (format == LASSO_MESSAGE_FORMAT_SOAP)
		profile->http_request_method = LASSO_HTTP_METHOD_SOAP;
	if (format == LASSO_MESSAGE_FORMAT_QUERY)
		profile->http_request_method = LASSO_HTTP_METHOD_REDIRECT;

	request = LASSO_LIB_REGISTER_NAME_IDENTIFIER_REQUEST(profile->request);

	name_registration->oldNameIdentifier = NULL;
	if (remote_provider->role == LASSO_PROVIDER_ROLE_IDP) {
		/* IdP initiated */
		if (request->SPProvidedNameIdentifier) {
			profile->nameIdentifier = LASSO_NODE(g_object_ref(request->SPProvidedNameIdentifier));
		} else {
			profile->nameIdentifier = LASSO_NODE(g_object_ref(request->IDPProvidedNameIdentifier));
			name_registration->oldNameIdentifier = g_object_ref(
					request->OldProvidedNameIdentifier);
		}
	} else if (remote_provider->role == LASSO_PROVIDER_ROLE_SP) {
		/* SP initiated, profile->name */
		profile->nameIdentifier = LASSO_NODE(g_object_ref(request->IDPProvidedNameIdentifier));
	}

	return profile->signature_status;
}


/**
 * lasso_name_registration_process_response_msg:
 * @name_registration: a #LassoNameRegistration
 * @response_msg: the register name identifier response message
 *
 * Processes a lib:RegisterNameIdentifierResponse message.  Rebuilds a response
 * object from the message and optionally verifies its signature.
 *
 * If the response depicts Success it will also update Principal federation.
 *
 * Return value: 0 on success; or a negative value otherwise.
 **/
gint
lasso_name_registration_process_response_msg(LassoNameRegistration *name_registration,
		char *response_msg)
{
	LassoProfile *profile;
	LassoProvider *remote_provider;
	LassoFederation *federation;
	LassoSamlNameIdentifier *nameIdentifier = NULL;
	LassoLibStatusResponse *response;
	LassoMessageFormat format;
	int rc = 0;
	char *statusCodeValue;

	g_return_val_if_fail(LASSO_IS_NAME_REGISTRATION(name_registration),
			LASSO_PARAM_ERROR_INVALID_VALUE);
	g_return_val_if_fail(response_msg != NULL, LASSO_PARAM_ERROR_INVALID_VALUE);

	profile = LASSO_PROFILE(name_registration);

	/* build register name identifier response from message */
	profile->response = lasso_lib_register_name_identifier_response_new();
	format = lasso_node_init_from_message(LASSO_NODE(profile->response), response_msg);
	if (format == LASSO_MESSAGE_FORMAT_UNKNOWN || format == LASSO_MESSAGE_FORMAT_ERROR) {
		return critical_error(LASSO_PROFILE_ERROR_INVALID_MSG);
	}

	remote_provider = lasso_server_get_provider(profile->server,
			LASSO_LIB_STATUS_RESPONSE(profile->response)->ProviderID);
	if (LASSO_IS_PROVIDER(remote_provider) == FALSE) {
		return critical_error(LASSO_SERVER_ERROR_PROVIDER_NOT_FOUND);
	}

	/* verify signature */
	rc = lasso_provider_verify_signature(remote_provider, response_msg, "ResponseID", format);

	response = LASSO_LIB_STATUS_RESPONSE(profile->response);
	if (response->Status == NULL || response->Status->StatusCode == NULL
			|| response->Status->StatusCode->Value == NULL) {
		return critical_error(LASSO_PROFILE_ERROR_MISSING_STATUS_CODE);
	}
	statusCodeValue = response->Status->StatusCode->Value;

	if (strcmp(statusCodeValue, LASSO_SAML_STATUS_CODE_SUCCESS) != 0) {
		message(G_LOG_LEVEL_CRITICAL, "Status code not success: %s", statusCodeValue);
		return LASSO_PROFILE_ERROR_STATUS_NOT_SUCCESS;
	}

	/* Update federation with the nameIdentifier attribute. NameQualifier
	 * is local ProviderID and format is Federated type */
	if (LASSO_IS_IDENTITY(profile->identity) == FALSE) {
		return critical_error(LASSO_PROFILE_ERROR_IDENTITY_NOT_FOUND);
	}

	federation = g_hash_table_lookup(profile->identity->federations,
			profile->remote_providerID);
	if (LASSO_IS_FEDERATION(federation) == FALSE) {
		return critical_error(LASSO_PROFILE_ERROR_FEDERATION_NOT_FOUND);
	}

	remote_provider = lasso_server_get_provider(profile->server, profile->remote_providerID);
	if (LASSO_IS_PROVIDER(remote_provider) == FALSE) {
		return critical_error(LASSO_SERVER_ERROR_PROVIDER_NOT_FOUND);
	}

	if (remote_provider->role == LASSO_PROVIDER_ROLE_SP) {
		nameIdentifier = LASSO_LIB_REGISTER_NAME_IDENTIFIER_REQUEST(
				profile->request)->IDPProvidedNameIdentifier;
	}
	if (remote_provider->role == LASSO_PROVIDER_ROLE_IDP) {
		nameIdentifier = LASSO_LIB_REGISTER_NAME_IDENTIFIER_REQUEST(
				profile->request)->SPProvidedNameIdentifier;
	}
	if (nameIdentifier == NULL) {
		message(G_LOG_LEVEL_CRITICAL, "Invalid provider role"); /* ??? */
		return LASSO_PROFILE_ERROR_MISSING_NAME_IDENTIFIER;
	}

	if (federation->local_nameIdentifier)
		lasso_node_destroy(LASSO_NODE(federation->local_nameIdentifier));
	federation->local_nameIdentifier = LASSO_NODE(g_object_ref(nameIdentifier));
	profile->identity->is_dirty = TRUE;

	/* set the relay state */
	profile->msg_relayState = g_strdup(
			LASSO_LIB_STATUS_RESPONSE(profile->response)->RelayState);

	return rc;
}


/**
 * lasso_name_registration_validate_request:
 * @name_registration: a #LassoNameRegistration
 *
 * Checks profile request with regards to message status and principal
 * federations, update them accordingly and prepares a
 * lib:RegisterNameIdentifierResponse accordingly.
 *
 * Return value: 0 on success; or a negative value otherwise.
 **/
gint
lasso_name_registration_validate_request(LassoNameRegistration *name_registration)
{
	LassoProfile *profile;
	LassoProvider *remote_provider;
	LassoFederation *federation;
	LassoLibRegisterNameIdentifierRequest *request;
	LassoSamlNameIdentifier *providedNameIdentifier = NULL;

	g_return_val_if_fail(LASSO_IS_NAME_REGISTRATION(name_registration),
			LASSO_PARAM_ERROR_INVALID_VALUE);

	profile = LASSO_PROFILE(name_registration);

	/* verify the register name identifier request */
	if (LASSO_IS_LIB_REGISTER_NAME_IDENTIFIER_REQUEST(profile->request) == FALSE) {
		message(G_LOG_LEVEL_CRITICAL, "Register Name Identifier request not found");
		return LASSO_PROFILE_ERROR_MISSING_REQUEST;
	}

	request = LASSO_LIB_REGISTER_NAME_IDENTIFIER_REQUEST(profile->request);

	/* set the remote provider id from the request */
	profile->remote_providerID = g_strdup(request->ProviderID);
	if (profile->remote_providerID == NULL) {
		return LASSO_PROFILE_ERROR_MISSING_REMOTE_PROVIDERID;
	}

	/* set register name identifier response */
	profile->response = lasso_lib_register_name_identifier_response_new_full(
			LASSO_PROVIDER(profile->server)->ProviderID,
			LASSO_SAML_STATUS_CODE_SUCCESS,
			LASSO_LIB_REGISTER_NAME_IDENTIFIER_REQUEST(profile->request),
			profile->server->certificate ?
				LASSO_SIGNATURE_TYPE_WITHX509 : LASSO_SIGNATURE_TYPE_SIMPLE,
			LASSO_SIGNATURE_METHOD_RSA_SHA1);
	if (LASSO_IS_LIB_REGISTER_NAME_IDENTIFIER_RESPONSE(profile->response) == FALSE) {
		return critical_error(LASSO_PROFILE_ERROR_BUILDING_RESPONSE_FAILED);
	}

	/* verify federation */
	if (profile->identity == NULL) {
		return critical_error(LASSO_PROFILE_ERROR_IDENTITY_NOT_FOUND);
	}

	federation = g_hash_table_lookup(profile->identity->federations,
			profile->remote_providerID);
	if (LASSO_IS_FEDERATION(federation) == FALSE) {
		return critical_error(LASSO_PROFILE_ERROR_FEDERATION_NOT_FOUND);
	}

	if (request->OldProvidedNameIdentifier == NULL) {
		message(G_LOG_LEVEL_CRITICAL, "Old provided name identifier not found");
		return LASSO_PROFILE_ERROR_MISSING_NAME_IDENTIFIER;
	}

	if (lasso_federation_verify_name_identifier(federation, LASSO_NODE(
					request->OldProvidedNameIdentifier)) == FALSE) {
		message(G_LOG_LEVEL_CRITICAL, "No name identifier");
		return LASSO_PROFILE_ERROR_MISSING_NAME_IDENTIFIER;
	}

	remote_provider = lasso_server_get_provider(profile->server, profile->remote_providerID);
	if (LASSO_IS_PROVIDER(remote_provider) == FALSE) {
		return critical_error(LASSO_SERVER_ERROR_PROVIDER_NOT_FOUND);
	}

	/* update name identifier in federation */
	if (remote_provider->role == LASSO_PROVIDER_ROLE_SP) {
		providedNameIdentifier = request->SPProvidedNameIdentifier;
	}
	if (remote_provider->role == LASSO_PROVIDER_ROLE_IDP) {
		providedNameIdentifier = request->IDPProvidedNameIdentifier;
	}
	if (providedNameIdentifier == NULL) {
		message(G_LOG_LEVEL_CRITICAL, "Sp provided name identifier not found");
		return LASSO_PROFILE_ERROR_MISSING_NAME_IDENTIFIER;
	}

	if (federation->remote_nameIdentifier)
		lasso_node_destroy(LASSO_NODE(federation->remote_nameIdentifier));
	federation->remote_nameIdentifier = LASSO_NODE(g_object_ref(providedNameIdentifier));
	profile->identity->is_dirty = TRUE;

	return 0;
}



/*****************************************************************************/
/* private methods                                                           */
/*****************************************************************************/

static struct XmlSnippet schema_snippets[] = {
	{ "OldNameIdentifier", SNIPPET_NODE_IN_CHILD,
		G_STRUCT_OFFSET(LassoNameRegistration, oldNameIdentifier), NULL, NULL, NULL},
	{ "NameRegistrationDumpVersion", SNIPPET_ATTRIBUTE, 0, NULL, NULL, NULL},
	{NULL, 0, 0, NULL, NULL, NULL}
};

static LassoNodeClass *parent_class = NULL;

static xmlNode*
get_xmlNode(LassoNode *node, gboolean lasso_dump)
{
	xmlNode *xmlnode;

	xmlnode = parent_class->get_xmlNode(node, lasso_dump);
	xmlSetProp(xmlnode, (xmlChar*)"NameRegistrationDumpVersion", (xmlChar*)"2");

	return xmlnode;
}

static int
init_from_xml(LassoNode *node, xmlNode *xmlnode)
{
	return parent_class->init_from_xml(node, xmlnode);
}

/*****************************************************************************/
/* instance and class init functions                                         */
/*****************************************************************************/

static void
instance_init(LassoNameRegistration *name_registration)
{
	name_registration->oldNameIdentifier = NULL;
}

static void
class_init(LassoNameRegistrationClass *klass)
{
	LassoNodeClass *nclass = LASSO_NODE_CLASS(klass);

	parent_class = g_type_class_peek_parent(klass);
	nclass->get_xmlNode = get_xmlNode;
	nclass->init_from_xml = init_from_xml;
	nclass->node_data = g_new0(LassoNodeClassData, 1);
	lasso_node_class_set_nodename(nclass, "NameRegistration");
	lasso_node_class_set_ns(nclass, LASSO_LASSO_HREF, LASSO_LASSO_PREFIX);
	lasso_node_class_add_snippets(nclass, schema_snippets);
}

GType
lasso_name_registration_get_type()
{
	static GType this_type = 0;

	if (!this_type) {
		static const GTypeInfo this_info = {
			sizeof (LassoNameRegistrationClass),
			NULL,
			NULL,
			(GClassInitFunc) class_init,
			NULL,
			NULL,
			sizeof(LassoNameRegistration),
			0,
			(GInstanceInitFunc) instance_init,
			NULL
		};

		this_type = g_type_register_static(LASSO_TYPE_PROFILE,
				"LassoNameRegistration", &this_info, 0);
	}
	return this_type;
}

/**
 * lasso_name_registration_new:
 * @server: the #LassoServer
 *
 * Creates a new #LassoNameRegistration.
 *
 * Return value: a newly created #LassoNameRegistration object; or NULL if
 *     an error occured
 **/
LassoNameRegistration *
lasso_name_registration_new(LassoServer *server)
{
	LassoNameRegistration *name_registration;

	g_return_val_if_fail(LASSO_IS_SERVER(server), NULL);

	name_registration = g_object_new(LASSO_TYPE_NAME_REGISTRATION, NULL);
	LASSO_PROFILE(name_registration)->server = g_object_ref(server);

	return name_registration;
}

/**
 * lasso_name_registration_new_from_dump:
 * @server: the #LassoServer
 * @dump: XML logout dump
 *
 * Restores the @dump to a new #LassoNameRegistration.
 *
 * Return value: a newly created #LassoNameRegistration; or NULL if an error
 *     occured
 **/
LassoNameRegistration*
lasso_name_registration_new_from_dump(LassoServer *server, const char *dump)
{
	LassoNameRegistration *name_registration;
	xmlDoc *doc;

	if (dump == NULL)
		return NULL;

	name_registration = lasso_name_registration_new(server);
	doc = xmlParseMemory(dump, strlen(dump));
	init_from_xml(LASSO_NODE(name_registration), xmlDocGetRootElement(doc));
	lasso_release_doc(doc);

	return name_registration;
}

/**
 * lasso_name_registration_dump:
 * @name_registration: a #LassoNameRegistration
 *
 * Dumps @name_registration content to an XML string.
 *
 * Return value:(transfer full): the dump string.  It must be freed by the caller.
 **/
gchar *
lasso_name_registration_dump(LassoNameRegistration *name_registration)
{
	return lasso_node_dump(LASSO_NODE(name_registration));
}
