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/* blacklist.c -- Functions for processing openvpn_blacklist records
*
* GPLv2 only - Copyright (C) 2009 - 2010
* David Sommerseth <dazo@users.sourceforge.net>
*
* 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; version 2
* of the License.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/**
* @file sqlite/administration/blacklist.c
* @author David Sommerseth <dazo@users.sourceforge.net>
* @date 2009-05-09
*
* @brief Functions for administering the blacklist table
*
*/
#include <string.h>
#include <unistd.h>
#include <assert.h>
#include <libxml/tree.h>
#include <sqlite3.h>
#include <eurephia_nullsafe.h>
#include <eurephia_context.h>
#include <eurephia_log.h>
#include <eurephia_xml.h>
#include <eurephia_values.h>
#include <eurephiadb_session_struct.h>
#include <eurephiadb_mapping.h>
#include <passwd.h>
#include "../sqlite.h"
#define FMAP_OVPNBLACKLIST /**< fieldmapping.h: Include declaration of tbl_sqlite_blacklist */
#include "../fieldmapping.h"
/**
* Internal function. Retrieves a list of all registered entries in the blacklist table
*
* @param ctx eurephiaCTX
* @param fmap eDBfieldMap containing the search query
*
* @return Returns a valid eurephia XML document on success, otherwise NULL
*/
xmlDoc *blacklist_list(eurephiaCTX *ctx, eDBfieldMap *fmap) {
dbresult *res = NULL;
xmlDoc *doc = NULL;
xmlNode *root_n = NULL, *uname_n = NULL, *cert_n = NULL, *remip_n = NULL;
int i = 0;
// Query the database for registered attempts
res = sqlite_query_mapped(ctx, SQL_SELECT,
"SELECT username, lower(digest), remoteip,"
" locdt(registered), locdt(last_accessed), blid"
" FROM openvpn_blacklist",
NULL, fmap, "blid");
if( sqlite_query_status(res) != dbSUCCESS ) {
eurephia_log(ctx, LOG_ERROR, 0, "Error querying the blacklist register");
sqlite_log_error(ctx, res);
sqlite_free_results(res);
return NULL;
}
eurephiaXML_CreateDoc(ctx, 1, "blacklist", &doc, &root_n);
xmlNewProp(root_n, (xmlChar *) "mode", (xmlChar *) "list");
for( i = 0; i < sqlite_get_numtuples(res); i++ ) {
xmlNode *blist_n = NULL;
if( sqlite_get_value(res, i, 0) != NULL ) { // Username
if( uname_n == NULL ) {
uname_n = xmlNewChild(root_n, NULL, (xmlChar *) "username", NULL);
assert( uname_n != NULL );
}
blist_n = xmlNewChild(uname_n, NULL, (xmlChar *) "blacklisted", NULL);
sqlite_xml_value(blist_n, XML_NODE, "username", res, i, 0);
} else if( sqlite_get_value(res, i, 1) != NULL ) { // Digest
if( cert_n == NULL ) {
cert_n = xmlNewChild(root_n, NULL, (xmlChar *) "certificate", NULL);
assert( cert_n != NULL );
}
blist_n = xmlNewChild(cert_n, NULL, (xmlChar *) "blacklisted", NULL);
sqlite_xml_value(blist_n, XML_NODE, "certificate", res, i, 1);
} else if( sqlite_get_value(res, i, 2) != NULL ) { // IP address
if( remip_n == NULL ) {
remip_n = xmlNewChild(root_n, NULL, (xmlChar *) "ipaddress", NULL);
assert( remip_n != NULL );
}
blist_n = xmlNewChild(remip_n, NULL, (xmlChar *) "blacklisted", NULL);
sqlite_xml_value(blist_n, XML_NODE, "ipaddress", res, i, 2);
} else {
continue;
}
sqlite_xml_value(blist_n, XML_ATTR, "blid", res, i, 5);
sqlite_xml_value(blist_n, XML_NODE, "registered", res, i, 3);
sqlite_xml_value(blist_n, XML_NODE, "last_accessed", res, i, 4);
}
sqlite_free_results(res);
return doc;
}
/**
* Internal function. Registers a new entry in the blacklist.
*
* @param ctx eurephiaCTX
* @param fmap eDBfieldMap containing the entry to be registered
*
* @return Returns an eurephia ResultMsg XML document, with success message or an error message
*/
xmlDoc *blacklist_add(eurephiaCTX *ctx, eDBfieldMap *fmap) {
dbresult *res = NULL;
xmlDoc *ret = NULL;
int fields = 0;
fields = eDBmappingFieldsPresent(fmap);
if( (fields != FIELD_UNAME) && (fields != FIELD_CERTDIGEST) && (fields != FIELD_REMOTEIP) ) {
return eurephiaXML_ResultMsg(ctx, exmlERROR, NULL,
"Missing username, IP address or certificate digest, "
"or multiple of these fields were given.");
}
res = sqlite_query_mapped(ctx, SQL_INSERT, "INSERT INTO openvpn_blacklist", fmap, NULL, NULL);
if( sqlite_query_status(res) == dbSUCCESS ) {
ret = eurephiaXML_ResultMsg(ctx, exmlRESULT, NULL, "Record registered in the blacklist");
} else {
xmlNode *err_n = NULL;
eurephia_log(ctx, LOG_FATAL, 0, "Could not blacklist the requested data");
err_n = sqlite_log_error_xml(ctx, res);
ret = eurephiaXML_ResultMsg(ctx, exmlERROR, err_n, "Blacklisting failed");
xmlFreeNode(err_n);
}
sqlite_free_results(res);
return ret;
}
/**
* Internal function. Deletes an entry from the blacklist
*
* @param ctx eurephiaCTX
* @param fmap eDBfieldMap containing the entry to be deleted
*
* @return Returns an eurephia ResultMsg XML document, with success message or an error message
*/
xmlDoc *blacklist_delete(eurephiaCTX *ctx, eDBfieldMap *fmap) {
dbresult *res = NULL;
xmlDoc *ret = NULL;
int fields;
fields = eDBmappingFieldsPresent(fmap);
if( (fields & (FIELD_UNAME | FIELD_CERTDIGEST | FIELD_REMOTEIP | FIELD_RECID)) == 0 ) {
return eurephiaXML_ResultMsg(ctx, exmlERROR, NULL,
"Missing username, IP address, certificate digest or blacklist ID");
}
res = sqlite_query_mapped(ctx, SQL_DELETE, "DELETE FROM openvpn_blacklist", NULL, fmap, NULL);
if( sqlite_query_status(res) == dbSUCCESS ) {
ret = eurephiaXML_ResultMsg(ctx, exmlRESULT, NULL, "Blacklisting removed");
} else {
xmlNode *err_n = NULL;
eurephia_log(ctx, LOG_FATAL, 0, "Could not remove blacklisting");
err_n = sqlite_log_error_xml(ctx, res);
ret = eurephiaXML_ResultMsg(ctx, exmlERROR, err_n, "Failed to remove the blacklisting");
xmlFreeNode(err_n);
}
sqlite_free_results(res);
return ret;
}
/**
* @copydoc eDBadminBlacklist()
*/
xmlDoc *eDBadminBlacklist(eurephiaCTX *ctx, xmlDoc *qryxml) {
eDBfieldMap *fmap = NULL;
char *mode = NULL;
xmlDoc *resxml = NULL;
xmlNode *root_n = NULL, *fieldmap_n = NULL;
DEBUG(ctx, 20, "Function call: eDBadminBlacklist(ctx, {xmlDoc})");
assert( (ctx != NULL) && (qryxml != NULL) );
if( (ctx->context_type != ECTX_ADMIN_CONSOLE) && (ctx->context_type != ECTX_ADMIN_WEB) ) {
eurephia_log(ctx, LOG_CRITICAL, 0,
"eurephia admin function call attempted with wrong context type");
return NULL;
}
root_n = eurephiaXML_getRoot(ctx, qryxml, "blacklist", 1);
if( root_n == NULL ) {
eurephia_log(ctx, LOG_CRITICAL, 0, "Invalid XML input.");
return NULL;
}
mode = xmlGetAttrValue(root_n->properties, "mode");
if( mode == NULL ) {
eurephia_log(ctx, LOG_ERROR, 0, "Missing mode attribute");
return NULL;
}
fieldmap_n = xmlFindNode(root_n, "fieldMapping");
if( fieldmap_n == NULL ) {
eurephia_log(ctx, LOG_ERROR, 0, "Missing fieldMapping");
}
fmap = eDBxmlMapping(ctx, tbl_sqlite_blacklist, NULL, fieldmap_n);
if( strcmp(mode, "list") == 0 ) {
resxml = blacklist_list(ctx, fmap);
} else if( strcmp(mode, "add") == 0 ) {
resxml = blacklist_add(ctx, fmap);
} else if( strcmp(mode, "delete") == 0 ) {
resxml = blacklist_delete(ctx, fmap);
} else {
eurephia_log(ctx, LOG_ERROR, 0, "Blacklist - Unknown mode: '%s'", mode);
resxml = eurephiaXML_ResultMsg(ctx, exmlERROR, NULL, "Unknown mode '%s'", mode);
}
eDBfreeMapping(fmap);
return resxml;
}
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