/* * rlm_smb.c * * Version: $Id$ * * 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, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA * * Copyright 2002,2006 The FreeRADIUS server project * Copyright 2002 Alan DeKok <aland@ox.org> */ #include <freeradius-devel/ident.h> RCSID("$Id$") #include <freeradius-devel/radiusd.h> #include <freeradius-devel/modules.h> #include "valid.h" /* * Define a structure for our module configuration. * * These variables do not need to be in a structure, but it's * a lot cleaner to do so, and a pointer to the structure can * be used as the instance handle. */ typedef struct rlm_smb_t { char *server; char *backup; char *domain; } rlm_smb_t; /* * A mapping of configuration file names to internal variables. * * Note that the string is dynamically allocated, so it MUST * be freed. When the configuration file parse re-reads the string, * it free's the old one, and strdup's the new one, placing the pointer * to the strdup'd string into 'config.string'. This gets around * buffer over-flows. */ static const CONF_PARSER module_config[] = { { "server", PW_TYPE_STRING_PTR, offsetof(rlm_smb_t,server), NULL, NULL}, { "backup", PW_TYPE_STRING_PTR, offsetof(rlm_smb_t,backup), NULL, NULL}, { "domain", PW_TYPE_STRING_PTR, offsetof(rlm_smb_t,domain), NULL, NULL}, { NULL, -1, 0, NULL, NULL } /* end the list */ }; /* * Do any per-module initialization that is separate to each * configured instance of the module. e.g. set up connections * to external databases, read configuration files, set up * dictionary entries, etc. * * If configuration information is given in the config section * that must be referenced in later calls, store a handle to it * in *instance otherwise put a null pointer there. */ static int smb_instantiate(CONF_SECTION *conf, void **instance) { rlm_smb_t *data; /* * Set up a storage area for instance data */ data = rad_malloc(sizeof(*data)); if (!data) { return -1; } memset(data, 0, sizeof(*data)); /* * If the configuration parameters can't be parsed, then * fail. */ if (cf_section_parse(conf, data, module_config) < 0) { free(data); return -1; } *instance = data; return 0; } /* * Authenticate the user with the given password. */ static int smb_authenticate(void *instance, REQUEST *request) { rlm_smb_t *data = (rlm_smb_t *) instance; int rcode; /* * We can only authenticate user requests which HAVE * a User-Name attribute. */ if (!request->username) { radlog(L_AUTH, "rlm_smb: Attribute \"User-Name\" is required for authentication."); return RLM_MODULE_INVALID; } /* * We can only authenticate user requests which HAVE * a User-Password attribute. */ if (!request->password) { radlog(L_AUTH, "rlm_smb: Attribute \"User-Password\" is required for authentication."); return RLM_MODULE_INVALID; } /* * Ensure that we're being passed a plain-text password, * and not anything else. */ if (request->password->attribute != PW_USER_PASSWORD) { radlog(L_AUTH, "rlm_smb: Attribute \"User-Password\" is required for authentication. Cannot use \"%s\".", request->password->name); return RLM_MODULE_INVALID; } /* * Call the SMB magic to do the work. */ rcode = Valid_User(request->username->vp_strvalue, request->password->vp_strvalue, data->server, data->backup, data->domain); switch (rcode) { case 0: /* success */ return RLM_MODULE_OK; break; case 1: /* network failure */ case 2: /* protocol failure */ return RLM_MODULE_FAIL; break; case 3: /* invalid user name or password */ return RLM_MODULE_REJECT; } /* * Something weird happened. Give up. */ return RLM_MODULE_INVALID; } static int smb_detach(void *instance) { rlm_smb_t *data = (rlm_smb_t *) instance; free(instance); return 0; } /* * The module name should be the only globally exported symbol. * That is, everything else should be 'static'. * * If the module needs to temporarily modify it's instantiation * data, the type should be changed to RLM_TYPE_THREAD_UNSAFE. * The server will then take care of ensuring that the module * is single-threaded. */ module_t rlm_smb = { RLM_MODULE_INIT, "SMB", RLM_TYPE_THREAD_UNSAFE, /* type */ smb_instantiate, /* instantiation */ smb_detach, /* detach */ { smb_authenticate, /* authentication */ NULL, /* authorization */ NULL, /* preaccounting */ NULL, /* accounting */ NULL, /* checksimul */ NULL, /* pre-proxy */ NULL, /* post-proxy */ NULL /* post-auth */ }, };