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Diffstat (limited to 'lib/openpam_load.c')
| -rw-r--r-- | lib/openpam_load.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/lib/openpam_load.c b/lib/openpam_load.c new file mode 100644 index 0000000..303f3f5 --- /dev/null +++ b/lib/openpam_load.c @@ -0,0 +1,153 @@ +/*- + * Copyright (c) 2002-2003 Networks Associates Technology, Inc. + * Copyright (c) 2004-2007 Dag-Erling Smørgrav + * All rights reserved. + * + * This software was developed for the FreeBSD Project by ThinkSec AS and + * Network Associates Laboratories, the Security Research Division of + * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 + * ("CBOSS"), as part of the DARPA CHATS research program. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $Id: openpam_load.c 408 2007-12-21 11:36:24Z des $ + */ + +#include <dlfcn.h> +#include <stdlib.h> +#include <string.h> + +#include <security/pam_appl.h> + +#include "openpam_impl.h" + +const char *_pam_func_name[PAM_NUM_PRIMITIVES] = { + "pam_authenticate", + "pam_setcred", + "pam_acct_mgmt", + "pam_open_session", + "pam_close_session", + "pam_chauthtok" +}; + +const char *_pam_sm_func_name[PAM_NUM_PRIMITIVES] = { + "pam_sm_authenticate", + "pam_sm_setcred", + "pam_sm_acct_mgmt", + "pam_sm_open_session", + "pam_sm_close_session", + "pam_sm_chauthtok" +}; + +/* + * Locate a matching dynamic or static module. + */ + +pam_module_t * +openpam_load_module(const char *path) +{ + pam_module_t *module; + + module = openpam_dynamic(path); + openpam_log(PAM_LOG_DEBUG, "%s dynamic %s", + (module == NULL) ? "no" : "using", path); + +#ifdef OPENPAM_STATIC_MODULES + /* look for a static module */ + if (module == NULL && strchr(path, '/') == NULL) { + module = openpam_static(path); + openpam_log(PAM_LOG_DEBUG, "%s static %s", + (module == NULL) ? "no" : "using", path); + } +#endif + if (module == NULL) { + openpam_log(PAM_LOG_ERROR, "no %s found", path); + return (NULL); + } + return (module); +} + + +/* + * Release a module. + * XXX highly thread-unsafe + */ + +static void +openpam_release_module(pam_module_t *module) +{ + if (module == NULL) + return; + if (module->dlh == NULL) + /* static module */ + return; + dlclose(module->dlh); + openpam_log(PAM_LOG_DEBUG, "releasing %s", module->path); + FREE(module->path); + FREE(module); +} + + +/* + * Destroy a chain, freeing all its links and releasing the modules + * they point to. + */ + +static void +openpam_destroy_chain(pam_chain_t *chain) +{ + if (chain == NULL) + return; + openpam_destroy_chain(chain->next); + chain->next = NULL; + while (chain->optc) { + --chain->optc; + FREE(chain->optv[chain->optc]); + } + FREE(chain->optv); + openpam_release_module(chain->module); + chain->module = NULL; + FREE(chain); +} + + +/* + * Clear the chains and release the modules + */ + +void +openpam_clear_chains(pam_chain_t *policy[]) +{ + int i; + + for (i = 0; i < PAM_NUM_FACILITIES; ++i) { + openpam_destroy_chain(policy[i]); + policy[i] = NULL; + } +} + +/* + * NOPARSE + */ |
