diff options
Diffstat (limited to 'lib/openpam_dynamic.c')
| -rw-r--r-- | lib/openpam_dynamic.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/lib/openpam_dynamic.c b/lib/openpam_dynamic.c new file mode 100644 index 0000000..084408e --- /dev/null +++ b/lib/openpam_dynamic.c @@ -0,0 +1,110 @@ +/*- + * 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_dynamic.c 408 2007-12-21 11:36:24Z des $ + */ + +#include <dlfcn.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <security/pam_appl.h> + +#include "openpam_impl.h" + +#ifndef RTLD_NOW +#define RTLD_NOW RTLD_LAZY +#endif + +/* + * OpenPAM internal + * + * Locate a dynamically linked module + */ + +pam_module_t * +openpam_dynamic(const char *path) +{ + pam_module_t *module; + const char *prefix; + char *vpath; + void *dlh; + int i; + + dlh = NULL; + if ((module = calloc(1, sizeof *module)) == NULL) + goto buf_err; + + /* Prepend the standard prefix if not an absolute pathname. */ + if (path[0] != '/') + prefix = OPENPAM_MODULES_DIR; + else + prefix = ""; + + /* try versioned module first, then unversioned module */ + if (asprintf(&vpath, "%s%s.%d", prefix, path, LIB_MAJ) < 0) + goto buf_err; + if ((dlh = dlopen(vpath, RTLD_NOW)) == NULL) { + openpam_log(PAM_LOG_DEBUG, "%s: %s", vpath, dlerror()); + *strrchr(vpath, '.') = '\0'; + if ((dlh = dlopen(vpath, RTLD_NOW)) == NULL) { + openpam_log(PAM_LOG_DEBUG, "%s: %s", vpath, dlerror()); + FREE(vpath); + FREE(module); + return (NULL); + } + } + FREE(vpath); + if ((module->path = strdup(path)) == NULL) + goto buf_err; + module->dlh = dlh; + for (i = 0; i < PAM_NUM_PRIMITIVES; ++i) { + module->func[i] = (pam_func_t)dlsym(dlh, _pam_sm_func_name[i]); + if (module->func[i] == NULL) + openpam_log(PAM_LOG_DEBUG, "%s: %s(): %s", + path, _pam_sm_func_name[i], dlerror()); + } + return (module); + buf_err: + openpam_log(PAM_LOG_ERROR, "%m"); + if (dlh != NULL) + dlclose(dlh); + FREE(module); + return (NULL); +} + +/* + * NOPARSE + */ |
