1 files changed, 135 insertions, 0 deletions
diff --git a/lib/libpam/openpam_load.c b/lib/libpam/openpam_load.c
new file mode 100644
index 0000000..871d1a8
--- /dev/null
+++ b/lib/libpam/openpam_load.c
@@ -0,0 +1,135 @@
+/*-
+ * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
+ * Copyright (c) 2004-2011 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 547 2012-04-01 15:01:21Z des $
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <dlfcn.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <security/pam_appl.h>
+
+#include "openpam_impl.h"
+
+/*
+ * 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;
+	FREEV(chain->optc, 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
+ */