For testing purposes, add a pam_return module which can be configured to

return any value, either by name (e.g. PAM_AUTH_ERR) or by number, even
if that number is out of range.


git-svn-id: svn+ssh://svn.openpam.org/svn/openpam/trunk@873 185d5e19-27fe-0310-9dcf-9bff6b9f3609

modules/Makefile.am

@@ -1,6 +1,6 @@
 # $Id$
 
-SUBDIRS = pam_deny pam_permit
+SUBDIRS = pam_deny pam_permit pam_return
 
 if WITH_PAM_UNIX
 SUBDIRS += pam_unix

modules/pam_return/Makefile.am

@@ -0,0 +1,19 @@
+# $Id$
+
+if CUSTOM_MODULES_DIR
+moduledir = $(OPENPAM_MODULES_DIR)
+else
+moduledir = $(libdir)
+endif
+AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_srcdir)/lib/libpam
+
+module_LTLIBRARIES = pam_return.la
+
+pam_return_la_SOURCES = pam_return.c
+pam_return_la_LDFLAGS = -no-undefined -module -version-info $(LIB_MAJ) \
+	-export-symbols-regex '^pam_sm_'
+if WITH_SYSTEM_LIBPAM
+pam_return_la_LIBADD = $(SYSTEM_LIBPAM)
+else
+pam_return_la_LIBADD = $(top_builddir)/lib/libpam/libpam.la
+endif

modules/pam_return/pam_return.c

@@ -0,0 +1,127 @@
+/*-
+ * Copyright (c) 2015 Dag-Erling Smørgrav
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * $Id$
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <sys/param.h>
+
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <security/pam_modules.h>
+#include <security/openpam.h>
+
+#include "openpam_impl.h"
+
+static int
+pam_return(pam_handle_t *pamh, int flags,
+	int argc, const char *argv[])
+{
+	const char *errname;
+	char *e;
+	long errcode;
+
+	(void)flags;
+	(void)argc;
+	(void)argv;
+	if ((errname = openpam_get_option(pamh, "error")) == NULL ||
+	    errname[0] == '\0') {
+		openpam_log(PAM_LOG_ERROR, "missing error parameter");
+		return (PAM_SYSTEM_ERR);
+	}
+	/* is it a number? */
+	errcode = strtol(errname, &e, 10);
+	if (e != NULL && *e == '\0') {
+		/* yep, check range */
+		if (errcode >= INT_MIN && errcode <= INT_MAX)
+			return (errcode);
+	} else {
+		/* nope, look it up */
+		for (errcode = 0; errcode < PAM_NUM_ERRORS; ++errcode)
+			if (strcmp(errname, pam_err_name[errcode]) == 0)
+				return (errcode);
+	}
+	openpam_log(PAM_LOG_ERROR, "invalid error code '%s'", errname);
+	return (PAM_SYSTEM_ERR);
+}
+
+PAM_EXTERN int
+pam_sm_authenticate(pam_handle_t *pamh, int flags,
+	int argc, const char *argv[])
+{
+
+	return (pam_return(pamh, flags, argc, argv));
+}
+
+PAM_EXTERN int
+pam_sm_setcred(pam_handle_t *pamh, int flags,
+	int argc, const char *argv[])
+{
+
+	return (pam_return(pamh, flags, argc, argv));
+}
+
+PAM_EXTERN int
+pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
+	int argc, const char *argv[])
+{
+
+	return (pam_return(pamh, flags, argc, argv));
+}
+
+PAM_EXTERN int
+pam_sm_open_session(pam_handle_t *pamh, int flags,
+	int argc, const char *argv[])
+{
+
+	return (pam_return(pamh, flags, argc, argv));
+}
+
+PAM_EXTERN int
+pam_sm_close_session(pam_handle_t *pamh, int flags,
+	int argc, const char *argv[])
+{
+
+	return (pam_return(pamh, flags, argc, argv));
+}
+
+PAM_EXTERN int
+pam_sm_chauthtok(pam_handle_t *pamh, int flags,
+	int argc, const char *argv[])
+{
+
+	return (pam_return(pamh, flags, argc, argv));
+}
+
+PAM_MODULE_ENTRY("pam_return");