Flatten and clean up.

1 files changed, 240 insertions, 0 deletions

diff --git a/lib/openpam_dispatch.c b/lib/openpam_dispatch.c
new file mode 100644
index 0000000..69fe472
--- /dev/null
+++ b/lib/openpam_dispatch.c
@@ -0,0 +1,240 @@
+/*-
+ * 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_dispatch.c 408 2007-12-21 11:36:24Z des $
+ */
+
+#include <sys/param.h>
+
+#include <security/pam_appl.h>
+
+#include "openpam_impl.h"
+
+#if !defined(OPENPAM_RELAX_CHECKS)
+static void _openpam_check_error_code(int, int);
+#else
+#define _openpam_check_error_code(a, b)
+#endif /* !defined(OPENPAM_RELAX_CHECKS) */
+
+/*
+ * OpenPAM internal
+ *
+ * Execute a module chain
+ */
+
+int
+openpam_dispatch(pam_handle_t *pamh,
+	int primitive,
+	int flags)
+{
+	pam_chain_t *chain;
+	int err, fail, r;
+#ifdef DEBUG
+	int debug;
+#endif
+
+	ENTER();
+	if (pamh == NULL)
+		RETURNC(PAM_SYSTEM_ERR);
+
+	/* prevent recursion */
+	if (pamh->current != NULL) {
+		openpam_log(PAM_LOG_ERROR,
+		    "%s() called while %s::%s() is in progress",
+		    _pam_func_name[primitive],
+		    pamh->current->module->path,
+		    _pam_sm_func_name[pamh->primitive]);
+		RETURNC(PAM_ABORT);
+	}
+
+	/* pick a chain */
+	switch (primitive) {
+	case PAM_SM_AUTHENTICATE:
+	case PAM_SM_SETCRED:
+		chain = pamh->chains[PAM_AUTH];
+		break;
+	case PAM_SM_ACCT_MGMT:
+		chain = pamh->chains[PAM_ACCOUNT];
+		break;
+	case PAM_SM_OPEN_SESSION:
+	case PAM_SM_CLOSE_SESSION:
+		chain = pamh->chains[PAM_SESSION];
+		break;
+	case PAM_SM_CHAUTHTOK:
+		chain = pamh->chains[PAM_PASSWORD];
+		break;
+	default:
+		RETURNC(PAM_SYSTEM_ERR);
+	}
+
+	/* execute */
+	for (err = fail = 0; chain != NULL; chain = chain->next) {
+		if (chain->module->func[primitive] == NULL) {
+			openpam_log(PAM_LOG_ERROR, "%s: no %s()",
+			    chain->module->path, _pam_sm_func_name[primitive]);
+			continue;
+		} else {
+			pamh->primitive = primitive;
+			pamh->current = chain;
+#ifdef DEBUG
+			debug = (openpam_get_option(pamh, "debug") != NULL);
+			if (debug)
+				++_openpam_debug;
+			openpam_log(PAM_LOG_DEBUG, "calling %s() in %s",
+			    _pam_sm_func_name[primitive], chain->module->path);
+#endif
+			r = (chain->module->func[primitive])(pamh, flags,
+			    chain->optc, (const char **)chain->optv);
+			pamh->current = NULL;
+#ifdef DEBUG
+			openpam_log(PAM_LOG_DEBUG, "%s: %s(): %s",
+			    chain->module->path, _pam_sm_func_name[primitive],
+			    pam_strerror(pamh, r));
+			if (debug)
+				--_openpam_debug;
+#endif
+		}
+
+		if (r == PAM_IGNORE)
+			continue;
+		if (r == PAM_SUCCESS) {
+			/*
+			 * For pam_setcred() and pam_chauthtok() with the
+			 * PAM_PRELIM_CHECK flag, treat "sufficient" as
+			 * "optional".
+			 */
+			if ((chain->flag == PAM_SUFFICIENT ||
+			    chain->flag == PAM_BINDING) && !fail &&
+			    primitive != PAM_SM_SETCRED &&
+			    !(primitive == PAM_SM_CHAUTHTOK &&
+				(flags & PAM_PRELIM_CHECK)))
+				break;
+			continue;
+		}
+
+		_openpam_check_error_code(primitive, r);
+
+		/*
+		 * Record the return code from the first module to
+		 * fail.  If a required module fails, record the
+		 * return code from the first required module to fail.
+		 */
+		if (err == 0)
+			err = r;
+		if ((chain->flag == PAM_REQUIRED ||
+		    chain->flag == PAM_BINDING) && !fail) {
+			openpam_log(PAM_LOG_DEBUG, "required module failed");
+			fail = 1;
+			err = r;
+		}
+
+		/*
+		 * If a requisite module fails, terminate the chain
+		 * immediately.
+		 */
+		if (chain->flag == PAM_REQUISITE) {
+			openpam_log(PAM_LOG_DEBUG, "requisite module failed");
+			fail = 1;
+			break;
+		}
+	}
+
+	if (!fail && err != PAM_NEW_AUTHTOK_REQD)
+		err = PAM_SUCCESS;
+	RETURNC(err);
+}
+
+#if !defined(OPENPAM_RELAX_CHECKS)
+static void
+_openpam_check_error_code(int primitive, int r)
+{
+	/* common error codes */
+	if (r == PAM_SUCCESS ||
+	    r == PAM_SERVICE_ERR ||
+	    r == PAM_BUF_ERR ||
+	    r == PAM_CONV_ERR ||
+	    r == PAM_PERM_DENIED ||
+	    r == PAM_ABORT)
+		return;
+
+	/* specific error codes */
+	switch (primitive) {
+	case PAM_SM_AUTHENTICATE:
+		if (r == PAM_AUTH_ERR ||
+		    r == PAM_CRED_INSUFFICIENT ||
+		    r == PAM_AUTHINFO_UNAVAIL ||
+		    r == PAM_USER_UNKNOWN ||
+		    r == PAM_MAXTRIES)
+			return;
+		break;
+	case PAM_SM_SETCRED:
+		if (r == PAM_CRED_UNAVAIL ||
+		    r == PAM_CRED_EXPIRED ||
+		    r == PAM_USER_UNKNOWN ||
+		    r == PAM_CRED_ERR)
+			return;
+		break;
+	case PAM_SM_ACCT_MGMT:
+		if (r == PAM_USER_UNKNOWN ||
+		    r == PAM_AUTH_ERR ||
+		    r == PAM_NEW_AUTHTOK_REQD ||
+		    r == PAM_ACCT_EXPIRED)
+			return;
+		break;
+	case PAM_SM_OPEN_SESSION:
+	case PAM_SM_CLOSE_SESSION:
+		if (r == PAM_SESSION_ERR)
+			return;
+		break;
+	case PAM_SM_CHAUTHTOK:
+		if (r == PAM_PERM_DENIED ||
+		    r == PAM_AUTHTOK_ERR ||
+		    r == PAM_AUTHTOK_RECOVERY_ERR ||
+		    r == PAM_AUTHTOK_LOCK_BUSY ||
+		    r == PAM_AUTHTOK_DISABLE_AGING ||
+		    r == PAM_TRY_AGAIN)
+			return;
+		break;
+	}
+
+	openpam_log(PAM_LOG_ERROR, "%s(): unexpected return value %d",
+	    _pam_sm_func_name[primitive], r);
+}
+#endif /* !defined(OPENPAM_RELAX_CHECKS) */
+
+/*
+ * NODOC
+ *
+ * Error codes:
+ */