libcli:smb: Add smb_signing_setting_translate()

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>

libcli/smb/smb_util.h

@@ -24,6 +24,9 @@
 #include "smb_constants.h"
 #include <talloc.h>
 
+#ifndef _SMB_UTIL_H
+#define _SMB_UTIL_H
+
 const char *smb_protocol_types_string(enum protocol_types protocol);
 char *attrib_string(TALLOC_CTX *mem_ctx, uint32_t attrib);
 uint32_t unix_perms_to_wire(mode_t perms);
@@ -46,3 +49,7 @@ NTSTATUS smb_bytes_pull_str(TALLOC_CTX *mem_ctx, char **_str, bool ucs2,
 			    const uint8_t *buf, size_t buf_len,
 			    const uint8_t *position,
 			    size_t *_consumed);
+
+enum smb_signing_setting smb_signing_setting_translate(const char *str);
+
+#endif /* _SMB_UTIL_H */

libcli/smb/test_util_translate.c

@@ -0,0 +1,64 @@
+/*
+ * Unix SMB/CIFS implementation.
+ *
+ * Copyright (C) 2020      Andreas Schneider <asn@samba.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <setjmp.h>
+#include <cmocka.h>
+
+#include "lib/replace/replace.h"
+#include <talloc.h>
+
+#include "libcli/smb/util.c"
+
+static void test_smb_signing_setting_translate(void **state)
+{
+	enum smb_signing_setting signing_state;
+
+	signing_state = smb_signing_setting_translate("wurst");
+	assert_int_equal(signing_state, SMB_SIGNING_REQUIRED);
+
+	signing_state = smb_signing_setting_translate("off");
+	assert_int_equal(signing_state, SMB_SIGNING_OFF);
+
+	signing_state = smb_signing_setting_translate("if_required");
+	assert_int_equal(signing_state, SMB_SIGNING_IF_REQUIRED);
+
+	signing_state = smb_signing_setting_translate("mandatory");
+	assert_int_equal(signing_state, SMB_SIGNING_REQUIRED);
+
+}
+
+int main(int argc, char *argv[])
+{
+	int rc;
+	const struct CMUnitTest tests[] = {
+		cmocka_unit_test(test_smb_signing_setting_translate),
+	};
+
+	if (argc == 2) {
+		cmocka_set_test_filter(argv[1]);
+	}
+	cmocka_set_message_output(CM_OUTPUT_SUBUNIT);
+
+	rc = cmocka_run_group_tests(tests, NULL, NULL);
+
+	return rc;
+}

libcli/smb/util.c

@@ -22,6 +22,7 @@
 #include "includes.h"
 #include "libcli/smb/smb_common.h"
 #include "system/filesys.h"
+#include "lib/param/loadparm.h"
 
 const char *smb_protocol_types_string(enum protocol_types protocol)
 {
@@ -428,3 +429,22 @@ NTSTATUS smb_bytes_pull_str(TALLOC_CTX *mem_ctx, char **_str, bool ucs2,
 	return internal_bytes_pull_str(mem_ctx, _str, ucs2, true,
 				       buf, buf_len, position, _consumed);
 }
+
+/**
+ * @brief Translate SMB signing settings as string to an enum.
+ *
+ * @param[in]  str  The string to translate.
+ *
+ * @return A corresponding enum @smb_signing_setting tranlated from the string.
+ */
+enum smb_signing_setting smb_signing_setting_translate(const char *str)
+{
+	enum smb_signing_setting signing_state = SMB_SIGNING_REQUIRED;
+	int32_t val = lpcfg_parse_enum_vals("client signing", str);
+
+	if (val != INT32_MIN) {
+		signing_state = val;
+	}
+
+	return signing_state;
+}

libcli/smb/wscript

@@ -72,3 +72,8 @@ def build(bld):
                      source='test_smb1cli_session.c',
                      deps='cmocka cli_smb_common',
                      for_selftest=True)
+
+    bld.SAMBA_BINARY('test_util_translate',
+                     source='test_util_translate.c',
+                     deps='cmocka cli_smb_common',
+                     for_selftest=True)

selftest/tests.py

@@ -376,6 +376,8 @@ plantestsuite("samba.unittests.lib_util_modules", "none",
 
 plantestsuite("samba.unittests.smb1cli_session", "none",
               [os.path.join(bindir(), "default/libcli/smb/test_smb1cli_session")])
+plantestsuite("samba.unittests.smb_util_translate", "none",
+              [os.path.join(bindir(), "default/libcli/smb/test_util_translate")])
 
 plantestsuite("samba.unittests.talloc_keep_secret", "none",
               [os.path.join(bindir(), "default/lib/util/test_talloc_keep_secret")])