1 files changed, 88 insertions, 0 deletions
diff --git a/plugins/sudoers/check_util.c b/plugins/sudoers/check_util.c
new file mode 100644
index 0000000..a676069
--- /dev/null
+++ b/plugins/sudoers/check_util.c
@@ -0,0 +1,88 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2019-2020, 2023 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <pwd.h>
+
+#include <sudoers.h>
+
+/*
+ * Check whether specified runchroot matches def_runchroot.
+ * Returns true if matched, false if not matched and -1 on error.
+ */
+int
+check_user_runchroot(const char *runchroot)
+{
+    debug_decl(check_user_runchroot, SUDOERS_DEBUG_AUTH);
+
+    if (runchroot == NULL)
+	debug_return_bool(true);
+
+    sudo_debug_printf(SUDO_DEBUG_INFO|SUDO_DEBUG_LINENO,
+	"def_runchroot %s, runchroot %s",
+	def_runchroot ? def_runchroot : "none", runchroot ? runchroot : "none");
+
+    /* User may only specify a root dir if runchroot is "*" */
+    if (def_runchroot == NULL || strcmp(def_runchroot, "*") != 0)
+	debug_return_bool(false);
+
+    free(def_runchroot);
+    if ((def_runchroot = strdup(runchroot)) == NULL) {
+	sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+	debug_return_int(-1);
+    }
+    debug_return_bool(true);
+}
+
+/*
+ * Check whether specified runcwd matches def_runcwd.
+ * Returns true if matched, false if not matched and -1 on error.
+ */
+int
+check_user_runcwd(const char *runcwd)
+{
+    debug_decl(check_user_runcwd, SUDOERS_DEBUG_AUTH);
+
+    if (runcwd == NULL)
+	debug_return_bool(true);
+
+    sudo_debug_printf(SUDO_DEBUG_INFO|SUDO_DEBUG_LINENO,
+        "def_runcwd %s, runcwd %s", def_runcwd ? def_runcwd : "none",
+        runcwd ? runcwd : "none");
+
+    /* User may only specify a cwd if runcwd is "*" */
+    if (def_runcwd == NULL || strcmp(def_runcwd, "*") != 0)
+        debug_return_bool(false);
+
+    free(def_runcwd);
+    if ((def_runcwd = strdup(runcwd)) == NULL) {
+	sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+	debug_return_int(-1);
+    }
+    debug_return_bool(true);
+}