Imported Upstream version 4.1.5.1upstream/4.1.5.1

1 files changed, 103 insertions, 0 deletions

diff --git a/lib/selinux.c b/lib/selinux.c
new file mode 100644
index 00000000..d7513298
--- /dev/null
+++ b/lib/selinux.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2011       , Peter Vrabec <pvrabec@redhat.com>
+ * 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 copyright holders or contributors may not be used to
+ *    endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
+ * HOLDERS 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.
+ */
+
+#include <config.h>
+
+#ifdef WITH_SELINUX
+
+#include "defines.h"
+
+#include <selinux/selinux.h>
+#include "prototypes.h"
+
+
+static bool selinux_checked = false;
+static bool selinux_enabled;
+
+/*
+ * set_selinux_file_context - Set the security context before any file or
+ *                            directory creation.
+ *
+ *	set_selinux_file_context () should be called before any creation
+ *	of file, symlink, directory, ...
+ *
+ *	Callers may have to Reset SELinux to create files with default
+ *	contexts with reset_selinux_file_context
+ */
+int set_selinux_file_context (const char *dst_name)
+{
+	/*@null@*/security_context_t scontext = NULL;
+
+	if (!selinux_checked) {
+		selinux_enabled = is_selinux_enabled () > 0;
+		selinux_checked = true;
+	}
+
+	if (selinux_enabled) {
+		/* Get the default security context for this file */
+		if (matchpathcon (dst_name, 0, &scontext) < 0) {
+			if (security_getenforce () != 0) {
+				return 1;
+			}
+		}
+		/* Set the security context for the next created file */
+		if (setfscreatecon (scontext) < 0) {
+			if (security_getenforce () != 0) {
+				return 1;
+			}
+		}
+		freecon (scontext);
+	}
+	return 0;
+}
+
+/*
+ * reset_selinux_file_context - Reset the security context to the default
+ *                              policy behavior
+ *
+ *	reset_selinux_file_context () should be called after the context
+ *	was changed with set_selinux_file_context ()
+ */
+int reset_selinux_file_context (void)
+{
+	if (!selinux_checked) {
+		selinux_enabled = is_selinux_enabled () > 0;
+		selinux_checked = true;
+	}
+	if (selinux_enabled) {
+		if (setfscreatecon (NULL) != 0) {
+			return 1;
+		}
+	}
+	return 0;
+}
+
+#else				/* !WITH_SELINUX */
+extern int errno;		/* warning: ANSI C forbids an empty source file */
+#endif				/* !WITH_SELINUX */