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authorLennart Poettering <lennart@poettering.net>2010-05-16 18:45:24 +0200
committerLennart Poettering <lennart@poettering.net>2010-05-16 18:45:24 +0200
commite99e38bbdcca3fe5956823bdb3d38544ccf93221 (patch)
tree109871cf2bdcad19105d55f4eea62d5495a8f614 /src/securebits.h
parente9da3678fcfc774b325dc1eaa054d0e00028a1fc (diff)
build-sys: move source files to subdirectory
Diffstat (limited to 'src/securebits.h')
-rw-r--r--src/securebits.h45
1 files changed, 45 insertions, 0 deletions
diff --git a/src/securebits.h b/src/securebits.h
new file mode 100644
index 0000000000..a5b99a3dbf
--- /dev/null
+++ b/src/securebits.h
@@ -0,0 +1,45 @@
+#ifndef _LINUX_SECUREBITS_H
+#define _LINUX_SECUREBITS_H 1
+
+/* This is minimal version of Linux' linux/securebits.h header file,
+ * which is licensed GPL2 */
+
+#define SECUREBITS_DEFAULT 0x00000000
+
+/* When set UID 0 has no special privileges. When unset, we support
+ inheritance of root-permissions and suid-root executable under
+ compatibility mode. We raise the effective and inheritable bitmasks
+ *of the executable file* if the effective uid of the new process is
+ 0. If the real uid is 0, we raise the effective (legacy) bit of the
+ executable file. */
+#define SECURE_NOROOT 0
+#define SECURE_NOROOT_LOCKED 1 /* make bit-0 immutable */
+
+/* When set, setuid to/from uid 0 does not trigger capability-"fixup".
+ When unset, to provide compatiblility with old programs relying on
+ set*uid to gain/lose privilege, transitions to/from uid 0 cause
+ capabilities to be gained/lost. */
+#define SECURE_NO_SETUID_FIXUP 2
+#define SECURE_NO_SETUID_FIXUP_LOCKED 3 /* make bit-2 immutable */
+
+/* When set, a process can retain its capabilities even after
+ transitioning to a non-root user (the set-uid fixup suppressed by
+ bit 2). Bit-4 is cleared when a process calls exec(); setting both
+ bit 4 and 5 will create a barrier through exec that no exec()'d
+ child can use this feature again. */
+#define SECURE_KEEP_CAPS 4
+#define SECURE_KEEP_CAPS_LOCKED 5 /* make bit-4 immutable */
+
+/* Each securesetting is implemented using two bits. One bit specifies
+ whether the setting is on or off. The other bit specify whether the
+ setting is locked or not. A setting which is locked cannot be
+ changed from user-level. */
+#define issecure_mask(X) (1 << (X))
+#define issecure(X) (issecure_mask(X) & current_cred_xxx(securebits))
+
+#define SECURE_ALL_BITS (issecure_mask(SECURE_NOROOT) | \
+ issecure_mask(SECURE_NO_SETUID_FIXUP) | \
+ issecure_mask(SECURE_KEEP_CAPS))
+#define SECURE_ALL_LOCKS (SECURE_ALL_BITS << 1)
+
+#endif /* !_LINUX_SECUREBITS_H */