Support for building an hardened OpenWRT

[openwrt/openwrt.git] / config / Config-build.in

diff --git a/config/Config-build.in b/config/Config-build.in
index 89cf964a8ee6f692b853ec57b134148adf49ca40..280f71923b7481074c6b7a38798274859a1b58b6 100644 (file)
--- a/config/Config-build.in
+++ b/config/Config-build.in
@@ -97,15 +97,6 @@ menu "Global build settings"
 
                  If you are unsure, select N.
 
-       config PKG_CHECK_FORMAT_SECURITY
-               bool
-               prompt "Enable gcc format-security"
-               default n
-               help
-                 Add -Wformat -Werror=format-security to the CFLAGS.  You can disable
-                 this per package by adding PKG_CHECK_FORMAT_SECURITY:=0 in the package
-                 Makefile.
-
        config PKG_BUILD_USE_JOBSERVER
                bool
                prompt "Use top-level make jobserver for packages"
@@ -216,4 +207,83 @@ menu "Global build settings"
                        bool "libstdc++"
        endchoice
 
+       comment "Hardening build options"
+
+       config PKG_CHECK_FORMAT_SECURITY
+               bool
+               prompt "Enable gcc format-security"
+               default n
+               help
+                 Add -Wformat -Werror=format-security to the CFLAGS.  You can disable
+                 this per package by adding PKG_CHECK_FORMAT_SECURITY:=0 in the package
+                 Makefile.
+
+       choice
+               prompt "User space Stack-Smashing Protection"
+               default PKG_CC_STACKPROTECTOR_NONE
+               help
+                 Enable GCC Stack Smashing Protection (SSP) for userspace applications
+               config PKG_CC_STACKPROTECTOR_NONE
+                       bool "None"
+               config PKG_CC_STACKPROTECTOR_REGULAR
+                       bool "Regular"
+                       select SSP_SUPPORT
+                       depends on KERNEL_CC_STACKPROTECTOR_REGULAR
+               config PKG_CC_STACKPROTECTOR_STRONG
+                       bool "Strong"
+                       select SSP_SUPPORT
+                       depends on GCC_VERSION_4_9_LINARO
+                       depends on KERNEL_CC_STACKPROTECTOR_STRONG
+       endchoice
+
+       choice
+               prompt "Kernel space Stack-Smashing Protection"
+               default KERNEL_CC_STACKPROTECTOR_NONE
+               help
+                 Enable GCC Stack-Smashing Protection (SSP) for the kernel
+               config KERNEL_CC_STACKPROTECTOR_NONE
+                       bool "None"
+               config KERNEL_CC_STACKPROTECTOR_REGULAR
+                       bool "Regular"
+               config KERNEL_CC_STACKPROTECTOR_STRONG
+                       depends on GCC_VERSION_4_9_LINARO
+                       bool "Strong"
+       endchoice
+
+       choice
+               prompt "Enable buffer-overflows detction (FORTIFY_SOURCE)"
+               help
+                 Enable the _FORTIFY_SOURCE macro which introduces additional
+                 checks to detect buffer-overflows in the following standard library
+                 functions: memcpy, mempcpy, memmove, memset, strcpy, stpcpy,
+                 strncpy, strcat, strncat, sprintf, vsprintf, snprintf, vsnprintf,
+                 gets.  "Conservative" (_FORTIFY_SOURCE set to 1) only introduces
+                 checks that sholdn't change the behavior of conforming programs,
+                 while "aggressive" (_FORTIFY_SOURCES set to 2) some more checking is
+                 added, but some conforming programs might fail.
+               config PKG_FORTIFY_SOURCE_NONE
+                       bool "None"
+               config PKG_FORTIFY_SOURCE_1
+                       bool "Conservative"
+               config PKG_FORTIFY_SOURCE_2
+                       bool "Aggressive"
+       endchoice
+
+       choice
+               prompt "Enable RELRO protection"
+               help
+                 Enable a link-time protection know as RELRO (Relocation Read Only)
+                 which helps to protect from certain type of exploitation techniques
+                 altering the content of some ELF sections. "Partial" RELRO makes the
+                 .dynamic section not writeable after initialization, introducing
+                 almost no performance penalty, while "full" RELRO also marks the GOT
+                 as read-only at the cost of initializing all of it at startup.
+               config PKG_RELRO_NONE
+                       bool "None"
+               config PKG_RELRO_PARTIAL
+                       bool "Partial"
+               config PKG_RELRO_FULL
+                       bool "Full"
+       endchoice
+
 endmenu