From a45871bfc6a3f800548954dd364b5f53e81804ab Mon Sep 17 00:00:00 2001 From: "Yann E. MORIN" Date: Fri, 28 Dec 2012 14:07:33 +0000 Subject: [PATCH] target: add option to set the root password Add an option in the menuconfig to specify a root password. If set to empty, no root password is created; otherwise, the password is encrypted using MD5 (MD5 is not the default for crypt(3), DES-56 is, but MD5 is widely available, not-so-strong, but not-so-weak either). Add a check for 'mkpasswd' as a new dependency. [Peter: fix typo/capitilization and simplify logic] Signed-off-by: "Yann E. MORIN" Cc: Arnout Vandecappelle Cc: Thomas Petazzoni Signed-off-by: Peter Korsgaard --- support/dependencies/dependencies.sh | 9 +++++++++ system/Config.in | 21 +++++++++++++++++++++ system/system.mk | 9 +++++++++ 3 files changed, 39 insertions(+) diff --git a/support/dependencies/dependencies.sh b/support/dependencies/dependencies.sh index 7a02512c08..eb5a481848 100755 --- a/support/dependencies/dependencies.sh +++ b/support/dependencies/dependencies.sh @@ -158,6 +158,7 @@ if grep ^BR2_TOOLCHAIN_BUILDROOT=y $CONFIG_FILE > /dev/null && \ exit 1 ; fi fi + if grep -q ^BR2_PACKAGE_CLASSPATH=y $CONFIG_FILE ; then for prog in javac jar; do if ! which $prog > /dev/null ; then @@ -166,3 +167,11 @@ if grep -q ^BR2_PACKAGE_CLASSPATH=y $CONFIG_FILE ; then fi done fi + +if grep -E '^BR2_TARGET_GENERIC_ROOT_PASSWD=".+"$' $CONFIG_FILE > /dev/null 2>&1; then + if ! which mkpasswd > /dev/null 2>&1; then + /bin/echo -e "\nYou need the 'mkpasswd' utility to set the root password\n" + /bin/echo -e "(in Debian/ubuntu, 'mkpasswd' provided by the whois package)\n" + exit 1 + fi +fi diff --git a/system/Config.in b/system/Config.in index a557ea035f..f1c260a95e 100644 --- a/system/Config.in +++ b/system/Config.in @@ -12,6 +12,27 @@ config BR2_TARGET_GENERIC_ISSUE help Select system banner (/etc/issue) to be displayed at login. +config BR2_TARGET_GENERIC_ROOT_PASSWD + string "Root password" + default "" + help + Set the initial root password (in clear). It will be md5-encrypted. + + If set to empty (the default), then no root password will be set, + and root will need no password to log in. + + WARNING! WARNING! + Although pretty strong, MD5 is now an old hash function, and + suffers from some weaknesses, which makes it susceptible to attacks. + It is showing its age, so this root password should not be trusted + to properly secure any product that can be shipped to the wide, + hostile world. + + WARNING! WARNING! + The password appears in clear in the .config file, and may appear + in the build log! Avoid using a valuable password if either the + .config file or the build log may be distributed! + choice prompt "/dev management" default BR2_ROOTFS_DEVICE_CREATION_STATIC diff --git a/system/system.mk b/system/system.mk index 353d0ba1b5..7536ce649e 100644 --- a/system/system.mk +++ b/system/system.mk @@ -1,5 +1,9 @@ TARGET_GENERIC_HOSTNAME:=$(call qstrip,$(BR2_TARGET_GENERIC_HOSTNAME)) TARGET_GENERIC_ISSUE:=$(call qstrip,$(BR2_TARGET_GENERIC_ISSUE)) +TARGET_GENERIC_ROOT_PASSWD:=$(call qstrip,$(BR2_TARGET_GENERIC_ROOT_PASSWD)) +ifneq ($(TARGET_GENERIC_ROOT_PASSWD),) +TARGET_GENERIC_ROOT_PASSWD_HASH=$(shell mkpasswd -m md5 "$(TARGET_GENERIC_ROOT_PASSWD)") +endif TARGET_GENERIC_GETTY:=$(call qstrip,$(BR2_TARGET_GENERIC_GETTY_PORT)) TARGET_GENERIC_GETTY_BAUDRATE:=$(call qstrip,$(BR2_TARGET_GENERIC_GETTY_BAUDRATE)) TARGET_GENERIC_GETTY_TERM:=$(call qstrip,$(BR2_TARGET_GENERIC_GETTY_TERM)) @@ -14,6 +18,9 @@ target-generic-issue: mkdir -p $(TARGET_DIR)/etc echo "$(TARGET_GENERIC_ISSUE)" > $(TARGET_DIR)/etc/issue +target-root-passwd: + $(SED) 's,^root:[^:]*:,root:$(TARGET_GENERIC_ROOT_PASSWD_HASH):,' $(TARGET_DIR)/etc/shadow + target-generic-getty-busybox: $(SED) '/# GENERIC_SERIAL$$/s~^.*#~$(TARGET_GENERIC_GETTY)::respawn:/sbin/getty -L $(TARGET_GENERIC_GETTY) $(TARGET_GENERIC_GETTY_BAUDRATE) $(TARGET_GENERIC_GETTY_TERM) #~' \ $(TARGET_DIR)/etc/inittab @@ -40,6 +47,8 @@ ifneq ($(TARGET_GENERIC_ISSUE),) TARGETS += target-generic-issue endif +TARGETS += target-root-passwd + ifeq ($(BR2_ROOTFS_SKELETON_DEFAULT),y) ifeq ($(BR2_PACKAGE_SYSVINIT),y) TARGETS += target-generic-getty-sysvinit -- 2.30.2