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authorYann E. MORIN <yann.morin.1998@free.fr>2012-12-28 14:07:33 (GMT)
committer Peter Korsgaard <jacmet@sunsite.dk>2012-12-30 17:00:16 (GMT)
commita45871bfc6a3f800548954dd364b5f53e81804ab (patch)
treec096d3defbcb6a8abfc424f2a24f6f14ebdbea47
parentaa5d13568d193b741d4c20fb8670a3f7334efdcb (diff)
downloadbuildroot-a45871bfc6a3f800548954dd364b5f53e81804ab.tar.gz
buildroot-a45871bfc6a3f800548954dd364b5f53e81804ab.tar.bz2
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" <yann.morin.1998@free.fr> Cc: Arnout Vandecappelle <arnout@mind.be> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
-rwxr-xr-xsupport/dependencies/dependencies.sh9
-rw-r--r--system/Config.in21
-rw-r--r--system/system.mk9
3 files changed, 39 insertions, 0 deletions
diff --git a/support/dependencies/dependencies.sh b/support/dependencies/dependencies.sh
index 7a02512..eb5a481 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 $CONFIG_FILE ; then
fi
done
fi
+
+if grep -E '^BR2_TARGET_GENERIC_ROOT_PASSWD=".+"$' $CONFIG_FILE > /dev/null 2>&1; then
+ if ! which mkpasswd > /dev/null 2>&1; then
+ /bin/echo -e "\nYou need the 'mkpasswd' utility to set the root password\n"
+ /bin/echo -e "(in Debian/ubuntu, 'mkpasswd' provided by the whois package)\n"
+ exit 1
+ fi
+fi
diff --git a/system/Config.in b/system/Config.in
index a557ea0..f1c260a 100644
--- a/system/Config.in
+++ b/system/Config.in
@@ -12,6 +12,27 @@ config BR2_TARGET_GENERIC_ISSUE
help
Select system banner (/etc/issue) to be displayed at login.
+config BR2_TARGET_GENERIC_ROOT_PASSWD
+ string "Root password"
+ default ""
+ help
+ Set the initial root password (in clear). It will be md5-encrypted.
+
+ If set to empty (the default), then no root password will be set,
+ and root will need no password to log in.
+
+ WARNING! WARNING!
+ Although pretty strong, MD5 is now an old hash function, and
+ suffers from some weaknesses, which makes it susceptible to attacks.
+ It is showing its age, so this root password should not be trusted
+ to properly secure any product that can be shipped to the wide,
+ hostile world.
+
+ WARNING! WARNING!
+ The password appears in clear in the .config file, and may appear
+ in the build log! Avoid using a valuable password if either the
+ .config file or the build log may be distributed!
+
choice
prompt "/dev management"
default BR2_ROOTFS_DEVICE_CREATION_STATIC
diff --git a/system/system.mk b/system/system.mk
index 353d0ba..7536ce6 100644
--- a/system/system.mk
+++ b/system/system.mk
@@ -1,5 +1,9 @@
TARGET_GENERIC_HOSTNAME:=$(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