[Buildroot] [PATCH 2/2] target: add different methods to encode the root password
Yann E. MORIN
yann.morin.1998 at free.fr
Sat Dec 29 00:07:34 UTC 2012
The password can be encoded in different ways (from the weakest
to the strongest): des, md5, sha-256, sha-512
Add a choice entry to select the method, defaulting to 'md5'.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
---
system/Config.in | 46 ++++++++++++++++++++++++++++++++++++++++++++++
system/system.mk | 3 ++-
2 files changed, 48 insertions(+), 1 deletions(-)
diff --git a/system/Config.in b/system/Config.in
index deead86..2c90e8a 100644
--- a/system/Config.in
+++ b/system/Config.in
@@ -34,6 +34,52 @@ config BR2_TARGET_GENERIC_ROOT_PASSWD
.config file or the build log may be distributed!
choice
+ bool "root password encoding"
+ depends on BR2_TARGET_GENERIC_ROOT_PASSWD != ""
+ default BR2_TARGET_GENERIC_ROOT_PASSWD_MD5
+
+config BR2_TARGET_GENERIC_ROOT_PASSWD_DES
+ bool "des"
+ help
+ Use standard 56-bit DES-based crypt(3).
+
+ Old, wildly available, but also the weakest.
+
+config BR2_TARGET_GENERIC_ROOT_PASSWD_MD5
+ bool "md5"
+ help
+ Use MD5 to encode the password.
+
+ The default, wildly available, and pretty good.
+
+config BR2_TARGET_GENERIC_ROOT_PASSWD_SHA256
+ bool "sha-256"
+ help
+ Use SHA256 to encode the password.
+
+ Very strong, but not ubiquitous, although available in glibc
+ for some time now. Choose only if you are sure your C library
+ understands SHA256 passwords.
+
+config BR2_TARGET_GENERIC_ROOT_PASSWD_SHA512
+ bool "sha-512"
+ help
+ Use SHA512 to encode the password.
+
+ Extremely strong, but not ubiquitous, although available in glibc
+ for some time now. Choose only if you are sure your C library
+ understands SHA512 passwords.
+
+endchoice # root passwd encoding
+
+config BR2_TARGET_GENERIC_ROOT_PASSWD_METHOD
+ string
+ default "des" if BR2_TARGET_GENERIC_ROOT_PASSWD_DES
+ default "md5" if BR2_TARGET_GENERIC_ROOT_PASSWD_MD5
+ default "sha-256" if BR2_TARGET_GENERIC_ROOT_PASSWD_SHA256
+ default "sha-512" if BR2_TARGET_GENERIC_ROOT_PASSWD_SHA512
+
+choice
prompt "/dev management"
default BR2_ROOTFS_DEVICE_CREATION_STATIC
diff --git a/system/system.mk b/system/system.mk
index a23feef..f5a8310 100644
--- a/system/system.mk
+++ b/system/system.mk
@@ -1,6 +1,7 @@
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))
+TARGET_GENERIC_ROOT_PASSWD_METHOD:=$(call qstrip,$(BR2_TARGET_GENERIC_ROOT_PASSWD_METHOD))
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))
@@ -19,7 +20,7 @@ target-no-root-passwd:
$(SED) "s/^root:[^:]*:/root::/" $(TARGET_DIR)/etc/shadow
target-root-passwd:
- root_passwd="$$( mkpasswd -m md5 "$(TARGET_GENERIC_ROOT_PASSWD)" )"; \
+ root_passwd="$$( mkpasswd -m "$(TARGET_GENERIC_ROOT_PASSWD_METHOD)" "$(TARGET_GENERIC_ROOT_PASSWD)" )"; \
$(SED) "s,^root::,root:$${root_passwd}:," $(TARGET_DIR)/etc/shadow
target-generic-getty-busybox:
--
1.7.2.5
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