meta: image-account-extension: allow clear-text-passwords

When setting a password, having to always do so in encrypted form seems
a little overkill. We often see the clear-text as comment above the
encrypted version anyways. Allowing to set the password as clear-text
makes it more obvious that things might not be super-secure, while
making a layer more readable ... say you are looking for the password an
image asks for.

Signed-off-by: Henning Schild <henning.schild@siemens.com>

doc/user_manual.md

@@ -633,6 +633,7 @@ The `USERS` and `USER_<username>` variable works similar to the `GROUPS` and `GR
    - `create-home` - `useradd` will be called with `-m` to force creation of the users home directory.
    - `system` - `useradd` will be called with `--system`.
    - `allow-empty-password` - Even if the `password` flag is empty, it will still be set. This results in a login without password.
+   - `clear-text-password` - The `password` flag of the given user contains a clear-text password and not an encrypted version of it.
 
 #### Home directory contents prefilling
 

meta-isar/conf/local.conf.sample

@@ -217,5 +217,8 @@ USER_isar[home] = "/var/lib/isar"
 USER_isar[comment] = "My isar user"
 USER_isar[flags] = "system create-home"
 
+USER_isar[password] = "isar"
+USER_isar[flags] += "clear-text-password"
+
 # Uncomment the below line to debug WIC.
 # WIC_CREATE_EXTRA_ARGS += "-D"

meta/classes/image-account-extension.bbclass

@@ -8,7 +8,7 @@
 USERS ??= ""
 
 #USERS += "root"
-#USER_root[password] = "" # Encrypted password
+#USER_root[password] = "" # Encrypted password, or clear-text when [flags] = "clear-text-password"
 #USER_root[expire] = ""
 #USER_root[inactive] = ""
 #USER_root[uid] = ""
@@ -17,7 +17,7 @@ USERS ??= ""
 #USER_root[home] = "/home/root"
 #USER_root[shell] = "/bin/sh"
 #USER_root[groups] = "audio video"
-#USER_root[flags] = "no-create-home create-home system allow-empty-password"
+#USER_root[flags] = "no-create-home create-home system allow-empty-password clear-text-password"
 
 GROUPS ??= ""
 
@@ -252,8 +252,12 @@ image_configure_accounts() {
 
         # Set password:
         if [ -n "$password" -o "${flags}" != "${flags%*,allow-empty-password,*}" ]; then
+            chpasswd_args="-e"
+            if [ "${flags}" != "${flags%*,clear-text-password,*}" ]; then
+                chpasswd_args=""
+            fi
             printf '%s:%s' "$name" "$password" | sudo chroot '${ROOTFSDIR}' \
-                /usr/sbin/chpasswd -e
+                /usr/sbin/chpasswd $chpasswd_args
         fi
     done
 }