Properly manage folder/file permissions

scripts/install

@@ -113,6 +113,14 @@ ynh_script_progression --message="Installing dependencies..." --time --weight=1
 
 ynh_install_app_dependencies $pkg_dependencies
 
+#=================================================
+# CREATE DEDICATED USER
+#=================================================
+ynh_script_progression --message="Configuring system user..." --time --weight=1
+
+# Create a system user
+ynh_system_user_create --username=$app --home_dir="$final_path"
+
 #=================================================
 # CREATE A MYSQL DATABASE
 #=================================================
@@ -145,6 +153,17 @@ ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 # Download, check integrity, uncompress and patch the source from app.src
 ynh_setup_source --dest_dir="$final_path"
 
+# FIXME: this should be managed by the core in the future
+# Here, as a packager, you may have to tweak the ownerhsip/permissions
+# such that the appropriate users (e.g. maybe www-data) can access
+# files in some cases.
+# But FOR THE LOVE OF GOD, do not allow r/x for "others" on the entire folder -
+# this will be treated as a security issue.
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R root: "$final_path"
+chown root:$app "$final_path"
+
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
@@ -155,14 +174,6 @@ ynh_script_progression --message="Configuring NGINX web server..." --time --weig
 # Create a dedicated NGINX config
 ynh_add_nginx_config
 
-#=================================================
-# CREATE DEDICATED USER
-#=================================================
-ynh_script_progression --message="Configuring system user..." --time --weight=1
-
-# Create a system user
-ynh_system_user_create --username=$app
-
 #=================================================
 # PHP-FPM CONFIGURATION
 #=================================================
@@ -246,6 +257,12 @@ ynh_permission_update --permission="main" --remove="visitors"
 
 ynh_add_config --template="some_config_file" --destination="$final_path/some_config_file"
 
+# FIXME: this should be handled by the core in the future
+# You may need to use chmod 600 instead of 400,
+# for example if the app is expected to be able to modify its own config
+chmod 400
+chown $app:$app "$final_path/some_config_file"
+
 ### For more complex cases where you want to replace stuff using regexes,
 ### you shoud rely on ynh_replace_string (which is basically a wrapper for sed)
 ### When doing so, you also need to manually call ynh_store_file_checksum
@@ -255,17 +272,6 @@ ynh_add_config --template="some_config_file" --destination="$final_path/some_con
 
 #=================================================
 # GENERIC FINALIZATION
-#=================================================
-# SECURE FILES AND DIRECTORIES
-#=================================================
-
-### For security reason, any app should set the permissions to root: before anything else.
-### Then, if write authorization is needed, any access should be given only to directories
-### that really need such authorization.
-
-# Set permissions to app files
-chown -R root: $final_path
-
 #=================================================
 # SETUP LOGROTATE
 #=================================================

scripts/restore

@@ -53,6 +53,14 @@ test ! -d $final_path \
 
 ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 
+#=================================================
+# RECREATE THE DEDICATED USER
+#=================================================
+ynh_script_progression --message="Recreating the dedicated system user..." --time --weight=1
+
+# Create the dedicated user (if not existing)
+ynh_system_user_create --username=$app --home_dir="$final_path"
+
 #=================================================
 # RESTORE THE APP MAIN DIR
 #=================================================
@@ -60,20 +68,16 @@ ynh_script_progression --message="Restoring the app main directory..." --time --
 
 ynh_restore_file --origin_path="$final_path"
 
-#=================================================
+# FIXME: this should be managed by the core in the future
-# RECREATE THE DEDICATED USER
+# Here, as a packager, you may have to tweak the ownerhsip/permissions
-#=================================================
+# such that the appropriate users (e.g. maybe www-data) can access
-ynh_script_progression --message="Recreating the dedicated system user..." --time --weight=1
+# files in some cases.
-
+# But FOR THE LOVE OF GOD, do not allow r/x for "others" on the entire folder -
-# Create the dedicated user (if not existing)
+# this will be treated as a security issue.
-ynh_system_user_create --username=$app
+chmod 750 "$final_path"
-
+chmod -R o-rwx "$final_path"
-#=================================================
+chown -R root: "$final_path"
-# RESTORE USER RIGHTS
+chown root:$app "$final_path"
-#=================================================
-
-# Restore permissions on app files
-chown -R root: $final_path
 
 #=================================================
 # RESTORE THE PHP-FPM CONFIGURATION

scripts/upgrade

@@ -101,6 +101,14 @@ ynh_script_progression --message="Stopping a systemd service..." --time --weight
 
 ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"
 
+#=================================================
+# CREATE DEDICATED USER
+#=================================================
+ynh_script_progression --message="Making sure dedicated system user exists..." --time --weight=1
+
+# Create a dedicated user (if not existing)
+ynh_system_user_create --username=$app --home_dir="$final_path"
+
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
@@ -113,6 +121,17 @@ then
 	ynh_setup_source --dest_dir="$final_path"
 fi
 
+# FIXME: this should be managed by the core in the future
+# Here, as a packager, you may have to tweak the ownerhsip/permissions
+# such that the appropriate users (e.g. maybe www-data) can access
+# files in some cases.
+# But FOR THE LOVE OF GOD, do not allow r/x for "others" on the entire folder -
+# this will be treated as a security issue.
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R root: "$final_path"
+chown root:$app "$final_path"
+
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
@@ -128,14 +147,6 @@ ynh_script_progression --message="Upgrading dependencies..." --time --weight=1
 
 ynh_install_app_dependencies $pkg_dependencies
 
-#=================================================
-# CREATE DEDICATED USER
-#=================================================
-ynh_script_progression --message="Making sure dedicated system user exists..." --time --weight=1
-
-# Create a dedicated user (if not existing)
-ynh_system_user_create --username=$app
-
 #=================================================
 # PHP-FPM CONFIGURATION
 #=================================================
@@ -169,6 +180,12 @@ ynh_add_systemd_config
 
 ynh_add_config --template="some_config_file" --destination="$final_path/some_config_file"
 
+# FIXME: this should be handled by the core in the future
+# You may need to use chmod 600 instead of 400,
+# for example if the app is expected to be able to modify its own config
+chmod 400
+chown $app:$app "$final_path/some_config_file"
+
 ### For more complex cases where you want to replace stuff using regexes,
 ### you shoud rely on ynh_replace_string (which is basically a wrapper for sed)
 ### When doing so, you also need to manually call ynh_store_file_checksum