Adapt sysctl template for bootable containers

docs/templates/template_reference.md

@@ -934,7 +934,7 @@ The selected value can be changed in the profile (consult the actual variable fo
     the remediation scripts will set the variable with correct value to a drop-in file in
     `/etc/sysctl.d/var_name.conf` file.
 
--   Languages: Ansible, Bash, OVAL
+-   Languages: Ansible, Bash, OVAL, SCE
 
 #### systemd_dropin_configuration
 - checks if a Systemd-style configuration exists either in the main file or in any file within specified dropin directory.

shared/templates/sysctl/bash.template

@@ -41,7 +41,9 @@ SYSCONFIG_FILE="/etc/sysctl.conf"
 #
 # Set runtime for {{{ SYSCTLVAR }}}
 #
-/sbin/sysctl -q -n -w {{{ SYSCTLVAR }}}="$sysctl_{{{ SYSCTLID }}}_value"
+if {{{ bash_not_bootc_build() }}} ; then
+    /sbin/sysctl -q -n -w {{{ SYSCTLVAR }}}="$sysctl_{{{ SYSCTLID }}}_value"
+fi
 
 #
 # If {{{ SYSCTLVAR }}} present in /etc/sysctl.conf, change value to appropriate value
@@ -57,7 +59,9 @@ sed -i "/^$SYSCONFIG_VAR/d" /etc/sysctl.conf
 #
 # Set runtime for {{{ SYSCTLVAR }}}
 #
-/sbin/sysctl -q -n -w {{{ SYSCTLVAR }}}="{{{ SYSCTLVAL }}}"
+if {{{ bash_not_bootc_build() }}} ; then
+    /sbin/sysctl -q -n -w {{{ SYSCTLVAR }}}="{{{ SYSCTLVAL }}}"
+fi
 
 #
 # If {{{ SYSCTLVAR }}} present in /etc/sysctl.conf, change value to "{{{ SYSCTLVAL }}}"

shared/templates/sysctl/oval.template

@@ -20,7 +20,7 @@
     <ind:pattern operation="pattern match">^[\s]*{{{ SYSCTLVAR }}}[\s]*=[\s]*(.*\S)[\s]*$</ind:pattern>
     <ind:instance datatype="int" operation="greater than or equal">1</ind:instance>
 {{%- endmacro -%}}
-{{%- if "P" in FLAGS -%}}
+{{%- if IPV6 == "false" -%}}
 
 <def-group>
   <definition class="compliance" id="{{{ rule_id }}}" version="3">
@@ -36,7 +36,7 @@
   </definition>
 </def-group>
 
-{{%- elif "I" in FLAGS -%}}
+{{%- else -%}}
 
 <def-group>
   <definition class="compliance" id="{{{ rule_id }}}" version="4">
@@ -62,7 +62,6 @@
 </def-group>
 
 {{%- endif %}}
-{{%- if "R" in FLAGS -%}}
 
 {{% if CHECK_RUNTIME == "true" %}}
 <def-group>
@@ -121,8 +120,6 @@
 </def-group>
 {{% endif %}}
 
-{{%- endif -%}}
-{{%- if "S" in FLAGS -%}}
 
 <def-group>
   <definition class="compliance" id="{{{ rule_id }}}_static" version="3">
@@ -269,4 +266,3 @@
 {{% endfor %}}
 {{% endif %}}
 </def-group>
-{{%- endif -%}}

shared/templates/sysctl/sce-bash.template

@@ -0,0 +1,101 @@
+#!/usr/bin/env bash
+# check-import = stdout
+{{% if SYSCTLVAL == "" %}}
+# check-export = sysctl_{{{ SYSCTLID }}}_value=sysctl_{{{ SYSCTLID }}}_value
+{{% endif %}}
+
+{{% if product in [ "ol7", "ol8", "ol9", "rhcos4", "rhel8", "rhel9", "rhel10", "ubuntu2004", "ubuntu2204"] %}}
+FILES_NOT_MANAGED_BY_PACKAGES=("/etc/sysctl.conf" "/etc/sysctl.d/*.conf" "/usr/local/lib/sysctl.d/*.conf" "/run/sysctl.d/*.conf")
+{{% else %}}
+FILES_NOT_MANAGED_BY_PACKAGES=("/etc/sysctl.conf" "/etc/sysctl.d/*.conf" "/lib/sysctl.d/*.conf" "/usr/local/lib/sysctl.d/*.conf" "/run/sysctl.d/*.conf")
+{{% endif %}}
+FILES_MANAGED_BY_PACKAGES=("/usr/lib/sysctl.d/*.conf")
+
+function pass_if_set_correctly()
+{
+    local filelist="$1"
+    local regex="$2"
+    local expected_value="$3"
+    local found=0
+    for files in $filelist ; do
+        [[ -e "$files" ]] || continue
+        found_value=$(grep -P "$regex" $files | sed -E "s/$regex/\1/")
+        if [[ -n "$found_value" ]] ; then
+            if [[ "$found_value" == "$expected_value" ]] ; then
+                found=1
+            else
+                return 1
+            fi
+        fi
+    done
+    if [[ $found == 1 ]] ; then
+        return 0
+    fi
+    return 1
+}
+
+function pass_if_missing()
+{
+    local filelist="$1"
+    local regex="$2"
+    for files in $filelist ; do
+        [[ -e "$files" ]] || continue
+        if grep -P "$regex"  $files ; then
+            return 1
+        fi
+    done
+    return 0
+}
+
+function check_sysctl_configuration()
+{
+    local sysctlvar="$1"
+    local expected_value="$2"
+
+    regex="^\s*$sysctlvar\s*=\s*(.*)\s*"
+
+    # kernel static parameter $sysctlvar set to $sysctlvar in sysctl files not managed by packages
+    pass_if_set_correctly "${FILES_NOT_MANAGED_BY_PACKAGES[*]}" "$regex" "$expected_value"
+    set_correctly_in_not_managed="$?"
+
+    # kernel static parameter $sysctlvar missing in sysctl files not managed by packages
+    pass_if_missing "${FILES_NOT_MANAGED_BY_PACKAGES[*]}" "$regex"
+    missing_in_not_managed="$?"
+
+    # kernel static parameter $sysctlvar set to $sysctlval in sysctl files managed by packages
+    pass_if_set_correctly "${FILES_MANAGED_BY_PACKAGES[*]}" "$regex" "$expected_value"
+    set_correctly_in_managed="$?"
+
+    if [[ "$set_correctly_in_not_managed" == 0 || ( "$missing_in_not_managed" == 0 && "$set_correctly_in_managed" == 0 ) ]] ; then
+        return 0
+    fi
+    return 1
+}
+
+{{% if IPV6 == "true" -%}}
+# pass if IPv6 is disabled
+check_sysctl_configuration "net.ipv6.conf.all.disable_ipv6" "1"
+if [[ $? == 0 ]] ; then
+    exit $XCCDF_RESULT_PASS
+fi
+{{% endif %}}
+
+{{% if SYSCTLVAL is string %}}
+{{% if SYSCTLVAL == "" -%}}
+expected_value="$XCCDF_VALUE_sysctl_{{{ SYSCTLID }}}_value"
+{{%- else -%}}
+expected_value="{{{ SYSCTLVAL }}}"
+{{%- endif %}}
+check_sysctl_configuration "{{{ SYSCTLVAR }}}" "$expected_value"
+if [[ $? == 0 ]] ; then
+    exit $XCCDF_RESULT_PASS
+fi
+{{% elif SYSCTLVAL is sequence %}}
+{{% for x in SYSCTLVAL %}}
+check_sysctl_configuration "{{{ SYSCTLVAR }}}" "{{{ x }}}"
+if [[ $? == 0 ]] ; then
+    exit $XCCDF_RESULT_PASS
+fi
+{{% endfor %}}
+{{% endif %}}
+exit $XCCDF_RESULT_FAIL

shared/templates/sysctl/template.py

@@ -5,10 +5,10 @@ def preprocess(data, lang):
     data["sysctlid"] = ssg.utils.escape_id(data["sysctlvar"])
     if not data.get("sysctlval"):
         data["sysctlval"] = ""
-    ipv6_flag = "P"
     if data["sysctlid"].find("ipv6") >= 0:
-        ipv6_flag = "I"
-    data["flags"] = "SR" + ipv6_flag
+        data["ipv6"] = "true"
+    else:
+        data["ipv6"] = "false"
     if "operation" not in data:
         data["operation"] = "equals"
     if isinstance(data["sysctlval"], list) and len(data["sysctlval"]) == 0:

shared/templates/sysctl/template.yml

@@ -2,3 +2,4 @@ supported_languages:
   - ansible
   - bash
   - oval
+  - sce-bash