feat: add debian12 scripts

- password_number_changed_chars.sh -> 5.3.3.2.1 - password_dictcheck_enabled.sh -> 5.3.3.2.6 - password_quality_enforced.sh -> 5.3.3.2.7 - password_quality_enforced_for_root.sh -> 5.3.3.2.8
2025-09-04 13:38:24 +02:00 · 2025-08-12 11:38:16 +02:00
parent 94f110d9b3
commit 3bbc6c435a
8 changed files with 506 additions and 0 deletions
--- a/bin/hardening/password_number_changed_chars.sh
+++ b/bin/hardening/password_number_changed_chars.sh
@@ -0,0 +1,122 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# Ensure password number of changed characters is configured (Automated)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=2
+# shellcheck disable=2034
+DESCRIPTION="Ensure password number of changed characters is configured"
+
+OPTIONS=''
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    QUALITY_VALID=1
+    DIFOK_IN_PAM=1
+
+    # order of override from strongest to latest:
+    # - /etc/pam.d/*
+    # - /etc/security/pwquality.conf
+    # - /etc/security/pwquality.conf.d/*.conf
+    # "It is recommended that settings be configured in a .conf file in the /etc/security/pwquality.conf.d/ directory for clarity, convenience, and durability."
+    expected_value=$(awk -F '=' '{print $2}' <<<"$OPTIONS")
+
+    local difok_value=""
+    DIFOK_FILE="/etc/security/pwquality.conf"
+
+    if [ -d /etc/security/pwquality.conf.d ]; then
+        if grep -E "^[[:space:]]?difok" /etc/security/pwquality.conf.d/*.conf >/dev/null 2>&1; then
+            # if set in many places, the latest one is the one used
+            DIFOK_FILE=$(grep -lE "^[[:space:]]?difok" | sort -n | tail -n 1)
+        fi
+    fi
+
+    # maybe absent from /etc/security/pwquality.conf
+    if grep -E "^[[:space:]]?difok" "$DIFOK_FILE" >/dev/null 2>&1; then
+        difok_value=$(grep -E "^[[:space:]]?difok" "$DIFOK_FILE" | awk -F '=' '{print $2}' | sed 's/\ *//g')
+        info "current 'pwquality difok' value = $difok_value"
+
+        if [ "$difok_value" -eq "$expected_value" ]; then
+            QUALITY_VALID=0
+        fi
+    fi
+
+    for file in /usr/share/pam-configs/*; do
+        if grep -Pl -- '\bpam_pwquality\.so\h+([^#\n\r]+\h+)?difok\b' "$file" >/dev/null 2>&1; then
+            DIFOK_IN_PAM=0
+            break
+        fi
+    done
+
+    if [ "$QUALITY_VALID" -eq 0 ]; then
+        ok "pwquality 'difok' value is correctly configured"
+    else
+        crit "pwquality 'difok' value is not correctly configured"
+    fi
+
+    if [ "$DIFOK_IN_PAM" -eq 0 ]; then
+        crit "pwquality 'difok' is overriden in pam configuration"
+    fi
+
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    if [ "$QUALITY_VALID" -ne 0 ]; then
+        sed -E -i '/^[[:space:]]?difok/d' "$DIFOK_FILE"
+        echo "$OPTIONS" >>"$DIFOK_FILE"
+    fi
+
+    if [ "$DIFOK_IN_PAM" -eq 0 ]; then
+        for file in /usr/share/pam-configs/*; do
+            if grep -Pl -- '\bpam_pwquality\.so\h+([^#\n\r]+\h+)?difok\b' "$file" >/dev/null 2>&1; then
+                sed -E -i 's/difok[[:space:]]?=[[:space:]]?[0-9]+//g' "$file"
+            fi
+        done
+    fi
+
+}
+
+# This function will create the config file for this check with default values
+create_config() {
+    cat <<EOF
+status=audit
+# Put your custom configuration here
+OPTIONS="difok=2"
+EOF
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_LIB_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_LIB_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "${CIS_LIB_DIR}"/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "${CIS_LIB_DIR}"/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_LIB_DIR in /etc/default/cis-hardening"
+    exit 128
+fi