Damcava35/set version (#257)

* feat: add "--set-version" option

This feature will allow to chose a specific cis version to run, like debian 11 or debian 12

* chore: configure current repository as a version

And use it as default version.

To this end, the scripts in bin/hardening have been made generic by removing the associated recommendation number.
Only impact is if you are used to execute scripts directly from bin/hardening.
In this case, please use the "bin/hardening.sh" wrapper as intended.

I had to rename 2.3.1_disable_nis.sh to uninstall_nis.sh, as it was conflicting with 2.3.1_disable_nis.sh

Also, there was a doublon between 1.1.1.8_disable_cramfs.sh and 99.1.1.1_disable_cramfs.sh ; the former was kept

* chore: remove CIS recommendation numbers from bin/hardening scripts

* fix: some tests are failing

find_ungrouped_files.sh and find_unowned_files.sh tests can not be executed multiple times:
- test repository is not cleaned
- configuration is updated multiple times

Those tests are also failing, because:
- the sed to change the status in the configuration was also changing the test folder path.
- missing /proc in EXCLUDED paths
- the EXCLUDED configuration doesn't have the correct format for egrep

---------

Co-authored-by: Damien Cavagnini <damien.cavagnini@corp.ovh.com>

bin/hardening/acc_shadow_sha512.sh

@@ -0,0 +1,93 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# OVH Security audit
+#
+
+#
+# Check that passwords in /etc/shadow are sha512crypt (or yescrypt for Debian 11+) hashed and salted
+#
+
+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="Check that passwords in /etc/shadow are sha512crypt (or yescrypt for Debian 11+) hashed and salted"
+FILE="/etc/shadow"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    # Review shadow file for existing passwords
+    pw_found=""
+    users_reviewed=""
+    if $SUDO_CMD [ ! -r "$FILE" ]; then
+        crit "$FILE is not readable"
+        return
+    fi
+    for line in $($SUDO_CMD cut -d ":" -f 1,2 /etc/shadow); do
+        users_reviewed+="$line "
+        user=$(echo "$line" | cut -d ":" -f 1)
+        passwd=$(echo "$line" | cut -d ":" -f 2)
+        if [[ $passwd = '!' || $passwd = '*' ]]; then
+            continue
+        elif [[ $passwd =~ ^!.*$ ]]; then
+            pw_found+="$user "
+            ok "User $user has a disabled password."
+        # yescrypt: Check password against $y$<salt>$<base64>
+        elif [ "$DEB_MAJ_VER" -ge "11" ] && [[ $passwd =~ ^\$y\$[./A-Za-z0-9]+\$[./A-Za-z0-9]{,86}\$[./A-Za-z0-9]{43} ]]; then
+            pw_found+="$user "
+            ok "User $user has suitable yescrypt hashed password."
+        # sha512: Check password against $6$<salt>$<base64>, see `man 3 crypt`
+        elif [[ $passwd =~ ^\$6(\$rounds=[0-9]+)?\$[a-zA-Z0-9./]{2,16}\$[a-zA-Z0-9./]{86}$ ]]; then
+            pw_found+="$user "
+            ok "User $user has suitable sha512crypt hashed password."
+        else
+            pw_found+="$user "
+            if [ "$DEB_MAJ_VER" -ge "11" ]; then
+                crit "User $user has a password that is not sha512crypt nor yescrypt hashed."
+            else
+                crit "User $user has a password that is not sha512crypt hashed."
+            fi
+        fi
+    done
+    if [[ -z "$users_reviewed" ]]; then
+        crit "No users were reviewed in $FILE !"
+        return
+    fi
+    if [[ -z "$pw_found" ]]; then
+        ok "There is no password in $FILE"
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    :
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$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