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_pam_sha512.sh

@@ -0,0 +1,95 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# Ensure password hashing algorithm is SHA-512 (Scored)
+#
+
+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 the algorithm declared in PAM for password changes is sha512 (or yescrypt for Debian 11+)"
+
+CONF_FILE="/etc/pam.d/common-password"
+# CONF_LINE is defined in _set_vars_jit below
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    _set_vars_jit
+    # Check conf file for default SHA512 hash
+    if $SUDO_CMD [ ! -r "$CONF_FILE" ]; then
+        crit "$CONF_FILE is not readable"
+    else
+        # shellcheck disable=SC2001
+        does_pattern_exist_in_file "$CONF_FILE" "$(sed 's/ /[[:space:]]+/g' <<<"$CONF_LINE")"
+        if [ "$FNRET" = 0 ]; then
+            ok "$CONF_LINE is present in $CONF_FILE"
+        else
+            crit "$CONF_LINE is not present in $CONF_FILE"
+        fi
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    _set_vars_jit
+    if $SUDO_CMD [ ! -r "$CONF_FILE" ]; then
+        crit "$CONF_FILE is not readable"
+    else
+        # shellcheck disable=SC2001
+        does_pattern_exist_in_file "$CONF_FILE" "$(sed 's/ /[[:space:]]+/g' <<<"$CONF_LINE")"
+        if [ "$FNRET" = 0 ]; then
+            ok "$CONF_LINE is present in $CONF_FILE"
+        else
+            warn "$CONF_LINE is not present in $CONF_FILE"
+            if [ "$DEB_MAJ_VER" = "sid" ] || [ "$DEB_MAJ_VER" -ge "11" ]; then
+                add_line_file_before_pattern "$CONF_FILE" "password [success=1 default=ignore] pam_unix.so yescrypt" "# pam-auth-update(8) for details."
+            else
+                add_line_file_before_pattern "$CONF_FILE" "password [success=1 default=ignore] pam_unix.so sha512" "# pam-auth-update(8) for details."
+            fi
+        fi
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# As we use DEB_MAJ_VER, which is set by constants.sh, itself sourced by main.sh below,
+# We need to call this in the subs called by main.sh when it is sourced, otherwise it would
+# either be too soon (DEB_MAJ_VER not defined) or too late (test has already been run)
+_set_vars_jit() {
+    if [ "$DEB_MAJ_VER" = "sid" ] || [ "$DEB_MAJ_VER" -ge "11" ]; then
+        CONF_LINE="^\s*password\s.+\s+pam_unix\.so\s+.*(sha512|yescrypt)" # https://github.com/ovh/debian-cis/issues/158
+    else
+        CONF_LINE="^\s*password\s.+\s+pam_unix\.so\s+.*sha512"
+    fi
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$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