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https://github.com/ovh/debian-cis.git
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de295b3a77
* Revert "fix: clean obsolete check 99.5.4.5.1, now handled by 5.3.4 (#215)"
This reverts commit 670c8c62f5.
We still want to verify the preexisting hashes in /etc/shadow,
even if the PAM configuration is correct for new passwords (5.3.4).
* Adapt 5.3.4, 99.5.4.5.1 and 99.5.4.5.2 to yescrypt
97 lines
3.2 KiB
Bash
Executable File
97 lines
3.2 KiB
Bash
Executable File
#!/bin/bash
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# run-shellcheck
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#
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# CIS Debian Hardening
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#
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#
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# 5.3.4 Ensure password hashing algorithm is SHA-512 (Scored)
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#
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set -e # One error, it's over
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set -u # One variable unset, it's over
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# shellcheck disable=2034
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HARDENING_LEVEL=2
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# shellcheck disable=2034
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DESCRIPTION="Check that the algorithm declared in PAM for password changes is sha512 (or yescrypt for Debian 11+)"
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CONF_FILE="/etc/pam.d/common-password"
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# CONF_LINE is defined in _set_vars_jit below
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# This function will be called if the script status is on enabled / audit mode
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audit() {
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_set_vars_jit
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# Check conf file for default SHA512 hash
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if $SUDO_CMD [ ! -r "$CONF_FILE" ]; then
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crit "$CONF_FILE is not readable"
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else
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# shellcheck disable=SC2001
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does_pattern_exist_in_file "$CONF_FILE" "$(sed 's/ /[[:space:]]+/g' <<<"$CONF_LINE")"
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if [ "$FNRET" = 0 ]; then
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ok "$CONF_LINE is present in $CONF_FILE"
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else
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crit "$CONF_LINE is not present in $CONF_FILE"
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fi
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply() {
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_set_vars_jit
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if $SUDO_CMD [ ! -r "$CONF_FILE" ]; then
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crit "$CONF_FILE is not readable"
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else
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# shellcheck disable=SC2001
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does_pattern_exist_in_file "$CONF_FILE" "$(sed 's/ /[[:space:]]+/g' <<<"$CONF_LINE")"
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if [ "$FNRET" = 0 ]; then
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ok "$CONF_LINE is present in $CONF_FILE"
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else
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warn "$CONF_LINE is not present in $CONF_FILE"
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if [ "$DEB_MAJ_VER" -ge "11" ]; then
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add_line_file_before_pattern "$CONF_FILE" "password [success=1 default=ignore] pam_unix.so yescrypt" "# pam-auth-update(8) for details."
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else
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add_line_file_before_pattern "$CONF_FILE" "password [success=1 default=ignore] pam_unix.so sha512" "# pam-auth-update(8) for details."
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fi
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fi
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fi
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# As we use DEB_MAJ_VER, which is set by constants.sh, itself sourced by main.sh below,
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# We need to call this in the subs called by main.sh when it is sourced, otherwise it would
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# either be too soon (DEB_MAJ_VER not defined) or too late (test has already been run)
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_set_vars_jit() {
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if [ "$DEB_MAJ_VER" -ge "11" ]; then
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CONF_LINE="^\s*password\s.+\s+pam_unix\.so\s+.*(sha512|yescrypt)" # https://github.com/ovh/debian-cis/issues/158
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else
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CONF_LINE="^\s*password\s.+\s+pam_unix\.so\s+.*sha512"
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fi
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unset -f _set_vars_jit
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_LIB_DIR" ]; then
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echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
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echo "Cannot source CIS_LIB_DIR variable, aborting."
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exit 128
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fi
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# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
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if [ -r "${CIS_LIB_DIR}"/main.sh ]; then
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# shellcheck source=../../lib/main.sh
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. "${CIS_LIB_DIR}"/main.sh
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else
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echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_LIB_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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