Marc S. Weidner
ae0bd5f3e9
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
137 lines
5.4 KiB
Bash
137 lines
5.4 KiB
Bash
#!/bin/bash
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-10-11; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
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# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
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# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-FileType: SOURCE
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# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
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# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
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# SPDX-PackageName: CISS.debian.live.builder
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# SPDX-Security-Contact: security@coresecret.eu
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### NIST recommends at least eight characters but advises longer passphrases (e.g., 12-64) for increased security.
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### NIST SP 800-63B, https://pages.nist.gov/800-63-3/sp800-63b.html
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set -Ceuo pipefail
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printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
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# shellcheck disable=SC2155
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declare -r VAR_DATE="$(date +%F)"
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cp -a /etc/security/pwquality.conf /root/.ciss/cdlb/backup/pwquality.conf.bak
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chmod 0644 /root/.ciss/cdlb/backup/pwquality.conf.bak
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cat << EOF >| /etc/security/pwquality.conf
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: ${VAR_DATE}; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
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# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
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# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-FileType: SOURCE
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# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
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# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
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# SPDX-PackageName: CISS.debian.live.builder
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# SPDX-Security-Contact: security@coresecret.eu
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### Current recommendations for '/etc/security/pwquality.conf' based on common best practices,
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### including NIST SP 800-63B, https://pages.nist.gov/800-63-3/sp800-63b.html
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### and weighing usability against security.
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### Configuration for systemwide password quality limits
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### Defaults:
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### Number of characters in the new password that must not be present in the
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### old password.
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difok = 4
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### Length over complexity: Studies show that longer passphrases are significantly more
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### resistant to brute-force and dictionary attacks. NIST recommends at least eight characters
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### but advises longer passphrases (e.g., 12-64) for increased security. Twenty characters strike a
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### good balance between security and user convenience.
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### Minimum acceptable size for the new password (plus one if
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### credits are not disabled, which is the default). (See pam_cracklib manual.)
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### Cannot be set to a lower value than 6.
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minlen = 40
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### dcredit = 0, ucredit = 0, lcredit = 0, ocredit = 0, minclass = 0
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### NIST SP 800-63B advises against rigid complexity rules (numbers, symbols, uppercase)
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### because they can lead users to adopt predictable patterns (e.g., "Pa$$word!").
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### Length and dictionary checks are more effective.
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### The maximum credit for having digits in the new password. If less than 0
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### it is the minimum number of digits in the new password.
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dcredit = 0
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### The maximum credit for having uppercase characters in the new password.
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### If less than 0, it is the minimum number of uppercase characters in the new
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### password.
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ucredit = 0
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### The maximum credit for having lowercase characters in the new password.
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### If less than 0, it is the minimum number of lowercase characters in the new
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### password.
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lcredit = 0
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### The maximum credit for having other characters in the new password.
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### If less than 0, it is the minimum number of other characters in the new
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### password.
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ocredit = 0
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### The minimum number of required classes of characters for the new
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### password (digits, uppercase, lowercase, others).
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minclass = 0
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### The maximum number of allowed consecutive same characters in the new password.
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### The check is disabled if the value is 0.
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maxrepeat = 3
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### The maximum number of allowed consecutive characters of the same class in the
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### new password.
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### The check is disabled if the value is 0.
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maxclassrepeat = 0
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### Whether to check for the words from the passwd entry GECOS string of the user.
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### The check is enabled if the value is not 0.
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### gecoscheck = 0
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### Whether to check for the words from the cracklib dictionary.
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### The check is enabled if the value is not 0.
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dictcheck = 1
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### Whether to check if it contains the username in some form.
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### The check is enabled if the value is not 0.
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usercheck = 1
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### Length of substrings from the username to check for in the password
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### The check is enabled if the value is greater than 0, and the usercheck is enabled.
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usersubstr = 3
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### Whether the check is enforced by the PAM module and possibly other
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### applications.
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### The new password is rejected if it fails the check, and the value is not 0.
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enforcing = 1
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### Path to the cracklib dictionaries. The default is to use the cracklib default.
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dictpath =
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# Prompt user at most N times before returning with error. The default is 1.
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retry = 3
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# Enforces pwquality checks on the root user password.
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# Enabled if the option is present.
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enforce_for_root
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# Skip testing the password quality for users that are not present in the
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# /etc/passwd file.
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# Enabled if the option is present.
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local_users_only
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EOF
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printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
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exit 0
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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