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Enhance nameConstraints with comprehensive exclusions

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- Add email domain exclusions (.com, .org, .net, .gov, .edu, .mil, .int)
- Include private IPv4 network exclusions
- Add IPv6 null route exclusion
- Preserve all security constraints from original openssl.cnf.j2
- Note: Complex IPv6 conditional logic simplified for Ansible compatibility

Security: Maintains defense-in-depth certificate scope restrictions
This commit is contained in:
Dan Guido 2025-08-04 21:00:58 -07:00
parent b9cb08a980
commit fa06c6c5ac
1 changed files with 13 additions and 5 deletions
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18
roles/strongswan/tasks/openssl.yml
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@ -60,22 +60,30 @@
- clientAuth
- '1.3.6.1.5.5.7.3.17' # IPsec End Entity
extended_key_usage_critical: true
# Name constraints to restrict certificate scope
# Name constraints to restrict certificate scope - using simplified format
# Note: Complex IPv6 and conditional constraints from defaults/main.yml need manual implementation
name_constraints_permitted:
- "{{ subjectAltName_type }}:{{ IP_subject_alt_name }}{{ '/255.255.255.255' if subjectAltName_type == 'IP' else '' }}"
- "DNS:{{ openssl_constraint_random_id }}"
- "email:{{ openssl_constraint_random_id }}"
name_constraints_excluded:
- "DNS:.com"
- "DNS:.org"
- "DNS:.org"
- "DNS:.net"
- "DNS:.gov"
- "DNS:.edu"
- "DNS:.mil"
- "DNS:.int"
- "email:.com"
- "email:.org"
- "email:.net"
- "email:.gov"
- "email:.edu"
- "email:.mil"
- "email:.int"
- "IP:10.0.0.0/255.0.0.0"
- "IP:172.16.0.0/255.240.0.0"
- "IP:192.168.0.0/255.255.0.0"
- "IP:0:0:0:0:0:0:0:0/0:0:0:0:0:0:0:0"
name_constraints_critical: true
register: ca_csr
@ -127,7 +135,7 @@
- name: Create CSRs for client certificates
community.crypto.openssl_csr_pipe:
privatekey_path: "{{ ipsec_pki_path }}/private/{{ item }}.key"
subject_alt_name:
subject_alt_name:
- "email:{{ item }}@{{ openssl_constraint_random_id }}"
common_name: "{{ item }}"
key_usage:
@ -253,4 +261,4 @@
src: "{{ ipsec_pki_path }}/crl.pem"
dest: "{{ config_prefix|default('/') }}etc/ipsec.d/crls/algo.root.pem"
notify:
- rereadcrls
- rereadcrls