majic-ansible-roles Changeset

Changeset - a7cd31c6886d

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Branko Majic (branko) - 4 years ago 2020-05-18 16:45:24
branko@majic.rs

MAR-153: Use custom Diffie-Helman parameters for SMTP server in the mail_server role.

3 files changed with 53 insertions and 0 deletions:

roles/mail_server/molecule/default/tests/test_default.py

roles/mail_server/tasks/main.yml

roles/mail_server/templates/main.cf.j2

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roles/mail_server/molecule/default/tests/test_default.py

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@@ @@ -355,3 +355,44 @@ def test_firewall_configuration_file(host): @@
         assert config.user == 'root'
         assert config.group == 'root'
         assert config.mode == 0o640
 def test_smtp_server_dh_parameter_file(host):
     """
     Tests if the Diffie-Helman parameter file has been generated
     correctly.
     """
     hostname = host.run('hostname').stdout.strip()
     dhparam_file_path = '/etc/ssl/private/%s_smtp.dh.pem' % hostname
     with host.sudo():
         dhparam_file = host.file(dhparam_file_path)
         assert dhparam_file.is_file
         assert dhparam_file.user == 'root'
         assert dhparam_file.group == 'root'
         assert dhparam_file.mode == 0o640
         dhparam_info = host.run("openssl dhparam -noout -text -in %s", dhparam_file_path)
         assert "DH Parameters: (2048 bit)" in dhparam_info.stdout
 def test_smtp_server_uses_correct_dh_parameters(host):
     """
     Tests if the SMTP server uses the generated Diffie-Helman parameter.
     """
     hostname = host.run('hostname').stdout.strip()
     with host.sudo():
         expected_dhparam = host.file('/etc/ssl/private/%s_smtp.dh.pem' % hostname).content_string.rstrip()
     connection = host.run("gnutls-cli --no-ca-verification --starttls-proto=smtp --port 25 --priority 'NONE:+VERS-TLS1.2:+CTYPE-X509:+COMP-NULL:+SIGN-RSA-SHA384:+DHE-RSA:+SHA384:+AEAD:+AES-256-GCM' --verbose localhost")
     output = connection.stdout
     begin_marker = "-----BEGIN DH PARAMETERS-----"
     end_marker = "-----END DH PARAMETERS-----"
     used_dhparam = output[output.find(begin_marker):output.find(end_marker) + len(end_marker)]
     assert used_dhparam == expected_dhparam

roles/mail_server/tasks/main.yml

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@@ @@ -59,6 +59,16 @@ @@
   notify:
     - Restart Postfix
 - name: Generate the SMTP server Diffie-Helman parameter
   openssl_dhparam:
     owner: root
     group: root
     mode: 0640
     path: "/etc/ssl/private/{{ ansible_fqdn }}_smtp.dh.pem"
     size: 2048
   notify:
     - Restart Postfix
 - name: Deploy IMAP TLS private key
   copy:
     dest: "/etc/ssl/private/{{ ansible_fqdn }}_imap.key"

roles/mail_server/templates/main.cf.j2

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@@ @@ -54,6 +54,8 @@ smtpd_tls_security_level = may @@
 smtpd_tls_auth_only = yes
 smtpd_tls_cert_file = /etc/ssl/certs/{{ ansible_fqdn }}_smtp.pem
 smtpd_tls_key_file = /etc/ssl/private/{{ ansible_fqdn }}_smtp.key
 smtpd_tls_dh1024_param_file = /etc/ssl/private/{{ inventory_hostname }}_smtp.dh.pem
 smtpd_tls_dh512_param_file = /etc/ssl/private/{{ inventory_hostname }}_smtp.dh.pem
 smtpd_use_tls=yes
 smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
 smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

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