community.crypto.acme_challenge_cert_helper module – Prepare certificates required for ACME challenges such as tls-alpn-01

Note

This module is part of the community.crypto collection (version 2.22.0).

It is not included in ansible-core. To check whether it is installed, run ansible-galaxy collection list.

To install it, use: ansible-galaxy collection install community.crypto. You need further requirements to be able to use this module, see Requirements for details.

To use it in a playbook, specify: community.crypto.acme_challenge_cert_helper.

Synopsis

  • Prepares certificates for ACME challenges such as tls-alpn-01.

  • The raw data is provided by the community.crypto.acme_certificate module, and needs to be converted to a certificate to be used for challenge validation. This module provides a simple way to generate the required certificates.

Requirements

The below requirements are needed on the host that executes this module.

  • cryptography >= 1.3

Parameters

Parameter

Comments

challenge

string / required

The challenge type.

Choices:

  • "tls-alpn-01"

challenge_data

dictionary / required

The challenge_data entry provided by community.crypto.acme_certificate for the challenge.

private_key_content

string

Content of the private key to use for this challenge certificate.

Mutually exclusive with private_key_src.

private_key_passphrase

string

added in community.crypto 1.6.0

Phassphrase to use to decode the private key.

private_key_src

path

Path to a file containing the private key file to use for this challenge certificate.

Mutually exclusive with private_key_content.

Attributes

Attribute

Support

Description

check_mode

Support: none

This action does not modify state.

Can run in check_mode and return changed status prediction without modifying target.

diff_mode

Support: N/A

This action does not modify state.

Will return details on what has changed (or possibly needs changing in check_mode), when in diff mode.

See Also

See also

Automatic Certificate Management Environment (ACME)

The specification of the ACME protocol (RFC 8555).

ACME TLS ALPN Challenge Extension

The specification of the tls-alpn-01 challenge (RFC 8737).

Examples

- name: Create challenges for a given CRT for sample.com
  community.crypto.acme_certificate:
    account_key_src: /etc/pki/cert/private/account.key
    challenge: tls-alpn-01
    csr: /etc/pki/cert/csr/sample.com.csr
    dest: /etc/httpd/ssl/sample.com.crt
  register: sample_com_challenge

- name: Create certificates for challenges
  community.crypto.acme_challenge_cert_helper:
    challenge: tls-alpn-01
    challenge_data: "{{ item.value['tls-alpn-01'] }}"
    private_key_src: /etc/pki/cert/key/sample.com.key
  loop: "{{ sample_com_challenge.challenge_data | dictsort }}"
  register: sample_com_challenge_certs

- name: Install challenge certificates
  # We need to set up HTTPS such that for the domain,
  # regular_certificate is delivered for regular connections,
  # except if ALPN selects the "acme-tls/1"; then, the
  # challenge_certificate must be delivered.
  # This can for example be achieved with very new versions
  # of NGINX; search for ssl_preread and
  # ssl_preread_alpn_protocols for information on how to
  # route by ALPN protocol.
  ...:
    domain: "{{ item.domain }}"
    challenge_certificate: "{{ item.challenge_certificate }}"
    regular_certificate: "{{ item.regular_certificate }}"
    private_key: /etc/pki/cert/key/sample.com.key
  loop: "{{ sample_com_challenge_certs.results }}"

- name: Create certificate for a given CSR for sample.com
  community.crypto.acme_certificate:
    account_key_src: /etc/pki/cert/private/account.key
    challenge: tls-alpn-01
    csr: /etc/pki/cert/csr/sample.com.csr
    dest: /etc/httpd/ssl/sample.com.crt
    data: "{{ sample_com_challenge }}"

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key

Description

challenge_certificate

string

The challenge certificate in PEM format.

Returned: always

domain

string

The domain the challenge is for. The certificate should be provided if this is specified in the request’s the Host header.

Returned: always

identifier

string

The identifier for the actual resource. Will be a domain name if identifier_type=dns, or an IP address if identifier_type=ip.

Returned: always

identifier_type

string

The identifier type for the actual resource identifier.

Returned: always

Can only return:

  • "dns"

  • "ip"

regular_certificate

string

A self-signed certificate for the challenge domain.

If no existing certificate exists, can be used to set-up https in the first place if that is needed for providing the challenge.

Returned: always

Authors

  • Felix Fontein (@felixfontein)