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#!/usr/bin/python
# -*- coding: utf-8 -*-

# Copyright (c) 2020, Felix Fontein <felix@fontein.de>
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
# SPDX-License-Identifier: GPL-3.0-or-later

from __future__ import absolute_import, division, print_function
__metaclass__ = type


DOCUMENTATION = r'''
---
module: openssl_privatekey_pipe
short_description: Generate OpenSSL private keys without disk access
version_added: 1.3.0
description:
    - This module allows one to (re)generate OpenSSL private keys without disk access.
    - This allows to read and write keys to vaults without having to write intermediate versions to disk.
    - Make sure to not write the result of this module into logs or to the console, as it contains private key data! Use the C(no_log) task option to be sure.
    - Note that this module is implemented as an L(action plugin,https://docs.ansible.com/ansible/latest/plugins/action.html)
      and will always be executed on the controller.
author:
    - Yanis Guenane (@Spredzy)
    - Felix Fontein (@felixfontein)
extends_documentation_fragment:
    - community.crypto.attributes
    - community.crypto.attributes.flow
    - community.crypto.module_privatekey
attributes:
    action:
        support: full
    async:
        support: none
        details:
            - This action runs completely on the controller.
    check_mode:
        support: full
        details:
            - Currently in check mode, private keys will not be (re-)generated, only the changed status is
              set. This will change in community.crypto 3.0.0.
            - From community.crypto 3.0.0 on, the module will ignore check mode and always behave as if
              check mode is not active. If you think this breaks your use-case of this module, please
              create an issue in the community.crypto repository.
    diff_mode:
        support: full
options:
    content:
        description:
            - The current private key data.
            - Needed for idempotency. If not provided, the module will always return a change, and all idempotence-related
              options are ignored.
        type: str
    content_base64:
        description:
            - Set to V(true) if the content is base64 encoded.
        type: bool
        default: false
    return_current_key:
        description:
            - Set to V(true) to return the current private key when the module did not generate a new one.
            - Note that in case of check mode, when this option is not set to V(true), the module always returns the
              current key (if it was provided) and Ansible will replace it by C(VALUE_SPECIFIED_IN_NO_LOG_PARAMETER).
        type: bool
        default: false
    regenerate:
        description:
            - Allows to configure in which situations the module is allowed to regenerate private keys.
              The module will always generate a new key if the destination file does not exist.
            - By default, the key will be regenerated when it does not match the module's options,
              except when the key cannot be read or the passphrase does not match. Please note that
              this B(changed) for Ansible 2.10. For Ansible 2.9, the behavior was as if V(full_idempotence)
              is specified.
            - If set to V(never), the module will fail if the key cannot be read or the passphrase
              is not matching, and will never regenerate an existing key.
            - If set to V(fail), the module will fail if the key does not correspond to the module's
              options.
            - If set to V(partial_idempotence), the key will be regenerated if it does not conform to
              the module's options. The key is B(not) regenerated if it cannot be read (broken file),
              the key is protected by an unknown passphrase, or when they key is not protected by a
              passphrase, but a passphrase is specified.
            - If set to V(full_idempotence), the key will be regenerated if it does not conform to the
              module's options. This is also the case if the key cannot be read (broken file), the key
              is protected by an unknown passphrase, or when they key is not protected by a passphrase,
              but a passphrase is specified. Make sure you have a B(backup) when using this option!
            - If set to V(always), the module will always regenerate the key.
            - Note that if O(format_mismatch) is set to V(convert) and everything matches except the
              format, the key will always be converted, except if O(regenerate) is set to V(always).
seealso:
    - module: community.crypto.openssl_privatekey
    - module: community.crypto.openssl_privatekey_info
'''

EXAMPLES = r'''
- name: Generate an OpenSSL private key with the default values (4096 bits, RSA)
  community.crypto.openssl_privatekey_pipe:
  register: output
  no_log: true  # make sure that private key data is not accidentally revealed in logs!
- name: Show generated key
  ansible.builtin.debug:
    msg: "{{ output.privatekey }}"
  # DO NOT OUTPUT KEY MATERIAL TO CONSOLE OR LOGS IN PRODUCTION!


- name: Generate or update a Mozilla sops encrypted key
  block:
    - name: Update sops-encrypted key with the community.sops collection
      community.crypto.openssl_privatekey_pipe:
        content: "{{ lookup('community.sops.sops', 'private_key.pem.sops') }}"
        size: 2048
      register: output
      no_log: true  # make sure that private key data is not accidentally revealed in logs!

    - name: Update encrypted key when openssl_privatekey_pipe reported a change
      community.sops.sops_encrypt:
        path: private_key.pem.sops
        content_text: "{{ output.privatekey }}"
      when: output is changed
  always:
    - name: Make sure that output (which contains the private key) is overwritten
      ansible.builtin.set_fact:
        output: ''
'''

RETURN = r'''
size:
    description: Size (in bits) of the TLS/SSL private key.
    returned: changed or success
    type: int
    sample: 4096
type:
    description: Algorithm used to generate the TLS/SSL private key.
    returned: changed or success
    type: str
    sample: RSA
curve:
    description: Elliptic curve used to generate the TLS/SSL private key.
    returned: changed or success, and O(type) is V(ECC)
    type: str
    sample: secp256r1
fingerprint:
    description:
    - The fingerprint of the public key. Fingerprint will be generated for each C(hashlib.algorithms) available.
    returned: changed or success
    type: dict
    sample:
      md5: "84:75:71:72:8d:04:b5:6c:4d:37:6d:66:83:f5:4c:29"
      sha1: "51:cc:7c:68:5d:eb:41:43:88:7e:1a:ae:c7:f8:24:72:ee:71:f6:10"
      sha224: "b1:19:a6:6c:14:ac:33:1d:ed:18:50:d3:06:5c:b2:32:91:f1:f1:52:8c:cb:d5:75:e9:f5:9b:46"
      sha256: "41:ab:c7:cb:d5:5f:30:60:46:99:ac:d4:00:70:cf:a1:76:4f:24:5d:10:24:57:5d:51:6e:09:97:df:2f:de:c7"
      sha384: "85:39:50:4e:de:d9:19:33:40:70:ae:10:ab:59:24:19:51:c3:a2:e4:0b:1c:b1:6e:dd:b3:0c:d9:9e:6a:46:af:da:18:f8:ef:ae:2e:c0:9a:75:2c:9b:b3:0f:3a:5f:3d"
      sha512: "fd:ed:5e:39:48:5f:9f:fe:7f:25:06:3f:79:08:cd:ee:a5:e7:b3:3d:13:82:87:1f:84:e1:f5:c7:28:77:53:94:86:56:38:69:f0:d9:35:22:01:1e:a6:60:...:0f:9b"
privatekey:
    description:
        - The generated private key's content.
        - Please note that if the result is not changed, the current private key will only be returned
          if the O(return_current_key) option is set to V(true).
        - Will be Base64-encoded if the key is in raw format.
    returned: changed, or O(return_current_key) is V(true)
    type: str
'''