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

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

from __future__ import absolute_import, division, print_function
__metaclass__ = type


DOCUMENTATION = r'''
---
module: x509_crl_info
version_added: '1.0.0'
short_description: Retrieve information on Certificate Revocation Lists (CRLs)
description:
    - This module allows one to retrieve information on Certificate Revocation Lists (CRLs).
requirements:
    - cryptography >= 1.2
author:
    - Felix Fontein (@felixfontein)
options:
    path:
        description:
            - Remote absolute path where the generated CRL file should be created or is already located.
            - Either I(path) or I(content) must be specified, but not both.
        type: path
    content:
        description:
            - Content of the X.509 CRL in PEM format, or Base64-encoded X.509 CRL.
            - Either I(path) or I(content) must be specified, but not both.
        type: str

notes:
    - All timestamp values are provided in ASN.1 TIME format, in other words, following the C(YYYYMMDDHHMMSSZ) pattern.
      They are all in UTC.
    - Supports C(check_mode).
seealso:
    - module: community.crypto.x509_crl
'''

EXAMPLES = r'''
- name: Get information on CRL
  community.crypto.x509_crl_info:
    path: /etc/ssl/my-ca.crl
  register: result

- name: Print the information
  ansible.builtin.debug:
    msg: "{{ result }}"
'''

RETURN = r'''
format:
    description:
        - Whether the CRL is in PEM format (C(pem)) or in DER format (C(der)).
    returned: success
    type: str
    sample: pem
issuer:
    description:
        - The CRL's issuer.
        - Note that for repeated values, only the last one will be returned.
    returned: success
    type: dict
    sample: '{"organizationName": "Ansible", "commonName": "ca.example.com"}'
issuer_ordered:
    description: The CRL's issuer as an ordered list of tuples.
    returned: success
    type: list
    elements: list
    sample: '[["organizationName", "Ansible"], ["commonName": "ca.example.com"]]'
last_update:
    description: The point in time from which this CRL can be trusted as ASN.1 TIME.
    returned: success
    type: str
    sample: 20190413202428Z
next_update:
    description: The point in time from which a new CRL will be issued and the client has to check for it as ASN.1 TIME.
    returned: success
    type: str
    sample: 20190413202428Z
digest:
    description: The signature algorithm used to sign the CRL.
    returned: success
    type: str
    sample: sha256WithRSAEncryption
revoked_certificates:
    description: List of certificates to be revoked.
    returned: success
    type: list
    elements: dict
    contains:
        serial_number:
            description: Serial number of the certificate.
            type: int
            sample: 1234
        revocation_date:
            description: The point in time the certificate was revoked as ASN.1 TIME.
            type: str
            sample: 20190413202428Z
        issuer:
            description: The certificate's issuer.
            type: list
            elements: str
            sample: '["DNS:ca.example.org"]'
        issuer_critical:
            description: Whether the certificate issuer extension is critical.
            type: bool
            sample: no
        reason:
            description:
                - The value for the revocation reason extension.
                - One of C(unspecified), C(key_compromise), C(ca_compromise), C(affiliation_changed), C(superseded),
                  C(cessation_of_operation), C(certificate_hold), C(privilege_withdrawn), C(aa_compromise), and
                  C(remove_from_crl).
            type: str
            sample: key_compromise
        reason_critical:
            description: Whether the revocation reason extension is critical.
            type: bool
            sample: no
        invalidity_date:
            description: |
                The point in time it was known/suspected that the private key was compromised
                or that the certificate otherwise became invalid as ASN.1 TIME.
            type: str
            sample: 20190413202428Z
        invalidity_date_critical:
            description: Whether the invalidity date extension is critical.
            type: bool
            sample: no
'''


import base64
import binascii

from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils._text import to_native

from ansible_collections.community.crypto.plugins.module_utils.crypto.basic import (
    OpenSSLObjectError,
)

from ansible_collections.community.crypto.plugins.module_utils.crypto.pem import (
    identify_pem_format,
)

from ansible_collections.community.crypto.plugins.module_utils.crypto.module_backends.crl_info import (
    get_crl_info,
)


def main():
    module = AnsibleModule(
        argument_spec=dict(
            path=dict(type='path'),
            content=dict(type='str'),
        ),
        required_one_of=(
            ['path', 'content'],
        ),
        mutually_exclusive=(
            ['path', 'content'],
        ),
        supports_check_mode=True,
    )

    if module.params['content'] is None:
        try:
            with open(module.params['path'], 'rb') as f:
                data = f.read()
        except (IOError, OSError) as e:
            module.fail_json(msg='Error while reading CRL file from disk: {0}'.format(e))
    else:
        data = module.params['content'].encode('utf-8')
        if not identify_pem_format(data):
            try:
                data = base64.b64decode(module.params['content'])
            except (binascii.Error, TypeError) as e:
                module.fail_json(msg='Error while Base64 decoding content: {0}'.format(e))

    try:
        result = get_crl_info(module, data)
        module.exit_json(**result)
    except OpenSSLObjectError as e:
        module.fail_json(msg=to_native(e))


if __name__ == "__main__":
    main()