# -*- coding: utf-8 -*-

# Copyright (c) 2022, 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 = '''
name: openssl_csr_info
short_description: Retrieve information from OpenSSL Certificate Signing Requests (CSR)
version_added: 2.10.0
author:
    - Felix Fontein (@felixfontein)
description:
    - Provided an OpenSSL Certificate Signing Requests (CSR), retrieve information.
    - This is a filter version of the M(community.crypto.openssl_csr_info) module.
options:
    _input:
        description:
            - The content of the OpenSSL CSR.
        type: string
        required: true
extends_documentation_fragment:
    - community.crypto.name_encoding
seealso:
    - module: community.crypto.openssl_csr_info
'''

EXAMPLES = '''
- name: Show the Subject Alt Names of the CSR
  ansible.builtin.debug:
    msg: >-
      {{
        (
          lookup('ansible.builtin.file', '/path/to/cert.csr')
          | community.crypto.openssl_csr_info
        ).subject_alt_name | join(', ')
      }}
'''

RETURN = '''
_value:
    description:
        - Information on the certificate.
    type: dict
    contains:
        signature_valid:
            description:
                - Whether the CSR's signature is valid.
                - In case the check returns V(false), the module will fail.
            returned: success
            type: bool
        basic_constraints:
            description: Entries in the C(basic_constraints) extension, or V(none) if extension is not present.
            returned: success
            type: list
            elements: str
            sample: ['CA:TRUE', 'pathlen:1']
        basic_constraints_critical:
            description: Whether the C(basic_constraints) extension is critical.
            returned: success
            type: bool
        extended_key_usage:
            description: Entries in the C(extended_key_usage) extension, or V(none) if extension is not present.
            returned: success
            type: list
            elements: str
            sample: [Biometric Info, DVCS, Time Stamping]
        extended_key_usage_critical:
            description: Whether the C(extended_key_usage) extension is critical.
            returned: success
            type: bool
        extensions_by_oid:
            description: Returns a dictionary for every extension OID
            returned: success
            type: dict
            contains:
                critical:
                    description: Whether the extension is critical.
                    returned: success
                    type: bool
                value:
                    description:
                      - The Base64 encoded value (in DER format) of the extension.
                      - B(Note) that depending on the C(cryptography) version used, it is
                        not possible to extract the ASN.1 content of the extension, but only
                        to provide the re-encoded content of the extension in case it was
                        parsed by C(cryptography). This should usually result in exactly the
                        same value, except if the original extension value was malformed.
                    returned: success
                    type: str
                    sample: "MAMCAQU="
            sample: {"1.3.6.1.5.5.7.1.24": { "critical": false, "value": "MAMCAQU="}}
        key_usage:
            description: Entries in the C(key_usage) extension, or V(none) if extension is not present.
            returned: success
            type: str
            sample: [Key Agreement, Data Encipherment]
        key_usage_critical:
            description: Whether the C(key_usage) extension is critical.
            returned: success
            type: bool
        subject_alt_name:
            description:
                - Entries in the C(subject_alt_name) extension, or V(none) if extension is not present.
                - See O(name_encoding) for how IDNs are handled.
            returned: success
            type: list
            elements: str
            sample: ["DNS:www.ansible.com", "IP:1.2.3.4"]
        subject_alt_name_critical:
            description: Whether the C(subject_alt_name) extension is critical.
            returned: success
            type: bool
        ocsp_must_staple:
            description: V(true) if the OCSP Must Staple extension is present, V(none) otherwise.
            returned: success
            type: bool
        ocsp_must_staple_critical:
            description: Whether the C(ocsp_must_staple) extension is critical.
            returned: success
            type: bool
        name_constraints_permitted:
            description: List of permitted subtrees to sign certificates for.
            returned: success
            type: list
            elements: str
            sample: ['email:.somedomain.com']
        name_constraints_excluded:
            description:
                - List of excluded subtrees the CA cannot sign certificates for.
                - Is V(none) if extension is not present.
                - See O(name_encoding) for how IDNs are handled.
            returned: success
            type: list
            elements: str
            sample: ['email:.com']
        name_constraints_critical:
            description:
                - Whether the C(name_constraints) extension is critical.
                - Is V(none) if extension is not present.
            returned: success
            type: bool
        subject:
            description:
                - The CSR's subject as a dictionary.
                - Note that for repeated values, only the last one will be returned.
            returned: success
            type: dict
            sample: {"commonName": "www.example.com", "emailAddress": "test@example.com"}
        subject_ordered:
            description: The CSR's subject as an ordered list of tuples.
            returned: success
            type: list
            elements: list
            sample: [["commonName", "www.example.com"], ["emailAddress": "test@example.com"]]
        public_key:
            description: CSR's public key in PEM format
            returned: success
            type: str
            sample: "-----BEGIN PUBLIC KEY-----\nMIICIjANBgkqhkiG9w0BAQEFAAOCAg8A..."
        public_key_type:
            description:
                - The CSR's public key's type.
                - One of V(RSA), V(DSA), V(ECC), V(Ed25519), V(X25519), V(Ed448), or V(X448).
                - Will start with C(unknown) if the key type cannot be determined.
            returned: success
            type: str
            sample: RSA
        public_key_data:
            description:
                - Public key data. Depends on the public key's type.
            returned: success
            type: dict
            contains:
                size:
                    description:
                        - Bit size of modulus (RSA) or prime number (DSA).
                    type: int
                    returned: When RV(_value.public_key_type=RSA) or RV(_value.public_key_type=DSA)
                modulus:
                    description:
                        - The RSA key's modulus.
                    type: int
                    returned: When RV(_value.public_key_type=RSA)
                exponent:
                    description:
                        - The RSA key's public exponent.
                    type: int
                    returned: When RV(_value.public_key_type=RSA)
                p:
                    description:
                        - The C(p) value for DSA.
                        - This is the prime modulus upon which arithmetic takes place.
                    type: int
                    returned: When RV(_value.public_key_type=DSA)
                q:
                    description:
                        - The C(q) value for DSA.
                        - This is a prime that divides C(p - 1), and at the same time the order of the subgroup of the
                          multiplicative group of the prime field used.
                    type: int
                    returned: When RV(_value.public_key_type=DSA)
                g:
                    description:
                        - The C(g) value for DSA.
                        - This is the element spanning the subgroup of the multiplicative group of the prime field used.
                    type: int
                    returned: When RV(_value.public_key_type=DSA)
                curve:
                    description:
                        - The curve's name for ECC.
                    type: str
                    returned: When RV(_value.public_key_type=ECC)
                exponent_size:
                    description:
                        - The maximum number of bits of a private key. This is basically the bit size of the subgroup used.
                    type: int
                    returned: When RV(_value.public_key_type=ECC)
                x:
                    description:
                        - The C(x) coordinate for the public point on the elliptic curve.
                    type: int
                    returned: When RV(_value.public_key_type=ECC)
                y:
                    description:
                        - For RV(_value.public_key_type=ECC), this is the C(y) coordinate for the public point on the elliptic curve.
                        - For RV(_value.public_key_type=DSA), this is the publicly known group element whose discrete logarithm with
                          respect to C(g) is the private key.
                    type: int
                    returned: When RV(_value.public_key_type=DSA) or RV(_value.public_key_type=ECC)
        public_key_fingerprints:
            description:
                - Fingerprints of CSR's public key.
                - For every hash algorithm available, the fingerprint is computed.
            returned: success
            type: dict
            sample: "{'sha256': 'd4:b3:aa:6d:c8:04:ce:4e:ba:f6:29:4d:92:a3:94:b0:c2:ff:bd:bf:33:63:11:43:34:0f:51:b0:95:09:2f:63',
                      'sha512': 'f7:07:4a:f0:b0:f0:e6:8b:95:5f:f9:e6:61:0a:32:68:f1..."
        subject_key_identifier:
            description:
                - The CSR's subject key identifier.
                - The identifier is returned in hexadecimal, with V(:) used to separate bytes.
                - Is V(none) if the C(SubjectKeyIdentifier) extension is not present.
            returned: success
            type: str
            sample: '00:11:22:33:44:55:66:77:88:99:aa:bb:cc:dd:ee:ff:00:11:22:33'
        authority_key_identifier:
            description:
                - The CSR's authority key identifier.
                - The identifier is returned in hexadecimal, with V(:) used to separate bytes.
                - Is V(none) if the C(AuthorityKeyIdentifier) extension is not present.
            returned: success
            type: str
            sample: '00:11:22:33:44:55:66:77:88:99:aa:bb:cc:dd:ee:ff:00:11:22:33'
        authority_cert_issuer:
            description:
                - The CSR's authority cert issuer as a list of general names.
                - Is V(none) if the C(AuthorityKeyIdentifier) extension is not present.
                - See O(name_encoding) for how IDNs are handled.
            returned: success
            type: list
            elements: str
            sample: ["DNS:www.ansible.com", "IP:1.2.3.4"]
        authority_cert_serial_number:
            description:
                - The CSR's authority cert serial number.
                - Is V(none) if the C(AuthorityKeyIdentifier) extension is not present.
            returned: success
            type: int
            sample: 12345
'''

from ansible.errors import AnsibleFilterError
from ansible.module_utils.six import string_types
from ansible.module_utils.common.text.converters import to_bytes, to_native

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

from ansible_collections.community.crypto.plugins.module_utils.crypto.module_backends.csr_info import (
    get_csr_info,
)

from ansible_collections.community.crypto.plugins.plugin_utils.filter_module import FilterModuleMock


def openssl_csr_info_filter(data, name_encoding='ignore'):
    '''Extract information from X.509 PEM certificate.'''
    if not isinstance(data, string_types):
        raise AnsibleFilterError('The community.crypto.openssl_csr_info input must be a text type, not %s' % type(data))
    if not isinstance(name_encoding, string_types):
        raise AnsibleFilterError('The name_encoding option must be of a text type, not %s' % type(name_encoding))
    name_encoding = to_native(name_encoding)
    if name_encoding not in ('ignore', 'idna', 'unicode'):
        raise AnsibleFilterError('The name_encoding option must be one of the values "ignore", "idna", or "unicode", not "%s"' % name_encoding)

    module = FilterModuleMock({'name_encoding': name_encoding})
    try:
        return get_csr_info(module, 'cryptography', content=to_bytes(data), validate_signature=True)
    except OpenSSLObjectError as exc:
        raise AnsibleFilterError(to_native(exc))


class FilterModule(object):
    '''Ansible jinja2 filters'''

    def filters(self):
        return {
            'openssl_csr_info': openssl_csr_info_filter,
        }
