Adding module which allows to complete certificate chains (#44169)

* Adding certificate_complete_chain module. * Avoid code smell errors. * Removing input_chain_src. * Make sure line ending is there.
2018-08-23 23:18:36 +02:00 · 2018-08-23 23:18:36 +02:00 · 0e6234ab04
commit 0e6234ab04
parent 72d4880b85
20 changed files with 4629 additions and 0 deletions
--- a/lib/ansible/modules/crypto/certificate_complete_chain.py
+++ b/lib/ansible/modules/crypto/certificate_complete_chain.py
@ -0,0 +1,341 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+#
+# (c) 2018, 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
+
+
+ANSIBLE_METADATA = {'metadata_version': '1.1',
+                    'status': ['preview'],
+                    'supported_by': 'community'}
+
+
+DOCUMENTATION = '''
+---
+module: certificate_complete_chain
+author: "Felix Fontein (@felixfontein)"
+version_added: "2.7"
+short_description: Complete certificate chain given a set of untrusted and root certificates
+description:
+    - "This module completes a given chain of certificates in PEM format by finding
+       intermediate certificates from a given set of certificates, until it finds a root
+       certificate in another given set of certificates."
+    - "This can for example be used to find the root certificate for a certificate chain
+       returned by M(acme_certificate)."
+    - "Note that this module does I(not) check for validity of the chains. It only
+       checks that issuer and subject match, and that the signature is correct. It
+       ignores validity dates and key usage completely. If you need to verify that a
+       generated chain is valid, please use C(openssl verify ...)."
+requirements:
+    - "cryptography >= 1.5"
+options:
+    input_chain:
+        required: yes
+        description:
+            - A concatenated set of certificates in PEM format forming a chain.
+            - The module will try to complete this chain.
+    root_certificates:
+        required: yes
+        type: list
+        description:
+            - "A list of filenames or directories."
+            - "A filename is assumed to point to a file containing one or more certificates
+               in PEM format. All certificates in this file will be added to the set of
+               root certificates."
+            - "If a directory name is given, all files in the directory and its
+               subdirectories will be scanned and tried to be parsed as concatenated
+               certificates in PEM format."
+            - "Symbolic links will be followed."
+    intermediate_certificates:
+        required: no
+        type: list
+        default: []
+        description:
+            - "A list of filenames or directories."
+            - "A filename is assumed to point to a file containing one or more certificates
+               in PEM format. All certificates in this file will be added to the set of
+               root certificates."
+            - "If a directory name is given, all files in the directory and its
+               subdirectories will be scanned and tried to be parsed as concatenated
+               certificates in PEM format."
+            - "Symbolic links will be followed."
+'''
+
+
+EXAMPLES = '''
+# Given a leaf certificate for www.ansible.com and one or more intermediate
+# certificates, finds the associated root certificate.
+- name: Find root certificate
+  certificate_complete_chain:
+    input_chain: "{{ lookup('file', '/etc/ssl/csr/www.ansible.com-fullchain.pem') }}"
+    root_certificates:
+    - /etc/ca-certificates/
+  register: www_ansible_com
+- name: Write root certificate to disk
+  copy:
+    dest: /etc/ssl/csr/www.ansible.com-root.pem
+    content: "{{ www_ansible_com.root }}"
+
+# Given a leaf certificate for www.ansible.com, and a list of intermediate
+# certificates, finds the associated root certificate.
+- name: Find root certificate
+  certificate_complete_chain:
+    input_chain: "{{ lookup('file', '/etc/ssl/csr/www.ansible.com.pem') }}"
+    intermediate_certificates:
+    - /etc/ssl/csr/www.ansible.com-chain.pem
+    root_certificates:
+    - /etc/ca-certificates/
+  register: www_ansible_com
+- name: Write complete chain to disk
+  copy:
+    dest: /etc/ssl/csr/www.ansible.com-completechain.pem
+    content: "{{ ''.join(www_ansible_com.complete_chain) }}"
+- name: Write root chain (intermediates and root) to disk
+  copy:
+    dest: /etc/ssl/csr/www.ansible.com-rootchain.pem
+    content: "{{ ''.join(www_ansible_com.chain) }}"
+'''
+
+
+RETURN = '''
+root:
+    description:
+        - "The root certificate in PEM format."
+    returned: success
+    type: string
+chain:
+    description:
+        - "The chain added to the given input chain. Includes the root certificate."
+        - "Returned as a list of PEM certificates."
+    returned: success
+    type: list
+complete_chain:
+    description:
+        - "The completed chain, including leaf, all intermediates, and root."
+        - "Returned as a list of PEM certificates."
+    returned: success
+    type: list
+'''
+
+import os
+
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils._text import to_bytes
+
+try:
+    import cryptography
+    import cryptography.hazmat.backends
+    import cryptography.hazmat.primitives.serialization
+    import cryptography.hazmat.primitives.asymmetric.rsa
+    import cryptography.hazmat.primitives.asymmetric.ec
+    import cryptography.hazmat.primitives.asymmetric.padding
+    import cryptography.hazmat.primitives.hashes
+    import cryptography.hazmat.primitives.asymmetric.utils
+    import cryptography.x509
+    import cryptography.x509.oid
+    from distutils.version import LooseVersion
+    HAS_CRYPTOGRAPHY = (LooseVersion(cryptography.__version__) >= LooseVersion('1.5'))
+    _cryptography_backend = cryptography.hazmat.backends.default_backend()
+except ImportError as e:
+    HAS_CRYPTOGRAPHY = False
+
+
+class Certificate(object):
+    '''
+    Stores PEM with parsed certificate.
+    '''
+    def __init__(self, pem, cert):
+        if not (pem.endswith('\n') or pem.endswith('\r')):
+            pem = pem + '\n'
+        self.pem = pem
+        self.cert = cert
+
+
+def is_parent(module, cert, potential_parent):
+    '''
+    Tests whether the given certificate has been issued by the potential parent certificate.
+    '''
+    # Check issuer
+    if cert.cert.issuer != potential_parent.cert.subject:
+        return False
+    # Check signature
+    public_key = potential_parent.cert.public_key()
+    try:
+        if isinstance(public_key, cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey):
+            public_key.verify(
+                cert.cert.signature,
+                cert.cert.tbs_certificate_bytes,
+                cryptography.hazmat.primitives.asymmetric.padding.PKCS1v15(),
+                cert.cert.signature_hash_algorithm
+            )
+        elif isinstance(public_key, cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey):
+            public_key.verify(
+                cert.cert.signature,
+                cert.cert.tbs_certificate_bytes,
+                cryptography.hazmat.primitives.asymmetric.ec.ECDSA(cert.cert.signature_hash_algorithm),
+            )
+        else:
+            # Unknown public key type
+            module.warn('Unknown public key type "{0}"'.format(public_key))
+            return False
+        return True
+    except cryptography.exceptions.InvalidSignature as e:
+        return False
+    except Exception as e:
+        module.fail_json(msg='Unknown error on signature validation: {0}'.format(e))
+
+
+def parse_PEM_list(module, text, source, fail_on_error=True):
+    '''
+    Parse concatenated PEM certificates. Return list of ``Certificate`` objects.
+    '''
+    result = []
+    lines = text.splitlines(True)
+    current = None
+    for line in lines:
+        if line.strip():
+            if line.startswith('-----BEGIN '):
+                current = [line]
+            elif current is not None:
+                current.append(line)
+                if line.startswith('-----END '):
+                    cert_pem = ''.join(current)
+                    current = None
+                    # Try to load PEM certificate
+                    try:
+                        cert = cryptography.x509.load_pem_x509_certificate(to_bytes(cert_pem), _cryptography_backend)
+                        result.append(Certificate(cert_pem, cert))
+                    except Exception as e:
+                        msg = 'Cannot parse certificate #{0} from {1}: {2}'.format(len(result) + 1, source, e)
+                        if fail_on_error:
+                            module.fail_json(msg=msg)
+                        else:
+                            module.warn(msg)
+    return result
+
+
+def load_PEM_list(module, path, fail_on_error=True):
+    '''
+    Load concatenated PEM certificates from file. Return list of ``Certificate`` objects.
+    '''
+    try:
+        with open(path, "rb") as f:
+            return parse_PEM_list(module, f.read().decode('utf-8'), source=path, fail_on_error=fail_on_error)
+    except Exception as e:
+        msg = 'Cannot read certificate file {0}: {1}'.format(path, e)
+        if fail_on_error:
+            module.fail_json(msg=msg)
+        else:
+            module.warn(msg)
+
+
+class CertificateSet(object):
+    '''
+    Stores a set of certificates. Allows to search for parent (issuer of a certificate).
+    '''
+
+    def __init__(self, module):
+        self.module = module
+        self.certificates = set()
+        self.certificate_by_issuer = dict()
+
+    def _load_file(self, path):
+        certs = load_PEM_list(self.module, path, fail_on_error=False)
+        for cert in certs:
+            self.certificates.add(cert)
+            self.certificate_by_issuer[cert.cert.subject] = cert
+
+    def load(self, path):
+        '''
+        Load lists of PEM certificates from a file or a directory.
+        '''
+        if os.path.isdir(path):
+            for dir, dummy, files in os.walk(path, followlinks=True):
+                for file in files:
+                    self._load_file(os.path.join(dir, file))
+        else:
+            self._load_file(path)
+
+    def find_parent(self, cert):
+        '''
+        Search for the parent (issuer) of a certificate. Return ``None`` if none was found.
+        '''
+        potential_parent = self.certificate_by_issuer.get(cert.cert.issuer)
+        if potential_parent is not None:
+            if is_parent(self.module, cert, potential_parent):
+                return potential_parent
+        return None
+
+
+def format_cert(cert):
+    '''
+    Return human readable representation of certificate for error messages.
+    '''
+    return str(cert.cert)
+
+
+def main():
+    module = AnsibleModule(
+        argument_spec=dict(
+            input_chain=dict(required=True, type='str'),
+            root_certificates=dict(required=True, type='list'),
+            intermediate_certificates=dict(required=False, type='list', default=[]),
+        ),
+        supports_check_mode=True,
+    )
+
+    if not HAS_CRYPTOGRAPHY:
+        module.fail_json(msg='cryptography >= 1.5 is required for this module.')
+
+    # Load chain
+    chain = parse_PEM_list(module, module.params['input_chain'], source='input chain')
+    if len(chain) == 0:
+        module.fail_json(msg='Input chain must contain at least one certificate')
+
+    # Check chain
+    for i, parent in enumerate(chain):
+        if i > 0:
+            if not is_parent(module, chain[i - 1], parent):
+                module.fail_json(msg=('Cannot verify input chain: certificate #{2}: {3} is not issuer ' +
+                                      'of certificate #{0}: {1}').format(i, format_cert(chain[i - 1]), i + 1, format_cert(parent)))
+
+    # Load intermediate certificates
+    intermediates = CertificateSet(module)
+    for path in module.params['intermediate_certificates']:
+        intermediates.load(os.path.expanduser(os.path.expandvars(path)))
+
+    # Load root certificates
+    roots = CertificateSet(module)
+    for path in module.params['root_certificates']:
+        roots.load(os.path.expanduser(os.path.expandvars(path)))
+
+    # Try to complete chain
+    current = chain[-1]
+    completed = []
+    while current:
+        root = roots.find_parent(current)
+        if root:
+            completed.append(root)
+            break
+        intermediate = intermediates.find_parent(current)
+        if intermediate:
+            completed.append(intermediate)
+            current = intermediate
+        else:
+            module.fail_json(msg='Cannot complete chain. Stuck at certificate {0}'.format(format_cert(current)))
+
+    # Return results
+    complete_chain = chain + completed
+    module.exit_json(
+        changed=False,
+        root=complete_chain[-1].pem,
+        chain=[cert.pem for cert in completed],
+        complete_chain=[cert.pem for cert in complete_chain],
+    )
+
+
+if __name__ == "__main__":
+    main()
--- a/test/integration/targets/certificate_complete_chain/aliases
+++ b/test/integration/targets/certificate_complete_chain/aliases
@ -0,0 +1 @@
+shippable/posix/group1
--- a/test/integration/targets/certificate_complete_chain/files/cert1-chain.pem
+++ b/test/integration/targets/certificate_complete_chain/files/cert1-chain.pem
@ -0,0 +1,22 @@
+-----BEGIN CERTIFICATE-----
+MIIDnzCCAyWgAwIBAgIQWyXOaQfEJlVm0zkMmalUrTAKBggqhkjOPQQDAzCBhTEL
+MAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UE
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+7IXOMCVZuoFwNLg0f+cB0eLLUg==
+-----END CERTIFICATE-----
--- a/test/integration/targets/certificate_complete_chain/files/cert1-fullchain.pem
+++ b/test/integration/targets/certificate_complete_chain/files/cert1-fullchain.pem
@ -0,0 +1,51 @@
+-----BEGIN CERTIFICATE-----
+MIIFBTCCBKugAwIBAgIQL+c9oQXpvdcOD3BKAncbgDAKBggqhkjOPQQDAjCBkjEL
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
+MIIDnzCCAyWgAwIBAgIQWyXOaQfEJlVm0zkMmalUrTAKBggqhkjOPQQDAzCBhTEL
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+-----END CERTIFICATE-----
--- a/test/integration/targets/certificate_complete_chain/files/cert1-root.pem
+++ b/test/integration/targets/certificate_complete_chain/files/cert1-root.pem
@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
--- a/test/integration/targets/certificate_complete_chain/files/cert1.pem
+++ b/test/integration/targets/certificate_complete_chain/files/cert1.pem
@ -0,0 +1,29 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
--- a/test/integration/targets/certificate_complete_chain/files/cert2-altchain.pem
+++ b/test/integration/targets/certificate_complete_chain/files/cert2-altchain.pem
@ -0,0 +1,32 @@
+-----BEGIN CERTIFICATE-----
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--- a/test/integration/targets/certificate_complete_chain/files/cert2-altroot.pem
+++ b/test/integration/targets/certificate_complete_chain/files/cert2-altroot.pem
@ -0,0 +1,31 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
--- a/test/integration/targets/certificate_complete_chain/files/cert2-chain.pem
+++ b/test/integration/targets/certificate_complete_chain/files/cert2-chain.pem
@ -0,0 +1,27 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
--- a/test/integration/targets/certificate_complete_chain/files/cert2-fullchain.pem
+++ b/test/integration/targets/certificate_complete_chain/files/cert2-fullchain.pem
@ -0,0 +1,72 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
--- a/test/integration/targets/certificate_complete_chain/files/cert2-root.pem
+++ b/test/integration/targets/certificate_complete_chain/files/cert2-root.pem
@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
--- a/test/integration/targets/certificate_complete_chain/files/cert2.pem
+++ b/test/integration/targets/certificate_complete_chain/files/cert2.pem
@ -0,0 +1,45 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
--- a/test/integration/targets/certificate_complete_chain/files/roots.pem
+++ b/test/integration/targets/certificate_complete_chain/files/roots.pem
--- a/test/integration/targets/certificate_complete_chain/files/roots/COMODO_Certification_Authority.pem
+++ b/test/integration/targets/certificate_complete_chain/files/roots/COMODO_Certification_Authority.pem
@ -0,0 +1,25 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
--- a/test/integration/targets/certificate_complete_chain/files/roots/COMODO_ECC_Certification_Authority.pem
+++ b/test/integration/targets/certificate_complete_chain/files/roots/COMODO_ECC_Certification_Authority.pem
@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
--- a/test/integration/targets/certificate_complete_chain/files/roots/COMODO_RSA_Certification_Authority.pem
+++ b/test/integration/targets/certificate_complete_chain/files/roots/COMODO_RSA_Certification_Authority.pem
@ -0,0 +1,34 @@
+-----BEGIN CERTIFICATE-----
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+jkk9u+UJueBPSZI9FoJAzMxZxuY67RIuaTxslbH9qh17f4a+Hg4yRvv7E491f0yL
+S0Zj/gA0QHDBw7mh3aZw4gSzQbzpgJHqZJx64SIDqZxubw5lT2yHh17zbqD5daWb
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+0MC2Hb46TpSi125sC8KKfPog88Tk5c0NqMuRkrF8hey1FGlmDoLnzc7ILaZRfyHB
+NVOFBkpdn627G190
+-----END CERTIFICATE-----
--- a/test/integration/targets/certificate_complete_chain/files/roots/DST_Root_CA_X3.pem
+++ b/test/integration/targets/certificate_complete_chain/files/roots/DST_Root_CA_X3.pem
@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
+MIIDSjCCAjKgAwIBAgIQRK+wgNajJ7qJMDmGLvhAazANBgkqhkiG9w0BAQUFADA/
+MSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMT
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+Ew5EU1QgUm9vdCBDQSBYMzCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB
+AN+v6ZdQCINXtMxiZfaQguzH0yxrMMpb7NnDfcdAwRgUi+DoM3ZJKuM/IUmTrE4O
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+xiqKqy69cK3FCxolkHRyxXtqqzTWMIn/5WgTe1QLyNau7Fqckh49ZLOMxt+/yUFw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+-----END CERTIFICATE-----
--- a/test/integration/targets/certificate_complete_chain/files/roots/ISRG_Root_X1.pem
+++ b/test/integration/targets/certificate_complete_chain/files/roots/ISRG_Root_X1.pem
@ -0,0 +1,31 @@
+-----BEGIN CERTIFICATE-----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+ubhzEFnTIZd+50xx+7LSYK05qAvqFyFWhfFQDlnrzuBZ6brJFe+GnY+EgPbk6ZGQ
+3BebYhtF8GaV0nxvwuo77x/Py9auJ/GpsMiu/X1+mvoiBOv/2X/qkSsisRcOj/KK
+NFtY2PwByVS5uCbMiogziUwthDyC3+6WVwW6LLv3xLfHTjuCvjHIInNzktHCgKQ5
+ORAzI4JMPJ+GslWYHb4phowim57iaztXOoJwTdwJx4nLCgdNbOhdjsnvzqvHu7Ur
+TkXWStAmzOVyyghqpZXjFaH3pO3JLF+l+/+sKAIuvtd7u+Nxe5AW0wdeRlN8NwdC
+jNPElpzVmbUq4JUagEiuTDkHzsxHpFKVK7q4+63SM1N95R1NbdWhscdCb+ZAJzVc
+oyi3B43njTOQ5yOf+1CceWxG1bQVs5ZufpsMljq4Ui0/1lvh+wjChP4kqKOJ2qxq
+4RgqsahDYVvTH9w7jXbyLeiNdd8XM2w9U/t7y0Ff/9yi0GE44Za4rF2LN9d11TPA
+mRGunUHBcnWEvgJBQl9nJEiU0Zsnvgc/ubhPgXRR4Xq37Z0j4r7g1SgEEzwxA57d
+emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc=
+-----END CERTIFICATE-----
--- a/test/integration/targets/certificate_complete_chain/tasks/main.yml
+++ b/test/integration/targets/certificate_complete_chain/tasks/main.yml
@ -0,0 +1,82 @@
+---
+- name: register cryptography version
+  command: python -c 'import cryptography; print(cryptography.__version__)'
+  register: cryptography_version
+
+- block:
+  # Cert 1: certificate for www.ansible.com, retrieved on 2018-08-15
+  - name: Find root for cert 1
+    certificate_complete_chain:
+      input_chain: "{{ lookup('file', 'cert1-fullchain.pem', rstrip=False) }}"
+      root_certificates:
+      - "{{ role_path }}/files/roots/"
+    register: cert1_root
+  - name: Verify root for cert 1
+    assert:
+      that:
+        - "cert1_root.complete_chain | join('') == (lookup('file', 'cert1.pem', rstrip=False) ~ lookup('file', 'cert1-chain.pem', rstrip=False) ~ lookup('file', 'cert1-root.pem', rstrip=False))"
+        - "cert1_root.root == lookup('file', 'cert1-root.pem', rstrip=False)"
+
+  - name: Find rootchain for cert 1
+    certificate_complete_chain:
+      input_chain: "{{ lookup('file', 'cert1.pem', rstrip=False) }}"
+      intermediate_certificates:
+      - "{{ role_path }}/files/cert1-chain.pem"
+      root_certificates:
+      - "{{ role_path }}/files/roots.pem"
+    register: cert1_rootchain
+  - name: Verify rootchain for cert 1
+    assert:
+      that:
+        - "cert1_rootchain.complete_chain | join('') == (lookup('file', 'cert1.pem', rstrip=False) ~ lookup('file', 'cert1-chain.pem', rstrip=False) ~ lookup('file', 'cert1-root.pem', rstrip=False))"
+        - "cert1_rootchain.chain[:-1] | join('') == lookup('file', 'cert1-chain.pem', rstrip=False)"
+        - "cert1_rootchain.root == lookup('file', 'cert1-root.pem', rstrip=False)"
+
+  # Cert 2: certificate for letsencrypt.org, retrieved on 2018-08-15
+  # Intermediate: cross-signed by IdenTrust
+  - name: Find root for cert 2
+    certificate_complete_chain:
+      input_chain: "{{ lookup('file', 'cert2-fullchain.pem', rstrip=False) }}"
+      root_certificates:
+      - "{{ role_path }}/files/roots/"
+    register: cert2_root
+  - name: Verify root for cert 2
+    assert:
+      that:
+        - "cert2_root.complete_chain | join('') == (lookup('file', 'cert2.pem', rstrip=False) ~ lookup('file', 'cert2-chain.pem', rstrip=False) ~ lookup('file', 'cert2-root.pem', rstrip=False))"
+        - "cert2_root.root == lookup('file', 'cert2-root.pem', rstrip=False)"
+
+  - name: Find rootchain for cert 2
+    certificate_complete_chain:
+      input_chain: "{{ lookup('file', 'cert2.pem', rstrip=False) }}"
+      intermediate_certificates:
+      - "{{ role_path }}/files/cert2-chain.pem"
+      root_certificates:
+      - "{{ role_path }}/files/roots.pem"
+    register: cert2_rootchain
+  - name: Verify rootchain for cert 2
+    assert:
+      that:
+        - "cert2_rootchain.complete_chain | join('') == (lookup('file', 'cert2.pem', rstrip=False) ~ lookup('file', 'cert2-chain.pem', rstrip=False) ~ lookup('file', 'cert2-root.pem', rstrip=False))"
+        - "cert2_rootchain.chain[:-1] | join('') == lookup('file', 'cert2-chain.pem', rstrip=False)"
+        - "cert2_rootchain.root == lookup('file', 'cert2-root.pem', rstrip=False)"
+
+  # Cert 2: certificate for letsencrypt.org, retrieved on 2018-08-15
+  # Intermediate: signed by ISRG root
+  - name: Find alternate rootchain for cert 2
+    certificate_complete_chain:
+      # Remove line ending, make sure it is re-added by code
+      input_chain: "{{ lookup('file', 'cert2.pem', rstrip=True) }}"
+      intermediate_certificates:
+      - "{{ role_path }}/files/cert2-altchain.pem"
+      root_certificates:
+      - "{{ role_path }}/files/roots.pem"
+    register: cert2_rootchain_alt
+  - name: Verify rootchain for cert 2
+    assert:
+      that:
+        - "cert2_rootchain_alt.complete_chain | join('') == (lookup('file', 'cert2.pem', rstrip=False) ~ lookup('file', 'cert2-altchain.pem', rstrip=False) ~ lookup('file', 'cert2-altroot.pem', rstrip=False))"
+        - "cert2_rootchain_alt.chain[:-1] | join('') == lookup('file', 'cert2-altchain.pem', rstrip=False)"
+        - "cert2_rootchain_alt.root == lookup('file', 'cert2-altroot.pem', rstrip=False)"
+
+  when: cryptography_version.stdout is version('1.5', '>=')
--- a/test/sanity/code-smell/use-argspec-type-path.py
+++ b/test/sanity/code-smell/use-argspec-type-path.py
@ -22,6 +22,7 @@ def main():
        'lib/ansible/modules/web_infrastructure/ansible_tower/tower_group.py',
        'lib/ansible/modules/web_infrastructure/jenkins_plugin.py',
        'lib/ansible/modules/cloud/vmware/vmware_deploy_ovf.py',
+        'lib/ansible/modules/crypto/certificate_complete_chain.py',  # would need something like type=list(path)
        # fix uses of expanduser in the following modules and remove them from the following list
        'lib/ansible/modules/cloud/rackspace/rax.py',
        'lib/ansible/modules/cloud/rackspace/rax_scaling_group.py',