pki: T3642: New PKI config and management

1 files changed, 167 insertions, 0 deletions

diff --git a/src/conf_mode/pki.py b/src/conf_mode/pki.py
new file mode 100755
index 000000000..ef1b57650
--- /dev/null
+++ b/src/conf_mode/pki.py
@@ -0,0 +1,167 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2021 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from sys import exit
+
+from vyos.config import Config
+from vyos.configdict import dict_merge
+from vyos.pki import is_ca_certificate
+from vyos.pki import load_certificate
+from vyos.pki import load_certificate_request
+from vyos.pki import load_public_key
+from vyos.pki import load_private_key
+from vyos.pki import load_crl
+from vyos.pki import load_dh_parameters
+from vyos.util import ask_input
+from vyos.xml import defaults
+from vyos import ConfigError
+from vyos import airbag
+airbag.enable()
+
+def get_config(config=None):
+    if config:
+        conf = config
+    else:
+        conf = Config()
+    base = ['pki']
+    if not conf.exists(base):
+        return None
+
+    pki = conf.get_config_dict(base, key_mangling=('-', '_'),
+                                     get_first_key=True, no_tag_node_value_mangle=True)
+
+    default_values = defaults(base)
+    pki = dict_merge(default_values, pki)
+    return pki
+
+def is_valid_certificate(raw_data):
+    # If it loads correctly we're good, or return False
+    return load_certificate(raw_data, wrap_tags=True)
+
+def is_valid_ca_certificate(raw_data):
+    # Check if this is a valid certificate with CA attributes
+    cert = load_certificate(raw_data, wrap_tags=True)
+    if not cert:
+        return False
+    return is_ca_certificate(cert)
+
+def is_valid_public_key(raw_data):
+    # If it loads correctly we're good, or return False
+    return load_public_key(raw_data, wrap_tags=True)
+
+def is_valid_private_key(raw_data, protected=False):
+    # If it loads correctly we're good, or return False
+    # With encrypted private keys, we always return true as we cannot ask for password to verify
+    if protected:
+        return True
+    return load_private_key(raw_data, passphrase=None, wrap_tags=True)
+
+def is_valid_crl(raw_data):
+    # If it loads correctly we're good, or return False
+    return load_crl(raw_data, wrap_tags=True)
+
+def is_valid_dh_parameters(raw_data):
+    # If it loads correctly we're good, or return False
+    return load_dh_parameters(raw_data, wrap_tags=True)
+
+def verify(pki):
+    if not pki:
+        return None
+
+    if 'ca' in pki:
+        for name, ca_conf in pki['ca'].items():
+            if 'certificate' in ca_conf:
+                if not is_valid_ca_certificate(ca_conf['certificate']):
+                    raise ConfigError(f'Invalid certificate on CA certificate "{name}"')
+
+            if 'private' in ca_conf and 'key' in ca_conf['private']:
+                private = ca_conf['private']
+                protected = 'password_protected' in private
+
+                if not is_valid_private_key(private['key'], protected):
+                    raise ConfigError(f'Invalid private key on CA certificate "{name}"')
+
+            if 'crl' in ca_conf:
+                ca_crls = ca_conf['crl']
+                if isinstance(ca_crls, str):
+                    ca_crls = [ca_crls]
+
+                for crl in ca_crls:
+                    if not is_valid_crl(crl):
+                        raise ConfigError(f'Invalid CRL on CA certificate "{name}"')
+
+    if 'certificate' in pki:
+        for name, cert_conf in pki['certificate'].items():
+            if 'certificate' in cert_conf:
+                if not is_valid_certificate(cert_conf['certificate']):
+                    raise ConfigError(f'Invalid certificate on certificate "{name}"')
+
+            if 'private' in cert_conf and 'key' in cert_conf['private']:
+                private = cert_conf['private']
+                protected = 'password_protected' in private
+
+                if not is_valid_private_key(private['key'], protected):
+                    raise ConfigError(f'Invalid private key on certificate "{name}"')
+
+    if 'dh' in pki:
+        for name, dh_conf in pki['dh'].items():
+            if 'parameters' in dh_conf:
+                if not is_valid_dh_parameters(dh_conf['parameters']):
+                    raise ConfigError(f'Invalid DH parameters on "{name}"')
+
+    if 'key_pair' in pki:
+        for name, key_conf in pki['key_pair'].items():
+            if 'public' in key_conf and 'key' in key_conf['public']:
+                if not is_valid_public_key(key_conf['public']['key']):
+                    raise ConfigError(f'Invalid public key on key-pair "{name}"')
+
+            if 'private' in key_conf and 'key' in key_conf['private']:
+                private = key_conf['private']
+                protected = 'password_protected' in private
+                if not is_valid_private_key(private['key'], protected):
+                    raise ConfigError(f'Invalid private key on key-pair "{name}"')
+
+    if 'x509' in pki:
+        if 'default' in pki['x509']:
+            default_values = pki['x509']['default']
+            if 'country' in default_values:
+                country = default_values['country']
+                if len(country) != 2 or not country.isalpha():
+                    raise ConfigError(f'Invalid default country value. Value must be 2 alpha characters.')
+
+    return None
+
+def generate(pki):
+    if not pki:
+        return None
+
+    return None
+
+def apply(pki):
+    if not pki:
+        return None
+
+    return None
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        exit(1)