pki: ipsec: T3642: Migrate IPSec to use PKI configuration

1 files changed, 137 insertions, 0 deletions

diff --git a/src/migration-scripts/ipsec/6-to-7 b/src/migration-scripts/ipsec/6-to-7
new file mode 100755
index 000000000..6655fba93
--- /dev/null
+++ b/src/migration-scripts/ipsec/6-to-7
@@ -0,0 +1,137 @@
+#!/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/>.
+
+# Migrate /config/auth certificates and keys into PKI configuration
+
+import os
+
+from sys import argv
+from sys import exit
+
+from vyos.configtree import ConfigTree
+from vyos.pki import load_certificate
+from vyos.pki import load_crl
+from vyos.pki import load_private_key
+from vyos.pki import encode_certificate
+from vyos.pki import encode_private_key
+
+if (len(argv) < 1):
+    print("Must specify file name!")
+    exit(1)
+
+file_name = argv[1]
+
+with open(file_name, 'r') as f:
+    config_file = f.read()
+
+pki_base = ['pki']
+ipsec_site_base = ['vpn', 'ipsec', 'site-to-site', 'peer']
+
+config = ConfigTree(config_file)
+changes_made = False
+
+AUTH_DIR = '/config/auth'
+
+def wrapped_pem_to_config_value(pem):
+    return "".join(pem.strip().split("\n")[1:-1])
+
+if config.exists(ipsec_site_base):
+    config.set(pki_base + ['ca'])
+    config.set_tag(pki_base + ['ca'])
+
+    config.set(pki_base + ['certificate'])
+    config.set_tag(pki_base + ['certificate'])
+
+    for peer in config.list_nodes(ipsec_site_base):
+        if not config.exists(ipsec_site_base + [peer, 'authentication', 'x509']):
+            continue
+
+        changes_made = True
+
+        peer_x509_base = ipsec_site_base + [peer, 'authentication', 'x509']
+        pki_name = 'peer_' + peer.replace(".", "-")
+
+        if config.exists(peer_x509_base + ['cert-file']):
+            cert_file = config.return_value(peer_x509_base + ['cert-file'])
+            cert_path = os.path.join(AUTH_DIR, cert_file)
+            cert = None
+
+            with open(cert_path, 'r') as f:
+                cert_data = f.read()
+                cert = load_certificate(cert_data, wrap_tags=False)
+
+            cert_pem = encode_certificate(cert)
+            config.set(pki_base + ['certificate', pki_name, 'certificate'], value=wrapped_pem_to_config_value(cert_pem))
+            config.set(peer_x509_base + ['certificate'], value=pki_name)
+            config.delete(peer_x509_base + ['cert-file'])
+
+        if config.exists(peer_x509_base + ['ca-cert-file']):
+            ca_cert_file = config.return_value(peer_x509_base + ['ca-cert-file'])
+            ca_cert_path = os.path.join(AUTH_DIR, ca_cert_file)
+            ca_cert = None
+
+            with open(ca_cert_path, 'r') as f:
+                ca_cert_data = f.read()
+                ca_cert = load_certificate(ca_cert_data, wrap_tags=False)
+
+            ca_cert_pem = encode_certificate(ca_cert)
+            config.set(pki_base + ['ca', pki_name, 'certificate'], value=wrapped_pem_to_config_value(ca_cert_pem))
+            config.set(peer_x509_base + ['ca-certificate'], value=pki_name)
+            config.delete(peer_x509_base + ['ca-cert-file'])
+
+        if config.exists(peer_x509_base + ['crl-file']):
+            crl_file = config.return_value(peer_x509_base + ['crl-file'])
+            crl_path = os.path.join(AUTH_DIR, crl_file)
+            crl = None
+
+            with open(crl_path, 'r') as f:
+                crl_data = f.read()
+                crl = load_crl(crl_data, wrap_tags=False)
+
+            crl_pem = encode_certificate(crl)
+            config.set(pki_base + ['ca', pki_name, 'crl'], value=wrapped_pem_to_config_value(crl_pem))
+            config.delete(peer_x509_base + ['crl-file'])
+
+        if config.exists(peer_x509_base + ['key', 'file']):
+            key_file = config.return_value(peer_x509_base + ['key', 'file'])
+            key_passphrase = None
+
+            if config.exists(peer_x509_base + ['key', 'password']):
+                key_passphrase = config.return_value(peer_x509_base + ['key', 'password'])
+
+            key_path = os.path.join(AUTH_DIR, key_file)
+            key = None
+
+            with open(key_path, 'r') as f:
+                key_data = f.read()
+                key = load_private_key(key_data, passphrase=key_passphrase, wrap_tags=False)
+
+            key_pem = encode_private_key(key, passphrase=key_passphrase)
+            config.set(pki_base + ['certificate', pki_name, 'private', 'key'], value=wrapped_pem_to_config_value(key_pem))
+
+            if key_passphrase:
+                config.set(pki_base + ['certificate', pki_name, 'private', 'password-protected'])
+                config.set(peer_x509_base + ['private-key-passphrase'], value=key_passphrase)
+            
+            config.delete(peer_x509_base + ['key'])
+
+if changes_made:
+    try:
+        with open(file_name, 'w') as f:
+            f.write(config.to_string())
+    except OSError as e:
+        print("Failed to save the modified config: {}".format(e))
+        sys.exit(1)