diff options
| -rw-r--r-- | data/templates/ipsec/ios_profile.j2 | 9 | ||||
| -rw-r--r-- | data/templates/ipsec/windows_profile.j2 | 2 | ||||
| -rwxr-xr-x | src/op_mode/ikev2_profile_generator.py | 85 |
3 files changed, 83 insertions, 13 deletions
diff --git a/data/templates/ipsec/ios_profile.j2 b/data/templates/ipsec/ios_profile.j2 index 935acbf8e..966fad433 100644 --- a/data/templates/ipsec/ios_profile.j2 +++ b/data/templates/ipsec/ios_profile.j2 @@ -55,9 +55,11 @@ <!-- The server is authenticated using a certificate --> <key>AuthenticationMethod</key> <string>Certificate</string> +{% if authentication.client_mode.startswith("eap") %} <!-- The client uses EAP to authenticate --> <key>ExtendedAuthEnabled</key> <integer>1</integer> +{% endif %} <!-- The next two dictionaries are optional (as are the keys in them), but it is recommended to specify them as the default is to use 3DES. IMPORTANT: Because only one proposal is sent (even if nothing is configured here) it must match the server configuration --> <key>IKESecurityAssociationParameters</key> @@ -78,9 +80,14 @@ <string>{{ esp_encryption.encryption }}</string> <key>IntegrityAlgorithm</key> <string>{{ esp_encryption.hash }}</string> +{% if esp_encryption.pfs is vyos_defined %} <key>DiffieHellmanGroup</key> - <integer>{{ ike_encryption.dh_group }}</integer> + <integer>{{ esp_encryption.pfs }}</integer> +{% endif %} </dict> + <!-- Controls whether the client offers Perfect Forward Secrecy (PFS). This should be set to match the server. --> + <key>EnablePFS</key> + <integer>{{ '1' if esp_encryption.pfs is vyos_defined else '0' }}</integer> </dict> </dict> {% if ca_certificates is vyos_defined %} diff --git a/data/templates/ipsec/windows_profile.j2 b/data/templates/ipsec/windows_profile.j2 index 8c26944be..b5042f987 100644 --- a/data/templates/ipsec/windows_profile.j2 +++ b/data/templates/ipsec/windows_profile.j2 @@ -1,4 +1,4 @@ Remove-VpnConnection -Name "{{ vpn_name }}" -Force -PassThru Add-VpnConnection -Name "{{ vpn_name }}" -ServerAddress "{{ remote }}" -TunnelType "Ikev2" -Set-VpnConnectionIPsecConfiguration -ConnectionName "{{ vpn_name }}" -AuthenticationTransformConstants {{ ike_encryption.encryption }} -CipherTransformConstants {{ ike_encryption.encryption }} -EncryptionMethod {{ esp_encryption.encryption }} -IntegrityCheckMethod {{ esp_encryption.hash }} -PfsGroup None -DHGroup "Group{{ ike_encryption.dh_group }}" -PassThru -Force +Set-VpnConnectionIPsecConfiguration -ConnectionName "{{ vpn_name }}" -AuthenticationTransformConstants {{ ike_encryption.encryption }} -CipherTransformConstants {{ ike_encryption.encryption }} -EncryptionMethod {{ esp_encryption.encryption }} -IntegrityCheckMethod {{ esp_encryption.hash }} -PfsGroup {{ esp_encryption.pfs }} -DHGroup {{ ike_encryption.dh_group }} -PassThru -Force diff --git a/src/op_mode/ikev2_profile_generator.py b/src/op_mode/ikev2_profile_generator.py index b193d8109..cf2bc6d5c 100755 --- a/src/op_mode/ikev2_profile_generator.py +++ b/src/op_mode/ikev2_profile_generator.py @@ -105,10 +105,39 @@ vyos2windows_integrity = { } # IOS 14.2 and later do no support dh-group 1,2 and 5. Supported DH groups would -# be: 14, 15, 16, 17, 18, 19, 20, 21, 31 -ios_supported_dh_groups = ['14', '15', '16', '17', '18', '19', '20', '21', '31'] -# Windows 10 only allows a limited set of DH groups -windows_supported_dh_groups = ['1', '2', '14', '24'] +# be: 14, 15, 16, 17, 18, 19, 20, 21, 31, 32 +vyos2apple_dh_group = { + '14' : '14', + '15' : '15', + '16' : '16', + '17' : '17', + '18' : '18', + '19' : '19', + '20' : '20', + '21' : '21', + '31' : '31', + '32' : '32' +} + +# Newer versions of Windows support groups 19 and 20, albeit under a different naming convention +vyos2windows_dh_group = { + '1' : 'Group1', + '2' : 'Group2', + '14' : 'Group14', + '19' : 'ECP256', + '20' : 'ECP384', + '24' : 'Group24' +} + +# For PFS, Windows also has its own inconsistent naming scheme for each group +vyos2windows_pfs_group = { + '1' : 'PFS1', + '2' : 'PFS2', + '14' : 'PFS2048', + '19' : 'ECP256', + '20' : 'ECP384', + '24' : 'PFS24' +} parser = argparse.ArgumentParser() parser.add_argument('--os', const='all', nargs='?', choices=['ios', 'windows'], help='Operating system used for config generation', required=True) @@ -181,7 +210,7 @@ if args.os == 'ios': # https://stackoverflow.com/a/9427216 data['ca_certificates'] = [dict(t) for t in {tuple(d.items()) for d in data['ca_certificates']}] -esp_proposals = conf.get_config_dict(ipsec_base + ['esp-group', data['esp_group'], 'proposal'], +esp_group = conf.get_config_dict(ipsec_base + ['esp-group', data['esp_group']], key_mangling=('-', '_'), get_first_key=True) ike_proposal = conf.get_config_dict(ipsec_base + ['ike-group', data['ike_group'], 'proposal'], key_mangling=('-', '_'), get_first_key=True) @@ -192,7 +221,29 @@ ike_proposal = conf.get_config_dict(ipsec_base + ['ike-group', data['ike_group'] vyos2client_cipher = vyos2apple_cipher if args.os == 'ios' else vyos2windows_cipher; vyos2client_integrity = vyos2apple_integrity if args.os == 'ios' else vyos2windows_integrity; -supported_dh_groups = ios_supported_dh_groups if args.os == 'ios' else windows_supported_dh_groups; +vyos2client_dh_group = vyos2apple_dh_group if args.os == 'ios' else vyos2windows_dh_group + +def transform_pfs(pfs, ike_dh_group): + pfs_enabled = (pfs != 'disable') + if pfs == 'enable': + pfs_dh_group = ike_dh_group + elif pfs.startswith('dh-group'): + pfs_dh_group = pfs.removeprefix('dh-group') + + if args.os == 'ios': + if pfs_enabled: + if pfs_dh_group not in set(vyos2apple_dh_group): + exit(f'The PFS group configured for "{args.connection}" is not supported by the client!') + return pfs_dh_group + else: + return None + else: + if pfs_enabled: + if pfs_dh_group not in set(vyos2windows_pfs_group): + exit(f'The PFS group configured for "{args.connection}" is not supported by the client!') + return vyos2windows_pfs_group[ pfs_dh_group ] + else: + return 'None' # Create a dictionary containing client conform IKE settings ike = {} @@ -201,24 +252,28 @@ for _, proposal in ike_proposal.items(): if {'dh_group', 'encryption', 'hash'} <= set(proposal): if (proposal['encryption'] in set(vyos2client_cipher) and proposal['hash'] in set(vyos2client_integrity) and - proposal['dh_group'] in set(supported_dh_groups)): + proposal['dh_group'] in set(vyos2client_dh_group)): # We 're-code' from the VyOS IPsec proposals to the Apple naming scheme proposal['encryption'] = vyos2client_cipher[ proposal['encryption'] ] proposal['hash'] = vyos2client_integrity[ proposal['hash'] ] + # DH group will need to be transformed later after we calculate PFS group ike.update( { str(count) : proposal } ) count += 1 -# Create a dictionary containing Apple conform ESP settings +# Create a dictionary containing client conform ESP settings esp = {} count = 1 -for _, proposal in esp_proposals.items(): +for _, proposal in esp_group['proposal'].items(): if {'encryption', 'hash'} <= set(proposal): if proposal['encryption'] in set(vyos2client_cipher) and proposal['hash'] in set(vyos2client_integrity): # We 're-code' from the VyOS IPsec proposals to the Apple naming scheme proposal['encryption'] = vyos2client_cipher[ proposal['encryption'] ] proposal['hash'] = vyos2client_integrity[ proposal['hash'] ] + # Copy PFS setting from the group, if present (we will need to + # transform this later once the IKE group is selected) + proposal['pfs'] = esp_group.get('pfs', 'enable') esp.update( { str(count) : proposal } ) count += 1 @@ -230,8 +285,10 @@ try: tmp += f'({number}) Encryption {options["encryption"]}, Integrity {options["hash"]}, DH group {options["dh_group"]}\n' tmp += '\nSelect one of the above IKE groups: ' data['ike_encryption'] = ike[ ask_input(tmp, valid_responses=list(ike)) ] - else: + elif len(ike) == 1: data['ike_encryption'] = ike['1'] + else: + exit(f'None of the configured IKE proposals for "{args.connection}" are supported by the client!') if len(esp) > 1: tmp = '\n' @@ -239,12 +296,18 @@ try: tmp += f'({number}) Encryption {options["encryption"]}, Integrity {options["hash"]}\n' tmp += '\nSelect one of the above ESP groups: ' data['esp_encryption'] = esp[ ask_input(tmp, valid_responses=list(esp)) ] - else: + elif len(esp) == 1: data['esp_encryption'] = esp['1'] + else: + exit(f'None of the configured ESP proposals for "{args.connection}" are supported by the client!') except KeyboardInterrupt: exit("Interrupted") +# Transform the DH and PFS groups now that all selections are known +data['esp_encryption']['pfs'] = transform_pfs(data['esp_encryption']['pfs'], data['ike_encryption']['dh_group']) +data['ike_encryption']['dh_group'] = vyos2client_dh_group[ data['ike_encryption']['dh_group'] ] + print('\n\n==== <snip> ====') if args.os == 'ios': print(render_to_string('ipsec/ios_profile.j2', data)) |